Crashproof guard bar

Abstract

An anti-collision guardrail, comprising a guardrail foundation (1), a column (2), a beam (3) and an energy-absorbing threaded part (4), the guardrail foundation (1) is F-shaped, placed horizontally in the roadbed, and the guardrail foundation (1 ) on the foundation beam (11) on the rear section to open a guide groove (12), in the foundation beam (11) at the front end of the guide groove (12), a hole (13) is provided along the longitudinal direction, and a hole (13) is set in the hole (13). The energy-absorbing threaded part (4), the column (2) is arranged in the guide groove (12) and connected with the energy-absorbing threaded part (4), the beam (3) is arranged in front of the column (2) and connected with the column (2) . The invention has the characteristics of firm foundation, no encroachment on the effective driving road surface, buffering and energy absorbing effect when the vehicle collides with the guardrail, reduced collision intensity and good guiding ability, and can minimize the damage to the vehicle and passengers caused by the collision. It is especially suitable for highway anti-collision barriers and bridge anti-collision barriers on cliffs.

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 a bending deformation around the root of the column, that is, after the impact. The column is always in a tilted state, which leads to the continuous decrease of the effective height of the guardrail during the collision process, which easily induces 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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