摘要
以某城市道路下穿普速铁路桥梁为例,采用Midas GTS/NX软件建立三维有限元模型,分析道路路基方案在开挖、换填、路面施工和运营阶段对铁路桥墩的位移影响。分析结果表明,随着车行道与铁路承台距离的增大,道路对桥墩位移的影响逐渐变小,但此道路即使机动车道位于桥跨中间时,铁路桥墩产生的竖向位移仍不满足规范要求。进而提出此道路在涉铁段采用桩板结构方案,以进一步减小对铁路桥梁的影响。
Taking an ordinary speed railway bridge crossing an urban road as an example,a three-dimensional finite element model is established by using Midas GTS/NX software to analyze the impact of road subgrade scheme on the displacement of railway bridge pier in the stages of excavation,replacement,pavement construction and operation.The results show that with the increase of the distance between the carriageway and the railway cushion cap,the influence of the road on the pier displacement gradually decreases,but even if the motorway is located in the middle of the bridge span,the vertical displacement of the railway pier still does not meet the specification requirements.Then,it is proposed to adopt the pile plate structure scheme in the railway section of the road,so as to further reduce the impact on the railway bridge.
作者
王一莹
WANG Yiying(Xiongan Urban Planning and Design Institute Co.,Ltd.,Rongcheng,Hebei Province,071700 China)
出处
《科技资讯》
2022年第1期96-98,共3页
Science & Technology Information
关键词
城市道路
下穿
普速铁路
位移
桩板结构
Urban road
Cross
Ordinary speed railway
Displacement
Pile slab structure
