Overall pier and beam built-in connecting structure and construction method thereof

Abstract

The invention relates to an overall pier and beam built-in connecting structure and a construction method thereof. The connecting structure comprises a main beam and concrete-filled steel tube combined pier. The built-in section of the pier and a main beam are integrally formed in an integral pouring mode, the main beam is arranged between main steel tubes of four corner points of the pier, steel frameworks are connected between the adjacent main steel tubes, and prestress steel strands are arranged between the main steel tubes and on the box walls of the steel frameworks and the main beam. Aiming at the problems that the ultimate bearing capacity of a pier and beam connecting position is lower than other positions of the structure, and the pier beam connecting position is firstly damaged under the earthquake load effect, through structure overall rigidity demonstration and system rigidity matching demonstration, the transverse size of the top face of the pier is increased, a beam body of the main beam is embedded between the main steel tubes of the pier in an overall width mode, the steel frameworks are arranged to be connected with the main steel tubes of the pier, the longitudinal and transverse prestress steel strands are tensioned, finally rebar pouring concrete is arranged, the connecting intensity of the pier and the main beam is improved, the ultimate bearing capacity of the pier and beam fixed connecting position is effectively improved, and then the pier and beam connecting position is not a weak link of a structural system any more.

Description

technical field [0001] The invention relates to the technical field of bridges, in particular to a connection structure embedded with integral pier beams and a construction method thereof. Background technique [0002] The terrain of bridges in mountainous areas is complex, the mountains are high and the valleys are deep, and the seismic intensity is high. The bridges are controlled by the overall development line, and the line position is relatively high. The rigid bending moment of the main beam joint is relatively large. [0003] The existing pier-beam joint is mainly to embed the top of the pier steel pipe into the web of the main girder, and realize the pier-beam anchor connection by opening holes in the embedded section of the steel pipe, setting stiffeners, anchor bars and other structures. However, the long-span continuous rigid main girder mostly adopts a box-shaped section, and the main girder is a hollow and thin-walled structure at the pier-beam connection, and ...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide an integral pier-beam embedded connection structure and its construction method to overcome the relatively low ultimate bearing capacity of the connection structure between the existing concrete-filled steel pipe composite bridge pier and the main beam node, and the , the problem of failure prior to other parts of the structure

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