碾盘山船闸输水系统设计与试验研究

Design and test study on filling and emptying system of Nianpanshan lock

碾盘山船闸等级为Ⅲ级,最大设计水头14.2 m,属于中水头大型船闸,根据类似工程相关经验,船闸采用闸墙长廊道侧支孔分散输水系统,推荐阀门开启时间为6 min,输水系统以及阀门开启时间选用是否合理直接影响水流及船舶停泊条件。通过水力特性计算并结合1:15物理模型,对输水系统水力特性、廊道压力、闸室停泊条件进行分析。结果表明,碾盘山船闸采用闸墙长廊道侧支孔输水系统是合理的,设计的阀门开启时间下各项输水水力特征指标均能满足设计和规范要求。

Nianpanshan lock is identified as Grade Ⅲ,with a maximum design head of 14.2 m,belonging to a large medium-head lock.According to relevant project experience,the long-corridor filling and emptying system with side branch holes inside the lock wall is adopted.The recommended valve opening time is 6 min.The filling and emptying system and valve opening time directly affect the water flow and berthing conditions.Through the hydraulic calculation and 1:15 physical model,the hydraulic characteristics of the filling and emptying system,corridor pressure,and the berthing conditions of the lock chamber are analyzed.The results show that the adopted system is reasonable,and the hydraulic characteristic indexes under the designed valve opening mode can meet the requirements of design and codes.