列车荷载对衡重式挡土墙土压力及稳定性影响研究  

Influence Study of Train Load on Balance Weight Retaining Wall Pressure and Stability

作　　者：刘运涛[1] 刘少飞[1] 刘昌清[1] 

机构地区：[1]西南交通大学土木工程学院,成都610031

出　　处：《路基工程》2011年第2期27-29,共3页Subgrade Engineering

基　　金：铁道部科技发展项目(2007G039)

摘　　要：利用FLAC-3D建立起三维有限差分衡重式挡土墙模型,研究分析了在墙后填土自重荷载和列车动荷载作用下,挡土墙墙背土压力变化规律,并分析了挡土墙水平作用力、抗滑和抗倾覆稳定系数随车速的变化规律。结果表明:荷载对挡土墙的影响主要集中在上墙的中下部,车速对水平土压力作用点位置以及挡土墙稳定性影响不大。Three-dimensional finite difference model of balance weight retaining wall is established using FLAC-3D.The law of soil pressure on the back of retaining wall under backfilling gravity load and dynamic train load is studied and the law of retaining wall horizontal force and stability factor against slide and overturn with train speed is analyzed.The result shows that load influence mainly concentrates in the middle and lower part of upper wall;train speed has little influence on the position of horizontal pressure point and retaining wall stability.

关 键 词：衡重式挡土墙 列车动荷载 土压力 稳定性 

分 类 号：U417.11[交通运输工程—道路与铁道工程]