| 滑坡体散体化对涌浪波动特征的影响 |
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| 引用本文： | 郑飞东,王平义,李云.滑坡体散体化对涌浪波动特征的影响[J].水科学进展,2022,33(5):826-834. |
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| 作者姓名： | 郑飞东 王平义 李云 |
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| 作者单位： | 1.重庆交通大学河海学院, 重庆 400074 |
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| 基金项目： | 国家重点研发计划资助项目2018YFB1600400重庆市自然科学基金资助项目cstc2020jcyj-bshX0043 |
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| 摘 要： | 岩质滑坡在下滑过程中会发生散体化, 进而分解成形状及大小各异的块体。已有滑坡体兴波方面的研究多采用单一刚性块体或均匀散体颗粒对滑坡体进行模拟, 较少关注滑坡体散体化对涌浪的影响机制。本研究通过开展三维水池物理模型试验, 初步探索滑坡体的散体化过程对涌浪波动特性的影响作用。结果表明: 初生涌浪的最大波幅和最大波高随滑坡体散体化指标的增大而减小; 第一波峰幅值和第一波高的沿程衰减规律符合孤立波理论, 且其衰减速率分别依赖于涌浪的最大波幅和最大波高; 三维水池试验中第一波峰幅值和第一波高的沿程衰减速度较二维水槽中更快。
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| 关 键 词： | 滑坡涌浪 岩质滑坡 散体化过程 波浪衰减 |
| 收稿时间： | 2022-03-27 |
Effect of landslide disintegration on free-surface characteristics of landslide-generated waves |
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| Affiliation: | 1.College of River and Ocean Engineering, Chongqing Jiaotong University, Chongqing 400074, China2.Nanjing Hydraulic Research Institute, Nanjing 210029, China |
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| Abstract: | A rock landslide in channel reservoirs typically undergoes a disintegration process during the rundown on an inclined plane, that is, disintegrating into numerous blocks of different shapes and sizes. In previous studies on landslide-generated waves, landslides were mainly represented by a rigid body or a granular cluster of uniform granulates. However, the effect of landslide disintegration on landslide generated waves has not yet received significant attention. In this study, the effect of the disintegration process of a landslide during rundown on free-surface characteristics of landslide generated waves in a wave basin was preliminarily investigated. The results showed that the maximum wave amplitude and maximum wave height decreased with increasing disintegration index parameter. The leading wave amplitude and wave height attenuation in the landslide axis during wave propagation could be satisfactorily described based on the solitary wave theory. Moreover, the leading wave amplitude and wave height decay behaviours were mainly dependent on the maximum wave amplitude and the maximum wave height, respectively. It was also found that the wave attenuation was higher in a wave basin than in a wave channel. |
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