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Bauer Spezialtiefbau Gmbh

Gunter Henn

Thomas Bauer

Erwin E Stotzer

Manfred Stocker

Konrad Friedrich

A method and an apparatus for producing a support element in the ground are described, a hole being sunk through non-stable ground at least down to the load bearing soil. As a result of a wedge-shaped construction of the drill bit the loosened soil is displaced into the adjacent region of the hole and consequently the area round the hole is compacted. The drill has a circular cylindrical core, which is provided with an outlet opening in the vicinity of the drill bit. Preferably tampable material is filled through the core tube, accompanied by the retraction of the drill. The material is simultaneously tamped with the aid of the drill. The invention has the particular advantage that, in cost effective manner, it is possible to use tampable material from the area immediately surrounding the building site and there is no need for expensive, classified filling material. Tubing of the hole is unnecessary through the use of the core tube.

Method and apparatus for producing a support element in the ground

A detachable pipe joint of the type having conical male and female parts has a recess in one of the parts covered by an expansible hard material, the recess being connected with a hole to which a high pressure fluid can be applied so as to expand the hard covering and provide a firm joint.

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Schrobenhausen, Germany

Gunter Henn