气候变化领域集成服务门户(CCPortal): Characteristics and mechanism of the landslide in Yongguang village, Minxian County, China

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DOI	10.1007/s11069-020-04360-7
	Characteristics and mechanism of the landslide in Yongguang village, Minxian County, China
	Wang Q.; Wang Z.; Su Y.; Zhong X.; Wang L.; Ma H.; Zhang G.; Woolery E.E.; Liu K.
发表日期	2021
ISSN	0921030X
起始页码	1413
结束页码	1438
卷号	105 期号:2
英文摘要	More than 2330 landslides/mudflows in loess were triggered by the 2013 Minxian earthquake (MS 6.6) in its epicentral area in Minxian County, Gansu, China. A comprehensive investigation, including in-situ and laboratory tests, was conducted for the largest landslide/mudflow in Yongguang village in order to gain a better understanding of the mechanism and rainfall impact on the landslides/mudflows. A series of triaxial laboratory tests showed that the strength of loess is significantly reduced with increased water content. The static and dynamic parameters of loess, obtained from in-situ and laboratory tests, were used to analyze ground-motion site response. The field observations and site-response analyses suggested that peak ground accelerations generated by the Minxian earthquake were in the range of 0.2–0.4 g in the epicentral area. The static and dynamic parameters of loess were also used to analyze dynamic slope stability and liquefaction potential. The results showed that loess slopes would not fail or liquefy under dry conditions and ground motions with PGA of 0.2–0.4 g, whereas loess slopes would fail or liquefy under saturated conditions. Although difficult to quantify, the water content of the loess was significantly increased, even to the point of being partially saturated, by abnormally high rainfall prior to the earthquake. Thus, the abnormal rainfall before the earthquake was a contributing factor for the massive loess landslides/mudflows in the epicentral area. © 2020, Springer Nature B.V.
关键词	Dynamic slope stability Ground motion Liquefaction Loess landslide/mudflow Site effect
英文关键词	dynamic analysis; ground motion; landslide; liquefaction; mudflow; precipitation intensity; site effect; slope stability; China; Gansu
语种	英语
来源期刊	Natural Hazards
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/206647
作者单位	Key Laboratory of Loess Earthquake Engineering, China Earthquake Administration and Gansu Province, Lanzhou, 730000, China; Kentucky Geological Survey, University of Kentucky, Lexington, KY 40506, United States; Key Laboratory of Mechanics On Disaster and Environment in Western China, Ministry of Education of China, Lanzhou University, Lanzhou, 730000, China; Lanzhou Institute of Seismology, CEA, Lanzhou, 730000, China; Geological Hazard Research Institute, Gansu Academy of Sciences, Lanzhou, 730000, China; Department of Earth and Environmental Sciences, University of Kentucky, Lexington, KY 40506, United States
推荐引用方式 GB/T 7714	Wang Q.,Wang Z.,Su Y.,et al. Characteristics and mechanism of the landslide in Yongguang village, Minxian County, China[J],2021,105(2).
APA	Wang Q..,Wang Z..,Su Y..,Zhong X..,Wang L..,...&Liu K..(2021).Characteristics and mechanism of the landslide in Yongguang village, Minxian County, China.Natural Hazards,105(2).
MLA	Wang Q.,et al."Characteristics and mechanism of the landslide in Yongguang village, Minxian County, China".Natural Hazards 105.2(2021).