Glossary of technology and equipment for "tunnel structure"

When you build a road, you will hit mountains and hills. If you can't avoid these obstacles, dig a tunnel and make a way to the other side.
NEXCO EAST, various excavating machines ( TWS ・ TBM ) And excavation methods.

tunnel Gate Komon

It is the entrance to the tunnel.
It has been designed and installed in consideration of natural conditions, harmony with the surrounding landscape, and the effects on vehicle driving.

tunnel Interior plate Not so good

It is provided inside the tunnel and aims to improve the lighting effect by raising the reflectance of the wall surface. It is required that the material has a small decrease in reflectance, high weather resistance, water resistance, chemical resistance, strength that will not be damaged by the pressure during cleaning, and fire resistance and non-combustibility.

Jet fan,
tunnel Ventilating facilities Kankusebi

Ventilation equipment in the tunnel. It is often installed on the ceiling of long tunnels and has the shape of a jet engine. It is used as a blower for smoke exhaust.

tunnel illumination Shomei

It provides visual information while driving in the tunnel to ensure safety by recognizing obstacles in the tunnel, confirming the alignment, and guiding the eyes. It consists of basic lighting, relaxation lighting, and emergency lighting.
A low-pressure sodium lamp is generally used as the light source for tunnel lighting, but a fluorescent lamp is used as the lighting for the emergency parking zone. In addition, the tunnel lighting near the entrance is automatically controlled according to the outdoor brightness.

radio Rebroadcast facility Good news

It is a facility that allows the passing vehicles to listen to the radio broadcast even in the tunnel.In case of an emergency such as a vehicle accident in the tunnel, the emergency broadcast is interrupted to each radio broadcast to transmit the information. , To ensure smooth traffic.