底流消能在我区水利工程中应用较多,目前仍是一种主要消能方式。但在应用中多有破坏。本文就底流消能工破坏原因及其设计作一探讨。一、底流消能的破坏原因 1.消力池底板高程降低不够,不能形成淹没水跃,下游发生冲刷,此种破坏占大多数,主要是在设计中对下游水位计算不准确。如青冈县胜利水库泄水渠二级跃水,设计渠道坡降为0.5‰,底宽4m,边坡m=1.5,实际下游水深为1.4m,比设计计算 Underflow energy dissipation in our district water conservancy projects more widely used, is still a major energy dissipation mode. But in the application of more destruction. This article discusses the causes and design of underflow dissipater damage. First, the underflow energy dissipation causes 1. Stills floor elevation is not enough to reduce the submergence can not form a submerged water jump, the downstream erosion occurs, the majority of such damage, mainly in the design of the downstream water level calculation is not accurate. For example, Qingli County Shengli Reservoir drainage canal jumps twice, the design channel slope is 0.5 ‰, bottom width 4m, slope m = 1.5, the actual downstream depth of 1.4m, than the design calculation