Second Tunnel Section for the Düsseldorf Wehrhahn Line driven

The Wehrhahn Line, a 300 million euro Metro project, is intended to relieve traffic in downtown Düsseldorf once it opens in 2015, for it will replace several tram routes operating on the surface. For this purpose 2.3 km long tunnel bores, each with 8.30 m diameter are being driven by mechanised means for what will later be 2 directional tracks. They are being excavated one after the other in 2 individual drives (1,298/955 m) with the same tunnel boring machine (TBM), a mix-shield with 9.50 m diameter (S-491 Herrenknecht), 65 m long and weighing 1,300 t. The tunnel is being lined with...

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