Repair method of plate and wall body

Abstract

To provide a method capable of producing plates more massively and simply as well as repairing a wall body easily and securely.SOLUTION: A method includes placing, on a plate 10, a plate-like body part 11 having a fiber reinforcement resin layer 24 including a roving layer 21 with a plurality of reinforcement fiber bundles extending in a longitudinal direction covered by hardening resin and seal parts 12, 13 provided on both sides in a width direction or both sides in a longitudinal direction of the plate-like body part 11 and connected to seal parts 12, 13 of adjacent plates 10 in a sealed state. Then a mass of a component extending in the longitudinal direction of the plate-like body part 11 of a roving 21a and a roving cloth 22 is 20% or more and 70% or less of the whole mass.SELECTED DRAWING: Figure 4

Description

Technical Field

[0001] The present invention relates to a plate material used for water channels such as those for agriculture and sewage, or for tunnel inner surfaces such as those for roads and railways, and for wall bodies such as high retaining walls, and a method for repairing wall bodies.

Background Art

[0002] Conventionally, a water channel repair method using an FRP (Fiber Reinforced Plastic) plate or an FRPM (Fiberglass Reinforced Plastic Mortar) plate has been known (see, for example, Patent Document 1). This FRPM plate is mainly manufactured by press molding. For example, a plurality of fiber sheets impregnated with an unsaturated polyester resin or the like and a core material are laminated and pressed to form an FRPM plate of a certain size, and then cut into the size required as a plate material.

[0003] On the other hand, as a fiber-reinforced resin molded product, a long fiber-reinforced resin molded product including a hollow rib extending in the longitudinal direction and a plate-shaped top plate is known (see, for example, Patent Document 2). This fiber-reinforced resin molded product can maintain its strength without providing a metal core material by using glass roving as a reinforcing fiber.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0005] However, in the manufacturing method of a conventional FRPM plate as in Patent Document 1, there is a limit to manufacturing plate materials in larger quantities and more simply.

[0006] The present invention has been made in view of such a point, and its object is to enable the production of plate materials in larger quantities and more easily, and to enable easy repair of wall bodies such as inner surfaces of water channels or tunnels and guardrail walls.

Means for Solving the Problems

[0007] In order to achieve the above object, in this invention, the main layer of the plate-like body is composed of a roving layer containing a fiber layer extending in the axial direction at an appropriate ratio.

[0008] Specifically, in the first invention, a plate-like main body portion having a fiber-reinforced resin layer including a roving layer in which a plurality of reinforcing fiber bundles extending in the longitudinal direction are covered with a curable resin, and a seal portion provided on both sides in the width direction or both sides in the longitudinal direction of the plate-like main body portion and hermetically connected to the seal portions of adjacent plate materials. The mass of the reinforcing fiber bundles extending in the longitudinal direction is set to be 20% or more and 70% or less of the total mass.

[0009] According to the above configuration, since the mass of the reinforcing fiber bundles extending in the longitudinal direction, in which a plurality of reinforcing fiber bundles extending in the longitudinal direction are covered with a curable resin, is 20% or more of the total mass of the plate material, the rigidity as a plate material can be ensured. If the mass of the reinforcing fiber bundles extending in the longitudinal direction is less than 20% of the total mass of the plate material, sufficient rigidity cannot be ensured, and if it is more than 70%, the ratio of the reinforcing fiber bundles becomes high and the ratio of the curable resin decreases too much, resulting in rather low rigidity. Also, since it can be hermetically connected to adjacent plate materials at the seal portion, cracks at the joints of the plate materials are less likely to occur, and the durability is significantly improved.

[0010] In the second invention, in the first invention, the longitudinal direction of the seal portion substantially coincides with the longitudinal direction of the roving layer.

[0011] According to the above configuration, the tensile strength, surface pressure strength, etc. of the seal part in the longitudinal direction are improved, cracks at the joints of the plate material are less likely to occur, and the durability is significantly improved. The meaning of "substantially coincident" is that an inclination (deviation) of about ±10° is allowed.

[0012] In the third invention, in the first or second invention, the seal part has an inclined surface that becomes narrower toward the tip of the seal part.

[0013] According to the above configuration, the drawing during the drawing forming of the plate material becomes easy, and the operation of overlapping the seal parts of adjacent plate materials becomes easier compared to the case without the inclined surface.

[0014] In the fourth invention, in any one of the first to third inventions, In the cross-section cut in the width direction, the seal parts are formed in an alternating shape so as to be point-symmetrical with respect to the center of the plate-like main body part.

[0015] According to the above configuration, when overlapping the seal parts of adjacent plate materials, since they have an alternating shape, the joint part does not protrude in the plate thickness direction, looks good, and the workability is good.

[0016] In the fifth invention, in any one of the first to fourth inventions, It is configured to include a core material layer.

[0017] According to the above configuration, the compressive strength per unit mass can be made higher than that of cement concrete, so the plate thickness can also be made thinner, it is lightweight and easy to transport.

[0018] In the sixth invention, in the fifth invention, In the cross-section cut in the width direction, the outer periphery of the core material layer is surrounded by a fiber-reinforced resin layer including the roving layer.

[0019] According to the above configuration, by surrounding the outer periphery of the core material layer with high compressive strength with a roving layer with high tensile rigidity, the rigidity is further increased and the durability is significantly improved.

[0020] In the seventh invention, in any one of the first to sixth inventions, A plurality of ridges extending in substantially the same direction as the fiber direction of the roving layer are formed on the back surface side of the plate-shaped main body portion.

[0021] According to the above configuration, the tensile strength and the like in the fiber direction of the roving layer are further increased, and it becomes easier to install by pressing against the bent portions of the water channels and the tunnel wall bodies. Also, when grout is placed on the back surface side of the plate-shaped main body portion, an anchor effect due to the ridges can be obtained after curing, so the number of anchors can be reduced. The meaning of "extending in substantially the same direction" means that a tilt (deviation) of about ±10° is allowed.

[0022] In the eighth invention, A plate-shaped main body portion having a fiber-reinforced resin layer including a roving layer in which a plurality of longitudinally extending reinforcing fiber bundles are covered with a curable resin, Sealing portions provided on both sides in the width direction or both sides in the longitudinal direction of the plate-shaped main body portion and hermetically connected to the sealing portions of adjacent plate materials, In a cross section cut in the width direction, the roving layer is formed at the central portion of the plate thickness of the plate-shaped main body portion.

[0023] According to the above configuration, since the roving layer is provided at the central portion of the plate thickness of the plate-shaped main body portion, a thin plate material without a core material layer such as resin mortar, which has improved tensile strength and the like and high overall strength, is obtained, and it is lightweight, has high strength, and is easy to transport and construct.

[0024] In the ninth invention, A plate-shaped main body portion having a fiber-reinforced resin layer including a core material layer and a roving layer in which a plurality of longitudinally extending reinforcing fiber bundles are covered with a curable resin, Sealing portions provided on both sides in the width direction or both sides in the longitudinal direction of the plate-shaped main body portion and hermetically connected to the sealing portions of adjacent plate materials, In a cross section cut in the width direction, the roving layer is provided at a portion in contact with the core material layer.

[0025] According to the above configuration, by having a core material layer, while ensuring an appropriate thickness, by providing a roving layer at a portion in contact with this core material layer, a plate material with further improved rigidity, lightweight, high strength, and easy to transport and construct can be obtained.

[0026] In the tenth invention, A plate-shaped main body portion having a fiber-reinforced resin layer including a core material layer and a roving layer in which a plurality of reinforcing fiber bundles extending in the longitudinal direction are covered with a curable resin, and provided on both sides in the width direction or both sides in the longitudinal direction of the plate-shaped main body portion, and a seal portion that is hermetically connected to the seal portion of an adjacent plate material, is cut out at a predetermined length in the longitudinal direction of the roving layer, The seal portions of the adjacent plate materials are overlapped and attached to the wall body.

[0027] According to the above configuration, since a lightweight and highly rigid plate material having a fiber-reinforced resin layer including a roving layer in which a plurality of reinforcing fiber bundles extending in the longitudinal direction are covered with a curable resin is used to repair wall bodies such as water channels, tunnel inner surfaces, and guardrail walls, transportation and repair work become extremely easy. In addition, since the adjacent plate materials can be hermetically connected at the seal portion, cracks at the joints of the plate materials are less likely to occur, and the durability is significantly improved.

[0028] In the eleventh invention, in the tenth invention, The seal portion of the plate material is configured to be adhered to the seal portion of another plate material adjacent in the width direction.

[0029] According to the above configuration, the plate materials can be easily and surely joined only by adhering the seal portions of the adjacent plate materials.

[0030] In the twelfth invention, in the tenth or eleventh invention, In a cross section cut in the width direction, the seal portion is formed to be point-symmetrical with respect to the center of the plate-shaped main body portion, The surface on the other side of the seal portion, which is continuous with the surface on one side of the plate-shaped main body portion, is configured to be overlapped with the surface on the one side of the seal portion that is continuous with the surface on the other side of the adjacent plate materials.

[0031] According to the above configuration, when overlapping the seal portions of adjacent plate materials, since they have an alternating shape, the joint portion does not protrude in the plate thickness direction, resulting in a good appearance and good workability.

[0032] In the 13th invention, A plate material having a plate-shaped main body portion and a seal portion, which includes a roving layer in which a plurality of reinforcing fiber bundles extending in the longitudinal direction are covered with a curable resin, is cut out by cutting in the width direction of the roving layer in response to the bending of the wall body. The plate materials are configured to be attached adjacent to each other in accordance with the wall body.

[0033] According to the above configuration, since it can be cut along the width direction at an arbitrary length in the longitudinal direction (drawing-out direction), by cutting out the plate material in the width direction of the roving layer in accordance with the bent portion of the wall body such as a water channel, the pasting operation with the plate material moderately curved becomes easy.

Effect of the Invention

[0034] As described above, according to the present invention, plate materials can be manufactured in larger quantities and more easily, and the wall body can be easily repaired.

Brief Description of the Drawings

[0035]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

Figure 13

Figure 14

Mode for Carrying Out the Invention

[0036] Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[0037] (Embodiment 1) As shown in FIG. 1, the plate material 10 according to the embodiment of the present invention is, for example, attached to the inner surfaces of the side wall 2 and the bottom wall 3 in the water channel 1 as a wall body, and is used, for example, to repair the damaged water channel 1 due to aging deterioration or the like. Although it is called a plate material, it goes without saying that when a new water channel 1 or tunnel is provided, the plate material 10 may be attached to the inner surface thereof. For example, when smoothing the surface such as a flume to ensure the flow velocity and attaching it in advance, the plate material 10 itself may be used as a formwork, and after pouring concrete, it may be used as a flow path wall as it is. Further, it may be attached to the inner or outer surface of a guardrail wall as a wall body.

[0038] As shown in FIGS. 2 to 4, the plate material 10 includes a plate-shaped main body portion 11 having a fiber-reinforced resin layer 24 including a roving layer 21 in which a plurality of reinforcing fiber bundles (rovings 21a) extending in the longitudinal direction are covered with a curable resin. Specifically, as shown enlarged in FIG. 4, a roving layer 21 is formed by impregnating a roving 21a in which dozens of strands of reinforcing fibers such as glass fibers are bundled to the thickness of cotton thread with a curable resin. Specific examples of the curable resin are not particularly limited, but include, for example, thermosetting resins such as unsaturated polyester resins, epoxy resins, vinyl ester resins, and phenolic resins. In the present embodiment, a flame retardant or non-combustible material such as aluminum hydroxide may be added to this curable resin.

[0039] And in the cross section obtained by cutting the plate material 10 in the width direction, the outer periphery of the core material layer 20 is surrounded by a fiber-reinforced resin layer 24 including the roving layer 21. In the present embodiment, the core material layer 20 is about 3 mm, for example, and the thickness of the entire plate-shaped main body portion 11 is about 8 mm.

[0040] In this embodiment, the core material layer 20 is composed of a resin mortar layer. Since the resin mortar layer is made of, for example, a sand-like material, it is wrapped with a roving cloth 22 with small knitted gaps. The roving cloth 22 is a material obtained by knitting roving in a cross shape vertically and horizontally, and the vertical and horizontal ratios are 50:50. Further, in order to increase the strength in the lateral direction (a direction perpendicular to the axial direction), a bamboo blind (not shown) in which a lateral fiber bundle is bound with a connecting thread may be inserted between the roving cloth 22 and the roving layer 21. Note that the roving layer 21 may be provided at a portion directly in contact with the core material layer 20, or may be provided at a portion in contact with the core material layer 20 via the roving cloth 22 or the like as described above. Note that the core material layer 20 does not necessarily have to be formed of resin mortar, and may be formed of a foaming material (PVC, polyethylene, styrene, urethane, polypropylene, etc.), a recycled material (slag, FRP waste material, etc.), or the like.

[0041] Sealing portions 12 and 13 that are hermetically connected to the sealing portions 12 and 13 of the adjacent plate materials 10 are formed on both sides in the width direction of the plate-like main body portion 11. As shown in FIGS. 3 and 4, in a cross section cut in the width direction, the sealing portions 12 and 13 are formed in an alternating shape so as to be point-symmetrical with respect to the center of the plate-like main body portion 11. In this embodiment, the core material layer 20 is not formed in these sealing portions 12 and 13. Note that sealing portions may be formed on both sides in the longitudinal direction of the plate material 10.

[0042] Further, the sealing portions 12 and 13 have inclined surfaces 12a and 13a that become thinner toward the tips of the sealing portions 12 and 13. These inclined surfaces 12a and 13a may be gentle inclined surfaces. For example, in the illustrated cross section, when the thickness of the plate-like main body portion 11 is 8 mm, the length from the base to the tip of the sealing portions 12 and 13 is 50 mm, the thickness at the tip is 3 mm with respect to the thickness of 4 mm at the base, and the inclination angle is about 1.1°. Thereby, the drawing during the drawing forming of the plate material 10 becomes easy, and also, during the operation of overlapping the sealing portions 12 and 13 of the adjacent plate materials 10 described later, the operation becomes extremely easy.

[0043] Also, the outermost layer may be covered with a glass mat 23. This improves durability. The glass mat 23 is made of, for example, CSM (Continuous Strand Mat), CM (Chopped Strand Mat), or SM (Surface Mat), and the direction of the glass fibers may be random.

[0044] In this embodiment, the longitudinal direction of the seal portions 12 and 13 substantially coincides with the axial direction (longitudinal direction) of the roving 21a. However, in cases where the thickness of the seal portions 12 and 13 is not changed, etc., the width direction of the seal portions 12 and 13 may substantially coincide with the axial direction (longitudinal direction) of the roving 21a. The meaning of "substantially coincides" is that an inclination (deviation) of about ±10° is allowed.

[0045] The mass of the roving 21a shall be 20% or more and 70% or less of the total mass. In this embodiment, for example, the mass of the component extending in the longitudinal direction of the plate-like main body portion 11 of the roving 21a and the roving cloth 22 (the mass of the reinforcing fiber not including the curable resin in the roving layer 21) is 28%, but it is not limited thereto.

[0046] Although detailed description is omitted, the plate material 10 may be formed by a drawing forming method such as that of Patent Document 2.

[0047] Thus, in this embodiment, since the mass of the component extending in the longitudinal direction of the plate-like main body portion 11 of the roving 21a and the roving cloth 22 in the roving layer 21 in which a plurality of reinforcing fiber bundles extending in the longitudinal direction are covered with a curable resin is 20% or more of the total mass of the plate material 10, the rigidity as the plate material 10 can be ensured. If the above mass is less than 20% of the total mass of the plate material 10, sufficient rigidity cannot be ensured, and if it is more than 70%, the ratio of the reinforcing fiber bundles becomes too high and rather the rigidity becomes low. Also, since the adjacent plate materials 10 can be hermetically connected at the seal portions 12 and 13, cracks at the joints of the plate materials 10 are less likely to occur, and the durability is significantly improved.

[0048] Moreover, by having the core material layer 20 made of a resin mortar layer or the like, while ensuring an appropriate thickness, by providing the roving layer 21 at the portion in contact with the core material layer 20, a plate material 10 with further improved rigidity, being lightweight, having high strength, and being easy to transport and construct can be obtained.

[0049] Also, since the longitudinal directions of the seal portions 12, 13 substantially coincide with the longitudinal direction of the roving layer 21, the tensile strength, surface pressure strength, etc. with respect to the longitudinal direction of the seal portions 12, 13 are improved, cracks at the joints of the plate material 10 are less likely to occur, and the durability is significantly improved.

[0050] In addition, since the resin mortar layer can have a higher compressive strength per unit mass than cement concrete, the plate thickness can also be made thinner, and it is lightweight and easy to transport.

[0051] Also, by surrounding the outer periphery of the core material layer 20 with high compressive strength with the roving layer 21 with high tensile rigidity, the rigidity becomes even higher and the durability is significantly improved.

[0052] Therefore, according to the plate material 10 according to the present embodiment, since a plate material 10 with high rigidity can be obtained by the drawing forming method, the plate material 10 for the water channel can be manufactured in a larger quantity and more easily.

[0053] -Method for repairing a water channel- Next, the method for repairing a water channel according to the present embodiment will be described.

[0054] As shown in FIGS. 1, 4, and 5, the plate material 10 of the above-described Embodiment 1 is cut out along the width direction of the plate material 10 at a predetermined length in the longitudinal direction of the roving layer 21. That is, it is cut out in accordance with the depth of the side wall 2 and the width of the bottom wall 3 of the water channel 1.

[0055] Next, a waterstop rubber (sealing rubber 14) is attached to the surface side of one of the seal portions 12 by means of a double-sided tape, an adhesive, or the like. As the adhesive, for example, an epoxy-based adhesive is used. Of course, the sealing rubber 14 may be attached to the back side of the other seal portion 13. As shown in FIGS. 1 to 3, through holes 15 for the anchors 5 are formed at appropriate positions on the plate material 10.

[0056] Also, a plate-shaped cushioning material 4 made of a foamed molded body or the like is cut out according to the size of the plate material 10. The cushioning material 4 is made of, for example, a foamed rubber such as foamed ethylene-propylene rubber or foamed polybutadiene rubber, or a foamed plastic-based material such as foamed polystyrene, foamed polyethylene, foamed polypropylene, or foamed urethane, but other materials having elastic characteristics equivalent to these may also be used.

[0057] As shown in FIGS. 1, 5, and 6, the inner surfaces of the side wall 2 and the bottom wall 3 of the water channel 1 are covered with the cushioning material 4. Then, the plate material 10 cut appropriately is bonded to the surface thereof.

[0058] At this time, as shown in FIG. 5, the seal portions 12 and 13 of the adjacent plate materials 10 are overlapped and attached so as to sandwich the sealing rubber 14. Then, the seal portions 12 and 13 are adhered to the seal portions 12 and 13 of the other plate materials 10 adjacent in the width direction by an adhesive or the like.

[0059] In this embodiment, when the seal portions 12 and 13 of the adjacent plate materials 10 are overlapped, they have an alternating shape, so that the joint portion does not protrude in the plate thickness direction, the appearance is good, and the workability is good.

[0060] Also, it is preferable to previously make pilot holes 2a for the anchors in the side wall 2 and the bottom wall 3 with an electric drill or the like in accordance with the through holes 15.

[0061] Furthermore, as shown in FIGS. 6(a) and 6(b), when the dimensional accuracy of the cross-section of the water channel 1 is good, for example, a lower-end side reeling rubber 16 is attached to the lower end of the plate material 10. Thereby, the sealing property of the corner portion between the side wall 2 and the bottom wall 3 is improved. As shown in FIG. 6(b), even if the side wall 2' of the water channel 1 is inclined with respect to the bottom wall 3, if the lower-end side reeling rubber 16 is attached to the lower end of the plate material 10, gaps are less likely to occur and the durability of the water channel 1 is improved.

[0062] Then, as shown in the lower part of FIG. 5, the anchor 5 is passed through the through-hole 15 to penetrate the buffer material 4, and the tip 5a of the anchor 5 is expanded in diameter at the lower hole 2a. Thereby, the inner surfaces of the side walls 2 and 3 of the water channel 1 are covered without gaps by the plate material 10. Note that the upper end of the plate material 10 may be sealed with a sealing material 17 together with the buffer material 4 as shown in FIG. 6(a).

[0063] Therefore, according to the method for repairing a water channel according to the present embodiment, the wall body such as the water channel 1 or the inner surface of the tunnel can be easily repaired by the plate material 10.

[0064] - Modification Example 1 - FIGS. 7 and 8 show a modification of the method for repairing the water channel 101 covering the corner portion according to Modification Example 1 of Embodiment 1 of the present invention, and is different from the above embodiment in that a gusset plate 116 is provided at the corner portion of the water channel 101. In the following modification examples and Embodiment 2, the same parts as those in FIGS. 1 to 6 are denoted by the same reference numerals and the detailed description thereof is omitted.

[0065] The plate material 110 in this modification example is equivalent to the plate material 10 in Embodiment 1 above. However, in this modification example, since the dimensional accuracy of the water channel cross-section is low, a gap is likely to occur between the lower end of the plate material 110 of the side wall 102 and the end portion in the width direction of the water channel of the plate material 110 of the bottom wall 103. For this reason, as shown in FIG. 8(a), assuming that a gap is generated to some extent, a gap may be provided intentionally, and the gap generated at the corner portion may be covered with the gusset plate 116 and fixed to the side wall 102 and the bottom wall 103 with the anchor 5.

[0066] On the other hand, in the plate material 210 shown in FIG. 8(b), when the side wall 202 and the bottom wall 203 of the water channel 1 are inclined, a hunch plate 216 curved in a circular arc cross section may be used to close the gap between the lower end of the plate material 210 of the side wall 202 and the widthwise end of the plate material 210 of the bottom wall 203 in the water channel 1.

[0067] Furthermore, in the plate material 310 shown in FIG. 8(c), when there is a hunch 305 (protrusion) at the corner of the side wall 302 and the bottom wall 303 of the water channel 1, the shape of the hunch plate 316 may be the same as that in FIG. 8(a), but it is preferable to provide an anchor 5 also at the hunch 305 portion.

[0068] (Embodiment 2) FIG. 9 shows Embodiment 2 of the present invention, which is different from Embodiment 1 in that it does not have a core material layer 20. Specifically, for example, as shown in FIG. 9(a), the plate material 410 of the present embodiment has a plate-shaped main body portion 411 including a roving layer 21 in which a roving 21a composed of a plurality of reinforcing fiber bundles extending in the longitudinal direction is covered with a curable resin.

[0069] On both sides in the width direction or both sides in the longitudinal direction of the plate-shaped main body portion 11, seal portions 412, 413 are provided which are hermetically connected to the seal portions 412, 413 of the adjacent plate materials 410. These seal portions 412, 413 may be thinner than the thickness of the plate-shaped main body portion 411 as in Embodiment 1, but in the present embodiment, they are configured to have the same thickness as the plate-shaped main body portion 411.

[0070] In the present embodiment, the roving layer 21 is formed at the central portion of the plate thickness of the plate-shaped main body portion 11. Similar to Embodiment 1, the periphery of the roving layer 21 is covered with a roving cloth 22, and its outer periphery is further covered with a glass mat 23. And the mass of the components of the roving 21a and the roving cloth 22 extending in the longitudinal direction of the plate-shaped main body portion 11 is set to be 20% or more and 70% or less of the total mass. In the present embodiment, for example, this mass (the mass of the reinforcing fibers excluding the curable resin in the roving layer 21 and the mass of the components of the roving cloth 22 extending in the longitudinal direction of the plate-shaped main body portion 11) is 65%, but it is not limited thereto.

[0071] As shown in Fig. 9(a), the thickness of the plate material 410 of the present embodiment is, for example, 8 mm, and chamfered inclined surfaces 412a and 413a are formed in the seal portions 412 and 413. The angles of the inclined surfaces 412a and 413a are not particularly limited.

[0072] The thickness of the plate material 410 is not limited to 8 mm. For example, as in the case of the plate material 410' shown in Fig. 9(b), it can be 5 mm, or as in the case of the plate material 410'' shown in Fig. 9(c), it can be 4 mm, and thinning is also possible. Note that the shapes of the inclined surfaces 412a and 413a are not limited to this. For example, a rounded chamfer may be provided, or it may be in an arc shape in cross section.

[0073] In any case, after butting the seal portions 412 and 413 against each other with a slight gap therebetween, if, for example, a site-curing type sealing material is poured into the concave grooves formed by this gap and the inclined surfaces 412a and 413a for joint treatment, it is easy to maintain the sealing performance of the butting portion.

[0074] In the present embodiment, since the roving layer 21 is provided at the central portion of the plate thickness of the plate-shaped main body portion 11, thin plate materials 410, 410', and 410'' that do not include the core material layer 20 of resin mortar and have improved tensile strength and the like and high overall strength can be obtained. These plate materials 410, 410', and 410'' are lightweight, have high strength, and are easy to transport and construct.

[0075] Thus, the FRP plate without a core material layer has a plate thickness of 4 to 8 mm, is more easily bent than the plate material 10 having the core material layer 20 as in the first embodiment, and has the advantage that the plate material 410 of the present embodiment is more easily conformed to a curved surface when conforming to a curved surface.

[0076] -Method for repairing a water channel- Next, the method for repairing a water channel according to the present embodiment will be described.

[0077] Although not shown in detail, similarly to the first embodiment, the plate material 410 of this embodiment is cut along the width direction at an appropriate length in the extending direction of the roving 21a in accordance with the inner surface shape of the water channel 1.

[0078] Next, the cushioning material 4 is cut out according to the size of this plate material 410.

[0079] Next, the inner surfaces of the side wall 2 and the bottom wall 3 of the water channel 1 are covered with the cushioning material 4. Then, the appropriately cut plate material 10 is bonded to the surface.

[0080] At this time, the plate material 410 is fixed with the anchor 5 while maintaining an appropriate gap between the seal portions 412 and 413 of the adjacent plate materials 410, and the sealing material is filled in the gap.

[0081] The plate material 410 of the so-called FRP plate without the core material layer 20 as in this embodiment is more easily bent than the plate material 10 having the core material layer 20 and is more easily conformable when conforming to a curved surface.

[0082] -Modification Example 1- In the first embodiment, the thickness of the seal portions 12 and 13 is reduced, and the portion where the seal portions 12 and 13 are overlapped has the same thickness as the plate-like main body portion 11. However, in the plate material 510 of Modification Example 1 of the second embodiment, for example, as shown in FIGS. 10 and 11, only the seal portion 512 on one end side of the plate material 510, the seal portion 512 having the same thickness as the plate-like main body portion 511, is bent so as to bulge forward by the thickness of the plate-like main body portion 511, and the seal portion 513 on the other end side may be a flat one obtained by extending the plate-like main body portion 511.

[0083] The sealing rubber 14 may be attached to the back surface side of the seal portion 512 in the same manner as in the first embodiment.

[0084] In this way, the joint portion bulges, but the front and back surfaces are sealed with the sealing rubber 14, and since the seal portion 512 on the front side covers the front side of the joint portion, there is an advantage that the construction of the joint material is very easy.

[0085] -Modification Example 2- As shown in FIGS. 12 and 13, in the plate material 610 of Modification Example 2 of Embodiment 2, a plurality of ridges 616 extending in substantially the same direction as the fiber direction of the roving layer 21 are formed on the back surface side of the plate-like main body portion 611.

[0086] Specifically, as shown in FIG. 12(a), when the roving 21a is drawn and formed, the ridges 616 may be formed at a predetermined interval, with a predetermined thickness and height, in accordance with the drawing direction.

[0087] Then, as shown in FIG. 12(b), the plate material 610 can be smoothly curved in accordance with the curvature of the inner surface of the side wall 2 of the water channel 1. As in this modification example, the FRP plate without a core material layer is 6 to 8 mm thick, is easily bent, and is easy to conform to a curved surface as shown in FIG. 13.

[0088] In this modification example, not only is the tensile strength in the fiber direction of the roving layer 21 increased, but it also becomes easier to install by pressing against the water channel 1 or the bent portion of a tunnel (not shown).

[0089] Also, as shown in FIG. 14, when grout 604 is placed on the back surface side of the plate-like main body portion 611, an anchor effect due to the ridges 616 can be obtained after hardening, so the number of anchors 5 can be reduced.

[0090] (Other Embodiments) The present invention may be configured as follows with respect to the above embodiments.

[0091] That is, in the above embodiments, the embodiment of attaching a plate material to the side wall or bottom wall of the water channel 1 has been described, but it can be similarly used for repairing the inner surface in a tunnel.

[0092] Note that the above embodiments are essentially preferred examples and are not intended to limit the scope of the present invention, its applications, or uses.

Description of Reference Numerals

[0093] 1 Water channel 2,2’ side wall 2a hole 3 bottom wall 4 buffer material 5 anchor 5a tip 10 plate material 11 plate-shaped main body part 12 seal part 12a,13a inclined surface 13 seal part 14 sealing rubber 15 through hole 16 end-side reeling rubber 17 sealing material 20 core material layer 21 roving layer 21a roving 22 roving cloth 23 glass mat 101 water channel 102 side wall 103 bottom wall 110 plate material 116 hunch board 202 side wall 203 bottom wall 216 hunch board 302 side wall 303 bottom wall 305 hunch 316 hunch board 410,410’,410'’ plate material 411 plate-shaped main body part 412,413 seal part 412a,413a inclined surface 510 plate material 511 plate-shaped main body part 512 seal part 513 seal part 604 grout 610 plate material 611 plate-shaped main body part 616 ridge

Claims

1. A plate-shaped main body having a fiber-reinforced resin layer including a roving layer in which a plurality of longitudinally extending reinforcing fiber bundles are covered with a curable resin, and a seal portion provided on both sides in the width direction or both sides in the longitudinal direction of the plate-shaped main body and hermetically connected to the seal portions of adjacent plate materials. The mass of the longitudinally extending reinforcing fiber bundles is 20% or more and 70% or less of the total mass. A plate material characterized by this.

2. The longitudinal direction of the seal portion substantially coincides with the longitudinal direction of the roving layer. The plate material according to claim 1, characterized by this.

3. The seal portion has an inclined surface that becomes narrower toward the tip of the seal portion. The plate material according to claim 1 or 2, characterized by this.

4. In a cross section cut in the width direction, the seal portions are formed in an alternating shape so as to be point-symmetrical with respect to the center of the plate-shaped main body. The plate material according to claim 1 or 2, characterized by this.

5. Including a core material layer. The plate material according to claim 1 or 2, characterized by this.

6. In a cross section cut in the width direction, the outer periphery of the core material layer is surrounded by a fiber-reinforced resin layer including the roving layer. The plate material according to claim 5, characterized by this.

7. A plurality of ridges extending in substantially the same direction as the fiber direction of the roving layer are formed on the back surface side of the plate-shaped main body. The plate material according to claim 1 or 2, characterized by this.

8. A plate-shaped main body having a fiber-reinforced resin layer including a roving layer in which a plurality of longitudinally extending reinforcing fiber bundles are covered with a curable resin, and a seal portion provided on both sides in the width direction or both sides in the longitudinal direction of the plate-shaped main body and hermetically connected to the seal portions of adjacent plate materials. In a cross section cut in the width direction, the roving layer is formed at the central portion of the plate thickness of the plate-shaped main body. A plate material characterized by this.

9. A plate-shaped main body having a fiber-reinforced resin layer including a core material layer and a roving layer in which a plurality of longitudinally extending reinforcing fiber bundles are covered with a curable resin, and a seal portion provided on both sides in the width direction or both sides in the longitudinal direction of the plate-shaped main body and hermetically connected to the seal portions of adjacent plate materials. In a cross section cut in the width direction, the roving layer is provided at a portion in contact with the core material layer. A plate material characterized by this.

10. A plate-like main body having a fiber-reinforced resin layer including a core material layer and a roving layer in which a plurality of longitudinally extending reinforcing fiber bundles are covered with a curable resin, and a seal portion provided on both sides in the width direction or both sides in the longitudinal direction of the plate-like main body and hermetically connected to the seal portions of adjacent plate materials, the plate material being cut out at a predetermined length in the longitudinal direction of the roving layer, superposing the seal portions of the adjacent plate materials and attaching them to the wall A method for repairing a wall, characterized in that.

11. adhering the seal portion of the plate material to the seal portion of another plate material adjacent in the width direction The method for repairing a wall according to claim 10, characterized in that.

12. In the cross section cut in the width direction, the seal portion is formed to be point-symmetrical with respect to the center of the plate-like main body, superposing the surface on the other side of the seal portion, which is continuous with the surface on one side of the plate-like main body, with the surface on one side of the seal portion, which is continuous with the surface on the other side of the adjacent plate material The method for repairing a wall according to claim 10 or 11, characterized in that.

13. A plate material provided with a plate-like main body and a seal portion having a fiber-reinforced resin layer including a roving layer in which a plurality of longitudinally extending reinforcing fiber bundles are covered with a curable resin is cut out by cutting in the width direction of the roving layer in correspondence with the bending of the wall, attaching the plate materials adjacent to each other in accordance with the wall A method for repairing a wall, characterized in that.

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