UHPC honeycomb precast slab-steel box girder composite beam structure and construction method

Abstract

The invention relates to a UHPC honeycomb precast slab-steel box girder composite beam structure and a construction method, and relates to the technical field of bridge structures. The composite beamstructure comprises a UHPC honeycomb precast slab and a steel box girder, wherein the UHPC honeycomb precast slab is arranged to be of a honeycomb sandwich structure and sequentially comprises an upper skin plate, a honeycomb core material, a lower skin plate and two side skin plates which are tightly connected with the left side face and the right side face of the honeycomb core material respectively from top to bottom, and the lower surface of the lower skin plate is fixedly connected with the steel box girder. The high-strength characteristic of the UHPC material, the light weight, compression resistance and bending resistance of the honeycomb sandwich structure and the shear capacity of the steel box girder component are fully utilized, the problem that the bridge deck is prone to cracking can be solved, and the dead weight of the bridge structure can be reduced. Besides, the UHPC honeycomb precast slab and the steel box girder are precast into a whole through a factory and then transported to the site for segmental assembly, so that the efficiency can be improved, and the construction period can be shortened. Therefore, the self-weight of the bridge structure can be reduced, the cost can be reduced, the construction efficiency can be improved, and the construction period can be shortened.

Description

technical field [0001] The present application relates to the technical field of bridge structures, in particular to a UHPC honeycomb prefabricated board-steel box girder composite beam structure and construction method. Background technique [0002] Conventional composite beam structures are usually composed of solid ordinary concrete bridge decks and steel box girder members. Due to the low tensile strength of concrete materials and obvious shrinkage and creep effects, concrete bridge decks are prone to cracking problems under external loads and restraint loads. . [0003] In related technologies, measures such as increasing the thickness of the bridge deck and configuring prestressed tendons are usually adopted to solve the cracking problem of the concrete bridge deck. Plate materials will further increase the self-weight of the bridge section, and the design of the structural size needs to be increased accordingly. There are problems of large consumption of consumables ...

AI Technical Summary

Problems solved by technology

[0004] The embodiment of the present application provides a composite beam structure and construction method of UHPC honeycomb prefabricated slab-steel box girder to solve the bridge deck’s easy-to-crack problem caused by increasing the thickness of the bridge deck in the related art. The problem of large consumption of consumables and high construction costs

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