Crashproof guard bar

Abstract

A crashproof guard bar includes a guard bar base (1), a column (2), a bridging beam (3) and an energy-absorbing screw thread member (4). The guard bar base (1) is F type and is set across the road bed. The rear segment of the basic bridging beam (11) on the guard bar base (1) is disposed with a guide groove (12). A hole (13) is disposed in the basic bridging beam (11) at the front end of the guiding groove (12) along longitudinal direction, and is disposed with the energy-absorbing screw thread member (4). The column (2) is disposed in the guide groove (12) and is connected to the energy-absorbing screw thread member (4). The bridging beam (3) is disposed in front of the column (2) and is connected with the column (2). The invention has firm base, will not occupy effective running road surface, can generate buffer energy-absorbing function when the vehicle crashes the guard bar, and can crash intensity and has good guide ability, and can farthest reduce the damage to the vehicle and passenger from the crash. The invention is especially adapted for the pavement anti-collision guard bar on cliff and bridge anti-collision guard bar.

Description

Technical field: [0001] The invention belongs to an anti-collision guardrail, in particular to an anti-collision guardrail in a particularly dangerous area, such as a highway anti-collision guardrail and a bridge anti-collision guardrail on a cliff. Background technique: [0002] As an important safety facility for highways and bridges, anti-collision barriers can effectively prevent vehicles from rushing out and reduce traffic accident losses, and have been widely used. Crash guardrails can be divided into rigid guardrails, semi-rigid guardrails and flexible guardrails according to their rigidity. They are very different in structure and collision energy absorption mechanism. Due to high cost and difficult maintenance, flexible guardrails are only used in tourist attractions that require beautiful appearance. The semi-rigid guardrail is easy to carry, easy to install on site, suitable for mass production, and can produce large elastic-plastic deformation during the collisi...

AI Technical Summary

Problems solved by technology

[0003] However, after the existing semi-rigid guardrail is hit by a car, it always absorbs the impact kinetic energy of the car through the deformation of the guardrail beam and the column, and the deformation of the column is always around the bending deformation of the root of the column, that is, the column after impact Always in a tilted state, resulting in the continuous decrease of the effective height of the guardrail during the collision process, which can easily induce the vehicle to roll over. At the same time, the deformation of the guardrail is too large, which is not conducive to guiding the out-of-control vehicle back to the correct driving track

[0004] For this reason, people have to use a large number of concrete guardrails (ie rigid guardrails) on particularly dangerous road sections such as highways on cliffs and bridges. The track has the advantage of strong guiding ability, but the concrete guardrail is not easy to carry, and is not suitable for the production mode of large-scale production in enterprises, and because it cannot absorb the impact kinetic energy of the car through its own deformation during the car collision process, only a limited one can be used The slope is used to guide the vehicle to climb up, in an attempt to convert the kinetic energy of the vehicle into potential energy, so as to reduce the impact level of the vehicle. However, this method is suitable for large trucks or buses with a high center of gravity, because the vehicle must climb up the concrete guardrail ramp. Steering (to return to the correct driving track) often leads to an unreasonable trajectory of the vehicle's center of gravity, and the direct result is that the vehicle rollover accident is unavoidable

[0005] The use of concrete guardrails on bridges, in addition to the above-mentioned problems of concrete guardrails, will also cause additional loads on bridges due to the large windward area. This load cannot be ignored on bridges in coastal areas. Therefore, there are It is necessary to develop a new guardrail that can overcome the deficiencies of semi-rigid guardrails and concrete guardrails, and can have all the advantages of both

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