Claims
- 1. A method of modifying a cross-sectional profile of an adit, tunnel gallery or like elongate aperture comprising widening the profile in selected areas thereof with a rotary boring head having an axis of rotation oriented transversely to a longitudinal axis of the aperture and to which a feed movement can be imparted in the direction of said axis of rotation, the method including the steps of using the boring head to bore a first recess in a wall of the aperture by imparting the feed movement to the boring head, retracting the boring head, moving the boring head forward in the lengthwise direction of the aperture, then using the boring head to form another recess in the wall of the aperture overlapping the first recess, the boring, retracting, and forward moving steps of the boring head being repeated in such a manner that a plurality of individual recesses overlapping one another is produced in the wall of the aperture as a sequence extending in the lengthwise direction of the aperture.
- 2. Apparatus for modifying a cross-sectional profile of an adit, tunnel, gallery or like elongate aperture by widening the profile in selected areas thereof, the apparatus comprising a support frame, a holding device associated with the support frame, the holding device having holding shields to be pressed against the wall of the aperture, at least one bearing housing suspended on a pivot arm which is pivotable in a plane substantially perpendicular to the longitudinal axis of the aperture, the bearing housing having a boring head, drive means associated with the bearing housing for rotating the boring head, the boring head having an axis of rotation substantially perpendicular to a tangent or cross-section of the aperture so that a front face of the boring head which is provided with tool elements, is oriented to face the wall of the aperture during operation, and a feeding device for imparting an operating feed movement to be boring head, the feeding device engaging at one end on the bearing housing and at an opposite end at least indirectly on the support frame.
- 3. Apparatus according to claim 2 wherein the pivot arm has an articulation point disposed on one of the holding shields.
- 4. Apparatus according to claim 2 wherein the feeding device engages at an opposite end on a holding shield.
- 5. Apparatus according to claim 2 wherein the support frame is provided with supporting legs.
- 6. Apparatus according to claim 2 wherein the effective diameter f the boring head is in the region of approximately 40% to 80% of the radius of a circular aperture profile.
- 7. Apparatus according to claim 6 wherein the effective diameter of the boring head is in the region of approximately 50% to 60% of the radius of a circular aperture profile.
- 8. Apparatus according to claim 2 wherein the apparatus is a part of a heading machine.
- 9. Apparatus according to claim 2 wherein the apparatus has a towing connection with a heading machine or like unit associated therewith.
- 10. Apparatus according to claim 9 wherein the connection comprises at least one piston-cylinder unit.
- 11. Apparatus according to claim 2 wherein the apparatus is disposed directly behind a boring mechanism of a heading machine.
- 12. Apparatus according to claim 2 wherein the apparatus is covered at least in a roof area by a shield or the like.
- 13. Apparatus for modifying a cross-sectional profile, of an adit, tunnel, gallery or like elongate aperture by widening the profile in selected areas thereof, the apparatus comprising a support frame, a holding device associated with the support frame, the holding device having holding shields to be pressed against the wall the of aperture, at least one bearing housing supported at least indirectly by the support frame, the bearing housing having a boring head, drive means associated with the bearing housing for rotating the boring head, the bearing housing being displaceable on a rectilinear guide, the boring head having an axis of rotation aligned in the direction of displacement of the bearing housing so that a front face of the boring head provided with tool elements is oriented to face the wall of the aperture during operation, and a feeding device for imparting an operative feed movement to the boring head, the feeding device engaging at one end on the bearing housing.
- 14. Apparatus according to claim 13 wherein the guide is provided on a component of the support frame or is formed by said component.
- 15. Apparatus according to claim 13 where the feeding device engages at an opposite end on a second bearing housing.
- 16. Apparatus according to claim 13 wherein the support frame is provided with supporting legs.
- 17. Apparatus according to claim 13 wherein the effective diameter of the boring head is in the region of approximately 40% to 80% of the radius of a circular aperture profile.
- 18. Apparatus according to claim 17 wherein the effective diameter of the boring head is in the region of approximately 50% to 60% of the radius of a circular aperture profile.
- 19. Apparatus according to claim 13 wherein the apparatus is part of a heading machine.
- 20. Apparatus according to claim 13 wherein the apparatus has a towing connection with a heading machine or like unit associated therewith.
- 21. Apparatus according to claim 20 wherein the connection comprises at least one piston-cylinder unit.
- 22. Apparatus according to claim 13 wherein the apparatus is disposed directly behind a boring mechanism of a heading machine.
- 23. Apparatus according to claim 13 wherein the apparatus is covered at least in a roof area by a shield or the like.
Priority Claims (1)
| Number |
Date |
Country |
Kind |
| 3421704 |
Jun 1984 |
DEX |
|
CROSS REFERENCE TO RELATED APPLICATION(S)
This U.S. application stems from PCT International Application No. PCT/DE85/00199 filed June 10, 1985.
1. Technical Field
The invention relates to a method and an apparatus for modifying the cross-sectional profile, in particular the circular profile, of an adit, tunnel, gallery or the like, by widening the profile in partial areas thereof by means of a tool which can be driven in a rotating manner.
In numerous cases it is desired or necessary to make a subsequent alteration to a cross-sectional profile--as initially existing--of a gallery or the like, in order to attain a final profile which meets specific demands. This applies particularly in the case of galleries or the like which have a circular cross-section, resulting in many cases from the nature of the advance, namely by heading by means of a full-cut heading machine, while a horseshoe shape is required as the final profile as may be the case for example in railway or road tunnels.
2. State of the Art
Heading machines are known in which tools are mounted for example on radially adjustable arms, or machines which comprise small boring heads arranged parallel to a main boring head and orientated in the same direction, in order to produce additional profile areas. Apart from the fact that such devices are often very complicated, there are usually also disadvantageous power ratios. Thrust forces must normally always be introduced into the side of a gallery or the wall of an adit by way of the holding elements of the machine, i.e. with a turn through 90.degree..
The object of the invention is to disclose an advantageous possibility of modifying an existing profile of a gallery, adit or the like in a manner which meets the numerous cases of requirement. In particular, it should be possible to alter a circular profile subsequently in such a way as to produce an essentially arcuate profile or a profile approximately in the shape of an inverted U. In addition to a method for this purpose the invention also aims to disclose an apparatus by means of which the modification of such an existing profile can be carried out in an advantageous manner. Additional, related problems, with which the invention is concerned, may be seen in the respective explanation of the solution disclosed.
The invention provides that with at least one boring head or a similar tool unit a sequence of individual recesses extending in the longitudinal direction of the adit is produced in the wall of the adit, the boring head having imparted to it in each case an advancing movement in the direction of its axis of rotation and transversely to the longitudinal direction of the adit, in particular perpendicular or substantially perpendicular to a tangent on the adit profile or to the wall of the adit. In particular the recesses are formed in such a way that they overlap one another.
An apparatus for finishing the outer limit of a tunnel, adit or the like, in particular for carrying out the method disclosed, is characterized according to the invention by a support frame, a holding device associated with the support frame and having holding shields or the like which can be pressed against the wall of the adit, at least one bearing housing or the like with a boring head or a similar tool unit, the front face of which is provided with tool elements and is turned to face the wall of the adit during operation, and by a heading device to impart to the boring head an operative movement in the direction of the wall of the adit.
The tool elements of the boring head may be of different types, as best meets the circumstances in question, i.e. the nature of the rock. Roller bits or cutting rollers, for example with teeth, studs, discs etc., or even knives or other cutting tools can be provided.
When the term "adit" is used in the description and in the claims, this should also be taken to include tunnels, galleries and other corresponding or similar spaces, in which it is possible for the invention to be applied. No restriction is implied therefore by these expressions.
PCT Information
| Filing Document |
Filing Date |
Country |
Kind |
102e Date |
371c Date |
| PCT/DE85/00199 |
6/10/1985 |
|
|
2/12/1986 |
2/12/1986 |
| Publishing Document |
Publishing Date |
Country |
Kind |
| WO86/00113 |
1/3/1986 |
|
|
US Referenced Citations (3)
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| Number |
Date |
Country |
| 1261459 |
Feb 1968 |
DEX |
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Feb 1968 |
DEX |
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DEX |
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Apr 1981 |
DEX |
| 3121244 |
Dec 1982 |
DEX |
| 3125082 |
Jan 1983 |
DEX |
| 3151060 |
Jul 1983 |
DEX |
| 2001904 |
Oct 1969 |
FRX |
| 2289720 |
May 1976 |
FRX |
Patent Grant
4696600
