Abstract: An existing concrete structure is repaired by covering at least a portion of the existing structure with a repair structure. Standoff retainers (each comprising an elongated member, fastener-receiving features and standoff-engaging curves) are mounted to the existing structure. Fasteners extend through the one or more fastener-receiving features and into the existing structure. Standoffs are coupled to the standoff retainers and extend away from the existing structure by extending the elongated members through apertures in the standoffs and locating each of the standoffs at a location of one of the standoff-engaging curves. Panels are coupled to the standoffs at locations spaced apart from the existing structure. Curable material is introduced to the space between the panels and the existing structure. The panels act as a formwork for containing the curable material until the curable material cures to provide a repair structure cladded by the panels.

Abstract: A stay-in-place lining is provided for lining a structure fabricated from concrete. The lining comprises a plurality of panels connectable via complementary connector components on their longitudinal edges. Each panel comprises a first connector component on a first longitudinal edge thereof and a second (complementary) connector component on a second longitudinal edge thereof. The lining comprises at least one edge-to-edge connection between the first connector component of a first panel and the second connector component of a second panel, the edge-to-edge connection comprising a protrusion of the first panel extended into a receptacle of the second panel through a receptacle opening. The receptacle is shaped to prevent removal of the protrusion from the receptacle and the receptacle is resiliently deformed by the extension of the protrusion into the receptacle to thereby apply a restorative force to the protrusion to maintain the edge-to-edge connection.

Abstract: A formwork apparatus for forming a concrete structure comprises a plurality of elongated panels comprising connector components at their transverse edges for connecting to one another in edge-adjacent relationship. Each one of the elongated panels comprises an outer surface that extends between its transverse edges and an inner surface that extends between its transverse edges at a location inwardly spaced apart from the outer surface. The inner surface comprises one or more inwardly projecting convexities that extend between the transverse edges. The inwardly projecting convexities may comprise arcuate-shaped surfaces. The inwardly projecting convexities may comprise a plurality of transversely adjacent convexities. There may be brace elements that extend part way between or all the way between the outer and inner surfaces.

Abstract: Apparatus covering at least a portion of a surface of an existing structure with a repair structure comprise: a plurality of longitudinally and transversely extending panels connected to one another in edge-adjacent relationship; and a plurality of standoffs connected to the panels and extending from the panels toward the existing structure. Each panel comprises a panel connector component which extends longitudinally along the panel and from an interior surface of the panel toward the existing structure, and each standoff comprises a standoff connector component complementary to the panel connector component. The connector components are shaped such that a connection formed therebetween comprises deformation of at least one of the panel connector component and the standoff connector component and creates corresponding restorative deformation forces that prevent relative movement between the panel and the standoff under the force of gravity.

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.

Abstract: Apparatus covering at least a portion of a surface of an existing structure with a repair structure comprise: a plurality of longitudinally and transversely extending panels connected to one another in edge-adjacent relationship; and a plurality of standoffs 10 connected to the panels and extending from the panels toward the existing structure. Each panel comprises a panel connector component which extends longitudinally along the panel and from an interior surface of the panel toward the existing structure, and each standoff comprises a standoff connector component complementary to the panel connector component. The connector components are shaped such that a 1 connection formed therebetween comprises deformation of at least one of the panel connector component and the standoff connector component and creates corresponding restorative deformation forces that prevent relative movement between the panel and the standoff under the force of gravity.

Abstract: A key for assembling at least a portion of a stay-in-place form-work for casting a structure from concrete or other curable construction materials. The stay-in-place form-work comprises a first elongate panel comprising a first edge component and a second elongate panel comprising a second edge component. The first and second panels are connectable in an edge-to-edge relationship wherein the first and second edge components engage one another. The key comprises a plurality of connector components for slidable engagement with complementary panel connector components on at least one of the first and second panels and a locking component for forcing the first and second edge components into a locked configuration as the key is moved longitudinally relative to the first and second panels while slidably engaged thereto.

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.

Abstract: An apparatus for a formwork assembly comprises a plurality of elongated panels connectable to one another in edge-adjacent relationship. The plurality of panels comprise first and second edge-adjacent panels connectable to one another at a connection between a male connector component of the first panel and a female connector component of the second panel. The female connector component comprises a female engagement portion which defines a principal receptacle and the male connector component comprises a male engagement portion which is received in the principal receptacle to form the connection. The female connector component comprises a first abutment portion and the male connector component comprising a second abutment portion which abuts against the first abutment portion to form the connection. The first and second abutment portions are located outside of the principal receptacle.

Abstract: An apparatus for a stay-in-place form assembly comprises a plurality of elongated panels connectable to one another in edge-to-edge relationship. The plurality of panels comprise first and second panels connectable to one another at a connection between a generally male connector component of the first panel and a generally female connector component of the second panel. The generally female connector component comprises a female engagement portion which defines a principal receptacle and the generally male connector component comprises a male engagement portion which is received in the principal receptacle to form the connection. The generally female connector component comprises a first abutment portion and the generally male connector component comprises a second abutment portion which abuts against the first abutment portion to form the connection. The first and second abutment portions are located outside of the principal receptacle.

Abstract: An apparatus for a stay-in-place form assembly comprises a plurality of elongated panels connectable to one another in edge-to-edge relationship. The plurality of panels comprise first and second panels connectable to one another at a connection between a generally male connector component of the first panel and a generally female connector component of the second panel. The generally female connector component comprises a female engagement portion which defines a principal receptacle and the generally male connector component comprises a male engagement portion which is received in the principal receptacle to form the connection. The generally female connector component comprises a first abutment portion and the generally male connector component comprises a second abutment portion which abuts against the first abutment portion to form the connection. The first and second abutment portions are located outside of the principal receptacle.

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.

Abstract: Apparatus covering at least a portion of a surface of an existing structure with a repair structure comprise: a plurality of longitudinally and transversely extending panels connected to one another in edge-adjacent relationship; and a plurality of standoffs 10 connected to the panels and extending from the panels toward the existing structure. Each panel comprises a panel connector component which extends longitudinally along the panel and from an interior surface of the panel toward the existing structure, and each standoff comprises a standoff connector component complementary to the panel connector component. The connector components are shaped such that a 1 connection formed therebetween comprises deformation of at least one of the panel connector component and the standoff connector component and creates corresponding restorative deformation forces that prevent relative movement between the panel and the standoff under the force of gravity.

Abstract: A key for assembling at least a portion of a stay-in-place form-work for casting a structure from concrete or other curable construction materials. The stay-in-place form-work comprises a first elongate panel comprising a first edge component and a second elongate panel comprising a second edge component. The first and second panels are connectable in an edge-to-edge relationship wherein the first and second edge components engage one another. The key comprises a plurality of connector components for slidable engagement with complementary panel connector components on at least one of the first and second panels and a locking component for forcing the first and second edge components into a locked configuration as the key is moved longitudinally relative to the first and second panels while slidably engaged thereto.

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.

Abstract: A stay-in-place lining is provided for lining a structure fabricated from concrete. The lining comprises a plurality of panels connectable via complementary connector components on their longitudinal edges. Each panel comprises a first connector component on a first longitudinal edge thereof and a second (complementary) connector component on a second longitudinal edge thereof. The lining comprises at least one edge-to-edge connection between the first connector component of a first panel and the second connector component of a second panel, the edge-to-edge connection comprising a protrusion of the first panel extended into a receptacle of the second panel through a receptacle opening. The receptacle is shaped to prevent removal of the protrusion from the receptacle and the receptacle is resiliently deformed by the extension of the protrusion into the receptacle to thereby apply a restorative force to the protrusion to maintain the edge-to-edge connection.

Abstract: An apparatus for a formwork assembly comprises a plurality of elongated panels connectable to one another in edge-adjacent relationship. The plurality of panels comprise first and second edge-adjacent panels connectable to one another at a connection between a male connector component of the first panel and a female connector component of the second panel. The female connector component comprises a female engagement portion which defines a principal receptacle and the male connector component comprises a male engagement portion which is received in the principal receptacle to form the connection. The female connector component comprises a first abutment portion and the male connector component comprising a second abutment portion which abuts against the first abutment portion to form the connection. The first and second abutment portions are located outside of the principal receptacle.

Abstract: A formwork apparatus for forming a concrete structure comprises a plurality of elongated panels comprising connector components at their transverse edges for connecting to one another in edge-adjacent relationship. Each one of the elongated panels comprises an outer surface that extends between its transverse edges and an inner surface that extends between its transverse edges at a location inwardly spaced apart from the outer surface. The inner surface comprises one or more inwardly projecting convexities that extend between the transverse edges. The inwardly projecting convexities may comprise arcuate-shaped surfaces. The inwardly projecting convexities may comprise a plurality of transversely adjacent convexities. There may be brace elements that extend part way between or all the way between the outer and inner surfaces.

Abstract: Methods and apparatus are provided for lining one or more surfaces of concrete structures during fabrication thereof. A structure-lining apparatus comprises a plurality of structure-lining panels and a plurality of concrete-anchoring components. The panels, which may extend in longitudinal and transverse directions, are interconnected to one another in edge-to-edge relationship at their transverse edges to line at least a portion of the interior of the structural form. The concrete-anchoring components extend in an inward/outward direction from the panels. The concrete-anchoring components may: be integrally formed with the panels; connect to the panels via suitably configured connector components; and/or connect edge-adjacent panels to one another. The concrete-anchoring components may comprise concrete-anchoring features which may extend in the longitudinal and transverse directions (e.g. in a plane parallel to the panels) to provide concrete-anchoring surfaces.

Abstract: A stay-in-place form-work for casting a concrete structure comprises a plurality of elongate panels interconnectable in edge-to-edge relationship via complementary connector components on their longitudinal edges to define at least a portion of a perimeter of the form-work. The panels include a first panel having a first connector component incorporating a receptacle, and a second panel having a second connector component incorporating a protrusion. The first and second panels are connectable to one another in edge-to-edge relationship by: effecting a loose-fit connection by extending the protrusion of the second connector component into the receptacle of the first connector component; loosely seating a clip onto the first and second connector components; and pushing the clip against the first and second connector components to reach a locked configuration wherein restorative deformation forces associated with the clip act to retain the first and second connector components in the locked configuration.