深水急流海峡桥梁桩基础群施工关键技术研究

Research on Key Construction Technologies of Bridge Pile Foundation Group in Deep Water Rapids

秀山大桥9~11号墩钻孔桩施工中遇大倾斜裸岩面、大流速、深水海域等复杂环境,通过采用自升降平台船作为起始施工平台,设计双层导向架及可调锁定装置、混凝土锚桩等技术措施,形成稳定的钻孔平台,成功完成了钻孔桩施工作业。该方法安全、可靠、经济,可为类似复杂海域的钻孔桩施工提供借鉴。

In the construction of the drilling pile for Pier 9#~11#of Xiushan Bridge,the complicated environment such as large inclined rock surface,large flow velocity and deep water area is encountered.The double-layer guide frame is designed by using the self-lifting platform barge as the initial construction platform.The locking device,concrete anchor pile and other technical measures are taken to form a stable drilling platform,and finally successfully complete the construction of the bored pile.The method is proved to be safe,reliable and economical,which can provide reference for the construction of bored piles in similar complicated sea areas.