关键词: 泄洪冲沙底孔, 挑流消能, 冲坑, 底流消能, 扩散式消力池

Abstract: Weak interlayer towards downstream was contained in the Wuma dam foundation and the downstream channel was S shaped. The high-speed flow from the bottom outlet dashed against the dam toe and the rock downstream which threatened the safety of the dam. Thus, the trajectory bucket type energy dissipation was replaced by bottom-flow energy dissipation in design optimization, worth reference.

Key words: outlet for flood release and sand discharge, trajectory bucket type energy dissipation, scour hole, bottom-flow energy dissipation, diffusion stilling basin