针对紊流性泥石流特点，对渡槽的受力情况进行了比较深入的分析。在垂直于渡槽边壁方向，泥石流体对渡槽的总作用力由紊流性泥石流体对渡槽结构的全压力和紊流性泥石流体中砂石垂直于边壁冲击力组成；在平行于渡槽边壁方向，泥石流体对渡槽的作用力由公式（10）及（11）来表示。最后对这些公式的应用和一些极限情况进行了讨论，为渡槽的设计提供了理论和实践上的依据。

This paper firstly makes an introduction to turbulent debris flow(rare debris flow)destroying drainage canal, then simply summarizes the characteristics of the turbulent debris flow; thirdly deeply analyses drainage canal being done force from two directions:one is vertical to drainage canal wall, the other is equal to drainage canal wall, furthermore obains ten formulas. For this reason, designing basis for drainage canal is provided.

P642.23 TV672.3

四川省交通厅重点科技和交通部重点科技资助项目 ( 95 -0 6 -0 2 -33)