Bay Area Rapid Transit Tunnel
TOTAL IMMERSED LENGTH: 5,825 m
DEPTH AT BOTTOM OF STRUCTURE: 40.5 m
HEIGHT: 6.5 m
WIDTH: 14.6 m
ENVIRONMENTAL CONDITIONS: Constructed across the San Francisco Bay
FABRICATION METHOD: On shipways and endlaunched.
DEPTH AT BOTTOM OF STRUCTURE: 40.5 m
HEIGHT: 6.5 m
WIDTH: 14.6 m
ENVIRONMENTAL CONDITIONS: Constructed across the San Francisco Bay
FABRICATION METHOD: On shipways and endlaunched.
San Francisco, California,
United States
Bay Area Rapid Transit System.
Trans-Bay Constructors and joint venture of Peter Kiewit & Sons Co., Raymond International, Tidewater Construction Col, and Healy Tibbets Construction Co.
Joint Venture: Parsons-Brinckerhoff-Tudor-Bechtel
83.2 to 111.6 m
5,825m
40.5m
Project construction
1970-04-30
58
Two tubes; one track each
6.5m
14.6m
Longest immersed tube tunnel. Triaxial earthquake joints. Ventilation building
constructed as caisson. Connections to shield-driven soft ground tunnels.
constructed as caisson. Connections to shield-driven soft ground tunnels.
On shipways and endlaunched.
At dockside near site.
Constructed across the San Francisco Bay
Catamaran barges straddling elements
Double rubber gasketted joints with steel closure plates.
Special triaxial earthquake joints.
Special triaxial earthquake joints.
Continuous steel shell; cathodic protection system.
Screeded foundation. Sand fed into screed box.
0.6 m fill plus 1.6 m stone blanket.