非饱和膨胀土的土-水特征曲线研究  

A STUDY ON SOIL-WATER CHARACTERISTIC CURVE OF UNSATURATED SOIL

作　　者：毛尚之[1] 

机构地区：[1]建设部综合勘察研究设计院,北京100007

出　　处：《工程地质学报》2002年第2期129-133,共5页Journal of Engineering Geology

摘　　要：在干旱和半干旱地区 ,土体中含水量的变化常会引发各种工程问题。研究表明 ,非饱和土的工程性质不仅取决于土的组成、结构和应力状态 ,还与土中的吸力密切相关。非饱和土的土 -水特征曲线表达了土体中含水量与吸力的关系 ,是非饱和土研究的重要内容之一。作者通过对某膨胀土土 -水特征曲线的试验研究 ,比较了渗析技术方法和轴平移技术法的结果 ,初步分析了应力及吸力历史等因素对土In arid and semi-arid region, some engineering problems emerged due to the change of water content in soils. It is known that the behavior of unsaturated soil depends not only on the mineralogical composition, soil structure, and stress state, but also on soil suction. The relationships between water content and suction in the soil can be expressed as soil-water characteristic curves (SWCC). Based on the test on SWCC of an expansive soil, the result obtained by using osmotic techniques is compared with that by convenient method. The influence of the stress and suction histories on the SWCC is studied.

关 键 词：非饱和膨胀土 土-水特征曲线 吸力 应力 

分 类 号：P642.115[天文地球—工程地质学] P642.13[天文地球—地质矿产勘探]