Combined type formwork-erecting-free new and old widened bridge wet joint connecting structure

By arranging steel plates at the bottom of the wet joints and connecting the side beams of the old bridge and the new bridge through bolts, the problems of long construction period and poor durability in the existing technology are solved, and efficient wet joint construction is achieved and the overall performance of the bridge is improved.

CN113585045AInactive Publication Date: 2021-11-02NANJING TECH UNIV +2
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Patent Information

Application Number
CN202110973231.0
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2021-08-24
Publication Date
2021-11-02
Estimated Expiration
Not applicable · inactive patent

AI Technical Summary

Technical Problem

The construction period of wet joints of existing new and old split-wide bridges is long and prone to cracks, which affects the durability and overall performance of the bridge and causes interference to traffic.

Method used

A steel plate is installed at the bottom of the wet joint, and the side beams of the old bridge and the new bridge are connected through bolts. The steel plate also serves as a formwork to achieve formwork-free pouring, improve load-bearing capacity and durability, and reduce welding workload.

Benefits of technology

It increases the construction speed, enhances the load-bearing capacity and durability of wet joints, reduces the impact on traffic, extends the service life of the bridge, and improves the overall stress performance between the old and new bridges.

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Abstract

The invention discloses a combined type formwork-erecting-free new and old widened bridge wet joint connecting structure. The structure comprises an old bridge inner side edge beam, a new bridge inner side edge beam, a wet joint and a steel plate, and the wet joint is located between the old bridge inner side edge beam and the new bridge inner side edge beam. The cast-in-place concrete in the wet joint, the old bridge inner side edge beam and the new bridge inner side edge beam are poured together to form a connecting structure resistant to vertical shearing and transverse bending. Longitudinal steel bars, transverse steel bars and stirrups are further arranged in the wet joint, a steel plate is arranged at the bottom of the wet joint and connected with the new bridge edge beam and the old bridge edge beam through bolts, and the steel plate at the bottom can replace a formwork, can bear shearing force and bending moment of the wet joint area at the same time and bears loads together with concrete. A wet joint concrete pouring formwork can be omitted, and the construction speed is increased; the transverse connection between the new and old widened bridges can be enhanced, and the overall performance of the new and old widened bridges is improved.
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