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B 27 Bypass Tunnel Oberrieden
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| Service: | Detailed design, instrumentation and construction supervision
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| Estimated cost: | Commencement: | December 28, 1990
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Completion date: | December 28, 1992
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| Location: | Bad Sooden-Allendorf 37242 Oberrieden, Hesse Germany |
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| 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. |
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| Geology description: | Bunter Sandstone (sandstone, clystone), sand, clay and 120 year old railway embankment (rock fill, sand, clay, gravel). Geology Types: Mixed Face |
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| Bid cost: | Final cost: | $12,500,000
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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
