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In September 2023, the SBB started the fundamental overhaul of the Hauenstein Base Tunnel. The tunnel vault and technical installations of the railway tunnel will be renovated. This work will last...

Deutsche Bahn has successfully driven all tunnels of the Stuttgart 21 project. In total, the tunnellers have dug around 56 kilometres of tunnel. With the last tunnel breakthrough on 14 September 2023...

After 5 decades „perhaps more dynamic and charming than in its youth“ – this is how Davide Fabbri described the „jubilarian“, the Swiss Tunnelling Society, during his welcoming speech at the 21st...

The SBB contract for lot 2 “Tunnel Ligerz” was assigned to joint venture IBD, consisting of the partners Implenia (lead), Bernasconi and De Luca. The total contract volume is 230 million euros. The...

In June 2023, a 8.0 m diameter Robbins Single Shield TBM completed its second tunnel at Turkey’s Bahçe-­Nurdagˇi Railway. The machine completed 9.6 km of tunneling, adding on to the 9.2 km it...

Modern sprayed concrete technology and the use of steel fibers have made permanent, single-shell linings for tunnel construction possible. Until now, mainly temporary layers of sprayed concrete were used for stability, followed by a permanent concrete lining. But now such an inner lining can also be produced with high-quality, steel fiber-reinforced sprayed concrete.

For five decades, the German Tunnelling Committee DAUB has been promoting underground construction in all its aspects. Themed  “50 years of DAUB – a hidden champion invites you”, the association had...

Schöller Special Machines (SSM) is one of the world‘s leading manufacturers of tunnel excavators and special machines that can be modified for specific applications according to customer requirements....

On 28 July 2023, the German state-owned project management institution DEGES (Deutsche Einheit Fernstraßenplanungs- und -bau GmbH) awarded the contract for the construction of the 1.7 kmWeser Tunnel...