摘要
为研究道路施工对邻近既有铁路桥的影响,文中依托贺州莲服大道与既有贵广高速铁路工程案例,通过有限元软件建立了既有铁路桥墩数值仿真模型。研究了路基施工和运营阶段对邻近既有铁路桥墩位移的影响情况,对铁路桥墩的安全系数进行了计算。结果表明,路基施工和运营引起的铁路桥墩在顺桥梁方向铁路桥墩的位移主要集中在2#墩,在横桥梁方向铁路桥墩的位移主要集中在3#墩。道路施工和运营引起的桥墩最大变形为1.14mm,桥墩位移值均处于控制值标准以内并低于监测预警值。路基施工阶段对既有桥墩的影响程度较为显著。
In order to study the influence of road construction on adjacent existing railway bridges,based on the engineering cases of HezhouLianfu Avenue and existing Guiguang high-speed railway,the numerical simulation model of existing railway piers is established by finite element software.The influence of subgrade construction and operation stages on the displacement of adjacent existing railway piers is studied,and the safety factor of railway piers is calculated.The results show that the displacement of railway pier along the bridge direction caused by subgrade construction and operation is mainly concentrated in pier 2,and the displacement of railway pier in the cross bridge direction is mainly concentrated in pier 3.The maximum deformation of pier caused by road construction and operation is 1.14mm.The scheme of crossing the bridge in the form of subgrade meets the specification requirements.The stage of subgrade construction has a significant influence on existing piers.
作者
冯宇
Feng Yu(China Railway Siyuan Group Nanning Survey and Design Institute Co.Ltd.,Nanning,Guangxi 530000)
出处
《江西建材》
2023年第2期88-90,共3页
Jiangxi Building Materials
关键词
既有铁路
数值模拟
安全系数
Existing railway
Numerical simulation
Safety margin
