水垫塘底板缝隙中脉动压力传播特性

Study on Fluctuating Pressure Transmission in Joint on the Bottom of Plunge Pool

高坎下游泄洪常常采用水垫塘消能 ,挑跌水流可能对塘底产生巨大的冲击。如果底板止水破坏 ,冲击压力在缝隙中形成强烈的脉动压力是底板失稳破坏的重要因素。利用瞬变流理论 ,揭示了底板缝隙中脉动压力形成条件和传播特性 。

The plunge pool is usually used to dissipate energy under high dam.Large impact force will cause strenuous fluctating pressure in joint of the phunge pool on the condition of the waterstops damaged.Research shows that fluctuating pressure is one of the primary reasons leading to instability of slab.In this paper,using model of transient flow,condition and characteristics of produced fluctuating pressure in joint were studied.These results are a good help for analyzing the mechanism of fluctuating uplift and instability of concrete slab.