JP2023010118A - Reinforcement panel of concrete structure and reinforcement structure - Google Patents

Abstract

To provide a reinforcement panel of a concrete structure which has favorable design, and can reduce construction labor and cost.SOLUTION: A reinforcement panel of a concrete structure is a reinforcement panel 2 obtained by laminating a wood part 10, a wooden board part 20, a carbon fiber sheet part 30, and a flexible board part 40 in this order from a surface side, wherein the wooden board part 20 includes impermeability for preventing permeation of an agent from a lower layer side. A reinforcement structure of a concrete structure can be formed in which a gap S is provided between adjacent reinforcement panels 2, 2, and a cover panel 70 for connection is arranged in the gap S.SELECTED DRAWING: Figure 1

Description

The present invention relates to reinforcement panels and reinforcement structures for concrete structures.

As a reinforcing panel for reinforcing a concrete structure such as an existing concrete pillar, there is one disclosed in Patent Document 1. The reinforcing panel of Patent Document 1 is a panel in which a carbon fiber sheet is sandwiched between flexible boards. The use of such reinforcing panels has the advantage of requiring less on-site work (suitable for reinforcement while the building is still in place) and requiring no interior foundation (smaller pillar width) than on-site carbon fiber sheet seismic reinforcement. .

JP 2013-19138 A

Although the reinforcing panel of Patent Document 1 can be expected to improve the seismic performance, there is a problem that the finished product lacks design. For this reason, it was difficult to adopt it for reinforcement work of exposed structural members in spaces that require a high degree of design, such as commercial facilities and hotel lobbies and entrances. Since the sealing treatment remains on the surface of the reinforcing panel, if it is used for reinforcement work that requires design, it is necessary to perform further finishing work on the reinforcing panel, which is disadvantageous in terms of both cost and construction period. was holding
From such a point of view, an object of the present invention is to provide a reinforcing panel and a reinforcing structure for a concrete structure that are good in design and that can reduce construction labor and costs.

The present invention for solving such problems is a reinforcing panel in which a wooden part, a wooden board part, a carbon fiber sheet part, and a flexible board part are laminated in order from the surface side, and the wooden board part is on the lower layer side A reinforcement panel for a concrete structure, characterized in that it is impermeable to prevent the penetration of chemicals from the concrete.
According to the reinforcing panel of the concrete structure according to the present invention, since the wooden part is provided on the surface, the design is improved, and the finishing work can be omitted or simplified, so that the construction work and cost are reduced. Moreover, since the impermeable wooden board portion that prevents permeation of the chemical agent from the lower layer side is provided on the back side of the wooden portion, it is possible to prevent the chemical agent from seeping into the wooden portion. Furthermore, since the wooden part and the wooden board part have similar deformation rates, it is possible to suppress the wooden part from being along or peeled off.

A second aspect of the present invention for solving the above problems is a reinforcing structure for a concrete structure formed by bonding a plurality of reinforcing panels for a concrete structure according to claim 1 to the surface of the concrete structure. Such a reinforcing structure has a gap between the adjacent reinforcing panels, and a connecting cover panel is arranged in the gap. In the end of the reinforcing panel, the end of the wooden board portion is longer than the end of the wood portion, and the end of the flexible board portion is longer than the end of the wooden board, and the carbon fiber sheet The portion has a length extending outside the end of the flexible board portion. In the cover panel, a wooden board part is laminated on the back surface of the wooden part, and the end part of the cover panel projects from the end part of the wooden board part, and the overhang length is , and corresponds to the length of protrusion of the end of the wooden board portion of the reinforcing panel from the end of the wood portion.
According to the reinforcing structure of the concrete structure according to the present invention, the wooden part and the wooden board part of the reinforcing panel can be meshed with the wooden part and the wooden board part of the cover panel.
The reinforcement structure for a concrete structure of the present invention includes a plurality of curved panels made up of the reinforcing panels, and a flat plate-like cover panel attached to a connecting portion between the curved panels, wherein the curved panels are: It is preferable that a bent portion covering a corner portion of the concrete structure is provided, and the bent panels have a U-shaped cross section and are provided in pairs so as to sandwich the concrete structure having a rectangular cross section from both sides. With such a configuration, the number of parts of the panel is reduced, so that the labor and cost for construction can be further reduced.
A third aspect of the present invention for solving the above-mentioned problems is a reinforcing structure for a concrete structure that reinforces a concrete structure having a circular or elliptical cross section using the reinforcing panel for the concrete structure according to claim 1 . Such a reinforcing structure includes a plurality of curved panels made up of the reinforcing panels, and a plate-like cover panel attached to a connecting portion between the curved panels. The curved panel has a curved portion that covers the curved portion of the concrete structure, and the carbon fiber sheet portions of the curved panels that are adjacent in the lateral direction overlap and project beyond the tip of the flexible board portion. The flexible board portions of the laterally adjacent curved panels protrude beyond the tips of the wooden board portions, and a first gap is formed between the adjacent wooden board portions to form the laterally adjacent curved panels. The wooden board portion of the panel protrudes from the tip of the wooden portion, a second gap is formed between the adjacent wooden portions, and the cover panel is a wooden board inserted into the first gap. and a wooden part inserted into the second gap, and the thickness dimension of the wooden board part of the cover panel is smaller than the thickness dimension of the wooden board part of the curved panel. It is characterized by
According to the reinforcement structure for a concrete structure according to the present invention, even if the concrete structure has a circular or elliptical cross section, it is possible to increase the joint strength between the curved panels. Furthermore, the outer surfaces of the curved panel and the cover panel can be made flush.
In the reinforcing structure of a concrete structure according to the present invention, it is preferable that the curved panels have an arc-shaped cross section and are provided in pairs so as to sandwich the concrete structure having a rectangular cross section from both sides. With such a configuration, the number of parts of the panel is reduced, so that the labor and cost for construction can be further reduced.
In the reinforcing structure of a concrete structure of the present invention, the vertically adjacent wooden board portions are arranged with a gap therebetween, and the gap includes a connection portion between the vertically adjacent carbon fiber sheet portions. It is preferable that a contacting backup material is interposed. According to such a configuration, since the adhesive on the carbon fiber sheet portion is held down by the backup material, the adhesive does not flow out to the wooden portion.
In the reinforcing structure of the concrete structure of the present invention, the connecting portion between the adjacent wooden board portions and the connecting portion between the adjacent wooden portions are offset, and the adjacent wooden portions are separated from each other by a gap. Spaced arrangement is preferred. According to such a configuration, since the gap is formed between the wooden parts, it is possible to absorb the dimensional change of the wooden part due to the change in humidity. In addition, since the wooden board part exists in the depth of the gap between the wooden parts, the backup material and the carbon fiber sheet part cannot be seen from the outside, and deterioration of the design can be prevented.

According to the reinforcing panel and the reinforcing structure of the concrete structure of the present invention, the designability is improved, and the construction labor and cost can be reduced.

1 is a perspective view showing reinforcing panels and a reinforcing structure of a concrete structure according to an embodiment of the present invention; FIG. 1 is a cross-sectional view showing a reinforcement panel and a reinforcement structure of a concrete structure according to an embodiment of the invention; FIG. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a diagram showing an assembled state of a reinforcing structure for a concrete structure according to an embodiment of the present invention, where (a) is a cross-sectional view showing a state before a bending panel is installed on a concrete pillar, and (b) is a cover; It is sectional drawing which showed the state before installing a panel in a concrete pillar. 1A is an enlarged cross-sectional view showing a state in which carbon fiber sheet portions at the ends of bending panels are overlapped; FIG. (b) is an enlarged cross-sectional view showing a state in which the cover panel is installed. FIG. 4A is an enlarged cross-sectional view showing the state before connection, and FIG. ) is an enlarged sectional view showing a state after connection.

Reinforcing panels and reinforcing connections of concrete structures according to embodiments of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a perspective view showing reinforcing panels and a reinforcing structure of a concrete structure according to an embodiment of the present invention, and FIG. 2 is a cross-sectional view. In the present embodiment, the reinforcement panel 2 and the reinforcement structure 3 of the concrete structure 1 will be described by taking as an example the case where the concrete structure 1 to be reinforced is a pillar made of reinforced concrete. In the following description, the directions of up, down, front, back, left, and right are directions when the column is viewed from the front side (see FIG. 1).
As shown in FIGS. 1 and 2, the reinforcement panel 2 is attached to the outer surface of the concrete structure 1. As shown in FIG. In this embodiment, the concrete structure 1 is a concrete column having a rectangular cross section, and a reinforcing panel 2 is provided around the entire outer peripheral surface of the concrete structure 1 .

In the reinforcing panel 2, a wooden part 10, a wooden board part 20, a carbon fiber sheet part 30, and a flexible board part 40 are laminated in order from the surface side.
The wooden part 10 is made of a plate made of natural wood such as Japanese cedar, and has a good design with a wood grain appearing on the surface. The wooden part 10 is made up of a plurality of siding boards 11 formed in the shape of vertically long strips, which are arranged in the horizontal direction and attached to the surface of the wooden board part 20 . The end faces of laterally adjacent siding boards 11 are connected in a tongue-shaped state. The shape of the end surface of the siding planks 11 is not limited to a tongue-and-groove shape. The surface of the wooden part 10 is coated with varnish or stain, for example. That is, the surface of the wooden part 10 is protected while making use of the wood grain.
The wooden board portion 20 is, for example, a fiber board made of wood, or a particle board made by applying a synthetic resin adhesive to small pieces of wood and molding them under heat and pressure. The wooden board portion 20 is adhered to the carbon fiber sheet portion 30 with an epoxy resin adhesive. The wooden board portion 20 has a higher density than the natural wood that forms the wooden portion 10 and has a lower liquid permeability. The wooden board portion 20 is free from permeation of the epoxy resin (adhesive) impregnated in the carbon fiber sheet portion 30 described below and the filler 50 filled between the flexible board portion 40 and the concrete structure portion 1. have density. In other words, the wooden board portion 20 is impermeable to prevent permeation of chemicals (adhesive and filler 50) from the lower layer side. Therefore, the wooden board portion 20 prevents the epoxy resin and the filler 50 from penetrating into the wooden portion 10 .

The carbon fiber sheet portion 30 is a portion that substantially reinforces the concrete structure 1 and includes a carbon fiber sheet 31 and an epoxy resin 32 . A plurality of carbon fiber sheets 31 are laminated to cover the flexible board portion 40 . The epoxy resin 32 integrates the group of carbon fiber wires forming the carbon fiber sheet 31 and prevents the wires from breaking individually when a load acts on the carbon fiber sheet 31 . Furthermore, the epoxy resin 32 is for fixing the multiple layers of the carbon fiber sheets 31 to each other, and is impregnated into the carbon fiber sheets 31 . The epoxy resin 32 is filled in a factory and carried out in a solidified state. The vertical end portions of the carbon fiber sheet portion 30 are formed flat, and the end surfaces of the vertically adjacent carbon fiber sheet portions 30, 30 are butted against each other (see FIG. 5(b)).
At the lateral ends of the carbon fiber sheet portion 30, the carbon fiber sheet 31 is not impregnated with the epoxy resin 32 before installation (see FIG. 3(a)). The epoxy resin 32 is filled up to a position corresponding to the edge of the wooden board portion 20, and the carbon fiber sheet 31 protrudes from there. The carbon fiber sheet 31 protrudes further than the tip of the flexible board portion 40 . The protruding end of the carbon fiber sheet 31 is overlapped with the carbon fiber sheet 31 of the adjacent reinforcing panel 2 when attached to the concrete structure 1, and the periphery thereof is filled with epoxy resin 32 on site (Fig. 3). (b)).
The height dimension of the reinforcing panel 2 is set according to the roll height (for example, 500 mm) of the carbon fiber sheet 31 .

The flexible board portion 40 is a portion that faces the surface of the concrete structure 1 and is composed of a flexible board that is a noncombustible board made mainly of cement and reinforcing fibers. A gap having a predetermined thickness is formed between the flexible board portion 40 and the concrete structure 1 , and the gap is filled with a filler 50 .
The filler 50 adheres the flexible board portion 40 to the concrete structure 1, and is made of, for example, non-shrinkable mortar or epoxy resin adhesive. The filling material 50 is filled through a filling hole 51 (see FIG. 2) penetrating from the outer surface to the inner surface of the reinforcing panel 2 . At least two filling holes 51 are provided, at least one of which is for filling the filler 50 and the other for air venting. After the filling material 50 is filled, a wooden plug 52 made of the same material as that of the wooden portion 10 is fitted into the surface-side end portion of the filling hole 51 .
Both ends of the flexible board portion 40 in the vertical direction are formed flat at the same height as the carbon fiber sheet portion 30, and the end surfaces of the flexible board portions 40, 40 adjacent to each other in the vertical direction are butted against each other (Fig. 5 (b)). Both lateral ends of the flexible board portion 40 are flattened, and the end surfaces of the laterally adjacent flexible board portions 40, 40 are butted against each other (see FIG. 4).

The connecting portion between adjacent wood portions 10 and 10 and the connecting portion between adjacent wooden board portions 20 and 20 are offset. The wooden parts 10, 10 adjacent to each other are arranged with a gap therebetween, and one wooden board part 20 is positioned behind the gap between the wooden parts 10, 10.例文帳に追加In other words, the peripheral edge portions of the wooden portion 10 and the wooden board portion 20 are offset from each other and form a real shape (a tongue shape) in which one protrudes. At the lateral end of the reinforcing panel 2, as shown in FIG. 4, one end of the wooden part 10 and the wooden board part 20 protrudes from the other end. At the lower edge of the reinforcing panel 2, the lower end of the wooden board portion 20 protrudes below the lower end of the wood portion 10, as shown in FIG. At the upper end edge of the reinforcing panel 2 , the upper end of the wooden part 10 protrudes above the lower end of the wooden board part 20 .

As shown in FIG. 5, a backup material 21 is installed on the upper end of the wooden board portion 20 . That is, the wooden board portions 20, 20 adjacent to each other in the vertical direction are arranged with a gap therebetween, and the backup material 21 is interposed in the gap. The backup material 21 is a member that prevents the filler material 50 from flowing out to the wood part 10 side at the connecting portion of the reinforcing panel 2 in the vertical direction. The backup material 21 has a height corresponding to the butted portion of the carbon fiber sheet portion 30 and the flexible board portion 40 in the vertical direction so as to contact the connection portion (joint) between the carbon fiber sheet portions 30, 30 adjacent to each other in the vertical direction. It is placed in the vertical position. Such a backup material 21 presses the filler 50 that has flowed into the joint between the carbon fiber sheet portions 30 from the outside.
As shown in FIG. 2, the reinforcement panel 2 is formed with through holes 55 passing through the wooden portion 10, the wooden board portion 20, the carbon fiber sheet portion 30, and the flexible board portion 40 from the outer surface to the inner surface. It is Anchor members 56 are inserted into the through holes 55 , and the reinforcing panel 2 is positioned on the concrete structure 1 via the anchor members 56 . A wooden plug 52 made of the same material as that of the wooden portion 10 is fitted to the surface-side end portion of the through hole 55 .

Next, the reinforcing structure 3 of the concrete structure 1 will be explained. The reinforcing structure 3 according to this embodiment is a reinforcing structure that reinforces the concrete structure 1 having a rectangular cross section. FIG. 3 is a sectional view showing an assembled state of the reinforcing structure 3 of the concrete structure 1. As shown in FIG. FIG. 4 is an enlarged cross-sectional view of a main part showing an assembled state of the reinforcing structure 3 of the concrete structure 1. As shown in FIG. As shown in FIG. 3, the reinforcement structure 3 comprises a bending panel 60 and a cover panel 70. As shown in FIG.
The bent panel 60 of the present embodiment is bent at a factory, and includes bent portions 61 that cover the corners of the pillar (concrete structure 1). Two bending portions 61 are provided, and the bending panel 60 is U-shaped in plan view. A pair of bending panels 60 are provided so as to sandwich the concrete structure 1 having a rectangular cross section from both left and right sides, and the ends thereof are joined to each other.
As shown in FIG. 4(a), the flexible board portions 40 of the bending panels 60 adjacent in the lateral direction are butted against each other. The carbon fiber sheet portion 30 has a length such that its tip portion extends outside the tip portion of the flexible board portion 40 . The carbon fiber sheets 31 projecting from the tip of the flexible board portion 40 are alternately overlapped with the carbon fiber sheets 31 projecting from the tip of the flexible board portion 40 of the other adjacent bending panel 60 . When the carbon fiber sheets 31 are superimposed on each other, the epoxy resin 32 is sequentially applied between the carbon fiber sheets 31 at the construction site to adhere them. The carbon fiber sheet portion 30 formed at the construction site (connecting portion of the carbon fiber sheet portions 30 of the bending panels 60 adjacent to each other in the left and right direction) has a thickness dimension larger than that of the carbon fiber sheet portion 30 formed at the factory. .
The flexible board portion 40 protrudes from the tip of the wooden board portion 20 toward the other bending panel 60 . That is, the end of the flexible board 40 protrudes longer than the end of the wooden board 20 . A first gap S1 is formed between adjacent wooden board portions 20 . The wooden board portion 20 protrudes from the tip of the wooden portion 10 toward the other bent panel 60 . That is, the ends of the wooden board portion 20 are longer than the ends of the wooden portion 10 . A second gap S2 is formed between adjacent wooden parts 10 . The first gap S1 and the second gap S2 are continuous, and the lateral length of the first gap S1 is smaller than the lateral length of the second gap S2. That is, a gap S having a convex cross-section is formed between the tip portions of the wooden board portion 20 and the wood portion 10 adjacent to each other, the middle portion of which protrudes toward the concrete structure 1 side. That is, a gap S is formed between the reinforcing panels 2, 2 forming the adjacent bending panels 60, 60, and the cover panel 70 for connection is arranged in this gap S. As shown in FIG.

The cover panel 70 is a panel attached to the connecting portion between the bending panels 60, 60 and has a flat plate shape. The cover panel 70 is configured by overlapping a wooden board portion 71 inserted into the first gap S1 and a wooden portion 72 inserted into the second gap S2. The lateral length of the wooden board portion 71 of the cover panel 70 is shorter than the lateral length of the first gap S1, and gaps are formed between the wooden board portion 71 and the wooden board portion 20 at both ends thereof. The thickness dimension of the wooden board portion 71 of the cover panel 70 is smaller than the thickness dimension of the wooden board portion 20 of the bending panel 60 . The difference between the thickness of the wooden board portion 71 and the thickness of the wooden board portion 20 is the thickness of the carbon fiber sheet portion 30 formed by applying the epoxy resin 32 at the construction site and the carbon fiber sheet portion formed at the factory. Equivalent to a thickness difference of 30.
The lateral length of the wood portion 72 of the cover panel 70 is shorter than the lateral length of the second gap S2, and a gap of 1 to 2 mm is formed at both ends of the wood portion 72 to serve as a joint between the wood portion 10 and the wood portion 10. be done. Wood portion 72 of cover panel 70 is the same thickness as wood portion 10 of flex panel 60 .
In other words, at the end of the cover panel 70 , the end of the wooden part 72 protrudes from the end of the wooden board part 71 . It corresponds to the overhang length from the end of the wooden part 10 of the end.
A through hole 75 is formed in the cover panel 70 so as to pass through the wooden part 10 and the wooden board part 20 from the outer surface to the inner surface. A through hole 55 is formed in the carbon fiber sheet portion 30 and the flexible board portion 40 of the bending panel 60 inside the cover panel 70 at a position coaxial with the through hole 75 . Anchor members 56 are inserted through the through holes 75 and 55 , and the reinforcing panel 2 is fixed to the concrete structure 1 via the anchor members 56 . A wooden plug 52 made of the same material as that of the wooden portion 10 is fitted to the surface-side end portion of the through hole 75 .

Next, the effects of this embodiment will be described. According to the reinforcement panel 2 and the reinforcement structure 3 of the concrete structure 1 of the present embodiment, since the wooden part 10 having wood grain is provided on the outer peripheral surface, the concrete structure 1 can be strengthened simply by installing the reinforcement panel 2. Designability is improved. In addition, since the surface finishing work for improving the design can be omitted or simplified, construction work and costs are reduced compared to finishing work on the surface of the conventional reinforcing panel where the flexible board is exposed on the surface. reduced. Moreover, since the wooden plugs 52 are fitted into the filling hole 51 and the through holes 55 and 75 of the wooden part 10, deterioration of the design can be suppressed.
Since the wooden board portion 20 is provided inside the wooden portion 10 with a density that does not cause penetration of the adhesive or the filler 70, the epoxy resin 32 of the carbon fiber sheet portion 30 and the filler 50 inside the flexible board portion 40 are used. However, it is possible to prevent exudation into the wooden part 10 beyond the wooden board part 20.例文帳に追加
Furthermore, since the wooden board portion 20 having a deformation rate close to that of the wooden portion 10 is provided inside the wooden portion 10, the wooden portion 10 can be prevented from being warped or peeled off.

Between the wooden board portions 20, 20 adjacent in the vertical direction, a backup material 21 is interposed that contacts the connecting portion (joint) between the carbon fiber sheet portions 30, 30, so that the vertically adjacent flexible board Even if the filling material 50 flows out along between the portions 40 and 40 and between the carbon fiber sheet portions 30 and 30, the backup material 21 can stop it. Therefore, the adhesive does not flow out to the wooden part 10, and the design is not deteriorated.
Moreover, since a gap is provided between the adjacent wooden parts 10, 10, it is possible to absorb the dimensional change of the wooden part 10 due to a change in humidity or the like. Furthermore, since the connecting portion (joint) between the adjacent wood portions 10 and 10 and the connecting portion (joint) between the adjacent wooden board portions 20 and 20 are offset, the joint between the wooden portions 10 and 10 A wooden board portion 20 exists in the back of the . As a result, the backup material 21 and the carbon fiber sheet portion 30 are not visible from the outside, and deterioration of the design can be prevented.
According to the reinforcing structure 3 of the concrete structure 1 of this embodiment, the carbon fiber sheets 31 of the carbon fiber sheet portions 30 of the adjacent bending panels 60, 60 are alternately overlapped, and the epoxy resin 32 is applied around them. Therefore, the continuity of the carbon fiber sheet 31 can be ensured even at the joints between the bending panels 60 .

Moreover, since the surface of the reinforcing structure 3 is uniformly covered with the wood portions 10 and 72, the design can be enhanced. Furthermore, since the wooden board portion 71 of the cover panel 70 is thinner than the wooden board portion 20 of the bending panel 60, the carbon fiber sheet 31 is overlapped at the construction site and the epoxy resin 32 is applied to the carbon fiber sheet. An increase in the thickness of the connecting portion of the portion 30 can be absorbed. As a result, the outer surface of the wooden portion 10 of the bending panel 60 and the outer surface of the wooden portion 72 of the cover panel 70 can be made flush with each other.
A pair of bending panels 60, 60 having a U-shaped cross section are arranged so as to sandwich the concrete structure 1 from both sides, and the cover panel 70 is arranged at the boundary between the bending panels 60, so that construction work and cost can be further reduced. can be further reduced.

Next, the reinforcement panel and reinforcement connection of the concrete structure according to the second embodiment of the present invention will be described. In the above embodiment, the concrete structure 1 to be reinforced is a column with a rectangular cross section, but in this embodiment, the concrete structure to be reinforced is a column with a circular or elliptical cross section. In the above-described embodiment, the reinforcing panel has a flat plate shape, but the reinforcing panel in this embodiment has a curved surface shape along the curved surface of the concrete structure 1 . The siding board forming the wooden part has a flat plate shape, and has a width smaller than that of the siding board 11 of the flat reinforcing panel. The siding boards are attached to the surface of the wooden board part so as to be sequentially inclined along the curved surface. The other wooden board portion, carbon fiber sheet portion, and flexible board portion are formed in a curved shape, and the configurations, materials, and dimensions of each portion other than the curved shape are the same as those of the above-described embodiment.
The reinforcement structure of the concrete structure of this embodiment comprises a curved panel and a cover panel. The curved panel of this embodiment has a curved portion that covers the curved portion of the concrete structure, and has an arc shape in plan view. A pair of curved panels are provided so as to sandwich a concrete structure having a circular cross section from both left and right sides, and the ends thereof are joined to each other. The curved panel is the curved panel 60 of the above-described embodiment, and the basic configuration and connection structure of each part other than the curved surface shape are the same as those of the curved panel 60 . For example, the carbon fiber sheets of the laterally adjacent curved panels overlap each other so as to protrude beyond the tip of the flexible board portion. The flexible board portions of the laterally adjacent curved panels protrude beyond the tips of the wooden board portions, forming a first gap between the adjacent wooden board portions, and the wooden board portions of the laterally adjacent curved panels. protrudes beyond the tips of the wooden parts, and a second gap is formed between the adjacent wooden parts.
The cover panel is a panel attached to the connecting portion between the curved panels and has a curved plate shape. The cover panel is a curved surface of the cover panel 70 of the above-described embodiment, and the basic configuration and connection structure of each part other than the curved surface are the same as those of the cover panel 70 . For example, the cover panel is configured by overlapping a wooden board portion inserted into the first gap and a wooden portion inserted into the second gap. Also, the thickness dimension of the wooden board portion of the cover panel is smaller than the thickness dimension of the wooden board portion of the curved panel.
According to the reinforcing structure of the concrete structure according to the present embodiment, even if the concrete structure has a circular or elliptical cross section, it is possible to increase the joint strength between the curved panels as in the above embodiment. Furthermore, since the outer surfaces of the curved panel and the cover panel can be made flush with each other, the design is improved. Moreover, since a pair of curved panels are provided so as to sandwich the concrete structure from both sides, the number of panel parts can be reduced, and construction work and costs can be reduced.

Although the embodiments for carrying out the present invention have been described above, the present invention is not intended to be limited to the above-described embodiments, and design changes can be made as appropriate without departing from the spirit of the present invention. For example, in the above-described embodiment, at the upper end of the reinforcing panel 2, the wooden part 10 protrudes above the wooden board part 20, and at the lower end, the wooden board part 20 protrudes below the wooden part 10, It may be reversed. That is, the wooden board portion 20 may protrude above the wood portion 10 at the upper end of the reinforcing panel 2 , and the wood portion 10 may protrude below the wood board portion 20 at the lower end of the reinforcing panel 2 . In this case, the backup material 21 is attached to the lower end of the wooden board portion 20 of the reinforcing panel 2 arranged on the upper side, and is arranged inside the wooden portion 10 .
Further, the concrete structure 1 is reinforced by sandwiching the concrete structure 1 from both the left and right sides with the curved panels 60 having a U-shaped cross section, but the present invention is not limited to this. The bending panel may be formed to have an L-shaped cross section and may be shaped to cover the four corners of the concrete structure 1 respectively.
Furthermore, in the above embodiment, the carbon fiber sheet 31 is provided in multiple layers, but when the cross section of the concrete structure 1 is small, the carbon fiber sheet 31 may be a single layer.

Reference Signs List 1 concrete structure 2 reinforcing panel 3 reinforcing structure 10 wooden part 20 wooden board part 21 backup material 30 carbon fiber sheet part 31 carbon fiber sheet 32 epoxy resin 40 flexible board part 50 filler 60 bending panel 61 bending part 70 cover panel 71 wood Board portion 72 Wooden portion 75 Through hole

Claims (7)

A reinforcing panel in which a wooden part, a wooden board part, a carbon fiber sheet part, and a flexible board part are laminated in order from the surface side,
A reinforcing panel for a concrete structure, wherein the wooden board part is impermeable to prevent permeation of chemicals from the lower layer side. A reinforcing structure for a concrete structure formed by bonding a plurality of reinforcing panels for a concrete structure according to claim 1 to a surface of a concrete structure,
A gap is provided between the adjacent reinforcing panels, and a cover panel for connection is arranged in the gap,
In the end of the reinforcing panel, the end of the wooden board portion is longer than the end of the wood portion, and the end of the flexible board portion is longer than the end of the wooden board, and the carbon fiber sheet The portion has a length extending outside the end of the flexible board portion,
The cover panel has a wooden board portion laminated on the back surface of the wooden portion,
At the end of the cover panel, the end of the wooden part protrudes from the end of the wooden board part, and the overhang length is equal to the end of the wooden part of the end of the wooden board part of the reinforcing panel. A reinforcing structure for a concrete structure, characterized in that it corresponds to an overhang length from the A plurality of bending panels made up of the reinforcing panels, and a flat plate-like cover panel attached to the connecting portion between the bending panels,
The bending panel has a bending portion covering a corner of the concrete structure,
3. The reinforcing structure of a concrete structure according to claim 2, wherein a pair of said bending panels exhibiting a U-shaped cross section are provided so as to sandwich said concrete structure having a rectangular cross section from both sides. A reinforcing structure for a concrete structure that reinforces a concrete structure having a circular or elliptical cross section using the reinforcing panel for a concrete structure according to claim 1,
A plurality of curved panels made up of the reinforcing panels, and a plate-like cover panel attached to the connecting portion between the curved panels,
The curved panel has a curved portion that covers the curved portion of the concrete structure,
The carbon fiber sheet portions of the curved panels adjacent in the lateral direction are overlapped with each other so as to protrude beyond the tip of the flexible board portion,
the flexible board portions of the curved panels adjacent in the lateral direction protrude beyond the tips of the wooden board portions, and a first gap is formed between the adjacent wooden board portions;
The wooden board portions of the curved panels adjacent in the lateral direction protrude beyond the tips of the wooden portions, and a second gap is formed between the adjacent wooden portions,
The cover panel is formed by overlapping a wooden board portion inserted into the first gap and a wooden portion inserted into the second gap,
A reinforcing structure for a concrete structure, wherein the thickness dimension of the wooden board portion of the cover panel is smaller than the thickness dimension of the wooden board portion of the curved panel. 5. The reinforcing structure of a concrete structure according to claim 4, wherein the curved panels have an arcuate cross-section and are provided in a pair so as to sandwich the concrete structure having a rectangular cross-section from both sides. The wooden board portions adjacent to each other in the vertical direction are arranged with a gap therebetween,
6. The gap according to any one of claims 2 to 5, wherein a backup material is interposed in the gap to abut on a connecting portion between the vertically adjacent carbon fiber sheet portions. Reinforcement structure for concrete structures. the connecting portion between the adjacent wooden board portions and the connecting portion between the adjacent wooden portions are offset,
The reinforcing structure of a concrete structure according to any one of claims 2 to 6, wherein the adjacent wooden parts are arranged with a gap therebetween.

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