Research on influence of air-entry value on capillary hysteresis internal variable model

LI Huan; XIE Bing; XU Hui; HUANG Zhi-quan

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Research on influence of air-entry value on capillary hysteresis internal variable model

更新时间：2026-06-25

- Research on influence of air-entry value on capillary hysteresis internal variable model
- Vol. 33, Issue 9, (2012)
- 作者机构：
  
  1. 华北水利水电学院资源与环境学院,郑州,450011
  2. 桂林理工大学广西建筑新能源与建筑节能重点实验室,广西,桂林,541004
  3. 洛阳理工学院土木工程系,河南,洛阳,471023
  4. 河南省水利第一工程局,郑州,450004
- 作者简介：
- 基金信息：
- DOI：
  CLC： TU411
- Online First：12 September 2012，
  
  Published：2012
- 稿件说明：
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LI Huan, XIE Bing, XU Hui, et al. Research on influence of air-entry value on capillary hysteresis internal variable model[J]. 2012, 33(9).
DOI：

LI Huan, XIE Bing, XU Hui, et al. Research on influence of air-entry value on capillary hysteresis internal variable model[J]. 2012, 33(9). DOI：

摘要

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。

Abstract

Soil-water characteristic relationship is a function about the connection between matric suction and water content. The research shows that the air-entry value has great influence on the drying scanning curve when the starting point of the curve is near the highly saturated level. A capillary hysteresis internal variable model (HIVM) put forward by Wei Changfu is able to simulate the hysteresis characteristic of the scanning curve; but the influence of the air-entry value is neglected. There exist some deviations between the simulation of the drying scanning curve and the factual results. Based on the theory of HIVM and the empirical model about the traditional soil-water characteristic relationship

a modified HIVM is put forward. The influence of the air-entry value on the drying scanning curve whose starting point is near the highly saturated level is considered in this new model. While in drying path

the effects of air-entry value on the scanning curves that the original points at the highly saturated range is considered. According to the data from the simulation calculation to the various soil samples

in the modified HIVM

the influence of the air-entry value on the drying scanning curve is considered; so it is better than the original model.

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