万方数据资源系统

中国公路学报
CHINA JOURNAL OF HIGHWAY AND TRANSPORT
2007 Vol.20 No.3 P.23-28

数字化期刊

非饱和土水分特征曲线特性

李志清  李涛  胡瑞林 

摘 要:为了描述非饱和土基质吸力与含水量的关系特性,进行了室内外土体水分特征曲线(SWCC)测试,分析了试样物质成分、塑性指数、孔隙结构、应力状态等因素对SWCC测试的影响;在自然边坡、挖方边坡、填方边坡上进行了基质吸力变化规律的实测,对比了在不同应力、填土条件下基质吸力变化规律的差异性.研究结果表明:同一土体的SWCC并不惟一;可以通过同条件下的室内吸湿曲线来模拟现场基质吸力和含水量的关系;当基质吸力为100~1000 kPa时,SWCC呈线性关系,使得基质吸力监测的可操作性大大提高.
关键词:道路工程;非饱和土;试验研究;水分特征曲线;基质吸力;含水量
分类号:U416.1 文献标识码:A

文章编号:1001-7372(2007)03-0023-06

Property of Soil-water Characteristic Curve for Unsaturated Soil

LI Zhi-qing  LI Tao  HU Rui-lin 

基金项目:国家自然科学基金项目(50579002);国家重点基础研究发展计划("九七三"计划)项目(2002CB412702)
作者简介:李志清(1981),男,河北沧州人,工学博士研究生,E-mail:lizhiq-2002@sohu.com.
作者单位:李志清(中国科学院地质与地球物理研究所,工程地质力学重点实验室,北京,100029) 
     李涛(北京交通大学,土木建筑工程学院,北京,100044) 
     胡瑞林(中国科学院地质与地球物理研究所,工程地质力学重点实验室,北京,100029) 

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收稿日期:2006年10月9日

出版日期:2007年5月31日