带中间渠道船闸运转方式的试验研究

带中间渠道的分散梯级船闸是高坝通航建筑物的布置型式之一,它具有调度灵活、通过能力大等特点。但其上下级船闸采用不同运转方式时,所产生的非恒定流水流条件十分复杂,严重时将影响船舶(队)停泊和航行条件,还会对船闸运转及人字闸门产生不利影响。通过1:40的水工概化模型试验,对断面为规则的矩形中间渠道进行了上下级船闸单独、同时与错时灌泄水3种运转方式渠道内的水力特性研究,否定了船闸同时运转方式;对渠长2 000 m和1 400 m在特定条件下的船闸错时运转方式,找出了最佳错开时间;对3种运转方式的水力要素进行综合对比后,最终推荐采用先泄后灌运转方式。

Study on run mode of upper and lower lock with intermediate channel

Distributed navigation steps with intermediate channel is one layout style of high dam navigation structure.Its characteristic is dispatching flexible and traffic capacity larger,etc.But when upper and lower lock running with different mode,filling and emptying system interacting,the current in intermediate channel is very complex.It has effect on berthing and navigation conditions of ship(fleet) and has bad effect on lock run mode and miter lock gate.By means of the physical model test with the scale of 1:40,under the condition of single filling and empty and simultaneous service and stagger running,the hydraulic characteristics in the intermediate channel of regular rectangle between two ship locks are studied.The simultaneous service is denied.Under the specified conditions,the optimal stagger time is found out for channel length of 2 000 meters and 1 400 meters.Compared with the hydraulic characteristics of three run modes comprehensively,the run mode of filling after emptying is recommended finally.