带拱形效应的板桩围堰设计及施工工艺

摘要

九龙江特大桥主2号墩承台为八边形，位于潮涨快、潮差大水域，施工存在很大风险。为解决承台施工难题，通过方案比选，设计了一种带拱形效应的圆端形钢板桩围堰，总结了该板桩围堰的结构优点和施工要点，验证了该板桩围堰设计方法的经济合理性和结构安全性，满足异形承台快速施工的要求。%As for the No.2 main pier bearing platform of Jiulong River Bridge, it is in the form of octagon and located at the area with fast rising tide and large tide scope, thus producing large potential risks in the construction. To solve the construction problems of the bearing platform, we compared some schemes, then designed round end type steel sheet pile cofferdam with arch, summarized the structure advantages and construction points for sheet pile cofferdam structure, and verified the economic rationality of the design method, which can meet the requirements of rapid construction for special-shaped bearing platforms.