A soil-water characteristic curve model for soils with considering effect of initial void ratio

被引：0
|
作者：
Zhang W. [1 ]
Li H. [2 ]
Lei H. [1 ]
Liu H. [3 ]
机构：
[1] Department of Civil Engineering, Tianjin University, Tianjin
[2] School of Civil Engineering, Central South University, Changsha
[3] School of Airport Engineering, Civil Aviation University of China, Tianjin
来源：
Zhongnan Daxue Xuebao (Ziran Kexue Ban)/Journal of Central South University (Science and Technology) | 2021年 / 52卷 / 07期
基金：
中国国家自然科学基金;
关键词：
Initial void ratio; Mathematical approach; Soil-water characteristic curve;
D O I：
10.11817/j.issn.1672-7207.2021.07.025
中图分类号：
学科分类号：
摘要：
In order to describe the effects of initial porosity ratio and matric suction on soil effective saturation, a water-soil characteristic curve calculation model was proposed based on FREDLUND & XING model. The proposed model had good continuity and convergence, and it was suitable for the description of hydraulic characteristics of different types of soils. The material parameters contained in the model could be calibrated by the least square method from the test results. The results show that this model can accurately describe the water-soil characteristic curve of unsaturated soil and reflect the influence of initial porosity ratio. For the same matric suction, the effective saturation of soil decreases with the increase of the initial porosity ratio, while the change rate decreases with the increase of matric suction. © 2021, Central South University Press. All right reserved.
引用
收藏
页码：2394 / 2401
页数：7
相关论文
共 32 条
  • [1] TULLER M, OR D., Retention of water in soil and the soil water characteristic curve, Encyclopedia of Soils in the Environment, 4, pp. 278-289, (2004)
  • [2] FREDLUND M D, WILSON G W, FREDLUND D G., Use of the grain-size distribution for estimation of the soil-water characteristic curve, Canadian Geotechnical Journal, 39, 5, pp. 1103-1117, (2002)
  • [3] REN Xingwei, KANG Jianyu, REN Junjie, Et al., A method for estimating soil water characteristic curve with limited experimental data, Geoderma, 360, 15, (2020)
  • [4] ZHAI Qian, RAHARDJO H, SATYANAGA A, Et al., Estimation of the soil-water characteristic curve from the grain size distribution of coarse-grained soils, Engineering Geology, 267, 20, (2020)
  • [5] YANG Song, WU Junhua, Evaporation characteristics of liquid drops on silt soil surface and the influences on soil-water characteristic curve, Rock and Soil Mechanics, 41, pp. 1-9, (2020)
  • [6] CHU Feng, SHAO Shengjun, CHEN Cunli, Experimental research on influences of dry density and vertical stress on soil-water characteristic curves of intact unsaturated loess, Chinese Journal of Rock Mechanics and Engineering, 33, 2, pp. 413-420, (2014)
  • [7] LI Jinhui, GUO Lingbo, ZHANG Limin, Prediction of SWCC for unsaturated cracked soil considering development process of cracks, Chinese Journal of Rock Mechanics and Engineering, 32, 6, pp. 1288-1296, (2013)
  • [8] FREDLUND D G, RAHARDJO H., Soil mechanics for unsaturated soils, pp. 42-45, (1993)
  • [9] VAN M T, A closed-form equation for predicting the hydraulic conductivity of unsaturated soils, Soil Science Society of America Journal, 44, 5, pp. 892-898, (1980)
  • [10] FREDLUND D G, XING Anqing, Equations for the soil-water characteristic curve, Canadian Geotechnical Journal, 31, 4, pp. 521-532, (1994)
1234