电站扩机工程对原船闸航行影响船模试验研究

Ship Model Test Study on the Influence of Power Station ExpansionProject on the Navigation of the Original Ship Lock

以湘江近尾洲枢纽船闸扩建工程为例,通过对工程前、后的船模试验数据分析得出了扩机工程对原船闸通航水流条件的影响。扩机工程优化方案基本消除了工程前一线船闸上游引航道中的回流流态,并使得口门区内的纵、横流最大值与工程前相比分别减小了0.23、0.82 m/s;枢纽一线船闸上游航道口门区最大通航流量由工程前的6653 m^(3)/s增加至优化方案中的6963 m^(3)/s,船模试验最不利工况为工况5(Q=12300 m^(3)/s)。优化方案的船模航行效果整体优于原方案,优化方案各流量工况下的平均航速均有所增加。当Q<8200 m^(3)/s时,上、下行最大舵角及最大漂角相对于原方案均有所下降,优化了航道通航水流条件,大大提升了过往船舶的安全系数,但仍要略高于工程前。

Taking the Xiangjiang River Jinweizhou hub ship lock expansion project as an example,the impact of the expansion project on the navigation flow conditions of the original ship lock was obtained by analyzing the ship model test data before and after the project.The optimization scheme of the expansion project basically eliminated the reflux flow pattern in the upstream approach channel of the first-line ship lock before the project,and reduced the maximum longitudinal and transverse flow in the portal area by 0.23 m/s and 0.82 m/s respectively,compared with those before the project.The maximum navigable flow in the upstream channel entrance area of the first-line ship lock of the hub increases from 6653 m^(3)/s before the project to 6963 m^(3)/s in the optimization scheme.The most unfavourable working condition of ship model test is working condition 5(Q=12300 m^(3)/s).The ship model navigation effect of the optimized scheme is better than that of the original scheme in whole,and the average navigation speed of the optimized scheme under various flow conditions has increased.When Q<8200 m^(3)/s,both the maximum rudder angle and maximum drift angle of the upstream and downstream have decreased compared to the original scheme,which optimizes the navigable flow conditions of the channel and greatly improves the safety factors of passing ships,but still slightly higher than that before the project.