桩基透空式导流屏结构对船闸下游口门区通航的影响

摘要

船闸下游引航道口门区水流条件受大坝底孔泄流和泄水闸调峰等影响,易破坏原河道所在区域导流效应,对下游口门区船舶通航不利.提出一种新型导流结构——桩基透空式导流屏,并以五强溪枢纽船闸为例,设计初始及优化两种方案进行水流特性试验和船模试验以测试其工程效果.试验表明该结构形式可较好地改善下游口门区水流条件,且相比于初始方案,优化方案对五强溪枢纽船闸下游口门区水流条件的改善效果更为显著,更利于船舶通航.%The flow condition at downstream gate of ship lock is affected by diversion from bottom and peak of dams,which is easy to destroy the diversion effect of original river channel,and it is disadvantageous to navigation of downstream traffic area.In this paper,a new type of diversion structure,pile foundation through ventilation guide is introduced,and the water flow characteristic test and ship model test are carried out to test the engineering effect by taking Wuqiangxi hub lock as an example,with initial and optimized schemes.The experimental results show that the structure can improve the flow conditions of the downstream port,and the optimized scheme is more effective than the initial scheme in improving flow conditions in the downstream gate area of the Wuqiangxi hub,which is more conducive to ship navigation.