JP4072908B2 - Repair method of steel structure - Google Patents
Repair method of steel structure Download PDFInfo
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- JP4072908B2 JP4072908B2 JP2003305564A JP2003305564A JP4072908B2 JP 4072908 B2 JP4072908 B2 JP 4072908B2 JP 2003305564 A JP2003305564 A JP 2003305564A JP 2003305564 A JP2003305564 A JP 2003305564A JP 4072908 B2 JP4072908 B2 JP 4072908B2
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- steel structure
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Description
本発明は、橋梁等の鋼構造物に発生した腐食，亀裂等の補修必要箇所を補修する方法に係る技術分野に属する。 The present invention belongs to a technical field related to a method of repairing a repair-required portion such as corrosion or crack generated in a steel structure such as a bridge.
現在、構造物一般について、自然災害への対処や耐久性の維持のために、補修必要箇所の発見ごとに随時的に小規模で補修を施工することが推奨されている。 Currently, it is recommended that small-scale repairs be performed on a small scale whenever necessary, in order to cope with natural disasters and maintain durability of general structures.
従来、鋼構造物の補修方法としては、例えば、以下に記載のものが知られている。
特許文献１に係る鋼構造物の補修方法は、鋼板を補修必要箇所に溶接で固着するような補修方法に比して、鋼構造物の荷重を増加させることなく、随時的に小規模で補修を施工することができる。 The repair method of the steel structure according to Patent Document 1 is repaired on a small scale as needed without increasing the load of the steel structure as compared with a repair method in which the steel plate is fixed to a repair-needed portion by welding. Can be constructed.
特許文献１に係る鋼構造物の補修方法では、補修必要箇所を含む周囲の全面の塗装を除去し、補修用板をクランプで一定期間保持することで、接着材を有効に機能させることにしているため、施工期間が長期化するという問題点がある。 In the repair method of the steel structure according to Patent Document 1, the adhesive is effectively functioned by removing the coating on the entire surface including the repair required part and holding the repair plate with a clamp for a certain period of time. Therefore, there is a problem that the construction period becomes longer.
本発明は、このような問題点を考慮してなされたもので、施工期間が短縮された鋼構造物の補修方法を提供することを課題とする。 This invention is made in view of such a problem, and makes it a subject to provide the repair method of the steel structure with which the construction period was shortened.
前述の課題を解決するため、本発明に係る鋼構造物の補修方法は、特許請求の範囲の各請求項に記載の手段を採用する。 In order to solve the above-described problems, the steel structure repair method according to the present invention employs means described in each of the claims.
即ち、請求項１では、鋼構造物の表面の部分的に生じた窪んだ補修必要箇所を不陸調整し、前記補修必要箇所を囲むように帯状に鋼構造物の塗装を除去し、この除去した部分にプライマを塗布し、プライマの塗布部分をも被うように前記補修必要箇所に、外縁が前記除去した部分に対応するような形状に設定された炭素繊維シートを被せ、前記プライマが乾いた後、炭素繊維シートの上から常温硬化性の液状の合成樹脂材からなる接着材を塗布する。 That is, in claim 1, a partially repaired portion of the surface of the steel structure that needs to be repaired is adjusted to be uneven, and the coating of the steel structure is removed in a strip shape so as to surround the portion requiring repair. A primer is applied to the applied part, and the repaired part is covered with a carbon fiber sheet whose outer edge is set to correspond to the removed part so as to cover the applied part of the primer , and the primer is dried. After that, an adhesive made of a liquid synthetic resin that is room temperature curable is applied on the carbon fiber sheet.
この手段では、塗布された接着材が炭素繊維シートに含浸されて鋼構造物と炭素繊維シートとを接着一体化させ、更に、プライマが接着材による炭素繊維シートの鋼構造物への接着力を助勢する。 In this means, the carbon fiber sheet is impregnated with the applied adhesive, and the steel structure and the carbon fiber sheet are bonded and integrated . Further, the primer has an adhesive force of the carbon fiber sheet to the steel structure by the adhesive. you assistance.
また、請求項２では、請求項１の鋼構造物の補修方法において、炭素繊維シートは複数枚が積層されることを特徴とする。 According to a second aspect of the present invention, in the method for repairing a steel structure according to the first aspect, a plurality of carbon fiber sheets are laminated.
この手段では、炭素繊維シートが積層体となる。 By this means, the carbon fiber sheet becomes a laminate.
また、請求項４では、請求項１〜３のいずれかの鋼構造物の補修方法において、接着材が塗布された炭素繊維シートの外側に補助シートを被せて鋼構造物に巻付けることを特徴とする。
Moreover, in
この手段では、補助シートが炭素繊維シートを締付ける。 In this means, the auxiliary sheet fastens the carbon fiber sheet.
本発明に係る鋼構造物の補修方法は、塗布された接着材が炭素繊維シートに含浸されて鋼構造物と炭素繊維シートとを接着一体化させ、接着材の硬化の養生期間を確保する必要があるものの、他の特別な工程を必要としないため、施工期間が短縮される効果がある。
また、プライマが接着材による炭素繊維シートの鋼構造物への接着力を助勢するため、炭素繊維シートの接着力が強化される効果がある。
また、プライマが炭素繊維シートを鋼構造物へ接着するため、後続の工程での炭素繊維シートの位置ずれを防止することができる効果がある。
The steel structure repair method according to the present invention requires that the applied adhesive is impregnated into the carbon fiber sheet so that the steel structure and the carbon fiber sheet are bonded and integrated to ensure a curing period for curing the adhesive. However, since no other special process is required, the construction period is shortened.
Moreover, since the primer assists the adhesive force of the carbon fiber sheet to the steel structure by the adhesive, there is an effect that the adhesive force of the carbon fiber sheet is enhanced.
In addition, since the primer adheres the carbon fiber sheet to the steel structure, there is an effect that the displacement of the carbon fiber sheet in the subsequent process can be prevented.
また、請求項２では、炭素繊維シートが積層体となるため、補修必要箇所が多層構造で補修される効果がある。
Moreover, in
また、請求項４では、補助シートが炭素繊維シートを締付けるため、炭素繊維シートが鋼構造物に強固に定着される効果がある。 Further, in the fourth aspect, since the auxiliary sheet fastens the carbon fiber sheet, the carbon fiber sheet has an effect of being firmly fixed to the steel structure.
以下、本発明に係る鋼構造物の補修方法を実施するための最良の形態を図面に基づいて説明する。 Hereinafter, the best mode for carrying out a repair method for a steel structure according to the present invention will be described with reference to the drawings.
この形態では、橋梁の下弦材からなる角筒形の鋼構造物１に生じた孔食からなる補修必要箇所２に適用されるものを示してある。
In this form, what is applied to the repair-
この形態は、図１（Ａ），図２（Ａ）に示すような補修必要箇所２が発見された場合に、図１（Ｂ），図２（Ｂ）以下に示される工程からなる補修が施工される。
In this form, when a repair-
まず、図１（Ｂ），図２（Ｂ）に示すように、補修必要箇所２の不陸調整と、補修必要箇所２の周囲の塗装３（サビ止塗装３ａ，表面塗装３ｂ）の除去とを施工する。これ等の施工については、同時進行が可能である。
First, as shown in FIG. 1 (B) and FIG. 2 (B), the unevenness adjustment of the repair-
補修必要箇所２の不陸調整では、樹脂パテ等を充填して凹みを充填する。必要ならば、樹脂パテ等の充填に先行して、サビの研削が実施される。
In the unevenness adjustment of the repair
補修必要箇所２の周囲の塗装３の除去では、補修必要箇所２を囲むように帯状の除去ライン４を形成する。塗装３の除去により、鋼材５の表面が露出される。
In the removal of the
次ぎに、図１（Ｃ），図２（Ｃ）に示すように、除去ライン４にプライマ６を塗布する。
Next, as shown in FIGS. 1C and 2C, a
次ぎに、図１（Ｄ），図２（Ｄ）に示すように、補修必要箇所２，除去ライン４に炭素繊維シート（ＣＦＲＰ）７が被せられる。
Next, as shown in FIG. 1 (D) and FIG. 2 (D), the carbon fiber sheet (CFRP) 7 is put on the repair required
炭素繊維シート７は、縁辺に除去ライン４が位置する大きさに設定される。また、この炭素繊維シート７については、補修必要箇所２の規模（広さ，深さ等）に応じて、複数枚を積層することも可能である。
The
補修必要箇所２，除去ライン４に被せられた炭素繊維シート７は、除去ライン４に塗布されているプライマ６によって部分的に鋼材５に接着される。従って、後続の工程で炭素繊維シート７が位置ずれを引起こすことがない。
The
次ぎに、図１（Ｅ），図２（Ｅ）に示すように、炭素繊維シート７の上から常温硬化性の液状の合成樹脂材からなる接着材８を塗布する。
Next, as shown in FIGS. 1 (E) and 2 (E), an adhesive 8 made of a liquid synthetic resin material having room temperature curing is applied on the
接着材８としては、例えば、エポキシ樹脂が選択される。接着材８の塗布手段については、特に制約はなく吹付け等をも選択することができる。
For example, an epoxy resin is selected as the
炭素繊維シート７の上から塗布された接着材８は、炭素繊維シート７に含浸されて鋼構造物１と炭素繊維シート７とを接着一体化させる。なお、プライマ６は、接着材８による炭素繊維シート７の鋼構造物１への接着力を助勢する。従って、鋼構造物１と炭素繊維シート７との接着は、極めて強固になる。この結果、鋼構造物１の補修必要箇所２に補強層が積層された格好となる。この補強層は、鋼板ではないため、鋼構造物１の荷重を増加させることにはならない。また、炭素繊維シート７が複数枚積層されている場合には、炭素繊維シート７が積層体となって補強層が多層構造になる。
The
次ぎに、図１（Ｆ），図２（Ｆ）に示すように、炭素繊維シート７の外側に補助シート９を被せて鋼構造物１に巻付ける。
Next, as shown in FIG. 1 (F) and FIG. 2 (F), the
補助シート９としては、例えば、アラミド繊維シートが選択される。補助シート９の巻付けは、炭素繊維シート７に塗布された接着材８の硬化養生の後に行ってもよいが、接着材８の硬化養生の前に行うこともできる。接着材８の硬化養生の前に行った場合、補助シート９にも接着材８が含浸され、前述の補強層がさらに積層された格好となる。なお、接着材８の硬化養生の前でも、プライマ６の接着で炭素繊維シート７が位置ずれを引起こすことはない。
For example, an aramid fiber sheet is selected as the
炭素繊維シート７の外側へ巻付けられた補助シート９は、炭素繊維シート７を締付けて、炭素繊維シート７を鋼構造物１に強固に定着させる。
The
この後、必要に応じて、補助シート９が塗装される。
Thereafter, the
この形態によると、補修必要箇所２を含む周囲の全面の塗装３を除去したりクランプで一定期間保持したりすることが不要になるため、施工期間が長期化することはない。
According to this embodiment, it is not necessary to remove the
以上、図示した形態の外に、補修必要箇所２の不陸調整について、炭素繊維シート７を小さく切断したものを積層しておき、塗布された接着材８の含浸で自然に補修必要箇所２が充填されるようにすることも可能である。
As described above, in addition to the illustrated form, the non-landscape adjustment of the repair-
さらに、補助シート９を不要にすることも可能である。
Furthermore, the
本発明に係る鋼構造物の補修方法は、橋梁以外の鋼で製造された構造物一般に適用が可能である。 The method for repairing a steel structure according to the present invention can be applied to general structures manufactured of steel other than bridges.
１ 鋼構造物
２ 補修必要箇所
３ 塗装
４ 除去ライン
５ 鋼材
６ プライマ
７ 炭素繊維シート
８ 接着材
９ 補助シート
DESCRIPTION OF SYMBOLS 1
Claims (3)
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| Application Number | Priority Date | Filing Date | Title |
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| JP2003305564A JP4072908B2 (en) | 2003-08-28 | 2003-08-28 | Repair method of steel structure |
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| JP2003305564A JP4072908B2 (en) | 2003-08-28 | 2003-08-28 | Repair method of steel structure |
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| JP2005076230A JP2005076230A (en) | 2005-03-24 |
| JP4072908B2 true JP4072908B2 (en) | 2008-04-09 |
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| JP2003305564A Expired - Fee Related JP4072908B2 (en) | 2003-08-28 | 2003-08-28 | Repair method of steel structure |
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4857032B2 (en) * | 2006-06-15 | 2012-01-18 | 川崎重工業株式会社 | Steel structure reinforcing method and reinforcing structure |
| JP5302973B2 (en) * | 2009-03-30 | 2013-10-02 | 川崎重工業株式会社 | Railway vehicle structure and manufacturing method thereof |
| EP2441640A4 (en) * | 2009-06-10 | 2013-09-04 | Kawasaki Heavy Ind Ltd | Method for reinforcing structure for railway rolling stock and structure for railway rolling stock |
| JP6227989B2 (en) * | 2012-12-13 | 2017-11-08 | 国立大学法人豊橋技術科学大学 | Steel repair structure and repair method |
| JP2014227743A (en) * | 2013-05-23 | 2014-12-08 | 国立大学法人豊橋技術科学大学 | Repair structure of steel material |
| JP2015112659A (en) * | 2013-12-10 | 2015-06-22 | 新日鐵住金株式会社 | Repairing method for fatigue crack formed in steel girder |
| JP6473596B2 (en) * | 2014-10-15 | 2019-02-20 | 学校法人鶴学園 | Steel structure reinforcement structure |
| JP6923873B2 (en) * | 2016-12-12 | 2021-08-25 | 日本製鉄株式会社 | Reinforcement method and reinforcement structure |
| JP7201464B2 (en) * | 2019-02-01 | 2023-01-10 | 日鉄ケミカル＆マテリアル株式会社 | Steel structure repair method |
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