非饱和膨胀土与红粘土的对比试验研究及微观结构分析  

Comparative Laboratory Study and Microstructure Study on Unsaturated expansive soil and red clay

作　　者：滕珂[1] 肖宏彬[1,2] 许豪[3] 金文婷[1] 

机构地区：[1]湖南工业大学岩土工程研究所,湖南株洲412007 [2]中南林业科技大学,湖南长沙410004 [3]中国石化集团河南石油勘探局勘察设计研究院,河南南阳473132

出　　处：《公路工程》2010年第5期4-9,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：针对广西南宁膨胀土与株洲红粘土变对比试验研究,将2种土样的压缩蠕变特性在不同含水率情况下进行了比较。试验结果表明:与株洲红粘土相比,广西南宁膨胀土在较小含水率条件下有明显的加速蠕变阶段,而在大含水率条件下这一阶段也同样不明显。并通过电子显微镜对两者进行了微观研究。On the basis of Comparative Laboratory Study Nanning expansive soil and Zhuzhou red clay,a contrast on compression creep characteristics between those two under different water contents has been made.The results shows that compared with the Zhuzhou red clay,Nanning expansive soil under relatively small water contents,has a obvious accelerated creep stage.While under relatively great water contents,the stage is unobvious.What more,a microstructure study has been made over electron microscope as well.

关 键 词：膨胀土 红粘土 蠕变 微观结构 

分 类 号：U416.03[交通运输工程—道路与铁道工程]