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详细介绍了非饱和土-水力学参数联合测试系统,该系统分别利用轴平移技术和达西定律测定非饱和土土-水特征曲线和水相渗透系数。通过试验结果对比可以发现,由联合测试系统确定土-水特征曲线与压力板仪溢出水校正称量法确定的土-水特征曲线接近,但由联合测试系统确定的试样残余含水率比使用压力板仪溢出水校正称量法确定的试样含水率要小;由联合测试系统确定的渗透函数,当饱和度较大时,实测值与模型预测值较为接近;当饱和度较小时,实测值与模型预测值相差较大。
The joint test system of unsaturated soil-hydraulic parameters is introduced in detail. The system uses the axial translation technique and Darcy’s law respectively to determine the soil-water characteristic curve and the water-phase permeability coefficient of unsaturated soil. Through the comparison of the test results, it can be found that the soil-water characteristic curve determined by the joint test system is close to the soil-water characteristic curve determined by the calibrated weighing method of overflow of the pressure plate instrument. However, the residual moisture content of the sample determined by the joint test system is lower than that of the soil- Pressure plate overflow water calibration method to determine the moisture content of the sample to be smaller; by the joint test system to determine the infiltration function, when the saturation is large, the measured value and the model predictive value is closer; when the saturation is small, the measured The values differ greatly from the model predictions.