Concrete bridge deck crack repairing method for bridge

Abstract

The invention discloses a method for repairing cracks on a concrete bridge floor of a bridge, and belongs to the technical field of bridges, and the method comprises the following steps: reasonably expanding the cracks, drilling an embedded hole, inserting a defoaming rod into the embedded hole, injecting concrete for repairing, and filling oxygen to exhaust air in the embedded hole, wherein the defoaming rod in the embedded hole can react with oxygen in the concrete to release heat, and then the defoaming rod is softened to deform; a magnetic field is applied above the crack to force the defoaming rods to swing in the concrete, on one hand, the concrete can be assisted to be densely filled, and the fluidity is improved; on the other hand, bubbles in the concrete can be eliminated, oxygen can be absorbed for reaction, the defoaming effect can be improved, oxygen is not prone to remaining, the defoaming rod is gradually cooled and hardened after oxygen is consumed up, the strength can be improved by reserving the defoaming rod in the concrete, and therefore the crack repairing strength is remarkably improved, and the phenomenon of secondary cracking is not prone to occurring.

Description

technical field [0001] The invention relates to the technical field of bridges, in particular to a method for repairing cracks on concrete decks of bridges. Background technique [0002] Bridges generally refer to structures erected on rivers, lakes and seas to allow vehicles and pedestrians to pass smoothly. In order to adapt to the modern high-speed development of the transportation industry, bridges are also extended to buildings that cross mountain streams, poor geology or meet other transportation needs to make traffic more convenient. A bridge is generally composed of a superstructure, a substructure, a support and ancillary structures. The superstructure is also called a bridge span structure, which is the main structure for crossing obstacles; the substructure includes abutments, piers and foundations; Or the force transmission device installed at the supporting place of the bridge abutment; the auxiliary structure refers to the bridge head strap, conical slope prot...

AI Technical Summary

Problems solved by technology

However, at present, Portland cement and ordinary Portland cement concrete are prone to occur during use: alkali-aggregate reaction produces expansion stress that causes the concrete to swell and crack, excessive heat of hydration produces internal stress in structural concrete that causes cracks, and during use Defects such as cracks under ultra-high loads

[0004] At present, for the repair of bridge deck cracks, most of the filling materials are used. Most of the filling materials are concrete of the same origin. However, due to the small crack space, it is difficult to vibrate the concrete to eliminate air bubbles and fill it densely. , resulting in too low repair strength after concrete molding, and secondary cracks are prone to appear under the ultra-high load during use

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