• 关键词：填埋场  渗漏检测  高压直流电法  直流电路模型

• 基金项目：国家高技术研究发展计划(863)重点项目(No.2007AA061303);山东省自然科学基金项目(No.Y2008B60)

• 管绍朋
• 1. 山东工商学院通信工程系, 烟台 264005; 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

• 能昌信
• 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

• 董路
• 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

• 王利岗
• 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

• 摘要：为研究垃圾填埋场的导电特性,建立了一种填埋场直流电阻电路模型,并对回路中的各部分电阻进行了分析.结果表明:随着供电电极直径和入土深度的增加,回路电阻减小,而随着供电电极与漏洞之间距离的增大,回路电阻缓慢增加;漏洞电阻由接触电阻和内阻组成,前者远大于后者,对一个半径为1cm的圆形漏洞来说,接触电阻可达1500Ω,而内阻只占到接触电阻的1/10;在供电电极周围浇水可明显降低回路电阻,在场内电极直径为20mm,入土深度为0.4m,电极与漏洞之间距离为20m时,浇水后的回路电阻可减小26.6%.

• Abstract：Adirect current resistance circuit model was established in order to study the electrical properties of a landfill and identify leaks.Every part of resistance in this model was analyzed.The results show that:① the loop resistance increases slowly in proportion with the distance between the power electrode and a leak,but decreases in inverse proportion with the diameter and the buried depth of the power electrode;② the leak resistance consists of the contact resistance and the internal resistance.The former is much larger than the latter.For a circular leak with a radius of 1 cm,the contact resistance is up to 1500 Ω,while the internal resistance is only ten percent of the former;③the loop resistance can be reduced significantly by watering the material around the power electrodes.Areduction of 26.6 percent in resistance appears after watering on the condition that the electrode diameter is 20 mm,the buried depth is 0.4 m,and the distance between the electrode and the leak is 20 m.

• Key words：landfill  leakage detection  high voltage direct current method  direct current circuit model

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