下坂地导流泄洪洞底洞进口形式研究

Research on the form of the intaking tunnel on division tunnel project at Xiabandi

以下坂地水利枢纽工程为例,介绍了水利枢纽导流泄洪洞工程底洞进水口的设计方案,分析了原设计方案存在的问题,提出采用异形进水口,利用弧面压顶、三向收缩,取消临时进口封堵塔的方案,并对原方案和新提出的方案进行了对比分析,指出新方案极大地减小了施工风险,节省了工程投资,为工程按期截流和蓄水发电创造了有利条件.

this paper states the designing plan of the intaking tunnel on division tunnel project in Xiabandi Hydro Centre Project. By analyzing problems that previous designing plan, applying the plan of non-formula and canceling temporary intake through camber on the top and compressing from three directions. Then it contrasts previous plan and new plan which decreases construction risks, saves invest and provides favorable condition for stopping flow and producing electricity through sluice.