“alwag” Tunnelausbau Gesellschaft M.b.h.

Dywidag-systems International Gmbh

Dsi Underground Austria Gmbh

Karl Böhm

Josef Mocivnik

Renè Egger-Mocivnik

Alfred Wagner

Walter Karpellus

Wolfgang Dolsak

Dieter Glantschnegg

A method and device for boring, particularly percussion boring or rotary percussion boring, a hole in soil or rock material and for forming an anchoring. A borehole is formed by inserting a drill bit, and a casing tube is placed inside the borehole during the boring process. Once the borehole is completed, the boring rods are detached from the drill bit and removed from the borehole. The periphery of the casing tube is provided with a number of passage openings for discharging hardenable material. A tensioning device for the anchor, particularly an anchor plate and a screw that can be screwed onto the casing tube, can be fixed to the end of the casing tube protruding from the borehole. Anchoring or fixing elements for anchoring the casing tube on the surrounding inner wall of the borehole are provided, in particular, on the end area of the casing tube oriented toward the drill bit.

Method and device for producing pretensioned anchorings

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Holzhausen, Austria

Karl Böhm