SOIL WORKING DEVICE AND METHOD FOR CREATING A SUBSTANTIALLY VERTICAL HOLE IN THE GROUND

Abstract

The invention relates to a soil working device for creating a substantially vertically running hole in the ground, which hole is provided with a slurry, said soil working device having a base body, a connection apparatus which is arranged on an upper end region of the base body, and a soil removal apparatus and/or a soil displacement apparatus, which is arranged on a lower end region of the base body. According to the invention is intended that, at a lower region of the base body, a first pressure measuring apparatus for measuring a first ambient pressure is arranged, and that at an upper region of the base body, which is vertically spaced apart from the lower region, a second pressure measuring apparatus for measuring a second ambient pressure is arranged. The invention also comprises a method for creating a substantially vertical hole in the ground by means of such a soil working device.

Claims

1. A soil working device for creating a substantially vertically running hole in the ground, which hole is provided with a slurry, said soil working device having a basic body, a connection apparatus which is arranged at an upper end region of the basic body, and a soil removal apparatus and/or a soil displacement apparatus which is arranged at a lower end region of the basic body, wherein at a lower region of the basic body a first pressure measuring apparatus for measuring a first ambient pressure is arranged, and at an upper region of the basic body, which is vertically spaced apart from the lower region, a second pressure measuring apparatus for measuring a second ambient pressure is arranged.

2. The soil working device according to claim 1, wherein the first pressure measuring apparatus and/or the second pressure measuring apparatus comprise at least one hollow measuring body which is filled with a measuring fluid.

3. The soil working device according to claim 2, wherein the measuring body comprises at least one flexible measuring surface that is in contact with the environment.

4. The soil working device according to claim 2, wherein the measuring body is of tubular configuration.

5. The soil working device according to claim 2, wherein the measuring body is arranged substantially horizontally.

6. The soil working device according to claim 1, wherein the first pressure measuring apparatus and the second pressure measuring apparatus are in fluidic connection by means of a connection line, and a sensor apparatus is arranged on the connection line, with which sensor apparatus a pressure difference between a first pressure at the first pressure measuring device and a second pressure at the second pressure measuring device can be sensed.

7. The soil working device according to claim 1, wherein this is designed as a removal-type drilling tool, a displacement-type drilling tool or a trench wall cutter.

8. A soil working implement, wherein to create a hole in the ground, a soil working device according to claim 1 is arranged in a vertically adjustable and drivable manner.

9. The soil working implement according to claim 8, wherein a carrier unit is provided having an upper carriage which is rotationally mounted on a mobile undercarriage.

10. The soil working implement according to claim 8, wherein a control unit is provided which has a data connection to the first pressure measuring apparatus, the second pressure measuring apparatus and/or the sensor apparatus.

11. The soil working implement according to claim 10, wherein the control unit is configured to control a vertical movement and/or a rotational drive of the soil working device depending on data which are transmitted from the first pressure measuring apparatus, the second pressure measuring apparatus and/or the sensor apparatus.

12. The soil working implement according to claim 10, wherein the control unit is configured to determine a filling level based on the data about the pressure at the soil working device.

13. A method for creating a substantially vertical hole in the ground by means of a soil working device according to claim 1, wherein the hole is filled with a slurry during creation, and by means of the first pressure measuring apparatus, a first ambient pressure in a lower region of the soil working device is measured and by means of the second pressure measuring apparatus, a second ambient pressure in an upper region of the soil working device is measured.

14. The method according to claim 13, wherein the first pressure measuring apparatus is fluidically connected to the second pressure measuring apparatus by means of a connection line and a sensor apparatus is arranged on the connection line, with which sensor apparatus a pressure difference between a first pressure at the first pressure measuring device and a second pressure at the second pressure measuring device is sensed.

Description

[0028] The invention is hereinafter described on the basis of a preferred exemplary embodiment, which is schematically depicted in the attached drawings. The drawings show:

[0029] FIG. 1 a perspective view of part of a soil working device according to the invention; and

[0030] FIG. 2 a detail of the soil working device of FIG. 1 relating to a pressure measuring arrangement.

[0031] A soil working device 10 according to the invention, which is designed as a drilling bucket, is explained in connection with FIGS. 1 and 2. For reasons of clarity, a tubular housing, which surrounds a basic body 12, has been omitted from the soil working device 10. At the bottom side of the basic body 12, a base 14 is arranged, which has, on its bottom side, a soil removal apparatus 30. Via an opening, not shown, in the base, removed soil material can be received in an inner receiving space on the basic body 12. The base 14 is mounted pivotable about a horizontally oriented pivot axis 15. Thus, the base 14 can be pivoted open downwardly to empty the drilling bucket.

[0032] The housing around the basic body 12 is covered towards the top by a cover plate 18 on which a connection apparatus 20 is attached for connection to a drill pipe. In the shown exemplary embodiment, the connection apparatus 20 is designed as a so-called Kelly box, which can receive a square-shaped end of a drill pipe. A drill pipe can thus be received and secured torque proof in the sleeve-like connection apparatus 20 by means of transversely oriented locking bolts.

[0033] According to the invention, the soil working device 10 is provided with a pressure measuring arrangement 40 which has a first pressure measuring apparatus 41 at a lower region of the base body 12 and a second pressure measuring apparatus 42 at an upper region of the basic body 12. The lower first pressure measuring apparatus 41 has a first hollow measuring body 45a which is constructed annularly from three tubular elements. The outer measuring element pointing outwards is designed in an arc-shaped manner corresponding to an outer circumferential radius of the basic body 12. In particular, at an inner side of the first hollow measuring body 45a, a flexible measuring surface 48 can be arranged which, corresponding to an external pressure, possibly deforms with removed soil material as a result of slurry in situ, and thus transfers an external pressure to an inner measuring fluid.

[0034] The first hollow measuring body 45a is designed parallel to the horizontal base 14 and can be in contact, via a recess in the base 14, with an outer side or an external environment. A corresponding recess is also formed in the cover plate 18, wherein a chan-nel 17 is formed through an inner wall 16 along the basic body 12, through which sus-pension as slurry can flow along the basic body 12.

[0035] The upper second pressure measuring apparatus 42 has a second annular hollow measuring body 45b which is formed from four tubular elements. The second hollow measuring body 45b extends here annularly around the connection apparatus 20 at the top side of the cover plate 18. The second hollow measuring body 45b is also designed with a flexible measuring surface for sensing an external ambient pressure, wherein the ambient pressure can be transferred to an inner measuring fluid.

[0036] The first pressure measuring apparatus 41 and the second pressure measuring apparatus 42 are fluidically connected by means of a connection line 44 which extends axially along the basic body 12. To protect the connection line 44, the inner wall 16 is provided, which largely delimits and protects the connection line 44 and also the first pressure measuring apparatus 41 on the base 14 from removed soil material in the interior of the basic body 12. On the cover plate 18, a sensor apparatus 50 is connected at the connection line 44, with which sensor apparatus a pressure difference between the first pressure measuring apparatus 41 and the second pressure measuring apparatus 42 can be identified.

[0037] The sensor apparatus 50 can have a conventional pressure sensor or also a flowmeter which identifies a movement of the measuring fluid in the pressure measuring arrangement 40 due to different pressures at the first measuring apparatus 41 and the second measuring apparatus 42. Furthermore, pressure sensors can be arranged at each of the two pressure measuring apparatuses 41, 42, with which pressure sensors a re-spective absolute pressure can be ascertained. The sensor apparatus 50 and the further sensors are connected to a control unit of a soil working implement, not shown, wherein corresponding to the ascertained pressure values, the control unit controls a vertical movement of the soil working device 10 and/or a rotational drive for rotating the soil working device 10.

[0038] In the exemplary embodiment shown, the pressure measuring apparatuses 41, 42 are arranged on an outer side. If a sensing of the filling level is desired, the first pressure measuring apparatus 41 can be arranged in the internal receiving space of the basic body 12.