斜坡地基上高填方加筋路堤变形应力特征研究  

Study on Deformation and Stress Characteristics of High Fill Reinforced Subgrade on Slope Foundation

作　　者：杨森[1] 王宁[1] 卢萍[1] 唐云[2] 孟宝华[1] 

机构地区：[1]西南科技大学土木工程与建筑学院,四川绵阳621010 [2]四川省地质矿产勘查开发局川西北地质队,四川绵阳621000

出　　处：《施工技术》2014年第17期102-106,共5页Construction Technology

基　　金：国家自然科学基金项目(10602048);四川省科技厅项目(2009YJ0060)

摘　　要：主要以西南地区某高速公路高填方红层填筑路基为研究对象,通过对填料进行击实试验、拉拔试验和静力三轴试验,对填料的基本物理力学性能进行研究,获取填料力学参数并采取合理的本构关系,采用FLAC3D模拟路基在加筋与未加筋状态下变形、应力特征。结果表明:加筋有效抑制了路基的竖向位移、水平位移,控制了路面差异沉降值;减小了土体水平应力、垂直应力,使土体抵抗变形和拉裂的能力得到增强;提高了滑坡的稳定性系数,增强了路基的稳定性。Red bed clay filling embankment of one express highway in southwest China was used as research object in this paper. The basic physical and mechanical properties were researched, the mechanical parameters of the filler were obtained through beating experiment, pull-out test and static triaxial test, and the responding constitutive relation was established. Then the displacement and deformation characteristics of the subgrade were contracted between the soil and the reinforced soil in the use of FLAC3D software. The results showed that the vertical displacement （ uneven settlement） and horizontal displacement of the subgrade were effectively inhibited, the horizontal stress and vertical stress of the soil were reduced after reinforcement. The deformation and cracking resist ability, the stability coefficient of landslide and the stability of embankment were enhanced.

关 键 词：公路工程 路基 应力 数值模拟 边坡稳定性 

分 类 号：U416.12[交通运输工程—道路与铁道工程]