SQUEEZING DEVICE FOR UNDERGROUND PROJECT

Abstract

A squeezing device for an underground project, comprising a guide body, a vibration system, a lubricating system, a guide system, a cutting mechanism and a gate, wherein the vibration system is located on four walls of the guide body, the lubricating system is internally provided with a lubricating pipeline along the four walls of the guide body and communicates with a corresponding lubricating nozzle, the guide system is located on four walls at a front end of the guide body, and the cutting mechanism is located at a front end of an inner cavity of the guide body, and the gate is located in a functional bin.

Description

TECHNOLOGY FIELD

This invention relates to squeezing devices for underground projects, belonging to the technical field of underground space development.

BACKGROUND TECHNOLOGY

At present, there are mainly two types of underground construction methods: open excavation and mining method. Open excavation includes open-top excavation and covered excavation top-down method. Mining method includes shield method, foreign new Austrian tunneling method (NATM) and domestic shallow tunneling method. Mining method is widely used in underground projects because it minimizes demolition, has minimal ground environment interference, and does not require traffic interruption. The current mining methods are generally called time-and-space effect construction methods. Time-and-space effects based on theoretical calculations are reliable under normal conditions. However, due to variations in geology, limitation of survey/exploration data, coincidence of surrounding accidents, and soil index variance in the process of construction, these factors can form various risks for underground construction accidents. At the same time, currently there are various factors we cannot completely control by relying on supporting structures to passively resist the complex deformation stress and loosening stress of soil.

SUMMARY OF INVENTION

Underground project squeezing devices of the invention are beyond the scope of time-and-space construction limitations. The devices of the invention can effectively avoid the undesirable effects and risks caused by ground subsidence and deformation as a result of soil loss during underground space construction. Under the premise of no interruption to the major urban traffic, methods of the invention have obvious safety and technological advantages and resource saving effects in the construction of stereo crossover or underground space development under existing buildings or urban underground complex pipe rack constructions.

Embodiments of the invention may be realized by adopting the following technologies:

An underground project squeezing device of the invention may include a guide body, a vibration system, a lubrication system, a guidance system, a cutting structure, and a gate. The vibration system may be located on the four inner walls of the guide body. The lubrication system lubricates pipes located along the four inner walls of the guide body and connects with lubrication nozzles disposed at suitable locations. The guidance system may be located in the four inner walls on the front end. The cutting structure located in the front end of inner cavity of the conductor, and the sluice is located in the inner side of upper and lower walls of the conductor.

The conductor includes squeezing cavity, shell walls and functional chamber. The squeezing cavity is a trapezoid-shaped or cone-shaped hollow cavity with certain length, width and height, and the projecting area of the front end of the squeezing cavity is less than the back end. The shell wall is a grid steel structure which is made of two layers of panels, and between which a reinforced board is added so as to strengthen the thickness and strength of the shell.

The conductor includes front and back parts. The front part is the trapezoid-shaped or cone-shaped squeezing cavity, and the back part is the functional chamber connecting with the prestress concrete cavity. The functional chamber is a hollow rectangle steel structure with certain length. The front part of the functional chamber is the same as the outer size of the back end of the squeezing cavity, and the back part is the same as the size of the front part of prestress concrete cavity. The prestress concrete cavity is a hollow rectangle precasting concrete part with certain wall thickness and section length, and extra sections can be connected to prolong the cavity. The interface of the front end of the functional chamber and the back end of the squeezing cavity uses flexible sealing gasket, and is put into the sealing groove which is specially designed by avoiding the positions of bolt holes. The flexible sealing gasket bulges a little above the top surface of the sealing groove, and the connecting point adopts bumpy paneling jointing method. The bulging surface of the flexible sealing gasket is fastened to the top surface of the sealing groove when fastening the bolt so as to strengthen sealing effect, and it can also prevent water leakage in case that the flexible sealing gasket is damaged by powerful bearing stress. The joint datum of back end of the functional chamber and the prestress concrete cavity and the vertical plane and horizontal plane of the joint datum of the front and back prestress concrete cavity adopt flexible sealing gasket, and is inserted in the sealing groove of vertical plane and horizontal plane of the prestress concrete cavity. Thus two-level sealing is realized on the jointing point.

The section size of the front end of function cavity is the same as that of the back end of squeezing cavity, and the section size of the back end of function cavity is also the same as that of the prestress concrete cavity. There is a shoulder along the perimeter of the shell on the jointing point of the squeezing cavity and functional chamber, and there are bolt holes along the surroundings of the shoulder and connected by bolts. There is enough space for installing revolving door, axle socket of upper door, axle socket of lower door, principle disc cutter base, subsidiary disc cutter base, power equipment and transmission opponents in the functional chamber, which will play a jointing role.

The mentioned vibrating system includes gas source vibrator, air duct and vibrating sheet. There are rectangle or circular holes with certain areas in appropriate positions in the squeezing cavity and the four walls of the functional chamber. The edges inside the holes are step-sized, and there are sealing gaskets on the surface of the steps. The vibrating sheets are pressed on the sealing gaskets and installed on the steps inside the holes by bolts.

The outer surface is a little higher than the outer surface of the shell walls after the vibrating sheet is installed. The gas source vibrator is installed in appropriate positions on the bottom of the vibrating sheet, which is connected with the other gas source vibrators along the air ducts between the plates of the shell walls. There are checking holes on the jointing parts of gas source vibrators and air ducts, which is used for installing and repairing the joints of air ducts and gas source vibrators. The checking holes adopt inner cover plates and are blocked by screwing hard with the inner walls of the shell through bolts and sealing gaskets. By pumping into high-pressure gas through the air duct, the vibrator's amplitude and exciting force on the vibrating sheet are spread to the sand sticking to the vibrating sheet, and reduce the friction by destroying the conductor's electrostatic adsorption effect caused by sand. The mentioned lubrication system includes lubrication pipes and lubrication nozzles. The main lubrication pipe is installed in appropriate positions between the two planes of the shell wall, and the outer end of which connects with lubricant pump, and is connected with the subsidiary lubrication pipe along the extending direction of the main lubrication pipe. There are checking holes inside the shell walls on the lubrication nozzle for checking and connecting, and the structure and installing method of which are the same as the checking holes of vibrating system.

There is at least one lubrication nozzle in appropriate positions in the four inner walls of the squeezing cavity, the functional chamber and the prestressing concrete cavity. There is outer thread on lubrication nozzles, which could be screwed tightly with inner thread of the walls of the shell and the walls of prestressing concrete cavity. The outlet of the lubrication nozzle is fan-shaped, and the direction of which is on the contrary to the squeezing direction in case of being blocked. The lubricant modulated according to the land conditions will be sprayed from the lubrication nozzle through lubrication pipes by mud pump, and a thin layer of liquid separator is formed in the interface between the sand and walls of conductors, and therefore the giant lateral resistance between the sand and the shell will be reduced.

The mentioned guidance system includes guide plates, steering cylinders, shafts, jointing bases and oil pipes. There is at least one guide plate on each wall of the front end of the squeezing cavity, and there is a boss on the back end of the guide plate. There are grooves on the front end of the squeezing cavity walls, and there are bearing holes in the center of grooves and bosses. The bosses should insert the grooves and the shafts should insert the bearing holes, thus, the bosses of the guide plate will hinge together with the grooves of the squeezing cavity. There is a matching steering cylinder on appropriate position inside the walls of the squeezing cavity, which is driven by transporting hydraulic oil through oil pipes. The piston rod of the steering cylinder hinges with the jointing base of the guide plate by shafts, and propels the guide plate to change in certain angles.

There is at least one jointing base in the shell of a guide plate, which is used for hinging for the piston rod of the steering cylinder. The guide plates on the left and right side are left-and-right steering team, and the guide plates on the upper and lower side is up-and-down steering team. Each team hinges with related bearing holes of the piston rods of steering cylinders. When the piston rod of the steering cylinder on the vertical side protrudes or withdraws, the counterpart will react oppositely, which will drive the jointing base of the guide plate to move synchronously. Thus the guide plate will rotate around the shaft through the bearing holes of the boss and the grooves, and there will occur angle changes towards the left or right side. As the same, the piston rod of the horizon steering cylinders protrudes or withdraws, the counterpart will also withdraw or protrudes oppositely. The guide plate of the jointing base will be driven to rotate around the shaft in certain angles, thus the horizontal moving position of the squeezing cavity is adjusted in appropriate angles.

The mentioned cutting structure includes principle disc cutters, secondary disc cutters, hard rock hammers, principle transmission shafts, secondary transmission shafts, transmission keys, power devices and fixing frames. The principle disc cutter includes cutting blade, principle transmission shaft and power device. The principle disc cutter is circular, lying in the front end of the squeezing cavity. The front end-face of the principle is a little behind of the front end-face of the guide plate. There is at least a principle disc cutter according to the size of the cross section of the squeezing cavity. There are blades at intervals with different angles on the front end-face of the principle disc cutter. The back end of the principle disc cutter connects with power device on the back end by principle transmission shaft, and the power device will drive the principle transmission shaft, thus the principle disc cutter will be driven and produce giant torque. The power device adopts hydraulic motors. There is at least a secondary disc cutter on the hollow part between the principle disc cutter and the frame of the front end of the squeezing cavity. There are also blades at intervals with different angles on the front end-face of the secondary disc cutter. The secondary disc cutter is sleeve-jointed with the keyway of the secondary transmission shaft connecting with the power device by the transmission key. Through the secondary transmission shaft, the power device passes the rolling torque to the transmission key fixed in the center of the back end of the secondary disc cutter, thus the secondary disc cutter is driven to rotate and cut the soil. There are vertical holes in the axis of secondary transmission shaft, and there are horizontal thrusting cylinders along the vertical holes. The piston rod of the horizontal thrusting cylinder is hinged by shafts with the back end of the secondary disc cutter. That the piston rod of the horizontal thrusting cylinder protrudes or withdraws will drive the transmission key connected with the secondary disc cutter to move along the keyway of the secondary transmission shaft, and axial displacement will occur to the secondary disc cutter in certain distance. Thus, the purpose of adjusting the distance and pressure of the secondary disc cuter and the soil, and changing cutting volume and process will be realized. The function of the blades on the front ends of the principle disc cutter and the secondary disc cutter is to cut soil quickly without being wrapped, and the space between the blades will not be filled. The principle transmission shaft and secondary transmission shaft are fixed by fixing frames set in the functional chamber. There are air driven hammers in the space between the principle disc cutter and secondary cutter, the driving method of which is the same as that of the secondary disc cutter. But the hammers use air cylinders as power rather than oil cylinders. Under common circumstance, the air driven hammer lies in the rear and does not work. When there are stones or rock interlayers, high-pressure air could be input and the piston rod of the cylinder intrudes and pushes the air driven hammer forward ahead of the principle disc cutter and the secondary cutter, then the air driven hammer is started and breaks the rocks avoiding the embarrassing situation of interrupting squeezing.

the mentioned sluice includes revolving door, axle socket of upper door, axle socket of lower door, door shaft, two-way cylinder, upper-arc track, lower-arc track, driving cylinder, piston rod connector of driving steering cylinder, rear flat globe, bearing hole, support axle, support axle socket, fixed pulley, axle, axle socket, steering wheel, bearing, steel cable, shack, pulley groove, knobs, multi-hole anchor and wedge valve.

The revolving door is a rectangle steel structure with certain thickness, which is made up of two door plates between which there is a grid reinforced plate. There is at least a revolving door in each functional chamber. There is a circular door shaft, being fixed with the revolving door. The upper end of the shaft is installed in the axle socket of upper door, and the lower end is installed in the axle socket of lower door, and the center of the axle sockets of upper door and the lower door corresponds exactly with each other.

There are two styles for the transmission of the revolving door: the first is to be driven by oil cylinders. The revolving door is driven by cylinders. There is an upper-arc track clockwise on the top of the revolving door by the side of door shaft, and there is a lower-arc track anticlockwise at the bottom of the revolving door on the opposite side. The piston rod connector of the upper driving cylinder is embedded into the upper-arc track, and the piston rod connector of the lower driving cylinder is embedded into the lower-arc track, and a shaft is used for hinging.

The revolving door is driven by cylinders. There is an upper-arc track clockwise on the top of the revolving door by the side of door shaft, and there is a lower-arc track anticlockwise at the bottom of the revolving door on the opposite side. The piston rod connector of the upper driving cylinder is embedded into the upper-arc track, and the piston rod connector of the lower driving cylinder is embedded into the lower-arc track, and a shaft is used for hinging. The protrusion and retraction directions of the piston rod of the upper driving cylinder and the lower driving cylinder make relative motions. The upper driving cylinder and the lower driving cylinder are installed on appropriate positions in the inner walls of the conductor of upper-arc track (50) and lower-arc track. When the upper driving cylinder protrudes, its piston rod connector will push the upper-arc track and drive the revolving door to revolve clockwise, and the lower driving cylinder will also protrude and push the lower driving cylinder and drive the revolving door to revolve clockwise. As the upper driving cylinder and the lower driving cylinder protrude at the same time on the upper and lower end of the revolving door, there will occur impelling force with the door shaft as the fulcrum, which will drive the revolving door to revolve clockwise through the upper-arc track and lower-arc track, and open the revolving door. On the contrary, when the upper driving cylinder and the lower driving cylinder withdraw at the same time, there will occur pulling force with the door shaft as the fulcrum, which will drive the revolving door to revolve anticlockwise through the upper-arc track and lower-arc track, and close the revolving door. The piston rod connectors of the upper driving cylinder and the lower driving cylinder hinge in the upper-arc track and lower-arc track, the stressed point of which correspond to the moving track of the revolving door when revolving. There are bearing holes in the center of the rear flat globe of the upper driving cylinder and the lower driving cylinder, which is fixed in the support axle socket in the functional chamber by the support axle penetrating through bearing holes. When the upper driving cylinder and the lower driving cylinder intrude or withdraw, the rear end of the globe will revolve around the supporting shaft, matching with the track movement of the upper-arc track and lower-arc track. Thus the revolving door will revolve around the axis of the axle socket of upper door and the axle socket of lower door being opened or closed.

The second style is the combination way of steel cable, pulley and cylinder. There are fixed pulleys on the corresponding sides of the door shaft on the two ends of the revolving door, and the axle is installed vertically in the axle socket set on corresponding positions of the two ends of the revolving door. There are steering wheels on the fixed pulleys of each revolving door on the corresponding ends of the revolving door in the inner side of the functional chamber, the ends of the axle of which are installed in the axle sockets of the functional chamber, and there are bearings in the axle sockets.

Being fixed in the pulley groove by a buckle, the steel cable extends to the fixed pulley installed in the knobs of the piston rod of the bidirectional steering cylinder inside the functional chamber through the groove of corresponding fixed pulleys and steering wheels. The position elevation of the fixed pulleys installed on upper and lower end-faces of the revolving door interlace with each other in case that the steel cables of the pulleys collide. The steel cables have been fixed in the front end of multi-hole anchor with wedge valve (petal) before connecting with the piston rod of bidirectional steering cylinder. There is one cable led from the multi-hole anchor connecting with the fixed pulleys inside the knobs of the piston rod of bidirectional steering cylinder. The fixed pulleys and steering wheels are installed in the two sides of the steel cable, which will fix the steel cable in the pulley groove to avoid the derailment of the steel cable.

When the revolving door needs to be closed, the lower end of the bidirectional cylinder A on one side of the functional chamber withdraws and pull the steel cable connected with the knobs to move in the direction of retraction. Thus, the steel cable fixed on the pulleys on the upper end of the revolving door will be pulled and the revolving door will be driven to revolve around the axis of the axle socket of upper door and lower door. At the same time, the upper end of the bidirectional cylinder A protrudes and relaxes the steel cable that has been tightened before. Besides, the corresponding bidirectional cylinder B moves oppositely, that is, the piston rod on the lower end of the bidirectional cylinder B releases the steel cable, while the piston rod on the upper end of the bidirectional cylinder tightens the steel cable. The steel cable fixed on the fixed pulley in the lower end of the revolving door is pulled and close the revolving door coordinating with the bidirectional cylinder A. If the revolving door needs to be opened, the bidirectional cylinder in the functional chamber is operated oppositely, and the revolving door will be opened.

The beneficial effect of the invention is as followed:

(1) The invention device is beyond the range of time-and-apace construction method, the normal pressure stress occurred when squeezing into the soil is contrary to the direction of the relaxing stress of surrounding soil. The stress is used to resist the soil relaxing pressure, which turns the construction progress of underground project into an invisible supporting progress. Compared with the present construction method of supporting first and excavating then, the large preventing measures and cost in the first period will be nearly cancelled, which will save cost and shorten construction period, and reduce the risks of surface subsidence, declination and collapsing of buildings.

(2) The invention is especially suitable for urban underground complex pipe racks with geological conditions of soft soil, underground vehicle passages and BRIEF underground interchanges, which could be constructed without interruption.

DESCRIPTION OF THE DRAWINGS

FIG. 1 shows a longitudinal section of a guide body.

FIG. 2 shows a cross-sectional view along A-A line in FIG. 1.

FIG. 3 shows a cross-sectional view along B-B line in FIG. 1.

FIG. shows a cross-sectional view along E-E line in FIG. 1.

FIG. 5 shows a sectional view of a secondary cutter in the retracted state.

FIG. 6 shows a sectional view of a secondary cutter in the protruded state.

FIG. 7 shows a cross-sectional view along K-K line in FIG. 6.

FIG. 8 shows a schematic of a pneumatic impact hammer.

FIG. 9 shows an expanded view of a vibrating hole and inspection windows.

FIG. 10 shows a front view of a prestressed concrete chamber.

FIG. 11 shows a cross sectional view along C-C line in FIG. 1.

FIG. 12 shows a cross sectional view along D-D line in FIG. 1.

FIG. 13 shows a schematic of a two-level seal at the jointing point of a prestressed concrete chamber.

FIG. 14 shows a schematic of a connection of the rear end of the guide body and the front end of a prestressed concrete chamber.

FIG. 15 shows an enlarged view of sealing grooves and an elastic seal.

FIG. 16 shows an expanded view of a piston rod of a steering cylinder connected with a lug (double ear).

FIG. 17 shows a schematic of rotation by a lower driving cylinder on the bottom of the revolving door.

FIG. 18 shows a schematic of rotation by a upper driving cylinder on the top of the revolving door.

FIG. 19 shows a schematic of a revolving door pulled by a steel cable.

FIG. 20 shows a sectional view of a revolving door along the J-J line in FIG. 11.

FIG. 21 shows a sectional view of a multi-hole anchor device.

FIG. 22 shows a sectional view of an axle/shaft socket.

FIG. 23 shows a sectional view of a connection of piston rod and a curved/arc track.

In the Figures: 1. Soil-Squeezing chamber; 2. Shell wall; 2′ inner shell wall; 3. Reinforced/reinforcement plate; 4. Functional chamber; 5. Prestress concrete chamber; 6. Fan-shaped outlet; 7. Shoulder; 8. Bolt hole; 9. Bolt; 10. Revolving door; 11. Upper door axle socket/east; 12. Lower door axle socket/seat; 13. Fixing base for the main cutter; 14. Fixing base for the secondary cutter; 15. Gas-powered (air-powered) vibrator; 16. Air duct; 17. Vibrating plate; 18. Hole; 19. Step; 20. Elastic seal (or Sealing gasket); 21. pipe (tubing); 22. Air duct connector; 23. inspection window; 24. Inner cover plate; 25. Principle (main) lubricant duct; 25′ secondary lubricant duct; 26. Lubricant nozzle; 27. Guide plate; 28. Steering cylinder; 28′ Piston rod of steering cylinder; 29. Shaft (or shaft pin); 30. Jointing base (or connecting seat); 31. Boss; 32. Groove; 33. Hole (shaft hole); 34. Bumpy paneling jointing; 35. main cutter; 36. secondary cutter; 37. Impact hammer; 38. main drive (transmission) shaft; 39. secondary drive (transmission) shafts; 40. Transmission key; 41. Power unit; 42. Fixing frame; 43. Blade; 44. Horizontal thrust cylinder; 45. Piston rod of horizontal thrusting cylinder; 46. Air/gas cylinder; 47. Piston rod of air cylinder; 48. Door shaft; 49. Bidirectional cylinder B; 49′ Piston rod of bidirectional steering cylinder; 50. Upper arc (curved) track; 51. Lower arc (curved) track; 52. Upper driving cylinder; 52′ lower driving cylinder; 53. piston rod connecting head; 54. a flattened spherical body (a disk-like piece); 55. Bearing hole; 56. Support axle; 57. Support axle socket; 58. Fixed pulley; 59. Axle; 60. Axle socket; 61. Steering wheel; 62. Bearing; 63. Steel cable; 64. Shack; 65. Pulley groove; 66. Knobs; 67. Multi-hole anchor device; 68. Wedge-shaped locking petal (locking wedge).

DETAILED DESCRIPTION

Embodiments of the invention will be further illustrated in the following sections with reference to the drawings.

An embodiment of the invention comprises a guide body, a vibration system, a lubrication system, a guidance system, a cutting structure, and a gate/door. The vibration system is located on the four walls of the guide body. The lubrication system comprises lubrication pipes disposed along the four inner walls of the guide body and connected with corresponding nozzles. The guidance system is located in the front section of the four walls of the guide body. The cutting structure is located in the front section of the inner chamber of the guide body. The gate/door is located inside the guide body between the upper and lower walls.

As shown in FIGS. 1, 2, 5, 6, 7, 9, 10, 13, 14, and 15, the guide body comprises a soil-squeezing chamber 1, shell walls 2, a reinforcement panel 3, and a functional chamber 4. The soil-squeezing chamber 1 is designed as a chamber, having a certain length, width, and height. The soil-squeezing chamber 1 can be trapezoidal or cylindrical in cross-section shape with a smaller cross section area in the front than the cross-section area in the back. The shell wall 2 is constructed of two panels sandwiching the reinforcement panel 3 soldered therebetween to support each other, thereby forming a web of steel structure to increase the thickness and strength of the shall body.

The guide body comprises two sections: the front section and the back section. The front section comprises a cone-shaped soil-squeezing chamber 1. The back section comprises a functional chamber 4, which is connected to a prestressed concrete chamber 5. The functional chamber 4 is shaped as a hollow rectangular steel structure having a certain length. The front end of the functional chamber 4 has the same cross-sectional dimensions as the rear end of the soil-squeezing chamber 1. The rear end of the functional chamber 4 has the same cross-sectional dimensions as those of the front end of the prestressed concrete chamber 5. The prestressed concrete chamber 5 is a high-strength prestressed concrete structure with a hollow rectangular interior and a certain thickness and section length.

The front end of functional chamber 4 is in sealed connection with the rear end of the soil-squeezing chamber 1 via an elastic seal 20 set in the sealing trough 20′, wherein the elastic seal 20 is configurated not to cover bolt holes 8. The elastic seal 20 protrudes slightly above the sealing trough 20′ to contact sealing grooves 34, which has uneven surfaces, on the opposite contact component. Bolts 9 are used to press elastic seal 20 tightly against the sealing trough 20′, wherein the tops of bolts 9 are flush with the top surface of the sealing trough 20′, thereby reinforcing the sealing effects and preventing the elastic seal 20 from becoming leaky due to damages caused by strong compression force.

The connecting faces between the rear end of the functional chamber 4 and the prestressed concrete chamber 5 and between the two neighboring (front and back) prestressed concrete chambers 5 use elastic seals 20 embedded in the seal troughs 20′ located at the ends (along both horizontal sides and vertical sides) of the prestressed concrete chambers 5 to achieve tight seals.

A shoulder 7 is provided along the peripheral of the connection face between the soil-squeezing chamber 1 and the functional chamber 4. Bolt holes 8 are evenly provided along four sides of the shoulder 7 to facilitate the use of bolts 9 for connection. Inside the functional chamber 4, there is a chamber sufficiently large to accommodate a revolving door 10, upper door axle seat/socket 11, lower door axle seat/socket 12, a base/seat 13 for fixing the main cutter, a base/seat 14 for fixing the secondary cutter, power equipment 41, and a transmission structure. At the same time, the chamber in the functional chamber 4 plays a role in connecting the front and back components.

As shown in FIGS. 1, 2, 3, 4, 9, 10, 13, 14, and 15, the vibration system comprises a air-powered vibrator 15, an air duct 16, and a vibration plate 17. On each of the four walls of the soil-squeezing chamber 1 and the functional chamber 4, there is a hole/opening 18, which can be a rectangular or round and has a certain area. A step 19 is made on the inner edge of each opening 18. A seal 20 is placed on the step 19. A vibration plate 17 is pressed on the seal 20 and secured with bolts 9 on the step 19 in the opening 18. After installation, the surface of the vibration plate 17 is slightly higher than the surface of the shell wall 2. air-powered vibrators 15 are arranged on the inner wall of the vibration plate 17 at proper locations using bolts 9. An air duct 16 is arranged between the two plates of the shell wall 2 and connects with each air-powered vibrator 15. An inspection window 23 is provided at the location of the air-powered vibrator 15 and the connector 22. The inspection window may be used for installation and repair of the air-powered vibrator 15 and the connector 22. The inspection window 23 comprises an inner cover plate 24, which is secured with bolts 9 and seal 20 on the inner shell wall 2′. The air duct 16 delivers compressed air (or gas). The air-powered vibrator 15 makes the vibration plate 17 vibrate with a certain magnitude and vibration force that is transmitted to the soil in contact with the vibration plate 17, leading to desorption of soil from the guide body, thereby achieving reduction of side friction.

As shown in FIGS. 9, 10, 14, and 19, the lubrication system comprises a main lubricant duct 25, a secondary lubricant duct 25′, a lubricant nozzle 26, and a fan-shaped outlet 6. The main lubricant duct 25 is disposed between two plates of the shell wall 2 at an appropriate location. The outer end of the main lubricant duct 25 is connected to a lubricant pump, and the other end is connected with the secondary lubricant duct 25′. To facilitate inspection, repair, and installation, inspection windows 23 are provided around nozzles 26. The construction of inspection windows 23 is as described for the inspection windows for the vibration system.

At least one lubricant nozzle 26 is disposed at an appropriate location on the four walls of each of the soil-squeezing body 1, the functional chamber 4, and the prestressed concrete chamber 5. The nozzle 26 has an outer thread that is used to thread into inner thread on the walls of the shell wall 2 and the prestressed concrete chamber 5. The outlet of the nozzle 26 has a fan shape, the opening of which is in an opposite direction as the direction of the soil-squeezing and advancement to prevent the soil from clogging the outlet. A lubricant is prepared according to the soil conditions and pumped, using a slurry pump, through the main lubricant duct 25 and the secondary lubricant duct 25′ to the nozzle 26 to spray outwards, thereby a thin layer of liquid film of lubricant is formed on the guide body outside wall that contacts the soil, leading to reduction of friction between the shell and the soil.

As shown in FIG. 4, the guiding system comprises a guide plate 27, a steering canister 28, a shaft pin 29, a connecting seat 30, and a tubing/pipe 21. At least one guide plate 27 is installed at the front of each wall of the four walls of the soil-squeezing body 1. The rear end of the guide plate 27 has a boss 31. The boss 31 and a groove 32 are provided with a shaft hole 33 at the center thereof. The boss 31 is inserted into the groove 32 so that the shaft hole 33 is concentric, and the shaft pin 29 is inserted into the shaft hole 33 in sections, so that the boss 31 of the guide plate 27 and the groove 32 of the squeezing cavity 1 are hingedly connected.

At least one steering cylinder 28 corresponding to each of the guide plates 27 is disposed in a position corresponding to the guide plate 27 between the two plates of the soil-squeezing chamber 1. The steering cylinder 28 is driven by hydraulic pressure delivered by the pipe 21. The steering cylinder piston rod 28′ front end is provided with a shaft hole 33, at a position corresponding to the guide plate 27, and is hingedly connected, via a shaft pin 29, to a connecting seat 30 located in between the two plates of the soil-squeezing chamber 1. The steering cylinder piston rod 28′ is extended or retracted to drive the guide plate 27 to rotate around the shaft pin 29, thereby changing an angle of the guide plate 27 within an appropriate range. Between two plates of the guide plates 27 is provided with at least one connecting seat 30 for hingedly connecting the steering cylinder piston rod 28′. The guide plates 27 corresponding to the left and right sides of the vertical direction form a left-and-right steering group, and the horizontally upper and lower corresponding guide plates 27 form an up-and-down steering group. Each group is hingedly connected to the corresponding steering cylinder piston rod 28′ shaft hole 33. When the vertical group steering cylinder piston rod 28′ is extended or retracted, the corresponding horizontal steering cylinder piston rod 28′ is retracted or extended (i.e., in the opposite direction), which causes the connecting seat 30 of the guide plate 27 to move synchronously to drive the guide plate 27 to rotate, via the boss 31 and the groove 32, around the shaft pin 29 in the corresponding direction (i.e., to change the angle to the left or right).

Similarly, the extension or contraction in the horizontal direction of the upward steering cylinder rod 28′, while with the corresponding downward steering cylinder piston rod 28′ move in the opposite direction (i.e., retraction or extension), leading to movement of the connection seat 30 that causes the guide plate 27 to rotate around the shaft pin 29 to change the angle upward or downward, thereby achieving the adjustment of the traveling direction of the soil-squeezing chamber 1 within an appropriate angle range.

As shown in FIGS. 1, 2, 3, 5, 6, 7, and 8, the cutting mechanism comprises a main cutter 35 (or main cutter disc), a secondary cutter 36, a hard rock impact hammer 37, a main drive shaft 38, a secondary drive shaft 39, a transmission key 40, a power unit 41, and a fixed frame 42. The main cutter 35 includes blades 43, the main drive shaft 38, and the power unit 41. The main cutter 35 has a circular shape and is located at the front end of the soil-squeezing chamber 1. The front-end surface of the main cutter 35 is retracted by a slight distance from the front-end surface of the guide plate 27. At least one main cutter 35 is installed depending on the cross-sectional dimension of the soil-squeezing chamber 1. The front-end surface of the main cutter 35 is equipped with blades 43 having different angles intermittently arranged (spaced apart) thereon. The main cutter 35 is connected to the power unit 41 in the rear via the main drive shaft 38. The power unit 41 drives the main drive shaft 38 to drive the main cutter 35 to generate a large torque. The power unit 41 may be a hydraulic motor.

At least one secondary cutter 36 is disposed in the hollow part between the main cutter 35 and the side frame at the front end of the soil-squeezing chamber 1. The front-end surface of the secondary cutter 36 is also provided with blades 43 having different angles discontinuously (intermittently) arranged thereon. The secondary cutter 36 is connected, via transmission key 40, with the secondary transmission shaft 39 of the power unit 41. The power unit 41 passes the rotation torque to the drive shaft 39, which in turn transmits the torque to the drive key 40 fixed to the center portion of the secondary cutter 36, thereby driving the secondary cutter disc 36 to rotate synchronously to perform cutting of the soil. The secondary drive shaft 39 is provided with a longitudinal cavity, and a horizontal thrust cylinder 44 is mounted along the longitudinal cavity. The horizontal thrust cylinder piston rod 45 and the rear end of the secondary cutter 36 are hingedly connected via a shaft pin 29. The horizontal thrust cylinder rod 45 extends or retracts to drive the transmission key 40, which is fixed to the secondary cutter 36, to move along the secondary transmission shaft 39 key groove. The movement causes the secondary cutter head 36 to achieve axial displacement within a certain distance, thereby achieving the purpose of adjusting the distance and pressure between the secondary cutter 36 and the soil up front, and changing the cutting amount and cutting progress. The blades 43 provided on front surfaces of the main cutter 35 and the secondary cutter 36 mainly function to rapidly cut the soil and are not easily wrapped by the soil or filled between the gaps of the blades 43 by the soil as to lose the cutting function.

The main drive shaft 38 and the secondary drive shaft 39 are respectively connected to the power unit 41. The power unit 41 is fixed to a fixing frame 42 in the functional chamber 4 and has sufficient strength to ensure its stability. At the tangential gap between the main cutter 35 and the secondary cutter 36, a pneumatic impact hammer 37 is also provided, and the pneumatic impact hammer 37 is driven in the same manner as the secondary cutter 36, but a gas/air cylinder 46 instead of a fluid cylinder is used for the power. The pneumatic impact hammer 37 is not involved in the work and is retracted under normal circumstances. When a rock or rock interlayer is encountered, a high-pressure gas is input to extend the gas cylinder piston rod 47 to push the pneumatic impact hammer 37 forward beyond the main cutter head 35 and the secondary cutter 36 by a certain distance. Then, the pneumatic impact hammer 37 is operated to gradually smash the hard rock, to avoid embarrassing situation wherein the squeeze-in process is interrupted.

As shown in FIGS. 11, 12, 15, 16, 17, 18, 19, 20, 21, 22, and 23, the gate comprises a revolving door 10, an upper door shaft seat 11, a lower door shaft seat 12, a door shaft 48, a bidirectional cylinder, an upper curved (arc) track 50, a lower curved track 51, a driving cylinder, a driving steering cylinder piston rod connecting head 53, a tail flat spherical body 54, a support shaft hole 55, a support shaft 56, a support shaft seat 57, a fixed pulley 58, a wheel axle 59, a wheel axle seat 60, a guide wheel 61, a bearing 62, a cable 63, a buckle 64, a pulley groove 65, the ears 66, a multi-hole anchor 67, and wedge-shaped locking flaps 68. The revolving door 10 is a rectangular steel structure with a certain thickness, which comprises a mesh-shaped reinforcing plate 3 welded between two door plates.

At least one revolving door 10 is installed in each function chamber 4. A cylindrical door shaft 48 is fixed vertically at the center of the revolving door 10. The upper end of the door shaft 48 is disposed inside an upper door shaft seat/socket 11, and the lower end of the door shaft 48 is installed in a lower door shaft seat/socket 12. The axial center of the upper door shaft seat 11 and the lower door shaft seat 12 are located at the center of the door.

There are two ways to drive the revolving door 10 to open and close. The first method is a hydraulic cylinder push type: an upper curved rail 50 is provided with a clockwise trajectory on the side of the revolving door 10 corresponding to the lower door shaft seat 12, and a lower curved track 51 with a counterclockwise trajectory is provided at the bottom of the revolving door 10 on the other side corresponding to the top curved track 50. The piston rod connecting head 53 of an upper driving cylinder 52 is embedded in the upper curved track 50, and the piston rod connecting head 53 of a lower driving cylinder 52′ is embedded in the lower curved track 51 by inserting a shaft pin 29 to form a hinged connection. The upper driving cylinder 52 and the lower driving cylinder 52′ have their piston rods protruding in opposite directions, and the contraction directions are in the opposite directions. The upper driving cylinder 52 and the lower driving cylinders 52′ are respectively disposed at appropriate positions corresponding to the guiding inner walls of the upper curved track 50 and the lower curved track 51. When the upper driving cylinder 52 extends, the piston rod connecting head 53 pushes the upper curved track 50 and drives the revolving door 10 to rotate in the clockwise direction, while the lower driving cylinder 52′ also synchronously extends and pushes the lower curved track 51 to drive the revolving door 10 to also rotate in the clockwise direction. Because the upper driving cylinder 52 and lower driving cylinder 52′ are disposed on the revolving door 10 at corresponding locations at upper and lower portions, simultaneous extension of them produces a bilateral lever thrust action with the lower door shaft seat 12 as a fulcrum, thereby the rotary door 10 is pushed to open by rotating in a clockwise direction along the upper curved track 50 and the lower curved track 51. Conversely, when the upper driving cylinder 52 and the lower driving cylinder 52′ simultaneously contract, the bilateral lever pulling force is generated to drive, with the door shaft seat 12 as a fulcrum, the upper curved track 50 and the lower curved track 51 to pull the door 10 to rotate in the counterclockwise direction to close. The upper driving cylinder 52 and the lower driving cylinder 52′ have their piston rod connecting heads 53 hinged in the upper curved track 50 and the lower curved track 51 such that their force exertion points, during rotation, always follow the arc-movement track of the rotation door 10. A support shaft hole 55 is formed at the center of the flat spherical body 54 of the upper drive cylinder 52 and the lower drive cylinder 52′. A support shaft 56 is inserted through the support shaft hole 55 to position it in the support shaft seat 57 at the corresponding position of the functional chamber 4. When the upper drive cylinder 52 and the lower driving cylinder 52′ extend or contract, the rear end thereof can be rotated correspondingly around the supporting shaft 56 to cooperate with the trajectory movement of the upper curved rail 50 and the lower curved rail 51, thereby allowing the revolving door 10 to rotate freely around the axle of the door shaft seat 11 and the lower door shaft seat 12 when closing or opening.

As shown in FIGS. 11, 12, 16, 19, 20, 21, and 22, the second method is based on a steel cable pulley and cylinder combined transmission mode: a fixed pulley 58 is disposed at a corresponding position on the upper and lower end faces of the rotary door 10, and an axle 59 extends vertically into the axle seat 60 disposed at corresponding positions on both ends of the rotary door 10. A guide wheel 61 is provided on the inside of each of the upper and lower walls of the functional chamber 4 at locations corresponding to the front and rear ends of the revolving door 10 and corresponding to the locations of the pulleys 58 on the revolving doors 10. The ends of the axle 59 are inserted into the upper and lower axle seats 60 in the functional chamber 4. A bearing 62 is disposed in the axle seat 60. A cable 63 is fixed in the pulley groove 65 by a buckle 64 and is restrained by the corresponding pulley 58 and the pulley groove 65 of the guide wheel 61 to extend to the pulley 58 fixed between two ears 66 at two ends of the two-way steering cylinder piston 49′ installed on the vertical side walls of the functional chamber 4. The cable is also locked securely using the buckles 64 to form an upper and lower associated drive mechanism. In order to prevent the pulleys 63 from colliding with each other, the elevation positions of the fixed pulleys 58 on the upper and lower ends of the revolving door 10 are correspondingly staggered. The cable 63 is passed successively through the wedge-shaped locking petals 68 before being connected with the two-way steering cylinder piston rod 49″. The wedge-shaped locking petals 68 are locked at the front end of a multi-hole anchor 67. The cable leads out from the rear end of the multi-hole anchor 67 to connect to the pulley 58 fixed between the two ears 66 on the two-way steering cylinder piston rod 49″. The fixed pulley 58 and the guide wheel 61 are respectively disposed on the corresponding two sides of the steel cable 63, forming a restraint for holding the steel cable 63 in the corresponding pulley groove 65, thereby effectively preventing the interruption or failure caused by the cable 63 being derailed during operation.

As shown in FIGS. 11, 12, and 19, when the revolving door 10 needs to be closed, the lower end of the bidirectional cylinder A 49 on one side of the functional compartment 4 is retracted to pull the cable 63, which is connected to the lug 66, to move in the retraction direction, so that the cable 63 fixed to the upper end pulley 58 of the revolving door 10 rotate the revolving door 10 in the moving direction around a central axis between the upper door shaft seat 11 and the lower door shaft seat 12. At the same time, the upper end of the two-way cylinder A 49 is extended, and the originally tensioned steel wire 63 is synchronously relaxed. Moreover, the corresponding two-way cylinder B 49′ also synchronously performs the opposite movements. That is, the upper end is contracted to tighten the cable 63, and the lower end is extended by the loosening cable 63, thereby pulling the cable 63 on the pulley 58 fixed at the lower end of the revolving door 10 from the opposite direction. The cable 63 moves in cooperation with the two-way cylinder A 49 to synchronously pull the revolving door 10 to close. When the revolving door 10 needs to be opened, the bi-directional cylinders in the function chamber 4 are operated in the opposite motions to open the revolving door 10.

Of course, the above description shows preferred embodiments of the invention and should not be regarded as limiting the scope of the invention. Embodiments of the invention are not limited to the above examples. One skilled in the art would realize that modifications or improvements of these examples within the substance of the invention would still fall within the scope of the invention.

Claims

1. A soil-squeezing device for underground project, comprising: conductor, vibration system, lubrication system, guidance system, cutting structure and sluice. The vibration system is located in the four inner walls of the conductor. The lubrication system is located in the lubrication pipes along the four inner walls of the conductor and connected with the lubrication nozzle in proper positions. The guidance system is located in the four inner walls on the front end. The cutting structure located in the front end of inner cavity of the conductor, and the sluice is located in the function chamber of the conductor.

2. The soil-squeezing device for underground project according to claim 1, wherein the mentioned conductor includes squeezing chamber (1), shell integuments (2), reinforcing plate (3) and function chamber (4). The squeezing chamber (1) is a trapezoid-shaped or cone-shaped hollow cavity with certain length, width and height, and the projecting area of the front end of the squeezing chamber is less than the back end. The shell integument (2) is a grid steel structure which is made of two layers of panels, and between which a reinforced board (3) is added so as to strengthen the thickness and strength of the shell. The conductor includes front and back parts. The front part is the trapezoid-shaped or cone-shaped squeezing chamber (1), and the back part is the function chamber (4) connecting with the prestress concrete cavity (5). The function chamber (4) is a hollow rectangle steel structure with certain length. The front part of the function chamber (4) is the same as the outer size of the back end of the squeezing chamber, and the back part is the same as the size of the front part of prestress concrete cavity (5). The prestress concrete cavity (5) is a hollow rectangle prestressed concrete part with certain wall thickness and section length, and extra sections can be connected to prolong the cavity. The interface of the front end of the function chamber (4) and the back end of the squeezing chamber (1) uses flexible sealing gasket (20), and is put into the sealing groove (20′) which is specially designed by avoiding the positions of bolt holes (8). The flexible sealing gasket (20) bulges a little above the top surface of the sealing groove (20′), and the connecting point adopts bumpy paneling jointing (34) method. The bulging surface of the flexible sealing gasket (20) is fastened to the top surface of the sealing groove (20′) when fastening the bolt (9) so as to strengthen sealing effect. The joint datum of back end of the function chamber (4) and the prestress concrete cavity (5) and the vertical plane and horizontal plane of the joint datum of the front and back prestress concrete cavity (5) adopt flexible sealing gasket (20), and is inserted in the sealing groove of vertical plane (20′) and horizontal plane (20′) of the prestress concrete cavity (5). Thus two-level sealing is realized on the jointing point. There is a shoulder (7) along the perimeter of the shell on the jointing point of the squeezing chamber (1) and function chamber (4) and there are bolt holes (8) along the surroundings of the shoulder and connected by bolts (9). There is enough space for installing revolving door (10), upper axle base of door (11), lower axle base of door (12), big disc cutter base (13), small disc cutter base (14), power equipment (41) and transmission opponents in the function chamber.(4)

3. The soil-squeezing device for underground project according to claim 1, wherein the mentioned vibrating system includes gas source vibrator (15), air duct (16) and sheet for vibration (17). There are rectangle or circular holes (18) with certain areas in appropriate positions in the squeezing chamber (1) and the four walls of the function chamber (4). The edges inside the holes (18) are steps (19), and there are sealing gaskets (20) on the surface of the steps (19). The sheet for vibrations (17) are pressed on the sealing gaskets (20) and installed on the steps (19) inside the holes (18) by bolts (9), the outer surface is a little higher than the outer surface of the shell integuments (2) after the sheet for vibration (17) is installed. The gas source vibrator (15) is installed in appropriate positions on the bottom of the sheet for vibration (17) by bolts (9), which is connected with the other gas source vibrators (15) along the air ducts (16) between the plates of the shell integuments (2). There are checking holes (23) on the jointing parts of gas source vibrators (15) and air ducts (22), which is used for installing and repairing the joints of air ducts (22) and gas source vibrators (15). The checking windows(holes preserved for checking) (23) adopt inner cover plates (24) and are blocked by screwing hard with the inner walls of the shell (2′) through bolts and sealing gaskets (20). By pumping into high-pressure gas through the air duct (16), the vibrator's amplitude and exciting force on the sheet for vibration (17) are spread to the sand sticking to the sheet for vibration (17), and reduce the friction by destroying the conductor's electrostatic adsorption effect caused by sand.

4. The soil-squeezing device for underground project according to claim 1, wherein the lubrication system includes lubrication pipes (25), lubrication nozzles (26) and fan-shaped exit (6). The principle lubrication pipe (25) is installed in appropriate positions between the two planes of the shell integument (2), and the outer end of which connects with lubricant pump, and is connected with the principle lubrication pipe (25′) along the extending direction of the principle lubrication pipe (25) on the position of the lubrication nozzle (26). There are checking holes (23) in the lubrication nozzle (26) for checking and connecting, and the structure and installing method of which are the same as the checking holes of vibrating system (23). There is at least one lubrication nozzle (26) in appropriate positions in the four inner walls of the squeezing chamber (1), the function chamber (4) and the prestressing concrete cavity (5). There is outer thread on lubrication nozzles (26), which could be screwed tightly with inner thread of the walls of the shell (2) and the walls of prestressing concrete cavity (5). The outlet of the lubrication nozzle (26) is fan-shaped, and the direction of the fan-shaped exit (6) is on the contrary to the squeezing direction in case of being blocked. The lubricant modulated according to the land conditions will be sprayed from the lubrication nozzle (26) through principle lubrication pipes (25) and subsidiary pipes (25′) by mud pump, and a thin layer of liquid separator is formed in the interface between the sand and walls of conductors.

5. The soil-squeezing device for underground project according to claim 1, wherein the mentioned guidance system includes director plates (27), steering cylinders (28), shafts (29), connecting sockets (30) and oil pipes (21). There is at least one director plate (27) on each wall of the front end of the squeezing chamber (1), and there is a boss (31) on the back end of the director plate (27). There are grooves (32) on the front end of the squeezing chamber (1) walls, and there are bearing holes in the center of grooves and bosses. The bosses should insert the grooves and the shafts should insert the bearing holes, thus, the bosses of the director plate will hinge together with the grooves of the squeezing chamber. There is a matching steering cylinder on appropriate position inside the walls of the squeezing chamber, which is driven by transporting hydraulic oil through oil pipes. The piston rod of the steering cylinder hinges with the connecting socket of the director plate by shafts, and propels the director plate to change in certain angles. There is at least one connecting socket (30) in the shell of a director plate (27), which is used for hinging for the piston rod (28′) of the steering cylinder, and is connected with at least one steering cylinder put on the appropriate positions in the piston rod (28′) and the squeezing cabin (1). The director plates (27) on the left and right side are left-and-right steering team, and the director plates on the upper and lower side is up-and-down steering team. Each team hinges with related bearing holes (33) of the piston rods of steering cylinders (28′). When the piston rod of the steering cylinder (28′) on the vertical side protrudes or withdraws, the counterpart will react oppositely, which will drive the connecting socket (30) of the director plate (27) to move synchronously. Thus the director plate (27) will rotate around the shaft (29) through the bearing holes (33) of the boss (31) and the grooves (32), and there will occur angle changes towards the left or right side. As the same, the piston rod (28′) of the horizon steering cylinders protrudes or withdraws, the counterpart (28′) will also withdraw or protrudes oppositely. The director plate (27) of the connecting socket (30) will be driven to rotate around the shaft (29) in certain angles, thus the horizontal moving position of the squeezing chamber (1) is adjusted in appropriate angles.

6. The soil-squeezing device for underground project according to claim 1, wherein the mentioned cutting structure includes big disc cutters (35), small disc cutters (36), hard rock hammers (37), principle transmission shafts (38), secondary transmission shafts (39), transmission keys (40), power devices (41) and fixing frames (42). The big disc cutter (35) includes cutting blade (43), principle transmission shaft (38) and power device (41). The big disc cutter (35) is circular, lying in the front end of the squeezing chamber (1). The front end-face of the big disc cutter (35) is a little behind of the front end-face of the director plate (27). There is at least a big disc cutter (35) according to the size of the cross section of the squeezing chamber (1). There are blades (43) at intervals with different angles on the front end-face of the big disc cutter (35). The back end of the big disc cutter (35) connects with power device (41) on the back end by principle transmission shaft (38), and the power device (41) will drive the principle transmission shaft (38), thus the big disc cutter (35) will be driven and produce giant torque. The power device (41) adopts hydraulic motors. There is at least a small disc cutter (36) on the hollow part between the big disc cutter (35) and the frame of the front end of the squeezing chamber (1). There are also blades (43) at intervals with different angles on the front end-face of the small disc cutter (36). The small disc cutter (36) is sleeve-jointed with the keyway of the secondary transmission shaft (39) connecting with the power device (41) by the transmission key (40). Through the secondary transmission shaft, the power device (41) passes the rolling torque to the transmission key (40) fixed in the center of the back end of the small disc cutter (36), thus the small disc cutter (36) is driven to rotate and cut the soil. There are vertical holes in the axis of secondary transmission shaft (39), and there are horizontal thrusting cylinders (44) along the vertical holes. The piston rod (45) of the horizontal thrusting cylinder is hinged by shafts (29) with the back end of the small disc cutter (36). That the piston rod (45) of the horizontal thrusting cylinder protrudes or withdraws will drive the transmission key (40) connected with the small disc cutter (36) to move along the keyway of the secondary transmission shaft (39), and axial displacement will occur to the small disc cutter (36) in certain distance. Thus the purpose of adjusting the distance and pressure of the small disc cutter (36) and the soil ahead will be realized. The principle transmission shaft (38) and the secondary transmission shaft (39) are separately connected with the power device (41), which is installed on the fixing frame (42) of the function chamber (4). There are air driven hammers (37) in the space between the big disc cutter (35) and secondary cutter (36), the driving method of which is the same as that of the small disc cutter (36). But the hammers use air cylinders (46) as power rather than oil cylinders. Under common circumstance, the air driven hammer (37) lies in the rear and does not work. When there are stones or rock interlayers, high-pressure air could be input and the piston rod (47) of the cylinder intrudes and pushes the air driven hammer (37) forward ahead of the big disc cutter (35) and the secondary cutter (36), then the air driven hammer (37) is started and breaks the rocks avoiding the embarrassing situation of interrupting squeezing.

7. The soil-squeezing device for underground project according to claim 1, wherein the mentioned sluice includes revolving door (10), axle base of upper door (11), axle base of lower door (12), door shaft (48), two-way cylinder, upper-arc rail (50), lower-arc rail (51), driving cylinder, piston rod connector of driving steering cylinder (53), rear flat globe (54), bearing hole (55), support axis (56), support shaft (57), standing pulley (58), axle (59), axle base (60), guide wheel (61), bearing (62), steel cable (63), horn cheat (64), pulley groove (65), knobs (66), multi-hole anchorage device (67) and wedge valve (68). The revolving door (10) is a rectangle steel structure (3) with certain thickness, which is made up of two door plates between which there is a grid reinforcing plate. There is at least a revolving door (10) in each function chamber (4). There is a circular door shaft (48), being fixed with the revolving door (10). The upper end of the shaft (48) is installed in the axle base of upper door (11), and the lower end is installed in the axle base of lower door (12), and the center of the axle bases of upper door and the lower door corresponds exactly with each other.

8. The soil-squeezing device for underground project according to claim 7, wherein the revolving door (10) is driven by cylinders. There is an upper-arc rail (50) clockwise on the top of the revolving door (10) by the side of door shaft (48), and there is a lower-arc rail anticlockwise (51) at the bottom of the revolving door on the opposite side. The piston rod connector of the working cylinder A (52) is embedded into the upper-arc rail (50), and the piston rod connector of the working cylinder B (52′) is embedded into the lower-arc rail (51), and a shaft (29) is used for hinging. The protrusion and withdrawing directions of the piston rod of the working cylinder A (52) and the working cylinder B (52′) make relative motions. The working cylinder A (52) and the working cylinder B (52′) are installed on appropriate positions in the inner walls of the conductor of upper-arc rail (50) and lower-arc rail (51). When the working cylinder A (52) protrudes, its piston rod connector (53) will push the upper-arc rail (50) and drive the revolving door (10) to revolve clockwise, and the working cylinder B (52′) will also protrude and push the working cylinder B (52′) and drive the revolving door (10) to revolve clockwise. As the working cylinder A (52) and the working cylinder B (52′) protrude at the same time on the upper and lower end of the revolving door, there will occur impelling force with the door shaft (48) as the fulcrum, which will drive the revolving door to revolve clockwise through the upper-arc rail (50) and lower-arc rail, and open the revolving door (10). On the contrary, when the working cylinder A (52) and the working cylinder B (52′) withdraw at the same time, there will occur pulling force with the door shaft (48) as the fulcrum, which will drive the revolving door to revolve anticlockwise through the upper-arc rail (50) and lower-arc rail (51), and close the revolving door (10). The piston rod connectors of the working cylinder A (52) and the working cylinder B (52′) hinge in the upper-arc rail (50) and lower-arc rail (51), the stressed point of which correspond to the moving track of the revolving door (10) when revolving. There are bearing holes (55) in the center of the rear flat globe (54) of the working cylinder A (52) and the working cylinder B (52′), which is fixed in the support shaft (57) in the function chamber (4) by the support axis (56) penetrating through bearing holes (55). When the working cylinder A (52) and the working cylinder B (52′) intrude or withdraw, the rear end of the globe will revolve around the supporting shaft (56), matching with the track movement of the upper-arc rail (50) and lower-arc rail (51). Thus the revolving door (10) will revolve around the axis of the axle base of upper door (11) and the axle base of lower door (12) being opened or closed.

9. The soil-squeezing device for underground project according to claim 7, wherein the revolving door (10) adopts the transmission way of the combination of steel cable, pulley and cylinder. There are standing pulleys (58) on the corresponding sides of the door shaft (48) on the two ends of the revolving door (10), and the axle (59) is installed vertically in the axle base (60) set on corresponding positions of the two ends of the revolving door (10). There are guide wheels (61) on the standing pulleys (58) of each revolving door (10) on the corresponding ends of the revolving door (10) in the inner side of the function chamber (4), the ends of the axle (59) of which are installed in the axle bases (60) of the function chamber (4), and there are bearings (62) in the axle bases (60), being fixed in the pulley groove (65) by the horn cheat (64), the steel cable (63) extends to the standing pulley (58) installed in the knobs (66) of the piston rod of the bidirectional steering cylinder inside the function chamber (4) through the groove (65) of corresponding standing pulleys (58) and guide wheels (61), the position elevation of the standing pulleys (58) installed on upper and lower end-faces of the revolving door (10) interlace with each other in case that the steel cables of the pulleys collide. The steel cables have been fixed in the front end of multi-hole anchorage device (67) with wedge valve (68) before connecting with the piston rod (49′) of bidirectional steering cylinder. There is one cable (63) led from the multi-hole anchorage device (67) connecting with the standing pulleys (58) inside the knobs (66) of the piston rod (49′) of bidirectional steering cylinder. The standing pulleys (58) and guide wheels are installed in the two sides of the steel cable (63), which will fix the steel cable (63) in the pulley groove (65) to avoid the derailment of the steel cable (63).

10. The soil-squeezing device for underground project according to claim 9, wherein when the revolving door (10) needs to be closed, the lower end of the bidirectional cylinder A (49) on one side of the function chamber (4) withdraws and pull the steel cable connected with the knobs (66) to move in the direction of withdrawing. Thus the steel cable (63) fixed on the standing pulleys (58) on the upper end of the revolving door (10) will be pulled and the revolving door (10) will be driven to revolve around the axis of the axle base of upper door (11) and lower door. At the same time, the upper end of the bidirectional cylinder A (49) protrudes and relax the steel cable (63) that has been tightened before. Besides, the corresponding bidirectional cylinder B (49′) moves oppositely, that is, the piston rod (49′) on the lower end of the bidirectional cylinder B releases the steel cable (63), while the piston rod (49′) on the upper end of the bidirectional cylinder tightens the steel cable. The steel cable (63) fixed on the standing pulley (58) in the lower end of the revolving door (10) is pulled and close the revolving door (10) coordinating with the bidirectional cylinder A(49). If the revolving door (10) needs to be opened, the bidirectional cylinder in the function chamber (4) is operated oppositely, and the revolving door (10) will be opened.