干旱区生态环境知识资源中心(Arid): Disintegration characteristics of sodic-saline loessial soil after freeze-thaw and wet-dry cycles

Arid

DOI	10.1002/esp.5826
	Disintegration characteristics of sodic-saline loessial soil after freeze-thaw and wet-dry cycles
	Kong, Fansheng; Xu, Yan; Hu, Zhongjun; Du, Hua; Zhang, Jinsheng; Zhang, Zheyuan; Hao, Wei
通讯作者	Xu, Y
来源期刊	EARTH SURFACE PROCESSES AND LANDFORMS
ISSN	0197-9337
EISSN	1096-9837
出版年	2024
卷号	49 期号:7 页码:2229-2244
英文摘要	Geological hazards such as gully erosion, collapse and slope failure occur frequently in loess areas, which are closely related to the soil disintegration characteristics. Understanding the impact of freeze-thaw and wet-dry action on soil disintegration in the context of climate change is essential to establish effective soil and water conservation strategies and prevent engineering geological hazards in loess areas. In this study, sodic-saline loessial soils with different clay content were subjected to freeze-thaw and wet-dry cycles, followed by aggregate durability tests, direct shear tests and disintegration tests to investigate the effects of the two natural processes on soil disintegration characteristics. The results showed that the samples subjected to freeze-thaw cycles primarily exhibited rapid and stable disintegration, followed by slow disintegration, whereas the samples subjected to wet-dry cycles revealed weight gain, continuous slow disintegration and eventual sudden disintegration. Freeze-thaw action continuously deteriorated the disintegration resistance of soil, while wet-dry action improved the disintegration resistance of soil after the first cycle, and gradually weakened it in subsequent cycles. Statistical analysis showed that, for samples undergoing freeze-thaw cycles, the number of cycles and clay content were positively correlated with the disintegration rate, while the aggregate durability was negatively correlated with the disintegration rate. For samples undergoing wet-dry cycles, the number of cycles had a positive effect on the disintegration rate, while the clay content, shear strength and cohesion had a negative correlation with the disintegration rate. At a certain clay content, there was a positive correlation observed between the surface crack ratio, crack length and width with the disintegration rate of the wet-dry samples, while shear strength and cohesion had a negative correlation with the disintegration rate of both freeze-thaw and wet-dry samples. Furthermore, the study outlined the disintegration mechanism of loessial soils based on internal factors, driving factors, resistance factors and evolutionary factors. This study contributes to the in-depth understanding of the catastrophic mechanism of geological hazards in cold and arid areas and provides experimental evidence for its control and management. The study outlined the disintegration mechanism of loessial soils based on internal factors, driving factors, resistance factors and evolutionary factors. image
英文关键词	aggregate stability clay content freeze-thaw cycles sodic-saline loessial soil soil disintegration wet-dry cycles
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:001187114700001
WOS关键词	MECHANICAL-PROPERTIES ; AGGREGATE STABILITY ; STRENGTH ; EROSION
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary
WOS研究方向	Physical Geography ; Geology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/403320
推荐引用方式 GB/T 7714	Kong, Fansheng,Xu, Yan,Hu, Zhongjun,et al. Disintegration characteristics of sodic-saline loessial soil after freeze-thaw and wet-dry cycles[J],2024,49(7):2229-2244.
APA	Kong, Fansheng.,Xu, Yan.,Hu, Zhongjun.,Du, Hua.,Zhang, Jinsheng.,...&Hao, Wei.(2024).Disintegration characteristics of sodic-saline loessial soil after freeze-thaw and wet-dry cycles.EARTH SURFACE PROCESSES AND LANDFORMS,49(7),2229-2244.
MLA	Kong, Fansheng,et al."Disintegration characteristics of sodic-saline loessial soil after freeze-thaw and wet-dry cycles".EARTH SURFACE PROCESSES AND LANDFORMS 49.7(2024):2229-2244.