平动模式下墙后有限黏性填土破坏模型试验研究  

Model test study on failure of finite cohesive backfill behind retaining wall under translational mode

作　　者：王润北 吴能森 WANG Run-bei;WU Neng-sen(College of Transportation&Civil Engineering,Fujian Agriculture&Forestry University,Fuzhou 350108,China)

机构地区：[1]福建农林大学交通与土木工程学院,福建福州350108

出　　处：《河南城建学院学报》2024年第4期72-79,共8页Journal of Henan University of Urban Construction

基　　金：福建农林大学产学合作项目(KH1500590)。

摘　　要：以挡土墙背和临近建筑物间的有限黏性填土为研究对象,通过透明土的模型试验以及PIVlab的图像分析,研究平动模式下墙后土体变形特征及破坏规律。结果显示:在挡土墙背离填土平动的过程中,剪切滑动面逐渐形成,并产生二次滑动,最终演变为一条由墙踵贯穿至填土表面的二次曲线形滑动面,与水平方向夹角为57°,填土有限与半无限的界限为b/h=0.7;有限宽度下填土的破坏形式与半无限工况不同,滑动面在临近建筑物墙面产生交点,与水平方向夹角约为55°,未出现砂土“反射”多道的现象。Based on the model test of transparent soil and the image analysis of PIVlab,the deformation characteristics and failure rules of soil behind the retaining wall under the translational mode are studied by taking the finite cohesive fill between the back of the retaining wall and adjacent buildings as the research object.The results show that in the process of the retaining wall moving away from the backfill,the shear sliding surface gradually forms and produces secondary sliding,and finally evolves into a quadratic curved sliding surface running from the wall heel to the fill surface,with an angle of 57° to the horizontal,and the limit between finite and semi-infinite fill is b/h=0.7.The failure mode of the backfill under the finite width is different from that under the semi-infinite condition.The sliding surface has an intersection point on the wall of the adjacent buiding,with an angle of about 55° to the horizontal,and there is no multiple reflection like sand.

关 键 词：平动模式 有限黏性填土 土体破坏模式 滑动面特征 

分 类 号：TU43[建筑科学—岩土工程]