The role of highway guardrails and installation precautions

1. The road guardrail separates the traffic of motor vehicles, non-motor vehicles and pedestrians, and separates the road longitudinally in the section, so that motor vehicles, non-motor vehicles and pedestrians can travel in separate lanes, thereby which improves the safety of road traffic and improves traffic order;
2. The road guardrail will block bad traffic behavior, block pedestrians, bicycles or motor vehicles trying to cross the road. It requires the railing to have a certain height, a certain density and a certain strength;
3. Through the installation, the outline of the guardrail should be concise and clear, and the driver should be warned to pay attention to the existence of the guardrail and pay attention to pedestrians and non-motorized vehicles, to avoid the occurrence of traffic accidents;
4. Through the different materials, different shapes, different shapes and different colors of the guardrail, it can achieve harmony and coordination with the road environment;

It can be seen that the road guardrail is not only a simple isolation of the road, but also a key purpose for expressing and transmitting urban traffic information to the flow of people and vehicles, and achieving the effect of safety, speed, order, softness and convenience

When installing road guardrails, attention should be paid to the following points:

When installing high road guardrails, place them in accordance with the fill height, slope and conditions of the protected objects. Through the general protection of the handrail and the correct guidance of the vehicle, it is an integral action to guarantee the safety of the occupants of the vehicle from collision. Before laying, you should familiarize yourself with the routes along the line and the layout of bridges and culverts, and give them full consideration; Generally, concrete wall guardrails are generally used in large and medium-sized bridges, and there is a rigid-flexible transition process when connecting with highway guardrails, which should be paid attention to. At this time, the path should be strengthened and firmly connected with the wall railing. To avoid the influence of expansion joints on the bridge, a wall railing section can be added to the bridge abutment; and special attention should be paid to the placement of the opening in the highway guardrail at the emergency telephone to adequately protect the telephone facilities. .
In the section where a high retaining wall is established, it should be considered whether the base of the guardrail column is firm. For safety reasons, wall-type railings can be changed; The guardrails must also be installed in the tunnel and must connect properly with the guardrails outside the tunnel. When the radius of the curve is less than 70 m, the usual handrail (a single piece 4 m long) can no longer be used, but a special curved beam must be used. When designing, the number of curved beams should be counted separately according to different radii.
When guardrails are used on the center divider, the cooperation with the pipe embedded under the center divider must be fully considered. If a separate handrail is used, the conflict between the handrail column and the pre-embedded tube at the opening of the central partition should be avoided, and attention should also be paid to the sharp curve; The use of a guardrail with anti-blocking system The blocks not only increase the deformation capacity of the guardrail, but also make the post behind the column move, to ensure that the vehicle hits the guardrail first, preventing the column from The handrail locks the wheels, and has high safety performance.