航道边线与桥墩之间安全距离的研究

合理地确定通航桥梁的最小净空宽度,保证船队航行和桥梁安全,是桥梁建设和航道建设均应重视的问题。文章提出了计算通航桥孔宽度的计算公式。当桥梁轴线的法线方向与水流方向的偏角超过5°时,通航桥孔净空宽度应在一般航道宽度的基础上增加考虑水流产生的船舶横向漂移,并在桥墩和航道边线之间留有足够的安全距离。利用PIV技术,获得桥墩周围流场的准确信息,从水流紊动的角度,提出了安全距离的确定方法。

Safe Distance Between Channel Sideline and Bridge Pier

To ensure the safety of navigation and bridge, it should be considered to calculate the minimum navigable clearance dimensions of bridge in bridge construction and channel construction. The calculation formulae of navigable bridge span were presented. When the angle between the normal orientation of bridge axes and flow direction excess 5 degrees, besides the common channel width the transverse excursion of ship and the safe distance between sideline and bridge pier shall also be considered. By applying PIV technique, accurate velocity fields around the bridge pier are obtained. This paper sets forth the determination method for the safe distance from the point of turbulent flow.