非饱和重塑膨胀土一维压缩蠕变特性试验研究  

Experimental Study on One-dimensional Compression Creep Characteristics for Unsaturated Remodeling Expansive Soil

作　　者：肖宏彬[1] 许豪[1] 滕珂[1] 范志强[1] 

机构地区：[1]湖南工业大学岩土工程研究所,湖南株洲412008

出　　处：《公路工程》2009年第6期1-7,共7页Highway Engineering

基　　金：湖南省自然科学基金资助项目(08JJ3092);湖南省教育厅重点资助项目(07A017)

摘　　要：针对南宁膨胀土进行了一系列室内试验研究,探讨了非饱和重塑膨胀土在一维压缩试验下的流变特性。试验结果表明:预压土样含水率接近最优含水率时流变现象明显,非线性程度随应力和时间的增长而增强,无预压土样流变现象不明显;预压600 kPa土样出现四阶段非衰减加速蠕变破坏;终应变随含水率的增大而增大、预压压力的增大而减小。On the basis of a series of indoor tests for Nanning expansive soils, rheological characteristics of one-dimensional compressioon experimental for the unsaturated remodeling expansive soils have been researched. The results shown that there is the obvious rheological phenomena of preloading soil sample with optimal water content, nonlinear degree of soil increased with increase of stress and time, but unpreloading soil sample is opposite; and there is non-attenuate accelerate creep damage of four-phase of preloading soil sample with 600kPa; the changes of final strain is directly proportional to water content, inverse ratio to preloading pressure.

关 键 词：非饱和重塑膨胀土 一维压缩 流变 

分 类 号：U416.03[交通运输工程—道路与铁道工程]