杭州湾跨海大桥关键技术研究与实施

Key technologies for Hangzhou Bay Bridge

杭州湾跨海大桥地处强潮海湾,建设条件复杂,工程规模大,为解决跨海长桥设计和施工中遇到的特殊困难和问题,对GPS全天候测量控制技术,大型预应力混凝土箱梁预制、运输和架设,大直径超长钢管桩设计、制造、防腐和施工,海洋环境混凝土耐久性,灾害天气对大桥行车安全影响等关键技术问题进行了专项研究,并付诸工程实施,解决了海上长桥工程测量、大型预应力混凝土箱梁早期裂缝控制、重型箱梁梁上运输和架设、大直径钢管桩施工及混凝土耐久性等工程技术难题,为保障大桥顺利建设和运营期行车安全及桥梁使用寿命提供了理论依据和工程指导,并为我国跨海桥梁建设积累了经验。

Due to the complicated construction condit ion and the large scale of bay bridges, the design and construction of Hangzhou Bay Bridge would inevitably encounter numerous obstacles during construction. A series of key technologies, such as GPS-based all-weather survey and control technique, prefabrication, transport and erection of large scale pre-stressed concrete box girders, design, manufacturing, preservation and construction of large-diameter extra-long steel tube piles, durability of concrete structure in the marine environment, influences of catastrophic weather on traffic safety, and the corresponding application methods are proposed. Solutions are presented for the survey of the long-span bay bridge, early-stage crack control of large scale pre-stressed concrete box girders, transport and erection of heavy box girders, construction of large-diameter steel tube piles and durability of concrete, etc. The results will serve as a theoretical foundation and guidance for successful construction, operation safety and sufficient durability of Hangzhou Bay Bridge, and also as a reference for design and construction of other bay bridges in China.