Wall grooving apparatus and method for building grooves in ground

Abstract

The invention relates to a wall grooving device for building a groove in the ground, comprising: a base frame which extends in a longitudinal direction; at least one land removal device arranged at the lower end region of the base frame; a holding device for holding the wall slotting and milling machine at the upper end region; a tensioning device having at least two tensioning elements which are opposite each other and can be moved laterally transversely to the longitudinal direction, and at least one adjusting element, by means of which the tensioning elements can protrude laterally in the groove for tensioning at least one part of the wall grooving device; an intermediate frame which is displaceably supported in the lower region of the base frame along the base frame and on which a tensioning device with at least two tensioning elements and at least one adjusting element is arranged; and a pressing device, by means of which a pressing force can be applied to the at least one land removal device; wherein the pressing device is arranged between the middle frame and the basic frame. According to the invention, the holding device is fixedly connected to the intermediate frame; and the basic frame with the land removal device can be displaced relative to the holding device.

Description

Technical Field

[0001] The present invention relates to a wall groove device for constructing a groove in the ground according to the preamble of claim 1, the wall groove device comprising: a basic frame, which extends in the longitudinal direction; at least one soil removal device, which is arranged at the lower end area of ​​the basic frame; a holding device at the upper end area of ​​the wall groove device; a tensioning device, which has at least two tensioning elements that are opposite to each other and can be moved laterally and transversely to the longitudinal direction, and at least one adjustment element, the tensioning element can be extended laterally in the groove by the adjustment element for tensioning at least a part of the wall groove device; an intermediate frame, which is displaceably supported in the lower area of ​​the basic frame along the basic frame and the tensioning device with the at least two tensioning elements and the at least one adjustment element is arranged on the intermediate frame; and a pressing device, by which a pressing force can be applied to the at least one soil removal device; wherein the pressing device is arranged between the intermediate frame and the basic frame.

[0002] The invention also relates to a method for constructing a trench in the ground using such a wall trenching device according to the preamble of claim 13 . Background Art

[0003] Such wall slotting devices are known in particular as so-called wall slotting milling machines with a milling wheel as a soil removal device. The wall slotting devices are usually suspended on a carrier device via supporting ropes. A holding device for supporting ropes, supporting rods or the like is arranged at the upper end of the basic frame. Therefore, in such devices, the maximum contact force on the soil is limited by the weight of the wall slotting device.

[0004] However, when machining hard ground, for example stone or rock, it may be necessary to apply a higher contact force to the milling wheel. In principle, this can be done from outside the milling groove by means of a lifting table or a corresponding hydraulic cylinder on the carrier device. In this case, however, correspondingly large connecting rods are required to transmit the axial forces to the wall groove device, which is overall very cost-intensive and is no longer feasible even at greater milling depths.

[0005] EP 3 347 526 A1 discloses a wall slotting milling machine in which longitudinally and transversely displaceable tensioning plates are arranged on the milling machine frame, which together with transversely directed tensioning cylinders form a unit. The tensioning cylinders are supported here in each case on oppositely disposed tensioning plates. The unit consisting of tensioning plates and tensioning cylinders is supported so as to be movable in the transverse direction relative to the basic frame of the milling machine, so that the unit as a whole is floatingly supported. This floating support prevents the basic frame suspended on the support cables from shifting its position when the milling machine is tensioned in the milling slot in the transverse direction by extending the tensioning cylinders. In order to increase the contact force on the milling wheel, an assembly consisting of vertically directed pressure cylinders is arranged below the unit with the tensioning plates.

[0006] This known assembly requires a relatively large installation space, wherein the tensioning plates are arranged in the central region of the frame at a significant distance above the milling wheel. As a result, when milling a trench in the ground, additional contact pressure can only be applied relatively late, when a trench several meters deep has already been built.

[0007] EP 0 593 355 A1 teaches a similar floating support of a tensioning plate in the transverse direction. The tensioning plates are arranged on a common piston and can therefore be displaced together in the transverse direction.

[0008] EP0811724B1 discloses a wall slotting milling machine with a basic frame and a tool carrier part supported vertically displaceably at the bottom with a milling wheel. The basic frame held on the support rope can be tensioned in the milling slot via laterally directed tensioning elements, while the milling wheel can be moved downward.

[0009] EP 3401444 B1 discloses a wall slotting milling machine in which a transversely directed adjustment element is also supported on the one hand on a first tensioning plate and on the other hand on an opposite second tensioning plate. In addition, an additional tensioning cylinder directed obliquely downward is provided, with which the individual tensioning plates can be additionally tensioned relative to the intermediate frame. The intermediate frame is guided displaceably in the excavation direction on the basic frame of the milling machine. A pulling force can be applied to the milling wheel via an upper obliquely directed pressure cylinder in order to apply an additional excavation force. In this arrangement as well, a holding device for the support rope is also arranged on the basic frame.

[0010] DE 3805868 describes a wall slotting device according to the preamble of claim 1. This wall slotting device describes a relatively large and strong "intermediate frame" at the upper end of the "basic frame". This "intermediate frame" with its large mass cannot contribute to any (weight) force in the excavation direction in its tensioned state. Therefore, this mass is inactive and ineffective in the tensioned state. Summary of the invention

[0011] The invention is based on the object of specifying a wall groove device and a method with which a groove can be efficiently constructed in the ground while having a compact design of the wall groove device.

[0012] This object is achieved on the one hand by a wall groove device having the features of claim 1 and on the other hand by a method having the features of claim 13. Preferred embodiments of the invention are specified in the dependent claims.

[0013] The wall groove device according to the invention is characterized in that the holding device is fixedly connected to the intermediate frame and the basic frame with the soil removal device is displaceable relative to the holding device.

[0014] A first aspect of the invention is that the holding device for holding the wall groove device is not arranged directly on the basic frame with the soil removal device, but on the intermediate frame with the tensioning device. Therefore, the basic frame with the soil removal device can be displaced not only relative to the intermediate frame with the tensioning device, but also relative to the holding device in the excavation direction. As a result, the feeding of the soil removal device, in particular the milling wheel, at the basic frame can be caused without having to reposition the holding device. The holding device is provided for connection, in particular, to a support rope or a support rod at the carrier device. As a result, the displacement of the soil removal device can be achieved without having to reposition the support rope or the support rod at the carrier device. This simplifies the control of the feed movement and the desired contact pressure. From now on, this can be carried out in particular by separately controlling the contact pressure device.

[0015] According to another aspect of the invention, it is preferred that the intermediate frame with the tensioning device is arranged in the lower region of the wall groove device. As a result, the wall groove device can be tensioned at the wall of the previously formed guide groove even with a relatively short advance stroke. After tensioning by the tensioning device, the base frame is guided in a substantially vertical direction at the intermediate frame and the desired contact force can be applied to the soil removal device even at an early point in time.

[0016] According to a further development of the invention, the holding device is fixedly connected to the intermediate frame via one or more longitudinal beams extending along the basic frame. In principle, a single longitudinal beam can be sufficient, via which the intermediate frame arranged in the lower region is fixedly connected to the holding device located in the upper region of the wall slotting device. For a force distribution that is as symmetrical as possible, preferably two or more, in particular four longitudinal beams are arranged along the outer side of the basic frame. The longitudinal beams can be embodied in particular as double T-beams. Preferably, corresponding groove-shaped recesses are provided for the longitudinal beams along the basic frame, so that the longitudinal beams do not protrude beyond the outer dimensions of the basic frame. A particularly robust design of the wall slotting device is achieved by the holding device being arranged at a crossbeam, which is arranged in the upper region of the basic frame. In this way, the holding device, which can be a connecting element or coupling element for accommodating a load-bearing rope or load-bearing rod, can be positioned in the center of the wall slotting device and / or along the longitudinal axis of the wall slotting device. In the case of such a central arrangement, a good connection can be made to the longitudinal beams located outside via the at least one crossbeam.

[0017] Another preferred embodiment of the present invention is that the tensioning device has at least two adjustment elements arranged perpendicularly to the longitudinal direction, wherein at least one first adjustment element is supported on the intermediate frame on the one hand and on the first tensioning element on the other hand, and at least one second adjustment element is supported on the intermediate frame on the one hand and on the second tensioning element on the other hand, the second tensioning element is arranged opposite to the first tensioning element, and the first adjustment element and the second adjustment element can extend perpendicularly to the longitudinal direction.

[0018] Each plate-shaped tensioning element can be equipped with at least one dedicated adjustment element, in particular a tensioning cylinder, which is supported on the one hand on the corresponding tensioning element and on the other hand on the intermediate frame. The adjustment element is oriented transversely to the longitudinal direction of the wall slotting device or the excavation direction. As a result, the individual tensioning elements can be adjusted individually in a targeted manner relative to the intermediate frame. In addition, a clear separation is achieved between the transverse force and the longitudinal force for pressing the wall slotting device, which contributes to a compact design and efficient operation overall. In principle, the opposing tensioning elements can also be arranged on a common holder or adjustment device, wherein the holder is supported on the basic frame in a floating and displaceable manner in the transverse direction and / or in the longitudinal direction.

[0019] According to a further development of the invention, a compact design is promoted by the fact that the intermediate frame is displaceably supported on the base frame at a support section, the support section having a reduced cross section compared to the base frame while forming at least one free space, and at least one receptacle for receiving at least a part of an adjustment element is formed on the displaceable intermediate frame, wherein the receptacle is arranged in the free space formed. As a result, there is sufficient structural space for arranging the adjustment element, which is an actuator or a linear drive, in particular a tensioning cylinder, preferably a hydraulic cylinder.

[0020] For symmetrical force application, it is also advantageous to form two lateral free spaces on the support section and to form two corresponding receptacles for adjustment elements on the intermediate frame. Thus, adjustment elements for opposing tensioning elements can be arranged in the two lateral receptacles. In this case, at least one first adjustment element and at least one second adjustment element are provided in each lateral receptacle for the corresponding opposing tensioning element.

[0021] Preferably, the receptacle can be open and designed only with a base plate, to which the corresponding adjustment element is fixed and supported. The opposing adjustment elements can be supported on the same base plate, wherein transverse forces on the base plate are substantially compensated. According to another embodiment variant of the invention, it is advantageous if at least one receptacle on the intermediate frame is box-shaped and has at least one first adjustment element and at least one second adjustment element. The box-shaped receptacle has side walls facing the corresponding plate-shaped tensioning elements, wherein the side walls each have at least one through-hole for at least one of the adjustment elements and at least one support region for accommodating an adjustment element directed toward the opposing tensioning element.

[0022] According to an improved solution of the present invention, in order to apply a particularly high tensioning force to the tensioning element, it is preferred that a plurality of first adjustment elements and a plurality of second adjustment elements are arranged in the receiving portion of the intermediate frame. In particular, two first adjustment elements and two second adjustment elements are arranged in each receiving portion, and the first adjustment elements and the second adjustment elements are respectively directed in opposite directions transverse to the longitudinal direction.

[0023] According to a further development of the invention, in order to actuate the individual adjusting elements in a targeted manner, a control device is advantageously provided, by means of which the first adjusting element and the second adjusting element can be extended in a defined manner. In particular, the adjusting elements can be extended uniformly, so that the individual tensioning elements are located at the surrounding wall of the groove as much as possible at the same time, so that the position of the basic frame of the wall groove cutting device in the groove does not change.

[0024] In particular, according to one embodiment of the invention, it is preferred that the control device is designed to initially extend the at least one first adjusting element and the at least one second adjusting element with a first low pressing force until the tensioning element bears against the surrounding ground and then to apply a high pressing force for tensioning. In particular, the high tensioning force required for tensioning is initiated by the control device only when it is determined that no more extension movement is taking place at the adjusting element at the first adjusting force. This can be considered a symptom of the situation that the respective tensioning element bears against the respective adjacent wall when extended into the tensioning position.

[0025] It is particularly advantageous if the control device is connected to a sensor, by which the contact pressure and / or the extended position of the adjusting element can be detected. The contact pressure can be detected at the individual adjusting elements or centrally for a group of adjusting elements or for all adjusting elements as a whole.

[0026] Another preferred embodiment of the present invention is that the holding down device is arranged above the tensioning device and has at least one, preferably a plurality of holding down cylinders. In the case of such an upper arrangement of the holding down device, the tensioning device can be arranged very close to the soil removal device. This allows early tensioning of the wall slotting device in the formed groove, so that additional holding down forces can be applied to the soil removal device already in an early stage of the foundation construction method. The one or more holding down cylinders are designed in this way so that they apply a pulling force to the basic frame in order to apply the holding down forces. By pulling the at least one holding down cylinder together, the basic frame and thus the soil removal device can be pulled downwards with the desired force.

[0027] According to a further development of the invention, a particularly stable embodiment can be achieved by each clamping cylinder being arranged on the one hand on the base frame and on the other hand on the intermediate frame or the tensioning element. This allows a direct flow of force during clamping between the longitudinally displaceable base frame and the fixed intermediate frame or the corresponding tensioning element.

[0028] In principle, at least one holding-down cylinder can be arranged parallel to the longitudinal direction of the wall slotting device. According to one embodiment of the invention, a particularly compact assembly is achieved in that the holding-down cylinders are arranged obliquely to the vertical, wherein by actuating the holding-down cylinders the base frame with the soil removal device can be pressed downward relative to the tensioned intermediate frame.

[0029] A particularly suitable embodiment of the invention is in particular that the wall slotting device is designed as a wall slotting milling machine, wherein the soil removal device has at least one milling wheel. Preferably, two pairs of driven milling wheels with milling wheel axes parallel to one another are arranged at the lower end of the basic frame as soil removal devices.

[0030] An alternative embodiment of the invention is a wall slotting device which is designed as a wall slotting gripper, wherein the soil removal device has a grab blade. In the case of a wall slotting gripper, a particularly high removal power can be achieved by the tensioning device designed according to the invention, in particular when the grab blade is pushed into the ground and closed.

[0031] The present invention also includes a method for constructing a groove in the ground using the wall groove device according to the present invention described above, wherein the method is characterized in that the wall groove device is held at the upper end region by means of a holding device; the ground is removed while constructing the groove by means of at least one ground removal device, the ground removal device being arranged at the lower end region of the basic frame; at least two opposite tensioning elements are extended laterally by means of a tensioning device through at least two adjustment elements pointing perpendicularly to the longitudinal direction, wherein at least a part of the wall groove device is tensioned in the groove; a pressing force is applied to the at least one ground removal device by means of a pressing device; the tensioning device with the at least two tensioning elements and the adjustment element is arranged on an intermediate frame, the holding device is mounted on the intermediate frame, and the basic frame is supported displaceably relative to the intermediate frame and the holding device; the intermediate frame is tensioned and fixed relative to the ground by means of the tensioning device; and the basic frame with the ground removal device is pressed downward by means of the pressing device and the basic frame with the ground removal device is displaced relative to the intermediate frame and the holding device.

[0032] With the method according to the invention, the advantages described above can be achieved during operation of the wall groove device according to the invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The present invention is further described below with reference to a preferred embodiment, which is schematically shown in the accompanying drawings. In the drawings:

[0034] Figure 1 A perspective view showing a wall notching device according to the invention with a retracted milling wheel;

[0035] Figure 2 Show according to Figure 1 A side view of a wall slotting device;

[0036] Figure 3 Show Figure 1 and Figure 2 A front view of a wall slotting device;

[0037] Figure 4 A perspective view showing a wall slotting device according to the invention with an extended milling wheel;

[0038] Figure 5 Show Figure 4 A perspective detail view of the upper region of the wall groove device according to the invention;

[0039] Figure 6 Shown in accordance with Figures 1 to 3 A perspective detail view of the lower region of the wall groove device according to the invention in the state;

[0040] Figure 7 Shown in accordance with Figure 4 A perspective detail view of the lower region of the wall groove device according to the invention in the state of FIG.

[0041] Figure 8 A perspective view of a wall groove device according to the invention is shown together with a carrier unit. DETAILED DESCRIPTION

[0042] exist Figures 1 to 3 1 shows a wall slotting device 10 according to the invention with an elongated basic frame 12. The preferably bracket-shaped and rectangular in cross section basic frame 12 can have a tapered support section 16 at its lower end region, which is also designed with a substantially rectangular cross section. The long sides can be shortened compared to the cross section of the basic frame 12 so that two lateral free spaces 17 are formed. A soil removal device 20 for removing soil material can be arranged on the underside of the support section 16.

[0043] In the present embodiment, the soil removal device 20 is formed by way of example by four milling wheels 22, of which two milling wheels form a milling wheel pair with a common milling wheel axis. The milling wheels 22 in the milling wheel pair are each rotatably supported on a central support plate and driven in a manner known in principle. Between the two pairs of milling wheels 22, a suction box 18 can be arranged in a manner also known in principle, which is used to suck the milled soil material. For the sake of clarity, the suction line along the center of the basic frame 12 is not shown in more detail.

[0044] The intermediate frame 60 with the tensioning device 50 is supported longitudinally displaceably on the support section 16 of the basic frame 12. The intermediate frame 60 can have two front plates 62, which can be connected to each other via two outer plates 64 and two inner plates 66, so that the box-shaped intermediate frame 60 surrounds the rectangular support section 16 in a ring manner and is supported displaceably in the longitudinal direction on the support section.

[0045] On the two short sides of the intermediate frame 60, an outer plate 64 and an inner plate can be arranged at a distance from each other, wherein a box-shaped receptacle 70 can be formed between them. The two lateral receptacles 70 are located in two free spaces 17, which are formed by the retraction of the support section 16 relative to the basic frame 12. Two forward-pointing first adjustment elements and two rearward-pointing second adjustment elements can be arranged in the receptacles 70 to form the tensioning device 50, which are in particular designed as hydraulic cylinders. The lateral plate-shaped tensioning elements 52 can be extended and retracted laterally via the adjustment elements in order to fix and tension the wall slotting device 10 in the milled slot.

[0046] In order to form the hold-down device 30, four hold-down cylinders 32 are provided by way of example. Two hold-down cylinders 32 are arranged on the front side of the basic frame 12 and two hold-down cylinders 32 are arranged on the back side of the basic frame. Each hold-down cylinder 32 is hinged with its cylinder housing at a bearing seat 36, which is fixed to the basic frame 12. The piston rod of each hold-down cylinder 32 is connected to a correspondingly matched plate-shaped tensioning element 52 via a pivot pin connection 38.

[0047] The pressing cylinder 32 can be used to cause the basic frame 12 to be displaced relative to the intermediate frame 60. In this case, the milling wheel 22 can be moved from Figures 1 to 3 Move the upwardly indented position shown in Figure 4 In the lower position of the milling wheel 22, in which the milling wheel 22 protrudes downward relative to the intermediate frame 60 with the tensioning device 50. For this purpose, the pressure cylinder 32 can be retracted, such as by Figure 4 Learned.

[0048] To hold the wall slotting device 10 , a holding device 14 is arranged in the upper region, with which the wall slotting device 10 can be fastened to a supporting cable or a supporting rod. Figure 5 The holding device 14 shown in more detail in FIG. 1 can have a shaft 15 and can be supported on the base frame 12 in a displaceable manner relative to the base frame 12 in the longitudinal direction via a sleeve-like linear guide 13 and fixed to a crossbeam 42. The crossbeam 42 is fixedly connected to an intermediate frame 60 with a tensioning device 50 via one or more longitudinal beams 40. The wall slotting device 10 is thus held via the holding device 14 and the intermediate frame 60, wherein the base frame 12 can be freely displaced in the longitudinal direction relative to the holding device 14 by means of the clamping cylinder 32. For guidance in the milled groove, a guide plate 11 can be arranged on the outside of the base frame 12. The guide plate 11 can be controllable and displaceable in order to align the wall slotting milling machine 10 in the milled groove.

[0049] In the following, we also combine Figure 6 and Figure 7 The functioning principle of the wall slotting milling machine 10 described above and the method according to the invention for producing a slot in the ground are explained in more detail.

[0050] exist Figure 6 In the embodiment, the lower area of ​​the wall slotting device 10 according to the present invention is in contact with Figures 1 to 3 The corresponding state is shown in which the plate-shaped tensioning elements 52 of the tensioning device 50 can be retracted so that the wall groove device 10 can move freely in the groove in the ground. The tensioning cylinder 32 of the tensioning device 30 is extended here, wherein the intermediate frame 60 is moved to the lower end of the support section 16.

[0051] In order to tension the wall groove device 10 in the groove in the ground, the tensioning device 50 is activated. Here, an adjustment element (preferably a transversely directed hydraulic cylinder) arranged in the receiving portion 70, which is not visible, is extended, wherein the plate-shaped tensioning element 52 is pressed against the surrounding ground wall.

[0052] like Figure 7 As shown in FIG, as soon as the intermediate frame 60 is held force-fittingly on the surrounding earth wall by the tensioning device 50, the holding device 30 can be activated. In this case, the holding cylinder 32 is retracted, wherein the base frame 12 together with the support section 16 and the earth removal device 20 are pressed downwards by the resulting pulling movement of the holding cylinder 32, since the intermediate frame 60 is fixed by the extended tensioning element 52. In this way, in the suspended and height-adjustable wall groove device 10, in addition to the weight force of the displaceably supported base frame 12 and the earth removal device 20, an additional force can be exerted downwards on the earth removal device 20 by the holding cylinder 32. This can be advantageous, for example, when milling hard earth, in particular rock material.

[0053] The weight of the wall slotting apparatus 10 can be fully or partially absorbed by the tensioning device 50 and directed into the surrounding ground. This can be advantageous in the case of soft ground, for example if the ground is highly compressed due to excessive downward force, which can make removal difficult. Figure 8 As shown in FIG, the intermediate frame 60 with the tensioning device 50 can be held on the carrying rope 5 of the carrying unit 1 via the longitudinal beams 40 and the holding device 14. The carrying unit 1 can be a mobile crane with a cantilever. Via the carrying unit 1, the required liquids can be supplied and discharged through hose lines and supplies, as well as energy supply.

Claims

1. A wall slotting device for constructing a slot in the ground, the wall slotting device comprising: - a basic frame (12), which extends in a longitudinal direction; - at least one soil removal device (20) arranged at the lower end region of the basic frame (12); - a holding device (14) for holding the wall groove device (10) at its upper end region; a tensioning device (50) having at least two tensioning elements (52) which are arranged opposite to each other and are movable in the laterally direction, transversely to the longitudinal direction, and at least one adjusting element, by means of which the tensioning element (52) can be extended laterally in the groove in order to tension at least a part of the wall groove device (10); - an intermediate frame (60) on which the tensioning device (50) with the at least two tensioning elements (52) and the at least one adjustment element is arranged; and a pressing device (30), by means of which a pressing force can be exerted on the at least one soil removal device (20); - wherein the holding down device (30) is arranged between the intermediate frame (60) and the basic frame (12), so that by means of the holding down device (30), the basic frame (12) can be displaced relative to the intermediate frame (60); - wherein the retaining device (14) is fixedly connected to the intermediate frame (60); and - wherein the basic frame (12) with the soil removal device (20) is displaceable relative to the holding device (14); It is characterized in that - the intermediate frame (60) is supported displaceably along the basic frame (12) in the lower region of the basic frame (12), and The holding device (14) is fixedly connected to the intermediate frame (60) via one or more longitudinal beams (40) extending along the basic frame (12).

2. The wall slotting device according to claim 1, characterized in that: The holding device (14) is attached to a crossbeam (42) which is arranged in the upper region of the basic frame (12), and A linear guide (13) is arranged in the region of the crossbeam (42), by means of which the base frame (12) is displaceably guided relative to the holding device (14).

3. The wall slotting device according to any one of claims 1 to 2, characterized in that: - the tensioning device (50) has at least two adjustment elements arranged perpendicularly to the longitudinal direction, wherein at least one first adjustment element is supported on the one hand on the intermediate frame (60) and on the other hand on a first tensioning element (52), and at least one second adjustment element is supported on the one hand on the intermediate frame (60) and on the other hand on a second tensioning element (52), the second tensioning element being arranged opposite the first tensioning element (52), and The first adjustment element and the second adjustment element can protrude perpendicularly to the longitudinal direction.

4. The wall slotting device according to any one of claims 1 to 3, characterized in that: The intermediate frame (60) is displaceably supported on the base frame (12) in a lower region on a support section (16), which has a reduced cross section relative to the base frame (12) while forming at least one free space (17).

5. The wall slotting device according to claim 4, characterized in that: Two lateral free spaces (17) are formed on the bearing section (16), and two receptacles (70) for adjustment elements are correspondingly formed on the intermediate frame (60).

6. The wall slotting device according to claim 5, characterized in that: At least one receptacle (70) on the intermediate frame (60) is box-shaped and has at least one first adjustment element and at least one second adjustment element.

7. The wall slotting device according to any one of claims 1 to 6, characterized in that: A control device is provided, by means of which the first adjusting element and the second adjusting element can be extended in a defined manner.

8. The wall slotting device according to any one of claims 1 to 5, characterized in that: The holding down device (30) is arranged above the tensioning device (50) and has at least one, preferably a plurality of, holding down cylinders (32).

9. The wall slotting device according to claim 8, characterized in that: Each holding cylinder (32) is arranged on the one hand on the base frame (12) and on the other hand on the intermediate frame (60) or on the tensioning element (52).

10. The wall slotting device according to claim 8 or 9, characterized in that: The hold-down cylinder (32) is arranged obliquely to the vertical, wherein the base frame (12) with the soil removal device (20) can be pressed downward relative to the tensioned intermediate frame (60) by actuating the hold-down cylinder (32).

11. The wall slotting device according to any one of claims 1 to 10, characterized in that: The wall slotting device is designed as a wall slotting milling machine, wherein the soil removal device (20) has at least one milling wheel (22).

12. The wall slotting device according to any one of claims 1 to 10, characterized in that: The wall trenching device is designed as a wall trenching gripper, wherein the soil removal device (20) has a grab blade.

13. Method for constructing a trench in the ground using a wall trenching device (10) according to any one of claims 1 to 12, characterized in that - holding the wall groove device (10) at the upper end region by means of a holding device (14); - removing soil during trench construction by means of at least one soil removal device (20), which is arranged at the lower end region of the basic frame (12); - by means of a tensioning device (50) at least two adjusting elements directed perpendicularly to the longitudinal direction are used to extend at least two opposite tensioning elements (52) in the lateral direction, wherein at least a part of the wall groove device (10) is tensioned in the groove; - applying a pressing force to the at least one soil removal device (20) by means of a pressing device (30); - the tensioning device (50) with the at least two tensioning elements (52) and the adjusting element is arranged on an intermediate frame (60), the holding device (14) is arranged on the intermediate frame, and the basic frame (12) is supported displaceably relative to the intermediate frame (60) and the holding device (14); - the intermediate frame (60) is tensioned and fixed relative to the ground by means of the tensioning device (50); and The base frame (12) with the soil removal device (20) is pressed downwards by means of the holding-down device (30) and displaced relative to the intermediate frame (60) and the holding device (14).

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