In this paper, the change of electrical resistivity and matric suction with volumetric water content is investigated using the electrical resistivity measurement and pressure plate test for different densities compacted granite residual soils. The results show that the resistivity value decreases with increasing water content and dry density, and tends to constant at higher values. The shapes of the soil-water characteristic curve (SWCC) and electrical resistivity-water characteristic curve (RWCC) of the investigated soils are very similar. Both curves of RWCC and SWCC can be well described by the van Genuchten model and observed a better correlation i.e., the fitting parameters of RWCC and SWCC are linearly proportional to each other. Based on these two characteristic curves mentioned above, the modification of the van Genuchten model is proposed to develop a direct relationship between electrical resistivity and matric suction for the compacted residual soils. Moreover, the comparison of fitting parameters of the resistivity-matric suction characteristic curve with RWCC and SWCC parameters is also linearly proportional to each other. It can be concluded that the matric suction is strongly depend on the electrical resistivity of the soil, after knowing the fitting parameters of the RWCC, it may be possible to predict the SWCC from the resistivity data.
展开▼
机译：本文采用电阻率测量和压力板试验研究了电阻率测量和对体积含水量的电阻率和测距含量的变化，不同密度压实花岗岩残留土壤。结果表明，电阻率值随着水含量和干密度的增加而降低，并且在较高值下趋于恒定。调查土壤的土壤 - 水特征曲线（SWCC）和电阻率水特性曲线（RWCC）的形状非常相似。 VAN Genuchten模型可以很好地描述RWCC和SWCC的两条曲线，并观察到更好的相关性I.，RWCC和SWCC的拟合参数彼此线性成比例。基于上述两种特征曲线，提出了van Genuchten模型的改进，用于在电阻率和测压的残留土壤之间产生直接关系。此外，具有RWCC和SWCC参数的电阻率 - 原始抽吸特性曲线的拟合参数的比较也彼此线性成比例。由此可以得出结论，该吸力是极大地依赖于土壤的电阻率，知道RWCC的拟合参数后，有可能从电阻率数据预测SWCC。
展开▼
