Abstract:The construction level of the Xinglong Hub Second Line Ship Lock is Grade II,with the effective scale of 300 m×34 m×5.6 m and maximum design water head of 13.73 m.It belongs to the medium head large ship lock,with the maximum water transport volume of 155,000 m3?at a time.This article adopts a decentralized water supply system with gate walls,long corridors,and side support holes.There are currently few engineering examples of using a gate wall long corridor side branch hole filling and emptying system for such a water transmission scale.It is necessary to carefully study whether this filling and emptying system can ensure the safe and efficient passage of ships under such a water transmission scale.With the help of engineering examples,a three-dimensional hydrodynamic mathematical model is used to study the hydraulic characteristics,gallery pressure,and gate chamber parking conditions of the side branch hole water delivery system of the gate wall corridor.The results indicate that the Xinglong Second Line Ship Lock is feasible to use the filling and emptying system with gate walls long corridors and side support holes.All hydraulic characteristic indicators of water transmission meet the design and specification requirements.The water flow conditions during the transfer of water in the lock chamber meet the requirements for safe passage of ships,and the water delivery time can be controlled within the 12 minute range required by the design.
