市政桥梁下穿既有铁路运营线桩基施工技术

Pile Foundation Construction Technology of Municipal Bridge Underpass Existing Railway Operating Line

桥梁工程常采用桩基础结构,用于承受桥梁荷载作用。工程对桩基础的质量提出较高的要求,论文以市政桥梁下穿铁路工程为例,介绍了该项目下穿铁路桩基的施工要点,重点分析了桩基施工过程中钻孔灌注桩的具体施工工艺及水下混凝土灌注技术在本项目的应用,保证了下穿铁路桩基的施工质量。

The construction ofbridge projects often adopts pile foundation structure,which is used to bear the load ofbridge.The project puts forward higher requirements for the quality of pile foundation.Taking the underpass railway project of municipal bridge as an example,this paper introduces the key points of the construction of underpass railway pile foundation,focuses on the analysis of the specific construction technology of drilling perfusion and the application of underwater concrete perfusion technology in the construction process of pile foundation,so as to ensure the construction quality of underpass railway pile foundation.