深水双壁钢围堰施工技术探讨

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摘  要：某大桥桥墩位于深水河流中，承台类型为低桩承台，设计施工采用双壁钢围堰方案。该文通过对双壁钢围堰的制作、安装、下放和封底施工技术进行总结梳理，分析各个阶段的操作方法和重点管控措施，以及对施工中可能会出现的问题展开论述，提出一些应对措施和处理方法，为同类钢围堰的施工积累经验。

关键词：深水施工；低桩承台；双壁钢围堰；下放系统；吸泥；砼封底

中图分类号：U445.55      文献标志码：A          文章编号：2095-2945（2024）29-0189-04

Abstract： The pier of a bridge is located in the deep-water river， the type of cap is low pile cap， and the design and construction of double-wall steel cofferdam is adopted. This paper summarizes the construction technology of double-wall steel cofferdam， analyzes the operation methods and key management and control measures in each stage， discusses the problems that may occur in the construction， and puts forward some countermeasures and treatment methods， so as to accumulate experience for the construction of similar steel cofferdams.

Keywords： deep water construction; low pile cap; double-wall steel cofferdam; lowering system; mud suction; concrete bottom sealing

目前跨江或跨海大桥已比较常见，水上作业受水流、潮汐、水流深度等影响较大，一般来说，水上桩基施工完成之后紧接着要做水上大型围堰。（剩余4130字）