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洞坪水电站枢纽工程最大坝高134m,采用表孔与中孔联合运行的消能方式。挑流鼻坎采用窄缝式消能工体型,迫使水舌纵向拉长、横向扩散,利用表、中孔沿拱坝径向布置的特点,又迫使表、中孔的挑流水舌在空中相互碰撞掺气消能,从而大大减轻了抛射水流对下游河床的冲刷。中孔(1号)挑流水舌因鼻坎侧收缩而导致直接冲刷右岸山体,对其左侧边墙优化后,消除了水舌对右岸山体的威胁。
The maximum dam height of Dongping Hydropower Station is 134m. The energy dissipating mode of combined operation of surface hole and mesopore is adopted. Slit nose ridge narrow slit dissipator body size, forcing longitudinal extension of water tongue, horizontal diffusion, the use of table, the hole along the radial layout of the characteristics of the dams, but also forcing the table, the hole in the air pick the tongue in the air each other Collision aeration energy dissipation, thus greatly reducing the erosion of the jet stream downstream of the riverbed. In the hole (No. 1) pick the flow of tongue due to contraction of the nose side of the ridge caused by direct erosion of the right bank of the mountain, the left side of the wall optimized to eliminate the water tongue on the right bank of the mountain threat.