导流墩对急弯河道下游口门区水流条件的改善作用

Improvement effect of diversion pier on flow conditions in downstream entrance area of sharp bend channel

针对口门区通航水流条件影响船舶航行安全的问题,根据急弯河道下游口门区特征建立概化数值模型,从导流墩数量、布置角度和相对间距3个因素对船闸下游口门区通航水流条件的影响展开研究。依托位于急弯河道的航电枢纽建立二维数学模型,对导流墩布置规律进行验证。研究结果表明,合理布置导流墩可以较大程度改善口门区水流条件,适当增加导流墩数量且当导流墩间距与长度等长时通航水流改善效果较强。导流墩布置方向与航线平行时,水流条件较优。

The navigable flow conditions in the entrance area affect the navigation safety of ships.Hence,this study constructs a generalized numerical model according to the characteristics of the downstream entrance area of the sharp bend channel.It explores the influence of the number,the arrangement angle,and the relative spacing of diversion piers on the navigable flow conditions in the downstream entrance area of the ship lock.In addition,it builds a two-dimensional mathematical model on the basis of the navigation and power junction located in the sharp bend channel to verify the arrangement laws of diversion piers.The results show that reasonable arrangement of diversion piers can greatly improve the flow conditions in the entrance area.When the number of diversion piers is increased appropriately,and the spacing and length of diversion piers are equal,the improvement effect on navigable flow is more prominent.When the direction of diversion piers is parallel to the route,the flow conditions are better.