贵港二线船闸输水系统水力特性原型观测

Prototype observation of hydraulic characteristics of filling and emptying system of Guigang Second Line Ship Lock

贵港二线船闸是西江航运干线中的重要通航枢纽,采用简单的闸墙廊道侧支孔出水及双明沟消能的分散输水系统布置型式。为验证输水系统布置及闸阀门运行方式是否合理,对船闸输水系统进行了水力特性原型观测试验。观测结果表明:闸室水力特性及船舶停泊条件基本满足规范及设计要求,船闸进出水口及闸室内流态较好;在当前船闸水头及推荐的阀门运行方式下,输水末期闸室内的超高、降超出了规范要求,改善闸阀门运行方式后,有效降低了惯性水头;船闸原型与模型间流量系数存在偏差,偏差值不超过6%;双线船闸在不同工作时序下运行,相互影响不大。

Guigang Second Line Ship Lock is an important navigation hub in the main shipping line of the Xijiang River.It adopts a simple decentralized filling and emptying system with a layout of gate wall gallery side branch outlet and double open ditch energy dissipation,which is rare in China.In order to verify the reasonable layout of the system and the proper operation mode of the gate valve,and to ensure the safe and efficient operation of the ship lock,the prototype observation test of the hydraulic characteristics of the filling and emptying system was carried out.The observation results show that the hydraulic characteristics of the lock chamber and the berthing conditions of the ship can basically meet the code and design requirements,and the flow patterns at the inlet and outlet of the lock and in the lock chamber are good;and under the current ship lock head and recommended gate valve operation mode,the superelevation and drop in the lock chamber at the end of water conveyance exceed the specification requirements.After putting forward improvement measures for the operation mode of the lock valve,the problem has been improved.There is a deviation in the discharge coefficient between the prototype and the model of the ship lock,and the deviation value does not exceed 6%.The operation of the double-track lock under different working sequences has little influence on each other.