Jacket tube for a drilling and anchoring device

Abstract

The invention relates to a jacket tube (6) for a device for drilling holes and forming an anchorage in the earth or rock. The inventive jacket tube (6) is coupled with a drill pipe (3) and/or a drill bit (1) or a drill hammer and is configured with a plurality of through openings across its periphery. Once the borehole (2) has been made, or after an anchor has been introduced, the jacket tube can be filled with a hardenable suspension. According to the invention, the jacket tube consists of at least one expanded metal element (6) which has evenly distributed through openings (9) and connecting elements (7, 8), especially sleeves, at the ends for connecting to a drill bit (1) and/or other jacket tube elements (6). The borehole (2) is therefore easy to produce and the jacket tube (6) can be anchored securely.

Description

[0001] The present invention is a continuation application of PCT / AT99 / 00237, filed Oct. 4, 1999.[0002] The present invention relates to a jacket tube for a device for drilling holes and forming an anchorage in soil or rock material, wherein the jacket tube is coupled with a drill rod assembly and / or a drill bit or a drilling hammer, respectively, and is formed with a plurality of passage openings about its circumference and capable of being filled with a curable suspension after completion of the drill hole or after insertion of a roof bolt.DESCRIPTION OF THE PRIOR ART[0003] Devices for drilling and, in particular, impact drilling or rotary percussion drilling and subsequently lining holes in soil or rock material are known in various configurations. Thereby, a hole or a bore optionally extending over a great length is formed by the aid of a drill bit mounted on a drill rod assembly, the drill hole being formed by a percussive and / or rotary movement. In order to prevent material fr...

AI Technical Summary

Problems solved by technology

In this context, the known embodiments of jacket tubes such as, for instance, of WO 98/21439 involve the drawback that they have substantially smooth surfaces, being usually made of steel or synthetic elements, such that even upon introduction of a suspension through a plurality of passage openings provided in the jacket tube a partially only local penetration of the curable suspension into the surrounding material is rendered feasible and a substantially smooth or plane interface will be obtained between the suspension and the external surfaces of the jacket tube, thus partially strongly impairing the anchoring ef

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