JP2011032738A - Truss composite floor slab - Google Patents

Truss composite floor slab Download PDF

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JP2011032738A
JP2011032738A JP2009180327A JP2009180327A JP2011032738A JP 2011032738 A JP2011032738 A JP 2011032738A JP 2009180327 A JP2009180327 A JP 2009180327A JP 2009180327 A JP2009180327 A JP 2009180327A JP 2011032738 A JP2011032738 A JP 2011032738A
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floor slab
truss
pca floor
pca
joint surface
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JP5264646B2 (en
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Tetsuya Kono
哲也 河野
Takashi Okayasu
隆史 岡安
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Kajima Corp
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Kajima Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a truss composite floor slab which is easy for handling during storage or transportation or the like, and is ready for assembling after being carried in the site. <P>SOLUTION: The truss composite floor slab includes a PCa floor slab 2 and a plurality of truss reinforcements 3 projected on the concrete construction joint surface 2a of the PCa floor slab 2. An embedding insert 4 is embedded in the concrete construction joint surface 2a of the PCa floor slab 2. The truss reinforcement 3 comprises an upper-end reinforcement 3a, a plurality of lower end reinforcements 3b, 3b and a plurality of lattice reinforcements 3c arranged between the upper-end reinforcement 3a and lower end reinforcements 3b, 3b, and formed into a three-dimensional truss form having substantially a triangle cross section. The lower end reinforcements 3b, 3b of the truss reinforcement 3 are attached to the concrete construction joint surface 2a of the PCa floor slab 2. The lower end reinforcements 3b, 3b of the truss reinforcement 3 are secured to the concrete construction joint surface 2a of the PCa floor slab 2 with a plurality of lower end reinforcement grasping tools 5 and fixing bolts 6. The fixing bolts 6 are screwed with the embedding inserts 4. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

本発明はトラス合成床版に関し、運搬や保管等に際して嵩張らず取り扱いが容易で、しかも現地搬入後に容易に組み立てることができる。   The present invention relates to a truss composite floor slab, which is not bulky during transportation and storage and is easy to handle, and can be easily assembled after being brought into the field.

主に建築土木工事で用いられるプレキャストコンクリート床版(以下「ＰＣａ床版」)として、ＰＣａ床版本体とそのコンクリートの打ち継ぎ面に突設された複数のトラス鉄筋とからなるハーフＰＣａ床版が一般に知られ、工期短縮、コストダウンおよび高品質化などに寄与するため広く利用されている。   As a precast concrete floor slab (hereinafter referred to as “PCa floor slab”) mainly used in construction and civil engineering work, a half PCa floor slab composed of a PCa floor slab body and a plurality of truss reinforcing bars projecting from the joint surface of the concrete is used. It is generally known and widely used to contribute to shortening the construction period, reducing costs and improving quality.

ハーフＰＣａ床版は、一般に鉄筋の加工工場でトラス鉄筋を製作し、それをＰＣａ床版成型工場に運搬し、そしてそこで成型されるＰＣａ床版と一体化することにより成型され、建設現場に搬入される。   Half PCa floor slabs are generally formed by manufacturing truss rebars at a rebar processing factory, transporting them to the PCa floor slab molding factory, and then integrating them with the PCa floor slabs that are molded there, and then carrying them to the construction site. Is done.

例えば、特許文献１には コンクリート板とそのコンクリートの打ち継ぎ面に突設されたトラス鉄筋とからなるハーフＰＣａ床版が開示されている。また、特許文献２と特許文献３には、既存床の上に複数のトラス鉄筋を設置し、当該トラス鉄筋を覆うように既存床の上にコンクリートを打設する既存床の補強構造について開示されている。   For example, Patent Document 1 discloses a half PCa floor slab composed of a concrete plate and a truss reinforcing bar projecting from a joint surface of the concrete. Patent Document 2 and Patent Document 3 disclose a reinforcement structure for an existing floor in which a plurality of truss reinforcing bars are installed on an existing floor and concrete is placed on the existing floor so as to cover the truss reinforcing bars. ing.

特開２００４−１６２２９３号公報JP 2004-162293 A 特開２００４−３２４２６２号公報JP 2004-324262 A 特開２００７−１８２７２６号公報JP 2007-182726 A

しかし、この種のハーフＰＣａ床版に用いられるトラス鉄筋は特殊な機械によって製作され、しかもこの種のトラス鉄筋を製作できる工場は日本国内でも非常に少ない。このため、運搬コスト等を考慮するとハーフＰＣａ床版の成型工場は、鉄筋加工工場の近隣に建設されることが多くなり、結果としてコストパフォーマンスが低下するという課題があった。   However, the truss reinforcing bars used for this kind of half PCa floor slab are manufactured by a special machine, and there are very few factories in Japan that can manufacture this kind of truss reinforcing bars. For this reason, in consideration of transportation costs and the like, the half-PCa floor slab molding factory is often built in the vicinity of the reinforcing bar processing factory, resulting in a problem that cost performance is lowered.

また、ＰＣａ床版本体のコンクリート打ち継ぎ面側にトラス鉄筋が突設されているため、積層して保管したり運搬したりする等の際に、嵩張り取り扱いが困難である等の課題があった。   In addition, since the truss reinforcing bar protrudes from the concrete joint surface side of the PCa floor slab body, there are problems such as difficulty in bulk handling when stacked and stored or transported. It was.

本発明は、以上の課題を解決するためになされたもので、保管や運搬等の取り扱いが容易で、しかも現地搬入後に容易に組み立てることのできるトラス合成床版を提供することを目的とする。   The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a truss composite floor slab that is easy to handle such as storage and transportation and can be easily assembled after being brought into the field.

請求項１記載のトラス合成床版は、ＰＣａ床版と、当該ＰＣａ床版のコンクリート打ち継ぎ面に突設された複数のトラス鉄筋とからなるトラス合成床版において、ＰＣａ床版のコンクリート打ち継ぎ面に埋設された埋込インサートと、トラス鉄筋の下端筋を把持する複数の下端筋把持具と、当該下端筋把持具をＰＣａ床版のコンクリート打ち継ぎ面に固定する複数の固定ボルトとを備え、前記固定ボルトは前記埋込インサートに螺合されてなることを特徴とするものである。   The truss composite floor slab according to claim 1 is a truss composite floor slab comprising a PCa floor slab and a plurality of truss reinforcing bars projecting from the concrete joint surface of the PCa floor slab. An embedded insert embedded in the surface, a plurality of lower end bar gripping tools for gripping the lower end bar of the truss reinforcing bar, and a plurality of fixing bolts for fixing the lower end bar gripping tool to the concrete joining surface of the PCa floor slab The fixing bolt is screwed into the embedded insert.

本発明は、ＰＣａ床版とトラス鉄筋を別々に製作し、これらを現地搬入後に一体に組み立てられるようにしたことで、運搬や保管等の取り扱いを容易に行えるようにしたものである。   In the present invention, the PCa floor slab and the truss rebar are separately manufactured, and these can be assembled together after being brought into the field so that handling such as transportation and storage can be easily performed.

本発明によれば、ＰＣａ床版とトラス鉄筋は、トラス鉄筋の下端筋をＰＣａ床版のコンクリート打ち継ぎ面に複数の下端筋把持具とＰＣａ床版の打ち継ぎ面に埋設された埋込インサートに螺合される固定ボルトで固定することにより(乾式接合)一体に結合することできることで、現地搬入後容易に組み立てることができる。   According to the present invention, the PCa floor slab and the truss reinforcing bar are embedded inserts in which the bottom reinforcing bar of the truss reinforcing bar is embedded in the concrete connecting surface of the PCa floor slab and the plurality of lower end reinforcing bars and the connecting surface of the PCa floor slab. By being fixed with a fixing bolt that is screwed to (dry bonding), it is possible to assemble them together after being brought into the field.

なお、下端筋把持具またはＰＣａ床版のコンクリート打ち継ぎ面に下端筋を設置するための凹部を設けることにより、ＰＣａ床版とトラス鉄筋とを確実強固に結合することができる。   In addition, the PCa floor slab and the truss reinforcing bar can be securely bonded by providing a recess for installing the lower end reinforcing bar on the concrete joint surface of the lower end reinforcing bar gripper or the PCa floor slab.

請求項２記載のトラス合成床版は、請求項１記載のトラス合成床版において、ＰＣａ床版のコンクリート打ち継ぎ面に設けられた凹部内にトラス鉄筋の下端筋が設置されてなることを特徴とするものである。   The truss composite floor slab according to claim 2 is characterized in that, in the truss composite floor slab according to claim 1, the bottom bar of the truss reinforcing bar is installed in a recess provided in the concrete joint surface of the PCa floor slab. It is what.

トラス鉄筋の下端筋をＰＣａ床版のコンクリート打ち継ぎ面に形成した凹部内に設置して固定することで、トラス鉄筋をＰＣａ床版に確実強固に固定することができ、また下端筋把持具は固定ボルトを通すボルト孔のみを有するプレートでよく、下端筋把持具の製作が容易になる。   By installing and fixing the lower bar of the truss reinforcing bar in the recess formed on the concrete joint surface of the PCa floor slab, the truss reinforcing bar can be securely fixed firmly to the PCa floor slab. A plate having only a bolt hole through which the fixing bolt is passed may be used, which facilitates manufacture of the lower end muscle gripping tool.

請求項３記載のトラス合成床版は、ＰＣａ床版とＰＣａ床版のコンクリート打ち継ぎ面に突設されたトラス鉄筋とからなるトラス合成床版において、前記ＰＣａ床版のコンクリート打ち継ぎ面に設けられた凹部にトラス鉄筋の下端筋が設置され、かつ凹部内に固結材が充填されてなることを特徴とするものである。   The truss composite floor slab according to claim 3 is a truss composite floor slab composed of a PCa floor slab and a truss reinforcing bar protruding from the concrete joint surface of the PCa floor slab, provided on the concrete joint surface of the PCa floor slab. The lower end of the truss reinforcing bar is installed in the formed recess, and the recess is filled with a caking material.

本発明は、上記するような金具や固定ボルトを使用しないでＰＣａ床版とトラス鉄筋とを一体的に結合できるようにしたもので、この場合の固結材にはエポキシ樹脂などを利用することができる。   In the present invention, the PCa floor slab and the truss reinforcing bar can be integrally coupled without using the metal fittings and fixing bolts as described above. In this case, an epoxy resin or the like is used as the binding material. Can do.

請求項４記載のトラス合成床版は、請求項３記載のトラス合成床版において、凹部はテーパ付き凹部であることを特徴とするものである。本発明は、下端筋を設置する凹部をテーパ付き凹部、いわゆる蟻溝とすることにより引抜きに対する抵抗力を増大させたものである。   A truss composite floor slab according to claim 4 is the truss composite floor slab according to claim 3, wherein the recess is a tapered recess. In the present invention, the resistance to pulling is increased by making the recess where the lower end streak is installed into a tapered recess, a so-called dovetail.

本発明によれば、ＰＣａ床版とトラス鉄筋が別々に形成され、かつ現地搬入後、一体に組み立てられるように構成されていることで、取り扱いがきわめて容易である等の効果がある。   According to the present invention, the PCa floor slab and the truss reinforcing bar are formed separately, and are configured to be assembled together after being brought into the field, so that there are effects such as extremely easy handling.

また、トラス鉄筋は、下端筋を把持する下端筋把持具とＰＣａ床版の打ち継ぎ面に埋設された埋込みインサートに螺合される固定ボルトによってＰＣａ版と一体化されているので、容易に組み立てることができる。   Also, the truss reinforcing bar is integrated with the PCa plate easily by the lower end bar gripping tool for holding the lower bar and the fixing bolt screwed to the embedded insert embedded in the joint surface of the PCa floor slab. be able to.

トラス合成床版の一実施形態を示し、(ａ)は長軸方向の縦断面図、(ｂ)は図(ａ)におけるＡ−Ａ線断面図、(ｃ)は図(ｂ)における一部拡大図である。1 shows an embodiment of a truss composite floor slab, (a) is a longitudinal sectional view in the major axis direction, (b) is a sectional view taken along line AA in FIG. (A), and (c) is a part of FIG. It is an enlarged view. トラス合成床版の他の実施形態を示し、(ａ)は長軸方向の縦断面図、(ｂ)は図(ａ)におけるＡ−Ａ線断面図、図(ｃ)は図(ｂ)における一部拡大図である。The other embodiment of a truss composite floor slab is shown, (a) is a longitudinal cross-sectional view in the major axis direction, (b) is a cross-sectional view taken along line AA in FIG. (A), and FIG. (C) is in FIG. FIG. (ａ)，(ｂ)は、本発明の他の実施形態を示す図１(ａ)におけるＡ−Ａ線一部断面図である。(a), (b) is the AA partial sectional view in FIG. 1 (a) which shows other embodiment of this invention.

図１(ａ)〜(ｃ)は、本発明の一実施形態を示し、図においてトラス合成床版１は、ＰＣａ床版２と複数のトラス鉄筋３とから構成されている。ＰＣａ床版２は矩形版状に形成され、そのコンクリート打ち継ぎ面２ａに複数の埋込インサート４が埋設されている。   FIGS. 1A to 1C show an embodiment of the present invention. In the figure, a truss composite floor slab 1 is composed of a PCa floor slab 2 and a plurality of truss reinforcing bars 3. The PCa floor slab 2 is formed in a rectangular plate shape, and a plurality of embedded inserts 4 are embedded in the concrete joining surface 2a.

埋込インサート４は、後述するトラス鉄筋３の各下端筋３ｂの両側の、下端筋３ｂの中間部分と両端部分の少なくとも三箇所に埋設されている。   The embedded inserts 4 are embedded in at least three locations on both sides of each of the lower end bars 3b of the truss reinforcing bar 3 to be described later, an intermediate portion and both end portions of the lower end bars 3b.

トラス鉄筋３は、ＰＣａ床版２の長軸方向に連続し、かつＰＣａ床版２の長軸直角方向に所定間隔をおいて複数配置されている。   A plurality of truss rebars 3 are arranged in the major axis direction of the PCa floor slab 2 and at predetermined intervals in the direction perpendicular to the major axis of the PCa floor slab 2.

また、トラス鉄筋３は上端筋３ａと複数の下端筋３ｂ，３ｂと上端筋３ａと下端筋３ｂ，３ｂとの間にそれぞれ配筋された複数のラチス筋３ｃとから断面ほぼ三角形の立体トラス状に形成されている。   The truss reinforcing bar 3 is a three-dimensional truss having a substantially triangular cross section from an upper end 3a, a plurality of lower ends 3b, 3b, an upper end 3a, and a plurality of lattices 3c arranged between the lower ends 3b, 3b. Is formed.

下端筋３ｂ，３ｂはＰＣａ床版２のコンクリート打ち継ぎ面２ａに添え付けられ、かつ複数の下端筋把持具５と固定ボルト６によってＰＣａ床版２のコンクリート打ち継ぎ面２ａに固定されている。   The lower end bars 3b, 3b are attached to the concrete joining surface 2a of the PCa floor slab 2, and are fixed to the concrete joining surface 2a of the PCa floor slab 2 by a plurality of lower end bar gripping tools 5 and fixing bolts 6.

下端筋把持具５は、トラス鉄筋３の長軸直角方向に長い矩形板状に形成され、下端面にトラス鉄筋３の下端筋３ｂ，３ｂをそれぞれ収容する溝状の凹部５ａ，５ａが形成され、さらに凹部５ａ，５ａ間と両端部にボルト孔５ｂがそれぞれ形成されている。   The bottom bar gripping tool 5 is formed in a rectangular plate shape that is long in the direction perpendicular to the long axis of the truss reinforcing bar 3, and groove-shaped recesses 5a and 5a that respectively accommodate the bottom bar 3b and 3b of the truss reinforcing bar 3 are formed on the bottom surface. Further, bolt holes 5b are formed between the recesses 5a and 5a and at both ends.

そして、下端筋把持具５は、下端筋３ｂ，３ｂの上からＰＣａ床版２のコンクリート打ち継ぎ面２ａの上に添え付けられ、凹部５ａ，５ａ内に下端筋３ｂ，３ｂがそれぞれ設置され、かつ各ボルト孔５ｂから埋込インサート４内に固定ボルト６が締め付けられている。   And the lower end muscle gripping tool 5 is attached to the concrete joint surface 2a of the PCa floor slab 2 from above the lower end muscles 3b, 3b, and the lower end muscles 3b, 3b are installed in the recesses 5a, 5a, respectively. And the fixing bolt 6 is fastened in the embedded insert 4 from each bolt hole 5b.

こうして、ＰＣａ床版２とトラス鉄筋３が一体に結合されていることにより、トラス合成床版１、すなわちハーフＰＣａ床版が構成されている。   In this way, the PCa floor slab 2 and the truss reinforcing bar 3 are integrally coupled to each other to constitute the truss composite floor slab 1, that is, the half PCa floor slab.

なお、図２(ａ)〜(ｃ)に図示するように、下端筋把持具５の凹部５ａ，５ａを無くし、ＰＣａ床版２のコンクリート打ち継ぎ面２ａに下端筋３ｂ，３ｂを収容するための凹部２ｂ，２ｂを形成してもよい。   2 (a) to 2 (c), the recesses 5a and 5a of the lower end bar gripping tool 5 are eliminated, and the lower end bars 3b and 3b are accommodated in the concrete joining surface 2a of the PCa floor slab 2. The recesses 2b and 2b may be formed.

この実施形態によれば、トラス鉄筋３をＰＣａ床版２のコンクリート打ち継ぎ面２ａに確実強固に固定することができ、また下端筋把持具５は固定ボルト６を通すボルト孔５ｂのみを有するプレートでよく、下端筋把持具５を容易に製作することができる。   According to this embodiment, the truss reinforcing bar 3 can be securely and firmly fixed to the concrete joining surface 2a of the PCa floor slab 2, and the lower end bar gripping tool 5 is a plate having only a bolt hole 5b through which the fixing bolt 6 is passed. The lower end muscle gripper 5 can be easily manufactured.

図３(ａ)，(ｂ)は、本発明の他の実施形態を示し、ＰＣａ床版２のコンクリート打ち継ぎ面２ａに複数の凹部２ｃ，２ｃがＰＣａ床版２の長軸方向に連続して形成されている。   3 (a) and 3 (b) show another embodiment of the present invention, in which a plurality of recesses 2c, 2c are continuously formed in the long axis direction of the PCa floor slab 2 on the concrete joining surface 2a of the PCa floor slab 2. Is formed.

そして、トラス鉄筋３の下端筋３ｂ，３ｂが凹部２ｂ，２ｂ内にそれぞれ設置され、かつその後から凹部２ｂ内にエポキシ樹脂７が充填されている。また、図４においてはさらに、凹部２ｂとしてテーパ付き凹部、いわゆる蟻溝が形成されている。このようにしてＰＣａ床版２とトラス鉄筋３が一体化されることによりトラス合成床版１、すなわちハーフＰＣａ床版が構成されている。   And the lower end bars 3b and 3b of the truss reinforcing bar 3 are installed in the recesses 2b and 2b, respectively, and thereafter, the epoxy resin 7 is filled in the recess 2b. Further, in FIG. 4, a tapered recess, so-called dovetail, is formed as the recess 2b. In this way, the PCa floor slab 2 and the truss reinforcing bar 3 are integrated to form a truss composite floor slab 1, that is, a half PCa floor slab.

本発明は、ＰＣａ床版とトラス鉄筋を別々に製作し、現地で一体に組み立てることにより運搬や保管等の取り扱いの容易なトラス合成床版を提供することができる。   The present invention can provide a truss composite floor slab that is easy to handle such as transportation and storage by separately producing a PCa floor slab and a truss rebar and assembling them integrally on site.

１ トラス合成床版
２ ＰＣａ床版
２ａ コンクリートの打ち継ぎ面
２ｂ 凹部
２ｃ 凹部
３ トラス鉄筋
３ａ 上端筋
３ｂ 下端筋
３ｃ ラチス筋
４ 埋込インサート
５ 下端筋把持具
６ 固定ボルト
７ 固結材 DESCRIPTION OF SYMBOLS 1 Truss composite floor slab 2 PCa floor slab 2a Concrete joint surface 2b Recessed part 2c Recessed part 3 Truss reinforcing bar 3a Upper end reinforcement 3b Lower end reinforcement 3c Lattice reinforcement 4 Embedded insert 5 Lower end reinforcement gripping tool 6 Fixing bolt 7 Solidified material

Claims (4)

ＰＣａ床版と、当該ＰＣａ床版のコンクリート打ち継ぎ面に突設された複数のトラス鉄筋とからなるトラス合成床版において、ＰＣａ床版のコンクリート打ち継ぎ面に埋設された埋込インサートと、トラス鉄筋の下端筋を把持する複数の下端筋把持具と、当該下端筋把持具をＰＣａ床版のコンクリート打ち継ぎ面に固定する複数の固定ボルトとを備え、前記固定ボルトは前記埋込インサートに螺合されてなることを特徴とするトラス合成床版。   A truss composite floor slab comprising a PCa floor slab and a plurality of truss reinforcing bars projecting from a concrete joint surface of the PCa floor slab, an embedded insert embedded in the concrete joint surface of the PCa floor slab, and a truss And a plurality of fixing bolts for fixing the lower end muscle gripping tool to the concrete joining surface of the PCa floor slab. The fixing bolts are screwed onto the embedded insert. Truss composite floor slab characterized by being combined. ＰＣａ床版のコンクリート打ち継ぎ面に設けられた凹部内にトラス鉄筋の下端筋が設置されてなることを特徴とする請求項１記載のトラス合成床版。   2. The truss composite floor slab according to claim 1, wherein a bottom bar of the truss reinforcing bar is installed in a recess provided in the concrete joint surface of the PCa floor slab. ＰＣａ床版とＰＣａ床版のコンクリート打ち継ぎ面に突設されたトラス鉄筋とからなるトラス合成床版において、前記ＰＣａ床版のコンクリート打ち継ぎ面に設けられた凹部にトラス鉄筋の下端筋が設置され、かつ固結材によって固定されてなることを特徴とするトラス合成床版。   In the truss composite floor slab composed of the PCa floor slab and the truss reinforcing bar projecting on the concrete joint surface of the PCa floor slab, the lower bar of the truss reinforcing bar is installed in the recess provided in the concrete joint surface of the PCa floor slab. And a truss composite floor slab characterized by being fixed by a caking material. 凹部はテーパ付き凹部であることを特徴とする請求項３記載のトラス合成床版。
4. The truss composite floor slab according to claim 3, wherein the recess is a tapered recess.
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Cited By (4)

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Publication number Priority date Publication date Assignee Title
KR101839520B1 (en) * 2015-12-08 2018-03-16 이진희 Reinforced Steel Half Slab
KR102048577B1 (en) * 2019-03-18 2019-11-25 정현석 Insulation Integrated Deck Plate
KR102113729B1 (en) * 2019-11-01 2020-05-20 주식회사 도화기술 Composite built-up beam
CN114922330A (en) * 2022-06-14 2022-08-19 四川省建筑设计研究院有限公司 Heat preservation sound insulation structure integration assembled coincide floor

Families Citing this family (1)

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Publication number Priority date Publication date Assignee Title
CN104131709B (en) * 2014-07-09 2016-01-20 中国十七冶集团有限公司 The detachable rigidity aggrandizement apparatus of superimposed sheet

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JP2004162293A (en) * 2002-11-11 2004-06-10 Nippon Kaiser Kk Precast concrete floor slab for viaduct, and laying method therefor

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JP2004162293A (en) * 2002-11-11 2004-06-10 Nippon Kaiser Kk Precast concrete floor slab for viaduct, and laying method therefor

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101839520B1 (en) * 2015-12-08 2018-03-16 이진희 Reinforced Steel Half Slab
KR102048577B1 (en) * 2019-03-18 2019-11-25 정현석 Insulation Integrated Deck Plate
KR102113729B1 (en) * 2019-11-01 2020-05-20 주식회사 도화기술 Composite built-up beam
CN114922330A (en) * 2022-06-14 2022-08-19 四川省建筑设计研究院有限公司 Heat preservation sound insulation structure integration assembled coincide floor
CN114922330B (en) * 2022-06-14 2023-01-24 四川省建筑设计研究院有限公司 Heat preservation sound insulation structure integration assembled coincide floor

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