US 8,943,774 B2Granted

Methods and apparatus for restoring, repairing, reinforcing and/or protecting structures using concrete

AssigneeCFS Concrete Forming Systems Inc.

InventorsGeorge David Richardson, Semion Krivulin, Jorge Ricardo Rosas-Gracida, Zi Li Fang

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Abstract

Methods are provided for repairing an existing structure to cover at least a portion of the existing structure with a repair structure. Such methods comprise mounting one or more standoff retainers to the existing structure; coupling one or more standoffs to the standoff retainers such that the standoffs extend away from the existing structure; coupling one or more cladding panels to the standoffs such that the panels are spaced apart from the structure to provide a space therebetween; and introducing a curable material to the space between the panels and the existing structure, the panels acting as at least a portion of a formwork for containing the curable material until the curable material cures to provide a repair structure cladded, at least in part, by the panels. Corresponding apparatus for effecting such methods are also provided.

Claims45

Dependent claims

An apparatus for repairing an existing structure to cover at least a portion of the existing structure with a repair structure, the apparatus comprising:

one or more standoff retainers mounted to the existing structure;
one or more standoffs coupled to the standoff retainers, the standoffs extending away from the existing structure;
one or more panels coupled to the standoffs at one or more locations spaced apart from the existing structure to provide a space between the panels and the existing structure;
wherein:
curable material is introduced to the space between the panels and the existing structure and the panels, retained from moving outwardly relative to the existing structure by the coupling of the panels to the standoffs, the coupling of the standoffs to the standoff retainers and the mounting of the standoff retainers to the existing structure, act as at least a portion of a formwork for containing the curable material until the curable material cures to provide a repair structure cladded, at least in part, by the panels;
the existing structure comprises a concrete structure;
wherein the standoff retainers comprise:
rebar;
and
a plurality of rebar retainers formed separately from the existing structure, each rebar retainer comprising a structure-engaging feature coupled to the existing structure and a rebar-engaging feature;
and
wherein the one or more standoffs are coupled to the standoff retainers by the rebar which is engaged in the rebar-engaging features of two or more of the rebar retainers and which extends in directions generally aligned with a surface of the portion of the existing structure and through apertures in the standoffs.

9 more elements

A method for repairing an existing structure by covering at least a portion of the existing structure with a repair structure, the method comprising:

mounting one or more standoff retainers to the existing structure;
coupling one or more standoffs to the standoff retainers, the standoffs extending away from the existing structure;
coupling one or more panels to the standoffs at one or more corresponding locations spaced apart from the existing structure to provide a space between the panels and the existing structure;
introducing a curable material to the space between the panels and the existing structure, the panels, retained from moving outwardly relative to the existing structure by the coupling of the panels to the standoffs, the coupling of the standoffs to the standoff retainers and the mounting of the standoff retainers to the existing structure, acting as at least a portion of a formwork for containing the curable material until the curable material cures to provide a repair structure cladded, at least in part, by the panels;
wherein the existing structure comprises a concrete structure;
wherein the standoff retainers comprise:
rebar;
and a plurality of rebar retainers formed separately from the existing structure, each rebar retainer comprising a structure-engaging feature and a rebar-engaging feature;
and
wherein mounting the one or more standoff retainers to the existing structure comprises coupling the structure-engaging feature of each rebar retainer to the existing structure;
and
wherein coupling the one or more standoffs to the standoff retainers comprises engaging the rebar in the rebar-engaging features of two or more of the rebar retainers and extending the rebar in directions generally aligned with a surface of the portion of the existing structure and through apertures in the standoffs.

9 more elements

Dependencies are inferred from the claim text.

Facts

Application: 12/794,607Filed 4 Jun 2010 · continuation in part
Priority: 27 Apr 2009
Published: US 2011/0131914 A19 Jun 2011
Granted: 3 Feb 2015
Term ends: Not estimatedThe source records don’t support an estimate.

Classification6 codes

E04G 23/0218
Repairing, e.g. filling cracks; Restoring; Altering; Enlarging: increasing or restoring the load-bearing capacity of building construction elements
E02D 37/00
Repair of damaged foundations or foundation structures
E04G 23/02
Working measures on existing buildings,: repairing, e.g. filling cracks; Restoring; Altering; Enlarging
E04G 23/0203
Repairing, e.g. filling cracks; Restoring; Altering; Enlarging: arrangements for filling cracks or cavities in building constructions

Family

Application61/173,151Us provisional application · filed 27 Apr 2009
Application61/223,378Us provisional application · filed 6 Jul 2009
PCT/CA2010/000003Parent of this continuation-in-part · filed 7 Jan 2010
US 2011/0131914 A1Pre-grant publication · published 9 Jun 2011
US 8,943,774 B2This patent

From the US filing history. Foreign family members aren’t listed.