摘要
以某城市道路框架涵结构下穿铁路桥梁施工过程为研究对象,采用midas GTS NX建立三维有限元计算模型,计算道路支护体系施工、基坑开挖回填及运营荷载施加3个施工阶段铁路桥梁的变形。以高速铁路变形控制指标为评价标准,对各施工阶段铁路桥梁顺桥向、横桥向和竖向累积变形结果进行分析。结果表明,道路框架涵各施工阶段对既有铁路桥梁基础沉降及轨道平顺性影响较小,满足铁路桥梁沉降及变形控制指标要求。
The urban road frame culvert structure underpass the railway bridgeis researched,and the Midas GTS NX software is used to establish a three-dimensional finite element model to calculate the railways’ deformation of the three construction stages,foundation pit excavation,backfilling of foundation pit and operation load.Using the high-speedrailway’s deformation controlling index as the evaluation standard,the railway bridges’ cumulative deformation curve oftransverse and vertical displacement in various construction stagesis analyzed.The analysis results show that the influence of the urban road frame culvert structure construction stage on existing railway bridge foundation and track regularity on the railways is small,which meets the requirements of the inter-city railways deformation controlling index.
作者
万巧
吴彪
王杰
WAN Qiao,WU Biao,WANG Jie(1.Central Southern Geotechnical Design Institute Co.,Ltd.,,Wuhan 430074,China;2.China Railway Siyuan Survey and Design Group Co.,Ltd.,Wuhan 430063,Chin)
出处
《交通科技》
2018年第4期25-29,共5页
Transportation Science & Technology
关键词
城市道路
下穿铁路桥梁
变形控制指标
累积变形
urban road
underpass the railway bridge
deformation controlling index
cumulative deformation
