An Effective Design of Grounding Rods in a Complicated Soil Layer

초록

Soil resistivity measurement must be made at the construction site of a grounding system in order to analyze the soil structure because the performance of grounding system is influenced mainly by the resistivityof the soil surrounding the grounding electrode. Wenner 4-probe arrangement is used most widely by the method to measure soil resistivity and the measured data with the Wenner method are apparent resistivities of the soil. Therefore, the soil structure can be analyzed easily from the measured apparent resistivity, but the real soil resistivity is difficult to know correctly at a particular depth or at a specific location on earth surface, and it is very puzzling problem to decide the scale or the location of an electrode being provided vertically in the subsurface layer. This paper introduces a methode that can be used to decide the suitable burial depth and the electrode scale of a grounding rod effectively using the soil structure analysis equipment based on the new dipole-dipole methode.