曼转河水库泄洪洞下泄流量较大、水流落差大、出口位置处河道狭窄,且原设计中泄洪洞轴线与河道交角近乎垂直、挑距大、水舌落点处水垫层厚度小,冲刷山体严重。针对此工程特点,水工模型试验中分别采用高低坎加大消能、缩短无压段长度、控制闸门开度3种措施控制挑射水流落点,使其归入主河道,减轻了对对岸山体的冲刷,控制水舌落点效果较明显。 Manzhuanhe reservoir spillway discharge flow is larger, large drop in water flow, the outlet of the narrow channel, and the original design of the spillway tunnel axis and the river crossing angle is almost vertical, the distance is large, the water tongue at the point of the cushion thickness is small, erosion Serious mountain. According to the characteristics of this project, hydraulic model tests were adopted high and low ridge to increase energy dissipation, shortening the length of non-pressure section, the control gate opening three kinds of measures to control the jet water fall point, make it into the main channel, reducing the other side of the mountain Of the erosion, control the impact of water droplets more obvious.