Measuring and estimating the impact pressure of debris flows on bridge piers based on large-scale laboratory experiments
文献类型：期刊论文
| 作者 | Wang Dongpo1,2 ; Chen Zheng1; He Siming1,3; Liu Yang2; Tang Hao2
|
| 刊名 | LANDSLIDES
 |
| 出版日期 | 2018 |
| 卷号 | 15期号:7页码:1331-1345 |
| 关键词 | Debris flows Bridge pier Impact pressure Laboratory experiments |
| ISSN号 | 1612-510X |
| DOI | 10.1007/s10346-018-0944-x |
| 产权排序 | 1 |
| 通讯作者 | He Siming |
| 英文摘要 | After the 2008 Wenchuan earthquake, mountainous areas in SW China are recognized as a region with highly active and perilous landslides and debris flows. The frequent impacts of debris flow are a major threat to bridge piers located in debris flow gullies. It is an important issue for guaranteeing the safety of railway bridges in areas prone to hazardous debris flows. Previous research has achieved significant results characterizing the initiation and mechanisms for debris flow, and their interactions with some structures. However, there has been little research on the dynamic pressure of debris flow on bridge pier caused by different debris flows. In this study, the measurement and estimation of the impact pressure and dynamic behavior of debris flows on scaled bridge piers were conducted. Nine pressure sensors were used to measure the impact pressure of debris flows. Flow velocities and flow depths were determined at the end of a flume using a high-speed camera. The results show that the impact pressure differed between different types of debris flows. The distribution of impact pressures from high-viscosity debris flows indicated three layers, with different features in individual event. In comparison, a layered structure was not observed in low-viscosity debris flows. Based on dimensional analyses, the impact pressure depended on Froude number (Fr) and Reynolds number (Re). For low-viscosity debris flows, the dimensionless impact pressures were power functions of Fr, while for high-viscosity debris flows, the dimensionless impact pressures were power functions of both Re and Fr. The impact frequencies of low-viscosity and high-viscosity debris flows showed considerable differences based on spectral analysis. Compared to high-viscosity debris flows, low-viscosity debris flows were characterized by relatively high velocity, strong striking pressure, and high impact frequency. |
| 电子版国际标准刊号 | 1612-5118 |
| 语种 | 英语 |
| WOS记录号 | WOS:000437140700006 |
| 源URL | [http://ir.imde.ac.cn/handle/131551/20909]  |
| 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 |
| 作者单位 | 1.Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu; Sichuan; 610041, China; 2.State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu; Sichuan; 610059, China; 3.Center for Excellence in Tibetan Plateau Earth Sciences, Chinese Academy of Sciences, Beijing; 100101, China |
| 推荐引用方式 GB/T 7714 | Wang Dongpo,Chen Zheng,He Siming,et al. Measuring and estimating the impact pressure of debris flows on bridge piers based on large-scale laboratory experiments[J]. LANDSLIDES,2018,15(7):1331-1345. |
| APA | Wang Dongpo,Chen Zheng,He Siming,Liu Yang,&Tang Hao.(2018).Measuring and estimating the impact pressure of debris flows on bridge piers based on large-scale laboratory experiments.LANDSLIDES,15(7),1331-1345. |
| MLA | Wang Dongpo,et al."Measuring and estimating the impact pressure of debris flows on bridge piers based on large-scale laboratory experiments".LANDSLIDES 15.7(2018):1331-1345. |
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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