平原城市隧道洞外环境比实测及洞外亮度研究

Measurement of Outside Environment Ratio and Study on Ambient Exterior Luminance of Plain City Tunnels

隧道洞外亮度L2(0S)是隧道照明设计所考虑的一个最重要的基本参数。只有准确掌握了洞外亮度情况,才能结合隧道土建参数进行科学的照明设计。我国公路隧道洞外亮度L2(0S)选取时,天空面积百分比一般为0。平原城市隧道由于其自身特点,隧道洞外环境比例与公路隧道有所差别,天空比也不一定为0,因此设计阶段很难准确确定洞外亮度。结合郑州某城市隧道洞外环境实测数据,研究隧道洞外天空、墙面、绿化及洞内等各环境要素比例,并采用查表法和环境简图法验证原设计洞外亮度取值与相关规范的贴合度,同时给其他城市隧道照明设计提供指导意见和基础数据。

Tunnel ambient exterior luminance L20(S)is one of the most important basic parameters in tunnel lighting design. Only when the Tunnel ambient exterior luminance is accurately grasped, can the scientific lighting design be carried out in combination with the civil parameters of the tunnel. When L20(S)is selected for highway tunnel, the percentage of sky area is generally 0. Because of its own characteristics, the proportion of environment outside the tunnel is different from that of highway tunnel, and the sky ratio is not necessarily 0.So, it is difficult to accurately de. termine L20(S)in the design stage. In this study, based on the measured data of the environment outside a tunnel in Zhengzhou, the proportion of the environmental factors such as the sky outside the tunnel, the wall, the greening and the inside of the tunnel was checked and calculated. And checking table method and environmental sketch method were used to verify whether the original design value of outside brightness was in accordance with the relevant specifi. cations. At the same time, it provided guidance and basic data for lighting design of other urban tunnels.