走马垅水库溢洪道加固设计

根据走马垅水库溢洪道实际存在的问题,提出了该溢洪道加固设计方案,有效的解决了溢洪道存在的问题,确保了工程的安全行洪.     

三峡工程泄洪坝温控措施实施效果

按施工单位申报经监理批准，１９９９年浇筑计划为２２０万ｍ＾３，至１９９９年１２月３１日年完成２２６．４万ｍ＾３，其中泄洪坝段完成１７４．９３万ｍ＾３。大坝混凝土浇筑的主要区域为基础的束区。由于浇筑手段形成较晚等原因，约束区的混凝土大部在气温较高的５－９月施工，使温控难度增加，但在参建各方的努力下采取了一系列温控措施，取得了较好效果。     

中陵水库溢洪道改建方案的比选

介绍在中陵水库除险加固工程溢洪道改建方案的选择中,全面考虑了水库安全、库区淹没限制、工程投资等因素,进行多个方案的比选,使得工程改建运行后效果最佳.     

枣木水库泄洪建筑物结构安全复核

针对枣木水库溢洪道侧堰、低堰、陡槽弯道、挑流消能等特点,结合模型实验成果,采用新的洪水标准,进行结构安全复核,对溢洪道安全作出评价,并提出处理措施和建议.     

我省水库溢洪道挖潜改造的思考

讨论了已建水库无闸控制溢洪道进口段的挖潜改造问题。从列举的工程实例可以看出，溢洪道进口型式的选择，对提高水库的效益是非常重要的。     

横泉水库泄洪洞进口支护方法

横泉水库泄洪洞进口地质条件复杂，岩石风化严重，围岩稳定性较差。文中提出了洞挖前对围岩的处理方案，该方案采用了灌浆及锚喷等多种综合技术。     

天白水电站溢洪道消能结构形式优化试验研究

天白水电站布置在山区转平原入口的冲积扇上,枢纽消能防冲的方案设计关系到建筑物的安全和下游河床河岸的稳定。为改善其消能段的水流流态,提高效能效率,本文通过整体水工模型试验,在原设计方案的基础上,对消能段体形进行了优化,实际效果来看,推荐方案下消能段水流流态有了明显改善,消能效率也大幅提高,达到了较为理想的消能效果。     

浅谈金钱面水库除险加固设计

结合金钱面水库工程的缺陷和隐患,分析了土石坝除险加固的原则,以及水库除险加固设计的原理和方法,提出了该工程相应的除险加固设计方案.     

中洲水库溢洪道除险加固设计

根据中洲水库溢洪道存在堰基严重渗漏、堰体质量差、底板和边墙衬砌失去功能,无消能设施,无尾水渠,不具备安全泄洪条件等问题,按照因地制宜的原则,溢洪道平面布置维持布置格局不变,进行了溢洪道水力设计的泄洪能力复核及堰体、边墙、消力池、出水渠等加固设计.     

An iterative hydraulic design methodology based on numerical modeling for piano key weirs

Piano Key Weir (PKW) is a special type of overflow weir which provides an improved discharge capacity with its increased crest length. Increased discharge capacity makes this weir an attractive alternative in the rehabilitation of existing spillways. After the introduction of this new weir type, many experimental and numerical studies are conducted to understand the effect of the numerous geometrical parameters on the discharge capacity. However, empirical discharge formulas suggested by different researchers are not conforming to a unique expression mostly due to dependence on the experimental conditions from which they are derived. A numerical approach is used in the present study to investigate the dependence of discharge capacity of a PKW unit on several geometric parameters. Numerical models are developed and three-dimensional velocity fields are computed using FLOW-3D® software. Discharge efficiency of a PKW over an equivalent linear sharp-crested weir is evaluated within the practical range of parameters from 145 numerical solutions for 29 different PKW models. Numerically obtained data is used to form dimensionless expressions for the weir height and length as function of discharge efficiency which are proposed to facilitate an iterative numerical solution to meet the design requirements of a given project. This approach allows cost optimization while dimensioning the PKW for the required hydraulic capacity. The design procedure based on iterative numerical solutions is described and exemplified.