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高速公路防眩高度确定方法

2017-01-13赵锡森吴金海彭余华王江红

筑路机械与施工机械化 2016年12期

赵锡森吴金海彭余华王江红段华勇

文章编号:1000033X(2016)12007907

收稿日期:20160609

基金项目:云南省交通运输厅联合攻关科技项目(云交科教[2016]56号)

摘要:为了解决高速公路夜间行车时普遍存在的强光炫目问题,通过分析车辆前照灯、驾驶人视线和防眩板设置高度在道路横纵断面上的投影关系,构建相应的计算模型,从而提出包含前后纵坡的凹形竖曲线路段防眩高度计算方法,与基于不同高速公路设计标准和位于中线与中央分隔带两侧的2种设置情形下的直线段最小防眩高度,以及不需增加防眩高度的凹形竖曲线半径临界值查询表,可为相关施工提供借鉴。

关键词:防眩板;几何模型;防眩高度;设置位置

中图分类号:U412.36文献标志码:B

Determination of Antiglare Height of Expressway

ZHAO Xisen1, WU Jinhai2, PENG Yuhua3, WANG Jianghong3, DUAN Huayong1

(1. Zhaotong Dashanbao Highway Construction Headquarters, Zhaotong 657000, Yunnan, China;

2. China Road and Bridge Corporation, Beijing 100011, China; 3. School of Highway, Chang an University, Xian 710064, Shaanxi, China)

Abstract: In order to resolve the problem of glare that is ubiquitous when driving at night on expressway, the projection relationship on cross section between vehicle headlamp, drivers line of sight and the height of antiglare plate was analyzed ,and related calculation model was built. The calculation method of antiglare height of concave vertical curve section including longitudinal slope was proposed. Minimum antiglare height for straight line segments based on different highway design standards and two settings on both sides of the center line and center divider and lookup table for critical value of the radius of concave vertical curve without increasing of antiglare height, provide reference for similar projects.

Key words: antiglare plate; geometric model; antiglare height; setting location

0引言

目前,高速公路的桥梁路段以及由于过窄、干旱缺水等原因而难以植树的中央分隔带广泛采用防眩板来解决夜间对向行车的车灯强光眩目问题。《高速公路交通工程及沿线设施设计通用规范》(JTG D80—2006)(以下简称《规范》)规定直线路段防眩高度应为1.60~1.70 m,平、纵线形组合路段防眩高度应为1.20~1.80 m;《公路交通安全设施设计细则》(JTG/T D81—2006)(以下简称《细则》)建议防眩设施的高度不宜超过2 m。实践表明,在平直线路段按照规定的1.60~1.70 m高度设置防眩板仍存在上侧漏光问题,而在凹形竖曲线路段,处于高处的车前灯光高度亦会超过凹面路段较低处防眩板高度而造成眩光。

目前,国外道路防眩的研究大多是分析眩光对交通安全的影响,并从光源体、传播路径及受光体3方面采取措施削弱眩光影响。……

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