A column connection structure in the middle section of the cable guardrail

Abstract

The invention discloses a column connection structure in the middle section of a cable guardrail, which comprises a column and a support tube. The support tube and the column are arranged in parallel. There is a wire rope clamping piece between them. The connecting piece and the wire rope clamping piece are combined into a support plate with an integrated structure. The support plate is a double-layer structure and has a round hole. The support tube is sleeved in the round hole. One end of the support plate is connected to the column, and the other end is used as a wire rope clamp. Holder. The side of the support tube is provided with a rope clamping board. The rope clamping plate is provided with a clamping groove with an opening downward or upward, and the position of the clamping groove matches the position of the steel wire rope. The outer boundary of the roller exceeds the outermost end of the wire rope clamping piece. A support structure is arranged between the double-layer structures of the support plates. The outer boundary of the roller exceeds the outer boundary of the support plate to ensure that the car is in contact with the roller during a collision. The support plate realizes the limit of the steel wire rope on the vertical plane, and the support tube and the rope clamping plate realize the limit of the horizontal plane of the steel wire rope.

Description

technical field [0001] The invention relates to the field of highway guardrails, in particular to a column connection structure in the middle section of a cable guardrail. Background technique [0002] In recent years, with the continuous increase of the number of cars and the mileage of expressways in our country, the traffic accidents on the roads are also increasing year by year, and nearly 1 / 3 of the accidents are caused by the collision between cars and guardrails. The miniaturization, large-scale and heavy-duty of automobiles make the defense performance of existing guardrails continue to decline, causing huge casualties and property losses every year. How to improve the protective performance of the guardrail has very realistic and great significance. [0003] The connecting member (called the bracket) of the column in the middle section of the previous cable guardrail is used to support and fix the steel wire rope. Its structure is punched into a U shape with a stee...

AI Technical Summary

Problems solved by technology

The disadvantages of this structure are: (1) When the car directly hits between the two middle pillars obliquely at high speed, due to the low stiffness of the bracket and the large deformation affected by the lateral force, when the car slides to the pillar along the wire rope, the car It is convenient to directly collide with the column, and the friction generated between them is sliding friction, which will cause great damage to the car or personnel; (2) When the car directly hits the connecting member of the column in the middle section at a high speed, the bracket will be more damaged. The large lateral force affects the instantaneous deformation, and the distance between the bracket and the column is small. Therefore, the effect of the wire rope on buffering and correcting the car will be greatly reduced, resulting in a large collision force between the car and the column, and damage to the car or personnel. just bigger

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