渠江风洞子航电枢纽凸岸取水防沙问题研究

Experimental Study of Water Diversion and Sediment Prevention at Convex Bank for Feng Dongzi Project in Qujiang River

渠江风洞子航电枢纽是以航运为主，结合发电的综合利用水利枢纽工程．电站取水口布置于弯道凸岸一侧，取水位置不利．本文结合风洞子枢纽整体模型试验研究成果，分析了枢纽建成前后坝区河段不同水沙运动规律，论证电站取水口及尾水渠平面布置的合理性，研究了库区泥沙淤积对电站引水防沙的影响，尤其是对于电站厂房取水口布置于弯曲河道凸岸，电站进口前池能否保持门前清问题，提出改善取水口引水防沙条件的优化工程措施，并采用拦沙、导沙、拉沙的综合防沙系统，取得较好的引水防沙效果．

Navigation and hydropower project at Feng Dongzi in Qujiang River is a comprehensive utilization hydro junction of navigation combining with water power.Water intake for hydro power station is located at the unfavorable convex bank in the bending river.In connection with the results of model test,this paper studies the different moving characteristics of water and silt in the reach of dam region before and after the project is built.The reasonableness of plane layout for water intake and fail water channel is shown,and the influence on sand prevention during water diversion for reservoir sedimentation is discussed.It is put forward to project measures of improving conditions of sand prevention during water diversion for hydroplant intake,and synthetic system of sand prevention for intercepting sand,leading sand,and draining sand is adopted.Better effects for sediment control are gained.The recommended schemes have been adopted by design department.