桂林理工大学学报2024，Vol.44Issue(1)：81-85,5.DOI:10.3969/j.issn.1674-9057.2024.01.010
干湿循环作用下镉污染红黏土的变形及强度特征
Deformation and strength characteristics of cadmium-contaminated red clay under dry-wet cycle
摘要
Abstract
Red clay in Lijiang River basin of Guilin with different cadmium ion concentrations subjected to dry-wet cycles at 40℃is taken as the research object in this paper.Triaxial test is conducted to study the effects of cadmium pollution and dry-wet cycles on the deformation and shear strength characteristics of red clay.The re-sults show that the horizontal shrinkage rate,vertical shrinkage rate and volume shrinkage rate of red clay is in-creased with time in an"S"shaped curve under different cadmium concentrations.The peak shear stress of red clay is increased with dry-wet cycles under different cadmium concentrations.With the increasing of dry-wet cy-cles,the cohesive force of cadmium-contaminated red clay tends to increase first and then decreases.Cadmium finishes its damage to the structure of red clay before the dry-wet cycles,so that the internal friction angle rea-ches the limit value,and the more increased of cadmium concentration,the more obvious the mechanical char-acteristics of the damage.关键词
镉污染/红黏土/干湿循环/强度特征Key words
cadmium pollution/red clay/dry-wet cycles/strength characteristics分类
土木建筑引用本文复制引用
余思喆,陈学军..干湿循环作用下镉污染红黏土的变形及强度特征[J].桂林理工大学学报,2024,44(1):81-85,5.基金项目
国家自然科学基金项目(41762022) （41762022）
