| 填埋场渗漏检测高压直流电法等效电路模型的建立 |
| 摘要点击 1582 全文点击 1936 投稿时间：2004-02-15 修订日期：2004-08-27 |
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| 中文关键词 等效电路模型 电解电容 接触电阻 垃圾填埋场 |
| 英文关键词 equivalent circuit model electrolytic capacity contact resistance landfill |
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| 中文摘要 |
| 通过对400V、350V、300V高压直流工作电压下小型模拟填埋场实验数据的分析 ,提出了简化的模型等效电路 .由于高密度聚乙烯(HDPE)衬层的存在使得模型具有了整流特性 ,其电容大小将随着衬层面积和供电电压的增加而增加 ;供电电极的接触电阻与大地的电阻率成正比 ,与电极的粗细及入土深度有关 .同时 ,接触电阻主要由电极附近的土壤电阻决定 ,大于10倍电极半径以外的土壤对接触电阻的影响不超过全部电阻的10% ,故降低电极附近土壤的电阻率可有效地降低电极的接触电阻 . |
| 英文摘要 |
| An equivalent circuit model is put forward through analysis of the experiment data under the conditions of applying 400V, 350V and 300V DC supply power to a small-scale simulated landfill. Due to the fact that the existence of the HDPE geomembrane liner endows the model with commutating character, the electrolytic capacity increases as the area of geomembrane liner and the supplying electric voltage increase. The contact electric resistance of the power supply electrode is in direct proportion to earth electric resistance rate, and in relation to the diameter of the electrode and the depth of the earth. Moreover, the contact resistance is mainly determined by the earth electric resistance around the electrode (the influence induced by the earth farther than 10 times electrode radius is less than 10 percent of those involved by all resistance), hence decrease of the earth electric resistance rate around the electrode may result in effective decrease of the contact electric resistance of the electrode. |
