Germany

Upgrading Project VDE 8.1: Burgberg Tunnel receives 2nd Bore

Construction works at the north portal of the Burgberg Tunnel Quelle/credit: DB AG/Kniestedt
Construction works at the north portal of the Burgberg Tunnel
Quelle/credit: DB AG/Kniestedt

As part of the rail upgrading project VDE 8.1, a second two-track bore is required next to the existing Burgberg Tunnel on the 16 km section near Erlangen (completion by 2018, cost about 108 million euros) to complete the four-track upgrading of the line from Nuremberg to Ebensfeld. The existing tunnel was the first rail tunnel built in Bavaria in 1844. The new 306 m long tunnel under the Burgberg is being mined in sandstone and claystone with continuously fluctuating strength and deformability, with only short sections 6 m long being built by cut-and-cover at each portal. The new tunnel, with...

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