A construction method for anchor grooves of prestressed steel-concrete composite beams

Abstract

The invention provides a method for constructing anchor grooves of prestressed steel-concrete composite beams. The method is as follows: before pouring bridge deck concrete, the prefabricated block of sulfur mortar anchor grooves prepared in advance is installed on the steel beam, and then the bridge deck concrete After pouring the bridge deck concrete, when the strength of the bridge deck concrete meets the requirements, energize the resistance wire embedded in the prefabricated block of the sulfur mortar anchor groove, electrolyze the sulfur mortar and empty it, and remove the horizontal connecting steel bars and longitudinal connecting steel bars. The insulating sleeve of the steel bar and the insulating sleeve of the shear nail on the shear nail obtain the anchor groove. The invention has low construction difficulty and is easy to implement, and the shape of the riveting groove formed after construction is consistent with that of the prefabricated block of the sulfur mortar anchor groove, and there is no residue in the anchor groove, so the construction quality is high.

Description

technical field [0001] The invention relates to the construction technology of a prestressed steel-concrete composite beam, in particular to a construction method for an anchor groove of a prestressed steel-concrete composite beam. Background technique [0002] Steel-concrete composite beam has the advantages of both steel structure and concrete structure, and has significant economic and social benefits. It is being more and more widely used in urban overpass bridges and building structures in our country. [0003] The prestressing on the steel-concrete composite beam is generally carried out after the bridge deck and the steel beam form a composite section. The steel structure and concrete on the entire section are subject to prestressing, which makes the stress on the steel structure's bottom plate more unfavorable. , but also greatly reduces the efficiency of the prestress applied to the concrete. [0004] Then combined with prestressed composite beams, when applying pr...

AI Technical Summary

Problems solved by technology

With this construction method, it is difficult to locate the reserved reinforcement holes on the wooden formwork, and it is difficult to penetrate the reinforcement bars, and when pouring the bridge deck concrete, the mortar will leak from the reserved reinforcement holes on the formwork to the group nail holes, and the construction quality is difficult to guarantee; and After pouring, it is difficult to take out the wooden formwork. Not only does it take a lot of man-hours to remove the formwork, but often a small amount of sawdust remains in the concrete and cannot be taken out, which seriously affects the progress and quality of the project.

Images