Study On The Optimal Layout Of Lamps And Intelligent Dimming For Energy Saving In Extra-long Highway Tunnel

With the continuous advancement of highway construction in China,the development of highway tunnels has entered a significant growth period,especially the development of extra-long highway tunnel,the growth rate of the number has been significantly higher than the overall growth rate of highway tunnel.The increase of tunnel number and mileage means that the scale of lighting facilities will become particularly large,and the resulting lighting costs and management and maintenance costs are also rising.In this context,how to create a safe,efficient,energy-saving and environmental protection of extra-long highway tunnel lighting system has become an urgent problem to be solved in the construction,which has great economic and social benefits.Based on Dawanshan extra-long highway tunnel,this paper makes a systematic and detailed study on the optimal layout technology and intelligent dimming method of lamps in extra-long highway tunnel by using the research methods of data investigation,theoretical analysis,simulation,field experiment and numerical calculation.The results are as follows1.By using the method of theoretical analysis and simulation,the optimal layout technology of highway tunnel lamps is deeply studied.The optimal installation parameters of highway tunnel lamps are obtained when the center line is offset,the two sides are staggered and the two sides are symmetrical.The optimal layout form of lamps is proposed,and the influence of lamp power and spacing on tunnel lighting quality is explored.2.By means of theoretical analysis,field experiment and simulation,this paper studies the lighting effect of only lamp and the superposition of lamp and lamp,reveals the variation law of different types of lamps on the road lighting brightness in front,and explores the driver’s visual resolution range of obstacles under only lamp lighting,The lighting effect of superposition of lamp and lamp in the dynamic process of driving is proved.3.The traffic flow characteristics of highway tunnel and the time-varying law of brightness outside the tunnel are investigated and mastered,the grading method of highway tunnel lighting circuit based on time sequence control is established,and the energy-saving benefits of the grading control method before and after lamp layout optimization are analyzed.4.The mathematical model of intelligent dimming based on neural network algorithm is built by using numerical calculation method.The influence of vehicle speed,traffic volume and brightness outside the tunnel on intelligent dimming of highway tunnel lighting is explored,and the energy-saving benefits of intelligent dimming control technology of highway tunnel lighting are analyzed.The above research results will not only be applicable to the Dawanshan extra-long highway tunnel,but also have important reference value for the lighting energy-saving control of other highway tunnels.