岩土力学2009，Vol.30Issue(z2)：249-253,5.
非饱和黏性土的应力-应变关系研究
Research on stress-strain relation of unsaturated cohesive soil
尹俊 1梅岭 1梅国雄1
作者信息
- 1. 南昌航空大学,土木建筑学院,南昌,330063
- 折叠
摘要
Abstract
Based on a hyperbolic model of soil, water content instead of matrix suction is introduced into the hardening parameter of the model to develop a constitutive model on unsaturated soil as simple and feasible as possible. A theory which the disturbed soil sample renews primary stress state before test is put forward, and the test method is improved by it. In order to study stress-strain relation for different water contents, the test simulates undisturbed soil with remolded soil. The test result shows that stress-strain relation of remolded unsaturated cohesive soil essentially accords with hyperbolic model which Kondner put forward. On the basis of studying rule for parameters a and b in the hyperbolic model, functions between parameters a and b and the water contents under confining pressures of 100, 150, 200 and 250 kPa are established. And then the stress-strain relation which the water content is 24.52 % is predicted. The contrast between testing data and predicted results shows that predicted error is relative small, and the results satisfy the demand of expectation.关键词
非饱和黏土/三轴压缩试验/应力-应变关系Key words
unsaturated cohesive soil/ triaxial compression test/ stress-strain relation分类
建筑与水利引用本文复制引用
尹俊,梅岭,梅国雄..非饱和黏性土的应力-应变关系研究[J].岩土力学,2009,30(z2):249-253,5.
