Tokyo Port Dainikoro Tunnel
HEIGHT: 8.8 m
WIDTH: 28.4 m
TOTAL IMMERSED LENGTH: 744 m
DEPTH AT BOTTOM OF STRUCTURE: 23 m
FABRICATION METHOD: At a casting basin near the tunnel site. All six elements were cast at once. Approximately two years were required to establish the basin and produce the elements
WIDTH: 28.4 m
TOTAL IMMERSED LENGTH: 744 m
DEPTH AT BOTTOM OF STRUCTURE: 23 m
FABRICATION METHOD: At a casting basin near the tunnel site. All six elements were cast at once. Approximately two years were required to establish the basin and produce the elements
Tokyo,
Japan
Bureau of Port & Harbour, Tokyo Metropolitan Government
Joint venture of Taisei Corp., Kajima Corp., Ohbayashi-Gumi Ltd, Kumagai Gumi Co Ltd, and Maeda Construction Co Ltd
Bureau of Port & Harbour, Tokyo Metropolitan Government
124m
744m
23m
Project construction
1980-04-30
6
Two tubes; two lanes each
8.8m
28.4m
1. Bentonite mortar mixture was pumped for the foundation of the tunnel elements.
2. Flexible joints for earthquake displacements.
3. Moderate longitudinal prestress used to control cracking and resist earthquake
stress.
2. Flexible joints for earthquake displacements.
3. Moderate longitudinal prestress used to control cracking and resist earthquake
stress.
At a casting basin near the tunnel site. All six elements
were cast at once. Approximately two years were
required to establish the basin and produce the elements.
were cast at once. Approximately two years were
required to establish the basin and produce the elements.
Catamaran barges. Two temporary foundations at free end and steel bracket at primary
end.
end.
Gina/Omega gasket between elements; tension ties were
provided across the joints for earthquake loads.
provided across the joints for earthquake loads.
8 mm steel plate on bottom and sides; 2.5 mm membrane on top of element, protected
with 15 cm of reinforced concrete.
with 15 cm of reinforced concrete.
Bentonite mortar was pumped over stone bedding.
Fine crushed stone on both sides, with rock armor on top.