南宁膨胀土和株洲红粘土对比试验研究  

Comparative Experimental Study on Nanning Expansive Soil and Zhuzhou Red Clay

作　　者：许豪[1] 肖宏彬[2] 林明明[3] 

机构地区：[1]中国石化河南石油工程设计有限公司,河南郑州450000 [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房地产管理处,河南南阳473132

出　　处：《公路工程》2015年第1期14-17,38,共5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：通过一系列室内试验,探讨了膨胀土和红粘土在完全相同的试验条件下一维压缩蠕变特性以及回弹特性。试验结果表明:膨胀土的非稳定蠕变速率随含水率的增加而增大;两种土主固结延续的时间均与含水率呈正比,即随着含水率的增大,主固结完成所需的时间也就越长;在低含水率和低竖向荷载作用的条件下,膨胀土的回弹量比红粘土的大。On the basis of a series of indoor tests,one-dimensional compression creep and springback characteristics under the completely identical condition of expansive soil and red clay have been researched. The results shown that the unsteady creep rate of expansive soil is proportional to moisture content. The consolidation duration of two kinds of soils are proportional to moisture content. That is the more water content,the more time of primary consolidation. Under the condition of low water contents and low pressures,the resilience values of expansive soil are bigger than those of the red clay.

关 键 词：膨胀土 红粘土 一维压缩 回弹 对比试验 

分 类 号：U416.167[交通运输工程—道路与铁道工程]