穿越既有铁路桥的管道基坑施工对桥墩影响的安全评估分析

Safety Assessment Analysis of the Influence of Pipeline Foundation Pit Construction Crossing the Existing Railway Bridge on Bridge Piers

文章以某穿越铁路工程的管道施工工程为研究背景,对管道穿越多条铁路桥梁段基坑施工全过程进行安全评估,利用Midas GTS-NX软件将全部工程元素建模,分析各关键环节铁路桥梁基础沉降及变形情况。研究表明,基坑施工会对既有铁路桥梁墩顶沉降及变形产生影响,且存在不对称变形,部分节点存在安全隐患,研究成果可为同类型工程设计及施工提供参考。

Based on the research background of a pipeline construction project crossing railway project,this paper carries out safety assessment of the whole process of foundation pit construction on the section where the pipeline crosses multiple railway bridges.Midas GTS-NX software is used to model all engineering elements and analyze the settlement and deformation of railway bridge foundation in each key link.The research shows that the foundation pit construction will affect the settlement and deformation of the pier top of the existing railway bridge;there is asymmetric deformation;and some nodes have potential safety hazards.The research results can provide reference for the design and construction of similar projects.