大朝山水电站碾压混凝土重力坝台阶式溢流面设计  

Design of step-overflow surface of surface outlet on RCC gravity dam for Dachaoshan Hydropower Station

作　　者：雷兴顺[1] 张勇[2] 欧阳松[2] 张国来 

机构地区：[1]水利部水利水电规划设计总院,北京100011 [2]北京勘测设计研究院,北京100024 [3]中国水利水电建设集团公司,北京100038

出　　处：《水利水电技术》2005年第7期60-63,共4页Water Resources and Hydropower Engineering

摘　　要：大朝山水电站碾压混凝土重力坝的最大坝高为111m,设计洪水位为899m(500年一遇),此时,表孔下泄的设计流量为9992m3/s,堰顶设计单宽流量为132.7m3(/s·m)。通过多次表孔水工模型试验研究和近三年表孔泄水运行,验证了大朝山水电站碾压混凝土重力坝的表孔采用宽尾墩、台阶式溢流面和戽式消力池联合消能的设计方案是合理可行的,为全段面碾压混凝土重力坝和表孔溢流面的设计开拓了新的思路。The maximum height of the RCC gravity dam for Dachaoshan Hydropower Station is 111 m, and its design flood level is 899 m （500-year flood return period）. In that case, the design discharge of the sluice weir is 9992 m^3/s, and design unit discharge is 132.7 m^3/（s·m）. Through the study with the hydraulic model tests and the sluicing in the last 3 years, the results show that the design scheme of the energy dissipation for the RCC gravity dam for Dachaoshan Hydropower station is feasible,which combines the flaring pier energy dissipation for the surface outlet, the step-overflow surface and the backet stilling pool.The design makes a new concept for the design of RCC gravity dam and the surface of the surface outlet.

关 键 词：泄水建筑物 表孔 台阶式溢流面 大朝山碾压混凝土重力坝 碾压混凝土重力坝 大朝山水电站 设计洪水位 溢流面 台阶式 戽式消力池 

分 类 号：TV642.2[水利工程—水利水电工程] TV523