October 15, 2010 and
March 23, 2011 MAIN BREAKTHROUGH
m above NORTH
sea level
Aar Massif
Tavetsch
Intermediate Massif
EASTERN Tunnel
WESTERN Tunnel
SOUTH
Penninic Gneiss Zone
Gotthard Massif
Piora Basin
3.000
Gypsiferous cap-rock
Intschi zone
2.000
SEDRUN
AMSTEG
FAIDO
ERSTFELD
BODIO
1.000
2008
500
Tunnel length: 7,148m (1) 2009
2003
Tunnel length: 7,116m (2)
Tunnel length: 10,722m (3)
2006
2007
Drill & blast tunnelling
Tunnel length: 10,703m (4)
ERSTFELD / AMSTEG
AMSTEG / SEDRUN
(2) Gabi II, Herrenknecht Gripper TBM S-422,
9.58m
9.58m
April and May 2008: Start of regular tunnelling.
July 19, 2009: 56m of new tunnel are created in just 24 hours. This
is deemed to be a world record for a hard rock TBM of such dimensions.
June 16, 2009 and September 16, 2009: The machines reach their
targets after just 18 months – 6 months ahead of schedule. Deviation
from the ideal axis measures only 4mm in the horizontal and 8mm in
the vertical.
Top tunnelling performances: 56m/day, 185m/week, 711m/month.
Tunnel length: 11,134m (5)
Tunnel length: 11,088m (6)
2007
2006
Tunnel length: 13,426m (7)
Tunnel length: 14,088m (8)
FAIDO / SEDRUN
Arge AGN (Gotthard Base Tunnel North Consortium):
STRABAG AG Tunnelbau Schweiz (CH) / STRABAG AG (A).
(1) Gabi I, Herrenknecht Gripper TBM S-421,
2010
2011
BODIO / FAIDO
BODIO / FAIDO
Arge TAT (Tunnel AlpTransit – Ticino): Implenia Industrial Construction, Alpine Bau GmbH,
CSC Impresa Costruzioni SA, Hochtief AG, Impregilo SpA.
(3) Gabi I, Herrenknecht Gripper TBM S-229,
9.58m
(5) Sissi, Herrenknecht Gripper TBM S-210,
9.43m
(7) Sissi, Herrenknecht Gripper TBM S-210,
8.83m
(4) Gabi II, Herrenknecht Gripper TBM S-230,
9.58m
(6) Heidi, Herrenknecht Gripper TBM S-211,
9.43m
(8) Heidi, Herrenknecht Gripper TBM S-211,
8.83m
October 2003 and January 2004: Start of regular tunnelling.
2004: The TBMs pass the Intschi fault zone more quickly than planned.
June 2005: A mixture of water and fine material entered the cutterhead
in the western tube. The TBM must be freed and cannot restart tunnelling
until November.
June and October 2006: The construction site teams successfully complete
tunnelling at the end of the lots, 9 and/or 6 months ahead of the schedule.
Top tunnelling performances: 40m/day, 210m/week, 688m/month.
July and October 2007: The TBMs begin tunnelling the second
construction phase in the south with new, larger cutterheads ( 9.43m).
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.
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.
2003