安罗黄河特大桥组合钢管桩围堰设计与施工

Design and Construction of Composite Steel Pipe Pile Cofferdam for Anluo Yellow River Bridge

为有效解决在复杂不良地质条件下承台施工作业地下水渗漏问题,本文对安阳至罗山高速公路原阳至郑州段项目黄河特大桥95#主墩承台围堰设计建模计算、施工方法等多方面进行论证分析,总结了一套切实可行的钢管桩+钢板桩组合围堰设计施工方案。结果表明,该理论可以有效提升承台围堰整体强度,缩短建设工期,保障后续承台施工区无水作业环境,为今后相似工程条件下的围堰设计与施工提供借鉴经验。

In order to effectively solve the problem of groundwater leakage during cushion cap construction under complex adverse geological conditions,the design modeling calculation and construction method of the cushion cap cofferdam for 95# main pier of the Yellow River Super Major Bridge of Yuanyang-Zhengzhou section in Anyang-Luoshan Expressway are demonstrated and analyzed,and a set of practical design and construction scheme of steel pipe pile + steel sheet pile composite cofferdam is summarized. The results show that the theory can effectively improve the overall strength of the bearing platform cofferdam,shorten the construction period,ensure the water free working environment in the subsequent bearing platform construction area,and provide reference experience for the cofferdam design and construction under similar engineering conditions in the future.