Abstract：In order to further demonstrate the application of electrical resistivity method to detecting the quality of soil-cement mixing piles, the soil-cement core samples taken from site were studied and tested. Based on the tests of core samples for the electrical resistivity under different alternating current frequencies, unconfined compressive strength and permeability, it is found that the electrical resistivity may decrease with the increase of current frequency, and there exists a critical frequency of 50kHz during the variation of electrical resistivity; with the changing of soil layer, both electrical resistivity and unconfined compressive strength have similar variation laws, but the electrical resistivity and the permeability coefficient have opposite variations with soil layer; good linear relationships between unconfined compressive strength and electrical resistivity, between coefficient of permeability and electrical resistivity, or between deformation modulus and unconfined compressive strength can be observed. Furthermore, the formulas for determining unconfined compressive strength, deformation modulus and coefficient of permeability according to electrical resistivity were established. The research results and conclusions can be referred when detecting the quality of soil-cement mixing piles in site.
