高速公路凹形竖曲线路段防眩设施高度计算及应用

Height Calculation and Application of Anti-glaring Facilities at the Concave Vertical Curve Section of Expressway

为有效解决防眩设施统一高度在凹形竖曲线路段存在的交通安全隐患,从最不利车道与车型组合角度出发,根据发出眩光车辆、防眩设施位置、受眩光影响车辆3点是否在凹曲线内,建立了一般意义下的凹曲线防眩设施高度计算模型,并推导出防眩高度计算表达式。研究结果表明,凹形竖曲线路段及其前后一段距离内防眩高度比平直路段高,应按修正值进行高度设计。

For the purposes of section under uniform height of anti- effectively tackling the potential traffic dangers at the concave vertical curve glaring facilities, this paper built a height calculation mode of anti-glaring facilities in general sense and deduced accordingly its height calculation formula by incorporating the most unfavorable lane with type of vehicles to check whether the glaring vehicle, the glaring facilities and the affected vehicle lied in the same concave curve. The findings showed that height design should be done by use of the cor- rected value as the anti-glaring and back were higher than that height at the concave vertical curve section and a certain distance from its front of horizontal ones.