浙西饱和红黏土的物理力学特性试验研究

发布时间：2018-08-18 10:38

【摘要】：本文在分析浙西红黏土矿物成分与化学成分的基础上,分别用单向固结仪和三轴仪对饱和红黏土原状样进行了一系列的压缩、剪切、蠕变试验,得到其压缩曲线、应力-应变曲线和蠕变曲线。根据测得的压缩曲线,确定了该土的压缩指数Cc、回弹指数Cs,对原状样压缩曲线的归一化整理后判断出原状饱和红黏土的结构性不强;根据三轴排水剪切试验结果,得出原状饱和红黏土在不同围压下因结构性的存在土体具有不同的破坏应力比,计算得到该土的临界状态应力比和黏聚力;根据原状饱和红黏土在不同固结压力下的蠕变试验结果,得到了该土的次固结系数Cα与固结压力关系,并确定了该土的Cα/Cc约为0.0124,本试验结果为浙西地区的工程建设提供了基本参数。
[Abstract]:Based on the analysis of mineral composition and chemical composition of red clay in western Zhejiang, a series of compression, shear and creep tests were carried out on saturated red clay samples by unidirectional consolidation instrument and triaxial apparatus respectively, and the compression curves were obtained. Stress-strain curve and creep curve. According to the measured compression curve, the compression index C _ c and the springback index C _ s of the soil are determined. After normalizing the compression curve of the undisturbed sample, it is concluded that the structure of the undisturbed saturated red clay is not strong, and the results of the triaxial drainage shear test show that the structure of the undisturbed saturated red clay is not strong. The failure stress ratio of the original saturated red clay under different confining pressure is different due to the existence of soil structure, and the critical stress ratio and cohesive force of the soil are calculated. According to the creep test results of undisturbed saturated red clay under different consolidation pressures, the relationship between the secondary consolidation coefficient C 伪 and the consolidation pressure is obtained. It is determined that the C 伪 / C c of the soil is about 0.0124, which provides the basic parameters for the engineering construction in the west of Zhejiang.
【作者单位】：上海大学土木工程系;衢州学院建筑工程学院;
【基金】：国家自然科学基金项目资助(41402271)
【分类号】：TU446

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