成都裂隙性黏土流变特性试验  

Experimental Study on Rheological Behaviors of Chengdu Fissured Clay

作　　者：张晓超[1] 许模[1] 

机构地区：[1]成都理工大学地质灾害防治与地质环境保护国家重点实验室,四川成都610059

出　　处：《实验室研究与探索》2010年第4期27-29,32,共4页Research and Exploration In Laboratory

基　　金：四川省教育厅重点实验室专项基金项目(07ZZ001);成都理工大学青年科学基金项目(2008QJ18)

摘　　要：以成都裂隙性黏土为对象,进行一系列室内试验,探讨了成都裂隙性黏土的流变特性。通过三轴固结不排水蠕变试验,得到不同围压下各级偏应力水平的全过程蠕变曲线和应力—应变等时曲线,对试验结果做了讨论,并建立了蠕变方程。其中应变—时间关系采用伯格斯模型,应力—应变关系采用指数函数的蠕变方程,拟和曲线与试验曲线很好的吻合,较好地表达了土体的应力—应变—时间关系。On the basis of a series of triaxial creep tests of Chengdu fissured clay,rheologic behaviors of the fissured clay were researched.The CU triaxial creep tests of Chengdu fissured clay under different confining pressures were carried out by using multi-grade loading mode,the full-process creep curves under different confining pressures and the equal-time stress-strain curves were obtained,and the creep models of Chengdu fissured clay were proposed,in which exponential function is adopted for stress-strain re...

关 键 词：蠕变试验 裂隙性黏土 蠕变模型 流变特性 伯格本构模型 

分 类 号：TU411[建筑科学—岩土工程]