高速铁路路堤对地面环境振动的影响分析  

Analysis on the Influence of High-speed Railway Embankment on Ground Environmental Vibration

作　　者：张光明[1] 贺玉龙[1] 杨立中[1] 

机构地区：[1]西南交通大学地球科学与环境工程学院,成都610031

出　　处：《工业安全与环保》2014年第1期54-57,共4页Industrial Safety and Environmental Protection

基　　金：国家自然科学基金面上项目(41272322);教育部新世纪优秀人才支持计划项目(NCET-11-0710);中央高校基本科研业务费专项资金资助(SWJTU12CX003)

摘　　要：为研究高速铁路路堤对地面振动的影响规律,建立了路堤-地基系统的三维快速拉格朗日动力计算模型,计算了均匀地基条件下列车通过路堤时引起地面不同方向振动的特点,分析了路堤高度和路堤体积模量对地面振动的影响。结果表明,列车通过路堤时引起的地面振动中以竖向振动和横向振动为主,地面振动强度随远离路堤的距离增加逐渐衰减,其中纵向振动衰减最快,竖向振动在一定的范围内出现了振动反弹增大的现象;路堤具有减轻地面振动的作用,并且随路堤高度和路堤体积模量增加,横向和竖向地面振动强度均表现出明显的减小趋势,可见对地面环境振动进行预测时应考虑路堤的影响。In order to study the law of embankment affecting ground vibration, the three - dimensional fast Lagrange dynamic calculation model d embankment - foundation system is built. The propagation characteristics of different direction ground vibration induced by the train moving on the embankment are analyzed in uniform foundation eonditiom by using nu- mericul simulation method, and the influence of embankraent height and bulk modulus on ground vibration also be analyzed. The results show that, the vertical vibration and tramverse vibration is major in the ground vibration; The vibration strength gradually decreases with the increase distance away from the embankment,the attenuation rote of longitudinal vibration is the fastest and the vertical vibration is rebound increased in a certain distance; the embankment has the fimction of reducing ground vibration, and the vertical and longitudinal vibration strength obviously decreases with the increase of embankement height and bulk modulus, so the embankment plays an important part in predicting the ground vibration.

关 键 词：地面振动 数值模拟 列车 路堤 

分 类 号：U213.11[交通运输工程—道路与铁道工程]