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Adits for Long and Deep Tunnels

In 2010, the ITA-working group N°17 published a revised version of the report entitled long Tunnels at great depth.

The original 2003 report was revised to take into account the experiences of long traffic tunnels at great depths in the Alps. The lötschberg base tunnel (Switzerland) was commissioned in 2006, and the gotthard base tunnel was broken through in 2011. Investigation work is under way for the lyon-Turin (France – Italy) and Brenner base tunnel projects.

This revision has also incorporated experiences from projects in China, Japan, Norway and Sweden, where projects are currently underway.

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