条形基础砂土地基的破坏模型试验  

Model Test on Disruptive Mode of Strip Sandy Soil Foundation

作　　者：闫芙蓉[1,2] 范文[1] 王勇[1] 何停印 

机构地区：[1]长安大学地质工程与测绘学院,西安710054 [2]河南理工大学土木工程学院,河南焦作454000 [3]河南省地勘局第二地质队,河南焦作454002

出　　处：《防灾减灾工程学报》2010年第2期159-164,共6页Journal of Disaster Prevention and Mitigation Engineering

基　　金：教育部重点项目(109146);国家自然科学基金项目(40972181)资助

摘　　要：为了研究条形基础砂土地基的剪切破坏形式和承载机理,在相似理论的指导下,进行了一组条形基础砂土地基的模型试验,模拟了砂土地基受荷后产生变形、扩展直到破坏的全过程;测量并分析了地基中不同点处的土压力大小及其分布规律,观测了剪切带的形成和发展过程。结果表明,模型试验能够很好地体现砂土地基变形、破坏的整个过程及其沉降变形特性、地基中各点的真实应力状态及其变化规律,对于研究深基坑变形过程和破坏形态具有应用价值。Based on similarity theory,the paper has studied the disruptive mode and the load bearing mechanism of the strip foundation.One model test has been designed to simulate the whole processes from deformation to destruction of the silty clay and the sandy soil foundation.The values in different sites and the distribution rule of earth pressure in the foundation have been analyzed,and the formation and the development process of shear band have been observed.The results show that the model test can well reflect the whole foundation failure process,the subsidence distortion characteristics,the foundation stress distribution,the destruction shape and mechanism.It will be an effective way in studying the disruptive mode and the load bearing mechanism of foundation.

关 键 词：相似理论 条形基础 模型实验 剪切带 砂土地基 

分 类 号：TU411[建筑科学—岩土工程]