JPH10110541A - Reinforcing method for structure - Google Patents
Reinforcing method for structureInfo
- Publication number
- JPH10110541A JPH10110541A JP29923296A JP29923296A JPH10110541A JP H10110541 A JPH10110541 A JP H10110541A JP 29923296 A JP29923296 A JP 29923296A JP 29923296 A JP29923296 A JP 29923296A JP H10110541 A JPH10110541 A JP H10110541A
- Authority
- JP
- Japan
- Prior art keywords
- carbon fiber
- fiber sheet
- building
- adhesive agent
- layer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims description 16
- 230000003014 reinforcing effect Effects 0.000 title claims description 14
- 229920000049 Carbon (fiber) Polymers 0.000 claims abstract description 38
- 239000004917 carbon fiber Substances 0.000 claims abstract description 38
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims abstract description 37
- 239000000853 adhesive Substances 0.000 claims abstract description 30
- VVQNEPGJFQJSBK-UHFFFAOYSA-N Methyl methacrylate Chemical compound COC(=O)C(C)=C VVQNEPGJFQJSBK-UHFFFAOYSA-N 0.000 claims abstract description 9
- 229920000800 acrylic rubber Polymers 0.000 claims abstract description 5
- 229920000058 polyacrylate Polymers 0.000 claims abstract description 5
- 230000001070 adhesive effect Effects 0.000 claims description 27
- 229920001084 poly(chloroprene) Polymers 0.000 claims description 3
- 239000007921 spray Substances 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 abstract description 3
- 230000002787 reinforcement Effects 0.000 abstract description 2
- 239000004820 Pressure-sensitive adhesive Substances 0.000 abstract 4
- 239000003795 chemical substances by application Substances 0.000 abstract 4
- 239000010410 layer Substances 0.000 description 7
- 229920002239 polyacrylonitrile Polymers 0.000 description 7
- 238000010276 construction Methods 0.000 description 3
- 230000037303 wrinkles Effects 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000012790 adhesive layer Substances 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 238000003916 acid precipitation Methods 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 239000011280 coal tar Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000011343 solid material Substances 0.000 description 1
- 238000010257 thawing Methods 0.000 description 1
- 238000009941 weaving Methods 0.000 description 1
- 239000002759 woven fabric Substances 0.000 description 1
Landscapes
- Reinforcement Elements For Buildings (AREA)
- Working Measures On Existing Buildindgs (AREA)
- Adhesives Or Adhesive Processes (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、建造物の補強方法
に関し、特に鉄道、道路等の橋脚、煙突、灯台等のなど
のコンクリート建造物の補強方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for reinforcing a building, and more particularly to a method for reinforcing a concrete structure such as a pier such as a railway or a road, a chimney, and a lighthouse.
【０００２】[0002]
【従来の技術及び発明が解決しようとする課題】昨今、
構造物における老朽化にともなう耐荷力の低下、塩害や
凍結融解、酸性雨等による劣化の進行に起因して、巨大
地震発生時に生じる建造物の破壊が問題となっており、
その対策が急がれている。その対策の一つとして、建造
物の表面に鉄の１０倍もの強度を有する炭素繊維シート
を接着して、建造物を補強する工法が普及しつつある。2. Description of the Related Art
Due to the deterioration of the load capacity due to the aging of the structure, the deterioration of the structure caused by salt damage, freezing and thawing, acid rain, etc.
The measures are urgent. As one of the countermeasures, a construction method of reinforcing a building by bonding a carbon fiber sheet having ten times the strength of iron to the surface of the building is becoming widespread.
【０００３】前記捕強方法においては、建造物表面に炭
素繊維シートを接着する際には、まず接着剤を建造物表
面に塗布し、その上に炭素繊維シートを積み重ねて施工
しているが、広い建造物表面に塗布された広い接着剤面
上に比較的広い炭素繊維シートを平らに積み重ねて接合
することは容易でなく、ところどころに皺が生じてしま
い平らで奇麗な炭素繊維シート面を形成することは至難
であった。その結果、皺が生じた表面に表面仕上げを施
しても、最終表面は不細工なものとなってしまってい
た。[0003] In the above-mentioned method, when bonding a carbon fiber sheet to the surface of a building, first, an adhesive is applied to the surface of the building, and the carbon fiber sheet is stacked on the surface of the building, and the construction is performed. It is not easy to stack and bond relatively wide carbon fiber sheets on a wide adhesive surface applied to a wide building surface, and wrinkles occur in some places, forming a flat and clean carbon fiber sheet surface It was very difficult to do. As a result, even if the wrinkled surface is subjected to a surface finish, the final surface is unfinished.
【０００４】[0004]
【課題を解決するための手段】そこで、本発明者らは鋭
意研究の結果、そうした問題を容易に解決できる方法を
開発し、下記本発明を提供するに至った。 （１）建造物表面に仮着性粘着剤を塗布した後、その表
面に炭素繊維シートを貼着して仮着し、次いで該仮着し
た炭素繊維シート面をしごいて平面化し、その後、該炭
素繊維シート内にメチルメタクリレートプレポリマー系
接着剤を含浸させ、最後に同含浸処理済みの炭素繊維シ
ート面を表面仕上げすることを特徴とする建造物の補強
方法。 （２）仮着性粘着剤が、アクリルゴム系のものであるこ
とを特徴とする（１）項記載の建造物の補強方法。 （３）仮着性粘着剤が、クロロプレンゴム系のものであ
ることを特徴とする（１）項１記載の建造物の補強方
法。 （４）仮着性粘着剤が、圧縮気体圧により容器内の仮着
性粘着剤液を噴出するスプレー装置から噴出されること
を特徴とする（１）項ないし（３）項のいずれかに記載
の建造物の補強方法。 （５）炭素繊維シートが、ＰＡＮ系の炭素繊維シートで
あることを特徴とする（１）項ないし（４）項のずれか
に記載の建造物の補強方法。 （６）炭素繊維シートが、ＰＡＮ系の炭素繊維シートで
あることを特徴とする（１）項ないし（５）項のずれか
に記載の建造物の補強方法。The inventors of the present invention have conducted intensive studies, and as a result, have developed a method that can easily solve such a problem, and have provided the present invention described below. (1) After applying a temporary adhesive to the surface of a building, a carbon fiber sheet is attached to the surface and temporarily attached, and then the temporarily attached carbon fiber sheet is flattened by flattening. A method for reinforcing a building, comprising impregnating a methyl methacrylate prepolymer-based adhesive in the carbon fiber sheet, and finally finishing the surface of the impregnated carbon fiber sheet. (2) The method for reinforcing a building according to (1), wherein the temporary adhesive is an acrylic rubber-based adhesive. (3) The method for reinforcing a building according to (1), wherein the temporary adhesive agent is a chloroprene rubber-based adhesive. (4) The method according to any one of items (1) to (3), wherein the temporary adhesive is ejected from a spray device that ejects the temporary adhesive in the container by a compressed gas pressure. The building reinforcement method described. (5) The method for reinforcing a building according to any one of (1) to (4), wherein the carbon fiber sheet is a PAN-based carbon fiber sheet. (6) The method for reinforcing a building according to any one of (1) to (5), wherein the carbon fiber sheet is a PAN-based carbon fiber sheet.
【０００５】上記における建造物としては、主にコンク
リート構造物である、長大橋梁のコンクリート橋脚、地
下構造物の支柱、灯台等の高い耐震性が要求される建造
物が挙げられる。本発明でいう仮着粘着剤は、粘着剤の
一種で、アクリルゴム系、クロロプレンゴム系等の材料
で、貼着・剥離可能な付箋に採用されているごとき粘着
剤であり、あまり粘着性が強くなく、押当てて粘着させ
たシート等の固形材を容易に引きはがし、かつ再度貼着
すことができるものである。炭素繊維シートは、ポリア
クリロニトリル（ＰＡＮ）繊維を原料として製造された
ＰＡＮ系やコールタールを原料として製造されたピッチ
系、その他の炭素繊維シートを使用することができる
が、ＰＡＮ系のものが強度等に優れるため好ましい。同
炭素繊維シートは、炭素繊維同士を縦糸横糸に用いて織
った織布状のものが好ましい。炭素繊維シートを建造物
表面に接着する接着剤としては、メチルメタクリレート
プレポリマー（ＭＭＡ）系接着剤が好ましく、これは常
温下で３０〜６０分間で硬化するため作業が短時間でで
きる。[0005] Examples of the above-mentioned buildings include structures that are required to have high earthquake resistance, such as concrete piers of long-sized bridges, columns of underground structures, and lighthouses, which are mainly concrete structures. The temporary adhesive referred to in the present invention is a kind of adhesive, an acrylic rubber-based material, a chloroprene rubber-based material, or the like, which is used as a sticky / peelable sticky note, and has a very low adhesive property. It is not strong and can easily peel off a solid material such as a sheet that has been pressed and adhered, and can be attached again. As the carbon fiber sheet, a PAN-based sheet manufactured using polyacrylonitrile (PAN) fiber as a raw material, a pitch-based carbon fiber manufactured using coal tar as a raw material, and other carbon fiber sheets can be used. It is preferable because of its excellent properties. The carbon fiber sheet is preferably a woven fabric formed by weaving carbon fibers into warp and weft. As the adhesive for adhering the carbon fiber sheet to the surface of the building, a methyl methacrylate prepolymer (MMA) -based adhesive is preferable, and since it cures at room temperature for 30 to 60 minutes, the work can be performed in a short time.
【０００６】[0006]
【発明の実施の形態】以下に本発明の実施の形態を説明
する。高架高速道路構造物を支持するコンクリート柱の
外周面に炭素繊維シートを巻回接合して補強する例を図
面に基づいて説明する。まず図１に前記コンクリート柱
への施工断面図を示すごとく、下記工程により各層を積
層する。 （ａ）コンクリート柱１の外周面に、スプレータイプの
アクリルゴム系仮着性粘着剤（例えば、「スプレーのり
５５」（商品名：住友スリーエム社製））をスプレー塗
布して仮着性粘着剤層２を形成する。 （ｂ）次いでその層２面上にＰＡＮ系炭素繊維シート３
を押し当てて仮着し、その上からハケ又はローラを押圧
移動してシート３をしごくごとくし、平らに押し広げて
皺をなくし平面化する。この際、皺になっているシート
３の部分は容易に少し引きはがして広げ、コンクリート
柱１面へ再度押し当てながらしごくことにより、全面的
に平らな炭素繊維シート３層が形成される。 （ｃ）前記平らな炭素繊維シート３層の上からメチルメ
タクリレートプレポリマー系接着剤４を炭素繊維シート
３内へさらに仮着粘着剤層２内へ押入するようにして含
浸させる。 （ｄ）最後に同含浸処理済みの炭素繊維シート３層面へ
トップコート塗布して、トップコート表面仕上層５を形
成する。Embodiments of the present invention will be described below. An example in which a carbon fiber sheet is wound and joined to the outer peripheral surface of a concrete pillar supporting an elevated highway structure to reinforce the concrete pillar will be described with reference to the drawings. First, as shown in FIG. 1 which is a sectional view showing the construction of the concrete column, each layer is laminated by the following steps. (A) Spray-type acrylic rubber-based temporary adhesive (for example, “Spray Glue 55” (trade name: manufactured by Sumitomo 3M Limited)) is spray-applied to the outer peripheral surface of concrete column 1 to temporarily adhere. The layer 2 is formed. (B) Then, a PAN-based carbon fiber sheet 3 is formed on the surface of the layer 2
Is pressed and temporarily attached, and a brush or a roller is pressed and moved from above to flatten the sheet 3 and spread it flat to flatten it without wrinkles. At this time, the wrinkled portion of the sheet 3 is easily peeled off slightly and spread, and then pressed again against the surface of the concrete column to form a three-layer carbon fiber sheet which is entirely flat. (C) A methyl methacrylate prepolymer-based adhesive 4 is impregnated into the carbon fiber sheet 3 from the top of the flat carbon fiber sheet 3 by further pressing it into the temporary adhesive layer 2. (D) Finally, a topcoat is applied to the three-layer surface of the impregnated carbon fiber sheet to form a topcoat surface finishing layer 5.
【０００７】[0007]
【発明の効果】上記のごとく本発明によれば、建造物表
面への炭素繊維シートの貼着が容易でかつ皺が生じたよ
うな場合には随時少し引きはがして再度と押し当てるこ
により修正して平らに貼着することができるため、次工
程の炭素繊維シート内へのメチルメタクリレートプレポ
リマー系接着剤の含浸作業が安定的に容易かつ一気に実
施することができる。その結果、従来法に比較して作業
が容易となり、しかも失敗なしに短時間で建造物の炭素
繊維シート積層による補強が達成できる。As described above, according to the present invention, when the carbon fiber sheet can be easily adhered to the surface of a building and wrinkles are generated, it is corrected by peeling it off a little at any time and pressing it again. Therefore, the next step of impregnating the carbon fiber sheet with the methyl methacrylate prepolymer-based adhesive can be stably performed easily and at once. As a result, the work becomes easier as compared with the conventional method, and the building can be reinforced by the carbon fiber sheet lamination in a short time without failure.
【図１】本発明におけるコンクリート柱１表面への補強
施工断面図。FIG. 1 is a cross-sectional view of reinforcing work on the surface of a concrete column 1 according to the present invention.
１：コンクリート柱， ２：仮着性粘着剤層， ３：ＰＡＮ系炭素繊維シート， ４：メチルメタクリレートプレポリマー系接着剤， ５：トップコート層， 1: Concrete column, 2: Temporary adhesive layer, 3: PAN-based carbon fiber sheet, 4: Methyl methacrylate prepolymer-based adhesive, 5: Top coat layer,
Claims (5)
その表面に炭素繊維シートを貼着して仮着し、次いで該
仮着した炭素繊維シート面をしごいて平面化し、その
後、該炭素繊維シート内にメチルメタクリレートプレポ
リマー系接着剤を含浸させ、最後に同含浸処理済みの炭
素繊維シート面を表面仕上げすることを特徴とする建造
物の補強方法。After applying a temporary adhesive on the surface of a building,
A carbon fiber sheet is adhered to the surface for temporary attachment, then the temporarily attached carbon fiber sheet surface is flattened by flattening, and then the carbon fiber sheet is impregnated with a methyl methacrylate prepolymer adhesive. Lastly, a method for reinforcing a building, characterized by finishing the surface of the impregnated carbon fiber sheet.
あることを特徴とする請求項１記載の建造物の補強方
法。2. The method of reinforcing a building according to claim 1, wherein the temporary adhesive is an acrylic rubber-based adhesive.
のであることを特徴とする請求項１記載の建造物の補強
方法。3. The method for reinforcing a building according to claim 1, wherein the temporary adhesive is a chloroprene rubber-based adhesive.
の仮着性粘着剤液を噴出するスプレー装置から噴出され
ることを特徴とする請求項１ないし３のいずれかに記載
の建造物の補強方法。4. The temporary adhesive according to claim 1, wherein the temporary adhesive is ejected from a spray device which ejects the temporary adhesive in the container by a compressed gas pressure. How to reinforce the building.
ートであることを特徴とする請求項１ないし４のずれか
に記載の建造物の補強方法。5. A method for reinforcing a building according to claim 1, wherein the carbon fiber sheet is a PAN-based carbon fiber sheet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29923296A JPH10110541A (en) | 1996-10-06 | 1996-10-06 | Reinforcing method for structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29923296A JPH10110541A (en) | 1996-10-06 | 1996-10-06 | Reinforcing method for structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH10110541A true JPH10110541A (en) | 1998-04-28 |
Family
ID=17869862
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP29923296A Pending JPH10110541A (en) | 1996-10-06 | 1996-10-06 | Reinforcing method for structure |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH10110541A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010053676A (en) * | 2008-08-26 | 2010-03-11 | Eco Easel:Kk | Maeda model ii |
| WO2017090369A1 (en) * | 2015-11-24 | 2017-06-01 | 日東電工株式会社 | Method for applying pressure-sensitive adhesive sheet and device for applying pressure-sensitive adhesive sheet |
| US20180340096A1 (en) * | 2015-11-24 | 2018-11-29 | Nitto Denko Corporation | Adhesive sheet joining method and adhesive sheet joining apparatus |
| CN109406582A (en) * | 2018-12-28 | 2019-03-01 | 南水北调东线总公司 | A kind of Structure Damage Identification using carbon fiber change in resistance |
-
1996
- 1996-10-06 JP JP29923296A patent/JPH10110541A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010053676A (en) * | 2008-08-26 | 2010-03-11 | Eco Easel:Kk | Maeda model ii |
| WO2017090369A1 (en) * | 2015-11-24 | 2017-06-01 | 日東電工株式会社 | Method for applying pressure-sensitive adhesive sheet and device for applying pressure-sensitive adhesive sheet |
| US20180340096A1 (en) * | 2015-11-24 | 2018-11-29 | Nitto Denko Corporation | Adhesive sheet joining method and adhesive sheet joining apparatus |
| US10723917B2 (en) | 2015-11-24 | 2020-07-28 | Nitto Denko Corporation | Adhesive sheet joining method and adhesive sheet joining apparatus |
| CN109406582A (en) * | 2018-12-28 | 2019-03-01 | 南水北调东线总公司 | A kind of Structure Damage Identification using carbon fiber change in resistance |
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