Semi-prefabricated UHPC shell overlap cover beam and prefabricated pier stud connecting structure and construction method thereof

Abstract

The invention relates to a semi-prefabricated UHPC shell overlap cover beam and prefabricated pier stud connecting structure and a construction method thereof. The semi-prefabricated UHPC shell overlap cover beam and prefabricated pier stud connecting structure comprises a semi-prefabricated UHPC cover beam shell and a prefabricated pier stud located under the semi-prefabricated UHPC cover beam shell; the semi-prefabricated UHPC cover beam shell is of an uncovered shell-shaped structure with the hollow interior; a pier stud after-pouring groove is vertically formed in the top of the prefabricated pier stud from top to bottom; a through hole which is coaxial with and is matched with the pier stud after-pouring groove is formed in the bottom of the semi-prefabricated UHPC cover beam shell in a penetrating manner, and the through hole is located at the center of the bottom of the semi-prefabricated UHPC cover beam shell; a plurality of pier stud longitudinal ribs are embedded into the prefabricated pier stud, and the upper ends of the pier stud longitudinal ribs all vertically and upwards extend to penetrate through the through hole and go into the semi-prefabricated UHPC cover beam shell; and a cover beam steel reinforcement cage is arranged in the semi-prefabricated UHPC cover beam shell. The semi-prefabricated UHPC shell overlap cover beam and prefabricated pier stud connecting structure is simple and reasonable in structure and good in durability.

Description

technical field [0001] The invention relates to a connection structure between a semi-prefabricated UHPC shell superimposed cover beam and a prefabricated pier column and a construction method thereof. Background technique [0002] The existing traditional cast-in-place bridge pier supports have high costs, high safety risks, serious environmental pollution, and traffic closures. However, the prefabricated assembly technology of bridge structures has the characteristics of high efficiency, safety, high quality, speed, and environmental protection. Construction trends. [0003] In the prior art, two types of prefabricated cover beams are often used: one is the integral fully prefabricated cover beam, which has a large dead weight and has particularly high requirements for cranes and transport machinery; the other is the segmented fully prefabricated cover beam, whose Water seepage is prone to occur at the joints, which affects the durability. The longitudinal reinforcement i...

AI Technical Summary

Problems solved by technology

[0002] The existing traditional cast-in-place bridge pier supports have high costs, high safety risks, serious environmental pollution, and traffic closures. However, the prefabricated assembly technology of bridge structures has the characteristics of high efficiency, safety, high quality, speed, and environmental protection. Construction Trends

[0003] In the prior art, two types of prefabricated cover beams are often used: one is the integral fully prefabricated cover beam, which has a large dead weight and has particularly high requirements for cranes and transport machinery; the other is the segmented fully prefabricated cover beam, whose Water seepage is prone to occur at the joints, which affects the durability. The longitudinal reinforcement is segmented and discontinuous on the segment interface, so it cannot transmit force continuously

And the assembly of the above-mentioned prefabricated cover beam and prefabricated pier column usually adopts the connection method of pre-embedded grouting sleeve, metal bellows and prestressed steel strands, and then the pre-embedded steel bars are precisely positioned and socketed in the above-mentioned pre-embedded parts. It has high requirements for construction positioning accuracy of embedded parts and pre-embedded steel bars, the redundancy of on-site construction adjustment is small, and the integrity of the connection is not good

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