城市隧道照明调光控制参数特征分析

ANALYSIS OF INFLUENCING FACTORS OF DIMMING CONTROL ON URBAN TUNNEL

采用改进的环境简图法,对浙江地区多条城市隧道洞外亮度进行测量,并结合当地交通流实测数据,分析城市隧道照明调光控制基准参数的长序列变化特征。实测结果表明,相比于公路隧道,城市隧道洞口天空面积百分比普遍>30%,因此L_(20)(S)明显高于规范建议值,且天空面积百分比每增大1%,L_(20)(S)设计值应提升约30 cd/m^2。相比于公路隧道,城市隧道车流量更高,且存在独特的早、晚双峰分布;同时,日间平均车速更低,但日间车速峰谷差值更大。相比于公路隧道,城市隧道照明需求受L_(20)(S)变化的影响更大,而Vt和N的影响则较为有限。

Dopting the improved environment diagram approach,the access zone luminance of several urban tunnel openings is measured in Zhejiang,and the long-sequence characteristics of the reference parameters of the lighting dimming control in urban tunnels were analyzed based on the measured data of the local traffic flow.The results show that,compared with road tunnels,the percentage of sky area in urban tunnel openings is generally above 30%,so L20(S)is obviously higher than the recommended value from the code.And for every 1%increase in sky area percentage,the L20(S)design value should raise about 30cd/m2.Compared to the road tunnels,the traffic volume of urban tunnels is higher,and there is a unique bimodal distribution of the morning and evening.At the same time,the average speed is lower during the day,but the difference between the peaks and valleys is greater during daytime.Compared to the road tunnels,the lighting demand of urban tunnels is more affected by the change of L2(0 S),while the impacts of vt and N are limited.