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KERENZERBERGTUNNEL LOS 1 SiSto

The purpose of this contract is the construction of a 5.5-km-long rock safety tunnel (1) to be excavated along an initial 150 mm section by blasting (crossing through karst area) and then by TBM (ømin=7.10 m; ømax=8.00 m). The tunnel will have 18 transverse passageways (3) for connection to the motorway tunnel (1 passageway every 300 m), two underground power plants (4+5) for the safety tunnel and power plants at the portals (2+7), and 52 ventilation shafts (1 every 100 m).
A prefabricated gantry cable conduit of approximately 4x2.5 m is to be placed inside the section.