库区动态水位桥梁浮动平台设计施工技术

Design and Construction Technologyof Floating Platform of Dynamic Water-table Bridge in Reservoir Area

连续刚构桥梁各项施工工艺逐渐成熟,但施工作业环境又根据现场的施工条件各不相同。依托宜昌百岁溪大桥工程,针对三峡库区水位动态变化条件下桥梁施工的难题,通过浮动平台设计施工,解决了大桥桥梁钻孔桩基础、承台、墩柱及上部结构施工作业面的问题,为大桥的施工创造了有利条件。为同类工程施工提供借鉴。

Various technologies for continuous rigid frame bridge are getting increasingly mature. But construction environments differ from on-site construction conditions. Relying on the project of Baisuixi Bridge in Yichang and aiming at the difficulty of bridge construction under the condition of dynamic watertable in Three Gorges, this paper solves the problems faced by constructions of foundation, bearing platform, pier, and upper structure of bored piles through the design and construction of floating platform, which creates favorable conditions for construction of the bridge and is of great referential value for similar project constructions.