干旱区生态环境知识资源中心(Arid): Covering Effects under Diurnal Temperature Variations in Arid and Semiarid Areas

Arid

DOI	10.1155/2020/7496182
	Covering Effects under Diurnal Temperature Variations in Arid and Semiarid Areas
	Liu, Feifei 1; Mao, Xuesong 1; Xu, Cheng 1; Li, Yingying 1,2; Wu, Qian 1; Zhang, Jianxun 1
通讯作者	Mao, Xuesong
来源期刊	ADVANCES IN CIVIL ENGINEERING
ISSN	1687-8086
EISSN	1687-8094
出版年	2020
卷号	2020
英文摘要	Covering effects dominated by water vapor migration in arid and semiarid areas threaten the stability of engineering entities. To explore the covering effects dominated by water vapor migration under the influence of diurnal temperature variations, a series of one-side evaporation experiments were conducted. Characteristics of water vapor migration between the unsaturated loess soil column with and without a lid were compared in detail to illustrate the covering effects on water vapor migration, as were the effects of test time. Further, the characteristics of covering effects in loess and sand soil columns were compared. The results show that the covering effects formed in the loess soil column with a lid by cycling day and night temperature differences led water vapor to accumulate and condense beneath the lid. However, unlike the covering effects during freezing conditions that lead to a significant increase in the moisture content in the top layer, in this study, the moisture content in the top layer (0-8 cm) decreased. Although soil lid and the soil covering effects exist in both loess soil columns with and without lids, the soil covering effects for the former are much more obvious, and the moisture content in the upper part of the loess soil column (8-45 cm) shows a significant increase. By cycling day and night temperature differences, the covering effects or soil covering effects grew as the test time increased. Compared to the loess soil column, the covering effects in the sand soil column were extremely weak, and the moisture migration in the sand soil column was dominated by the downward movement liquid water. This paper illustrates the covering effects under the influence of diurnal temperature variations and reveals the mechanism of water vapor migration in subgrade soils in arid and semiarid areas.
类型	Article
语种	英语
国家	Peoples R China
开放获取类型	gold, Green Published
收录类别	SCI-E
WOS记录号	WOS:000518935700004
WOS关键词	RESILIENT MODULUS ; WATER-CONTENT ; SOIL-WATER ; HEAT ; EVAPORATION ; TRANSPORT ; MOISTURE
WOS类目	Construction & Building Technology ; Engineering, Civil
WOS研究方向	Construction & Building Technology ; Engineering
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/313894
作者单位	1.Changan Univ, Sch Highway, Middle Sect Nan Erhuan Rd, Xian 710064, Shannxi, Peoples R China; 2.Luoyang Rail Transit Grp Co Ltd, 256 Kaiyuan Rd, Luoyang 471023, Henan, Peoples R China
推荐引用方式 GB/T 7714	Liu, Feifei,Mao, Xuesong,Xu, Cheng,et al. Covering Effects under Diurnal Temperature Variations in Arid and Semiarid Areas[J],2020,2020.
APA	Liu, Feifei,Mao, Xuesong,Xu, Cheng,Li, Yingying,Wu, Qian,&Zhang, Jianxun.(2020).Covering Effects under Diurnal Temperature Variations in Arid and Semiarid Areas.ADVANCES IN CIVIL ENGINEERING,2020.
MLA	Liu, Feifei,et al."Covering Effects under Diurnal Temperature Variations in Arid and Semiarid Areas".ADVANCES IN CIVIL ENGINEERING 2020(2020).