JP2610462B2 - Method for manufacturing precast concrete member - Google Patents

Method for manufacturing precast concrete member

Info

Publication number
JP2610462B2
JP2610462B2 JP31743187A JP31743187A JP2610462B2 JP 2610462 B2 JP2610462 B2 JP 2610462B2 JP 31743187 A JP31743187 A JP 31743187A JP 31743187 A JP31743187 A JP 31743187A JP 2610462 B2 JP2610462 B2 JP 2610462B2
Authority
JP
Japan
Prior art keywords
concrete
rod
sheath
precast concrete
manufacturing
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 - Fee Related
Application number
JP31743187A
Other languages
Japanese (ja)
Other versions
JPH01159208A (en
Inventor
健夫 瀬口
直志 宮崎
孝次 柳澤
和征 前原
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Taisei Corp
Original Assignee
Taisei Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Taisei Corp filed Critical Taisei Corp
Priority to JP31743187A priority Critical patent/JP2610462B2/en
Publication of JPH01159208A publication Critical patent/JPH01159208A/en
Application granted granted Critical
Publication of JP2610462B2 publication Critical patent/JP2610462B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

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。
The present invention relates to a method for manufacturing a precast concrete member such as a construction column or a beam.

(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って行なう場合、従来は薄肉
鋼製シース管を所定位置に打込むことによって、シース
部の成形を行なっていた。
(Prior Art) When joining the main reinforcements of the upper and lower columns of a precast concrete column of a building by a sheath reinforcement method, conventionally, a sheath portion is formed by driving a thin steel sheath tube into a predetermined position. Was.

(発明が解決しようとする問題点) この場合、シース管が薄肉鋼製パイプであるため、部
材製作時のコンクリート打設圧によって、所定の位置か
らずれたり、撓んだり、折れ曲ったりすることが多く、
爾後の配筋作業に支障を招来することが多かった。
(Problems to be Solved by the Invention) In this case, since the sheath pipe is a thin-walled steel pipe, the sheath pipe may be displaced, bent, or bent from a predetermined position due to the concrete placing pressure at the time of manufacturing the member. Many,
This often hindered the rebar work.

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り絶縁されているので、シー
ス部と部材本体のコンクリートとの一体性に難点があっ
た。
After inserting the sheath muscle, grout mortar is injected. However, since the boundary between the grout mortar of the sheath portion and the member concrete is insulated by a thin steel sheath tube, there is a problem in integration between the sheath portion and the concrete of the member body. was there.

更に打込シース管は、コンクリート打設時の強度確
保、或いはコンクリートとの付着性向上のため、シース
管を波形に加工して凹凸を付しているが、コンクリート
打設時、またはグラウトモルタル施工時にその凹凸部に
空気が滞留したり、或いはブリージング水が滞留し易
く、打設コンクリートの硬化後空洞が生起し、構造的欠
陥部となる欠点があった。
Furthermore, in order to secure the strength at the time of casting concrete or to improve the adhesion to concrete, the sheath tube is processed into a corrugated shape to make the sheath tube corrugated, but when casting concrete or grouting mortar Occasionally, air or bleeding water easily stays in the uneven portions, and cavities are formed after the hardening of the cast concrete, resulting in structural defects.

(問題点を解決するための手段) 本発明はこのような問題点を解決するために提案され
たものであって、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桿状体をセットし
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桿状体を引抜く
ことを特徴とする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。
(Means for Solving the Problems) The present invention has been proposed to solve such problems, and a rod-like member is provided at a position where a reinforcing steel material is disposed in a mold for manufacturing a precast concrete member. And placing concrete in the formwork, and pulling out the rod in a state where the cast concrete has not yet solidified.

(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、同補強筋を挿通するためのシース部成形用型枠とし
ての桿状体をセットして、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に前記桿状体を引抜くこと
によって、プレキヤストコンクリート部材中に表面に波
状凹凸がなく、内周面に異物が介在することのない補強
鋼材挿通用のシース部が形成される。
(Operation) In the present invention, as described above, the rod-shaped body as the sheath part forming mold for inserting the reinforcing bar is set at the position of the reinforcing steel material in the mold for manufacturing the precast concrete member. By casting concrete in the precast concrete member manufacturing formwork and pulling out the rods when the cast concrete is in an unsolidified state, the surface of the precast concrete member has no corrugations. In addition, a sheath portion for penetrating the reinforcing steel material is formed on the inner peripheral surface without foreign matter intervening.

また前記桿状体として、十分な強度剛性を有する部材
を使用することによって、コンクリート打設圧によって
変位、変形することがなく、補強鋼材挿通用シース部の
精度が保持される。
In addition, by using a member having sufficient strength and rigidity as the rod, the rod is not displaced or deformed by the concrete placing pressure, and the accuracy of the reinforcing steel material insertion sheath is maintained.

(実施例) 以下本発明を図示の実施例について説明する。(Example) Hereinafter, the present invention will be described with reference to an illustrated example.

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、同シースの断面に相当する形状を有する鋼
製パイプより構成されたシース部成形用型枠としての桿
状体(2)をセツトする。
As shown in FIGS. 1 and 2, in a precast concrete column member manufacturing form (1), a steel pipe having a shape corresponding to a cross section of the sheath is formed in a column main sheath insertion sheath portion. The rod-shaped body (2) as the sheath forming mold is set.

なお同桿状体(2)は、コンクリートの打設によって
撓んだり、折れないように十分な強度を有するものと
し、更に位置がずれないように端部は型枠(1)に固定
される。
The rod (2) has sufficient strength so that it is not bent or broken by casting concrete, and the end is fixed to the formwork (1) so as not to be displaced.

次いでフープ筋(3)等、必要な鉄筋の配筋を行なっ
たのち、前記型枠(1)内にコンクリート(4)を打設
し、同打設コンクリート(4)が未だ固化しない状態で
前記桿状体(2)を引抜き、シース部を成形する。
Next, after the necessary reinforcing bars such as the hoop bars (3) are arranged, concrete (4) is poured into the formwork (1), and the cast concrete (4) is not solidified yet. The rod (2) is pulled out to form a sheath.

遠心成形の場合、打設コンクリートが遠心力によって
圧密されるため、遠心成形直後直ちに前記桿状体(2)
を引抜いても、シース部空洞を保形することができる。
なおこの時期に、前記桿状体(2)を引抜く場合は、打
設コンクリート(4)と桿状体(2)との付着力が低い
ため、同桿状体(2)を容易に引抜くことができる。
In the case of centrifugal molding, the cast concrete is compacted by centrifugal force.
, The sheath cavity can be maintained.
In this case, when the rod (2) is pulled out at this time, the rod (2) can be easily pulled out because the adhesive force between the cast concrete (4) and the rod (2) is low. it can.

また遠心成形によらず、コンクリート打設のみによっ
て前記柱部材を成形する場合は、打設コンクリートの圧
縮強度が5.0kg/cm2程度以上になったとき、シース部成
形用桿状体(2)を引抜くことによってシース部を成形
するものである。なおこのあと、必要に応じてシース部
内側表面を粗面仕上げとするため、ワイヤーブラシ等に
よって表面の1ロ部を除去し、水洗いを行なってシース
部の成形を完了する。
When the column member is formed only by casting concrete without centrifugal molding, when the compressive strength of the cast concrete becomes about 5.0 kg / cm 2 or more, the sheath-forming rod (2) is formed. The sheath is formed by pulling out the sheath. Thereafter, in order to roughen the inner surface of the sheath portion, if necessary, a portion of the surface is removed with a wire brush or the like, and the sheath portion is completed by washing with water.

前記桿状体(2)としては図示の実施例の如く、角管
の他に、丸管、複数本の小径管、鉄筋が使用され、また
第3図に示すように、ワイヤロープを使用することもで
きる。
As the rod (2), a round tube, a plurality of small-diameter tubes, and a reinforcing bar are used in addition to a square tube as shown in the illustrated embodiment, and a wire rope is used as shown in FIG. Can also.

図中前記実施例と均等部分には同一符号が附さてい
る。
In the figure, the same reference numerals are given to the same parts as those in the above-described embodiment.

なお前記実施例はプレキヤストコンクリート柱部材の
柱主筋用シース部の成形に本発明の方法を適用した場合
を示すものであるが、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トストランド、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 embodiment shows the case where the method of the present invention is applied to the formation of the sheath portion for the column main reinforcement of the precast concrete column member, the present invention also includes a prestressed strand of the precast concrete beam member, or The present invention is applied to forming a sheath portion for a steel rod, a sheath portion for a beam main bar, and forming a sheath portion for a wall main bar of a precast concrete wall.

(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内における補強鋼材の配置位置
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、シース部成形用型枠を構成する桿状体をセツトし
てコンクリートを打設し、同打設コンクリートが未固化
状態のうちに前記桿状体を引抜いてシース部を成形する
ようにしたので、前記桿状体を十分な強度を有する部材
より構成することによってコンクリート打設時の外力に
よって変位、変形することがなく、シース部の精度を確
保できる。
(Effects of the Invention) According to the present invention, as described above, the sheath portion can be formed without setting the thin steel tube sheath tube at the position where the reinforcing steel material is disposed in the mold for manufacturing the precast concrete member as in the related art. Since the rods constituting the forming form are set and concrete is poured, the rod is pulled out while the cast concrete is in an unsolidified state to form a sheath portion. By being composed of a member having high strength, the sheath is not displaced or deformed by an external force at the time of placing concrete, and the accuracy of the sheath portion can be secured.

また前記桿状体を打設コンクリートより引抜くことに
よってシース部を成形することによって、従来のシース
管を使用した場合のような表面に波状凹凸がなく、ブリ
ージング水や空気だまりによりコンクリート中に空隙が
発生することがなく、更に前記桿状体を引抜いたあとの
シース部内には異物の介在がなく、補強鋼材をシース部
に挿入してコンクリートまたはモルタルを充填した後
の、PC部材と補強鋼材との付着性がよい。
Also, by forming the sheath portion by pulling out the rod from the cast concrete, there is no wavy unevenness on the surface as in the case of using a conventional sheath tube, and voids in the concrete due to breathing water or air pools. After the rod is pulled out, there is no foreign matter in the sheath after the rod is pulled out, and the reinforcing steel is inserted into the sheath and filled with concrete or mortar. Good adhesion.

【図面の簡単な説明】[Brief description of the drawings]

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
図は第1図の部分拡大図、第3図は本発明の方法の他の
実施例の実施状況を示す部分横断平面図である。 (1)……プレキヤストコンクリート柱部材製造用型
枠、 (2)……桿状体、(4)……コンクリート
FIG. 1 is a cross-sectional plan view showing an embodiment of a method for manufacturing a precast concrete member according to the present invention.
FIG. 3 is a partially enlarged view of FIG. 1, and FIG. 3 is a partial cross-sectional plan view showing another embodiment of the method of the present invention. (1) Formwork for manufacturing precast concrete column members (2) Rods (4) Concrete

Claims (3)

(57)【特許請求の範囲】(57) [Claims] 【請求項1】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桿状体をセットして前
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桿状体を引抜くこと
を特徴とするプレキヤストコンクリート部材の製造方
法。
1. A rod-shaped body is set at a position where a reinforcing steel material is disposed in a mold for manufacturing a precast concrete member, and concrete is poured into the mold, and the cast concrete is not solidified yet. A method for producing a precast concrete member, wherein a rod-shaped body is pulled out.
【請求項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、前記桿状体を引
抜く特許請求の範囲第1項に所載のプレキヤストコンク
リート部材の製造方法。
2. A method for manufacturing a precast concrete member according to claim 1, wherein, when said member is subjected to centrifugal molding, said rod is pulled out immediately after the concrete is filled in a mold and subjected to centrifugal molding. .
【請求項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程度以上になったとき、
前記桿状体を引抜く特許請求の範囲第1項に所載のプレ
キヤストコンクリート部材の製造方法。
3. In the case where the above-mentioned member is formed by merely casting concrete in a mold without using centrifugal forming, when the compressive strength of the poured concrete becomes about 5.0 kg / cm 2 or more,
2. The method for manufacturing a precast concrete member according to claim 1, wherein the rod is pulled out.
JP31743187A 1987-12-17 1987-12-17 Method for manufacturing precast concrete member Expired - Fee Related JP2610462B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP31743187A JP2610462B2 (en) 1987-12-17 1987-12-17 Method for manufacturing precast concrete member

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP31743187A JP2610462B2 (en) 1987-12-17 1987-12-17 Method for manufacturing precast concrete member

Publications (2)

Publication Number Publication Date
JPH01159208A JPH01159208A (en) 1989-06-22
JP2610462B2 true JP2610462B2 (en) 1997-05-14

Family

ID=18088143

Family Applications (1)

Application Number Title Priority Date Filing Date
JP31743187A Expired - Fee Related JP2610462B2 (en) 1987-12-17 1987-12-17 Method for manufacturing precast concrete member

Country Status (1)

Country Link
JP (1) JP2610462B2 (en)

Also Published As

Publication number Publication date
JPH01159208A (en) 1989-06-22

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