天河口水库弯曲溢洪道改造设计  

Design on modification of curved spillway of Tianhekou reservoir

作　　者：李涛 陈朝旭 彭琦 

机构地区：[1]长江勘测规划设计研究院,湖北武汉430010 [2]国家大坝安全工程技术研究中心,湖北武汉430010

出　　处：《人民长江》2011年第12期69-73,共5页Yangtze River

基　　金：国家"十一五"科技支撑计划"病险水库除险加固关键技术研究"(2006BAC14B04);国家大坝安全工程技术研究中心资助项目(2009FU115×17)

摘　　要：由于受地形条件限制,天河口水库改建溢洪道需在泄槽段设置弯道,这样,将导致弯道两岸产生水面差,凹岸水面壅高。为了降低泄槽段弯道水流产生冲击波的不利影响,尽可能地控制最大横向水面差,减小两侧边墙高度,使入池水流流速分布均匀,提出在泄槽段设置导流墙的工程措施,改善弯道凹岸一侧的水流流态。采用导流墙相对简单,施工方便,对流量的适应性比较强,符合溢洪道水力特性的要求。通过导流墙方案与渠底横向坡方案的水工模型试验比较分析,验证了导流墙方案设计的合理性,可供其他类似工程参考借鉴。With the limitation of topographic conditions,we arranged curved channel in discharge trough when reconstructing spillway of Tianhekou reservoir,which resulted in the water surface difference of two side banks,and water surface was higher at convex bank.To reduce negative effects of the shock waves produced by curved flow in discharge trough,control the maximum lateral surface difference as much as possible and reduce the height of side walls with evenly-distributed flow velocity into the pool,we proposed the engineering measure of arranging the guide wall in discharge trough to improve the flow regime of concave bank in the channel.The guide wall construction was convenient,had strong adaptability to the flow and it complied to the requirements of hydraulic characteristics of spillway as well.Compared with the hydraulic model experiments of guide wall scheme and transversal slope at the bottom of channel scheme,the results showed that design of guide wall scheme was rational.

关 键 词：溢洪道 弯道 导流墙 急流 冲击波 模型试验 

分 类 号：TV698[水利工程—水利水电工程]