摘要
随着全球经济的持续发展,地基土重金属污染现象越来越严重,给工程建设带来严重的危害,而重金属污染土的工程性质研究较少。为进一步揭示锌污染黏土的工程性质,开展了人工制备锌污染土的系统室内试验。试验结果表明:随着锌离子浓度的增加,污染土的土粒相对密度增大,液、塑限减小,塑性指数增大。锌污染土的压缩性增大。压缩系数随锌离子浓度的增大而呈增大的趋势,压缩模量呈减小的趋势。污染土的抗剪强度随锌离子浓度的增大而减小。污染土的不排水不固结应力-应变关系曲线呈应变硬化型,呈塑性破坏特征。
With the sustainable development of global economy , the pollution of heavy metal increases greatly in the foundation soil , thus bringing great harm to engineering construction .A series of tests were performed to study engineering properties of artificial zinc contaminated clay .The results showed that relative density of solid particles and plasticity index increased with the increase in zinc concentration , liquid limit and plastic limit decreased with the increase in zinc concentration .As zinc concentration increased , the compression coefficient of zinc polluted soil was increased whereas the compression modulus was decreased .Shear strength of contaminated soil decreased with the increase of zinc concentration .Stress-strain curves showed that it was a strain-hardening characteristics of zinc contaminated soil under unconsolidated undrained triaxial tests , the destruction of zinc contaminated soil showed a plastic damage characteristics .
出处
《工业建筑》
CSCD
北大核心
2015年第1期118-121,共4页
Industrial Construction
基金
国家自然科学基金项目(41172273
41372281)
中央高校基本科研业务费专项资金资助(JZ2014HGBZ0186)
浙江省自然科学基金项目(LY13E080013)
浙江省公益性技术应用研究计划项目(2014C33015)
关键词
锌离子
污染土
物理性质
强度特性
Zn2+
polluted soil
physical property
strength characteristic
