JP2890132B2 - Manufacturing method of precast concrete slab - Google Patents
Manufacturing method of precast concrete slabInfo
- Publication number
- JP2890132B2 JP2890132B2 JP7549090A JP7549090A JP2890132B2 JP 2890132 B2 JP2890132 B2 JP 2890132B2 JP 7549090 A JP7549090 A JP 7549090A JP 7549090 A JP7549090 A JP 7549090A JP 2890132 B2 JP2890132 B2 JP 2890132B2
- Authority
- JP
- Japan
- Prior art keywords
- reticulated
- rib
- formwork
- ribs
- shaped
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Landscapes
- Rod-Shaped Construction Members (AREA)
- Moulds, Cores, Or Mandrels (AREA)
- Manufacturing Of Tubular Articles Or Embedded Moulded Articles (AREA)
Description
【発明の詳細な説明】 （産業上の利用分野） 本発明は、プレキャストコンクリート（以下、PCと略
す。）版の製造方法に係わるものである。DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a method for producing a precast concrete (hereinafter abbreviated as PC) plate.
（従来の技術） 従来のPC版による合成梁は、本発明者等により既に特
願平１−223266号（特開平３−87451号）において、
「肋筋を縦に２分割してなる分割肋筋、及び梁下端主筋
を垂直部片に埋設するとともに、前記分割肋筋の両端部
を垂直部片の上端面及び下部内側面より突出せしめ、前
記梁下端主筋の両端部を垂直部片の長手方向両端面より
突出せしめてなる左右一対のＬ型PC版を、夫々の水平部
片の端面が対向するように向い合わせに組立てたPC合成
梁」を提案した。(Prior Art) A composite beam using a conventional PC plate has already been disclosed by the present inventors in Japanese Patent Application No. 1-223266 (Japanese Patent Application Laid-Open No. 3-87451).
"Embedded in the vertical piece the split ribs, which are obtained by dividing the ribs vertically into two, and the main bar at the lower end of the beam, and make both ends of the split ribs protrude from the upper end face and the lower inner surface of the vertical piece, A PC composite beam in which a pair of left and right L-shaped PC plates, in which both ends of the main bar at the lower end of the beam protrude from both ends in the longitudinal direction of the vertical piece, face each other so that the end faces of the horizontal pieces face each other. "Suggested.
そして、Ｌ型PC版の製造にあたっては、Ｌ型PC版製造
用の型枠を組立て、型枠内に所要の配筋を施し、コンク
リートを打設した後、脱型を行って、Ｌ型PC版を個々に
製造し、同版を組合わせてPC合成梁を組立てていた。Then, when manufacturing the L-shaped PC plate, assemble the formwork for manufacturing the L-shaped PC plate, apply the required reinforcement in the formwork, cast concrete, remove the mold, Plates were manufactured individually, and the plates were combined to assemble PC composite beams.
（発明が解決しようとする課題） しかしながら、前記の方法によれば、Ｌ型PC版を個々
に製造するため広いスペースが必要となり、手間と時間
を要し、また前記分割肋筋は一本につき４箇所の折曲げ
点があり、多数本だと多大の労力を要し、折曲げ位置の
ずれを生じる可能性があった。(Problems to be Solved by the Invention) However, according to the above-described method, a large space is required for individually manufacturing the L-shaped PC plates, which requires time and effort, and the split ribs are required for each piece. There are four bending points. If there are many bending points, a great deal of labor is required, and there is a possibility that the bending position may shift.
（発明の目的） 本発明は、前記従来技術の有する課題を解決するため
に提案されたもので、肋筋及びＬ型PC版の製作が容易
で、品質精度がよく、工期の短縮及び作業の省力化が可
能な、PC版の製造方法を提供することにある。(Purpose of the Invention) The present invention has been proposed to solve the problems of the prior art, and is easy to manufacture ribs and L-shaped PC plates, has high quality accuracy, shortens the construction period, and reduces the work time. It is an object of the present invention to provide a method of manufacturing a PC plate that can save labor.
（課題を解決するための手段） 前記目的を達成するため、本発明に係わるPC版の製造
方法は、鉄筋網を折曲げて、Ｃ型肋筋と腹筋と梁下端主
筋とからなる網状肋筋を成形し、方形型枠内に４組の網
状肋筋を、同各網状肋筋の各梁下端主筋が前記方形型枠
の各隅角部と相対するようにして、卍状に配設すると共
に、前記方形型枠と各網状肋筋との間にコンクリート被
り代分の間隙を設け、前記各網状肋筋の梁下端主筋と相
対してコーナー型枠を配設すると共に、同コーナー型枠
と各網状肋筋との間にコンクリート被り代分の間隙を設
け、前記各網状肋筋を挟み、方形型枠とコーナー型枠と
を止め金具により固定し、相隣る網状肋筋の境に縁切材
を配設し、前記方形型枠内にコンクリートを投入して遠
心成形法により、Ｌ型PC版を成型するように構成してあ
る。(Means for Solving the Problems) In order to achieve the above object, a method for manufacturing a PC plate according to the present invention is characterized in that a reinforcing steel mesh is bent to form a reticulated rib comprising a C-shaped rib, abdominal muscle, and a main bar at the lower end of a beam. Is formed, and four sets of reticulated ribs are arranged in a rectangular formwork in a swastika shape such that the main bar at the lower end of each beam of each reticulated rib faces each corner of the rectangular formwork. At the same time, a gap is provided between the square formwork and each reticulated rib for a concrete covering allowance, and a corner formwork is disposed opposite to the beam bottom main reinforcement of each of the reticulated ribs. A gap corresponding to the concrete allowance is provided between each mesh rib and each mesh rib, and the mesh ribs are sandwiched, and the rectangular formwork and the corner formwork are fixed with fasteners. Arrange the edge cutting material, put concrete in the rectangular form, and mold L-shaped PC plate by centrifugal molding method. It is form.
（作用） 本発明によれば前記したように、鉄筋網を折曲げて、
Ｃ型肋筋と腹筋と梁下端主筋とからなる網状肋筋を成形
し、方形型枠内に４組の網状肋筋を、同各網状肋筋の各
梁下端主筋が前記方形型枠の各隅角部と相対するように
して、卍状に配設すると共に、前記方形型枠と各網状肋
筋との間にコンクリート被り代分の間隙を設け、前記各
網状肋筋の梁下端主筋と相対してコーナー型枠を配設す
ると共に、同コーナー型枠と各網状肋筋との間にコンク
リート被り代分の間隙を設け、前記各網状肋筋を挟み、
方形型枠とコーナー型枠とを止め金具により固定し、相
隣る網状肋筋の境に縁切材を配設し、前記方形型枠内に
コンクリートを投入して遠心成形法により、Ｌ型PC版を
成型することによって、 ＜イ＞肋筋を１本ずつ折曲げて組立てる場合と比べ、作
業の大幅な省力化及び配設精度の向上が図れる。(Operation) According to the present invention, as described above, the reinforcing steel net is bent,
A reticulated rib composed of a C-shaped rib, abdominal muscle, and a beam bottom main bar is formed, and four sets of reticulated ribs are placed in a square frame. In opposite to the corners, arranged in a swastika shape, a gap corresponding to the concrete covering allowance is provided between the rectangular form and each reticulated rib, and a beam lower main reinforcement of each of the reticulated ribs. Along with arranging the corner formwork facing each other, a gap corresponding to the concrete covering allowance is provided between the corner formwork and each reticulated rib, sandwiching each of the reticulated ribs,
The square formwork and the corner formwork are fixed with fasteners, the edge cutting material is arranged at the border of the adjacent reticulated ribs, concrete is put into the square formwork, and the L-form is formed by centrifugal molding. By molding the PC plate, <a> Compared with the case where the ribs are bent one by one, the labor can be saved significantly and the arrangement accuracy can be improved.
＜ロ＞精度のよいPC版を短時間に多量に成型できるの
で、生産性が向上する。<B> Since high-precision PC plates can be molded in large quantities in a short time, productivity is improved.
＜ハ＞密実で高強度のＬ型PC版が成型できるので、梁構
築時の大きな負荷がかかるPC梁型枠兼構造材として用い
るのに最適である。<C> Since a solid and high-strength L-shaped PC plate can be molded, it is most suitable for use as a PC beam formwork and structural material that places a large load on beam construction.
＜ニ＞Ｌ型PC版に網状肋筋の一部が埋設されるので一体
性が確保でき、同肋筋の折曲げ部がＬ型PC版の垂直部片
の上端部から、同肋筋のフック部が水平部片の内側面か
ら夫々突設しているので、後付けする梁主筋の係止が確
実且つ容易となる。<D> Since a part of the reticulated ribs is buried in the L-shaped PC plate, integrity can be secured, and the bent portion of the ribs is cut from the upper end of the vertical piece of the L-shaped PC plate. Since the hooks protrude from the inner surfaces of the horizontal pieces, respectively, the locking of the beam main reinforcing bars to be retrofitted is ensured and easy.
（実施例） 以下、本発明のPC版の製造方法を図示の実施例につい
て説明する。(Examples) Hereinafter, a method for manufacturing a PC plate of the present invention will be described with reference to the illustrated examples.
＜イ＞網状肋筋１（第６図，第７図） 鉄筋網15は、所要の間隔をおいた多数本の縦筋１′
と、これらと直交する複数本の横筋３とからなり、所要
の交差部は溶接などにより固接してある。鉄筋網15に
は、梁下端主筋２が横筋３と並行して配設され、縦筋
１′と固接してある。（第６図） 網状肋筋１は、鉄筋網15の各縦筋１′をＣ型に折曲げ
た多数本のＣ型肋筋11と横筋（腹筋）３及び梁下端主筋
２とからなる。（第７図） 網状肋筋１の製作は、第６図の破線に示すように、鉄
筋網15の縦筋１′の所定部位、例えば梁下端主筋２の位
置で矢印方向に折曲げ、更に、先端部をフック状に折曲
げて、左右略対称のＣ型に成形する。図中13,14は、夫
々Ｃ型肋筋11の折曲げ部及びフック部である。<B> Reticulated rib 1 (FIGS. 6 and 7) The reinforcing bar 15 is composed of a number of longitudinal bars 1 'spaced at required intervals.
And a plurality of horizontal streaks 3 orthogonal to these, and required intersections are firmly connected by welding or the like. The main reinforcing bar 2 at the lower end of the beam is disposed in the reinforcing bar network 15 in parallel with the horizontal bar 3, and is firmly connected to the vertical bar 1 '. (FIG. 6) The reticulated rib 1 is composed of a large number of C-shaped ribs 11 in which each longitudinal bar 1 ′ of the reinforcing bar network 15 is bent into a C-shape, a horizontal bar (abdominal muscle) 3, and a main bar 2 at the lower end of the beam. (FIG. 7) As shown by the broken line in FIG. 6, the reticulated rib 1 is manufactured by bending in a direction indicated by an arrow at a predetermined portion of the longitudinal bar 1 ′ of the reinforcing bar network 15, for example, at the position of the main bar 2 at the bottom of the beam. Then, the tip is bent into a hook shape to form a C-shape that is substantially symmetrical in the left-right direction. In the figure, reference numerals 13 and 14 are a bent portion and a hook portion of the C-shaped rib 11, respectively.
尚、梁下端主筋２は、網状肋筋１の成形後に、同肋筋
１の角部に取付けて各Ｃ型肋筋11に固接してもよい。Note that the beam bottom main bar 2 may be attached to a corner of the rib bar 1 after the reticulated bar 1 is formed, and may be firmly attached to each C-shaped bar 11.
上記のようになるので、肋筋を１本ずつ折曲げて組立
てる場合と比べ、作業の省力化及び配筋精度の向上が図
れる。As described above, labor saving and improvement in arrangement accuracy can be achieved as compared with the case where the ribs are bent one by one and assembled.
＜ロ＞型枠内への網状肋筋１の据付け（第１図） 型枠は、円筒の遠心成形型枠４とそれに内接する方形
の型枠５からなり、両型枠共に組立て及び解体が容易な
機構になっている。<B> Installation of Reticulated Rib 1 in Form (Fig. 1) The form is composed of a cylindrical centrifugal form 4 and a rectangular form 5 inscribed in it. Both forms are assembled and dismantled. It is an easy mechanism.
方形型枠５内に４組の網状肋筋１を据付ける。即ち、
各網状肋筋１は、同肋筋１の梁下端主筋２が方形型枠５
の隅角部と対応する位置に卍状に配設する。更に、コー
ナー型枠６を、各網状肋筋１の梁主筋２に臨む位置に配
設し、網状肋筋１を挟んで、方形型枠５とコーナー型枠
６を止め金具７により固定する。Four sets of reticulated ribs 1 are installed in a rectangular formwork 5. That is,
Each of the reticulated ribs 1 is composed of a square frame 5
It is arranged in a swastika shape at the position corresponding to the corner of. Further, the corner form 6 is disposed at a position facing the beam main reinforcement 2 of each reticulated rib 1, and the rectangular form 5 and the corner form 6 are fixed with the stopper 7 with the reticulated rib 1 interposed therebetween.
各網状肋筋１の据付けに際し、方形型枠５と網状肋筋
１との間にコンクリート被り代分の隙間16を、網状肋筋
１とコーナー型枠６との間にコンクリート被り代分の隙
間17を夫々明けておく。At the time of installation of each reticulated rib 1, a gap 16 for the concrete covering between the square form 5 and the reticulated rib 1, and a gap for the concrete covering between the reticulated rib 1 and the corner form 6 are provided. I will leave 17 each.
また、相隣る網状肋筋1,1の境界に帯板状の縁切材９
が配設してある。縁切材9,9′には、木片、プラスチッ
ク板、発泡スチロールなどを用いる。In addition, a strip-shaped edge cutting material 9 is provided at the boundary between the adjacent reticulated ribs 1,1.
Is arranged. Wood pieces, plastic plates, styrofoam, and the like are used for the edge cutting materials 9, 9 '.
上記のようになるので、狭いスペースで作業を迅速に
行うことができ、また多大の手間や時間を要すことがな
く高能率である。As described above, the work can be performed quickly in a small space, and the efficiency is high without requiring much labor and time.
＜ハ＞Ｌ型PC版10,20（第８図，第９図、及び第２図，
第３図） 前記したように、網状肋筋１を方形型枠５に据付けた
後、方形型枠５に外接する遠心成形型枠４を回転しなが
ら、方形型枠５内にコンクリートを徐々に投入してゆく
と、遠心力によってコンクリートは方形型枠５の側面か
ら内方に向かって厚さを増し締固められ、所要の厚さに
達したら成形型枠４の回転を止める。そしてコンクリー
トが硬化したのち脱型することにより、第２図及び第３
図に示す枠状のコンクリート体８が形成される。<C> L-type PC plates 10, 20 (FIGS. 8, 9, and 2,
(FIG. 3) As described above, after installing the reticulated ribs 1 on the rectangular form 5, while rotating the centrifugal forming form 4 circumscribing the rectangular form 5, gradually put the concrete into the rectangular form 5. As the concrete is poured, the concrete increases in thickness from the side of the rectangular form 5 toward the inside by the centrifugal force and is compacted. When the required thickness is reached, the rotation of the form 4 is stopped. After the concrete has hardened, it is released from the mold.
A frame-shaped concrete body 8 shown in the figure is formed.
第２図に示すコンクリート体８は、相隣る網状肋筋1,
1の境界、即ちＬ型PC版10,10の間に帯鋼板の縁切材９が
介装してあり、第３図のコンクリート体８には、Ｌ型PC
版20,20の間に発泡スチロールの縁切材19を介装した場
合である。The concrete body 8 shown in FIG.
An edge cutting member 9 of a strip steel plate is interposed between the boundaries of 1, that is, the L-shaped PC plates 10 and 10, and the concrete body 8 shown in FIG.
This is a case where a styrofoam cutting member 19 is interposed between the plates 20 and 20.
このように縁切材9,9′を介装したことで、上記コン
クリート体８を縁切材9,9′の位置で容易に分離でき、
一度で４台のＬ型PC版10,20を成型することができる。By interposing the edge cutting members 9, 9 'in this manner, the concrete body 8 can be easily separated at the positions of the edge cutting members 9, 9',
Four L-shaped PC plates 10, 20 can be molded at one time.
第８図及び第９図は、夫々第２図及び第３図に示す枠
状のコンクリート体８から分離したＬ型PC版10,20の縦
断面拡大図である。8 and 9 are enlarged longitudinal sectional views of the L-shaped PC plates 10 and 20 separated from the frame-shaped concrete body 8 shown in FIGS. 2 and 3, respectively.
第９図に示すＬ型PC版20は、縁切材９′を発泡スチロ
ールとしたので、PC版20の垂直部片18の上端面のレベル
が、第８図のＬ型PC版10のそれよりも低くなる。このＬ
型PC版20を２台梁用いて梁型枠を構成し、同型枠上部の
床版（図示省略）及び梁型枠内にコンクリートを打設す
ることにより、網状肋筋１の折曲げ部が床版内に埋設さ
れる。（第５図参照） Ｌ型PC版10,20には網状１の一部が埋設され、同肋筋
１のＣ型肋筋11の折曲げ部13が、Ｌ型PC版10,20の垂直
部片18の上端部から、同肋筋11のフック部14が水平部片
19の内側面から夫々突設しているので、後付けする梁主
筋12,22の係止が確実且つ容易となる。In the L-shaped PC plate 20 shown in FIG. 9, since the edge cutting material 9 'is made of styrene foam, the level of the upper end face of the vertical piece 18 of the PC plate 20 is higher than that of the L-shaped PC plate 10 in FIG. Will also be lower. This L
By constructing a beam formwork using two PC beams 20 and placing concrete in the floor slab (not shown) on the upper part of the formwork and the beam formwork, the bent portion of the reticulated rib 1 is formed. It is buried in the floor slab. (See Fig. 5) A part of the mesh 1 is buried in the L-shaped PC plates 10 and 20, and the bent portion 13 of the C-shaped rib 11 of the same rib 1 is perpendicular to the L-shaped PC plates 10 and 20. From the upper end of the piece 18, the hook part 14 of the rib 11 is a horizontal piece.
Since they are protruded from the inner surfaces of the respective members 19, the locking of the beam main rebars 12, 22 to be retrofitted can be reliably and easily performed.
また、同PC版10,20の角部に梁下端主筋２が、垂直部
片16には横筋（腹筋）３が夫々埋設しているので、梁型
枠に用いるとき大きな荷重負担が可能となる。In addition, since the main bars 2 at the lower ends of the beams are buried at the corners of the PC plates 10 and 20, and the horizontal bars (abdominal muscles) 3 are buried in the vertical pieces 16, a large load can be applied when used for the beam formwork. .
以上のようになるので、精度のよいPC版を短時間に多
量に成型でき、生産性が向上する。As described above, a large number of high-precision PC plates can be molded in a short time, and the productivity is improved.
＜ニ＞Ｌ型PC版10,20によるPC梁型枠（第４図，第５
図） 前記のようにして製造したＬ型PC版10における網状肋
筋１の折曲げ部13やフック部14に、梁下端主筋12及び梁
下端主筋22を後付けする。<D> PC beam formwork using L-shaped PC plates 10 and 20 (Figs. 4 and 5)
Figure) The beam bottom main reinforcement 12 and the beam bottom main reinforcement 22 are retrofitted to the bent portion 13 and the hook portion 14 of the reticulated rib 1 in the L-shaped PC plate 10 manufactured as described above.
このＬ型PC版10を揚重して現場の所定場所に設置し、
２台を一組として、両Ｌ型PC版10,10の水平部片19の端
面同士を向い合わせにして両型枠を構成する。This L-shaped PC version 10 is lifted and installed at a predetermined location on the site,
As a set of two units, both mold frames are configured with the end faces of the horizontal pieces 19 of the L-shaped PC plates 10, 10 facing each other.
次いで、梁型枠上部の床版（図示省略）と共に梁型枠
内にコンクリートを打設して鉄筋コンクリート梁を構築
する。Next, concrete is poured into the beam formwork together with the floor slab (not shown) above the beam formwork to construct a reinforced concrete beam.
（発明の効果） 本発明のPC版の製造方法は、以上説明したようになる
から次ぎのような効果を得ることができる。(Effects of the Invention) The method for manufacturing a PC plate according to the present invention is as described above, and the following effects can be obtained.
＜イ＞鉄筋網を折曲げて、Ｃ型肋筋と腹筋と梁主筋とか
らなる網状肋筋を成形することによって、肋筋を１本ず
つ折曲げて組立てる場合と比べ、作業の大幅な省力化及
び配設精度の向上が図れる。<B> By bending the reinforced mesh to form a reticulated rib composed of C-shaped ribs, abdominal muscles, and beam main bars, the labor required is significantly reduced compared to the case where the ribs are bent one by one and assembled. And the accuracy of arrangement can be improved.
＜ロ＞方形型枠内に、網状肋筋を卍状に配設すると共に
コーナー型枠を配設し、方形型枠と各網状肋筋との間、
及びコーナー型枠と各網状肋筋との間に間隙を設け、遠
心成形法によりＬ型PC版を成型することによって、精度
のよいPC版を短時間に多量に成型できるので、生産性が
向上する。<B> In the square formwork, the reticulated ribs are arranged in a swastika shape and the corner formwork is arranged, between the square formwork and each reticulated rib,
By providing a gap between the corner form and each reticulated rib, and forming the L-shaped PC plate by the centrifugal molding method, high-precision PC plates can be molded in large quantities in a short time, improving productivity. I do.
＜ハ＞また、密実で高強度のＬ型PC版が成型できるの
で、梁構築時の大きな負荷がかかるPC梁型枠兼構造材と
して用いるのに最適である。<C> Also, since a dense and high-strength L-shaped PC plate can be molded, it is most suitable to be used as a PC beam formwork and structural material that places a large load upon beam construction.
＜ニ＞その結果、梁の構築に際し、Ｌ型PC版に後付けの
梁主筋を配設して同PC版を揚重するので、高所での配筋
作業が省け、更に、従来のＵ型PC部材と比べ重量が半分
ですみ、揚重作業が軽減できる。<D> As a result, when constructing the beam, the main beam reinforcement is installed on the L-shaped PC plate and the PC plate is lifted, so that the reinforcing work at high places can be omitted, and the conventional U-shaped Half the weight compared to PC members, reducing lifting work.
第１図 本発明に係わるPC版の製造方法の一実施例にお
ける、方形型枠内への網状肋筋の据付け状況を示す縦断
面図 第２図及び第３図 夫々枠状のコンクリート体を示す縦
断面図 第４図及び第５図 夫々Ｌ型PC版を組立てて梁型枠を構
成した縦断面図 第６図 鉄筋網の縦断面図 第７図 鉄筋網を折曲げて成型した網状肋筋の正面図 第８図及び第９図 夫々Ｌ型PC版の縦断面図 （符号） １……網状肋筋、１′……縦筋、２……梁下端主筋、３
……腹筋（横筋） ５……方形型枠、６……コーナー型枠、７……止め金
具、９……縁切材 10,20……Ｌ型プレキャストコンクリート（PC）版、11
……Ｃ型肋筋 15……鉄筋網、16,17……間隙、18……垂直部片 19……水平部片FIG. 1 is a longitudinal sectional view showing the installation of reticulated ribs in a rectangular form in one embodiment of the method of manufacturing a PC plate according to the present invention. FIG. 2 and FIG. 3 each show a frame-like concrete body. Longitudinal cross section Figs. 4 and 5 Longitudinal cross section of L-shaped PC plate assembled to form beam formwork Fig. 6 Longitudinal cross section of reinforcing bar network Fig. 7 Reticulated rib bars formed by bending reinforcing bar network Fig. 8 and Fig. 9 Longitudinal cross section of L-shaped PC plate (reference numeral) 1 ... reticulated rib, 1 '... vertical bar, 2 ... main beam bottom bar, 3
... abdominal muscle (horizontal muscle) 5 ... square formwork, 6 ... corner formwork, 7 ... fasteners, 9 ... border cutting material 10,20 ... L-type precast concrete (PC) plate, 11
…… C-shaped rib 15 …… Reinforcing mesh, 16,17 …… Gap, 18 …… Vertical piece 19 …… Horizontal piece
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平３−87451（ＪＰ，Ａ) 特開 平２−112904（ＪＰ，Ａ) 特開 昭62−37105（ＪＰ，Ａ) 特開 平２−41203（ＪＰ，Ａ) 特開 平３−19805（ＪＰ，Ａ) 実公 昭46−29572（ＪＰ，Ｙ２) 特公 昭43−7158（ＪＰ，Ｂ１) 実公 昭31−20269（ＪＰ，Ｙ１) (58)調査した分野(Int.Cl.6，ＤＢ名) B28B 23/20,1/20 ──────────────────────────────────────────────────続 き Continuation of front page (56) References JP-A-3-87451 (JP, A) JP-A-2-112904 (JP, A) JP-A-62-37105 (JP, A) JP-A-2- 41203 (JP, A) JP-A-3-19805 (JP, A) JP-A-46-29572 (JP, Y2) JP-B-43-7158 (JP, B1) JP-A-31-20269 (JP, Y1) (58) Field surveyed (Int. Cl. 6 , DB name) B28B 23/20, 1/20
Claims (1)
水平部片の端面を向い合わせにして梁型枠を構成するた
めの、プレキャストコンクリート版の製造方法におい
て、 鉄筋網を折曲げて、Ｃ型肋筋と腹筋と梁下端主筋とから
なる網状肋筋を成形し、 方形型枠内に４組の網状肋筋を、同各網状肋筋の各梁下
端主筋が前記方形型枠の各隅角部と相対するようにし
て、卍状に配設すると共に、前記方形型枠と各網状肋筋
との間にコンクリート被り代分の間隙を設け、 前記各網状肋筋の梁下端主筋と相対してコーナー型枠を
配設すると共に、同コーナー型枠と各網状肋筋との間に
コンクリート被り代分の間隙を設け、 前記各網状肋筋を挟み、方形型枠とコーナー型枠とを止
め金具により固定し、 相隣る網状肋筋の境に縁切材を配設し、 前記方形型枠内にコンクリートを投入して遠心成形法に
より、Ｌ型プレキャストコンクリート版を成型すること
を特徴とした、 プレキャストコンクリート版の製造方法。1. A method of manufacturing a precast concrete slab for forming a beam formwork with a pair of L-shaped precast concrete slabs having end faces of horizontal pieces facing each other, comprising: Form a reticulated rib consisting of muscles, abdominal muscles, and the main bar at the lower end of the beam. Four sets of reticulated ribs are placed in a rectangular form, and the main bar at the lower end of the beam of each reticulated rib is at each corner of the rectangular form. In contrast to the above, arranged in a swastika shape, a gap for the concrete covering allowance is provided between the rectangular form and each reticulated rib, and the beam bottom main rebar of each reticulated rib is provided. In addition to disposing the corner formwork, a gap corresponding to the concrete covering margin is provided between the corner formwork and each reticulated rib, and the square formwork and the corner formwork are clamped with the reticulated ribs therebetween. , And arranging an edge-cutting material at the border between adjacent reticulated ribs, By centrifugal molding method by introducing the concrete into the frame, and wherein the molding the L-type precast concrete panel, method of manufacturing precast concrete panel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7549090A JP2890132B2 (en) | 1990-03-27 | 1990-03-27 | Manufacturing method of precast concrete slab |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7549090A JP2890132B2 (en) | 1990-03-27 | 1990-03-27 | Manufacturing method of precast concrete slab |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03275305A JPH03275305A (en) | 1991-12-06 |
| JP2890132B2 true JP2890132B2 (en) | 1999-05-10 |
Family
ID=13577779
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7549090A Expired - Lifetime JP2890132B2 (en) | 1990-03-27 | 1990-03-27 | Manufacturing method of precast concrete slab |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2890132B2 (en) |
-
1990
- 1990-03-27 JP JP7549090A patent/JP2890132B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH03275305A (en) | 1991-12-06 |
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