CCD Grande Dixence | Switzerland
Excavation diameter
5.81-4.80-4.4 m
Tunnel length
10,600 m
Geology
Mica schists
Type of support
Prefabricated segments
Completed in
1998
Client
EOS (L’Energie de l’Ouest-Suisse)
One of the longest inclined shafts ever constructed with two shielded TBMs and innovative transport systems.
After a year of technical discussions with the best European competition, the two critical lots in this project were entrusted to SELI Overseas, as part of a joint venture with local partners.
For the excavation of the 2.5 km inclined tunnel, new technologies for transporting excavated material were developed and implemented.
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