地电阻率观测中两种电极接地电阻测量方法及其对比研究

Comparative study on two kinds of electrode grounding resistance measurement methods in geo-resistivity observation

利用传统三极接地电阻率测量方法对井下电极接地电阻进行测量会存在较大的测量误差,表明该方法已不适用于井下电极接地电阻测量。针对此问题,提出了利用台站现有地电阻率仪器进行电极接地电阻测量的新方法—直接测量法,并使用传统三极法和直接测量法对北京平谷地震台井下观测供电电极接地电阻进行了测量。测量结果表明:与传统三极法对比,直接测量法的测量结果更为准确、可靠,而且节省人力、物力和时间。

When using the traditional three-pole method to measure the underground electrode grounding resistance,there will be a large measurement error,which suggests that the method will not be suitable for the underground electrode grounding resistance measurement.In view of this problem,this paper proposes a new method for measuring the electrode grounding resistance by using the geo-electric resistivity observation system,which is so called direct measurement method.And then,the grounding resistances of the underground observation power supply electrodes of Pinggu seismic station in Beijing were measured by using the traditional three-pole method and the direct measurement method.The measurement results show that,compared with the traditional three-pole method,the direct measurement method can get more reliable measurement results with less error,and can save human and material resources and measuring time.