Removal system for underground tunnels or stretching, extraction unit as well as segment.

摘要

The present invention relates to a removal system for underground tunnels or distances as well as an extraction unit 3 and an arc segment 4 for an extraction unit 3. the removal system comprises in the formation is strained a rock anchor 1 and in the longitudinal direction of the tunnel and / or the section with a distance from each other and removal units 3, which is connected to one another resilient sheet segments 4 are composed, as well as a concrete body 5 and integrated compression elements, 6. according to the invention, there is an arc segment 4 of a grid support section 7 with end-side sliding profile sections 10. two adjacent segments 4 are in the circumferential direction with the incorporation of a sliding connection profile coupled to one another in such a way that the extension unit 3 by pushing one into the profile of the sliding section 10 and of the sliding connection profile, it can yield.