JP2013199740A - Formation method for shear reinforcement of concrete flat slab, road floor slab, and flat slab - Google Patents

Formation method for shear reinforcement of concrete flat slab, road floor slab, and flat slab Download PDF

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JP2013199740A
JP2013199740A JP2012067036A JP2012067036A JP2013199740A JP 2013199740 A JP2013199740 A JP 2013199740A JP 2012067036 A JP2012067036 A JP 2012067036A JP 2012067036 A JP2012067036 A JP 2012067036A JP 2013199740 A JP2013199740 A JP 2013199740A
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concrete
shear reinforcement
slab
bars
reinforcement
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JP5729566B2 (en
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Shigeyuki Matsui
繁之 松井
Hisashi Konno
久志 今野
Hiroshi Mitamura
浩 三田村
Yasufumi Tobishima
康文 飛嶋
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Nihon Kaiser Co Ltd
National Research and Development Agency Public Works Research Institute
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Nihon Kaiser Co Ltd
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Abstract

PROBLEM TO BE SOLVED: To solve the problem that a conventional formation method for concrete flat slab is disadvantageous in manufacturing cost for reinforcement and trouble for arrangement of bars and further manufacturing costs are large with respect to a formation method for shear reinforcement of concrete flat slabs.SOLUTION: A formation method for shear reinforcement of a concrete flat slab formed by arranging upper-end bars, which are arranged longitudinally and laterally in a lattice shape and arranged at an upper position in a flat slab, and lower-end bars, which are arranged longitudinally and laterally in a lattice shape and arranged at a lower position in the flat slab, in a concrete form, and casting concrete in the concrete form includes: placing corrugated shearing reinforcement bars on the upper-end bars, side by side, in one direction from above or placing corrugated shearing reinforcement bars on the upper-end bars, side by side, in mutually orthogonal directions from above; and casting the concrete in the concrete form after fixing the shearing reinforcement bars to the upper-end bars by fixing means.

Description

本発明は、鉄筋コンクリート平版のせん断補強の形成方法と、その方法による道路床版若しくはフラットスラブに関するものである。   The present invention relates to a method for forming shear reinforcement of a reinforced concrete slab and a road slab or flat slab by the method.

従来、橋梁等における床版（現場打ちのものとプレキャスト床版を含む）は、増大する移動荷重によりひび割れなどが進行してコンクリートが部分的に抜け落ちる場合があり、その補強対策として、主鉄筋や配力筋にラチストラス筋によるせん断補強筋を備えて鉄筋コンクリート版としているものが知られている（特許文献１参照）。また、柱と該柱の曲げやせん断力を梁を用いないで直接伝達させるフラットスラブ構造においては、前記柱とフラットスラブとの接合部に生じやすいパンチング破壊に対するせん断補強対策として、特許文献２に記載されているように、フラットスラブの上端筋と下端筋との間に、鉄筋とスパイラル筋とからなるせん断補強筋を略水平に配設して、スラブ厚を増やすことなくせん断耐力を向上させようとするものが知られている。   Conventionally, floor slabs for bridges (including on-site slabs and precast slabs) may cause cracks to occur due to increasing moving loads, causing concrete to partially fall out. It is known that a reinforcing bar is provided with a shear reinforcement bar by lattice struts in the distribution bar (see Patent Document 1). Further, in a flat slab structure that directly transmits a column and the bending and shearing force of the column without using a beam, Patent Document 2 discloses a shear reinforcement measure against punching failure that is likely to occur at the joint between the column and the flat slab. As described, a shear reinforcement bar consisting of reinforcing bars and spiral bars is arranged almost horizontally between the upper and lower bars of the flat slab to improve the shear strength without increasing the slab thickness. What is going to be known.

特開２０１０−１０１０４４号公報JP 2010-101044 A 特開２００４−０４４２２２号公報JP 2004-042222 A

しかし、従来の道路床版等のコンクリート版におけるせん断補強対策では、せん断補強筋の材料コスト、その施工に掛かる手間や工期の長期化が負担となる。本発明に係るコンクリート平版の形成方法と道路床版及びフラットスラブへの適用による形成方法は、このような課題を解決するために提案されたものである。   However, in the conventional measures for shear reinforcement in concrete slabs such as road floor slabs, the material cost of the shear reinforcement, the labor and time required for the construction, and the extension of the construction period are burdens. The concrete slab forming method according to the present invention and the forming method by application to a road floor slab and a flat slab have been proposed in order to solve such problems.

本発明に係るコンクリート平版のせん断補強の形成方法の上記課題を解決して目的を達成するための要旨は、縦・横に格子状にして配筋され平版の中で上位置に配設される上端筋と、縦・横に格子状にして配筋され平版の中で下位置に配設される下端筋とを型枠内に配設し、該型枠内にコンクリートを打設して形成されるコンクリート平版の形成方法において、前記上端筋に波形のせん断補強筋を一方向に上方向から載置して並設させて、又は、上端筋に波形のせん断補強筋を互いに直交する方向に上方向から載置して並設させて、前記せん断補強筋を前記上端筋に固定手段で固定した後、型枠内にコンクリートを打設して形成することである。   The gist for solving the above-mentioned problems of the method for forming a shear reinforcement of a concrete lithographic plate according to the present invention is achieved by arranging the bars vertically and horizontally in a lattice shape and disposing the upper position in the lithographic plate. Formed by placing the upper end bars and the lower end bars arranged in the vertical and horizontal grids at the lower position in the lithographic plate in the formwork and placing concrete in the formwork In the method for forming a concrete slab, the corrugated shear reinforcement bars are placed on the upper end bars in parallel in one direction, or the corrugated shear reinforcement bars are orthogonally arranged on the upper end bars. It is formed by placing in parallel from the upper direction, fixing the shear reinforcement bars to the upper end bars by fixing means, and then placing concrete in the mold.

前記せん断補強筋は、波形の谷部の位置が、下端筋の位置よりも上位置にあることを含むものである。   The shear reinforcing bar includes that the position of the corrugated trough is above the position of the lower end bar.

また、本発明に係る道路床版の要旨は、上記コンクリート平版の形成方法によって、少なくとも橋軸方向に波形のせん断補強筋を並設させて前記コンクリート平版を形成したことである。また、前記橋軸方向の波形のせん断補強筋は、自動車の走行タイヤの走行範囲に対応させて少なくとも当該走行範囲をカバーする補強範囲に配設されることを含むものである。   The gist of the road floor slab according to the present invention is that the concrete slab is formed by juxtaposing corrugated shear reinforcement bars in at least the bridge axis direction by the above-described method of forming a concrete slab. The corrugated shear reinforcing bar in the bridge axis direction includes being disposed in a reinforcing range that covers at least the traveling range in correspondence with the traveling range of the traveling tire of the automobile.

本発明に係るフラットスラブの要旨は、上記コンクリート平版のせん断補強の形成方法によって、少なくとも柱との接合部領域（柱の水平断面辺長の２倍程度を柱の４辺に考える）に前記コンクリート平版を形成したことである。   The gist of the flat slab according to the present invention is that the concrete slab is formed into the concrete slab by the method for forming shear reinforcement of the concrete at least in the joint region with the column (considering about twice the horizontal section side length of the column as four sides of the column). This is the formation of a lithographic plate.

本発明のコンクリート平版のせん断補強の形成方法と、それによる道路床版及びフラットスラブによれば、上端筋と下端筋との間に、せん断力に対する抵抗筋となるせん断補強筋を追加して、道路床版を形成する場合に、若しくは、フラットスラブ等のコンクリート平版の柱との接続部を補強する場合に、直線状の鉄筋を波形に曲げて形成し、それを接続部とその周囲において前記上端筋に載置して位置固定させ、コンクリートを型枠に打設するだけで良いので、せん断補強筋の製作コストが低コストで済むとともに、型枠への配筋作業も簡単で手間が掛からず、配筋工期を短縮できて、効率的なせん断補強対策となる。   According to the method for forming a shear reinforcement of a concrete slab of the present invention, and a road floor slab and a flat slab thereby, a shear reinforcement that becomes a resistance to a shear force is added between the upper and lower reinforcements, When forming a road slab or reinforcing a connection with a concrete slab column such as a flat slab, a straight reinforcing bar is bent into a corrugated shape, and it is formed in the connection and its surroundings. Since it only needs to be placed on the top bar and fixed in position, and concrete is placed on the formwork, the production cost of the shear reinforcement is low, and the work of placing the formwork is easy and labor-intensive. Therefore, it is possible to shorten the bar arrangement work period and to provide an effective measure for shear reinforcement.

前記せん断補強筋は、波形の谷部の位置が、下端筋の位置よりも上位置にあるので、配筋作業の際には、単に上端筋に繋着させ載置して、更に、番線などで位置固定するだけでよく、工期が飛躍的に短縮されコスト低減となる。そして、本発明の形成方法によって道路床版とすれば、移動荷重に対して優れたせん断補強対策となる。自動車の走行タイヤの範囲に本発明の形成方法を適用した床版として、せん断耐力を向上させるのでライフサイクルのコスト低減に繋がる。また、同様に、柱との接続部に前記コンクリート平版を有するフラットスラブとすれば、スラブ厚を増大させること無く、せん断力に対して強く抵抗して、パンチング破壊対策に適したフラットスラブとなる。但し、フラットスラブの場合は、波形鉄筋の波高は、高い方がより効果的である。   Since the position of the corrugated trough is above the position of the bottom reinforcement, the shear reinforcement is simply attached to and placed on the top reinforcement in the case of the reinforcement work, It is only necessary to fix the position by using, and the construction period is drastically shortened and the cost is reduced. And if it is set as a road floor slab by the formation method of this invention, it will become an excellent shear reinforcement measure with respect to a moving load. As a floor slab in which the forming method of the present invention is applied to the range of a running tire of an automobile, the shear strength is improved, which leads to a reduction in life cycle cost. Similarly, if the flat slab having the concrete slab is connected to the column, the flat slab is resistant to shearing force without increasing the slab thickness, and is suitable for measures against punching failure. . However, in the case of a flat slab, the higher the wave height of the corrugated reinforcing bar, the more effective.

本発明に係るコンクリート平版のせん断補強の形成方法の第１実施例を、平版の一部を透視して配筋状態を示す斜視図（Ａ）と、せん断補強筋の側面図（Ｂ）とである。The first embodiment of the method for forming shear reinforcement of a concrete slab according to the present invention is shown in a perspective view (A) showing a bar arrangement state through a part of the lithographic plate and a side view (B) of the shear reinforcement bar. is there. 同本発明に係るコンクリート平版のせん断補強の形成方法の第１実施例を示す一部の側面図（Ａ）と、正面図（Ｂ）とである。They are a partial side view (A) and a front view (B) showing a first embodiment of a method for forming shear reinforcement of a concrete planographic plate according to the present invention. 本発明に係るコンクリート平版のせん断補強の形成方法の第２実施例を示す斜視図（Ａ）と、一部の側面図（Ｂ）と、正面図（Ｃ）とである。It is the perspective view (A) which shows 2nd Example of the formation method of the shear reinforcement of the concrete lithographic plate concerning this invention, a partial side view (B), and a front view (C). 同本発明に係るコンクリート平版のせん断補強の形成方法の第３実施例に係る斜視図である。It is a perspective view which concerns on 3rd Example of the formation method of the shear reinforcement of the concrete slab concerning the same invention. 同本発明に係るコンクリート平版のせん断補強の形成方法の第３実施に係る側面図（Ａ）と、一部の正面図（Ｂ）とである。It is the side view (A) which concerns on 3rd implementation of the formation method of the shear reinforcement of the concrete lithographic plate based on this invention, and a partial front view (B). 同本発明に係るコンクリート平版のせん断補強の形成方法の第４実施に係る斜視図（Ａ）と、一部の側面図（Ｂ）と、正面図（Ｃ）とである。They are the perspective view (A) which concerns on 4th implementation of the formation method of the shear reinforcement of the concrete lithographic plate based on this invention, a partial side view (B), and a front view (C). 本発明に係るコンクリート平版のせん断補強の形成方法によるコンクリート平版を接続部に有するフラットスラブ６の斜視図（Ａ）と側断面図（Ｂ）とである。It is the perspective view (A) and side sectional view (B) of the flat slab 6 which have a concrete slab in the connection part by the formation method of the shear reinforcement of the concrete slab concerning this invention. 同本発明に係るコンクリート平版のせん断補強の形成方法によるコンクリート平版を接続部に有するフラットスラブの平面図（Ａ）と側断面図（Ｂ）とである。It is the top view (A) and side sectional view (B) of a flat slab which have a concrete slab in the connection part by the formation method of the shear reinforcement of the concrete slab according to this invention.

本発明に係るコンクリート平版のせん断補強の形成方法は、図１（Ａ），（Ｂ）に示すように、コンクリート平版１を工場若しくはフラットスラブの建築現場で形成する際に、平版用型枠内の上位置に配筋された上端筋２にせん断補強筋３を載置して形成するものである。   As shown in FIGS. 1 (A) and 1 (B), the method for forming a concrete slab for reinforcing a concrete plate according to the present invention is a method for forming a lithographic plate 1 at a factory or a flat slab building site. The shear reinforcement bar 3 is placed on the upper bar 2 arranged at the upper position.

本発明の第１実施例は、図１（Ａ），（Ｂ）乃至図２（Ａ），（Ｂ）に示すように、縦筋（例えば、主筋）２ａ，４ａ・横筋（例えば、配力筋）２ｂ，４ｂを格子状にして配筋される平版の中で、上位置に配設される上端筋２と、下位置に配設される下端筋４とを型枠（図示せず）内に配設し、該型枠内にコンクリートを打設して形成されるコンクリート平版の形成方法において、前記上端筋２（縦筋２ａ，横筋２ｂのいずれか）に、波形に形成したせん断補強筋３を一方向に並設させて上方向から載置する。   In the first embodiment of the present invention, as shown in FIGS. 1 (A), (B) to 2 (A), (B), vertical muscles (for example, main muscles) 2a, 4a In the planographic arrangement in which the bars 2b and 4b are arranged in a lattice pattern, the upper end bars 2 arranged at the upper position and the lower end bars 4 arranged at the lower position are formed into a mold (not shown). In the method of forming a concrete lithographic plate formed by placing concrete in the formwork, shear reinforcement formed in a corrugated form on the upper end bars 2 (either the vertical bars 2a or the horizontal bars 2b) The muscles 3 are juxtaposed in one direction and placed from above.

前記せん断補強筋３は、図１（Ｂ）に示すように、ピッチＰを上端筋２における縦筋２ａのピッチに合わせて、上下方向において波形にする。また、その高さＨは、前記ピッチＰの半分とすることで、せん断補強筋３の角度θが約４５度となる。これにより、せん断力が斜め４５度に最大で作用するときに、前記せん断補強筋３がそのせん断方向に添って配筋されているので、効率的に抵抗する。このようなせん断補強筋３を予め工場などで形成して所要数用意しておく。   As shown in FIG. 1 (B), the shear reinforcement bars 3 have a pitch P in the vertical direction so that the pitch P matches the pitch of the vertical bars 2a in the upper end bars 2. Further, when the height H is half of the pitch P, the angle θ of the shear reinforcement 3 is about 45 degrees. As a result, when the shearing force acts at an oblique angle of 45 degrees at the maximum, the shear reinforcement bars 3 are arranged along the shearing direction, thereby efficiently resisting. A desired number of such shear reinforcement bars 3 are prepared in advance at a factory or the like.

そして、前記せん断補強筋３を前記上端筋（縦筋２ａ）に番線などの固定手段で固定し、動かないようにした後、型枠内にコンクリートを打設して形成する。このようにして形成したコンクリート平版１は、例えば、新設の道路床版あるいは既設の道路床版の打ち替え補修として、現場打ちで形成する場合でも、工場で予め形成するプレキャストコンクリート版としてでも適用できる。このせん断補強筋３を橋軸方向に適宜間隔で並設するものである。自動車等の移動荷重によってせん断力が作用し、斜め４５度に最大応力が生じても、せん断補強筋３がそれに沿って効いてくるので、有効な補強となるものである。   Then, the shear reinforcing bar 3 is fixed to the upper end bar (vertical bar 2a) by a fixing means such as a wire and is not moved, and then concrete is placed in the formwork. The concrete slab 1 thus formed can be applied, for example, as a replacement repair of a newly installed road floor slab or an existing road floor slab, even when it is formed on-site or as a precast concrete slab previously formed at a factory. . The shear reinforcement bars 3 are juxtaposed at appropriate intervals in the bridge axis direction. Even if a shearing force is applied by a moving load of an automobile or the like and a maximum stress is generated at an angle of 45 degrees, the shear reinforcing bar 3 is effective along that, so that it is effective reinforcement.

本発明の第２実施例に係るコンクリートの平版１ａは、図３に示すように、前記せん断補強筋３の並設の数を増やして間隔のピッチを狭くしたものである。これにより、更に、補強が増すものである。   As shown in FIG. 3, the concrete lithographic plate 1 a according to the second embodiment of the present invention is one in which the number of the shear reinforcing bars 3 is increased and the interval pitch is narrowed. This further increases the reinforcement.

本発明の第３実施例に係るコンクリート平版のせん断補強の形成方法は、図４乃至図５に示すように、上端筋２（縦筋２ａ）に波形のせん断補強筋３を一方向に並設させて上方向から載置した後、更に、前記一方向に直交する他方向にも前記上端筋２（横筋２ｂ）に波形のせん断補強筋３を並設させて上方向から載置して、該両方向のせん断補強筋３，３を前記上端筋２（縦筋２ａ，横筋２ｂ）に固定手段で固定することである。   As shown in FIGS. 4 to 5, the method for forming the shear reinforcement of the concrete planographic plate according to the third embodiment of the present invention has the corrugated shear reinforcement bars 3 arranged in parallel in one direction on the upper end bars 2 (longitudinal bars 2a). Then, after placing from the upper direction, further placing the corrugated shear reinforcement bars 3 in parallel in the other direction perpendicular to the one direction in the upper end muscle 2 (lateral muscle 2b), and placing from the upper direction, The shear reinforcement bars 3 and 3 in both directions are fixed to the upper end bars 2 (vertical bars 2a and horizontal bars 2b) by fixing means.

このように、せん断補強筋３，３を配筋することで、コンクリート平版１ｂの長手方向と短手方向とにおいても、せん断力に抵抗するようになり、特に、フラットスラブの接続部に設けるコンクリート平版１ｂが、正方形かそれに近い形のときに効果を発揮するものである。   In this way, by arranging the shear reinforcement bars 3 and 3, the concrete flat plate 1b can resist the shearing force in the longitudinal direction and the short direction, and in particular, the concrete provided at the connecting portion of the flat slab. This is effective when the lithographic plate 1b has a square shape or a shape close thereto.

図６（Ａ）〜（Ｃ）に示すように、本発明の第４実施例に係るコンクリート平版１ｃのせん断補強の形成方法は、前記せん断補強筋３，３のピッチを狭くして、補強鉄筋の量を増やしたものである。前記コンクリート平版１ｂと前記コンクリート平版１ｃとにおいて、前記せん断補強筋３のピッチの寸法や高さはそれぞれ設計事項である。また、せん断補強筋３の太さは適宜であり、その形状・材質などは、例えば丸棒、異形棒などの鋼材であるが特に限定するものではない。   As shown in FIGS. 6 (A) to (C), the method for forming the shear reinforcement of the concrete slab 1c according to the fourth embodiment of the present invention is to reinforce the reinforcing bars by narrowing the pitch of the shear reinforcement bars 3 and 3. The amount of In the concrete lithographic plate 1b and the concrete lithographic plate 1c, the pitch dimension and height of the shear reinforcing bar 3 are design matters. Further, the thickness of the shear reinforcement 3 is appropriate, and the shape and material thereof are, for example, steel materials such as round bars and deformed bars, but are not particularly limited.

前記各実施例におけるせん断補強筋３は、図２（Ａ）に示すように、実施状態において波形の谷部３ａの位置が、下端筋４（横筋４ｂ）の位置よりも上位置にある。よって、このせん断補強筋３は、平版用型枠において、格子状の上端筋２及び下端筋４を配筋した後に、それらの上方から上端筋２に置いて簡単に載置できるものである。よって、溶接作業が不要であって、仮置き用のスペーサなども不要であり、配筋作業が簡易で工期が短縮される。   As shown in FIG. 2A, the shear reinforcing bar 3 in each of the above embodiments is such that the corrugated valley 3a is positioned above the position of the bottom bar 4 (lateral bar 4b) in the working state. Therefore, the shear reinforcing bar 3 can be easily placed on the upper bar 2 from above after arranging the grid-like upper bar 2 and the lower bar 4 in the planographic formwork. Therefore, welding work is not required, and a temporary placement spacer is not required, so that the bar arrangement work is simple and the construction period is shortened.

本発明に係る道路床版は、前述したように、少なくとも橋梁における橋軸方向に波形のせん断補強筋を並設させて前記コンクリート平版を形成するものであるが、更に、前記橋軸方向の波形のせん断補強筋を、自動車の走行タイヤの走行範囲に対応させて少なくとも当該走行範囲をカバーする（若干広くして）補強範囲に配設することで、工期短縮となるとともに、使用鉄筋量も少なくなってコスト低減となる。   As described above, the road floor slab according to the present invention forms the concrete slab by arranging the corrugated shear reinforcement bars in parallel at least in the bridge axis direction of the bridge. By arranging the shear reinforcement bars in the reinforcement range that covers at least the travel range corresponding to the travel range of the traveling tire of the automobile, the construction period can be shortened and the amount of rebar used is also small. As a result, the cost is reduced.

また、本発明に係るフラットスラブ６は、図７乃至図８に示すように、上記のコンクリート平版の形成方法によって形成されるコンクリート平版１ｂ，１ｃを、フラットスラブ６として、柱５との接合部に適用し、型枠を組んでコンクリートを現場打ちして架設するものである。前記接合部の領域としては、柱の水平断面辺長の２倍程度を柱の４辺に考える。これにより、前記接合部におけるパンチング破壊に対して、せん断力に強いフラットスラブ６が手間をかけずに低コストで製作できる。   Moreover, as shown in FIGS. 7 to 8, the flat slab 6 according to the present invention uses the concrete slabs 1b and 1c formed by the above-described method for forming a concrete slab as the flat slab 6, and is joined to the column 5. It is applied to, concrete is built on-site with a formwork. As the region of the junction, about twice the horizontal cross-sectional side length of the column is considered as the four sides of the column. Thereby, the flat slab 6 strong against the shearing force can be manufactured at low cost without taking time and effort against punching fracture at the joint.

本発明に係るコンクリート平版のせん断補強の形成方法は、フラットスラブに適用するものとして説明したが、これに限らず、ハーフＰＣ版などによる合成版にも応用できるものである。また、衝撃に強いコンクリート平版として床版，壁，基版などに適用できるプレキャストコンクリート版とすることもできる。   Although the method for forming the shear reinforcement of the concrete planographic plate according to the present invention has been described as applied to a flat slab, the present invention is not limited to this and can also be applied to a composite plate such as a half PC plate. Moreover, it can also be set as the precast concrete slab which can be applied to a floor slab, a wall, a base plate, etc. as a concrete flat plate resistant to impact.

１，１ａ，１ｂ，１ｃ コンクリート平版、
２ 上端筋、 ２ａ 縦筋（主筋）、
２ｂ 横筋（配力筋）、
３ せん断補強筋、
４ 下端筋、 ４ａ 縦筋（主筋）、
４ｂ 横筋（配力筋）、
５ 柱、
６ フラットスラブ。 1, 1a, 1b, 1c Concrete flat plate,
2 upper muscle, 2a longitudinal muscle (main muscle),
2b transverse muscle (strengthening muscle),
3 shear reinforcement,
4 Lower muscle, 4a Longitudinal muscle (main muscle),
4b Transverse muscle (strength muscle),
5 pillars,
6 Flat slab.

Claims (5)

縦・横に格子状にして配筋され平版の中で上位置に配設される上端筋と、縦・横に格子状にして配筋され平版の中で下位置に配設される下端筋とを型枠内に配設し、該型枠内にコンクリートを打設して形成されるコンクリート平版の形成方法において、
前記上端筋に波形のせん断補強筋を一方向に上方向から載置して並設させて、
又は、上端筋に波形のせん断補強筋を互いに直交する方向に上方向から載置して並設させて、
前記せん断補強筋を前記上端筋に固定手段で固定した後、型枠内にコンクリートを打設して形成すること、
を特徴とするコンクリート平版のせん断補強の形成方法。 Top and bottom bars arranged vertically and horizontally in a grid and arranged in the upper position in the lithographic plate, and bottom bars arranged in a vertical and horizontal grid pattern and arranged in the lower position in the lithographic plate In a method for forming a concrete lithographic plate formed by placing concrete in a mold and placing concrete in the mold,
A corrugated shear reinforcement bar is placed in one direction from the upper direction on the upper end bar,
Or, it is placed side by side on top of the corrugated shear reinforcement bars in the direction perpendicular to each other,
After fixing the shear reinforcing bar to the upper end bar by a fixing means, it is formed by placing concrete in a mold,
A method for forming a shear reinforcement of a concrete slab characterized by せん断補強筋は、波形の谷部の位置が、下端筋の位置よりも上位置にあること、
を特徴とする請求項１に記載のコンクリート平版のせん断補強の形成方法。 For the shear reinforcement, the corrugated valley is positioned above the bottom reinforcement,
The method for forming a shear reinforcement of a concrete slab according to claim 1. 請求項１〜２のいずれかに記載のコンクリート平版の形成方法によって、少なくとも橋軸方向に波形のせん断補強筋を並設させて前記コンクリート平版を形成したこと、
を特徴とする道路床版。 According to the method for forming a concrete lithographic plate according to any one of claims 1 to 2, the concrete lithographic plate is formed by arranging corrugated shear reinforcement bars in parallel in at least the bridge axis direction.
Road floor slab characterized by. 橋軸方向の波形のせん断補強筋は、自動車の走行タイヤの走行範囲に対応させて少なくとも当該走行範囲をカバーする補強範囲に配設されること、
を特徴とする請求項３に記載の道路床版。 Corrugated shear reinforcement in the direction of the bridge axis is disposed in a reinforcing range that covers at least the traveling range corresponding to the traveling range of the traveling tire of the automobile,
The road floor slab according to claim 3. 請求項１〜２のいずれかに記載のコンクリート平版のせん断補強の形成方法によって、少なくとも柱との接合部に前記コンクリート平版を形成したこと、
を特徴とするフラットスラブ。 The concrete lithographic plate is formed at least at the joint portion with the column by the method for forming the shear reinforcement of the concrete lithographic plate according to claim 1,
Flat slab characterized by.
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JP2018172928A (en) * 2017-03-31 2018-11-08 株式会社ホクエツ Joint structure
CN117605184A (en) * 2024-01-23 2024-02-27 北京市建筑工程研究院有限责任公司 Connecting wall structure, ultra-long seamless concrete wall and construction method thereof

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Publication number Priority date Publication date Assignee Title
JP2018172928A (en) * 2017-03-31 2018-11-08 株式会社ホクエツ Joint structure
CN117605184A (en) * 2024-01-23 2024-02-27 北京市建筑工程研究院有限责任公司 Connecting wall structure, ultra-long seamless concrete wall and construction method thereof
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