Nonlinear Analyses for the Permeability Coefficient of Frozen Soil

 

Jianjun Liu

Professor, School of Civil Engineering and Architecture, Southwest Petroleum University, China 610500; e-mail: 315245690@qq.com

Jun Xie*

School of Civil Engineering and Architecture, Southwest Petroleum University, China 610500
*: Corresponding Author e-mail: ambitiousxjfeng@163.com

 

 ABSTRACT

As a multi-phase porous medium, frozen soil property is influenced by the shape of soil particle, magnitude, soil temperature, stress and water content etc, therefore the confirmation of the permeability coefficient is extremely complex. According to the character that each component randomly disperses into the frozen soil, combining with the stochastic simulation method, a finite element numerical simulation software-COMSOL is applied to research the correlation between the permeability coefficient and influencing factors in this paper. Results illuminate that the permeability coefficient of frozen soil will increase with the increase of particle size, porosity, and unfrozen water content, in addition, the function relations are nonlinear ones; on the contrary, the permeability coefficient will decrease with the increase of the ice content and the moisture content, similarly the function relations are nonlinear ones. Research results correspond with the measured data and previous research, so it proves that such method is an effective and suitable means to research the frozen soil physical property.

Keywords: Frozen soil; Permeability coefficient; Unfrozen water content; Ice content; Nonlinear law

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