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Abstract: In the course of the extension of the new railway line Wendlingen-Ulm, the Boßler Tunnel is to be excavated in planning approval section 2.2 "Albaufstieg", as a two-tube, single-jacket tunnel with a length of 8.806 m between Aichelberg and Mühlhausen. The contract for the construction of the new high-speed road was awarded to the working group "Tunnel Albaufstieg" by the Deutsche Bahn...