One-dimensional vacuum steady seepage model of unsaturated soil and finite difference solution
type: Item
instance of: scholarly article
title: One-dimensional vacuum steady seepage model of unsaturated soil and finite difference solution
zbMATH Open document ID: 1426.76687
DOI: 10.1155/2017/9589638
author: Feng Huang
author: Jianguo Lyu
author: Guihe Wang
author: Hongyan Liu
published in: Mathematical Problems in Engineering
publication date: 2018-11-05T00:00:00Z
review text: Summary: Vacuum tube dewatering method and light well point method have been widely used in engineering dewatering and foundation treatment. However, there is little research on the calculation method of unsaturated seepage under the effect of vacuum pressure which is generated by the vacuum well. In view of this, the one-dimensional (1D) steady seepage law of unsaturated soil in vacuum field has been analyzed based on Darcy's law, basic equations, and finite difference method. First, the gravity drainage ability is analyzed. The analysis presents that much unsaturated water can not be drained off only by gravity effect because of surface tension. Second, the unsaturated vacuum seepage equations are built up in conditions of flux boundary and waterhead boundary. Finally, two examples are analyzed based on the relationship of matric suction and permeability coefficient after boundary conditions are determined. The results show that vacuum pressure will significantly enhance the drainage ability of unsaturated water by improving the hydraulic gradient of unsaturated water.
Mathematics Subject Classification ID: 76S05
Mathematics Subject Classification ID: 76M20
Mathematics Subject Classification ID: 65L12
zbMATH DE Number: 6972697
MaRDI profile type: Publication
full work available at URL: https://doi.org/10.1155/2017/9589638
OpenAlex ID: W2594756543
Wikidata QID: Q59147898
cites work: Seepage analysis based on the unified unsaturated soil theory
cites work: A solution to transient seepage in unsaturated porous media
cites work: Numerical analysis of a one-dimensional infiltration problem in unsaturated soil by a seepage-deformation coupled method
description: scientific article; zbMATH DE number 6972697