Experimental Study on Frost-Heaving Force Development of Tibetan Clay Subjected to One-Directional Freezing in an Open System

doi:10.1155/2021/6626149

CORC > 兰州理工大学 > 兰州理工大学 > 理学院

	Experimental Study on Frost-Heaving Force Development of Tibetan Clay Subjected to One-Directional Freezing in an Open System
	He, Pengfei 1,2,3; Xiong, Meng 1,2; Mu, Yanhu 2,3; Dong, Jianhua 1; Na, Xinlei 4
刊名	ADVANCES IN CIVIL ENGINEERING
	2021-01-15
卷号	2021 页码:-
关键词	MODEL TRANSPORT WATER HEAT
ISSN号	1687-8086
DOI	10.1155/2021/6626149
英文摘要	Frost heave of soils involves complex coupled interactions among moisture, heat, and stress, which can cause serious damage to cold regions engineering. In this paper, a series of one-directional freezing experiments were implemented for the Tibetan clay with rigid restraint in an open system. The varying characteristics of the temperature, frost-heaving force, and water replenishment during the freezing process were analyzed under different freezing temperatures (-5, -7, and - 9 degrees C), dry densities (1.65, 1.7, and 1.75 g cm(-3)), and initial moisture contents (11, 14, and 17%) of the soil samples. It was concluded that the freezing of soil samples mainly occurred within 10-25 hours from the beginning of the experiment; hereafter, the soil temperatures tended to be stable. The development of frost-heaving force could be divided into three stages as slow increase, quick increase, and relative stable stages. Low freezing temperature, large dry density, and high moisture content were all the contributors to the frost-heaving process of the soil, which could increase the freezing depth, magnitude of the frost-heaving force, and amount of water replenishment. The variations in water replenishment from the open system corresponded to the three stages of the frost-heaving force but had time lags. The moisture contents at different layers of soil samples were measured after the freezing experiment. The results showed that the freeze part of soil samples experienced a significant wetting, while the unfrozen part experienced drying during the experiment. The degrees of wetting and drying were related to the freezing temperature, dry density, and initial moisture content of the soil samples. The experiment results could provide data support for theoretical study on moisture, heat, and stress coupling in freezing soil.
WOS研究方向	Construction & Building Technology ; Engineering
语种	英语
出版者	HINDAWI LTD
WOS记录号	WOS:000613071600003
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/147339]
专题	理学院土木工程学院
作者单位	1.Lanzhou Univ Technol, Lanzhou 730050, Peoples R China; 2.Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Frozen Soil Engn, Lanzhou 730000, Peoples R China; 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China; 4.Golder Associates Inc, Geotech Grp, Anchorage, AK 99507 USA
推荐引用方式 GB/T 7714	He, Pengfei,Xiong, Meng,Mu, Yanhu,et al. Experimental Study on Frost-Heaving Force Development of Tibetan Clay Subjected to One-Directional Freezing in an Open System[J]. ADVANCES IN CIVIL ENGINEERING,2021,2021:-.
APA	He, Pengfei,Xiong, Meng,Mu, Yanhu,Dong, Jianhua,&Na, Xinlei.(2021).Experimental Study on Frost-Heaving Force Development of Tibetan Clay Subjected to One-Directional Freezing in an Open System.ADVANCES IN CIVIL ENGINEERING,2021,-.
MLA	He, Pengfei,et al."Experimental Study on Frost-Heaving Force Development of Tibetan Clay Subjected to One-Directional Freezing in an Open System".ADVANCES IN CIVIL ENGINEERING 2021(2021):-.