Multiscale characteristics of the wetting deformation of Malan loess in the Yan'an area, China

CORC > 成都山地灾害与环境研究所 > 中国科学院水利部成都山地灾害与环境研究所 > Journal of Mountain Science > Journal of Mountain Science-2021 > Vol18 No.4

	Multiscale characteristics of the wetting deformation of Malan loess in the Yan'an area, China
	Nan Jing-jing; Peng Jian-bing; Zhu Feng-ji; Zhao Jun-yan; Leng Yan-qiu
刊名	JOURNAL OF MOUNTAIN SCIENCE
	2021
卷号	18 期号:4 页码:1112-1130
关键词	Loess Macroscopic wetting deformation Wetting collapse mechanism Microstructure Pore change
ISSN号	1672-6316
英文摘要	Loess is prone to collapse upon wetting due to its open metastable structure, which poses a considerable threat to the environment, construction processes and human life. In this study, double oedometer tests and scanning electron microscopy and mercury intrusion porosimetry analyses were conducted on loess from Yan'an to study the macroscopic and microscopic characteristics of loess wetting deformation and the underlying mechanism. The wetting collapse of loess under loading depends on the changes in different microstructure levels and elements. This collapse chain reaction is manifested by the dissipation, scattering and recombination of the cementation, deformation and reorganization of the particles, blocking of the pore channels, decrease in the dominant size and volume of unstable macropores (>14 mu m) and abundant mesopores (2.5-14 mu m), increase in the volume of small pores (0.05-2.5 mu m), and volume contraction at the macroscale. This process is dependent on the initial water content, stress level and wetting degree. These findings can facilitate collapsible loess hazard prevention and geological engineering construction.
语种	英语
内容类型	期刊论文
源URL	[http://ir.imde.ac.cn/handle/131551/57327]
专题	Journal of Mountain Science_Journal of Mountain Science-2021_Vol18 No.4
推荐引用方式 GB/T 7714	Nan Jing-jing,Peng Jian-bing,Zhu Feng-ji,et al. Multiscale characteristics of the wetting deformation of Malan loess in the Yan'an area, China[J]. JOURNAL OF MOUNTAIN SCIENCE,2021,18(4):1112-1130.
APA	Nan Jing-jing,Peng Jian-bing,Zhu Feng-ji,Zhao Jun-yan,&Leng Yan-qiu.(2021).Multiscale characteristics of the wetting deformation of Malan loess in the Yan'an area, China.JOURNAL OF MOUNTAIN SCIENCE,18(4),1112-1130.
MLA	Nan Jing-jing,et al."Multiscale characteristics of the wetting deformation of Malan loess in the Yan'an area, China".JOURNAL OF MOUNTAIN SCIENCE 18.4(2021):1112-1130.