高邮台地电阻率受避雷接地线干扰分析  

Interference Analysis of the Resistivity of Gaoyou Station by Lightning Protection Grounding Wire

作　　者：张骞 郭宇鑫 高熹微 蒋延林 李玉 ZHANG Qian;GUO Yu-xin;GAO Xi-wei;JIANG Yan-lin;LI Yu(Gaoyou Seismic Station,Jiangsu Province,Gaoyou 225601,China)

机构地区：[1]江苏省高邮地震台,江苏高邮225601

出　　处：《地震》2023年第2期38-45,共8页Earthquake

摘　　要：通过对2017年7月江苏高邮地震台地电阻率所受干扰核查,发现测区边缘附近架设高压电杆避雷接地线,且避雷接地线相互连接。将接地线视为埋地金属导体,利用良导体电位分布的计算公式对比理论干扰幅度和实际干扰幅度,结果表明接地线的存在改变了测区介质原有的电性结构,形成一条低阻带并造成了人工电场分布的改变,导致地电阻率EW向和NE向测值出现低值。By checking the geo-electrical resistivity of the Gaoyou seismic station in July 2017,it was found that lightning protection grounding wires of high voltage poles were installed near the edge of the survey area,and the lightning protection grounding wires were connected with each other.Taking the grounding line as a buried metal conductor,the theoretical interference amplitude and the actual interference amplitude are compared by using the formula of the good conductor to the potential distribution.The results show that the existence of the grounding wires changed the original electrical structure of the survey area,with a low resistance band being formed and the distribution of artificial electric field changed,which results in low values of earth resistivity in EW and NE directions.

关 键 词：地电阻率 电杆避雷接地 干扰排除 

分 类 号：P315.7[天文地球—地震学]