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Underground driving methods
Case Studies & Reports 
Formwork Carriage Follows the World's Largest Tunnel Boring Machine
The 1950s vintage Alaskan Way Viaduct has long been considered one of the most important thoroughfares along Seattle's waterfront. As a replacement ... more
Alto Maipo, Chile's largest hydroelectric power plant project
The construction of the Alto Maipo Hydroelectric Power Plant is currently being carried out in the foothills of the Chilean Andes in the Maipo vall ... more
Tunnel excavation for the Cheves hydroelectric power plant in Peru
In 2010, construction work began at the Cheves hydroelectric power plant that is located on the Huaura River about 130 km north of Lima. Since its ... more
Pummersdorf Tunnel: Closing a gap in one of Austria’s most important railway lines
Within the scope of the Westbahn extension, one of the most important railway lines in Austria, a 24.7 km long gap was closed between the towns of ... more
The Albaufstieg: Tunnel construction for high speed rail line
The Stuttgart-Ulm railway project includes several major projects that will shift traffic from the roads to the rails. The existing, winding rail l ... more
Construction of Goetschka and Freistadt Tunnels
In 2009, construction began on the S10 Muehlviertel Highway in Upper Austria. The new S10 highway connects to the existing Muehlkreis A7 Motorway n ... more
Brenner Base Tunnel – Advancement in highly converging rock mass
At 1,371 m above sea level, the Brenner Pass is the most important connection between Central Europe and Italy, carrying more than a third of all t ... more
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