双线船闸共用下游引航道水流特性及其影响

Flow characteristics and effects on the approach channel during the co-operation of the double-lane shiplock

双线船闸共用引航道时,船闸灌泄水在引航道内产生的非恒定流较单线船闸情况更复杂,对引航道通航水流条件影响更大.通过数学模型对双线船闸共用下游引航道时引航道内的水流特性进行计算,通过对双线船闸同步同时泄水、双线船闸错开泄水和不同旁侧泄水流量比例等工况的计算结果进行分析,得出了双线船闸错开泄水相对时间要求和旁侧泄水流量比例要求等结论,同时认为:现规范中引航道水深要求略显偏小,可供相关设计和规范修编参考.

The unsteady flow by filling and emptying in the shared approach channel in a double-line shiplock is more complicated than that in a single-line shiplock, which and makes more influence to the navigation flow condition. In the situation of a shared ap- proach channel in a double-line shiplock,the flow characteristics in the downstream approach channel during emptying are calculated using mathematical model. Analysis has been made to the calculation results in the cases of synchronous and simultaneous emptying of the double-line shiplock, the unsynchronized emptying of the double-line ship- lock,and different lateral emptying flow ratios etc., which can meet the relative time re- quirements for unsynchronized emptying,and the ratio requirements for the lateral emp- tying flow in the double-line shiplock. Based on the analysis, and as the reference of complying certain designs and technical codes, it is considered that the requirement by the current code for the water depth of the approach appears relatively less.