气候变化领域集成服务门户(CCPortal): Stability behavior of a reservoir soil bank slope under freeze-thaw cycles in cold regions

CCPortal

DOI	10.1016/j.coldregions.2020.103181
	Stability behavior of a reservoir soil bank slope under freeze-thaw cycles in cold regions
	Qin, Zipeng; Lai, Yuanming; Tian, Yan; Zhang, Mingyi
发表日期	2021
ISSN	0165-232X
EISSN	1872-7441
卷号	181
英文摘要	The instability of irrigation reservoir bank slopes in cold regions has seriously affected the benign development of irrigation areas and agricultural production in recent years. To predict and evaluate the slope failure caused by freeze-thaw cycles, a two-dimensional numerical model of thermo-hydro-mechanical multi physical fields of a reservoir soil bank slope is established based on field investigations, laboratory tests and prototype observations. The relationship between the sliding surface temperature and the soil mechanical parameters is proposed by a secondary development program. The generation of the cracks on the bank slope top is explained from the viewpoint of temperature. The hydrothermal changing process of the bank slope under the external temperature is analyzed and compared with the measured data. The long-term degradation process of the soil bank slope under freeze-thaw cycles is studied, and the evolution law of its safety factors with the hydrothermal variation at the sliding surface is quantitatively revealed. The results show that the freeze-thaw cycles have an obvious accelerating effect on the soil bank slope instability, and the safety factor is decreased by 10.43% after 5 freeze thaw cycles, which directly leads to the bank slope failure
英文关键词	Safety factor; Moisture migration; Thermal convection coupling; Freeze-thaw cycle; Soil bank slope; Cold region
语种	英语
WOS研究方向	Engineering ; Geology
WOS类目	Engineering, Environmental ; Engineering, Civil ; Geosciences, Multidisciplinary
WOS关键词	CLIMATE-CHANGE ; MASS MOVEMENTS ; LOESS ; RAINFALL ; IMPACT ; ZONE ; MECHANISM ; EROSION ; RIVER ; DAM
WOS记录号	WOS:000594835100004
来源期刊	COLD REGIONS SCIENCE AND TECHNOLOGY
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/239558
作者单位	[Qin, Zipeng; Lai, Yuanming; Zhang, Mingyi] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Frozen Soil Engn, Lanzhou 730000, Peoples R China; [Qin, Zipeng; Lai, Yuanming; Zhang, Mingyi] Univ Chinese Acad Sci, Beijing 100049, Peoples R China; [Tian, Yan] Lanzhou Univ, Coll Civil Engn & Mech, Lanzhou 730000, Peoples R China
推荐引用方式 GB/T 7714	Qin, Zipeng,Lai, Yuanming,Tian, Yan,et al. Stability behavior of a reservoir soil bank slope under freeze-thaw cycles in cold regions[J],2021,181.
APA	Qin, Zipeng,Lai, Yuanming,Tian, Yan,&Zhang, Mingyi.(2021).Stability behavior of a reservoir soil bank slope under freeze-thaw cycles in cold regions.COLD REGIONS SCIENCE AND TECHNOLOGY,181.
MLA	Qin, Zipeng,et al."Stability behavior of a reservoir soil bank slope under freeze-thaw cycles in cold regions".COLD REGIONS SCIENCE AND TECHNOLOGY 181(2021).