JP4364116B2 - Attaching the reinforcing sheet - Google Patents

Description

  The present invention relates to a reinforcing sheet attaching method in which a reinforcing sheet is attached to a civil engineering / building structure in order to reinforce the civil engineering / building structure.

  Conventionally, there has been a method of reinforcing a structure by sticking a reinforcing sheet made of carbon fiber, aramid fiber, PBO fiber, or the like to the surface of the structure. In pasting the reinforcing sheet, conventionally, after the surface of the structure, that is, the adhesive surface, is applied with an adhesive such as an epoxy resin on the adhesive surface and the reinforcing sheet surface, the reinforcing sheet, the release sheet, and the removal sheet. A breathable sheet for air and an airbag film for securing a vacuum were set. Then, the air inside the airbag film is sucked out by an intake pump or the like and the inside is evacuated, so that the airbag film is brought into close contact with the surface side of the structure at atmospheric pressure, and the reinforcing sheet is structured. It was pressed against the surface of the object and adhered.

  By the way, in the pasting of the conventional reinforcing sheet, since the airbag film and the ventilation sheet shrink randomly as the inside of the airbag film becomes vacuum, the adhesive is random on the surface of the reinforcing sheet after curing. Wrinkles occurred and the finished appearance was impaired.

  The present invention has been made to solve the above-described conventional drawbacks, and an object of the present invention is to provide a method for attaching a reinforcing sheet that improves the aesthetic appearance of the finish.

The reinforcing sheet sticking method according to the present invention has the following configuration in order to achieve the object. That is,
The method for attaching a reinforcing sheet according to the first aspect of the present invention includes an adhesive layer arranged in order on the surface of a civil engineering / building structure from the surface side, and a reinforcing sheet for reinforcing the civil engineering / building structure. Sheet, a release member made of a release sheet or release film, and a deaeration member for deaeration, forming a covering structure, and covering the covering structure, the airbag film, Airtightly attached to a building structure, air inside the airbag film is drawn out, and the reinforcing sheet is attached to the civil engineering / building structure by the airbag film closely contacting the surface side of the civil engineering / building structure. Glue to the surface. Here, in order to prevent wrinkles of the airbag film from reaching the reinforcing sheet, the covering structure has a rigidity higher than that of the airbag film between the peeling member and the deaeration member. A sheet-like or plate-like wrinkle prevention material is provided. Thus, even if wrinkles occur in the air bag film when the air inside the air bag film is removed, the wrinkle of the air bag film is prevented by the wrinkle prevention material that separates the air bag film and the reinforcing sheet. However, it is possible to avoid extending to the reinforcing sheet. In this way, generation | occurrence | production of the wrinkle in a reinforcement sheet | seat is suppressed, and the beauty | look of the finish in the reinforcement sheet | seat improves.

  Moreover, in the sticking method of Claim 1, like the sticking method of the reinforcing sheet which concerns on invention of Claim 2, the said deaeration member may consist of corrugated cardboard or a nonwoven fabric.

  Further, like the method for sticking a reinforcing sheet according to the invention described in claim 3, in the sticking method according to claim 1, the deaeration member comprises a string or a rope, and the string or the rope is The wrinkle prevention material may be arranged at intervals. Thus, the material of this deaeration member can be reduced by arrange | positioning the string or rope as a deaeration member spaced apart from the wrinkle prevention material. Therefore, the reinforcing sheet can be attached to the surface of the civil engineering / building structure at a low cost.

  Moreover, in the sticking method of Claim 3 like the sticking method of the reinforcement sheet | seat based on invention of Claim 4, the said string or rope is previously attached to the said wrinkle prevention material, These strings or rope And a wrinkle prevention material may be formed, and the composite may be covered with the peeling member. In this way, by attaching a string or rope as a deaeration member to the wrinkle prevention material in advance, the operation of forming the covering structure is facilitated. In addition, when these cords or ropes and wrinkle prevention materials are reused in various civil engineering and building structures, these cords or ropes and wrinkle prevention materials can be used efficiently in a composite state. Can be done.

  Moreover, like the method for sticking a reinforcing sheet according to the invention described in claim 5, in the sticking method according to claim 3 or 4, the wrinkle prevention material is made of a plate material such as a plywood or a synthetic resin plate. Also good. In this way, when the wrinkle prevention material is made of a plate material such as a plywood or a synthetic resin plate, after the air inside the airbag film is evacuated, between the string and the string as a deaeration member, or between the rope and the rope Between the surface of the civil engineering / building structure and the reinforcing sheet by striking the sheet material as a wrinkle prevention material with a hammer or other impact tool through an air bag film. It can be checked whether there is an air pocket.

  In addition, the reinforcing sheet sticking method according to the invention described in claim 6 is for reinforcing the civil engineering / building structure on the surface of the civil engineering / building structure in order from the surface side. A reinforcing sheet, a release member made of a release sheet or a release film, and a deaeration member for deaeration, forming a covering structure and covering the covering structure, the airbag film, Airtightly attached to a civil engineering / building structure, the air inside the airbag film is evacuated, and the reinforcing sheet is attached to the civil engineering / building structure by the airbag film closely contacting the surface side of the civil engineering / building structure. Press and bond to the surface of the object. Here, in order to prevent wrinkles of the airbag film from reaching the reinforcing sheet, the covering structure includes a sheet-like or plate-like deaeration member having a rigidity higher than that of the airbag film. An anti-wrinkle material is also provided. As a result, even if wrinkles occur in the air bag film when the air inside the air bag film is removed, the wrinkle of the air bag film is prevented by the wrinkle prevention material that separates the air bag film and the reinforcing sheet. However, it is possible to avoid extending to the reinforcing sheet. Thus, generation of wrinkles in the reinforcing sheet is suppressed, and the finished appearance of the reinforcing sheet is improved. And since this wrinkle prevention material serves as the member for deaeration, the number of parts of a covering structure can be reduced. Therefore, the reinforcing sheet can be attached to the surface of the civil engineering / building structure at a low cost.

  Moreover, in the sticking method of Claim 6, like the sticking method of the reinforcement sheet | seat based on invention of Claim 7, the said wrinkle prevention material may consist of a nonwoven fabric.

  According to the method for sticking a reinforcing sheet according to the present invention, the wrinkle prevention material that separates the airbag film and the reinforcing sheet can prevent wrinkles of the airbag film from reaching the reinforcing sheet, and the finished product. Aesthetics are improved.

  Hereinafter, the best mode for carrying out the method for attaching a reinforcing sheet according to the present invention will be described with reference to the drawings.

  FIG. 1 shows a first embodiment of the present invention. Reference numeral 1 in the figure denotes a structure to be reinforced, such as a civil engineering / building structure such as a bridge girder. Reference numeral 2 denotes a reinforcing sheet for reinforcing the structure 1, and is made of a fiber sheet such as a carbon fiber sheet, an aramid fiber sheet, or a PBO (polyparaphenylene benzobisoxazole) fiber sheet, particularly a continuous fiber sheet. . And the structure 1 is reinforced by sticking this reinforcing sheet 2 on the surface 1a of the structure 1.

  The reinforcing sheet 2 is attached to the surface 1a of the structure 1 in order from the surface 1a side, the adhesive layer 3, the reinforcing sheet 2, and the release member 4 made of a release sheet or release film. The covering structure 10 including the deaeration member 5 for air is formed. Then, the airbag film 11 is airtightly attached to the structure 1 so as to cover the covering structure 10, the air inside the airbag film 11 is removed, and the air tightly contacts the surface 1 a side of the structure 1. With the bag film 11, the reinforcing sheet 2 is pressed against the surface 1 a of the structure 1 to be bonded. Here, in order to prevent the wrinkles of the airbag film 11 from reaching the reinforcing sheet 2, the covering structure 10 is more rigid than the airbag film 11 between the peeling member 4 and the deaeration member 5. A sheet-like or plate-like wrinkle prevention material 6 is provided. In addition, the code | symbol 7 in a figure is a pipe | tube for suction | inhalation for extracting the air inside the airbag film 11. FIG.

  Here, the adhesive layer 3 is formed, for example, by applying an adhesive made of an impregnating resin such as an epoxy resin to both or one of the adhesive surface of the surface 1a of the structure 1 and the reinforcing sheet 2. The Prior to the formation of the adhesive layer 3, the adhesive surface of the structure 1 is ground. The deaeration member 5 is a breathable member having air permeability, for example, a breathable sheet such as a cotton-like mat, a non-woven fabric, or a fabric, or a sheet of corrugated cardboard provided so that a large number of holes communicate with both ends by corrugated paper. It consists of the shape 5a. Here, the non-woven fabric used as the degassing member 5 is preferably a non-woven fabric made of long fibers, which is stronger and cheaper than a non-woven fabric made of short fibers. Further, the thickness of the nonwoven fabric is preferably about 1 mm to 5 mm, for example, in order to function as the deaeration member 5, but is not particularly limited to this value. The wrinkle prevention material 6 is made of, for example, a material that does not have air permeability. As the wrinkle prevention material 6, a flexible sheet material such as cardboard or a synthetic resin sheet, or a plate material such as a plywood or a synthetic resin plate is used. In addition, after the air inside the airbag film 11 is extracted and the inside becomes a vacuum, the adhesive (adhesive layer 3) is cured (for example, heated and cured using a curing device). After the adhesive is cured, the curing device is removed, and then the airbag film 11, the deaeration member 5, the wrinkle prevention material 6, and the peeling member 4 are removed.

  According to this method of sticking the reinforcing sheet 2, when air inside the airbag film 11 is extracted through the suction pipe 7, The wrinkle prevention material 6 that separates the film 11 and the reinforcing sheet 2 can prevent wrinkles of the airbag film 11 from reaching the reinforcing sheet 2. Thus, generation of wrinkles in the reinforcing sheet 2 is suppressed, and the finished appearance of the reinforcing sheet 2 is improved. When the deaeration member 5 is made of cardboard, the deaeration member 5 can be manufactured at a low cost, and as a result, the reinforcing sheet 2 is attached to the surface 1a of the structure 1 at a low cost. be able to.

  2 and 3 show a second embodiment of the present invention. This embodiment is the same as the first embodiment except that the deaeration member 5 is not a sheet-like material 5a but a string 5b, 5b. Here, the strings 5 b and 5 b are strings having a diameter of, for example, about 8 mm, and are arranged on the wrinkle prevention member 6 at intervals. In the illustrated embodiment, the strings 5b and 5b are arranged vertically and horizontally so as to form a mesh of about 15 cm to 30 cm, for example, about 15 cm × 30 cm. The pasting method in the second embodiment also has the same effect as the pasting method in the first embodiment. In addition, the strings 5b and 5b as the deaeration member 5 are attached to the wrinkle prevention material. By disposing 6 at an interval, the material of the deaeration member 5 can be reduced, and as a result, the reinforcing sheet 2 can be attached to the surface 1a of the structure 1 at a low cost.

  Further, here, the cords 5b and 5b are attached to the wrinkle prevention material 6 in advance to form a composite made of the cords 5b and 5b and the wrinkle prevention material 6, and the peeling member 4 is covered with the composite. You can also. In this way, by attaching the strings 5b and 5b as the deaeration member 5 to the wrinkle prevention member 6 in advance, the operation of forming the covering structure 10 becomes easy. Moreover, when these cords 5b, 5b and the wrinkle prevention material 6 are reused for various structures 1, the cords 5b, 5b and the wrinkle prevention material 6 can be used efficiently in a composite state. Work can be done.

  Furthermore, when the wrinkle prevention material 6 is made of a plate material such as a plywood or a synthetic resin plate, after the air inside the airbag film is evacuated, from between the string 5b and the string 5b as the deaeration member 5, A plate material as the prevention member 6 is struck with an impact tool such as a hammer through the airbag film 11 and the sound of the impact is discriminated, whereby an air pocket is formed between the surface 1a of the structure 1 and the reinforcing sheet 2. You can check if it exists. And when an air pocket exists between the surface 1a of this structure 1 and the reinforcing sheet 2, from the airbag film 11 to the reinforcing sheet 2, while removing the air inside the airbag film 11, An air hole can be removed by making a hole using a drill or the like, shifting the string 5b to the position of the hole, and closing the hole of the airbag film 11.

  In this embodiment, the string 5b as the deaeration member 5 is not necessarily a breathable member having breathability. That is, when the air inside the airbag film 11 is removed, the airbag film 11 is in close contact with the string 5b and the wrinkle prevention material 6, but between the wrinkle prevention materials 6 on both sides of the string 5b. A slight gap remains. And this space | gap forms the flow path of the air for deaeration.

  FIG. 4 shows a third embodiment of the present invention. This embodiment is different from the first embodiment in that the wrinkle prevention member 6 also serves as the deaeration member 5, but is otherwise the same. That is, a deaeration function as the deaeration member 5 is added to the sheet-like or plate-like wrinkle prevention material 6 having higher rigidity than the airbag film 11.

  Here, the wrinkle prevention material 6 that also serves as the deaeration member 5 is made of a breathable member having air permeability, such as a nonwoven fabric or cardboard. In particular, the non-woven fabric used as the anti-wrinkle material 6 also serving as the degassing member 5 is preferably a non-woven fabric made of long fibers, which is stronger and cheaper than a non-woven fabric made of short fibers. Further, the thickness of the nonwoven fabric is preferably about 1 mm to 5 mm, for example, in order to function as the deaeration member 5 and the wrinkle prevention material 6, but is not particularly limited to this value. Absent.

  According to the method of attaching the reinforcing sheet 2, as in the first embodiment, when the air inside the airbag film 11 is evacuated, The wrinkle prevention member 6 that separates the bag film 11 and the reinforcing sheet 2 can prevent wrinkles of the airbag film 11 from reaching the reinforcing sheet 2. Thus, generation of wrinkles in the reinforcing sheet 2 is suppressed, and the finished appearance of the reinforcing sheet 2 is improved. In addition, since the wrinkle prevention material 6 also serves as the deaeration member 5, the number of parts of the covering structure 10 can be reduced. As a result, the reinforcing sheet 2 can be applied to the surface 1a of the structure 1 at a low cost. Can be pasted. When the wrinkle prevention material 6 is made of corrugated cardboard, the corrugated cardboard wave pattern may be reflected on the reinforcing sheet 2, but the wrinkle prevention material 6, that is, the deaeration member 5 is manufactured at a low cost. The reinforcing sheet 2 can be attached to the surface 1a of the structure 1 at a lower cost.

  In addition, this invention is not necessarily limited to embodiment mentioned above, A various other change is possible. For example, the structure 1 may be a bridge slab, a bridge pier, an abutment, or the like as a civil engineering / building structure, not a bridge girder, or a pillar or a beam other than a bridge. May be. The reinforcing sheet 2 for reinforcing the structure 1 is preferably attached to the surface 1a of the structure 1 in a tensioned state, but may be attached without being tensioned.

  In the covering structure 10 shown in the first embodiment, in addition to the deaeration member 5, another deaeration member for deaeration is provided between the peeling member 4 and the wrinkle prevention member 6. It may be provided. Furthermore, in the covering structure 10 shown in the first embodiment, in addition to the wrinkle prevention material 6 between the peeling member 4 and the deaeration member 5, other wrinkle prevention materials are provided outside the deaeration member 5. May be provided.

  Moreover, in embodiment shown above, although the sheet | seat for reinforcement 2, the deaeration member 5, other deaeration members, the anti-wrinkle material 6, and other anti-wrinkle materials may be one sheet, a plurality of sheets May be used so as to overlap.

  In the covering structure 10 shown in the second embodiment, the strings 5b and 5b as the deaeration member 5 are arranged vertically and horizontally if they are arranged on the wrinkle prevention member 6 at intervals. Even if not arranged, they may be arranged vertically or horizontally, and one or a plurality of strings 5b may be arranged in a wavy pattern instead of a straight line. Moreover, you may use a rope thicker than the string 5b as the member 5 for deaeration instead of the string 5b.

  Further, in the covering structure 10 shown in the third embodiment, the wrinkle prevention material 6 that also serves as the deaeration member 5 is a corrugated cardboard provided so that a large number of holes communicate with both ends by a nonwoven fabric or corrugated paper. Even if not, it may be made of a porous plate having a large number of holes communicating so as to form an air flow path.

1 is a cross-sectional view of a first embodiment of the present invention. It is sectional drawing of 2nd Embodiment of this invention. Similarly, it is an A arrow view in FIG. It is sectional drawing of 3rd Embodiment of this invention.

Explanation of symbols

1 Structure (Civil Engineering / Building Structure)
DESCRIPTION OF SYMBOLS 1a Surface 2 Reinforcing sheet 3 Adhesive layer 4 Peeling member 5 Deaeration member 5b String 6 Wrinkle prevention material 10 Covering structure 11 Airbag film

Claims (7)

An adhesive layer arranged in order from the surface side on the surface of the civil engineering / building structure, a reinforcing sheet for reinforcing the civil engineering / building structure, a peeling member comprising a peeling sheet or a peeling film, and a deaeration A deaeration member for forming a covering structure,
Covering the covering structure, an air bag film is airtightly attached to the civil engineering / building structure,
Reinforcement that draws out air inside the airbag film and presses and adheres the reinforcing sheet to the surface of the civil engineering / building structure by the airbag film in close contact with the surface of the civil engineering / building structure. A method for pasting a sheet for use,
In order to prevent wrinkles of the airbag film from reaching the reinforcing sheet, the covering structure has a sheet shape that is more rigid than the airbag film between the peeling member and the degassing member. Or the sticking method of the sheet | seat for reinforcement in which a plate-shaped wrinkle prevention material is provided.   The method for attaching a reinforcing sheet according to claim 1, wherein the deaeration member is made of cardboard or non-woven fabric.   The method for applying a reinforcing sheet according to claim 1, wherein the deaeration member is formed of a string or a rope, and the string or the rope is disposed on the wrinkle prevention material at an interval. .   4. The string or rope is attached to the wrinkle prevention material in advance to form a composite of the string or rope and the wrinkle prevention material, and the composite is covered with the peeling member. 4. A method for attaching a reinforcing sheet as described in 1.   The method for attaching a reinforcing sheet according to claim 3 or 4, wherein the wrinkle prevention material is made of a plate material such as a plywood or a synthetic resin plate. An adhesive layer arranged in order from the surface side on the surface of the civil engineering / building structure, a reinforcing sheet for reinforcing the civil engineering / building structure, a peeling member comprising a peeling sheet or a peeling film, and a deaeration A deaeration member for forming a covering structure,
Covering the covering structure, an air bag film is airtightly attached to the civil engineering / building structure,
Reinforcement that draws out air inside the airbag film and presses and adheres the reinforcing sheet to the surface of the civil engineering / building structure by the airbag film in close contact with the surface of the civil engineering / building structure. A method for pasting a sheet for use,
In order to prevent wrinkles of the airbag film from reaching the reinforcing sheet, the covering structure also serves as a sheet-shaped or plate-shaped deaeration member having a rigidity higher than that of the airbag film. A method for attaching a reinforcing sheet, wherein a prevention material is provided. The said sheet | seat prevention material consists of nonwoven fabrics, The sticking method of the reinforcing sheet | seat of Claim 6 characterized by the above-mentioned.

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