实测确定公路隧道洞外景物亮度的方法
Method obtaining scenery luminance outside tunnel portals with in-situ testing

分析比较了查表法、环境简图法和黑度法3种确定洞外亮度的方法,发现3种方法均未完全考虑隧道所处区域的环境和光气候条件。为了能快速准确地确定隧道洞外景物亮度,以从莞高速公路的7座隧道为测量对象,通过现场实测,建立了洞外景物亮度与水平面照度之间的关系。在对当地光气候数据进行统计分析的基础上,确定隧道洞外景物亮度标准值、东莞地区隧道洞外典型景物亮度设计参考值,并得到了东莞地区4个朝向隧道洞外典型景物亮度值。
Three methods used to determine luminance at tunnel portals were analyzed and compared. The three methods were look-up table method, environment diagram method and blackening method. But these methods didn't fully consider the regional environment of tunnel and luminous climate. In order to rapidly and accurately determine scenery luminance at tunnel portals, measurements were conducted in seven Congguan highway tunnels. Based on the onsite measurements, the relationship between scenery luminance at tunnel portals and horizontal illuminance were established. Statistical analysis on local light climate data were carried out to confirm standard value of luminance at tunnel portals LS and the design reference value of typical scenery luminance at tunnel portals in Dongguan. And typical scenery luminance values of four towards in Dongguan area could be determined.