Construction method of cast-in-place concrete guardrail

Abstract

The invention provides a construction method of a cast-in-place concrete guardrail. The construction method of the cast-in-place concrete guardrail comprises the steps of concrete guardrail construction and external platform construction. Concrete guardrail construction comprises the steps that rib angle steel is fixed to a bridge side face through expansion bolts, and an outer die with oblique ribs is arranged on the rib angle steel and fixed to the bridge side face through expansion bolts; an inner die of which outer bottom corners are provided with ribs is fixed to a bridge face through expansion bolts, and then the outer die with the oblique ribs, an end die and the inner die of which the outer bottom corners are provided with the ribs are fixed together through screws; the rib angle steel is fixed to a bridge by a guardrail external platform through expansion bolts, then a support frame is arranged on the rib angle steel, a platform formwork is arranged on the support frame, and the platform formwork and a fixing ring arranged on the rib angle steel are connected through steel wires to prevent the platform formwork from inclining outwards; and in addition, protecting cylinderspenetrate through hollow screws, prestressed ribs penetrate through the protecting cylinders, the protecting cylinders, the hollow screws and the prestressed ribs are poured together through concrete, and an external platform is borne by the protecting cylinders, the prestressed ribs and the hollow screws.

Description

technical field [0001] The invention relates to a concrete guardrail, in particular to a construction method for a cast-in-place concrete guardrail. Background technique [0002] As a very important functional structure in municipal roads, bridges play a pivotal role in improving urban traffic environment and promoting regional economic development. [0003] In order to improve the safety of pedestrians and passing vehicles, guardrails are generally erected on both sides of the bridge. At present, there are two types of guardrails: steel guardrails and concrete guardrails. The columns of the steel guardrails are fixed to the ground through expansion bolts; while the concrete guardrails need to set up cast-in-place formwork on the bridge, and then cast in-situ. Compared with steel guardrails, concrete guardrails are more stable and safe. Sex is higher. Because the bridge construction position is higher than the ground, and the guardrail is built on the outermost side of the...

AI Technical Summary

Problems solved by technology

Because the bridge construction position is higher than the ground, and the guardrail is built on the outermost side of the bridge, the outer formwork of the guardrail is suspended in the air, and there is no place to place it, so the construction cannot be smooth; Ornamental vegetation is then placed over the platform

When the guardrail is cast in-situ with concrete materials, since the external platform is suspended outside the guardrail, if the bearing capacity of the formwork is not enough when the formwork is erected, the formwork may be crushed when pouring concrete; in addition, the external platform and the guardrail are not poured together, so The requirements for the connection between the two are relatively high, otherwise the external platform will fall from the guardrail

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