溢洪道差动式挑流鼻坎挑距和冲深特性探讨

Discussion on Characteristics of Flip Nappe Distance and Scour Depth of Spillway Differential Flip Bucket

溢洪道差动式挑流鼻坎可明显增加挑射水流在空中的碰撞、紊动和掺气,大大减轻下游河床的冲刷。根据部分溢洪道工程的水工模型试验资料,对差动式挑流鼻坎挑射水舌挑距及其下游河床冲刷坑深度的估算方法进行分析和探讨,可供类似工程设计和运行参考。

Differential flip bucket of spillway can significantly increase collision、turbulence and aeration of jet flow in the air,thus greatly reduce scour depth of the downstream river bed.In this paper,according to some spillway engineering hydraulic model test data,analysis and discuss for the estimation method of the flip nappe distance of jet flow and the scour depth of the river bed.The study results would be of referential value for other engineering design and operation.