JP2000248678A

JP2000248678A - Shear reinforcing member, half-pc member, and method for constructing floor slab and wall using the same

Info

Publication number: JP2000248678A
Application number: JP11048383A
Authority: JP
Inventors: Yasuo Kato; 泰夫加藤; Shoichi Kamiya; 正一神谷; Hitoshi Sasaki; 仁佐々木; Takashi Arai; 高志荒井; Yasutaka Oi; 康敬大井; Kazuo Yamakawa; 和夫山川; Tomio Sakamoto; 富雄坂本; Osamu Ichikawa; 市川　　修; Michio Kajiwara; 美知雄梶原; Satoshi Kobayakawa; 敏小早川
Original assignee: Fujita Corp
Current assignee: Fujita Corp
Priority date: 1999-02-25
Filing date: 1999-02-25
Publication date: 2000-09-12
Anticipated expiration: 2019-02-25
Also published as: JP4285826B2

Abstract

PROBLEM TO BE SOLVED: To provide a half-PC member which can reduce its production cost to a considerable extent without degrading various functions of conventional erection bars for shear reinforcement. SOLUTION: A half-PC floor member 32 consists of a concrete section 3202, a floor slab lower end reinforcing bar 3204 embedded in the concrete section 3202, a plurality of shear reinforcing members 36 with their lower ends embedded in the concrete section 3202, etc. Each shear reinforcing member 36 is a reinforcing member for a concrete placing joint surface, and consists of an upper string member 40 formed by linearly extending a structural reinforcing bar, and a diagonal member 42 constituted of a structural reinforcing bar arranged on a single plane inclusive of the upper string member 40. The diagonal member 42 is corrugated, which is made up of a number of bottoms 4202 extending in parallel with the upper string member 40, a number of upper hems 4204 fixed to the upper string member 40, and linking portions 4206 sequentially connecting the edge of the bottom 4202 and the edge of the upper hem 4204 to each other.

Description

DETAILED DESCRIPTION OF THE INVENTION

【０００１】[0001]

【発明の属する技術分野】本発明はせん断補強部材、ハ
ーフＰＣ部材、およびそれを用いた床スラブ、壁体の施
工方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shear reinforcing member, a half PC member, and a method of constructing a floor slab and a wall using the same.

【０００２】[0002]

【従来の技術】建築物等の鉄筋コンクリート造床スラブ
の施工においては、該床スラブの下面部を構成するハー
フＰＣ（プレキャストコンクリート）床部材の上面と、
その上面に後打ちされて床スラブの上面部を構成する現
場打ちコンクリート床部の下面との接触面に生じる打継
ぎ面を構造的に一体化させるためのせん断補強部材を組
込んだハーフＰＣ床部材が広く使用されてきている。図
面を参照して説明すると、図１５は複数のハーフＰＣ床
部材と、それらの上面に後打ちされた現場打ちコンクリ
ート床部からなる鉄筋コンクリート造床スラブの分解斜
視図、図１６はハーフＰＣ床部材と、その上面に後打ち
された現場打ちコンクリート床部からなる鉄筋コンクリ
ート造床スラブの断面図、図１７はハーフＰＣ床部材
と、その上面にエスレンボイド型枠を用いて後打ちされ
た現場打ちコンクリート床部からなる鉄筋コンクリート
造床スラブの断面図、図１８は組立鉄筋の斜視図を示し
ている。2. Description of the Related Art In the construction of a reinforced concrete floor slab for a building or the like, the upper surface of a half PC (precast concrete) floor member constituting the lower surface of the floor slab,
Half-PC floor incorporating a shear reinforcing member for structurally integrating a joint surface generated on a contact surface with a lower surface of a cast-in-place concrete floor portion which is post-punched on the upper surface and constitutes an upper surface portion of the floor slab. Components have been widely used. Referring to the drawings, FIG. 15 is an exploded perspective view of a reinforced concrete floor slab composed of a plurality of half-PC floor members and a cast-in-place concrete floor portion which is post-punched on the upper surface thereof, and FIG. 16 is a half-PC floor member. FIG. 17 is a cross-sectional view of a reinforced concrete floor slab composed of a cast-in-place concrete floor section on the upper surface of which, and FIG. 17 is a half-PC floor member and a cast-in-place concrete floor on the upper face thereof using an eslenoid formwork. Sectional view of a reinforced concrete floor slab consisting of a portion, FIG. 18 shows a perspective view of an assembled reinforcing bar.

【０００３】鉄筋コンクリート造床スラブ１０を施工す
るに際して、図１５乃至図１７に示すように、ハーフＰ
Ｃ床部材１２が用いられる。ハーフＰＣ床部材１２は板
状のコンクリート部１２０２と、このコンクリート部１
２０２に格子状に埋め込まれた複数の床スラブ下端鉄筋
１２０４と、それら床スラブ下端鉄筋１２０４上に配置
され下部がコンクリート部１２０２に埋め込まれた複数
のせん断補強用の組立鉄筋１６などから構成され、コン
クリート部１２０２の上面からは組立鉄筋１６の上部が
露出している。そして、このような複数のハーフＰＣ床
部材１２を平面的に並べた後、その上面に現場打ちコン
クリート床部１８を後打ちして鉄筋コンクリート造床ス
ラブ１０が得られる。When a reinforced concrete floor slab 10 is constructed, as shown in FIGS.
A C floor member 12 is used. The half PC floor member 12 includes a plate-like concrete portion 1202 and the concrete portion 1.
202 comprises a plurality of floor slab lower end reinforcing rods 1204 embedded in a lattice shape in 202 and a plurality of shear reinforcing reinforcing bars 16 disposed on the floor slab lower end reinforcing rods 1204 and embedded in the concrete portion 1202, and the like. The upper part of the assembled reinforcing bar 16 is exposed from the upper surface of the concrete part 1202. Then, after arranging the plurality of half PC floor members 12 in a plane, a reinforced concrete floor slab 10 is obtained by post-casting a cast-in-place concrete floor portion 18 on the upper surface thereof.

【０００４】なお、図１７において符号２０は中空部を
示しており、この中空部１８はエスレンボイド型枠を用
いることで形成される。また、符号２２は床主筋を示
し、床主筋２２を用いる場合には、床主筋２２を組立鉄
筋１６上に配筋した後、現場打ちコンクリート床部１８
を打設する。前記組立鉄筋１６は、上記打継ぎ部のせん
断補強を主たる機能とする他、現場打ちコンクリート床
部１８に配設される床主筋２２の位置決め・固定機能、
更には、ハーフＰＣ床部材１２自体の曲げ剛性を高め、
製造・運搬・建て込み等のハンドリング時の部材破損防
止機能をも有するものである。In FIG. 17, reference numeral 20 denotes a hollow portion, and the hollow portion 18 is formed by using an ethlenoid mold. Reference numeral 22 denotes a floor reinforcing bar. When the floor reinforcing bar 22 is used, the floor reinforcing bar 22 is arranged on the assembled reinforcing bar 16 and then the cast-in-place concrete floor portion 18.
Is installed. The assembling rebar 16 has a main function of shear reinforcement at the joint portion and a positioning / fixing function of a floor main reinforcing bar 22 provided on the cast-in-place concrete floor portion 18.
Further, the bending rigidity of the half PC floor member 12 itself is increased,
It also has a function to prevent damage to members during handling such as manufacturing, transportation, and erection.

【０００５】また、最近では鉄筋コンクリート造壁の施
工においても、上記ハーフＰＣ部材を打込み型枠とし
て、施工すべき壁の内外両表面位置のいずれか一方（こ
の場合は、対向するもう一方には通常の型枠が建て込ま
れる。）、あるいは両方に、該組立鉄筋１６側が壁芯側
となるように建て込み、次いで、両面のハーフＰＣ部材
と型枠により形成された空間部に後打ちコンクリートを
打設する施工方法も、実施されるようになってきてい
る。この場合においても、組立鉄筋１６の果たすべき機
能は、コンクリート打継ぎ面のせん断補強をはじめ前記
と同様である。In recent years, in the construction of a reinforced concrete wall, the half PC member is used as a driving form, and one of the inner and outer surface positions of the wall to be constructed (in this case, the other side is usually provided at the opposite side). Or the both sides are assembled so that the assembly reinforcing bar 16 side is the wall core side, and then a post-cast concrete is formed in the space formed by the half PC members and the mold frame on both surfaces. Construction methods for casting are also being implemented. Also in this case, the function to be performed by the assembled reinforcing bar 16 is the same as that described above, including the shear reinforcement of the concrete joint surface.

【０００６】[0006]

【発明が解決しようとする課題】しかしながら、上記ハ
ーフＰＣ部材における組立鉄筋１６は、図１８に示すよ
うに、二等辺三角形の頂点に位置するように配置された
１本の上弦材１６０２と、前記二等辺三角形の底辺両端
の頂点に位置するように配置された２本の下弦材１６０
４、前記上弦材１６０２と下弦材１６０４とを連結する
２本の斜材（ラチス筋）１６０６の計５本の素材を組み
立てられ、ユニット化して構成されている。そのため、
ハーフＰＣ床部材１２の略全面に相当するサイズの組立
鉄筋１６を組み上げるためには、非常に多数の上弦材１
６０２、下弦材１６０４、斜材１６０６を手順よく正確
に組み立てねばならなくなり、組立の段取り・組立作業
の複雑さが増し、加工組立作業に手間がかかり、製作コ
ストが高くつくという問題があり、コスト面で利用上の
制約があった。本発明は前記事情に鑑み案出された物で
あって、本発明の目的は、従来のせん断補強用の組立鉄
筋の諸機能を低下させることなく、その製作コストを相
当に低減できる新たなせん断補強部材、それを用いたハ
ーフＰＣ部材、およびそれを用いた経済的な床スラブと
壁の施工方法を提供することにある。However, as shown in FIG. 18, the assembled reinforcing bar 16 of the half PC member has one upper chord member 1602 arranged at the apex of an isosceles triangle, and Two lower chords 160 arranged at the vertices at both ends of the base of the isosceles triangle
4. A total of five materials, that is, two diagonal members (lattice bars) 1606 connecting the upper chord material 1602 and the lower chord material 1604, are assembled and unitized. for that reason,
In order to assemble the assembly reinforcing bar 16 having a size corresponding to substantially the entire surface of the half PC floor member 12, an extremely large number of upper chord members 1 are required.
602, the lower chord 1604, and the diagonal 1606 must be assembled accurately in a good procedure, increasing the complexity of the setup and assembling work of the assembling, and taking time and effort in the working and assembling work. There were restrictions on use in terms of use. The present invention has been devised in view of the above circumstances, and an object of the present invention is to provide a new shearing device capable of considerably reducing the manufacturing cost without deteriorating various functions of a conventional reinforcing bar for shear reinforcement. An object of the present invention is to provide a reinforcing member, a half PC member using the same, and an economical method of constructing a floor slab and a wall using the same.

【０００７】[0007]

【課題を解決するための手段】前記目的を達成するため
本発明は、板状のコンクリート部と、このコンクリート
部にその一部が埋設された複数のコンクリート打継ぎ面
用せん断補強部材とからなるハーフＰＣ部材であって、
前記せん断補強部材は、１本の構造用鉄筋からなる上弦
材と、１本の構造用鉄筋からなる斜材を備え、前記上弦
材は直線状に延在して形成され、前記斜材は、前記上弦
材の長手方向に等間隔をおいて上弦材に固定された多数
の上辺部と、前記上弦材に平行して延在する直線上に位
置するように配置された多数の底辺部と、これら上辺部
の端部と底辺部の端部とを順次連結する連結部とから波
形に形成され、前記斜材を含む平面が前記コンクリート
部の厚さ方向に平行する方向に延在し、かつ、前記上弦
材が前記コンクリート部の厚さ方向に臨む面に平行して
延在するように前記せん断補強部材の一部が前記コンク
リート部に埋設されていることを特徴とする。また、本
発明は、前記上弦材と斜材は単一の平面内に含まれるよ
うに配置されていることを特徴とする。また、本発明
は、前記斜材を含む面に対して直交する方向において前
記上弦材と前記斜材の上辺部が固定されていることを特
徴とする。また、本発明は、前記コンクリート部に埋設
された前記せん断補強部材の一部は、前記斜材の底辺部
と、連結部の底辺寄り部分であることを特徴とする。ま
た、本発明は、せん断補強部材は格子状に多数配置さ
れ、各交差部において、一方のせん断補強部材の上弦材
の下面に、他方のせん断補強部材の上弦材の上面が当接
するように配置されていることを特徴とする。また、本
発明は、せん断補強部材が、一方の方向に平行する多数
のせん断補強部材と、前記一方の方向に直交する他方の
方向に平行する多数のせん断補強部材とが格子状に配置
され、前記一方の方向に平行する多数のせん断補強部材
と前記他方の方向に平行する多数のせん断補強部材と
は、上弦材と底辺部との天地が逆に配置され、かつ、格
子状をなす各交差部において、上辺部とその両側の連結
部とから形成される凹部が互いに向き合うように配置さ
れていることを特徴とする。また、本発明は、板状のコ
ンクリート部と、このコンクリート部にその一部が埋設
された複数のコンクリート打継ぎ面用せん断補強部材と
からなるハーフＰＣ部材であって、前記せん断補強部材
は、１枚の鋼板からなる上部材と、１本の構造用鉄筋か
らなる斜材と、１本の構造用鉄筋からなる底部材とを備
え、前記上部材は細い幅を有して直線状に延在して形成
され、前記斜材は、前記上部材の幅方向のほぼ中央で上
部材の長手方向に等間隔をおいた箇所に固定された多数
の上辺部と、前記上部材に平行して延在する直線上に位
置するように配置された多数の底辺部と、これら上辺部
の端部と底辺部の端部とを順次連結する連結部とから波
形に形成され、前記底部材は前記上部材と平行して延在
し前記多数の底辺部にそれぞれ固定され、前記斜材を含
む平面が前記コンクリート部の厚さ方向に平行する方向
に延在し、かつ、前記上部材が前記コンクリート部の厚
さ方向に臨む面に平行して延在するように前記せん断補
強部材の一部が前記コンクリート部に埋設されているこ
とを特徴とする。また、本発明は、前記斜材と底部材は
単一の平面内に含まれるように配置されていることを特
徴とする。また、本発明は、前記斜材を含む面に対して
直交する方向において前記底部材と前記斜材の底辺部が
固定されていることを特徴とする。また、本発明は、前
記コンクリート部の底面寄りに構造用鉄筋が格子状に埋
設され、前記せん断補強部材が前記構造用鉄筋に臨む部
分は前記構造用鉄筋に固定されていることを特徴とす
る。このような本発明によれば、従来の組立鉄筋に代わ
りせん断補強部材がコンクリート打継ぎ面のせん断補強
部材として機能し、また、ハーフＰＣ部材自体の曲げ剛
性を高め、製造・運搬・建て込み等のハンドリング時の
部材破損防止機能が奏される。そして、せん断補強部材
は簡易な構成で、組み立てや加工が簡単になされ、ハー
フＰＣ部材のコストダウンを図ることが可能となる。In order to achieve the above object, the present invention comprises a plate-like concrete part and a plurality of concrete reinforcing members for concrete jointing surfaces, some of which are buried in the concrete part. A half PC member,
The shear reinforcing member includes an upper chord member made of one structural reinforcing bar and a diagonal member made of one structural reinforcing bar. The upper chord member is formed to extend linearly, and the diagonal member is A number of upper sides fixed to the upper chord at equal intervals in the longitudinal direction of the upper chord, and a number of bottoms arranged to be located on a straight line extending parallel to the upper chord, A connecting portion that sequentially connects the ends of the upper side and the ends of the bottom side is formed in a waveform, and a plane including the diagonal material extends in a direction parallel to a thickness direction of the concrete portion, and A part of the shear reinforcing member is buried in the concrete portion so that the upper chord material extends in parallel with a surface facing the thickness direction of the concrete portion. Further, the present invention is characterized in that the upper chord material and the diagonal material are arranged so as to be included in a single plane. Further, in the invention, it is preferable that the upper chord member and an upper side of the diagonal member are fixed in a direction orthogonal to a plane including the diagonal member. Further, the invention is characterized in that a part of the shear reinforcing member buried in the concrete portion is a bottom portion of the diagonal member and a portion near the bottom of the connecting portion. Also, in the present invention, a large number of shear reinforcing members are arranged in a lattice shape, and at each intersection, the shear reinforcing members are arranged such that the lower surface of the upper chord material of one shear reinforcing member abuts the upper surface of the upper chord material of the other shear reinforcing member. It is characterized by having been done. Further, in the present invention, the shear reinforcing members are arranged in a lattice with a number of shear reinforcing members parallel to one direction and a number of shear reinforcing members parallel to the other direction orthogonal to the one direction, The multiple shear reinforcing members parallel to the one direction and the multiple shear reinforcing members parallel to the other direction are arranged such that the top and bottom of the upper chord material and the base are reversed, and each of the intersections in a grid shape In the portion, the concave portions formed by the upper side portion and the connecting portions on both sides thereof are arranged so as to face each other. Further, the present invention is a half-PC member composed of a plate-shaped concrete portion and a plurality of concrete joining surface shear reinforcing members partially buried in the concrete portion, wherein the shear reinforcing member is An upper member made of one steel plate, a diagonal member made of one structural reinforcing bar, and a bottom member made of one structural reinforcing bar, wherein the upper member has a narrow width and extends linearly. The diagonal material is formed in parallel with the upper member, with a number of upper side portions fixed at substantially equal centers in the width direction of the upper member at equally spaced locations in the longitudinal direction of the upper member. A number of bases arranged so as to be located on an extending straight line, and a connecting portion that sequentially connects the ends of the tops and the ends of the bases are formed in a waveform, and the bottom member is formed as Extending in parallel with the upper member and fixed to each of the plurality of bottom sides, The shear reinforcing member so that a plane including a material extends in a direction parallel to a thickness direction of the concrete portion, and the upper member extends in parallel to a surface facing the thickness direction of the concrete portion. Is buried in the concrete part. Further, the present invention is characterized in that the diagonal member and the bottom member are arranged so as to be included in a single plane. Further, the present invention is characterized in that the bottom member and a bottom portion of the diagonal member are fixed in a direction orthogonal to a plane including the diagonal member. Further, the present invention is characterized in that a structural reinforcing bar is buried in a lattice shape near a bottom surface of the concrete portion, and a portion where the shear reinforcing member faces the structural reinforcing bar is fixed to the structural reinforcing bar. . According to the present invention, the shear reinforcing member functions as a shear reinforcing member at the joint surface of the concrete instead of the conventional assembled reinforcing bar, and also increases the bending rigidity of the half PC member itself, and manufactures, transports, builds, etc. The function of preventing damage to the members during handling is achieved. Then, the shear reinforcing member has a simple configuration, is easily assembled and processed, and can reduce the cost of the half PC member.

【０００８】また、本発明は、板状のコンクリート部
と、前記コンクリート部の底面寄りに格子状に埋設され
た複数の構造用鉄筋と、前記コンクリート部にその一部
が埋設された複数のコンクリート打継ぎ面用せん断補強
部材とからなるハーフＰＣ部材であって、前記せん断補
強部材は、互いに対向する上フランジおよび下フランジ
と、これら上フランジと下フランジ間を連結するウェブ
とからなる形鋼であり、前記下フランジが構造用鉄筋に
固定され、前記下フランジと、フェブの下フランジ寄り
部分が前記コンクリート部に埋設されていることを特徴
とする。また、本発明は、前記上フランジ、下フラン
ジ、ウェブの全てあるいは何れかにコンクリートに対す
るせん断補強手段が設けられ、前記せん断補強手段はエ
ンボス加工により形成された複数の開口部で、あるいは
バーリング加工で形成された複数の突起で、あるいは溶
着された突起物で構成されていることを特徴とする。こ
のような本発明によれば、従来の組立鉄筋に代わりせん
断補強部材がコンクリート打継ぎ面のせん断補強部材と
して機能し、また、ハーフＰＣ部材自体の曲げ剛性を高
め、製造・運搬・建て込み等のハンドリング時の部材破
損防止機能が奏される。そして、せん断補強部材は形鋼
であるため市販品を利用でき、ハーフＰＣ部材のコスト
ダウンを図ることが可能となる。また、本発明は床スラ
ブの施工方法であって、前記ハーフＰＣ部材を建築物の
所要位置に建て込み、前記コンクリート部の上面から露
出するせん断補強部材の上端の上に直接あるいはスペー
サーを介して床スラブの上端鉄筋を配筋して固定し、次
いで、上端鉄筋が埋設されるように後打ちコンクリート
をハーフＰＣ部材の上面に打設して形成することを特徴
とする。また、本発明は壁体の施工方法であって、前記
ハーフＰＣ部材を建設物の所定壁位置に、該壁の表裏両
面の一方を構成するように建て込むと共に、該壁の表裏
両面の他方を構成するように通常の型枠または通常のハ
ーフＰＣ部材を建て込んで後打ちコンクリート用空間部
を形成し、次いで、該空間部に後打ちコンクリートを打
設することを特徴とする。また、本発明は、後打ちコン
クリートを打設する前に、ハーフＰＣ部材の表面に、廃
棄プラスチックをブロック状に再形成した複数のリサイ
クルブロックが配置されることを特徴とする。このよう
な本発明によれば、前記のハーフＰＣ部材を用いること
で床スラブや壁体の施工にまつわる費用のコストダウン
を図ることが可能となる。また、本発明は、ハーフＰＣ
部材にその一部が埋設して用いられるコンクリート打継
ぎ面用のせん断補強部材であって、前記せん断補強部材
は、１本の構造用鉄筋からなる上弦材と、１本の構造用
鉄筋からなる斜材を備え、前記上弦材は直線状に延在し
て形成され、前記斜材は、前記上弦材の長手方向に等間
隔をおいて上弦材に固定された多数の上辺部と、前記上
弦材に平行して延在する直線上に位置するように配置さ
れた多数の底辺部と、これら上辺部の端部と底辺部の端
部とを順次連結する連結部とから波形に形成されている
ことを特徴とする。また、本発明は、ハーフＰＣ部材に
その一部が埋設して用いられるコンクリート打継ぎ面用
のせん断補強部材であって、前記せん断補強部材は、１
枚の鋼板からなる上部材と、１本の構造用鉄筋からなる
斜材と、１本の構造用鉄筋からなる底部材とを備え、前
記上部材は細い幅を有して直線状に延在して形成され、
前記斜材は、前記上部材の幅方向のほぼ中央で上部材の
長手方向に等間隔をおいた箇所に固定された多数の上辺
部と、前記上部材に平行して延在する直線上に位置する
ように配置された多数の底辺部と、これら上辺部の端部
と底辺部の端部とを順次連結する連結部とから波形に形
成されていることを特徴とする。また、本発明は、前記
底辺部と連結部とのなす角度および上辺部と連結部との
なす角度は同一であり、前記角度は９０゜以上１２０゜
以下であることを特徴とする。このような本発明によれ
ば、ハーフＰＣ部材に用いられることでハーフＰＣ部材
のコストダウンを図ることが可能となる。Further, the present invention provides a plate-shaped concrete portion, a plurality of structural reinforcing bars buried in a lattice near the bottom of the concrete portion, and a plurality of concrete portions partially buried in the concrete portion. A half PC member comprising a joining surface shear reinforcing member, wherein the shear reinforcing member is a shaped steel comprising an upper flange and a lower flange opposed to each other, and a web connecting the upper flange and the lower flange. The lower flange is fixed to a structural reinforcing bar, and the lower flange and a portion closer to the lower flange of the feb are embedded in the concrete portion. Further, in the present invention, all or any of the upper flange, the lower flange, and the web are provided with shear reinforcement means for concrete, and the shear reinforcement means is provided with a plurality of openings formed by embossing or by burring. It is characterized in that it is constituted by a plurality of formed protrusions or a welded protrusion. According to the present invention, the shear reinforcing member functions as a shear reinforcing member at the joint surface of the concrete instead of the conventional assembled reinforcing bar, and also increases the bending rigidity of the half PC member itself, and manufactures, transports, builds, etc. The function of preventing damage to the members during handling is achieved. And since a shear reinforcement member is a shape steel, a commercial item can be used and cost reduction of a half PC member can be attained. Further, the present invention is a method of constructing a floor slab, wherein the half PC member is erected at a required position of a building, and directly or via a spacer on an upper end of a shear reinforcing member exposed from an upper surface of the concrete part. The upper reinforcing bar of the floor slab is arranged and fixed, and then a post-cast concrete is cast on the upper surface of the half PC member so that the upper reinforcing bar is buried. The present invention also relates to a method for constructing a wall, wherein the half PC member is erected at a predetermined wall position of a construction so as to constitute one of the front and back surfaces of the wall, and the other of the front and back surfaces of the wall. A normal formwork or a normal half PC member is erected so as to form a space for a post-cast concrete, and then the post-cast concrete is poured into the space. Further, the present invention is characterized in that a plurality of recycle blocks in which waste plastic is reformed in a block shape are arranged on the surface of the half PC member before casting the post-cast concrete. According to the present invention, by using the half PC member, it is possible to reduce costs related to the construction of the floor slab and the wall. Also, the present invention provides a half PC
A shear reinforcing member for a concrete jointing surface, a part of which is embedded in a member, wherein the shear reinforcing member includes an upper chord member made of one structural reinforcing bar and one structural reinforcing bar. The upper chord member is formed so as to extend in a straight line, and the upper chord member is fixed to the upper chord member at equal intervals in a longitudinal direction of the upper chord member; It is formed in a waveform from a large number of bases arranged so as to be located on a straight line extending in parallel with the material, and a connecting part which sequentially connects the ends of these tops and the bases. It is characterized by being. Further, the present invention is a shear reinforcing member for a concrete joint surface which is used by being partially buried in a half PC member, wherein the shear reinforcing member comprises
An upper member made of a sheet of steel, a diagonal member made of one structural reinforcing bar, and a bottom member made of one structural reinforcing bar, wherein the upper member has a narrow width and extends linearly. Formed
The diagonal material has a number of upper sides fixed at substantially equal centers in the width direction of the upper member and at equal intervals in the longitudinal direction of the upper member, and on a straight line extending parallel to the upper member. It is characterized by being formed in a waveform from a large number of base portions arranged so as to be located, and a connecting portion for sequentially connecting the ends of the upper side portions and the ends of the base side portions. Further, the present invention is characterized in that the angle between the bottom side and the connecting part and the angle between the top side and the connecting part are the same, and the angle is 90 ° or more and 120 ° or less. According to the present invention, the cost of the half PC member can be reduced by using the half PC member.

【０００９】[0009]

【発明の実施の形態】以下、本発明の実施の形態を添付
図面にしたがって説明する。まず、第１の実施の形態か
ら説明すると、図１は係るハーフＰＣ床部材と、それら
の上面に後打ちされた現場打ちコンクリート床部からな
る鉄筋コンクリート造床スラブの分解斜視図、図２は鉄
筋コンクリート造床スラブの断面図、図３は（Ａ）はせ
ん断補強部材の正面図、（Ｂ）は同側面図を示す。鉄筋
コンクリート造床スラブ３０を施工するに際して、図
１、図２に示すように、ハーフＰＣ床部材３２が用いら
れる。ハーフＰＣ床部材３２は板状のコンクリート部３
２０２と、このコンクリート部３２０２に格子状に埋め
込まれた複数の床スラブ下端鉄筋３２０４と、それら床
スラブ下端鉄筋３２０４上に配置され下部がコンクリー
ト部３２０２に埋め込まれた複数のせん断補強部材３６
などから構成され、コンクリート部３２０２の上面から
せん断補強部材３６の上部が露出している。Embodiments of the present invention will be described below with reference to the accompanying drawings. First, from the first embodiment, FIG. 1 is an exploded perspective view of a reinforced concrete floor slab including such half-PC floor members and a cast-in-place concrete floor portion that has been post-cast on the upper surface thereof, and FIG. FIG. 3A is a front view of the shear reinforcing member, and FIG. 3B is a side view of the same. When constructing the reinforced concrete floor slab 30, a half PC floor member 32 is used as shown in FIGS. The half PC floor member 32 is a plate-like concrete part 3
202, a plurality of floor slab lower end reinforcing bars 3204 embedded in the concrete portion 3202 in a grid pattern, and a plurality of shear reinforcing members 36 disposed on the floor slab lower end reinforcing bars 3204 and having a lower portion embedded in the concrete portion 3202.
The upper part of the shear reinforcing member 36 is exposed from the upper surface of the concrete part 3202.

【００１０】前記せん断補強部材３６はコンクリート打
継ぎ面用の補強部材であって、図３（Ａ）、（Ｂ）に示
すように、構造用鉄筋が直線状に延在して形成され曲げ
補強筋として機能する１本の上弦材４０と、前記上弦材
４０を含む単一の平面上に配置された構造用鉄筋からな
りせん断補強筋として機能する１本の斜材４２から構成
されている。前記斜材４２は、前記上弦材４０に平行し
て延在する多数の底辺部４２０２と、前記上弦材４０の
長手方向に等間隔をおいた箇所でそれぞれ固定された多
数の上辺部４２０４と、これら底辺部４２０２の端部と
上辺部４２０４の端部とを順次連結する連結部４２０６
とから波形に形成されている。そして、斜材４２の上辺
部４２０４の下方で上辺部４２０４両端の一対の連結部
４２０６の間に、構造用鉄筋が何も存在しない台形状の
開放部４４（凹部）が形成され、また、斜材４２の下辺
部４２０２の上方で下辺部４２０２両端の一対の連結部
４２０６と上弦材４０との間に構造用鉄筋で囲まれた台
形状の閉塞部４６が形成されている。The shear reinforcing member 36 is a reinforcing member for a joint surface of concrete, and as shown in FIGS. 3 (A) and 3 (B), a reinforcing reinforcing bar is formed to extend linearly to bend and reinforce. It is composed of one upper chord member 40 functioning as a streak, and one diagonal member 42 made of a structural reinforcing bar arranged on a single plane including the upper chord member 40 and functioning as a shear reinforcement. The diagonal member 42 includes a plurality of bottom portions 4202 extending in parallel with the upper chord material 40, a plurality of upper side portions 4204 respectively fixed at equal intervals in the longitudinal direction of the upper chord material 40, A connecting portion 4206 for sequentially connecting the ends of the bottom side 4202 and the ends of the top side 4204.
And are formed in a waveform. A trapezoidal opening 44 (recess) having no structural rebar is formed between the pair of connecting portions 4206 at both ends of the upper side 4204 below the upper side 4204 of the diagonal member 42. Above the lower side 4202 of the member 42, a trapezoidal closing portion 46 surrounded by structural steel is formed between the pair of connecting portions 4206 at both ends of the lower side 4202 and the upper chord 40.

【００１１】前記底辺部４２０２と連結部４２０６との
なす角度および上辺部４２０４と連結部４２０６とのな
す角度は全て同一であり、前記角度は、せん断補強効果
を発揮するのに好ましい角度となる９０゜以上１２０゜
以下の範囲内に設定されている。各せん断補強部材３６
は上弦材４０と斜材４２を含む単一の平面がコンクリー
ト部３２の厚さ方向に平行する方向に延在し、かつ、上
弦材４０がコンクリート部３２の厚さ方向に臨む面に平
行するようにその一部がコンクリート部３２に埋設され
ている。より詳細には、本実施の形態では、各せん断補
強部材３６の斜材４２の底辺部４２０２と、連結部４２
０６の底辺寄り部分がコンクリート部３２に埋設され、
残りの部分がコンクリート部３２の表面から露出し、上
弦材４０がコンクリート部３２の表面の上方で該表面に
平行して延在している。The angle between the bottom side 4202 and the connecting portion 4206 and the angle between the top side 4204 and the connecting portion 4206 are all the same, and the angle is a preferable angle for exerting the shear reinforcing effect. It is set within the range of {over 120}. Each shear reinforcing member 36
A single plane including the upper chord material 40 and the diagonal member 42 extends in a direction parallel to the thickness direction of the concrete portion 32, and the upper chord material 40 is parallel to a surface facing the thickness direction of the concrete portion 32. Thus, a part thereof is buried in the concrete part 32. More specifically, in the present embodiment, the bottom portion 4202 of the diagonal member 42 of each shear reinforcing member 36 and the connecting portion 42
06 near the bottom is buried in the concrete part 32,
The remaining portion is exposed from the surface of the concrete portion 32, and the upper chord 40 extends above and parallel to the surface of the concrete portion 32.

【００１２】このようなせん断補強部材３６は床スラブ
下端鉄筋３２０４上に格子状に配筋されており、図１、
図２に示すように、コンクリート部３２の一辺３２Ａに
平行する複数のせん断補強部材３６Ａは、前記一辺３２
Ａから見た時に、各せん断補強部材３６Ａの開放部４４
と閉塞部４６とが重なるように同一の位相で配筋されて
いる。また、コンクリート部３２の一辺３２Ａに直交す
る一辺３２Ｂに平行する複数のせん断補強部材３６Ｂ
は、前記複数のせん断補強部材３６Ａの閉塞部４６内を
挿通するとともに、せん断補強部材３６Ａの閉塞部４６
内ではせん断補強部材３６Ｂの開放部４４が位置し、か
つ、せん断補強部材３６Ａの上弦材４０の下面にせん断
補強部材３６Ｂの上弦材４０の上面が当接し、一辺３２
Ｂから見た時に、各せん断補強部材３６Ｂの開放部４４
と閉塞部４６とが重なるように同一の位相で配筋されて
いる。Such a shear reinforcing member 36 is arranged in a grid pattern on the reinforcing bar 3204 at the lower end of the floor slab.
As shown in FIG. 2, a plurality of shear reinforcing members 36A parallel to one side 32A of the concrete portion 32 are connected to the one side 32A.
A, the opening 44 of each shear reinforcing member 36A
And the closing portion 46 are arranged in the same phase so as to overlap with each other. A plurality of shear reinforcing members 36B parallel to one side 32B orthogonal to one side 32A of the concrete portion 32
Are inserted through the closed portions 46 of the plurality of shear reinforcing members 36A, and are inserted into the closed portions 46 of the shear reinforcing members 36A.
Inside, the open portion 44 of the shear reinforcing member 36B is located, and the upper surface of the upper chord member 40 of the shear reinforcing member 36B abuts against the lower surface of the upper chord member 40 of the shear reinforcing member 36A, and one side 32
B, the opening 44 of each shear reinforcing member 36B
And the closing portion 46 are arranged in the same phase so as to overlap with each other.

【００１３】そして、双方のせん断補強部材３６Ａ、３
６Ｂの底辺部４２０２あるいは連結部４２０６の下端
は、溶接またはクリップないし他の締付固定手段により
床スラブ下端鉄筋３２０４に固定され、また、せん断補
強部材３６Ａの上弦材４０の下面にせん断補強部材３６
Ｂの上面が当接する箇所も上記と同様な手段により固定
されている。このように格子状に配筋されたせん断補強
部材３６の上弦材４０、斜材４２の上辺部４２０４、連
結部４２０６の上半部がコンクリート部３２の表面から
露出するハーフＰＣ床部材１２が平面的に並べられ、必
要に応じて上弦材４０の上に、直接またはスペーサを介
して床スラブ上端鉄筋が配筋された後、現場打ちコンク
リート床部５０が後打ちされて鉄筋コンクリート造床ス
ラブ３０が得られる。The two shear reinforcing members 36A, 3A
The lower end of the bottom portion 4202 or the connecting portion 4206 of the base member 6B is fixed to the lower reinforcing bar 3204 of the floor slab by welding, a clip or other fastening means, and the shear reinforcing member 36A is attached to the lower surface of the upper chord material 40 of the shear reinforcing member 36A.
The location where the upper surface of B abuts is also fixed by the same means as described above. The half-PC floor member 12 in which the upper chord 40, the upper side 4204 of the diagonal member 42, and the upper half of the connecting portion 4206 exposed from the surface of the concrete portion 32 are arranged in a plane. After the upper reinforcing bar of the floor slab is arranged on the upper chord material 40 directly or via a spacer as necessary, the cast-in-place concrete floor part 50 is post-punched to form the reinforced concrete floor slab 30. can get.

【００１４】本実施の形態のハーフＰＣ部材３２は、従
来の組立鉄筋１６に代わりせん断補強部材３６がコンク
リート打継ぎ面のせん断補強部材として機能し、また、
現場打ちコンクリート床部５０に配設される床スラブ上
端鉄筋（床主筋）の位置決め・固定機能、更には、ハー
フＰＣ床部材３２自体の曲げ剛性を高め、製造・運搬・
建て込み等のハンドリング時の部材破損防止機能が奏さ
れる。そして、せん断補強部材３６は２本の構造用鉄筋
からなる簡易な構成で、組み立てや加工が簡単になされ
るので、ハーフＰＣ部材３２のコストダウンを図ること
が可能となる。さらに、コストダウンを図れることか
ら、従来、コストの面で制約を受けていた種々の分野に
も利用できるようになり、ハーフＰＣ部材３２の実用的
価値を格段と高めることも可能となる。In the half PC member 32 of the present embodiment, the shear reinforcing member 36 functions as a shear reinforcing member for the joint surface of the concrete instead of the conventional reinforcing bar 16.
The positioning and fixing function of the upper reinforcing bar (floor main bar) of the floor slab provided on the cast-in-place concrete floor unit 50, and further, the bending rigidity of the half PC floor member 32 itself is increased, and the manufacturing, transportation,
The function of preventing damage to the members during handling such as erection is exhibited. Since the shear reinforcing member 36 has a simple configuration including two structural reinforcing bars and is easily assembled and processed, the cost of the half PC member 32 can be reduced. Further, since the cost can be reduced, it can be used in various fields which have been conventionally restricted in terms of cost, and the practical value of the half PC member 32 can be significantly increased.

【００１５】また、従来の組立鉄筋１６は上弦材１６０
２の他に２本の下弦材１６０４を備えているために、直
交する二方向に配置しようとすると完全な２段重ねとな
り、厚み方向寸法が過大となり実用的でなくなるのに対
して、本実施の形態ではせん断補強部材３６が下弦材を
備えていないため、図２に示すとおり、実質的に寸法を
殆ど増加させることなく、直交する二方向への配置が簡
単に行え、ハーフＰＣ部材３２、鉄筋コンクリート造床
スラブ３０の機能を格段と向上させることができ、ま
た、省力化・経済性の点でも有利となる。また、上記の
実施の形態では、せん断補強部材３６を格子状に配筋す
るに際して、互いに直交する複数のせん断補強部材３６
Ａ、３６Ｂを、共に底辺部４２０２が下に、上弦材４０
が上になるように配置したが、双方のせん断補強部材３
６Ａ、３６Ｂのうちの一方のせん断補強部材３６の天地
を逆に、すなわち、一方のせん断補強部材３６において
は、底辺部４２０２が上に、上弦材４０が下になるよう
に配置してもよい。このように一方のせん断補強部材３
６の天地を逆にした場合には、上方に開放状に向いた一
方のせん断補強部材３６の開放部４４と、下方に開放状
に向いた他方のせん断補強部材３６の開放部４４とを交
差させればよく、このように交差させることで、交差す
る双方の開口部４４において上辺部４２０４が上下方向
に対向することになり、高さを増加させずにせん断補強
部材３６を格子状に配筋することが可能となる。Further, the conventional assembled reinforcing bar 16 is made of an upper chord material 160.
Since two lower chords 1604 are provided in addition to the two, the arrangement in two orthogonal directions results in a complete two-stage stack, and the thickness dimension becomes excessively large, which is not practical. In the embodiment, since the shear reinforcing member 36 does not include the lower chord material, as shown in FIG. 2, the arrangement in two orthogonal directions can be easily performed without substantially increasing the size, and the half PC member 32, The function of the reinforced concrete floor slab 30 can be remarkably improved, and it is also advantageous in terms of labor saving and economy. Further, in the above embodiment, when arranging the reinforcing members 36 in a lattice shape, the plurality of reinforcing members 36 orthogonal to each other are arranged.
A and 36B, both with the bottom portion 4202 below, the upper chord material 40
Is arranged on the upper side, but both shear reinforcing members 3
6A and 36B, the shear reinforcement member 36 may be arranged upside down, that is, in one shear reinforcement member 36, the bottom portion 4202 is on the top and the upper chord material 40 is on the bottom. . Thus, one shear reinforcing member 3
In the case where the top and bottom of No. 6 are reversed, the opening 44 of one shear reinforcing member 36 facing upward and the opening 44 of the other shear reinforcing member 36 facing downward and open crosses. By intersecting in this way, the upper side portion 4204 is vertically opposed at both intersecting openings 44, and the shear reinforcing members 36 are arranged in a grid without increasing the height. It becomes possible to streak.

【００１６】次に、図４を参照して第２の実施の形態に
ついて説明する。図４は鉄筋コンクリート造床スラブの
断面図を示す。第２の実施の形態に係るハーフＰＣ床部
材３２は、コンクリート部３２０２と、このコンクリー
ト部３２０２に格子状に埋め込まれた複数の床スラブ下
端鉄筋３２０４と、それら床スラブ下端鉄筋３２０４上
に配置され下部がコンクリート部３２０２に埋め込まれ
た複数のせん断補強部材３６から構成され、せん断補強
部材３６の構成は前記実施の形態と同一である。せん断
補強部材３６は格子状に配置されずコンクリート部３２
０２の一辺に平行させて複数設けられている。そして、
せん断補強部材３６の上弦材４０、斜材４２の上辺部４
２０４、連結部４２０６の上半部がコンクリート部３２
の表面から露出している。Next, a second embodiment will be described with reference to FIG. FIG. 4 shows a sectional view of a reinforced concrete floor slab. The half PC floor member 32 according to the second embodiment is disposed on a concrete portion 3202, a plurality of floor slab lower end reinforcing bars 3204 embedded in a lattice shape in the concrete portion 3202, and the floor slab lower end reinforcing bars 3204. The lower portion is composed of a plurality of shear reinforcing members 36 embedded in the concrete portion 3202, and the configuration of the shear reinforcing members 36 is the same as that of the above-described embodiment. The shear reinforcing members 36 are not arranged in a grid pattern but are
02 are provided in parallel with one side of the reference numeral 02. And
Upper chord material 40 of shear reinforcement member 36, upper side 4 of diagonal material 42
204, the upper half of the connecting portion 4206 is the concrete portion 32
It is exposed from the surface.

【００１７】このようなハーフＰＣ床部材３２が平面的
に並べられ、上弦材４０の上に、直接またはスペーサを
介して床スラブ上端鉄筋５２が格子状に配筋された後、
現場打ちコンクリート床部５０が後打ちされて鉄筋コン
クリート造床スラブ３０が得られる。なお、図４におい
て符号５４は中空部を示しており、この中空部５４はエ
スレンボイド型枠を用いることで形成される。また、中
空部５４を、廃棄プラスチックをブロック状に再形成し
たリサイクルブロックを用いることで形成することも可
能である。この場合には、現場打ちコンクリート床部５
０を後打ちする前に、ハーフＰＣ床部材３２の上にリサ
イクルブロックを固定しておき、現場打ちコンクリート
床部５０を後打ちしてリサイクルブロックをコンクリー
ト中に埋め込むことになる。このようなリサイクルブロ
ックとして、本出願人が既に出願済である特願平１０−
１２３２７４号「リサイクルプラスチックブロック」
や、特願平下１０−１２３２９０号「リサイクルプラス
チックブロック」、特願平１０−１２３３９１号「リサ
イクルブロック」を用いることができる。After such half-PC floor members 32 are arranged in a plane and the upper reinforcing bar 52 of the floor slab is laid on the upper chord member 40 directly or via a spacer,
The cast-in-place concrete floor 50 is post-punched, and the reinforced concrete floor slab 30 is obtained. In FIG. 4, reference numeral 54 denotes a hollow portion, and the hollow portion 54 is formed by using an ethlenoid mold. Further, the hollow portion 54 can be formed by using a recycled block in which waste plastic is reformed into a block shape. In this case, the cast-in-place concrete floor 5
Before post-imprinting 0, a recycled block is fixed on the half PC floor member 32, and the cast-in-place concrete floor portion 50 is post-implanted to embed the recycled block in concrete. As such a recycling block, Japanese Patent Application No.
123274 "Recycled plastic block"
Alternatively, Japanese Patent Application No. 10-123290, "Recycled Plastic Block" and Japanese Patent Application No. 10-123391, "Recycled Block" can be used.

【００１８】次に、図５および図６を参照してせん断補
強部材３６の変形例について説明する。図５（Ａ）に正
面図で、（Ｂ）に側面図で示すせん断補強部材３６は、
上弦材４０と斜材４２の上辺部４２０４との固定箇所が
図３に示すせん断補強部材３６と異なっている。すなわ
ち、図５に示すせん断補強部材３６では、斜材４２を含
む面に対して直交する方向において上弦材４０と斜材４
２の上辺部４２０４が固定され、これによりせん断補強
部材の高さを小さくする上で有利となっている。図６
（Ａ）に正面図で、（Ｂ）に側面図で示すせん断補強部
材３６は、底辺部４２０２と上辺部４２０４の形状が図
５に示すせん断補強部材３６と異なっている。すなわ
ち、底辺部４２０２と上辺部４２０４はそれぞれ直線状
ではなく湾曲状に形成されており、底辺部４２０２と上
辺部４２０４をこのような形状にすることで底辺部４２
０２と上辺部４２０４を簡単に加工でき、斜材４２のコ
ストダウンを図る上で有利となっている。なお、図５お
よび図６に示すせん断補強部材３６によっても図１、図
２、図４に示すハーフＰＣ床部材１２および鉄筋コンク
リート造床スラブ３０が得られることは無論のことであ
る。Next, a modification of the shear reinforcing member 36 will be described with reference to FIGS. The shear reinforcing member 36 shown in a front view in FIG. 5A and a side view in FIG.
The fixing point between the upper chord member 40 and the upper side 4204 of the diagonal member 42 is different from the shear reinforcing member 36 shown in FIG. That is, in the shear reinforcing member 36 shown in FIG.
The upper side 4204 is fixed, which is advantageous in reducing the height of the shear reinforcing member. FIG.
The shear reinforcement member 36 shown in the front view in FIG. 5A and the side view in FIG. 5B differs from the shear reinforcement member 36 shown in FIG. That is, the bottom portion 4202 and the upper side portion 4204 are formed not in a straight line but in a curved shape, respectively, and by forming the bottom portion 4202 and the upper side portion 4204 in such a shape, the bottom portion 42
02 and the upper side 4204 can be easily processed, which is advantageous in reducing the cost of the diagonal member 42. It is a matter of course that the half PC floor member 12 and the reinforced concrete floor slab 30 shown in FIGS. 1, 2 and 4 can also be obtained by the shear reinforcing member 36 shown in FIGS.

【００１９】次に、図７乃至図９を参照して第３の実施
の形態について説明する。図７（Ａ）はせん断補強部材
の正面図、（Ｂ）は同側面図、図８は鉄筋コンクリート
造床スラブの断面正面図、図９は同断面側面図を示す。
第３の実施の形態に係るハーフＰＣ床部材３２は、図
８、図９に示すように、コンクリート部３２０２と、こ
のコンクリート部３２０２の底部に格子状に埋め込まれ
た複数の床スラブ下端鉄筋３２０４（図８では省略）
と、それら床スラブ下端鉄筋３２０４上に配置され下部
がコンクリート部３２０２に埋め込まれた複数のせん断
補強部材５６から構成されている。Next, a third embodiment will be described with reference to FIGS. 7A is a front view of the shear reinforcing member, FIG. 7B is a side view of the same, FIG. 8 is a sectional front view of a reinforced concrete floor slab, and FIG. 9 is a sectional side view of the same.
As shown in FIGS. 8 and 9, a half PC floor member 32 according to the third embodiment has a concrete portion 3202 and a plurality of floor slab lower end reinforcing bars 3204 embedded in a lattice at the bottom of the concrete portion 3202. (Omitted in FIG. 8)
And a plurality of shear reinforcing members 56 disposed on the lower reinforcing bar 3204 of the floor slab and having a lower portion embedded in the concrete portion 3202.

【００２０】前記せん断補強部材５６は、図７（Ａ）、
（Ｂ）に示すように、１枚の鋼板からなり曲げ補強筋と
して機能する上部材５７と、１本の構造用鉄筋からなり
せん断補強筋として機能する斜材５８と、１本の構造用
鉄筋からなり曲げ補強筋として機能する底部材５９とを
備え、せん断補強部材３６は格子状に配置されずコンク
リート部３２０２の一辺に平行させて複数設けられてい
る。前記上部材５７は細い幅を有して直線状に延在形成
されており、本実施の形態ではこのように上部材５７と
して鋼板を用いているので、特に、横方向の座屈に対し
て強く、水平方向のたわみを阻止でき、ロングスパンに
対して有利となっている。前記斜材５８は、前記上部材
５７の幅方向のほぼ中央で上部材５７の長手方向に等間
隔をおいた箇所に固定された多数の上辺部５８０２と、
前記上部材５７に平行して延在する直線上に位置するよ
うに配置された多数の底辺部５８０４と、これら上辺部
５８０２の端部と底辺部５８０４の端部とを順次連結す
る連結部５８０６とから波形に形成されている。なお、
加工が簡単になされるように上辺部５８０２と底辺部５
８０４は湾曲状に（上辺部５８０２を挟んだ両側の連結
部５８０６のなす角度および底辺部５８０４を挟んだ両
側の連結部５８０６のなす角度が共に６０度となるよう
に）形成されているが、図３に符号４２０２、４２０４
で示す上辺部や底辺部のように直線状に形成するように
してもよい。前記底部材５９は前記上部材５７と平行し
て延在し前記多数の底辺部５８０４にそれぞれ溶接によ
り固定され、底部材５９と斜材５８の底辺部５８０４も
床スラブ下端鉄筋３２０４に溶接により固定されてい
る。The shear reinforcing member 56 is shown in FIG.
As shown in (B), an upper member 57 made of one steel plate and functioning as a bending reinforcing bar, a diagonal member 58 made of one structural reinforcing bar and functioning as a shear reinforcing bar, and one structural reinforcing bar And a bottom member 59 that functions as a bending reinforcing bar, and a plurality of shear reinforcing members 36 are provided in parallel with one side of the concrete portion 3202 without being arranged in a lattice shape. The upper member 57 has a narrow width and is formed to extend linearly. In the present embodiment, since the steel plate is used as the upper member 57 in this manner, in particular, for the lateral buckling, Strong, can prevent horizontal deflection, which is advantageous for long span. The diagonal member 58 includes a number of upper side portions 5802 fixed at substantially equal centers in the width direction of the upper member 57 and at regular intervals in the longitudinal direction of the upper member 57,
A number of bottom portions 5804 arranged so as to be located on a straight line extending in parallel with the upper member 57, and a connecting portion 5806 for sequentially connecting the ends of the top side 5802 and the ends of the bottom portion 5804. And are formed in a waveform. In addition,
The top 5802 and the bottom 5 to facilitate processing
804 is formed in a curved shape (so that the angle formed by the connecting portions 5806 on both sides sandwiching the upper side 5802 and the angle formed by the connecting portions 5806 on both sides sandwiching the bottom portion 5804 are both 60 degrees), FIG.
It may be formed in a straight line like a top side or a bottom side indicated by. The bottom member 59 extends in parallel with the upper member 57 and is fixed to the plurality of bottom portions 5804 by welding. The bottom member 59 and the bottom portion 5804 of the diagonal member 58 are also fixed to the bottom reinforcing bar 3204 of the floor slab by welding. Have been.

【００２１】本実施の形態では、前記斜材５８を含む面
に対して直交する方向において底部材５９と斜材５８の
底辺部５８０４が固定されているが、図７（Ｂ）に５
９'で示すように、前記斜材５８と底部材５９が単一の
平面内に含まれるように底部材５９と斜材５８の底辺部
５８０４を固定するようにしてもよい。なお、前記斜材
５８を含む面に対して直交する方向において底部材５９
と斜材５８の底辺部５８０４とを固定すると、せん断補
強部材５６の高さを小さくする上で有利となり、また、
底部材５９の上面上に位置するコンクリートの面積が大
きくなるため引き抜き強度を高める上でも有利となる。
そして、斜材５８を含む平面がコンクリート部３２０２
の厚さ方向に平行する方向に延在し、かつ、前記上部材
５７がコンクリート部３２０２の厚さ方向に臨む面に平
行して延在するようにせん断補強部材５６の一部がコン
クリート部３２０２に埋設されている。より詳細には、
斜材５８の連結部５８０６の下半部と底辺部５８０４の
全ての部分がコンクリート部３２０２に埋設され、上部
材５７がコンクリート部３２０２の表面の上方で表面に
平行して延在するように斜材５８の連結部５８０６の上
半部と上部材５７がコンクリート部３２０２の表面の上
方に露出している。In the present embodiment, the bottom member 59 and the bottom side 5804 of the diagonal member 58 are fixed in a direction perpendicular to the plane including the diagonal member 58, but FIG.
As shown by 9 ', the bottom member 59 and the bottom side 5804 of the diagonal member 58 may be fixed so that the diagonal member 58 and the bottom member 59 are included in a single plane. In addition, the bottom member 59 in a direction orthogonal to the plane including the diagonal member 58
And the bottom portion 5804 of the diagonal member 58 are fixed, which is advantageous in reducing the height of the shear reinforcing member 56, and
Since the area of the concrete located on the upper surface of the bottom member 59 is increased, it is advantageous in increasing the pull-out strength.
The plane including the diagonal member 58 is the concrete part 3202
A part of the shear reinforcing member 56 extends in the direction parallel to the thickness direction of the concrete portion 3202 so that the upper member 57 extends in parallel with the surface of the concrete portion 3202 facing the thickness direction. Buried in More specifically,
All of the lower half and the bottom 5804 of the connecting portion 5806 of the diagonal member 58 are embedded in the concrete portion 3202, and the upper member 57 extends above the surface of the concrete portion 3202 and extends parallel to the surface. The upper half of the connecting portion 5806 of the material 58 and the upper member 57 are exposed above the surface of the concrete portion 3202.

【００２２】そして、このようなハーフＰＣ床部材３２
が平面的に並べられ、上部材５７の上に床スラブ上端鉄
筋５２（図８では省略）が格子状に配筋され溶着固定さ
れた後、現場打ちコンクリート床部５０が後打ちされて
鉄筋コンクリート造床スラブ３０が得られる。第３の実
施の形態のハーフＰＣ部材３２によれば、従来の組立鉄
筋１６に代わりせん断補強部材５６がコンクリート打継
ぎ面のせん断補強部材として機能し、また、現場打ちコ
ンクリート床部５０に配設される床スラブ上端鉄筋（床
主筋）の位置決め・固定機能、更には、ハーフＰＣ床部
材３２自体の曲げ剛性を高め、製造・運搬・建て込み等
のハンドリング時の部材破損防止機能が奏される。そし
て、せん断補強部材５６は上部材５７と、斜材５８と、
底部材５９との３つの部材からなる簡単な構成でコスト
ダウンを図ることが可能となる。さらに、コストダウン
を図れることから、従来、コストの面で制約を受けてい
た種々の分野にも利用できるようになり、ハーフＰＣ部
材３２の実用的価値を格段と高めることも可能となる。Then, such a half PC floor member 32
Are laid out in a plane, and the upper reinforcing bar 52 of the floor slab 52 (omitted in FIG. 8) is laid in a grid pattern on the upper member 57 and fixed by welding. A floor slab 30 is obtained. According to the half PC member 32 of the third embodiment, the shear reinforcing member 56 functions as a shear reinforcing member of the concrete joint surface instead of the conventional assembled reinforcing bar 16 and is disposed on the cast-in-place concrete floor portion 50. The function of positioning and fixing the upper reinforcing bar (floor main bar) of the floor slab, and the function of increasing the bending rigidity of the half PC floor member 32 itself, and preventing the member from being damaged during handling such as manufacturing, transportation, and erection. . And the shear reinforcing member 56 includes an upper member 57, a diagonal member 58,
The cost can be reduced with a simple configuration including the bottom member 59 and three members. Further, since the cost can be reduced, it can be used in various fields which have been conventionally restricted in terms of cost, and the practical value of the half PC member 32 can be significantly increased.

【００２３】次に、図１０、図１１を参照して第４の実
施の形態について説明する。図１０は鉄筋コンクリート
造床スラブの断面正面図、図１１は同断面側面図を示
す。第４の実施の形態に係るハーフＰＣ床部材３２は、
コンクリート部３２０２と、このコンクリート部３２０
２に格子状に埋め込まれた複数の床スラブ下端鉄筋３２
０４（図１０では省略）と、それら床スラブ下端鉄筋３
２０４上に配置され下部がコンクリート部３２０２に埋
め込まれた複数のせん断補強部材５６から構成されてい
る。せん断補強部材５６の構成は前記第３の実施の形態
と同一で、コンクリート部３２０２の一辺に平行させて
複数設けられ、せん断補強部材５６の上部材５７、斜材
５８の上辺部５８０２、連結部５８０６の上半部がコン
クリート部３２の表面から露出している。Next, a fourth embodiment will be described with reference to FIGS. FIG. 10 is a sectional front view of a reinforced concrete floor slab, and FIG. 11 is a sectional side view of the same. The half PC floor member 32 according to the fourth embodiment includes:
Concrete part 3202 and this concrete part 320
Plural floor slab lower end reinforcing bars 32 embedded in a grid pattern 2
04 (omitted in FIG. 10),
The lower portion is constituted by a plurality of shear reinforcing members 56 disposed on the concrete portion 204 and embedded in the concrete portion 3202. The configuration of the shear reinforcing member 56 is the same as that of the third embodiment, and a plurality of shear reinforcing members 56 are provided in parallel with one side of the concrete portion 3202, and the upper member 57 of the shear reinforcing member 56, the upper side 5802 of the diagonal member 58, the connecting portion The upper half of 5806 is exposed from the surface of the concrete part 32.

【００２４】このようなハーフＰＣ床部材３２が平面的
に並べられ、上部材５７の上に、直接またはスペーサを
介して床スラブ上端鉄筋５２（図１０では省略）が格子
状に配筋された後、現場打ちコンクリート床部５０が後
打ちされて鉄筋コンクリート造床スラブ３０が得られ
る。なお、図１１において符号５４は中空部を示してお
り、この中空部５４はエスレンボイド型枠を用いること
で形成される。また、中空部５４を、第２の実施の形態
と同様に廃棄プラスチックをブロック状に再形成したリ
サイクルブロックを用いることで形成することも可能で
ある。この場合には、現場打ちコンクリート床部５０を
後打ちする前に、ハーフＰＣ床部材３２の上にリサイク
ルブロックを固定しておき、現場打ちコンクリート床部
５０を後打ちしてリサイクルブロックをコンクリート中
に埋め込むことになる。The half PC floor members 32 are arranged in a plane, and the upper reinforcing bar 52 (not shown in FIG. 10) of the floor slab upper end bar 52 is arranged on the upper member 57 directly or via a spacer. Thereafter, the cast-in-place concrete floor section 50 is post-punched, and the reinforced concrete floor slab 30 is obtained. In FIG. 11, reference numeral 54 indicates a hollow portion, and the hollow portion 54 is formed by using an ethlenoid mold. Further, the hollow portion 54 can be formed by using a recycle block in which waste plastic is reformed into a block shape as in the second embodiment. In this case, before the cast-in-place concrete floor portion 50 is post-cast, the recycled block is fixed on the half PC floor member 32, and the cast-in-place concrete floor portion 50 is post-cast and the recycled block is placed in concrete. Will be embedded in

【００２５】次に、図１２（Ａ）、（Ｂ）、（Ｃ）を参
照して第５乃至第７の実施の形態について説明する。第
５の実施の形態に係るハーフＰＣ床部材３２は、図１２
（Ａ）に断面図で示すように、コンクリート部３２０２
と、このコンクリート部３２０２の底部に格子状に埋め
込まれた複数の床スラブ下端鉄筋３２０４（図１２では
省略）と、それら床スラブ下端鉄筋３２０４上に配置さ
れ下部がコンクリート部３２０２に埋め込まれた複数の
せん断補強部材６２から構成されている。せん断補強部
材６２として本実施の形態ではＨ形鋼（またはＩ形鋼）
が用いられており、せん断補強部材６２は、互いに対向
する上フランジ６２０２および下フランジ６２０４と、
これら上フランジ６２０２と下フランジ６２０４間を連
結するウェブ６２０６とを備えている。そして、前記下
フランジ６２０４が床スラブ下端鉄筋３２０４（図１２
では省略）に固定され、下フランジ６２０４と、フェブ
６２０６の下フランジ６２０４寄り部分がコンクリート
部３２０２に埋設されている。せん断補強部材６２はコ
ンクリート部３２０２の一辺に平行させて複数設けら
れ、上フランジ６２０２およびウェブ６２０６の中間部
から上部にかけてコンクリート部３２の表面から露出し
ている。Next, fifth to seventh embodiments will be described with reference to FIGS. 12 (A), 12 (B) and 12 (C). The half PC floor member 32 according to the fifth embodiment is similar to the half PC floor member 32 shown in FIG.
As shown in the sectional view of FIG.
And a plurality of floor slab lower end reinforcing bars 3204 (omitted in FIG. 12) embedded in a lattice at the bottom of the concrete portion 3202, and a plurality of lower portions laid on the floor slab lower end reinforcing bars 3204 and embedded in the concrete portion 3202. Of the shear reinforcing member 62. In the present embodiment, the shear reinforcing member 62 is an H-beam (or an I-beam).
Are used, and the shear reinforcing member 62 includes an upper flange 6202 and a lower flange 6204 facing each other,
A web 6206 connecting between the upper flange 6202 and the lower flange 6204 is provided. The lower flange 6204 is connected to the floor slab lower end reinforcing bar 3204 (FIG. 12).
, And the lower flange 6204 and the portion near the lower flange 6204 of the feb 6206 are embedded in the concrete portion 3202. A plurality of the shear reinforcing members 62 are provided in parallel with one side of the concrete portion 3202, and are exposed from the surface of the concrete portion 32 from the middle portion to the upper portion of the upper flange 6202 and the web 6206.

【００２６】そして、このようなハーフＰＣ床部材３２
が平面的に並べられ、上フランジ６２０２の上に床スラ
ブ上端鉄筋５２（図１２では省略）が格子状に配筋され
た後、現場打ちコンクリート床部５０が後打ちされて鉄
筋コンクリート造床スラブ３０が得られる。第５の実施
の形態のハーフＰＣ部材３２によれば、従来の組立鉄筋
１６に代わりせん断補強部材６２がコンクリート打継ぎ
面のせん断補強部材として機能し、また、現場打ちコン
クリート床部５０に配設される床スラブ上端鉄筋（床主
筋）の位置決め・固定機能、更には、ハーフＰＣ床部材
３２自体の曲げ剛性を高め、製造・運搬・建て込み等の
ハンドリング時の部材破損防止機能が奏される。そし
て、せん断補強部材６２はＨ形鋼（またはＩ形鋼）であ
り、市販品を使用できるので、ハーフＰＣ部材３２のコ
ストダウンを図る上でより一層有利となり、コストダウ
ンを図れることから、従来、コストの面で制約を受けて
いた種々の分野にも利用でき、ハーフＰＣ部材３２の実
用的価値を格段と高めることが可能となる。Then, such a half PC floor member 32
Are laid out in a plane, and the reinforcing bar 52 at the upper end of the floor slab (not shown in FIG. 12) is arranged in a grid pattern on the upper flange 6202, and then the cast-in-place concrete floor portion 50 is post-punched to form the reinforced concrete floor slab 30. Is obtained. According to the half PC member 32 of the fifth embodiment, the shear reinforcing member 62 functions as a shear reinforcing member of the concrete joint surface instead of the conventional assembled reinforcing bar 16 and is disposed on the cast-in-place concrete floor portion 50. The function of positioning and fixing the upper reinforcing bar (floor main bar) of the floor slab, and the function of increasing the bending rigidity of the half PC floor member 32 itself, and preventing the member from being damaged during handling such as manufacturing, transportation, and erection. . Since the shear reinforcing member 62 is an H-section steel (or I-section steel) and a commercially available product can be used, it is more advantageous in reducing the cost of the half PC member 32, and the cost can be reduced. In addition, the half PC member 32 can be used in various fields that have been restricted in terms of cost, and the practical value of the half PC member 32 can be significantly increased.

【００２７】第６の実施の形態に係るハーフＰＣ床部材
３２は、図１２（Ｂ）に断面図で示すように、コンクリ
ート部３２０２と、このコンクリート部３２０２に格子
状に埋め込まれた複数の床スラブ下端鉄筋３２０４（図
１２では省略）と、それら床スラブ下端鉄筋３２０４上
に配置され下部がコンクリート部３２０２に埋め込まれ
た複数のせん断補強部材６４から構成されている。せん
断補強部材６４として本実施の形態では溝形鋼が用いら
れており、せん断補強部材６４は、互いに対向する上フ
ランジ６４０２および下フランジ６４０４と、これら上
フランジ６４０２と下フランジ６４０４間を連結するウ
ェブ６４０６とを備えている。そして、前記下フランジ
６４０４が床スラブ下端鉄筋３２０４（図１２では省
略）に固定され、下フランジ６４０４と、フェブ６４０
６の下フランジ６４０４寄り部分がコンクリート部３２
０２に埋設されている。せん断補強部材６４はコンクリ
ート部３２０２の一辺に平行させて複数設けられ、上フ
ランジ６４０２およびウェブ６４０６の中間部から上部
にかけてコンクリート部３２の表面から露出している。The half PC floor member 32 according to the sixth embodiment has a concrete portion 3202 and a plurality of floors embedded in the concrete portion 3202 in a grid pattern as shown in a sectional view of FIG. It is composed of a slab lower end reinforcing bar 3204 (omitted in FIG. 12) and a plurality of shear reinforcing members 64 arranged on the floor slab lower end reinforcing bar 3204 and embedded in the concrete portion 3202 at the lower portion. In this embodiment, a channel steel is used as the shear reinforcing member 64, and the shear reinforcing member 64 includes an upper flange 6402 and a lower flange 6404 facing each other, and a web connecting the upper flange 6402 and the lower flange 6404. 6406. Then, the lower flange 6404 is fixed to a floor slab lower end reinforcing bar 3204 (omitted in FIG. 12), and the lower flange 6404 and the feb 640 are fixed.
6 near the lower flange 6404 is the concrete portion 32
02. A plurality of shear reinforcing members 64 are provided in parallel with one side of the concrete portion 3202, and are exposed from the surface of the concrete portion 32 from the middle portion to the upper portion of the upper flange 6402 and the web 6406.

【００２８】そして、このようなハーフＰＣ床部材３２
が平面的に並べられ、上フランジ６４０２の上に床スラ
ブ上端鉄筋５２（図１２では省略）が格子状に配筋され
た後、現場打ちコンクリート床部５０が後打ちされて鉄
筋コンクリート造床スラブ３０が得られる。第６の実施
の形態のハーフＰＣ部材３２によっても、従来の組立鉄
筋１６に代わりせん断補強部材６４がコンクリート打継
ぎ面のせん断補強部材として機能し、また、床スラブ上
端鉄筋（床主筋）の位置決め・固定機能、更には、ハー
フＰＣ床部材３２自体の曲げ剛性を高め、ハンドリング
時の部材破損防止機能が奏される。そして、せん断補強
部材６４は溝形鋼であり、市販品を使用できるので、ハ
ーフＰＣ部材３２のコストダウンを図る上でより一層有
利となり、ハーフＰＣ部材３２の実用的価値を格段と高
めることが可能となる。Then, such a half PC floor member 32
Are arranged in a plane, and the upper reinforcing bar 52 of the floor slab (not shown in FIG. 12) is arranged in a grid pattern on the upper flange 6402, and then the cast-in-place concrete floor portion 50 is post-punched to form the reinforced concrete floor slab 30. Is obtained. Also in the half PC member 32 of the sixth embodiment, the shear reinforcing member 64 functions as a shear reinforcing member for the concrete joint surface instead of the conventional assembled reinforcing bar 16, and also positions the upper reinforcing bar (floor main bar) of the floor slab. The fixing function, and further, the bending rigidity of the half PC floor member 32 itself is increased, and the member damage preventing function at the time of handling is exhibited. Since the shear reinforcing member 64 is a channel steel, and a commercially available product can be used, it is more advantageous in reducing the cost of the half PC member 32, and the practical value of the half PC member 32 can be significantly increased. It becomes possible.

【００２９】第７の実施の形態に係るハーフＰＣ床部材
３２は、図１２（Ｃ）に断面図で示すように、コンクリ
ート部３２０２と、コンクリート部３２０２に埋め込ま
れた複数のせん断補強部材６６から構成されている。せ
ん断補強部材６６として本実施の形態では溝形鋼が用い
られており、せん断補強部材６６は、互いに対向する上
フランジ６６０２および下フランジ６６０４と、これら
上フランジ６６０２と下フランジ６６０４間を連結する
ウェブ６６０６とを備え、第７の実施の形態では、エン
ボス加工によりウェブ６６０６に複数の開口部６６１２
が形成されている。The half PC floor member 32 according to the seventh embodiment includes a concrete portion 3202 and a plurality of shear reinforcing members 66 embedded in the concrete portion 3202, as shown in a sectional view of FIG. It is configured. In this embodiment, a channel steel is used as the shear reinforcing member 66, and the shear reinforcing member 66 includes an upper flange 6602 and a lower flange 6604 opposed to each other, and a web connecting the upper flange 6602 and the lower flange 6604. In the seventh embodiment, a plurality of openings 6612 are formed in the web 6606 by embossing.
Are formed.

【００３０】この第７の実施の形態について図１３、図
１４を参照してさらに詳細に説明する。図１３はハーフ
ＰＣ床部材と、それらの上面に後打ちされた現場打ちコ
ンクリート床部からなる鉄筋コンクリート造床スラブの
分解斜視図、図１４（Ａ）はせん断補強部材の断面側面
図、（Ｂ）は同正面図を示す。第７の実施の形態に係る
ハーフＰＣ床部材３２では、せん断補強部材６６として
ウェブ６６０６に複数の開口部６６１２が形成された溝
形鋼が用いられている。前記複数の開口部６６１２は、
図１４（Ｂ）に示すように、ウェブ６６０６の長手方向
に間隔をおいて台形状の開口部６６１２がウェブ６６０
６の幅方向の中央で向かい合うように形成され、また、
それらの間に菱形状の開口部６６１２が位置するように
形成されている。このような溝形鋼として、例えば、住
友金属建材社の商品名「ＳＬ形鋼」を使用可能である。The seventh embodiment will be described in more detail with reference to FIGS. FIG. 13 is an exploded perspective view of a reinforced concrete floor slab including a half PC floor member and a cast-in-place concrete floor portion that has been post-cast on the upper surface thereof, FIG. 14A is a cross-sectional side view of a shear reinforcing member, and FIG. Shows the front view. In the half PC floor member 32 according to the seventh embodiment, a channel steel in which a plurality of openings 6612 are formed in a web 6606 is used as the shear reinforcing member 66. The plurality of openings 6612 are
As shown in FIG. 14B, trapezoidal openings 6612 are formed at intervals in the longitudinal direction of the web 6606 to form the web 660.
6 are formed so as to face each other at the center in the width direction, and
A diamond-shaped opening 6612 is formed between them. As such a channel steel, for example, a trade name “SL shape steel” of Sumitomo Metal Building Materials Co., Ltd. can be used.

【００３１】前記複数の開口部６６１２によるせん断補
強の作用・効果は、コンクリートの打継ぎ面に対するも
のではなく、形鋼と該形鋼が埋め込まれる周囲のコンク
リートとが一体化するように、即ち、床スラブが外力を
受けた際、形鋼がその延在方向に移動して周囲のコンク
リートと鋼材面との縁が切れてしまうことが無いよう
に、補強するためのものであり、本実施の形態では開口
部６６１２が特許請求の範囲のせん断補強手段に相当し
ている。このようなせん断補強手段は、上フランジ６６
０２、下フランジ６６０４、ウェブ６６０６の全てある
いは何れかに設ければよく、せん断補強手段としてはエ
ンボス加工により形成された開口部の他、バーリング加
工で形成された突起や、あるいは突起物が溶着されるこ
とで構成される。The action and effect of the shear reinforcement by the plurality of openings 6612 are not to the joint surface of concrete, but to integrate the shaped steel with the surrounding concrete in which the shaped steel is embedded, that is, When the floor slab is subjected to external force, the section steel is reinforced so that it does not move in the extending direction and the edge between the surrounding concrete and the steel material surface is cut off. In the embodiment, the opening 6612 corresponds to the shear reinforcing means in the claims. Such a shear reinforcing means is provided by the upper flange 66.
02, the lower flange 6604, and the web 6606 may be provided on all or any of them. As the shear reinforcing means, in addition to the opening formed by embossing, a projection formed by burring or a projection is welded. It is composed of

【００３２】そして、前記下フランジ６６０４が床スラ
ブ下端鉄筋３２０４に固定され、下フランジ６６０４
と、フェブ６６０６の下フランジ６６０４寄り部分がコ
ンクリート部３２０２に埋設されている。せん断補強部
材６６はコンクリート部３２０２の一辺に平行させて複
数設けられ、上フランジ６６０２およびウェブ６６０６
の中間部から上部にかけてコンクリート部３２の表面か
ら露出している。そして、このようなハーフＰＣ床部材
３２が平面的に並べられ、上フランジ６６０２の上に床
スラブ上端鉄筋５２が格子状に配筋された後、現場打ち
コンクリート床部５０が後打ちされて鉄筋コンクリート
造床スラブ３０が得られる。Then, the lower flange 6604 is fixed to the reinforcing bar 3204 at the lower end of the floor slab.
In this case, the portion near the lower flange 6604 of the feb 6606 is embedded in the concrete portion 3202. A plurality of shear reinforcing members 66 are provided in parallel with one side of the concrete portion 3202, and the upper flange 6602 and the web 6606 are provided.
Is exposed from the surface of the concrete part 32 from the middle part to the upper part. Then, such half-PC floor members 32 are arranged in a plane, and the upper reinforcing bar 52 of the floor slab is arranged on the upper flange 6602 in a lattice shape. The floor slab 30 is obtained.

【００３３】なお、符号５４は中空部を示しており、こ
の中空部５４は、図４や図１１に示す場合と同様で、エ
スレンボイド型枠や、廃棄プラスチックをブロック状に
再形成したリサイクルブロックを用いることで形成され
る。第７の実施の形態のハーフＰＣ部材３２によって
も、従来の組立鉄筋１６に代わりせん断補強部材６６が
コンクリート打継ぎ面のせん断補強部材として機能し、
また、床スラブ上端鉄筋（床主筋）の位置決め・固定機
能、更には、ハーフＰＣ床部材３２自体の曲げ剛性を高
め、ハンドリング時の部材破損防止機能が奏される。そ
して、せん断補強部材６６は溝形鋼であり、市販品を使
用できるので、ハーフＰＣ部材３２のコストダウンを図
る上でより一層有利となり、ハーフＰＣ部材３２の実用
的価値を格段と高めることが可能となる。Reference numeral 54 denotes a hollow portion. This hollow portion 54 is similar to the case shown in FIG. 4 and FIG. 11, and is made of an ethlen void mold or a recycled block in which waste plastic is reformed into a block shape. It is formed by using. Also according to the half PC member 32 of the seventh embodiment, the shear reinforcing member 66 functions as a shear reinforcing member for the concrete joint surface instead of the conventional assembled reinforcing bar 16,
Further, the function of positioning and fixing the upper reinforcing bar (floor main bar) of the floor slab, the function of increasing the bending rigidity of the half PC floor member 32 itself, and the function of preventing damage to the member during handling are provided. Further, since the shear reinforcing member 66 is a channel steel and a commercially available product can be used, it is more advantageous in reducing the cost of the half PC member 32, and the practical value of the half PC member 32 can be significantly increased. It becomes possible.

【００３４】なお、本実施の形態ではハーフＰＣ部材が
ハーフＰＣ床部材であり、鉄筋コンクリート造床スラブ
を施工する場合について説明したが、ハーフＰＣ部材を
ハーフＰＣ壁部材とした場合には、鉄筋コンクリート造
壁体が施工される。この場合には、図１、図２、図８乃
至図１３に示されるハーフＰＣ部材（ハーフＰＣ壁部
材）３２が建設物の所定壁位置に、該壁の表裏両面の一
方を構成するように建て込まれ、該壁の表裏両面の他方
を構成するように通常の型枠または通常のハーフＰＣ壁
部材を建て込んで後打ちコンクリート用空間部を形成
し、次いで、該空間部に後打ちコンクリートを打設する
ことで壁体が施工される。なお、ハーフＰＣ部材をハー
フＰＣ壁部材とした場合には、図２、図４、図９、図１
１、図１３に示される床スラブ下端鉄筋３２０４は壁主
筋となる。In this embodiment, the case where the half-PC member is a half-PC floor member and a reinforced concrete floor slab is constructed has been described. A wall is constructed. In this case, the half PC member (half PC wall member) 32 shown in FIGS. 1, 2, and 8 to 13 constitutes one of the front and back surfaces of the wall at a predetermined wall position of the building. A normal formwork or a normal half PC wall member is erected so as to constitute the other of the front and back surfaces of the wall to form a space for a post-cast concrete, and then a post-cast concrete space is formed in the space. The wall body is constructed by casting. In the case where the half PC member is a half PC wall member, FIGS.
1. The floor slab lower end reinforcing bar 3204 shown in FIG. 13 is the main wall reinforcing bar.

【００３５】[0035]

【発明の効果】以上の説明で明らかなように本発明によ
るせん断補強部材は、２素材または３素材または単一素
材のみで構成されるため、加工組立工程が極めて単純と
なり、その製作コストおよび該部材を用いたハーフＰＣ
部材の製作コスト、および床スラブや壁体の施工コスト
を相当に低減できる。したがって、本発明のハーフＰＣ
部材を用いれば型枠用木材の使用量を削減でき熱帯雨林
等の保護に役立つ他、木製型枠の使用に伴う型枠廃材の
発生も防ぐことができ、また、中空部を作成する場合に
おいても廃棄プラスチックをリサイクル利用すれば、建
築工事に関連する環境問題に貢献できる。As is apparent from the above description, since the shear reinforcing member according to the present invention is composed of only two materials, three materials or a single material, the processing and assembling process becomes extremely simple, and the manufacturing cost and the manufacturing cost are reduced. Half PC using members
The production cost of members and the construction cost of floor slabs and walls can be considerably reduced. Therefore, the half PC of the present invention
The use of materials can reduce the amount of timber for formwork and help protect tropical rain forests, etc., can also prevent the generation of formwork waste due to the use of wooden formwork, and when creating hollow parts Recycling of waste plastic can also contribute to environmental issues related to construction work.

[Brief description of the drawings]

【図１】ハーフＰＣ床部材と、それらの上面に後打ちさ
れた現場打ちコンクリート床部からなる鉄筋コンクリー
ト造床スラブの分解斜視図である。FIG. 1 is an exploded perspective view of a reinforced concrete floor slab including a half PC floor member and a cast-in-place concrete floor portion that is post-cast on the upper surface thereof.

【図２】鉄筋コンクリート造床スラブの断面図である。FIG. 2 is a sectional view of a reinforced concrete floor slab.

【図３】（Ａ）はせん断補強部材の正面図、（Ｂ）は同
側面図である。3A is a front view of the shear reinforcing member, and FIG. 3B is a side view of the same.

【図４】中空部を有する鉄筋コンクリート造床スラブの
断面図である。FIG. 4 is a sectional view of a reinforced concrete floor slab having a hollow portion.

【図５】（Ａ）はせん断補強部材の正面図、（Ｂ）は同
側面図である。FIG. 5A is a front view of a shear reinforcing member, and FIG. 5B is a side view of the same.

【図６】（Ａ）はせん断補強部材の正面図、（Ｂ）は同
側面図である。6A is a front view of a shear reinforcing member, and FIG. 6B is a side view of the same.

【図７】（Ａ）はせん断補強部材の正面図、（Ｂ）は同
側面図である。FIG. 7A is a front view of a shear reinforcing member, and FIG. 7B is a side view of the same.

【図８】鉄筋コンクリート造床スラブの断面正面図であ
る。FIG. 8 is a sectional front view of a reinforced concrete floor slab.

【図９】鉄筋コンクリート造床スラブの断面側面図であ
る。FIG. 9 is a sectional side view of a reinforced concrete floor slab.

【図１０】中空部を有する鉄筋コンクリート造床スラブ
の断面正面図である。FIG. 10 is a sectional front view of a reinforced concrete floor slab having a hollow portion.

【図１１】中空部を有する鉄筋コンクリート造床スラブ
の断面側面図である。FIG. 11 is a sectional side view of a reinforced concrete floor slab having a hollow portion.

【図１２】（Ａ）乃至（Ｃ）はせん断補強部材として形
鋼を用いた鉄筋コンクリート造床スラブの断面図であ
る。FIGS. 12A to 12C are cross-sectional views of a reinforced concrete floor slab using a shaped steel as a shear reinforcing member.

【図１３】中空部を有する鉄筋コンクリート造床スラブ
の断面図である。FIG. 13 is a sectional view of a reinforced concrete floor slab having a hollow portion.

【図１４】（Ａ）はせん断補強部材の断面側面図、
（Ｂ）は同正面図を示す。FIG. 14A is a sectional side view of a shear reinforcing member,
(B) shows the front view.

【図１５】複数のハーフＰＣ床部材と、それらの上面に
後打ちされた現場打ちコンクリート床部からなる鉄筋コ
ンクリート造床スラブの分解斜視図である。FIG. 15 is an exploded perspective view of a reinforced concrete floor slab including a plurality of half-PC floor members and a cast-in-place concrete floor portion that is post-punched on the upper surfaces thereof.

【図１６】ハーフＰＣ床部材と、その上面に後打ちされ
た現場打ちコンクリート床部からなる鉄筋コンクリート
造床スラブの断面図である。FIG. 16 is a cross-sectional view of a reinforced concrete floor slab including a half PC floor member and a cast-in-place concrete floor portion that is post-cast on the upper surface thereof.

【図１７】ハーフＰＣ床部材と、その上面にエスレンボ
イド型枠を用いて後打ちされた現場打ちコンクリート床
部からなる鉄筋コンクリート造床スラブの断面図であ
る。FIG. 17 is a cross-sectional view of a reinforced concrete floor slab composed of a half PC floor member and a cast-in-place concrete floor portion that has been post-punched with an eslenoid mold on the upper surface thereof.

【図１８】組立鉄筋の斜視図である。FIG. 18 is a perspective view of an assembled reinforcing bar.

[Explanation of symbols]

３０鉄筋コンクリート造床スラブ３２ハーブＰＣ床部材３６、５６、６２、６４、６６せん断補強部材４０上弦材４２斜材５０現場打ちコンクリート床部５４中空部５７上部材５８斜材５９底部材３２０２コンクリート部３２０４床スラブ下端鉄筋 Reference Signs List 30 reinforced concrete floor slab 32 herb PC floor member 36, 56, 62, 64, 66 shear reinforcing member 40 upper chord material 42 diagonal member 50 cast-in-place concrete floor portion 54 hollow portion 57 upper member 58 diagonal member 59 bottom member 3202 concrete portion 3204 Floor slab bottom reinforcement

───────────────────────────────────────────────────── フロントページの続き (72)発明者佐々木仁東京都渋谷区千駄ヶ谷四丁目６番15号株式会社フジタ内 (72)発明者荒井高志東京都渋谷区千駄ヶ谷四丁目６番15号株式会社フジタ内 (72)発明者大井康敬東京都渋谷区千駄ヶ谷四丁目６番15号株式会社フジタ内 (72)発明者山川和夫東京都渋谷区千駄ヶ谷四丁目６番15号株式会社フジタ内 (72)発明者坂本富雄東京都渋谷区千駄ヶ谷四丁目６番15号株式会社フジタ内 (72)発明者市川修東京都渋谷区千駄ヶ谷四丁目６番15号株式会社フジタ内 (72)発明者梶原美知雄東京都渋谷区千駄ヶ谷四丁目６番15号株式会社フジタ内 (72)発明者小早川敏東京都渋谷区千駄ヶ谷四丁目６番15号株式会社フジタ内 (72)発明者石黒文矢東京都渋谷区千駄ヶ谷四丁目６番15号株式会社フジタ内 (72)発明者小口吉昭東京都渋谷区千駄ヶ谷四丁目６番15号株式会社フジタ内 (72)発明者石井俊光東京都渋谷区千駄ヶ谷四丁目６番15号株式会社フジタ内 (72)発明者緑川博司東京都渋谷区千駄ヶ谷四丁目６番15号株式会社フジタ内 (72)発明者石井篤東京都渋谷区千駄ヶ谷四丁目６番15号株式会社フジタ内 (72)発明者森川馨東京都渋谷区千駄ヶ谷四丁目６番15号株式会社フジタ内 (72)発明者磯村渉東京都渋谷区千駄ヶ谷四丁目６番15号株式会社フジタ内 (72)発明者熊野康子東京都渋谷区千駄ヶ谷四丁目６番15号株式会社フジタ内 ──────────────────────────────────────────────────続き Continuing on the front page (72) Inventor Jin Sasaki 4-6-115 Sendagaya, Shibuya-ku, Tokyo Inside Fujita Co., Ltd. (72) Takashi Arai 4-6-1-15 Sendagaya, Shibuya-ku, Tokyo Stock Company (72) Inventor Yasutaka Ooi 4-6-115 Sendagaya, Shibuya-ku, Tokyo Co., Ltd.Fujita Co., Ltd. (72) Inventor Kazuo Yamakawa 4-6-115 Sendagaya, Shibuya-ku, Tokyo Co., Ltd.Fujita Co., Ltd. 72) Inventor Tomio Sakamoto 4-6-115 Sendagaya, Shibuya-ku, Tokyo Inside Fujita Co., Ltd. (72) Inventor Osamu Ichikawa 4-6-115 Sendagaya, Shibuya-ku, Tokyo Fujita Co., Ltd. (72) Inventor Michio Kajiwara 4-6-1 Sendagaya, Shibuya-ku, Tokyo Inside Fujita Corporation (72) Inventor Satoshi Kobayakawa 4-6- Sendagaya, Shibuya-ku, Tokyo No. 15 Fujita Co., Ltd. (72) Inventor Fumiya Ishiguro 4-6-1 Sendagaya, Shibuya-ku, Tokyo Stock Company Fujita Co., Ltd. (72) Yoshiaki Koguchi 4-6-115 Sendagaya, Shibuya-ku, Tokyo Stock Company Inside Fujita Corporation (72) Inventor Toshimitsu Ishii 4-6-115 Sendagaya, Shibuya-ku, Tokyo Co., Ltd. Inside Fujita Corporation (72) Hiroshi Midorikawa 4-6-115 Sendagaya, Shibuya-ku, Tokyo Co., Ltd. (72) Inventor Atsushi Ishii 4-6-115 Sendagaya, Shibuya-ku, Tokyo Inside Fujita Co., Ltd. (72) Inventor Kaoru Morikawa 4-6-115 Sendagaya, Shibuya-ku, Tokyo Fujita Co., Ltd. (72) Invention Person Wataru Isomura 4-6-15 Sendagaya, Shibuya-ku, Tokyo Inside Fujita Co., Ltd. (72) Inventor Yasuko Kumano 4-6-115 Sendagaya, Shibuya-ku, Tokyo Fujita Co., Ltd.

Claims

[Claims]

1. A half PC member comprising a plate-like concrete portion and a plurality of concrete joining surface shear reinforcing members partially buried in the concrete portion, wherein the shear reinforcing member comprises: An upper chord member comprising a structural reinforcing bar and a diagonal member comprising a single structural reinforcing bar, wherein the upper chord member is formed to extend linearly, and the diagonal member extends in a longitudinal direction of the upper chord member. A number of upper sides fixed to the upper chord at equal intervals, a number of bases arranged so as to be located on a straight line extending parallel to the upper chord, and ends of these upper sides. A connecting portion for sequentially connecting the bottom portion and an end of the bottom portion, a plane including the diagonal material extends in a direction parallel to a thickness direction of the concrete portion, and the upper chord material is formed of the concrete. It extends parallel to the surface facing the thickness direction of the part The portion of the shear reinforcement member is embedded in the concrete section, half PC member, characterized in that the.

2. The half PC member according to claim 1, wherein the upper chord member and the diagonal member are arranged so as to be included in a single plane.

3. The half PC member according to claim 1, wherein the upper chord member and an upper side of the diagonal member are fixed in a direction orthogonal to a plane including the diagonal member.

4. The shear reinforcing member buried in the concrete part is a bottom part of the diagonal member and a part near a bottom part of the connection part. Half PC member.

5. A plurality of shear reinforcing members are arranged in a lattice pattern, and at each intersection, the lower surface of the upper chord member of one shear reinforcing member is arranged to contact the upper surface of the upper chord member of the other shear reinforcing member. The half PC member according to claim 1, wherein

6. A shear reinforcing member, wherein a number of shear reinforcing members parallel to one direction and a number of shear reinforcing members parallel to the other direction orthogonal to the one direction are arranged in a grid. A number of shear reinforcing members parallel to one direction and a number of shear reinforcing members parallel to the other direction are arranged such that the top and bottom of the chord material and the bottom side are arranged in reverse, and each of the intersections forming a lattice shape 2. The half PC member according to claim 1, wherein the concave portions formed by the upper side portion and the connecting portions on both sides thereof are arranged so as to face each other.

7. A half PC member comprising a plate-like concrete portion and a plurality of concrete joining surface shear reinforcing members partially embedded in the concrete portion, wherein the shear reinforcing member comprises: An upper member made of two steel sheets,
It has a diagonal member made of one structural reinforcing bar and a bottom member made of one structural reinforcing bar, and the upper member is formed to have a narrow width and extend linearly. A number of upper sides fixed at substantially equal centers in the longitudinal direction of the upper member at the center in the width direction of the upper member, and so as to be located on a straight line extending in parallel with the upper member. The bottom member is formed in a waveform from a plurality of arranged bottom portions and a connecting portion that sequentially connects the ends of the upper side portion and the ends of the base portion, and the bottom member extends in parallel with the upper member. A plane including the diagonal material is fixed to each of a number of bases, extends in a direction parallel to a thickness direction of the concrete portion, and the upper member is parallel to a surface facing the thickness direction of the concrete portion. A part of the shear reinforcing member is buried in the concrete portion so as to extend. A half-PC member.

8. The half PC member according to claim 1, wherein the diagonal member and the bottom member are disposed so as to be included in a single plane.

9. The half PC member according to claim 1, wherein the bottom member and a bottom side of the diagonal member are fixed in a direction orthogonal to a plane including the diagonal member.

10. A structural reinforcing bar is buried in a lattice shape near a bottom surface of the concrete portion, and a portion where the shear reinforcing member faces the structural reinforcing bar is fixed to the structural reinforcing bar. Item 10. The half PC member according to any one of Items 1 to 9.

11. A plate-like concrete portion, a plurality of structural reinforcing bars buried in a lattice shape near the bottom surface of the concrete portion, and a plurality of concrete joining surfaces partially buried in the concrete portion. A half PC member comprising a shear reinforcing member, wherein the shear reinforcing member is a shaped steel comprising an upper flange and a lower flange facing each other, and a web connecting between the upper flange and the lower flange. A half PC member, wherein a flange is fixed to a structural reinforcing bar, and the lower flange and a portion closer to the lower flange of the feb are embedded in the concrete portion.

12. A shear reinforcing means for concrete is provided on all or any of the upper flange, the lower flange, and the web, and the shear reinforcing means is formed by a plurality of openings formed by embossing or by burring. 12. The half-PC member according to claim 11, wherein the half-PC member is constituted by a plurality of protrusions formed or welded protrusions.

13. The half PC member according to claim 1, wherein the half PC member is erected at a required position of a building, and directly or via a spacer on an upper end of a shear reinforcing member exposed from an upper surface of the concrete portion. A method for constructing a floor slab, comprising arranging and fixing an upper reinforcing bar of a floor slab, and then forming a post-cast concrete on an upper surface of a half PC member so that the upper reinforcing bar is buried.

14. The half-PC member according to claim 1, wherein the half-PC member is erected at a predetermined wall position of the building so as to constitute one of the front and back surfaces of the wall. A wall body characterized by laying a normal formwork or a normal half-PC member so as to constitute the other side, forming a space portion for post-cast concrete, and then pouring post-cast concrete into the space portion. Construction method.

15. Before placing the post-cast concrete,
The method for constructing a floor slab according to claim 13, or the method for constructing a wall according to claim 14, wherein a plurality of recycle blocks obtained by reforming waste plastic into blocks are arranged on the surface of the half PC member. .

16. A shear reinforcing member for a concrete jointing surface, a part of which is embedded in a half PC member, wherein the shear reinforcing member comprises an upper chord member made of one structural reinforcing bar, The upper chord is formed to extend linearly, and the diagonal members are fixed to the upper chord at equal intervals in the longitudinal direction of the upper chord; , A plurality of bases arranged so as to be located on a straight line extending in parallel with the upper chord material, and a connecting portion for sequentially connecting the ends of the tops and the bases A shear reinforcing member for a concrete joint surface of a half PC member, wherein the shear reinforcing member is formed in a corrugated shape.

17. A shear reinforcing member for a concrete joint surface, a part of which is embedded in a half PC member, wherein the shear reinforcing member is an upper member made of a single steel plate;
It has a diagonal member made of one structural reinforcing bar and a bottom member made of one structural reinforcing bar, and the upper member is formed to have a narrow width and extend linearly. A number of upper sides fixed at substantially equal centers in the longitudinal direction of the upper member at the center in the width direction of the upper member, and so as to be located on a straight line extending in parallel with the upper member. A concrete jointing surface of a half PC member, characterized by being formed in a waveform from a plurality of arranged bottom portions and a connecting portion that sequentially connects the ends of the upper side portion and the ends of the bottom side portion. For shear reinforcement members.

18. An apparatus according to claim 1, wherein an angle between the bottom side and the connecting part and an angle between the upper side and the connecting part are the same, and the angle is 90 ° or more and 120 ° or less. 17. A shear reinforcing member for a joint surface of a half PC member according to claim 6 or a half PC member according to claim 16.