The influence of the slit size and spacing on the impact dynamics of dry granular flows on slit dams
文献类型：期刊论文
| 作者 | Li, Nanjun4,5; Zhou, Gordon G. D.3,4,5 ; Cui, Kahlil F. E.4,5; Kong, Yong2; Huang, Yu1
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| 刊名 | GEOTECHNIQUE
 |
| 出版日期 | 2024-12-17 |
| 页码 | 38 |
| 关键词 | granular flow slit dam impact force pressure distribution geohazard mitigation numerical modelling |
| ISSN号 | 0016-8505 |
| DOI | 10.1680/jgeot.24.00053 |
| 通讯作者 | Zhou, Gordon G. D.(gordon@imde.ac.cn) |
| 英文摘要 | Slit dams play a crucial role in mitigating natural granular flows in the form of geophysical mass movements. The accurate estimation of the maximum force experienced by slit dams is a vital consideration in their design. However, understanding of the coupled influence of the incoming flow conditions and dam geometry, specifically the slit size and spacing, on the granular flow impact characteristics and forces remain incomplete. In this research, the Discrete Element Method (DEM) is used to simulate the interaction process between gravity-driven granular flows and slit dams with varying slit sizes and slit spacing. Impact characteristics are evaluated from the forces and pressures experienced by the barrier that falls between two slits, here called the divider. For a constant divider size, increasing the slit size amplifies the maximum impact force. However, once it exceeds a threshold size, enlarging the slit size diminishes the force due to a restriction from run-up height. Conversely, maintaining a constant slit size while increasing the divider size weakens the force. The influence of the slit and divider size and incoming flow conditions on the maximum force are summarized by a scaling relationship that captures the linear dependence of the impact force on the ratio of slit and divider size. Pressure distribution models are further proposed based on this scaling relationship. These outcomes provide new insights for the design of effective flow-resisting slit dams. |
| WOS关键词 | DEBRIS |
| 资助项目 | National Key R&D Program of China[2024YFE0104200] ; National Natural Science Foundation of China[12250410257] ; Science and Technology Research Program of Institute of Mountain Hazards and Environment, Chinese Academy of Sciences[IMHE-ZDRW-09] ; Key Collaborative Research Program of the Alliance of International Science Organizations[ANSO-CR-KP-2021-07] ; Sichuan Science and Technology Program[2024NSFJQ0043] |
| WOS研究方向 | Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:001380121900001 |
| 出版者 | EMERALD GROUP PUBLISHING LTD |
| 资助机构 | National Key R&D Program of China ; National Natural Science Foundation of China ; Science and Technology Research Program of Institute of Mountain Hazards and Environment, Chinese Academy of Sciences ; Key Collaborative Research Program of the Alliance of International Science Organizations ; Sichuan Science and Technology Program |
| 源URL | [http://ir.imde.ac.cn/handle/131551/58618]  |
| 专题 | 成都山地灾害与环境研究所_山地灾害与地表过程重点实验室 |
| 通讯作者 | Zhou, Gordon G. D. |
| 作者单位 | 1.Tongji Univ, Coll Civil Engn, Dept Geotech Engn, Shanghai 200092, Peoples R China 2.Hong Kong Polytech Univ, Dept Civil & Environm Engn, Hong Kong, Peoples R China 3.CAS HEC, China Pakistan Joint Res Ctr Earth Sci, Islamabad, Pakistan 4.Univ Chinese Acad Sci, Beijing 100000, Peoples R China 5.Chinese Acad Sci, Inst Mt Hazards & Environm, Key Lab Mt Hazards & Engn Resiliences, Chengdu 610000, Peoples R China |
| 推荐引用方式 GB/T 7714 | Li, Nanjun,Zhou, Gordon G. D.,Cui, Kahlil F. E.,et al. The influence of the slit size and spacing on the impact dynamics of dry granular flows on slit dams[J]. GEOTECHNIQUE,2024:38. |
| APA | Li, Nanjun,Zhou, Gordon G. D.,Cui, Kahlil F. E.,Kong, Yong,&Huang, Yu.(2024).The influence of the slit size and spacing on the impact dynamics of dry granular flows on slit dams.GEOTECHNIQUE,38. |
| MLA | Li, Nanjun,et al."The influence of the slit size and spacing on the impact dynamics of dry granular flows on slit dams".GEOTECHNIQUE (2024):38. |
入库方式： OAI收割
来源：成都山地灾害与环境研究所
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