Bridge railings are strip-shaped protective structures installed on both sides of bridges to prevent out-of-control vehicles from veering off the bridge and causing serious traffic accidents.
The protective principle of bridge railings is mainly to absorb the energy generated during a collision by changing their shape or the direction of the vehicle's travel.
Bridge railings can be classified into three types according to materials: PVC, PP, and PE. PVC railings are sturdy, durable, easy to install, and environmentally friendly; PP railings have high strength and rigidity, but are relatively less used; PE railings have good impact resistance and are one of the earliest types of anti-collision plastic railings. According to their stress characteristics, railings are classified into three types: rigid, semi-rigid, and flexible. Rigid railings are mainly concrete structures and are almost non-deformable; semi-rigid railings, such as corrugated beam railings, combine a certain degree of flexibility and rigidity, absorbing energy through structural deformation; flexible railings, such as cable railings, have strong buffering performance and rely on the tension of the cables to resist impact. According to type, common types include cable railings, corrugated beam railings, wooden beam railings with embedded steel plates, and concrete railings.
Bridge railings, as important traffic safety facilities, have multiple functions. First, it effectively prevents out-of-control vehicles from running off the bridge or crossing the central divider, thus avoiding serious traffic accidents. Second, in the event of a collision, the guardrail has a certain buffering capacity, absorbing some of the impact energy and reducing the degree of injury to the vehicle and its occupants. Furthermore, a well-placed guardrail can guide the driver's line of sight, alleviating visual fatigue and psychological stress, and improving driving safety. Finally, with the improvement of people's living standards, bridge guardrails, while fulfilling practical needs, also play a role in beautifying the road environment, achieving harmony and unity with the surrounding environment through the application of different materials, colors, and shapes.