电法填埋场渗漏检测极化噪声的剔除方法  

Elimination of polarization noise in electrical detection of landfill leakage

作　　者：管绍朋[1] 

机构地区：[1]山东工商学院通信工程系,烟台264005

出　　处：《地球物理学进展》2010年第6期2209-2213,共5页Progress in Geophysics

基　　金：国家高技术研究发展计划(863)项目(2007AA061303);山东省自然科学基金项目(Y2008B60)联合资助

摘　　要：电学填埋场渗漏检测方法是利用漏洞电流引起的感应电势异常来定位防渗膜上的漏洞位置.当漏洞电流较小时,检测电极上的极化电位噪声极易将电势的异常值淹没,导致漏洞定位的失败.基于电极极化电位噪声的特点,提出了采用低频交变方波供电的方式来剔除该类噪声.在小型模拟填埋场中的实验结果表明:当回路电流为70mA,膜上供电电极接电源正极时,防渗层上的两个漏洞只有一个被检出;膜上供电电极接电源负极时,则两个漏洞皆未被检出;将两次实验数据对应相减,则两个漏洞皆被准确定位.The electrical detection of landfill leakage is widely used to locate leaks in the liner. The potential anomaly induced by the current flowing through the leaks determines the leak location. When the leak current is small, the abnormal potential is easily submerged by polarization potential noises in the detecting electrodes resulting in a failure of leak locating. We suggest adopting low-frequency alternating square-wave power supply to eliminate polarization potential noise. The experiments results show that one of the two leaks in the liner is detected when the loop current is 70 mA and the electrode above the liner is connected to the positive pole of a power supply. All the two leaks cannot be found when the electrode above the liner is connected to the negative pole of a power supply with the same loop current. The two leaks are all located by the result of subtraction between the two experimental data.

关 键 词：填埋场 渗漏检测 电学方法 极化电位噪声 

分 类 号：P631[天文地球—地质矿产勘探]