不同密实度土的微结构与其土水特性间的关系  

Relationship between microstructure and soil-water characteristic of different density clay

作　　者：冯望[1] 李顺群[1,2] 张彦[1,2] 

机构地区：[1]天津城市建设学院土木工程系,天津300384 [2]天津市软土特性与工程环境重点实验室,天津300384

出　　处：《辽宁工程技术大学学报（自然科学版）》2013年第5期611-614,共4页Journal of Liaoning Technical University (Natural Science)

基　　金：国家自然科学基金资助项目(51178290);教育部科学技术研究重点基金资助项目(210004)

摘　　要：针对土体微观结构与其宏观力学特性之间的关系问题,采用常规固结实验、土水特征曲线实验和扫描电镜观察的方法,研究了土体微结构与其土水特性之间的关系.结果表明:在排水过程中,随着平面孔隙比增大,土样含水度呈现出先增大再减小的变化趋势.在吸水过程中,随着平面孔隙比的增大,土样含水度呈现出先增大后减小再增大的变化趋势.土样的排水能力和吸水能力达到最大值时,其对应的平面孔隙比是不同的.To solve the problem of the relationship between microstructure and macro mechanical properties, this paper studied the relationship between microstructure and soil-water characteristics index by means of common settlement consolidation, SWCCs experiment and scanning electron microscope test. The result of study shows that, in the process of drainage, freeness of water is firstly enlarged and then diminished as the increasing of plane void ratio. But in the process of water absorption, freeness of water is firstly enlarged and secondly diminished and then enlarged again as the increasing of plane void ratio. The corresponding plane void ratio of maximum drainage and water absorbing capacity is different.

关 键 词：微观结构 宏观力学特性 非饱和土 固结 土水特征曲线 土水特性 平面孔隙比 趋势 

分 类 号：TU411.92[建筑科学—岩土工程]