Research on Relationship between Unfrozen Water Content in Soil and Temperature

被引：0

作者：

Wan X. ^{[1
]}

Lai Y. ^{[2
]}

Zhang M. ^{[2
]}

Pei W. ^{[2
]}

机构：

[1] School of Civil Engineering and Architecture, Southwest Petroleum University, Chengdu

[2] State Key Laboratory of Frozen Soil Engineering, Cold and Arid Region Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou

来源：

Tiedao Xuebao/Journal of the China Railway Society | 2018年 / 40卷 / 01期

关键词：

Chemical potential; Freezing temperature; Pore size distribution; The free energy on ice-water interface; Unfrozen water content;

D O I：

10.3969/j.issn.1001-8360.2018.01.019

中图分类号：

学科分类号：

摘要：

The balance equation of ice and water chemical potential was built by taking advantage of the thermodynamic principle for the physicochemical characteristics of water solution. Moreover, the formula of water freezing in different pore sizes was deduced according to the pore distribution characteristics of soil under the assumption of the ideal ice-forming model. In this process, the principle of effective stress was introduced to build the relationship between unfrozen water content and temperature in low temperature. Based on this, a general equation to determine water freezing in soils at different temperatures was proposed. Besides, the rationality and accuracy of this equation have been proved through experimental verification. The results show that the unfrozen water content decreases with freezing temperature exponentially. The increase of the external load and the increase of salt content will cause the curve of unfrozen water content-temperature to move rightward in the coordinate, while the decrease of soil pore sizes results in the anticlockwise rotation of the unfrozen water content curve. The ice crystal in the pores in the soil delays the process of water freezing and the impact of ice crystals on water freezing is increasingly obvious with the decrease of pore size. © 2018, Department of Journal of the China Railway Society. All right reserved.

引用

页码：123 / 129

页数：6

共 22 条

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