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Abstract: The Brenner Base Tunnel incorporates the latest security standards in tunnelling. Besides the cross-connecting tunnels that link the two main tunnel tubes every 333 m and serve as an escape route, underground emergency stops connecting to the surface are located approximately every 20 km. This configuration conforms to a high security standard for tunnels. The emergency stops include a central...
Abstract: During the hard rock TBM drive of the exploratory tunnel in construction lot Tulfes-Pfons H33, difficult rock mass conditions were encountered. In particular in the area of chainage 9.670 fractured rock mass and fault bands led to collapse after boring and overbreaks. The cavity caused by this collapse, named "Iris" was temporarily stabilized, so the TBM could end the drive successfully....