Tama River Tunnel
HEIGHT: 10.0 m
WIDTH: 39.9 m
TOTAL IMMERSED LENGTH: 1,549.5
DEPTH AT BOTTOM OF STRUCTURE: 30 m
ENVIRONMENTAL CONDITIONS:
At the mouth of the Tama River.
FABRICATION METHOD:
Fabricated in a graving basin used jointly with the
Kawasaki Fairway Tunnels. The basin accommodated 11
elements at a time and had a floor area of 107,000 m²
(592 m x 190 m).
WIDTH: 39.9 m
TOTAL IMMERSED LENGTH: 1,549.5
DEPTH AT BOTTOM OF STRUCTURE: 30 m
ENVIRONMENTAL CONDITIONS:
At the mouth of the Tama River.
FABRICATION METHOD:
Fabricated in a graving basin used jointly with the
Kawasaki Fairway Tunnels. The basin accommodated 11
elements at a time and had a floor area of 107,000 m²
(592 m x 190 m).
Tokyo,
Japan
Metropolitan Expressway Public Corporation
Tamagawa Tunnel Joint Venture: Kajima Corporation; Kumagai Gumi Co Ltd; Ohbayashi Corporation; Shimizu Corporation; Nishimatsu Construction Co Ltd; Okumura Corporation; Fujita Corporation, Toa Corporation.
128.6m
1,549.5m
30m
Project construction
1994-04-30
12
Two tubes; three lanes each. Escape passageways and utility space for gas, electric and drainage lines in the side tubes.
10m
39.9m
Half of the tunnel was constructed on a curve. Flexible earthquake joints were provided
between all the tunnel elements. Piles were driven in casting basin bottom after it was
stabilized with soil cement. Liquid nitrogen was used to cool sand during summer
concreting. Blast furnace cement was used to reduce thermal cracking.
between all the tunnel elements. Piles were driven in casting basin bottom after it was
stabilized with soil cement. Liquid nitrogen was used to cool sand during summer
concreting. Blast furnace cement was used to reduce thermal cracking.
Fabricated in a graving basin used jointly with the
Kawasaki Fairway Tunnels. The basin accommodated 11
elements at a time and had a floor area of 107,000 m²
(592 m x 190 m).
Kawasaki Fairway Tunnels. The basin accommodated 11
elements at a time and had a floor area of 107,000 m²
(592 m x 190 m).
At the mouth of the Tama River.
Catamaran barges. 10 cm freeboard. 500 MT during lowering (1%) and 1500 MT in
place (3%) prior to placing final ballast (1.1 SF against flotation, not counting backfill).
place (3%) prior to placing final ballast (1.1 SF against flotation, not counting backfill).
Gina/Omega type joint. Flexibility is provided by the
rubber joint, in combination with the use of post-tensioned
rods tightened across the joint. Three vertical shear keys
provided in the walls and one horizontal key in the floor
provide stability against displacements due to
earthquakes and/or settlements.
rubber joint, in combination with the use of post-tensioned
rods tightened across the joint. Three vertical shear keys
provided in the walls and one horizontal key in the floor
provide stability against displacements due to
earthquakes and/or settlements.
8 mm steel plate on sides and bottom of elements; concrete protected by 2.5 mm thick
rubberized membrane on top slab. Steel plates are cathodically protected.
rubberized membrane on top slab. Steel plates are cathodically protected.
Mortar pumped over gravel foundation bed.
1.5 of stone cover