公路隧道洞外生态减光模型试验研究

Research on Properties of Variation of Road Tunnels Access Zone Luminance

隧道照明是为了解决行车的安全性和舒适性问题,但随着大量公路隧道建成通车,隧道照明所带来的能源消耗问题越来越受到关注。相关研究提出对隧道洞口接近段采取必要的减光措施,可有效降低隧道入口段的人工照明亮度,从而达到节约电能的目的。在隧道洞外减光传统结构的基础上,提出新型的洞外生态减光结构,其利用藤蔓进行减光,具有减光效果好、造价低、节约隧道照明用电的优点。通过新型减光结构的模型试验,对顶部不同空隙率的减光效果进行对比分析,确定了减光棚的重要参数配置。研究结果表明：当减光棚顶部的藤蔓空隙率为10% 时,棚下路面照度与棚外路面照度的比值为0.30,基于人的视觉适应曲线,此空隙率的减光效果好。研究成果对于进一步实现隧道的绿色照明意义重大。

Tunnel lighting is for drive safety and comfort, but the energy consumption issues are being paid more and more attention with completions of a large number of highway tunnels. Some studies put forward the necessary dimming measures at the access sections of the tunnel entrance, which can effectively reduce the brightness of the artificial lighting of the tunnel entrance section so as to achieve the purpose of saving energy. In this paper, based on the traditional structure of dimming outside of the tunnel, a new type of ecological dimming structure is proposed, which utilizes vines for dimming, and has the advantages of good dimming effect, low cost and saving tunnel lighting. Through the model test of the new dimmer structure, the dimming effect of the different porosity at the top is compared and analyzed, and the important parameter configuration of the reducing shed is determined. The results show that when the porosity of the vines at the top is 10%, the ratio of the luminance of the pavement under the shed to the pavement illumination out of the shed is 0. 30, and the dimming effect of this porosity is good. The research results are of great significance for further realization of the green lighting in the tunnel.