杭州湾大桥50m整体预制箱梁施工难点与对策

Construction Challenges and Countermeasures for 50-m Span Integrally Precast Box Girders of Hangzhou Bay Bridge

杭州湾跨海大桥南岸滩涂区是大桥施工的咽喉工程,其上部结构采用50m箱梁整体预制、梁上运梁施工工艺。结合施工环境特点,分析了50m整体预制箱梁施工特点与难点,并提出相应的工程对策。

The part of Hangzhou Bay Bridge at the tidal flat area on the south bank is a vital link in the construction of the overall Bridge. The superstructure of the part of the Bridge is designed as 50-m span concrete box girders that are constructed with integral precasting technology, and are delivered to their erection sites via erected girders. In accordance with the construction environment of the Bridge, the construction features and challenges of the 50-m span girders are analyzed and corresponding countermeasures against the challenges are provided as well.