JP2013185397A - Shear reinforcing bar and bar arrangement method of the same - Google Patents

Shear reinforcing bar and bar arrangement method of the same Download PDF

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JP2013185397A
JP2013185397A JP2012053027A JP2012053027A JP2013185397A JP 2013185397 A JP2013185397 A JP 2013185397A JP 2012053027 A JP2012053027 A JP 2012053027A JP 2012053027 A JP2012053027 A JP 2012053027A JP 2013185397 A JP2013185397 A JP 2013185397A
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bar
reinforcement
reinforcing bar
shear
reinforcing
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JP5938239B2 (en
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Masamichi Yasunaga
正道 安永
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Kajima Corp
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Abstract

PROBLEM TO BE SOLVED: To make a fixation part inexpensive by forming the fixation part only by bending work of a reinforcing bar, to provide sure fixation, and to easily perform arrangement without moving a longitudinal bar after arranging both side longitudinal bars of a grid shape similarly to a fixation plate type.SOLUTION: A shear reinforcing bar 3 is orthogonal to a longitudinal bar (vertical reinforcement) and a distributing bar (horizontal reinforcement), one end is turned to be a vertical direction bent hook part 4 to be hooked to the distributing bar (horizontal reinforcement), the other end is turned to be a vertical direction bent hook part 4 to be hooked to the distributing bar (horizontal reinforcement), the tip thereof is bent and turned further, and a horizontal direction bent extension part 5 orthogonal to the shear reinforcing bar is locked to the longitudinal bar (vertical reinforcement).

Description

本発明は、せん断補強鉄筋およびその配筋方法に関するものである。   The present invention relates to a shear reinforcing bar and a bar arrangement method thereof.

鉄筋コンクリート構造物の鉄筋は構造物の両側に配置される格子状の主筋(縦筋)、配力筋(横筋)と、必要に応じてせん断力に対する強度を増大するため主筋、配力筋と直交方向に交差する向きに配筋するせん断補強鉄筋により構成される。   Reinforcing bars in reinforced concrete structures are latticed main bars (longitudinal bars) and distribution bars (lateral bars) arranged on both sides of the structure, and perpendicular to the main bars and distribution bars to increase the strength against shearing force as necessary. It is composed of shear reinforcement bars that are arranged in a direction that intersects the direction.

せん断補強鉄筋に定着部を設ける方式としては、大きく2つ、鉄筋端部を曲げ加工する方式と、定着プレート方式とがある。   There are two main methods for providing a fixing portion on a shear reinforcing bar, a method of bending the end of the reinforcing bar, and a fixing plate method.

先に、定着プレート方式について説明すると、鉄筋端部に長円形のプレートを設けるもので、摩擦圧接(プレートの高速回転により鉄筋と接着)、またはフラッシュ(火花)により溶接、ねじ節鉄筋を使用し端部に鉄製のプレートをねじ込む場合などがある。   First, the fixing plate method will be explained. An oblong plate is provided at the end of the reinforcing bar. Welded by friction welding (high-speed rotation of the plate and bonded to the reinforcing bar) or flash (sparks), and using screw joint reinforcing bars. There are cases where an iron plate is screwed into the end.

前者は、ヘッド・バー工法、Jフットバー工法とも呼ばれ、普通鉄筋の端部に長円形もしくは長方形のプレートを摩擦圧接(プレートの高速回転により鉄筋と接着)、またはフラッシュ(火花)により溶接する。工場加工とはなるがプレートフック工法と同様に、現地での施工性、品質に優れている。ヘッド・バー工法の例を図9に、Jフットバー工法の例を図10に示す。   The former is also called a head bar method or a J foot bar method, and an oval or rectangular plate is usually welded to the end of a reinforcing bar by friction welding (adhering to the reinforcing bar by high-speed rotation of the plate) or flash (spark). Although it is factory processing, it is excellent in local workability and quality as well as the plate hook method. An example of the head bar method is shown in FIG. 9, and an example of the J foot bar method is shown in FIG.

後者は、プレートフック工法と呼ばれ、ねじ節鉄筋の端部に長円形のプレートをねじ込み、エポキシ系グラウトで固めたもので、現地で組み立て、設置する。定着部は両側主筋、配力筋を組立てた後、縦筋、横筋の隙間を通して最外鉄筋(配力筋;横筋)とほぼ隙間無く設置することが可能であり、施工性、品質に優れている。プレートフック工法の例を図11に示す。   The latter is called the plate hook method, which is made by screwing an oval plate into the end of the threaded reinforcing bar and hardening it with epoxy grout. The anchoring part can be installed without any gaps between the outer and outer reinforcing bars (feeding bars; transverse bars) through the gap between the longitudinal bars and the horizontal bars after assembling both the main bars and the running bars. Yes. An example of the plate hook method is shown in FIG.

この他に、定着プレート方式に似たものとして、鉄筋の端部を高周波誘導により加熱した後、台に押し付けることにより円形に膨らせてプレート状にするTヘッドバー工法がある。Tヘッドバー工法の例を図12に示す。   In addition to this, there is a T-head bar method similar to the fixing plate method, in which the end portion of the reinforcing bar is heated by high frequency induction and then pressed into a base to be expanded into a plate shape. An example of the T head bar method is shown in FIG.

前記定着プレート方式に対して鉄筋端部を曲げ加工する方式はそれ以前から行われているもので、棒状の補強鉄筋の端部を鉤状、鋭角状又は半円形状に折り曲げ加工してフックを形成し、これを定着部としてそのフックを配力筋(横筋)へ係止することにより定着するものである。   The method to bend the end of the reinforcing bar with respect to the fixing plate method has been practiced before that, and the end of the bar-shaped reinforcing bar is bent into a hook shape, an acute angle shape, or a semicircular shape, and a hook is formed. It is formed and fixed by using the hook as a fixing portion and locking the hook to a distribution bar (lateral bar).

このように鉄筋の端部を曲げ加工し定着部とする場合、コンクリート標準示方書など各種基準で曲げ半径(曲線部曲げ半径3d)、直線部長さなどが規定されている。図13に各種の曲げ加工の例を示すが、(イ)L型フック、(ロ)鋭角フック、(ハ)半円形フック、(ニ)半円形フック+半円形フックがある。   In this way, when bending the end portion of the reinforcing bar to make the fixing portion, the bending radius (curved portion bending radius 3d), the straight portion length, etc. are defined by various standards such as concrete standard specifications. FIG. 13 shows examples of various bending processes. There are (a) an L-shaped hook, (b) an acute angle hook, (c) a semicircular hook, and (d) a semicircular hook + a semicircular hook.

鉄筋端部を曲げ加工する方式や定着プレート方式のいずれの場合も、組み立て手順としては、図14に示すように両側の主筋(縦筋)1、配力筋(横筋)2を所定位置に設置した後、その隙間を通してせん断補強鉄筋3を設置するのが、施工性に優れた合理的な施工方法である。   In either case of bending the reinforcing bar end or fixing plate method, as shown in Fig. 14, the main bars (vertical bars) 1 and the reinforcing bars (horizontal bars) 2 on both sides are installed at predetermined positions. After that, installing the shear reinforcement bar 3 through the gap is a rational construction method with excellent workability.

曲げ加工方式はフックの径が決められており、フック部を小さくすることが難しく、組立てられた主筋や配力筋の隙間を通して配置することは難しい。とくに主筋や配力筋が密に配筋されている場合には、せん断補強鉄筋の施工が難しくなる問題点がある。そこで近年は、定着プレート方式が提案されている。   In the bending method, the diameter of the hook is determined, and it is difficult to make the hook portion small, and it is difficult to arrange the hook portion through the gap between the assembled main bars and distribution bars. In particular, when the main bars and the reinforcing bars are densely arranged, there is a problem that it is difficult to construct the shear reinforcing bars. In recent years, therefore, a fixing plate method has been proposed.

しかし、定着プレート方式についていえば、工場製作によりコストがかかる。ヘッド・バー工法、Jフットバー工法は工場製作となることから、曲げ加工での定着部に比較してコスト高となる。また、定着部は、最外鉄筋(配力筋;横筋)への掛りが小さく、高い耐震性能が要求される場合には抜け出しが懸念される。   However, with regard to the fixing plate method, it is costly due to factory production. Since the head bar method and the J foot bar method are manufactured at the factory, the cost is higher than the fixing part in bending. In addition, the fixing portion is small on the outermost reinforcing bars (distribution reinforcing bars; transverse bars), and may be pulled out when high seismic performance is required.

Tヘッドバー工法は、最外鉄筋(配力筋;横筋)外縁部からTヘッドバー端部までの離れが大きく規定されており、主筋の位置を内側に持ってこないと鉄筋の純かぶりを確保できなくなる。また、他の工法に較べて最外鉄筋への掛りが小さく、高い耐震性能が要求される場合には抜け出しが懸念され、確認実験などが必要となる。さらに、工場製品となるため、曲げ加工に較べてコスト高となる。   The T head bar construction method has a large distance from the outer edge of the outermost reinforcing bar (strengthening bar; transverse bar) to the end of the T head bar. If the main bar is not brought inward, a pure cover of the reinforcing bar is secured. become unable. In addition, when it is less hooked to the outermost rebar than other methods, and high seismic performance is required, there is concern about slipping out, and confirmation experiments are required. Furthermore, since it is a factory product, it is more expensive than bending.

次に曲げ加工方式では、(イ)L型フックは、L形部(定着部)の長さが、15.5d(d;せん断補強鉄筋の径、D13の場合202mm)あり、主筋(縦筋)・配力筋(横筋)とも200mmピッチで配置(空間幅として170mm程度)されるような場合にはD10〜D13程度の細径鉄筋にしか採用できない。   Next, in the bending method, (a) the L-shaped hook has an L-shaped portion (fixing portion) having a length of 15.5 d (d: diameter of the shear reinforcing bar, 202 mm in the case of D13), and the main bar (vertical bar) ) ・ When both the reinforcing bars (horizontal bars) are arranged at a pitch of 200 mm (space width is about 170 mm), they can be used only for small diameter reinforcing bars of about D10 to D13.

せん断補強鉄筋は両側主筋の最外鉄筋(配力筋;横筋)に掛けることが求められるが、(ロ)鋭角フック、(ハ)半円形フックはこのままでは最外鉄筋(配力筋;横筋)に掛けることができない。そのため、せん断補強鉄筋の内離れを最外鉄筋より6d程度以上大きくし設置している。結果的に最外鉄筋とフックの内面に遊びが出来、せん断力に対する抵抗力が小さくなる。   Shear reinforcement bars are required to be hung on the outermost reinforcing bars (distribution bars; transverse bars) of both side main bars, but (b) acute angle hooks and (c) semicircular hooks remain as they are. Can't hang on. Therefore, the inner space of the shear reinforcing bar is set larger than the outermost bar by about 6d or more. As a result, the outermost rebar and the inner surface of the hook can play, and the resistance to shearing force is reduced.

(ニ)半円形フック+半円形フックは最外鉄筋との間に隙間は出来ないが、使用鉄筋量が増加することによるコストアップに加え、2本の半円形フック付きせん断補強鉄筋を直線的に繋ぐことに手間が掛り効率的ではない。   (D) Although there is no gap between the semicircular hook and semicircular hook between the outermost reinforcing bars, in addition to the cost increase due to the increase in the amount of reinforcing bars used, two shear reinforcing reinforcing bars with semicircular hooks are linear. It is not efficient because it takes time to connect to.

本発明の目的は前記従来例の不都合を解消し、定着プレートタイプと同様に、格子状の両側主筋、配力筋を配置した後に、容易にせん断補強鉄筋を配置でき、せん断補強鉄筋の定着部を鉄筋の曲げ加工のみにより形成するので、安価な定着が得られ、しかも、確実に定着させることができるせん断補強鉄筋およびその配筋方法を提供することにある。   The object of the present invention is to eliminate the inconvenience of the conventional example, and like the fixing plate type, after arranging the lattice-like both-side main reinforcing bars and the distribution reinforcing bars, the shear reinforcing reinforcing bars can be easily arranged. Is formed only by bending the reinforcing bars, so that it is possible to provide a shear-reinforcing reinforcing bar and a method of arranging the reinforcing bar that can be fixed at low cost and can be reliably fixed.

前記目的を達成するため本発明は、せん断補強鉄筋としては、主筋(縦筋)、配力筋(横筋)に、これと直交するせん断補強鉄筋であって、一端を配力筋(横筋)に掛止める曲げフック部とし、他端を配力筋(横筋)に掛止める曲げフック部とし、さらにその先を曲げ回して、せん断補強鉄筋に直交する向きの横向き曲げの延設部を形成したこと、もしくは、一端を配力筋(横筋)に掛止める縦向きの曲げフック部とし、他端を主筋(縦筋)に平行させた補助鉄筋に掛止めるものとして、前記縦向きの曲げフック部に対して90°回転させた横向きの曲げフック部としたことを要旨とするものである。   In order to achieve the above object, the present invention provides a shear reinforcing bar as a main reinforcing bar (longitudinal bar) and a distribution bar (horizontal bar), and a shear reinforcing bar perpendicular to the main reinforcing bar (longitudinal bar). Bending hook part to be hooked, bending hook part to be hooked to the distribution bar (lateral bar) at the other end, and the tip of the hook to bend to form an extension part of the horizontal bending in the direction perpendicular to the shear reinforcing bar Or, the vertical bending hook part that is hooked on the auxiliary reinforcing bar that is parallel to the main bar (vertical bar) and the other end is hooked on the vertical bar hook part that hooks one end on the distribution bar (horizontal bar). The gist of the present invention is that it is a laterally bent hook portion rotated by 90 °.

せん断補強鉄筋の配筋方法としては、第1に、一端を配力筋(横筋)に掛止める曲げフック部とし、他端を配力筋(横筋)に掛止める曲げフック部とし、さらにその先を曲げ回して、せん断補強鉄筋に直交する向きの横曲げの延設部を形成したせん断補強鉄筋を使用し、一端の曲げフック部を最外鉄筋(配力筋;横筋)に引っ掛けた後、せん断補強鉄筋を横移動させて、横曲げの延設部を主筋(縦筋)に引っ掛けることを、第2に、一端を配力筋(横筋)に掛止める縦向きの曲げフック部とし、他端を主筋(縦筋)に平行させた補助鉄筋に掛止めるものとして、前記縦向きの曲げフック部に対して90°回転させた横向きの曲げフック部としたせん断補強鉄筋を使用し、一端の曲げフック部を最外鉄筋(配力筋;横筋)に引っ掛けた後、他端の横向きの曲げフック部を配力筋(横筋)に載せて仮置きし、その後、主筋(縦筋)に平行させる補助鉄筋を横向きの曲げフック部と配力筋(横筋)の間に挿入することを要旨とするものである。   As a method of arranging a shear reinforcing bar, firstly, a bending hook portion that is hooked to the reinforcing bar (lateral bar) at one end and a bending hook portion that is hooked to the barring bar (lateral bar) is used at the other end. Using the shear reinforcement bar which formed the extension part of the horizontal bending in the direction perpendicular to the shear reinforcement bar, and hooked the bending hook part at one end to the outermost reinforcement bar (power reinforcement bar; horizontal bar), Move the shear reinforcing bar laterally and hook the extension part of the horizontal bending on the main bar (vertical bar). Secondly, use one end as a vertical bending hook that hooks the distribution bar (horizontal bar). As a hook for the auxiliary reinforcing bar whose end is parallel to the main bar (longitudinal bar), a shear reinforcing bar is used as a horizontal bending hook part rotated 90 ° with respect to the vertical bending hook part. After hooking the bending hook part to the outermost reinforcing bar (distribution bar; transverse bar), the other end Temporarily place the horizontal bending hook on the reinforcing bar (horizontal bar), and then insert an auxiliary reinforcing bar that is parallel to the main bar (vertical bar) between the horizontal bending hook and the horizontal bar (horizontal bar). Is a summary.

本発明によれば、定着プレートと同様に、両側の主筋(縦筋)および配力筋(横筋)を格子状に配置した後に縦筋および横筋を動かすことなく、縦筋および横筋で構成される格子状の隙間を通過させて容易にせん断補強鉄筋を配置できる。   According to the present invention, similar to the fixing plate, the main bars (vertical bars) and the distributing muscles (lateral bars) on both sides are arranged in a lattice pattern, and then the vertical and horizontal bars are configured without moving the vertical and horizontal bars. Shear reinforcing bars can be easily arranged by passing through lattice-shaped gaps.

また、定着プレートなどのように工場加工によるコストアップがなく、コストアップを避けることができる。   Further, there is no cost increase due to factory processing unlike a fixing plate, and an increase in cost can be avoided.

ナット、機械継手など高価な部材を使用しないですむ。また、せん断補強鉄筋を1本で形成し、鉄筋を接続する手間を省くことができる。   There is no need to use expensive parts such as nuts and mechanical joints. Moreover, it is possible to eliminate the labor of connecting the reinforcing bars by forming the shear reinforcing bars with a single piece.

さらに、現場における曲げ加工により定着部の形成を可能とし、コストダウンをはかることができる。   Further, the fixing portion can be formed by bending at the site, and the cost can be reduced.

設計基準に示される半円形フックと同等の定着性能を満足する。半円形フックと同程度の鉄筋材料費、加工費とすることができる。   It satisfies the fixing performance equivalent to the semicircular hook shown in the design standard. Rebar material costs and processing costs can be the same as semi-circular hooks.

本発明のせん断補強鉄筋およびその配筋方法は、せん断補強鉄筋の曲げ加工は工事現場で一般的に用いられている曲げ加工機によって可能であり、加工費、鉄筋の材料費とも従来の半円形フックとほとんど変わらない。   According to the shear reinforcing bar and the bar arrangement method of the present invention, the bending of the shear reinforcing bar can be performed by a bending machine generally used at a construction site, and both the processing cost and the material cost of the reinforcing bar are a conventional semicircular shape. Almost the same as a hook.

全ての曲線部は常温曲げ加工とし、基準に示される3.0d以上の曲げ半径とすることによりせん断補強鉄筋の定着部は半円形フックと同等の強度を有する。   All curved parts are bent at room temperature, and the fixed part of the shear reinforcing bar has the same strength as the semicircular hook by setting the bending radius to 3.0 d or more shown in the standard.

本発明による定着部のフックは、基準に示される両端半円形フックと同等の定着性能を有する。   The hook of the fixing unit according to the present invention has a fixing performance equivalent to that of a semicircular hook at both ends shown in the reference.

曲げ加工後の定着部形状は、主筋(縦筋)および配力筋(横筋)で構成される格子状の空間部を通過できる寸法であり、縦筋および横筋を組立てた後にせん断補強鉄筋を容易に配置できる。   The shape of the anchoring part after bending is a dimension that can pass through a lattice-shaped space composed of main bars (longitudinal bars) and distribution bars (horizontal bars). Can be placed.

定着プレート、ナット、機械継手などの工場製品を必要としないため、安価である。   Since factory products such as fixing plates, nuts, and mechanical joints are not required, they are inexpensive.

以下、図面について本発明の実施の形態を詳細に説明する。図1〜図4は本発明のせん断補強鉄筋およびその配筋方法の第1実施形態を示すもので、図中1は主筋(縦筋)、2は配力筋(横筋)、3はせん断補強鉄筋である。   Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. 1 to 4 show a first embodiment of a shear reinforcing bar and a bar arrangement method according to the present invention. In the figure, 1 is a main bar (longitudinal bar), 2 is a barbing bar (lateral bar), and 3 is a shear reinforcement. It is a reinforcing bar.

せん断補強鉄筋3は、配力筋(横筋)2に直交するもので、一端を配力筋(横筋)2に掛止める半円形の縦向きの曲げフック部4とした。   The shear reinforcing bar 3 is perpendicular to the distribution bar (lateral bar) 2, and is a semicircular vertical bending hook part 4 that is hooked on the distribution bar (lateral bar) 2 at one end.

また、他端を同様に配力筋(横筋)2に掛止める半円形の縦向きの曲げフック部4とし、さらにその先を曲げ回して、せん断補強鉄筋3の本体に直交する向きの横向き曲げの延設部5を形成した。この横向き曲げの延設部5は、主筋(縦筋)1に係止するものとして形成する。   Also, the other end is similarly a semicircular vertical bending hook portion 4 that is hooked to the distribution bar (horizontal bar) 2, and the tip is bent further to bend in the direction perpendicular to the main body of the shear reinforcing bar 3. The extended portion 5 was formed. The extending portion 5 of the lateral bending is formed so as to be locked to the main reinforcement (vertical reinforcement) 1.

前記縦向きの曲げフック部4の形成、および、横向き曲げの延設部5の形成は、常温曲げ加工で製作するで、曲線部を3dの半径で常温曲げ加工した場合に、主鉄筋の格子の空間を挿入できるものに適用する。   The vertical bending hook portion 4 and the lateral bending extending portion 5 are formed by cold bending, and when the curved portion is cold bent with a radius of 3d, the lattice of the main reinforcing bars is formed. Applies to anything that can be inserted.

次にこのようなせん断補強鉄筋3の配筋方法について説明する。せん断補強鉄筋3の片側を半円形フックである縦向きの曲げフック部4、反対側を“半円形フック+横曲げ”形状である半円形の縦向きの曲げフック部4とし、さらにその先を曲げ回して、せん断補強鉄筋3の本体に直交する向きの横向き曲げの延設部5に加工するのは現場で行う。   Next, a method for arranging the shear reinforcing steel bars 3 will be described. One side of the shear reinforcing bar 3 is a vertical bending hook part 4 which is a semi-circular hook, and the other side is a semi-circular vertical bending hook part 4 which is a “semi-circular hook + lateral bending” shape. Bending and processing into the extending part 5 of the transverse bending in the direction orthogonal to the main body of the shear reinforcing bar 3 is performed on site.

主筋(縦筋)1、配力筋(横筋)2を両側に設置した後、せん断補強筋3を主筋(縦筋)1および配力筋(横筋)2の格子状部の隙間を通して配置する。   After the main reinforcement (longitudinal) 1 and the distribution bar (lateral) 2 are installed on both sides, the shear reinforcement 3 is arranged through the gap between the lattices of the main reinforcement (longitudinal) 1 and the distribution line (lateral) 2.

その際、せん断補強鉄筋3の一端の半円形フックである縦向きの曲げフック部4を配力筋(横筋)2に引っ掛けた後、反対側の半円形フックである縦向きの曲げフック部4と横向き曲げの延設部5をバールなどの治具によってしゃくり(決り)、最外鉄筋である配力筋(横筋)2に引っ掛ける。   At that time, after the vertical bending hook portion 4 which is a semicircular hook at one end of the shear reinforcing bar 3 is hooked on the distribution bar (transverse) 2, the vertical bending hook portion 4 which is a semicircular hook on the opposite side. Then, the extending portion 5 of the lateral bending is squeezed (determined) with a jig such as a bar, and hooked to the distribution bar (lateral bar) 2 which is the outermost reinforcing bar.

その後、図4に示すようにせん断補強鉄筋3を横移動させ、横向き曲げの延設部5を主筋(縦筋)1に引っ掛ける。   Thereafter, as shown in FIG. 4, the shear reinforcing bar 3 is moved laterally, and the extending portion 5 of the lateral bending is hooked to the main bar (longitudinal bar) 1.

図5〜図8は本発明のせん断補強鉄筋およびその配筋方法の第2実施形態を示すもので、せん断補強鉄筋3は、配力筋(横筋)2に直交するもので、一端を配力筋(横筋)2に掛止める半円形の曲げフック部4とした点は前記第1実施形態と同じである。   5 to 8 show a second embodiment of the shear reinforcing bar and the bar arrangement method according to the present invention. The shear reinforcing bar 3 is orthogonal to the bar arrangement bar (transverse bar) 2 and one end has a bar arrangement. The semi-circular bending hook portion 4 that is hooked to the line (horizontal line) 2 is the same as in the first embodiment.

他端は、前記縦向きの曲げフック部4に対して90°回転させた(捻った)横向きの曲げフック部6とした。この横向きの曲げフック部6は縦向きの曲げフック部4と同じ大きさでよいが、必ずしもそれに限定されない。この横向きの曲げフック部6は主筋(縦筋)1に平行させた補助鉄筋7に掛止めるものである。   The other end is a horizontal bending hook portion 6 rotated (twisted) by 90 ° with respect to the vertical bending hook portion 4. The horizontal bending hook portion 6 may have the same size as the vertical bending hook portion 4, but is not necessarily limited thereto. The lateral bending hook portion 6 is hooked on an auxiliary reinforcing bar 7 parallel to the main reinforcing bar (vertical reinforcing bar) 1.

次にこのようなせん断補強鉄筋3の配筋方法について説明する。せん断補強鉄筋3の片側を半円形フックである縦向きの曲げフック部4、反対側を90°方向の違う半円形フックである横向きの曲げフック部6に加工するのは現場で行う。   Next, a method for arranging the shear reinforcing steel bars 3 will be described. One side of the shear reinforcing bar 3 is processed into a longitudinal bending hook portion 4 which is a semicircular hook, and the other side is processed into a lateral bending hook portion 6 which is a semicircular hook having a different 90 ° direction.

片側の縦向きの曲げフック部4を配力筋(横筋)2に引っ掛けた後、反対側の定着部である横向きの曲げフック部6を配力筋(横筋)2に載せて仮置きする。   After the vertical bending hook part 4 on one side is hooked on the distribution bar (lateral bar) 2, the horizontal bending hook part 6, which is the fixing part on the opposite side, is placed on the distribution bar (lateral bar) 2 and temporarily placed.

その後、補助鉄筋7(配力筋;横筋と同じ径の鉄筋)を横向きの曲げフック部6と配力筋(横筋)2との間に挿入する。   Thereafter, the auxiliary reinforcing bars 7 (distribution bars; reinforcing bars having the same diameter as the horizontal bars) are inserted between the lateral bending hook portion 6 and the distribution bars (lateral bars) 2.

以上は配力筋(横筋)2が最外鉄筋となる擁壁の壁部(片持ち梁)などの場合で、梁壁構造(壁の周りに柱、梁がある構造)の場合は、最外鉄筋が縦筋となる場合もある。そのような場合には補助鉄筋のかわりに縦筋を後挿入することも可能である。   The above is the case of the retaining wall (cantilever beam) where the strength bar (horizontal bar) 2 is the outermost reinforcing bar, etc., and in the case of the beam wall structure (structure with columns and beams around the wall) In some cases, the external reinforcing bars become longitudinal bars. In such a case, it is also possible to insert a longitudinal bar after the auxiliary reinforcing bar.

4方向(周辺)が柱や梁で囲まれた壁構造(4辺固定版)の場合、縦筋、横筋とも主筋(外力に抵抗する鉄筋)となる。この場合、縦筋を外外、横筋を内内に配置することも、縦筋を外内、横筋を内外に配置することも可能である。縦方向鉄筋を最外縁に配置する場合、せん断補強鉄筋は横筋に仮置きした後、補助鉄筋を使用することなく、縦筋を後挿入(横筋とせん断補強鉄筋のフックとの間に挿入)すれば良い。   In the case of a wall structure (four-side fixed version) surrounded by columns and beams in the four directions (periphery), both the vertical and horizontal bars are the main bars (rebars that resist external forces). In this case, it is possible to arrange the vertical stripes outside and outside, and the horizontal stripes inside and outside, or the vertical stripes inside and outside, and the horizontal stripes inside and outside. When placing the longitudinal reinforcing bar at the outermost edge, temporarily place the shear reinforcing bar on the horizontal bar, and then insert the vertical bar after insertion (inserted between the horizontal bar and the hook of the shear reinforcing bar) without using the auxiliary reinforcing bar. It ’s fine.

本発明のせん断補強鉄筋の第1実施形態を示す斜視図である。It is a perspective view which shows 1st Embodiment of the shear reinforcement steel bar of this invention. 本発明のせん断補強鉄筋およびその配筋方法の第1実施形態を示す正面図である。BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a front view showing a first embodiment of a shear reinforcing bar and a bar arrangement method according to the present invention. 本発明のせん断補強鉄筋およびその配筋方法の第1実施形態を示す平面図である。It is a top view which shows 1st Embodiment of the shear reinforcement bar of this invention, and its bar arrangement method. 本発明のせん断補強鉄筋およびその配筋方法の第1実施形態を示す側面図である。BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a side view showing a first embodiment of a shear reinforcing bar and a bar arrangement method according to the present invention. 本発明のせん断補強鉄筋の第2実施形態を示す斜視図である。It is a perspective view which shows 2nd Embodiment of the shear reinforcement bar of this invention. 本発明のせん断補強鉄筋およびその配筋方法の第2実施形態を示す正面図である。It is a front view which shows 2nd Embodiment of the shear reinforcement bar and the bar arrangement method of this invention. 本発明のせん断補強鉄筋およびその配筋方法の第2実施形態を示す平面図である。It is a top view which shows 2nd Embodiment of the shear reinforcement bar of this invention, and its bar arrangement method. 本発明のせん断補強鉄筋およびその配筋方法の第2実施形態を示す側面図である。It is a side view which shows 2nd Embodiment of the shear reinforcement bar of this invention, and its reinforcement method. ヘッド・バー工法の例を示す説明図である。It is explanatory drawing which shows the example of a head bar method. Jフットバー工法の例を示す説明図である。It is explanatory drawing which shows the example of J foot bar construction method. プレートフック工法の例を示す説明図である。It is explanatory drawing which shows the example of a plate hook construction method. Tヘッドバー工法の説明図である。It is explanatory drawing of T head bar construction method. 通常のせん断補強鉄筋の設置を示す正面図である。It is a front view which shows installation of a normal shear reinforcement bar. 各種の曲げ加工の例を示す説明図である。It is explanatory drawing which shows the example of various bending processes.

1…主筋(縦筋) 2…配力筋(横筋)
3…せん断補強鉄筋 4…縦向きの曲げフック部
5…横向き曲げの延設部 6…横向きの曲げフック部
7…補助鉄筋
1 ... Main muscle (longitudinal muscle) 2 ... Power distribution muscle (lateral muscle)
DESCRIPTION OF SYMBOLS 3 ... Shear reinforcement reinforcing bar 4 ... Longitudinal bending hook part 5 ... Extension part of lateral bending 6 ... Lateral bending hook part 7 ... Auxiliary reinforcing bar

Claims (4)

主筋(縦筋)、配力筋(横筋)に、これと直交するせん断補強鉄筋であって、一端を配力筋(横筋)に掛止める曲げフック部とし、他端を配力筋(横筋)に掛止める曲げフック部とし、さらにその先を曲げ回して、せん断補強鉄筋に直交する向きの横向き曲げの延設部を主筋(縦筋)に係止するものとして形成したことを特徴とするせん断補強鉄筋。   The main reinforcement (vertical reinforcement), the distribution reinforcement (horizontal reinforcement), and the shear reinforcement reinforcement orthogonal to this, with one end as a bending hook that hooks the distribution reinforcement (transverse reinforcement) and the other end of the distribution reinforcement (transverse reinforcement) A bending hook portion that is hooked on the wire, and further bent at the tip thereof, and the extending portion of the transverse bending in a direction perpendicular to the shear reinforcing reinforcing bar is formed to be locked to the main reinforcing bar (vertical reinforcing bar). Reinforcing bar. 一端を配力筋(横筋)に掛止める縦向きの曲げフック部とし、他端を主筋(縦筋)に平行させた補助鉄筋に掛止めるものとして、前記縦向きの曲げフック部に対して90°回転させた横向きの曲げフック部としたことを特徴とするせん断補強鉄筋。   One end is a vertical bending hook portion that is hooked to a distribution bar (horizontal bar) and the other end is hooked to an auxiliary reinforcing bar that is parallel to the main bar (vertical bar). ° Shear-reinforcing bars characterized by rotating sideways bent hooks. 一端を配力筋(横筋)に掛止める曲げフック部とし、他端を配力筋(横筋)に掛止める曲げフック部とし、さらにその先を曲げ回して、せん断補強鉄筋に直交する向きの横曲げの延設部を形成したせん断補強鉄筋を使用し、一端の曲げフック部を最外鉄筋(配力筋;横筋)に引っ掛けた後、せん断補強鉄筋を横移動させて横曲げの延設部を主筋(縦筋)に引っ掛けることを特徴とするせん断補強鉄筋の配筋方法。   One end is a bending hook that is hooked to the reinforcing bar (lateral bar), the other end is a bending hook that is hooked to the barring bar (horizontal bar), and the tip is bent to the side perpendicular to the shear reinforcement bar. Using a shear reinforcing bar with a bent extension part, hook the bending hook part at one end to the outermost reinforcing bar (strengthening bar; transverse bar), and then move the shear reinforcing bar laterally to extend the side bending part. A method for arranging shear-reinforced steel bars, characterized by hooking the main bars (longitudinal bars). 一端を配力筋(横筋)に掛止める縦向きの曲げフック部とし、他端を主筋(縦筋)に平行させた補助鉄筋に掛止めるものとして、前記縦向きの曲げフック部に対して90°回転させた横向きの曲げフック部としたせん断補強鉄筋を使用し、一端の曲げフック部を最外鉄筋(配力筋;横筋)に引っ掛けた後、他端の横向きの曲げフック部を配力筋(横筋)に載せて仮置きし、その後、主筋(縦筋)に平行させる補助鉄筋を横向きの曲げフック部と配力筋(横筋)との間に挿入することを特徴とするせん断補強鉄筋の配筋方法。   One end is a vertical bending hook portion that is hooked to a distribution bar (horizontal bar) and the other end is hooked to an auxiliary reinforcing bar that is parallel to the main bar (vertical bar). ° Using a shear reinforcing bar that is a rotated horizontal bending hook, hook the bending hook at one end to the outermost reinforcing bar (distribution reinforcing bar; horizontal reinforcing bar), and then distribute the horizontal bending hook at the other end A shear-reinforced steel bar, which is temporarily placed on a bar (horizontal bar), and then inserted between the side bending hook and the barb bar (horizontal bar) and an auxiliary bar parallel to the main bar (vertical bar). Reinforcement method.
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JP2019190011A (en) * 2018-04-18 2019-10-31 鹿島建設株式会社 Assembling method of slab reinforcement
JP7037996B2 (en) 2018-04-18 2022-03-17 鹿島建設株式会社 How to assemble slab rebar
CN112513389A (en) * 2018-11-20 2021-03-16 昇谷株式会社 Fixing piece
CN111463569A (en) * 2020-04-25 2020-07-28 王晨庄 5G construction is based on hidden antenna array structure of protection of reinforcing bar or steel construction
JP2022048071A (en) * 2020-09-14 2022-03-25 莊 ▲員▼任 Reinforcement double-winding reinforcement arrangement method using reinforcement having end hook formed on different plane, structure constituted by the reinforcement arrangement method, and reinforcement applied to the reinforcement arrangement method
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CN112122761A (en) * 2020-09-30 2020-12-25 上海市机械施工集团有限公司 Steel bar compression structure and compression method
CN112122761B (en) * 2020-09-30 2023-11-17 上海市机械施工集团有限公司 Reinforcing steel bar compacting structure and compacting method

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