1. Tunnel lighting design principles
(1) Tunnel lighting meets the requirements of normal traffic operation of the tunnel and fire protection in the event of an accident, and general lighting and emergency lighting are provided.
The lighting level shall not be lower than the provisions of the "Code for Design of Ventilation and Lighting of Highway Curling Roads".
(2) Lighting equipment and control methods are convenient for operation management
(3) The tunnel lighting method adopts the light beam type, and the natural light transition and artificial light transition mixed transition areas are set at the entrance and exit sections of the tunnel.
2. Tunnel lighting standards
Including: basic lighting, entrance section lighting, transition section lighting, exit section lighting, should lighting, outside approach lighting and approach section dimming lighting.
(1) The length of each lighting section is calculated according to the regulations in Section 4. Lighting of "Code for Design of Ventilation and Lighting of Highway Tunnels"
(2) The brightness value of the road surface in each section is calculated according to the regulations in Section 4. Lighting of "Code for Design of Highway Tunnel Ventilation and Lighting".
Including: the brightness value of the approach road lighting outside the tunnel, the brightness value of the entrance section, the brightness value of the transition section 1, the brightness value of the transition section 2, the brightness value of the transition section 3, the brightness value of the exit section, the brightness value of the middle section, and the brightness value of emergency lighting, etc. The total brightness uniformity: 0.4, the longitudinal brightness uniformity: 0.6-0.7, the conversion factor of average brightness and average illuminance is 22X/cd.m2 (asphalt concrete pavement).