地铁引起大地振动的有限元分析  

The Finite Element Analysis of Ground Vibration Induced by Subway

作　　者：涂勤明[1] 雷晓燕[1] 

机构地区：[1]华东交通大学铁路环境振动与噪声教育部工程研究中心,江西南昌330013

出　　处：《华东交通大学学报》2013年第1期26-31,共6页Journal of East China Jiaotong University

基　　金：国家自然科学基金项目(U1134107);江西省优势科技创新团队计划项目[2010]210

摘　　要：运用大型有限元软件ANSYS建立了地铁隧道动力分析模型,分析了带桩基础的隧道结构、隧道埋深及大地参数对地铁引起大地振动响应的影响。计算结果表明:底部带桩基础的隧道结构对地面振动有明显的减振效果,桩基础越长,减振效果越好;隧道埋深对地铁引起大地振动有较大影响,地面振动强度随埋深的增加而减小;大地土层参数对地面振动的影响与激振频率有关。Via finite element method software ANSYS,the dynamical analysis model of train-tunnel interaction is established.And effects of the tunnel structure type with pile foundations,burial depth of tunnels,and ground parameters on the ground vibration induced by subway are then analyzed.The calculation results show that the tunnel structure type with pile foundations is effective for reducing the ground vibration.The longer piles are,the better the reduction effect is.Burial depth of tunnel has great influence on ground vibration caused by subway.And the ground vibration intensity decreases as the burial depth of tunnel increases.The impact of ground parameters on ground vibration is related to the exciting frequency.

关 键 词：地铁 大地振动 隧道埋深 振动加速度 

分 类 号：U491.93[交通运输工程—交通运输规划与管理]