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Estimating the maximum impact force of dry granular flow based on pileup characteristics
Xiao Si-you1,2; Su Li-jun1,2,3; Jiang Yuan-jun1,2; Mehtab Alam1,2; Li Cheng1,2,3; Liu Dao-chuan1,2,4
2019
Source PublicationJOURNAL OF MOUNTAIN SCIENCE
ISSN1672-6316
EISSN1993-0321
Volume16Issue:10Pages:2435-2452
SubtypeArticle
Contribution Rank1
AbstractThe maximum normal impact resultant force (NIRF) is usually regarded as the sum of the static earth pressure of the dead zone and the dynamic impact pressure of the flowing layer. The influence of the interaction between the flowing layer and dead zone on the impact force is ignored. In this study, we classified two impact models with respect to the pileup characteristics of the dead zone. Then, we employed the discrete element method to investigate the influences of the pileup characteristics on the impact force of dry granular flow on a tilted rigid wall. If the final pileup height is equal to the critical value, the maximum NIRF can be estimated using a hydrostatic model, because the main contribution to the maximum NIRF is the static earth pressure of the dead zone. If the final pileup height is less than the critical value, however, the particles in the dead zone are squeezed along the slope surface by the impact of the flowing layer on the dead zone, and because of shear effects, the flowing layer causes an entrainment in the dead zone. This results in a decrease in the volume of the dead zone at the moment of maximum NIRF with increases in the slope angle. As such, the maximum NIRF mainly comprises the instant impact force of the flowing layer, so hydro-dynamic models are effective for estimating the maximum NIRF. Impact models will benefit from further study of the components and distribution of the impact force of dry granular flow.
KeywordDry granular flow Tilted retaining wall Impact force Discrete element method Pileup height
DOI10.1007/s11629-019-5428-5
Indexed BySCI
Language英语
WOS IDWOS:000489956000017
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/31301
Collection山地灾害与地表过程重点实验室
Corresponding AuthorJiang Yuan-jun
Affiliation1.Chinese Acad Sci, Key Lab Mt Hazards & Earth Surface Proc, Chengdu 610041, Sichuan, Peoples R China;
2.Chinese Acad Sci, Inst Mt Hazards & Environm, Chengdu 610041, Sichuan, Peoples R China;
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China;
4.CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100101, Peoples R China;
5.Res Inst Ltd, Sichuan Highway Planning, Design, Chengdu 610041, Sichuan, Peoples R China
First Author Affilication中国科学院水利部成都山地灾害与环境研究所
Corresponding Author Affilication中国科学院水利部成都山地灾害与环境研究所
Recommended Citation
GB/T 7714
Xiao Si-you,Su Li-jun,Jiang Yuan-jun,et al. Estimating the maximum impact force of dry granular flow based on pileup characteristics[J]. JOURNAL OF MOUNTAIN SCIENCE,2019,16(10):2435-2452.
APA Xiao Si-you,Su Li-jun,Jiang Yuan-jun,Mehtab Alam,Li Cheng,&Liu Dao-chuan.(2019).Estimating the maximum impact force of dry granular flow based on pileup characteristics.JOURNAL OF MOUNTAIN SCIENCE,16(10),2435-2452.
MLA Xiao Si-you,et al."Estimating the maximum impact force of dry granular flow based on pileup characteristics".JOURNAL OF MOUNTAIN SCIENCE 16.10(2019):2435-2452.
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