双衬层填埋场渗漏检测高压直流电法的仿真研究  

Finite element simulation of high voltage direct current electricity technology for double liner landfill leakage detection

作　　者：赵晓慈[1] 杨萍[2] 张以都[1] 王琪[3] 

机构地区：[1]北京航空航天大学机械工程及自动化学院,北京100083 [2]中国矿业大学机电与信息工程学院,北京100083 [3]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：《中国环境科学》2007年第1期76-79,共4页China Environmental Science

基　　金：国家'863'项目(2001AA644010)

摘　　要：根据危险废物填埋场的结构特点,建立了检测层封闭空间的有限元模型;利用膜的高阻特性,确立了检测层电势分布的有限元分析方法.有限元模型中,漏洞所在位置加载+I电流用于模拟漏洞电流,接收电极所在位置加载-I电流用于模拟接收电极电流,检测层中任意点的电势为两电流源在该点感应电势的叠加.上层膜和下层膜渗漏检测实验结果和有限元的计算机模拟结果的比较,证明模型是正确的.通过对影响电势分布因素的分析可知,检测电极越靠近被检测膜、回路电流越大越有利于漏洞检测;渗漏液影响范围越大越不利于检测.According to the structure character of hazardous waste landfill （HWL） a finite element mode （FEM） of HWL detection sealed space was established; the finite element analysis technique of detection layer sealed space electrical potential distribution was determined. In FEM, the leak cave position adding electric current ＋I was used to simulate the leak cave current; the received electrode position adding electric current -I was used to simulate the received electrode, in detection layer, the electric potential of random point was the repeated addition of two electric current sources. Comparing the results of upper and lower membranes leakage test and finite element computer simulation proved that the model was correct. Through analyzing the distribution factor influencing electrical potential, the more near the detection electrode to the detected membrane and the greater the loop electric current, the more favorable to cave detection; the greater the influence range of the leaked liquor, the more the unfavorable to the detection.

关 键 词：填埋场 渗漏检测 有限元模型 

分 类 号：X705[环境科学与工程—环境工程]