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Bossler Tunnel in Germany: »Käthchen« achieves Breakthrough

 

The site crew working with tunnel boring machine »Käthchen« (»Katie«) has completed the second tube of the Bossler tunnel. The breakthrough near Mühlhausen im Tale in Baden-Württemberg is another milestone in the construction of the Stuttgart-Wendlingen-Ulm railway line. The Bossler Tunnel is part of the Stuttgart-Ulm railway project and is expected to go into operation in 2022.
Construction of the two tubes was carried out differently than initially planned. The TBM (Ø 11,340 mm) was able to excavate almost the entire route. At up to 38 meters per day, the work progressed extremely quickly.

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