界牌枢纽船闸引航道优化设计

Optimization design of approach channelfor ship lock of Jiepai hydro-junction

针对界牌枢纽改建船闸工程上、下游引航道口门区横流超标的问题,通过调整引航道分水墙长度与挂板高程,通过水流条件试验,得到合理可行的引航道平面优化布置方案;针对下游引航道地质条件突变、原设计采用的混合式结构不再适用的问题,通过进行重力式结构与重力墩+挂板结构的经济技术比选,确定更改方案。结果表明,重力式结构的抗船舶撞击能力强且施工简单,增加投资略高,可作为推荐方案。

In view of the excessive speed of cross-flow in entrance area of the approach channel of ship lock reconstruction in Jiepai junction project,we adjust the length of water diversion wall and the elevation of hanging plate,apply flow condition test to obtain a reasonable and feasible general layout optimization scheme of approach channel.Aiming at the problem that the geological condition of the downstream approach channel changes and the mixed structure used in the original design is no longer applicable,we carry out the economic and technological comparison between the gravity structure and the gravity pier+hanging plate structure,and determine the changed scheme.The results show that the gravity structure has strong anti ship impact ability,simple construction and slightly higher investment,which can be used as the recommended scheme.