Study on the effect of seasonal permafrost on soil resistivity

Abstract

Abstract In order to study the effect of seasonal permafrost on soil resistivity, firstly, the resistivity influencing factors were analysed, the soil conductivity model was established, and the effects of permafrost on soil resistivity and the number of freeze-thaw cycles on soil resistivity at different depths were analysed through simulated experimental measurements. The results show that the freeze-thaw cycle will lead to soil structure damage, internal loosening, current conduction is blocked, and resistivity increases; with the rise in the number of freeze-thaw cycles, the soil is gradually solidified, the current conduction is enhanced, and the resistivity gradually decreases and tends to be stabilised; beyond the freezing depth of the soil, the resistivity tends to be stable, almost unaffected by the freeze-thaw cycle. Moreover, in a single freeze-thaw cycle, the effect of freezing on soil resistivity gradually increases as the freezing temperature decreases.