Mechanism of colluvial landslide induction by rainfall and slope construction: A case study

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-2021 > Vol18 No.4

	Mechanism of colluvial landslide induction by rainfall and slope construction: A case study
	Zhou Zhou; Shen Jun-hui; Li Ying; Duan Wei-feng; Yang Ri-chang; Shu Jun-cheng; Li He-wei; Tao Sheng-yu; Zheng Sheng-zhe
刊名	JOURNAL OF MOUNTAIN SCIENCE
	2021
卷号	18 期号:4 页码:1013-1033
关键词	Colluvial landslide Slope construction Rainfall Induction mechanism Weakening pattern Geomechanical model
ISSN号	1672-6316
英文摘要	The landslide hazards occurring in the complex geological genesis accumulation body are usually controlled by the coupling action of many internal and external factors. Therefore, this paper takes the dam-front Danbo accumulation body landslide of Yangfanggou hydropower station on the Yalong River as the geological prototype, and discusses the process and mechanism of slope stability degradation under the combined action of rainfall and slope construction. Based on the detailed understanding of the basic characteristics of the accumulation body, the development characteristics of the landslide and the construction situation of the slope engineering, the study conducted correlation analysis between rainfall and landslide displacement, the physical and mechanical tests of all types of rock-soil masses, and the numerical simulation testing of seepage field variation of the landslide section. It is found that the special slope structure and material composition of the old landslide accumulation layer on the upper part of the Danbo accumulation body are the internal factors for the occurrence of thrust load-induced landslide, and the construction of the slope engineering not only creates free space conditions for sliding, but also provides channels for the infiltration of rainfall into the slope after confluence, which is an external factor that caused the mechanical properties of the sliding zone soil to gradually weaken from the trailing edge to the leading edge. The geomechanical model of such landslide is that the active section of the trailing edge produces the source of force, the transition section of the middle section affects the occurrence of sliding, and the anti-sliding section of the leading edge controls the occurrence of landslide hazards. The results of this research provide not only a useful supplement to the theory of landslide formation mechanisms but also a scientific basis for guiding the prevention and control of similar hazards.
语种	英语
内容类型	期刊论文
源URL	[http://ir.imde.ac.cn/handle/131551/57322]
专题	Journal of Mountain Science_Journal of Mountain Science-2021_Vol18 No.4
推荐引用方式 GB/T 7714	Zhou Zhou,Shen Jun-hui,Li Ying,et al. Mechanism of colluvial landslide induction by rainfall and slope construction: A case study[J]. JOURNAL OF MOUNTAIN SCIENCE,2021,18(4):1013-1033.
APA	Zhou Zhou.,Shen Jun-hui.,Li Ying.,Duan Wei-feng.,Yang Ri-chang.,...&Zheng Sheng-zhe.(2021).Mechanism of colluvial landslide induction by rainfall and slope construction: A case study.JOURNAL OF MOUNTAIN SCIENCE,18(4),1013-1033.
MLA	Zhou Zhou,et al."Mechanism of colluvial landslide induction by rainfall and slope construction: A case study".JOURNAL OF MOUNTAIN SCIENCE 18.4(2021):1013-1033.