糯扎渡水电站水垫塘护坡不护底试验研究  

Model Test on Cushion Pool with Lining Slope but No Bottom Protection in Nuozhadu Hydraulic Power Station

作　　者：徐国宾[1] 尹伟波[1] 练继建[1] 彭新民[1] 

机构地区：[1]天津大学建筑工程学院,天津300072

出　　处：《长江科学院院报》2007年第3期1-4,15,共5页Journal of Changjiang River Scientific Research Institute

摘　　要：通过水工模型试验,对糯扎渡水电站溢洪道水垫塘护坡不护底方案进行了可行性研究。在水垫塘平底板(护底)情况下,根据测试出的时均压力、脉动压力和上举力分布分析了底板及边坡的稳定性,以及可能破坏的范围;在水垫塘护坡不护底情况下,研究了各泄洪工况下水垫塘底部及坡脚的冲(淘)刷形态,最大冲(淘)刷深度;在此基础上,分析了水垫塘坡脚淘刷原因,提出了水垫塘的优化布置体型,即扩宽水垫塘并加设护坡台板。试验结果表明,优化后的水垫塘采用护坡不护底方案是可行的。A feasible research on cushion pool of Nuozhadu Hydropower Station with lining slope but without bottom protection is carried out by a hydraulic model with a scale 1 ： 100. With bottom protection, the stability and possible destructive zone of bottom and slope of the cushion pool are studied according to time-average pressure, fluctuating pressure and uplift force. With lining slope but without bottom protection, the scouring shape and maximum scouring depth of the pool bottom and toe are measured under various working cases, damage causes of the toe are analyzed, and an optimized scheme, i. e., appropriately enlarging width of the cushion pool and adding a bedplate protection, is proposed. The test results show that this scheme is feasible.

关 键 词：水垫塘 护坡不护底 上举力 护坡台板 糯扎渡 

分 类 号：TV861[水利工程—水利水电工程]