土-水特征曲线及其相关性研究  

Study of soil-water characteristical curve and its influential factors

作　　者：卢应发[1] 陈高峰[1] 罗先启[1] 崔玉军 

机构地区：[1]三峡大学三峡库区地质灾害教育部重点实验室,湖北宜昌443002 [2]法国国立路桥大学岩石和土力学实验室,法国巴黎77455

出　　处：《岩土力学》2008年第9期2481-2486,共6页Rock and Soil Mechanics

基　　金：国家自然科学基金项目(No.50779030);国防科工委项目(科工计[2007]838号)

摘　　要：土-水特征曲线(SWCC)描述了土体吸力与含水率之间的关系,是非饱和土力学研究的重要内容。从理论和试验两个方面研究了土-水特征曲线和渗透曲线的相互关系。在理论上,应用自然比例法则研究了土-水特征曲线和渗透曲线的特征,从物理和力学意义两个方面探讨了土-水特征曲线及其导数、渗透曲线、颗粒分布曲线之间的特征,给出了土-水特征曲线和渗透曲线两指数函数表达式幂的取值范围和相互关系。试验研究结果表明:土体的土-水特征曲线受到土体的物质成分、塑性指数、孔隙结构、应力状态等多种因素影响,土体持水特性研究对工程建设具有重要的指导意义。Soil-water characteristics curve （SWCC） describes mainly the relationship of suction and volumetric water content of nonsaturated soil; it is very important to research the fundamental properties of SWCC. The relationship between SWCC and nonsaturated seepage curve has been studied based on theory and experiment, the features of SWCC and of nonsaturated seepage curve are studied by natural proportional rule; then the characteristics among SWCC and its differential curve, nonsaturated seepage curve, grain distribution curve are researched in physics and mechanics; the scope of constant index of SWCC and of nonsaturated seepage function is given; and their relationship is described. The experimental results show that the SWCC is influenced by lots of factors, such as： material compositions, plastic index, porous structure and stress state. The study of SWCC is very important to engineering construction.

关 键 词：非饱和土 自然比例法则 土-水特征曲线 渗透曲线 相互关系 试验研究 

分 类 号：TU411[建筑科学—岩土工程]