湘江湘祁枢纽船闸下游引航道口门区通航水流条件影响及对策

Influence of navigable flow conditions and countermeasures at entrance area of downstream approach channel of ship lock in Xiangqi Junction on the Xiangjiang River

湘江湘祁枢纽二线船闸是在已有建筑物岸侧增建的二线船闸,造成二线船闸引航道与主航道曲线连接。因一线船闸引航道的限制,且一线船闸与二线船闸轴距较短,使得拟建二线船闸上下游口门区及连接段通航水流条件较为复杂。因此,依托湘祁枢纽二线船闸扩建工程,采用1100定床水流物理模型试验,分析双线船闸下游引航道口门区通航水流条件。对泄水闸开启方式优化、二线船闸下游引航道隔水堤优化、电站下游右岸大堤优化、电站出流口下游河道局部疏浚等系列措施开展试验研究,提出了改善通航水流条件的优化措施。

The second-line ship lock of the Xiangqi Junction on the Xiangjiang River is an additional second-line ship lock on the shore of existing buildings,resulting in a curved connection between the approach channel of the second-line ship lock and the main channel.Due to the limitation of the approach channel of the first-line ship lock and the short wheelbase between the first-line ship lock and the second-line ship lock,the navigable flow conditions in the upstream and downstream entrance areas and connecting sections of the proposed second-line ship lock are relatively complicated.Therefore,relying on the expansion project of the second-line ship lock of the Xiangqi Junction,we conduct a 1100 fixed-bed physical model test on flow to analyze the navigable flow conditions at the entrance area of the downstream approach channel of ship locks.A series of experimental studies are carried out on the optimization of the opening method of the sluice lock,the optimization of the dike of the downstream approach channel of the second-line ship lock,the optimization of the embankment on the right bank downstream of the power station,and the local dredging of the river channel downstream of the outlet of the power station.Moreover,optimization measures are proposed to improve the navigable flow conditions.