Tokyo Port Tunnel
HEIGHT: 8.80 m
WIDTH: 37.4 m
TOTAL IMMERSED LENGTH: 1,035 m
DEPTH AT BOTTOM OF STRUCTURE: 23 m
ENVIRONMENTAL CONDITIONS: Site is located in busy fairway.
FABRICATION METHOD: Casting basin close to tunnel site for all nine elements.
WIDTH: 37.4 m
TOTAL IMMERSED LENGTH: 1,035 m
DEPTH AT BOTTOM OF STRUCTURE: 23 m
ENVIRONMENTAL CONDITIONS: Site is located in busy fairway.
FABRICATION METHOD: Casting basin close to tunnel site for all nine elements.
Wangan-Sen; Tokyo,
Japan
The Tokyo Expressway Public Corp. (TE PC)
Joint venture of: Taisei Corporation, Kajima Corporation, Ohbayashi-Gumi and Maeda Construction Co
115.8m
1,035m
23m
Project construction
1976-04-30
9
Two tubes; three lanes each
8.80m
37.4m
1. Flexible seismic joints were provided.
2. Steel pipe pile foundation was adopted for elements near northern ventilation shaft to
limit force due to consolidation.
3. New foundation method was developed whereby bentonite mortar was pumped from
inside the elements. Very wide, heavy elements.
2. Steel pipe pile foundation was adopted for elements near northern ventilation shaft to
limit force due to consolidation.
3. New foundation method was developed whereby bentonite mortar was pumped from
inside the elements. Very wide, heavy elements.
Casting basin close to tunnel site for all nine elements.
Site is located in busy fairway.
Placed from catamaran barges.
Flexible joint using Gina gasket type joint. A steel
Omega-shaped plate was used as a second seal.
Omega-shaped plate was used as a second seal.
6 mm steel skin on sides and bottom. Concrete protected rubber membrane on top of
element.
element.
A bentonite mortar layer 0.5 m thick was pumped under the elements over a 0.7 m thick
crushed sandstone layer. Edges of elements were sealed with sand/gravel filter to
prevent mortar from escaping. Steel pile foundation was used for three elements.
crushed sandstone layer. Edges of elements were sealed with sand/gravel filter to
prevent mortar from escaping. Steel pile foundation was used for three elements.
1.5 m sandstone riprap for protective cover. Sandstone rock spoil used for locking fill.
Reinforced
1.10