三门峡地区黄土状粉质黏土非饱和性质试验研究  

Experimental study of unsaturated loess-like silty clay in Sanmenxia area

作　　者：黄志全[1] 陈宇[1] 宋日英[1] 宋丽娟[1] 

机构地区：[1]华北水利水电学院资源与环境学院,郑州450011

出　　处：《岩土力学》2010年第6期1759-1762,共4页Rock and Soil Mechanics

基　　金：教育部留学回国人员科研启动基金资助项目(2010年)

摘　　要：以三门峡地区黄土状粉质黏土为研究对象,通过控制重塑土样的干密度及含水率制备不同状态下的试样,在改进的三轴仪上采用不排水试验法,分别对试样进行非饱和土三轴试验。试验结果表明,黄土状粉质黏土的基质吸力变化规律与土的基本状态有着密切关系,尤其是在相同含水率、相同围压、不同干密度的状态下基质吸力会随着饱和度的增加,出现先增后减的变化规律。通过单元土体中土颗粒组成的结构体参数,分析了这种变化规律。Taking the loess-like silty clay in Sanmenxia area for the study object,using undrained test method on the improved triaxial test instrument,the unsaturated soils triaxial test were carried out by controlling the different dry densities and moisture contents of the remoded soil preparing to different states of samples. The test results show that the matrix suction of loess-like silty clay has a close relationship with the changes of the soil basic state; particularly,in the same moisture content and the same confining pressure,the matrix suction under the different dry densities conditions will increase firstly and then decrease as the saturation increasing. which can be analyzed by the parameters of the structural body making up with the soil particles in the unit soil.

关 键 词：非饱和土 基质吸力 干密度 含水率 饱和度 

分 类 号：TU411[建筑科学—岩土工程]