Wolfburg Pedestrian Tunnels
TOTAL IMMERSED LENGTH: 58.0 m per tunnel
DEPTH AT BOTTOM OF STRUCTURE: 10 m below mean water level
HEIGHT: 5.30 m
WIDTH: 11.0 m (12.52 m at the ventilation shafts)
ENVIROFABRICATION METHOD: Cast in approach excavationNMENTAL CONDITIONS: Virtually no current
DEPTH AT BOTTOM OF STRUCTURE: 10 m below mean water level
HEIGHT: 5.30 m
WIDTH: 11.0 m (12.52 m at the ventilation shafts)
ENVIROFABRICATION METHOD: Cast in approach excavationNMENTAL CONDITIONS: Virtually no current
Wolfburg,
Germany
(two tunnels under Mittelland Canal, opposite the VW plant)
Volkswagen AG, Wolfsburg
Philipp Holzmann AG, Frankfurt
Philipp Holzmann AG, Frankfurt
58m
58.0 m per tunnel
10 m below mean water level
Project construction
1966-04-30
1 for each tunnel
One tube
5.30m
11.0 m (12.52 m at the ventilation shafts)
Because of the narrow shipping canal and the high groundwater level in the adjacent
excavations, the ends of the floating elements had to be provided with an upward bend
to allow for connections to the landside tunnels.
excavations, the ends of the floating elements had to be provided with an upward bend
to allow for connections to the landside tunnels.
Cast in approach excavation
In casting basin during
fabrication
fabrication
Virtually no current
Floating and lowering using block and tackle from transverse steel girders supported on
the outboard ends of the support of excavation for the approach tunnels
the outboard ends of the support of excavation for the approach tunnels
Construction in the dry.
Joint made watertight with
bitumen seal coat
Joint made watertight with
bitumen seal coat
All around, multiple-layer bitumen seal protected by pearl gravel. Roof slab membrane
protected with reinforced concrete slab.
protected with reinforced concrete slab.
Bottom screeded by a plow (girder) attached to steel girders, which ran on slide rails set
to grade
to grade
Sandfill
Reinforced