Calculation method of anti-glare plate height on concave vertical curve section
Article Text (Baidu Translation)
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摘要: 分析了平直路段和凹形竖曲线路段眩光、驾驶人视线与防眩板高度的关系, 考虑凹形竖曲线路段半径、汽车前照灯高度、驾驶人视线高度、路段横断面结构和中央分隔带宽度等参数, 提出了凹形竖曲线路段防眩板高度计算方法。以京化高速公路防眩板设计高度为例进行实例验证, 并将计算结果与《公路交通安全设施设计细则》(JTG/T D81—2006)规定的计算结果进行对比。研究结果表明: 当汽车前照灯的灯距为120 m, 凹形竖曲线路段半径在12 000~32 000 m时, 按照现有规范, 防眩板设计高度为1.712 m, 按照提出的方法, 防眩板最小设计高度为1.720 m, 防眩板最大设计高度为1.800 m。Abstract: The relationships among glare, driver sight and anti-glare plate height on straight section and concave vertical curve section were analyzed. The parameters such as the radius of concave vertical curve section, car headlamp height, driver sight height, cross-section structure and medial divider width were considered, and the calculation method of anti-glare plate height on concave vertical curve section was put out. The design height of anti-glare plate on Jinghua Expressway was taken as a case, the example verification was carried out, and the calculation results of the proposed method and Guidelines for Design of Highway Safety Facilities(JTG/T D81—2006) were compared.Research result shows that when the lamp distance of car headlamp is 120 m and the radius of concave vertical curve section is 12 000-32 000 m, the design height of anti-glare plate is 1.712 m by using the existing specification.By using the proposed method, the minimum design height of anti-glare plate is 1.720 m and the maximum design height of anti-glare plate is 1.800 m.
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图 1 不同线形条件下防眩板高度
Figure 1. Anti-glare plate heights under different alignment conditions
表 1 驾驶人视线高度和汽车前照灯高度
Table 1. Driver sight heights and car headlamp heights
车型 前照灯高度/m 视线高度/m 大型车辆 1.00 2.00 小型车辆 0.80 1.30 
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表 2 防眩板高度计算结果
Table 2. Calculation results of anti-glare plate heights
序号 变坡点桩号 凹形竖曲线半径/m 原设计防眩板高度/m 计算防眩板高度/m 推荐防眩板高度/m 1 K0+430.000 18 400 1.712 1.750 1.750 2 K1+230.000 28 307 1.712 1.720 1.720 3 K2+450.000 12 000 1.712 1.800 1.800 4 K4+127.105 12 000 1.712 1.800 1.800 5 K5+887.600 25 000 1.712 1.730 1.730 6 K6+987.600 20 000 1.712 1.750 1.750 7 K7+987.600 12 000 1.712 1.800 1.800 8 K11+205.402 25 000 1.712 1.730 1.730 9 K13+677.600 25 000 1.712 1.730 1.730 10 K14+227.600 20 000 1.712 1.750 1.750 11 K15+657.600 25 000 1.712 1.730 1.730 12 K17+817.600 12 000 1.712 1.800 1.800 13 K18+817.600 18 000 1.712 1.750 1.750 14 K19+767.600 13 500 1.712 1.780 1.780 15 K24+117.600 20 000 1.712 1.750 1.750 16 K25+367.600 20 000 1.712 1.750 1.750 17 K26+217.600 15 000 1.712 1.770 1.770 18 K27+917.600 20 000 1.712 1.750 1.750 19 K29+368.215 16 000 1.712 1.760 1.760 20 K31+212.030 25 000 1.712 1.730 1.730 21 K33+597.600 32 000 1.712 1.720 1.720 22 K41+297.600 30 000 1.712 1.720 1.720 23 K43+497.600 25 000 1.712 1.730 1.730 24 K45+017.600 13 913 1.712 1.780 1.780 25 K45+567.600 30 000 1.712 1.720 1.720 26 K53+237.600 17 000 1.712 1.760 1.760 27 K56+497.600 18 545 1.712 1.750 1.750 28 K57+617.600 17 126 1.712 1.760 1.760
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