| 于沭,陈祖煜,杨小川,苏安双,李炎隆,周嘉伟.淤地坝柔性溢洪道泄流模型试验研究[J].水利学报,2019,50(5):612-620 |
| 淤地坝柔性溢洪道泄流模型试验研究 |
| Flow discharge model test study of soft spillway on check dam |
| 投稿时间：2019-02-01 |
| DOI：10.13243/j.cnki.slxb.20190085 |
| 中文关键词: 淤地坝 PET复合材料 柔性光滑溢洪道 柔性台阶溢洪道 |
| 英文关键词: check dams PET composite soft smooth spillway soft step spillway |
| 基金项目:国家自然科学基金重点项目（41731289）；国家自然科学基金面上项目（51879285）；中国科学院学部咨询评议项目（2018-Z02-A-008） |
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| 摘要点击次数: 2017 |
| 全文下载次数: 1071 |
| 中文摘要: |
| 本文提出了一种新型复合PET材料以及柔性溢洪道布置型式，该材料具有良好的抗水流冲刷及防止土颗粒流失特性。进行了光滑、台阶两种型式柔性溢洪道泄流模型试验，作为对比试验还进行了无防护条件的坝体泄流模型试验。对比分析了光滑及台阶溢洪道的泄洪水流流态、消能率，结果表明柔性台阶溢洪道消能率明显高于光滑溢洪道。泄流前、后溢洪道的变形结果表明，两种溢洪道变形都很小，未发生破坏，结构稳定性良好。综合分析认为，柔性台阶溢洪道更适合工程应用。无防护条件的坝体泄流试验表明，在没有溢洪道保护的条件下，土坝坝体是不具备过水能力的，溢洪道保护坝体的作用明显。研究结果对柔性溢洪道向淤地坝工程推广提供了技术支撑。 |
| 英文摘要: |
| In this paper, a new type of composite PET material and soft spillway layout is proposed, which has good characteristics of water erosion resistance and soil particle loss prevention. Two types of soft spillway discharge model tests of smooth surface and step are carried out. The flow patterns and energy dissipation ratio of the smooth and step spillway are compared and analyzed. The results show that the ener-gy dissipation ratio of the soft step spillway is significantly higher than that of the smooth surface spillway. The deformation characteristics of the spillway before and after the discharge are also analyzed. The results show that, the two types of spillway deformations are small and structural stability of them are fine. Based on the comprehensive analysis, it is considered that the soft step spillway is more suitable to apply in the hydraulic engineering. The flow discharge experiment of an earth dam without protection shows that the earth dam without spillway has no capacity to flow discharge and the spillway plays an important role in the protection of the earth dam. The experimental results provide technical support for the promotion of the soft spillway to the check dam project. |
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