Study of moisture migration and frost heave model of freezing saturated soil

doi:10.16285/j.rsm.2015.04.025

	Study of moisture migration and frost heave model of freezing saturated soil
	Zeng, Gui-Jun; Zhang, Ming-Yi; Li, Zhen-Ping; Pei, Wan-Sheng
刊名	岩土力学
	2015-04-10
卷号	36 期号:4 页码:1085-1092
关键词	饱和正冻土水分迁移冻胀模型分凝冰冰压力
ISSN号	1000-7598
DOI	10.16285/j.rsm.2015.04.025
其他题名	饱和正冻土水分迁移及冻胀模型研究
文献子类	Article
英文摘要	Under a large temperature gradient, the freezing front moves fast in a freeing soil and pore water transits into ice, resulting in local volumetric expansion. However, because the temperature gradient is generally small in a natural environment, water migrates from unfrozen areas to the freezing area, and crystalizes in some position, where pore ice accumulates and ice segregation occurs. Because the frost heave induced by ice segregation is much more significant than that induced by local volumetric expansion, it is very important to establish a model to simulate the moisture migration and ice segregation formation process. Based on the secondary heave theory, a frost heave model of freezing saturated soil is developed. The proposed model assumes that the flow rate in freezing fringe is constant for each time step. Thus, the water pressure is firstly calculated in freezing fringe, and then ice pressure is obtained based on the Clapeyron equation. The magnitude of the ice pressure is used as a criterion of ice segregation formation, with assuming that when new ice segregation occurs, old ice segregation stops growing. This model also considers the velocity of moisture migration and heave rate as basic unknown quantities, and simulates the heave under similar natural conditions where soil has overburden pressure at the top boundary and nonpressure water supply at the bottom. By comparing the numerical simulations to experimental results, the validity of the model is validated. ©, 2015, Academia Sinica. All right reserved.
学科主题	Meteorology ; Atmospheric Properties ; Water Supply Systems ; Soils And Soil Mechanics ; Metallography ; Thermodynamics ; Food Processing Operations
出版地	Wuhan
项目编号	中国科学院"百人计划"项目(张明义博士) ; 中国科学院西部行动计划项目 ; 中国科学院知识创新工程重要方向项目 ; 中国科学院青年创新促进会资助
语种	中文
CSCD记录号	CSCD:5406490
内容类型	期刊论文
源URL	[http://ir.lzu.edu.cn/handle/262010/182427]
专题	土木工程与力学学院_期刊论文
通讯作者	Zeng, Gui-Jun
推荐引用方式 GB/T 7714	Zeng, Gui-Jun,Zhang, Ming-Yi,Li, Zhen-Ping,et al. Study of moisture migration and frost heave model of freezing saturated soil[J]. 岩土力学,2015,36(4):1085-1092.
APA	Zeng, Gui-Jun,Zhang, Ming-Yi,Li, Zhen-Ping,&Pei, Wan-Sheng.(2015).Study of moisture migration and frost heave model of freezing saturated soil.岩土力学,36(4),1085-1092.
MLA	Zeng, Gui-Jun,et al."Study of moisture migration and frost heave model of freezing saturated soil".岩土力学 36.4(2015):1085-1092.