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(一) 概况岩滩水电站溢流坝段设有7个表孔、8个闸墩,其中1号边墩厚11.35m,下设一个3×5m的冲沙孔,2～6号中墩每个厚5m,7号中墩厚13m,下设一个5×8m的泄水孔,8号边墩厚5m。表孔每孔净宽为15m,堰顶高程为202.0m,正常高蓄水位为223.0m高程.每个表孔设置一扇弧形工作闸门,弧门的挡水面积在正常高蓄水位时为15×21.49m~2,考虑超高挡水时为15×22.49m~2,闸墩承受的单支铰门推力为23160kN(总推力为46320kN).设计研究决定,溢流坝闸墩全部采用预应力混凝
(I) Overview The Yanyan Hydropower Station Spillway Section is equipped with seven surface holes and eight gate piers. The No. 1 side pier is 11.35m thick with a 3 × 5m red sand hole. The No. 2 to No. 6 pier A thickness of 5m, No. 7 in the thick 13m, under a 5 × 8m of the scupper, No. 8 side pier thickness 5m. Each hole hole width 15m, weir top elevation of 202.0m, the normal high water level of 223.0m elevation.Each table hole set up a work arc gate, the arc gate of the water area in the normal high water level 15 × 21.49m ~ 2, 15 × 22.49m ~ 2 considering the ultra-high retaining water, and the single thrust of the pier supported by the pier is 23160kN (the total thrust is 46320kN) .Design and study decision, all the spillway pier Prestressed concrete