初始含水率对粉质粘土压缩特性的影响研究

摘要

以粉质粘土为研究对象,以不同初始含水率为控制条件,对粉质粘土做标准固结实验,研究不同初始含水率对粉质粘土压缩特性的影响,结果表明,对于土的压缩e-p曲线,初始含水率低的e-p曲线在初始含水率高的e-p曲线上方,在100～400kPa内,通过定义孔隙指数I可以把不同初始含水率的I-lgp曲线大致归化于一条曲线上;在12.5～100kPa,初始含水率对土的压缩性能影响较大,在100～400kPa内,初始含水率对土的压缩性能影响较小;初始含水率与压缩系数大致呈线性关系,但随着压力的增大,初始含水率对土的压缩系数的影响逐渐变小.%In this paper,silty clay is taken as the object of study.Under different initial water content as control conditions,the effect of different initial water content on the compression characteristics of silty clay is studied by standard consolidation test of silty clay.The results show that the e-p curve with low initial water content is above the e-p curve with high initial water content.In 100 ～400kPa,the I-lgp curve of different initial moisture content can be roughly converted to a curve by defining the pore exponential I.In the case of 12.5 ～ 100kPa,the initial moisture content has a great influence on the compressive performance of soil.In 100 ～ 400kPa,the initial moisture content has less influence on the compression performance of soil.The initial moisture content and the compression coefficient are roughly linear,but as the pressure increases,the effect of initial moisture content on the compressibility of soil decreases gradually.