Outline
The Tokyo Port Daiichikoro tunnel (Rinkai Tunnel) is a reinforced
concrete immersed-tube tunnel constructed in soft ground under
Tokyo Bay. The tunnel is of enormous scale and was completed
in 2001. With a length of 1,329 m, total immersed tube width
of 32.3 m, and height of 10 m, it carries four lanes of traffic
in both directions. The tunnel sections were pre-cast and
barged into position before being emplaced in an excavated
trench in water where the depth to the natural seabed was
29 m. The trench was then backfilled to provide 2.0 m of cover
over the tunnel. The tunnel is formed from eleven reinforced
concrete tube sections. |