EP3114283B1 - Boring device for producing a bore, and system for positioning the boring device - Google Patents

Description

The invention relates to a drilling device for creating a hole for a foundation pile for the foundation of a structure in a body of water with a base body consisting of at least a first and a second body, which are arranged one above the other and movable against one another, the movement being provided via a feed device with a drilling tool which is arranged on an arm movably connected to the lower body on the underside thereof, with a tensioning device which is designed for tensioning the drilling device in the foundation pile, which is arranged with a first end on the upper body and at its second end has as an abutment acting clamping element, the tensioning device having an arm on which the clamping element is arranged, the arm of the tensioning device being pivotable by means of a drive from a first position to a second position in which the clamping element with the wall of the Foundation pile is engaged. Furthermore, the invention relates to a system for positioning a drilling device for creating a hole for a foundation pile for the foundation of a structure in a body of water in the foundation pile, as well as a control and a method therefor.

When constructing structures that support their foundations in or on ground that is under water, these foundations are produced in different ways, whereby the use of so-called monopiles, i.e. individual piles, has prevailed for one-piece foundations. An alternative to this is the so-called jacket, which is a pyramidal structure, or tripods, each with several foundation points. Such structures are, for example, wind turbines or bridge structures.

According to the prior art, so-called jack-up rig is provided at the installation site, for example, the working level of which is provided with a swivel mechanism. The pile is clamped into this swivel mechanism, diverted from the horizontal to the vertical and lowered to the sea floor by opening the clamps. The pile is then driven into the ground using a ram.

From the WO 2010/139380 A1 a drilling device is known which, starting from a work platform, is lowered into a vertical foundation pile. The drilling device has an arm, at the end of which a drilling roller is arranged, with which the soil located in or below the bored pile is removed and then the bored pile is then lowered into the cavity.

From the WO 2013/081455 A1 a drilling device is also known, as described at the beginning. The drilling device has a base body consisting of two parts which can be displaced relative to one another by means of a hydraulic cylinder. An arm is arranged on the lower base body, at the end of which there is a drill head. This is used to loosen and remove the rock / soil in or below the pile. The housing is braced against the foundation pile. For this purpose, pivotable arms are provided, at the end of which clamping elements are provided. To clamp the drilling device in the pile, the arms are pivoted outwards via hydraulic cylinders until the clamping elements come into engagement with the pile. The bracing devices are arranged at the upper and at the lower end of the outer housing part of the drilling device. It has been found that the tensioning devices are in need of improvement. Furthermore, it has also been found that the drilling device is in need of improvement with regard to the directional accuracy during drilling and with regard to the positioning in the foundation pile.

The object of the invention is to improve the positioning and the bracing of the drilling device in the foundation pile.

With regard to the drilling device, the object according to the invention is achieved in that a guide device is provided which is designed to guide the drilling device in the foundation pile, which is arranged with a first end on the lower body and which has a sliding element at its second end, that the guide device has a Has arm on which the sliding element is arranged, the arm of the guide device being pivotable by means of a drive from a first position to a second position, in which the sliding element is in engagement with the wall of the foundation pile.

Parallel to the arm of the tensioning device is a handlebar with the same length as the arm, which is connected on both sides to the arm in parallelogram fashion by means of a connecting element such that the clamping element is connected to the connecting element in such a way that the parallelogram consisting of arm, handlebar and connecting elements is arranged that the clamping element is aligned with the central axis of the drilling device and thus parallel to the wall of the foundation pile, that a guide device is provided which is designed to guide the drilling device in the foundation pile, which is arranged with a first end on the lower body and at its second end has a sliding element that the guide device has an arm on which the sliding element is arranged, the arm of the guide device being pivotable by means of a drive from a first position to a second position in which the sliding element is in engagement with the wall of the foundation pile t.

Surprisingly, it has been found that the provision of a guide device on the lower body of the drilling device in conjunction with the bracing on the upper body of the drilling device improves the directional accuracy during drilling, but at the same time, although the guide device slides in the pile, the dynamic load transfer in the foundation pile is significantly improved. This also improves drilling precision.

Another teaching of the invention provides that the guide device is designed such that the sliding element lies flat against the inner wall of the foundation pile in the extended state and / or that the bracing device is designed such that the clamping element is flat against the inner wall of the foundation pile in the extended state is present. The positioning of the drilling device in the foundation pile is improved by the fact that the elements lie flat against the inner wall of the foundation pile. Furthermore, the dynamic load transfer into the foundation pile is significantly improved in a simple manner.

Another teaching for more precise positioning and for better transfer of the loads arising during drilling provides that a handlebar with the same length as the arm is arranged parallel to the arm of the guide device and / or the tensioning device, which is parallelogram-like with the arm on both sides via a connecting element is connected that the sliding element and / or clamping element is connected to the respective connecting element, that the parallelogram of arm, handlebar and connecting elements is arranged such that the sliding element or the clamping element is aligned with the central axis of the drilling device and thus parallel to the wall of the foundation pile.

Another teaching of the invention provides that there is an opening angle between the arm of the tensioning device and / or arm of the guide device and the respective body, which opens in the direction of the drill head. This causes a self-jamming of the drilling device in the foundation pile, which can be released in a simple manner in the event of failure of the respective means for pivoting both the tensioning device and the guide device and at the same time in this case also ensures a secure hold of the drilling device in the foundation pile.

A further teaching of the invention provides that the drive for pivoting the arm of the tensioning device and / or the arm of the guide device is at least one hydraulic cylinder. A further teaching of the invention provides that the sliding element is arranged so as to be pivotable relative to the arm and / or that the drive element of the guide device acts on the sliding element. Another teaching of the invention provides that the clamping element is provided with a friction lining and / or that the sliding element is provided with a sliding lining. This results in simple actuation and maintenance of the guide device and the clamping device.

Another teaching of the invention provides that the feed device is at least one hydraulic cylinder.

A further teaching of the invention provides that the arm of the drilling tool can be pivoted via a rotary element and at least one linear drive, preferably a hydraulic cylinder. This is simple ensures that the entire area to be drilled can be reached with the drilling device.

Another teaching of the invention provides that the drilling head is a drilling head rotating about the longitudinal axis of the arm, preferably a cutting head with drilling tools such as cutting elements or chisels. This causes a good loosening of the soil.

A further teaching of the invention provides that the clamping element has a support surface on a lower side provided essentially at right angles to the friction side, in which a sensor, preferably a hydraulic cylinder, is preferably provided in the direction of the deepest hole. The provision of the sensor makes it possible in a particularly simple manner to carry out the positioning of the drilling device in the foundation pile more precisely.

With regard to the system, the object of the invention is achieved in that the drilling device has radially movable clamping elements with respect to an inner wall of the foundation pile, that the foundation pile has at least one positioning element provided on the inner wall of the pile, and that the clamping element of the drilling device has at least one contact surface with at least one contact sensor for determining the contact between the positioning element and the clamping element.

This makes it particularly easy to achieve precise positioning in the foundation pile.

Another teaching of the invention provides that the positioning element is a lug or has a lug. This also makes it possible to transfer the load of the drilling device into the foundation pile.

A further teaching of the invention provides that the positioning element is designed such that the static load of the drilling device can be transferred to the positioning element via the bearing surface of the clamping element.

Another teaching of the invention provides that one positioning element is provided for each clamping element of the drilling device.

Another teaching of the invention provides that the sensor is a hydraulic cylinder. By providing the sensor, it will open particularly simple way possible to make the positioning of the drilling device in the foundation pile more precise.

Another teaching of the invention provides that a control described below is provided.

Furthermore, the object according to the invention is provided with a positioning element on the inner wall of the pile by a method for positioning the drilling device, preferably according to the previously described embodiment and / or in connection with a previously described system, in a foundation pile for establishing a structure in a body of water that the drilling device is inserted and lowered into the foundation pile with non-engaging clamping elements, that the drilling device is aligned in the foundation pile so that the clamping elements are radially aligned with the positioning elements, that the drilling device is lowered to above the positioning elements, the clamping element is moved radially, until contact is made with the inner wall of the foundation pile, the clamping elements being arranged so as to be movable relative to the borehole wall, so that the drilling device is lowered, until a sensor is arranged in the clamping elements n Contact with the positioning elements is determined that the drilling device is lowered until the positioning elements at least partially bear the static load of the drilling device and that the clamping elements are moved against the inner wall of the foundation pile, so that the dynamic load acting on the drilling device during drilling occurs the stake is transferable.

Furthermore, the object according to the invention is achieved by a control for positioning a drilling device, preferably according to the previously described embodiment and / or in connection with a previously described system, in particular for carrying out the previously described method, which is carried out such that after the drilling device in the pile has been inserted and lowered, the clamping elements of the drilling device being arranged such that they are not in engagement with the inner wall of the pile, the drilling device is aligned in the pile, so that the clamping elements are radially aligned with position elements located on the inner wall of the drilling device, that the drilling device is lowered to above the positioning elements, that the clamping elements are moved in the direction of the borehole wall until contact is made with the borehole wall, the clamping elements being slidably movable relative to the inner wall of the pile, that the drilling device g is lowered until over in sensors arranged in the clamping elements, contact with the positioning elements is determined, that the drilling device is lowered until the positioning elements at least partially bear the static load of the drilling device, and that the clamping elements are extended in relation to the inner wall of the foundation pile in such a way that they touch the drilling device during drilling acting dynamic load is transferable to the pile.

Fig.1

eine räumliche Seitenansicht einer erfindungsgemäßen Bohrvorrichtung mit ausgefahrener Führungs- und Verspannvorrichtung,

Fig. 2

eine räumliche Seitenansicht einer erfindungsgemäßen Bohrvorrichtung mit eingefahrener Führungs- und Verspannvorrichtung,

Fig. 3

eine vergrößerte räumliche Ansicht des oberen Abschnitts zu Fig. 1,

Fig. 4

eine vergrößerte räumliche Ansicht des oberen Abschnitts zu Fig. 2,

Fig. 5

eine alternative Ansicht zu Fig. 4

Fig. 6

eine räumliche vergrößerte Ansicht des unteren Abschnitts zu Fig. 1,

Fig. 7

eine alternative räumliche vergrößerte Ansicht des unteren Abschnitts zu Fig. 1,

Fig. 8

eine räumliche vergrößerte Ansicht des unteren Abschnitts zu Fig. 2,

Fig. 9

eine alternative räumliche vergrößerte Ansicht des unteren Abschnitts zu Fig. 2,

Fig. 10

eine Draufsicht zu Fig. 1,

Fig. 11

eine Draufsicht zu Fig. 2,

Fig. 12

eine Detailansicht des erfindungsgemäßen Systems, und

Fig. 13

eine weitere Detailansicht des erfindungsgemäßen Systems.

The invention is explained in more detail below on the basis of a preferred exemplary embodiment in conjunction with a drawing. Show:

Fig. 1

3 shows a three-dimensional side view of a drilling device according to the invention with the guide and tensioning device extended,

Fig. 2

2 shows a spatial side view of a drilling device according to the invention with the guide and tensioning device retracted,

Fig. 3

an enlarged spatial view of the upper section Fig. 1 ,

Fig. 4

an enlarged spatial view of the upper section Fig. 2 ,

Fig. 5

an alternative view to Fig. 4

Fig. 6

a spatial enlarged view of the lower section Fig. 1 ,

Fig. 7

an alternative spatial enlarged view of the lower section Fig. 1 ,

Fig. 8

a spatial enlarged view of the lower section Fig. 2 ,

Fig. 9

an alternative spatial enlarged view of the lower section Fig. 2 ,

Fig. 10

a top view too Fig. 1 ,

Fig. 11

a top view too Fig. 2 ,

Fig. 12

a detailed view of the system according to the invention, and

Fig. 13

a further detailed view of the system according to the invention.

Fig. 1 and Fig. 2 show a drilling device 10 with a base body 11, which has an upper body 12 and a lower body 13. On the lower body 13, an arm 14 is arranged, at the lower end of which there is a drill head 15. The arm 14 is rotatably connected to the lower body 13 via a rotating member 16. Furthermore, it is pivotally connected to the rotary element 16 via a joint 17. Furthermore, a hydraulic cylinder 18 is provided, which is also connected via a joint 19 on the upper side to the rotary element 16 and its lower side via a joint 20 to the arm 14. The arm 14 - drilling head 15 combination can be rotated in the direction of rotation A by the rotating element 16. The drilling head 15 can be pivoted in the pivoting direction b by the hydraulic cylinder 18. The drilling head 15 rotates in the direction of rotation C about the central axis of the arm 14.

A tensioning device 21 is provided on the upper body 12 (see also Fig. 3 and Fig. 4 ), which has four bracing elements 21a with an arm 22, which is composed of two arm sections 22a, 22b, each of which is connected to the upper body 12 by a joint 23, 23a. The joints 23, 23a are arranged on an axis 24, on each of which a connecting element 25, 25a engages. A hinge 26 is provided on the outside of the connecting elements 25, 25a, in which a link 27 arranged parallel to the arm 22 is provided, composed of link sections 27a, 27b. The link sections 27a, b combine to form a third link section 27c. A connecting element 28 is provided on the outside of the arm 22 and is connected to the arm 22 via a joint 29. The link 27 is connected to the connecting element 28 via a joint 32. Handlebar 27, arm 22, connecting element 28 and connecting element 25 form a parallelogram. Handlebar 27 and arm 22 have the same length. The same also applies to the connecting elements 25, 28. A clamping element 30 is arranged on the connecting element 28, on the outside of which a friction lining 31 is provided. In the embodiment shown in the figures, the connecting element 28 is made in one piece with the clamping element 30. At the top of the connecting element 28 or the clamping element 30, the joint 32 is provided that connects the link 27 to the clamping element 30 and thus to the connecting element 28.

A hydraulic cylinder 33 is articulated between the upper body 12 and arm 22, via which the tensioning device 21 or the individual Bracing element 21a is moved in the pivoting direction D. Because arm 22, connecting element 25, handlebar 27 and connecting element 28 or clamping element 30 form a parallelogram, the friction lining 31 arranged on the outer surface of clamping element 30 remains parallel to the inner wall of the foundation pile when pivoted in direction D, so that it pivots is moved away from the body 12 flat against the inner wall of the foundation pile.

A guide device 34 is arranged on the lower body 13 (see 6 to 9 ). This has four guide elements 34a. The guide element 34a has an arm 35 which is pivotably arranged on the lower body 13 via a joint 36. A sliding element 38 is provided on the outer end of the arm 35 via a joint 37, on the outwardly facing surface of which a sliding coating 39 is arranged. Parallel to the arm 35 there is a link 40 which is connected to the lower body 13 via a joint 41 and to the sliding element 38 via a joint 42. The distance between joint 41 and joint 36 and the distance between joint 42 and joint 37 are the same and the spacing distances themselves are parallel to one another, so that here too there is a parallelogram construction, so that the sliding lining 39 is arranged parallel to the inner wall of the foundation pile , remains parallel when the guide device 34 is pivoted in the direction E or its arm 35. Two hydraulic cylinders 43, 44 are articulated on the sliding element 38 and pivot the sliding element 38 in the pivoting direction E outwards towards the inner wall of the foundation pile.

Between the upper body 12 and lower body 13 there is a feed element 45 (see Fig. 5 ) arranged in the form of a hydraulic cylinder. By means of this feed element 45, the lower body 13 can be moved in the feed direction F with respect to the upper body 12.

The drilling device 10 is inserted and lowered into the foundation pile by means of a lifting device (not shown). The tensioning device 21 and the guide device 34 are folded in (see Fig. 2 , Fig. 4 , Fig. 5 , Fig. 8 , Fig. 9 and Fig. 11 ). If the drilling device 10 is arranged at the intended drilling position in the foundation pile, the bracing device 21 is extended (see Fig. 1 , Fig. 3 and Fig. 10 ) by actuating the hydraulic cylinders 33 so that the clamping elements 30 with the friction linings 31 are pressed against the inner wall of the foundation pile until sufficient force is applied to the inner wall of the foundation pile so that the dynamic loads arising from drilling and possibly also the static load of the drilling device 11 h is transferred to the foundation pile via the tensioning device 21.

At the same time, the guide devices 34 are also extended by actuating the hydraulic cylinders 43, 44 (see Fig. 1 , Fig. 6 , Fig. 7 and Fig. 10 ), so that the sliding elements 38 with the sliding linings 39 lie against the inner wall of the foundation pile, as in FIG Fig. 10 is shown. The dashed circle 53 shows the inner wall of the foundation pile. The force applied is such that the lower body 13 is movable with respect to the foundation pile and is guided at the same time. The drill head 15 is then set in rotation and the arm 14 is rotated and pivoted via the rotary element 16 and the hydraulic cylinders 18. In parallel, the lower body 13 is lowered relative to the upper body via the feed elements 45. A stable drilling feed and thus a correct drilling direction is ensured via the guide device 34.

If the feed elements 45 are fully extended, they are retracted again in the direction of the upper body 12, so that the lower body 13 and thus the drill head 15 move back into the foundation pile. When the feed elements 45 are completely retracted, the drill head is in a safe position within the foundation pile. The foundation pile is then lowered into the cavity produced by the drilling device 10 and the drilling process is carried out again until the drilling has reached the intended depth at which the foundation pile is to be arranged.

In order to ensure that the drilling device 10 is arranged in the correct position within the foundation pile, positioning elements 46 are arranged in the corresponding position on the inner wall of the foundation pile (see 12 and 13 ). These have a base 47 which is provided on the wall. Furthermore, a support surface 48 is provided at right angles to it. A lug 49 is provided to stabilize the support surface 48 with respect to the base 47. The base surface 47 can also be omitted, so that the support surface 48 and the peg 49 are attached directly to the inner wall of the foundation pile. A sensor 50 is provided on the connecting element 28 or the clamping element 30, which is as in FIG 12 and 13 preferably shown, is a hydraulic cylinder.

If the drilling device 10 has arrived in the drilling position within the foundation pile, the clamping element 30 is placed against the base 47 by extending the cylinder 33 and pivoting in direction D and the hydraulic cylinder 50 is extended over the outer extent of the clamping element 30. The drilling device 10 is then lowered further until the hydraulic cylinder 50 comes into contact with the support surface 48 of the positioning element 46. The lowering of the drilling device 10 is continued until the piston 51 of the cylinder 50 is retracted and a contact surface 52 rests on the bearing surface 48 of the positioning element. Alternatively, the pressure generated when the cylinders 50 are retracted and the position of the pistons 51 are monitored. If a target pressure of the cylinders 50 is reached and the pistons 51 are then in a predetermined position, then the drilling device 10 is in the desired position in the foundation pile. The static load of the drilling device 10 is then removed via contact surfaces 55 of the hydraulic cylinder 50 on the piston 51. The hydraulic cylinder 33 is then actuated further and the clamping element 30 is braced against the base surface 47. The bearing surface 48 and the peg 49 are designed such that they can bear the static load of the drilling device 10. This load is introduced into the positioning element 46 via the contact surface 52.

In Fig. 11 the smallest circumference of the drilling device 10 is also represented by a dashed circle 54. This represents the smallest cross-section through which the drilling device 10 can be guided if foundation piles with different diameters are used for the foundation.

Reference list

10th Drilling device 34a Guide element 11 Basic body 35 poor 12th upper body 36 joint 13 lower body 37 joint 14 poor 38 Sliding element 15 Drill head 39 Sliding surface 16 Rotating element 40 Handlebars 17th joint 41 joint 18th Hydraulic cylinder 42 joint 19th joint 43 Hydraulic cylinder 20 joint 44 Hydraulic cylinder 21st Tensioning device 45 Feed element / hydraulic valve 21a Bracing element ylinder 22 poor 46 Positioning element 22a Arm section 47 Floor space 22b Arm section 48 Contact surface 23 joint 49 Knagge 23a joint 50 Sensor / hydraulic cylinder 24th axis 51 piston 25th Fastener 52 Contact area 25a Fastener 53 dashed circle / inner wall 26 joint Foundation pile 27 Handlebars 54 dashed circle / smallest 27a Handlebar section Circumference of 27b Handlebar section Drilling device 28 Fastener 55 Contact area 29 joint 30th Clamping element 31 Friction lining 32 joint 33 Hydraulic cylinder 34 Guide device A Direction of rotation B Swivel direction C. Direction of rotation D Swivel direction E Swivel direction F Feed direction

Claims (14)

1. Boring device for producing a bore for a foundation pile for the foundation of a construction in a body of water, having a basic body (11) which consists of at least one first and one second body (12, 13), which bodies are arranged one above the other and are movable toward one another, wherein the movement is provided via a feeding device, having a boring tool (15) which is arranged on an arm (14) which is movably connected to the lower body (13) on the underside thereof, having a tensioning device (21) which is designed for tensioning the boring device (10) in the foundation pile, which is arranged with a first end on the upper body (12) and which comprises at its second end a clamping element (30) which functions as an abutment, wherein the tensioning device (21) comprises an arm (22) on which the clamping element (30) is arranged, wherein the arm of the tensioning device (21) is pivotable by means of a drive from a first position to a second position where the clamping element is situated in engagement with the wall of the foundation pile, characterized in that a guide device (34) is provided which is designed to guide the boring device (10) in the foundation pile, which is arranged with a first end on the lower body (13) and which comprises a sliding element (38) on its second end, in that the guide device (34) comprises an arm (35) on which the sliding element (38) is arranged, wherein the arm (35) of the guide device is pivotable by means of a drive from a first position to a second position where the sliding element (38) is situated in engagement with the wall of the foundation pile.
2. Boring device according to Claim 1, characterized in that the guide device (34) is realized such that the sliding element (38) abuts flatly against the inside wall of the foundation pile in the extended state and/or in that the tensioning device (21) is realized such that the clamping element (30) abuts flatly against the inside wall of the foundation pile in the extended state.
3. Boring device according to Claim 1 or 2, characterized in that a driver (27, 40) with the same length as the arm (22, 35), which is connected to the arm (22, 35) in the manner of a parallelogram on both sides respectively via a connecting element (28), is arranged parallel to the arm (22, 35) of the guide device (34) and/or of the tensioning device (21), in that the sliding element (38) and/or the clamping element (30) is connected to the respective connecting element (28), in that the parallelogram produced from arm (22, 35), driver (27, 40) and connecting elements (28) is arranged such that the sliding element (38) or the clamping element (30) is oriented to the centre axis of the boring device (10) and consequently parallel to the wall of the foundation pile.
4. Boring device according to one of Claims 1 to 3, characterized in that an opening angle, which opens in the direction of the boring head (15), exists between arm (22) of the tensioning device (21) and/or arm (35) of the guide device (34) and the respective body (12, 13).
5. Boring device according to one of Claims 1 to 4, characterized in that the drive for pivoting the arm (22) of the tensioning device (21) and/or the arm (35) of the guide device (34) is at least one hydraulic cylinder (33, 43, 44), and/or the feeding device is at least one hydraulic cylinder (45).
6. Boring device according to one of Claims 1 to 5, characterized in that the sliding element (38) is arranged so as to be pivotable in relation to the arm (35), and/or in that the drive element of the guide device (34) cooperates with the sliding element (38).
7. Boring device according to one of Claims 1 to 6, characterized in that the clamping element (30) is provided with a friction lining (31), and/or in that the sliding element (38) is provided with a sliding lining (39) .
8. Boring device according to one of Claims 1 to 7, characterized in that the arm (154) of the boring tool (15) is pivotable via a rotary element (16) and at least one linear drive, in a preferred manner a hydraulic cylinder (18), and/or in that the boring head (15) is a boring head which rotates about the longitudinal axis of the arm (14), in a preferred manner a cutting head with boring tools.
9. Boring device according to one of Claims 1 to 8, characterized in that on a lower side which is provided substantially at right angles to the friction side (31), the clamping element (30) comprises a support surface in which a sensor (50), in a particularly preferred manner a hydraulic cylinder (50), is provided in a preferred manner in the direction of the lowest point of the bore hole.
10. System for positioning a boring device (10) for producing a bore for a foundation pile for the foundation of a construction in a body of water, including the boring device according to one of Claims 1 to 9 and a foundation pile, characterized in that the boring device (10) comprises clamping elements (30) which are radially movable in relation to an inside wall of the foundation pile, in that the foundation pile comprises at least one positioning element (46) provided on the inside wall of the pile, and in that the clamping element (30) of the boring device comprises at least one support surface with at least one contact sensor (50) for detecting the contact between the positioning element (46) and the clamping element (30).
11. System according to Claim 10, characterized in that the positioning element (46) is a cleat or comprises a cleat, and/or in that one positioning element (46) is provided per clamping element (30) of the boring device (10) .
12. System according to Claim 10 or 11, characterized in that the positioning element (46) is designed such that the static load of the boring device (10) is transferrable to the positioning element (46) via the supporting surface of the clamping element (30), and/or in that the sensor (50) is a hydraulic cylinder (50).
13. System according to one of Claims 10 to 12, characterized in that a controller is provided for carrying out the method according to Claim 14.
14. Method for positioning a boring device (10) with a system according to one of Claims 10 to 13 in a foundation pile for the foundation of a construction in a body of water, where a positioning element (46) is provided on the inside wall of the pile, in that the boring device (10) is inserted and lowered into the foundation pile with non-intrusively arranged clamping elements (30), in that the boring device (10) is oriented in the foundation pile so that the clamping elements (30) align radially with the positioning elements (46), in that the boring device (10) is lowered to above the positioning elements (46), the clamping elements (30) are moved radially until contact is made with the bore hole wall, wherein the clamping elements (30) are arranged so as to be movable in a grinding manner in relation to the bore hole wall, in that the boring device is lowered until contact with the positioning elements (46) is ascertained via sensors (50) arranged in the clamping elements (30), in that the boring device (10) is lowered until the positioning elements (46) carry the static load of the boring device (10) at least in part, and in that the clamping elements (30) are moved against the inside wall of the foundation pile so that the dynamic load acting on the boring device (10) during the boring process is transmittable to the pile.

Images