【摘要】 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。更多还原

【Abstract】 Soil water characteristic curve(SWCC) is one of the most important parameters for unsaturated porous media.Full SWCC is made up of 3 parts,which are initial drying curve(IDC),main drying curve(MDC) and main wetting curve(MWC) respectively.A lot of time has to be spent to perform a traditional hydralic hesteresis test.Based on the data from literatures,an empirical model is developed.Provided IDC and MWC in a certain porous media have been obtained by tests;this model,including only one material parameter,can be used to simulate an incremental-type MDC in the porous media.It is found that the simulating results agree well with the measured data;and it is shown that the proposed model is capable to describe MDC.更多还原