向家坝水电站冲沙孔体型优化设计  

Optimization design of sand sluicing outlet shape of Xiangjiaba Hydropower Station

作　　者：刘要来 周红波 张永涛 潘江洋 

机构地区：[1]中国电建集团中南勘测设计研究院有限公司,湖南长沙430014

出　　处：《人民长江》2015年第2期81-84,共4页Yangtze River

摘　　要：向家坝水电站冲沙孔由导流底孔改建而成,结构体型受到了较大限制,加之冲沙孔下泄水流为高速含沙水流,且紧邻下游引航道,消能防冲设计标准较高。结合向家坝工程实际,通过水工模型试验,从消能效果、消力池临底及临边流速、改造难易度等多方面,对3种冲沙孔体型进行了分析比选,确定了最终的优化体型,较好的解决了出口消能防冲难题。The diversion bottom outlet of Xiangjiaba Hydropower Station was reconstructed into sand sluicing outlet , so its structure and shape were restricted;moreover, the water released from the sand sluicing outlet is high -velocity flow containing sediment, which is near the approach channel at downstream , so the design standard of energy dissipation and erosion control is high.By consideration of the engineering practice , through hydraulic model test , 3 shapes of sand sluicing outlets are analyzed and compared in terms of energy dissipation effect , velocity near bottom and boundary and reconstruction difficulty .The final op-timization is determined , which solved the problem of energy dissipation and erosion control .

关 键 词：冲沙孔 水工模型试验 底流消能 向家坝水电站 

分 类 号：TV653[水利工程—水利水电工程]