石门水库左岸泄洪洞挑流鼻坎优化试验研究  

Study on optimal flip bucket of spillway tunnel on left bank of Shimen Reservoir

作　　者：邱存元 谢世军 聂抗意 QIU Cunyuan;XIE Shijun;NIE Kangyi(Hanzhong Shimen Reservoir Administrative Bureau in Shaanxi Province,Hanzhong 723000,China)

机构地区：[1]汉中市石门水库管理局,陕西汉中723000

出　　处：《水利水电快报》2020年第8期58-62,共5页Express Water Resources & Hydropower Information

摘　　要：为了解决石门水库左岸泄洪洞泄水时雾化严重问题,开展了水工模型试验研究,对原挑流鼻坎进行优化,确定了单边左侧小贴脚优化鼻坎体型。通过对挑流鼻坎泄水试验的原型观测,对优化鼻坎水舌进行了宏观特性测量。测量发现:原型试验观测与模型试验呈现规律基本一致,即水舌宽度随着泄水流量的增加而增加。优化鼻坎加大了水流在横向的能量分散,减小了水舌对河道的冲刷,水舌的挑距、溅水范围和高程均小于原鼻坎水舌。试验研究表明:两种挑流鼻坎体型都具有良好消能防冲效果,但优化鼻坎泄水雾化情况较原鼻坎泄水有明显改善。该试验研究成果可为同类泄洪洞挑流鼻坎优化改造提供参考。In order to cope with the severe atomization problem induced by flip bucket type of the spillway tunnel on the left bank of Shimen reservoir,hydraulic model study was carried out to optimize the structure of the original flip bucket,and the optimized bucket type with small-corner was adopted.Prototype observation to flip bucket discharging test was conducted to measure the macro characteristics of the jet nappe of the optimized flip bucket.It was found that prototype test and the model test followed the same law,i.e,the width of jet nappe increases with the increase of discharge.The optimized flip bucket increases the transversal energy dispersion,and thus reduces river channel scouring.The jet-flow distance,splashing range and height of the optimized bucket are smaller than that of the original bucket.The results show that the both types of flip bucket are effective in energy dissipation and anti-scouring,while the optimized flip bucket significantly mitigates the atomization problem.The study provides reference for the optimization of other similar flip bucket of the spillway tunnel.

关 键 词：挑流鼻坎 挑流水舌 水工试验 原型观测 优化设计 石门水库 陕西省 

分 类 号：TV653.3[水利工程—水利水电工程]