Prefabricated assembly type pier column and top cap connecting structure and construction method thereof

Abstract

The invention provides a prefabricated assembly type pier column and top cap connecting structure and a construction method thereof. The connecting structure comprises a prefabricated pier column and a prefabricated top cap, an anti-shearing tenon is arranged on the top of the prefabricated pier column, an anti-shearing groove is formed in the bottom of the prefabricated top cap, prestressed tendons and connecting steel bars are arranged in the prefabricated pier column, and a plurality of embedded corrugated pipes are arranged in the prefabricated top cap; and pore channels are reserved in the pre-buried corrugated pipes, the pore channels correspond to the prestressed tendons and the connecting steel bars one to one, and the prefabricated pier column and the prefabricated top cap are spliced through splicing seams. The prestressed tendons are arranged, so that the crack resistance of the splicing seams is improved, and the post-earthquake self-resetting capability and the connection reliability are enhanced; the splicing seams are made of ultra-high performance concrete or epoxy mortar, so that the splicing seams can bear certain tensile stress without cracking, and the durability of the splicing seams is improved; the reinforced concrete anti-shear tenons and the anti-shear grooves are arranged to form a mortise and tenon structure, and the joint anti-shear capacity is high; and the connecting structure is particularly suitable for splicing the prefabricated pier column and the top cap in a large cantilever top cap T-shaped pier or an overline frame type pier.

Description

technical field [0001] The invention relates to the technical field of bridge structure construction, in particular to a connection structure between a prefabricated assembled pier column and a top hat and a construction method. Background technique [0002] As the country vigorously promotes prefabricated assembled concrete construction technology, domestic municipal engineering, highway engineering, urban rail transit, and railway engineering have successively adopted prefabricated assembled bridge piers. Through factory manufacturing and mechanized assembly, the rapid assembly of bridge piers has been realized. The components of prefabricated assembled bridge piers are assembled on site through a certain connection form, and the strength, shear resistance, and durability of the connection form directly affect the safety and reliability of the prefabricated assembled structure. [0003] The most commonly used connection form between the prefabricated assembled pier and the...

AI Technical Summary

Problems solved by technology

When the splicing seam is under tension and the tensile stress exceeds the bonding force between prefabricated components, it will crack and may continue to expand under the action of live load and other dynamic loads, which will affect the durability of the splicing seam, thereby affecting the safety of the splicing connection and reliability

Therefore, neither the steel sleeve grouting connection nor the steel bellows connection is suitable for the above situation

At the same time, the top cap and the pier column are generally manufactured separately at the joint, and there is no shear key on it, so the shear resistance may be insufficient when used in high-intensity earthquake areas

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