Switzerland
Gotthard Base Tunnel: Drive concluded
On March 23, 2011 at 20 past 12 noon the tunnel boring machine broke through from the Faido western bore into the Sedrun part-section (title page); in this connection the deviations from the intended value amounted to only 3 mm horizontally and 0 mm vertically. Roughly 5 months after the main breakthrough in the eastern bore the 2 single-track tubes of the Gotthard Base Tunnel were thus completed over a length of 57 km. With this second main breakthrough a construction phase was concluded, which began in the Bodio southern part-section in 2001 and was prepared for back in 1996 with the...
