裂隙黄土的单参数二元介质模型  

Single parameter binary-medium model of fissured loess

作　　者：范文[1,2] 闫芙蓉[1,3] 邓龙胜[1] 熊伟[1] 

机构地区：[1]长安大学地质工程与测绘学院,陕西西安710054 [2]清华大学水利水电工程系,北京100084 [3]河南理工大学土木工程学院,河南焦作454000

出　　处：《岩土工程学报》2009年第11期1752-1756,共5页Chinese Journal of Geotechnical Engineering

基　　金：中国博士后基金项目(2004036055);国家自然科学基金项目(40972181);教育部重点项目(109146)

摘　　要：为了研究裂隙黄土的结构和变形特性,在岩土破损力学理论框架基础上,把裂隙黄土视作由胶结块和软弱带组合而成的二元介质,将二元介质模型运用于裂隙黄土的研究。通过模型计算分析,得到裂隙黄土的单参数应力应变关系,并将其与三轴试验结果进行了对比分析。结果表明,将岩土材料二元介质模型应用于裂隙黄土特性的研究具有较好的适应性。On the basis of the theoretical framework of breakage mechanics for geo-material, the fissured loess can be regarded as a composite material consisting of bonded blocks and weakened bands, therefore, a fissured loess binary-medium model is formulated. Then the model will be applied to the study of fissured loess. By numerical calculation, the relationship of stress-strain can be obtained. A comparative analysis between the calculated results and triaxial tests is done. The results show that there is a good adaptability to apply the binary medium model to fissured loess.

关 键 词：裂隙黄土 均匀化理论 二元介质模型 三轴试验 

分 类 号：TU444[建筑科学—岩土工程]