Switzerland
Ceneri Base Tunnel: North Drive in Vigana
At the end of December 2011, as foreseen 670 m of the 15.4 km long Ceneri Base Tunnel had been excavated by drill+blast for the north drive started in June 2009 at Vigana (Camorino). At the beginning of 2012 work began on the inner lining of this tunnel section. The tricky undercutting of the A2 motorway is numbered among the preliminary operations undertaken in this sphere.
As from 2012 only the drives from the Sigirino intermediate point of attack are to be tackled. At the beginning of 2012, 16.8 km (42.4 %) of the roughly 40 km of tunnels had been excavated. The inner lining is being...
