Analysis on Grounding Resistance Affected by Heterogeneous Soil

In the most actual grounding project, we always come across a block or some blocks of soil whose resistivity is higher than that of soil surrounding them, that is heterogeneous soil. Effects on grounding resistance by heterogeneous soil under different conditions are different. On the basis of simulation by grounding analyzing engineering software CDEGS, this paper analyses effects on grounding resistance by heterogeneous soil under conditions of different surrounding soil resistivity, as well as different section area size, depth and thickness of heterogeneous soil, all of which provides evidence for building more accurate soil model in the grounding design under complex soil situation.