TBM breakthrough on second tube of Bossler rail tunnel

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Photo: Herrenknecht.
Photo: Herrenknecht.

Tunnel boring machine (TBM) manufacturer Herrenknecht has reported that its TBM ‘Käthchen’ has completed the second tube of the Bossler rail tunnel in Germany.

The 8.8km twin tunnel is part of the Stuttgart-Ulm high-speed railway project that is expected to go into operation in 2022, halving travel time on the route.

Construction of the two tubes, which are connected at 500m intervals, began in 2013.


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The work was undertaken by the ARGE ATA Tunnel Albaufstieg consortium for client Deutsche Bahn.

The consortium is made up of: Porr Deutschland, G. Hinteregger & Söhne Baugesellschaf, Östu-Stettin Hoch-und Tiefbau and Swietelsky.


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