Influence of ballast gradation on repose angle using large-scale hopper flow tests and DEM simulation
文献类型：期刊论文
| 作者 | Chen, Cheng2; Li, Shao-shuo2; Li, Jun-feng1; Zhang, Lei2; Yang, Juan2 |
| 刊名 | POWDER TECHNOLOGY
 |
| 出版日期 | 2025-04-30 |
| 卷号 | 456页码:17 |
| 关键词 | Hopper flow test Railway ballast Particle size distribution Repose angle Discrete element method |
| ISSN号 | 0032-5910 |
| DOI | 10.1016/j.powtec.2025.120852 |
| 英文摘要 | This study investigates the influence of ballast gradation on the repose angle through a series of large-scale hopper flow tests and discrete element method (DEM) simulations. Bulk-scale and micro analyses of the entire ballast pile formation process reveal three stages: platform-stacking, peak-stacking, and peak-shaving, with particle interlocking during these stages playing a crucial role in establishing the angle of repose. Results indicate that ballast gradation significantly affects the repose angle, the maximum repose angle is observed at d50 = 40.0 mm, within the tested range of 36.8 mm to 45.0 mm. As the gradation of the ballast transitions from uniform to non-uniform, the repose angle initially increases and then decreases, peaking at d50 = 40.0 mm and Cu= 1.46. The spatial distribution of particles within the ballast pile follows a distinct pattern, large particles within the ballast pile is relatively uniform, while small and medium particles are more concentrated in the core regions. A better particle gradation allows smaller particles to fill the voids between larger particles, thereby optimizing the load distribution between strong and weak force chains. This research underscores the importance of proper gradation for ensuring stability and effective load-bearing capacity in ballast systems. |
| 资助项目 | National Natural Science Foundation of China[51708438] ; Sanya Science and Education Innovation Park of Wuhan University of Technology[2022KF0025] |
| WOS研究方向 | Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:001440541300001 |
| 出版者 | ELSEVIER |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/36879]  |
| 专题 | 中科院武汉岩土力学所 |
| 通讯作者 | Zhang, Lei |
| 作者单位 | 1.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China 2.Wuhan Univ Technol, Sch Civil Engn & Architecture, Wuhan 430070, Hubei, Peoples R China |
| 推荐引用方式 GB/T 7714 | Chen, Cheng,Li, Shao-shuo,Li, Jun-feng,et al. Influence of ballast gradation on repose angle using large-scale hopper flow tests and DEM simulation[J]. POWDER TECHNOLOGY,2025,456:17. |
| APA | Chen, Cheng,Li, Shao-shuo,Li, Jun-feng,Zhang, Lei,&Yang, Juan.(2025).Influence of ballast gradation on repose angle using large-scale hopper flow tests and DEM simulation.POWDER TECHNOLOGY,456,17. |
| MLA | Chen, Cheng,et al."Influence of ballast gradation on repose angle using large-scale hopper flow tests and DEM simulation".POWDER TECHNOLOGY 456(2025):17. |
入库方式： OAI收割
来源：武汉岩土力学研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。