阶梯溢洪道大单宽流量的水流特性及消能效果

Characteristics and Effect of Energy Dissipation of Water Flowin Large Unit Width Discharge of Stepped Spillway

溢洪道─宽尾墩─斜坡加糙─台阶─"Ｔ"型墩消力池联合消能工的试验研究表明，溢洪道（溢流坝）作成阶梯形状后，并与掺气减蚀措施相结合应用，在大单宽流量下，消能显著。由于阶台坝面掺气基本上可以减免空蚀，减轻冲刷，因此是一种较好的新型消能工。

The experiment of combined energy dissipation of spillWay, wide tail abutment, roughenedslope, stage and tee plunge pool shows that when steppd spillway is constructed and measures of decreasedabrasion are taken in large unit width discharge, the energy dissipation is remarkable. As the surface ofstepped dam is aerated, cavitaion abrasion can be removed and washing can be decreased, therefore, it's anew type of better energy dissipation.