EP3208384B1 - Groove wall device and method for making grooves in the ground - Google Patents

Description

The invention relates to a slot wall device for creating slots in the ground for a slot or sealing wall, with a carrier device on which a Bodenabtragseinheit is mounted vertically adjustable, according to the preamble of claim 1.
The invention further relates to a method for creating slots in the ground with a slot wall device, wherein a Bodenabtragseinheit lowered into the ground while soil material is removed, according to the preamble of claim 11th
Slit wall devices for creating slots in the ground have long been among others from the document DE 10 2004 013 790 A known. As Bodenabtragseinheit these have a so-called trench wall cutter or a so-called diaphragm wall grab. The soil removal unit is usually arranged vertically adjustable on a mast or a boom. The masts or extension arms on the carrier devices usually have a height of 15 to 30 m or more.
Slot or sealing walls can reach depths of 100 m and more. They serve to prevent horizontal water flow, if, for example, an excavation pit is excavated. A sealing wall prevents the lateral inflow of groundwater into the excavation. With sealing walls can also be prevented that water from a landfill or a storage lake seeped laterally into the ground.
In certain cases, it is necessary to create a sealing wall in or near a building, in a tunnel or in other confined spaces. For this purpose, carrier devices with large masts are not suitable.

From the EP 0 518 297 B1 For example, a particularly compact slot wall device for creating slots is known. This trench wall device in this case has a rail-guided car with a frame and a boom, which is only slightly higher than a vertical length of a trench wall cutter. A cable drum for a carrying cable and connecting cable and a hose reel for a supply hose are mounted close to the ground on the support frame. This known diaphragm wall device can be used due to the compact design in spaces with limited height.

From the EP 2 423 388 A1 shows a method and an apparatus for producing a trench wall, in which a plurality of rod-shaped mixing elements together with cutting elements, which are arranged on a vertical rod, are abteufbar vertically along a mast in the ground. The vertical bar must have at least a length corresponding to the depth of the slot. Soil material can be processed simultaneously over the entire slot depth via the cutting elements. In order to absorb the resulting transverse forces, it is taught to provide a separate vehicle with supporting and pressing elements in addition to the carrier device with the mixing and removal unit. The support and pressing elements are directly connected to the rod-shaped mixing and Abtragseinheit in the slot to support them laterally from behind.

From the GB 2 374 884 A For example, an excavating apparatus is known which has an excavating means that is slidable and rotatable about an axis.

The invention has for its object to provide a slot wall device and a method for creating slots in the ground for a slot or sealing wall in the ground, with which a slot or sealing wall can be efficiently created even in very limited space conditions.

The object is achieved according to the invention on the one hand by a slot wall device with the features of claim 1 and on the other hand with a method having the features of claim 11. Preferred embodiments of the invention are specified in the respective dependent claims.

The slot wall device according to the invention is characterized in that a first carrier device and a second carrier device are provided, which are connected to one another via a yoke, and that the Bodenabtragseinheit is arranged adjustable below the yoke.

A basic idea of the invention is, as it were, to support a soil removal unit between two carrier devices on a yoke, which is supported on the two carrier devices. Thus, the carrier devices can be made relatively small and compact in each case. The load can be distributed to the two carrier devices on both sides. Compared with a conventional one-sided suspension of a soil removal unit on only one carrier device, the usual risk of tipping can basically be largely avoided in a central suspension between two carrier devices. Thus, the carrier devices can be significantly smaller and also formed largely without the usual considerable counterweights at the rear of a single carrier device. Overall, therefore, a particularly compact diaphragm wall device is achieved, which can be used for example in tunnels, under bridges or overpasses and in buildings with ceilings. Due to the good force distribution but even very heavy soil removal units or high diaphragm wall devices can be operated efficiently. The two carrier devices are in particular mobile and can be referred to as a carrier vehicle.

The soil removal unit may in principle be any suitable device, such as a diaphragm wall grab. According to one embodiment of the invention, it is particularly preferred for the soil removal unit to be a trench wall cutter with at least one pair of cutting wheels which can be driven to rotate about horizontal axes of rotation. Particularly preferably, two pairs of cutting wheels are arranged. A trench wall cutter with rotating cutting wheels allows a continuous sinking of the slot into the ground. Milled soil material can be removed via a suction hose from the slot or remain in the slot, wherein the milled soil material in the slot with a supplied liquid, in particular a concrete suspension, is mixed. The thus formed mixture of soil material and concrete suspension can cure to the desired slot or sealing wall.

In principle, the soil removal unit can be mounted on a linkage, in particular a telescopic linkage on the yoke. A particularly compact design is achieved according to a development of the invention in that the Bodenabtragseinheit is suspended from at least one support cable. The trench wall device may have a height which substantially corresponds to the height of the soil removal unit or is only slightly larger.

According to a further embodiment variant of the invention, it is preferred that the soil removal unit is connected to at least one supply hose and / or at least one cable. Hydraulic fluid, support fluid, concrete suspension or any other gaseous or flowable medium can be supplied to the soil removal unit in the slot via the supply hose (s). Furthermore, worn soil material from cutting wheels can be pumped out of the slot via a corresponding disposal hose. Via one or more cables, a corresponding electrical power supply and data lines for controlling the soil removal unit can be provided. For energy supply, an internal combustion engine can be provided on at least one of the carrier devices, which supplies all other units, such as hydraulic drives, pumps, etc., to the carrier devices and the soil removal unit with energy. Alternatively, an external power supply, such as a power cable, may be provided.

In this case, the invention is preferably further developed in that at least one cable drum and at least one hose reel are provided for the at least one carrying cable and / or the at least one cable at least one cable drum. The ropes, cables or hoses can be efficiently and compactly stored and operated via the corresponding drums.

Here, a preferred embodiment of the invention is that the cable drum are rotatably mounted on the first carrier device and the hose reel on the second carrier device. Cable drum and hose reel are thus functionally separated and arranged on different carrier devices. This leads to a uniform weight distribution and facilitates the supply of the trench wall device.

In principle, the preferably U- or C-shaped yoke can be formed as a rigid beam element. An improved movability of the slot wall device is achieved according to the invention in that at least one pivot joint is provided on the yoke. The swivel joint points while a substantially vertical pivot axis, so that the two carrier devices are mutually adjustable and adjustable. This allows a simplified method of the trench wall device around corners and improves the overall handling of the entire device.

A further improvement of the mobility is achieved according to an embodiment of the invention in that at least one carrier device has an undercarriage, on which an upper carriage is rotatably mounted. Preferably, both carrier devices have an undercarriage with rotatably mounted superstructure.

In principle, the carrier devices can be designed as a wheeled vehicle or a rail vehicle. According to one embodiment of the invention, it is particularly expedient that at least one of the carrier devices is designed as a crawler vehicle with its own drive. The carrier device can be self-propelled. In a single driven carrier device, the other carrier device can passively be moved without its own drive. It is particularly preferred, however, that both carrier devices are designed as a tracked vehicle with its own drive. In this case, the carrier devices, at least their undercarriage, formed substantially the same. As a result, a particularly good maneuverability of the overall device and an efficient method is possible even in very narrow spatial conditions, as can occur in tunnels.

Preferably, one or both carrier devices are provided with an operating unit. The control unit may include a closed cab or a simple control station.

For a particularly compact embodiment variant of the invention, it is preferred that a mobile operating unit is provided. Thus, the carrier devices can be moved by one or more operators remotely controlled. This allows a particularly accurate method of carrier equipment, as the operator can be located with a mobile control unit directly at critical positions. The mobile operating unit may preferably be a control panel or, in a particularly simple embodiment variant, a tablet computer with a corresponding user interface. The connection to the carrier device can be wireless or with a cable respectively. The at least one operating unit is preferably releasably attached to the carrier or devices and can be removed by the operator.

The inventive method is characterized in that the Bodenabtragseinheit is disposed at a yoke between a first carrier device and a second carrier device, which are connected to each other via the yoke. The method can be carried out in particular with the previously described slot wall device. It result in the implementation of the method according to the advantages described above.

A preferred method variant of the invention is that the slot is carried out in a tunnel, a track or other space with limited ceiling height. In addition, the process can also be carried out efficiently in channels or other spaces with narrow lateral boundaries.

Furthermore, it is provided according to an embodiment of the invention that a slot or sealing wall is formed, wherein the slots are formed coherently and filled with a curable composition. The slots are initially created spaced apart from each other and filled with a curable composition. In a second overflow then the spaces between the individual diaphragm wall segments are dug and filled with a curable material. The individual slots and slot wall segments are connected together and can create a continuous slot or sealing wall. The individual slot wall segments can be provided with metal reinforcements as long as the filling compound has not yet cured with a concrete material.

Fig. 1

eine Seitenansicht einer erfindungsgemäßen Schlitzwandvorrichtung;

Fig. 2

eine Draufsicht von oben auf die Schlitzwandvorrichtung von Fig. 1; und

Figuren 3a bis 3h

Draufsichten auf eine erfindungsgemäße Schlitzwandvorrichtung beim Verfahren um eine Ecke.

The invention will be further described by means of preferred embodiments, which are shown schematically in the drawings. In the drawings show:

Fig. 1

a side view of a slot wall device according to the invention;

Fig. 2

a top view of the slot wall device of Fig. 1 ; and

FIGS. 3a to 3h

Top views of a slot wall device according to the invention in the process around a corner.

The trench wall device 10 according to FIGS Figures 1 and 2 has a first carrier device 20 and a second carrier device 30, which each have a crawler undercarriage 22, 32. On the first undercarriage 22, a first superstructure 24 is arranged with a frame-like first structure 26 via a pivot bearing 23. In a corresponding manner, a second superstructure 34 is rotatably mounted on the second undercarriage 32 of the second carrier vehicle 30 via a pivot bearing 33. At the second superstructure 34, a rack-like first structure 36 is attached.

The first carrier vehicle 20 and the second carrier vehicle 30 are connected to each other via a bar-shaped yoke 12. For this purpose, a first horizontally projecting yoke member 17 is attached to an upper portion of the first structure 26 of the first carrier vehicle 20, which is coupled via a pivot joint 19 with a vertically directed pivot axis with a second yoke member 18. The protruding second yoke member 18 is fixedly secured to an upper portion of the second structure 36 of the second host vehicle 30 in a corresponding manner. The yoke 12 forms with the two structures 26, 36 of the two carrier vehicles 20, 30 a gate-like arrangement, with a free or intermediate space in which a soil working unit 50 is suspended.

The Bodenabtragseinheit 50 is formed in the illustrated embodiment as a trench cutter with an approximately rectangular frame 56, at the lower end two pairs of cutting wheels 51, 52 rotatably mounted about horizontal axes of rotation 53, 54 are stored. On the frame 56 of the soil removal unit 50, a pump 58 is arranged, via which either a hardening suspension can be injected into the area between the cutting wheel pairs 51, 52 or via which removed soil material can be sucked out of the milling slot with surrounding support liquid. On the frame 56 also not shown hydraulic drives for driving the Fräsradpaare 51, 52 are attached.

The pump 58 is connected to a supply hose 16, which is guided via a four-circular roller arch 37 on the yoke 12 to a hose drum 38 is. The hose reel 38 is rotatably supported about a horizontal axis of rotation on the second structure 36 of the second carrier vehicle 30.

The suspension of the soil removal unit 50 on the yoke 12 via at least one support cable 14 which is attached to a suspension 57 at the upper end of the frame 56. The carrying cable 14, together with a plurality of cables 15, which comprise power and data lines, are guided in ribbon form via a rotatable deflection roller 27 on the yoke 12 to a cable drum 28 on the first carrier device 20. The cable drum 28 is rotatably mounted in the first structure 26 of the first carrier device 20 about a horizontally directed axis of rotation.

With the slot wall device 10, a slot can be created in the ground, wherein the Bodenabtragseinheit 50 is lowered at rotating Fräsradpaaren 51, 52 in the ground. In this case, the support cable 14, the cable 15 and the supply hose 16 are tracked by rolling from the cable drum 28 and the hose drum 38. The thus forming in the bottom slot is preferably filled with a support suspension, which is introduced via a pump, not shown in the slot. After reaching the final depth of the soil removal unit 50 is pulled back up, with the support cable 14, the cable 15 and the supply hose 16 are rolled up again. Subsequently, the slot wall device 10 is moved further to create another slot. The thus created and filled slots form after hardening of the filling compound a continuous slot and sealing wall in the ground.

From the FIGS. 3a to 3h It can be seen that the trench wall device 10 according to the invention with the two carrier vehicles 20, 30 can be moved and routed very well even in limited space conditions. So is in accordance with Fig. 3a the slot wall device 10 according to the invention in a tunnel-like main section 5, in which a transverse section 7 opens approximately at right angles. In this case, an approximately rectangular corner region 6 is formed between the walls 8.

For retraction into the transverse section 7, the slot wall device 10 is moved along the main section 5, wherein the first carrier vehicle 20 and the second carrier vehicle 30 are rectified. As soon as the second carrier vehicle 30 lying in front in the direction of travel is at the level of the middle of the opening transverse stretch 7, the undercarriage 32 of the second carrier vehicle 30 is rotated by corresponding actuation of the crawler tracks by 90 ° to the unchanged superstructure 34, as in Fig. 3b is shown.

Now, the second carrier vehicle 30 can retract in the direction of the transverse path 7 in this.

In this retraction, the first undercarriage 22 of the first carrier device 20 remains in its longitudinal orientation to the main line 5. However, with increasing retraction of the second carrier vehicle 30 in the transverse section 7, the two upper carriage 24, 34 with respect to their respective undercarriage 22, 32, wherein a deflection takes place at the pivot joint 19 on the yoke 12 of the slot wall device 10. In this case, the first yoke part 17 is increasingly angled to the second yoke part 18, as in the FIGS. 3c to 3f is shown.

The Fig. 3f shows a rectangular arrangement of the first carrier vehicle 20 to the second carrier vehicle 30, wherein in this right angle Anstellposition the respective uppercarriage 24, 34 are again rectified in their longitudinal orientation to the respective undercarriage 22, 32.

It is now possible for the second carrier vehicle 30 to travel parallel to the transverse line 7 while the first carrier vehicle 20 is moved further parallel to the longitudinal direction of the main line 5 until the first carrier vehicle 20 is at the level of the middle of the opening transverse line 7, as in FIG Fig. 3g is shown. In this method, the first superstructure 24 of the first carrier vehicle 20 pivots into the transverse path 7.

Upon reaching the in Fig. 3g shown position is now the first undercarriage 22 of the first carrier vehicle 20 by correspondingly opposite operation of the crawlers of the first sub-carriage 22 is rotated by 90 ° relative to the superstructure 24 until the first undercarriage 22 as well as the first superstructure 24 rectified to the longitudinal direction of the transverse path 7 and the second carrier vehicle 30 are. From this in Fig. 3h shown position, the re-aligned straight slit wall device 10 can now be moved further into the transverse path 7, wherein along the transverse section 7, a slot or a slot wall can be created.

Claims (13)

1. Diaphragm wall device for producing trenches in the ground for a diaphragm or cut-off wall, with a carrier implement, on which a ground removal unit (50) is supported in a vertically adjustable manner,
   wherein a first carrier implement (20) and a second carrier implement (30) are provided which are connected to each other via a cross member (12), and
   wherein the ground removal unit (50) is arranged in an adjustable manner below the cross member (12),
   characterized in that
   on the cross member (12) at least one pivot joint (19) is provided which has a substantially vertical pivot axis,
   wherein the pivot joint (19) is adapted for adjusting both carrier implements (20, 30) with respect to each other.
2. Diaphragm wall device according to claim 1,
   characterized in that
   the ground removal unit (50) is a diaphragm wall cutter with at least one pair of cutting wheels (51, 52) which can be driven in a rotating manner about horizontal axes of rotation (53, 54).
3. Diaphragm wall device according to claim 1 or 2,
   characterized in that
   the ground removal unit (50) is suspended on at least one support rope (14).
4. Diaphragm wall device according to any one of claims 1 to 3,
   characterized in that
   the ground removal unit (50) is connected to at least one supply hose (16) and/or at least one cable (15).
5. Diaphragm wall device according to claim 3 or 4,
   characterized in that
   for the at least one support rope (14) and/or the at least one cable (15) at least one rope drum (28) is provided and for the at least one supply hose (16) at least one hose drum (38) is provided.
6. Diaphragm wall device according to claim 5,
   characterized in that
   the rope drum (28) is supported in a rotatable manner on the first carrier implement (20) and the hose drum (38) is supported in a rotatable manner on the second carrier implement (30).
7. Diaphragm wall device according to any one of claims 1 to 6,
   characterized in that
   at least one carrier implement (20, 30) has an undercarriage (22, 32), on which an upper carriage (24, 34) is supported in a rotatable manner.
8. Diaphragm wall device according to any one of claims 1 to 7,
   characterized in that
   at least one of the carrier implements (20, 30) is designed as a crawler-type vehicle with a drive of its own.
9. Diaphragm wall device according to any one of claims 1 to 8,
   characterized in that
   one or both carrier implements (20, 30) are provided with an operating unit.
10. Diaphragm wall device according to any one of claims 1 to 9,
    characterized in that
    at least one mobile operating unit is provided.
11. Method for producing trenches in the ground with a diaphragm wall device (10), in particular according to any one of claims 1 to 10, wherein a ground removal unit (50) is lowered into the ground and in doing so ground material is removed,
    wherein the ground removal unit (50) is arranged on a cross member (12) between a first carrier implement (20) and a second carrier implement (30) which are connected to each other via the cross member (12),
    characterized in that
    for adjustment of both carrier implements (20, 30) with respect to each other at least one pivot joint (19) with a substantially vertical pivot axis is arranged on the cross member (12).
12. Method according to claim 11,
    characterized in that
    the trench is carried out in a tunnel, a track (5, 7) or another space with limited ceiling height.
13. Method according to claim 11 or 12,
    characterized in that
    a diaphragm or cut-off wall is formed, wherein the trenches are designed in a continuous manner and filled with a hardenable mass.

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