JP4069064B2

JP4069064B2 - Steel tube column reinforcing method and reinforcing material placement aid

Info

Publication number: JP4069064B2
Application number: JP2003401952A
Authority: JP
Inventors: 博保皆吉; 正人後山; 充彦三輪
Original assignee: エヌ・ティ・ティ・インフラネット株式会社; 通信土木コンサルタント株式会社
Priority date: 2003-12-01
Filing date: 2003-12-01
Publication date: 2008-03-26
Anticipated expiration: 2023-12-01
Also published as: JP2005163336A

Description

本発明は、中空部を有する既設の鋼管柱を補強するための鋼管柱の補強方法および補強材配置用補助具に関する。 The present invention relates to a steel pipe column reinforcing method for reinforcing an existing steel pipe column having a hollow portion, and a reinforcing material arranging auxiliary tool.

表面に亜鉛メッキが施された鋼板から構成される鋼管柱は、その上部に通信用のアンテナ等を設置するためなどに用いられている。この鋼管柱は、軽量で輸送が容易な上、立設も簡単なため、上記以外にもさまざまな用途に利用されている（例えば非特許文献１を参照）。
ＫＵＲＥＪＢＣ，“技術講座（伝送−１）３．線路構造物３.２架空構造物（１）電柱と支線”、[online]、平成１４年９月１６日、[平成１５年１１月２８日検索]、インターネット＜ＵＲＬ：http://www.kurejbc.com/technical/technical-6.htm＞ A steel pipe column composed of a steel plate with a galvanized surface is used for installing a communication antenna or the like on the upper part thereof. Since this steel pipe column is light and easy to transport and is easy to stand, it is used for various purposes other than the above (see, for example, Non-Patent Document 1).
KURE JBC, “Technical Course (Transmission-1) 3. Line Structures 3.2 Aerial Structures (1) Telephone Pole and Branch Lines”, [online], September 16, 2002, [November 28, 2003] Search], Internet <URL: http://www.kurejbc.com/technical/technical-6.htm>

しかしながら、上述した鋼管柱は、風雨等の気象条件の厳しい立設場所などでは、強度的に十分でない場合もあり、補修等にコストがかかってしまう恐れもあった。 However, the above-described steel pipe columns may not be sufficient in strength in a standing place where weather conditions such as wind and rain are severe, and there is a risk that repair and the like may be costly.

本発明は、このような事情に鑑みてなされたものであり、その目的は、既設の鋼管柱の強度を容易にかつ経済的に増加させることのできる鋼管柱の補強方法および補強材配置用補助具を提供することにある。 The present invention has been made in view of such circumstances, and an object of the present invention is to provide a steel pipe column reinforcing method and a reinforcing material arranging auxiliary capable of easily and economically increasing the strength of an existing steel pipe column. It is in providing tools.

上記目的を達成するために、請求項１記載の発明は、既設の鋼管柱の側面の少なくとも鉛直方向の位置が異なる二つの領域に第１および第２の開口部を形成する工程と、この工程で形成した二つの開口部のうち鉛直方向下側に位置する第１の開口部から、補強材としての複数の棒状部材の各々について、各棒状部材の上端となる端部を中空部上方へ向けてそれぞれ挿入し、この挿入した端部を鉛直方向上側に位置する前記第２の開口部から外部へ抜き出して前記棒状部材の他端部が中空部に入るまで引き上げ、その後前記第２の開口部から外部に抜き出していた端部を再度中空部内に戻すことにより、前記複数の棒状部材を中空部へ挿入する工程と、この工程で挿入した複数の棒状部材の各々を貫通する複数の貫通部を備えると共に、この貫通部のなす貫通面とは垂直な方向に伸縮自在な複数のロッドが設けられて成る補強材配置用補助具を、前記複数のロッド先端を通過する円の径が最小の状態で前記中空部に挿入し、前記複数の貫通部の各々に前記複数の棒状部材を貫通させる工程と、前記複数の棒状部材の各々の上端に締結されるワイヤをそれぞれ懸吊する複数の懸吊部が等間隔に配置される補強材懸吊用治具を前記第２の開口部に固定し、該補強材懸吊用治具の複数の懸吊部に前記複数のワイヤのそれぞれを貫通させて、当該ワイヤを緊張状態で前記複数の棒状部材を中空部内で均等に懸吊する工程と、前記補強材配置用補助具に設けられる複数のロッドの各先端が鋼管柱内壁面に当接するまで前記複数のロッドを伸長する工程と、固化した後も収縮しない無収縮モルタルを前記第２の開口部から中空部内の当該第２の開口部下端付近に達するまで注入する工程と、前記第１および第２の開口部付近の外周に、略鉛直または略水平方向に所定の耐力を有する複数のアラミド繊維シートを貼付する工程と、この工程で貼付したアラミド繊維シートの外周に鉄板またはフッ素塗料から成る防護部を設ける工程とを有することを特徴とする。 In order to achieve the above object, the invention described in claim 1 includes a step of forming first and second openings in two regions having different positions in the vertical direction on the side surface of an existing steel pipe column, and this step. From the first opening located on the lower side in the vertical direction among the two openings formed in the above, with respect to each of the plurality of rod-shaped members as the reinforcing material, the end portion serving as the upper end of each rod-shaped member is directed upward of the hollow portion. Are inserted, and the inserted end is pulled out from the second opening located on the upper side in the vertical direction and pulled up until the other end of the rod-shaped member enters the hollow portion, and then the second opening. The step of inserting the plurality of rod-shaped members into the hollow portion by returning the end portion extracted from the outside to the hollow portion again, and the plurality of penetration portions penetrating each of the plurality of rod-shaped members inserted in this step As well as A reinforcing material arranging auxiliary tool comprising a plurality of rods that can be expanded and contracted in a direction perpendicular to the through surface formed by the portion is formed in the hollow portion with a diameter of a circle passing through the tip of the plurality of rods being minimized. Inserting the plurality of bar-like members through each of the plurality of through- holes, and a plurality of suspension parts for respectively suspending wires fastened to the upper ends of the plurality of bar-like members at equal intervals A reinforcing material suspension jig to be disposed is fixed to the second opening, and each of the plurality of wires is passed through a plurality of suspension portions of the reinforcement material suspension jig. The step of suspending the plurality of rod-shaped members uniformly in the hollow portion in a tension state, and the plurality of rods until the tips of the plurality of rods provided on the reinforcing material arranging auxiliary tool abut on the inner wall surface of the steel pipe column Elongation process and non-shrink mortar that does not shrink after solidification The implanting to reach the vicinity of the second opening lower end of the hollow portion from the second opening, the the first and second outer circumference of the vicinity of the opening, a substantially vertical or a predetermined strength in a substantially horizontal direction And a step of providing a protective part made of an iron plate or a fluorine paint on the outer periphery of the aramid fiber sheet attached in this step.

本発明における「鋼管柱」は、通常の鋼管柱に加えて、鋼板組立柱や複合柱も含むものとする。 The “steel pipe column” in the present invention includes a steel plate assembly column and a composite column in addition to a normal steel tube column.

請求項２記載の発明は、既設の鋼管柱の補強を行うに際して、既設の鋼管柱の補強を行うに際して、当該鋼管柱の中空部に挿入される補強材としての複数の棒状部材を中空部内で配置する鋼管柱の補強材配置用補助具であって、円管形状をなすフレーム部と、前記複数の棒状部材の各々を貫通するために前記フレーム部の外周に等間隔に設けられる複数の貫通部と、前記フレーム部の円管形状の断面をなす円の径方向に対して放射状に伸縮自在であり、なおかつ前記円の中心を通り当該円のなす面と垂直な方向を指向する直線を対称軸として回転対称に、かつ前記貫通部と重ならない異なる位置に設けられる複数のロッドとを備え、前記鋼管柱中空部に挿入され、前記対称軸が鉛直方向を指向するように配置された後、前記複数のロッドの先端部が鋼管柱中空部の内壁面に当接するまで伸長されて位置が固定されることを特徴とする。 According to the second aspect of the present invention, when reinforcing an existing steel pipe column, when reinforcing an existing steel pipe column, a plurality of rod-shaped members as reinforcing members inserted into the hollow portion of the steel pipe column are provided in the hollow portion. A steel pipe column reinforcing material arranging auxiliary tool, which is a circular pipe-shaped frame part and a plurality of penetrations provided at equal intervals on the outer periphery of the frame part to penetrate each of the plurality of rod-shaped members And a straight line that is radially expandable and contractable with respect to the radial direction of a circle that forms a circular tube-shaped cross section of the frame portion, and that passes through the center of the circle and that is perpendicular to the surface formed by the circle. A plurality of rods that are rotationally symmetric as axes and are provided at different positions that do not overlap the penetrating part , inserted into the steel pipe column hollow part, and arranged so that the symmetric axis is oriented in the vertical direction; The tip of the plurality of rods Part position is extended until it abuts against the inner wall surface of the steel pipe column hollow portion, characterized in that it is fixed.

本発明によれば、鋼管柱を補強する補強材を、補強材懸吊用治具および補強材配置用補助具を利用して鋼管柱の中空部内に均等に配置することにより、既設の鋼管柱の強度を容易にかつ経済的に増加させることができる。 According to the present invention, the reinforcing material for reinforcing the steel pipe column is arranged evenly in the hollow portion of the steel pipe column by using the reinforcing material suspension jig and the reinforcing material arranging auxiliary tool. Can be easily and economically increased.

以下、添付図面を参照して本発明の実施の形態を説明する。なお、以後の説明においては、亜鉛メッキを施した鋼板を材料として台形円筒状に成形される構成部材を繋ぎ合わせて１本の柱をなす鋼板組立柱（パンザーマスト）への適用を主に想定するが、本発明が適用される鋼管柱はそれに限られるわけではなく、亜鉛メッキ鋼板を円筒状に成形した通常の鋼管柱や、コンクリート台上に亜鉛メッキ処理鋼柱または表面耐候性塗装鋼柱を取り付けた構造を有する複合柱などを含むものであることはいうまでもない。 Embodiments of the present invention will be described below with reference to the accompanying drawings. In the following description, it is assumed that the present invention is mainly applied to a steel plate assembly column (panzer mast) that forms a single column by joining components formed into a trapezoidal cylindrical shape using a galvanized steel plate as a material. However, the steel pipe column to which the present invention is applied is not limited thereto, and a normal steel pipe column formed of a galvanized steel plate in a cylindrical shape, a galvanized steel column or a surface weather-resistant coated steel column on a concrete base. Needless to say, it includes a composite pillar having an attached structure.

図１は、本発明の一実施形態に係る鋼管柱の補強方法の処理の流れを示すフローチャート図である。 FIG. 1 is a flowchart showing a processing flow of a steel pipe column reinforcing method according to an embodiment of the present invention.

まず、電動サンダー等を用いることにより、鋼管柱１側面の少なくとも鉛直方向の位置が異なる二つの領域の各々に開口部を形成する（ステップＳ１）。 First, by using an electric sander or the like, an opening is formed in each of two regions having different positions in the vertical direction on the side surface of the steel pipe column 1 (step S1).

図２は、本実施形態に係る補強方法が適用される鋼管柱１に対して二つの開口部１１および１３を設けたときの状態を示す説明図である。同図に示すように、鋼管柱１はテーパ形状をなしており、この鋼管柱１を構成する鋼管の板厚はたかだか３ｍｍ程度（より具体的には２.１〜２.８ｍｍ程度）である。 FIG. 2 is an explanatory diagram showing a state when two openings 11 and 13 are provided in the steel pipe column 1 to which the reinforcing method according to the present embodiment is applied. As shown in the figure, the steel pipe column 1 has a tapered shape, and the thickness of the steel pipe constituting the steel pipe column 1 is about 3 mm (more specifically, about 2.1 to 2.8 mm). .

二つの開口部１１および１３は、鋼管柱１の側面で両者が互いに鉛直方向上下に位置するように設けられる。二つの開口部は略長方形または略楕円形をなしており、端部が電動ドリルまたはルータによって滑らか（な曲線）に仕上げられている。このうち下側に位置する開口部１１（第１の開口部）は、水平方向の径が４〜５ｃｍ程度、鉛直方向の径が５０ｃｍ程度である。これに対して上側に位置する開口部１３（第２の開口部）は、水平方向の径は開口部１１とほぼ同じであるが、鉛直方向の径は開口部１１よりも若干小さく、４０ｃｍ程度であれば好ましい。 The two openings 11 and 13 are provided on the side surface of the steel pipe column 1 so that both are positioned vertically above and below each other. The two openings have a substantially rectangular shape or a substantially oval shape, and the ends are finished smoothly (smooth curve) by an electric drill or a router. Among these, the opening 11 (first opening) located on the lower side has a horizontal diameter of about 4 to 5 cm and a vertical diameter of about 50 cm. On the other hand, the opening 13 (second opening) located on the upper side has a horizontal diameter substantially the same as the opening 11, but the vertical diameter is slightly smaller than the opening 11 and is about 40 cm. Is preferable.

鋼管柱１の長手方向（立設時の鉛直方向）の全長が２２ｍ程度（より具体的には２２.３６ｍ）の場合、根入れ長が２.５ｍ程度であり、開口部１１の下端は地際から２.５ｍ程度上部に位置するように設けられる。また、開口部１３の下端は、地際から６.０ｍ程度となるように設けられる。 When the total length of the steel pipe column 1 in the longitudinal direction (vertical direction when standing) is about 22 m (more specifically, 22.36 m), the penetration length is about 2.5 m, and the lower end of the opening 11 is the ground. It is provided so as to be located about 2.5m above the distance. Moreover, the lower end of the opening part 13 is provided so that it may become about 6.0 m from the ground.

次に、ステップＳ１で形成された開口部１１および１３を用いて鋼管柱１の中空部に補強材を挿入・配置する工程を説明する。 Next, a process of inserting and arranging a reinforcing material in the hollow portion of the steel pipe column 1 using the openings 11 and 13 formed in step S1 will be described.

まず、補強材としての複数の棒状部材を二つの開口部１１および１３を用いて中空部へ挿入する（ステップＳ２）。 First, a plurality of rod-shaped members as reinforcing materials are inserted into the hollow portion using the two openings 11 and 13 (step S2).

本実施形態において補強材の一部をなす各棒状部材は、その径が１５〜１７ｍｍ程度のアラミドロッド８１の下端部に、アラミドロッド８１と略同径を有する１または２個の異型鉄筋９１を、一端を揃えた上で、各中心軸が短手方向に一直線上に並ぶように配置し、それらをタイラップ等の結束部材を用いてほう縛して構成される。ちなみに、全長２２ｍ程度の鋼管柱１に適用する場合、アラミドロッド８１の全長は８.０〜９.０ｍ程度、より好ましくは８.５ｍ程度である。また、異型鉄筋の全長は、０.７〜０.８ｍ程度である。他の全長を有する鋼管柱の場合にも、アラミドロッド８１の鋼管柱全長に対する比率はほぼ同じである。 In this embodiment, each rod-shaped member forming a part of the reinforcing member has one or two deformed reinforcing bars 91 having substantially the same diameter as the aramid rod 81 at the lower end portion of the aramid rod 81 having a diameter of about 15 to 17 mm. After arranging one end, the central axes are arranged so as to be aligned in a straight line in the short direction, and they are bound using a binding member such as a tie wrap. Incidentally, when applied to the steel pipe column 1 having a total length of about 22 m, the total length of the aramid rod 81 is about 8.0 to 9.0 m, more preferably about 8.5 m. The total length of the deformed reinforcing bars is about 0.7 to 0.8 m. In the case of steel pipe columns having other overall lengths, the ratio of the aramid rod 81 to the total length of the steel pipe columns is substantially the same.

本実施形態においては、中空部挿入時に上端が開口部１３付近に達する程度に長いアラミドロッド８１を用いるので、まず下側に位置する開口部１１からアラミドロッド８１の上端となる端部を中空部上方へ向けて挿入し、その端部を開口部１３から鋼管柱１の外部へ一旦抜き出し、異型鉄筋９１がほう縛されている方の端部（下端）が開口部１１を介して中空部内に入るまでさらに上方に引き上げる。下端が中空部に入ったら、開口部１３から鋼管柱１外部に出ていた上端を再び中空部内に戻す。このようにして全ての棒状部材を挿入すれば、全長が長いアラミドロッド８１から構成される棒状部材であっても、それほど高い位置まで持ち上げる必要がなくなるので、クレーン等の大掛かりな装置を用いなくて済む。 In this embodiment, since the aramid rod 81 that is long enough to reach the vicinity of the opening 13 when the hollow portion is inserted is used, first, the end serving as the upper end of the aramid rod 81 is opened from the opening 11 located on the lower side to the hollow portion. Inserted upward, the end is once extracted from the opening 13 to the outside of the steel pipe column 1, and the end (lower end) to which the deformed reinforcing bar 91 is bound is inserted into the hollow part via the opening 11. Pull up further until it enters. If a lower end enters a hollow part, the upper end which had come out of the steel pipe pillar 1 from the opening part 13 will be returned in a hollow part again. If all the rod-like members are inserted in this manner, even if the rod-like member is composed of the aramid rod 81 having a long overall length, it is not necessary to lift it to a very high position, so a large apparatus such as a crane has to be used. That's it.

なお、アラミドロッド８１を外部から牽引、操作するために、本実施形態では、異型鉄筋９１がほう縛されていない方の端部（上端）にワイヤ５を締結し、このワイヤ５を鋼管柱１外部から牽引する。ワイヤのアラミドロッド８１への締結に際しては、アルミ等から成るワイヤ締結部８７を装着し、このワイヤ締結部８７にワイヤ５を締結するが、ワイヤ締結法は必ずしもこれに限られるわけではない。 In addition, in order to pull and operate the aramid rod 81 from the outside, in this embodiment, the wire 5 is fastened to the end (upper end) where the deformed reinforcing bar 91 is not bound, and this wire 5 is connected to the steel pipe column 1. Tow from outside. When the wire is fastened to the aramid rod 81, a wire fastening portion 87 made of aluminum or the like is attached and the wire 5 is fastened to the wire fastening portion 87, but the wire fastening method is not necessarily limited to this.

続いて、各アラミドロッド８１に締結されるワイヤ５を貫通部でそれぞれ貫通する補強材配置用補助具７０を開口部１３から中空部へ挿入し、中空部内を所定の位置まで下降させる（ステップＳ３）。 Subsequently, the reinforcing material arranging auxiliary tool 70 that penetrates the wire 5 fastened to each aramid rod 81 at the penetration portion is inserted from the opening portion 13 into the hollow portion, and the inside of the hollow portion is lowered to a predetermined position (step S3). ).

図３は、補強材配置用補助具６０の詳細な構成を示す斜視図である。この補強材配置用補助具６０は鉄等から構成され、高さの低い円管形状をなすフレーム部６３の外周に、アラミドロッド８１を貫通可能なＵ字形状の貫通部６１が、中空部に挿入される棒状部材の本数分具備されている。隣接する貫通部６１の先端同士がフレーム部６３の円管形状の断面をなす円の中心に対して図３で水平方向になす角度は４５度となる。なお、図３に示すのはあくまでも一例であり、他の本数（４本、５本、６本、７本、９本、１０本、１１本、１２本、・・・等）を貫通可能な補強材配置用補助具を同様に構成することも勿論可能である。 FIG. 3 is a perspective view showing a detailed configuration of the reinforcing material arranging auxiliary tool 60. This reinforcing material arranging auxiliary tool 60 is made of iron or the like, and a U-shaped penetrating portion 61 capable of penetrating the aramid rod 81 is formed in a hollow portion on the outer periphery of a frame portion 63 having a low circular tube shape. The number of rod-shaped members to be inserted is provided. The angle formed in the horizontal direction in FIG. 3 with respect to the center of a circle in which the tips of the adjacent through portions 61 form a circular cross section of the frame portion 63 is 45 degrees. 3 is merely an example, and other numbers (4, 5, 6, 7, 9, 10, 11, 12, 12, etc.) can be penetrated. Of course, it is possible to configure the reinforcing material arranging aid in the same manner.

ところで、円形を成すフレーム部６３には、補強材配置用補助具６０の中空部への挿入および取り出しを行うために、ワイヤ７を用いて懸吊可能な孔部６５が設けられている。図３では、この孔部６５が３つの場合を示しているが、孔部６５の個数に関しても必ずしも３個に限られるわけではなく、治具の重量等に応じて４個や５個にすることもできる。なお、全長２２ｍの鋼管柱の場合には、この補強材配置用補助具６０の外径は０.４０ｍ程度である。 By the way, the circular frame portion 63 is provided with a hole portion 65 that can be suspended using the wire 7 in order to insert and remove the reinforcing material arranging auxiliary tool 60 into and from the hollow portion. FIG. 3 shows a case where the number of the hole portions 65 is three, but the number of the hole portions 65 is not necessarily limited to three, and may be four or five depending on the weight of the jig. You can also In the case of a steel pipe column having a total length of 22 m, the outer diameter of the reinforcing material arranging auxiliary tool 60 is about 0.40 m.

図４は、このステップＳ３が終了した時点で中空部内で補強材配置用補助具６０の状態を示す斜視図である。同図に示すように、補強材配置用補助具６０は、ワイヤ７によって懸吊されており、各貫通部６１にアラミドロッド８１が貫通されている。 FIG. 4 is a perspective view showing a state of the reinforcing material arranging auxiliary tool 60 in the hollow portion when step S3 is completed. As shown in the figure, the reinforcing material arranging auxiliary tool 60 is suspended by the wire 7, and an aramid rod 81 is penetrated through each through portion 61.

次に、補強材配置用補助具７０を開口部１３から中空部に挿入し、各貫通部にアラミドロッドを貫通し、中空部内の所定の位置まで下降させる（ステップＳ４）。 Next, the reinforcing material arranging auxiliary tool 70 is inserted into the hollow portion from the opening portion 13, the aramid rod is passed through each through portion, and lowered to a predetermined position in the hollow portion (step S <b> 4).

図５は、このステップで用いる補強材配置用補助具７０（ロッドつき補強材配置用補助具）の構成を示す斜視図である。同図に示す補強材配置用補助具７０は、上述した補強材配置用補助具６０と同一の径および構成を有する補助具部分のフレーム部７３に対して、補助具自身の中空部内における位置を固定する位置固定部７７が、取付部７９を介して取り付けられることによって構成されている。 FIG. 5 is a perspective view showing a configuration of a reinforcing material arranging auxiliary tool 70 (a reinforcing material arranging auxiliary tool with a rod) used in this step. The reinforcing material arranging auxiliary tool 70 shown in the figure has a position in the hollow portion of the auxiliary tool itself with respect to the frame portion 73 of the auxiliary tool portion having the same diameter and configuration as the reinforcing material arranging auxiliary tool 60 described above. A position fixing portion 77 to be fixed is configured by being attached via an attachment portion 79.

位置固定部７７は、正三角柱形状の腕支持部７７１がフレーム部７３の断面をなす円の中心に配置されており、三つの同じ長さの腕部７７２がフレーム部７３のなす円に平行な面に放射状に等方的に広がる三股形状をなしている。ここで等方的に広がるとは、隣接する腕部が１２０度の角度をなすと共に同じ長さだけ外側に広がっている状態を意味する。換言すれば、フレーム部７３のなす円の中心を通過し当該円のなす面と垂直な方向を指向する直線を対称軸として１２０度回転対称に設けられる。各腕部７７２にはロッド７７４が内蔵されており、その先端部付近は蛇腹７７５による被覆部分を介してフレーム部７３の外周方向に突出している。 In the position fixing portion 77, an equilateral triangular prism-shaped arm support portion 771 is arranged at the center of a circle forming a cross section of the frame portion 73, and three arm portions 772 having the same length are parallel to the circle formed by the frame portion 73. It has a three-pronged shape that spreads radially and isotropically on the surface. Here, “isotropically spreading” means a state in which adjacent arm portions form an angle of 120 degrees and spread outward by the same length. In other words, it is provided in a 120-degree rotational symmetry with a straight line passing through the center of the circle formed by the frame portion 73 and pointing in a direction perpendicular to the surface formed by the circle as a symmetry axis. A rod 774 is built in each arm portion 772, and the vicinity of the tip portion protrudes in the outer peripheral direction of the frame portion 73 through a covering portion by a bellows 775.

図５では、ロッド７７４の先端部に円管が装着されているが、この円管は必ずしも装着する必要はない。このロッド７７４は、腕部７７２に設けられる加圧部７７３を介して外部からコンプレッサー等の加圧手段（図示せず）によって加えられる空気圧により、腕部７７２内部においてピストンの如く移動自在な構成、すなわちフレーム部７３のなす円の径方向に伸縮自在な構成を有している。このため、外部からの加圧によってロッド７７４が更に突出し、図６に示すような状態に達する。このとき、三つのロッド７７４はほぼ同じ速さで移動する。 In FIG. 5, a circular tube is attached to the tip of the rod 774, but this circular tube does not necessarily have to be attached. The rod 774 is configured to be movable like a piston inside the arm portion 772 by air pressure applied from the outside by a pressurizing means (not shown) such as a compressor through a pressurizing portion 773 provided on the arm portion 772. That is, it has a configuration that can expand and contract in the radial direction of the circle formed by the frame portion 73. For this reason, the rod 774 protrudes further by pressurization from the outside, and reaches a state as shown in FIG. At this time, the three rods 774 move at substantially the same speed.

なお、このステップＳ４では、図５に示すように各ロッド７７４が縮んだ状態（各ロッド７７４の先端を通過する円の径が最小となる状態）にしておき、配置する。 In step S4, as shown in FIG. 5, the rods 774 are placed in a contracted state (a state in which the diameter of a circle passing through the tip of each rod 774 is minimized) and arranged.

その後、各アラミドロッド８１を補強材懸吊用治具２０および３０を用いて懸吊する（ステップＳ５）。より具体的にはアラミドロッド８１を補強材懸吊用治具２０および３０を用いて懸吊する一方で、中空部内の補強材配置用補助具６０をワイヤ７を用いて適宜移動させることにより、８個の棒状部材を中空部内で均等に配置する。ここで補強材配置用補助具６０の位置は、アラミドロッド８１の中間部付近に移動される。 Thereafter, each aramid rod 81 is suspended using the reinforcing material suspension jigs 20 and 30 (step S5). More specifically, by hanging the aramid rod 81 using the reinforcing material hanging jigs 20 and 30, while appropriately moving the reinforcing material arranging auxiliary tool 60 in the hollow portion using the wire 7, Eight rod-shaped members are evenly arranged in the hollow portion. Here, the position of the reinforcing material arranging auxiliary tool 60 is moved to the vicinity of the middle portion of the aramid rod 81.

図８および図９は、棒状部材を８個挿入したときに、これらの棒状部材を懸吊して中空部内部で位置を固定して配置するために用いられる補強材懸吊用治具２０および３０の構成をそれぞれ示す斜視図である。 FIG. 8 and FIG. 9 show a reinforcing material suspension jig 20 that is used to suspend these rod-shaped members when the eight rod-shaped members are inserted and to fix the positions inside the hollow portion, and It is a perspective view which shows the structure of 30 each.

図８に示す補強材懸吊用治具２０（第１の補強材懸吊用治具）は異型鉄筋製であり、ワイヤ５を支持して補強材の中空部内での位置を固定する円弧型の補強材固定部２２と、この補強材固定部２２の外周に沿って所定箇所溶接されて成り、中空部内に配置するとき鋼管柱１の内壁面に当接する円弧型の当接部２３と、この当接部２３に連結され、補強材固定部２２および当接部２３を支持する支持部２１とを備える。 The reinforcing material hanging jig 20 (first reinforcing material hanging jig) shown in FIG. 8 is made of a deformed reinforcing bar, and supports the wire 5 and fixes the position of the reinforcing material in the hollow portion. The reinforcing material fixing portion 22 and an arc-shaped abutting portion 23 that is welded at a predetermined location along the outer periphery of the reinforcing material fixing portion 22 and abuts against the inner wall surface of the steel pipe column 1 when disposed in the hollow portion. A support member 21 connected to the contact portion 23 and supporting the reinforcing material fixing portion 22 and the contact portion 23 is provided.

補強材固定部２２は、アラミドロッド８１上端に締結されたワイヤ５を懸吊して支持するための開口面（通し穴）を有し、鋼管柱１外部から加える張力によってワイヤ７が緊張したときに、補強材をなす各棒状部材の中空部内での位置を固定するための複数の懸吊部２４が、隣接する懸吊部間の距離が等しくなるように溶接等によって設けられている。図８では懸吊部２４を４個設けた場合を示しているが、これは一例に過ぎず、懸吊部２４の数は鋼管柱１の直径等の条件によって、例えば５個、６個、７個、・・・とすることもできる。また、図８において、懸吊部２４の開口面は円形を成しているが、これもあくまで一例に過ぎず、その他の形状、例えば楕円形あるいは方形等であってもかまわない。さらに、懸吊部２４の内側面に超硬合金を焼きバメ等によって被覆することにより、懸吊部２４自体の強度を増加させることも可能である。 The reinforcing material fixing portion 22 has an opening surface (through hole) for suspending and supporting the wire 5 fastened to the upper end of the aramid rod 81, and when the wire 7 is tensioned by the tension applied from the outside of the steel pipe column 1 In addition, a plurality of suspension portions 24 for fixing the positions of the respective rod-shaped members constituting the reinforcing material in the hollow portion are provided by welding or the like so that the distances between the adjacent suspension portions are equal. Although FIG. 8 shows a case where four suspension parts 24 are provided, this is only an example, and the number of suspension parts 24 is, for example, five, six, etc. depending on conditions such as the diameter of the steel pipe column 1. It can also be set to 7 pieces. In FIG. 8, the opening surface of the suspension portion 24 is circular, but this is only an example, and other shapes such as an ellipse or a rectangle may be used. Furthermore, it is possible to increase the strength of the suspension part 24 itself by coating the inner surface of the suspension part 24 with a cemented carbide or the like by shrinkage.

当接部２３は、肉厚が薄く上下のテーパが比較的急な鋼管柱１内壁面との間にスペースを確保するために設けられたものであり、棒状部材を懸吊したときに、中空部下端部付近で棒状部材を均等に配置することが可能になる。また、補強材固定部２２と合わせて二重円弧形状にすることにより、中空部に挿入する部分を構成する鉄筋の径を小さくとることができ、治具自体の軽量化を図ることもできる。 The contact portion 23 is provided to secure a space between the inner wall surface of the steel pipe column 1 having a thin wall thickness and a relatively steep upper and lower taper, and is hollow when the rod-like member is suspended. It becomes possible to arrange | position a rod-shaped member equally in the vicinity of a part lower end part. Further, by forming a double arc shape together with the reinforcing material fixing portion 22, the diameter of the reinforcing bar constituting the portion inserted into the hollow portion can be reduced, and the jig itself can be reduced in weight.

支持部２１は、懸吊部２４から外部へ露出するワイヤ５を通して外部からの張力を加えやすくするための通し穴２５、補強材懸吊用治具２０を操作自在にして中空部への挿入を容易にする機能を有する治具操作部２６、棒状部材を懸吊したときに、後述する補強材懸吊用治具３０を上部に載置するための載置部２７ａおよび２７ｂを備えている。載置部の数は、図８に示したように２個（２７ａ、２７ｂ）である必要はなく、その上部に載せて支持する治具の重量や支持部２１の長さ等に応じて３個、４個、５個、・・・と複数個設けることも可能である。 The support portion 21 can be inserted into the hollow portion by making the through hole 25 and the reinforcing material suspension jig 20 easy to apply the tension from the outside through the wire 5 exposed from the suspension portion 24 to the outside. A jig operating part 26 having a function for facilitating and placing parts 27a and 27b for placing a reinforcing material hanging jig 30 described later on the upper part when the rod-like member is suspended are provided. As shown in FIG. 8, the number of mounting portions does not need to be two (27a, 27b). It is also possible to provide a plurality of pieces, four pieces, five pieces,.

ここで、支持部２１をなす鉄筋の径および通し穴２５の厚み（補強材固定部２２の円弧が通過する平面と垂直な方向の長さ）は開口部１３から挿入できるように設定される。具体的には、開口部１３の短手方向の径が４〜５ｃｍの場合、支持部２１の鉄筋の径が１５〜２０ｍｍ程度、通し穴２５の厚みが２０〜２４ｍｍ程度であれば好ましい。 Here, the diameter of the reinforcing bar constituting the support portion 21 and the thickness of the through hole 25 (length in a direction perpendicular to the plane through which the arc of the reinforcing material fixing portion 22 passes) are set so as to be inserted from the opening portion 13. Specifically, when the diameter of the opening 13 in the short direction is 4 to 5 cm, it is preferable that the diameter of the reinforcing bar of the support portion 21 is about 15 to 20 mm and the thickness of the through hole 25 is about 20 to 24 mm.

なお、図８からも明らかなように、支持部２１は、当接部２３の円弧の中点から若干ずれた位置に接合されている。このように補強材懸吊用治具２０が支持部２１に対して非対称な形状をなしている理由は、支持部２１を境として弧の長さが長い方の円弧部分を先に開口部１１から中空部に挿入すれば、残りの円弧部分の弧の長さが短いため全体を挿入しやすくすることができるからである。 As is clear from FIG. 8, the support portion 21 is joined to a position slightly deviated from the midpoint of the arc of the contact portion 23. The reason why the reinforcing material suspension jig 20 has an asymmetric shape with respect to the support portion 21 is that the opening portion 11 starts with the arc portion having the longer arc length from the support portion 21 as a boundary. This is because the entire arc can be easily inserted because the arc length of the remaining arc portion is short.

図９に示す補強材懸吊用治具３０（第２の補強材懸吊用治具）も異型鉄筋製であり、補強材懸吊用治具２０と同様に、ワイヤ５を支持して補強材である複数の棒状部材を固定する補強材固定部３２と、当接部３３と、補強材固定部３２を支持する支持部３１とを備える。 The reinforcing material hanging jig 30 (second reinforcing material hanging jig) shown in FIG. 9 is also made of a different type of reinforcing bar, and supports and reinforces the wire 5 like the reinforcing material hanging jig 20. A reinforcing material fixing portion 32 that fixes a plurality of rod-shaped members that are members, a contact portion 33, and a support portion 31 that supports the reinforcing material fixing portion 32 are provided.

円弧型の補強材固定部３２に対して、ワイヤ５を通す開口面を有する複数の懸吊部３４が設けられている。この懸吊部３４の数が必ずしも図９に示した４個である必要がない点、および開口面の形状が円形に限られるものではない点、および懸吊部３４の開口部内側面に超硬合金を用いて強度を向上させることができる点は、補強材懸吊用治具２０の場合と同様である。 A plurality of suspension portions 34 having an opening surface through which the wire 5 passes are provided to the arc-shaped reinforcing material fixing portion 32. The number of the suspending portions 34 is not necessarily four as shown in FIG. 9, the shape of the opening surface is not limited to a circle, and the inner surface of the opening portion of the suspending portion 34 is made of carbide. The point which can improve an intensity | strength using an alloy is the same as that of the case of the jig | tool 20 for reinforcing material suspension.

また、図９からも明らかなように、支持部３１は、当接部３３をなす円弧の中点から若干ずれた位置に接合されているが、これも補強材懸吊用治具２０の支持部２１で説明したのと同様の理由、すなわち弧の長さが長い方を開口部１３から先に中空部に挿入すれば、残りの円弧部分の弧の長さが短いため挿入しやすくなるためである。 As is clear from FIG. 9, the support portion 31 is joined at a position slightly deviated from the midpoint of the arc forming the contact portion 33, which is also supported by the reinforcing material suspension jig 20. For the same reason as described for the portion 21, that is, if the longer arc length is inserted into the hollow portion first from the opening portion 13, the arc length of the remaining arc portion is short, so that it is easy to insert. It is.

さらに、通し穴３５、治具操作部３６、上述した補強材懸吊用治具３０での対応部位（下１桁が同じ）とそれぞれ同じ機能を有していることはいうまでもない。なお、支持部３１は、中空部内で補強材懸吊用治具２０の載置部２７ａ、２７ｂに載置されることになるため、補強材懸吊用治具３０自身は載置部を具備していない。 Furthermore, it goes without saying that the corresponding portions (the same as the last one digit) of the through hole 35, the jig operating portion 36, and the above-described reinforcing material suspension jig 30 have the same functions. In addition, since the support part 31 will be mounted in the mounting parts 27a and 27b of the reinforcing material hanging jig 20 within the hollow part, the reinforcing material hanging jig 30 itself has a mounting part. Not done.

以上説明した補強材懸吊用治具２０および３０を用いる場合、棒状部材を合計８個挿入することになるので、懸吊部２４および３４は、隣接する懸吊部同士が４５度の角度をなすように等間隔に補強材固定部２２および３２に溶接等によりそれぞれ設けられる。通し穴２５および３５には、それぞれ懸吊部２４および３４の個数分の穴、すなわちここでは４つずつの通し穴が設けられており、アラミドロッド８１の上部に設けられ、アラミドロッド８１を含む棒状部材を懸吊するワイヤ５をアラミドロッド８１に締結するワイヤ締結部８７に締結されたワイヤ５が、各通し穴の異なる開口部をそれぞれ貫通することによって、鋼管柱１の外部に延出するワイヤ５同士が絡み合うのを防止することができる。 When the reinforcing material suspension jigs 20 and 30 described above are used, a total of eight rod-shaped members are inserted, so that the suspension portions 24 and 34 have an angle of 45 degrees between adjacent suspension portions. As formed, the reinforcing material fixing portions 22 and 32 are provided at equal intervals by welding or the like. The through holes 25 and 35 are each provided with holes corresponding to the number of the suspension portions 24 and 34, that is, four through holes in this case. The through holes 25 and 35 are provided above the aramid rod 81 and include the aramid rod 81. The wire 5 fastened to the wire fastening portion 87 that fastens the wire 5 that suspends the rod-like member to the aramid rod 81 extends outside the steel pipe column 1 by passing through different openings of each through hole. It is possible to prevent the wires 5 from being entangled with each other.

ちなみに、補強材固定部２２および３２を構成する鉄筋の径は１６ｍｍ程度、当接部２３および３３を構成する鉄筋の径は１０ｍｍ程度である。また、上述した全長を有する鋼管柱１（全長２２ｍ程度）に適用する場合には、当接部２３および３３の円弧の直径が４０ｃｍ程度であることが望ましい。 Incidentally, the diameter of the reinforcing bars constituting the reinforcing material fixing portions 22 and 32 is about 16 mm, and the diameter of the reinforcing bars constituting the contact portions 23 and 33 is about 10 mm. Moreover, when applying to the steel pipe pillar 1 which has the full length mentioned above (about 22 m in total length), it is desirable that the diameter of the circular arc of the contact parts 23 and 33 is about 40 cm.

ところで、補強材懸吊用治具２０および３０の支持部２１および３１の軸心方向の全長は、支持部２１および３１の長さを適宜調節することによって、上記範囲の中で最適な長さを有する治具を構成することができる。例えば、補強材懸吊用治具２０が６５０〜１０２０ｍｍ、補強材懸吊用治具３０が８５０〜１２２０ｍｍ程度である。 By the way, the total length in the axial direction of the support portions 21 and 31 of the reinforcing material suspension jigs 20 and 30 is an optimum length within the above range by appropriately adjusting the length of the support portions 21 and 31. The jig | tool which has can be comprised. For example, the reinforcing material hanging jig 20 is about 650 to 1020 mm, and the reinforcing material hanging jig 30 is about 850 to 1220 mm.

なお、中空部に挿入される補強材懸吊用治具２０および３０において、中空部に挿入される部分を支持部２１および３１からそれぞれ着脱自在な構成にすることも勿論可能である。 In addition, in the reinforcing material suspension jigs 20 and 30 inserted into the hollow part, it is of course possible to make the parts inserted into the hollow part detachable from the support parts 21 and 31, respectively.

続いて、以上の構成を有する補強材懸吊用治具２０および３０の開口部１１から中空部への具体的な挿入法について説明する。 Next, a specific method for inserting the reinforcing material hanging jigs 20 and 30 having the above-described configuration from the opening 11 into the hollow portion will be described.

まず、補強材懸吊用治具２０を中空部へ挿入するが、その際には、補強材固定部２２および当接部２３のなす円弧を含む面（円弧面）を鉛直面に平行になるようにし、当接部２３をなす円弧のうち支持部２１を境に弧の長さの長い方を下にする。この段階では、支持部２１の軸心方向は、水平方向よりも若干傾斜した方向を指向している。その後、下にした方の円弧部分、すなわち支持部２１を境にして弧の長さの長い方の円弧部分をまず中空部に挿入した後、支持部２１の軸心が水平方向を指向するように回転し、残りの部分（弧の長さの短い円弧部分）を挿入する。通し穴２５まで中空部に挿入した後、支持部２１の指向方向（水平方向）を固定して当該方向を回転軸として円弧面を９０度回転させる（その際には治具操作部２６をレバーとして利用）。この結果、円弧面は水平方向と平行になる。この状態で支持部２１を鋼管柱１の外部へ引くと、当接部２３が鋼管内壁面に当接する。後は、補強材懸吊用治具２０をそのまま鉛直下向きに開口部１１の下端に当接するまで下降させることによって位置決めを行う。 First, the reinforcing material suspension jig 20 is inserted into the hollow portion. At this time, the surface (arc surface) including the arc formed by the reinforcing material fixing portion 22 and the contact portion 23 is parallel to the vertical surface. Thus, of the arcs forming the abutting portion 23, the longer arc length is set downward with the support portion 21 as a boundary. At this stage, the axial direction of the support portion 21 is oriented in a direction slightly inclined from the horizontal direction. After that, the lower arc portion, that is, the arc portion having the longer arc length with respect to the support portion 21 is first inserted into the hollow portion, and then the axis of the support portion 21 is oriented in the horizontal direction. And insert the remaining part (arc part with a short arc length). After inserting the hollow portion up to the through hole 25, the orientation direction (horizontal direction) of the support portion 21 is fixed, and the arc surface is rotated 90 degrees with the direction as a rotation axis (in this case, the jig operation portion 26 is moved to the lever). Used as). As a result, the arc surface becomes parallel to the horizontal direction. When the support part 21 is pulled outside the steel pipe column 1 in this state, the contact part 23 comes into contact with the inner wall surface of the steel pipe. After that, positioning is performed by lowering the reinforcing material suspension jig 20 as it is vertically downward until it comes into contact with the lower end of the opening 11.

この後、補強材懸吊用治具３０を中空部へ挿入する。この場合にも、補強材固定部３２および当接部３３のなす円弧を含む平面（円弧面）を鉛直面に平行になるようにし、補強材懸吊用治具２０の場合と同様に、まず支持部３１を境として弧の長さの長い方の円弧部分を挿入し、支持部３１の軸心が水平方向を指向するように回転させつつ残りの円弧部分を中空部に挿入し、通し穴３５を中空部に挿入した後、支持部３１が指向する方向を回転軸として円弧面を９０度回転させる（ここでも治具操作部３６を適宜利用）。この状態で支持部３１を中空部の内部に押し出すと、補強材固定部３２が中空部の開口部１１と対向する外周部の内壁面に当接する。そして、補強材固定部３２を内壁面に当接させたまま鉛直下向きに下降させていき、補強材懸吊用治具２０の載置部２７ａおよび２７ｂに支持部３１を載置する。 Thereafter, the reinforcing material suspension jig 30 is inserted into the hollow portion. Also in this case, the plane including the arc formed by the reinforcing material fixing portion 32 and the abutting portion 33 (arc surface) is made parallel to the vertical surface, and as in the case of the reinforcing material suspension jig 20, The arc portion having the longer arc length is inserted with the support portion 31 as a boundary, and the remaining arc portion is inserted into the hollow portion while rotating so that the axial center of the support portion 31 is oriented in the horizontal direction. After 35 is inserted into the hollow portion, the arc surface is rotated 90 degrees with the direction in which the support portion 31 is directed as the rotation axis (again, the jig operation portion 36 is used as appropriate). When the support portion 31 is pushed out into the hollow portion in this state, the reinforcing material fixing portion 32 comes into contact with the inner wall surface of the outer peripheral portion facing the opening portion 11 of the hollow portion. Then, the reinforcing material fixing portion 32 is lowered vertically while being in contact with the inner wall surface, and the support portion 31 is placed on the placement portions 27 a and 27 b of the reinforcing material hanging jig 20.

図１０は、補強材懸吊用治具２０および３０を用いてワイヤ５を外側に牽引して緊張させた後、各補強材懸吊用治具を上述したように鋼管柱１に対して固定し、アラミドロッド８１を中空部内で懸吊したときの開口部１３付近の中空部内の状態を示す斜視図である。同図に示すように、補強材懸吊用治具２０の懸吊部２４をそれぞれ貫通した４本のワイヤ５は、通し穴２５を通過する。そして、支持部２１に適宜設けられる突起部等に金具を用いてワイヤ５を固着することにより、ワイヤ５の緊張状態を保つ。補強材懸吊用治具３０を介してアラミドロッド８１を懸吊するワイヤ５も同様にして通し穴３５を通過させ、適宜支持部３１に対して固定する。この際、載置部２７ａおよび２７ｂには、中空部から通し穴２５または３５を介して外部に延出しているワイヤ５を貫通するための開口部（通し穴２５または３５と同じく鉛直方向に開口を形成）を設けることによって、ワイヤ５を束ねる機能を加えておく（図８および図９もあわせて参照）。 FIG. 10 shows that the reinforcing member suspension jigs 20 and 30 are used to pull and tension the wire 5 to the outside, and then each reinforcing member suspension jig is fixed to the steel pipe column 1 as described above. And it is a perspective view which shows the state in the hollow part of the opening part 13 vicinity when the aramid rod 81 is suspended in a hollow part. As shown in the figure, the four wires 5 that respectively penetrate the suspension portions 24 of the reinforcing material suspension jig 20 pass through the through holes 25. And the tension | tensile_strength state of the wire 5 is maintained by adhering the wire 5 to the protrusion part etc. which are suitably provided in the support part 21 using metal fittings. Similarly, the wire 5 that suspends the aramid rod 81 through the reinforcing material suspending jig 30 passes through the through hole 35 and is fixed to the support portion 31 as appropriate. At this time, the mounting portions 27a and 27b are provided with openings for penetrating the wires 5 extending from the hollow portions to the outside through the through holes 25 or 35 (open in the vertical direction as with the through holes 25 or 35). The function of bundling the wires 5 is added (see also FIGS. 8 and 9).

なお、補強材懸吊用治具２０および３０同士についても、両支持部２１および３１を連結する連結部材を用いて互いに固定しておけばさらに好ましい。 It is more preferable that the reinforcing material hanging jigs 20 and 30 are also fixed to each other using a connecting member that connects both the support portions 21 and 31.

以上、詳細に説明したステップＳ５の後、補強材配置用補助具７０の位置固定部７７を作動することによって、各ロッド７７４が中空部の内壁面に当接するまで伸長し、補強材配置用補助具７０の位置を中空部内で固定する（ステップＳ６）。この際には、各棒状部材に締結されるワイヤ５を外部から牽引して棒状部材を若干上昇させて「宙吊り」にしておく。このようにしておくことでロッド７７４の作動がよりスムーズになる。 As described above, after step S5 described in detail, by operating the position fixing portion 77 of the reinforcing material arranging auxiliary tool 70, each rod 774 extends until it comes into contact with the inner wall surface of the hollow portion, and the reinforcing material arranging auxiliary device The position of the tool 70 is fixed in the hollow portion (step S6). At this time, the wire 5 fastened to each rod-like member is pulled from the outside to slightly raise the rod-like member to be “suspended in the air”. By doing so, the operation of the rod 774 becomes smoother.

図７は、補強材配置用補助具７０を中空部内で所定の高さまで下降させた後、上述したように加圧してロッド７７４が鋼管柱１の内壁面に当接したときの状況を示す斜視図である。同図においても、加圧手段については省略している。各ロッド７７４は、腕支持部７７１に近い方の加圧部７７３から空気圧が加えられることによってほぼ同じ速さで伸長していくので、そのロッド７７４の先端が中空部の内壁面に到達して当接したとき、中空部内を開口部１３付近から見ると、腕支持部７７１が中空部水平面をなす円の中心に来るようになる。したがって、貫通部７１を貫通するアラミドロッド８１は、隣接するアラミドロッド８１間の距離（軸心の間隔）が全て等しくなるように配置される、すなわち中空部内において「均等に」配置されることになる。 FIG. 7 is a perspective view showing the situation when the rod 774 comes into contact with the inner wall surface of the steel pipe column 1 by lowering the reinforcing material arranging auxiliary tool 70 to a predetermined height in the hollow portion and then applying pressure as described above. FIG. Also in the figure, the pressurizing means is omitted. Each rod 774 extends at almost the same speed by applying air pressure from the pressurizing portion 773 closer to the arm support portion 771, so that the tip of the rod 774 reaches the inner wall surface of the hollow portion. When contacted, when the inside of the hollow portion is viewed from the vicinity of the opening 13, the arm support portion 771 comes to the center of a circle forming the hollow portion horizontal plane. Accordingly, the aramid rods 81 penetrating through the penetration part 71 are arranged so that the distances between the adjacent aramid rods 81 (spacing between the axial centers) are all equal, that is, “evenly” arranged in the hollow part. Become.

このステップＳ６が終了した後、ワイヤ５を用いて各棒状部材を再び中空部最下面に載置する（ステップＳ７）。図１１に、このステップ施工後の鋼管柱１の中空部内の概略構成を示す。 After this step S6 is completed, each rod-like member is again placed on the lowermost surface of the hollow portion using the wire 5 (step S7). In FIG. 11, the schematic structure in the hollow part of the steel pipe pillar 1 after this step construction is shown.

その後、無収縮モルタル１００を開口部１１の下端付近に達するまで注入し、開口部１１を鉄板等を用いて塞ぐ（ステップＳ８）。このステップでは、補強材配置用補助具６０を中空部に残置する場合を想定しているが、無収縮モルタル１００を注入しながら補強材配置用補助具６０を徐々に上昇させて開口部１３から抜き出すことも勿論可能である。 Thereafter, the non-shrink mortar 100 is injected until it reaches the vicinity of the lower end of the opening 11, and the opening 11 is closed with an iron plate or the like (step S8). In this step, it is assumed that the reinforcing material arranging auxiliary tool 60 is left in the hollow portion, but the reinforcing material arranging auxiliary tool 60 is gradually raised while injecting the non-shrinkable mortar 100 so that the reinforcing material arranging auxiliary tool 60 is opened from the opening 13. It is of course possible to extract it.

無収縮モルタル１００がある程度固化した時点で、補強材懸吊用治具２０および３０を開口部から抜き出す（ステップＳ９）。この際には、補強材懸吊用治具２０および３０を挿入してワイヤ５を固定するときの操作と逆の手順の操作をそれぞれ行うことにより、中空部に挿入していた部分を外部へ抜き出す。その後、外部へ露出しているワイヤ５を切断し、余った部分は中空部へ挿入するなどにより残置する。 When the non-shrink mortar 100 is solidified to some extent, the reinforcing material hanging jigs 20 and 30 are extracted from the opening (step S9). At this time, by inserting the reinforcing material hanging jigs 20 and 30 and fixing the wire 5 respectively, the operation reverse to the operation is performed, so that the portion inserted in the hollow portion is brought to the outside. Extract. Thereafter, the wire 5 exposed to the outside is cut, and the remaining part is left by inserting it into the hollow part.

続いて、補強材配置用補助具７０のロッド７７４に加えていた空気圧を解除してロッド７７４を中空部挿入時の状態(図５を参照)に戻し、開口部１３から抜き出す（ステップＳ１０）。ここでの解除の際には、腕支持部７７１から遠い方の加圧部７７３に空気を送り込み、腕支持部７７１に近い方の加圧部７７３から空気を抜くようにする方法があるが、必ずしもこれに限られるわけではない。 Subsequently, the air pressure applied to the rod 774 of the reinforcing material arranging auxiliary tool 70 is released, the rod 774 is returned to the state when the hollow portion is inserted (see FIG. 5), and is extracted from the opening 13 (step S10). At the time of release here, there is a method in which air is sent to the pressurizing part 773 far from the arm support part 771 and air is extracted from the pressurization part 773 closer to the arm support part 771. It is not necessarily limited to this.

ステップＳ１０の後、開口部１３から無収縮モルタル１００を注入する。このステップでは、開口部１３の下端付近に達するまで注入する（ステップＳ１１）。 After step S <b> 10, the non-shrink mortar 100 is injected from the opening 13. In this step, the injection is performed until the vicinity of the lower end of the opening 13 is reached (step S11).

以上のステップＳ８〜Ｓ１１において、例えばステップＳ８で無収縮モルタル１００を注入しながらステップＳ９およびＳ１０の処理を同時並行的に行うことも可能である。特に、フレーム部６３の厚みを増して補強材配置用補助具６０の重量を重くした場合には、このように施工すれば施工時間の短縮化にもつながり好ましい。 In the above steps S8 to S11, for example, it is possible to perform the processes of steps S9 and S10 in parallel while injecting the non-shrink mortar 100 in step S8. In particular, when the thickness of the frame portion 63 is increased to increase the weight of the reinforcing material arranging auxiliary tool 60, it is preferable to perform the construction in this manner because the construction time can be shortened.

また、上記説明では補強材配置用補助具７０を取り出すことを前提としているが、仮に補強材配置用補助具７０を中空部に残置する場合には、開口部１１を鉄板で塞いだ後、開口部１１を鉄板等を用いて塞ぎ、開口部１３から固化した後も収縮しない無収縮モルタル１００を開口部１３の下端付近に達するまで注入する。その後、無収縮モルタル１００がある程度固化した時点で、補強材懸吊用治具２０および３０を鋼管柱１の外部へ抜き出す。なお、無収縮モルタル１００がある程度の粘性を有することに鑑みて、無収縮モルタル１００を注入した直後に補強材懸吊用治具を２０および３０を抜き出すことも可能である。 Further, in the above description, it is assumed that the reinforcing material arranging auxiliary tool 70 is taken out. However, if the reinforcing material arranging auxiliary tool 70 is left in the hollow portion, the opening 11 is closed with an iron plate and then opened. The portion 11 is closed with an iron plate or the like, and non-shrinkable mortar 100 that does not shrink after solidifying from the opening 13 is injected until it reaches the vicinity of the lower end of the opening 13. After that, when the non-shrink mortar 100 is solidified to some extent, the reinforcing material suspension jigs 20 and 30 are extracted to the outside of the steel pipe column 1. In view of the fact that the non-shrink mortar 100 has a certain degree of viscosity, it is possible to extract the reinforcing material hanging jigs 20 and 30 immediately after the non-shrink mortar 100 is injected.

この後、１日程度経過させ、アラミド繊維シートを開口部１１および１３を通過する鋼管柱１外周に貼付する（ステップＳ１２）。より具体的には、まず、開口部１１および１３付近に、幅３０ｃｍ程度で１２０ｔｆ/ｍ（１１７６ｋＮ／ｍ）の耐力を有するアラミド繊維シートを、その耐力が略鉛直方向の耐力となるように２度にわたって貼付し（２層を形成）、その後、幅１０ｃｍ程度で９０ｔｆ／ｍ（８８２ｋＮ／ｍ）の耐力を有するアラミド繊維シートを、その耐力が略水平方向の耐力となるように開口部１１および１３付近を包帯状に巻回する。この結果、開口部１１および１３の近傍では、略鉛直および略水平方向に所定の耐力を有する３層から成るアラミド繊維シートを貼付することになる。 Thereafter, after about 1 day, an aramid fiber sheet is stuck on the outer periphery of the steel pipe column 1 passing through the openings 11 and 13 (step S12). More specifically, first, an aramid fiber sheet having a width of about 30 cm and a yield strength of 120 tf / m (1176 kN / m) in the vicinity of the openings 11 and 13 is set to 2 so that the yield strength becomes a yield strength in a substantially vertical direction. Aramid fiber sheet having a width of about 10 cm and a proof stress of 90 tf / m (882 kN / m) is applied to the openings 11 and so that the proof stress is approximately horizontal. Wrap around 13 in a bandage. As a result, in the vicinity of the openings 11 and 13, an aramid fiber sheet composed of three layers having a predetermined yield strength is attached in a substantially vertical and substantially horizontal direction.

最後の工程として、アラミド繊維シートを巻回した領域の外周に、亜鉛メッキ鉄板をさらに巻回するか、またはフッ素塗料を塗布する（ステップＳ１３）。図１３は、このステップ終了時の鋼管柱１の外観を示す図であり、符号１５および１７で示す領域が亜鉛メッキ鉄板が巻回されるか、またはフッ素塗料が塗布された領域である。この工程を行うことにより、鋼管柱１の補強部分を防護するとともに、その補強部分の紫外線劣化を防止することができる。すなわち、このステップＳ１３で巻回した鉄板または塗布したフッ素塗料が防護部としての機能を有する。全長２２ｍ程度の鋼管柱１の場合、領域１５および１７は上下に１.１０ｍ程度の幅を有する。 As the last step, a galvanized iron plate is further wound or a fluorine paint is applied to the outer periphery of the region where the aramid fiber sheet is wound (step S13). FIG. 13 is a view showing the appearance of the steel pipe column 1 at the end of this step, and regions indicated by reference numerals 15 and 17 are regions where a galvanized iron plate is wound or a fluorine paint is applied. By performing this step, it is possible to protect the reinforcing portion of the steel pipe column 1 and to prevent ultraviolet deterioration of the reinforcing portion. That is, the iron plate wound in step S13 or the applied fluorine paint has a function as a protective part. In the case of the steel pipe column 1 having a total length of about 22 m, the regions 15 and 17 have a width of about 1.10 m in the vertical direction.

以上説明した本発明の一実施形態によれば、補強材懸吊用治具および補強材配置用補助具を適宜用いて鋼管柱の中空部に補強材を均等に配置することにより、既設の鋼管柱の強度を容易にかつ経済的に増加させることが可能となる。より具体的には、本実施形態に係る鋼管柱の補強方法によれば、補強前の状態に比べて１.５倍程度の強度を得ることができる。 According to one embodiment of the present invention described above, an existing steel pipe is obtained by evenly arranging the reinforcing material in the hollow portion of the steel pipe column using the reinforcing material hanging jig and the reinforcing material arranging auxiliary tool as appropriate. It is possible to increase the strength of the column easily and economically. More specifically, according to the method for reinforcing a steel pipe column according to the present embodiment, it is possible to obtain a strength about 1.5 times that of the state before reinforcement.

なお、以上の説明においては、最初にも述べたように鋼板組立柱を具体例としてあげたが、それ以外にも、亜鉛メッキ鋼板を円筒状に成形した通常の鋼管柱や、コンクリート台上に亜鉛メッキ処理鋼柱または表面耐候性塗装鋼柱を取り付けた構造を有する複合柱などに適用することも勿論可能である。 In the above description, as described above, the steel plate assembly column is given as a specific example, but in addition to that, on a normal steel tube column formed of a galvanized steel plate in a cylindrical shape or on a concrete stand Of course, the present invention can be applied to a galvanized steel column or a composite column having a structure provided with a surface weather-resistant coated steel column.

また、鋼管柱としては、円筒形に限らず、角型の鋼管柱でもよい。 Moreover, as a steel pipe pillar, not only a cylindrical form but a square-shaped steel pipe pillar may be sufficient.

このように、本発明は、特許請求の範囲に記載した発明特定事項を逸脱しない範囲内において、さまざまな実施の形態等を含み得るものである。 As described above, the present invention can include various embodiments and the like without departing from the specific matters described in the claims.

本発明の一実施形態に係る鋼管柱の補強方法の処理の流れを示すフローチャート図である。It is a flowchart figure which shows the flow of a process of the reinforcement method of the steel pipe pillar which concerns on one Embodiment of this invention. 本発明の一実施形態に係る鋼管柱の補強方法において、鋼管柱に二つの開口部を設けたときの側面図である。In the reinforcing method of a steel pipe pillar concerning one embodiment of the present invention, it is a side view when two openings are provided in a steel pipe pillar. 補強材配置用補助具の構成を示す斜視図である。It is a perspective view which shows the structure of the auxiliary member for reinforcement material arrangement | positioning. 図３の補強材配置用補助具を用いて鋼管柱中空部内にアラミドロッドを配置したときの状態を示す図である。It is a figure which shows a state when an aramid rod is arrange | positioned in the steel pipe column hollow part using the reinforcing material arrangement | positioning auxiliary tool of FIG. ロッド付き補強材配置用補助具の構成を示す斜視図である。It is a perspective view which shows the structure of the auxiliary member for reinforcement material arrangement | positioning with a rod. 図５の補強材配置用補助具においてロッドを伸長した状態を示す斜視図である。It is a perspective view which shows the state which extended | stretched the rod in the reinforcing material arrangement | positioning auxiliary tool of FIG. ロッド付き補強材配置用補助具を用いて鋼管柱中空部内にアラミドロッドを配置したときの状態を示す図である。It is a figure which shows a state when an aramid rod is arrange | positioned in the steel pipe column hollow part using the reinforcing material arrangement | positioning auxiliary tool with a rod. 第１の補強材懸吊用治具の構成を示す斜視図である。It is a perspective view which shows the structure of the 1st jig | tool for reinforcing material suspension. 第２の補強材懸吊用治具の構成を示す斜視図である。It is a perspective view which shows the structure of the 2nd jig | tool for reinforcing material suspension. 第１および第２の補強材懸吊用補助具を用いて棒状部材を懸吊したときの開口部付近の中空部内の状態を示す図である。It is a figure which shows the state in the hollow part vicinity of an opening part, when a rod-shaped member is suspended using the 1st and 2nd reinforcing material suspension auxiliary tool. 本発明の一実施形態に係る鋼管柱の補強方法において、中空部に棒状部材を挿入して均等に配置したときの概略構成を示す断面図である。It is sectional drawing which shows schematic structure when the rod-shaped member is inserted in a hollow part and arrange | positioned equally in the reinforcement method of the steel pipe pillar which concerns on one Embodiment of this invention. 本発明の一実施形態に係る鋼管柱の補強方法において、無収縮モルタルの充填が完了したときの概略構成を示す断面図である。It is sectional drawing which shows schematic structure when the filling of a non-shrink mortar is completed in the reinforcement method of the steel pipe pillar which concerns on one Embodiment of this invention. 本発明の一実施形態に係る鋼管柱の補強方法終了時の状態を示す側面図である。It is a side view which shows the state at the time of completion | finish of the reinforcement method of the steel pipe pillar which concerns on one Embodiment of this invention.

符号の説明Explanation of symbols

１鋼管柱
５、７ワイヤ
１１、１３開口部
２０、３０補強材懸吊用治具
２１、３１支持部
２２、３２補強材固定部
２３、３３当接部
２４、３４懸吊部
２５、３５通し穴
２６、３６治具操作部
２７ａ、２７ｂ、３７載置部
６０、７０補強材配置用補助具
６１、７１貫通部
６３、７３フレーム部
６５、７５孔部
７７位置固定部
７９取付部
８１アラミドロッド
９１異型鉄筋
１００無収縮モルタル
７７１腕支持部
７７２腕部
７７３加圧部
７７４ロッド
７７５蛇腹 DESCRIPTION OF SYMBOLS 1 Steel pipe pillar 5, 7 Wire 11, 13 Opening part 20, 30 Reinforcing material suspension jig | tool 21, 31 Support part 22, 32 Reinforcing material fixing | fixed part 23, 33 Contact part 24, 34 Suspension part 25, 35 Through Hole 26, 36 Jig operation part 27a, 27b, 37 Placement part 60, 70 Reinforcing material placement aid 61, 71 Through part 63, 73 Frame part 65, 75 Hole part 77 Position fixing part 79 Mounting part 81 Aramid rod 91 Atypical rebar 100 Non-shrink mortar 771 Arm support part 772 Arm part 773 Pressurization part 774 Rod 775 bellows

Claims

既設の鋼管柱の側面の少なくとも鉛直方向の位置が異なる二つの領域に第１および第２の開口部を形成する工程と、
この工程で形成した二つの開口部のうち鉛直方向下側に位置する第１の開口部から、補強材としての複数の棒状部材の各々について、各棒状部材の上端となる端部を中空部上方へ向けてそれぞれ挿入し、この挿入した端部を鉛直方向上側に位置する前記第２の開口部から外部へ抜き出して前記棒状部材の他端部が中空部に入るまで引き上げ、その後前記第２の開口部から外部に抜き出していた端部を再度中空部内に戻すことにより、前記複数の棒状部材を中空部へ挿入する工程と、
この工程で挿入した複数の棒状部材の各々を貫通する複数の貫通部を備えると共に、この貫通部のなす貫通面とは垂直な方向に伸縮自在な複数のロッドが設けられて成る補強材配置用補助具を、前記複数のロッド先端を通過する円の径が最小の状態で前記中空部に挿入し、前記複数の貫通部の各々に前記複数の棒状部材を貫通させる工程と、
前記複数の棒状部材の各々の上端に締結されるワイヤをそれぞれ懸吊する複数の懸吊部が等間隔に配置される補強材懸吊用治具を前記第２の開口部に固定し、該補強材懸吊用治具の複数の懸吊部に前記複数のワイヤのそれぞれを貫通させて、当該ワイヤを緊張状態で前記複数の棒状部材を中空部内で均等に懸吊する工程と、
前記補強材配置用補助具に設けられる複数のロッドの各先端が鋼管柱内壁面に当接するまで前記複数のロッドを伸長する工程と、
固化した後も収縮しない無収縮モルタルを前記第２の開口部から中空部内の当該第２の開口部下端付近に達するまで注入する工程と、
前記第１および第２の開口部付近の外周に、略鉛直または略水平方向に所定の耐力を有する複数のアラミド繊維シートを貼付する工程と、
この工程で貼付したアラミド繊維シートの外周に鉄板またはフッ素塗料から成る防護部を設ける工程と
を有することを特徴とする鋼管柱の補強方法。 Forming the first and second openings in two regions having different positions in at least the vertical direction of the side surfaces of the existing steel pipe columns;
From each of the plurality of rod-shaped members as the reinforcing material, the end portion serving as the upper end of each rod-shaped member is positioned above the hollow portion from the first opening portion positioned on the lower side in the vertical direction among the two openings formed in this step. The inserted end is pulled out from the second opening located on the upper side in the vertical direction and pulled up until the other end of the rod-shaped member enters the hollow portion, and then the second A step of inserting the plurality of rod-shaped members into the hollow portion by returning the end portion extracted from the opening portion to the inside of the hollow portion again;
Reinforcing material arrangement comprising a plurality of penetrating portions penetrating each of the plurality of rod-shaped members inserted in this step and provided with a plurality of rods that are extendable in a direction perpendicular to the penetrating surface formed by the penetrating portions. Inserting an auxiliary tool into the hollow portion in a state where the diameter of a circle passing through the plurality of rod tips is minimum, and penetrating the plurality of rod-shaped members through each of the plurality of penetration portions;
A reinforcing material suspension jig in which a plurality of suspension portions for respectively suspending wires fastened to upper ends of the plurality of rod-shaped members are arranged at equal intervals is fixed to the second opening, A step of penetrating each of the plurality of wires through a plurality of suspension portions of a reinforcing material suspension jig , and uniformly suspending the plurality of rod-shaped members in a hollow portion in a tension state ;
Extending the plurality of rods until the tips of the plurality of rods provided in the reinforcing material arranging auxiliary tool abut against the inner surface of the steel pipe column; and
Implanting non-shrink mortar does not shrink even after solidification from said second opening to reach the vicinity of the second opening lower end of the hollow portion,
Affixing a plurality of aramid fiber sheets having a predetermined yield strength in a substantially vertical or substantially horizontal direction on the outer periphery in the vicinity of the first and second openings; and
And a step of providing a protective part made of an iron plate or a fluorine paint on the outer periphery of the aramid fiber sheet affixed in this step.

既設の鋼管柱の補強を行うに際して、当該鋼管柱の中空部に挿入される補強材としての複数の棒状部材を中空部内で配置する鋼管柱の補強材配置用補助具であって、
円管形状をなすフレーム部と、
前記複数の棒状部材の各々を貫通するために前記フレーム部の外周に等間隔に設けられる複数の貫通部と、
前記フレーム部の円管形状の断面をなす円の径方向に対して放射状に伸縮自在であり、なおかつ前記円の中心を通り当該円のなす面と垂直な方向を指向する直線を対称軸として回転対称に、かつ前記貫通部と重ならない異なる位置に設けられる複数のロッドと
を備え、
前記鋼管柱中空部に挿入され、前記対称軸が鉛直方向を指向するように配置された後、前記複数のロッドの先端部が鋼管柱中空部の内壁面に当接するまで伸長されて位置が固定されること
を特徴とする補強材配置用補助具。 When reinforcing an existing steel pipe column, a steel pipe column reinforcing material arranging auxiliary tool for arranging a plurality of rod-shaped members as reinforcing materials inserted into the hollow part of the steel pipe column in the hollow part,
A frame portion having a circular tube shape;
A plurality of penetrating portions provided at equal intervals on the outer periphery of the frame portion to penetrate each of the plurality of rod-shaped members;
Rotating about a straight line that is radially expandable and contractable with respect to the radial direction of a circle that forms a circular tube-shaped cross section of the frame portion, and that passes through the center of the circle and is perpendicular to the surface formed by the circle. A plurality of rods provided symmetrically and at different positions that do not overlap the penetrating part ,
After being inserted into the steel pipe column hollow part and arranged so that the axis of symmetry is oriented in the vertical direction, the positions of the plurality of rods are extended until they abut against the inner wall surface of the steel pipe column hollow part and the position is fixed. An auxiliary tool for reinforcing material placement.