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German company enlarges the tunnels while keeping it operational for trains

 

The 150-year old Kuckuckslay-Tunnel in Germany (between Trier-Ehrang and Kordel) is being enlarged. What is special? It allows tunnel be used continuously during the enlargement process. Deutsche Bahn gets the tunnel diameter enlarged by 1.20 meters and track spacing from 3.50 meters to 4 meters.

Deutsche Bahn has already plans to apply the same technology to some of the more than 700 tunnels that exist in Germany.

https://www.rtl.de/cms/immer-mehr-bahn-tunnel-werden-mit-neuer-methode-modernisiert-4552255.html

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