Method for quickly repairing and reinforcing post-earthquake damaged pier

Abstract

The invention relates to a method for quickly repairing and reinforcing a post-earthquake damaged pier. A member of the post-earthquake damaged pier is not required to be straightened. The method comprises the following steps of (1), cleaning, (2), gouging, (3) injecting glue, (4), embedding steel bars, (5), pouring, and (6), winding cloth, wherein in Step (1), loose concrete in a plastic hinge area is cleaned, and a bulged steel bar is straightened rather than replaced; in Step (2), steel bar embedding grooves are formed in a near surface, namely a protective layer of the pier, and fragments in the grooves and the surface of the concrete at the peripheries of the grooves are cleaned; in Step (3), the steel bar embedding glue is injected into the steel bar embedding grooves; in Step (4), fiber steel bars are washed cleanly by industrial alcohol, and mounted in the steel bar embedding grooves after dried, and the external surfaces of the fiber steel bars are covered with the steel bar embedding glue and floated; in Step (5), a formwork is erected after the steel bar embedding glue is solidified, and repair concrete of the plastic hinge area is poured; and in Step (6), after the repair concrete is solidified, the formwork is dismounted, and wound with three layers of fiber cloth, and the winding height is kept consistent with the steel bar embedding height. The method can quickly repair the damaged pier, and allow the repaired and reinforced pier to have sufficient bearing capacity.

Description

technical field [0001] The invention relates to a method for quickly repairing and strengthening damaged bridge piers after earthquakes, and belongs to the technical field of engineering anti-seismic reinforcement. Background technique [0002] The bridge pier is the only lateral force-resistant component in the bridge structure, and it is inevitable to be damaged in an earthquake. According to the "two-level" seismic fortification goal in the current "Code for Seismic Design of Highway Bridges" in my country, that is, when the bridge is subjected to In the event of rare earthquakes with a low probability of occurrence during the period, it should be ensured that no collapse or serious structural damage will occur, and it can still be used after reinforcement and repair. Although the research work on bridge pier repair has gradually increased at home and abroad, the subjective awareness of knocking down and rebuilding damaged structures after the earthquake is still relativel...

AI Technical Summary

Problems solved by technology

Although the research work on bridge pier repair has gradually increased at home and abroad, the subjective awareness of knocking down and rebuilding damaged structures after the earthquake is still relatively strong, and the repair work has not received enough attention

Most of the existing research work on repair and reinforcement is to apply the traditional reinforcement technology to the repair and reinforcement of bridge piers, and most of them are to reinforce the intact bridge piers before the earthquake. Composite material (FRP) reinforcement method, etc., the research found that the traditional reinforcement technology only pursues the bearing capacity of the bridge pier after repair, and the construction process is complicated, the cost is relatively high, and the actual needs of the post-earthquake engineering are not considered, and it cannot achieve rapid recovery. purpose of repair

If it is torn down and rebuilt, the cost will be high, it will take up space, and the construction period will be long, so it cannot be quickly put into rescue and disaster relief work

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