JP6518450B2 - Method and structure for reinforcing metal pipe column - Google Patents
Method and structure for reinforcing metal pipe column Download PDFInfo
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- JP6518450B2 JP6518450B2 JP2015017601A JP2015017601A JP6518450B2 JP 6518450 B2 JP6518450 B2 JP 6518450B2 JP 2015017601 A JP2015017601 A JP 2015017601A JP 2015017601 A JP2015017601 A JP 2015017601A JP 6518450 B2 JP6518450 B2 JP 6518450B2
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- 229910052751 metal Inorganic materials 0.000 title claims description 144
- 239000002184 metal Substances 0.000 title claims description 144
- 238000000034 method Methods 0.000 title claims description 49
- 230000003014 reinforcing effect Effects 0.000 title claims description 39
- 229920002430 Fibre-reinforced plastic Polymers 0.000 claims description 62
- 239000011151 fibre-reinforced plastic Substances 0.000 claims description 58
- 229920005989 resin Polymers 0.000 claims description 53
- 239000011347 resin Substances 0.000 claims description 53
- 239000000835 fiber Substances 0.000 claims description 38
- 239000007788 liquid Substances 0.000 claims description 22
- 230000002787 reinforcement Effects 0.000 claims description 17
- 238000004804 winding Methods 0.000 claims description 12
- 230000002093 peripheral effect Effects 0.000 claims description 9
- 238000003825 pressing Methods 0.000 claims description 6
- 238000005452 bending Methods 0.000 claims description 3
- 239000002990 reinforced plastic Substances 0.000 claims description 2
- 238000005260 corrosion Methods 0.000 description 8
- 230000007797 corrosion Effects 0.000 description 8
- 230000004048 modification Effects 0.000 description 8
- 238000012986 modification Methods 0.000 description 8
- 239000011248 coating agent Substances 0.000 description 5
- 238000000576 coating method Methods 0.000 description 5
- 239000013305 flexible fiber Substances 0.000 description 4
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- 239000012779 reinforcing material Substances 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 238000007747 plating Methods 0.000 description 2
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Description
本発明は、金属管柱の補強方法及び補強構造に関し、特に可撓性の繊維強化プラスチックシートを用いた金属管柱の補強方法及び補強構造に関する。 The present invention relates to a reinforcing method and a reinforcing structure of a metal tubular column, and more particularly to a reinforcing method and a reinforcing structure of a metallic tubular column using a flexible fiber reinforced plastic sheet.
従来から、照明柱又は標識柱等には金属製の管柱（金属管柱）が用いられており、金属管柱は、通常、コンクリート基礎にボルト接合されるベースプレートをその下端部に溶接固定し、ベースプレートを地中に埋設することにより設置される。 Conventionally, metal tubular columns (metal tubular columns) have been used for lighting columns or signposts, and metal tubular columns are usually welded to a lower end portion of a base plate bolted to a concrete foundation. , It is installed by embedding the base plate in the ground.
金属管柱は、設置されてから長期間経過すると、特に湿気や雨水が溜まりやすい地表面近くの部分の塗装またはめっきが剥離し、その剥離個所が雨水によって腐食して腐食部を形成することで弱くなることが知られている。腐食部を有する金属管柱は、強風や人が触れただけで腐食部を起点に折れ曲がる恐れがあり、非常に危険である。 Over a long period of time after installation, the paint or plating on the part near the ground surface where moisture or rain water is likely to accumulate is exfoliated, and the exfoliated part is corroded by the rainwater to form a corroded part. It is known to be weak. A metal pipe column having a corroded portion is very dangerous because it may be bent starting from the corroded portion by strong wind or only human contact.
近年、このような腐食部を有する金属管柱が多くなっており、金属管柱の腐食部を補強する技術が種々提案されている。例えば、特許文献１には、金属管柱の腐食部近傍の外周囲を取り巻き、金属管柱との間にモルタル充填空間が形成される補強管を備える補強材が開示されている。この補強材は、さらに、金属管柱の腐食部近傍の内部に上下方向に沿って挿入され、周方向に２分割された一対の半割り管と、金属管柱と同径で、一対の半割り管の周囲に嵌合されたリングとを備えている。 In recent years, metal pipe columns having such a corroded portion are increasing, and various techniques for reinforcing the corroded portion of the metal pipe column have been proposed. For example, Patent Document 1 discloses a reinforcing material including a reinforcing pipe which wraps around the outer periphery of a metal pipe column in the vicinity of a corroded portion and in which a mortar filling space is formed between the metal pipe column and the metal pipe column. The reinforcing material is further inserted along the vertical direction inside the vicinity of the corrosion portion of the metal pipe column, and a pair of half pipes divided in the circumferential direction into two halves, and a pair of half pipes having the same diameter as the metal pipe column. And a ring fitted around the split tube.
ところで、特許文献１に記載の補強材では、補強管に金属管柱が挿入されるため、補強管の内径は金属管柱の外径より大きくてはならない。また同様に、一対の半割り管は金属管柱に挿入されるため、一対の半割り管の外径は金属管柱の内径より小さくてはならない。従って、金属管柱の大きさに応じて異なる補強管及び半割り管を用意する必要があり、汎用性が低いという問題がある。
そこで、本発明は、かかる問題点に鑑み、汎用性の高い金属管柱の補強方法及び補強構造を提供することを目的とする。
By the way, in the reinforcing material described in Patent Document 1, since the metal pipe column is inserted into the reinforcing pipe, the inner diameter of the reinforcing pipe must not be larger than the outer diameter of the metal pipe column. Similarly, since the pair of half tubes are inserted into the metal tube column, the outer diameter of the pair of half tubes must not be smaller than the inner diameter of the metal tube column. Therefore, it is necessary to prepare different reinforcing pipes and half pipes according to the size of the metal pipe column, and there is a problem that the versatility is low.
Then, an object of this invention is to provide the reinforcement method and reinforcement structure of a metal pipe column with high versatility in view of this problem.
上記目的を達成するために、本発明の一態様に係る金属管柱の補強方法は、外周面に腐食部を持つ金属管柱を補強する方法であって、前記金属管柱の腐食部を除去する除去工程と、前記除去が行われた除去部の周辺部に液状の樹脂を塗布する第１塗布工程と、樹脂を含ませることで曲げ強度を向上し、長さ方向で形状が変化し難いようにした棒状の繊維を、前記除去部としての有底凹部または貫通孔における空間を跨ぐように前記金属管柱の表面に配置し、前記塗布された液状の樹脂を介して前記棒状の繊維を前記金属管柱に接着する接着工程と、前記金属管柱に接着された前記棒状の繊維の表面に液状の樹脂を塗布する第２塗布工程とを含むことを特徴とする。 In order to achieve the above object, a method of reinforcing a metal pipe column according to an aspect of the present invention is a method of reinforcing a metal pipe column having a corroded portion on an outer peripheral surface, and removing the corroded portion of the metal pipe column a removing step of a first coating step of coating the liquid resin on the periphery of the removal section in which the removal is performed, to improve the bending strength in Rukoto impregnated with resin, the shape is changed in lengthwise direction The rod- like fiber which is made difficult is disposed on the surface of the metal tubular column so as to straddle the space in the bottomed recess or the through hole as the removing portion , and the rod- like fiber is interposed via the applied liquid resin. And a second application step of applying a liquid resin to the surface of the rod-like fiber adhered to the metal tube column.
ここで、前記接着工程では、複数の前記棒状の繊維をシート状に並べて構成される可撓性の繊維強化プラスチックシートを前記金属管柱に巻き付け、前記塗布された液状の樹脂を介して前記繊維強化プラスチックシートを前記金属管柱に接着し、前記第２塗布工程では、前記金属管柱に接着された前記繊維強化プラスチックシートの表面に液状の樹脂を塗布してもよい。 Here, in the bonding step, a flexible fiber-reinforced plastic sheet configured by arranging a plurality of rod-like fibers in a sheet shape is wound around the metal pipe column, and the fiber is applied via the applied liquid resin. A reinforced plastic sheet may be adhered to the metal pipe column, and a liquid resin may be applied to the surface of the fiber-reinforced plastic sheet adhered to the metal pipe column in the second application step.
また、前記接着工程では、前記複数の棒状の繊維が前記金属管柱の周方向に並び、かつ、前記棒状の繊維の長さ方向が前記金属管柱の高さ方向と略一致するように、前記繊維強化プラスチックシートが前記金属管柱に巻き付けられてもよい。 Further, in the bonding step, the plurality of rod-like fibers are arranged in the circumferential direction of the metal tubular column, and the length direction of the rod-like fibers substantially matches the height direction of the metal tubular column. The fiber reinforced plastic sheet may be wound around the metal tubular column.
また、前記金属管柱の補強方法は、さらに、前記接着工程と前記第２塗布工程との間に、前記繊維強化プラスチックシートの表面において前記金属管柱にバンドを巻き付け、前記繊維強化プラスチックシートを前記金属管柱に押さえ付ける押さえ付け工程を含んでもよい。 Further, in the reinforcing method of the metal tubular column, a band is further wound around the metal tubular column on the surface of the fiber reinforced plastic sheet between the adhering step and the second applying step, and the fiber reinforced plastic sheet is The method may include a pressing step of pressing the metal tube column.
また、本発明の一態様に係る金属管柱の補強構造は、上記金属管柱の補強方法によって、前記金属管柱の表面に前記棒状の繊維が接着されていることを特徴とする。 The reinforcing structure of the metal pipe column according to one aspect of the present invention is characterized in that the rod-like fibers are adhered to the surface of the metal pipe column by the reinforcing method of the metal pipe column.
本発明によれば、汎用性の高い金属管柱の補強方法及び補強構造を実現することができる。 ADVANTAGE OF THE INVENTION According to this invention, the reinforcement method and reinforcement structure of a highly versatile metal pipe column are realizable.
以下、本発明の実施形態について、図面を用いて詳細に説明する。
まず、本発明の実施形態に係る金属管柱の補強方法について、図１〜２を用いて説明する。
図１及び図２は、本実施形態に係る金属管柱１０の補強方法を説明するための斜視図である。
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
First, a method of reinforcing a metal tubular column according to an embodiment of the present invention will be described with reference to FIGS.
FIG.1 and FIG.2 is a perspective view for demonstrating the reinforcement method of the metal tube pillar 10 which concerns on this embodiment.
本実施形態に係る金属管柱１０の補強方法は、設置されてから長期間経過し、地表面２０近くの外周部分に錆等の腐食部１１が発生した金属柱管１０を補強する方法であって、可撓性の繊維強化プラスチックシート３０を用いるものである。 The reinforcing method of the metal pipe column 10 according to the present embodiment is a method of reinforcing the metal column pipe 10 in which a corrosion portion 11 such as rust is generated in an outer peripheral portion near the ground surface 20 after a long time since installation. The flexible fiber reinforced plastic sheet 30 is used.
金属管柱１０は、鋼、アルミニウム及びステンレス等から構成される管状の柱であり、外周面に灯具や看板が取り付けられると共に、その下端が地中に埋設されて、照明柱又は標識柱等を構成する。本実施形態において、金属管柱１０の下端にはベースプレート１２が溶接固定されており、ベースプレート１２はコンクリート基礎にボルト接合されている（図示しない）。本実施形態の金属管柱１０は円柱であるが、これに限定されず、多角形柱であってもよい。 The metal tube pillar 10 is a tubular pillar made of steel, aluminum, stainless steel or the like, and a lamp and a sign are attached to the outer peripheral surface, and the lower end thereof is buried in the ground to Configure. In the present embodiment, the base plate 12 is welded and fixed to the lower end of the metal pipe column 10, and the base plate 12 is bolted to a concrete foundation (not shown). Although the metal tube pillar 10 of this embodiment is a cylinder, it is not limited to this and may be a polygonal pillar.
繊維強化プラスチックシート３０は、図２（ａ）に示すように、すだれ状のシートであり、樹脂を含侵させて強度（特に曲げ強度）向上が図られた棒状の繊維３１をその長手方向と交差する方向、例えば直交する方向に複数本を並列配置し、配置された繊維３１を連結部材３２により連結して構成されている。従って、繊維強化プラスチックシート３０は、繊維３１の長さ方向で形状が変化し難く、繊維３１の並び方向で形状が変化し易い可撓性のシートとなっている。このように繊維強化プラスチックシート３０がすだれ状に構成されたことにより、金属管柱１０への巻き付け易さと金属管柱１０の強固な補強との両立が可能である。本実施形態において、連結部材３２として紐を用い、繊維３１として炭素繊維を用いている。
本実施形態の金属管柱１０の補強方法では、まず、図１（ａ）に示すように、外周部分に腐食部１１を持つ金属管柱１０が作業者の目視により確認される。
The fiber-reinforced plastic sheet 30, as shown in FIG. 2 (a), is a sheet in the shape of a bush, and is a rod-like fiber 31 in which the strength (particularly bending strength) is improved by impregnating a resin. A plurality of fibers are arranged in parallel in the intersecting direction, for example, the orthogonal direction, and the arranged fibers 31 are connected by the connecting member 32. Therefore, the fiber-reinforced plastic sheet 30 is a flexible sheet whose shape does not easily change in the longitudinal direction of the fibers 31 and whose shape easily changes in the direction in which the fibers 31 are arranged. Thus, the fiber-reinforced plastic sheet 30 is formed in the shape of a comb, which makes it possible to achieve both the ease of winding around the metal pipe column 10 and the strong reinforcement of the metal pipe column 10. In the present embodiment, a cord is used as the connecting member 32, and a carbon fiber is used as the fiber 31.
In the reinforcing method of the metal pipe pillar 10 of the present embodiment, first, as shown in FIG. 1A, the metal pipe pillar 10 having the corrosion portion 11 in the outer peripheral portion is visually confirmed by the worker.
次に、図１（ｂ）に示すように、腐食部１１全体が露出するまで金属管柱１０周囲の地表面２０が掘削されて掘削部２１が形成される。例えば、金属管柱１０の地中に埋設されていた下部が全て露出し、金属管柱１０の下端周囲のベースプレート１２の少なくとも一部が露出する深さまで、金属管柱１０周囲の地表面２０が掘削される。掘削部２１は、後述する作業を地表面２０が支障しない程度の体積で形成されることが好ましい。 Next, as shown in FIG. 1 (b), the ground surface 20 around the metal pipe pillar 10 is excavated until the entire corroded portion 11 is exposed, whereby the excavated portion 21 is formed. For example, the ground surface 20 around the metal pipe pillar 10 is deep enough to expose all the lower part of the metal pipe pillar 10 buried in the ground and expose at least a part of the base plate 12 around the lower end of the metal pipe pillar 10 It is excavated. The excavating portion 21 is preferably formed with a volume that does not disturb the ground surface 20 in the work to be described later.
次に、図１（ｃ）に示すように、腐食部１１に対して研磨（ケレン）等が行われることにより腐食部１１が全て除去される。この除去が行われた金属管柱１０の部分である除去部１３は図１（ｃ）で略長方形状であるが、腐食部１１の形状に応じ、除去部１３も種々の形状となる。このとき、腐食部１１は金属管柱１０の管厚み方向の浅くに留まり、除去部１３として有底凹部が形成されている。 Next, as shown in FIG. 1C, the corroded portion 11 is polished (queried) or the like to completely remove the corroded portion 11. Although the removal part 13 which is a part of metal tube pillar 10 to which this removal was performed is substantially rectangular shape in FIG.1 (c), according to the shape of the corrosion part 11, the removal part 13 also becomes various shapes. At this time, the corroded portion 11 remains shallow in the pipe thickness direction of the metal pipe column 10, and a bottomed concave portion is formed as the removing portion 13.
次に、図２（ａ）に示すように、金属管柱１０における除去部１３及び除去部１３の外縁と同一高さに位置する第１塗布部分と、第１塗布部分の上下に位置する第２塗布部分（擦付け部分）とに液状の樹脂４０が塗布される。例えば、金属管柱１０における第１塗布部分の上端に隣接して位置する幅１０ｍｍの部分と、第１塗布部分の下端に隣接して位置する幅１０ｍｍの部分とを第２塗布部分として塗布が行われる。この塗布により、除去部１３である有底凹部の空間は樹脂４０によって埋められる。このため、除去部１３の位置にて繊維強化プラスチックシート３０を安定的に配置できる。 Next, as shown in FIG. 2A, the first application portion located at the same height as the removal portion 13 and the outer edge of the removal portion 13 in the metal tubular column 10 and the first and second application portions A liquid resin 40 is applied to the two application parts (sliding parts). For example, a portion of 10 mm in width adjacent to the upper end of the first application portion in the metal tubular column 10 and a portion of 10 mm in width adjacent to the lower end of the first application portion are applied as the second application portion. To be done. By this application, the space of the bottomed concave portion which is the removing portion 13 is filled with the resin 40. For this reason, the fiber reinforced plastic sheet 30 can be stably arranged at the position of the removing portion 13.
このとき、樹脂４０が塗布される第１塗布部分及び第２塗布部分に対して、金属管柱１０の塗装またはめっきを除去するために、図１（ｃ）の腐食部１１の除去が行われた後で、プライマーとしての液状の樹脂が塗布及び乾燥されてプライマー処理が行われることが好ましい。 At this time, the removal of the corroded portion 11 of FIG. 1C is performed in order to remove the coating or plating of the metal tubular column 10 with respect to the first application portion and the second application portion to which the resin 40 is applied. After that, it is preferable that a liquid resin as a primer is applied and dried to perform primer treatment.
また、第１塗布部分及び第２塗布部分を合わせた塗布部分に確実に樹脂４０が塗布されるように、塗布部分の上端と下端との距離は、繊維強化プラスチックシート３０の幅（繊維３１の長さ）より大きく、遊び領域がある距離であることが好ましい。この場合、繊維強化プラスチックシート３０を金属管柱１０に巻き付けた後、繊維強化プラスチックシート３０の上端及び下端の少なくともいずれかに樹脂４０がはみ出て存在することとなる。 Further, the distance between the upper end and the lower end of the coated portion is determined by the width of the fiber reinforced plastic sheet 30 (the fiber 31 so as to ensure that the resin 40 is applied to the coated portion combining the first and second coated portions). Preferably the distance is greater than the length) and the play area is. In this case, after the fiber-reinforced plastic sheet 30 is wound around the metal tubular column 10, the resin 40 protrudes to at least one of the upper and lower ends of the fiber-reinforced plastic sheet 30.
次に、図２（ａ）及び図２（ｂ）に示すように、金属管柱１０の塗布部分に繊維強化プラスチックシート３０が巻き付けられ、樹脂４０を接着剤として繊維強化プラスチックシート３０が金属管柱１０に接着される。
このとき、繊維強化プラスチックシート３０の巻き付けにおいて、繊維３１の長さ方向が金属管柱１０の高さ方向と略一致するようにされることが好ましい。巻き付け作業を容易に行うことができるからである。
本実施形態では、巻き付け後、繊維強化プラスチックシート３０における複数の繊維３１間からは樹脂４０がはみ出て存在する。なお、複数の繊維３１間から樹脂４０をはみ出させず、巻き付け後に塗布する後述の樹脂４１が複数の繊維３１間に入り込むようにすることもできる。
Next, as shown in FIGS. 2 (a) and 2 (b), the fiber reinforced plastic sheet 30 is wound around the coated portion of the metal tubular column 10, and the fiber reinforced plastic sheet 30 is a metal tube using the resin 40 as an adhesive. It is bonded to the pillars 10.
At this time, in winding of the fiber reinforced plastic sheet 30, it is preferable that the longitudinal direction of the fibers 31 be substantially coincident with the height direction of the metal tubular column 10. This is because the winding operation can be easily performed.
In the present embodiment, after the winding, the resin 40 protrudes from among the plurality of fibers 31 in the fiber reinforced plastic sheet 30. Alternatively, the resin 40 may be applied between the plurality of fibers 31 without causing the resin 40 to protrude from among the plurality of fibers 31 and to be applied after the winding.
上記巻き付けは、金属管柱１０の全周を繊維強化プラスチックシート３０が覆うように、つまり、繊維強化プラスチックシート３０において長手方向（繊維３１の並ぶ方向）における両端部が略一致するようにすることが好ましい。金属管柱１０の全周を均一に補強できるからである。 The winding is performed so that the fiber reinforced plastic sheet 30 covers the entire circumference of the metal tubular column 10, that is, both ends in the longitudinal direction (the direction in which the fibers 31 are aligned) in the fiber reinforced plastic sheet 30 substantially coincide. Is preferred. This is because the entire circumference of the metal tubular column 10 can be reinforced uniformly.
次に、図２（ｃ）に示すように、繊維強化プラスチックシート３０の表面に液状の樹脂４１が塗布され、繊維強化プラスチックシート３０の表面が樹脂４１により被覆され、保護される。この樹脂４１の被覆による保護により、補強箇所の耐候性を向上できる。 Next, as shown in FIG. 2C, the liquid resin 41 is applied to the surface of the fiber reinforced plastic sheet 30, and the surface of the fiber reinforced plastic sheet 30 is covered with the resin 41 and protected. The protection by the coating of the resin 41 can improve the weather resistance of the reinforced portion.
このとき、繊維強化プラスチックシート３０の全面で確実に樹脂４１が塗布されるように、繊維強化プラスチックシート３０の上端及び下端からはみ出るように、樹脂４１が塗布されることが好ましい。 At this time, it is preferable that the resin 41 be applied so as to protrude from the upper end and the lower end of the fiber reinforced plastic sheet 30 so that the resin 41 is surely applied on the entire surface of the fiber reinforced plastic sheet 30.
なお、上記金属管柱１０の補強方法において、プライマーとしての樹脂と、接着剤としての樹脂４０と、被覆材としての樹脂４１とは、主剤及び硬化剤の混合比を変えた２液混合の同じ樹脂により構成することができる。例えば、プライマーとしての樹脂、樹脂４０及び４１はエポキシ樹脂を用いることができる。 In the method of reinforcing metal tubular column 10, the resin as the primer, the resin 40 as the adhesive, and the resin 41 as the covering material are the same as in the two-component mixing in which the mixing ratio of the main agent and the curing agent is changed. It can be made of resin. For example, as a resin as a primer and the resins 40 and 41, an epoxy resin can be used.
以上のように、本実施形態の金属管柱１０の補強方法は、外周面に腐食部１１を持つ金属管柱１０を補強する方法であって、金属管柱１０の腐食部１１を除去する除去工程（図１（ｃ））を含む。そして、同補強方法は、さらに、除去が行われた除去部１３の周辺部に液状の樹脂４０を塗布する第１塗布工程（図２（ａ））を含む。そして、同補強方法は、さらに、樹脂を含ませた複数の棒状の繊維３１をシート状に並べて構成される可撓性の繊維強化プラスチックシート３０を、除去部１３を覆うように金属管柱１０に巻き付け、液状の樹脂４０を介して繊維強化プラスチックシート３０を金属管柱１０に接着する接着工程（図２（ａ）及び図２（ｂ））を含む。そして、同補強方法は、さらに、金属管柱１０に接着された繊維強化プラスチックシート３０の表面に液状の樹脂４１を塗布する第２塗布工程（図２（ｃ））を含む。 As described above, the reinforcing method of the metal pipe column 10 of the present embodiment is a method of reinforcing the metal pipe column 10 having the corrosion portion 11 on the outer peripheral surface, and removing the corrosion portion 11 of the metal pipe column 10 Includes a step (FIG. 1 (c)). And the same reinforcement method further includes the 1st application process (Drawing 2 (a)) which applies liquid resin 40 to the peripheral part of removal part 13 where removal was performed. Then, in the same reinforcing method, the metal pipe post 10 is formed so that the flexible fiber reinforced plastic sheet 30 configured by arranging in a sheet form a plurality of rod-like fibers 31 containing a resin is covered. And a bonding step (FIGS. 2A and 2B) for bonding the fiber reinforced plastic sheet 30 to the metal tubular column 10 through the liquid resin 40. As shown in FIG. Then, the reinforcing method further includes a second application step (FIG. 2C) in which the liquid resin 41 is applied to the surface of the fiber reinforced plastic sheet 30 bonded to the metal tubular column 10.
このような構成により、可撓性の繊維強化プラスチックシート３０を金属管柱１０に巻き付けて金属管柱１０の補強を行うため、特許文献１のように、金属管柱１０の大きさに応じた大きさの部材を用意する必要がない。従って、特許文献１と比較して、汎用性の高い金属管柱１０の補強方法を提供することができる。 According to such a configuration, the flexible fiber reinforced plastic sheet 30 is wound around the metal pipe column 10 to reinforce the metal pipe column 10, so according to the size of the metal pipe column 10 as in Patent Document 1. There is no need to prepare a member of a size. Therefore, compared with patent document 1, the reinforcement method of the metal tube pillar 10 with high versatility can be provided.
また、本実施形態の金属管柱１０の補強方法の接着工程では、複数の棒状の繊維３１が金属管柱１０の周方向に並び、かつ、棒状の繊維３１の長さ方向が金属管柱１０の高さ方向と略一致するように、繊維強化プラスチックシート３０が金属管柱１０に巻き付けられる。 Further, in the bonding step of the reinforcing method of the metal pipe column 10 of the present embodiment, the plurality of rod-like fibers 31 are arranged in the circumferential direction of the metal pipe column 10 and the length direction of the rod-like fiber 31 is the metal pipe column 10 The fiber reinforced plastic sheet 30 is wound around the metal tube pillar 10 so as to substantially coincide with the height direction of the metal tube pillar 10.
このような構成により、金属管柱１０がより折れ曲がり難くなるように繊維強化プラスチックシート３０を金属管柱１０に巻き付けることができ、金属管柱１０を強固に補強することができる。
また、本実施形態の金属管柱１０の補強構造は、上記金属管柱１０の補強方法によって、金属管柱１０の表面に棒状の繊維３１が接着された構造であって、腐食部１１を持っていた金属管柱１０が強固に補強されている。
（変形例）
With such a configuration, the fiber-reinforced plastic sheet 30 can be wound around the metal pipe column 10 so that the metal pipe column 10 is less likely to bend, and the metal pipe column 10 can be strongly reinforced.
Further, the reinforcing structure of the metal pipe column 10 of the present embodiment has a structure in which the rod-like fibers 31 are adhered to the surface of the metal pipe column 10 by the reinforcing method of the metal pipe column 10 and has the corrosion portion 11 The metal tube column 10 that has been used is firmly reinforced.
(Modification)
次に、本実施形態の変形例に係る金属管柱１０の補強方法について、図３を用いて説明する。以下、上記実施形態の金属管柱１０の補強方法と異なる点を中心に説明する。
図３は、本変形例に係る金属管柱１０の補強方法を説明するための斜視図である。
Next, the reinforcement method of the metal pipe column 10 which concerns on the modification of this embodiment is demonstrated using FIG. Hereinafter, points different from the reinforcing method of the metal tubular column 10 of the above embodiment will be mainly described.
FIG. 3: is a perspective view for demonstrating the reinforcement method of the metal tube pillar 10 which concerns on this modification.
本変形例の金属管柱１０の補強方法が上記実施形態の金属管柱１０の補強方法と異なる点は、繊維強化プラスチックシート３０が金属管柱１０に巻き付けられた後で繊維強化プラスチックシート３０の表面を樹脂４１で被覆する前に、繊維強化プラスチックシート３０の上から金属管柱１０にバンド５０を巻き付ける点である。それ以外の構成は、上記実施形態に係る金属管柱１０の補強方法と同じである。 The method of reinforcing the metal pipe column 10 of the present modification differs from the method of reinforcing the metal pipe column 10 of the above embodiment in that the fiber reinforced plastic sheet 30 is wound on the metal pipe column 10 and then the fiber reinforced plastic sheet 30 is produced. Before covering the surface with the resin 41, the band 50 is wound around the metal tubular column 10 from the top of the fiber reinforced plastic sheet 30. The other configuration is the same as the method of reinforcing the metal pipe column 10 according to the above embodiment.
バンド５０は、可撓性の針金、金属バンド又は樹脂バンド等である。バンド５０は、金属管柱１０に巻き付けた後、巻き付け状態を固定することにより使用される。 The band 50 is a flexible wire, a metal band, a resin band or the like. The band 50 is used by fixing the winding state after winding around the metal tubular column 10.
本変形例の金属管柱１０の補強方法では、まず、図２（ａ）及び図２（ｂ）に示すように、樹脂４０を接着剤として金属管柱１０に繊維強化プラスチックシート３０が巻き付けられる。 In the reinforcing method of the metal pipe column 10 of the present modification, first, as shown in FIGS. 2A and 2B, the fiber reinforced plastic sheet 30 is wound around the metal pipe column 10 using the resin 40 as an adhesive. .
次に、図３（ａ）及び図３（ｂ）に示すように、繊維強化プラスチックシート３０を金属管柱１０の外周面に押さえ付けるように、繊維強化プラスチックシート３０の上から金属管柱１０にバンド５０が巻き付けられる。本実施形態において、同じ構成のバンド５０が２つ用意され、一方が繊維強化プラスチックシート３０の上部を押さえ付け、他方が繊維強化プラスチックシート３０の下部を押さえ付けるように金属管柱１０に巻き付けられている。 Next, as shown in FIGS. 3 (a) and 3 (b), the metal tube pillar 10 is placed on the fiber reinforced plastic sheet 30 so as to press the fiber reinforced plastic sheet 30 against the outer peripheral surface of the metal tube pillar 10. The band 50 is wound around. In the present embodiment, two bands 50 having the same configuration are prepared, and one is wound on the metal tubular column 10 so as to hold the upper portion of the fiber reinforced plastic sheet 30 and the other hold the lower portion of the fiber reinforced plastic sheet 30. ing.
このとき、バンド５０の巻き付けは、繊維強化プラスチックシート３０の隣り合う繊維３１の隙間に樹脂４０が押し出される強さで行われる。これにより、繊維３１と金属管柱１０との間だけでなく、複数の繊維３１の間にも押し出された樹脂４０が存在するようになるため、繊維強化プラスチックシート３０をより強固に金属管柱１０に接着することができる。 At this time, the winding of the band 50 is performed with such a strength that the resin 40 is pushed into the gap between the adjacent fibers 31 of the fiber reinforced plastic sheet 30. As a result, since the extruded resin 40 is present not only between the fibers 31 and the metal tubular column 10 but also between the plurality of fibers 31, the fiber reinforced plastic sheet 30 can be made more rigid. It can be glued to ten.
次に、図３（ｃ）に示すように、バンド５０及び繊維強化プラスチックシート３０の表面に液状の樹脂４１が塗布され、バンド５０及び繊維強化プラスチックシート３０の表面が樹脂４１により被覆され、保護される。この樹脂４１の被覆による保護により、補強箇所の耐候性を向上できる。 Next, as shown in FIG. 3C, the liquid resin 41 is applied to the surfaces of the band 50 and the fiber reinforced plastic sheet 30, and the surfaces of the band 50 and the fiber reinforced plastic sheet 30 are covered with the resin 41 to protect Be done. The protection by the coating of the resin 41 can improve the weather resistance of the reinforced portion.
以上のように、本変形例の金属管柱１０の補強方法は、接着工程（図２（ａ）及び図２（ｂ））と第２塗布工程（図３（ｃ））との間に、繊維強化プラスチックシート３０の表面において金属管柱１０にバンド５０を巻き付け、繊維強化プラスチックシート３０を金属管柱１０に押さえ付ける押さえ付け工程（図３（ａ）及び図３（ｂ））を含む。 As mentioned above, the reinforcement method of the metal tube pillar 10 of this modification is between the adhesion process (FIG. 2 (a) and FIG. 2 (b)), and the 2nd application process (FIG. 3 (c)), A band 50 is wound around the metal tubular column 10 on the surface of the fiber reinforced plastic sheet 30, and a pressing process (FIGS. 3A and 3B) is performed to press the fiber reinforced plastic sheet 30 against the metallic tubular column 10.
このような構成により、バンド５０の巻き付けにより、金属管柱１０における樹脂４０が塗布された部分に繊維強化プラスチックシート３０を強く押さえ付けることができるため、繊維強化プラスチックシート３０をより強固に金属管柱１０に接着することができる。 With such a configuration, the fiber reinforced plastic sheet 30 can be strongly pressed to the portion of the metal tubular column 10 to which the resin 40 is applied by winding the band 50, so the fiber reinforced plastic sheet 30 can be made more rigid. It can be glued to the pillars 10.
また、繊維強化プラスチックシート３０の金属管柱１０への押さえ付けをローラやコテ等で行う場合と比較し、巻き付けという非常に簡易な方法で行うことができる。このような簡易な押さえ付け方法は、金属管柱１０の下端部付近に繊維強化プラスチックシート３０を巻き付ける必要のある金属管柱１０の補強方法において非常に有用であることは言うまでもない。 Further, as compared with the case where the fiber reinforced plastic sheet 30 is pressed to the metal tubular column 10 with a roller, iron or the like, it can be performed by a very simple method of winding. It goes without saying that such a simple pressing method is very useful in a method of reinforcing the metal tube pillar 10 in which the fiber reinforced plastic sheet 30 needs to be wound around the lower end portion of the metal tube pillar 10.
以上、本発明の金属管柱の補強方法及び補強構造について、実施形態に基づいて説明したが、本発明は、この実施形態に限定されるものではない。本発明の要旨を逸脱しない範囲内で当業者が思いつく各種変形を施したものも本発明の範囲内に含まれる。 As mentioned above, although the reinforcement method and reinforcement structure of a metal tube pillar of the present invention were explained based on an embodiment, the present invention is not limited to this embodiment. It is within the scope of the present invention to apply various modifications that those skilled in the art would think within the scope of the present invention.
例えば、上記実施形態において、接着工程では繊維強化プラスチックシート３０を金属管柱に巻き付けるとした。しかし、繊維強化プラスチックシート３０を構成する樹脂を含ませた棒状の繊維３１の１本又は複数本を、除去部１３を跨ぐように金属管柱１０の表面に配置し、液状の樹脂４０を介して棒状の繊維３１を金属管柱１０に接着し、金属管柱１０に接着された棒状の繊維３１の表面に液状の樹脂４１を塗布してもよい。
また、上記実施形態において、除去工程では、腐食部１１の除去が行われて有底凹部が除去部１３として形成され、第１塗布工程では、有底凹部つまり除去により新たに表面に露出した露出部とその周辺部とに液状の樹脂４０が塗布されるとした。しかし、腐食部１１が金属管柱１０の管厚み方向の深くまで達しており、腐食部１１の除去により金属管柱１０の管内部に達する貫通孔が形成される場合には、貫通孔が除去部１３として形成されるため、第１塗布工程では、除去部１３の周辺部にのみ液状の樹脂４０が塗布されてもよい。
また、上記実施形態において、１つの繊維強化プラスチックシート３０を金属管柱１０の周方向に巻き付けるとした。しかし、繊維強化プラスチックシート３０を複数のシートに分割し、分割したシートを金属管柱１０の周方向に並べて配置し金属管柱１０に接着して施工性を向上させてもよい。
また、上記実施形態において、繊維強化プラスチックシート３０を一層だけ金属管柱１０に配置し接着するとした。しかし、金属管柱１０に接着された繊維強化プラスチックシート３０の上にさらに繊維強化プラスチックシート３０を積層させて配置し、金属管柱１０に接着された繊維強化プラスチックシート３０に接着させ、補強強度を向上させてもよい。
For example, in the above embodiment, in the bonding step, the fiber reinforced plastic sheet 30 is wound around the metal tubular column. However, one or more of the rod-like fibers 31 containing the resin constituting the fiber-reinforced plastic sheet 30 are disposed on the surface of the metal tubular column 10 so as to straddle the removal portion 13, and the liquid resin 40 is interposed. The rod-like fibers 31 may be bonded to the metal tubular column 10, and the liquid resin 41 may be applied to the surface of the rod-like fibers 31 bonded to the metal tubular column 10.
In the above embodiment, in the removal step, the corroded portion 11 is removed to form a bottomed recess as the removal portion 13, and in the first application step, the bottomed recess, that is, the exposure newly exposed on the surface by removal It is assumed that the liquid resin 40 is applied to the portion and the periphery thereof. However, if the corroded portion 11 reaches deep in the pipe thickness direction of the metal pipe column 10 and the removal of the corroded portion 11 forms a through hole reaching the inside of the pipe of the metal pipe column 10, the through hole is removed Since the portion 13 is formed, the liquid resin 40 may be applied only to the periphery of the removal portion 13 in the first application step.
Further, in the above embodiment, one fiber reinforced plastic sheet 30 is wound in the circumferential direction of the metal tubular column 10. However, the fiber-reinforced plastic sheet 30 may be divided into a plurality of sheets, and the divided sheets may be arranged in the circumferential direction of the metal pipe column 10 and bonded to the metal pipe column 10 to improve the workability.
Further, in the above embodiment, only one layer of the fiber reinforced plastic sheet 30 is disposed and adhered to the metal tubular column 10. However, the fiber reinforced plastic sheet 30 is further laminated and disposed on the fiber reinforced plastic sheet 30 bonded to the metal tubular column 10, and is bonded to the fiber reinforced plastic sheet 30 bonded to the metal tubular pillar 10, and the reinforcing strength is obtained. May be improved.
本発明は、金属管柱の補強方法等において広く利用することができる。 The present invention can be widely used in, for example, a method of reinforcing a metal tubular column.
１０ 金属管柱
１１ 腐食部
１２ ベースプレート
１３ 除去部
２０ 地表面
２１ 掘削部
３０ 繊維強化プラスチックシート
３１ 棒状の繊維
３２ 連結部材
４０、４１ 液状の樹脂
５０ バンド
DESCRIPTION OF SYMBOLS 10 metal pipe column 11 corrosion part 12 base plate 13 removal part 20 ground surface 21 excavation part 30 fiber reinforced plastic sheet 31 rod-like fiber 32 connection member 40, 41 liquid resin 50 band
Claims (5)
前記金属管柱の腐食部を除去する除去工程と、
前記除去が行われた除去部の周辺部に液状の樹脂を塗布する第１塗布工程と、
樹脂を含ませることで曲げ強度を向上し、長さ方向で形状が変化し難いようにした棒状の繊維を、前記除去部としての有底凹部または貫通孔における空間を跨ぐように前記金属管柱の表面に配置し、前記塗布された液状の樹脂を介して前記棒状の繊維を前記金属管柱に接着する接着工程と、
前記金属管柱に接着された前記棒状の繊維の表面に液状の樹脂を塗布する第２塗布工程とを含む
金属管柱の補強方法。 A method of reinforcing a metal pipe column having a corroded portion on the outer peripheral surface,
Removing the corroded portion of the metal pipe column;
A first application step of applying a liquid resin to a peripheral portion of the removed portion subjected to the removal;
Improved bending strength in Rukoto impregnated with resin, the rod-like fibers to shape hardly changes in the length direction, the metal tube so as to straddle the space in the bottomed recess or through hole of the said removal unit Bonding on the surface of the column and bonding the rod-like fiber to the metal pipe column via the applied liquid resin;
And a second applying step of applying a liquid resin to the surface of the rod-like fiber bonded to the metal tubular column.
前記第２塗布工程では、前記金属管柱に接着された前記繊維強化プラスチックシートの表面に液状の樹脂を塗布する
請求項１に記載の金属管柱の補強方法。 In the bonding step, a flexible fiber-reinforced plastic sheet configured by arranging a plurality of rod-like fibers in a sheet form is wound around the metal pipe column, and the fiber-reinforced plastic sheet is applied via the applied liquid resin. Glued to the metal tube column,
The method according to claim 1, wherein a liquid resin is applied to the surface of the fiber-reinforced plastic sheet bonded to the metal pipe column in the second application step.
請求項２に記載の金属管柱の補強方法。 In the bonding step, the plurality of rod-like fibers are arranged in the circumferential direction of the metal pipe column, and the length direction of the rod-like fiber substantially matches the height direction of the metal pipe column The method for reinforcing a metal pipe column according to claim 2, wherein a reinforced plastic sheet is wound around the metal pipe column.
前記接着工程と前記第２塗布工程との間に、前記繊維強化プラスチックシートの表面において前記金属管柱にバンドを巻き付け、前記繊維強化プラスチックシートを前記金属管柱に押さえ付ける押さえ付け工程を含む
請求項２または３に記載の金属管柱の補強方法。 The reinforcing method of the metal pipe post further includes
Between the bonding step and the second application step, there is included a pressing step of winding a band around the metal tubular column on the surface of the fiber reinforced plastic sheet and pressing the fiber reinforced plastic sheet against the metal tubular column. The reinforcement method of the metal tube pillar as described in claim 2 or 3.
金属管柱の補強構造。 The reinforcing structure of a metal pipe post according to any one of claims 1 to 4, wherein the rod-like fibers are bonded to the surface of the metal pipe post.
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| JP6378255B2 (en) * | 2016-06-18 | 2018-08-22 | 株式会社 新倉技研 | Column reinforcing method and column coated with coating resin material |
| JP6846147B2 (en) * | 2016-09-27 | 2021-03-24 | 積水化学工業株式会社 | Reinforcement or repair method of stepped support and stepped support that has been reinforced or repaired |
| JP6422089B2 (en) * | 2018-04-12 | 2018-11-14 | 株式会社 新倉技研 | Column reinforcing method and column coated with coating resin material |
| WO2023080133A1 (en) * | 2021-11-04 | 2023-05-11 | 恵和株式会社 | Structure protection sheet and method for protecting surface of structure |
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| US6519909B1 (en) * | 1994-03-04 | 2003-02-18 | Norman C. Fawley | Composite reinforcement for support columns |
| JPH09177333A (en) * | 1995-12-22 | 1997-07-08 | Mitsubishi Rayon Co Ltd | Reinforced fiber sheet and method for repairing-reinforcing structure using the same sheet |
| JP3312202B2 (en) * | 1999-12-06 | 2002-08-05 | 株式会社末広レジン工業所 | Heavy-corrosion protection for existing steel plate columns and method of repair |
| JP3488191B2 (en) * | 2000-09-14 | 2004-01-19 | 三井住友建設株式会社 | Reinforcing method for the root of concrete electric pole |
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