毛细作用对拓宽道路的变形影响研究  

Study of the Capillary Effect on the Deformation of Widened Road

作　　者：吴朝阳 宗金辉 田野 王顺 WU Zhao-yang;ZONG Jin-hui;TIAN Ye;WANG Shun(School of Civil Engineering and Transportation,Hebei University of Technology,Tianjin 300400,China)

机构地区：[1]河北工业大学土木与交通学院

出　　处：《公路》2018年第9期37-41,共5页Highway

基　　金：河北省科技计划项目,项目编号16275406D

摘　　要：为了深入了解毛细作用对拓宽路基的影响,文中在数值模拟的基础上,建立了拓宽路基三维模型,分析了毛细作用对拓宽道路沉降变形特性的影响,并分别研究了差异土质、台阶设计尺寸、新填路基高度对路基差异沉降的影响。结果表明,在毛细作用的影响下拓宽道路两侧的差异沉降均呈＂~＂形,且毛细水上升高度对差异沉降有着显著影响。另外,通过控制台阶高宽比及路基高度可以有效缩小差异沉降。In order to understand in-depth the influence of capillary action on widened subgrade,on the basis of numerical simulations,3-D model is established,the settlement and deformation characteristics of widened subgrade are analyzed,and the influence of different soil property,step size and filling height on differential settlement of subgrade are studied.The results show that under the influence of capillarity,the differential settlement on both sides of widened subgrade has shown a＂~＂shape;the lifting height of water has significant impact on the differential sedimentation.Further,control of the aspect ratio of the step and subgrade height can effectively reduce the differential settlement.

关 键 词：拓宽路基 毛细作用 差异沉降 台阶开挖 路基高度 

分 类 号：U418.8[交通运输工程—道路与铁道工程]