Analysis of landslide stability under seismic action and subsequent rainfall: a case study on the Ganjiazhai giant landslide along the Zhaotong-Qiaojia road during the 2014 Ludian earthquake, Yunnan, China

doi:10.1007/s10064-020-01890-z

	Analysis of landslide stability under seismic action and subsequent rainfall: a case study on the Ganjiazhai giant landslide along the Zhaotong-Qiaojia road during the 2014 Ludian earthquake, Yunnan, China
	Fu, Xiaodong 1,2; Sheng, Qian 1,2; Li, Guo 3; Zhang, Zhenping 1,2; Zhou, Yongqiang 1,2; Du, Yuxiang 1,2
刊名	BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT
	2020-07-04
页码	20
关键词	Landslide Strong earthquake Subsequent rainfall Dynamic stability Failure process
ISSN号	1435-9529
DOI	10.1007/s10064-020-01890-z
英文摘要	In a strong earthquake, not only a large number of coseismic landslides are triggered, but relaxation and cracks in the rocks and soils are induced, which make these rocks and soils vulnerable to instability during subsequent rainfall; thus, strong earthquakes always have long-term effects on landslides. The geo-hazards along the Zhaotong-Qiaojia road in the 2014 Ludian earthquake (Ms 6.5) of Yunnan Province, China, were investigated, and the Ganjiazhai giant landslide was chosen as a case study. First, using the limit equilibrium analysis and Newmark method, the critical seismic intensity of the landslide before the earthquake was evaluated. Secondly, the dynamic failure process of the landslide under the measured ground motion was simulated with the discontinuous deformation analysis method. Lastly, based on stress-seepage coupling analysis and precipitation data from Ludian meteorological station, the stability of the landslide during subsequent rainfall after the earthquake was predicted. The results show that the critical seismic intensity was within degrees VIII-IX, which is consistent with the results of the earthquake damage investigation. The dynamic failure process can be divided into four stages, and four scarps formed; the potential sliding zones during the subsequent rainfall were at the first scarp and the fourth scarp, and their critical rainfall amounts were 35-40 mm and 55-60 mm, respectively. In this paper, failure process simulation and stability prediction of the landslide before, during, and after the strong earthquake are presented, which provide analysis methods for the dynamic stability of landslides in the meizoseismal area.
资助项目	National Natural Science Foundation of China[51779250] ; National Key R&D Program of China[2018YFC0809400] ; International Partnership Program of Chinese Academy of Sciences[131551KYSB20180042] ; Traffic Science, Technology and Education Project of Yunnan Province [2017][33]
WOS研究方向	Engineering ; Geology
语种	英语
出版者	SPRINGER HEIDELBERG
WOS记录号	WOS:000545287000001
内容类型	期刊论文
源URL	[http://119.78.100.198/handle/2S6PX9GI/24522]
专题	中科院武汉岩土力学所
通讯作者	Fu, Xiaodong
作者单位	1.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China 2.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China 3.Broadvis Engn Consultants, Natl Engn Lab Surface Transportat Weather Impact, Kunming 650041, Yunnan, Peoples R China
推荐引用方式 GB/T 7714	Fu, Xiaodong,Sheng, Qian,Li, Guo,et al. Analysis of landslide stability under seismic action and subsequent rainfall: a case study on the Ganjiazhai giant landslide along the Zhaotong-Qiaojia road during the 2014 Ludian earthquake, Yunnan, China[J]. BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT,2020:20.
APA	Fu, Xiaodong,Sheng, Qian,Li, Guo,Zhang, Zhenping,Zhou, Yongqiang,&Du, Yuxiang.(2020).Analysis of landslide stability under seismic action and subsequent rainfall: a case study on the Ganjiazhai giant landslide along the Zhaotong-Qiaojia road during the 2014 Ludian earthquake, Yunnan, China.BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT,20.
MLA	Fu, Xiaodong,et al."Analysis of landslide stability under seismic action and subsequent rainfall: a case study on the Ganjiazhai giant landslide along the Zhaotong-Qiaojia road during the 2014 Ludian earthquake, Yunnan, China".BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT (2020):20.