| 摘要: |
| 库区滑坡灾害是影响库区安全的共性问题,滑坡失稳产生的涌浪次生灾害会对坝体造成冲击及漫顶等潜在威胁。传统防浪墙抵御涌浪冲击能力有限,亟需探究能够有效拦截高能涌浪爬高的防浪墩阵列结构,目前国内外对于滑坡涌浪拦挡消能结构的研究较少。本文基于室外物理模型试验对滑坡涌浪坝前拦挡结构消能机理开展了系统研究,以高速摄像机精确监测的手段分析坝前涌浪与装置尺寸及排布方式之间的相互作用,获取涌浪最大爬高削减率与防浪墩高度、防浪墩间距、阵列排布位置、双排防浪墩排间距等影响因素的相关关系和敏感度系数。试验结果表明防浪墩相对高度是单排阵列下影响涌浪最大爬高削减率的主要因素,而双排阵列的削减率与排间距正相关,最后通过多元非线性回归分析法拟合出单排阵列下涌浪最大爬高削减率的计算公式,可为库区滑坡涌浪防控措施提供理论支撑。 |
| 关键词: 滑坡涌浪 消能结构 物理模型试验 涌浪拦挡机制 涌浪削减率计算 |
| DOI： |
| 分类号: |
| 基金项目:水利部水库大坝安全重点实验室开放研究基金(YK323002) |
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| Study on mechanism of landslide generated wave dissipation by dam front barrier structure on reservior |
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LI Ao1, ZHOU Shiyi1, XIONG Jiangyi1, YOU Zaiyu1, ZHOU Jiawen2, LI Haibo2, HU Yuxiang3
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1.College of Water Resources and Hydropower, Sichuan University;2.College of Water Resources and Hydropower, Sichuan University/State Key Laboratory of Hydraulics and Mountain River Engineering,Sichuan University;3.College of Water Resources and Hydropower,Sichuan University/State Key Laboratory of Hydraulics and Mountain River Engineering,Sichuan University
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| Abstract: |
| Landslide disaster in reservoir area is a common problem that affects the safety of reservoir area, and the wave generated by landslide instability will cause potential threats to the dam body such as impact and roofing. The traditional wave protection wall has limited ability to resist the impact of waves, and there is an urgent need to investigate the wave protection pier array structure that can effectively intercept high-energy waves to climb up. Fewer studies of the energy dissipation structure are conducted on landslide generated wave. In this paper, based on the outdoor physical model test on landslide surge dam front blocking structure energy dissipation mechanism to carry out a systematic study, with high-speed camera accurate monitoring means to analyze the interaction between the dam front surge and device size and layout, to obtain the maximum wave climbing height reduction rate and the height of the wave protection pier, wave protection pier spacing, array layout location, double rows of wave protection pier rows spacing and other influencing factors such as the correlation between the correlations and sensitivity coefficients. The test results show that the relative height of wave protection piers is the main factor affecting the maximum height reduction rate of surge waves under single-row array, while the reduction rate of double-row array is positively correlated with the spacing between rows, and finally, the formula of maximum height reduction rate of surge waves under single-row array is fitted by the method of multivariate nonlinear regression analysis, which can provide theoretical support for the landslide surge wave prevention and control measures in the reservoir area. |
| Key words: Landslide generated waves energy dissipating structure Physical modeling tests wave dissipating mechanism wave reduction rate |
