EP2703564B1 - Guide frame for guiding a milling device - Google Patents

Description

The invention relates to a guide frame for guiding a milling device and a method for anchoring a pipe in the ground according to the preamble of claim 13.

A generic guide frame and a generic method for anchoring a pipe go out of the US-A-4742876 out. In a waterbed, a pipe is first driven into it. Subsequently, the interior of the tube is milled by means of a conventional slot wall milling device. In this case, the trench wall milling device is guided over a guide frame, which is attached to the top of the tube. The milling cross section of the slot wall milling device is to be largely matched to the pipe cross section.

Trench wall-milling devices, also called trench wall milling, have long been known and are used to create slot or sealing walls in the ground. The trench wall Fräsvorrichung has a box-shaped frame, at the lower end of which rotationally driven cutting wheels are arranged, as it is approximately from the DE 41 41 629 C2 evident. By vertical sinking of the slot wall milling device, a slot segment is formed with a rectangular milling cross section, which is filled with a curable composition. By juxtaposing a plurality of such diaphragm wall segments, the slot wall is created.

From the DE 10 2009 023 466 A1 For example, a shaft-making machine is known in which a single milling drum is provided. The single milling drum is pivotally mounted on a base frame via a telescopic arm. Due to the adjustability of the swivel arm, a relatively large work surface can be machined and milled with the individual milling roller.

From the JP-A-05171641 or the JP-A-62284818 go forth comparable manhole machines, which have one or more rotating milling heads, which are pivotally mounted on a base frame. The milling heads are rotatably driven in these milling devices about vertical axes of rotation.

Next is from the DE 20 2010 017 153 U1 a Abteufmaschine known with scraper chains, which are arranged radially and rotationally driven about a vertical axis of rotation.

In the construction of offshore wind energy systems, large pile tubes must be anchored as support structures in the seabed. As the size of the plants increases, the dimensions of the pile tubes are becoming ever larger. Depending on the application, diameters in the range of five to seven meters can be achieved.

The pile tubes are usually rammed by means of suitable piling in the seabed. Since the seabed is usually sufficiently soft, a ramming is basically possible even with relatively large pipe diameters. However, it may happen that there are hard rock layers or boulders in the soil, which make further ramming of the pipe considerably difficult or even impossible. Especially for pipes with a large diameter such rock layers or boulders can lead to considerable problems in anchoring.

The invention is therefore based on the object to provide a device by means of which the anchoring of a pipe in the ground can be supported. The invention is also based on the object of specifying an economical method for anchoring a pipe in the ground.

The object is achieved by a guide frame with the features of claim 1 and a method having the features of claim 13. Preferred embodiments of the invention are specified in the respective dependent claims.

The guide frame according to the invention for guiding a milling device within a tube inserted into the ground comprises a frame which is insertable into the tube and has a guide along which the milling device is displaceable, a clamping device for clamping and fixing the frame in the tube and an adjusting device with which the milling device is adjustable in a transverse direction to the tube axis within the tube.

The inventive method for anchoring a pipe in the ground comprises the steps of: ramming the pipe into the ground, inserting a guide frame with a milling device mounted therein into the pipe and lowering within the pipe, tightening the guide frame within the pipe and removing soil within the pipe Tube by rotationally driving at least one cutting wheel of the milling device and axial lowering of the milling device within the guide frame.

The guide frame according to the invention serves to guide a milling device axially within a pipe partially introduced into the ground in order to excavate and / or shred soil material inside or below the pipe. According to the invention, the introduction, in particular ramming, of the pipe into the ground can hereby be supported by, for example, crushing and / or removing hard material below the pipe, which impedes further driving in of the pipe, by means of the milling device. Such a hard material may be, for example, a foundling, which projects below the tube into the tube cross-section. After removal of the hard material or foundling, the pipe can be further introduced into the soil.

The pipe may in particular be a supporting mast to be anchored in the ground, for example for a wind energy plant, preferably an offshore wind energy plant. Such masts may have diameters of several meters, for example five meters or more. In a conventional embodiment, the mast tapers upwards, in particular above the water surface, since there lower forces act.

The milling device is a trench wall cutter with horizontally mounted cutting wheels and a substantially rectangular milling cross section. Such milling devices are well known and are commonly used for creating Frässchlitzen in the ground.

By means of the guide frame according to the invention, such a standard milling machine can also be used for excavating soil within a pipe introduced into the soil. In this case, an essential aspect is that the milling device has a smaller cross-section than the inner cross section of the tube section introduced into the bottom in order to be able to lift it into the tube through the tapered upper section.

A first basic idea of the invention is to guide the milling device axially within the tube, in order to remove soil by means of the smaller-diameter milling device in a defined subarea of the tube cross-section and reliably avoid damage to the tube. For this purpose, the milling device is axially displaceably mounted on a frame of the guide frame, so that it can be lowered relative to the frame during the milling process. The frame in turn can be firmly clamped within the cross section of the tube, so that a reliable guide is realized.

Another basic idea of the invention is to be able to adjust the milling device, in particular between individual milling operations, within the tube in the transverse direction. The adjustment provided for this purpose thus moves the milling device in a direction transverse to the tube axis pipe cross-sectional plane. This is based on the fact that the cross section of the milling device is smaller and usually has a different shape than the inner cross section of the tube in which the milling device is used. Due to the adjustment of the milling device within the tube targeted different portions of the pipe cross-section can be excavated. By repeatedly displacing the milling device, it is even possible to excavate soil in the region of the entire pipe cross-section.

According to the invention it is preferred that the adjusting device comprises a turning device, by means of which the milling device is rotatable within the tube. For example, an inner frame of the guide frame, on which the milling device is mounted, are rotated relative to an outer frame braced in the tube. On the other hand, it is particularly preferred that the entire guide frame, which is tensioned or clamped in the tube, is rotatable in the tube.

Preferably, the adjusting device comprises a displacement device by means of which the milling device is displaceable transversely to the tube axis. This can be provided for example by the fact that the frame is clamped by means of extendable clamping or spreading arms in the tube, wherein the clamping arms allow different radial positioning of the Fräsrahmens within the tube cross-section. In particular, opposing clamping arms can be provided, which are selectively different, so non-symmetrical to each other, are extendable.

In a preferred embodiment, at least one roller is provided, which rests for rotating the frame with the milling device to the tube axis on a tube inner wall of the tube and rolls. This makes it possible in a particularly advantageous manner, the entire guide frame with the milling device mounted thereon rotate within the tube. It is particularly preferred that the at least one roller is designed as a support roller, which is supported on the pipe inner wall and so carries the guide frame. In this case, the support roller can be preferably held by frictional engagement on the pipe inner wall. Furthermore, it is preferred that the support roller can be pressed against the pipe inner wall and thus forms a part of the clamping device, with which the guide frame is clamped in the pipe. In this way, the guide frame can be rotated during the clamped state in the tube. Particularly preferably, several rollers are provided.

Preferably, at least one rotary drive is provided, with which the at least one roller for generating a rotational movement of the frame can be driven. In this way it is particularly easy to realize a rotation of the clamped or freely suspended on a supporting cable device.

In a preferred embodiment of the invention, the at least one roller for contacting the pipe inner wall relative to the frame frame is radially extendable. The radially extendable roller allows on the one hand a distortion of the frame within the tube and on the other hand an adaptation to different pipe cross-sections.

The clamping device preferably has at least one clamping element, which is radially extendable relative to the frame. For extending the clamping element, for example a clamping or clamping jaw, a hydraulic cylinder may be provided. The clamping element can also be formed by the support roller, so that in the clamped state, a rotation of the guide frame is possible.

It is according to the invention that the frame has a stop by means of which the guide frame can be supported on the milling device. Thus, the guide frame can be put on the milling device and supported by this or wear. Preferably, a cable suspension is provided on the milling device, with which it can be hung on a support device. This makes it possible to provide for lowering or raising the guide frame no separate lifting device. Instead, the guide frame can be held over the milling device and inserted into the tube or pulled out of it.

Furthermore, it is preferred that the cutting device for undercutting a region below a tube wall of the tube can be arranged and guided obliquely within the tube. For this purpose, it is particularly preferred that the entire guide frame within the tube obliquely, that is transversely to a longitudinal axis of the tube, can be arranged. If the guide frame is arranged in a lower region of the pipe, an obliquely routable milling device can be used to mill off an area underneath the pipe wall in order, for example, to crush or remove hard rock like a foundling there. For the oblique arrangement of the milling device, the guide frame preferably comprises differently extendable clamping arms.

It is also preferred that at least one roller is provided, which rolls upon rotation of the frame around the tube axis on a tube inner wall of the tube and that the at least one roller is mounted radially extendable on a relative to the frame radially extendable clamping element. As a result, either a fixed tension or a tension, in which the guide frame is rotatable within the tube, can be set. On the one hand, the frame can be firmly clamped inside the tube by means of the radially extendable clamping element, for example a clamping jaw. On the other hand, instead of the tensioning element, the roller, in particular support roller, can be used for tensioning the guide frame. For this purpose, the roller mounted on the tensioning element can be extended radially relative to the tensioning element so that it projects radially beyond the contact surface of the tensioning element.

For supplying the adjusting device and / or the tensioning device with a hydraulic fluid, a hydraulic connection can be provided on the guide frame, which can be coupled to a hydraulic connection of the milling device. The guide frame can thus be supplied with hydraulic fluid via the milling device, which is connected to a hydraulic unit. A separate hydraulic supply of the guide frame is then not required.

The invention further relates to a device for removing soil within an at least partially introduced into the ground or rammed pipe. The device comprises a guide frame according to the invention and a milling device which is mounted on the guide frame and comprises a milling frame and at least one cutting wheel mounted on the milling frame. The unit consisting of the milling device and guide frame is provided in particular for excavating soil within a pipe, in particular a supporting mast or pile pipe to be anchored in a soil. The milling device may in particular be a standard milling machine, for example a trench wall cutter. The guide frame is adapted to be placed on such a standard router and held by this.

Preferably, a cable suspension is provided on the milling device. With this, the milling device can be suspended on a carrier cable via a carrying cable. With regard to the method according to the invention, it is preferred that further steps are provided: adjusting the milling device in a transverse direction to the tube axis within the tube, in particular turning and / or moving the milling device within the tube, and removing soil along a different milling cross section within the tube by rotationally driving the at least one cutting wheel of the milling device and axially lowering the milling device within the guide frame. In particular by multiple adjustments of the milling device within the tube cross-section can be using the smaller diameter milling device approximately cancel the entire cross section of the tube. In this case, it is particularly preferred that the milling device is arranged eccentrically within the pipe cross-section and successively rotated within the pipe cross-section until the entire pipe cross-section is dug.

If necessary, the milling device can be inclined within the tube cross-section, ie inclined relative to the tube axis, clamped, and remove soil below the tube wall. This makes it particularly easy to remove an obstacle below the pipe wall.

Fig. 1:

eine Fräsvorrichtung in unterschiedlichen Ansichten;

Fig. 2:

einen erfindungsgemäßen Führungsrahmen in unterschiedlichen Ansichten;

Fig. 3:

einen erfindungsgemäßen Führungsrahmen in unterschiedlichen Ansichten mit einer darin eingesetzten Fräsvorrichtung;

Fig. 4:

eine in ein Rohr eingesetzte Vorrichtung zum Abtragen von Boden mit Führungsrahmen und Fräsvorrichtung in unterschiedlichen Ansichten;

Fig. 5:

eine Ausgangssituation eines erfindungsgemäßen Verfahrens;

Fig. 6:

einen ersten Schritt eines erfindungsgemäßen Verfahrens;

Fig. 7:

einen zweiten Schritt eines erfindungsgemäßen Verfahrens;

Fig. 8:

einen dritten Schritt eines erfindungsgemäßen Verfahrens;

Fig. 9:

eine Aufsicht auf ein im Boden zu verankerndes Rohr mit einer darin eingesetzten Vorrichtung zum Abtragen von Boden.

The invention will be further described with reference to preferred embodiments, which are illustrated in the accompanying schematic figures. Hereby shows:

Fig. 1:

a milling device in different views;

Fig. 2:

a guide frame according to the invention in different views;

3:

a guide frame according to the invention in different views with a milling device inserted therein;

4:

a device used in a pipe for removing soil with guide frame and milling device in different views;

Fig. 5:

a starting situation of a method according to the invention;

Fig. 6:

a first step of a method according to the invention;

Fig. 7:

a second step of a method according to the invention;

Fig. 8:

a third step of a method according to the invention;

Fig. 9:

a plan view of a pipe to be anchored in the ground with a device for removing soil inserted therein.

Identical or equivalent components are identified in all figures with the same reference numerals.

Fig. 1 shows a milling device 12 for removing soil, which in particular can also be referred to as a trench wall cutter and represents a standard milling machine. It shows Fig. 1a ) the milling device 12 in a first side view, Fig. 1b ) the milling device 12 in a second side view and Fig. 1c ) a top view of the milling device 12th

The milling device 12 comprises a milling frame 14, at the lower end of which a plurality of cutting wheels 16 are rotatably mounted in pairs about respective horizontal axes of rotation. The milling frame 14 comprises lateral guide surfaces 18, which extend along a vertical longitudinal axis 11. Furthermore, the milling frame 14 comprises a stop 20, on which an inventive guide frame 30 to be described below can be placed. The milling device 12 has a substantially rectangular cross-section.

At an upper end of the milling frame 14, a cable suspension 22 is provided, by means of which the milling device 12 to support cables 24 ( FIGS. 6 to 8 ) can be hung. For supplying the milling device 12 with hydraulic fluid, a hydraulic connection 26 is furthermore provided, to which hydraulic lines 28 can be connected ( FIGS. 6 to 8 ). The support cables 24 and the hydraulic lines 28 extend vertically from the milling device 12 up to a carrier, not shown, on which the milling device 12 is suspended.

FIGS. 2a) to 2c ) show a guide frame 30 according to the invention in views corresponding to Fig. 1 , The guide frame 30 has a frame 32, in which a receiving space 34 for receiving a milling device 12, as in Fig. 1 shown, is formed. The frame 32 includes an inner frame 37 having a rectangular cross section and a guide 36 for receiving and guiding the milling device 12 and two outer frames 38, each with a trapezoidal cross-section, arranged on opposite sides of the inner frame 37. The outer frames accommodate a clamping device 40 for clamping the frame frame 32 and an adjusting device 60 for adjusting the frame frame 32 within a tube 4.

On the frame 32 as part of the clamping device 40, a pivot lever 42 is pivotally mounted and pivotable between a retracted position within the cross section of the frame 32 and a laterally issued position. At an outer end of the pivot lever 42 or clamping arm is a clamping element 46, which may also be referred to as a clamping jaw or clamping shoe, for application to an inner wall of a pipe 4th (Figures 4 to 8 ) for clamping the guide frame 30 in the tube 4. The clamping or clamping element 46 has a curved clamping or clamping surface for application to the curved inner wall of the tube 4.

For pivoting the pivot lever 42, a clamping cylinder 44, in particular a hydraulic cylinder, is provided which is articulated on the one hand to the frame 32 and on the other hand on the pivot lever 42. The pivot point on the pivot lever 42 is located approximately centrally between the clamping element 46 and the axis of rotation of the pivot lever 42. The pivot point on the frame 32 is disposed above the pivot point of the pivot lever 42.

Again Fig. 2 can be seen, the clamping device 40 comprises opposing, in particular identically formed clamping units or pivot lever arrangements for clamping the guide frame in the tube 4. The clamping units can be differently and / or independently operable to eccentrically clamp the guide frame 30 in the tube 4. For this purpose, in particular one of the clamping elements 46 can be extended further relative to the cross section of the frame 32 than the respective other.

For a secure clamping within the tube 4 at least two pairs of clamping units, each with pivot lever 42, clamping cylinder 44 and clamping element 46, axially offset along the longitudinal axis 11 are arranged. Each clamping unit can be operated independently, so that the guide frame 30 by appropriate Positions of the clamping units can also be clamped obliquely to the tube axis 5 in the tube 4. The guide frame 30 thus comprises a pivoting device for tilting the guide frame 30 within the tube 4. For pivoting the guide frame 30 within the tube 4, the clamping elements 46 are extended at different heights of the guide frame 30 different degrees. This allows a guide of the milling device 12 obliquely to the tube axis 5, so that even an area below the tube wall can be edited, for example, to remove there a boulder.

The clamping elements 46 are pivotally mounted on the pivot lever 42 about a horizontal axis. For pivoting the clamping elements 46 relative to the pivoting lever 42, a pivoting device 48, in particular a pivoting cylinder, is provided. The pivoting of the clamping elements 46 is used in particular to adapt their orientation to the respective position of the pivot lever 42.

The clamping units to be operated differently can also be regarded as part of a displacement device 70 with which the guide frame 30 can be moved in a transverse direction to the tube axis 5 within the tube 4. The transverse displacement of the guide frame 30 can be effected in particular by different actuation of opposing clamping cylinders 44.

The guide frame 30 comprises, as part of the adjusting device 60, a turning device 62 with rollers 64 for application to an inner wall of the tube 4. At least one of the rollers 64 is rotatably driven by a rotary drive 66 to rotate the guide frame 30 within the tube 4 along the tube inner wall , Preferably, two of the four rollers are designed as driven rollers.

The rollers 64 are mounted on the frame 32 radially adjustable, so that they are adjustable between a retracted position in which they are withdrawn from the pipe inner wall, and an abutment position in which they rest against the pipe inner wall. To extend or retract the rollers an adjusting device 68, in particular a hydraulic cylinder is provided.

In the illustrated embodiment, the rollers 64 are mounted on the clamping elements 46. By means of the adjusting 68, the rollers 64 are opposite the clamping elements 46 radially movable between a position in which they protrude relative to the contact surface of the clamping elements 46 to the outside and a position in which they are withdrawn relative to the contact surface. The rollers 64 are in particular designed as carrying rollers and can hold the guide frame 30 by means of frictional engagement in the tube 4. The rollers 64 can thus also be regarded as part of the clamping device 40, wherein they serve as clamping elements for engagement with the pipe inner wall. The guide frame 30 can thus be clamped by radial extension of the rollers 64 in the tube 4 and, as it were twisted in the clamped state in the pipe.

The guide frame 30 is connected via a hydraulic connection 82 to a corresponding hydraulic connection 80 of the milling device 12. In Fig. 3 is in views similar to those of FIGS. 1 and 2 correspond, a guide frame 30 is shown with a milling device 12 inserted therein. The guide frame 30 is placed from above on the milling device 12 and rests on the milling frame 14. For this purpose, a stop 33 is provided with a downwardly directed abutment surface, by means of which the guide frame rests on the stop 20 of the milling frame 14. The milling device 12 thus carries the guide frame 30. The cutting wheels 16 of the milling device 12 protrude downward relative to the guide frame 30.

Fig. 4 shows in different views an inserted into a pipe 4 device 10 for removing soil, which comprises a milling device 12 with a guide frame 30 mounted thereon. The milling device 12 is held by carrying cables 24 by a carrier device, which may be located, for example, on a platform or a ship on the water surface 3. When the device 10 is lowered, the guide frame 30 rests on the stop 20 of the milling device 12 and is held over it.

The milling device 12 has a smaller cross section than the tube 4. For removing soil material within the tube 4, the guide frame 30 is clamped by means of the clamping device 40 in the tube 4. Like the left representations of the Fig. 4 can be seen, the frame 32 with the guide 36 eccentric, ie in a side region of the tube 4, clamp, so that the milling device 12 is guided eccentrically in the tube 4. With strained guide frame 30, the milling device 12 relative to the guide frame 30 for removing soil material can be moved downward, as in the upper representations of Fig. 4 shown.

An inventive method for introducing a pipe into the ground is the example of anchoring a foundation or pile pipe for an offshore wind turbine with respect to the FIGS. 5 to 8 described:

The pipe 4 of the offshore wind turbine is driven by means of an attachment hammer in the ground 1 or the seabed until it optionally encounters a boulder 2, as in Fig. 5 indicated schematically. The tube 4 comprises a larger diameter lower portion 8 and a smaller diameter upper portion 6. A water surface is designated by the reference numeral 3.

In order to remove the foundling 2, the device 10 according to the invention, which can also be referred to as a erratic bur, is used, which fits into the upper tapered opening of the pile tube.

The milling device 12 is inserted from above into the tube 4 and lowered by means of a support cable 24 to the bottom surface or to the seabed. The milling device is then clamped in the pile tube by means of the guide frame 30, which can also be referred to as a clamping and adjusting frame and rests on the milling device 12 ( Fig. 6 ).

By rotatably driving the cutting wheels 16 soil is removed, wherein the milling device 12 relative to the guide frame 30, in particular due to its own weight, moves down ( Fig. 7 ).

The pile tube is drilled in sections and by moving the milling device 12 by means of the guide frame 30. For this purpose, the milling device 12 can be offset laterally and / or by a certain amount, for example 90 °, are pivoted. For this purpose, the fixed tension of the guide frame 30 is released, the guide frame 30 is raised, offset and / or rotated and set again by means of the clamping elements 46.

Now, soil can be removed along a different cross-sectional area ( Fig. 8 ).

Upon reaching the pile tube end of the foundling 2 is milled and the milling device 12, in particular by their inclination, undercut the inner pile wall to improve the further penetration of the pile.

Fig. 9 shows a plan view of a tube 4 with a device 10 inserted therein for removing soil. As the figure can be seen, the clamping device 40 is fully retracted for bracing the guide frame 30 and is located within the cross section of the frame 32. The cross section of the frame 32 with retracted clamping device is dimensioned so that it in the tapered portion 6 of the pipe 4th fits.

Overall, the inventive device 10 and the corresponding method, the ramming of a tubular body in the ground, especially in a river bottom, be greatly simplified. This is a particularly economical construction of support structures in the ground, especially in the seabed, possible.

Claims (14)

1. Guide frame (30) for guiding a trench wall cutting apparatus (12) with a square cutting cross-section within a pipe (4) incorporated into the ground, having

   - a framework body (32) which comprises a guide (36), along which the cutting apparatus (12) can be displaced,

   characterized in that

   - the framework body (32) is insertable in the pipe (4) having a larger cross-section,

   - the framework body (32) comprises a receiving space (34) for receiving the trench wall cutting apparatus (12) and a stop (33), by means of which the framework body (32) is attachable and supportable on the trench wall cutting apparatus (12),

   - a bracing means (40) for tensioning and fixing the framework body (32) in the pipe (4) having the larger cross-section is provided and

   - an adjusting means (60) is provided, with which the trench wall cutting apparatus (12) can be adjusted within the pipe (4) in a transverse direction relative to the pipe axis (5).
2. Guide frame according to claim 1,
   characterized in that
   the adjusting means (60) comprises a rotating means (62), by means of which the trench wall cutting apparatus (12) can be rotated within the pipe (4).
3. Guide frame according to claim 1 or 2,
   characterized in that
   the adjusting means (60) comprises a displacement means (70), by means of which the cutting apparatus (12) can be displaced transversely relative to the pipe axis (5).
4. Guide frame according to one of claims 1 to 3,
   characterized in that
   at least one roller (64) is provided which lies against a pipe inner wall of the pipe (4) and rolls on it in order to rotate the framework body (32) with the cutting apparatus (12) around the pipe axis (5).
5. Guide frame according to claim 4,
   characterized in that
   at least one rotary drive (66) is provided, with which the at least one roller (64) can be driven to produce a rotation movement of the framework body (32).
6. Guide frame according to claim 4 or 5,
   characterized in that
   the at least one roller (64) can be radially extended relative to the framework body (32) in order to contact the pipe inner wall.
7. Guide frame according to one of claims 1 to 6,
   characterized in that
   the bracing means (40) comprises at least one bracing element (46) which can be radially extended relative to the framework body (32).
8. Guide frame according to one of claims 1 to 7,
   characterized in that
   the trench wall cutting apparatus (12) can be arranged and guided obliquely within the pipe (4) in order to undercut a region below a pipe wall of the pipe (4).
9. Guide frame according to one of claims 1 to 8,
   characterized in that
   at least one roller (64) is provided which rolls on a pipe inner wall of the pipe (4) upon rotation of the framework body (32) around the pipe axis (5), and
   the at least one roller (64) is mounted so that it can be radially extended on a bracing element (46) which can be radially extended relative to the framework body (32).
10. Guide frame according to one of claims 1 to 9,
    characterized in that
    in order to supply the adjusting means (60) and / or the bracing means (40) with a hydraulic fluid, a hydraulic connection (80) is provided on the guide frame (30) which can be coupled to a hydraulic connection (82) of the trench wall cutting apparatus.
11. Apparatus for removing ground within a pipe (4) at least partially incorporated into the ground, having

    - a guide frame (30) according to one of claims 1 to 10 and

    - a trench wall cutting apparatus (12) which is mounted on the guide frame (30) and comprises a cutting frame (14), on which multiple cutting wheels (16) are rotably mounted on horizontal rotation axe for forming a square cutting cross-section.
12. Apparatus according to claim 11,
    characterized in that
    a cable suspension (22) is provided on the trench wall cutting apparatus (12).
13. Method for anchoring a pipe (4) in the ground, comprising the following steps:

    - driving the pipe (4) into the ground and

    - removing ground (1) within the pipe (4) by driving in a rotating manner cutting wheels (16) of a trench wall cutting apparatus (12) and axially lowering the trench wall cutting apparatus (12) within the pipe (4),

    characterized in that

    - an apparatus according to claim 11 or 12 is used,

    - the guide frame (30) of the apparatus with the trench wall cutting apparatus (12) mounted thereon is inserted into the pipe (4) having the larger cross-section and lowered within the pipe (4), and

    - the guide frame (30) is tensioned within the pipe (4).
14. Method according to claim 13,
    characterized in that
    the following further steps are provided:

    - adjusting the trench wall cutting apparatus (12) in a transverse direction to the pipe axis (5) within the pipe (4), in particular rotating and/or displacing the cutting apparatus (12) within the pipe (4), and

    - removing ground (1) along a different cutting cross-section within the pipe (4) by driving in a rotating manner the cutting wheels (16) of the trench wall cutting apparatus (12) and axially lowering the cutting apparatus (12) within the guide frame (30).

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