铁路桥梁深水基础施工受水文、地质、气象、环境等因素影响较大,施工难度相应较高,投入的机械设备较多,施工工艺较陆地施工更为复杂。然而,随着止水支撑维护结构刚度、稳定性的不断增加及计算机模拟技术的迅猛发展,使得进一步优化深水基础施工设计方案成为了可能,且达到了缩短建设工期、降低工程造价目的。结合厦深铁路长沙湾特大桥70号墩承台施工,对钢板桩围堰的受力进行了详细的计算,可为类似的工程提供参考。%Railway bridge deep foundation construction is influenced by the hydrology,geology,meteorology,and environmental factors,with relatively higher construction difficulty,more investment in machinery and equipment,more complex than land-based construction.However,with the increasing structural stiffness,stability of sealing support and the rapid development of computer simulation technology,it is possible to further optimize the design of the deep water foundation,and to shorten the construction period,and to reduce project cost.In combination of the construction of No.70 pier bearing of Shangshawan Extra-large Bridge in Xiamen-Shenzhen Railway,the paper carries out a detailed calculation of the force of the steel plate pile cofferdam to provide a reference for similar projects.
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