Characteristics of grain size distribution and the shear strength analysis of Chenjiaba long runout coseismic landslide

doi:10.1007/s11629-019-5535-3

CORC > 成都山地灾害与环境研究所 > 中国科学院水利部成都山地灾害与环境研究所 > Journal of Mountain Science > Journal of Mountain Science-2019 > Vol16 No.9

	Characteristics of grain size distribution and the shear strength analysis of Chenjiaba long runout coseismic landslide
	Getahun, Ephrem; Qi Sheng-wen; Guo Song-feng; Zou Yu; Liang Ning
刊名	JOURNAL OF MOUNTAIN SCIENCE
	2019
卷号	16 期号:9 页码:2110-2125
关键词	Grain size distribution Long runout Landslide Multistage-Multiphase Ring Shear
ISSN号	1672-6316
DOI	10.1007/s11629-019-5535-3
文献子类	Article
英文摘要	Study on the grain size distribution characteristics and the frictional strength behavior of the slide deposits are helpful to disclose the landslide runout process and understand the mechanism of a long runout landslide. We performed grain size distribution analysis on samples collected from Chenjiaba landslide induced by Wenchuan earthquake. The grain size distribution of samples from the landslide sections quantitatively depicts a gradual coarsening upward grading from shear zone to the top section. Then a multistage - multiphase ring shearing approach was used to determine a comparative shear strength behavior of samples from each landslide section. In this method, a sample was sheared continuously for large displacement and fast rate on different normal stress conditions. The multiphase shear mode with a maximum of 105 mm/min rate has allowed observing the qualitative change and patterns of the frictional resistance behaviors of soils under different normal stresses. The results of coefficient of friction values under multiphase shear mode have shown substantial post peak shear weakening behaviors after large shear displacement that can be narrated with long runout processes. The shear strength test results indicate that the shear zone samples have developed higher friction angle values compared to overlying section samples, on the last phase of shear process, which may be very important to understand the braking mechanism of a long runout landslide.
电子版国际标准刊号	1993-0321
语种	英语
WOS记录号	WOS:000485301000010
内容类型	期刊论文
源URL	[http://ir.imde.ac.cn/handle/131551/46576]
专题	Journal of Mountain Science_Journal of Mountain Science-2019_Vol16 No.9
推荐引用方式 GB/T 7714	Getahun, Ephrem,Qi Sheng-wen,Guo Song-feng,et al. Characteristics of grain size distribution and the shear strength analysis of Chenjiaba long runout coseismic landslide[J]. JOURNAL OF MOUNTAIN SCIENCE,2019,16(9):2110-2125.
APA	Getahun, Ephrem,Qi Sheng-wen,Guo Song-feng,Zou Yu,&Liang Ning.(2019).Characteristics of grain size distribution and the shear strength analysis of Chenjiaba long runout coseismic landslide.JOURNAL OF MOUNTAIN SCIENCE,16(9),2110-2125.
MLA	Getahun, Ephrem,et al."Characteristics of grain size distribution and the shear strength analysis of Chenjiaba long runout coseismic landslide".JOURNAL OF MOUNTAIN SCIENCE 16.9(2019):2110-2125.