卫生填埋场黏土衬层密实性试验研究  

Experimental Study on Compactness of Clay Liners in Sanitary Landfill

作　　者：龚育龄[1] 叶腾飞[1] 董路[2] 汤洪志[1] 刘玉强[2] 

机构地区：[1]东华理工大学核工程技术学院,江西抚州344000 [2]中国环境科学研究院固体废物污染控制技术研究所,北京100012

出　　处：《环境科学与技术》2011年第9期9-11,53,共4页Environmental Science & Technology

基　　金：国家高科技研究发展计划(863)项目(2007AA061303);江西科学技术厅节能减排技术示范工程(2009AE01500);江西省教育厅青年科学基金项目(GJJ11141)

摘　　要：开展卫生填埋场中的黏土衬层密实性试验研究对填埋场的工程设计和后期运营具有现实意义。黏土压实的直接影响之一就是孔隙率的减小,并改变黏土的电阻率,为高密度电阻率法在衬层密实性中的调查研究提供了前提条件和物理基础。文章采用高密度电阻率法三种装置(测深、温纳、偶极-偶极)进行对比测量,通过电阻率成像技术对压实黏土的电性特征进行分析研究,确定了偶极-偶极装置反演精度较高。研究结果表明,渗透系数K为1.0×10-5 cm/s的电阻率为40Ω.m左右;K为1.0×10-6 cm/s的电阻率为30Ω.m左右;K为1.0×10-7 cm/s的电阻率为20Ω.m左右。The study on density of clay liners is helpful for design and post-operation of the sanitary landfill.Resistivity change is one of direct impacts of decreasing porosity in compacted clay.The difference of resistivity would provide preconditions and physical basis for high density resistivity method.Three arrays including sounding array,Wenner array and dipole-dipole array were implemented and compared using electrical resistivity tomography technology.Electrical character of the compacted clay was investigated through the performance of resistivity tomography technology,and the inverse results of dipole-dipole array are more accurate.Results indicate that resistivity is about 40 Ω·m at hydraulic conductivity of 1.0×10-5 cm/s,resistivity is about 30 Ω·m at hydraulic conductivity of 1.0×10^-6 cm/s and resistivity is about 20 Ω·m at hydraulic conductivity of 1.0×10^-7 cm/s.

关 键 词：环境工程 黏土衬层 密实性 渗透系数 高密度电阻率法 

分 类 号：X705[环境科学与工程—环境工程]