施工车辆荷载对低路堤软土地基的影响深度分析  

Analysis on the influential depth of construction vehicle load in low embankment soft subsoil

作　　者：孙吉书 梅林健 杨辉 SUN Jishu;MEI Linjian;YANG Hui(School of Civil and Transportation Engineering,Hebei University of Technology,Tianjin 300401,China;Tianjin Binhai New Area Expressway Investment ＆ Development Co Ltd,Tianjin 300450,China)

机构地区：[1]河北工业大学土木与交通学院,天津300401 [2]天津滨海新区高速公路投资发展有限公司,天津300450

出　　处：《河北工业大学学报》2018年第4期93-97,共5页Journal of Hebei University of Technology

基　　金：天津市交通运输委员会科技计划项目(2014-12)

摘　　要：为了分析施工车辆荷载在低路堤软土地基中的分布规律与影响深度,本文通过预埋在天津滨海新区西外环高速公路低路堤及软土地基中的动土压力盒,进行了不同工况下的动土压力测试,系统分析了施工车辆轴载、行车速度对不同深度处动土压力的影响规律,以及轴载、车速对施工车辆作用深度的影响规律,结果表明,动土压力峰值随着轴载、行车速度的增大而显著增大,随着埋置深度的增大而减小;施工车辆荷载的影响深度随着轴载、行车速度的增大而显著增大,考虑超载的情况下,施工车辆荷载的影响深度可达3.0 m,需要在低路堤设计中充分考虑.In order to investigate the distribution law and influential depth of construction vehicle load in low embank- ment soft subsoil, dynamic soil pressure under different conditions using dynamic earth pressure cells embedded in the low embankment and soft subsoil of Tianjin Binhai New Area west ring expressway. The influential law of construction vehicle axle loads and speed on the dynamic soil pressure of different depth were studied. Construction vehicle axle loads and speed on the influential depth were studied, too. The results show that the maximum, dynamic soil pressure would increase with the increase of axle load and vehicle speed, and decrease with the increase of the depth. The influential depth of construction vehicle load would increase significantly with the increase of axle load and vehicle speed. The influential depth of construction vehicle load in low embankment soft subsoil is about 3.0m on considers overloading. These need to be fully considered in the low embankment design.

关 键 词：低路堤 车辆荷载 动土压力 影响深度 软土地基 

分 类 号：U416.1[交通运输工程—道路与铁道工程]