Frustum-shaped height-adjustable guardrail fixing cap and method of use thereof

Abstract

The invention discloses a truncated-cone-shaped height-adjustable guardrail fixing cap and an application method of the guardrail fixing cap and relates to the field of construction of road traffic safety facilities. The guardrail fixing cap is mainly composed of a truncated-cone-shaped stand column, a cross-shaped cover plate, a guardrail beam hoop, an open wedge-shaped slide resistance ring, a guardrail beam and the like. The truncated-cone-shaped stand column is additionally provided with a fixing cap body, a fixing cap cover, an open-type fixing cap hoop, a fixing cap slide resistance ring, a fixing plate, a threaded rod, a lower nut, a lower middle nut, an upper middle nut, an upper nut and other structures. A plurality of fixing cap openings, fixing cap wing plates, wing plate hooks and stop pieces are further arranged on the outer edge of the bottom end of the fixing cap body. By combining the additionally arranged structures, stepless regulation of the height of the guardrail beam can be better improved, and stress safety for bearing a car load during collision can be better improved; the improved fixing cap further has the advantages of being simple in structure, convenient to construct, reliable in adjustment and the like, and therefore safe use of the traffic facilities is ensured.

Description

technical field [0001] The invention relates to a fixing device for a frustum-shaped adjustable-height guardrail in the field of road traffic safety facility construction, in particular to a fixing cap for a frustum-shaped adjustable-height guardrail and a method for using the same. Background technique [0002] Uneven settlement of soft foundations in highways and other road projects is likely to cause unevenness of the bridgehead slope. After paving the subsidence part of the road surface, the height of the guardrail needs to be adjusted. For example, the published Chinese patent No. ZL201220684508. "Adjustable height guardrail" refers to a height-adjustable guardrail. Its structure is mainly composed of a conical column, a guardrail beam hoop, a guardrail beam, an open wedge-shaped anti-slip ring, and a bolt group. By adjusting the guardrail beam hoop in the The lifting position on the frustum-shaped column realizes the stepless adjustment of the height of the guardrail b...

AI Technical Summary

Problems solved by technology

At the same time, when the frustum-shaped adjustable-height guardrail is hit by a vehicle, the impact direction of the vehicle is not always horizontal. Vertical, so there are three main possibilities for the direction of the impact force of the vehicle load: first, the impact force is horizontal, and the guardrail beam of the frustum-shaped adjustable height guardrail can withstand the impact force due to the effect of the guardrail beam hoop; second, the impact force has The downward component force, because the impact force of the vehicle is instantaneous, the friction effect of the split wedge anti-slip ring is invalid. Although the diameter of the cone-shaped column increases downward, the split wedge anti-slip ring is effective. With a certain thickness, the hoop of the guardrail beam will move downward for a certain distance without restraint, which is unsafe for vehicles; third, the impact force has an upward component, because the diameter of the cone-shaped column in the direction of taper is reduced upwards , the impact force of the vehicle is instantaneous, and under the action of the instantaneous impact force, the frictional resistance of the split wedge-shaped anti-slip ring in the guardrail beam hoop will fail. At this time, there are certain unsafe factors in the entire guardrail

In addition, for the guardrail beam on the truncated column, if the hole is drilled through the truncated column and the hoop of the guardrail beam, it is directly fixed with a bolt group. Although the guardrail beam can be fixed, the height of the guardrail beam cannot be adjusted steplessly; If part of the outer surface of the frustum-shaped column is processed into tapered pipe threads, and the tapered pipe nut is used to fix the guardrail beam, in theory, it is necessary to make infinitely many tapered pipe nuts in order to achieve stepless adjustment of the height of the guardrail beam. It takes a lot of material and labor in the operation, and it is impossible to adjust the height of the guardrail beam steplessly

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