条带式加筋土挡墙模型试验研究  

On Model Experiment of Geobelts Reinforced Earth Retaining Wall

作　　者：石朗晶[1] 李贤[1] 骆龙炳[1] 王冯哲[1] 曹烨楠[1,2] 

机构地区：[1]西南大学工程技术学院土建类大学生创新训练中心,重庆400716 [2]Department of Civil and Environmental Engineering,Carnegie Mellon University,pittsburghpa15213

出　　处：《西南师范大学学报（自然科学版）》2013年第6期136-140,共5页Journal of Southwest China Normal University(Natural Science Edition)

基　　金：国家级大学生创新创业训练计划资助(201210635113);国家自然科学基金项目资助(10902091);中央高校基本科研业务费专项资金资助(XDJK2010C014);西南大学科研基金资助项目(SWU208010)

摘　　要：通过进行加筋挡土墙的模型试验研究,初步探讨了加筋挡土墙结构工作的基本原理.发现加筋土挡墙的作用机理主要是由于筋带对土体的加筋作用改善了挡墙的变形特性,保证了挡土墙的稳定.加筋土挡墙最大位移通常发生在中部偏下处,挡墙工作中处于距底部高度为1/3处面板滑移最大.有限元计算与按规范计算出的滑裂面有明显差异,在挡墙中部及以下,两者的滑裂面形状类似,但是在挡墙上部,有限元法所得与规范推荐破裂面相差很大,规范推荐破裂面有一定的局限性,在设计时应考虑用其他方法补充计算,确保结构安全.A model experiment of reinforced earth retaining wall has been carried out to study the basic principle of retaining wall. By comparison of the mechanical behaviors, we have found in the model experi ment and FEM analysis that the basic mechanical principle of reinforced walls is something that the geobe- lts could improve the characteristic of the earth, hence increasing the safety of the wall. The largest settle- ment of the panel locate at the 1/3 place of the wall from the bottom. The results of the experiment and FEM analysis match well. We have also found that the simulated slip plane is of great difference with that recommended in the Standard JTJ 015 -91： The lower half part of the slip plane by FEM method is con- sistent with the standard codes; however, the FEM results imply large difference for the upper half part of the slip plane. This result structural design to ensure shows a limitation of the standard codes, and we should consider it in further the safety of the structure.

关 键 词：加筋土挡墙 模型试验 内部破裂面 有限元分析 

分 类 号：TU411[建筑科学—岩土工程]