台阶溢流坝的三维水力特性数值模拟

本文简单介绍了台阶式消能工在国内外的应用和发展前景,并以太湖水库工程为例,通过流体仿真软件对该工程的台阶式溢流坝和光滑溢流坝进行数值仿真,对比研究两种溢流坝体形的消能效果、压强场和速度场等.结果表明,台阶式溢流坝的消能主要集中在台阶上,相对于光滑溢洪道,因其减小对下游的冲刷而降低了工程投资.     

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。     

老挝南塔河1^#水电站泄流雾化研究

根据老挝南塔河1^#水电站泄洪流量大、挑流鼻坎设置较低的实际情况,应用我国现有的研究成果,定性地分析了溢洪道挑流消能所产生的雾化影响范围。研究表明,在渲泄设计洪水时对下游边坡和上坝公路等建筑物不会产生不利的影响。     

Scour process caused by multiple subvertical non-crossing jets

The scour process induced by plunging jets is an important topic for hydraulic engineers. In recent decades, several researchers have developed new strategies and methodologies to control the scour morphology, including different jet arrangements and structures located in the stilling basin. It has been found that multiple jets can cause less scouring than single plunging jets. Based on this evidence, this study aimed to investigate the equilibrium morphology caused by multiple non-crossing jets. A dedicated laboratory model was built and experimental tests were carried out under different combinations of jet inclination angles, by varying the tailwater level and the virtual crossing point location, which was set below the original channel bed level. It was experimentally shown that the equilibrium scour morphology depends on the jet discharge, the differences in non-crossing jet inclination angles, the downstream water level, and the distance of the virtual crossing point from the original channel bed level. In particular, the last parameter was found to be one of the most influential parameters, because of the resulting flow patterns inside the water body. Furthermore, the analysis of experimental evidence allowed for a complete and detailed classification of the scour hole typologies. Three different scour typologies were distinguished and classified. Finally, based on previous studies, two novel relationships have been proposed to predict both the maximum scour depth and length within a large range of hydraulic and geometric parameters.     

深孔微差挤压爆破在Kesem大坝溢洪道开挖中的应用

结合埃塞俄比亚Kesem大坝溢洪道开挖工程,详细介绍了微差挤压爆破法及其相关参数的选择和确定,并提出运用微差挤压爆破法时应注意的几个问题.     

酌江水库溢洪道泄槽转弯收缩段加固设计处理

根据酌江水库溢洪道地形地质实际情况,从安全、技术、经济等角度,介绍了溢洪道泄槽转弯收缩段加固设计处理措施.