The purpose of tiling the tunnel is to enhance the reflection effect in the tunnel and prevent the driver from producing the black hole effect. In the same tunnel, half of the sides are black without tiles, and the other half is covered with white tiles, which looks much brighter under the same light. Therefore, it is very beneficial to lay tiles in high-speed tunnels, which can reduce accidents and make driving safer.
Highway tunnel is a passage for automobile transportation. With the development of social economy and production, a large number of expressways appear, which puts forward higher standards for road construction technology, requiring straight lines, gentle slopes and spacious roads. Therefore, when the highway crosses the mountainous area, the past winding mountain bypass scheme is mostly changed to tunnel scheme.
The main building of highway tunnel is generally composed of tunnel body, lining and portal, and Jianming tunnel is added in the area where portal is easy to collapse. The tunnel accessory structure includes waterproof and drainage facilities, ventilation and lighting facilities, traffic signal facilities and emergency facilities. Highway tunnel design usually starts with the scheme design, and then carries out the concrete design of the plane and vertical section, gauge and lining of the tunnel.