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Steel and concrete caisson, 68×122×108 ft, was designed to serve as ventilation structure for Trans-Bay Tube portion of San Francisco Area Rapid Transit system; structure also provides transition between sunken tubes under bay and shield-driven subway tunnels on landward side; entire structure is enclosed within steel skin of all-welded construction; it was fabricated on shipway and at outfitting pier, then floated out to site; remainder of concrete was added to sink building into position; placement of concrete was designed so that building would remain level during any pour; structure is protected from corrosion by system of cathodic protection. (07558)
Steel and concrete caisson, 68×122×108 ft, was designed to serve as ventilation structure for Trans-Bay Tube portion of San Francisco Area Rapid Transit system; structure also provides transition between sunken tubes under bay and shield-driven subway tunnels on landward side; entire structure is enclosed within steel skin of all-welded construction; it was fabricated on shipway and at outfitting pier, then floated out to site; remainder of concrete was added to sink building into position; placement of concrete was designed so that building would remain level during any pour; structure is protected from corrosion by system of cathodic protection. (07558)
BART tube ventilation building
Civ Eng (NY)
Warshaw, R. (Autor:in)
1968
4 pages
Aufsatz (Zeitschrift)
Englisch
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