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Tunnelling and its importance


A selection of our best projects

Semmering Base Tunnel SBT Lot 2.1

The planned Semmering Base Tunnel (SBT) is currently one of the most important large-scale infrastructure projects in the heart of Europe and part of the new Austrian Southern Railway, which is the central axis on the trans-European route from the Baltic Sea to the Adriatic Sea.

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The new Wendlingen-Ulm line (NBS), together with Stuttgart 21, significantly improves Baden-Württemberg's infrastructure and thus creates shorter travel and transport times not only in Baden-Württemberg but also across Germany and Europe.

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SMS 2A - Double-track railway Sandbukta-Moss-Såstad

The Sandbukta-Moss-Såstad (SMS) line is part of the Bane NOR InterCity programme to develop connections between the country's main cities and relieve congestion in the capital Oslo.
In the execution phase, we are in charge of the structural design of the concrete structures (troughs and concrete tunnels in open construction) for the Kransen and Carlberg areas. We succeeded in further optimising the construction: For example, we were able to demonstrate a structure base without the prestressing originally envisaged in the client's design. This resulted in significant cost savings. We are also working with BIM on this project.

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Lyon Metro Line B

This project, with a length of approximately 2.5 km, will extend line B from Gare d'Oullins station to Hôpitaux Lyon Sud station and create two additional stations. The journey time between Oullins station and the Lyon Sud hospitals is 3 minutes and 20 seconds.

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Nant de Drance pumped storage power station

The project involves the construction of a pumped storage power plant between the two dams Emosson and Vieux Emosson. The new power plant cavern is located at approx. 1700 m a.s.l. Access to the underground facility is from below through a 5 km long tunnel and from above through a 2 km long tunnel system.

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Slussen SN91

Extensive rock and concrete work at Katarina Mountain. To accommodate Stockholm's continuous development, Slussen is rebuilt and a bus terminal is built at Katarinaberget.

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Here is a selection of our tunnelling news