EXPERIMENTAL STUDY ON SHEAR CREEP CHARACTERISTICS OF NANNING UNSATURATED REMODELLED EXPANSIVE SOIL
On the basis of a series of laboratory tests on Nanning unsaturated remodelled expansive soil using stress-controlled direct shear instrument, the paper discusses non-linear rheological characteristics of the expansive soil. The results show attenuation creep for the soil under the stress level below 25.5kPa; while obvious non-linear accelerating creeps are measured under the stress level over 25.5kPa. It also indicates that the higher the moisture contents, the more significant the rheological characteristics of soil present; the greater the vertical stress, the faster the deformation rates of soil would be. The creep curves of soil obtained by tests well agree with Burgers model, from which the corresponding constitutive equation and the creep equation would be established.
Unsaturated ezpansive soil shear non-linearity bu model
Hong-Bin Xiao Zhen-Yu Li Zhi-Qiang Fan Hao Xu Ke Teng
Central South University of Forestry and Technology,Changsha Hunan 410004,P.R.China Institute of Geo Central South University of Forestry and Technology,Changsha Hunan 410004,P.R.China Institute of Geotechnical Engineering,Hunan University of Technology,Zhuzhou Hunan 412008,P.R.China
国际会议
长沙
英文
924-930
2009-10-26（万方平台首次上网日期，不代表论文的发表时间）