公路隧道洞外亮度时变特性研究

摘要

对于隧道入口段照明设计而言,洞外亮度是一个关键参数.由于受隧道洞门形式和走向、太阳辐射强度和照射角度等因素的影响,洞外亮度并不是一个定值,而是随着季节和时间变化的,故目前业界对隧道洞外亮度的时间变化特性缺乏相应的研究.结合不同隧道洞口朝向,分析几种典型天气下隧道洞外亮度随时间的变化规律,其对于隧道入口段照明设计和运营控制以及洞外减光设计具有参考价值.%For tunnel entry lighting design,the outside brightness is a key parameter. Due to the influence of factors such as the form and direction of the tunnel,the intensity of the solar radiation and the angle of exposure,the brightness at the tunnel opening is not a fixed value,it is variable with season and time,the industry lacks related study on time variation characteristics of tunnel opening lighting at present. This paper,in combination with different tunnel opening directions, analyzed rules of tunnel opening lighting variation with time under several typical climates. It can be reference for tunnel entrance lighting design, operation and tunnel end lighting reduction design.