JPH09228552A - Method of reinforcing structure by conductive reinforced fiber sheet - Google Patents
Method of reinforcing structure by conductive reinforced fiber sheetInfo
- Publication number
- JPH09228552A JPH09228552A JP3680396A JP3680396A JPH09228552A JP H09228552 A JPH09228552 A JP H09228552A JP 3680396 A JP3680396 A JP 3680396A JP 3680396 A JP3680396 A JP 3680396A JP H09228552 A JPH09228552 A JP H09228552A
- Authority
- JP
- Japan
- Prior art keywords
- sheet
- fiber sheet
- reinforcing fiber
- conductive reinforcing
- conductive
- 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.)
- Granted
Links
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- Reinforcement Elements For Buildings (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、導電性強化繊維シ
ートによる柱、梁、スラブ、壁、煙突、トンネル等の構
造物の補強及び補修方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for reinforcing and repairing a structure such as a pillar, a beam, a slab, a wall, a chimney, a tunnel, etc., using a conductive reinforcing fiber sheet.
【０００２】[0002]
【従来の技術】従来、柱、梁、スラブ、壁、煙突、トン
ネル等の構造物の建築、補修等において、これらの構造
物に十分な強度を持たせるための補強・補修方法とし
て、補強部分等に鉄板等を貼着する方法が行なわれてい
る。しかし、鉄道構造物（トンネル壁、柱）、地下鉄構
造物（天井、壁、柱）、送電地下路構造物（壁、天井）
及び電柱等の電気工作物を有する構造物の場合には、導
電性を有する鉄板等を使用すると、絶縁性が不充分とな
り、これに伴う問題が生じている。また、鉄板等を用い
る場合、重量が重く柔軟性がなく、且つ加工が困難であ
るため作業性が悪いという問題もある。2. Description of the Related Art Conventionally, in the construction and repair of structures such as columns, beams, slabs, walls, chimneys, tunnels, etc., a reinforcement part has been used as a reinforcement / repair method for giving these structures sufficient strength. There is a method of attaching an iron plate or the like to the etc. However, railway structures (tunnel walls, pillars), subway structures (ceilings, walls, pillars), power transmission underground structures (walls, ceilings)
In the case of a structure having an electric work such as an electric pole, if an electrically conductive iron plate or the like is used, the insulating property becomes insufficient, which causes a problem. Further, when an iron plate or the like is used, there is a problem that the workability is poor because it is heavy and inflexible and difficult to process.
【０００３】[0003]
【発明が解決しようとする課題】本発明の目的は、前記
問題点を解決し、絶縁性を有し、作業性が良く且つ効果
的な導電性強化繊維シートによる構造物の補強方法を提
供することにある。SUMMARY OF THE INVENTION An object of the present invention is to solve the above problems and to provide a method for reinforcing a structure with a conductive reinforcing fiber sheet having an insulating property, good workability and effective. Especially.
【０００４】[0004]
【課題を解決するための手段】本発明によれば、導電性
強化繊維シートを構造物の表面に設けて該構造物を補強
するにあたり、該導電性強化繊維シートの上下少なくと
も一方の表面に絶縁材料シートを設けることを特徴とす
る導電性強化シートによる構造物の補強方法が提供され
る。According to the present invention, when a conductive reinforcing fiber sheet is provided on the surface of a structure to reinforce the structure, insulation is provided on at least one of the upper and lower surfaces of the conductive reinforcing fiber sheet. There is provided a method for reinforcing a structure with a conductive reinforcing sheet, which comprises providing a material sheet.
【０００５】[0005]
【発明の実施の形態】本発明の補強方法で用いる導電性
強化繊維シートとしては、経糸及び緯糸の一方が導電性
強化繊維を含む強化繊維、他方が熱可塑性樹脂含有繊維
からなり、該経糸と該緯糸とが前記熱可塑性樹脂含有繊
維中の熱可塑性樹脂により固着されたもの等を使用する
ことができる。BEST MODE FOR CARRYING OUT THE INVENTION As the conductive reinforcing fiber sheet used in the reinforcing method of the present invention, one of the warp yarn and the weft yarn is a reinforcing fiber containing the conductive reinforcing fiber, and the other is a thermoplastic resin-containing fiber. It is possible to use one in which the weft yarn is fixed by the thermoplastic resin in the thermoplastic resin-containing fiber.
【０００６】前記導電性強化繊維としては、炭素繊維、
導電性セラミック繊維、炭化珪素繊維等を用いることが
できるが、軽量で且つ耐食性があることから、炭素繊維
が好ましい。導電性強化繊維シートを構成する強化繊維
は、導電性強化繊維を含み、シート全体が導電性を示す
用にしたものであれば、例えばガラス繊維、アラミド繊
維等の非導電性繊維を含んでいても良い。As the conductive reinforcing fiber, carbon fiber,
Conductive ceramic fibers, silicon carbide fibers and the like can be used, but carbon fibers are preferable because they are lightweight and have corrosion resistance. The reinforcing fibers constituting the conductive reinforcing fiber sheet include conductive reinforcing fibers, and if the whole sheet is made to show conductivity, for example, glass fibers, non-conductive fibers such as aramid fibers are included. Is also good.
【０００７】前記導電性強化繊維を含む強化繊維は、通
常１０００〜１０００００本、好ましくは１０００〜２
００００本のフィラメントから構成することができる。
これらのフィラメントは、通常０．１〜２０回／ｍ、好
ましくは０．１〜５回／ｍの撚りをかけて導電性強化繊
維を含む強化繊維とすることができる。このように僅か
な撚りをかけて用いることにより、前記導電性強化繊維
を含む強化繊維と前記熱可塑性樹脂含有繊維との固着の
際、前記熱可塑性樹脂含有繊維が前記導電性強化繊維を
含む強化繊維に面接触し、好ましい導電性強化繊維シー
トとすることができる。The reinforcing fibers including the conductive reinforcing fibers are usually 1000 to 100000, preferably 1000 to 2.
It can be composed of 0000 filaments.
These filaments can be twisted normally 0.1 to 20 times / m, preferably 0.1 to 5 times / m to form reinforcing fibers including conductive reinforcing fibers. By using with a slight twist in this manner, when the reinforcing fiber containing the conductive reinforcing fiber and the thermoplastic resin-containing fiber are fixed, the thermoplastic resin containing fiber is reinforced containing the conductive reinforcing fiber. It is in surface contact with the fibers and can be a preferred conductive reinforcing fiber sheet.
【０００８】なお、前記導電性強化繊維を含む強化繊維
は、後述する貼着工程におけるマトリックス樹脂の含浸
性を良好とするため、後に詳述する熱可塑性樹脂含有繊
維とは異なり、樹脂を含んでいないことが好ましい。The reinforcing fiber containing the conductive reinforcing fiber contains a resin, unlike the thermoplastic resin-containing fiber which will be described in detail later, in order to improve the impregnation property of the matrix resin in the attaching step described later. Preferably not.
【０００９】前記導電性強化繊維を含む強化繊維は、引
張弾性率が通常１５０〜１０００ＧＰａ、好ましくは２
００〜１０００ＧＰａ、引張強度が通常２〜１０ＧＰ
ａ、好ましくは３．５〜１０ＧＰａ、破断伸度が通常１
〜１０％、好ましくは１．５〜１０％であることが望ま
しい。The tensile strength of the reinforcing fiber including the conductive reinforcing fiber is usually 150 to 1000 GPa, preferably 2
00-1000 GPa, tensile strength is usually 2-10 GP
a, preferably 3.5 to 10 GPa, the elongation at break is usually 1
It is desirable to be 10%, preferably 1.5% to 10%.
【００１０】前記熱可塑性樹脂含有繊維としては、熱可
塑性樹脂を含有する限り特に限定されないが、ガラス繊
維、アラミド繊維等に熱可塑性樹脂を含浸又は塗布する
か、あるいはガラス繊維、アラミド繊維等に熱可塑性樹
脂の繊維を混繊又は付着させたもの等を使用することが
できる。The thermoplastic resin-containing fiber is not particularly limited as long as it contains a thermoplastic resin, but it may be prepared by impregnating or coating glass fiber, aramid fiber or the like with the thermoplastic resin, or by heating glass fiber, aramid fiber or the like with heat. It is possible to use, for example, fibers in which fibers of a plastic resin are mixed or attached.
【００１１】前記熱可塑性樹脂としては、エチレン−酢
酸ビニル共重合体、ポリプロピレン等を用いることがで
きる。As the thermoplastic resin, ethylene-vinyl acetate copolymer, polypropylene or the like can be used.
【００１２】前記熱可塑性樹脂含有繊維は、通常１０〜
１００００本、好ましくは１００〜１０００本のフィラ
メントから構成することができる。The thermoplastic resin-containing fiber is usually 10 to
It can be composed of 10,000 filaments, preferably 100-1000 filaments.
【００１３】前記導電性強化繊維シートにおいて、前記
経糸と緯糸との織り方は特に限定されないが、平織り、
綾織り、朱子織り等の織り方で織ったものを使用するこ
とができる。緯糸と経糸とは、通常９０°で交差するも
のを使用するが、９０°以外で交差したものを使用する
こともできる。In the conductive reinforcing fiber sheet, the weave of the warp and the weft is not particularly limited, but a plain weave,
A twill weave, a satin weave and the like can be used. The weft yarn and the warp yarn are usually those intersecting at 90 °, but those intersecting at other than 90 ° can also be used.
【００１４】前記導電性強化繊維を含む強化繊維及び熱
可塑性樹脂含有繊維の配置間隔は、特に限定されない
が、該強化繊維を保持すること、後述するマトリックス
樹脂の含浸性をよくすること、該強化繊維方向を選択的
に強化すること等の観点から、導電性強化繊維を含む強
化繊維の間隔が好ましくは０〜１０ｍｍおき、さらに好
ましくは０〜５ｍｍおきと密であり、かつ前記熱可塑性
樹脂含有繊維が好ましくは１０〜５００ｍｍおき、さら
に好ましくは１０〜２００ｍｍと疎であることが望まし
い。The spacing between the reinforcing fibers containing the conductive reinforcing fibers and the thermoplastic resin-containing fibers is not particularly limited, but the reinforcing fibers are held, the impregnating ability of the matrix resin described later is improved, From the viewpoint of selectively reinforcing the fiber direction, etc., the distance between the reinforcing fibers including the conductive reinforcing fibers is preferably 0 to 10 mm, more preferably 0 to 5 mm, and the thermoplastic resin is contained. It is desirable that the fibers are sparse, preferably every 10 to 500 mm, more preferably 10 to 200 mm.
【００１５】前記経糸と緯糸との固着方法は、熱可塑性
樹脂含有繊維中の熱可塑性樹脂による固着であれば特に
限定されず、ホットメルト接着等の通常の方法を用いる
ことができる。また、固着するとは、前記熱可塑性樹脂
の少なくとも一部が溶融し、前記導電性強化繊維を含む
強化繊維に付着又は含浸した後硬化し、経糸と緯糸とが
接触又は固定された状態をいう。The method of fixing the warp and the weft is not particularly limited as long as it is fixed by the thermoplastic resin in the thermoplastic resin-containing fiber, and a usual method such as hot melt adhesion can be used. Further, “fixed” means a state in which at least a part of the thermoplastic resin is melted and adhered or impregnated into the reinforcing fibers including the conductive reinforcing fibers and then cured, and the warp and the weft are in contact with or fixed to each other.
【００１６】前記導電性強化繊維シートの設計厚さは通
常０．０５〜５ｍｍ、好ましくは０．１〜０．５ｍｍで
あることが望ましい。また、導電性強化繊維シートの寸
法は特に限定されず強化対象の構造物に応じて決定され
るが、通常幅１０〜１００ｃｍ、長さ１〜５００ｍのも
のを用いることができる。導電性強化繊維シートの繊維
目付は通常１００〜１０００ｇ／ｍ2、好ましくは２０
０〜１０００ｇ／ｍ2のものを用いることができる。The designed thickness of the electrically conductive reinforcing fiber sheet is usually 0.05 to 5 mm, preferably 0.1 to 0.5 mm. The size of the conductive reinforcing fiber sheet is not particularly limited and is determined according to the structure to be reinforced, but a sheet having a width of 10 to 100 cm and a length of 1 to 500 m can be used. The fiber basis weight of the conductive reinforcing fiber sheet is usually 100 to 1000 g / m 2 , preferably 20.
The thing of 0-1000g / m < 2 > can be used.
【００１７】本発明の補強方法で用いる絶縁材料シート
は、絶縁材料で構成されたシート状物であれば良く、通
常抵抗率１０9〜１０20Ωｃｍを示すものが好ましい。
絶縁材料シートの設計厚みは、通常０．００５〜３０ｍ
ｍ、好ましくは０．０２〜１．０ｍｍが望ましい。The insulating material sheet used in the reinforcing method of the present invention may be a sheet-like material made of an insulating material, and preferably has a resistivity of 10 9 to 10 20 Ωcm.
The design thickness of the insulating material sheet is usually 0.005 to 30 m
m, preferably 0.02-1.0 mm.
【００１８】前記絶縁材料シートを構成する絶縁材料と
しては、ガラス繊維や有機繊維等が使用できる。具体的
にはポリエチレン繊維、ガラス繊維、アルミナ繊維、ポ
リアミド繊維、ポリエステル繊維、ポリプロピレン繊
維、ポリ塩化ビニリデン繊維、ポリ塩化ビニル繊維等が
好ましい。該絶縁繊維は、織物、フェルト、短繊維、一
方向材として使用でき、織物、一方向材が良い。As the insulating material forming the insulating material sheet, glass fiber, organic fiber or the like can be used. Specifically, polyethylene fibers, glass fibers, alumina fibers, polyamide fibers, polyester fibers, polypropylene fibers, polyvinylidene chloride fibers, polyvinyl chloride fibers and the like are preferable. The insulating fiber can be used as a woven fabric, a felt, a short fiber or a unidirectional material, and a woven fabric or a unidirectional material is preferable.
【００１９】前記絶縁材料シートを絶縁繊維で構成する
場合の目付は、１０〜２５００ｇ／ｍ2として用いるこ
とができる。この際の織り方は平織、綾織、朱子織等が
用いられる。When the insulating material sheet is made of insulating fibers, the basis weight can be 10 to 2500 g / m 2 . In this case, a plain weave, a twill weave, a satin weave, or the like is used as the weaving method.
【００２０】本発明の補強方法では、鉄道構造物（トン
ネル壁、柱）、地下鉄構造物（天井、壁、柱）、送電地
下路構造物（壁、天井）、電柱等の電気工作物を有する
構造物をはじめとし、種々の柱、梁、スラブ、壁、煙
突、トンネル等の構造物の表面に、前記導電性強化繊維
シートを設けるにあたり、導電性強化繊維シートの上下
少なくとも一方の表面に前記絶縁材料シートを設けるこ
とにより実施できる。導電性強化繊維シートの上下少な
くとも一方の表面に前記絶縁材料シートを設けるとは、
導電性強化繊維シートの下表面に絶縁材料シートを設け
る場合、導電性強化繊維シートの上表面に絶縁材料シー
トを設ける場合、導電性強化繊維シートの上下両方の表
面に絶縁材料表面を設ける場合がある。この際、例えば
導電性強化繊維シートが複数層の場合には、導電性強化
繊維シートと絶縁材料シートとを交互に配置しても良
く、また本発明の目的を達成できれば、少なくとも１つ
の導電性強化繊維シートの上下少なくとも一方の表面に
絶縁材料シートを設ければ良い。尚、導電性強化繊維シ
ートを完全に絶縁する場合には、全体を絶縁材料シート
で覆うように配置するのが好ましいが、必ずしもこれに
限定されるものではなく、絶縁を必要とする箇所の表面
部分に設けることができる。本発明において、表面に設
けるとは、表面に直接であっても、また後述する中塗層
や上塗り層を介して間接的に設けることも含む意味であ
る。The reinforcing method of the present invention includes electric structures such as railway structures (tunnel walls, pillars), subway structures (ceilings, walls, pillars), power transmission underground passage structures (walls, ceilings), and electric poles. Including the structure, on the surface of various pillars, beams, slabs, walls, chimneys, structures such as tunnels, in providing the conductive reinforcing fiber sheet, at least one surface above and below the conductive reinforcing fiber sheet, This can be done by providing a sheet of insulating material. Providing the insulating material sheet on at least one of the upper and lower surfaces of the conductive reinforcing fiber sheet,
When providing an insulating material sheet on the lower surface of the conductive reinforcing fiber sheet, when providing an insulating material sheet on the upper surface of the conductive reinforcing fiber sheet, or when providing an insulating material surface on both the upper and lower surfaces of the conductive reinforcing fiber sheet. is there. At this time, for example, when the conductive reinforcing fiber sheet has a plurality of layers, the conductive reinforcing fiber sheet and the insulating material sheet may be arranged alternately, and if the object of the present invention can be achieved, at least one conductive An insulating material sheet may be provided on at least one of the upper and lower surfaces of the reinforcing fiber sheet. When the conductive reinforcing fiber sheet is completely insulated, it is preferable to dispose the conductive reinforcing fiber sheet so that the whole is covered with an insulating material sheet, but the invention is not necessarily limited to this, and the surface of the portion requiring insulation is not limited to this. It can be provided in a part. In the present invention, providing on the surface means to be provided directly on the surface or indirectly provided via an intermediate coating layer or a top coating layer described later.
【００２１】本発明の補強方法の具体的な施工方法とし
ては、例えば図１に示される、コンクリート等の構造物
表面１１にプライマー層１２、下塗り層１３を形成した
後、導電性強化繊維シート１４を貼着し、さらにその上
に中塗り層１５を形成し、絶縁材料シート１６を貼着
し、更に上塗り層１７、保護層１８を形成する施工方法
等を挙げることができる。以下、この施工例に基づいて
更に詳細に説明する。As a concrete construction method of the reinforcing method of the present invention, for example, as shown in FIG. 1, after forming a primer layer 12 and an undercoat layer 13 on a surface 11 of a structure such as concrete, a conductive reinforcing fiber sheet 14 is formed. And the like, the intermediate coating layer 15 is further formed thereon, the insulating material sheet 16 is attached, and the top coating layer 17 and the protective layer 18 are further formed. Hereinafter, it demonstrates still in detail based on this construction example.
【００２２】まず、構造物表面１１の洗浄、研磨処理、
及び下地調整材を用いた段差、欠損部位１９等の前処理
を行う。前記洗浄方法としては、ディスクサンダー、サ
ンドブラスト、高圧洗浄、ウエス、有機溶剤等で取り除
く方法等を用いることができる。前記下地調整材として
は、コンクリート強度と同等以上の圧縮強度を有する樹
脂、例えばパテ状エポキシ樹脂、エポキシ樹脂モルタル
等を用いることができる。また、前記前処理工程におい
て、出隅、入隅のＲ仕上げを併せて施すことが好まし
い。First, the structure surface 11 is cleaned, polished, and
Further, pretreatment of the step, the defective portion 19 and the like is performed by using the base adjusting material. As the cleaning method, a method such as disk sander, sand blasting, high pressure cleaning, a method of removing with a waste cloth, an organic solvent or the like can be used. As the base conditioner, a resin having a compressive strength equal to or higher than concrete strength, such as putty-like epoxy resin or epoxy resin mortar, can be used. In addition, in the pretreatment step, it is preferable to perform R finish of the projected corner and the projected corner together.
【００２３】前処理終了後、導電性強化繊維シート１４
の貼着位置の墨出しを行う。次に、構造物表面１１にロ
ーラー刷毛等でプライマーを塗布し、プライマー層１２
を形成する工程を行う。前記プライマーとしては、構造
物表面１１及び下塗り層１３との接着性が良好なもの、
例えば溶剤型エポキシ樹脂あるいは無溶剤型エポキシ樹
脂等を使用することができる。After completion of the pretreatment, the conductive reinforcing fiber sheet 14
Mark out the attachment position of. Next, a primer is applied to the structure surface 11 with a roller brush or the like, and the primer layer 12
Is performed. The primer has good adhesion to the structure surface 11 and the undercoat layer 13,
For example, a solvent type epoxy resin or a solventless type epoxy resin can be used.
【００２４】前記プライマーの乾燥時間は、２０℃にお
いて通常１〜２０時間、好ましくは１〜１５時間である
ことが望ましい。また、前記プライマーの混合粘度は、
２０℃において通常１〜２０００ｃｐｓ、好ましくは１
０〜１０００ｃｐｓであることが、作業性の点で好まし
い。また、プライマーの使用温度は、通常−１０℃〜５
０℃であることが好ましい。プライマーの塗布量は、通
常０．０１〜２ｋｇ／ｍ2、好ましくは０．１〜０．５
ｋｇ／ｍ2であることが望ましい。It is desirable that the primer is dried at 20 ° C. for usually 1 to 20 hours, preferably 1 to 15 hours. The mixed viscosity of the primer is
1 to 2000 cps at 20 ° C., preferably 1
The workability is preferably 0 to 1000 cps. In addition, the use temperature of the primer is usually -10 ° C to 5
It is preferably 0 ° C. The primer coating amount is usually 0.01 to 2 kg / m 2 , preferably 0.1 to 0.5.
It is preferably kg / m 2 .
【００２５】次に、プライマー層１２上に、下塗り層１
３としてのマトリックス樹脂等を塗布する工程を行う。Next, the undercoat layer 1 is formed on the primer layer 12.
A step of applying a matrix resin or the like as No. 3 is performed.
【００２６】前記マトリックス樹脂としては、熱硬化性
樹脂、常温硬化性樹脂等を使用することができるが、作
業性の点で常温硬化性樹脂が好ましい。As the matrix resin, a thermosetting resin, a room temperature curable resin or the like can be used, but a room temperature curable resin is preferable from the viewpoint of workability.
【００２７】前記常温硬化性樹脂としては、２０℃にお
ける硬化時間が好ましくは３０分間〜５時間、さらに好
ましくは３０分間〜３時間のものが作業性の点で望まし
い。The room temperature curable resin preferably has a curing time at 20 ° C. of preferably 30 minutes to 5 hours, more preferably 30 minutes to 3 hours from the viewpoint of workability.
【００２８】前記マトリックス樹脂の設計強度発現時間
は２０℃において通常１〜２０日、好ましくは１〜７日
であることが望ましい。また、粘度は２０℃において通
常１０〜３００００ｃｐｓ、好ましくは１００〜２００
００ｃｐｓであることが、含浸性及び脱泡性がよいため
望ましい。The design strength development time of the matrix resin at 20 ° C. is usually 1 to 20 days, preferably 1 to 7 days. The viscosity at 20 ° C. is usually 10 to 30,000 cps, preferably 100 to 200.
00 cps is desirable because it has good impregnation property and defoaming property.
【００２９】前記下塗り層１３を塗布する工程は、前記
マトリックス樹脂をローラー刷毛やゴムベラ等で通常
０．０１〜２ｋｇ／ｍ2、好ましくは０．１〜１ｋｇ／
ｍ2を均一に塗布することにより行うことができる。In the step of applying the undercoat layer 13, the matrix resin is usually applied to a roller brush or a rubber spatula in an amount of 0.01 to 2 kg / m 2 , preferably 0.1 to 1 kg / m 2 .
It can be performed by uniformly applying m 2 .
【００３０】次に、下塗り層１３上に、導電性強化繊維
シート１４を貼着する工程を行う。本工程は、下塗り層
１３の塗布直後に導電性強化繊維シート１４を前記墨出
し位置に沿って貼着し、好ましくはシート１４の表面を
導電性強化繊維方向に、さらに好ましくはシート１４の
中心部から端部に導電性強化繊維方向に沿ってゴムベラ
等でしごき、マトリックス樹脂を導電性強化繊維の中に
含浸させ、且つ導電性強化繊維中の空気を追い出し平滑
に仕上げることにより行うことができる。Next, the step of sticking the conductive reinforcing fiber sheet 14 on the undercoat layer 13 is performed. In this step, immediately after applying the undercoat layer 13, the conductive reinforcing fiber sheet 14 is attached along the marking-out position, preferably the surface of the sheet 14 in the conductive reinforcing fiber direction, more preferably the center of the sheet 14. Can be performed by squeezing the conductive reinforcing fibers from the part to the end along the direction of the conductive reinforcing fibers with a rubber spatula, impregnating the matrix resin into the conductive reinforcing fibers, and expelling the air in the conductive reinforcing fibers to make the surface smooth. .
【００３１】前記貼着工程の際、シートの長さが長すぎ
ると作業が困難であるため、導電性強化繊維シート１４
を適度の長さに切断し、継ぎ重ねて貼着することができ
る。この場合、強度を確保するために、継ぎ重ね部分は
長手方向（導電性強化繊維方向）に１００ｍｍ以上重な
るよう貼着することが好ましい。横手方向の継ぎ重ね
は、強度の確保の観点からは必要ない。In the attaching step, if the length of the sheet is too long, it is difficult to perform the work.
Can be cut to an appropriate length, and can be spliced and pasted together. In this case, in order to secure the strength, it is preferable that the jointed portions are attached so as to overlap each other by 100 mm or more in the longitudinal direction (the conductive reinforcing fiber direction). The transverse joining is not necessary from the viewpoint of ensuring strength.
【００３２】次に、導電性強化繊維シート１４上に、中
塗り層１５としてのマトリックス樹脂等を塗布する工程
を行う。本工程は、前記下塗り工程で使用したものと同
様のマトリックス樹脂を用い、同様な条件等で行うこと
ができる。この中塗り層１５上に、絶縁材料シート１６
を、前記導電性強化繊維シート１４と同様に貼着した
後、上塗り層１７としてのマトリックス樹脂等を塗布す
る工程を下塗り層１３と同様に行う。Next, a step of applying a matrix resin or the like as the intermediate coating layer 15 on the conductive reinforcing fiber sheet 14 is performed. This step can be performed under the same conditions and the like using the same matrix resin as that used in the undercoating step. An insulating material sheet 16 is formed on the intermediate coating layer 15.
Is attached in the same manner as the conductive reinforcing fiber sheet 14, and then the step of applying a matrix resin or the like as the overcoat layer 17 is performed similarly to the undercoat layer 13.
【００３３】最後に、仕上げ工程を行う。本工程は、上
塗り層１７上に、ウレタン樹脂あるいはフッ素樹脂等の
耐候性塗料を塗布し保護層１８を形成することによって
行うことができる。Finally, a finishing process is performed. This step can be performed by applying a weather resistant coating such as urethane resin or fluororesin on the overcoat layer 17 to form the protective layer 18.
【００３４】前記各工程において、繊維の膨れ、皺、よ
れ等が発生したら直ちに修正することが好ましい。ま
た、汚れの付着、降雨等からの保護を十分に行うことが
好ましい。In each of the above steps, it is preferable to immediately correct any swelling, wrinkles, twists, etc. of the fibers. In addition, it is preferable to sufficiently protect from adhesion of dirt and rainfall.
【００３５】以上において説明した施工例では、１層の
導電性強化繊維シートのみを設けたが、本発明の補強方
法では、２層以上の導電性強化繊維シートを設けること
もできる。２層以上の導電性強化繊維シートは、前記下
塗り工程、導電性強化繊維シートの貼着工程、及び上塗
り工程を必要な回数だけ繰り返すことにより設けること
ができ、またこれに合わせて絶縁材料シートを前述のと
おり設けることができる。In the construction examples described above, only one layer of conductive reinforcing fiber sheet is provided, but in the reinforcing method of the present invention, two or more layers of conductive reinforcing fiber sheet can be provided. The conductive reinforcing fiber sheet having two or more layers can be provided by repeating the undercoating step, the step of attaching the conductive reinforcing fiber sheet, and the overcoating step as many times as necessary, and in accordance with this, an insulating material sheet can be provided. It can be provided as described above.
【００３６】[0036]
【発明の効果】本発明の補強方法は、導電性強化繊維シ
ートと、絶縁材料シートとを構造物の表面に設ける補強
方法であるので、鉄道構造物（トンネル壁、柱）、地下
鉄構造物（天井、壁、柱）、送電地下路構造物（壁、天
井）、電柱等の電気工作物を有する構造物をはじめと
し、種々の柱、梁、スラブ、壁、煙突、トンネル等の構
造物の補強、補修等を高い作業性で効果的に行うことが
でき、しかも必要箇所に絶縁性を付与することができ
る。Since the reinforcing method of the present invention is a reinforcing method in which a conductive reinforcing fiber sheet and an insulating material sheet are provided on the surface of a structure, a railway structure (tunnel wall, pillar), subway structure ( Ceilings, walls, pillars), power transmission underground passage structures (walls, ceilings), structures having electric work such as utility poles, and various pillars, beams, slabs, walls, chimneys, tunnels, and other structures Reinforcement, repair, etc. can be effectively performed with high workability, and moreover, insulation can be imparted to a necessary portion.
【００３７】[0037]
【実施例】以下、図２を参照して本発明の補強方法を詳
細に説明するが、本発明はこれらに限定されるものでは
ない。EXAMPLES The reinforcing method of the present invention will be described in detail below with reference to FIG. 2, but the present invention is not limited thereto.
【００３８】図２において２０は、本発明の補強方法を
施した高架橋である。高架橋２０は、舗装部２１、鉄筋
コンクリート製のＲＣ床版２２、及び橋脚２３を持つ構
造物であって、床版２２下面が導電性強化繊維シート１
４及び絶縁材料シート１６を設けた層により補強されて
いる。In FIG. 2, reference numeral 20 denotes a high bridge subjected to the reinforcing method of the present invention. The viaduct 20 is a structure having a pavement portion 21, an RC floor slab 22 made of reinforced concrete, and a bridge pier 23, and the bottom surface of the floor slab 22 is a conductive reinforcing fiber sheet 1.
4 and the layer provided with the insulating material sheet 16 are reinforced.
【００３９】この補強は、まず、床版２２下面のコンク
リート表面をディスクサンダーにより処理し、コンクリ
ート表面の汚れを取り除いた。For this reinforcement, first, the concrete surface on the lower surface of the floor slab 22 was treated with a disk sander to remove stains on the concrete surface.
【００４０】次に、型枠の段差やコンクリートの欠損に
よる表面の凹凸を、コンクリートと同等以上の強度を有
するパテ状エポキシ樹脂を塗布又は充填し、表面が平滑
になるように仕上げた。Next, the unevenness of the surface due to the steps of the mold and the loss of concrete was applied or filled with a putty-like epoxy resin having a strength equal to or higher than that of concrete, and the surface was finished to be smooth.
【００４１】パテ状エポキシ樹脂が硬化した後、導電性
強化繊維シート接着位置の墨出しを行った。After the putty-like epoxy resin was cured, the conductive reinforcing fiber sheet adhesion position was marked out.
【００４２】次に導電性強化繊維シート接着位置のコン
クリート面に、ローラー刷毛等で２０℃における粘度６
００ｃｐｓのプライマーを０．３ｋｇ／ｍ2の塗布量で
均一に塗布した。Next, a viscosity of 6 at 20 ° C. with a roller brush is applied to the concrete surface where the conductive reinforcing fiber sheet is bonded.
A 00 cps primer was uniformly applied at an application amount of 0.3 kg / m 2 .
【００４３】次に導電性強化繊維シート接着位置に２０
℃における可使時間１２０分、２０℃における粘度６０
００ｃｐｓのエポキシ樹脂をローラー刷毛で塗布量０．
６ｋｇ／ｍ2となるように均一に塗布して下塗り処理を
した。Next, the conductive reinforcing fiber sheet is attached at the bonding position of 20.
Pot life at 120 ° C for 120 minutes, viscosity at 20 ° C 60
Epoxy resin of 00 cps was applied with a roller brush.
An undercoating treatment was carried out by applying the solution uniformly so as to be 6 kg / m 2 .
【００４４】導電性強化繊維シートとして、一方向性の
強化シート（引張強度３．５ＧＰａ、引張弾性率２３０
ＧＰａ、厚さ０．１１ｍｍ）を用い、寸法取りを行っ
た。この導電性強化繊維シートは、図３に示す通り炭素
繊維のフィラメント１２０００本を束ね、５回／ｍの軽
い撚りをかけたものを緯糸３２として隙間なく密に配置
し、また熱可塑性樹脂繊維とガラス繊維とをフィラメン
トとして含有する熱可塑性樹脂含有繊維を経糸３１とし
て１．５ｃｍ間隔で疎に配置して織物とし、さらに緯糸
３２と経糸３１とをホットメルトで接着したものであ
る。As a conductive reinforcing fiber sheet, a unidirectional reinforcing sheet (tensile strength: 3.5 GPa, tensile elastic modulus: 230)
Using GPa and a thickness of 0.11 mm), dimensioning was performed. As shown in FIG. 3, this conductive reinforcing fiber sheet is made by bundling 12000 carbon fiber filaments and lightly twisting 5 times / m and arranging the weft yarns 32 densely with no gaps. A thermoplastic resin-containing fiber containing a glass fiber as a filament is sparsely arranged as a warp 31 at intervals of 1.5 cm to form a woven fabric, and a weft yarn 32 and a warp yarn 31 are bonded together by hot melt.
【００４５】前記エポキシ樹脂塗布後直ちに、寸法取り
した前記導電性強化繊維シートを、緯糸を主筋方向Ｐに
配向させて墨出し位置に合わせながら塗布面に貼着し、
シート表面を導電性強化繊維方向へゴムベラでしごき、
エポキシ樹脂を繊維の中に含浸させ、繊維中の空気を追
い出して平滑にした。Immediately after the application of the epoxy resin, the dimensioned conductive reinforcing fiber sheet is attached to the application surface while aligning the weft in the principal line direction P and aligning with the marking position.
Iron the sheet surface in the direction of the conductive reinforcing fibers with a rubber spatula,
The epoxy resin was impregnated into the fibers and the air in the fibers was expelled to smooth them.
【００４６】貼着後、さらに前記エポキシ樹脂を、前記
導電性強化繊維シートの上から塗布量０．３ｋｇ／ｍ2
で均一に塗布し、十分強化繊維に含浸させて中塗り処理
をした。After sticking, the epoxy resin is further applied on the conductive reinforcing fiber sheet in an amount of 0.3 kg / m 2.
Was uniformly applied, and the reinforcing fibers were sufficiently impregnated to perform an intermediate coating treatment.
【００４７】さらにこの上に、同様な方法で下塗り、貼
着、及び中塗りの工程を行い、もう１層の導電性強化繊
維シートを配力筋方向（既に貼着した導電性強化繊維シ
ートの強化繊維の配向方向と直行する方向）に設けた。
さらに同様の方法で下塗り、貼着、及び中塗りの工程を
もう２回繰り返し、主筋方向Ｐ、続いて配力筋方向にも
う一層づつ導電性強化繊維シートを設け、最終的には導
電性強化繊維シートを、補強部分の主筋方向Ｐ及び配力
筋方向に、互い違いにそれぞれ２層づつ４層設けた。さ
らに同様な方法で下塗り（導電性強化繊維シートの上塗
り）し、ガラスクロス（平織、目付１２０ｇ／ｍ2、厚
さ０．０５ｍｍ、平均抵抗率１０10Ωｃｍ）を貼着し、
前記エポキシ樹脂を上塗りした。なお、各上塗り工程後
繊維の膨れ、皺、よれ等が発生した際には、ゴムベラ、
脱泡ローラー等を用いて、内部の空気を取り除く、導電
性強化繊維方向にしごく等の処理を行った。Further, on this, the steps of undercoating, attaching and intermediate coating are carried out in the same manner, and another layer of the conductive reinforcing fiber sheet is added in the direction of the force distribution direction (of the conductive reinforcing fiber sheet already adhered). It was provided in the direction orthogonal to the orientation direction of the reinforcing fibers).
Further, the steps of undercoating, pasting, and intermediate coating are repeated twice in the same manner, and a conductive reinforcing fiber sheet is further provided in the main muscle direction P and subsequently in the force distributing muscle direction, and finally the conductivity is strengthened. Four fiber sheets were provided alternately in the main reinforcement direction P and the distribution force direction of the reinforced portion, with two layers each. Further, undercoating (overcoating of conductive reinforcing fiber sheet) is carried out in the same manner, and glass cloth (plain weave, basis weight 120 g / m 2 , thickness 0.05 mm, average resistivity 10 10 Ωcm) is applied,
The epoxy resin was overcoated. When swelling, wrinkles, and twisting of the fiber occur after each top coating step, a rubber spatula,
Using a defoaming roller or the like, air inside was removed, and the conductive reinforcing fibers were subjected to a treatment such as ironing.
【００４８】４層の導電性強化繊維シートおよびガラス
クロスを設けた後、仕上げとしてウレタン系の耐候性塗
料を塗装した。After providing four layers of conductive reinforcing fiber sheet and glass cloth, urethane type weather resistant paint was applied as a finish.
【００４９】このように床版下面を導電性強化繊維シー
トで補強したことにより、主筋方向Ｐ、配力筋方向共
に、このコンクリートの引張応力度を７５ｋｇｆ／ｃｍ
2から６８ｋｇｆ／ｃｍ2に、引張鉄筋の引張応力度を１
７００ｋｇｆ／ｃｍ2から１３６０ｋｇｆ／ｃｍ2に低下
させ、それぞれ許容応力度以下とすることができた。By reinforcing the lower surface of the floor slab with the conductive reinforcing fiber sheet in this way, the tensile stress of the concrete is 75 kgf / cm in both the main reinforcement direction P and the distribution reinforcement direction.
From 2 to 68 kgf / cm 2 , set the tensile stress of tensile reinforcement to 1
700 kgf / cm 2 was reduced to 1360kgf / cm 2 from could be the following respective allowable stress.
【００５０】絶縁性を絶縁テスター（ｍａｘ２０００Ｍ
Ω）で１０００Ｖの電圧をかけて測定したところ絶縁抵
抗値は無限大を示し、良好な絶縁性を有していた。な
お、絶縁層を有しない場合は、絶縁抵抗値は１００Ω以
下であった。The insulation is measured by an insulation tester (max 2000M
When measured by applying a voltage of 1000 V with (Ω), the insulation resistance value showed infinity and had good insulation properties. When the insulating layer was not provided, the insulation resistance value was 100Ω or less.
【図１】図１は、導電性強化繊維シートと絶縁材料シー
トとを設けた本発明の補強方法の施工例を模式的に示す
断面図である。FIG. 1 is a cross-sectional view schematically showing a working example of the reinforcing method of the present invention in which a conductive reinforcing fiber sheet and an insulating material sheet are provided.
【図２】図２は、本発明の補強方法による、ＲＣ床版の
補強例を示す断面図である。FIG. 2 is a cross-sectional view showing an example of reinforcement of an RC floor slab by the reinforcement method of the present invention.
【図３】図３は、本発明に用いる導電性強化繊維シート
を示す模式図である。FIG. 3 is a schematic diagram showing a conductive reinforcing fiber sheet used in the present invention.
１２：プライマー層 １３：下塗り層 １４：導電性強化繊維シート １５：中塗り層 １６：絶縁材料シート １７：上塗り層 １８：保護層 ２２：床版 ３１：経糸 ３２：緯糸 12: Primer layer 13: Undercoat layer 14: Conductive reinforcing fiber sheet 15: Intermediate coating layer 16: Insulating material sheet 17: Topcoat layer 18: Protective layer 22: Floor slab 31: Warp 32: Weft
Claims (1)
設けて該構造物を補強するにあたり、該導電性強化繊維
シートの上下少なくとも一方の表面に絶縁材料シートを
設けることを特徴とする導電性強化シートによる構造物
の補強方法。1. An electrically conductive reinforcing fiber sheet is provided on the surface of a structure to reinforce the structure, wherein an insulating material sheet is provided on at least one of the upper and lower surfaces of the electrically conductive reinforcing fiber sheet. Reinforcement method for structures with a reinforcing sheet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP03680396A JP3523740B2 (en) | 1996-02-23 | 1996-02-23 | Method of reinforcing structure with conductive reinforcing fiber sheet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP03680396A JP3523740B2 (en) | 1996-02-23 | 1996-02-23 | Method of reinforcing structure with conductive reinforcing fiber sheet |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH09228552A true JPH09228552A (en) | 1997-09-02 |
| JP3523740B2 JP3523740B2 (en) | 2004-04-26 |
Family
ID=12479953
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP03680396A Expired - Fee Related JP3523740B2 (en) | 1996-02-23 | 1996-02-23 | Method of reinforcing structure with conductive reinforcing fiber sheet |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3523740B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105711199A (en) * | 2016-02-19 | 2016-06-29 | 苏州振瑞昌材料科技有限公司 | Manufacturing method of non-metal anti-corrosion daylighting plate manufactured from pre-weaving part with flow guide layer |
| CN113863123A (en) * | 2021-10-29 | 2021-12-31 | 中交公路长大桥建设国家工程研究中心有限公司 | High-durability concrete structure and construction method |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102108739B (en) * | 2009-12-28 | 2013-06-26 | 贵阳铝镁设计研究院有限公司 | Method and structure for insulating plant operative surface and support pillar |
-
1996
- 1996-02-23 JP JP03680396A patent/JP3523740B2/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105711199A (en) * | 2016-02-19 | 2016-06-29 | 苏州振瑞昌材料科技有限公司 | Manufacturing method of non-metal anti-corrosion daylighting plate manufactured from pre-weaving part with flow guide layer |
| CN113863123A (en) * | 2021-10-29 | 2021-12-31 | 中交公路长大桥建设国家工程研究中心有限公司 | High-durability concrete structure and construction method |
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