岩土力学2017，Vol.38Issue(4)：1015-1022,8.DOI:10.16285/j.rsm.2017.04.012
分散性土蠕变特性试验研究
An experimental study of creep properties of dispersive soil
摘要
Abstract
The drained triaxial compression creep tests were conducted on the dispersive soil of Ningmute Hydraulic Project by using a stress triaxial creep meter to investigate the creep deformation law under different initial conditions and to develop a creep model and its parameters.Experimental results show that the dispersive soil is a typical creep material and its creep deformation characteristics are quite obvious.It experiences three creep stages which include instantaneous creep deformation,attenuation creep deformation and constant speed creep deformation.The data also indicate that the creep rate and creep magnitude of dispersive are significantly governed by the water content of soil,confining pressure and deviatoric stress level,and stress-strain curves exhibit obvious nonlinear.Mesri model and Singh-Mitchell model are employed to describe creep properties of dispersive soil.By comparing with experimental results,it is found that the creep properties of dispersive soil can be described more accurately and easily by Mesri model than Singh-Mitchell model.Moreover,Mesri model has the characteristic of less parameters and strong applicability.关键词
分散性土/三轴蠕变试验/蠕变特性/蠕变方程Key words
dispersive soil/triaxial creep tests/creep properties/creep functions分类
建筑与水利引用本文复制引用
史祥,樊恒辉,刘刚,李普,章润红..分散性土蠕变特性试验研究[J].岩土力学,2017,38(4):1015-1022,8.基金项目
国家自然科学基金项目(No.51379177,51579215) （No.51379177,51579215）
中央高校基本科研业务费专项资金资助(No.ZD2013013).This work was supported by the National Nature Science Foundation of China (51379177& 51579215) and the Fundamental Research Funds for the Central Universities (ZD2013013). （No.ZD2013013）
