JP4988050B1 - Reinforcing bar reinforcement structure and reinforcing method - Google Patents

Reinforcing bar reinforcement structure and reinforcing method Download PDF

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JP4988050B1
JP4988050B1 JP2011039286A JP2011039286A JP4988050B1 JP 4988050 B1 JP4988050 B1 JP 4988050B1 JP 2011039286 A JP2011039286 A JP 2011039286A JP 2011039286 A JP2011039286 A JP 2011039286A JP 4988050 B1 JP4988050 B1 JP 4988050B1
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reinforcing bar
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JP2012177226A (en
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孝 後藤
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Tokyo Tekko Co Ltd
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    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
    • E04C5/01—Reinforcing elements of metal, e.g. with non-structural coatings
    • E04C5/06—Reinforcing elements of metal, e.g. with non-structural coatings of high bending resistance, i.e. of essentially three-dimensional extent, e.g. lattice girders
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
    • E02D5/22—Piles
    • E02D5/34—Concrete or concrete-like piles cast in position ; Apparatus for making same
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C3/00—Structural elongated elements designed for load-supporting
    • E04C3/30—Columns; Pillars; Struts
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
    • E04C5/16—Auxiliary parts for reinforcements, e.g. connectors, spacers, stirrups

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  • Architecture (AREA)
  • Structural Engineering (AREA)
  • Civil Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Paleontology (AREA)
  • General Engineering & Computer Science (AREA)
  • Piles And Underground Anchors (AREA)
  • Reinforcement Elements For Buildings (AREA)

Abstract

【課題】 柱や杭等に用いられる鉄筋籠を吊り上げる際に鉄筋籠の変形を防止する。
【解決手段】
互いに平行をなす直線状の多数の主筋１１を含む鉄筋籠１０が水平姿勢にある状態で、鉄筋籠１０の一端部において、最下位の主筋１１の一端部と最上位の主筋１１の一端部を、Ｕ字形をなす補強筋１４で連結する。鉄筋籠１０の長手方向中央から他端部側へ偏移した箇所を掴んで吊り上げることにより、鉄筋籠１０を上記一端部が接地した傾き姿勢にする。この際、補強筋１４により鉄筋籠１０の変形を防止できる。さらに鉄筋籠１０を吊り上げて垂直姿勢にして地面から浮かす。その後で、補強筋１４を主筋１１から取り外す。
【選択図】 図１PROBLEM TO BE SOLVED: To prevent deformation of a reinforcing bar rod when lifting the reinforcing rod bar used for a column or a pile.
[Solution]
In a state where the reinforcing bar rod 10 including a large number of linear main bars 11 parallel to each other is in a horizontal posture, one end portion of the lowermost main bar 11 and one end portion of the uppermost main bar 11 are arranged at one end portion of the reinforcing bar rod 10. The U-shaped reinforcing bars 14 are connected. By grasping and lifting the portion shifted from the longitudinal center of the reinforcing bar 10 to the other end side, the reinforcing bar 10 is brought into an inclined posture in which the one end is grounded. At this time, the reinforcing bar 14 can prevent deformation of the reinforcing bar 10. Further, the reinforcing bar 10 is lifted to be in a vertical posture and floats from the ground. Thereafter, the reinforcing bar 14 is removed from the main bar 11.
[Selection] Figure 1

Description

本発明は、鉄筋籠を吊り上げる途中で鉄筋籠が変形するのを回避するための、鉄筋籠の補強構造および補強方法に関する。   TECHNICAL FIELD The present invention relates to a reinforcing structure for reinforcing bars and a reinforcing method for avoiding deformation of reinforcing bars in the middle of lifting the reinforcing bar.

建築現場で垂直姿勢の鉄筋籠にコンクリートを打設することにより、柱や基礎杭を構築することは周知である。
上記鉄筋籠は、互いに平行をなして直線的に延びる多数の鉄筋（以下、主筋という）と、これら主筋を囲むようにして長手方向に間隔をおいて配置された環状の多数の鉄筋（以下、フープ筋という）とを有している。これら主筋とフープ筋は、その交差部において細い金属線で結合されている。 It is well known to construct pillars and foundation piles by placing concrete on a reinforcing bar in a vertical position at a construction site.
The reinforcing bar rod is composed of a large number of reinforcing bars (hereinafter referred to as main bars) that extend in parallel with each other in a straight line, and a large number of annular reinforcing bars (hereinafter referred to as hoop bars) that are disposed in the longitudinal direction so as to surround the main bars. And). These main and hoops are connected by a thin metal wire at the intersection.

上記鉄筋籠は工場または建築現場で組み立てられ、建築現場において水平姿勢で地面等に置かれており、必要になった時にクレーンで吊り上げ、柱や基礎杭の構築予定箇所に運ばれるようになっている。特許文献１参照。   The above-mentioned reinforcing bar is assembled at the factory or construction site, placed on the ground in a horizontal position at the construction site, lifted with a crane when needed, and transported to the planned construction site of pillars and foundation piles Yes. See Patent Document 1.

特許第４１３７１７３号公報Japanese Patent No. 4137173

上記鉄筋籠は通常１台のクレーンを用いて吊り上げる。詳述すると、クレーンのブーム先端から垂れ下がった吊り装置が、鉄筋籠をその中央から外れた箇所でチャックし、この状態で鉄筋籠を吊り上げる。これにより、鉄筋籠は最初の水平姿勢から斜めに起こされ、やがて垂直姿勢になり、地面から離れる。   The reinforcing bar is usually lifted by using one crane. More specifically, the suspension device hanging from the boom tip of the crane chucks the reinforcing bar rod at a position off the center and lifts the reinforcing rod rod in this state. As a result, the reinforcing bar rod is raised obliquely from the initial horizontal posture, eventually becomes a vertical posture, and leaves the ground.

上述のように鉄筋籠が斜めになった時には、鉄筋籠の一端部が地面に着いた状態になる。鉄筋籠の多数の主筋は互いに離間した状態で配置されており、その中で最下位に位置する主筋の一端部だけが、地面に着いた状態になる。他の主筋は自らの重力に起因した長手方向の力を受けるため、最下位の鉄筋に対して長手方向にずれる。最上位の主筋の位置ずれが、最も大きい。これら主筋の位置ずれに伴い、フープ筋が主筋に対して直角な状態から斜めになり、鉄筋籠の断面形状の縦寸法（最下位主筋と最上位主筋の間隔）が減少する。このような鉄筋籠の変形は、上下の鉄筋籠同士の連結に支障をきたす。   As described above, when the reinforcing bar rod is inclined, one end portion of the reinforcing bar rod is in contact with the ground. A number of main bars of the reinforcing bar are arranged in a state of being separated from each other, and only one end portion of the main bar located at the lowest position is in a state of being attached to the ground. The other main bars are displaced in the longitudinal direction with respect to the lowest reinforcing bar because they receive the longitudinal force due to their own gravity. The displacement of the top major muscle is the largest. Along with the displacement of the main bars, the hoop bars are inclined from a state perpendicular to the main bars, and the vertical dimension of the cross-sectional shape of the reinforcing bar rod (the interval between the lowest main bar and the highest main bar) decreases. Such deformation of the reinforcing bar hinders the connection between the upper and lower reinforcing bar bar.

また、鉄筋籠が傾いた状態で、最下位の主筋の一端部だけが、地面から鉄筋籠の重量に起因した大きな反力を受けるとともに地面に当たりながら引きずられる。その結果、最下位の主筋の一端部が変形したり傷つく。   Further, in a state where the reinforcing bar rod is tilted, only one end portion of the lowest main bar receives a large reaction force from the ground due to the weight of the reinforcing bar rod and is dragged while hitting the ground. As a result, one end of the lowest main muscle is deformed or damaged.

上述したような鉄筋籠全体の変形や主筋の一端部の変形は、鉄筋籠の長さが長くなるほど、鉄筋籠の重量が増大するほど、生じやすくなる。
そのため、鉄筋籠が長く重量が大きい場合には、鉄筋籠内部に多数の補強筋を組み込んで、鉄筋籠全体の変形を回避しているが、これら内部補強筋は、コンクリートに埋設後の柱等の強度向上に寄与せず、無駄である。しかも、上述した最下位の主筋の一端部の変形や損傷の防止には役立たない。 The above-described deformation of the entire reinforcing bar rod and the deformation of one end of the main bar are more likely to occur as the length of the reinforcing bar rod increases and the weight of the reinforcing bar rod increases.
For this reason, when the reinforcing bar is long and heavy, many reinforcing bars are incorporated inside the reinforcing bar to avoid deformation of the entire reinforcing bar. It does not contribute to the improvement of the strength and is useless. Moreover, it does not help to prevent deformation or damage of one end of the lowermost main muscle described above.

上記不都合を回避するため、メインクレーンの他にサブクレーンを用いて、鉄筋籠を地面から浮かした状態で水平姿勢から垂直姿勢に移行させている方法も実施されている。しかし、この方法では、クレーン操作に熟練を要する。   In order to avoid the above inconvenience, a method of shifting from a horizontal posture to a vertical posture in a state where the reinforcing bar rod is floated from the ground using a sub crane in addition to the main crane is also implemented. However, this method requires skill in crane operation.

本発明は、上記課題を解決するためになされたものであり、互いに平行をなす直線状の多数の主筋を含む鉄筋籠を吊り上げることにより、鉄筋籠を水平姿勢から一端部が接地した傾き姿勢にし、さらに垂直姿勢にする過程において、鉄筋籠を補強するための構造であって、
上記鉄筋籠の上記一端部において、最下位の主筋の一端部と最上位の主筋の一端部を補強筋で連結することを特徴とする。 The present invention has been made to solve the above problems, and by lifting a reinforcing bar rod including a large number of linear main bars parallel to each other, the reinforcing rod rod is changed from a horizontal posture to an inclined posture with one end grounded. In the process of making the vertical posture further, it is a structure for reinforcing the reinforcing bar rod,
In the one end portion of the reinforcing bar, one end portion of the lowermost main bar and one end portion of the uppermost main bar are connected by a reinforcing bar.

上記構成によれば、鉄筋籠が傾いた状態で、最下位の主筋と最上位の主筋の一端部が補強筋により連結されているので、最下位の主筋に対する最上位の主筋の長手方向の位置ずれが無くなり、鉄筋籠全体の変形を防止することができる。そのため、鉄筋籠全体の変形を防ぐための内部補強筋を無くしたり、その数を減らすことができる。また、鉄筋籠は一端部を接地させた状態で吊り上げるので、複雑なクレーン操作も不要である。
また、地面からの反力を最下位の主筋のみならず最上位の主筋でも負担することができるため、最下位の主筋の一端部の変形をも回避することができる。 According to the above configuration, since the reinforcing bar is tilted and one end of the lowermost main bar and the uppermost main bar are connected by the reinforcing bar, the longitudinal position of the uppermost main bar with respect to the lowermost main bar The displacement is eliminated, and deformation of the entire reinforcing bar can be prevented. For this reason, it is possible to eliminate or reduce the number of internal reinforcing bars for preventing deformation of the entire reinforcing bar rod. Further, since the reinforcing bar is lifted with one end grounded, a complicated crane operation is unnecessary.
In addition, since the reaction force from the ground can be borne not only by the lowest principal muscle but also by the highest principal muscle, deformation of one end of the lowest principal muscle can be avoided.

好ましくは、上記補強筋は、直線状の主部と、この主部の両端に連なり主部と直交して延びる一対の結合端部とを有し、これら一対の結合端部が上記最下位の主筋の一端部と最上位の主筋の一端部に、それぞれ着脱可能に連結される。
これによれば、補強筋を取り外して再利用でき、材料の無駄を無くすことができる。また、補強筋は、一対の結合端部を介して主筋の一端部に容易に連結したり取り外すことができる。 Preferably, the reinforcing bar has a linear main portion and a pair of coupling end portions that are connected to both ends of the main portion and extend perpendicular to the main portion, and the pair of coupling end portions are the lowest Removably connected to one end of the main bar and one end of the uppermost main bar.
According to this, the reinforcing bars can be removed and reused, and waste of materials can be eliminated. In addition, the reinforcing bar can be easily connected to or removed from one end of the main bar via a pair of connecting ends.

好ましくは、さらに上記補強筋の一対の結合端部毎に筒形状のカプラーを備え、各カプラーに上記鉄筋籠の主筋の一端部と上記補強筋の結合端部が一直線をなして挿入される。
これによれば、補強筋の連結作業をより一層容易にすることができる。 Preferably, a cylindrical coupler is further provided for each pair of coupling ends of the reinforcing bars, and one end of the main bar of the reinforcing bar and the coupling end of the reinforcing bars are inserted into each coupler in a straight line.
According to this, the connection work of a reinforcing bar can be made still easier.

好ましくは、上記鉄筋籠の最下位および最上位の主筋の少なくとも上記一端部外周に雄ねじが形成され、上記補強筋の少なくとも上記一対の結合端部外周に雄ねじが形成され、上記カプラー内周に雌ねじが形成され、上記主筋の一端部と上記補強筋の結合端部が上記カプラーに螺合される。
上記螺合により、連結作業をより一層容易にすることができるとともに、取り外し作業も容易になる。しかも、補強筋と主筋の連結強度が高いため、鉄筋籠の補強効果を高めることができる。 Preferably, a male screw is formed on at least one outer periphery of the lowermost and uppermost main bars of the reinforcing bar, a male screw is formed on at least the outer periphery of the pair of reinforcing bars, and a female screw is formed on the inner periphery of the coupler. Is formed, and one end of the main bar and the coupling end of the reinforcing bar are screwed into the coupler.
By the above screwing, the connecting work can be further facilitated and the detaching work is also facilitated. In addition, since the connection strength between the reinforcing bar and the main bar is high, the reinforcing effect of the reinforcing bar can be enhanced.

本発明の他の態様は、鉄筋籠の補強方法において、
互いに平行をなす直線状の多数の主筋を含む鉄筋籠が水平姿勢にある状態で、上記鉄筋籠の一端部において、最下位の主筋の一端部と最上位の主筋の一端部を補強筋で連結し、
上記鉄筋籠の長手方向中央から他端部側へ偏移した箇所を掴んで吊り上げることにより、鉄筋籠を上記一端部が接地した傾き姿勢にし、さらに垂直姿勢にして地面から浮かし、
上記鉄筋籠を地面から浮かした後、上記補強筋を上記主筋から取り外すことを特徴とする。 Another aspect of the present invention is a method for reinforcing a reinforcing bar rod,
In the state where the rebar rod including a large number of linear main bars parallel to each other is in a horizontal posture, at one end of the rebar rod, one end of the lowermost main bar and one end of the uppermost main bar are connected by a reinforcing bar And
By grabbing and lifting the location shifted from the longitudinal center of the rebar rod to the other end side, the rebar rod is in an inclined posture where the one end is grounded, and further floated from the ground in a vertical posture,
The reinforcing bar is removed from the main bar after the reinforcing bar is floated from the ground.

本発明によれば、補強筋を用いることにより鉄筋籠を吊る途中において鉄筋籠の変形を防止することができる。   According to the present invention, deformation of the reinforcing bar can be prevented in the middle of hanging the reinforcing bar by using the reinforcing bar.

本発明の一実施形態に係わる鉄筋籠の概略側面図であり、（Ａ）は端部を補強された水平姿勢の柱用鉄筋籠を、クレーンによって吊る直前の状態を示し、（Ｂ）は鉄筋籠が吊られて傾斜した状態を示す。BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic side view of a reinforcing bar rod according to an embodiment of the present invention, in which (A) shows a state just before a column reinforcing rod rod with a reinforced end portion is suspended by a crane, and (B) is a reinforcing bar. A state in which the heel is suspended and inclined is shown. 図１（Ａ）中II−II矢視図である。It is an II-II arrow line view in FIG. 図１（Ａ）中III−III矢視断面図である。It is a III-III arrow sectional view in Drawing 1 (A). 図１（Ａ）の鉄筋籠を一部省略して示す拡大図である。It is an enlarged view which abbreviate | omits and shows a part of reinforcing bar rod of FIG. 図１（Ｂ）の鉄筋籠を一部省略して示す拡大図である。It is an enlarged view which abbreviate | omits and shows a part of reinforcing bar rod of FIG. 垂直に吊られた状態の鉄筋籠を示す側面図であり、（Ａ）は下端部に補強筋が付けられた状態を示し、（Ｂ）は補強筋を外した状態を示し、（Ｃ）は下の階の柱用鉄筋籠の上端部に位置合わせた状態を示し、（Ｄ）は下の階の鉄筋籠の上端部に連結した状態を示す。It is a side view which shows the reinforcing bar rod of the state hung perpendicularly, (A) shows the state where the reinforcing bar was attached to the lower end part, (B) shows the state where the reinforcing bar was removed, (C) The state which aligned with the upper end part of the reinforcing bar rod for pillars of a lower floor is shown, (D) shows the state connected with the upper end part of the reinforcing bar rod of a lower floor. 図１（Ａ）の要部である鉄筋籠の一端部の補強構造をさらに拡大して示す断面図である。It is sectional drawing which expands further and shows the reinforcement structure of the one end part of the rebar rod which is the principal part of FIG. 1 (A).

以下、本発明の一実施形態について図面を参照しながら説明する。図１（Ａ）、図４は、工場または建築現場で製造された柱（垂直構造体）用の鉄筋籠１０を示す。この鉄筋籠１０は、直線的に延びる多数の鉄筋（棒鋼）１１（以下、主筋と称す）と、環状をなす多数の鉄筋（棒鋼）１２（以下、フープ筋と称す）とを備えている。   Hereinafter, an embodiment of the present invention will be described with reference to the drawings. 1A and 4 show a reinforcing bar rod 10 for a column (vertical structure) manufactured in a factory or a construction site. The reinforcing bar rod 10 includes a plurality of reinforcing bars (bars) 11 (hereinafter referred to as main bars) extending linearly and a number of reinforcing bars (bars) 12 (hereinafter referred to as hoop bars) having an annular shape.

上記主筋１１は、互いに平行をなし図３に示すように四角形の角部および辺に間隔をおいて配置されている。なお、主筋１１はこの四角形の内側にも追加的に配置してもよい。
上記フープ筋１２は、主筋１１を囲むようにして四角形をなし、主筋１１の長手方向に間隔をおいて配置されている。
上記フープ筋１２と上記主筋１１は直角に交差し、この交差部において細い金属線（図示しない）により結合されている。 The main bars 11 are parallel to each other, and are arranged at intervals between square corners and sides as shown in FIG. The main bar 11 may be additionally arranged inside the quadrangle.
The hoop muscles 12 have a quadrangular shape so as to surround the main muscles 11 and are arranged at intervals in the longitudinal direction of the main muscles 11.
The hoop bars 12 and the main bars 11 intersect at right angles, and are joined by thin metal wires (not shown) at the intersections.

本実施形態では、主筋１１にはいわゆる「ねじ鉄筋」が用いられている。この「ねじ鉄筋」は圧延工程において雄ねじを全長にわたって形成された鉄筋である。図７にのみ示すように、雄ねじ１１ａは、主筋１１の径方向に対峙する２つの細長い領域１１ｘにおいて、１８０°より小さい角度範囲にわたって形成された多数のねじ状の節によって構成されている。なお、上記２つの領域１１ｘ間の領域１１ｙにはねじ節は形成されていない。
フープ筋１２はねじ鉄筋であってもよいし、ねじ鉄筋でなくてもよい。 In the present embodiment, a so-called “screw rebar” is used for the main reinforcement 11. This “screw rebar” is a rebar in which a male screw is formed over the entire length in the rolling process. As shown only in FIG. 7, the male screw 11 a is configured by a large number of screw-like nodes formed over an angular range smaller than 180 ° in two elongated regions 11 x facing the radial direction of the main muscle 11. Note that no screw node is formed in the region 11y between the two regions 11x.
The hoop bars 12 may be screw rebars or may not be screw rebars.

図１（Ａ）、図４に示すように、鉄筋籠１０の一端部すなわち右側の端部において、全ての主筋１１の一端部にはカプラー１３が取り付けられている。これらカプラー１３は図７に示すように筒形状をなし、その内周には雌ねじ１３ａが形成されている。この雌ねじ１３ａに主筋１１の一端部の雄ねじ１１ａが螺合されている。   As shown in FIGS. 1A and 4, a coupler 13 is attached to one end portion of all the main bars 11 at one end portion of the reinforcing bar rod 10, that is, the right end portion. These couplers 13 have a cylindrical shape as shown in FIG. 7, and an internal thread 13a is formed on the inner periphery thereof. A male screw 11a at one end of the main muscle 11 is screwed into the female screw 13a.

図１（Ａ），図２、図４に示すように、上記鉄筋籠１０の上記一端部において、最下位の主筋１１（すなわち、鉄筋籠１０の四角の断面形状の下辺に位置する主筋１１）は全て、対応する最上位の主筋１１と、Ｕ字形の補強筋１４により連結されている。   As shown in FIGS. 1A, 2, and 4, at the one end of the reinforcing bar rod 10, the lowermost main reinforcing rod 11 (that is, the main reinforcing rod 11 positioned on the lower side of the square cross-sectional shape of the reinforcing bar rod 10). Are all connected by a corresponding uppermost main bar 11 and a U-shaped reinforcing bar 14.

図７に示すように、上記補強筋１４は上記主筋１１と同様にねじ鉄筋からなり、全長にわたって雄ねじ１４ａを有している。この補強筋１４は、圧延により得られた真直のねじ鉄筋を所定長さに切断し、その両端近傍を折り曲げることにより得られる。補強筋１４は、直線的に延びる主部１４ｘと、この主部１４ｘの両端に連なり主部１４ｘと直交して直線的に延びる一対の短い結合端部１４ｙとを有している。   As shown in FIG. 7, the reinforcing bar 14 is formed of a threaded rebar similar to the main bar 11 and has a male thread 14 a over the entire length. This reinforcing bar 14 is obtained by cutting a straight threaded reinforcing bar obtained by rolling into a predetermined length and bending the vicinity of both ends. The reinforcing bar 14 has a main portion 14x that extends linearly and a pair of short coupling end portions 14y that are connected to both ends of the main portion 14x and extend linearly perpendicular to the main portion 14x.

図１（Ａ），図２，図４，図７に示すように、上記補強筋１４の一対の結合端部１４ｙは、カプラー１３を介して上下の主筋１１にそれぞれ連結される。以下、この連結作業について説明する。
連結前は、最下位と最上位の主筋１１のカプラー１３は、他の中間の主筋１１のカプラー１３と同様に、全長にわたって主筋１１に螺合した状態にある。この状態では主筋１１の先端がカプラー１３の端面と面一かこれより若干量突出している。 As shown in FIGS. 1A, 2, 4, and 7, the pair of coupling end portions 14 y of the reinforcing bar 14 are connected to the upper and lower main bars 11 through the coupler 13, respectively. Hereinafter, this connection operation will be described.
Before the connection, the coupler 13 of the lowermost and uppermost main bars 11 is in a state of being screwed to the main bars 11 over the entire length, like the couplers 13 of the other intermediate main bars 11. In this state, the leading end of the main bar 11 is flush with the end face of the coupler 13 or slightly protrudes therefrom.

上記補強筋１４の一対の結合端部１４ｙを上下の主筋１１と同一直線上に位置させて近づけた後、カプラー１３を結合端部１４ｙに向けて回しながら移動させる。これにより、図７に示すように、カプラー１３の一方の半分が主筋１１の端部に螺合し、他方の半分が結合端部１４ｙに螺合した状態になる。その結果、補助筋１４の各結合端部１４ｙが、カプラー１３を介して、対応する主筋１１の一端部に着脱可能に連結される。   After the pair of coupling end portions 14y of the reinforcing bar 14 are positioned on the same straight line as the upper and lower main bars 11, the coupler 13 is moved while rotating toward the coupling end portion 14y. Accordingly, as shown in FIG. 7, one half of the coupler 13 is screwed into the end of the main bar 11 and the other half is screwed into the coupling end 14y. As a result, each coupling end portion 14 y of the auxiliary muscle 14 is detachably connected to one end portion of the corresponding main muscle 11 via the coupler 13.

本発明に係わる鉄筋籠１０の補強構造Ｓは、全ての補強筋１４と、これら補強筋１４の一対の結合端部１４ｙをこれと対応する主筋１１の一端部に連結するカプラー１３とで、構成されている。   The reinforcing structure S of the reinforcing bar rod 10 according to the present invention includes all the reinforcing bars 14 and a coupler 13 that connects a pair of coupling end portions 14y of the reinforcing bars 14 to one end portion of the main reinforcing bar 11 corresponding thereto. Has been.

次に、鉄筋籠１０の吊り上げ工程における上記構成の補強構造Ｓの作用を説明する。図１（Ａ）、図４に示すように、鉄筋籠１０は、角材２０を介して地面に水平に置かれている。   Next, the effect | action of the reinforcement structure S of the said structure in the lifting process of the reinforcing bar 10 is demonstrated. As shown in FIG. 1 (A) and FIG. 4, the reinforcing bar 10 is placed horizontally on the ground via a square bar 20.

他方、クレーン（図示しない）のブーム先端からクレーンケーブル３０が垂れ下がっており、その下端にはフック等の支持具３１（図１（Ａ）では模式的に示されている。）が固定されている。   On the other hand, a crane cable 30 hangs down from a boom tip of a crane (not shown), and a support 31 such as a hook (shown schematically in FIG. 1A) is fixed to the lower end of the crane cable 30. .

上記支持具３１に、吊り装置４０が取り付けされている。図３に最も良く示すように、この吊り装置４０は、天秤式の支持バー４１を有している。この支持バー４１の中央は、第１ケーブル４２を介して上記支持具３１に連結されている。支持バー４１の両端には、それぞれ短い第２ケーブル４３を介してプーリ４４が回転可能に支持されている。各プーリ４４には第３ケーブル４５の中間部が掛け渡されており、各第３ケーブル４５の両端にはクランプ４６が固定されている。   A suspension device 40 is attached to the support tool 31. As best shown in FIG. 3, the suspension device 40 includes a balance-type support bar 41. The center of the support bar 41 is connected to the support 31 via the first cable 42. A pulley 44 is rotatably supported at both ends of the support bar 41 via a short second cable 43. An intermediate portion of the third cable 45 is stretched over each pulley 44, and clamps 46 are fixed to both ends of each third cable 45.

上記クランプ４６は、図３に示すように、鉄筋籠１０の四角形の断面形状の角部に位置する４つの主筋１１を着脱可能に把持している。この把持位置は、図１（Ａ）に示すように、鉄筋籠１０の長手方向中央から上記補強構造Ｓの反対側に偏っている。   As shown in FIG. 3, the clamp 46 detachably holds the four main bars 11 positioned at the corners of the quadrangular cross-sectional shape of the reinforcing bar 10. As shown in FIG. 1A, this gripping position is biased from the center in the longitudinal direction of the reinforcing bar rod 10 to the opposite side of the reinforcing structure S.

次に、クレーンを操作して、上記鉄筋籠１０を吊り上げる。その途中で鉄筋籠１０は図１（Ｂ）、図５に示すように斜めに起き上がり、その一端部が地面に当たった状態となる。この状態で、最下位の主筋１１と最上位の主筋１１が補強筋１４によって連結されているため、最上位の主筋１１が最下位の主筋１１に対して長手方向に位置ずれするのを防止される。中間の主筋１１も、最下位及び最上位の主筋１１とフープ筋１２を介して連結されているため、長手方向の位置ずれを防止される。その結果、鉄筋籠１０全体の変形が防止される。   Next, the crane is operated to lift the reinforcing bar 10. On the way, the reinforcing bar 10 rises diagonally as shown in FIGS. 1 (B) and 5, and one end thereof is in contact with the ground. In this state, the lowermost main bar 11 and the uppermost main bar 11 are connected by the reinforcing bar 14, so that the uppermost main bar 11 is prevented from being displaced in the longitudinal direction with respect to the lowermost main bar 11. The Since the intermediate main reinforcing bar 11 is also connected to the lowermost and uppermost main reinforcing bars 11 via the hoops 12, displacement in the longitudinal direction is prevented. As a result, deformation of the entire rebar rod 10 is prevented.

また、鉄筋籠１０の重量に起因した地面からの反力は、最下位の主筋１１の一端部に加わるとともに、補強筋１４を介して上側の主筋１１の一端部にも加わる。その結果、最下位の主筋１１が負担する反力を半減することができ、その変形を防止できる。   In addition, the reaction force from the ground due to the weight of the reinforcing bar 10 is applied to one end portion of the lowermost main reinforcement 11 and also to one end portion of the upper main reinforcement 11 through the reinforcing bars 14. As a result, the reaction force borne by the lowest principal muscle 11 can be halved, and deformation thereof can be prevented.

なお、鉄筋籠１０が斜めに起き上がった状態で、最下位の主筋１１の端部は直接接地せず、補強筋１４の湾曲部（主部１４ｘと一方の結合端部１４ｙが連なる部位）が接地されるので、鉄筋籠１０が地面に沿って引きずられても、最下位の主筋１１の一端部が傷つくことはない。   In addition, in the state where the reinforcing bar rod 10 is raised obliquely, the end of the lowermost main bar 11 is not directly grounded, and the curved part of the reinforcing bar 14 (the part where the main part 14x and one coupling end 14y are connected) is grounded. Therefore, even if the reinforcing bar rod 10 is dragged along the ground, one end of the lowermost main reinforcing bar 11 is not damaged.

さらに鉄筋籠１０を吊り上げると、鉄筋籠１０は図６（Ａ）に示すように垂直姿勢になり、さらに吊り上げると地面から離れる。この状態で、図６（Ｂ）に示すように補強筋１４を取り外す。この補強筋１４の取り外し作業は、対応するカプラー１３を回しながら主筋１１に沿って上方に移動させることにより、実現できる。取り外した補強筋１４は再利用できる。   When the reinforcing bar 10 is further lifted, the reinforcing bar 10 is in a vertical posture as shown in FIG. 6A, and further lifted away from the ground. In this state, the reinforcing bar 14 is removed as shown in FIG. The removal work of the reinforcing bar 14 can be realized by moving the corresponding coupler 13 upward along the main bar 11 while turning. The removed reinforcing bar 14 can be reused.

次に、図６（Ｃ）に示すように、鉄筋籠１０を下階の鉄筋籠１０’の真上まで移動させる。この下階の鉄筋籠１０’は、吊られた鉄筋籠１０と同様の構成を有し、多数の主筋１１’とフープ筋１２’を有しており、既に上端部を除いてコンクリート５０に埋設されている。   Next, as shown in FIG. 6C, the reinforcing bar rod 10 is moved to a position just above the lower bar rod 10 '. This lower-level reinforcing bar 10 'has the same configuration as the suspended reinforcing bar 10 and has a large number of main bars 11' and hoop bars 12 'and is already embedded in the concrete 50 except for the upper end. Has been.

図６（Ｃ）の工程では、吊られた鉄筋籠１０の主筋１１を、下階の鉄筋籠１０’の主筋１１’と同一直線上に位置するように位置合わせするとともに、主筋１１，１１’を接近させる。   In the step of FIG. 6C, the main bars 11 of the suspended reinforcing bar rod 10 are aligned so as to be positioned on the same straight line as the main bars 11 ′ of the reinforcing bar rod 10 ′ on the lower floor, and the main bars 11, 11 ′. Approach.

次に、図６（Ｄ）に示すように、鉄筋籠１０の全てのカプラー１３を回して下方に移動させ、その半分を下階の鉄筋籠１０’の主筋１１’に螺合させる。これにより、上下の鉄筋籠１０，１０’の主筋１１，１１’同士がカプラー１３により連結される。なお、このカプラー１３の中央に図示しない注入口を形成し、この注入口からモルタル等のグラウトを注入して連結強度を高めてもよい。   Next, as shown in FIG. 6 (D), all the couplers 13 of the reinforcing bar rod 10 are turned and moved downward, and half of them are screwed into the main reinforcing rod 11 'of the reinforcing bar rod 10' on the lower floor. As a result, the main bars 11 and 11 ′ of the upper and lower reinforcing bar rods 10 and 10 ′ are connected by the coupler 13. Note that an injection port (not shown) may be formed in the center of the coupler 13 and grouting such as mortar may be injected from the injection port to increase the connection strength.

上記説明から理解できるように、本実施形態では、上下階の鉄筋籠１０、１０’の主筋１１、１１’を連結するためのカプラー１３を、主筋１１と補強筋１４を連結するために兼用しており、鉄筋籠１０の補強構造Ｓのために追加的に用いられる構成要素は補強筋１４だけで済む。そのため、補強のためのコストを抑えることができる。   As can be understood from the above description, in this embodiment, the coupler 13 for connecting the main bars 11 and 11 ′ of the reinforcing bar rods 10 and 10 ′ on the upper and lower floors is also used for connecting the main bar 11 and the reinforcing bar 14. Therefore, the reinforcing bar 14 is the only component that is additionally used for the reinforcing structure S of the reinforcing bar 10. Therefore, the cost for reinforcement can be suppressed.

本発明は上記実施形態に制約されず、種々の形態を採用可能である。例えば、上記実施形態では、主筋と補強筋として、圧延により形成された雄ねじを有するねじ鉄筋を用いたが、これら主筋、補強筋として通常の異形鉄筋を用い、切削加工により、主筋の一端部および補強筋の一対の結合端部だけに雄ねじを形成してもよい。   The present invention is not limited to the above embodiment, and various forms can be adopted. For example, in the above embodiment, screw reinforcing bars having male threads formed by rolling are used as the main reinforcing bar and the reinforcing bar, but normal deformed reinforcing bars are used as the main reinforcing bar and the reinforcing bar, and by cutting, one end of the main bar and You may form an external thread only in a pair of joint end part of a reinforcement.

上記実施形態では、主筋の一端部と補強筋の結合端部を、螺合によりカプラーに連結したが、螺合以外の方法で、着脱可能に連結してもよい。例えば、筒形状を有するカプラーに単に主筋の一端部と補強筋の結合端部を挿入した状態で、クランプ治具でこれら主筋の一端部および補強筋の結合端部を、カプラーに着脱可能に固定してもよい。この場合、主筋および補強筋として、通常の異形鉄筋を用いてもよい。
また、カプラーを用いず、主筋の一端部および補強筋の結合端部を一直線に位置させた状態でクランプ治具で着脱可能に連結してもよい。
さらに、主筋の一端部および補強筋の結合端部を互いに平行にして隣接させ、これらをクランプ治具または細い金属線で着脱可能に連結してもよい。
主筋の一端部および補強筋の結合端部は溶接等で分離不能に連結してもよい。 In the above embodiment, the one end of the main bar and the coupling end of the reinforcing bar are connected to the coupler by screwing, but may be detachably connected by a method other than screwing. For example, with one end of the main bar and the connecting end of the reinforcing bar inserted into a coupler having a cylindrical shape, the end of the main bar and the connecting end of the reinforcing bar are detachably fixed to the coupler with a clamping jig. May be. In this case, normal deformed reinforcing bars may be used as the main reinforcing bars and reinforcing bars.
Further, without using a coupler, the main bar end and the connecting bar end of the reinforcing bar may be detachably connected with a clamp jig in a state in which the main bar is positioned in a straight line.
Further, one end of the main bar and the coupling end of the reinforcing bar may be adjacent to each other in parallel, and these may be detachably connected with a clamp jig or a thin metal wire.
One end of the main bar and the connecting end of the reinforcing bar may be connected so as not to be separated by welding or the like.

上記実施形態では、最下位の主筋の全てを補強筋によって対応する最上位の主筋に連結したが、最下位の主筋のうち選択した主筋だけを対応する最上位の主筋に連結してもよい。この場合、補強筋に連結されない主筋の端部は、鉄筋籠が斜めに起き上がったときに、地面から離れている。   In the above embodiment, all the lowermost main bars are connected to the corresponding uppermost main bars by the reinforcing bars, but only the selected main bars among the lowermost main bars may be connected to the corresponding uppermost main bars. In this case, the ends of the main bars that are not connected to the reinforcing bars are separated from the ground when the reinforcing bar rod rises diagonally.

本発明は、主に柱や杭等の垂直構造体のための鉄筋籠に適用されるが、他の構造体のための鉄筋籠を吊り下げて搬送する場合にも適用できる。   The present invention is mainly applied to a reinforcing bar for a vertical structure such as a column or a pile, but can also be applied to a case where a reinforcing bar for another structure is suspended and conveyed.

鉄筋籠を吊る装置には特に制約はなく、例えば両端にクランプを有するケーブルの中間部を、クレーンケーブルの下端に設けたフックに掛けるだけでもよい。   There are no particular restrictions on the device for suspending the reinforcing bar rod. For example, the intermediate portion of the cable having clamps at both ends may be hung on the hook provided at the lower end of the crane cable.

本発明は、柱や杭等に用いられる鉄筋籠を吊り上げる際に鉄筋籠の変形を防止するために適用することができる。   The present invention can be applied to prevent deformation of a reinforcing bar rod when lifting the reinforcing bar rod used for a column or a pile.

１０ 鉄筋籠
１１ 主筋
１１ａ 雄ねじ
１２ フープ筋
１３ カプラー
１３ａ 雌ねじ
１４ 補強筋
１４ａ 雄ねじ
１４ｘ 主部
１４ｙ 結合端部
Ｓ 補強構造 DESCRIPTION OF SYMBOLS 10 Reinforcing rod 11 Main bar 11a Male thread 12 Hoop bar 13 Coupler 13a Female thread 14 Reinforcing bar 14a Male thread 14x Main part 14y Joint end S Reinforcement structure

Claims (3)

互いに平行をなす直線状の多数の主筋を含む鉄筋籠を吊り上げることにより、鉄筋籠を水平姿勢から一端部が接地した傾き姿勢にし、さらに垂直姿勢にする過程において、鉄筋籠を補強するための構造であって、
上記鉄筋籠の上記一端部において、最下位の主筋の一端部と最上位の主筋の一端部が補強筋で連結され、
上記補強筋は、直線状の主部と、この主部の両端に連なり主部と直交して延びる一対の結合端部とを有し、これら一対の結合端部が上記最下位の主筋の一端部と最上位の主筋の一端部に、それぞれ筒形状のカプラーを介して着脱可能に連結され、この連結状態で、各カプラーに上記鉄筋籠の主筋の一端部と上記補強筋の結合端部が一直線をなして挿入されていることを特徴とする鉄筋籠の補強構造。 A structure to reinforce the reinforcing bar rod in the process of lifting the reinforcing bar rod from a horizontal posture to a tilted posture with one end grounded, and then to a vertical posture by lifting a reinforcing rod rod including a number of linear main bars parallel to each other Because
In the one end portion of the reinforcing bar cage, one end of the main reinforcement of the end and the top of the lowest longitudinal reinforcement are connected with reinforcement,
The reinforcing bar has a linear main part and a pair of connecting end parts that are connected to both ends of the main part and extend perpendicular to the main part, and the pair of connecting end parts is one end of the lowest main bar. And one end of the uppermost main bar are detachably connected to each other via a cylindrical coupler, and in this connected state, one end of the main bar of the reinforcing bar and the coupling end of the reinforcing bar are connected to each coupler. Reinforcing bar reinforcement structure, characterized by being inserted in a straight line . 上記鉄筋籠の最下位および最上位の主筋の少なくとも上記一端部外周に雄ねじが形成され、上記補強筋の少なくとも上記一対の結合端部外周に雄ねじが形成され、上記カプラー内周に雌ねじが形成され、上記主筋の一端部と上記補強筋の結合端部が上記カプラーに螺合されることを特徴とする請求項１に記載の鉄筋籠の補強構造 A male thread is formed on at least one outer periphery of the lowermost and uppermost main bars of the reinforcing bar rod, a male thread is formed on at least the outer periphery of the pair of reinforcing bars, and a female thread is formed on the inner periphery of the coupler. The reinforcing bar reinforcing structure according to claim 1 , wherein one end of the main bar and a connecting end of the reinforcing bar are screwed into the coupler. 互いに平行をなす直線状の多数の主筋を含む鉄筋籠が水平姿勢にある状態で、上記鉄筋籠の一端部において、最下位の主筋の一端部と最上位の主筋の一端部を補強筋で連結し、この連結に用いられる補強筋は、直線状の主部と、この主部の両端に連なり主部と直交して延びる一対の結合端部とを有し、これら一対の結合端部を、上記最下位の主筋の一端部と最上位の主筋の一端部に、それぞれ筒形状のカプラーを介して着脱可能に連結し、この連結状態で、各カプラーに上記鉄筋籠の主筋の一端部と上記補強筋の結合端部を一直線をなして挿入し、
上記鉄筋籠の長手方向中央から他端部側へ偏移した箇所を掴んで吊り上げることにより、鉄筋籠を上記一端部が接地した傾き姿勢にし、さらに垂直姿勢にして地面から浮かし、
上記鉄筋籠を地面から浮かした後、上記補強筋を上記主筋から取り外すことを特徴とする鉄筋籠の補強方法。 In the state where the rebar rod including a large number of linear main bars parallel to each other is in a horizontal posture, at one end of the rebar rod, one end of the lowermost main bar and one end of the uppermost main bar are connected by a reinforcing bar And the reinforcing bar used for this connection has a linear main part and a pair of connecting end parts that are connected to both ends of the main part and extend perpendicular to the main part. Removably connected to one end of the lowermost main bar and one end of the uppermost main bar via a cylindrical coupler, and in this connected state, one end of the main bar of the rebar bar and the above Insert the connecting end of the reinforcing bar in a straight line,
By grabbing and lifting the location shifted from the longitudinal center of the rebar rod to the other end side, the rebar rod is in an inclined posture where the one end is grounded, and further floated from the ground in a vertical posture,
A method for reinforcing a reinforcing bar rod, comprising: removing the reinforcing bar from the main bar after the reinforcing bar rod is floated from the ground.
JP2011039286A 2011-02-25 2011-02-25 Reinforcing bar reinforcement structure and reinforcing method Active JP4988050B1 (en)

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CN105862728A (en) * 2016-04-08 2016-08-17 中国十七冶集团有限公司 Simple reinforcement cage anti-floating device used for manual hole digging piles
CN109914388A (en) * 2019-03-05 2019-06-21 上海市基础工程集团有限公司 Steel reinforcement cage reinforcing device and method that ultra-deep underground continuous wall is overweight
CN113931378A (en) * 2021-10-28 2022-01-14 上海宝冶冶金工程有限公司 Installation method of column with complex cross section structure
CN114703835A (en) * 2022-05-07 2022-07-05 中建八局第二建设有限公司 Detachable device and method for preventing reinforcement cage from floating upwards during concrete pouring

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CN105862728A (en) * 2016-04-08 2016-08-17 中国十七冶集团有限公司 Simple reinforcement cage anti-floating device used for manual hole digging piles
CN105862728B (en) * 2016-04-08 2018-02-02 中国十七冶集团有限公司 A kind of simple anti-floating system of manually digging hole pile cages
CN109914388A (en) * 2019-03-05 2019-06-21 上海市基础工程集团有限公司 Steel reinforcement cage reinforcing device and method that ultra-deep underground continuous wall is overweight
CN113931378A (en) * 2021-10-28 2022-01-14 上海宝冶冶金工程有限公司 Installation method of column with complex cross section structure
CN114703835A (en) * 2022-05-07 2022-07-05 中建八局第二建设有限公司 Detachable device and method for preventing reinforcement cage from floating upwards during concrete pouring
CN114703835B (en) * 2022-05-07 2023-06-02 中建八局第二建设有限公司 Detachable device and method for preventing reinforcement cage from floating upwards during concrete pouring

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JP2012177226A (en) 2012-09-13
TWI480452B (en) 2015-04-11
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KR20120098398A (en) 2012-09-05
KR101346383B1 (en) 2014-01-02

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