| 邓成进,党发宁,陈兴周.库区滑坡涌浪传播及其与大坝相互作用机理研究[J].水利学报,2019,50(7):815-823 |
| 库区滑坡涌浪传播及其与大坝相互作用机理研究 |
| Study on the surge wave propagation in the reservoir area and its interaction mechanism with the dam |
| 投稿时间：2019-02-21 |
| DOI：10.13243/j.cnki.slxb.20190113 |
| 中文关键词: 滑坡涌浪 数值模拟 水工模型试验 涌浪高度 动水头 |
| 英文关键词: landslide surge wave numerical simulation hydraulic model test surge height moving head |
| 基金项目:国家重点研发计划（2017YFC0404803） |
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| 摘要点击次数: 2328 |
| 全文下载次数: 1207 |
| 中文摘要: |
| 库区滑坡涌浪可能危及大坝及下游安全，基于流体动力学的滑坡涌浪数值模拟可获得完整的分析数据，将成为研究滑坡涌浪与大坝作用过程的重要手段。本文以某大坝上游约1300 m的3#变形体滑坡涌浪为研究对象，建立库区三维滑坡涌浪数值模型，并通过水工物理模型试验对其模拟精度和有效性进行了验证。研究结果表明，数值模拟得出的涌浪高度变化、水面起伏过程与水工物理模型试验结果基本一致，数值模拟能反映滑坡涌浪传播及其与大坝相互作用的整个过程。最后基于数值模拟获得的数据，分析了滑坡涌浪与大坝作用过程，以及坝面动水头与坝前涌浪高度的变化关系。分析认为，库区水体反复震荡、叠加而形成的涌浪对下游沿岸安全危害可能更大，大坝坝顶及下游有必要采取避险措施；最大动水头小于涌浪高度，若采用静力方法计算分析坝体稳定应力，其结果偏于安全。 |
| 英文摘要: |
| Landslide surge in the reservoir area endanger safety of the dam and downstream regions. Based on the numerical simulation of hydrodynamics, complete analytical data can be obtained, which will become an important means to study the process of landslide surge propagation and its interaction with the dam. The research object in this paper is the #3 deformation body landslide surge of about 1300 m upstream of a dam, and a numerical model of three-dimensional landslide surge is established in the reservoir area. The accuracy and effectiveness of the landslide model are verified by hydraulic physical model test. The results show that the variation of surge height and the fluctuation process of water surface obtained by numerical simulation are basically in agreement with the experimental results of hydraulic physical model, and there are some errors in numerical value. The numerical simulation can reflect the whole macroscopic process of the wave propagation and its interaction with the dam. Finally,through the data obtained by numerical simulation, the relationship between landslide surge and dam action, and the relationship between moving head and swell height are analyzed.Due to the interaction between the surge and the dam, the surge caused by repeated turbulence and superposition of water in the reservoir area will cause greater harm to the safety of the downstream coast. The hydrodynamic pressure of the landslide is related to the height of the surge and the fluctuating frequency. The necessary circumvention measures should be taken at the top and downstream of the dam. And the maximum moving head is smaller than the swell height, while the static method is used to calculate and analyze the stability and stress of the dam, and the result will be more safety. |
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