Design and construction challenges of hard rock TBMs at the Gotthard Base Tunnel
Mining Engineering, 2012, Vol. 64, No. 9, pp. 196-201
Rehbock-Sander, Michael; Boissonnas, Yves
The Gotthard Base Tunnel (GBT) is 57 km (35 miles) long and consists of two parallel single-track tubes with an excavation diameter ranging from 8.8 to 9.5 m (28.8 to 31.2 ft). These are interlinked by cross-passages every 312 m (1,000 ft). Two multifunction stations (MFS) are located in the sections Sedrun and Faido, at one-third and two-thirds of the entire tunnel length (Fig. 1). These will be used for the diversion of trains to the other main tube via tunnel crossovers, for the housing of technical infrastructure and equipment and for potential emergency stops.