桥梁跨海湾基础钢板桩围堰施工方案设计与分析

Design and analysis on the steel sheet pile cofferdam of foundation of the suspension bridge across the bay

结合某特大桥跨海湾特殊地段的承台基础围堰支护工程,采用土力学理论对围堰钢板桩支护结构方案进行设计与分析,并与钢筋混凝土套箱围堰加以比较。结果显示:该文采用的钢板桩围堰方案不仅在设计上实现了力学性能的最优化,且钢板桩能重复使用降低工程成本和便于施工,具有良好的技术和经济效益,研究成果为实际工程围堰工程设计与施工提供了参考。

The cofferdam project of the main tower of the suspension bridge across the bay was selected as the subject to study, the theory of the soil mechanics was adopted to design the structural scheme and analyze its mechanical performance, and further to compare with the reinforcement concrete box cofferdam. The research results show that the steel sheet pile cofferdam can not only soundly meet the mechanical requirement, but can be reused to lower the cost and of convenient construction, correspondingly indicating the pile cofferdam possesses significant technical and economic effects. The research will provide some reference for the relevant design and construction of the practical cofferdam project.