Germany

Pforzheimer Tunnel: Breakthrough in May 2017, Opening in September 2018

Print und online Quelle/credit: Deutsche Bahn AG
The new Pforzheimer Tunnel has been built using the shotcrete method, with about 600 m passing through rock and about 300 m through soil
Quelle/credit: Deutsche Bahn AG
NUR für online Quelle/credit: Deutsche Bahn AG
The tunnel was broken through on 3 may 2017 at the Pforzheim portal
Quelle/credit: Deutsche Bahn AG
NUR für online Quelle/credit: Deutsche Bahn AG
The tunnel excavation was divided into top heading and bench
Quelle/credit: Deutsche Bahn AG

Structural works in the new 909 m long Pforzheimer Tunnel on the railway line from Karlsruhe to Mühlacker have been completed. The original Pforzheimer Tunnel, built between 1858 and 1860, was no longer suitable for current requirements for rail operation, including the fact that its two tracks only had a spacing of 3.64 m, so a new twin-track tunnel has been built parallel to the existing tunnel. The main construction works started in August 2015 and the tunnel was broken through at the start of 2017, about three months later than it was still scheduled in autumn 2016.

The causes for this were...

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