JPH0416652A - Precast concrete beam member - Google Patents

Precast concrete beam member

Info

Publication number
JPH0416652A
JPH0416652A JP12066590A JP12066590A JPH0416652A JP H0416652 A JPH0416652 A JP H0416652A JP 12066590 A JP12066590 A JP 12066590A JP 12066590 A JP12066590 A JP 12066590A JP H0416652 A JPH0416652 A JP H0416652A
Authority
JP
Japan
Prior art keywords
concrete
formwork
steel wire
wire netting
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.)
Pending
Application number
JP12066590A
Other languages
Japanese (ja)
Inventor
Masao Izaki
井崎 征男
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.)
Sato Kogyo Co Ltd
Original Assignee
Sato Kogyo Co Ltd
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 Sato Kogyo Co Ltd filed Critical Sato Kogyo Co Ltd
Priority to JP12066590A priority Critical patent/JPH0416652A/en
Publication of JPH0416652A publication Critical patent/JPH0416652A/en
Pending legal-status Critical Current

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  • Rod-Shaped Construction Members (AREA)

Abstract

PURPOSE:To discharge bubbles and excess water in ready-mixed concrete out of a formwork through steel wire netting by placing concrete after fixing an inner formwork of U-shaped steel wire netting in suspending condition on a prescribed position in an outer formwork. CONSTITUTION:A U-shaped part 1 made of concrete is formed by placing concrete after fixing an inner formwork in which steel wire netting 2 is bent into U-like form and shear reinforcing members 3 are welded on the inside at regular intervals and they are combined with each other in one body, in suspending condition on a prescribed position in an outer formwork 4. At this time, bubbles and excess water in the placed ready-mixed concrete are discharged out of the formwork through steel wire netting. The whole shear reinforcement 3 are positioned in exposed condition. Hereby, beam main reinforcement 5 can be arranged in the U-shaped space with similar arrangement to that of customary construction method and product of good quality having small ratio water to cement can be obtained.

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梁材に関する。更
に詳しくは、コンクリートにより断面U字形の梁型材を
形成し、その内側空間に口状の剪断補強材を一定の間隔
で連続的に配置しておき、これを現場において立て組み
、剪断補強材に梁主筋を取り付けた上て、U字形の梁材
を型枠としてコンクリートの打設を行う建築方法に用い
られるプレキャストコンクリート梁材に関する。
DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a precast concrete beam. More specifically, a beam member with a U-shaped cross section is formed using concrete, and mouth-shaped shear reinforcing members are placed continuously at regular intervals in the inner space of the beam, and these are erected on site and used as shear reinforcing members. The present invention relates to a precast concrete beam used in a construction method in which concrete is poured using a U-shaped beam as a formwork after attaching beam main reinforcements.

[従来の技術] 上記した建築方法に利用されるプレキャストコンクリー
ト梁材としては、特公昭62−54945号に記載され
ているものが知られている。この梁材は、表面に多数の
空気のうを有するり・ンション材をコアとして、その周
囲に一定の間隔で口状ないし口状の剪断補強材(スタラ
・ンブ筋)を配置したものを内型とし、その周囲に一定
の間隔を設けて外型を配置して、コンクリートの打設を
行い、硬化なまって離型して得られるものである。この
梁材は断面がU字形であり、剪断補強筋の上端部かコン
クリートの上面よりも若干上方に露出した状態になって
おり、また、この剪断補強筋の縦部分は、そのほとんど
がコンクリート中に埋設された状態になっており、更に
、U字形に内周面には、コアとして使用したクツション
材の空気のうによって形成された多数の凹凸が形成され
ており、現場打ちコンクリートとの食い付きが良好にな
るよう工夫されている。
[Prior Art] As a precast concrete beam material used in the above-mentioned construction method, the one described in Japanese Patent Publication No. 54945/1983 is known. This beam material has a core made of tension material that has many air pockets on its surface, and mouth-shaped or mouth-shaped shear reinforcing members (star bars) arranged at regular intervals around the core. It is obtained by forming a mold, placing outer molds at regular intervals around the mold, pouring concrete, and releasing the mold after hardening. This beam has a U-shaped cross section, and the upper end of the shear reinforcement is exposed slightly above the top surface of the concrete.Also, most of the vertical part of the shear reinforcement is in the concrete. Furthermore, the U-shaped inner circumferential surface has many irregularities formed by the air sacs of the cushion material used as the core, which prevents interference with the cast-in-place concrete. It has been devised to ensure good adhesion.

[発明が解決しようとする課題] 上記した従来の梁材においては、剪断補強筋がU字形の
コンクリート中に埋設されてしまっているため、従前か
らの工法である場所打ちコンクリート工法のものと比較
して、剪断補強筋と梁主筋との関係位置が違ったものと
なり、構造上問題視されることになる。
[Problem to be solved by the invention] In the conventional beam materials mentioned above, the shear reinforcing bars are buried in U-shaped concrete, so it is difficult to compare it with the conventional cast-in-place concrete construction method. As a result, the relative positions of the shear reinforcing bars and the beam main reinforcing bars become different, which poses a structural problem.

また、青筋の位置関係を従前の工法のものと同一にしよ
うとすると、現場打ちコンクリートとの食い付きを良好
にするための凹凸(コツター)の形成が非常に煩わしい
ものとなってしまう、上記した従来の梁材のように多数
の空気のうを有するクツション材をコアとして内型を構
成する方法では、上記した2つの課題を解決することは
不可能である。
In addition, if we try to make the positional relationship of the blue stripes the same as that of the previous method, the formation of unevenness (concave and convex) to improve the engagement with the cast-in-place concrete becomes extremely troublesome, as mentioned above. It is impossible to solve the above two problems with a method of constructing an inner mold using a cushion material having a large number of air sacs as a core like a conventional beam material.

そこで1本発明は、上記に鑑み、剪断補強材の関係位置
が従前の工法のものと同一であり、しかも、U字形の内
面に対する凹凸(コツター)の形成が容易である。改良
されたプレキャストコンクリート梁材を提供することを
主目的とするものである。
In view of the above, in the present invention, the relative position of the shear reinforcing material is the same as that of the conventional construction method, and moreover, it is easy to form irregularities on the U-shaped inner surface. The main objective is to provide an improved precast concrete beam material.

[課題を解決するための手段コ 上記目的を達成するため、本発明は、コンクリート製の
断面U字形部材と、その内側空間に剪断補強筋が一定の
間隔で連続的に配列されており、U字形の内周面にコツ
ターが形成されているものにおいて、鋼製ネット材の解
放側(内側)に剪断補強筋が取り付けられており、鋼製
ネット材を内型として利用し、この部分にコツターが形
成され、また、剪断補強筋の主要部分がコンクリート中
に埋設されていない露出状態にあることとしたことを特
徴とする。
[Means for Solving the Problems] In order to achieve the above objects, the present invention comprises a U-shaped cross-section member made of concrete, and shear reinforcing bars are continuously arranged at regular intervals in the inner space of the U-shaped member. In the case where a cotter is formed on the inner peripheral surface of the letter, shear reinforcing bars are attached to the open side (inside) of the steel net material, and the steel net material is used as the inner mold, and the cotter is attached to this part. is formed, and the main part of the shear reinforcement is not buried in the concrete but is exposed.

[実施例] 次に、本発明の実施例を添付の図面に従って詳細に説明
する。
[Example] Next, an example of the present invention will be described in detail with reference to the accompanying drawings.

第1図において、lはコンクリート製のU字形部材であ
り、そのU字形内周面には、鋼製ネット材2が設置され
ており、更に、この鋼製ネット材2の解放側(内側)に
は、一定の間隔で剪断補強筋3が配列されている。
In Fig. 1, l is a U-shaped member made of concrete, and a steel net material 2 is installed on the U-shaped inner peripheral surface, and furthermore, the open side (inner side) of this steel net material 2 is Shear reinforcing bars 3 are arranged at regular intervals.

剪断補強筋3の具体的な形状・構造は第1〜3図に図示
のものに限定されるものではなく1口形状、○形状の外
、スパイラル状のものであってもよい。
The specific shape and structure of the shear reinforcing bars 3 are not limited to those shown in FIGS. 1 to 3, and may be a single-hole shape, a circle shape, or a spiral shape.

鋼製ネ・ント材2としては、金銅、エキスバンドラス、
エキスバンドメタル、パンチングメタルなどが利用され
る。この鋼製ネット材2は、剪断補強筋3を配列するた
めの基材として機能する外、内型として、更には、現場
打ちコンクリートとの食い付きを良好にするための凹凸
(コツター)として機能する。
Steel materials 2 include gilt copper, expanded lath,
Expanded metal, punched metal, etc. are used. This steel net material 2 functions as an outer and inner mold that functions as a base material for arranging the shear reinforcing bars 3, and further functions as a roughness (cotter) to improve the engagement with cast-in-place concrete. do.

本発明に係るプレキャストコンクリート梁材を製造する
には、第3図に示す如く、銅製ネット材2をU字形に折
り曲げ、その内側に、一定の間隔で剪断補強筋3を取り
付ける。この取り付けは。
To manufacture the precast concrete beam material according to the present invention, as shown in FIG. 3, a copper net material 2 is bent into a U-shape, and shear reinforcing bars 3 are attached to the inside thereof at regular intervals. This installation.

溶接による外、細い金属線によって行う、鋼製ネット材
2を予め折り曲げずに、剪断補強筋3を芯として、その
形状に対応して鋼製ネット材2を折り曲げつつ固定して
ゆくようにしてもよい。
In addition to welding, the steel net material 2 is fixed using a thin metal wire, without bending the steel net material 2 in advance, by bending and fixing the steel net material 2 in accordance with the shape of the shear reinforcing bar 3 as a core. Good too.

本発明は上記第1〜3図の実施例の他、第4図や第5図
に示すように構成してもよい。
In addition to the embodiments shown in FIGS. 1 to 3 above, the present invention may be constructed as shown in FIGS. 4 and 5.

上記のように剪断補強筋3と合体させた鋼製ネット材2
を内型として、第3図に仮想線で示す外ylU4の所定
の位置に吊り下げ状態に固定した上て、コンクリートの
打設を行う。このとき、打設した生コンクリート中に含
まれる気泡や余剰水は鋼製ネット材2を通して型外に排
出されるので。
Steel net material 2 combined with shear reinforcing bars 3 as described above
The inner mold is fixed in a suspended state at a predetermined position of the outer ylU4 shown by the imaginary line in FIG. 3, and then concrete is poured. At this time, air bubbles and excess water contained in the poured fresh concrete are discharged out of the mold through the steel net material 2.

水セメント比の小さい良質の梁材が形成されることにな
る。
A high-quality beam material with a small water-cement ratio will be formed.

更に、本発明の梁材では、型内に打設したコンクリート
の養生固化をまって、外型4を取りはずすたけでよく、
従来品の如く、コアとなるクツション材の取りはずし作
業を行う必要かないので、作業能率の点からも有益であ
る。
Furthermore, with the beam material of the present invention, it is only necessary to remove the outer mold 4 after the concrete poured in the mold has cured and hardened.
Unlike conventional products, there is no need to remove the core cushion material, which is also beneficial from the point of view of work efficiency.

また、鋼製ネット材2の部分には凹凸が形成されること
になり、現場打ちコンクリートとのコツターとして機能
することになる。
In addition, unevenness will be formed in the portion of the steel net material 2, and it will function as a bumper with the cast-in-place concrete.

第2図に示すように、本発明に係るプレキャストコンク
リート梁材においては、内型として機能する鋼製ネット
材2の解放側(内側)に、剪断補強筋3の全部分か露出
状態で位置するので、仮想線で示す梁主筋5を、従来工
法である現場打ちコンクリート工法におけるのと同様の
配列でU字形空間内にセットすることが可能となる。頭
記した特公昭62−54945号公報に示されている梁
材においては、前述したように、剪断補強筋3の縦部分
及び底部分が打設したコンクリート中に埋設状態にある
のて、この剪断補強筋3に対して、梁主筋5を接触状態
で固定することが不可能であるから、梁主筋5の組み立
て及び梁材のU字形空間へのセクトが非常に繁雑である
が、上記したように、本発明の梁材によれば、この作業
を容易に、しかも、確実に行うことかてきる利点がある
As shown in FIG. 2, in the precast concrete beam material according to the present invention, all of the shear reinforcing bars 3 are located in an exposed state on the open side (inside) of the steel net material 2 that functions as an inner mold. Therefore, it is possible to set the beam main reinforcements 5 shown by imaginary lines in the U-shaped space in the same arrangement as in the conventional cast-in-place concrete construction method. In the beam material shown in the above-mentioned Japanese Patent Publication No. 62-54945, as mentioned above, the vertical and bottom parts of the shear reinforcing bars 3 are buried in the poured concrete. Since it is impossible to fix the beam main reinforcement 5 in contact with the shear reinforcement 3, the assembly of the beam main reinforcement 5 and the sectioning of the beam material into the U-shaped space are very complicated. Thus, the beam material of the present invention has the advantage that this work can be carried out easily and reliably.

[発明の効果] 本発明に係るプレキャストコンクリート梁材によれば、
■梁主筋の剪断補強筋に対する配列を従来工法のものと
同様に行うことかでき、同時に、■現場打ちコンクリー
トとの食い付きを良好にするためのコツターを形成する
ことができ、■成形時において、打設した生コンクリー
トに含まれる気泡や余剰水が、鋼製ネット材2を通して
排出されるので、水セメント比の小さい良質の製品を得
ることがてきる。■成形後における内型の取りはずし作
業か不要であるから、作業能率がよい、等々の利点が得
られ、頭記した課題が解決される。
[Effect of the invention] According to the precast concrete beam material according to the present invention,
■It is possible to arrange the beam main reinforcements with respect to the shear reinforcement bars in the same way as in the conventional construction method, and at the same time, ■it is possible to form a bumper for good engagement with cast-in-place concrete, and ■it is possible to Since air bubbles and excess water contained in the poured fresh concrete are discharged through the steel net material 2, a high-quality product with a small water-to-cement ratio can be obtained. (2) Since there is no need to remove the inner mold after molding, there are advantages such as high work efficiency, and the above-mentioned problems are solved.

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

第1図は本発明の一実施例を示す斜視図、第2図は同し
く断面図、第3図は成形法を示す斜視図、第4図は、第
5図は各々本発明の他の実施例を示す断面図、である。 図中において各符号は下記を指示する。 1・・・コンクリート製U字形部分 2・・・鋼製ネット材 3・・・剪断補強筋 4・・・外型 手続補正書(方式) 特願平2−120665号 / 発明の名称 プレキャストコンクリート梁材 補正をする者 事件との関係
FIG. 1 is a perspective view showing one embodiment of the present invention, FIG. 2 is a sectional view, FIG. 3 is a perspective view showing a molding method, and FIGS. It is a sectional view showing an example. In the figure, each symbol indicates the following. 1...Concrete U-shaped part 2...Steel net material 3...Shear reinforcement 4...External form procedure amendment (method) Patent application No. 120665/Hei 2-120665/Name of invention Precast concrete beam Relationship with the case of the person making material amendments

Claims (1)

【特許請求の範囲】[Claims] コンクリート製の断面U字形部材と、その内側空間に剪
断補強筋が一定の間隔で連続的に配列されており、U字
形の内周面にコッターが形成されているものにおいて、
鋼製ネット材の解放側(内側)に剪断補強筋が取り付け
られており、鋼製ネット材を内型として利用し、この部
分にコッターが形成され、また、剪断補強筋の主要部分
がコンクリート中に埋設されていない露出状態にあるこ
とを特徴とするプレキャストコンクリート梁材。
A concrete member with a U-shaped cross section, shear reinforcing bars are continuously arranged at regular intervals in the inner space, and a cotter is formed on the inner peripheral surface of the U-shape.
Shear reinforcement is attached to the open side (inner side) of the steel net material, and the steel net material is used as an inner mold, and a cotter is formed in this part, and the main part of the shear reinforcement is attached to the concrete. A precast concrete beam material that is characterized by being exposed and not buried.
JP12066590A 1990-05-10 1990-05-10 Precast concrete beam member Pending JPH0416652A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12066590A JPH0416652A (en) 1990-05-10 1990-05-10 Precast concrete beam member

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12066590A JPH0416652A (en) 1990-05-10 1990-05-10 Precast concrete beam member

Publications (1)

Publication Number Publication Date
JPH0416652A true JPH0416652A (en) 1992-01-21

Family

ID=14791880

Family Applications (1)

Application Number Title Priority Date Filing Date
JP12066590A Pending JPH0416652A (en) 1990-05-10 1990-05-10 Precast concrete beam member

Country Status (1)

Country Link
JP (1) JPH0416652A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102296752A (en) * 2011-06-09 2011-12-28 北京工业大学 Galvanized welded steel wire mesh beam end structure and method for improving ductility of beam end bottom pressure zone
CN105350718A (en) * 2015-11-27 2016-02-24 浙江大学 Reinforcement permanency beam formwork and manufacturing method for concrete structural member with shearing resistance

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102296752A (en) * 2011-06-09 2011-12-28 北京工业大学 Galvanized welded steel wire mesh beam end structure and method for improving ductility of beam end bottom pressure zone
CN105350718A (en) * 2015-11-27 2016-02-24 浙江大学 Reinforcement permanency beam formwork and manufacturing method for concrete structural member with shearing resistance

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