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Subway Lot 31 - Frankfurt/Main

Owner:
Frankfurt Metropolitan Mass-Transit Authority, Germany
Client:
Boswau & Knauer, Germany
Service:
Value Engineering / Alternative Design
Estimated cost: Commencement:
July 01, 1980
 Completion date:
June 01, 1984
Location:
Frankfurt/Main , Hesse
Germany
Technical data:

Three single track tunnels, L = 350 m each.
Geology description:

Frankfurt Clay (silt and sand), waterbearing.
Categories:
Urban Rail/Bus Stations and Tunnels
Service areas:
Tunnel Design & Specialities
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.