南宁非饱和膨胀土蠕变特性试验研究  

Experimental Study on Creep Characteristics for Nanning Unsaturated Expansive Soils

作　　者：范志强 肖宏彬[2] 汤艳 

机构地区：[1]长沙建筑工程学校,湖南长沙410004 [2]中南林业科技大学,湖南长沙410004 [3]长沙新动源机电设备有限公司,湖南长沙410004

出　　处：《公路工程》2011年第6期43-47,63,共6页Highway Engineering

基　　金：国家自然科学基金资助项目(50978097);湖南省自然科学基金资助项目(08JJ3092)

摘　　要：通过压缩蠕变试验与改装的剪应力控制式剪切蠕变试验对南宁非饱和膨胀土进行了系列室内试验研究,探讨了非饱和膨胀土的非线性流变特性。试验结果表明:土体具有明显的非线性流变特性。同时,通过对蠕变曲线的拟合可以发现,南宁非饱和膨胀土的流变可以用Bu体模型来描述,并能得出其相应的本构方程和蠕变方程。On the basis of a series of indoor tests for unsaturated Nanning expansive soils through loading test and creep testing apparatus controlled by shearing force,non-liner rheological characteristics of the expansive soils have been researched.The results show that the soil has obvious non-linear rheological behavior.Through the experimental creep curve can be described by Burgers model,the constitutive equation and the creep equation of the expansive soils also can be obtained.

关 键 词：非饱和 膨胀土 压缩 剪切 Bu体模型 

分 类 号：U416.167[交通运输工程—道路与铁道工程]