万安枢纽二线船闸上游通航水流条件优化试验研究

Optimization test on navigable flow conditions of upstream at Wan an second ship lock

在原有船闸基础上扩建多线船闸时,须考虑新建船闸对已有船闸引航道及口门区通航水流条件的影响,如布置和运行控制不当,极易导致相关安全问题。建立1100的万安枢纽及船闸引航道物理模型进行试验,研究万安二线船闸修建前、后上游口门区及停泊段通航水流条件,并结合试验结果及地形条件,提出引航道口门区优化布置方案。结果表明,原设计方案中,二线船闸建成后,其上引航道口门区及靠船墩在部分工况下水流条件不满足通航要求,且一线船闸上引航道口门区及靠船墩处的水流条件相对于二线船闸未建前变差;优化布置方案中,二线船闸上引航道口门区水流条件在各工况下均满足通航要求,一线船闸上引航道口门区及靠船墩处水流条件优于二线船闸未建前情形。

It is important to consider the effect of the navigable flow condition when a newly ship lock is built beside the existing ship lock.An unreasonable layout of ship locks may lead to safety problems during operation.We carry out a physical model test with the scale of 1100 to study the navigable flow conditions of the upstream entrance area and berthing section before and after the construction of Wan an second ship lock,and propose the optimized layout scheme of the entrance area of the approach channel based on the test results and terrain conditions.The results show that the flow conditions of the second ship lock near the entrance and piers in original design scheme exceed the standard,and the flow conditions of the first ship lock are worse than the situation before the second ship lock is built.The flow conditions of upstream at second ship lock in all conditions of optimized scheme meet the requirements,and the flow conditions of the first ship lock are better than that before the second ship lock is built.