DOI: 10.1007/s11069-020-04333-w
论文题名: Numerical investigation of the recent Chenhecun landslide (Gansu, China) using the discrete element method
作者: Chen Z. ; Song D.
刊名: Natural Hazards
ISSN: 0921030X
出版年: 2021
卷: 105, 期: 1 起始页码: 717
结束页码: 733
语种: 英语
中文关键词: Baxie river basin
; Chenhecun landslide
; China
; Discrete element method
; MatDEM
英文关键词: discrete element method
; dynamic analysis
; energy dissipation
; field survey
; kinetic energy
; landslide
; river basin
; sliding
; China
; Gansu
英文摘要: Loess–mudstone landslides are widely distributed in Northwest China. However, the deformation features and kinematic processes of these landslides are still not well understood. The Chenhecun landslide occurred on June 10, 2016, near Chenhe village, Dongxiang County, China. Based on detailed field surveys, Google Earth images, and borehole investigations, a geological profile of the landslide was constructed. Using the two-dimensional discrete element software MatDEM, this work analyses the deformation behaviours and kinetic characteristics of the landslide. In the dynamic analysis, the landslide failure process, velocity, displacement, heat generation, and energy conversion are taken into account. During the whole simulated landslide process, the sliding mass at the rear and bottom edges exhibits lower mobility than at the front and upper edges. The kinetic energy of the landslide dominates in the acceleration stage, and friction is the main source of energy dissipation during the entirety of the landslide movement. A band-like high-heat zone is formed near the sliding belt, and this zone expands forward with sliding. The gravitational potential energy is mainly converted into heat, kinetic energy, and elastic potential energy. In addition, the simulated geometry and accumulation characteristics from the MatDEM are in good agreement with the topographic features of the landslide. This work could provide an important reference for understanding the motion of similar geological hazards in the area. © 2020, Springer Nature B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/168956
Appears in Collections: 气候变化与战略
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作者单位: State Key Laboratory of Hydraulic and Mountain River Engineering, College of Water Resource and Hydropower, Sichuan University, Chengdu, 610065, China; Department of Hydraulic Engineering, State Key Laboratory of Hydroscience and Engineering, Tsinghua University, Beijing, 100084, China
Recommended Citation:
Chen Z.,Song D.. Numerical investigation of the recent Chenhecun landslide (Gansu, China) using the discrete element method[J]. Natural Hazards,2021-01-01,105(1)