JP2545259B2 - Method of strengthening structures with carbon fiber reinforced plastic plates - Google Patents

Method of strengthening structures with carbon fiber reinforced plastic plates

Info

Publication number
JP2545259B2
JP2545259B2 JP2100288A JP2100288A JP2545259B2 JP 2545259 B2 JP2545259 B2 JP 2545259B2 JP 2100288 A JP2100288 A JP 2100288A JP 2100288 A JP2100288 A JP 2100288A JP 2545259 B2 JP2545259 B2 JP 2545259B2
Authority
JP
Japan
Prior art keywords
carbon fiber
fiber reinforced
reinforced plastic
plastic plate
strengthening
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.)
Expired - Lifetime
Application number
JP2100288A
Other languages
Japanese (ja)
Other versions
JPH01195025A (en
Inventor
恵次 冷水
雄司 石田
登 石川
稔 沢出
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shimizu Corp
Original Assignee
Shimizu Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Shimizu Corp filed Critical Shimizu Corp
Priority to JP2100288A priority Critical patent/JP2545259B2/en
Publication of JPH01195025A publication Critical patent/JPH01195025A/en
Application granted granted Critical
Publication of JP2545259B2 publication Critical patent/JP2545259B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C73/00—Repairing of articles made from plastics or substances in a plastic state, e.g. of articles shaped or produced by using techniques covered by this subclass or subclass B29D
    • B29C73/24—Apparatus or accessories not otherwise provided for
    • B29C73/30—Apparatus or accessories not otherwise provided for for local pressing or local heating
    • B29C73/32—Apparatus or accessories not otherwise provided for for local pressing or local heating using an elastic element, e.g. inflatable bag
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2307/00—Use of elements other than metals as reinforcement

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)

Description

【発明の詳細な説明】 産業上の利用分野 本発明は、コンクリート構造物の梁、床版、その他種
々の構築物の補強、更には構築物の防水、空気漏れ防止
等と言った構築物の補修等をも含む構築物の強化方法に
関するものであり、特に斯る強化を炭素繊維強化プラス
チック板により行なう構築物強化方法に関するものであ
る。Description: TECHNICAL FIELD The present invention relates to reinforcement of beams, floor slabs, and other various structures for concrete structures, as well as repair of structures such as waterproofing of structures and air leakage prevention. The present invention also relates to a method for strengthening a structure including the above, and particularly to a method for strengthening a structure in which such reinforcement is performed with a carbon fiber reinforced plastic plate.

従来の技術 コンクリート構造物の梁、床版、その他種々の構築物
は永年の使用と共に劣化し、曲げ応力等の作用により強
度が低下し補強の必要が生じたり、場合によっては防
水、空気漏れ防止等の種々の補修、強化を行なう必要が
生じる。Conventional technology Beams, floor slabs, and various other structures of concrete structures deteriorate over the years and their strength decreases due to the effects of bending stress and the need for reinforcement, and in some cases waterproofing, air leakage prevention, etc. It is necessary to carry out various repairs and strengthening.

従来、このような構築物の強化は、例えばコンクリー
ト構造物の床版（コンクリートスラブ）の劣化による強
度低下を回復するため補強材料として鉄板が使用され、
該鉄板をアンカーボルト等を使用して補強箇所に固定す
る方法が行なわれていた。斯る強化方法は、補強材料が
鉄板であるということから重量が大となり、大面積の補
強作業は補強材料の取扱いが困難であり、又補強箇所に
よっては鉄板の取付け作業自体が不可能か、極めて困難
なことが多く作業効率が悪く問題があった。Conventionally, in the reinforcement of such a structure, for example, an iron plate is used as a reinforcing material to recover the strength reduction due to the deterioration of the floor slab (concrete slab) of the concrete structure,
A method of fixing the iron plate to a reinforced portion using an anchor bolt or the like has been performed. Such a strengthening method has a large weight because the reinforcing material is an iron plate, and it is difficult to handle the reinforcing material in a large-area reinforcing work. In many cases, it was extremely difficult, resulting in poor work efficiency and problems.

このような問題を解決するべく、重量が極めて軽量
で、被強化面への取付け固定方法も容易であり、且つ引
張強度及び弾性率が大であり、更には耐候性、耐水性、
耐熱性等に優れている炭素繊維強化プラスチック板を補
強材料として使用する補強方法が提案されている。In order to solve such problems, the weight is extremely light, the method of attaching and fixing to the reinforced surface is easy, and the tensile strength and elastic modulus are large, and further, the weather resistance, the water resistance,
A reinforcing method using a carbon fiber reinforced plastic plate having excellent heat resistance as a reinforcing material has been proposed.

発明が解決しようとする課題 このような炭素繊維強化プラスチック板を補強材料又
は他の目的のための補修材料として使用する強化方法は
極めて好適にコンクリートスラブ、更には種々の構築物
の補強、防水、空気漏れ防止等の補強、強化をなし得る
ものであり、又使用される材料が極めて軽量であるので
その取扱いも容となり作業効率が向上するという種々の
利点を有している。The method of strengthening using such a carbon fiber reinforced plastic plate as a reinforcing material or a repair material for other purposes is very suitable for concrete slabs, and also for reinforcing, waterproofing, and air-conditioning of various structures. It has various advantages that it can be reinforced and reinforced such as leakage prevention, and that the material used is extremely lightweight and can be handled easily, improving work efficiency.

従来提案されている炭素繊維強化プラスチック板を使
用した強化方法によると、第３図に図示されるように、
例えばコンクリートスラブ１の表面に炭素繊維強化プラ
スチック板２を貼付けるためには、先ずコンクリートス
ラブ表面に接着剤３又はプライマー及び接着剤を塗布
し、その後炭素繊維強化プラスチック板２を貼付するこ
とが必要とされる。このとき、一般にコンクリートスラ
ブ表面は一様な平面となっていることは少なく凹凸状態
となっている。従って、接着剤３をコンクリートスラブ
表面は一様厚さにて塗布し、この上に炭素繊維強化プラ
スチック板を貼付けた場合には、特に被強化面1aが広い
面積にわたるときには、作業員が炭素繊維強化プラスチ
ック板２を被強化面1aに一様な押圧力にて貼付けること
が極めて困難であり、図示されるように、炭素繊維強化
プラスチック板２が構築物被強化面1aに対して傾斜して
接合されたり、場合によっては、炭素繊維強化プラスチ
ック板２と被強化面1aとの間に接着剤が存在しない空隙
部４が生じることがあった。According to the conventional method of strengthening using a carbon fiber reinforced plastic plate, as shown in FIG.
For example, in order to attach the carbon fiber reinforced plastic plate 2 to the surface of the concrete slab 1, it is necessary to first apply the adhesive 3 or the primer and the adhesive to the surface of the concrete slab, and then attach the carbon fiber reinforced plastic plate 2. It is said that At this time, in general, the surface of the concrete slab is rarely a flat surface and is in an uneven state. Therefore, when the adhesive 3 is applied to the surface of the concrete slab with a uniform thickness and the carbon fiber reinforced plastic plate is stuck on the surface of the concrete slab, especially when the reinforced surface 1a covers a large area, the operator can It is extremely difficult to attach the reinforced plastic plate 2 to the reinforced surface 1a with a uniform pressing force, and as shown in the figure, the carbon fiber reinforced plastic plate 2 is inclined with respect to the reinforced structure surface 1a. In some cases, they were joined, or in some cases, a void portion 4 without an adhesive was formed between the carbon fiber reinforced plastic plate 2 and the reinforced surface 1a.

このような強化方法によると、美感上好ましくないの
みならず、空隙部４の存在は炭素繊維強化プラスチック
板２による補修強化効果を低減させる原因となった。こ
のような問題は、補強以外の防水、空気漏れ等の他の補
修の際にも同様の問題となった。According to such a strengthening method, not only is it aesthetically unpleasant, but the presence of the voids 4 causes a reduction in the repair strengthening effect of the carbon fiber reinforced plastic plate 2. Such a problem also occurs when repairing other than reinforcement such as waterproofing and air leakage.

このような空隙部の存在をなくするには、接着剤の塗
布厚さを厚くし、且つ作業員による極めて慎重な貼付け
作業を必要とした。これは作業能率を低下せしめるのみ
ならず、必要以上に接着剤層の厚さを厚くすると、特に
強度が低下することが本発明者等の研究実験の結果分か
った。In order to eliminate the presence of such voids, it was necessary to increase the thickness of the adhesive applied and to perform extremely careful sticking work by the operator. It was found as a result of research experiments by the present inventors that this not only lowers the work efficiency, but also the strength is particularly lowered when the thickness of the adhesive layer is increased more than necessary.

又、別法として、炭素繊維強化プラスチック板を貼付
けるコンクリートスラブ表面を一様平面となるように研
摩機で研摩し（コンクリート面ケレン）、その上に接着
剤を薄く塗布することが考えられるが、斯るコンクリー
トスラブの表面処理作業は多大の時間と労力を要し、又
強化場所によってはこのような表面処理作業が不可能か
或いは極めて困難な場合もあり、実際的ではない。Alternatively, it is conceivable that the surface of the concrete slab to which the carbon fiber reinforced plastic plate is attached is ground by a sanding machine (concrete surface scraper) so that it becomes a flat surface, and a thin adhesive is applied on top of it. The surface treatment work of such a concrete slab requires a lot of time and labor, and depending on the strengthening place, such a surface treatment work may be impossible or extremely difficult, which is not practical.

従って、本発明の目的は、極めて作業性が良く、炭素
繊維強化プラスチック板を構築物の被強化面に平らに貼
付けることができ、且つ炭素繊維強化プラスチック板と
被強化面との間に空隙が形成されるのを防止し、十分な
補強、補修、その他種々の強化効果を達成することので
きる、コンクリート構造物の梁、床版、その他種々の構
築物の補強、更には構築物の防水、空気漏れ防止等と言
った構築物の強化を好適に行なうための構築物の強化方
法を提供することである。Therefore, an object of the present invention is that the workability is extremely good, the carbon fiber reinforced plastic plate can be evenly attached to the reinforced surface of the construction, and a gap is formed between the carbon fiber reinforced plastic plate and the reinforced surface. Reinforcement of concrete structure beams, floor slabs and other various structures, as well as waterproofing and air leakage of structures that can prevent formation and achieve sufficient reinforcement, repair and various other strengthening effects. It is an object of the present invention to provide a method of strengthening a structure for suitably strengthening the structure such as prevention.

課題を解決するための手段 上記諸目的は本発明に係る構築物の強化方法にて達成
される。要約すれば本発明は、構築物の被強化面に接着
剤を介して炭素繊維強化プラスチック板を貼付け、次い
でエアーバッグを備えた押圧手段により前記炭素繊維強
化プラスチック板を被強化面の方へと押圧し、構築物被
強化面に該炭素繊維強化プラスチック板を固着すること
を特徴とする構築物の強化方法である。好ましくは、炭
素繊維強化プラスチック板はスペーサにより構築物被強
化面よりの距離が所定の値に調整されて設置され、更
に、エアーバッグは加熱手段を内蔵することもでき、
又、押圧手段は、エアーバッグに空気を送給するエア供
給手段と、該エアバッグを炭素繊維強化プラスチック板
の方へと押付けるサポート部材とを有する構成とされ得
る。Means for Solving the Problems The above objects are achieved by the method for strengthening a structure according to the present invention. In summary, the present invention is to adhere a carbon fiber reinforced plastic plate to the reinforced surface of a structure via an adhesive, and then press the carbon fiber reinforced plastic plate toward the reinforced surface by a pressing means equipped with an air bag. Then, the carbon fiber reinforced plastic plate is fixed on the surface to be reinforced of the structure. Preferably, the carbon fiber reinforced plastic plate is installed by adjusting the distance from the structure-reinforced surface by a spacer to a predetermined value, and the air bag can also have a heating means built-in.
Further, the pressing means may be configured to have an air supply means for supplying air to the air bag and a support member for pressing the air bag toward the carbon fiber reinforced plastic plate.

実施例 次に、本発明に係る構築物強化方法を図面に即して更
に詳しく説明する。Example Next, the method for strengthening a construct according to the present invention will be described in more detail with reference to the drawings.

先ず、本発明に使用する炭素繊維強化プラスチック板
について説明する。First, the carbon fiber reinforced plastic plate used in the present invention will be described.

炭素繊維強化プラスチック板は任意の構造とし得る
が、例えば、強化繊維として炭素繊維（本明細書にて
「炭素繊維」とは黒鉛繊維をも含む意味にて用いる。）
を使用し、熱硬化性の又は熱可塑性のマトリクス樹脂組
成物を使用して、通常の方法にて炭素繊維強化プリプレ
グを作製し、所定寸法に切断し、硬化して補修板を製造
する。The carbon fiber reinforced plastic plate may have any structure, but for example, carbon fiber as a reinforcing fiber (in the present specification, "carbon fiber" is also used to include graphite fiber).
Using a thermosetting or thermoplastic matrix resin composition, a carbon fiber reinforced prepreg is produced by an ordinary method, cut into a predetermined size, and cured to produce a repair plate.

更に説明すると、炭素繊維としては、ピッチ系炭素繊
維、PAN系炭素繊維等任意の市販の炭素繊維を使用する
ことができるが、好ましくは引張強度2.0GPa以上、弾性
率200GPa以上とされる高強度高弾性率の炭素繊維が使用
される。一般に、直径７〜12μｍ程度のフィラメントを
3000〜24000本集束合糸することにより形成された炭素
繊維が使用される。More specifically, as the carbon fiber, pitch-based carbon fiber, any commercially available carbon fiber such as PAN-based carbon fiber can be used, but preferably has a high tensile strength of 2.0 GPa or more and an elastic modulus of 200 GPa or more. High modulus carbon fibers are used. Generally, a filament with a diameter of 7-12 μm
3000 to 24,000 carbon fibers formed by bundling yarn are used.

マトリクス樹脂組成物を構成する熱硬化性マトリクス
樹脂としては、エポキシ樹脂、不飽和ポリエステル樹
脂、ポリウレタン樹脂、ジアリルフタレート樹脂、フェ
ノール樹脂等が使用可能であり、更に硬化温度が50〜15
0℃となるように硬化剤その他の付与剤、例えば可撓性
付与剤等が適当に選択される。従って、好ましい一例を
挙げれば、熱硬化性樹脂としてはエポキシ樹脂が好まし
く、使用可能のエポキシ樹脂としては、例えば、（１）
グリシジルエーテル系エポキシ樹脂（ビスフェノール
Ａ、Ｆ系エポキシ樹脂、ノボラック系エポキシ樹脂、臭
素化ビスフェノールＡ系エポキシ樹脂）；（２）環式脂
肪族エポキシ樹脂；（３）グリシジルエステル系エポキ
シ樹脂；（４）グリシジルアミン系エポキシ樹脂；
（５）複素環式エポキシ樹脂；その他種々のエポキシ樹
脂から選択される１種又は複数種が使用され、特に、ビ
スフェノールＡ及びＦ、グリシジルアミン系エポキシ樹
脂が好適に使用される。又、硬化剤としてはジアミノジ
フェニルスルフォン（DDS）、ジアミノジフェニルメタ
ン（DDM）等が好適に使用される。又、熱可塑性マトリ
クス樹脂としては、ポリアセタール樹脂、飽和ポリエス
テル樹脂、ポリアミド樹脂、ポリスチロール樹脂、ポリ
カーボネイト樹脂、塩化ビニル樹脂、ポリエチレン樹
脂、ポリプロピレン樹脂、アクリル樹脂等が好適であ
る。As the thermosetting matrix resin constituting the matrix resin composition, an epoxy resin, an unsaturated polyester resin, a polyurethane resin, a diallyl phthalate resin, a phenol resin or the like can be used, and the curing temperature is 50 to 15
A curing agent and other imparting agents such as a flexibility imparting agent are appropriately selected so that the temperature becomes 0 ° C. Therefore, as a preferred example, the thermosetting resin is preferably an epoxy resin, and the usable epoxy resin is, for example, (1)
Glycidyl ether epoxy resin (bisphenol A, F epoxy resin, novolac epoxy resin, brominated bisphenol A epoxy resin); (2) cycloaliphatic epoxy resin; (3) glycidyl ester epoxy resin; (4) Glycidyl amine epoxy resin;
(5) Heterocyclic epoxy resin; one or more kinds selected from other various epoxy resins are used, and bisphenol A and F and glycidyl amine epoxy resin are particularly preferably used. As the curing agent, diaminodiphenyl sulfone (DDS), diaminodiphenylmethane (DDM) and the like are preferably used. Further, as the thermoplastic matrix resin, polyacetal resin, saturated polyester resin, polyamide resin, polystyrene resin, polycarbonate resin, vinyl chloride resin, polyethylene resin, polypropylene resin, acrylic resin and the like are preferable.

炭素繊維強化プラスチック板は通常の態様にて製造し
得るが、簡単に説明すると、所定の幅を有した、連続的
に送給される下フィルムに長繊維の炭素繊維を連続的に
供給すると共に粘度100000〜500000ポアズとされる、例
えば熱硬化性マトリクス樹脂組成物を炭素繊維へと供給
し、該炭素繊維にロール等を使用して加圧加熱含浸さ
せ、所定厚さ、通常0.05〜0.3mmとし、予備硬化し半硬
化の状態で上カバーフィルムにて挟持して巻取りロール
に巻取ることにより製造される。使用される炭素繊維の
物性、使用量及び配列態様、更にはマトリクス樹脂組成
物に対する含浸率を変えることにより、又使用される熱
硬化性マトリクス組成物の配合割合、つまり特性を種々
に変えることにより種々の引張強度、引張弾性率、更に
は靭性を提供する炭素繊維強化プリプレグが作製され
る。次いで、補修箇所に要求される強度、その他の特性
に応じて同じ特性を有した複数枚の炭素繊維強化プリプ
レグが、又は異なる特性を有した複数枚の炭素繊維強化
プリプレグが積層され、150〜200℃にて硬化され、所定
寸法の炭素繊維強化プラスチック板が製造される。The carbon fiber reinforced plastic plate can be manufactured in a usual manner. Briefly, the carbon fiber of continuous fiber is continuously supplied to a continuously fed lower film having a predetermined width. The viscosity is 100000 to 500000 poise, for example, a thermosetting matrix resin composition is supplied to carbon fibers, the carbon fibers are pressure-heated and impregnated using a roll or the like, a predetermined thickness, usually 0.05 to 0.3 mm In the pre-cured and semi-cured state, it is sandwiched by the upper cover film and wound on a winding roll. By changing the physical properties of the carbon fiber used, the amount used and the arrangement mode, as well as the impregnation rate with respect to the matrix resin composition, and by varying the compounding ratio of the thermosetting matrix composition used, that is, the characteristics. Carbon fiber reinforced prepregs are produced that provide various tensile strengths, tensile moduli, as well as toughness. Then, a plurality of carbon fiber reinforced prepregs having the same properties depending on the strength required for the repair location and other properties, or a plurality of carbon fiber reinforced prepregs having different properties are laminated, 150 to 200 Cured at ℃, carbon fiber reinforced plastic plate of a predetermined size is manufactured.

次に、本発明に係る炭素繊維強化プラスチック板を使
用した強化方法を説明する。Next, a reinforcing method using the carbon fiber reinforced plastic plate according to the present invention will be described.

第１図を参照すると、コンクリートスラブ１の下面1a
に接着剤３を介して、或いはプライマー（図示せず）及
び接着剤３を介して炭素繊維強化プラスチック板２を貼
付け、劣化し強度が低下したコンクリートスラブの補強
をなす強化方法が示される。Referring to FIG. 1, the lower surface 1a of the concrete slab 1
A carbon fiber reinforced plastic plate 2 is adhered to the above with an adhesive 3 or with a primer (not shown) and an adhesive 3 to reinforce a concrete slab whose strength has deteriorated and whose strength has decreased.

本発明に従えば、必要に応じては簡単なケレンを行な
い、コンクリートスラブ１の被強化面1aに直接に、或い
は、プライマーを塗布した後に接着剤３が所定の厚さに
て塗布される。通常、接着剤としては炭素繊維強化プラ
スチック板のマトリクス樹脂と馴染み易い接着剤が使用
される。接着剤は、例えばマトリクス樹脂としてエポキ
シ系樹脂が使用された場合にはエポキシ系接着剤等が好
適であり、プライマーとしてはエポキシ系プライマー等
が使用可能である。該接着剤３の厚さは通常２〜5mmと
される。According to the present invention, simple squeegeeing is performed as needed, and the adhesive 3 is applied to the reinforced surface 1a of the concrete slab 1 directly or after applying the primer in a predetermined thickness. Usually, an adhesive that is easily compatible with the matrix resin of the carbon fiber reinforced plastic plate is used as the adhesive. As the adhesive, for example, when an epoxy resin is used as the matrix resin, an epoxy adhesive or the like is suitable, and an epoxy primer or the like can be used as the primer. The thickness of the adhesive 3 is usually 2 to 5 mm.

次に、炭素繊維強化プラスチック板２は、一端側をコ
ンクリートスラブ１に押し当てた後、次いで順次他端側
へと、コンクリートスラブ１の表面1aと炭素繊維強化プ
ラスチック板２の表面との間に空気が挟み込まれること
がないように炭素繊維強化プラスチック板２をコンクリ
ートスラブ１の被強化面1aに押付けながら貼付ける。Next, the carbon fiber reinforced plastic plate 2 is pressed to the concrete slab 1 at one end side and then sequentially to the other end side between the surface 1a of the concrete slab 1 and the surface of the carbon fiber reinforced plastic plate 2. The carbon fiber reinforced plastic plate 2 is attached while being pressed against the reinforced surface 1a of the concrete slab 1 so that air is not trapped.

次いで、コンクリートスラブ表面1aに貼付けられた炭
素繊維強化プラスチック板２は、押圧手段10にて押圧さ
れる。Next, the carbon fiber reinforced plastic plate 2 attached to the concrete slab surface 1a is pressed by the pressing means 10.

本発明に従えば、押圧手段10は、エアーバッグ11と、
該エアーバッグ11に空気を送給するエアー供給手段（図
示せず）と、該エアーバッグ11をプリプレグの方へと押
付けるサポート部材12とを有する。サポート部材12は、
例えば炭素繊維強化プラスチック板の如き剛性の平板12
aと、該平板を所定圧力にて担持する長さ方向に調整自
在とされる通常のサポート12bにて構成するのが好適で
ある。エアーバッグは通常0.02〜0.1kg/cm2の空気圧と
され、圧力調整器13にて制御される。According to the present invention, the pressing means 10 is an airbag 11,
It has an air supply means (not shown) for supplying air to the air bag 11, and a support member 12 for pressing the air bag 11 toward the prepreg. The support member 12 is
A rigid flat plate 12 such as a carbon fiber reinforced plastic plate
It is preferable that it is configured by a and an ordinary support 12b that can adjust the flat plate at a predetermined pressure and can be adjusted in the length direction. The air bag normally has an air pressure of 0.02 to 0.1 kg / cm 2 and is controlled by the pressure regulator 13.

又、必要に応じては、エアーバッグ11内には可撓性の
平面状電気ヒータ等のような加熱手段15を設け、接着剤
３の硬化を促進せしめることも可能である。この場合に
は、図示されるように、エアーバッグ11と平板12aとの
間にアスベストシート等とされる断熱材16を介在させる
のが好適である。Further, if necessary, the air bag 11 may be provided with a heating means 15 such as a flexible flat electric heater to accelerate the curing of the adhesive 3. In this case, as shown in the figure, it is preferable to interpose a heat insulating material 16 such as an asbestos sheet between the airbag 11 and the flat plate 12a.

本発明に従えば、このようなエアーバッグ11を備えた
押圧手段10を使用するために、炭素繊維強化プラスチッ
ク板２が所定の押圧力にて被強化面1aに均等に押付けら
れ、又、被強化面とプリプレグとの間に空気がわずかに
残留していたとしてもこのような空気は該押圧手段10に
より排出されるという効果がある。According to the present invention, in order to use the pressing means 10 provided with such an air bag 11, the carbon fiber reinforced plastic plate 2 is uniformly pressed against the reinforced surface 1a with a predetermined pressing force, and Even if a small amount of air remains between the reinforcing surface and the prepreg, such air is effectively discharged by the pressing means 10.

又、本発明の他の態様に従えば、コンクリートスラブ
１の被強化面1aに対し炭素繊維強化プラスチック板２を
所定距離にて確実に接合するために、被強化面1aと炭素
繊維強化プラスチック板２との間に、第２図で図示する
ように、スペーサ30を設置することができる。スペーサ
30は任意の構造とすることができるが、本実施例では、
コンクリートスラブ面1aに適当な間隔、例えば500mm間
隔にてドライビット31を打込み、該ドライビットにスペ
ーサ螺子32が螺合される。該各スペーサ螺子32はその端
面が概略同一平面内に位置するようにドライビット31に
対して高さ調整が行なわれる。次いで、接着剤３が該ス
ペーサ螺子32の高さよりわずかに厚くなるように塗布さ
れ、その後炭素繊維強化プラスチック板２が押圧手段10
にて被強化面1aの方へと該スペーサ螺子32にて停止され
るまで押圧され、接着剤３が硬化するまでこの状態に保
持される。According to another aspect of the present invention, in order to securely bond the carbon fiber reinforced plastic plate 2 to the reinforced surface 1a of the concrete slab 1 at a predetermined distance, the reinforced surface 1a and the carbon fiber reinforced plastic plate are joined. A spacer 30 can be installed between the two as shown in FIG. Spacer
Although 30 can have any structure, in this embodiment,
The dry bit 31 is driven into the concrete slab surface 1a at an appropriate interval, for example, an interval of 500 mm, and the spacer screw 32 is screwed to the dry bit. The height of each of the spacer screws 32 is adjusted with respect to the dry bit 31 so that the end surfaces of the spacer screws 32 are located substantially in the same plane. Next, the adhesive 3 is applied so as to be slightly thicker than the height of the spacer screw 32, and then the carbon fiber reinforced plastic plate 2 is pressed by the pressing means 10.
Is pressed toward the strengthened surface 1a by the spacer screw 32 until it is stopped, and is held in this state until the adhesive 3 is hardened.

上述したようにスペーサ30は上記構成に限定されるも
のではなく、例えば0.5〜1cmの範囲の高さで種々に準備
された直径２〜3cm程度の円柱状形状物とすることがで
き、予め強化すべき被強化面1aに接着剤等で概略同一平
面を形成するように複数個のスペーサ30を接合して構成
することも可能である。As described above, the spacer 30 is not limited to the above-mentioned configuration, and can be a columnar shaped article having a diameter of 2 to 3 cm that is variously prepared at a height in the range of 0.5 to 1 cm, and is reinforced in advance. It is also possible to bond a plurality of spacers 30 to the surface to be strengthened 1a to be bonded so as to form substantially the same plane with an adhesive or the like.

又、上記実施例では、炭素繊維強化プラスチック板２
が構築物の下面にある被強化面に貼付けられる態様につ
いて説明したが、当然に該被強化面が構築物の上面に存
在している場合にも同様の方法にて強化可能である。In the above embodiment, the carbon fiber reinforced plastic plate 2 is used.
Although the above has described the mode of being attached to the strengthened surface on the lower surface of the structure, it is naturally possible to strengthen by the same method even when the strengthened surface is present on the upper surface of the structure.

発明の効果 以上説明した如く、本発明に係る構築物強化方法は、
エアーバッグを利用して炭素繊維強化プラスチック板を
均等の圧力にて被強化面に押圧することができるので、
極めて作業性が路く、炭素繊維強化プラスチック板を構
築物の被強化面に平らに貼付けることができ、且つ炭素
繊維強化プラスチック板と被強化面との間における空隙
の形成を防止し、十分な補修、補強等の強化効果を達成
することができ、コンクリート構造物の梁、床版、その
他種々の構築物の補強、更には構築物の防水、空気漏れ
防止等と言った構築物の強化を好適に行なうことができ
るという特長を有する。Effects of the Invention As described above, the method for strengthening a construct according to the present invention is
Since it is possible to press the carbon fiber reinforced plastic plate against the reinforced surface with an even pressure using an air bag,
The workability is extremely high, the carbon fiber reinforced plastic plate can be evenly attached to the reinforced surface of the structure, and the formation of voids between the carbon fiber reinforced plastic plate and the reinforced surface is prevented, It is possible to achieve strengthening effects such as repair and reinforcement, and suitably perform reinforcement of beams, floor slabs and other various structures of concrete structures, and further strengthening of structures such as waterproofing of structures and air leakage prevention. It has the feature of being able to.

【図面の簡単な説明】[Brief description of drawings]

第１図は、本発明に係る構築物の強化方法を説明する工
程説明図である。 第２図は、本発明に係る構築物の強化方法の他の実施例
を説明する説明図である。 第３図は、従来の構築物の強化方法を説明する説明図で
ある。 1:コンクリートスラブ 2:炭素繊維強化プラスチック板 3:接着剤 10:押圧手段 11:エアーバッグ 12:サポート部材 30:スペーサFIG. 1 is a process explanatory view illustrating a method for strengthening a construct according to the present invention. FIG. 2 is an explanatory view for explaining another embodiment of the method for strengthening a construct according to the present invention. FIG. 3 is an explanatory diagram illustrating a conventional method for strengthening a structure. 1: Concrete slab 2: Carbon fiber reinforced plastic plate 3: Adhesive 10: Pressing means 11: Air bag 12: Support member 30: Spacer

───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｂ２９Ｌ 31:10 (72)発明者 石川 登 東京都中央区京橋２丁目16番１号 清水 建設株式会社内 (72)発明者 沢出 稔 東京都中央区京橋２丁目16番１号 清水 建設株式会社内─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 6 Identification number Reference number within the agency FI Technical display location B29L 31:10 (72) Inventor Noboru Ishikawa 2-16-1 Kyobashi, Chuo-ku, Tokyo Shimizu Construction Co., Ltd. In-company (72) Minoru Sawade 2-16-1, Kyobashi, Chuo-ku, Tokyo Shimizu Construction Co., Ltd.

Claims (3)

(57)【特許請求の範囲】(57) [Claims] 【請求項１】構築物の被強化面に接着剤を介して炭素繊
維強化プラスチック板を貼付け、次いでエアーバッグを
備えた押圧手段により前記炭素繊維強化プラスチック板
を被強化面の方へと押圧し、構築物被強化面に該炭素繊
維強化プラスチック板を固着することを特徴とする構築
物の強化方法。1. A carbon fiber reinforced plastic plate is attached to a reinforced surface of a structure via an adhesive, and then the carbon fiber reinforced plastic plate is pressed toward the reinforced surface by a pressing means equipped with an air bag, A method for strengthening a structure, comprising fixing the carbon fiber reinforced plastic plate to a surface to be reinforced of the structure. 【請求項２】炭素繊維強化プラスチック板はスペーサに
より構築物被強化面よりの距離が調整されて設置されて
成る特許請求の範囲第１項記載の方法。2. The method according to claim 1, wherein the carbon fiber reinforced plastic plate is installed by adjusting the distance from the reinforced surface of the structure by a spacer. 【請求項３】エアーバッグは加熱手段を内蔵しており、
更に、押圧手段は、該エアーバッグに空気を送給するエ
アー供給手段と、該エアーバッグを炭素繊維強化プラス
チック板の方へと押付けるサポート部材とを有して成る
特許請求の範囲第１項又は第２項記載の方法。3. The air bag has a built-in heating means,
The pressing means further comprises an air supply means for supplying air to the air bag and a support member for pressing the air bag toward the carbon fiber reinforced plastic plate. Alternatively, the method according to item 2.
JP2100288A 1988-01-29 1988-01-29 Method of strengthening structures with carbon fiber reinforced plastic plates Expired - Lifetime JP2545259B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2100288A JP2545259B2 (en) 1988-01-29 1988-01-29 Method of strengthening structures with carbon fiber reinforced plastic plates

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2100288A JP2545259B2 (en) 1988-01-29 1988-01-29 Method of strengthening structures with carbon fiber reinforced plastic plates

Publications (2)

Publication Number Publication Date
JPH01195025A JPH01195025A (en) 1989-08-04
JP2545259B2 true JP2545259B2 (en) 1996-10-16

Family

ID=12042887

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2100288A Expired - Lifetime JP2545259B2 (en) 1988-01-29 1988-01-29 Method of strengthening structures with carbon fiber reinforced plastic plates

Country Status (1)

Country Link
JP (1) JP2545259B2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2856602B2 (en) * 1992-06-22 1999-02-10 飯田建設 株式会社 Deformed pipe lining method

Also Published As

Publication number Publication date
JPH01195025A (en) 1989-08-04

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