气候变化领域集成服务门户(CCPortal): Effect of freeze-thaw cycle on hydraulic conductivity of compacted clayey soil

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DOI	10.1007/s11629-021-6683-9
	Effect of freeze-thaw cycle on hydraulic conductivity of compacted clayey soil
	Guo Lei; Yu Qi-hao; Yin Na; Zhang Dong-ming; Zhang Deng-ping; Ren Xiu-ling; You Yan-hui; Zhang Zhen-yu; Bing Hui; Chen Shi-jie
通讯作者	Yu, QH (通讯作者)，Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Frozen Soil Engn, Lanzhou 730000, Peoples R China. ; Yu, QH (通讯作者)，Chinese Acad Sci, Northwest Inst Ecoenvironm & Resource, Beiluihe Observat Stn Frozen Soil Environm & Engn, Lanzhou 730000, Peoples R China. ; Yin, N (通讯作者)，Gansu City Real Estate Dev CO Ltd, Lanzhou 730000, Peoples R China.
发表日期	2022
ISSN	1672-6316
EISSN	1993-0321
起始页码	606
结束页码	614
卷号	19 期号:2
英文摘要	When filling embankment dams in cold regions, engineers must solve two freeze-thaw cycle (FTC)-induced soil problems. First, compacted soil constituting the dam is subjected to the FTC during dam construction. Second, loose soil material (LSM), which is subjected to the FTC, fills the dam. To investigate the effects of the aforementioned two problems on the hydraulic conductivity of compacted clayey soil, a series of permeation tests on clayey soil compacted before and after FTC were conducted in this study. The results showed that for the first problem, the hydraulic conductivity of compacted clayey soil subjected to one FTC significantly increases by two to three orders of magnitude because FTC-induced cracks can cause preferential flow in the permeation process. For the second problem, when the FTC number is less than a critical number, the FTC of the LSM may result in the development of united soil particles, thereby increasing the effective porosity ratio and hydraulic conductivity of the compacted soil. It was discovered that the hydraulic conductivity of compacted soil can increase by one to three times when the LSM is subjected to 10 FTCs. When the FTC number exceeds a critical number, the effective porosity ratio and hydraulic conductivity of the compacted soil may decrease with the FTC of the LSM. This should be investigated in future studies, and the results can be used to improve engineering management processes when filling embankment dams during winter in cold regions.
关键词	LINERS
英文关键词	Permeability; Freeze-thaw cycles (FTCs); Effective porosity ratio; Embankment dam; Cold region
语种	英语
WOS研究方向	Environmental Sciences & Ecology
WOS类目	Environmental Sciences
WOS记录号	WOS:000752387900020
来源期刊	JOURNAL OF MOUNTAIN SCIENCE
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/253851
作者单位	[Guo Lei; Yu Qi-hao; Ren Xiu-ling; You Yan-hui; Zhang Zhen-yu; Bing Hui; Chen Shi-jie] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Frozen Soil Engn, Lanzhou 730000, Peoples R China; [Yu Qi-hao] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resource, Beiluihe Observat Stn Frozen Soil Environm & Engn, Lanzhou 730000, Peoples R China; [Yin Na] Gansu City Real Estate Dev CO Ltd, Lanzhou 730000, Peoples R China; [Zhang Dong-ming; Zhang Deng-ping] Yalong River Hydropower Dev Co Ltd, Chengdu 610051, Peoples R China
推荐引用方式 GB/T 7714	Guo Lei,Yu Qi-hao,Yin Na,et al. Effect of freeze-thaw cycle on hydraulic conductivity of compacted clayey soil[J]. 中国科学院西北生态环境资源研究院,2022,19(2).
APA	Guo Lei.,Yu Qi-hao.,Yin Na.,Zhang Dong-ming.,Zhang Deng-ping.,...&Chen Shi-jie.(2022).Effect of freeze-thaw cycle on hydraulic conductivity of compacted clayey soil.JOURNAL OF MOUNTAIN SCIENCE,19(2).
MLA	Guo Lei,et al."Effect of freeze-thaw cycle on hydraulic conductivity of compacted clayey soil".JOURNAL OF MOUNTAIN SCIENCE 19.2(2022).