JPH0416049B2 - - Google Patents
Info
- Publication number
- JPH0416049B2 JPH0416049B2 JP14683788A JP14683788A JPH0416049B2 JP H0416049 B2 JPH0416049 B2 JP H0416049B2 JP 14683788 A JP14683788 A JP 14683788A JP 14683788 A JP14683788 A JP 14683788A JP H0416049 B2 JPH0416049 B2 JP H0416049B2
- Authority
- JP
- Japan
- Prior art keywords
- concrete
- rod
- shaped body
- pulled out
- elastic material
- 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
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- 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）
本発明は建設用柱、梁等のプレキヤストコンク
リート部材の製造方法に係るものである。DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a method for manufacturing precast concrete members such as construction columns and beams.
（従来の技術）
建造物のプレキヤストコンクリート柱の上下階
柱主筋の接合をシース筋方式によつて行なう場
合、プレキヤストコンクリート梁、壁の主筋用シ
ース部を形成する場合、或いはプレキヤストコン
クリート梁のプレストレスストランドまたは鋼棒
用等のシース部を形成する場合、従来は薄肉鋼製
シース管を所定位置に打込むことによつて、シー
ス部の成形を行なつていた。(Prior art) When connecting the main reinforcements of the upper and lower floors of precast concrete columns of a building using the sheath reinforcement method, when forming a sheath part for the main reinforcement of a precast concrete beam or wall, or when forming a sheath part for the main reinforcement of a precast concrete beam or a precast concrete beam When forming a sheath for a prestressed strand or steel rod, conventionally the sheath was formed by driving a thin-walled steel sheath tube into a predetermined position.
（発明が解決しようとする課題）
この場合、シース管が薄肉鋼製パイプであるた
め、プレキヤストコンクリート部材製作時のコン
クリート打設圧によつて、所定の位置からずれた
り、撓んだり、或いは折れ曲つたりすることが多
く、支障を招来することが多かつた。(Problem to be Solved by the Invention) In this case, since the sheath pipe is a thin-walled steel pipe, it may shift from a predetermined position, bend, or They were often bent and twisted, often causing problems.
また、シース筋挿入後、グラウトモルタルを注
入するが、シース部のグラウトモルタルと部材コ
ンクリートとの境界は薄肉鋼製シース管によつて
絶縁されているため、シース内のグラウト材と部
材の本体コンクリートの一体性が不十分で、構造
耐力上問題が多かつた。 In addition, after inserting the sheath reinforcement, grout mortar is injected, but since the boundary between the grout mortar in the sheath and the component concrete is insulated by a thin-walled steel sheath pipe, the grout in the sheath and the component concrete The integrity of the structure was insufficient, and there were many problems in terms of structural strength.
本発明はこのような従来技術の有する問題点に
鑑みて提案されたもので、その目的とする処は、
主筋、またはプレストレスストランド若しくは鋼
棒の配役用空洞部が部材の所定位置に精確に成形
され、且つ同空洞部に注入されるグラウト材と部
材コンクリートとの一体性が格段に向上させる構
造耐力上有利なプレキヤストコンクリート部材の
製造方法を提供する点にある。 The present invention was proposed in view of the problems of the prior art, and its purpose is to:
The main reinforcing bars, prestressed strands, or steel rod casting cavities are precisely formed in the predetermined positions of the members, and the integrity of the grout injected into the cavities and the concrete of the members is greatly improved, which improves structural strength. It is an object of the present invention to provide an advantageous method for manufacturing a precast concrete member.
（課題を解決するための手段）
前記の目的を達成するため、本発明に係るプレ
キヤストコンクリート部材の製造方法は、プレキ
ヤストコンクリート部材製造用型枠内における補
強鋼材の配設位置に、外周面に弾性材を螺旋状に
巻き付けた棒状体をセツトして前記型枠内にコン
クリートを打設し、同打設コンクリートが未だ固
化しない状態において、前記棒状体を引抜き、次
いで前記弾性材を引抜くように構成されている。(Means for Solving the Problems) In order to achieve the above-mentioned object, the method for manufacturing a precast concrete member according to the present invention provides a method for manufacturing a precast concrete member, in which the outer circumferential surface is A rod-shaped body with an elastic material spirally wound around the mold is set, concrete is poured into the formwork, the rod-shaped body is pulled out while the poured concrete has not yet solidified, and then the elastic material is pulled out. It is configured as follows.
なお前記の方法を遠心成形によつて行なう場合
は、型枠にコンクリートを充填して遠心成形した
直後、順次前記棒状体及び弾性材を引抜くもので
ある。 When the above method is carried out by centrifugal molding, immediately after filling the mold with concrete and centrifugally molding, the rod-shaped body and the elastic material are sequentially pulled out.
また遠心成形によらず、型枠内にコンクリート
を打設するのみで前記の方法を行なう場合、打設
コンクリートの圧縮強度が5.0Kg／cm2程度以上に
なつたとき、順次前記棒状体及び弾性材を引抜く
ものである。 In addition, when performing the above method by simply placing concrete in a formwork without using centrifugal forming, when the compressive strength of the poured concrete reaches approximately 5.0 kg/cm 2 or more, the rod-shaped body and the elastic It is used to pull out wood.
（作用）
本発明においては前記したように、プレキヤス
トコンクリート部材製造用型枠内における補強鋼
材の配置位置に、同補強鋼材を挿通するためのシ
ース部成形用型枠としての、外周面に弾性材を螺
旋状に巻き付けた棒状体をセツトとして、前記プ
レキヤストコンクリート部材製造用型枠にコンク
リートを打設し、同打設コンクリートの未固化状
態のとき前記棒状体を引抜く。(Function) As described above, in the present invention, the outer circumferential surface of the formwork for forming the sheath part for inserting the reinforcing steel material into the placement position of the reinforcing steel material in the formwork for producing precast concrete members has elasticity. Concrete is poured into the formwork for producing precast concrete members using a set of rod-shaped bodies made of spirally wound material, and the rod-shaped bodies are pulled out when the poured concrete is in an unsolidified state.
このとき同棒状体に巻き付けられている弾性材
は周辺の打設コンクリートに固化されているた
め、前記棒状体に引張られて同棒状体と共に抜け
出すことがなく、同棒状体が引抜かれた直後、前
記弾性材は棒状体に巻き付ける際に張力がかかつ
ているため、同弾性材はその弾性によつて収縮し
て打設コンクリートから外れ、容易に引抜かれ
る。 At this time, since the elastic material wrapped around the rod-shaped body is solidified by the surrounding concrete, it will not be pulled out by the rod-shaped body and come out together with the rod-shaped body, and immediately after the rod-shaped body is pulled out. Since tension is applied to the elastic material when it is wound around the rod-shaped body, the elastic material contracts due to its elasticity, detaches from the poured concrete, and is easily pulled out.
この結果、シース部内側表面に連続した螺旋状
をなす、前記弾性材の断面形状の溝を有する所要
のシース部が成形される。 As a result, a desired sheath portion is formed, which has a continuous spiral groove in the cross-sectional shape of the elastic material on the inner surface of the sheath portion.
前記の方法を遠心成形法によつて行なう場合、
打設コンクリートが遠心力によつて圧密されるた
め、前記棒状体の引抜きを遠心成形の直後行つて
も、シース部の空洞が十分に保形される。 When the above method is carried out by centrifugal molding,
Since the poured concrete is consolidated by centrifugal force, the shape of the cavity of the sheath portion is sufficiently maintained even if the rod-shaped body is pulled out immediately after centrifugal forming.
またこの時期は打設コンクリートと前記棒状体
との付着力も低く、同棒状体が容易に引抜かれ
る。 Also, at this time, the adhesion force between the cast concrete and the rod-shaped body is low, and the rod-shaped body is easily pulled out.
遠心成形を行なうことなく、型枠内にコンクリ
ートを打設するのみで前記の方法を行なう場合、
打設コンクリートの圧縮強度が５Kg／cm2程度以上
になつたとき、順次前記棒状体及びこれに巻きつ
けられた弾性体を引抜くことによつて、プレキヤ
ストコンクリート部材中に前記シース部の空洞が
成形される。 If the above method is carried out by simply placing concrete in the formwork without performing centrifugal forming,
When the compressive strength of the poured concrete reaches approximately 5 kg/cm 2 or more, the cavity of the sheath part is formed in the precast concrete member by sequentially pulling out the rod-shaped body and the elastic body wound around it. is formed.
（実施例） 以下本発明を図示の実施例について説明する。(Example) The present invention will be described below with reference to the illustrated embodiments.
第１図及び第２図に示すように、プレキヤスト
コンクリート柱部材製造用型枠１における柱主筋
挿通用シース部に、鋼管や鋼棒等の、コンクリー
ト打設圧により撓曲したり折れ曲らないような十
分の強度を有する棒状体２に、ゴム製のロープ
３、合成繊維製ロープの如き弾性材３を張力をか
けた状態で螺旋状に巻き付けたものをセツトす
る。 As shown in Figs. 1 and 2, steel pipes, steel bars, etc., are bent or bent due to concrete placement pressure in the sheath portion for inserting the column main reinforcement in the formwork 1 for manufacturing precast concrete column members. An elastic material 3 such as a rubber rope 3 or a synthetic fiber rope is wound spirally under tension around a rod-shaped body 2 having sufficient strength such that the rod-like body 2 has sufficient strength.
このとき、前記棒状体２の位置がずれないよう
に、端部が前記型枠に固定される。 At this time, the ends of the rod-like bodies 2 are fixed to the formwork so that the rod-shaped bodies 2 do not shift.
次いでフープ筋４等、必要な鉄筋の配筋を行な
つたのち、コンクリート５を充填し、遠心成形を
行なつた直後、前記棒状体２を引き抜く。このと
き同棒状体２に巻き付けられているゴム製ロープ
は、遠心成形によつて圧密されたコンクリート５
に固定されているため、棒状体２とともに引張ら
れて抜け出すことがなく、同棒状体２が抜けた直
後、ゴム製のロープ３には張力がかかつているた
め、弾性によつて収縮して周辺のコンクリートよ
り外れ、同ロープ３は容易に引き抜かれる。 Next, after arranging necessary reinforcing bars such as hoop reinforcements 4, concrete 5 is filled, and immediately after centrifugal forming, the rod-shaped body 2 is pulled out. At this time, the rubber rope wrapped around the rod-shaped body 2 is made of concrete 5 that has been consolidated by centrifugal molding.
Since it is fixed to the rubber rope 3, it will not be pulled out together with the rod-shaped body 2, and immediately after the rod-shaped body 2 is pulled out, the rubber rope 3 is under tension, so it contracts due to its elasticity, and the surrounding area The rope 3 is easily pulled out from the concrete.
この結果、プレキヤストコンクリート柱部材の
所定位置に、内周面にロープ３の断面形状を有す
る連続した螺旋状の溝が形成されたシース部を容
易に成形することができる。 As a result, a sheath portion in which a continuous spiral groove having the cross-sectional shape of the rope 3 is formed on the inner peripheral surface can be easily formed at a predetermined position of the precast concrete column member.
なお遠心成形の場合は、打設コンクリート５に
遠心力が加わり圧密されているため、シース部成
形用の棒状体２の引抜作業を遠心成形の直後に行
なつても、シース部の空洞を保形することができ
る。またこの時期に前記棒状体２を引き抜く場合
は、打設コンクリート５と同棒状体２との付着力
が低く、同棒状体２の引き抜きが容易に行なわれ
る。 In the case of centrifugal forming, centrifugal force is applied to the poured concrete 5 to consolidate it, so even if the rod-shaped body 2 for forming the sheath part is pulled out immediately after centrifugal forming, the cavity of the sheath part can be maintained. can be shaped. Further, when the rod-shaped body 2 is pulled out at this time, the adhesion force between the cast concrete 5 and the rod-shaped body 2 is low, and the rod-shaped body 2 can be easily pulled out.
また遠心成形によらず、前記型枠内にコンクリ
ートを打設する場合には、打設コンクリートの圧
縮強度が５Kg／cm2以上になつたとき、前記棒状体
２及びゴム製のロープ３を順次引抜くことによつ
て、プレキヤストコンクリート柱部材内に中空シ
ース部を成形するものである。 In addition, when pouring concrete into the formwork without using centrifugal forming, when the compressive strength of the poured concrete reaches 5 kg/cm 2 or more, the rod-shaped body 2 and the rubber rope 3 are sequentially placed. A hollow sheath is formed within the precast concrete column member by pulling it out.
なお前記実施例においては、棒状体２に弾性材
としてゴム製のロープ３が巻き付けられている
が、第３図に示すように、ゴム製チユーブ、合成
樹脂製チユーブ、鋼製チユーブの如きチユーブを
螺旋状に切つたスパイラル状のチユーブ３を棒状
体２に巻き付けてもよい。 In the above embodiment, a rubber rope 3 is wound around the rod-shaped body 2 as an elastic material, but as shown in FIG. A spiral tube 3 cut into a spiral shape may be wound around the rod-shaped body 2.
なお前記実施例はプレキヤストコンクリート柱
部材の主筋用シース部の成形に本発明の方法を適
用した場合を示したものであるが、本発明はこの
他、プレキヤストコンクリート梁部材のプレスト
レスストランド、または鋼棒用シース部、梁主筋
用シース部の成形、プレキヤストコンクリート壁
の壁主筋用シース部の成形に適用される。 Although the above-mentioned example shows the case where the method of the present invention is applied to forming the main reinforcing sheath part of a precast concrete column member, the present invention also applies to prestress strands of a precast concrete beam member, It can also be applied to forming sheath parts for steel bars, sheath parts for beam main reinforcements, and sheath parts for wall main reinforcements in precast concrete walls.
（発明の効果）
本発明によれば前記したように、プレキヤスト
コンクリート部材製造用型枠における補強材の配
設位置に、従来のように薄肉鋼管製シース管をセ
ツトすることなく、外周面に弾性材を螺旋状に巻
き付けた棒状体をセツトしてコンクリートを打設
し、同打設コンクリートが未固化状態のうちに、
前記棒状体、続いて前記弾性材を引抜くことによ
つて、内周面に弾性材の断面形状を有する連続し
た螺旋状の溝を有するシース部を成形するように
したので、前記棒状体を十分な強度を有する部材
より構成することができ、コンクリート打設圧
や、セツト時に受ける外圧等によつて撓曲した
り、折れ曲つたりすることがない。(Effects of the Invention) According to the present invention, as described above, a sheath pipe made of thin-walled steel pipe is not set at the position of reinforcing material in a formwork for producing precast concrete members, as is the case with the conventional method, but can be applied to the outer peripheral surface. A rod-shaped body made of elastic material wound spirally is set and concrete is poured, and while the poured concrete is still unhardened,
By pulling out the rod-shaped body and then the elastic material, a sheath portion having a continuous spiral groove having the cross-sectional shape of the elastic material on the inner peripheral surface is formed. It can be constructed from a member having sufficient strength, and will not bend or bend due to concrete placement pressure, external pressure received during setting, etc.
またプレキヤスコンクリート部材中に成形され
るシース部内周面に形成される螺旋状の溝の断面
形状を、従来のシース管の場合に比して大きな断
面とすることができ、更に前記棒状体に対する弾
性材の巻き付けピツチを調整することによつて、
前記シース部の螺旋状の溝のピツチを細かくした
り、粗くしたり、自由に設計でき、従つて従来の
シース管方式に比してプレキヤストコンクリート
部材のコンクリートとグラウト材との一体性が格
段に向上し、構造耐力上有利である。 In addition, the cross-sectional shape of the spiral groove formed on the inner peripheral surface of the sheath part formed in the precast concrete member can be made larger than that of a conventional sheath pipe, and By adjusting the wrapping pitch of the elastic material,
The pitch of the spiral groove in the sheath part can be made finer or coarser, and can be freely designed, so the integrity of the concrete and grout material in the precast concrete member is much greater than in the conventional sheath pipe system. This is advantageous in terms of structural strength.
更にまた本発明によれば、前記棒状体に巻き付
けられている弾性体は、同棒状体を引抜くとき周
囲のコンクリートに固定されているため、棒状体
と一緒に引張られて引き抜けてくることはなく、
前記棒状体が抜けた直後、弾性体は同棒状体に巻
き付ける際に張力がかかつているため自づと収縮
してコンクリート面より外れ、容易にシース成形
部より引出すことができ、連続した螺旋溝を有す
るシース部をプレキヤストコンクリート部材の本
体コンクリートによつて成形できる。 Furthermore, according to the present invention, the elastic body wrapped around the rod-shaped body is fixed to the surrounding concrete when the rod-shaped body is pulled out, so that the elastic body is pulled out together with the rod-shaped body. Not,
Immediately after the rod-like body is pulled out, the elastic body is under tension when wrapped around the rod-like body, so it automatically contracts and comes off from the concrete surface, and can be easily pulled out from the sheath molding part, forming a continuous spiral groove. The sheath portion having the above can be formed by the main body concrete of the precast concrete member.
請求項２の発明は、前記の方法を遠心成形によ
つて行なう場合、前記棒状体に巻き付けられた弾
性体は遠心成形によつて圧密されたコンクリート
に固定され、棒状体と共に引張られて抜けること
はなく、また型枠内コンクリートが遠心力によつ
て圧密され、前記棒状体を引き抜いてもシース部
空洞を十分に保形できるので、前記棒状体の引抜
き、及びこれに続く弾性体の引抜きを遠心成形の
直後に行なうようにしたもので、しかもこの時
期、打設コンクリートと棒状体との付着力も低く
同棒状体の引抜きが容易に行なわれることと相俟
つて、製造能率を向上しうるものである。 The invention according to claim 2 provides that when the method is carried out by centrifugal molding, the elastic body wound around the rod-shaped body is fixed to concrete consolidated by centrifugal molding, and is pulled out together with the rod-shaped body. In addition, the concrete in the form is consolidated by centrifugal force, and the sheath cavity can be kept in sufficient shape even when the rod-shaped body is pulled out, so that the rod-shaped body and the subsequent elastic body can be pulled out. This is done immediately after centrifugal forming, and at this time, the adhesion between the cast concrete and the bar is low, making it easy to pull out the bar, which can improve manufacturing efficiency. It is something.
請求項３の発明は前記の方法を遠心成形によら
ず、型枠内にコクリートを打設するのみで行なう
場合、打設コンクリートの圧縮強度が5.0Kg／cm2
程度以上になつたとき、前記棒状体及び弾性体を
順次打設コンクリートより引き抜き、製造能率を
向上しうるものである。 According to the third aspect of the invention, when the above method is carried out by simply pouring cocrete into the formwork without using centrifugal molding, the compressive strength of the poured concrete is 5.0 kg/cm 2 .
When it reaches a certain level, the rod-shaped body and the elastic body are sequentially pulled out from the poured concrete, thereby improving manufacturing efficiency.
第１図は本発明に係るプレキヤストコンクリー
ト部材の製造方法の一実施例の実施状況を示す横
断平面図、第２図及び第３図は夫々弾性材が螺旋
状に巻き付けられた棒状体の平面図である。
１……プレキヤストコンクリート柱部材製造用
型枠、２……棒状体、３……ロープ、３′……チ
ユーブ、５……コンクリート。
FIG. 1 is a cross-sectional plan view showing an embodiment of the method for producing precast concrete members according to the present invention, and FIGS. 2 and 3 are plan views of a rod-shaped body around which an elastic material is spirally wound. It is a diagram. 1... Formwork for manufacturing precast concrete column members, 2... Rod-shaped body, 3... Rope, 3'... Tube, 5... Concrete.
Claims (1)
における補強鋼材の配設位置に、外周面に弾性材
を螺旋状に巻き付けた棒状体をセツトして前記型
枠内にコンクリートを打設し、同打設コンクリー
トが未だ固化しない状態において、前記棒状体を
引抜き、次いで前記弾性材を引抜くことを特徴と
するプレキヤストコクリート部材の製造方法。 ２ 前記部材を遠心成形する場合、型枠にコンク
リートを充填して遠心成形した直後、前記棒状体
を引抜き、次いで前記弾性材を引抜く請求項１記
載のプレキヤストコンクリート部材の製造方法。 ３ 遠心成形によらず、型枠内にコンクリートを
打設するのみで前記部材を成形する場合、打設コ
ンクリートの圧縮強度が5.0Kg／cm2程度以上にな
つたとき、前記棒状体を引抜き、次いで前記弾性
材を引抜く請求項１記載のプレキヤストコンクリ
ート部材の製造方法。[Scope of Claims] 1. A rod-shaped body with an elastic material wound spirally around its outer circumferential surface is set at the position where the reinforcing steel material is placed in a formwork for producing precast concrete members, and concrete is poured into the formwork. A method for manufacturing a precast cocrete member, characterized in that the rod-shaped body is pulled out, and then the elastic material is pulled out while the poured concrete has not yet solidified. 2. The method for manufacturing a precast concrete member according to claim 1, wherein when the member is centrifugally formed, the rod-shaped body is pulled out immediately after filling the mold with concrete and centrifugally forming the member, and then the elastic material is pulled out. 3. When forming the above-mentioned member by simply placing concrete in a formwork without using centrifugal forming, when the compressive strength of the poured concrete reaches approximately 5.0 kg/ cm2 or more, the rod-shaped body is pulled out, The method for manufacturing a precast concrete member according to claim 1, wherein the elastic material is then pulled out.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14683788A JPH01316215A (en) | 1988-06-16 | 1988-06-16 | Manufacture of precast concrete member |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14683788A JPH01316215A (en) | 1988-06-16 | 1988-06-16 | Manufacture of precast concrete member |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01316215A JPH01316215A (en) | 1989-12-21 |
| JPH0416049B2 true JPH0416049B2 (en) | 1992-03-19 |
Family
ID=15416649
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14683788A Granted JPH01316215A (en) | 1988-06-16 | 1988-06-16 | Manufacture of precast concrete member |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01316215A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5577741B2 (en) * | 2010-02-23 | 2014-08-27 | 株式会社大林組 | Concrete member manufacturing method, hole forming member |
-
1988
- 1988-06-16 JP JP14683788A patent/JPH01316215A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01316215A (en) | 1989-12-21 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
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| LAPS | Cancellation because of no payment of annual fees |