含有机质粉质粘土的压缩试验与性状分析  

Compression Test And Analysis of Behavior for Organic Silty Clay

作　　者：杨磊[1] 赵金勇[1] 蒋刚[1] 

机构地区：[1]南京工业大学土木工程学院,江苏南京210009

出　　处：《江苏建筑》2008年第2期38-40,共3页Jiangsu Construction

基　　金：江苏省教育厅高校自然科学研究项目(01KJB410001)

摘　　要：通过重铬酸钾法测定了取自南京河西地区土样的有机质含量在5%～10%之间,判定其为有机质土。根据比较南京地区一般粉质粘土的物理力学指标,发现有机质土的含水率、孔隙比、压缩系数都远大于南京地区一般粉质粘土,说明该土样属于高孔隙比、高液限、高压缩性土,且随着土样中有机质含量的增大,其含水率、孔隙比、液塑限、压缩性逐渐增大。后又采取上述有机质土进行压缩-回弹再压缩试验研究,土样的残余变形比弹性变形大得多。Measuring the organic content from 5% to 10% of soil in Hexi area of Nanjing city by Potassium Bichromate Method, determining it as organic soil. Comparing physical mechanical properties index of Nanjing silty clay soil sample and discovering that water content, void ratio, compressibility of organic soil are greatly more than that of Nanjing silty clay soil sample, explaining that the organic soil is high in water content, void ratio, liquid limit and plastic limit . The derived results show that the more organic matters there are in soil, it is higher in water content, void ratio, liquid plastic limit and compressibility. Then Study on the property of organic silty clay under loading and unloading condition, the results show that the residual deformation of soil is greatly more than elastic deformation of soil.

关 键 词：有机质粉质粘土 孔隙率 压缩回弹 变形 

分 类 号：TU441.2[建筑科学—岩土工程]