Beam end or bridge head concrete structure of telescopic seam dedicated embedded part and application thereof

Abstract

The invention belongs to the structure and construction of a highway bridge telescopic device and particularly relates to a beam end or bridge head concrete structure of a telescopic seam dedicated embedded part and application thereof. The beam end or bridge head concrete structure of the telescopic seam dedicated embedded part comprises a beam end or a bridge head and embedded parts, wherein theembedded parts are embedded in a reserved groove bottom concrete structure formed in the beam end or bridge head at intervals and are matched with anchoring ribs of a telescopic device; the embeddedparts are integrally embedded in the reserved groove bottom concrete structure; the embedded part top is no higher than the bottom surface of the cavity of a reserved groove and comprises an assembling part and/or a connecting plate; the assembling part can form fixed assembling with the anchoring ribs; and the connecting plate can form fixed assembling with the anchoring ribs. The beam end or bridge head concrete structure effectively solves the problems in the prior art that a telescopic device is long in construction period and is high in construction difficulty and has the advantages of being low in construction difficulty and strength and high in construction speed, facilitating standardized production and the like.

Description

technical field [0001] The invention belongs to the structure and construction of expansion devices for highway bridges, in particular to beam end or bridge head concrete structures embedded with embedded parts specially used for expansion joints and the application thereof. Background technique [0002] The expansion device is an indispensable part of the bridge structure no matter it is on a bridge of any specification. In the bridge structure, it must adapt to the temperature change of the beam, the shrinkage caused by the creep and shrinkage of the concrete, the rotation of the beam end, the The joint changes caused by deflection and other factors, and directly bears the repeated load of the wheel, it is the weakest link in the bridge structure. The installation quality of the expansion device of the highway bridge is of great significance to ensure the service performance of the bridge, improve the driving comfort and ensure the service quality of the highway bridge. A...

AI Technical Summary

Problems solved by technology

[0003] The above-mentioned existing installation methods have the following problems: First, according to the construction requirements, the pre-embedded reinforcement must not be cracked, broken or missing. The cracked and broken steel bars should be repaired or planted according to the welding requirements in time. tendons need to straighten out

Since the lower part of the existing pre-embedded reinforcement is fixed in the concrete structure at the lower part of the reserved groove, and its upper part forms a raised door-shaped structure in the reserved groove, in practice, the upper part often protrudes due to careless operation or processing errors. The pre-embedded reinforcement is bent or broken, causing delays in construction time and increasing construction costs; second, debris is easy to accumulate between the upper protruding pre-embedded reinforcement and the reserved groove (especially asphalt and other debris on the surface are difficult to remove) ), before installing the expansion device, it is usually necessary to use a sharp front-end special tool to slowly excavate the sundries in the reserved tank before installing the telescopic device, resulting in difficult and high-strength construction, difficult cleaning of sundries, and long construction period; third, if If the upper part of the pre-embedded reinforcement is super high, it needs to be cut off, causing unnecessary troubles to the construction; Fourth, when splicing multi-piece beams, due to errors in the prefabrication and hoisting of the beam pieces, the reserved slots and Due to the different widths of the expansion joints and the influence of the protruding pre-embedded ribs, it is not possible to use cover plates to simply cover the expansion joints and then cover the filling materials when paving the bridge deck. Clean up the sundries in the pre-embedded grooves before installing the expansion devices. cumbersome construction, high labor intensity and long construction time

[0004] The applicant has not found any patent literature reports identical or similar to the present invention in the domestic patent database. At present, the research on the telescopic device is mainly focused on the structural improvement of the telescopic device itself.

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