气候变化领域集成服务门户(CCPortal): Effect of freeze-thaw cycles on the deformation behavior of gravelly soil in the 300 m-high earth core rockfill dam

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DOI	10.1007/s12665-021-09608-4
	Effect of freeze-thaw cycles on the deformation behavior of gravelly soil in the 300 m-high earth core rockfill dam
	Ming, Feng; Ren, Xiu-Ling; Wang, Jin-guo; Zhou, Zhi-wei; Liu, En-Long; Yu, Qi-hao
通讯作者	Ming, F ; Yu, QH (通讯作者)，Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Frozen Soil Engn, Lanzhou 730000, Peoples R China.
发表日期	2021
ISSN	1866-6280
EISSN	1866-6299
卷号	80 期号:8
英文摘要	Many high earth rockfill dams are currently being constructed in the alpine region of Southwest China. Since the effective working time is reduced by the cold climate, it is necessary to solve the problem of intermittent filling of the core wall at low temperature. However, freeze-thaw (FT) cycles in the filling process will change the deformation behavior of gravelly soil. For 300 m-high earth core rockfill dams, the deformation of gravelly soil is a crucial factor in predicting the long-term deformation and settlement after dam construction. To investigate the influence of FT cycles on the deformation characteristics, the deformation of the gravelly soil under different amounts of FT cycles was tested using an MTS-810 test system. The deformation characteristics were discussed, and a modified Burgers model was used to describe the deformation characteristics. The results show that the freeze-thaw action makes the coarse particles break, resulting in an increase in the fine content. The FT cycles can make the creep characteristics of gravelly soil more obvious. The creep strain has a large contribution to the total strain with the increasing in the FT cycles. It is thus suggested that the coverage of thermal insulation material would effectively prevent freezing of the gravelly soil and control the deformation.
关键词	SHEAR-STRENGTH CLAY
英文关键词	Gravelly soil; Deformation characteristics; Freeze– thaw cycles; Particle breakage
语种	英语
WOS研究方向	Environmental Sciences & Ecology ; Geology ; Water Resources
WOS类目	Environmental Sciences ; Geosciences, Multidisciplinary ; Water Resources
WOS记录号	WOS:000636745600002
来源期刊	ENVIRONMENTAL EARTH SCIENCES
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/254444
作者单位	[Ming, Feng; Ren, Xiu-Ling; Zhou, Zhi-wei; Liu, En-Long; Yu, Qi-hao] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Frozen Soil Engn, Lanzhou 730000, Peoples R China; [Ren, Xiu-Ling] Univ Chinese Acad Sci, Beijing 100049, Peoples R China; [Wang, Jin-guo] Yalong River Hydropower Dev Co, Chengdu 610051, Peoples R China; [Liu, En-Long] Sichuan Univ, Coll Water Resources & Hydropower, Chengdu 610065, Sichuan, Peoples R China
推荐引用方式 GB/T 7714	Ming, Feng,Ren, Xiu-Ling,Wang, Jin-guo,et al. Effect of freeze-thaw cycles on the deformation behavior of gravelly soil in the 300 m-high earth core rockfill dam[J]. 中国科学院西北生态环境资源研究院,2021,80(8).
APA	Ming, Feng,Ren, Xiu-Ling,Wang, Jin-guo,Zhou, Zhi-wei,Liu, En-Long,&Yu, Qi-hao.(2021).Effect of freeze-thaw cycles on the deformation behavior of gravelly soil in the 300 m-high earth core rockfill dam.ENVIRONMENTAL EARTH SCIENCES,80(8).
MLA	Ming, Feng,et al."Effect of freeze-thaw cycles on the deformation behavior of gravelly soil in the 300 m-high earth core rockfill dam".ENVIRONMENTAL EARTH SCIENCES 80.8(2021).