国道307新建公路桥梁对石太铁路桥梁的影响分析  

Analysis of the Impact of the Newly-built Highway Bridge of National Highway 307 on Shitai Railway Bridge

作　　者：刘晓梁 Liu Xiaoliang(Taiyuan Design Institute of China Railway Engineering Design and Consulting Group,Taiyuan 030013,China)

机构地区：[1]中国中铁工程设计咨询集团太原设计院,太原市030013

出　　处：《北方交通》2024年第7期15-17,共3页Northern Communications

摘　　要：新建公路桥下穿既有铁路桥,会对铁路桥墩及基础产生附加影响。文章以国道307新建公路桥梁下穿石太铁路桥梁为例,分析计算公路桥梁施工过程对铁路桥梁的影响。利用Midas GTS有限元分析软件建立计算模型,通过三种荷载组合方式,对比分析了铁路桥梁桥墩竖向位移、纵向位移、横向位移的变化,求得公路桥梁施工过程中铁路桥梁桥墩产生的最大位移值及其发生阶段。The newly-built highway bridge underpasses the existing railway bridge,which will have an additional impact on the pier and foundation of the railway bridge.Taking the newly-built highway bridge of national highway 307 underpasses Shitai railway bridge as the example,the impact of the construction process of the highway bridge on the railway bridge is analyzed and calculated.The calculation model is established by using Midas GTS finite element analysis software,and the changes of vertical,longitudinal and lateral displacement of railway bridge piers are compared and analyzed through three kinds of load combination modes,and the maximum displacement values and occurrence stages of railway bridge piers during the highway bridge construction are obtained.

关 键 词：桥梁工程 下穿 有限元分析 位移 

分 类 号：U448.14[建筑科学—桥梁与隧道工程]