旧金山-奥克兰海湾大桥-东跨

M. Nader, B. Maroney
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引用次数: 0

摘要

旧金山-奥克兰海湾大桥是旧金山湾区的主要交通枢纽,日通行量为26万辆。新桥是指定的生命线结构(在重大地震事件后保持开放以供紧急交通),设计寿命为150年。新桥长3.6公里,由四个不同的结构组成:靠近奥克兰海岸的低层后张拉混凝土箱梁;2.4 km长的节段混凝土箱梁(Skyway);首座自锚式悬索桥(SAS),主跨385米;以及连接Yerba Buena岛隧道东入口的后张混凝土箱梁。该桥于2013年开放,其标志性跨度是自锚式悬索桥(SAS),全长624米,桥面总宽度为79米,除自行车/人行道外,还可容纳10条车道。这个价值64亿美元的大型项目是根据多个合同采购的,并采用传统的设计投标建造方法交付。本文介绍了解决该项目独特挑战的关键设计创新和施工方法。
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The San Francisco-Oakland Bay Bridge – Eastern Span
With daily traffic of 260,000 vehicles, the San Francisco-Oakland Bay Bridge is a major connection in the San Francisco Bay Area. The new bridge is a designated lifeline structure (to remain open for emergency traffic after a major seismic event) with a design life of 150 years. The new bridge is 3.6 km long and consists of four distinct structures: a low-rise post-tensioned concrete box girder near the Oakland shore; a 2.4 km long segmental concrete box girder (Skyway); a first-of-its-kind self-anchored suspension (SAS) bridge with a 385 m main-span over the navigational channel; and a post-tensioned concrete box girder that connects to the east portal of the Yerba Buena Island tunnel. Opened in 2013, the signature span of the bridge is the self-anchored suspension (SAS) bridge with a length of 624 m and a total deck width of 79 m accommodating 10 lanes of traffic in addition to a bike/pedestrian path. The $6.4 billion USD mega project was procured under multiple contracts and was delivered using the traditional design-bid-build method. This paper describes the key design innovations and construction methods which address the unique challenges on this project.
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来源期刊
CiteScore
3.00
自引率
10.00%
发文量
48
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