DOI: 10.1007/s11069-021-04741-6
论文题名: Influence of particle size on the buffering efficiency of soil cushion layer against rockfall impact
作者: Shen W. ; Zhao T. ; Dai F.
刊名: Natural Hazards
ISSN: 0921030X
出版年: 2021
卷: 108, 期: 2 起始页码: 1469
结束页码: 1488
语种: 英语
中文关键词: Discrete element method
; Impact force
; Particle size
; Rockfall
; Soil cushion layer
英文关键词: debris flow
; discrete element method
; experiment
; impact
; particle size
; rockfall
; soil
英文摘要: Soil cushion layers are commonly paved in front of protection structures to avoid the direct impact of rockfall and debris flow. This study is devoted to investigating the influence of particles size on the buffering efficiency of a soil cushion layer by experimental and numerical tests. A series of experimental tests are performed by releasing a spherical granite rock block from different heights to impact onto a soil cushion layer consisting of uniformly graded particles. The influence of particle grading on the buffering efficiency is then analyzed in a set of parametric studies. The impact force of rock block and the interacting force at the interface between the soil layer and the protection structure are monitored and evaluated. The discrete element method is utilized to explore the cratering process of rock block, together with the force chains and energy evolutions in the soil cushion layer. The results indicate that soil particles size can influence significantly on the impact force, especially for high-velocity impacts. This effect can be explained by the number and the stability of force chains formed in the granular packing. These findings can provide some insights to designing effective soil cushion layers for protection structures. © 2021, The Author(s), under exclusive licence to Springer Nature B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/169360
Appears in Collections: 气候变化与战略
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作者单位: Faculty of Geosciences and Environmental Engineering, Southwest Jiaotong University, Chengdu, 611756, China; Department of Civil and Environmental Engineering, Brunel University London, London, UB8 3PH, United Kingdom; State Key Laboratory of Hydraulics and Mountain River Engineering, College of Water Resource and Hydropower, Sichuan University, Chengdu, 610065, China
Recommended Citation:
Shen W.,Zhao T.,Dai F.. Influence of particle size on the buffering efficiency of soil cushion layer against rockfall impact[J]. Natural Hazards,2021-01-01,108(2)