残余状态下粉砂流变性的三轴试验研究

摘要

Triaxial compression tests with constantstrain-rate are performed on samples retrieved from a slope withslow movement experience.The viscous properties of the fine sand under airdried condition are observed.Theresults include:(1 )The rate effect,showing by the increase in strength with strain rate,is quantified by ratesensitivity coefficient.(2)The research focuses on the viscous properties at residual state,which shown by partiallydecay of stress jump induced by a sudden change of strain rate with the increase in displacement.The decay isquantified by using the rate sensitivity coefficient.(3)The effect of viscous property on the residual strength isshown by the rate effect and relaxation.%采用现场采集的土样，实施恒定位移速率的三轴试验，分析了风干条件下粉砂的流变性。主要研究成果包括：（1）采用速率敏感系数量化分析了速率效应，即位移速率加大强度增加的现象。（2）着重研究了残余状态下的特殊流变性，即位移速率效应引起的应力跳跃随着位移的增加而部分消失的现象，并通过速率敏感系数进行了量化分析。（3）通过讨论速率效应和应力松弛现象，分析了流变性对该土样残余强度的影响。