Taking the Huangtatao Expressway and the Liuwu Expressway under the Anhui Provincial Transportation Investment Group Co., Ltd. as an example, the problem can be fully explained.
The Huangtatao (Huangshan-Taling and Xiaohe-Taolin) expressway in Anhui Province is an important part of the National Highway (G3) Expressway and the Hangrui (G56) Expressway. The total length of the route is 51. 3km. 5km且15. 3km。 The starting point to the Xiaohe section length of 17. 5km, the two-way six lanes, the design speed of 100km / h, the roadbed width of 33. 5m; Xiaohe to Taolin and Xiaohe to Taling two sections are 18.5km and 15. 3km 5米。 The two-way four lanes, the design speed of 80km / h, the roadbed width of 24. 5m.
A total of 15 tunnels were set up in the whole line. The total length of the single hole was 28. 3km, accounting for 27.6% of the whole line. If high-pressure sodium lighting system is used, the total power of tunnel lighting fixtures will reach 2,076 kW, the daily electricity consumption will be about 21,000 yuan, and the annual electricity consumption will be about 75.8 million yuan.
The Liuwu Expressway in Anhui Province is an important section of the newly planned Hu Hanrong Expressway (G42). The total length of the route is 90. 9km, which is a two-way four-lane design with a designed speed of 100km/h and a subgrade width of 26m.
A total of 8 tunnels were set up in the whole line. The total length of the single hole was 18.4km, accounting for 10.1% of the whole line. If high-pressure sodium lighting system is used, the total power of tunnel lighting fixtures will reach 1734kW, the daily electricity consumption will be about 17,000 yuan, and the annual electricity consumption will be about 63.30 million yuan.
How to respond to the national call for energy conservation and emission reduction, and maximize energy conservation in tunnel lighting is an urgent problem to be solved in the construction and operation of mountain highways.
1 tunnel energy-saving lighting method
At present, the lamps used in tunnel lighting have high-pressure sodium lamps, fluorescent lamps, high-frequency electrodeless lamps, and LED lamps. Among them, the high-pressure sodium lamp and the fluorescent lamp are based on gas discharge, and the electrodeless lamp is based on a combination of gas discharge and high-frequency electromagnetic induction, and the LED (Light Emitting Diode) is a semiconductor light-emitting diode based on injection electroluminescence.
High-pressure sodium lamp is the main lamp used in highway tunnel lighting in China. However, the new LED lamp has the remarkable advantages of high efficiency, energy saving, long service life, convenient maintenance, wide working voltage range, low working temperature and green environmental protection. It is a powerful competitive product for highway tunnel lighting. Internationally, single-chip high-power white LEDs have matured in technology and standards, and lamps that use them as light sources are mainstream products on the market. 
The results of this survey and comparison were limited to this type of luminaire (Table 1).
2 LED energy-saving lighting integration technology
Road tunnel lighting energy-saving technology should reflect integration and originality, focusing on the three links of “environmental energy conservation, mode energy conservation, and energy conservation controlâ€.
(1) Control internal and external environments to achieve basic energy conservation. First, the grasp of the environment outside the cave requires the measurement of the brightness outside the tunnel, the development of external light reduction measures, the verification of the external brightness of the hole after completion, the targeted lighting design and the design correction before implementation, and the effective control of tunnel lighting energy conservation. The outside of the hole. The second is the creation of the environment inside the cave. It is required to combine the interior decoration of the cave and adopt high-reflective materials and self-illuminating materials on the coating in the hole in a segmented manner to achieve a perfect combination of function and form.
(2) Optimize the lighting mode to achieve energy savings at the core layer. Including the choice of illumination source (high-pressure sodium lamp, high-frequency electrodeless lamp, LED lamp, etc.), the choice of lighting mode (tunnel length ≤100m, ≤300m, ≤1000m, >1000m, "no lighting, induced lighting , the standardization of lighting, etc.), the choice of lighting parameters.
(3) Establish a control system to achieve high-end energy conservation. In view of the influence of the brightness outside the hole, the traffic volume in the hole and the speed of the tunnel on the brightness of the hole, the in-hole lighting control system is intended to be stepless control based on the brightness outside the hole and the classification based on the traffic volume and driving speed in the hole. Control composition.
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