气候变化领域集成服务门户(CCPortal): Experimental Study on Frost-Heaving Force Development of Tibetan Clay Subjected to One-Directional Freezing in an Open System

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DOI	10.1155/2021/6626149
	Experimental Study on Frost-Heaving Force Development of Tibetan Clay Subjected to One-Directional Freezing in an Open System
	He, Pengfei; Xiong, Meng; Mu, Yanhu; Dong, Jianhua; Na, Xinlei
通讯作者	Mu, YH (通讯作者)，Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Frozen Soil Engn, Lanzhou 730000, Peoples R China. ; Mu, YH (通讯作者)，Univ Chinese Acad Sci, Beijing 100049, Peoples R China.
发表日期	2021
ISSN	1687-8086
EISSN	1687-8094
卷号	2021
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.
关键词	MODEL TRANSPORT WATER HEAT
语种	英语
WOS研究方向	Construction & Building Technology ; Engineering
WOS类目	Construction & Building Technology ; Engineering, Civil
WOS记录号	WOS:000613071600003
来源期刊	ADVANCES IN CIVIL ENGINEERING
来源机构	中国科学院西北生态环境资源研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/254087
作者单位	[He, Pengfei; Xiong, Meng; Dong, Jianhua] Lanzhou Univ Technol, Lanzhou 730050, Peoples R China; [He, Pengfei; Xiong, Meng; Mu, Yanhu] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Frozen Soil Engn, Lanzhou 730000, Peoples R China; [He, Pengfei; Mu, Yanhu] Univ Chinese Acad Sci, Beijing 100049, Peoples R China; [Na, Xinlei] 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]. 中国科学院西北生态环境资源研究院,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).