Page 5 - TunnelTalk Annual Review 2010 Preview

AT THE GOTTHARD.
AT THE NEW GOTTHARD BASE TUNNEL.
Herrenknecht Aktiengesellschaft The Board of Management
Dr.-Ing. E. h. Martin Herrenknecht Dipl.-Ing. (FH) Gebhard Lehmann Betriebswirt (VWA) Kurt Stiefel
Chairman of the Board of Management Vice Chairman of the Board of Management Member of the Board of Management
www.herrenknecht.com
Main breakthrough
October 15, 2010 October 15, 2010
Breakthrough eastern tunnel March 23, 2011
Eastern tunnel Western tunnel
SOUTH
Gotthard Massif
Penninic Gneiss Zone
Piora Basin
Gypsiferous cap-rock
FAIDO
BODIO
2010 Tunnel length: 11,019384m (5) 2007 2006 Tunnel length: 13,426m (7) 2003
2011 Tunnel length: 11,10188m (6) Tunnel length: 14,088m (8)
FAIDO / SEDRUN BODIO / FAIDO
BODIO / FAIDO
TAT Consortium: Implenia Industrial Construction, Alpine Bau GmbH, CSC Impresa Costruzioni SA, Hochtief AG, Impregilo SpA
(5) Sissi, Herrenknecht Gripper TBM S-210, 9.43m (6) Heidi, Herrenknecht Gripper TBM S-211, 9.43m
(7) Sissi, Herrenknecht Gripper TBM S-210, 8.83m (8) Heidi, Herrenknecht Gripper TBM S-211, 8.83m
January and February 2003: Start of regular tunnelling.
2003: After just 200 meters the tunnellers unexpectedly encountered unstable kakirites. This slows down tunnelling for 6 months, since every meter of tunnel must be secured in a complex process.
2004 to 2006: Stable rock alternates with brittle, squeezing rock. September 6 and October 26, 2006: Successful breakthroughs
at the Faido underground multifunctional station.
Top tunnelling performances: 38m/day, 190m/week, 619m/month.
July and October 2007: The TBMs begin tunnelling the second construction phase in the south with new, larger cutterheads ( October 2008 and February 2009: The 150 meter long Piora Basin is crossed successfully.
March 2010: A rock fall in the western tube and the subsequent
stabilization measures interrupt tunnelling here until July.
October 15, 2010 and March 23, 2011: Final breakthrough. World record. Top tunnelling performances: 36m/day, 179m/week, 705m/month.
9.43m).
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