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Frejus safety tunnel TBM away

20/08/2011
Frejus safety tunnel TBM awayOn 04.07.2011, the 9.46 m-diameter, 170 m-long Herrenknecht TBM commenced excavation and lining of the French section of Frejus safety tunnel. The machine was assembled in a 17 m-high, 17 m-wide and 42 m-long chamber, accessed by a 600 m mined tunnel. Planned advance is 15 m/day. Click fr/47 and it/166. Visit www.razel.fr. 33/11.



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