Concrete structure using reinforcing panel including embedded reinforcing grid and method of repairing and reinforcing the same

• US 10,640,977 B2
• Filed: 12/21/2017
• Issued: 05/05/2020
• Est. Priority Date: 11/21/2017
• Status: Active Grant

• Current Assignee: Korea Institute of Civil Engineering and Building Technology
• Original Assignee: Korea Institute of Civil Engineering and Building Technology
• Inventors: Kim, Hyeong Yeol
• Primary Examiner(s): Ford, Gisele D
• Application Number:
  US15/849,673
• Publication Number:
  US 20190153728A1
• Time in Patent Office: 866 Days
• CPC Class Codes: E04C 2/06 reinforced
• CPC Class Codes: E04C 2/526 with adaptations not otherwise provided for, for connecting, transport; for making impervious or hermetic, e.g. sealings
• CPC Class Codes: E04C 5/01 Reinforcing elements of metal, e.g. with non-structural coatings E04C5/08 takes precedence
• CPC Class Codes: E04C 5/0627 Three-dimensional reinforcements composed of a prefabricated reinforcing mat combined with reinforcing elements protruding out of the plane of the mat E04C5/0645 takes precedence
• CPC Class Codes: E04C 5/07 Reinforcing elements of material other than metal, e.g. of glass, of plastics, or not exclusively made of metal metal elements with non-structural coatings E04C5/01
• CPC Class Codes: E04C 5/18 Spacers of metal or substantially of metal E04C5/168 takes precedence
• CPC Class Codes: E04G 23/0211 using injection
• CPC Class Codes: E04G 23/0218 Increasing or restoring the load-bearing capacity of building construction elements E04G23/0203 and E04G23/0266 take precedence

Abstract

Reinforcing panel having high durability, high strength, and high hardness is applied such that a concrete structure may be repaired to have excellent resistance to an external environment and to be structurally excellent. In comparison to existing bonding methods, a concrete structure and a reinforcing panel may be completely attached to each other as a whole using a repairing material with high fluidity as a cement-based material injected into a repair cross section. Part with microcracks is completely filled with repairing cement mortar injected at high pressure. Since reinforcing panel is precast-fabricated in a factory, embossing, intaglio, color, and the like may be easily added to an external surface of the reinforcing panel and an excellent exterior may be provided after repair due to an aesthetic cross section thereof. The reinforcing panel fabricated in a factory is applied as to reduce labor costs and construction costs.

Claims

1. A method of repairing and reinforcing a concrete structure using a reinforcing panel, comprising:

(a) checking a repair cross section of a concrete structure, which is deteriorated or damaged;

(b) removing chippings of the repair cross section of the concrete structure and forming a drilled hole for a set anchor;

(c) fastening an anchor bolt of the set anchor through the drilled hole and applying a primer to the repair cross section;

(d) previously applying repairing cement mortar to a reinforcing panel or applying the repairing cement mortar to the repair cross section;

(e) compressing the reinforcing panel, in which a reinforcing grid with reinforcing spacers and reinforcing channels arranged in a grid shape is embedded, to the repair cross section and injecting the repairing cement mortar into openings of the reinforcing channels of the reinforcing panel, wherein the reinforcing channels and the reinforcing spacers are separately formed, and the reinforcing channels are respectively disposed above the reinforcing spacers in a thickness direction of the reinforcing panel;

(f) fixing the reinforcing panel to the repair cross section of the concrete structure by additionally applying a pressure using an anchor nut of the set anchor; and

(g) completing repair and reinforcement of the concrete structure by cutting and removing an end of the anchor bolt of the set anchor when curing of the repairing cement mortar is completed,

wherein the repairing cement mortar is injected into the openings formed at the reinforcing channels of the reinforcing panel such that the reinforcing panel and the concrete structure are integrated as a whole when the repairing cement mortar is completely cured, and

wherein the openings of the reinforcing channels of the reinforcing grid are located on a side of the reinforcing panel, the side of the reinforcing panel faces the repair cross section, and a shape of each of the openings has a width decreasing in a direction toward the repair cross section.

2. The method of claim 1, wherein the reinforcing panel comprises:

the reinforcing grid comprises the reinforcing spacers and the reinforcing channels, and the reinforcing grid is formed by connecting the reinforcing spacers to the reinforcing channels at intervals and in the grid shape through welding; and

a panel-forming mortar deposited on the reinforcing grid to embed the reinforcing grid, and

the repairing cement mortar is injected into the openings.

3. The method of claim 1, wherein the reinforcing panel is precast-fabricated to have embossing, intaglio, or color in a fabricating place.

4. The method of claim 1, wherein one side of the anchor bolt is fastened to the drilled hole for the set anchor of the concrete structure and the anchor bolt passes through a through hole and is exposed outside when the reinforcing panel is pressed in;

and

the anchor nut is fastened to the anchor bolt to additionally apply the pressure to the reinforcing panel, wherein the anchor bolt guides the reinforcing panel to fit into the repair cross section of the concrete structure while the reinforcing panel is pressed to the repair cross section.

5. The method of claim 4, wherein an end of the anchor bolt exposed outside after the reinforcing panel is pressed in the repair cross section of the concrete structure and fastened to the anchor nut is cut and removed.

6. The method of claim 4, further comprising:

forming a set anchor-embedding groove on an external surface of the reinforcing panel;

and finishing the set anchor-embedding groove with set anchor-embedding mortar.

7. The method of claim 1, wherein the repairing cement mortar is a flowable repairing material injected at high pressure between the repair cross section of the concrete structure and the reinforcing panel and is filled in the openings of the reinforcing channels and microcracks present in the repair cross section.