EP0527460A2 - Method and device for drilling holes in soil or rock, particularly for the insertion of injection anchors - Google Patents

Abstract

The method of drilling holes in soil or rock, in particular for the insertion of injection anchors, provides for the hole to be drilled by a drill pipe string composed of sections (13), driven by a rotary and/or percussion drive (7) of a drilling device (1) and having a drill bit. The borehole wall is supported by a casing pipe composed of sections (17) and driven by a rotary and/or percussion drive (8) of the drilling device. The sections (13, 17) of the drill pipe string and casing pipe are mechanically removed from a magazine and are transferred back into the magazine after the hole is drilled. Each section (13) for the drill pipe string is received in succession from the magazine (12, 16) by the drive (6, 7) of the drilling device (1) for the drill pipe string, and each section (17) for the casing pipe is received in succession from the magazine (12, 16) by the drive (6, 8) of the drilling device (1) for the casing pipe. Each section for the drill pipe string and each section for the casing pipe are also transferred in succession back into the magazine. <IMAGE>

Description

3. The invention relates to a method for drilling holes in the ground or rock, in particular for the production of grout anchors, and a drilling device for performing this method with the features of the preamble of claim 1 and 3 respectively.

For example Drilling devices for making holes for grout anchors in the ground or in the rock are known. These have a caterpillar vehicle with a carriage which is articulated on articulated arms in all spatial axes. A magazine for several shots of the drill pipe is provided on such a drilling device. The drive for the drill pipe with drill bit, which can be raised and lowered on the carriage, is mechanically shot by shot of the drill pipe from this magazine. After drilling the holes and before inserting the grouting anchors, the shots of the drill pipe are transferred back into the magazine. It is disadvantageous that such a drilling device cannot be used to drill a borehole, which can also be used to support the borehole wall.

A drilling device is also already known which has a single magazine in which the shots of the drill pipe and the borehole piping are arranged concentrically one inside the other. The disadvantage here is that the borehole pipe sections and borehole casing sections are unnecessarily long. As a result, the construction of the drilling device is structurally complex and therefore unnecessarily expensive. The concentrically arranged shots of the drill string and the borehole piping are taken together from the magazine for drilling the hole, for example by a double-head drive, and transferred into the borehole. After drilling the borehole, the borehole linkage must be transferred shot by shot into the magazine before inserting the grout anchor. After inserting the grout anchor, the magazine is shot after shot of the drill string removed and transferred back into the magazine in a concentric arrangement with the drawn down casing pipe section. Returning the shots of the drill pipe and the well casing to the magazine is cumbersome and time consuming. A special drive for the shots is also required

Further known prior art always starts from constructions in which a single magazine is always used (DE 24 35 535 C2, DE-GM 18 88 205, DE-GM 87 14 952 U1, US 4,897,009; US 3,493,061 , SU 785 460). This single magazine is used for drill pipe sections, so that the effectiveness of these known devices is low.

The invention has for its object to provide a method and a drilling device for the production of boreholes in the ground or rock, which allows easier handling of the shots for the drill pipe and for the borehole piping and also enables the drill to be constructed simpler, therefore cheaper. An unnecessary height of the drill is to be avoided.

The invention solves this problem with the characterizing features of patent claims 1 and 3 respectively.

The invention offers the advantage that the shots of the drill pipe and the borehole piping can be taken separately from one another and chronologically in succession from a magazine and can be transferred back into this after drilling the hole for a compression anchor. In particular, the supply of the shots of the drill pipe and the casing pipe in the magazine is simplified according to the invention.

According to a preferred embodiment of the invention, separate magazines are used for the shots of the drill pipe and the well casing. These are preferably on the drill arranged one above the other. The shots are successively removed from the magazines moved into the aligned working position and then back into the outer position. They are transferred by the drives in a concentric arrangement into the drilling position, where they are connected to the end of the shots for the drill pipe and the borehole casing located in the borehole. After drilling and drilling the drill hole of a predetermined length, the drill pipe is transferred shot by shot into the associated magazine. The grouting anchor is then inserted into the still cased borehole. The borehole piping is then drawn shot by shot and transferred to the associated magazine. For this purpose, the magazines swivel into the working position and then back into the starting position.

Further refinements of the invention result from the subclaims.

Fig. 1

eine Seitenansicht des Bohrgerätes nach der Erfindung;

Fig. 2

eine Teil-Frontansicht von Fig. 1;

Fig. 3

eine Draufsicht nach der Linie III-III in Fig. 2;

Fig. 4

eine schematische Seitenansicht eines Magazins mit Arretiervorrichtung;

Fig. 5

eine Draufsicht auf eine Rollenführung;

Fig. 6

eine vergrößerte schematische Darstellung der Arretiervorrichtung in zurückgeschobener Position;

Fig. 7

die Ausführungsform nach Fig. 6 in vorgeschobener Arretierposition;

Fig. 8

eine schematische Seitenansicht einer Arbeitsbühne.

The invention is explained in more detail below with reference to an embodiment shown in the drawing. The drawing shows:

Fig. 1

a side view of the drilling device according to the invention;

Fig. 2

a partial front view of Fig. 1;

Fig. 3

a plan view along the line III-III in Fig. 2;

Fig. 4

a schematic side view of a magazine with locking device;

Fig. 5

a plan view of a roller guide;

Fig. 6

an enlarged schematic representation of the locking device in the retracted position;

Fig. 7

the embodiment of Figure 6 in the advanced locking position.

Fig. 8

a schematic side view of a working platform.

As usual, the drilling device 1 can have a tracked vehicle 2 with hydraulically actuated articulated arms 3. A carriage 4, which can be raised and lowered and can be moved in all spatial axial directions, is articulated thereon. A drive 6, which can be a duplex or double-head drive, is arranged on this. The drive head 7 of this drive 6 is used for rotary and / or impact drive for the drill pipe with drill bit. The drive head 8 of this drive 6 is used for rotary and / or percussion drive for the piping, possibly with a drill bit of the borehole, if e.g. a double head drive is used. With the duplex drive, the borehole piping and the borehole rods are rotated and / or struck at the same time.

The drill drive 6 is driven by a feed drive 9 on the carriage 4 so that it can be raised and lowered.

At the lower end 10 of the carriage 4 there is a breaking, clamping and guiding device 11 which is used to hold, unscrew and close the connections, e.g. Threaded connections, the shots of the drill pipe and the well casing serves. For example, Bayonet connections are used.

According to the invention, magazines 12 for the shots 13 of the drill pipe are preferably arranged on both sides next to the carriage. These magazines 12 are turret-shaped. The magazines 12 can be rotated about their central axis 14. They take several shots around the perimeter, freely removable from the outside. Each magazine can be swiveled inward into a working position (not shown) from the external storage position according to FIG. 3 via a swivel drive about the swivel axis 15. In this working position, the drive head 7 take up the aligned, assigned shot 13 of the drill pipe. After taking over the assigned shot 13, the magazine swings outward again into the supply position.

Below the magazines 12 for the shots of the drill pipe, magazines 16 for the shots 17 of the piping for the borehole are arranged in the same way on both sides of the mount 4. These magazines 16 are also turret-shaped. They are rotatable about the central axes 18. They take several shots of the piping for the borehole, freely distributed around their circumference. Each magazine can be moved from an external storage position into a working position via a swivel drive around a swivel axis 19, in which the assigned shot of the piping is aligned with the drive head 8.

After taking a shot 13 by the drive head 7, the drilling drive 6 is moved downwards. The drive head 8 takes over the aligned shot 17 of the borehole piping from the magazine 16 in the working position, which coaxially surrounds the shot 13 of the drill pipe as a tube.

The drill drive 6 then moves downwards after the magazine 16 returns to its supply position. The shots 13 and 17 are fixedly connected to the drill pipe or casing located in the borehole in a known manner using the breaking, clamping and guiding device 11. The rotary and / or impact drive of the drilling drive 6 is then actuated.

After completion of the borehole, the drill pipe is dismantled shot by shot. The shots 13 of the drill pipe are then moved to the height of the magazine 12. The magazines 12 are swung in. The shots 13 are then transferred into the magazines 12 in a suitable position. The magazines are then returned to their external storage position.

The grout anchor is then installed in the still piped borehole.

The piping is then dismantled shot by shot. The shots 17 of the piping are transferred into the magazines 16 in a similar manner as described above.

So that the length of the carriage is not too long and the drill is not too heavy, it is advisable to choose a length of approximately 2 m for the shots 13, 17.

In principle, it is also possible to accommodate the shots 13 for the drill pipe and the shots 17 for the borehole piping next to one another in a single magazine. Basically, the magazines do not have to be provided on the drill itself. They can also be placed in secondary positions, e.g. other vehicles.

When the magazine 13 is pivoted out of its supply position according to FIG. 3 into the working position by rotating about the pivot axis 15, a shot 13 lies coaxially below the drive head 7. This drive head 7 must now be connected to the corresponding shot 13 in a functionally reliable manner. For this purpose, the respective magazine 13 can have a locking device 20 according to FIG. 4, which is able to hold the shot 13 of the drill pipe in the working position against rotation, so that the drive head 7 with this shot 13 e.g. is connected by screwing. Here, the weft 13 can have a thread 43 in the upper region, which is screwed to the drive head 7. 4, 6 and 7, the locking device 20 consists of two elements 21 and 22, each having a slide slope 24 and 25, which cooperate with each other.

The first element 21 is provided below a guide 27 with a key-shaped locking device 23, the front one Area is able to engage in a corresponding key surface 42 on the outer circumference of the weft 13. Below this key-shaped locking device 23, the first element 21 of the locking device 20 is designed such that it can slide past the outer circumference of the shot 13 on both sides.

The second element 22 is fastened to a carriage 44, which is arranged in the central area Z of the respective magazine 12 or 16 on its central axis 14 or 18 so as to be vertically displaceable. This carriage 44 is connected to a piston-cylinder unit 26, which is supported in the central area Z of the respective magazine.

Fig. 6 shows the locking device 20 in the retracted position. 7, the piston-cylinder unit 26 is actuated, the carriage 44 moves upwards on the axis 14, whereby the first element 21 is displaced to the right in the direction of the arrow via the second element 22 and the sliding surface 24, and that is, until the front of the key-shaped locking device 23 engages in the key surface 42 and thus holds the shot 13 in the working position against rotation. The guide 27, which is firmly connected to the central area Z, serves as a counter surface during the displacement process of the first element 21.

Now the drive head 7 can be shut down from above and connected to the weft 13 in a rotationally secure manner via the thread 43. After this connection, the piston-cylinder unit 26 is again acted upon, so that the locking device 20 moves back from the position shown in FIG. 7 to the position shown in FIG. 6. The shot 13 is moved via the drive 6 or the drive head 7 down into the area of the magazine 16 in which the shots 17 of the piping are arranged. These magazines also have a locking device 20, as in the aforementioned embodiment, whereby in the same way the shot 17 of the piping in the working position is connected to the drive head 8 in a rotationally secure manner.

After the connection of the weft 13 with the associated weft projecting from the earth and the analog connection of the weft 17 with the part of the drill rod projecting from the earth, the drive heads 7 and 8 are released from the respective wefts 13 and 17 via the device 11 and sweep back to their starting position.

After completion of the borehole, the corresponding shots are moved back into the area of the magazines assigned to them after they have been loosened beforehand by the device 11 or by means of a screw connection. For the final release of the connection between the respective drive heads 7 and 8 and the shots 13 and 17 assigned to them, the corresponding locking device 20 again comes into operation and holds the respective shots 13 and 17 in the working position in the respective magazine area until the connection between these shots and the drive heads 7 and 8 assigned to them are broken again. The shots are thus moved back from the working position into the storage position within the magazine 12 or 16 assigned to them.

In order to properly hold and guide the shots 13 and 17 arranged in the respective magazines 12 and 16, according to FIG. 4, the respective central axis 14 can be provided with a roller guide 28. 5, this roller guide 28 has two coaxially arranged rollers 30 and 29, which surround a guide slot 31 on both sides. The respective shot 13 or 17 can thus be guided well between the rollers 29 and 30 assigned to them within the guide slot 31, so that there is an improvement in the mounting.

8 there is the possibility that the tracked vehicle 2 is provided in the area of the carriage 4 with articulated arms 33 and 34 with a lifting and lowering working platform 32. These articulated arms 33 and 34 are part of a four-bar linkage with a coupling 39 and a bearing 45, which is arranged on the tracked vehicle 2 next to the articulated arms 3.

This is a double rocker arm with the two articulated arms 33 and 34, and the coupling 39, a total of four joints 35, 36, 37 and 38 being provided. The work platform 42 is attached to the rocker 39.

Between the two articulated arms 33 and 34 there is a piston-cylinder unit 41, one arm of which is arranged on the housing, while the other arm is connected to the articulated arm 33. If this piston-cylinder unit 41 is actuated, the two articulated arms 33 and 34 pivot upward, so that the work platform 32 moves in the direction of the arrow via the coupling 39.

Via a piston-cylinder unit 40 which is arranged on the articulated arm 33, the coupling 39 is always held in a position which ensures that the working platform 32 is always in a horizontal plane. For this purpose, the two articulated arms 33 and 34 are designed telescopically. By means of this work platform 32, the work sequence of the drilling device according to the invention can be checked in a simple manner and controlled in a functionally reliable manner.

Claims (18)

Process for drilling holes in the ground or rock, in particular for the production of grouting anchors,

in which the hole is drilled through a drill rod with a drill bit composed of shots and driven by a rotary and / or impact drive of a drilling device,

and the borehole wall is supported by a casing pipe composed of shots and driven by a rotary and / or impact drive of the drilling device,

wherein the shots of the drill pipe and casing pipe are removed from a magazine by machine and transferred back into the hole after the hole has been drilled,

characterized,

that each shot (13) for the drill pipe from the drive (6, 7) of the drill (1) for the drill pipe, and each shot (17) for the casing pipe from the drive (6, 8) of the drill (1) for the casing pipe the magazine (12, 16) is taken over in succession and

that each shot for the drill pipe and each shot for the casing pipe are successively transferred to the magazine. Method according to claim 1,
characterized,
that each shot (13) for the drill pipe from a magazine (12) and each shot (17) for the casing pipe from another magazine (16) are removed and returned to this. Drilling device for carrying out the method according to claims 1 and 2,

with a carriage,

a lifting and lowering rotary and / or percussion drive attached to the carriage for a drill rod composed of shots with a drill bit,

a lifting and lowering rotary and / or percussion drive attached to the carriage for borehole piping composed of shots,

characterized,

that at least one magazine (12) for several shots (13) of the drill pipe is provided, which can be converted from an external supply position into a working position in which a shot is aligned with (17) the associated drive and

that at least one magazine (16) for several shots (17) of the borehole piping is available, which can be converted from an external supply position into a working position in which a shot is aligned with the drive for the piping of the borehole. Device according to claim 3,
characterized,
that the magazines (12, 16) for the drill pipe sections (13) and the borehole pipe sections (17) on the drilling device are arranged on both sides of the mount (4). Drilling device according to claim 3 or 4,
characterized,
that the magazines (12, 16) for the drill pipe sections (13) and the borehole pipe sections (17) are arranged one above the other. Drilling device according to claims 3 to 5,
characterized,
that each magazine (12) for the drill pipe sections (13) is arranged above each magazine (16) for the borehole pipe sections (17). Drilling device according to claims 3 to 6,
characterized,
that each magazine (12, 16) is designed like a turret and can be pivoted about a pivot axis (15, 19) parallel to the longitudinal axis of the mount (4) and rotatable about a central axis (14, 18). Drilling device according to one of the preceding claims,
characterized,
that at least one locking device (20) for holding a shot (13, 17) is arranged in the magazine area (12, 16). Drilling device according to claim 8,
characterized,
that the locking device (20) can be actuated mechanically, hydraulically or pneumatically. Drilling device according to claim 8 and 9,
characterized,
that each magazine (12, 16) has a locking device (20) which can be pivoted from the storage position into the working position and vice versa. Drilling device according to one of the preceding claims 8 to 10,
characterized,
that a locking device (20) in each case consists of two elements (21, 22) with interacting sliding curves (24, 25), the first element (21) provided with a key-shaped locking element (23) being acted upon vertically by the second element (22) is horizontally movable. Drilling device according to claim 11,
characterized,
that both elements (21, 22) each have a sliding slope (24, 25) as sliding curves. Drilling device according to claim 12,
characterized,
that the second element (22) is mounted in the central region (Z) of the respective magazine (12, 16) and can be moved vertically via a piston-cylinder unit (26) and a slide (44). Drill pipe according to claim 11 to 13,
characterized,
that at least one guide (27) is arranged above the key-shaped locking device (23) of the first element (21) in the central region (7) of the respective magazine (12, 16). Drilling device according to one of the preceding claims,
characterized,
that the central area (Z) of each magazine (12, 16) each has at least one roller guide (28) for the shots (13, 17). Drilling device according to claim 15,
characterized,
that each shot (13, 17) lies between two coaxially arranged rollers (29, 30) within a guide slot (31). Drilling device according to one of the preceding claims,
characterized,
that the tracked vehicle (2) is provided in the area of the carriage (4) via articulated arms (33, 34) with a lifting and lowering working platform (32). Drilling device according to claim 17,
characterized,
that the telescopic articulated arms (33, 34) are part of a four-bar linkage.

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