非饱和黏性土粒间吸力测试研究  

Experimental study on suctions between grains in unsaturated cohesive soil

作　　者：汤连生[1] 王洋[1] 张鹏程[1] 廖化荣[1] 

机构地区：[1]中山大学地球科学系,广东广州510275

出　　处：《岩土工程学报》2003年第3期304-307,共4页Chinese Journal of Geotechnical Engineering

基　　金：国家自然科学基金资助项目 (50 2 790 56 ;597790 1 9);广东省自然科学基金资助项目 (970 1 2 7)

摘　　要：对粒间吸力的认识是非饱和土有效应力及变形、强度特性研究的基础。由粒间吸力各组成部分的特点 ,提出了非饱和黏性土粒间吸力的测试原理和方法 ,并对红黏土的粒间吸力进行了试验。Study on effective stress and on mechanic properties of unsaturated soils is based on the knowledge about the suctions between grains. In the light of the charateristic of the components of the suctions between grains in cohesive soil, the principle and method of testing the suctions are given and expounded, and the suctions between grains in red clay are measured and analysed.It is found that the influenecs of degree of saturation on the shear strength of cohesive soils are caused not only by the matrix potential in soil but also by the variable structure suction and absorbed suction. The large influences of the chemical composition of water in small opening on the suctions between grains in soils are different from those on the variable structure suction and absorbed suction.

关 键 词：非饱和土 粒间吸力 抗剪强度 饱和度 测试 黏性土 

分 类 号：TU447[建筑科学—岩土工程] TU411.7[建筑科学—土工工程]