Patent Application
20050086790
1. Field of the Invention
The present invention relates to a press-in apparatus for a Z profile sheet pile comprising a press-in section for grasping a Z profile sheet pile having clutches at both end portions to press in, and a press-in method of a Z profile sheet pile.
2. Description of the Related Art
Generally, a pile press-in apparatus which can press a pile in or extract a pile by utilizing reaction force from a pile which has already been pressed in has been known. Earlier, a pile press-in apparatus comprises a saddle having a plurality of clamp parts for clamping top portions of piles which are pressed in the ground in line, a slide frame provided to be slidable back and forth to the saddle, a mast which is rotatably provided on the slide frame, and a chuck section which is provided on a front surface of the mast to be slidable up and down and comprises a chuck for grasping and holding a pile which is to be pressed in or to be extracted.
The slide frame is extended forward in a state of clamping piles which were pressed in the ground in a line by the clamp parts to support the saddle on the piles. A pile forward of the piles pressed in the ground is grasped and held by the chuck of the chuck section. The pile press-in apparatus presses the pile grasped and held by the chuck section in, in a state of receiving reaction force from the pressed-in piles which are clamped by the clamp parts. After releasing the piles clamped by the clamp parts, the clamp parts and the saddle are raised. The slide frame is shortened to pull the saddle to the chuck section side. The above operations are repeated, so that the pile press-in apparatus is capable of self-walking on the piles which are pressed in the ground in a line.
A pile is pressed in the ground while the pile press-in apparatus performing self-walking, and the slide frame is slid back and forth to the saddle. Thus, the chuck section presses two piles in back-and-forth directions.
The pile press-in apparatus can be applied to a steel pipe sheet pile, an H profile sheet pile, a Z profile sheet pile, a straight steel sheet pile, a concrete sheet pile or the like other than the above pile.
The Z profile sheet pile denotes, for example, a sheet pile 7 as shown in
When pressing the Z profile sheet piles 7 in, the fixed jaw 103 and the movable jaw 104 grasp and hold the Z profile sheet pile 7, and the chuck section 101 is rotated to change the direction of the Z profile sheet piles 7 one by one in right-and-left directions-to join the Z profile sheet piles 7 alternately at the clutches 73. Accordingly, a continuous wall (see, for example, Japanese Application Patent Laid-Open Publication No. 2002-294691) can be structured.
However, in the above method, since the Z profile sheet piles are pressed in one by one, the stiffness is low. Thus, there is a problem that it is difficult to stably press the Z profile sheet pile in and construction accuracy becomes low.
Also, after a Z profile sheet pile was pressed in, it is required to rotate the chuck section before pressing a next Z profile sheet pile in. Thus, it takes a long time to carry out a press-in operation. Moreover, since the Z profile sheet piles are pressed in one by one, the pitch to be constructed is short. Thus, the cost for construction per meter becomes high.
The present invention has been developed in view of the above circumstances, and an object of the present invention is to provide a press-in apparatus for the Z profile sheet pile and press-in method of the Z profile sheet pile, in which construction can be stably carried out with high accuracy in a state where the Z profile sheet piles have high stiffness, and which can reduce the working hours and cost.
In the first aspect of the invention, as shown in
According to the invention, since two Z profile sheet piles are pressed in at a time in a state where the two Z profile sheet piles are joined each other at the clutches thereof, the Z profile sheet piles can be stably pressed in the ground in a state of having high stiffness in comparison to the earlier technique where Z profile sheet piles are pressed in one by one. Thus, the construction can be carried out with high accuracy.
Moreover, pressing the two Z profile sheet piles in at a time can realize the reduction of press-in work and the long pitch for construction at a time. Thus, the cost for construction can be reduced.
Preferably, as shown in
According to the invention, the grasping mechanism grasps the two Z profile sheet piles individually to press in, the Z profile sheet piles can be pressed in one by one alternately.
Thus, for example, when pressing the Z profile sheet piles in, even if the toe resistance by cobbles or gravels to the Z profile sheet piles are high, the area to receive the toe resistance becomes half by pressing the Z profile sheet piles in one by one. Therefore, the toe resistance can be reduced. Thus, the deformation of the Z profile sheet pile can be prevented, thereby making the press-in easy.
Preferably, for example as shown in
According to the invention, the grasping mechanism grasps each of the end portions of the two Z profile sheet piles which is opposite side of the clutches at which the two Z profile sheet piles are joined each other. That is, the grasping mechanism grasps a portion near the forefront of the joined two Z profile sheet piles in a direction of movement of the press-in apparatus. Thus, the Z profile sheet piles can be controlled easily and pressed in with high accuracy.
This configuration can provide a compact press-in apparatus in view of the strength of the Z profile sheet piles. Moreover, for example, an auger apparatus or a jet hose (pipe) can be disposed in the convexities which are formed by joining two Z profile sheet piles, so that a simultaneous press-in method can be carried out.
Preferably, for example as shown in
According to the invention, the plurality of clamp parts clamp each joint part of clutches of the Z profile sheet piles. Thus, for example, when four clamp parts are provided, they clamp five pressed-in Z profile sheet piles. Therefore new Z profile sheet piles can be pressed in stably with high accuracy by receiving reaction force from the five Z profile sheet piles. Since the plurality of clamp parts clamp each joint part of the Z profile sheet piles, the clamp parts are not arranged in line in the back-and-forth directions but are arranged alternately on right and left sides seen from the back-and-forth directions. Thus, the inclination of the press-in section supported by the clamp parts in lateral direction can be prevented.
Preferably, the press-in method for pressing a Z profile sheet pile in, comprises the step of:
According to the invention, the two Z profile sheet piles are pressed in at a time in a state where the two Z profile sheet piles are joined each other at the clutches thereof by using the press-in apparatus for a Z profile sheet pile, the Z profile sheet piles can be stably pressed in the ground in a state of having high stiffness in comparison to the earlier technique where Z profile sheet piles are pressed in one by one. Thus, the construction can be carried out with high accuracy.
Moreover, pressing the two Z profile sheet piles in at a time can realize the reduction of press-in work and the long pitch for construction at a time. Thus, the cost for construction can be reduced.
In the press-in method of a Z profile sheet pile, when pressing the two Z profile sheet piles in at a time, the two Z profile sheet piles may be pressed in alternately one by one through a plurality of steps in a state of maintaining the two Z profile sheet piles to be joined each other at the clutches thereof.
According to the invention, when pressing the two Z profile sheet piles in at a time, since the two Z profile sheet piles are pressed in alternately one by one through the plurality of steps in a state of maintaining the two Z profile sheet piles to be joined each other at the clutches thereof, the Z profile sheet piles can be stably pressed in without the Z profile sheet pile on the front side blurs, and the construction can be carried out with high accuracy in comparison with the case where the two Z profile sheet piles are pressed in at a time through the plurality of steps.
According to the press-in apparatus for the Z profile sheet pile and the press-in method of the Z profile sheet pile in the present invention, the two Z profile sheet piles are pressed in at a time in a state where the two Z profile sheet piles are joined each other at the clutches thereof. Thus, the construction can be stably carried out with high accuracy in a state where the Z profile sheet piles have high stiffness, and which can reduce the working hours and cost.
The present invention will become more fully understood from the detailed description given hereinafter and the accompanying drawings which are given by way of illustration only, and thus are not intended as a definition of the limits of the present invention, and wherein;
Hereinafter, the preferred embodiments of the present invention will be described in detail by reference to the attached drawings.
The embodiment will be explained with a press-in apparatus for a Z profile sheet pile (hereinafter, referred to as press-in apparatus), which repeats the operations of pressing and embedding the Z profile sheet pile in by receiving reaction force from pressed-in Z profile sheet piles, and moving the pres-in apparatus on the pressed-in Z profile sheet piles to press a new Z profile sheet pile in, in order.
As shown in
A configuration of the press-in apparatus will be explained.
The press-in apparatus 1 comprises a machine body section 3 and a chuck section 2 (press-in section) ascendably/descendably supported on the front side of the machine body section 3.
The machine body section 3 comprises a saddle 4 having four clamp parts (clamp parts) 5 for clamping the pressed-in Z profile sheet piles 7, and a mast which is provided to be movable back and forth to the saddle 4 and rotates on the saddle 4.
The clamp parts 5 are for clamping joint parts S (refer to
The clamp parts 5 are slidable back and forth to the saddle 4. The clamp parts 5 are driven to carry out the operations of clamping and releasing the pressed-in Z profile sheet piles 7.
The mast 6 is erected on the slide frame which is movable back and forth to the saddle 4, and is rotatable around the shaft in the up-and-down directions as a center.
A pair of rail parts 61 which extend in up-and-down directions are provided on the front surface side of the mast 6 in spaced relationship to each other in right-and-left directions. The sliding members 23 provided on the chuck section 2 are slidably engaged with the rail portions 6, so that the chuck section 2 can ascendably/descendably be supported by the machine body section 3.
A pair of vertical hydraulic cylinders 24 which extend to the chuck section 2 side are attached to the mast 6 to extend in the up-and-down directions. The vertical hydraulic cylinders 24 are in spaced relationship to each other in the right-and-left directions. The vertical hydraulic cylinders 24 are joined to the tip portions of arms 62 at the lower end portions thereof. When the vertical hydraulic cylinders 24 are driven, the cylinder rods expand and contract. Thus, the chuck section 2 moves up and down along the rails 61.
The chuck section 2 comprises a chuck body 21 and a chuck 22.
The chuck 22 grasps two Z profile sheet piles at a time in a state where the two Z profile sheet piles to be pressed in are joined each other at the clutches 73, and presses in the ground in order. As shown in
The fixed jaws 222 and the movable jaws 223 are provided to grasp each of the flange portions 71a which is the opposite side of the clutches 73 at which the two Z profile sheet piles are joined each other (refer to
The supporting member 224 is provided to be movable in a direction toward the fixed jaws 222 or a direction away from the fixed jaws 222 by a hydraulic cylinder 225 (refer to
The operations of grasping or releasing the each flange portion 71a of the two Z profile sheet piles 7 can be carried out by driving the chuck 22. Accordingly, the Z profile sheet piles can be grasped and pressed in every two piles or one pile in order.
The chuck 22 is rotatable around the vertical shaft which passes the center of the chuck 22. The operations of the above described press-in apparatus for the Z profile sheet pile will be explained referring to
The clamp parts 5 clamps the pressed-in Z profile sheet piles 7, and the chuck 22 grasps two Z profile sheet piles 7 at the same time in a state where the two Z profile sheet piles 7 are joined each other at the clutches 73. That is, the movable jaws 223 move in a direction toward the fixed jaws 222 through the supporting member 224 by driving the hydraulic cylinder 225, thereby grasping each flange portion 71a of the two Z profile sheet piles 7.
The vertical hydraulic cylinders 24 move the chuck section 2 downward to press the two Z profile sheet piles 7 in at the same time. When the amount of downward movement of the chuck 22 reaches the predetermined amount, and the two Z profile sheet piles 7 are embedded in the ground, the chuck 22 releases the two Z profile sheet piles 7. That is, by moving the movable jaws 223 in a direction away from the fixed jaws 223 through the supporting member 224 by driving the hydraulic cylinder 225, each flange portion 71a of the two Z profile sheet piles 7 is released. The vertical hydraulic cylinders 24 move the chuck section 2 upward, so that the two Z profile sheet piles 7 are detached from the chuck section 2.
The slide frame moves forward with respect to the saddle 4. The chuck 22 rotates 180° and grasps two Z profile sheet piles 7 to be pressed in next.
The vertical hydraulic cylinders 24 move the chuck section 2 downward a predetermined amount so as to press the next two Z profile sheet piles 7 in partway.
The clamp parts 5 release the pressed-in piles 7, and the vertical hydraulic cylinders 24 move the machine body section 3 upward. The saddle 4 is slid forward with respect to the slide base. The vertical hydraulic cylinders 24 move the machine body section 3 downward. The clamp parts 5 clamp the pressed-in Z profile sheet piles 7 which exist forward to receive reaction force generated in the pressed-in piles 7. The chuck 2 grasps the next two Z profile sheet piles 7 which were pressed in partway to press them in at the same time. That is, the chuck 22 grasps the two Z profile sheet piles 7 again, and the chuck section 22 is moved downward a predetermined amount to completely press the two Z profile sheet piles 7 in and embed in the ground. By repeating the above described steps, two Z profile sheet piles 7 are pressed in at a time in order. The Z profile sheet piles 7 are embedded in the ground so as to make directions of convexities which are formed by two joined Z profile sheet piles 7 face to opposite direction each other alternately (refer to
According to the embodiment in the present invention, two Z profile sheet piles 7 are pressed in at a time in order in a state where two Z profile sheet piles are joined each other at the clutches 73 thereof, so that construction can be stably carried out with high accuracy in a state where Z profile sheet piles have high stiffness in comparison to the earlier developed method. Moreover, since two Z profile sheet piles 7 are pressed in at a time in order, the pitch to be constructed becomes long. Thus, the cost for the construction can be reduced.
Since the fixed jaws 222 and the movable jaws 223 of the chuck section 2 grasp each of two Z profile sheet piles individually, the Z profile sheet piles 7 can be pressed in one by one. Accordingly, even when the toe resistance received from the ground is high, the area to receive the toe resistance becomes half by pressing the Z profile sheet piles 7 in one by one. Therefore, the toe resistance can be reduced. Thus, the deformation of the Z profile sheet pile 7 can be prevented, thereby making the press-in easy.
Since the fixed jaws 222 and the movable jaws 223 grasp each flange portion 71a of the two Z profile sheet piles 7 which is the opposite side of the clutch 73 at which the two Z profile sheet piles 7 are joined each other, a portion near the forefront of the joined two Z profile sheet piles 7 in a direction of movement of the pile press-in apparatus are grasped. Thus, the Z profile sheet piles 7 can be controlled easily and pressed in with high accuracy. Moreover, the press-in apparatus can be compact in view of the strength of the Z profile sheet piles. Since an auger apparatus or a jet hose (pipe) can be disposed in the convexities which are formed by joining two Z profile sheet piles 7, a simultaneous press-in method can be carried out.
The four clamp parts 5 grasp each joint part S of the clutches 73 of the pressed-in five Z profile sheet piles 7 which are joined each other. Thus, as shown in
The present invention is not limited to the above described embodiment, and changes may be made without departing from the spirit of the present invention.
For example, in the above embodiment, when pressing two Z profile sheet piles 7 in at a time in order, the two Z profile sheet piles 7 are pressed in at the same time through a plurality of steps in a state where the two Z profile sheet piles are joined at the clutches 73. However, the two Z profile sheet piles 7 may be pressed in alternately one by one through the plurality of steps in a state where the two Z profile sheet piles 7 are joined at the clutches 73.
As described above, when pressing two Z profile sheet piles 7 in at a time in order, when the Z profile sheet piles are pressed in alternately one by one through the plurality of steps, the Z profile sheet piles 7 can be stably pressed in without the Z profile sheet pile 7 on the front side blurs, and the construction can be carried out with high accuracy in comparison with the case where the two Z profile sheet piles 7 are pressed in at a time through the plurality of steps. In the above embodiment, the fixed jaws 222 and the movable jaws 223 of the chuck section 2 are provided to grasp each flange portion 71a which is the opposite side of the clutches 73 at which the two Z profile sheet piles 7 are joined each other. However, the chuck section 2 may be provided at positions as shown in
That is, in
In
In
In the embodiment, a section for grasping two Z profile sheet piles 7 comprises the fixed jaws 222, the movable jaws 223, the supporting member 224, and the hydraulic cylinder 225. However, the section for grasping two Z profile sheet piles 7 may comprise four hydraulic cylinders for grasping each flange 71a.
The clamp parts 5 are configured to clamp the joint parts S of the pressed-in Z profile sheet piles 7 so as not to deform the clutches 73 as shown in
The entire disclosure of Japanese Patent Application No. Tokugan 2003-364857 which was filed on Oct. 24, 2003, including specification, claims, drawings and summary are incorporated herein by reference in its entirety.
| Number | Date | Country | Kind |
|---|---|---|---|
| 2003-364857 | Oct 2003 | JP | national |
