A manufacturing process for reserved expansion joints and deformation joints of anti-collision guardrails

Abstract

The invention relates to manufacturing technology of an expansion joint and a deformation joint of a bridge crash barrier. A steel plate and two foam plates are used for reserving the deformation joint and the expansion joint. The deformation joint steel plate is machined according to designed barrier formwork splicing section size. A bolt hole is reserved according to a bolt position of a barrier formwork. When the crash barrier formwork is mounted, a formwork splicing joint is adjusted to a designed deformation joint position, the steel plate is inserted at the splicing joint, and the steel plate and the barrier formwork are integrally connected through a bolt. Then, the foam plates are attached on two sides of the steel plate according to the width of the reserved deformation joint, the foam plates are machined to be in a barrier shape, and lubricating oil is coated on the contacting faces of the steel plate and the foam plates. When the formwork is disassembled, the steel plate is taken out upwards, and the standard deformation joint is formed. According to the technology, the formwork is convenient to assemble and disassemble and can be used repeatedly, cost is saved, the manufactured deformation joint and the manufactured expansion joint are straight and attractive, manufacturing is convenient, simple, quick and reliable, the used formwork can be used as a plug plate at the same time, reinforcing effect is achieved, the reserved joints are hollow, and deformation effect is really achieved.

Description

technical field [0001] The invention belongs to the field of bridge construction engineering, and relates to a reserved anti-collision guardrail, in particular to a manufacturing process of expansion joints and deformation joints of the bridge anti-collision guardrail. Background technique [0002] In order to prevent the anti-collision guardrail from being deformed and cracked by force, a deformation joint needs to be set at a certain interval (usually 2 to 5m) for the anti-collision guardrail, and at the position corresponding to the expansion joint of the bridge deck, the guardrail should also be provided with an expansion joint. Due to the short distance between the deformation joints and the long length of the one-time pouring guardrail, it is necessary to use a device to reserve deformation joints and expansion joints. At present, expansion joints and deformation joints of bridge anti-collision guardrails are usually reserved by wooden boards, which not only wastes mat...

AI Technical Summary

Problems solved by technology

At present, the expansion joints and deformation joints of bridge anti-collision guardrails are usually reserved by wooden boards, which not only wastes materials and is difficult to reinforce, but also easily shifts when tamping the concrete, which affects the appearance; moreover, the wooden boards are embedded in the concrete, which affects the expansion and contraction effect

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