文献类型：期刊文献

中文题名：碱污染红黏土抗剪强度特性室内试验研究

英文题名：Laboratory Tests on Shear Strength Characteristics of Red Clay Polluted by Alkali

作者：陈筠 赵鹏 何维锋 王麒

第一作者：陈筠

机构：[1]贵州理工学院资源与环境工程学院;[2]贵州省交通规划勘察设计研究院股份有限公司;[3]贵州大学资源与环境工程学院

第一机构：贵州理工学院资源与环境工程学院

年份：2017

卷号：34

期号：12

起止页码：94-100

中文期刊名：长江科学院院报

外文期刊名：Journal of Yangtze River Scientific Research Institute

收录：CSTPCD;;Scopus;北大核心:【北大核心2014】；CSCD:【CSCD_E2017_2018】；

基金：贵州省科学技术基金项目(黔科合J字[2015]2033号);贵州大学研究生创新基金项目(研理工2016041)

语种：中文

中文关键词：碱污染;红黏土;抗剪特性;碱土作用;室内试验

外文关键词：alkali contaminated;red clay;shear properties;action between alkali and red clay;laboratory tests

摘要：为了研究碱污染红黏土的抗剪强度特性,考虑碱液Na OH质量分数和养护时间2个因素,通过室内模拟试验,分析碱液与红黏土的相互作用。试验结果表明:高Na OH质量分数时红黏土的抗剪强度、黏聚力、内摩擦角均增大,存在极大值,极大值出现的时间和碱液Na OH质量分数有关;低Na OH质量分数下红黏土抗剪强度降低,存在极小值,黏聚力呈先增后减,内摩擦角呈先减后增的变化趋势。碱污染红黏土抗剪强度特征为水化、离子吸附、阳离子交换、碱液溶蚀和外力共同作用的结果。
In the aim of researching the shear strength properties of red clay under the condition of alkali pollution,laboratory simulation test with varying lye concentration and curing time was conducted to analyze the interaction between lye and red clay. Results showed that the shear strength,cohesion,and internal friction angle of the alkalipolluted red clay were higher than those of undisturbed red clay when the alkali concentration was high to some extent. The time when shear strength,cohesion and internal friction angle reached maximum was affected by lye concentration. On the contrary,in the presence of low lye concentration,the shear strength of alkali-polluted red clay decreased until a minimum value; while cohesion increased and then decreased,and internal friction angle decreased and then increased. Shear strength behaviors of red clay in the presence of alkali pollution is the result of hydration,ion adsorption,cation exchange,dissolution and external forces.