TRENCH WALL CUTTING DEVICE AND METHOD FOR CUTTING A CUT TRENCH IN THE GROUND

Abstract

The invention relates to a trench wall cutting device, to a trench cutter having a trench wall cutting device according to the invention, and to a method for cutting a cut trench using a trench cutter, which is constructed from at least two cutter modules, and at least one supply unit, which is connected to the cutter modules by means of cables. The first cutter module can be lowered into a guide trench before the second cutter module is placed onto the first cutter module. As a result, a cut trench can be created at a location with a restricted height, wherein in the trench the cutter has a guide height that is greater than the height of the site out of which the cut trench is generated.

Claims

1.-15. (canceled)

16. A trench wall cutting device, comprising a trench cutter which is constructed from at least two cutter modules and comprises cutting wheels, and a supporting structure for suspending and moving the trench cutter in a vertical direction in order to form a cut trench in the ground, wherein the supporting structure has a guide apparatus, which is configured to supply the separated cutter modules to a working region at which the cut trench is to be created, wherein the cutter modules can be assembled at the working region to the trench cutter, and the supporting structure comprises at least one guide rail, along which the individual cutter modules are mounted so as to be shiftable transversely to the cut trench.

17. The trench wall cutting device according to claim 16, wherein a first cutter module having cutting wheels is provided, and a second cutter module having at least one drive unit and/or a guide frame is provided.

18. the trench wall cutting device according to claim 17, wherein a pump that can be driven by the drive unit is provided in the second cutter module.

19. The trench wall cutting device according to claim 16, wherein at least one further cutter module comprising a guide frame is provided.

20. The trench wall cutting device according to claim 16, wherein a shifting apparatus having a traversing drive for shifting the cutter modules is provided.

21. The trench wall cutting device according to claim 16, wherein the cutter modules have connection surfaces on which releasable connection apparatuses are arranged.

22. The trench wall cutting device according to claim 16, wherein the supporting structure extends along a working region in which adjacent cut trenches are made.

23. The trench wall cutting device according to claim 16, wherein at least one lifting unit for vertically moving the trench cutter is arranged on the supporting structure.

24. The trench wall cutting device according to claim 16, wherein at least one supply unit having at least one hose reel and/or cable reel is arranged on the supporting structure.

25. The trench wall cutting device according to claim 16, wherein the trench cutter is constructed from at least two cutter modules, which are of substantially the same height.

26. The trench wall cutting device according to claim 16, wherein the trench cutter is constructed from at least two cutter modules, which are releasably mechanically interconnected, wherein a first cutter module, having the cutting wheels, is directly connected to a first supply unit for a power supply, independently of the second cutter module.

27. A method for cutting a cut trench in the ground using a trench wall cutting device, in particular according to claim 16, in which a supporting structure having a guide apparatus is arranged, and a trench cutter with cutting wheels is arranged on the supporting structure and is lowered into the ground in a vertical direction, wherein ground material is cut away in a working region, thus forming the cut trench, wherein the trench cutter is constructed from at least two cutter modules which are supplied to the working region in a manner separated from one another by means of the guide apparatus and are connected to one another at the working region in order to form the trench cutter, and the supporting structure comprises at least one guide rail, along which the individual cutter modules are mounted so as to be shiftable transversely to the cut trench.

28. The method according to claim 27, wherein at least two adjacent cut trenches are created, wherein, once a first cut trench has been created, the trench cutter is retracted out of the first cut trench while separating the cutter modules, and to form a further cut trench, the cutter modules are moved along the guide apparatus and reconnected to form the trench cutter, which is then lowered into the ground while cutting away ground material.

29. The method according to claim 27, wherein to form a trench wall in the ground, the at least one cut trench is filled with a settable suspension, which hardens to form the trench wall.

Description

[0037] The invention will be described further below on the basis of preferred exemplary embodiments shown schematically in the drawings, in which:

[0038] FIG. 1 is a perspective view of a trench wall cutting device according to the invention;

[0039] FIG. 2 is a front view of the trench wall cutting device from FIG. 1;

[0040] FIG. 3 is a side view of the trench wall cutting device from FIG. 2;

[0041] FIG. 4 is a plan view of the trench wall cutting device according to FIGS. 1 to 3;

[0042] FIG. 5 is a perspective view of a supporting structure of the trench wall cutting device according to the invention in accordance with FIG. 1;

[0043] FIG. 6 is an enlarged perspective view of a first cutter module of the trench wall cutting device from FIG. 1;

[0044] FIG. 7 is an enlarged perspective view of a second cutter module of the trench wall cutting device from FIG. 1;

[0045] FIG. 8 is a perspective view of a shift slide for a trench wall cutting device according to the invention;

[0046] FIG. 9 is a perspective view of a supply unit comprising hose reels for a trench wall cutting device according to the invention;

[0047] FIG. 10 is a perspective view of another supply unit comprising a cable reel for a trench wall cutting device according to the invention;

[0048] FIG. 11 is a front view of a trench wall cutting device according to the invention during use;

[0049] FIG. 12 is a schematic cross-sectional view from the side of the trench wall cutting device from FIG. 11;

[0050] FIG. 13 is a front view of the trench wall cutting device according to the invention from FIG. 11, with the trench cutter put together;

[0051] FIG. 14 is a side view of the trench wall cutting device from FIG. 13;

[0052] FIG. 15 is a front view of the trench wall cutting device from FIGS. 11 to 14 at the start of the cutting process; and

[0053] FIG. 16 is a side view of the trench wall cutting device from FIG. 15.

[0054] FIGS. 1 to 4 are various views of a trench wall cutting device 10 according to the invention, which is configured for installation in a tunnel having an approximately circular tunnel cross section. The trench wall cutting device 10 according to FIGS. 1 to 4 is shown in a resting or starting position before a cutting method according to the invention is carried out.

[0055] The trench wall cutting device 10 has a scaffold-like supporting structure 20, which is also shown in more detail in FIG. 5. The supporting structure 20 comprises a grid-like bottom bearing surface 21, which is constructed from longitudinal beams and crossbeams. In addition, a similarly grid-like or ladder-like ceiling region 23 is provided, which is borne by means of a plurality of vertical props 22 of the bottom bearing surface 21. A guide apparatus 24 having guide rails 25, the functioning of which will be described further below, is formed along the ceiling region 23 and along the bottom bearing surface 21. The longitudinal beams of both the bottom bearing surface 21 and the ceiling region 23 can form guide rails 25 of a shifting apparatus 26. The vertical props 22, which are each arranged in pairs and each connect the bottom bearing surface 21 and the ceiling region 23 in the region of crossbeams, can be arranged at a substantially uniform distance from one another. An exception to this can be a cutting portion 28 for assembling and disassembling a trench cutter in a middle region of the supporting structure 20. At this cutting portion 28, at which the vertical props 22 are at a greater distance from one another, a bottom passage 29 for the trench cutter is formed in the bottom bearing surface 21. In principle, a bottom passage 29 of this kind can be provided between all the pairs of vertical props 22.

[0056] As shown in FIGS. 1 to 4, a first cutter module 40 is arranged in the cutting portion 28 when in the resting or starting state. The first cutter module 40 has a main frame 44 having cutting wheels 42 arranged thereon. By means of the main frame 44, the first cutter module 42 is mounted so as to be shiftable along the upper guide rails 25 in a longitudinal direction of the supporting structure 20.

[0057] To the side next to the first cutter module 40, a second cutter module 50 having a guide frame 54 is likewise mounted so as to be shiftable along the upper guide rails 25 of the shifting apparatus 26. The second cutter module 50 having the drive unit 52 mounted therein is suspended on two cables 64. In this case, the cables 64 are guided, by a winch 62 of a lifting unit 60, along the upper ceiling region 23 as far as to a shift slide 27, which guides the cables 64, by means of deflection rollers, to the second cutter module 50 and releasably fastens them thereto. Besides a lifting function for raising and lowering a trench cutter, the cable 64 can also be part of the shifting apparatus 26 for longitudinally shifting at least the second cutter module 50 along the upper guide rails 25.

[0058] In the trench wall cutting device 10 shown according to FIGS. 1 to 4, on the left-hand side of the supporting structure 20 in relation to the cutting portion 28, a first supply unit 80 having a rotatable cable reel 82 for a plurality of cables 84 is shiftably mounted on a first supporting slide 86. The cables 84 can be configured for electrical power, as data cables or also for supplying hydraulic energy or compressed air to the first cutter module 40 having the cutting wheels 42. In the embodiment shown, the first supporting slide 86 is mounted so as to be longitudinally shiftable and securable along both the guide rails 25 on the ceiling region 23 and guide rails 25 of the bottom bearing surface 21. The first supply unit 80 is connected directly to the first cutter module 40.

[0059] On the right-hand side, there is a second supply unit 70 having a hose reel 72 and a cable reel 73, which are rotatably mounted in a second supporting slide 76. The second supporting slide 76, on which two winch drums of the winch 62 are also rotatably mounted, can be shifted longitudinally and secured along the guide rails 25 on the upper ceiling region 23. The second supply unit 70 is used to directly supply the second cutter module 50.

[0060] FIGS. 1 to 4 show a hose line 74 of the hose reel 72. The hose line 74 can be configured to remove cut-away ground material together with support fluid. Further cables 75 on the cable reel 73 can be in the form of electrical cables for control or measurement signals or for supplying or removing hydraulic fluid. The media are supplied to and removed from the supporting structure 20 by means of cables and hoses as usual, and this is not illustrated for clarity reasons.

[0061] FIG. 6 shows the first cutter module 40 in more detail. Two pairs of cutting wheels 42 are rotatably mounted on a main frame 44, which is approximately U-shaped in cross section. Each two cutting wheels 42 are rotatably mounted on a central cutting plate 43 attached to an underside of the main frame 44. As is generally known, the cutting wheels 42 are provided with excavation teeth on their exterior for excavating ground material.

[0062] Between the two pairs of cutting wheels 42, which rotate in opposite directions towards the middle, there is a suction nozzle 45 for suctioning off the cut-away ground material along with the surrounding support or cutting fluid. A cutting drive 46 is attached to the main frame 44 for each pair of cutting wheels 42. In principle, the drive could also be integrated in the cutting wheels 42. In addition, vertical and horizontal surfaces are provided on the main frame 44 as first connection surfaces 48, it being possible to provide through-holes 49 for bolt connections. Sockets 41 are used for connecting to the first supply unit 80, as will be explained in more detail in connection with FIG. 10.

[0063] According to FIG. 7, a second cutter module 50 is shown, which consists of a box-like guide frame 54. In cross section, the guide frame 54 corresponds more or less to the cutting cross section of the first cutter module 40, such that the trench cutter is guided by the guide frame 54 itself in the cut trench. As is generally known, plate-like actuators 56 that can be folded out by means of hydraulic cylinders are provided for any position corrections, said actuators enabling a degree of position adjustment in relation to the walls of the cut trench.

[0064] Second connection surfaces 58 are provided on the guide frame 54 and enable a precisely positioned connection to the first connection surfaces 48 on the first cutter module 40. Within the guide frame 54, a drive unit 52 in the form of a pump apparatus is attached. At the top of the guide frame 54, a retaining apparatus 55 is provided in a middle region for attaching a hoist cable.

[0065] The first cutter module 40 and the second cutter module 50 can be mechanically interconnected.

[0066] FIG. 8 shows the above-mentioned shift slide 27 in more detail. It has a slide frame 34, on the outside of which four guide rollers 35 are rotatably mounted. By means of the guide rollers 35, the shift slide 27 is linearly guided on the supporting structure 20 on or in the guide rails 25 of the guide apparatus 24.

[0067] The guide rollers 35 are each arranged in opposing pairs; between the two pairs, a gap is formed, in which there are arranged two laterally opposing deflection rollers 36 for the cable 64 for retaining the second cutter module 50 and thus the trench cutter as a whole. By means of the deflection rollers 36, the approximately horizontally guided cables 64 from the winch 62 are deflected vertically downwards. To deflect the hose line 74 and the cables 75 from the second supply unit 70, curved, for example quadrant-shaped hose guides 37 are arranged on the slide frame 34. By means of these hose guides 37, the horizontally supplied hose line 74 and the cables 75 are deflected in a vertical direction towards the trench cutter.

[0068] FIG. 9 shows the aforementioned second supply unit 70 in more detail. It has a second support slide 76, in which a hose reel 72 for a large hose line 74 for a fluid, and a cable reel 73 for two hydraulic hoses 75 and two electrical cables 75, are rotatably mounted. In addition, a winch drum of the winch 62 for two cables 64 running in parallel with one another is rotatably mounted in a rear region of the second support slide 76. Along each of the two side flanks of the second support slide 76, four guide rollers 35 are arranged in a uniformly distributed manner and are rotatably mounted. By means of the guide rollers 35, the second supply unit 70 is mounted on the ceiling region 23 of the supporting structure 20 so as to be longitudinally shiftable along the guide rails 25.

[0069] The first supply unit 80 in accordance with FIG. 10 is configured similarly. It comprises a first support slide 86, on which a cable reel 82 is rotatably mounted. On each of its side flanks, the first support slide 86 is provided with three upper guide rollers 35, which are linearly guided along the guide rails 25 on the ceiling region 23 of the supporting structure 20. In addition, two side contact rollers 38 are rotatably mounted on a lower region of the first support slide 86, said contact rollers resting on the bottom bearing surface 21 along the guide rails 25 and being linearly guided along it.

[0070] On an end face of the first support slide 86, a quadrant-shaped, curved deflection guide 88 is arranged, by which cables from the cable reel 82 can be deflected out of the horizontal into a vertical towards the trench cutter.

[0071] Locking apparatuses 89 are used for connecting to the first cutter module 40 by being inserted into the sockets 41 (see FIG. 6) on the first cutter module 40, e.g. by being horizontally extended by means of hydraulic cylinders. By means of a lifting apparatus 90, which can comprise one or two hydraulic cylinders for example, the first cutter module 40 can thus be lowered into the guide trench and lifted out of it again once the trench has been completed.

[0072] The use of a trench wall cutting device 10 according to the invention and the carrying out of a method according to the invention for cutting a cut trench in confined spaces are explained in more detail in conjunction with FIGS. 11 to 16.

[0073] FIG. 11 shows the arrangement of a trench wall cutting device 10 according to the invention in a tunnel tube 5 in the ground, said bore having a circular tunnel cross section in the partial cross-sectional view according to FIG. 12. Before the trench wall cutting device 10 is introduced into the tunnel tube 5, a guide trench 6 having solid guiding walls 7 is created on the bottom of the tunnel tube 5, as is generally known. The guiding walls 7 can be concreted or formed by inserted guiding elements made of concrete or steel. The guide trench 6 can have a depth of between 1 m and 5 m and is created, for example, by means of an excavator or a blade cutter, as is generally known. The guide trench 6 is used for the initial guidance of the trench cutter along the guiding walls 7, as is generally known. For the method according to the invention, the guide trench is additionally used as an assembly space for assembling and connecting the first cutter module 40 to the second cutter module 50, as explained in more detail below.

[0074] The trench wall cutting device introduced into the tunnel tube 5 corresponds to the above-described trench cutting device 10 and has, as essential components, a scaffold-like supporting structure 20, in which a first cutter module 40, a second cutter module 50, a first supply unit 80 and a second supply unit 70 are guided in a linearly shiftable manner and retained. The supporting structure 20 is adapted to the tunnel tube 5, a bottom bearing surface 21 being braced on the bottom of the tunnel tube 5, and a ceiling region 23 of the supporting structure 20 being braced on a ceiling of the tunnel tube 5. It is also possible for the trench wall cutting device 10 to be braced on the bottom only, and not on the ceiling. The tunnel tube 5 can have a diameter of approximately 2 m to 6 m. With an accordingly large tunnel cross section, lateral bracing of the trench wall cutting device 10 is also conceivable, without this restricting the side clearance, which can be used, for example, as a transport path.

[0075] In a first method step according to FIG. 13, the first cutter module 40 having the cutting wheels 42 is connected to the first supply unit 80 by means of the locking apparatus 89, and then lowered at least in part into the guide trench 6, which has been made in advance, by means of the lifting apparatus 90, such that the second cutter module 50 can be shifted along the supporting structure 20 by means of the first cutter module 40. The second supply unit 70 can thus be shifted in accordance with the second cutter module 50 and track said module. In this position according to FIGS. 13 and 14, the first cutter module 40 can be put together with and connected to the second cutter module 50 in order to form the operational trench cutter 30, as shown in FIGS. 15 and 16.

[0076] Once the mechanical connections between the two cutter modules 40, 50 are established, a locking between the first cutter module 40 and the first supply unit 80 by means of the locking apparatus 89 can be released. Next, the trench cutter 30 is lowered into the ground by means of the hoist cable 64 while rotating the cutting wheels 42, and ground material can be excavated to form the cut trench. In principle, the hose line 74 and the cables 75 from the second supply unit 70 can also be connected to the trench cutter 30, whereas the cables 84 from the first supply unit 80 are permanently connected. However, it is preferable for the cables between the first supply unit 80 and the first cutter module 30 and the cables between the second supply unit 70 and the second cutter module to each be permanently connected and to not need connecting again during set-up. The cut-away ground material can be pumped away via the suction nozzle 45 by means of the drive unit 52 in the form of the pump apparatus, and can then be conveyed away, by means of the hose line 74, out of the cut trench into the tunnel tube 5, and from there to the outside of the tunnel tube 5.

[0077] Once a desired final depth is reached, the trench cutter 30 can be retracted upwards again and disassembled in the opposite way. Once the trench wall cutting device 10 having the supporting structure 20 is relocated to a new working region either as a whole or by linearly shifting the cutter modules 40, 50 along the supporting structure 20, the assembly step can then be repeated in order to reassemble the trench cutter 30 and cut a trench again.

[0078] The supporting structure 20 can be configured not only as one part, as in the above exemplary embodiment, but can also be multi-part consisting of a plurality of components that are spaced apart from one another or interconnected by means of pivot joints. To control the trench cutter 30, a control stand can be provided, which is preferably provided on the supporting structure 20 or in the region of the trench cutter 30 itself. In principle, the trench cutter 30 can also be formed without having a suction apparatus directly on the trench cutter 30. In this case, a corresponding suction apparatus can be arranged in the region of the supporting structure 20. Alternatively, a suction device, in particular a pump, can be provided on either the first cutter module 40 having the cutting wheels 42, or on the second cutter module 50 directly above the cutting wheels 42.