JP2002155509A - Reinforcing structure and reinforcement method for concrete structure - Google Patents
Reinforcing structure and reinforcement method for concrete structureInfo
- Publication number
- JP2002155509A JP2002155509A JP2001207300A JP2001207300A JP2002155509A JP 2002155509 A JP2002155509 A JP 2002155509A JP 2001207300 A JP2001207300 A JP 2001207300A JP 2001207300 A JP2001207300 A JP 2001207300A JP 2002155509 A JP2002155509 A JP 2002155509A
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- reinforcing
- paste
- resin
- concrete structure
- water
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Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、コンクリート構造
物の水中部又は湿潤部を補強する際に、水中にある補強
対象物の周囲を排水及び／又は乾燥することなく、補強
の施工を行うことのできるコンクリート構造物の補強構
造と補強方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of reinforcing a submerged or wet portion of a concrete structure without draining and / or drying the area around the object to be reinforced in the water. The present invention relates to a reinforcing structure and a reinforcing method for a concrete structure that can be made.
【０００２】[0002]
【従来の技術】橋、高架道路、トンネル、煙突等のコン
クリート構造物は、経時的な劣化や耐震基準の見直し等
のために、補強・補修が必要となっているものが多い。
陸上や地中のコンクリート構造物に関しては、従来から
種々の補強・補修の方法が実用化されており、とくに繊
維強化樹脂を用いた補強方法が多用されている。これは
高強度繊維とくに炭素繊維からなる繊維シートを、コン
クリート表面に接着性樹脂により貼り付けて補強するも
のである。2. Description of the Related Art Many concrete structures, such as bridges, elevated roads, tunnels, and chimneys, require reinforcement and repair in order to deteriorate with time and review seismic standards.
With respect to concrete structures on land and underground, various methods of reinforcement and repair have been put into practical use, and reinforcement methods using fiber reinforced resins have been widely used. In this method, a fiber sheet made of high-strength fiber, particularly carbon fiber, is reinforced by attaching it to the concrete surface with an adhesive resin.
【０００３】しかしながら、水中にあるコンクリート構
造物においては、かかる補強方法を直接適用することが
できない。この場合、通常は補強対象物の周囲に止水矢
板を打設して、その内側を排水することにより、陸上と
同じ作業空間を形成して、補強の施工を行うという手法
がとられている。[0003] However, in a concrete structure underwater, such a reinforcing method cannot be directly applied. In this case, a method is generally adopted in which a waterproof sheet pile is cast around the object to be reinforced and the inside thereof is drained, thereby forming the same working space as on land and performing reinforcement. .
【０００４】また、作業空間の形成を容易にするため、
特殊な止水ガイドと作業函を用いる方法（例えば特開平
９−２４２０８１号公報）や、作業空間を形成すること
なく既設構造物脚部の補強を行うため、脚部の周囲に所
定の間隙を設けて鋼製補強板を配し、この間隙に水中接
着性の接着材を注入する方法（例えば特開平１０−１５
９０２７号公報）等が提案されている。しかし、水中に
あるコンクリート構造物表面に、排水することなく、繊
維強化樹脂層を直接形成するような補強方法は未だ提案
されていない。In order to facilitate the formation of a work space,
In order to reinforce the legs of the existing structure without forming a work space by using a special water stop guide and a work box (for example, Japanese Patent Application Laid-Open No. 9-242081), a predetermined gap is formed around the legs. A method of disposing a steel reinforcing plate, and injecting an underwater adhesive into the gap (for example, Japanese Patent Application Laid-Open No. 10-15)
No. 9027) has been proposed. However, no reinforcement method has yet been proposed in which a fiber-reinforced resin layer is directly formed on the surface of a concrete structure in water without drainage.
【０００５】[0005]
【発明が解決しようとする課題】上述した作業空間を形
成する方法では、施工が複雑になりかつ長期間を要する
ため、その費用が大きくなる。また、補強面に鋼板を被
覆してその間隙に樹脂を注入する方法は、被覆の耐食性
に問題があり、かつ柱状でない構造物では鋼板を被覆す
る施工がしにくいという問題もある。The above-described method for forming a work space requires complicated construction and requires a long period of time, thus increasing the cost. Further, the method of coating the steel sheet on the reinforcing surface and injecting the resin into the gap has a problem in the corrosion resistance of the coating, and also has a problem that it is difficult to coat the steel sheet in a non-columnar structure.
【０００６】そこで本発明は、水中に構築されたコンク
リート構造物の水中部又は湿潤部を補強するに際して、
排水された作業空間を形成することなく、強度と耐食性
の優れた繊維強化樹脂の被覆を、水中にて形成しうる手
段を提供することを目的とする。これにより、水中部の
補強における施工を簡易にし、かつ工期を短縮して、施
工コストを大幅に低減することを目的とする。Accordingly, the present invention provides a method for reinforcing an underwater or wet part of a concrete structure constructed in water.
An object of the present invention is to provide means capable of forming a coating of a fiber-reinforced resin having excellent strength and corrosion resistance in water without forming a drained work space. Thus, the object of the present invention is to simplify construction for reinforcing the underwater part, shorten the construction period, and significantly reduce construction costs.
【０００７】[0007]
【課題を解決するための手段】上記課題を解決するため
の本発明のコンクリート構造物の補強構造は、水中にあ
る又は湿潤したコンクリート構造物の表面に、水中硬化
型の樹脂ぺーストからなるぺースト層が形成され、該ぺ
ースト層内に、樹脂を含浸させた強化繊維の縦方向及び
横方向の繊維束からなる複合繊維グリッドを埋め込んで
なるコンクリート構造物の補強構造である。The reinforcing structure for a concrete structure according to the present invention for solving the above-mentioned problems comprises a water-curable resin paste on the surface of a concrete structure in water or wet. This is a reinforcement structure for a concrete structure in which a strike layer is formed, and a composite fiber grid comprising longitudinal and lateral fiber bundles of reinforcing fibers impregnated with resin is embedded in the paste layer.
【０００８】上記の補強構造において、前記樹脂ペース
トは、水中硬化型エポキシ樹脂ペースト及び／又は水中
硬化型ポリエステル樹脂ペーストであることが好まし
い。In the above reinforcing structure, the resin paste is preferably a water-curable epoxy resin paste and / or a water-curable polyester resin paste.
【０００９】また、上記の補強構造において、前記強化
繊維は、炭素繊維、ガラス繊維及びアラミド繊維よりな
る群から選ばれた１種又は２種以上の繊維であることが
好ましい。In the above reinforcing structure, the reinforcing fibers are preferably one or more fibers selected from the group consisting of carbon fibers, glass fibers and aramid fibers.
【００１０】さらに、上記のいずれかの補強構造におい
て、前記グリッドは、その繊維束の径が０．５〜１５ｍ
ｍであり、かつ繊維束の縦方向及び横方向の間隔が１〜
５０ｍｍであることが好ましい。Further, in any of the above reinforcing structures, the grid may have a fiber bundle diameter of 0.5 to 15 m.
m, and the vertical and horizontal spacing of the fiber bundle is 1 to
It is preferably 50 mm.
【００１１】本発明のコンクリート構造物の補強方法の
第一は、水中にある又は湿潤したコンクリート構造物の
表面を水中硬化型の樹脂ぺーストで被覆してぺースト層
を形成させた後、強化繊維の縦方向及び横方向の繊維束
に樹脂を含浸させた複合繊維グリッドを、該樹脂が硬化
する前に前記ぺースト層の表面に貼り付けて、さらにそ
の表面を水中硬化型の樹脂ぺーストで被覆することを特
徴とするコンクリート構造物の補強方法である。The first method of reinforcing a concrete structure according to the present invention is as follows. The surface of a concrete structure in water or wet is coated with an underwater-curable resin paste to form a paste layer and then reinforced. A composite fiber grid obtained by impregnating a resin into fiber bundles in the vertical and horizontal directions of the fibers is attached to the surface of the paste layer before the resin is cured, and the surface is further cured with an underwater-curable resin paste. This is a method for reinforcing a concrete structure, characterized in that the structure is covered with:
【００１２】また、本発明のコンクリート構造物の補強
方法の第二は、水中にある又は湿潤したコンクリート構
造物の表面を水中硬化型の樹脂ぺーストで被覆してぺー
スト層を形成させた後、強化繊維の縦方向及び横方向の
繊維束に樹脂を含浸させた複合繊維グリッドを、該樹脂
が硬化する前に前記ぺースト層の表面に貼り付け、さら
にその後前記グリッドを囲う型枠を取り付けて、型枠内
面と前記グリッドとの間隙に水中硬化型の樹脂ぺースト
を充填することを特徴とするコンクリート構造物の補強
方法である。The second method of reinforcing a concrete structure according to the present invention is as follows: after a surface of a concrete structure in or under water is coated with a water-curable resin paste to form a paste layer. A composite fiber grid in which a resin bundle is impregnated in the longitudinal and lateral fiber bundles of the reinforcing fibers is attached to the surface of the paste layer before the resin is cured, and then a formwork surrounding the grid is attached. A method for reinforcing a concrete structure, characterized by filling a gap between an inner surface of a formwork and the grid with an underwater-curable resin paste.
【００１３】上記第一及び第二の補強方法において、前
記樹脂ペーストが、水中硬化型エポキシ樹脂ペースト及
び／又は水中硬化型ポリエステル樹脂ペーストであり、
かつ前記強化繊維が、炭素繊維、ガラス繊維及びアラミ
ド繊維よりなる群から選ばれた１種又は２種以上の繊維
であることが好ましい。In the first and second reinforcing methods, the resin paste is a water-curable epoxy resin paste and / or a water-curable polyester resin paste,
In addition, it is preferable that the reinforcing fibers are one or more types of fibers selected from the group consisting of carbon fibers, glass fibers, and aramid fibers.
【００１４】また、上記のいずれの補強方法において
も、その繊維束の径が０．５〜１５ｍｍであり、かつ繊
維束の縦方向及び横方向の間隔が１〜５０ｍｍであるこ
とが好ましい。In any of the above reinforcing methods, it is preferable that the diameter of the fiber bundle is 0.5 to 15 mm and the interval between the fiber bundles in the vertical and horizontal directions is 1 to 50 mm.
【００１５】[0015]
【発明の実施の形態】図１は、本発明のコンクリート構
造物の補強構造の説明図である。この補強構造は、コン
クリート構造物の補強しようとする部位の表面（補強
面）１に、水中硬化型の樹脂ぺーストからなるぺースト
層２が形成され、その内部に複合繊維グリッド３を埋め
込んでなるもので、補強面１が水中にある又は湿潤した
コンクリートの表面であることを特徴とする。DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is an explanatory view of a reinforcing structure for a concrete structure according to the present invention. In this reinforcing structure, a paste layer 2 made of an underwater-curable resin paste is formed on a surface (reinforcement surface) 1 of a portion of a concrete structure to be reinforced, and a composite fiber grid 3 is embedded therein. Wherein the reinforcing surface 1 is a submerged or wet concrete surface.
【００１６】この補強構造は、水中での強度と耐食性に
富み、かつ吸水して劣化することがないため、耐久性に
優れる。また、この補強構造は、排水された作業空間を
形成することなく、容易に水中の補強面に被覆の施工を
行いうるという利点を有する。The reinforcing structure is excellent in durability because it has high strength and corrosion resistance in water and does not deteriorate due to water absorption. Further, this reinforcing structure has an advantage that the coating can be easily applied to the underwater reinforcing surface without forming a drained work space.
【００１７】ぺースト層２を構成する樹脂ペーストは、
水中硬化型のものであればよいが、水中硬化型エポキシ
樹脂ペースト、水中硬化型ポリエステル樹脂ペーストが
とくに好適であり、これらの樹脂ペーストを単独で用い
ても、併用してもよい。The resin paste constituting the paste layer 2 is as follows:
A water-curable epoxy resin paste and a water-curable polyester resin paste are particularly suitable, and these resin pastes may be used alone or in combination.
【００１８】複合繊維グリッド３は、図２に示すよう
に、強化繊維の縦方向の繊維束４及び横方向の繊維束５
を所定の間隔で格子状に編み上げたものを用い、これに
予め（地上で）樹脂を含浸させておき、この樹脂が完全
硬化する前に、すなわち水中硬化型の樹脂ぺーストとの
接着性が失われないうちに、ぺースト層に貼り付ける施
工を行う。As shown in FIG. 2, the composite fiber grid 3 comprises a longitudinal fiber bundle 4 and a lateral fiber bundle 5 of reinforcing fibers.
Is woven in a lattice at predetermined intervals, and is impregnated with resin in advance (on the ground), and before the resin is completely cured, that is, the adhesiveness with the underwater-curable resin paste is improved. Before it is lost, work to paste it on the paste layer.
【００１９】本発明において、複合繊維グリッド３の強
化繊維は、強度が大きく、かつ吸湿して劣化する懸念が
ない繊維であればよいが、とくに炭素繊維、ガラス繊
維、アラミド繊維が好適であり、これらのうちの１種を
単体で用いても、２種以上を併用してもよい。複合繊維
グリッド３に予め樹脂を含浸させる理由は、強化繊維を
互に接着させることによりその曲げ強度を増大させるこ
と、繊維束が容易にぺースト層に貼り付くようにするこ
と、そして複合繊維グリッドの可撓性を確保することを
狙いとするものである。In the present invention, the reinforcing fibers of the composite fiber grid 3 may be any fibers that have high strength and are not likely to deteriorate due to moisture absorption. In particular, carbon fibers, glass fibers, and aramid fibers are preferable. One of these may be used alone or two or more of them may be used in combination. The reason for pre-impregnating the composite fiber grid 3 with a resin is to increase the bending strength of the reinforcing fibers by bonding them together, to make the fiber bundle easily adhere to the paste layer, and It is intended to ensure the flexibility of the above.
【００２０】格子状の複合繊維グリッドを用いる理由
は、水中で貼付けを行う際に、繊維束とぺースト層の間
に水が残留しないように、水の排出を容易にするためで
ある。また、この格子間でぺーストが自由に移動しうる
ようにして、初めに形成したぺースト層と後から被覆す
るぺーストが一体に接着されるようにするためである。The reason for using the lattice-shaped composite fiber grid is to facilitate drainage of water so that water does not remain between the fiber bundle and the paste layer when sticking in water. Another reason is that the paste can be freely moved between the lattices so that the paste layer formed first and the paste to be coated later are integrally bonded.
【００２１】本発明において、複合繊維グリッド３の縦
方向の繊維束４及び横方向の繊維束５は、ともにその径
が０．５〜１５ｍｍであり、かつ縦方向の繊維束間の間
隔及び横方向の繊維束間の間隔が、ともに１〜５０ｍｍ
であることが好ましい。In the present invention, both the longitudinal fiber bundles 4 and the lateral fiber bundles 5 of the composite fiber grid 3 have a diameter of 0.5 to 15 mm, and the distance between the longitudinal fiber bundles and the lateral Spacing between fiber bundles in each direction is 1 to 50 mm
It is preferable that
【００２２】縦方向又は横方向の繊維束の径が０．５ｍ
ｍ未満では、格子の間隔が大きくなった時に強度が不十
分となり、径が１５ｍｍを越えると、これをぺーストで
被覆する施工がしにくくなるためである。また、縦方向
又は横方向の繊維束の間隔が１ｍｍ未満では、粘土状の
ぺーストがこの間を自由に移動することが難しくなり、
これが５０ｍｍを越えると、繊維束の径が小さい時に強
度が不十分になるためである。The diameter of the fiber bundle in the vertical or horizontal direction is 0.5 m
When the diameter is less than m, the strength becomes insufficient when the interval between the lattices becomes large, and when the diameter exceeds 15 mm, it becomes difficult to coat the paste with a paste. In addition, if the interval between the fiber bundles in the vertical direction or the horizontal direction is less than 1 mm, it becomes difficult for the clay-like paste to move freely between these,
If the diameter exceeds 50 mm, the strength becomes insufficient when the diameter of the fiber bundle is small.
【００２３】なお補強部の強度を確保するためには、強
化繊維の目付量が１００〜１０００ｇ／ｍ2であること
が好ましく、この条件が維持されるように、繊維束の径
に応じて、適切な間隔を選定することが好ましい。さら
に、繊維束に含浸させる樹脂としては、ポリウレタン樹
脂もしくはポリエステル樹脂を用いることが好ましい。In order to secure the strength of the reinforcing portion, it is preferable that the basis weight of the reinforcing fiber is 100 to 1000 g / m 2 , and the condition is maintained according to the diameter of the fiber bundle. It is preferable to select an appropriate interval. Furthermore, it is preferable to use a polyurethane resin or a polyester resin as the resin impregnated in the fiber bundle.
【００２４】本発明のコンクリート構造物の補強方法の
第一は、水中にある又は湿潤したコンクリート構造物の
補強面を水中硬化型の樹脂ぺーストで被覆してぺースト
層を形成させた後、強化繊維の縦方向及び横方向の繊維
束に樹脂を含浸させた複合繊維グリッドを、該樹脂が硬
化する前に前記ぺースト層の表面に貼り付けて、さらに
その表面を水中硬化型の樹脂ぺーストで被覆することを
特徴とする。The first method of reinforcing a concrete structure according to the present invention is as follows. After a reinforcing surface of a concrete structure in water or wet is coated with a water-curable resin paste to form a paste layer, Before the resin is cured, a composite fiber grid obtained by impregnating the fiber bundles in the longitudinal and lateral directions of the reinforcing fibers with the resin is attached to the surface of the paste layer, and the surface is further cured with an underwater-curable resin paste. It is characterized by coating with a strike.
【００２５】また、本発明の補強方法の第二は、上記と
同様にぺースト層を形成し、上記と同様の複合繊維グリ
ッドをこのぺースト層の表面に貼り付けた後、このグリ
ッドを囲う型枠を取り付けて、型枠内面とグリッドとの
間隙に水中硬化型の樹脂ぺーストを充填することを特徴
とする。In the second method of the reinforcing method of the present invention, a paste layer is formed in the same manner as described above, and the same composite fiber grid as described above is attached to the surface of the paste layer, and then the grid is surrounded. A mold is attached, and a gap between the inner surface of the mold and the grid is filled with an underwater-curable resin paste.
【００２６】なお、上記第一及び第二の補強方法におい
ても、樹脂ぺーストとして水中硬化型エポキシ樹脂ペー
スト及び／又は水中硬化型ポリエステル樹脂ペーストを
用い、かつ強化繊維として、炭素繊維、ガラス繊維及び
アラミド繊維よりなる群から選ばれた１種又は２種以上
の繊維を用いることが好ましい。In the first and second reinforcing methods, an underwater-curable epoxy resin paste and / or an underwater-curable polyester resin paste are used as the resin paste, and carbon fibers, glass fibers and It is preferable to use one or more fibers selected from the group consisting of aramid fibers.
【００２７】以下、本発明の補強方法についてさらに詳
しく説明する。補強面１には、必要に応じて下地処理を
行う。下地処理の内容は、主に損傷部の補修と付着物の
除去である。損傷部の補修は、コンクリートの劣化層が
ある場合はこれを除去し、亀裂や凹部に、必要に応じて
水中硬化型のモルタルやぺーストを充填すればよい。付
着物には、藻類や微生物等の非固着性の付着物とフジツ
ボや貝類等の固着物がある。前者は、ブラッシングや水
ジェット等により除去すれば良い。Hereinafter, the reinforcing method of the present invention will be described in more detail. A groundwork treatment is performed on the reinforcing surface 1 as necessary. The contents of the base treatment are mainly repair of the damaged portion and removal of the attached matter. In repairing the damaged portion, if there is a degraded layer of concrete, it may be removed, and the cracks and recesses may be filled with underwater-hardening mortar or paste as needed. The deposits include non-fixed deposits such as algae and microorganisms and fixed deposits such as barnacles and shellfish. The former may be removed by brushing, water jet, or the like.
【００２８】本発明において、補強面を樹脂ぺーストで
被覆するに際しては、ぺーストを補強面に押し付けて、
その間に介在する水を排出する必要があり、そのために
は、ある程度の変形抵抗を有する粘土状の樹脂ぺースト
を用いる。また、このぺーストは水中で接着し硬化する
必要があるが、かかる樹脂ぺーストは従来より市販され
ており、エポキシ樹脂ぺーストの場合、例えば日本シー
カ社製のシーカガード６９４Ｈ等を用いれば良い。In the present invention, when covering the reinforcing surface with the resin paste, the paste is pressed against the reinforcing surface,
It is necessary to discharge water intervening in the meantime. For this purpose, a clay-like resin paste having a certain degree of deformation resistance is used. This paste must be adhered and cured in water, but such a resin paste is conventionally commercially available. In the case of an epoxy resin paste, for example, Sika Guard 694H manufactured by Sika Japan Co., Ltd. may be used.
【００２９】また、補強面を樹脂ぺーストで被覆する施
工の方法は、とくに限定することを要せず、例えば手の
ひらやコテでぺーストを押し付けて、表面が略平坦なぺ
ースト層が形成されるようにすればよい。あるいは、予
め地上で適当な大きさの平板状のぺーストのシートを作
成し、これを水中の補強面に押し付けて接着させるよう
な方法によってもよい。The method of coating the reinforcing surface with the resin paste does not need to be particularly limited. For example, the paste is pressed with a palm or an iron to form a paste layer having a substantially flat surface. What should I do? Alternatively, a method may be used in which a plate-like paste sheet of an appropriate size is prepared in advance on the ground, and the sheet is pressed against an underwater reinforcing surface and adhered.
【００３０】ぺースト層の表面に貼り付ける前記のグリ
ッドの形状及び大きさは、とくに限定を要しないが、例
えば、柱状の構造物の場合には、帯状のグリッドを巻き
付けるような方法によればよく、平面状の壁面の場合に
は、適当な大きさに分割された、矩形のグリッドを隙間
無く並べて貼り付けるような方法によればよい。The shape and size of the grid attached to the surface of the paste layer are not particularly limited. For example, in the case of a columnar structure, according to a method of winding a strip-shaped grid. In the case of a flat wall surface, a method in which rectangular grids, which are divided into appropriate sizes and are arranged side by side without any gap, may be used.
【００３１】このグリッドをぺースト層に貼り付けるに
は、とくに接着の手段を購ずる必要はなく、これをぺー
スト層に押し付けるだけで、その縦方向及び横方向の繊
維束がぺースト層内に一部貫入し、介在する水も排除さ
れて、貼付け状態を維持することができる。この際、繊
維束に含浸した樹脂は、ぺースト層と繊維束を馴染ませ
て、両者の接着性を良好にする機能をする。また、必要
に応じて、グリッドを局所的に、打鋲等の方法で仮止め
してもよい。In order to attach this grid to the paste layer, it is not necessary to purchase any special bonding means. Just press the paste against the paste layer, and the fiber bundles in the vertical and horizontal directions are shifted in the paste layer. , And the intervening water is also removed, so that the attached state can be maintained. At this time, the resin impregnated in the fiber bundle functions to make the paste layer and the fiber bundle conform to each other and to improve the adhesion between them. Further, if necessary, the grid may be temporarily fixed locally by a method such as driving a stud.
【００３２】さらに、本発明の第一の補強方法におい
て、複合繊維グリッドを貼り付けた後、その表面を樹脂
ぺーストで被覆する方法は、補強面に初めにぺースト層
を形成する方法と同様にすればよい。被覆後に、グリッ
ドがほぼ完全にぺーストの内部に埋め込まれた状態にな
っていればよく、被覆の厚みもとくに限定を要しない。
上記の被覆を終えた後、樹脂ぺーストを養生硬化させれ
ば補強の施工が完了する。Further, in the first reinforcing method of the present invention, the method of pasting the composite fiber grid and covering the surface with a resin paste is the same as the method of first forming a paste layer on the reinforcing surface. What should I do? It is sufficient that the grid is almost completely embedded inside the paste after coating, and there is no particular limitation on the thickness of the coating.
After completion of the above coating, the resin paste is cured and hardened to complete the reinforcement work.
【００３３】また、本発明の第二の補強方法において
は、複合繊維グリッドを貼り付けた後、その表面を囲っ
て型枠を配し、この型枠内面とグリッドとの間隙に樹脂
ぺーストを充填することにより、グリッドをぺーストで
被覆する。In the second reinforcing method of the present invention, after attaching the composite fiber grid, a mold is arranged around the surface thereof, and a resin paste is placed in a gap between the inner surface of the mold and the grid. Filling covers the grid with paste.
【００３４】型枠と複合繊維グリッドとの間隔は、この
グリッドを被覆するに十分な、一様な厚みのぺースト層
が形成され、かつぺーストを容易に充填しうる程度とす
ればよい。通常この型枠は、ぺーストを充填した後取り
外して再使用する。型枠の材質、大きさ、取り付けの方
法等は、施工の便を考慮して適宜選定すればよい。The spacing between the formwork and the composite fiber grid may be such that a paste layer of a uniform thickness sufficient to cover the grid is formed and the paste can be easily filled. Normally, the form is removed after filling with the paste and reused. The material, size, mounting method, and the like of the formwork may be appropriately selected in consideration of the convenience of construction.
【００３５】なお、上記の第一及び第二の補強方法にお
いても、繊維束の径を０．５〜１５ｍｍとし、その縦方
向及び横方向の間隔を１〜５０ｍｍとするのが好ましい
ことは、前記と同様である。In the first and second reinforcing methods, it is preferable that the diameter of the fiber bundle is 0.5 to 15 mm, and the vertical and horizontal intervals are 1 to 50 mm. Same as above.
【００３６】本発明の補強方法は、水中に立設された橋
脚、海洋構造物の支柱、岸壁下部、桟橋の支柱や床板等
のコンクリート構造物を補強するに際して、水中部は潜
水具を装着して作業することができ、また気中の湿潤部
は、必要に応じて波浪等に対する簡単な対策をとるのみ
で作業することができる。そのため、大がかりな機械器
具を必要とせず、その工期も従来より大幅に短縮しう
る。According to the reinforcing method of the present invention, when reinforcing a concrete structure such as a pier standing underwater, a pillar of an offshore structure, a lower part of a quay, a pillar of a pier, a floor plate, etc., a diving device is attached to the underwater part. The wet part in the air can be operated only by taking simple measures against waves and the like as necessary. Therefore, a large-scale machine is not required, and the construction period can be significantly shortened as compared with the related art.
【００３７】また、本発明の補強構造は、陸上構造物に
おけると同様に、曲げ耐力や剪断耐力を向上させること
によって、耐震性を大幅に向上させることができる。さ
らにこの補強構造は、耐食性が高いため、鋼製材料を用
いる場合よりも耐久性に優れている。なお、本発明の補
強構造および補強方法は、トンネルの漏水箇所のよう
な、陸上のコンクリート構造物の湿潤部にも適用しうる
ことは云うまでもない。Further, the reinforcing structure of the present invention can greatly improve the earthquake resistance by improving the bending strength and the shear strength as in the case of the onshore structure. Further, since the reinforcing structure has high corrosion resistance, it has higher durability than the case where a steel material is used. It is needless to say that the reinforcing structure and the reinforcing method of the present invention can also be applied to a wet portion of a land-based concrete structure, such as a leak point of a tunnel.
【００３８】[0038]
【実施例】本発明の補強方法による被覆の施工を、模擬
的に水槽内にて行い、被覆の剥離性及び強度を評価し
た。試験に供したコンクリート基材（コンクリートの圧
縮強度は２１０ｋｇｆ／ｃｍ2）は、外径３０ｃｍの円
筒で、これを水槽内に水没直立させ、水面下０〜５０ｃ
ｍの範囲に、本発明の方法により被覆施工した。まず、
水槽内に供試コンクリート材を一昼夜水没放置した後、
その表面をブラッシングで洗浄し、日本シーカ社製シー
カガード６９４Ｈエポキシ樹脂ぺーストを約２ｍｍの厚
みに被覆した。この際、コテでぺーストをコンクリート
面に十分押し付けるとともに、その表面が略平坦になる
ように調整した。EXAMPLES The application of a coating by the reinforcing method of the present invention was simulated in a water tank, and the peelability and strength of the coating were evaluated. The concrete substrate (concrete compressive strength of 210 kgf / cm 2 ) used in the test was a cylinder having an outer diameter of 30 cm, which was immersed in a water tank and erected upright.
In the range of m, coating was performed by the method of the present invention. First,
After leaving the test concrete material submerged in the water tank all day long,
The surface was washed by brushing, and coated with a Seakaguard 694H epoxy resin paste manufactured by Sika Japan to a thickness of about 2 mm. At this time, the paste was pressed sufficiently against the concrete surface with an iron, and the surface was adjusted so as to be substantially flat.
【００３９】複合繊維グリッドとしては、径約２０μｍ
の炭素繊維のモノフィラメントを３０００本程度束ねた
径約１．５ｍｍの炭素繊維束を、縦方向及び横方向とも
に約３０ｍｍの格子間隔で編み上げて、帯状のグリッド
を形成したものを使用した。このグリッドにコグニスジ
ャパン社製ポリウレタン樹脂を含浸させ、含浸後約７２
時間放置した後、水中の供試円筒のぺースト層の上に巻
き付けた。The composite fiber grid has a diameter of about 20 μm.
A carbon fiber bundle having a diameter of about 1.5 mm, obtained by bundling about 3000 carbon fiber monofilaments, was knitted at a lattice spacing of about 30 mm in both the vertical and horizontal directions to form a band-like grid. This grid is impregnated with a polyurethane resin manufactured by Cognis Japan Co., Ltd.
After standing for a time, it was wound on the paste layer of the test cylinder in water.
【００４０】グリッドが一部ぺースト層内に貫入する程
度に押し付けて、巻き付け状態を維持し、その表面にさ
らに前記と同じエポキシ樹脂ぺーストを約２ｍｍの厚み
に被覆した。被覆後約７日間水中で放置して、ぺースト
を硬化させた後、供試円筒を引上げて、以下の剥離試験
及び強度試験を行なった。The grid was pressed to such an extent that it partially penetrated into the paste layer to maintain the wound state, and the surface was further coated with the same epoxy resin paste as described above to a thickness of about 2 mm. After the coating was allowed to stand in water for about 7 days to cure the paste, the test cylinder was pulled up and subjected to the following peeling test and strength test.
【００４１】剥離試験としては、建研式プルオフ法によ
り（ＪＩＳＫ５４００に基いて）行い、被覆の曲げ強度
を、ＣＣＡ協議会の炭素繊維シートで実施している３点
曲げ法により測定した。The peel test was performed by the Kenken pull-off method (based on JIS K5400), and the bending strength of the coating was measured by a three-point bending method performed on carbon fiber sheets of the CCA Council.
【００４２】その結果、剥離性に関しては、４０ｋｇｆ
／ｃｍ2以上のコンクリート基材の凝集破壊であり、曲
げ強度は、４０ｋｇｆ／ｃｍ2以上であった。これらの
数値は、前記の施工を気中で行なった場合の剥離性や強
度値にほぼ匹敵するものであり、本発明の方法により、
水中においても、気中におけると同様の密着性と強度を
有する被覆の形成が可能なことが確められた。As a result, regarding the releasability, 40 kgf
/ Cm 2 or more due to cohesive failure of the concrete base material, and the flexural strength was 40 kgf / cm 2 or more. These numerical values are almost comparable to the peelability and strength value when the above-mentioned construction is performed in the air, and according to the method of the present invention,
It was confirmed that it is possible to form a coating having the same adhesion and strength as in air even in water.
【００４３】[0043]
【発明の効果】本発明により、水中のコンクリート構造
物の表面に、強度と耐食性の優れた繊維強化樹脂の被覆
を、水中で施工して形成することが可能になった。これ
により、コンクリート構造物の水中部の補強の工期を短
縮することができ、施工コストを大幅に節減することが
可能になった。According to the present invention, it is possible to form a coating of a fiber-reinforced resin having excellent strength and corrosion resistance on the surface of a concrete structure in water by applying the coating in water. As a result, the construction period for reinforcing the underwater part of the concrete structure can be shortened, and the construction cost can be greatly reduced.
【図１】本発明のコンクリート構造物の補強構造の説明
図である。FIG. 1 is an explanatory diagram of a reinforcing structure of a concrete structure according to the present invention.
【図２】本発明に用いる複合繊維グリッドの例を示す説
明図である。FIG. 2 is an explanatory view showing an example of a composite fiber grid used in the present invention.
１ 補強面 ２ ぺースト層 ３ 複合繊維グリッド ４ 縦方向の繊維束 ５ 横方向の繊維束 DESCRIPTION OF SYMBOLS 1 Reinforcement surface 2 Paste layer 3 Composite fiber grid 4 Vertical fiber bundle 5 Horizontal fiber bundle
───────────────────────────────────────────────────── フロントページの続き (72)発明者 芦野 孝行 東京都千代田区岩本町二丁目11番９号 日 鉄防蝕株式会社内 Ｆターム(参考） 2D059 AA03 GG02 GG23 GG40 GG55 2E176 AA01 BB29 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Takayuki Ashino 2-11-9 Iwamotocho, Chiyoda-ku, Tokyo F-term (in reference) 2D059 AA03 GG02 GG23 GG40 GG55 2E176 AA01 BB29
Claims (7)
造物の表面に、水中硬化型の樹脂ペーストからなるぺー
スト層が形成され、該ぺースト層内に、樹脂を含浸させ
た強化繊維の縦方向及び横方向の繊維束からなる複合繊
維グリッドを埋め込んでなるコンクリート構造物の補強
構造。1. A paste layer made of an underwater-curable resin paste is formed on the surface of a concrete structure in water or wet, and a longitudinal direction of a reinforcing fiber impregnated with a resin is formed in the paste layer. And a reinforcing structure for a concrete structure in which a composite fiber grid composed of horizontal fiber bundles is embedded.
シ樹脂ペースト及び／又は水中硬化型ポリエステル樹脂
ペーストである請求項１記載のコンクリート構造物の補
強構造。2. The reinforcing structure for a concrete structure according to claim 1, wherein the resin paste is a water-curable epoxy resin paste and / or a water-curable polyester resin paste.
及びアラミド繊維よりなる群から選ばれた１種又は２種
以上の繊維である請求項１又は２記載のコンクリート構
造物の補強構造。3. The reinforcing structure for a concrete structure according to claim 1, wherein the reinforcing fibers are one or more fibers selected from the group consisting of carbon fibers, glass fibers, and aramid fibers.
５ｍｍであり、かつ繊維束の縦方向及び横方向の間隔が
１〜５０ｍｍである請求項１〜３のいずれかに記載のコ
ンクリート構造物の補強構造。4. A fiber bundle having a diameter of 0.5 to 1 in the grid.
The reinforcing structure for a concrete structure according to any one of claims 1 to 3, wherein the length of the fiber bundle is 5 mm and the interval between the fiber bundles in the vertical and horizontal directions is 1 to 50 mm.
造物の表面を水中硬化型の樹脂ペーストで被覆してぺー
スト層を形成させた後、強化繊維の縦方向及び横方向の
繊維束に樹脂を含浸させた複合繊維グリッドを、該樹脂
が硬化する前に前記ぺースト層の表面に貼り付けて、さ
らにその表面を水中硬化型の樹脂ペーストで被覆するこ
とを特徴とするコンクリート構造物の補強方法。5. After the surface of a concrete structure in water or wet is coated with a water-curable resin paste to form a paste layer, the resin is applied to the longitudinal and lateral fiber bundles of the reinforcing fibers. A method for reinforcing a concrete structure, comprising: adhering an impregnated composite fiber grid to the surface of the paste layer before the resin is cured; and further covering the surface with an underwater-curable resin paste. .
造物の表面を水中硬化型の樹脂ペーストで被覆してぺー
スト層を形成させた後、強化繊維の縦方向及び横方向の
繊維束に樹脂を含浸させた複合繊維グリッドを、該樹脂
が硬化する前に前記ぺースト層の表面に貼り付け、さら
にその後前記グリッドを囲う型枠を取り付けて、型枠内
面と前記グリッドとの間隙に水中硬化型の樹脂ぺースト
を充填することを特徴とするコンクリート構造物の補強
方法。6. After the surface of a concrete structure in water or wet is coated with a water-curable resin paste to form a paste layer, the resin is applied to the longitudinal and lateral fiber bundles of the reinforcing fibers. Before the resin is cured, the impregnated composite fiber grid is attached to the surface of the paste layer, and then a formwork surrounding the grid is attached, and an underwater curing type is provided in a gap between the formwork inner surface and the grid. A method for reinforcing a concrete structure, characterized by filling with a resin paste.
シ樹脂ペースト及び／又は水中硬化型ポリエステル樹脂
ペーストであり、かつ前記強化繊維が、炭素繊維、ガラ
ス繊維及びアラミド繊維よりなる群から選ばれた１種又
は２種以上の繊維である請求項５又は６記載のコンクリ
ート構造物の補強方法。7. The resin paste is a water-curable epoxy resin paste and / or a water-curable polyester resin paste, and the reinforcing fibers are selected from the group consisting of carbon fibers, glass fibers and aramid fibers. The method for reinforcing a concrete structure according to claim 5, wherein the method is a kind or two or more kinds of fibers.
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|---|---|---|---|
| JP2001207300A JP4035297B2 (en) | 2000-09-08 | 2001-07-09 | Reinforcing structure and reinforcing method for concrete structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000272857 | 2000-09-08 | ||
| JP2000-272857 | 2000-09-08 | ||
| JP2001207300A JP4035297B2 (en) | 2000-09-08 | 2001-07-09 | Reinforcing structure and reinforcing method for concrete structure |
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| Publication Number | Publication Date |
|---|---|
| JP2002155509A true JP2002155509A (en) | 2002-05-31 |
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| WO2011153160A2 (en) * | 2010-06-01 | 2011-12-08 | Universal Floor And Wall Systems, Inc. | Method and system for remediating and covering wood floors |
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| JP2012012870A (en) * | 2010-07-02 | 2012-01-19 | Sumitomo Mitsui Construction Co Ltd | Method for reinforcing structure |
| KR101134993B1 (en) * | 2011-02-24 | 2012-04-09 | 주식회사 케이씨씨 | Concrete structures having blast resistance and method for manufacturing the same |
| JP2015094191A (en) * | 2013-11-14 | 2015-05-18 | 日鉄住金防蝕株式会社 | Impervious structure and method for forming the same |
| WO2015126215A1 (en) * | 2014-02-21 | 2015-08-27 | 주식회사 서림 | Sr concrete pile using fiber reinforcing material |
| KR101430518B1 (en) * | 2014-02-21 | 2014-08-18 | 박연수 | Seismic reinforcement Concrete pile using fiber reinforcement |
| JP2015232237A (en) * | 2014-06-10 | 2015-12-24 | 積水化学工業株式会社 | Reinforcement member, reinforcement structure, and electric pole reinforcing method |
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