顺直航道矩形桥墩防撞范围的确定方法研究

Determination Method of Anti-collision Area of Rectangular Bridge Pier in Straight Waterway

桥墩的防撞范围与桥区的航道布置密切相关,因此有必要研究桥墩的防撞范围。运用数值模拟和回归分析方法,研究了顺直航道矩形桥墩防撞范围的确定方法,并推导出了顺直航道矩形桥墩防撞范围的经验计算公式。结果表明:顺直航道矩形桥墩的防撞范围与桥墩的特征宽度呈线性关系,与桥墩附近的水流流速呈幂指数关系,且桥墩的特征宽度越大,桥墩的防撞范围越大,桥墩附近的水流流速越大,桥墩的防撞范围也越大。

The anti collision area of bridge pier is closely related to the fairway layout in bridge area, so it is necessary to study the scope of anti collision area of the pier. This paper uses numerical simulation and regression analysis method to study the method to determine the scope of the anti collision area of rectangular bridge pier,and derives an empirical formula. Research results show that rectangular pier anti collision area in straight channel has a linear relationship with bridge pier＇s characteristic width,and also has an exponential relationship with fairway＇s flow velocity; the anti collision area increases with the increase of bridge pier＇s characteristic width and fairway＇s flow velocity.