摘要
为了查找代县地电阻率EW向异常的原因,对测区内主要干扰源近南北走向2012年架设的高压输电线和与之相应的铁塔进行了地电位测量,结果表明,高压输电线和与之相应的铁塔引起NS测道一定的阶跃下降,并对年变幅度有一定影响(对NS测道的影响大于EW),影响观测精度,可能是引起NS测道均方差增大的原因,但从时间上看,高压输电线2012年完成,而EW测道异常出现于2015年,不是此次异常的原因。
To find the cause of the abnormal variation of earth resistivity in EW-trending in Daixian,the ground potential had been measured in main interference sources of the nearly north-south high voltage transmission line set up in 2012 and the corresponding towers in the survey area.The results showed that the high voltage transmission line and the corresponding towers had caused the step-index descent in NS-trending measuring line,also had a certain impact on annual variation amplitude,which was greater in NS-trending measuring line than in EW-trending. Affected the observation accuracy,and may caused the increase of the mean-square deviation in NS-trending measuring line. As viewed from the time,the high voltage transmission line was set up in 2012,thus was not the cause of the abnormal appeared in 2015 in EW-trending measuring line.
出处
《山西建筑》
2016年第36期138-140,共3页
Shanxi Architecture
基金
山西省地震局科研项目(项目编号:SBK-1626)资助
关键词
高压输电系统
铁塔
地电阻率
地电位测量
high voltage transmission system
tower
earth resistivity
ground potential measurement
