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Subway Lot 31 - Frankfurt/Main
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| Service: | Value Engineering / Alternative Design
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| Estimated cost: | Commencement: | July 01, 1980
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Completion date: | June 01, 1984
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| Location: | Frankfurt/Main , Hesse Germany |
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| Technical data: | Three single track tunnels, L = 350 m each. |
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| Geology description: | Frankfurt Clay (silt and sand), waterbearing. |
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Description
Immediate backfill with excavated material at the face. Shotcrete stabilisation at the sink hole (15 cm). Filling of sinkhole with excavated material. Drift trough sink hole with rebar spiling as additional support.