论文部分内容阅读
土-水特征曲线的研究是非饱和孔隙介质研究的重要部分。完整的土-水特征曲线包括初始脱湿曲线(IDC)、主吸湿线(MWC)和主脱湿线(MDC)3部分。传统的土-水特征曲线实验需要花费较长的时间和精力。以文献中的试验数据为依据,对非饱和土土-水特征关系和岩石的汞注入抽出试验的滞回现象进行了深入研究,提出一个经验模型来模拟MDC曲线。如果已根据试验得到了孔隙介质的IDC和MWC,此模型只需要一个参数,即可得到增量形式的MDC。通过与试验结果相比较,验证了模型对MDC模拟的有效性。
The study of soil-water characteristic curves is an important part of the study of unsaturated porous media. The complete soil-water characteristic curves include the initial IDC, MWC, and MDC 3 sections. Traditional soil-water characteristic curve experiments take a long time and effort. On the basis of the experimental data in the literature, the relationship between soil-water characteristics of unsaturated soil and the hysteresis of Hg injection in rock is deeply studied. An empirical model is proposed to simulate the MDC curve. If the IDC and MWC of the pore medium have been obtained experimentally, only one parameter is required for this model to obtain incremental forms of MDC. Compared with the experimental results, the validity of the model to MDC simulation is verified.