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土-水特征关系是基质吸力和含水率之间的关系。进气值对起点在高饱和度区的脱湿扫描线有较大的影响。Wei等[1]提出了毛细滞回内变量模型,可以对扫描线任意滞回情况进行模拟,但该模型没有考虑进气值的影响,对起点在高饱和度区的脱湿扫描线的模拟与实际情况有一定偏差。基于毛细滞回内变量理论和传统的土-水特征关系经验模型,提出了考虑进气值影响的修正毛细滞回内变量模型。该模型可以考虑进气值对起点在高饱和度区的脱湿扫描线的影响。通过对多种土样的数值模拟计算显示,修正模型较好地解决了原模型对起点在高饱和度区的脱湿扫描线的模拟不能考虑进气值影响的缺点。
The relationship between soil-water characteristic is the relationship between matrix suction and water cut. Intake value has a greater impact on the desorption scan line starting at high saturation. Wei et al. [1] proposed an internal capillary capillary hysteresis model to simulate any hysteresis of the scan line. However, this model does not consider the influence of the intake value and simulates the dehumidification scan line with high starting saturation point There is a certain deviation from the actual situation. Based on the theory of capillary hysteresis internal variables and the traditional empirical model of soil-water characteristic, a modified capillary hysteresis internal variable model considering the effect of intake air value is proposed. The model can account for the effect of intake air on the desorption scan line with the starting point in the high saturation region. Numerical simulations of various soil samples show that the modified model solves the problem that the original model can not consider the influence of intake air value on the simulation of de-wetting scan line starting at high saturation region.