Underground construction methods: Case Studies
Case Studies & Reports
Koralm Tunnel (KAT3) stabilized by pipe umbrella system with innovative squeezed connection
The Koralm Tunnel in Austria is the core part of the Baltic-Adriatic Corridor, a planned railway link between the cities of Gdansk in Poland and Ra ... more
"Bärlinde" tunnel boring machine reaches Brandenburg Gate station
Implenia has been working since 2011 on the new U5 underground railway line for the Berlin Transport Authority (BVG). The project includes extendin ... more
A giant dives deep and brings Europe and Asia together at the Bosphorus
On August 22, 2015, a high-level audience experienced the ultimate breakthrough of one of the boldest tunnel missions ever. In the afternoon, befor ... more
High-Performing, Cost-Efficient Solutions for Underwater Tunnel Construction
To relieve the chronic congestion in and around the existing two-lane Midtown Tunnel in downtown Norfolk, Va., rehabilitation of the tunnel is plan ... more