目前,大多土水特征曲线的数字模型都只能预测一组试验数据,且没有考虑试样体积变化对土水特征曲线的影响。本文基于土体孔隙毛细管原理,假定孔隙的最大和最小孔径分布呈正态分布,提出一个考虑土体体积变化的土水特征曲线模型,并将模型预测结果与室内试验结果进行对比,验证了模型的准确性;最后,对模型参数敏感性进行分析。 At present, most of the digital models of soil-water characteristic curves can only predict a set of experimental data and do not consider the influence of sample volume changes on soil-water characteristic curves. In this paper, based on the pore capillary theory of soil, assuming that the maximum and minimum pore size distributions of pores are normally distributed, a soil-water characteristic curve model considering the change of soil volume is proposed. The model prediction results are compared with those of laboratory tests. The accuracy of the model; Finally, the model parameters sensitivity analysis.