Bridge deck rabbet wet joint connecting structure and construction method thereof

Abstract

The invention discloses a bridge deck rabbet wet joint connecting structure and a construction method thereof, two adjacent prefabricated concrete beams are connected through a reserved UHPC wet joint, and ultra-high performance concrete is poured in the UHPC wet joint; a prestressed duct is reserved in a flange plate of the prefabricated concrete beam, a prestressed steel strand is arranged in the prestressed duct, and clamping piece anchorage devices are embedded in the two sides of the prestressed duct. The method has the characteristics of easiness in industrialized production, small field pouring amount, high construction speed, high wet joint quality, small influence on construction field traffic and surrounding environment and the like.

Description

technical field [0001] The invention belongs to the technical field of bridge engineering, and in particular relates to a bridge deck tongue-and-groove wet joint connection structure and a construction method thereof. Background technique [0002] With the continuous development of modern construction technology, the performance requirements for the wet joints of prefabricated girder decks are getting higher and higher. As the main structural part of the bridge deck system of highway bridges, the wet joint structure bears heavy traffic loads on the bridge deck. The service life of wet joints has a great impact on the normal operation of bridges, so how to improve the performance of wet joints by utilizing the advantages of existing materials and designing the structure of wet joints has become particularly important. [0003] Judging from the current status of bridges that have been put into operation, cracking at wet joints has become a common phenomenon. Most bridge decks ...

AI Technical Summary

Problems solved by technology

[0003] Judging from the current status of bridges that have been put into operation, cracking at wet joints has become a common phenomenon. Most bridge decks work with joints. When the accumulated water enters the cracks, it will corrode the internal steel bars and cause rust swelling, which will cause tensile stress inside the concrete that wraps the steel bars, and then cause a larger area of ​​cracking, which seriously affects the performance of the wet joints; secondly, in order to ensure wet joints Good mechanical properties at the joints usually require sufficient reinforcement. When the number of spans and girders of a prefabricated girder bridge is large, the following problems will occur:

[0004] The amount of steel welding in wet joints is very large, which increases the use of materials, labor costs and time costs;

[0005] The construction time is relatively long, and the current traffic under the bridge is greatly affected during construction;

[0006] The welding quality of the reserved steel bars is poor, and when the position deviation of the reserved steel bars on the bridge deck occurs, it is necessary to correct the position of the steel bars before welding, and the construction process is cumbersome

[0007] In addition, the construction of wet joints requires the erection of the formwork first. The traditional formwork generally adopts the full-frame formwork and the suspension method. Both of these methods require the erection of supports under the bridge, which has a great impact on the traffic under the bridge. High-altitude operation, high risk, more materials used in the support frame, long turnaround time

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