Rapid replacing method and restoring method for bridge expansion joint

Abstract

The invention relates to a rapid replacing method and a restoring method for a bridge expansion joint, which relates to the technical field of bridge expansion joints. The replacing method comprises the following steps of 1, cutting off original poured concrete in an expansion joint groove and dismantling the original expansion joint device and a beam body embedded reinforcement; step 2, cutting off and trimming the expansion joint groove, whose original poured concrete and expansion joint device are cut off, until the edge of the expansion joint groove is neat; 3, embedding a new beam body embedded reinforcement and a new expansion joint device in the expansion joint groove; 4, coating a bonding layer in the expansion joint groove; 5, pouring modified MMA composite concrete in the expansion joint groove and tamping the modified MMA composite concrete after the modified MMA composite concrete is poured; and 6, striking off the upper surface of the poured concrete and mounting an expansion joint sealing rubber strip on the poured concrete. According to the invention, as the adopted modified MMA composite concrete has the advantages of high mechanical strength, interface bonding force and high compressive strength, the service life of the replaced bridge expansion joint is obviously prolonged, the bridge expansion joint is simple and convenient in construction, and the curing time of the bridge expansion joint is short.

Description

technical field [0001] The invention relates to the technical field of bridge expansion joints, in particular to a rapid replacement method and repair method for bridge expansion joints. Background technique [0002] At present, in all kinds of roads in our country, various types of steel expansion joint devices are widely used in bridge expansion joints. The expansion joints form a beam-like structure after pouring concrete, which is prone to cracks along the bridge direction, and the modulus difference between the cement concrete (or steel fiber concrete, epoxy concrete), steel plate, and asphalt mixture in the expansion joint device is too large , the stress-strain characteristics of each other are significantly different. Due to their own defects and the influence of the operating environment, steel expansion joints are prone to steel fracture, concrete damage, waterstop failure and other diseases. Most steel expansion joints need to be replaced or repaired after a certa...

AI Technical Summary

Problems solved by technology

In addition, after the expansion joint concrete is damaged, if it is repaired with asphalt mixture, cement concrete, or epoxy resin concrete, the service life after repair is short due to poor interface bonding effect

[0004] Therefore, the long construction time of bridge expansion joint replacement or repair will interfere with road traffic and the short service life after replacement or repair is the main technical problem of traditional expansion joint repair replacement or repair. How to realize a method that can quickly construct and reduce traffic Requirements, durable and reliable replacement or repair process to improve the life of the expansion joint device is an urgent need

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