【摘要】 土体电阻率表征土的电阻特性，是评价土体的基本物理指标之一，与土体结构、矿物成分和含水率等因素有关。通过室内试验对不同压实度及脱-吸湿路径下的粉质黏土进行了电阻率测试，探究了压实度和脱吸-湿路径对粉质黏土电阻率变化的影响及其影响机制，利用Gunzel、Waxman模型对试验结果进行对比分析，找出最适用于该粉质黏土在脱-吸湿路径下的电阻率结构模型。结果表明：在低压实度条件下，随着体积含水率的升高，电阻率的下降速率更大；在相同含水率下，土样在脱湿路径上具有更大的电阻率；拟合结果表明Gunzel、Waxman模型在吸湿路径下拟合精度更高。更多还原

【Abstract】 Soil resistivity is one of the basic physical indices to evaluate soil characteristics, which is related to soil structure, mineral composition, moisture content and other factors. In this paper, the resistivity of silty clay samples under different degrees of compaction and desorption-absorption moisture paths are tested through laboratory tests. The effects of degree of compaction and desorption-absorption moisture paths on the resistivity changes of silty clay samples and their influencing mechanisms are investigated. Finally, Gunzel and Waxman models were used to compare and analyze the test results. The most suitable resistivity structure model for the silty clay in the dehumidification and hygroscopic process is identified. The results show that the decrease rate of resistivity is greater with the increase of volumetric water content under the condition of lower degree of compaction. Under the same moisture content, the resistivity of the soil sample on the desorption-absorption moisture path is greater. The fitting results show that the Gunzel and Waxman models have higher fitting accuracy.更多还原