Abstract：To apply the resistivity testing to the laboratory test of sand liquefaction, a resistivity testing device with dynamic triaxial test was investigated and developed. The resistivity calculation methods of saturated sand samples under cyclic loading were analyzed, and two resistivity calculation models of constant diameter model and cosine model were proposed. The results show that the cosine model is more consistent with the actual deformation of sample, and the calculation results are more reliable. The resistivity of saturated sand generally shows downward tendency during liquefaction. After the initial liquefaction, when the resistivity of saturated sand is at the peak value stage, the dynamic pore pressure is almost decreased, which illuminates that the soil appears a certain degree of dilatancy characteristics.
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2022, Vol. 43 
