Prestressed hinge joint structure of prefabricated bridge deck slab of fully-assembled composite beam bridge and construction method of prestressed hinge joint structure

Abstract

The invention relates to the field of bridge engineering, in particular to a prestressed hinge joint structure of prefabricated bridge decks of a fully-assembled composite beam bridge and a construction method thereof.The prestressed hinge joint structure comprises the prefabricated bridge decks with holes, the adjacent prefabricated bridge decks with the holes are connected through a prestressed system, vertical reserved holes are formed in the boundaries of the prefabricated bridge decks with the holes, and U-shaped notches are formed in the peripheries of the prefabricated bridge decks with the holes; an annular steel bar is preset in the U-shaped notch, plugs are arranged at the two ends of the U-shaped notch formed between every two adjacent prefabricated bridge deck slabs with holes, and high-strength slurry is injected through grouting holes formed in the prefabricated bridge deck slabs with holes to form plugging. The steel beam is arranged below the prefabricated bridge deck slab with the holes, and the steel beam is fixed to the prefabricated bridge deck slab with the holes in the mode that the bolt shear keys are matched with the vertical reserved holes. After the scheme is adopted, the device has the advantages of simple structure, convenience in assembly, high implementation speed and the like.

Description

technical field [0001] The invention relates to the field of bridge engineering, in particular to a prefabricated deck prestressed joint structure of a fully assembled composite girder bridge and a construction method thereof. Background technique [0002] With the further advancement of bridge industrialization, the construction method has gradually changed from the traditional on-site pouring of all components to factory prefabrication of some or most of the components, and then transported to the site for installation; compared with traditional construction methods, the industrial prefabrication method first requires What is solved is the connection between the various prefabricated components. However, the biggest challenge in using prefabricated bridge decks is how to achieve good and fast connections between prefabricated bridge decks and prefabricated bridge decks and between prefabricated bridge decks and steel girders. Among them, the hinge joint structure is the k...

AI Technical Summary

Problems solved by technology

[0004] First, in terms of materials, wet joint concrete is poured on site, and the quality of pouring and maintenance is difficult to guarantee, and the strength of the interface between new and old concrete is low, which is the weakest link of force, especially when the negative bending moment of the support occurs. , the problem is more obvious

[0005] The second aspect, in terms of construction, the joint space is small and the steel bars are dense, which makes the construction difficult and the construction quality is difficult to guarantee

[0006] In the third aspect, in terms of force, the ordinary steel bars of the bridge deck are discontinuous at the joints, resulting in a weak surface for force transmission on the bridge deck

[0007] The fourth aspect, in terms of economy, due to the cracking of the joints, the pavement layer is affected, which affects the driving comfort and the life of the shear connectors, and the maintenance cost is greatly increased.

The most important point is that the maintenance cycle is long, which affects the commissioning of the bridge

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