Numerical investigation of effects of baffles - deceleration strip hybrid system on rock avalanches
文献类型：期刊论文
| 作者 | Bi Yu-zhang; He Si-ming; Du Yan-jun; Shan Jie; Yan Shuai-xing; Wang Dong-po; Sun Xin-po |
| 刊名 | JOURNAL OF MOUNTAIN SCIENCE
 |
| 出版日期 | 2019 |
| 卷号 | 16期号:2页码:414-427 |
| 关键词 | Rock avalanches Baffles Hybrid system Energy dissipation Impact force |
| ISSN号 | 1672-6316 |
| DOI | 10.1007/s11629-018-4908-3 |
| 文献子类 | Article |
| 英文摘要 | Arrays of baffles are usually installed in front of protection site to attenuate the flow energy of rock avalanches in mountainous areas. Optimization design is crucial for efficiency promotion in hazard energy dissipation engineering. In this study, a deceleration strip was added in the baffles protection system to optimize the traditional baffles system. The effects of the baffles - deceleration strip hybrid protection system was discussed in detail with the nails number and nails angle. This study presents details of numerical experiments using the discrete element method (DEM). The effect of the optimization of hybrid protection system (nail angle and nail number) were investigated specifically, especially the impact force that avalanches exerted on structures. The results show that the maximum impact forces and kinetic energy of the rock avalanches decreases with the increase of the number and angle of the nail. Moreover, the distance between the toe and the bearing structure (L-m) is also a key factor. The shorter the distance L-m (30m) is, the higher the maximum impact force are. The longer the distance L-m (70m) is, the lower the maximum impact force are. Under the same size of the nails, increasing the numbers can enhance the dissipation ability of the hybrid protection system. Meanwhile, increasing its angle can also enhance the dissipation ability. There are three key ways for nails attenuate rock avalanches: (i) block the fine particles directly; (ii) form the particles bridge between nails and baffles; (iii) dissipate the coarse particles energy directly. The effect of segregation in rock avalanches is crucial for the energy dissipation mechanism, which is a key factor to optimize the traditional baffle system. |
| 电子版国际标准刊号 | 1993-0321 |
| 语种 | 英语 |
| WOS记录号 | WOS:000458657000013 |
| 源URL | [http://ir.imde.ac.cn/handle/131551/46437]  |
| 专题 | Journal of Mountain Science_Journal of Mountain Science-2019_Vol16 No.2 |
| 推荐引用方式 GB/T 7714 | Bi Yu-zhang,He Si-ming,Du Yan-jun,et al. Numerical investigation of effects of baffles - deceleration strip hybrid system on rock avalanches[J]. JOURNAL OF MOUNTAIN SCIENCE,2019,16(2):414-427. |
| APA | Bi Yu-zhang.,He Si-ming.,Du Yan-jun.,Shan Jie.,Yan Shuai-xing.,...&Sun Xin-po.(2019).Numerical investigation of effects of baffles - deceleration strip hybrid system on rock avalanches.JOURNAL OF MOUNTAIN SCIENCE,16(2),414-427. |
| MLA | Bi Yu-zhang,et al."Numerical investigation of effects of baffles - deceleration strip hybrid system on rock avalanches".JOURNAL OF MOUNTAIN SCIENCE 16.2(2019):414-427. |
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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