土水特征曲线的一个滞回模型

A hysteresis model for soil-water characteristic curves

分析土水特征曲线滞回模型在非饱和土计算,尤其在非饱和土干湿循环过程计算中的作用.介绍Li的滞回模型并指出该模型存在扫描曲线易于出界的不足.基于Li建模的思路,建立一种新的预测模型,并对其进行修正.修正后的模型可以解决Li滞回模型中存在的问题.通过与试验结果比较,发现该修正模型得出的扫描曲线与试验点吻合较好.

This paper describes the role of the hysteresis model in generating soil-water characteristic curves in the calculation of unsaturated soil mechanics,particularly in calculation during the wet and dry cycle of unsaturated soils.In this paper,Li＇s hysteresis model is introduced,and its shortcomings are pointed out.Based on Li＇s model,a new prediction model was developed and modified.The modified model can be used to overcome the shortcomings of Li＇s model.Through comparison with experimental results,it was found that the scanning curve obtained by the modified model was in good agreement with the experimental data.