| 巨江,兰志良.溃坝扩散模型（DB-D）在堤坝溃决分析中的应用[J].中国水利水电科学研究院学报,2025,23(4):345-353,364 |
| 溃坝扩散模型（DB-D）在堤坝溃决分析中的应用 |
| Application on dam-break diffusion model of analysis of dyke and dam failure |
| 投稿时间：2024-08-20 |
| DOI：10.13244/j.cnki.jiwhr.20240168 |
| 中文关键词: 溃坝 扩散模型 土石坝 堰塞湖 防洪堤 |
| 英文关键词:dam break diffusion model earth-rock dams barrier lake flood control dyke |
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| 摘要点击次数: 84 |
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| 中文摘要: |
| 现有的溃坝洪水分析模型理论与方法存在诸多缺陷，导致计算结果与实测资料相差甚远，而基于河流动力学原理的溃坝扩散模型理论严谨、计算简捷高效、成果合理。本文应用溃坝扩散模型（DB-D）分析小岗剑上堰塞湖溃决过程以及初始溃口宽度、深度对泄流特性的影响；模拟了洞庭湖溃堤溃口侵蚀下切过程、溃口展宽过程以及溃口流量、流速、水深变化过程线等；以某两座大型堆石坝连溃为例，得到的上下库溃口流量、流速过程线、库水位降落与溃口高程下切过程线、溃口展宽过程线等与实测资料吻合良好，溃口纵剖面、横断面形状变化合理。研究给出应用溃坝扩散模型进行堰塞湖、防洪堤、堆石坝溃决分析时冲刷参数A和展宽系数k的选取方法，为同类工程的防洪抢险应用提供了参考。 |
| 英文摘要: |
| The existing theories and methods of dam break flood analysis models have numerous flaws， causing the computational results to deviate significantly from engineering cases. However， the Dam Break Diffusion （DB-D） model based on the principles of river dynamics is theoretically rigorous， computationally simple and efficient， and the results are reliable. In this paper， The DB-D model is applied to analyze the failure process of the barrier lake upstream of Xiaogangjian and the influence of the initial width and depth of the break on the discharge characteristics. The undercutting erosion process of the Dongting Lake levee breach and the widening process of the breach， as well as the flow， velocity，water depth hydrograph aresimulated. Taking the consecutive failures of two large rockfill dams as an example， the computational flow and velocity hydrographs of the break of the upper and lower dams， the water level drop and the undercutting process of the break elevation， and the widening process of the break are in good agreement with the measured data， and the shape changes in the longitudinal profile and cross section of the break are reasonable. The selection methods of different parameters in the analysis of the failures of barrier lakes， levees， and rockfill dams are presented， which can provide a reference for the flood control and emergency design of similar projects. |
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