Service Performed Detailed design, instrumentation and construction supervision
Technical data
Two lane road tunnel, 520 m length, construction techniques incl.: NATM, Doorframe Slab Method, Cut & Cover, Barrel Vault Method under existing railway embankment.
Geology description
Bunter Sandstone (sandstone, clystone), sand, clay and 120 year old railway embankment (rock fill, sand, clay, gravel).
Geology Types: Mixed Face
Description
The German Federal Railway Authority imposed high demands on safety since it did not allow for any disruption to railway traffic.
Barrel Vault Method, Doorframe Slab Method