JP2013245432A - Reinforcement method of component - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an intended cut surface by cutting a carbon fiber sheet to form a fiber-reinforced resin film on a job site.SOLUTION: A sheet cutting step of cutting a carbon fiber sheet 15 to form an intended size or shape, a resin coating step of applying a resin 11 to the surface of a concrete skeleton 1, and a fiber sheet arranging step of arranging the cut carbon fiber sheet 15 on the surface of the concrete skeleton 1 coated with the resin 11 are performed. In the sheet cutting step, an adhesive tape is attached to the surface of the carbon fiber sheet along a position to be cut, and the carbon fiber sheet is cut together with the adhesive tape at the position to be cut. The adhesion between the supporting material 32 of an adhesive tape 30a and an adhesive material 31 is lower than the adhesion between the adhesive material 31 and carbon fiber 17 and the resin 11 of the carbon fiber sheet 15.

Description

  The present invention relates to a method for reinforcing a member that covers a surface of a member to be reinforced with a carbon fiber reinforced resin film.

  In order to improve the seismic resistance of the concrete frame, for example, as described in Patent Document 1 below, the concrete frame is covered with a carbon fiber reinforced resin film (hereinafter referred to as CFRP (Carbon Fiber Reinforced Plastics) film). This concrete frame may be reinforced.

  When a CFRP film is formed on the surface of a concrete frame, generally, it is first cut into a target size or a target shape. Next, a resin is applied to the surface of the concrete frame. And the carbon fiber sheet | seat after a cutting | disconnection is arrange | positioned on the surface of the concrete housing in which resin is apply | coated. A carbon fiber sheet is arranged, and the resin is impregnated in the carbon fiber sheet. When the resin is completely cured, the reinforcing structure is completed.

JP 2012-62746 A

  A carbon fiber manufacturer generally forms a carbon fiber sheet and then cuts the carbon fiber sheet to a specified size with a large cutting machine. On the other hand, as described in Patent Document 1, when reinforcing a concrete casing, it is necessary to cut the carbon fiber sheet into a target size or a target shape at a site where the target concrete casing exists. At this time, it is conceivable to use a cutting tool such as a scissors or a cutter. However, when the carbon fiber sheet is simply cut with a cutting tool such as a scissors or a cutter, the plurality of yarns constituting the carbon fiber sheet move relative to each other, and the yarn that is a bundle of carbon fibers frays. The cut surface becomes extremely irregular. That is, if the carbon fiber sheet is simply cut with a cutting tool such as a scissors or a cutter, the target cut surface cannot be obtained.

  Therefore, an object of the present invention is to provide a method for reinforcing a member capable of obtaining a target cut surface by cutting a carbon fiber sheet by on-site work.

The method for reinforcing a member according to the invention for achieving the above object is as follows:
In a method for reinforcing a member that covers a surface of a member to be reinforced with a fiber reinforced resin film, a sheet cutting step of cutting a carbon fiber sheet that is a constituent element of the fiber reinforced resin film to form a target size or a target shape A resin application step of applying a resin, which is a constituent element of the fiber reinforced resin film, to the surface of the reinforced member, and the carbon fiber sheet after cutting on the surface of the reinforced member to which the resin is applied And a fiber sheet arranging step to arrange,
In the sheet cutting step, an adhesive tape is attached along the planned cutting position on the surface of the carbon fiber sheet, and the planned cutting position of the carbon fiber sheet is cut together with the adhesive tape,
The support material of the pressure-sensitive adhesive tape that supports the pressure-sensitive adhesive material of the pressure-sensitive adhesive tape is a pressure-sensitive adhesive property between the pressure-sensitive adhesive material and the carbon fiber that forms the carbon fiber sheet and the resin. It is characterized by being lower.

  If the carbon fiber sheet is cut with a normal cutting tool such as a cutter or scissors without using a special cutting machine, the positions of the carbon fiber warp, the position of the carbon fiber weft, the position of the warp and weft Will shift. Furthermore, since the carbon fiber sheet is formed of yarns bundled with carbon fibers, the yarns bundled with carbon fibers are frayed during cutting. That is, when a carbon fiber sheet is simply cut with a normal cutting tool such as a cutter or a scissors without using a special cutting machine, the cut surface of the carbon fiber sheet becomes extremely irregular. Therefore, in this reinforcing method, in this embodiment, the adhesive tape is attached along the cut portion, and the carbon fiber yarn in the cut portion is held with the adhesive tape, so that the carbon fiber yarn in the cut portion and the vicinity thereof. Mutual relative movement and fraying of the yarn are suppressed.

  Here, after the fiber sheet arranging step, when the resin is cured to some extent, the carbon fiber yarn forming the carbon fiber sheet is held to some extent by the resin. Moreover, the pressure-sensitive adhesive tape used in the reinforcing method has a support material that is more sticky between the pressure-sensitive adhesive material and the carbon fiber and resin forming the carbon fiber sheet than the pressure-sensitive adhesive material. Low. For this reason, in the reinforcing method, when the adhesive tape remaining on the cut carbon fiber sheet is removed by the intention of the installer, after the fiber sheet arranging step, when the resin is cured to some extent, Even if the support material is removed, the relative movement of the carbon fiber yarns in the cut portion of the carbon fiber sheet and the vicinity thereof and fraying of the yarn can be suppressed.

  Here, in the method for reinforcing the member, the support material of the adhesive tape may be a support material in which oil is impregnated in a base material. Further, the base material of the support material may be paper.

  Moreover, in the reinforcing method of the member, it is preferable that the adhesive material of the adhesive tape has lower adhesiveness to the resin than adhesiveness to the carbon fiber.

  In the reinforcing method, if the resin is cured to some extent, the adhesive material of the adhesive tape can be removed from the carbon fiber while maintaining the state in which the carbon fiber is held by the resin.

  Further, in the reinforcing method of the member, after the fiber sheet arranging step, before the resin is completely cured, a tape removing step of removing the adhesive tape remaining on the cut carbon fiber sheet is performed. May be.

  Further, in the method for reinforcing the member, an impregnation step for promoting the impregnation of the resin into the carbon fiber sheet up to the outer surface of the carbon fiber sheet opposite to the reinforced member after the fiber sheet arranging step. May be executed.

  Moreover, in the reinforcing method of the member, in the fiber sheet arranging step, the edges of the carbon fiber sheets are butted together, and the tape removing step is executed after the fiber sheet arranging step and before the impregnation step. Also good.

  In the reinforcing method, after removing the adhesive tape remaining along the edge of the carbon fiber sheet, the impregnation process is performed, and therefore the edge of the carbon fiber sheet is associated with each other by removing the adhesive tape. The unevenness on the surface of the resin that has occurred in the portion that is present can be eliminated.

  Further, in the member reinforcing method, before the resin coating step, a masking step of attaching a masking tape to a part of the surface of the member to be reinforced is performed. In the fiber sheet arranging step, the cut end of the carbon fiber sheet An edge and an edge of the masking tape may be brought into contact with each other, and the tape removing process may be performed after the impregnation process, and a masking tape removing process for removing the masking tape may be performed.

  In the member reinforcing method, the member to be reinforced may be a concrete frame.

  Moreover, in the reinforcing method of the member, before the fiber sheet arranging step, a reinforcing plate arranging step of arranging a reinforcing plate containing carbon fibers on at least a part of the surface of the concrete frame is performed, and the fiber sheet arranging step Then, you may cover the said reinforcement board with the said carbon fiber sheet after a cutting | disconnection.

  In the reinforcing method, the concrete frame can be reinforced more firmly.

  Further, in the method for reinforcing the member, the member to be reinforced is a concrete frame, and in the sheet cutting step, a part of the carbon fiber sheet is cut to form a sheet opening, and before the resin coating step, A water absorbing material arranging step of arranging a water absorbing material on a part of the surface of the concrete casing is executed, and in the resin coating step, the resin is applied on the surface of the concrete casing and the water absorbing material, and the fiber sheet is arranged. In the step, the carbon fiber in which the sheet opening is formed so that a part of the water-absorbing material disposed on the surface of the concrete casing can face the surface of the concrete casing to which the resin is applied You may perform the resin removal process which arrange | positions a sheet | seat and removes the said resin on a part of said water absorbing material which faces from the said sheet | seat opening.

  In this reinforcing method, the concrete body is covered with a fiber reinforced resin film, and the water that has entered the concrete body can be efficiently discharged while the concrete body is reinforced.

  In this case, the portion of the surface of the water absorbing material that does not face the surface of the concrete housing is covered with an impregnation prevention sheet that prevents the resin from impregnating the water absorbing material, and after the fiber sheet arranging step Then, before the resin is completely cured, by removing the portion facing the sheet opening from the impregnation prevention sheet covering the water absorbing material, the resin removal step is executed, A part of the water absorbing material may be exposed.

  In the present invention, the carbon fiber sheet can be cut by work on site to obtain a target cut surface, and this cut surface can be maintained.

It is a flowchart which shows the procedure of the reinforcement method in 1st embodiment which concerns on this invention. It is a perspective view of the carbon fiber sheet in a first embodiment concerning the present invention. It is a perspective view of the carbon fiber sheet of the state where the adhesive tape in a first embodiment concerning the present invention was stuck. It is a perspective view of the carbon fiber sheet after cutting in a first embodiment concerning the present invention. It is these sectional drawings at the time of arrange | positioning a masking tape in the concrete frame in 1st embodiment which concerns on this invention. It is these sectional drawings at the time of apply | coating resin to the surface of the concrete frame in 1st embodiment which concerns on this invention. It is these sectional drawings at the time of arrange | positioning a carbon fiber sheet on resin in 1st embodiment which concerns on this invention. It is these sectional drawings at the time of impregnating resin in the carbon fiber sheet in 1st embodiment which concerns on this invention. It is sectional drawing of the concrete structure at the time of completion in 1st embodiment which concerns on this invention. It is these sectional drawings just before removing an adhesive tape from the carbon fiber sheet in 1st embodiment which concerns on this invention. It is a flowchart which shows the procedure of the reinforcement method in 2nd embodiment which concerns on this invention. It is these sectional drawings at the time of arrange | positioning adsorption material to the concrete frame in 2nd embodiment which concerns on this invention. It is these sectional drawings at the time of apply | coating resin to the surface of the concrete frame in 2nd embodiment which concerns on this invention. It is these sectional drawings at the time of arrange | positioning a carbon fiber sheet on resin in 1st embodiment which concerns on this invention, and impregnating resin to this carbon fiber sheet. It is sectional drawing of the concrete structure at the time of completion in 2nd embodiment which concerns on this invention. It is a flowchart which shows the procedure of the reinforcement method in 3rd embodiment which concerns on this invention. It is a perspective view of the carbon fiber sheet of the state which affixed the adhesive tape in 3rd embodiment which concerns on this invention. It is a perspective view of the carbon fiber sheet after cutting in a third embodiment concerning the present invention. It is these sectional drawings at the time of arrange | positioning resin and a carbon fiber sheet on the surface of the concrete frame in 3rd embodiment which concerns on this invention. It is sectional drawing of a concrete frame, resin, and a carbon fiber sheet at the time of removing the adhesive tape in 3rd embodiment which concerns on this invention. It is sectional drawing of the concrete structure at the time of completion in 3rd embodiment which concerns on this invention. It is a flowchart which shows the procedure of the reinforcement method in 4th embodiment which concerns on this invention. It is these sectional drawings at the time of arrange | positioning resin and a masking tape on the surface of the concrete frame in 4th embodiment which concerns on this invention. It is sectional drawing of a concrete frame, resin, and a CFRP reinforcement board at the time of arrange | positioning the CFRP reinforcement board in 4th embodiment which concerns on this invention. It is sectional drawing of a concrete frame, resin, a carbon fiber sheet, and a CFRP reinforcement board at the time of arranging the carbon fiber sheet in a fourth embodiment concerning the present invention. It is sectional drawing of the concrete structure at the time of completion in 4th embodiment which concerns on this invention.

  Hereinafter, various embodiments of a reinforcing method of a member concerning the present invention are described with reference to drawings. In addition, the to-be-reinforced member which is a reinforcement object in each following embodiment is a concrete frame. However, in the present invention, the member to be reinforced does not have to be a concrete frame.

"First embodiment"
First, a first embodiment of a method for reinforcing a member according to the present invention will be described with reference to FIGS.

  As shown in FIG. 9, the concrete casing 1 that is a member to be reinforced is reinforced by covering the surface with a fiber reinforced resin film 10 to form a concrete structure. The fiber reinforced resin film 10 includes a carbon fiber sheet 15 and a resin 11 impregnated and cured by the carbon fiber sheet 15. That is, the fiber reinforced resin film 10 of the present embodiment is a CFRP (Carbon Fiber Reinforced Plastics) film. Here, an epoxy resin is used as the resin 11. In addition, as the resin 11, other thermosetting resins such as a polyamide resin and a phenol resin may be used.

  Anchor bolts or the like for attaching other members may be attached to the concrete housing 1. In addition, piping or a power outlet may be attached to the concrete housing 1. Therefore, in this embodiment, a membrane opening 12 is formed in a part of the fiber reinforced resin film 10 in order to secure an attachment region such as an anchor bolt or a pipe in the concrete casing 1.

  Next, the concrete structure construction method described above, that is, the reinforcing method of the concrete frame 1 will be described with reference to the flowchart shown in FIG.

  First, as shown in FIG. 2, a carbon fiber sheet 15 for forming the fiber reinforced resin film 10 is prepared, and as shown in FIG. 5, a part of the carbon fiber sheet 15 is cut by the following procedure, An opening 16 (see FIGS. 9 and 4) is formed (S1).

  In cutting the carbon fiber sheet 15, first, as shown in FIG. 3, the adhesive tape 30 is attached along the position 16 a that is the surface of the carbon fiber sheet 15 and becomes the edge of the sheet opening. As shown in FIG. 10, the adhesive 31 of the adhesive tape 30 is less adhesive to the resin 11 forming the fiber reinforced resin film 10 than to the carbon fiber 17 forming the fiber reinforced resin film 10. It is. Further, the support material 32 of the adhesive tape 30 has low adhesiveness to the resin 11 forming the fiber reinforced resin film 10, and moreover, due to the adhesiveness between the adhesive material 31, the carbon fiber 17 and the resin 11, the adhesive material. 31 is made of a material having lower adhesiveness. Specifically, the pressure-sensitive adhesive tape 30 has a paper (base material) slightly impregnated with oil as a support material 32, and an acrylic pressure-sensitive adhesive material as the pressure-sensitive adhesive material 31 is applied to one surface of the support material 32. For example, a medical adhesive paper tape.

  Next, as shown in FIG. 3 and FIG. 4, using a cutting tool 35 such as a cutter, the carbon fiber sheet 15 cuts the position 16 a that becomes the edge of the sheet opening 16 together with the adhesive tape 30. A sheet opening 16 is formed.

  When the carbon fiber sheet 15 is cut with a normal cutting tool 35 such as a cutter or a scissors without using a special cutting machine, the positions of the carbon fiber warps, the positions of the carbon fiber wefts, and the warp and weft Will be out of position. Furthermore, since the carbon fiber sheet 15 is formed of yarns bundled with carbon fibers, the yarns bundled with carbon fibers are frayed during cutting. That is, if the carbon fiber sheet 15 is simply cut with a normal cutting tool such as a cutter or a scissors without using a special cutting machine, the cut surface of the carbon fiber sheet 15 becomes extremely irregular. Therefore, in the present embodiment, the adhesive tape 30 is attached along the cut portion, and the carbon fiber yarn in the cut portion is held by the adhesive tape 30 so that the carbon fiber yarns in the cut portion and the vicinity thereof are relatively relative to each other. We suppress movement and fraying of thread.

  At the time of cutting the carbon fiber sheet 15, the blade of the cutting tool 35 may be inserted from the side where the adhesive tape 30 is not attached to the carbon fiber sheet 15, but the blade of the cutting tool 35 is inserted from the adhesive tape 30 side. However, relative movement between carbon fiber yarns can be more effectively suppressed. At this time, as shown in FIG. 4, the adhesive tape 30a remaining outside the edge of the sheet opening 16 is not peeled off.

  Next, as shown in FIG. 5, a masking tape (or masking sheet) 40 is pasted on the surface of the concrete housing 1 on the surface of the fiber reinforced resin film 10 to be the film opening 12 to form the film opening 12. The part is masked (S2). As the masking tape 40, for example, a material obtained by applying an adhesive to polypropylene resin, polyethylene resin or the like is used.

  Next, as shown in FIG. 6, a resin 11 for forming the fiber reinforced resin film 10 is applied to the surface of the concrete casing 1 (S3). At this time, the resin 11 may be applied on the masking tape 40.

  Next, as shown in FIG. 7, the carbon fiber sheet 15 in which the sheet opening 16 has been formed is disposed on the resin 11 applied to the surface of the concrete housing 1 (S4). Under the present circumstances, the carbon fiber sheet 15 is arrange | positioned so that the masking tape 40 affixed on the surface of the concrete housing 1 may be located in the sheet | seat opening 16 of the carbon fiber sheet 15. FIG.

  Next, as shown in FIG. 8, the carbon fiber sheet 15 is pressed by pressing a roller on the entire surface of the carbon fiber sheet 15 disposed on the resin 11, or by further applying the resin 11 on the entire surface of the carbon fiber sheet 15. The resin 11 is urged to be impregnated (S5).

  Next, before the resin 11 is completely cured, and when the resin 11 is cured to some extent, the masking tape 40 is removed and a sheet opening is formed on the carbon fiber sheet 15 as shown in FIGS. The adhesive tape 30a remaining outside the 16 edges is removed (S6). As a result, the resin 11 on the adhesive tape 30 a is also removed together with the resin 11 applied on the masking tape 40, and the portion where the masking tape 40 is attached becomes the film opening 12.

  By the way, when the resin 11 is cured to some extent, the carbon fiber yarns forming the carbon fiber sheet 15 are held to some extent by the resin 11. On the other hand, as described above with reference to FIG. 10, the adhesive tape 30 has low adhesion to the resin 11, and the support material 32 is also between the adhesive 31, the carbon fiber 17, and the resin 11. The adhesiveness between the adhesive material 31 is lower than the adhesiveness. For this reason, even if the support material 32 of the adhesive tape 30 remaining on the carbon fiber sheet 15 is peeled off from the resin 11 at this time, the relative movement of the carbon fibers 17 and the fraying of the yarn can be suppressed. In this embodiment, since the adhesive 32 between the support 31 of the adhesive tape 30 and the adhesive 31 is lower than the adhesive between the adhesive 31 and the carbon fiber 17, the adhesive of the adhesive tape 30. In some cases, only the support material 32 of the adhesive tape 30 is peeled off while a part of the material 31 remains attached to the carbon fiber 17.

  With the above, when the construction of the concrete structural material is completed and the resin 11 is completely cured, the concrete structural material is completed.

  As described above, in the present embodiment, the concrete housing 1 is covered with the fiber reinforced resin film 10 while securing the mounting region of the anchor bolts, pipes and the like on the surface of the concrete housing 1, so that the concrete housing 1 is reinforced. can do.

  Moreover, in this embodiment, as above-mentioned, by sticking the adhesive tape 30 along the cutting part of the carbon fiber sheet 15, and hold | maintaining the carbon fiber thread | yarn in a cutting part with the adhesive tape 30, this cutting part and The relative movement of the carbon fiber yarns in the vicinity and fraying of the yarns are suppressed. Furthermore, in this embodiment, even if the adhesive tape 30a remaining on the outer side of the edge of the sheet opening 16 on the carbon fiber sheet 15 is removed after the resin 11 is applied on the surface of the concrete housing 1, the carbon fiber Relative movement between yarns and fraying of yarns can be suppressed. Therefore, in this embodiment, the target cut surface of the carbon fiber sheet 15 can be obtained, and the shapes of the cut surfaces can be maintained, and the shapes of the sheet openings 16 and the film openings 12 are set to the target shapes. can do.

  In the present embodiment, the adhesive tape 30a remaining on the outside of the edge of the sheet opening 16 is peeled off in the last step (S6) during the construction of the concrete structural material, but the remaining adhesive tape 30a is removed. It does not have to be peeled off. That is, you may leave the adhesive tape 30a in the completed concrete structure material. Thus, in this embodiment, by using the above-mentioned adhesive tape 30, it is possible to leave the adhesive tape 30a or to peel off the adhesive tape 30a depending on the intention of the installer.

"Second embodiment"
Next, a second embodiment of the method for reinforcing a member according to the present invention will be described with reference to FIGS.

  As shown in FIG. 15, the concrete structural material formed by the reinforcing method of the present embodiment includes a concrete casing 1 and a fiber reinforced resin film 10 covering the surface of the concrete casing 1 as in the first embodiment. Have. Furthermore, the concrete structure material of the present embodiment includes a water absorbing material 20 disposed between the fiber reinforced resin film 10 and the surface of the concrete casing 1, and an impregnation prevention sheet that covers a part of the surface of the water absorbing material 20. 25.

  The water-absorbing material 20 is a non-woven fabric or felt made of fine fibers in the form of a plate in order to discharge water that has entered the concrete housing 1. Here, cotton, polyester fiber, polyamide fiber, acrylic fiber, or the like is used as the fiber. The plate-like water-absorbing material 20 has, for example, a vertical and horizontal length of about 50 mm to 150 mm and a thickness of 0.1 mm to 4 mm in a natural state (a state where no compressive force is received).

  The impregnation prevention sheet 25 is a sheet for preventing the resin 11 forming the fiber reinforced resin film 10 from impregnating the water absorbing material 20 and reducing its water absorption. The impregnation prevention sheet 25 is made of, for example, polypropylene resin or polyethylene resin. One surface of the plate-shaped water absorbing material 20 is covered with the impregnation prevention sheet 25, and a part of the surface is peeled off from the water absorbing material 20 in the execution process of the reinforcing method of the present embodiment.

  The water absorbing material 20 is disposed on the surface of the concrete case 1 such that the surface not covered with the impregnation prevention sheet 25 is in contact with the surface of the concrete case 1. The fiber reinforced resin film 10 covering the concrete casing 1 is formed with a film opening 12a penetrating from the concrete casing side to the outside. A part 20 a of the water absorbing material 20 is located inside the film opening 12 a and exposed to the outside, and the remaining part 20 b is located between the fiber reinforced resin film 10 and the surface of the concrete frame 1. In the water absorbing material 20, the surface of the portion 20 a exposed from the film opening 12 a is not covered with the impregnation prevention sheet 25. Note that the carbon fiber sheet 15 forming the fiber reinforced resin film 10 does not exist in the membrane opening 12a. For this reason, a sheet opening 16 corresponding to the position and size of the membrane opening 12a is formed in the carbon fiber sheet 15. Here, the size of the sheet opening 16 corresponding to the size of the film opening 12a is somewhat larger than the size of the film opening 12a. If the film opening 12a becomes larger, the sheet opening 16 also corresponds to this. And get bigger.

  Next, a method for reinforcing the concrete housing 1 will be described with reference to a flowchart shown in FIG.

  Also in the present embodiment, as in the first embodiment, first, a carbon fiber sheet 15 for forming the fiber reinforced resin film 10 is prepared, and a part of the carbon fiber sheet 15 is cut in the above-described procedure to open the sheet opening. 16 is formed (S1).

  Next, as shown in FIG. 12, the water-absorbing material 20 whose one surface is covered with the impregnation prevention sheet 25 is disposed on the surface of the concrete case 1 (S2a). Under the present circumstances, it arrange | positions so that the other surface which is not covered with the impregnation prevention sheet 25 on the surface of the plate-shaped water-absorbing material 20 may contact the surface of the concrete housing 1. As a method of fixing the water absorbing material 20 to the surface of the concrete housing 1, there are a method of fixing using an adhesive, a method of fixing using a pin, and the like. In addition, when fixing the water absorbing material 20 to the surface of the concrete housing 1 using an adhesive, if the adhesive is applied to the entire other surface of the water absorbing material 20, water absorption from the concrete housing 1 is reduced. It is preferable to apply the adhesive only to a part of the other surface of the water-absorbing material 20, for example, only the outer peripheral side.

  In FIG. 12, only one water absorbing material 20 is drawn, but actually, a plurality of water absorbing materials 20 are arranged on the surface of the concrete frame 1. At this time, it is preferable to arrange the plurality of water absorbing materials 20 so that the mutual interval is, for example, 0.5 m to 3 m. However, if the concrete housing 1 is an existing one and the surface of the concrete housing 1 is covered with the fiber reinforced resin film 10 in order to reinforce the concrete housing 1, Priority is given to disposing the water absorbing material 20 in the portion where the crack 2 appears, and it is not necessary to secure the mutual interval shown above.

  Next, as shown in FIG. 13, a resin 11 for forming the fiber reinforced resin film 10 is applied to the surface of the concrete casing 1 (S3). At this time, the resin 11 is also applied on the water absorbing material 20 covered with the impregnation prevention sheet 25.

  Next, as shown in FIG. 14, the carbon fiber sheet 15 having the sheet opening 16 formed thereon is placed on the resin 11 applied to the surface of the concrete housing 1 (S4a). At this time, a part 20 a of the water absorbing material 20 disposed on the surface of the concrete housing 1 is located in the sheet opening 16 of the carbon fiber sheet 15, and the remaining portion 20 b is the surface of the carbon fiber sheet 15 and the concrete housing 1. The carbon fiber sheet 15 is disposed so as to be positioned between the two. Then, as in the first embodiment, impregnation of the resin 11 into the carbon fiber sheet 15 is promoted by pressing a roller over the entire surface of the carbon fiber sheet 15 (S5).

  Next, before the resin 11 is completely cured, and when the resin 11 is cured to some extent, as shown in FIG. 15, the sheet opening 16 in the impregnation prevention sheet 25 covering the water absorbing material 20. The part 25a (FIG. 14) that can be exposed from the sheet is removed, and the adhesive tape 30a remaining outside the edge of the sheet opening 16 on the carbon fiber sheet 15 is removed. As a result, the resin 11 applied to the removed portion 25a of the impregnation prevention sheet 25 is also removed, and the above-described film opening 12a is formed. The exposed portion 20a is exposed to the outside through the film opening 12a (S6a).

  When removing the part 25a of the impregnation prevention sheet 25, a cut is made at a position along the edge of the sheet opening 16 on the impregnation prevention sheet 25, and then a part of the impregnation prevention sheet 25 is obtained. 25a is removed.

  Also in this embodiment, as in the first embodiment, when the resin 11 is cured to some extent, the carbon fiber yarns forming the carbon fiber sheet 15 are held to some extent by the resin 11, and the adhesive tape As described above, 30 is used. For this reason, even if the adhesive tape 30a remaining at this time is peeled off, the relative movement of the carbon fibers and the fraying of the yarns can be suppressed.

  With the above, when the construction of the concrete structural material is completed and the resin 11 is completely cured, the concrete structural material is completed.

  As mentioned above, in this embodiment, since the concrete housing 1 is covered with the fiber reinforced resin film 10, this concrete housing 1 can be reinforced. Moreover, in the present embodiment, when water from the concrete housing 1 is absorbed by the water absorbing material 20, the water is efficiently discharged from the portion 20a exposed to the outside from the membrane opening 12a in the water absorbing material 20. be able to. Therefore, in this embodiment, the strength fall of the concrete housing 1 itself can be suppressed by the water that has entered the concrete housing 1.

  Moreover, in this embodiment, since the adhesive tape 30 is affixed to the cut portion of the carbon fiber sheet 15 as in the first embodiment, a target cut surface of the carbon fiber sheet 15 can be obtained, and the cut surface is obtained. The shape of the sheet opening 16 and the film opening 12a can be set to the target shapes.

  In this embodiment, the adhesive tape 30a remaining on the outer side of the edge of the sheet opening 16 is removed in the last step (S6a) during the construction of the concrete structural material. It does not have to be peeled off. That is, you may leave the adhesive tape 30a in the completed concrete structure material.

"Third embodiment"
Next, a third embodiment of the member reinforcing method according to the present invention will be described with reference to FIGS.

  As shown in FIG. 15, the concrete structure material formed by the reinforcing method of the present embodiment is similar to the above embodiments, the concrete housing 1, and the fiber reinforced resin film 10 covering the surface of the concrete housing 1, have. However, in the concrete structure material of the present embodiment, the end edges 18 of the carbon fiber sheet 15 are abutted against each other.

  Next, a method for reinforcing the concrete frame 1 will be described with reference to a flowchart shown in FIG.

  Also in the present embodiment, as in the above embodiments, first, a carbon fiber sheet 15 for forming the fiber reinforced resin film 10 is prepared, and the carbon fiber sheet 15 is cut (S1b). However, in this embodiment, unlike the above-described embodiments, as shown in FIG. 17, the cutting is performed to make the carbon fiber sheet 15 of a regular object into a size necessary for construction. In the present embodiment as well, as in the above embodiment, the above-mentioned adhesive tape 30 is applied to the position 16a serving as the cut portion of the carbon fiber sheet 15 of the standard object, and the adhesive is used together with the carbon fiber sheet 15 of the standard object. The tape 30 is cut. As shown in FIG. 18, the cut carbon fiber sheet 15 of a standard length is cut at a position along the cut portion of the carbon fiber sheet 15 having a target size, as in the above embodiments. The adhesive tape 30a left remains.

  Next, as shown in FIG. 19, a resin 11 for forming the fiber reinforced resin film 10 is applied to the surface of the concrete case 1 (S3). Then, the carbon fiber sheet 15 is arrange | positioned on the resin 11 apply | coated to the surface of the concrete housing 1 (S4b). At this time, the cut edge 18 of the carbon fiber sheet 15 and the cut edge 18 of the other carbon fiber sheet 15 are abutted. In addition, when the concrete housing 1 is a pillar, the cut edge 18 of the same carbon fiber sheet 15 may be faced | matched. In addition, when the cut edge 18 of the carbon fiber sheet 15 and the other edge (not the cut edge) in the carbon fiber sheet 15 are abutted, the cut edge 18 of the carbon fiber sheet 15 and other edges In some cases, the carbon fiber sheet 15 is abutted with an edge (not a cut edge).

  Next, before the resin 11 is completely cured, and when the resin 11 is cured to some extent, as shown in FIG. 20, the adhesive tape 30a remaining at the position along the cut portion of the carbon fiber sheet 15 is removed. It is removed (S6b).

  Also in this embodiment, when the resin 11 is cured to some extent, the carbon fiber yarn forming the carbon fiber sheet 15 is held to some extent by the resin 11 in the same manner as the above embodiments. The tape 30 described above is used. For this reason, even if the adhesive tape 30a remaining at this time is peeled off, the relative movement of the carbon fibers and the fraying of the yarns can be suppressed.

  Next, as shown in FIG. 21, the resin 11 is further applied to the entire surface of each carbon fiber sheet 15 to promote the impregnation of the resin 11 into each carbon fiber sheet 15 (S5b). If the pressure-sensitive adhesive tape 30 is removed from the carbon fiber sheet 15 and the roller 11 is pressed against the entire surface of each carbon fiber sheet 15 to promote the impregnation of the resin 11 into the carbon fiber sheet 15, this method can be used. The resin impregnation may be promoted.

  With the above, when the construction of the concrete structural material is completed and the resin 11 is completely cured, the concrete structural material is completed.

  Also in this embodiment, since the adhesive tape 30 is affixed to the cut portion of the carbon fiber sheet 15 as in the above embodiments, the target cut surface of the carbon fiber sheet 15 can be obtained, and the cut surface of the cut surface can be obtained. The shape can be maintained, and the shape of the portion where the end edges 18 of the carbon fiber sheet 15 face each other can be formed cleanly.

  Moreover, in this embodiment, since the impregnation of the resin 11 to each carbon fiber sheet 15 is promoted (S5b) after the removal of the adhesive tape 30a (S6b), the surface of the resin 11 remaining after the adhesive tape 30a is removed. Discontinuity, in other words, the unevenness 13 (FIG. 20) on the surface of the resin 11 remaining in the portion where the adhesive tape 30 has been removed can be eliminated.

In this embodiment, the adhesive tape 30a remaining on the cut portion of the carbon fiber sheet 15 is peeled off during the construction of the concrete structure material. However, the remaining adhesive tape 30a may not be peeled off.
"Fourth embodiment"
Next, 4th embodiment of the reinforcement method of the member which concerns on this invention is described using FIGS. 22-26.

  As shown in FIG. 26, the concrete structural material formed by the reinforcing method of the present embodiment is similar to the above-described embodiments, the concrete housing 1, and the fiber reinforced resin film 10 covering the surface of the concrete housing 1, have. Furthermore, the concrete structural material of the present embodiment has a CFRP reinforcing plate 45. That is, in the present embodiment, in order to partially reinforce the concrete housing 1, a CFRP reinforcing plate 45 is disposed on the reinforcing portion, and the CFRP reinforcing plate 45 is covered with the fiber reinforced resin film 10 to form a concrete structural material. doing.

  Next, a method for reinforcing the concrete frame 1 will be described with reference to a flowchart shown in FIG.

  Also in the present embodiment, as in the above embodiments, first, a carbon fiber sheet 15 for forming the fiber reinforced resin film 10 is prepared, and the carbon fiber sheet 15 is cut (S1c). However, in the present embodiment, the carbon fiber sheet 15 is cut to a size that covers the entire CFRP reinforcing plate 45. Also in this embodiment, the above-mentioned adhesive tape 30 is affixed to a position to be a cut portion of the carbon fiber sheet 15, and the adhesive tape 30 is cut together with the carbon fiber sheet 15. The cut adhesive tape 30a (FIG. 25) remains at the position along the cut portion of the carbon fiber sheet 15 having the desired size by cutting the carbon fiber sheet 15 as in the above embodiments. ing.

  Next, as shown in FIG. 23, a masking tape 40 (or masking sheet) is applied to the outer portion of the portion of the concrete casing 1 where the fiber reinforced resin film 10 is formed, and the outer portion is masked. (S2c).

  Next, as shown in FIG. 23, the resin 11 is applied to the surface of the concrete housing 1 where the fiber reinforced resin film 10 is formed, in other words, the inner portion of the masking tape 40 that has been pasted. (S3). At this time, the resin 11 may be applied on the masking tape 40. If the part to be reinforced in the concrete frame 1 is damaged, it is preferable to repair the damaged part by applying cement to the damaged part before applying the resin 11. .

  Next, as shown in FIG. 24, the CFRP reinforcing plate 45 is disposed on the resin 11 applied to the surface of the concrete housing 1 and pressed against the surface of the concrete housing 1 (S7).

  Next, as shown in FIG. 25, the carbon fiber sheet 15 is disposed on the inner portion of the masking tape 40 so as to cover the CFRP reinforcing plate 45 (S4c). As a result, the edge of the carbon fiber sheet 15 abuts with the edge of the masking tape 40. Subsequently, impregnation of the resin 11 into the carbon fiber sheet 15 is promoted by pressing a roller over the entire surface of the carbon fiber sheet 15 or by further applying the resin 11 over the entire surface of the carbon fiber sheet 15 (S5).

  Next, before the resin 11 is completely cured, and when the resin 11 is cured to some extent, as shown in FIG. 26, the masking tape 40 is removed and a position along the cut portion of the carbon fiber sheet 15 is removed. The remaining adhesive tape 30a is removed (S6c).

  Also in this embodiment, when the resin 11 is cured to some extent, the carbon fiber yarn forming the carbon fiber sheet 15 is held to some extent by the resin 11 in the same manner as the above embodiments. The tape 30 described above is used. For this reason, even if the adhesive tape 30a remaining at this time is peeled off, the relative movement of the carbon fibers and the fraying of the yarns can be suppressed.

  With the above, when the construction of the concrete structural material is completed and the resin 11 is completely cured, the concrete structural material is completed.

  As described above, in the present embodiment, the CFRP reinforcing plate 45 is disposed on the surface of the concrete casing 1, and the CFRP reinforcing plate 45 is covered with the fiber reinforced resin film 10, so that the concrete casing 1 is strongly reinforced. Can do.

  Moreover, also in this embodiment, since the adhesive tape 30 is affixed to the cutting part of the carbon fiber sheet 15 similarly to each of the above embodiments, the intended cutting surface of the carbon fiber sheet 15 can be obtained, and the cutting is performed. The shape of the surface can be maintained, and the shape of the outer edge of the fiber reinforced resin film 10 can be changed to a clean target shape.

  The CFRP reinforcing plate 45 may be formed with a plurality of holes penetrating from the surface facing the surface of the concrete casing 1 to the opposite surface so that the resin 11 reaches the opposite surface. In this case, a resin anchor may be inserted into any of the plurality of holes, and the CFRP reinforcing plate 45 may be fixed to the concrete housing 1 by the resin anchor. In this case, as the CFRP reinforcing plate 45, a CFRP reinforcing grid plate in which a plurality of holes are formed in advance may be used. Further, instead of the CFRP reinforcing plate 45, a plurality of carbon fiber bundles knitted into a plate shape having rigidity may be used as the reinforcing plate.

  In the present embodiment, a CFRP reinforcing plate 45 is disposed on a part of the surface of the concrete housing 1, and only the CFRP reinforcing plate 45 and the periphery thereof are covered with the fiber reinforced resin film 10. However, one or more CFRP reinforcing plates 45 may be arranged on the entire surface of the concrete housing 1 so as not to overlap each other, and these CFRP reinforcing plates 45 may be covered with the fiber reinforced resin film 10. In this case, the end edge of the carbon fiber sheet 15 will abut against the end edge of the other carbon fiber sheet 15, and this abutted portion is subjected to the same processing as in the third embodiment. In addition, CFRP reinforcing plates that match the shape of the corners are arranged at the corners of the concrete frame 1, or CFRP reinforcing plates are arranged on each of the two surfaces that form the corners of the concrete frame 1, and these CFRP reinforcing plates are arranged. The fiber reinforced resin film 10 may be covered.

  Also in this embodiment, the adhesive tape 30 remaining on the cut portion of the carbon fiber sheet 15 is peeled off during the construction of the concrete structure material, but the remaining adhesive tape 30 may not be peeled off.

"Modification"
In each of the above embodiments, the member to be reinforced is the concrete housing 1, but the present invention is not limited to this, and for example, the member to be reinforced may be a resin member or a fiber reinforced resin member. Specifically, the member to be reinforced is a CFRP member, and this may be covered with a CFRP film.

  DESCRIPTION OF SYMBOLS 1 ... Concrete frame, 2 ... Crack, 10 ... Fiber reinforced resin film, 11 ... Resin, 12 ... Membrane opening 12, 15 ... Carbon fiber sheet, 16 ... Sheet opening, 20 ... Water absorption material, 25 ... Impregnation prevention sheet, 30 ... adhesive tape, 31 ... adhesive material, 32 ... support material, 35 ... cutting tool, 40 ... masking tape, 45 ... CFRP reinforcing plate

Claims (12)

In the reinforcing method of the member covering the surface of the member to be reinforced with the fiber reinforced resin film,
Cutting a carbon fiber sheet, which is a constituent element of the fiber reinforced resin film, and forming the sheet into a target size or a target shape; and
A resin application step of applying a resin, which is a component of the fiber reinforced resin film, to the surface of the member to be reinforced;
A fiber sheet arranging step of arranging the cut carbon fiber sheet on the surface of the reinforced member to which the resin is applied;
Run
In the sheet cutting step, an adhesive tape is attached along the planned cutting position on the surface of the carbon fiber sheet, and the planned cutting position of the carbon fiber sheet is cut together with the adhesive tape,
The support material of the pressure-sensitive adhesive tape that supports the pressure-sensitive adhesive material of the pressure-sensitive adhesive tape is a pressure-sensitive adhesive property between the pressure-sensitive adhesive material and the carbon fiber that forms the carbon fiber sheet and the resin. Is lower,
A member reinforcing method characterized by the above. In the reinforcement method of the member of Claim 1,
The support material of the adhesive tape is a support material in which the base material is impregnated with oil,
A member reinforcing method characterized by the above. In the reinforcement method of the member of Claim 2,
The base material of the support material is paper;
A member reinforcing method characterized by the above. In the reinforcing method of the member according to any one of claims 1 to 3,
The adhesive material of the adhesive tape has lower adhesiveness to the resin than adhesiveness to the carbon fiber,
A member reinforcing method characterized by the above. In the reinforcement method of the member as described in any one of Claim 1 to 4,
After the fiber sheet placement step, before the resin is completely cured, a tape removal step is performed to remove the adhesive tape remaining on the carbon fiber sheet after cutting.
A member reinforcing method characterized by the above. In the reinforcement method of the member according to any one of claims 1 to 5,
After the fiber sheet placement step, to the outer surface of the carbon fiber sheet on the side opposite to the reinforced member, an impregnation step for promoting the impregnation of the resin into the carbon fiber sheet is performed.
A member reinforcing method characterized by the above. In the reinforcement method of the member of Claim 6,
In the fiber sheet arrangement step, the carbon fiber sheet edges are butted against each other,
Performing the tape removal step after the fiber sheet placement step and before the impregnation step,
A member reinforcing method characterized by the above. In the reinforcement method of the member of Claim 6,
Before the resin coating step, execute a masking step of attaching a masking tape to a part of the surface of the reinforced member,
In the fiber sheet arrangement step, the cut edge of the carbon fiber sheet and the edge of the masking tape are abutted,
Performing the tape removal step after the impregnation step and performing a masking tape removal step of removing the masking tape;
A member reinforcing method characterized by the above. In the reinforcement method of the member according to any one of claims 1 to 8,
The reinforced member is a concrete frame,
A member reinforcing method characterized by the above. In the reinforcement method of the member according to claim 9,
Before the fiber sheet placement step, execute a reinforcement plate placement step of placing a reinforcement plate containing carbon fiber on at least a part of the surface of the concrete frame,
In the fiber sheet arrangement step, the reinforcing plate is covered with the carbon fiber sheet after cutting.
A member reinforcing method characterized by the above. In the reinforcement method of the member according to any one of claims 1 to 6,
The reinforced member is a concrete frame,
In the sheet cutting step, a part of the carbon fiber sheet is cut to form a sheet opening,
Before the resin application step, execute a water absorbing material arranging step of arranging a water absorbing material on a part of the surface of the concrete frame,
In the resin application step, the resin is applied on the surface of the concrete frame and the water absorbing material,
In the fiber sheet arrangement step, the sheet opening is formed on the surface of the concrete casing to which the resin is applied so that a part of the water absorbing material arranged on the surface of the concrete casing can face from the sheet opening. Arranging the carbon fiber sheet
Performing a resin removal step of removing the resin on a part of the water absorbing material facing from the sheet opening;
A member reinforcing method characterized by the above. The method for reinforcing a member according to claim 11,
The portion of the surface of the water absorbing material that does not face the surface of the concrete casing is covered with an impregnation prevention sheet that prevents the resin from impregnating the water absorbing material,
After the fiber sheet placement step and before the resin is completely cured, the resin removal is achieved by removing a portion facing the sheet opening from the impregnation prevention sheet covering the water absorbing material. Performing a process to expose a portion of the water-absorbing material;
A member reinforcing method characterized by the above.

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