Method for reinforcing curved bridge through prestressed carbon plate

Abstract

The invention relates to a method for reinforcing a curved bridge through a prestressed carbon plate. The method comprises the following steps that S1, line drawing and perforating are carried out, holes are cleaned, and a concrete base face is cleaned; S2, a fixed end anchor head and a fixed end anchor plate are fixed to the fixed end of the concrete base face, a stretching end anchor head and astretching end anchor plate are fixed to the stretching end of the concrete base face, a stretching end baffle, a stretching end anchor plate and a stretching tool baffle are connected through a high-strength screw rod, a hydraulic jack is placed between the stretching end anchor plate and the stretching tool baffle, one end of a carbon fiber plate is fixed into the fixed end, the other end of thecarbon fiber plate is located at the stretching end, and the middle of the carbon fiber plate is fixed through a pressing plate; S3, the portion between the concrete base face and the carbon fiber plate is coated with an adhesive, the hydraulic jack is driven to drive the stretching end anchor head and the stretching end anchor plate to move through pushing counter-force, after prestress tensionof the carbon fiber plate is in place, an anchoring nut at the stretching end is screwed down, finally a corresponding device is torn down, and the reinforcing process on the curved bridge is completed.

Description

technical field [0001] The invention relates to the technical field of building reinforcement, in particular to a method for reinforcing curved bridges with prestressed carbon plates. Background technique [0002] Today, most of the buildings and infrastructure in the world are still dominated by reinforced concrete or steel structures. Over time, the steel bars are easily corroded by the surrounding environment, which seriously reduces the service life of the buildings. Therefore, strengthening the building structure has become one of the most effective remedial measures at present. The prestressed carbon plate reinforcement technology is an emerging reinforcement technology in recent years. By applying prestress to the carbon fiber plate, its high strength can be fully utilized and utilized; compared with non-prestressed carbon fiber reinforcement, it can effectively improve the strength of the reinforced structure. and stiffness. [0003] At present, the prestressed car...

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Problems solved by technology

This is mainly because the curved surface reinforcement has the following difficulties compared with the plane reinforcement: on the one hand, because the prestressed carbon plate is a unidirectional high-strength material, its strength in the direction perpendicular to the plate is low, so the curved surface reinforcement requires prestressing. The stressed carbon plate material itself has high flexural strength and interlayer shear strength; on the other hand, in concave construction, the prestressed carbon plate is away from the concrete base, how to control the distance between the carbon fiber plate and the concrete base will affect the processing effect The impact is great. If the distance between the two is too large, such as exceeding 10mm, it will cause construction difficulties; in addition, the density of the pressing sheet arrangement will affect whether the carbon plate will cause stress concentration and cause carbon fiber plate damage.

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