JPH0364663B2 - - Google Patents
Info
- Publication number
- JPH0364663B2 JPH0364663B2 JP7274984A JP7274984A JPH0364663B2 JP H0364663 B2 JPH0364663 B2 JP H0364663B2 JP 7274984 A JP7274984 A JP 7274984A JP 7274984 A JP7274984 A JP 7274984A JP H0364663 B2 JPH0364663 B2 JP H0364663B2
- Authority
- JP
- Japan
- Prior art keywords
- truss
- plate
- pressing force
- bar
- surface plate
- 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
Links
- 238000003825 pressing Methods 0.000 claims description 14
- 239000004567 concrete Substances 0.000 claims description 10
- 238000004519 manufacturing process Methods 0.000 claims description 10
- 230000002787 reinforcement Effects 0.000 claims description 10
- 239000011178 precast concrete Substances 0.000 claims description 9
- 238000009415 formwork Methods 0.000 claims description 7
- 238000005452 bending Methods 0.000 claims description 5
- 238000000034 method Methods 0.000 claims description 5
- 210000003205 muscle Anatomy 0.000 description 6
- 238000010586 diagram Methods 0.000 description 3
- 239000002184 metal Substances 0.000 description 2
- 125000006850 spacer group Chemical group 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Landscapes
- Rod-Shaped Construction Members (AREA)
- Manufacturing Of Tubular Articles Or Embedded Moulded Articles (AREA)
- Panels For Use In Building Construction (AREA)
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、プレストレスト・トラス板の製造方
法に関するものである。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method of manufacturing a prestressed truss plate.
（従来技術）
最近、無支保工法でコンクリート床を構築する
ため、プレストレスト・トラス板（以下、PCト
ラス板と称する）を使用することが検討されてい
る。(Prior Art) Recently, the use of prestressed truss plates (hereinafter referred to as PC truss plates) has been considered for constructing concrete floors using an unsupported construction method.
この種の用途に使用するPCトラス板は、従来、
第１図Ａ，Ｂへ示すようにトラス筋１を予めアー
チ形に形成し、このアーチ形のトラス筋１を第２
図に示すように型枠２内に納めてコンクリート打
設を行うに際し、アーチ形のトラス筋１に押圧力
Ｐにより逆モーメントを加えてトラス筋１を定盤
３上で直線状に付勢し、この状態のままコンクリ
ートの打設を行つてプレキヤスト・コンクリート
板４を形成し、プレキヤスト・コンクリート板４
の強度発現後に押圧力Ｐを除去して第４図に示す
ようにトラス筋１の曲げ剛性を利用した逆モーメ
ントをプレストレスとして内在させたPCトラス
板５を製造していた（特公昭58−14289号）。 Conventionally, PC truss plates used for this type of application are
As shown in FIGS. 1A and B, the truss muscle 1 is formed in an arch shape in advance, and this arch-shaped truss muscle 1 is
As shown in the figure, when placing concrete in the formwork 2, a reverse moment is applied to the arch-shaped truss bar 1 by a pressing force P to force the truss bar 1 linearly on the surface plate 3. , Concrete is poured in this state to form a precast concrete plate 4, and a precast concrete plate 4 is formed.
After the strength was developed, the pressing force P was removed, and as shown in Fig. 4, a PC truss plate 5 was manufactured in which a reverse moment utilizing the bending rigidity of the truss bar 1 was incorporated as a prestress. No. 14289).
しかしながら、このようなPCトラス板５の製
造方法では、トラス筋１に架設時にかかる想定モ
ーメントを予想してそれに適したアーチ形にトラ
ス筋１を予め製造する必要があり、その製造に際
してはトツプ筋１Ａやボトム筋１Ｂを適度なアー
チ形に維持しつつ且つ各筋の溶接熱による伸びも
考慮してラチス筋１Ｃを溶接してゆかなければな
らず、現実は非常に困難な作業となる欠点があ
る。 However, in this method of manufacturing the PC truss plate 5, it is necessary to predict the expected moment that will be applied to the truss bar 1 during erection and to manufacture the truss bar 1 in an arch shape suitable for that in advance. The lattice reinforcement 1C must be welded while maintaining the arched shape of the lattice reinforcement 1A and the bottom reinforcement 1B while also taking into account the elongation of each reinforcement due to the welding heat, which has the disadvantage of being a very difficult task in reality. be.
（発明の目的）
本発明の目的は、高度の技術を要しないで容易
に製造を行うことができるプレストレスト・トラ
ス板の製造方法を提供するにある。(Object of the Invention) An object of the present invention is to provide a method for manufacturing a prestressed truss plate that can be easily manufactured without requiring advanced technology.
（発明の構成）
本発明に係るプレストレスト・トラス板の製造
方法は、直線状のトラス筋を定盤上の型枠内に前
記定盤から浮かして設置し、前記トラス筋に押圧
力を加えて該トラス筋を逆アーチ形に曲げ、この
状態で前記型枠内の前記定盤上にコンクリートを
打設し前記トラス筋の下部を該コンクリート中に
埋設させてプレキヤスト・コンクリート板を形成
し、前記プレキヤスト・コンクリート板の強度発
現後に前記押圧力を除去して前記トラス筋の曲げ
剛性利用の逆モーメントをプレストレスとして内
在させることを特徴とするものである。(Structure of the Invention) The method for manufacturing a prestressed truss plate according to the present invention includes installing linear truss bars within a formwork on a surface plate so as to float from the surface plate, and applying a pressing force to the truss bars. The truss reinforcement is bent into an inverted arch shape, and in this state, concrete is poured onto the surface plate in the formwork, and the lower part of the truss reinforcement is buried in the concrete to form a precast concrete plate, and the The pressing force is removed after the precast concrete plate develops its strength, and a reverse moment utilizing the bending rigidity of the truss reinforcement is incorporated as prestress.
このような方法によれば、直線状の通常のトラ
ス筋を使用でき、逆アーチ形の曲げも単に押圧力
を加えればよいので、プレストレスト・トラス板
の製造を容易に行うことができる。 According to such a method, a normal straight truss bar can be used, and a reverse arch-shaped bending can be performed simply by applying a pressing force, so that a prestressed truss plate can be manufactured easily.
（実施例）
以下本発明の実施例を図面を参照して詳細に説
明する。本実施例では、第５図に示すように通常
の直線状のトラス筋１を使用し、このトラス筋１
を定盤３上の型枠２内に該定盤３から浮かして設
置する。トラス筋１を定盤３から浮かすためにト
ラス筋１の両端の下部にスペーサ６を設置してお
く。かかる状態でトラス筋１の長手方向中央寄り
の位置に押圧力Ｐを加えてトラス筋１に、架設時
等に予想されるモーメントに対抗する逆モーメン
トを与え、トラス筋１を第６図に示すように逆ア
ーチ形に曲げる。かかる状態で、定盤３上の型枠
２内にコンクリートを打設し、トラス筋１の下部
を該コンクリート中に埋設させてプレキヤスト・
コンクリート板４を形成する。プレキヤスト・コ
ンクリート板４が硬化して所定の強度が発現した
ら、押圧力Ｐを除去し、得られたPCトラス板５
を離型すると、トラス筋１は押圧力Ｐの解放によ
り直線状に戻ろうとする力が生じ、プレストレス
ト構造のプレストレスト・トラス板５が得られ
る。(Example) Examples of the present invention will be described in detail below with reference to the drawings. In this example, as shown in FIG. 5, a normal straight truss muscle 1 is used.
is installed in the formwork 2 on the surface plate 3, floating from the surface plate 3. In order to lift the truss bar 1 from the surface plate 3, spacers 6 are installed below both ends of the truss bar 1. In this state, a pressing force P is applied to a position near the center in the longitudinal direction of the truss bar 1 to give the truss bar 1 a reverse moment that opposes the moment expected during erection, etc., and the truss bar 1 is shown in FIG. Bend it into a reverse arch shape. In this state, concrete is poured into the formwork 2 on the surface plate 3, and the lower part of the truss reinforcement 1 is buried in the concrete to form a precast concrete.
A concrete plate 4 is formed. When the precast concrete plate 4 hardens and develops a predetermined strength, the pressing force P is removed and the obtained PC truss plate 5
When released from the mold, the truss bar 1 generates a force that tends to return to a straight line due to the release of the pressing force P, and a prestressed truss plate 5 having a prestressed structure is obtained.
第８図及び第９図は、トラス筋１の押圧力Ｐを
加える加え方の例を示したものである。第８図の
場合には、隣接するトラス筋１の中央側に押え梁
７を乗せ、この押え梁７と定盤３とを万力８で締
めてトラス筋１に押圧力Ｐを加える例を示したも
のである。また、第９図の場合には、定盤３の端
部に押え金具１１を固設し、この押え金具１１の
梁９上への突出部と梁９との間に楔１２を打ち込
み、トラス筋１に押圧力Ｐを加える例を示したも
のである。 8 and 9 show examples of how to apply the pressing force P of the truss muscle 1. In the case of Fig. 8, a presser beam 7 is placed on the center side of the adjacent truss bar 1, and the presser beam 7 and the surface plate 3 are tightened with a vise 8 to apply a pressing force P to the truss bar 1. This is what is shown. In addition, in the case of FIG. 9, a presser metal fitting 11 is fixed to the end of the surface plate 3, and a wedge 12 is driven between the protruding portion of the presser metal fitting 11 onto the beam 9 and the beam 9, and the truss is This shows an example in which a pressing force P is applied to the muscle 1.
（発明の効果）
以上説明したように本発明に係るプレストレス
ト・トラス板の製造方法においては、通常の直線
状のトラス筋を使用でき、その製造が容易であ
り、また該トラス筋の逆アーチ形の曲げも単に押
圧力を加えればよいので、プレストレスト・トラ
ス板の製造を容易に熟練を要さずに行うことがで
きる。従つて、コストの低減も図ることができ
る。(Effects of the Invention) As explained above, in the method for manufacturing a prestressed truss plate according to the present invention, normal linear truss bars can be used, the manufacturing is easy, and the inverted arch shape of the truss bars can be used. Since bending can be done simply by applying pressing force, prestressed truss plates can be easily manufactured without requiring any skill. Therefore, it is also possible to reduce costs.
第１図乃至第４図は従来のプレストレスト・ト
ラス板の製造工程の説明図、第５図乃至第７図は
本発明に係るプレストレスト・トラス板の製造工
程の一例を示す説明図、第８図及び第９図は本発
明でトラス筋を逆アーチ形に曲げる曲げ方の２つ
の例を示した説明図である。
１……トラス筋、２……型枠、３……定盤、４
……プレキヤスト・コンクリート板、５……プレ
ストレスト・トラス板、６……スペーサ。
1 to 4 are explanatory diagrams of the manufacturing process of a conventional prestressed truss plate, FIGS. 5 to 7 are explanatory diagrams showing an example of the manufacturing process of a prestressed truss plate according to the present invention, and FIG. and FIG. 9 are explanatory diagrams showing two examples of how to bend the truss muscle into an inverted arch shape according to the present invention. 1...Truss bar, 2...Formwork, 3...Surface plate, 4
... Precast concrete plate, 5 ... Prestressed truss board, 6 ... Spacer.
Claims (1)
盤から浮かして設置し、前記トラス筋に押圧力を
加えて該トラス筋を逆アーチ形に曲げ、この状態
で前記型枠内の前記定盤上にコンクリートを打設
し前記トラス筋の下部を該コンクリート中に埋設
させてプレキヤスト・コンクリート板を形成し、
前記プレキヤスト・コンクリート板の強度発現後
に前記押圧力を除去して前記トラス筋の曲げ剛性
利用の逆モーメントをプレストレスとして内在さ
せることを特徴とするプレストレス・トラス板の
製造方法。1. A linear truss bar is installed in a formwork on a surface plate so as to float from the surface plate, and a pressing force is applied to the truss bar to bend the truss bar into a reverse arch shape. pouring concrete on the surface plate and burying the lower part of the truss reinforcement in the concrete to form a precast concrete plate;
A method for manufacturing a prestressed truss plate, characterized in that after the strength of the precast concrete plate is developed, the pressing force is removed and a reverse moment utilizing the bending rigidity of the truss reinforcement is incorporated as prestress.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7274984A JPS60219350A (en) | 1984-04-13 | 1984-04-13 | Production of prestressed truss panel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7274984A JPS60219350A (en) | 1984-04-13 | 1984-04-13 | Production of prestressed truss panel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60219350A JPS60219350A (en) | 1985-11-02 |
| JPH0364663B2 true JPH0364663B2 (en) | 1991-10-08 |
Family
ID=13498307
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7274984A Granted JPS60219350A (en) | 1984-04-13 | 1984-04-13 | Production of prestressed truss panel |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60219350A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101876307B1 (en) * | 2017-10-31 | 2018-07-10 | 한국건설기술연구원 | Method and Mold Apparatus for Manufacturing Curved Surface Precast Structure on the based with High Fluidity Cementitious Composite |
-
1984
- 1984-04-13 JP JP7274984A patent/JPS60219350A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101876307B1 (en) * | 2017-10-31 | 2018-07-10 | 한국건설기술연구원 | Method and Mold Apparatus for Manufacturing Curved Surface Precast Structure on the based with High Fluidity Cementitious Composite |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60219350A (en) | 1985-11-02 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |