JPH0814133B2 - Beam embedded formwork - Google Patents
Beam embedded formworkInfo
- Publication number
- JPH0814133B2 JPH0814133B2 JP13228992A JP13228992A JPH0814133B2 JP H0814133 B2 JPH0814133 B2 JP H0814133B2 JP 13228992 A JP13228992 A JP 13228992A JP 13228992 A JP13228992 A JP 13228992A JP H0814133 B2 JPH0814133 B2 JP H0814133B2
- Authority
- JP
- Japan
- Prior art keywords
- fiber
- concrete
- formwork
- embedded formwork
- embedded
- 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
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- Rod-Shaped Construction Members (AREA)
Description
【０００１】[0001]
【産業上の利用分野】この発明はコンクリート構造物の
梁を施工する際に用いるプレキャストコンクリート製の
梁の埋設型枠に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a precast concrete beam embedded formwork used when constructing a beam of a concrete structure.
【０００２】[0002]
【従来の技術】従来より、セメントモルタルや高強度コ
ンクリートを用いたプレキャスト・コンクリート部材が
コンクリート構造の梁の埋設型枠として用いられている
が、補強筋は主に鉄筋でありプレストレスの導入されて
いない部材が一般的である。2. Description of the Related Art Conventionally, precast concrete members using cement mortar or high-strength concrete have been used as an embedded formwork for beams of concrete structure, but the reinforcing bars are mainly rebars and prestress is introduced. Not common members are common.
【０００３】これは、従来のＰＣ鋼材を用いた技術でセ
メントモルタルや高強度コンクリートを用いた薄肉断面
部材にプレストレスを導入するとコンクリートが割裂破
壊を起こし、割裂破壊防止用の補強筋が必要であるこ
と、また、使用する鋼材が腐食するため、これを保護す
るコンクリートの被覆を厚くする必要があり、コンクリ
ート断面は一般に大きく薄肉断面とはならないのが通常
である。This is because, when a prestress is introduced into a thin-walled cross-section member using cement mortar or high-strength concrete by the technique using conventional PC steel, the concrete causes splitting fracture, and a reinforcing bar for preventing splitting fracture is required. In addition, since the steel material used is corroded, it is necessary to thicken the concrete coating that protects the steel material, and the concrete cross section is generally large and not thin.
【０００４】従って、使用するコンクリートの量は増
し、さらに比重の大きい鋼材の重量とあいまって、製造
された部材の単位重量は大きく、大型部材や長スパンの
部材は不経済となる問題点があった。Therefore, the amount of concrete to be used is increased, and the unit weight of the manufactured member is large in combination with the weight of the steel material having a large specific gravity, and there is a problem that a large member or a member having a long span becomes uneconomical. It was
【０００５】[0005]
【発明が解決しようとする課題】この発明は上記の問題
点に着目しなされたものである。その目的は部材が高強
度であって、軽量化を図ることができ、大型、長スパン
の梁に対応できる梁の埋設型枠を提案するにある。The present invention has been made in view of the above problems. The purpose thereof is to propose a beam embedded formwork which has a high strength member, can be reduced in weight, and can be applied to a beam of a large size and a long span.
【０００６】[0006]
【課題を解決するための手段】この梁の埋設型枠は、短
繊維補強材を混入した繊維補強コンクリートを母材と
し、連続繊維糸条を緊張材として配筋し、プレストレス
を導入してなることを特徴とする。[Means for Solving the Problems] The buried formwork of this beam is constructed by using fiber reinforced concrete mixed with short fiber reinforcement as a base material, and using continuous fiber yarns as tension material to introduce prestress. It is characterized by
【０００７】[0007]
【作用】この埋設型枠は、炭素繊維、芳香族ポリアミ
ド繊維（アラミド繊維）あるいは耐アルカリ性ガラス繊
維等の高引張強度、高引張弾性率の短繊維を混入した繊
維補強コンクリートを母材とし、かつこれら繊維の長繊
維の連続糸条を緊張材として配筋してプレストレスを導
入してあるので、曲げ剛性、曲げ耐力が高く、補強筋量
が少ない薄肉断面となして高強度と軽量化を達成でき
る。The embedded formwork is made of fiber reinforced concrete containing carbon fiber, aromatic polyamide fiber (aramid fiber), alkali resistant glass fiber or other short fiber having high tensile strength and high tensile modulus as a base material, and Since prestress is introduced by arranging continuous filaments of these fibers as a tension material, pre-stress is introduced. Can be achieved.
【０００８】繊維補強したコンクリート母材は薄肉断
面となしても、割裂破壊を起こすことなく、緊張材にプ
レストレスを導入できる。Even if the fiber-reinforced concrete base material has a thin cross-section, prestress can be introduced into the tension material without causing splitting fracture.
【０００９】薄肉断面であっても補強繊維は腐食や、
劣化を起こさず長期にわたり、所期の性能を発揮する。[0009] Even if the cross section is thin, the reinforcing fibers may corrode,
Demonstrate expected performance over a long period without causing deterioration.
【００１０】[0010]
【実施例】図１は実施例のプレストレスコンクリート製
の断面Ｕ型をなした梁の埋設型枠１（以下、Ｕ型ＰＣ埋
設型枠という）を示す。この型枠１は炭素繊維短繊維を
混入した繊維補強コンクリート２を母材とし、Ｕ型底部
には長さ方向に配向した３条の炭素繊維の連続繊維糸条
を芯材とした緊張材３が配筋してあり、プレテンション
によるプレストレスが導入されている。また型枠１の内
面には、幅方向に沿う凹凸条からなるコッター４が設け
てある。EXAMPLE FIG. 1 shows an embedding form 1 for a beam made of prestressed concrete and having a U-shaped cross section (hereinafter referred to as U-type PC embedding form). This formwork 1 has a fiber-reinforced concrete 2 containing short carbon fibers as a base material, and a U-shaped bottom part having a tension material 3 having a continuous fiber yarn of three carbon fibers oriented in the longitudinal direction as a core material. Has been laid out, and prestressing by pretensioning has been introduced. Further, on the inner surface of the mold 1, a cotter 4 formed of a ridge and groove along the width direction is provided.
【００１１】このＵ型ＰＣ埋設型枠１は、柱間に架渡
し、所定の配筋をした後、後打ちの梁コンクリートを打
設して梁を施工する。この施工において、型枠１には配
筋や梁コンクリート、さらに床スラブコンクリート打設
による重量を受けるが、炭素繊維、連続糸条を芯材とす
る緊張材にプレストレスが導入してあるので、長いスパ
ンでも支保工を用いないで、施工ができる。また、型枠
１の内面にはコッター４が形成されてあり、後打コンク
リートと型枠１との一体性が確保される。This U-shaped PC-embedded form 1 is bridged between pillars and after a predetermined reinforcement is arranged, a post-cast concrete beam is placed to construct a beam. In this construction, the formwork 1 receives the weight due to the reinforcement, beam concrete, and floor slab concrete, but prestress is introduced into the tension material with carbon fiber and continuous yarn as the core material. It can be installed even if the span is long without using shoring. Further, a cotter 4 is formed on the inner surface of the mold 1 to ensure the integrity of the post-cast concrete and the mold 1.
【００１２】図２に示す実施例のＵ型ＰＣ埋設型枠１
は、繊維補強コンクリート２を母材とし、Ｕ型底部に緊
張材３を配筋してプレストレスを導入し、内面にコッタ
ー４を形成した点は前記実施例の型枠１と同じである。
この型枠１は内部に□形のせん断補強筋５を幅方向に並
列に配筋してある。せん断補強筋５としては長繊維糸条
を芯材とする繊維強化プラスチック（ＦＲＰ）が好適で
あるが鋼材を用いることもできる。A U-shaped PC-embedded form 1 of the embodiment shown in FIG.
Is the same as the formwork 1 of the above-mentioned embodiment in that the fiber-reinforced concrete 2 is used as a base material, the tension material 3 is laid on the bottom of the U shape to introduce prestress, and the cotter 4 is formed on the inner surface.
This formwork 1 has □ -shaped shear reinforcing bars 5 arranged therein in parallel in the width direction. As the shear reinforcing bar 5, a fiber reinforced plastic (FRP) having a long fiber yarn as a core material is suitable, but a steel material can also be used.
【００１３】この型枠１はせん断補強筋の配筋により、
せん断補強効果の向上と、型枠の運搬や施工時における
破損の防止が図れる。This formwork 1 has a shear reinforcing bar arrangement,
It is possible to improve the shear reinforcement effect and prevent damage during the transportation and construction of the formwork.
【００１４】[0014]
【発明の効果】この発明は以上の通りであり、この梁の
埋設型枠は、次の効果を奏する。The present invention is as described above, and the buried formwork of this beam has the following effects.
【００１５】(イ) 軽量で高強度とすることができ、支保
工を用いず梁の施工ができる。従って、施工の合理化、
省力化、下階部の作業の安全性の向上を図ることができ
る。(B) It is lightweight and has high strength, and it is possible to construct a beam without using a supporting structure. Therefore, the rationalization of construction,
It is possible to save labor and improve the work safety of the lower floors.
【００１６】(ロ) 鉄筋等の鋼材を用いることなく梁の施
工ができるので、耐食性、耐久性が優れ、腐食性ガスが
発生する工場、海洋構造物あるいは地中構造物等に用い
て長期の耐用が可能となる。(B) Since beams can be constructed without using steel materials such as reinforcing bars, they have excellent corrosion resistance and durability, and can be used for a long period of time when used in factories, marine structures or underground structures that generate corrosive gas. It becomes durable.
【図１】実施例のＵ型ＰＣ埋設型枠を示すものであり、
(a) はＢ−Ｂ断面図、(b) はＡ−Ａ断面図である。FIG. 1 shows a U-shaped PC embedded formwork of an embodiment,
(a) is a BB sectional view, and (b) is an AA sectional view.
【図２】別の実施例のＵ型ＰＣ埋設型枠を示すものであ
り、(a) はＤ−Ｄ断面図、(b)はＣ−Ｃ断面図である。2A and 2B show a U-shaped PC-embedded mold of another embodiment, wherein FIG. 2A is a sectional view taken along the line DD, and FIG. 2B is a sectional view taken along the line CC.
１…Ｕ型埋設型枠、２…繊維補強コンクリート、３…緊
張材、４…コッター、５…せん断補強筋。1 ... U-shaped buried formwork, 2 ... Fiber reinforced concrete, 3 ... Tensile material, 4 ... Cotter, 5 ... Shear reinforcement.
Claims (1)
型枠において、短繊維補強材を混入した繊維補強コンク
リートを母材とし、連続繊維糸条を緊張材として配筋
し、プレストレスを導入してあることを特徴とする梁の
埋設型枠。1. In an embedded formwork of a beam made of precast concrete, fiber-reinforced concrete mixed with short-fiber reinforcement is used as a base material, and continuous fiber yarns are used as tension materials to reinforce and introduce prestress. An embedded formwork for beams, which is characterized in that
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13228992A JPH0814133B2 (en) | 1992-05-25 | 1992-05-25 | Beam embedded formwork |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13228992A JPH0814133B2 (en) | 1992-05-25 | 1992-05-25 | Beam embedded formwork |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05321326A JPH05321326A (en) | 1993-12-07 |
| JPH0814133B2 true JPH0814133B2 (en) | 1996-02-14 |
Family
ID=15077809
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13228992A Expired - Lifetime JPH0814133B2 (en) | 1992-05-25 | 1992-05-25 | Beam embedded formwork |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0814133B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20030038135A (en) * | 2001-11-08 | 2003-05-16 | 홍원기 | A concrete construction method using carbon fiber mold |
| JP4545667B2 (en) * | 2005-09-20 | 2010-09-15 | 鹿島建設株式会社 | Floor slab repair method using buried formwork |
| JP7681947B2 (en) * | 2020-04-14 | 2025-05-23 | 株式会社竹中工務店 | pillar wood wall structure |
-
1992
- 1992-05-25 JP JP13228992A patent/JPH0814133B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH05321326A (en) | 1993-12-07 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 19960820 |