Metropolitan Railway Tunnel under the Main
HEIGHT: 8.55 m 8.55 to 10.28 m
WIDTH: 12.10-13.10 m 12.10-12.70 m
TOTAL IMMERSED LENGTH: 123.5 m
DEPTH AT BOTTOM 17 m below water level
ENVIRONMENTAL
CONDITIONS: Mild currents; flow of bottom sediments during periods of high water
FABRICATION METHOD: Casting basin in the approaches on each side. Intermediate joints provided at 13.70 m spacing to reduce temperature and shrinkage cracking.OF STRUCTURE: 17 m below water level
WIDTH: 12.10-13.10 m 12.10-12.70 m
TOTAL IMMERSED LENGTH: 123.5 m
DEPTH AT BOTTOM 17 m below water level
ENVIRONMENTAL
CONDITIONS: Mild currents; flow of bottom sediments during periods of high water
FABRICATION METHOD: Casting basin in the approaches on each side. Intermediate joints provided at 13.70 m spacing to reduce temperature and shrinkage cracking.OF STRUCTURE: 17 m below water level
Frankfurt am Main,
Germany
Deutsche Bundesbahn (German Railway)
Joint Venture: Dyckerhoff + Widmann AG, Frankfurt; Bilfinger + Berger, Frankfurt; Josef Riepl AG, Strabag AG
Deutsche Bundesbahn
1 - 61.5 m 1 - 62 m
123.5m
17m
Project construction
1983-04-30
2
Two tubes; one track each tube
8.55 m 8.55 to 10.28 m
12.10-13.10 m 12.10-12.70 m
Varying cross sections
Casting basin in the approaches on each side.
Intermediate joints provided at 13.70 m spacing to reduce
temperature and shrinkage cracking.
Intermediate joints provided at 13.70 m spacing to reduce
temperature and shrinkage cracking.
In casting basin as part of
fabrication operation
fabrication operation
Mild currents; flow of bottom sediments during periods of high water
Lowering from bridging frame over the excavation and from a pontoon bridge in the
river.
river.
Gina/Omega joints
Impermeable reinforced concrete
Sand-flow method, using openings in bottom slab.
Fill plus stone blanket.
Reinforced