British Tunnelling Society

摘要

The BTS has a membership of almost 700 individual and 60 corporate members. It is one of the most vibrant gatherings of professional tunnellers in the world and traces its history back to its founding in 1971. Events are hosted at the Institution of Civil Engineers in London. Lot NL 35 of the Norra Lanken project in Stockholm comprises the construction of approximately 2.6km of tunnels in hard rock. The primary function of the inner lining is to protect the traffic against ice, dripping water and fire. Additionally it provides the facing of the tunnels traffic space.