JP2007085169A - Frame structure for placing concrete - Google Patents

Frame structure for placing concrete Download PDF

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JP2007085169A
JP2007085169A JP2006298576A JP2006298576A JP2007085169A JP 2007085169 A JP2007085169 A JP 2007085169A JP 2006298576 A JP2006298576 A JP 2006298576A JP 2006298576 A JP2006298576 A JP 2006298576A JP 2007085169 A JP2007085169 A JP 2007085169A
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slit
fixing member
fixing
earthquake
steady
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Seiji Takahashi
誠治 高橋
Masahiro Hashiba
正博 橋場
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JSP Corp
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JSP Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a frame structure for placing concrete in which a fixing member capable of firmly suppressing the displacement of a quakeproof slit material is used. <P>SOLUTION: This frame structure 120 for placing concrete comprises a swing stopping reinforcement 12 formed of a deformed steel bar with a groove-like recess 21 and the fixing member fixing the quakeproof slit material 10 to the swing stopping reinforcement 12. The fixing member 1 comprises a plurality of groove-like space parts disposed radially from any position of a plate-like base and communicating with each other, forms a plurality of tongue piece-like position fixing parts, and forms an insertion part. The swing stopping reinforcement 12 is inserted into the insertion part. The position fixing part is projected in the direction that the fixing member 1 is inserted into the swing stopping reinforcement 12 along the swing stopping reinforcement 12. The fixing member 1 is inserted so as to come into contact with the slit surface of the quakeproof slit material 10 or come in proximity to the slit surface. The swing stopping reinforcement 12 is fixed to a separate material 13 with a fixing tool. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、コンクリート建造物壁構造に使用される耐震用スリット材における固定部材を利用したコンクリート打設用枠構造体に関し、特にコンクリート打設時の耐震用スリット材にかかる側圧により耐震用スリット材の埋設予定位置からのずれの発生を防止する固定部材を利用したコンクリート打設用枠構造体に関する。 The present invention relates to a frame structure for placing concrete using a fixing member in an earthquake-resistant slit material used for a concrete building wall structure, and more particularly to an earthquake-resistant slit material due to lateral pressure applied to the earthquake-resistant slit material during concrete placement. The present invention relates to a concrete placing frame structure using a fixing member that prevents the occurrence of deviation from the planned embedding position.

従来、鉄筋コンクリート構造物の腰壁または垂れ壁等と、これらの壁に連接する柱との連結近傍に、壁を貫通するように耐震用スリット材を埋設し、地震発生時において、上記耐震用スリット材のスリット芯材を緩衝材として作用させ、壁と柱を分断することで、柱のせん断破壊を回避する方法が知られている。この耐震用スリット材の鉄筋コンクリート構造物への埋没は、上記壁と柱との連結近傍を構築するために対向して立設された型枠の間に配置すると共に、これを型枠に固定し次いで型枠間にコンクリートを打設し、コンクリートが所定時間養生された後、型枠を取り外すという順序で行われる。   Conventionally, an earthquake-resistant slit material is embedded in the vicinity of the connection between the waist wall or hanging wall of a reinforced concrete structure and the pillars connected to these walls so as to penetrate the wall. There is known a method for avoiding shear fracture of a column by causing a slit core material of the material to act as a buffer material and dividing the wall and the column. The seismic slit material is buried in the reinforced concrete structure by placing it between the molds that are erected facing each other in order to construct the vicinity of the connection between the wall and the pillar, and fix it to the mold. Next, concrete is placed between the molds, and after the concrete has been cured for a predetermined time, the molds are removed.

このように、耐震用スリット材は、型枠間に設置されるため、設置作業が容易であることが求められ、更に、型枠間に設置された後において、打設コンクリートの圧力により埋没予定位置から容易にずれを生じたり、押し流されたりしないように、耐震用スリット材は型枠にしっかりと固定されることが求められる。   As described above, since the seismic slit material is installed between the molds, it is required to be easy to install, and after being installed between the molds, it is planned to be buried by the pressure of the cast concrete. It is required that the seismic slit material is firmly fixed to the mold so that it is not easily displaced from the position and is not swept away.

これに対し、以下のような技術が提案されている。
耐震用スリット材の耐震用スリットを装着する耐震用スリット支持体の片面に対して、壁の軸線方向に沿って突出部を設けた支持板と、その支持板の片面に壁の軸線方向に沿って突出する支持腕と、挿通用筒体と、その挿通用筒体を着脱可能な大きさに開けられた孔部からなる耐震用スリットの支持装置であって、孔部は、その支持腕の先端部付近に設けられ、挿通用筒体は、通常壁面に設けられる挿通孔に対して着脱可能に装着すべく構成されている耐震用スリットの支持装置が開示されている(例えば、特許文献1参照。)。
On the other hand, the following techniques have been proposed.
A support plate provided with protrusions along the axial direction of the wall with respect to one side of the earthquake-resistant slit support to which the earthquake-resistant slit material of the earthquake-resistant slit material is attached, and along the axial direction of the wall on one side of the support plate A support device for an earthquake-resistant slit comprising a support arm projecting and an insertion cylinder, and a hole that is sized to allow the insertion cylinder to be attached and detached. An earthquake-resistant slit support device is disclosed that is provided in the vicinity of the distal end and is configured to be detachably attached to an insertion hole that is normally provided in a wall surface (for example, Patent Document 1). reference.).

また、耐震用スリットの板状の芯材と、その芯材の各側端に嵌合し、外端が上記型枠に固定される一対の支持材とを備え、この一対の支持材の外端部に凹部が形成され、この凹部が、型枠に固定された固定部材に嵌合するように構成した耐震用スリット材も開示されている(例えば、特許文献2参照。)。   In addition, a plate-shaped core material of the earthquake-resistant slit, and a pair of support materials that are fitted to each side end of the core material and whose outer ends are fixed to the above-described formwork, the outside of the pair of support materials There is also disclosed an earthquake-resistant slit material in which a recess is formed at the end, and the recess is fitted to a fixing member fixed to the mold (see, for example, Patent Document 2).

また、通常のコンクリート建造物は、耐震性保持のために振れ止め鉄筋を、壁内を水平方向に向かって渡された構造を有する。振れ止め鉄筋に対して、この従来機能と耐震用スリット材の固定補強機能の両方を担わせるようにする技術が開示されている。
これは、耐震用スリット材のスリット芯材によって完全に切り離された柱と壁が、地震等によって面外方向に動かないように、振れ止め鉄筋が耐震用スリット材に取り付けられるというものである(例えば、非特許文献1参照。)。
In addition, a normal concrete structure has a structure in which a steady-reinforcing bar is passed in a horizontal direction in the wall in order to maintain earthquake resistance. A technique is disclosed in which the steadying reinforcing bar can have both the conventional function and the fixing and reinforcing function of the seismic slit material.
This means that the steadying rebar is attached to the earthquake-resistant slit material so that the pillar and wall completely separated by the slit core material of the earthquake-resistant slit material do not move in the out-of-plane direction due to an earthquake or the like ( For example, refer nonpatent literature 1.).

実開昭60−61331号公報Japanese Utility Model Publication No. 60-61331 特開平10−18640号公報Japanese Patent Laid-Open No. 10-18640 「J−スリット」カタログ(株式会社JSP、2002年7月)"J-Slit" catalog (JSP Corporation, July 2002)

しかしながら、上記特許文献1に記載された技術は、以下のような問題点を有する。
すなわち、耐震用スリット材の支持装置は、耐震用スリット材に対して、更に耐震用スリット支持板及び支持腕などの複数種の新たな部材を製作した上で、これらを組み立て、その設置をすることが必要となる。従って、製造コストが上昇する。さらに、型枠間にスリット構造を構築する際、挿通用筒体にセパレータの棒部材を挿通させる必要がある。セパレータを渡す方向に水平なスリット芯材の面における所定の面積あたり1台の割合で上述の支持装置が設置されることに鑑み、大きな壁に対してかかる支持装置を適応する場合に、この挿通作業は、莫大な作業回数を要することになり、従って極めて面倒な作業となる。
However, the technique described in Patent Document 1 has the following problems.
In other words, the seismic slit material support device further assembles and installs a plurality of new members such as a seismic slit support plate and support arm for the seismic slit material. It will be necessary. Accordingly, the manufacturing cost increases. Furthermore, when constructing a slit structure between the molds, it is necessary to insert the separator rod member through the insertion cylinder. In view of the fact that the above-mentioned support device is installed at a ratio of one unit per predetermined area on the surface of the slit core material that is horizontal in the direction in which the separator is passed, this insertion is performed when the support device is applied to a large wall. The work requires an enormous number of work times and is therefore extremely troublesome.

また、特許文献2に記載された技術は、以下のような問題点を有する。すなわち、外端が型枠に固定される一対の支持材を備える耐震用スリット材は、その固定が耐震用スリット材の両端に位置する支持材を両型枠に取り付けられた固定部材へ嵌合しただけの構造であるため、コンクリート打設時に、耐震用スリット材が固定部材から外れたり、或いは耐震用スリット材を構成する板状芯材が支持材から外れてしまう虞があった。特に、コンクリート壁の厚みが厚くなるほどその問題が顕著となった。   Further, the technique described in Patent Document 2 has the following problems. In other words, the earthquake-resistant slit material provided with a pair of support materials whose outer ends are fixed to the formwork is fitted with the support materials positioned at both ends of the earthquake-resistant slit material to the fixing members attached to both the formwork. Because of this structure, there is a risk that the earthquake-resistant slit material may be detached from the fixing member or the plate-like core material constituting the earthquake-resistant slit material may be detached from the support material when the concrete is placed. In particular, the problem became more prominent as the thickness of the concrete wall increased.

非特許文献1に記載された技術は、以下のような問題点を有する。この技術によれば、型枠間の中心付近において、形成されるコンクリート壁と平行且つ水平方向に耐震用スリット材を貫通させて振れ止め鉄筋を配置し、その振れ止め鉄筋を型枠間に配置したセパレート材(セパレータ)に固定すると共に、その振れ止め鉄筋としては、通常の異形棒鋼(JIS G 3112)に、後述する2つのコブの内側間の間隔が耐震用スリット材の厚みよりもやや大きい間隔となるように2箇所にコブを付けたもの(以下、「コブ付き振れ止め鉄筋」という。)を使用し、各コブと耐震用スリット材の間に図7に示す固定部材を取り付けることにより耐震用スリット材の固定力を高め、それによってコンクリート打設時に、耐震用スリット材が固定部材から外れたり、或いは耐震用スリット材を構成する板状芯材が支持材から外れてしまう欠点が改善されてはいるものの固定強度が未だ十分でないという問題がある。更に固定強度を大きくしようと挿通孔50を小さめにすると、固定部材の鉄筋への固定時にねじれ現象が生じてしまい、結果として固定強度を高めることが困難であった。尚、以下、コブ付き振れ止め鉄筋と明示しない場合には、振れ止め鉄筋とは、コブのない通常の異形棒鋼からなる振れ止め鉄筋を意味し、そしてそのコブのない通常の振れ止め鉄筋はコブ無し振れ止め鉄筋ということもある。また、非特許文献1に記載された技術は、耐震用スリット材を固定する場合において、特殊形状を有するコブ付き振れ止め鉄筋の調達が別途要請される。
それゆえ、コンクリート建造物の建築に要する工程数が上昇し、また、その建築コストが上昇する。
The technique described in Non-Patent Document 1 has the following problems. According to this technology, in the vicinity of the center between the molds, the anti-rest bars are arranged by penetrating the earthquake-resistant slit material in parallel with the formed concrete wall and in the horizontal direction, and the anti-rest bars are arranged between the molds. In addition to fixing to the separated material (separator), the normal reinforcing bar (JIS G 3112) is used as a steady bar, and the interval between the two bumps described later is slightly larger than the thickness of the earthquake-resistant slit material. By using a piece with bumps at two locations so as to be spaced apart (hereinafter referred to as “restrests with bumps”) and attaching the fixing members shown in FIG. 7 between each bump and the earthquake-resistant slit material The fixing force of the earthquake-resistant slit material is increased, so that when the concrete is placed, the earthquake-resistant slit material is detached from the fixing member or the plate-like core material constituting the earthquake-resistant slit material is supported. There is a problem that fixing strength of those shortcomings deviates from wood is present is improved is not sufficient yet. Further, if the insertion hole 50 is made smaller to increase the fixing strength, a twisting phenomenon occurs when the fixing member is fixed to the reinforcing bar, and as a result, it is difficult to increase the fixing strength. In the following description, unless it is clearly indicated as a steady rest with a bump, the steady rest means a steady steady reinforcing bar made of ordinary deformed steel bar without a bump, and a normal steady reinforcing bar without a bump is a bump. There is also a steady rest bar. In addition, the technique described in Non-Patent Document 1 requires a separate procurement of a steady-state reinforcing bar with a bump having a special shape when fixing a slit material for earthquake resistance.
Therefore, the number of processes required for building a concrete building increases, and the building cost increases.

また、耐震用スリット材のスリット芯材の厚さが変動すれば、その変動値に応じて、コブ付き振れ止め鉄筋に付されたコブの間隔が変化されねばならない。通常、耐震用スリットのスリット芯材の厚さは、25mm、30mmの厚さのものが殆どであるが、建造物の階高によっては、35mm、40mm、45mm、50mmの厚さのものまで用意しなければならない場合がある。また、通常の振れ止め筋は、耐震用スリット材のスリット芯材本体から、壁柱両側ともに250mm飛び出された長さを有する。しかし、設計者によっては、その飛び出した長さを400mm、500mmにする場合がある。かかる各場合における仕様の全てに対応しうるコブ付の振れ止め鉄筋を製造するとなれば、現実の産業界における企業間取引で、企業が在庫として保存すべきとする通常仕様以外の品種が膨大となり、コスト上好ましくない。   Moreover, if the thickness of the slit core material of the earthquake-resistant slit material varies, the interval between the bumps attached to the steady reinforcing bars with the bumps must be changed according to the variation value. Normally, the thickness of the slit core material for the earthquake-resistant slit is 25 mm or 30 mm, but depending on the floor height of the building, the thickness of 35 mm, 40 mm, 45 mm, or 50 mm is available. You may have to do that. In addition, a normal steady bar has a length that protrudes 250 mm from both sides of the wall column from the slit core body of the earthquake-resistant slit material. However, depending on the designer, the protruding length may be 400 mm or 500 mm. If we produce a steady-state reinforcing bar with a bump that can handle all of the specifications in each of these cases, there will be an enormous number of varieties other than the normal specifications that companies should keep as stock in actual business-to-business transactions. This is not preferable in terms of cost.

本発明は、上記の点に鑑み、コンクリート建造物壁構造において埋没される耐震用スリット材に対してコンクリートを打設する時にかかる側圧により、埋設予定位置からの耐震用スリット材のずれを、容易かつ低コストで強固に抑制できる固定部材を利用したコンクリート打設用枠構造体を提供することを目的とするものである。   In view of the above points, the present invention facilitates displacement of the seismic slit material from the planned embedding position due to the side pressure applied when placing concrete against the seismic slit material buried in the concrete building wall structure. And it aims at providing the frame structure for concrete placement using the fixing member which can be suppressed firmly at low cost.

すなわち、本発明は、
(1) 対向する型枠と、対向する型枠の間隔を保持すべく差し渡されたセパレート材と、耐震用スリット材と、耐震用スリット材のスリット面を貫通して配設される振れ止め鉄筋と、耐震用スリット材と振れ止め鉄筋とを固定する固定部材と、を備えるコンクリート打設用枠構造体において、該振れ止め鉄筋は溝状凹部を有する異形棒鋼からなり、該固定部材は、板状基台の任意の位置から放射線状に配置され相互に連通する複数の溝状空間部を有し、隣合う該溝状空間部間に相互に連通する部位に向かって突出する複数の舌片状の位置固定部を形成し、前記各溝状空間部と各舌片状の位置固定部とによって前記相互に連通する部位に挿通部が形成されてなる構造を有し、該挿通部には該振れ止め鉄筋が挿通されており、該位置固定部が該振れ止め鉄筋に沿って耐震用スリット材と反対側に突出して、該位置固定部の突出部分が該溝状凹部に係止しており、該固定部材は、該耐震用スリット材のスリット面に接するように又はスリット面に近接するように差し込まれ、該振れ止め鉄筋は、固定具によって該セパレート材に固定された構造を備えている、ことを特徴とするコンクリート打設用枠構造体。
That is, the present invention
(1) An opposing mold, a separate material passed to maintain the distance between the opposing molds, an earthquake-resistant slit material, and a steady rest disposed through the slit surface of the earthquake-resistant slit material In a concrete placing frame structure comprising a reinforcing bar, and a fixing member that fixes the seismic slit material and the steadying reinforcing bar, the steadying reinforcing bar is made of a deformed steel bar having a groove-shaped recess, and the fixing member is A plurality of tongues having a plurality of groove-like space portions arranged radially from any position on the plate-like base and projecting toward a portion communicating with each other between the adjacent groove-like space portions It has a structure in which a piece-like position fixing part is formed, and an insertion part is formed at the part communicating with each other by each groove-like space part and each tongue-like position fixing part. Is attached with the steady bar and the position fixing part is Projecting to the opposite side of the seismic slit material along the detent reinforcing bar, the projecting part of the position fixing part is locked in the groove-shaped recess, and the fixing member is on the slit surface of the seismic slit material A concrete pouring frame structure characterized in that it is inserted so as to be in contact with or close to a slit surface, and the steadying reinforcing bar has a structure fixed to the separate material by a fixture.

(2) 該振れ止め鉄筋と該固定部材における位置固定部の突出部分との接触部において、接触角度αが80〜10度であることを特徴とする上記(1)に記載のコンクリート打設用枠構造体。
を要旨とするものである。
(2) The contact angle α is 80 to 10 degrees at the contact portion between the steady bar and the protruding portion of the position fixing portion of the fixing member. Frame structure.
Is a summary.

本発明によれば、コンクリート建造物の壁構造を形成するために使用される耐震用スリット材と振れ止め鉄筋とを固定する固定部材として、板状基台の任意の位置から放射線状に配置され相互に連通する複数の溝状空間部を有し、隣合う該溝状空間部間に相互に連通する部位に向かって突出する複数の舌片状の位置固定部を形成し、前記各溝状空間部と各舌片状の位置固定部とによって前記相互に連通する部位に鉄筋の挿通部が形成されてなる形状からなる固定部材を用いたことにより、耐震用スリット材のスリット面を貫通する触れ止め鉄筋として入手容易なコブの無い通常の振れ止め鉄筋を使用しても、耐震用スリット材と振れ止め鉄筋とを強固に固定することができる。   According to the present invention, as a fixing member for fixing a seismic slit material and a steady bar used for forming a wall structure of a concrete building, it is arranged radially from an arbitrary position on a plate-like base. A plurality of groove-shaped space portions communicating with each other, and a plurality of tongue-shaped position fixing portions projecting toward a portion communicating with each other between the adjacent groove-shaped space portions are formed; By using a fixing member having a shape in which a reinforcing bar insertion portion is formed at the portion communicating with each other by the space portion and each tongue-like position fixing portion, the slit surface of the earthquake-resistant slit material is penetrated. Even if a normal steady-state reinforcing bar without a hump, which is easily available as a contact-reinforcing bar, is used, the seismic slit material and the steady-state reinforcing bar can be firmly fixed.

本発明に利用される固定部材は、振れ止め鉄筋を挿通部に挿通させるという簡単な操作の際に、板状基台の一方の面(両面や表面にあってもよいが、通常は裏面)において隣合う溝状空間部における相互に連通する部位に対向する外縁側端部近傍の前記溝状空間部を結ぶ位置に形成された凹部がバネ的なヒンジ作用によって広がり、位置固定部の舌片が突出して振れ止め鉄筋に当接し、位置固定部の突出部分が振れ止め鉄筋の溝状凹部にフィットして十分な押圧力を有するようにすることができ、耐震用スリット材への側圧に抗して耐震用スリット材の移動を抑制する効果を奏するのである。   The fixing member used in the present invention is one surface of the plate-like base (which may be on both surfaces or the surface, but is usually the back surface) in the simple operation of inserting the steady bar in the insertion portion. In the adjacent groove-shaped space portion, a recess formed at a position connecting the groove-shaped space portions in the vicinity of the outer edge side end portions facing each other is expanded by a spring-like hinge action, and the tongue of the position fixing portion Can protrude and abut against the steady bar, and the protruding part of the position fixing part can fit into the grooved recess of the steady bar and have sufficient pressing force, resisting the side pressure on the seismic slit material Thus, the effect of suppressing the movement of the earthquake-resistant slit material is exhibited.

以下に、本発明を図面によりその実施態様を説明する。
図1は、本発明に利用される固定部材を用いて構成した耐震用スリット材を備えた構造体の一実施例を説明するための断面図を示す。
図2は、本発明に利用される振れ止め鉄筋と耐震用スリット材とを固定する固定部材の一例を示す。図2(1)は上面図、図2(2)は下面図をそれぞれ示す。
図3は、前記固定部材の別の実施例の一例を示し、図3(1)は上面図、図3(2)は下面図をそれぞれ示す。
図4は、本発明に利用される固定部材により振れ止め鉄筋と耐震用スリット材とを固定した状態を説明する部分断面図である。
Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 shows a cross-sectional view for explaining an embodiment of a structural body provided with a seismic slit material configured using a fixing member used in the present invention.
FIG. 2 shows an example of a fixing member for fixing the steadying reinforcing bar and the earthquake-resistant slit material used in the present invention. 2A is a top view, and FIG. 2B is a bottom view.
FIG. 3 shows an example of another embodiment of the fixing member, FIG. 3 (1) shows a top view, and FIG. 3 (2) shows a bottom view.
FIG. 4 is a partial cross-sectional view illustrating a state in which the steady bar and the earthquake-resistant slit material are fixed by the fixing member used in the present invention.

まず、本発明に利用される振れ止め鉄筋とスリット材とを固定する固定部材について、図2を例に説明する。
固定部材1は、板状基台6の中央部から放射線状に配置され相互に連通する複数の溝状空間部4を有し、隣合う該溝状空間部4間に中心部に向かって突出する複数の舌片状の位置固定部3を形成し、前記各溝状空間部4と各舌片状の位置固定部3とによって中心部に振れ止め鉄筋12の挿通部2が形成されている。
また、板状基台6の一方の面(両面や表面にあってもよいが、通常は裏面)には、図2(2)に示すように、前記溝状空間部4の中心部に対向する外縁側端部近傍の前記溝状空間部4を結ぶ位置に凹部26が形成されている。該凹部26は、振れ止め鉄筋12を挿通部2に挿通した際に、図4に示すように位置固定部3が該振れ止め鉄筋12に沿って突出するようにヒンジ機能を有するものである。
First, a fixing member for fixing the steady bar and the slit material used in the present invention will be described with reference to FIG.
The fixing member 1 has a plurality of groove-like space portions 4 that are radially arranged from the center portion of the plate-like base 6 and communicate with each other, and protrudes toward the center portion between the adjacent groove-like space portions 4. A plurality of tongue-like position fixing portions 3 are formed, and the insertion portion 2 of the steady-state reinforcing bar 12 is formed at the center by each groove-like space portion 4 and each tongue-like position fixing portion 3. .
Further, as shown in FIG. 2 (2), one surface of the plate-like base 6 (which may be on both surfaces or the front surface, but usually the back surface) is opposed to the central portion of the groove-like space portion 4. A concave portion 26 is formed at a position connecting the groove-like space portion 4 in the vicinity of the outer edge side end portion. The recessed portion 26 has a hinge function so that the position fixing portion 3 protrudes along the steady-state reinforcing bar 12 as shown in FIG. 4 when the steady-state reinforcing bar 12 is inserted into the insertion portion 2.

本発明に利用される前記固定部材1は、合成樹脂からなるものが好適に使用される。その合成樹脂としては、特に、曲げ弾性率(ASTM D 790)が1900MPa〜16000MPaのものが好ましく、2000MPa〜10000MPaのものがより好ましい。また、その合成樹脂としては、特に、曲げ強度(ASTM D 790)が40MPa〜200MPaのものが好ましい。以上のような合成樹脂で前記固定部材1を形成すると、挿入された振れ止め鉄筋12に対して位置固定部3の突出部分は十分な押圧力を有し、振れ止め鉄筋12の溝状凹部21にフィットし容易に移動しない。したがって、振れ止め鉄筋12の挿入により位置固定部3の突出部分は振れ止め鉄筋12の溝状凹部21に係止して耐震用スリット材10への側圧に抗して耐震用スリット材10の移動を抑制する効果を奏するのである。本発明において前記固定部材1に好適な合成樹脂としては、ABS樹脂、ポリカーボネート樹脂、又はそれらの混合樹脂が具体的に例示される。また、本発明に利用される前記固定部材1の厚さは、2〜5mm程度のものが一般的に採用される。厚さが2mm未満では外部からの力(例えば、スリット芯材11にかかる側圧)に抗しきれず変形する虞がある。一方5mmを超える厚さでは、振れ止め鉄筋を挿入するに際して過大な力を必要とし、現場施工において扱い難く不都合となる虞がある。前記固定部材1を合成樹脂で形成する場合には、射出成形法を採用すると効率よく製造することができる。尚、本発明に利用される前記固定部材1は、コスト面で多少不利であるが、ステンレス等のバネ弾性の大きい金属製のものであっても構わない。   The fixing member 1 used in the present invention is preferably made of a synthetic resin. As the synthetic resin, in particular, one having a flexural modulus (ASTM D 790) of 1900 MPa to 16000 MPa is preferable, and one having 2000 MPa to 10,000 MPa is more preferable. The synthetic resin is particularly preferably one having a bending strength (ASTM D 790) of 40 MPa to 200 MPa. When the fixing member 1 is formed of the synthetic resin as described above, the protruding portion of the position fixing portion 3 has sufficient pressing force with respect to the inserted steadying reinforcing bar 12, and the groove-shaped recess 21 of the steadying reinforcing bar 12. Fits and doesn't move easily. Therefore, the protruding portion of the position fixing portion 3 is engaged with the groove-shaped recess 21 of the steady-state reinforcing bar 12 by the insertion of the steady-state reinforcing bar 12, and the movement of the earthquake-resistant slit material 10 against the lateral pressure to the earthquake-resistant slit material 10. The effect which suppresses is produced. Specific examples of the synthetic resin suitable for the fixing member 1 in the present invention include ABS resin, polycarbonate resin, or a mixed resin thereof. The thickness of the fixing member 1 used in the present invention is generally about 2 to 5 mm. If the thickness is less than 2 mm, there is a risk of deformation without resisting external force (for example, lateral pressure applied to the slit core 11). On the other hand, when the thickness exceeds 5 mm, an excessive force is required when inserting the steady rest, which may be inconvenient and inconvenient in field construction. When the fixing member 1 is formed of a synthetic resin, it can be efficiently manufactured by adopting an injection molding method. The fixing member 1 used in the present invention is somewhat disadvantageous in terms of cost, but may be made of a metal having a large spring elasticity such as stainless steel.

本発明に使用される振れ止め鉄筋12はコンクリート建造物の鉄筋として用いられ壁構造に埋設されるものでその表面には一定間隔の凹凸部が設けられ一定の深さを有する溝状凹部21を有する構造の異形棒鋼である。特にその異形棒鋼としては、JIS G3112−1987に規定される異形棒鋼の内、SD295AのD10タイプのものは、鉄筋コンクリートに使用される鉄筋として一般的であることから、施工現場において容易に且つ安価に調達することができる点で最も好ましい。   The steady rest reinforcing bar 12 used in the present invention is used as a reinforcing bar for a concrete building and is embedded in a wall structure, and has a groove-like recess 21 having a certain depth on the surface thereof and having a certain depth. It is a deformed steel bar with a structure. In particular, as the deformed bar steel, among the deformed bar steels defined in JIS G3112-1987, the SD295A D10 type steel bar is commonly used as a steel bar for reinforced concrete. Most preferable in that it can be procured.

前記固定部材1の挿通部2は、振れ止め鉄筋12が挿通される部位であってその孔径(前記固定部材1における対向する舌片状の突出部間の距離)は使用される振れ止め鉄筋の溝状凹部21の直径よりも小さい孔径に形成されており、該孔径は、上記溝状凹部21の直径よりも2mm以内の範囲で小さい値であることが好ましく、より好ましくは0.2mmから0.8mmの範囲で小さい値であることが望ましい。   The insertion part 2 of the fixing member 1 is a part through which the steady bar 12 is inserted, and the hole diameter (the distance between the tongue-like protrusions facing each other in the fixing member 1) of the steady bar used. The hole diameter is smaller than the diameter of the groove-shaped recess 21, and the hole diameter is preferably a value smaller than the diameter of the groove-shaped recess 21 within a range of 2 mm, more preferably 0.2 mm to 0. A small value in the range of .8 mm is desirable.

本発明に利用される振れ止め鉄筋12と耐震用スリット材10とを固定する固定部材1は、該固定部材1における隣合う溝状空間部4の外側端部近傍を結ぶ位置に凹部26が設けられた側から挿通部2に振れ止め鉄筋12が挿入され、振れ止め鉄筋12を挿入した際、凹部26のヒンジ機能によって広がり、図4に示すように位置固定部3の舌片が突出して振れ止め鉄筋12に当接した状態で、耐震用スリット材10のスリット面11aに固定部材1の基台6が密着して、振れ止め鉄筋12と耐震用スリット材10とが強固に固定される。   In the fixing member 1 for fixing the steadying reinforcing bar 12 and the earthquake-resistant slit material 10 used in the present invention, a recess 26 is provided at a position connecting the vicinity of the outer end portion of the adjacent groove-like space portion 4 in the fixing member 1. When the steady bar 12 is inserted into the insertion part 2 from the inserted side and the steady bar 12 is inserted, it spreads by the hinge function of the recess 26, and the tongue of the position fixing part 3 protrudes and swings as shown in FIG. The base 6 of the fixing member 1 is brought into close contact with the slit surface 11a of the earthquake-resistant slit material 10 in a state of being in contact with the stop reinforcing bar 12, so that the steady-state reinforcing bar 12 and the earthquake-resistant slit material 10 are firmly fixed.

該固定部材1は、前記したように優れた曲げ弾性率、曲げ強度等の機械的特性を有する合成樹脂からなる成形品で構成されているので挿入された振れ止め鉄筋12に対して位置固定部3の突出部分は十分な押圧力を有し、振れ止め鉄筋12の溝状凹部21にフィットし容易に移動しない。したがって、振れ止め鉄筋12の挿入により位置固定部3の突出部分は振れ止め鉄筋12の溝状凹部21に係止して耐震用スリット材10への側圧に抗して耐震用スリット材10の移動を抑制する効果を奏するのである。
振れ止め鉄筋12と固定部材1における位置固定部3の突出部分との接触部において、接触角度(図4における角度α)が80〜10度となる範囲であることが、耐震用スリット材10に対する壁側からの力(側圧)に抗して耐震用スリット材10の移動を抑制する効果を十分にかつ効果的に発揮する上で好ましく、さらには70〜20度の範囲が好ましく、より好ましくは60〜30度である。このように構成すると、固定部材1の挿通部2を振れ止め鉄筋12に挿通させた後はしっかりと固定され、挿通させてきた向きとは反対向き(図4では右側)には移動が困難となるため、コンクリート打ち込み時の耐震用スリット材10又はスリット芯材11の外れが生じにくいものとなる。
また、振れ止め鉄筋12に固定部材1の挿通部2を通す前の状態における図4における角度αに相当する角度は85〜20度であることが好ましく、80〜15度であることがより好ましく、75〜25度であることが更に好ましい。このように構成すると、固定部材1の挿通部2を振れ止め鉄筋12に差し込むに際しては、振れ止め鉄筋12への挿通が容易となる。
なお、前記固定部材1における溝状空間部4の中心部からの長さ、空間部の幅は適宜決められ特に制限されないが、これらは固定部材1の全体の大きさ(平面積)、使用される振れ止め鉄筋12の太さなどを勘案して適宜の長さが選択される。例えば、上記溝状空間部4は基台6の外周縁部を貫通しなくしかも基台6がスリット面と十分に当接し得る面積を有する程度の長さに形成される。
Since the fixing member 1 is formed of a molded product made of a synthetic resin having mechanical properties such as excellent bending elastic modulus and bending strength as described above, the fixing member 1 is positioned with respect to the steady rest bar 12 inserted. The protruding portion 3 has a sufficient pressing force, fits into the groove-like recess 21 of the steady bar 12 and does not move easily. Therefore, the protruding portion of the position fixing portion 3 is engaged with the groove-shaped recess 21 of the steady-state reinforcing bar 12 by the insertion of the steady-state reinforcing bar 12, and the movement of the earthquake-resistant slit material 10 against the lateral pressure to the earthquake-resistant slit material 10. The effect which suppresses is produced.
In the contact portion between the steady bar 12 and the protruding portion of the position fixing portion 3 in the fixing member 1, the contact angle (angle α in FIG. 4) is in a range of 80 to 10 degrees with respect to the earthquake-resistant slit material 10. It is preferable to sufficiently and effectively exert the effect of suppressing the movement of the earthquake-resistant slit material 10 against the force (side pressure) from the wall side, more preferably in the range of 70 to 20 degrees, more preferably. 60 to 30 degrees. If comprised in this way, after inserting the insertion part 2 of the fixing member 1 through the steady-state reinforcing bar 12, it is firmly fixed, and it is difficult to move in the direction opposite to the direction in which it has been inserted (right side in FIG. 4). Therefore, it becomes difficult for the seismic slit material 10 or the slit core material 11 to be detached when the concrete is driven.
Further, the angle corresponding to the angle α in FIG. 4 in a state before passing the insertion portion 2 of the fixing member 1 through the steady bar 12 is preferably 85 to 20 degrees, and more preferably 80 to 15 degrees. 75 to 25 degrees is more preferable. If comprised in this way, when inserting the insertion part 2 of the fixing member 1 in the steadying reinforcing bar 12, the penetration to the steadying reinforcing bar 12 becomes easy.
In addition, the length from the center part of the groove-shaped space part 4 in the fixing member 1 and the width of the space part are appropriately determined and are not particularly limited, but these are used for the entire size (planar area) of the fixing member 1. An appropriate length is selected in consideration of the thickness of the steady rest reinforcing bar 12 and the like. For example, the groove-like space 4 is formed to a length that does not penetrate the outer peripheral edge of the base 6 and has an area where the base 6 can sufficiently contact the slit surface.

また、固定部材1が耐震用スリット材と振れ止め鉄筋とを固定するものであることに鑑み、本発明に利用される固定部材は、複数の溝状空間部4が板状基台6の任意の位置から放射線状に配置され相互に連通し、隣合う該溝状空間部4間が相互に連通する部位に向かって舌片状に突出した複数の位置固定部3が形成され、前記各溝状空間部4と各舌片状の位置固定部3とによって前記相互に連通する部位に振れ止め鉄筋12の挿通部2が形成されている構造を備えておれば、挿通部2の位置は必ずしも板状基台6の中心部である必要はなく、また溝状空間部4の板状基台6の中心部から又は挿通部2の中心部からの長さが必ずしも各溝状空間部4で同じ長さである必要はない。ただし、各溝状空間部4の挿通部2の中心部からの長さが個々に相違すれば、振れ止め鉄筋12と耐震用スリット材10との固定が不安定になる虞があるので、各溝状空間部4の挿通部2の中心部からの長さは、相互にほぼ等しいことが好ましく、均等であることがより好ましい。   In view of the fact that the fixing member 1 fixes the earthquake-resistant slit material and the steady bar, the fixing member used in the present invention has a plurality of groove-like space portions 4 of the plate-like base 6. A plurality of position fixing portions 3 are formed, which are arranged in a radial pattern from each position and project in a tongue shape toward a portion where the adjacent groove-like space portions 4 communicate with each other. If the structure in which the insertion part 2 of the steady bar 12 is formed in the portion communicating with each other by the dent-like space part 4 and each tongue-like position fixing part 3, the position of the insertion part 2 is not necessarily limited. The center of the plate-like base 6 does not need to be, and the length of the groove-like space 4 from the center of the plate-like base 6 or the center of the insertion portion 2 is not necessarily the length of each groove-like space 4. It need not be the same length. However, if the lengths from the central part of the insertion part 2 of each groove-like space part 4 are different from each other, there is a risk that the fixation between the steady bar 12 and the earthquake-resistant slit material 10 may become unstable. It is preferable that the length from the center part of the insertion part 2 of the groove-shaped space part 4 is substantially equal mutually, and it is more preferable that it is equal.

また、固定部材1における前記溝状空間部4の数は、振れ止め鉄筋12に対して位置固定部3の突出部分が均等に当接し側圧に対して変形しないことが必要である観点から少なくとも2個存在することが必要である。余りにも多い場合は位置固定部3の突出部分の振れ止め鉄筋12に対する押圧力が低下し側圧に対する強度が低下し変形し易くなる虞がある。従って、固定部材1における前記溝状空間部4の数は、3〜6個が好ましく、4個がより好ましい。   Further, the number of the groove-like space portions 4 in the fixing member 1 is at least 2 from the viewpoint that the protruding portion of the position fixing portion 3 is in contact with the steady bar 12 and does not deform with respect to the side pressure. It is necessary to exist. When the number is too large, the pressing force of the protruding portion of the position fixing portion 3 against the steady bar 12 is lowered, the strength against the side pressure is lowered, and there is a possibility that the deformation becomes easy. Therefore, the number of the groove-like space portions 4 in the fixing member 1 is preferably 3 to 6, and more preferably 4.

固定部材1を用いて構成した耐震用スリット材10を備えたコンクリート打設用枠構造体の実施態様について説明する。
図1は、固定部材1を用いて構成した耐震用スリット材10を備えたコンクリート打設用枠構造体の実施例を説明する断面図である。
An embodiment of the concrete placing frame structure provided with the earthquake-resistant slit material 10 constituted by using the fixing member 1 will be described.
FIG. 1 is a cross-sectional view for explaining an embodiment of a concrete placing frame structure including an earthquake-resistant slit material 10 constituted by using a fixing member 1.

図1において、耐震用スリット材10を備えたコンクリート打設用枠構造体は、コンクリート建造物の壁材と該壁材に連なる柱(柱側の型枠等は図から省略)との接合部付近に壁材を貫通するように埋設される耐震用スリット材10が、前記接合部を構築するために対向して立設される型枠15、15間に配置された構成を備える。該耐震用スリット材10は、合成樹脂15重量%〜100重量%と炭酸カルシウムやタルク等の無機紛体85重量%〜0重量%とからなる板状の発泡体等からなるスリット芯材11と、該スリット芯材11の両端部を支持する一対の支持部材20を備える。該支持部材20は、スリット芯材11の側端部を装着する嵌合部19、19と、前記型枠15に設けられた支持部材20の固定部(目地部)17に装着される装着部18、18とを備えた構造からなり、該耐震用スリット材10は少なくとも1個所にスリット芯材11を貫通する振れ止め鉄筋12を備え、該スリット芯材11を貫通して設けられた振れ止め鉄筋12には、スリット芯材11のスリット面11aに当接して振れ止め鉄筋12と耐震用スリット材10とを固定する固定部材1が設置されており、相対する型枠15、15間にはセパレート材13が設けられ、振れ止め鉄筋12とセパレート材13との交叉部に両者を固定するための固定具14が設けられてコンクリート打設用枠構造体が構成されている。
なお、固定部材1と当接するスリット芯材の面は、通常は、柱に近い側(壁に連接する柱と連結近傍における柱側)とは反対側の面となるスリット面11aであるが、固定部材1がスリット面11a、11b両面に当接するように設けられてもよい。一般的にコンクリートの打ち込みは、耐震用スリット材10をはさんで柱側から行なわれるので、柱に近い側とは反対側の面となるスリット面11aに固定部材1が当接するようにしておけばコンクリートの打ち込みに耐震用スリット材10が外れる虞がない。ただし、耐震用スリット材10の両側から同時にコンクリートを打ち込む場合にはスリット面11bにも固定部材1が当接するように取り付けることが好ましい。
In FIG. 1, a concrete casting frame structure provided with an earthquake-resistant slit material 10 is a joint between a wall material of a concrete building and a column (column-side formwork and the like omitted from the drawing) connected to the wall material. An earthquake-resistant slit material 10 embedded in the vicinity so as to penetrate through the wall material is provided between the molds 15 and 15 which are erected in opposition to construct the joint portion. The slit material for earthquake resistance 10 is composed of a slit core material 11 made of a plate-like foam or the like composed of 15% to 100% by weight of a synthetic resin and 85% to 0% by weight of an inorganic powder such as calcium carbonate or talc, A pair of support members 20 that support both ends of the slit core 11 are provided. The support member 20 includes fitting portions 19 and 19 for attaching the side end portions of the slit core member 11 and an attachment portion attached to a fixing portion (joint portion) 17 of the support member 20 provided in the mold 15. The seismic slit member 10 has a steady bar 12 that penetrates the slit core 11 at least at one location, and the steady rest provided through the slit core 11. The reinforcing member 12 is provided with a fixing member 1 that abuts against the slit surface 11a of the slit core member 11 and fixes the steadying reinforcing member 12 and the earthquake-resistant slit member 10 between the opposing molds 15 and 15. A separating material 13 is provided, and a fixing tool 14 for fixing both of the anti-rest bars 12 and the separating material 13 is provided at a crossing portion of the steadying reinforcing bar 12 and the separating material 13 to constitute a concrete placing frame structure.
The surface of the slit core member that contacts the fixing member 1 is usually a slit surface 11a that is a surface opposite to the side close to the column (the column connected to the wall and the column side in the vicinity of the connection). The fixing member 1 may be provided so as to contact both the slit surfaces 11a and 11b. Generally, the concrete is driven from the column side with the earthquake-resistant slit material 10 interposed therebetween, so that the fixing member 1 should be in contact with the slit surface 11a which is the surface opposite to the side close to the column. For example, there is no possibility that the earthquake-resistant slit material 10 will come off when the concrete is driven. However, when concrete is driven simultaneously from both sides of the earthquake-resistant slit material 10, it is preferable that the fixing member 1 be attached so as to contact the slit surface 11b.

振れ止め鉄筋12とセパレート材13との交叉部で両者を固定する固定具14は、装着、固定が可能な形状であればいずれでも差し支えない。例えば、図6に示すような鋼鉄線の両端部が振れ止め鉄筋12とセパレート材13とを係止し固定し得る形状に湾曲させたクリップ状の係止部を有するものは、装着が容易であり、安価であるので好ましい。その他に上記交叉部に装着可能な、例えば逆U字形状(鞍状)の形状のものを使用してもよく、また上記のような固定具を使用せず針金で結束してもよい。尚、耐震スリット材が配置される部位においては、セパレート材13は、通常は柱に遠い側のみに設けられる(柱に近い側には設けられない)ので、振れ止め鉄筋12は柱に遠い側に設置されるセパレート材13に固定されることになる。   The fixing tool 14 that fixes both of the anti-rest bars 12 and the separating member 13 at the crossing portion may be any shape as long as it can be attached and fixed. For example, as shown in FIG. 6, a steel wire having a clip-shaped locking portion in which both ends of the steel wire are bent into a shape capable of locking and fixing the steadying reinforcing bar 12 and the separating material 13 is easy to mount. Yes, because it is inexpensive. In addition, for example, an inverted U-shaped (saddle-shaped) shape that can be attached to the crossing portion may be used, or may be bundled with a wire without using the above-described fixture. In the part where the seismic slit material is disposed, the separate material 13 is usually provided only on the side far from the column (not provided on the side close to the column), so the steady bar 12 is on the side far from the column. It will be fixed to the separate material 13 installed in the.

本発明におけるコンクリート打設用枠構造体の耐震用スリット材10のスリット芯材11の少なくとも一方の面11a、11bには所望に応じて補強層(図示しない)を設けてもよい。該補強層は、張力に抗してスリット芯材11の強度を高める効果を有する。補強層は、特に制限されないが、例えば、ポリエチレン等のフィルムを貼付して形成されるフィルム層や、耐水紙や、発泡体の表面付近における発泡倍率を低減して成形せしめた成形加工層を備えてもよい。   A reinforcing layer (not shown) may be provided on at least one surface 11a, 11b of the slit core member 11 of the seismic slit member 10 of the concrete placing frame structure according to the present invention as desired. The reinforcing layer has an effect of increasing the strength of the slit core member 11 against tension. The reinforcing layer is not particularly limited, but includes, for example, a film layer formed by attaching a film such as polyethylene, water-resistant paper, and a molded layer formed by reducing the expansion ratio in the vicinity of the surface of the foam. May be.

コンクリート建造物の壁材と該壁材に連なる柱との接合部付近に本発明におけるコンクリート打設用枠構造体を形成する場合の施工例の概要を、図5により説明する。
コンクリート打設用枠構造体120においては、通常、振れ止め鉄筋12が、壁内において壁の面方向に沿って平行に、かつ水平方向に複数本走り、耐震用スリット材10を貫通して配設された構造を備える。
従って、コンクリート打設用枠構造体120においては、振れ止め鉄筋12の少なくとも一つが、対向する型枠15、15との間隔を保持すべく差し渡されたセパレート材13に対して上方あるいは下方に近接して交叉状に配設され、その交叉部で固定具14によって相互に固定された構造を備える。固定部材1は、振れ止め鉄筋12をセパレート材13に固定する前に、振れ止め鉄筋12の一方の端部(図4では右側の端部)から、挿通部2を利用して所望の位置まで差し込まれ、最終的にはスリット面11aに接するように又はスリット面11aに近接するように差し込まれ、耐震用スリット材10が補強される。
コンクリート打設用枠構造体120において型枠15、15によって形成される空間部にコンクリートが打設されたとき、耐震用スリット材10がコンクリートによる側圧を受けて、コンクリート打設用枠構造体120における予定された設置位置から移動するようなことがなく、耐震用スリット材10によって壁と柱(柱側の型枠等は図から省略)が分断された構造を備える所定のコンクリートの壁構造が形成される。
An outline of a construction example in the case where the concrete placing frame structure according to the present invention is formed in the vicinity of a joint portion between a wall material of a concrete building and a column connected to the wall material will be described with reference to FIG.
In the concrete placing frame structure 120, the steady-state reinforcing bars 12 usually run in parallel in the wall surface direction in the wall and in the horizontal direction, and penetrate through the earthquake-resistant slit material 10. It is provided with a set structure.
Therefore, in the concrete placing frame structure 120, at least one of the steady-state reinforcing bars 12 is located above or below the separated material 13 that is passed so as to maintain a distance from the opposite molds 15 and 15. It has a structure in which they are arranged close to each other in a cross shape and fixed to each other by a fixing tool 14 at the cross portion. Before fixing the steady bar 12 to the separating material 13, the fixing member 1 can be used from one end (right end in FIG. 4) of the steady bar 12 to a desired position using the insertion part 2. The seismic slit material 10 is reinforced by being inserted so as to be in contact with the slit surface 11a or close to the slit surface 11a.
When concrete is placed in the space formed by the molds 15 and 15 in the concrete placing frame structure 120, the seismic slit material 10 receives a side pressure from the concrete, and the concrete placing frame structure 120. A predetermined concrete wall structure having a structure in which a wall and a column (the column-side formwork and the like are omitted from the drawing) are separated by the earthquake-resistant slit material 10 without moving from the planned installation position in FIG. It is formed.

次に、耐震用スリット材10におけるスリット芯材11と振れ止め鉄筋12との固定強度を測定するための試験装置を図8により概略を説明する。
試験装置は、万能試験機テンシロンを用い、本発明に係る固定部材を取り付けた異形棒鋼からなる振れ止め鉄筋をテンシロンロードセル上に垂直に立設する。
スリット芯材11は、固定部材1にスリット面11aを当接させて配置される。
スリット芯材11のスリット面11b上には、テンシロンクロスヘッドに取り付けた中央に直径10mmの鉄筋を挿入する孔を設けたスリット芯材11と同じ大きさの平板が置かれ、10mm/min.の速度の荷重をかけて押圧したとき固定部材が固定された状態に保つことができる最大荷重を固定強度として測定した。
Next, an outline of a test apparatus for measuring the fixing strength of the slit core material 11 and the steady bar 12 in the earthquake-resistant slit material 10 will be described with reference to FIG.
The test apparatus uses a universal testing machine, Tensilon, and vertically mounts a steady-state reinforcing bar made of deformed bar steel with a fixing member according to the present invention on a Tensilon load cell.
The slit core material 11 is disposed with the slit surface 11 a in contact with the fixing member 1.
On the slit surface 11b of the slit core member 11, a flat plate having the same size as the slit core member 11 provided with a hole for inserting a reinforcing bar having a diameter of 10 mm is placed at the center attached to the Tensilon cross head. The maximum load that can be maintained in a state where the fixing member is fixed when it is pressed while applying a load at a speed of 5 mm was measured as the fixing strength.

なお、上記試験において、振れ止め鉄筋は、口径10mmのもの(SD295A D10)を使用した。また、上記試験においては、スリット芯材は、産宝高分子株式会社より不燃性無機質系高発泡体「タルボセル」として販売されているものの内、厚みが25mm、見掛け密度が90g/Lのものに対し、その両面に耐水紙を接着したものから、厚みはそのままで縦200mm×横140mmに切り出したものを用いた。固定部材は、ABS樹脂の円形状成形品(固定部材A)、およびポリカーボネート樹脂の図2に示す円形状成形品(固定部材P)を利用した。これらのサイズは、いずれも、基台6の直径が50mm、基台6の厚みが3mm、各溝状空間部4の幅が3mm、各溝状空間部の外側端部から基台の最も近い外周までの距離が6mm、各位置固定部3の鉄筋に差し込む前の図4のαに相当する角度が35度、挿通部2の直径が9mm、各裏面の凹部26は断面が円弧状の溝状凹部であり、この溝状凹部の最も深いところにおける成形品の厚みが1.6mmであり、この溝状凹部の開口部の幅が4mmのものである。
なお、比較として、振れ止め鉄筋としてコブ付き振れ止め鉄筋(SD295A D10を加工してコブを形成した鉄筋)を使用し、固定部材1を使用しないで上記と同様の試験を行った。このとき、本発明の固定部材に代えて公知の固定部材(従来品U)を使用した。図7に従来品Uの正面図を示す。従来品Uは、基台部51の一方が開放された振れ止め鉄筋の挿通口50とを備えた形状のものであり、その厚みは2mmのものである。従来品Uは、コブ付き振れ止め鉄筋のコブ部による耐震用スリットの固定を補助するもので、本発明の固定部材1と形状が異なるものである。
試験結果を表1に示す。
In the above test, a steady-rebar having a diameter of 10 mm (SD295A D10) was used. In addition, in the above test, the slit core material is sold as non-combustible inorganic high foam “Talbocel” by Sanho Polymer Co., Ltd., and has a thickness of 25 mm and an apparent density of 90 g / L. On the other hand, what was cut out into a length of 200 mm and a width of 140 mm was used without changing the thickness from the one having waterproof paper adhered to both sides. As the fixing member, a circular molded product of ABS resin (fixing member A) and a circular molded product (fixing member P) of polycarbonate resin shown in FIG. 2 were used. In any of these sizes, the diameter of the base 6 is 50 mm, the thickness of the base 6 is 3 mm, the width of each groove-like space 4 is 3 mm, and the base is closest to the outer edge of each groove-like space. The distance to the outer periphery is 6 mm, the angle corresponding to α in FIG. 4 before being inserted into the reinforcing bar of each position fixing portion 3 is 35 degrees, the diameter of the insertion portion 2 is 9 mm, and the recess 26 on each back surface is a groove having an arc-shaped cross section The thickness of the molded product at the deepest portion of the groove-shaped recess is 1.6 mm, and the width of the opening of the groove-shaped recess is 4 mm.
For comparison, a steady rebar with a bump (reinforcing bar formed by processing SD295A D10) was used as a steady rest, and the same test as described above was performed without using the fixing member 1. At this time, a known fixing member (conventional product U) was used instead of the fixing member of the present invention. A front view of the conventional product U is shown in FIG. The conventional product U has a shape including a steady-reinforcing bar insertion opening 50 in which one of the base parts 51 is opened, and has a thickness of 2 mm. The conventional product U assists the fixing of the earthquake-resistant slit by the hump portion of the steady-rebar with a hump, and is different in shape from the fixing member 1 of the present invention.
The test results are shown in Table 1.

Figure 2007085169
Figure 2007085169

表1より、本発明に利用される固定部材は、通常の振れ止め鉄筋を使用しても、従来のコブ付き振れ止め鉄筋のコブ部に図7の固定部材を固定した際の固定強度よりも優れる上、固定強度の最大値と最小値との差が少ないことから固定強度のばらつきも小さく、非常に優秀な固定部材であることが分る。   From Table 1, the fixing member used in the present invention is more than the fixing strength when fixing the fixing member of FIG. In addition to being excellent, since the difference between the maximum value and the minimum value of the fixing strength is small, the variation in the fixing strength is small, indicating that the fixing member is an excellent fixing member.

本発明に利用される固定部材を用いて構成した耐震用スリット材を備えたコンクリート打設用枠構造体の一実施例を説明するための断面図を示す。Sectional drawing for demonstrating one Example of the frame structure for concrete placement provided with the earthquake-resistant slit material comprised using the fixing member utilized for this invention is shown. 本発明に利用される振れ止め鉄筋と耐震用スリット材とを固定する固定部材の一例を示す。図2(1)は上面図、図2(2)は下面図をそれぞれ示す。An example of the fixing member which fixes the steadying reinforcing bar utilized for this invention and the slit material for earthquake resistance is shown. 2A is a top view, and FIG. 2B is a bottom view. 前記固定部材の別の実施例の一例を示し、図3(1)は上面図、図3(2)は下面図をそれぞれ示す。An example of another embodiment of the fixing member is shown, FIG. 3 (1) is a top view, and FIG. 3 (2) is a bottom view. 本発明に利用される固定部材により振れ止め鉄筋と耐震用スリット材とを固定した状態を説明する部分拡大断面図である。It is a partial expanded sectional view explaining the state which fixed the steady reinforcement and the earthquake-resistant slit material by the fixing member utilized for this invention. コンクリート打設用枠構造体の施工例を説明するための斜視図である。It is a perspective view for demonstrating the construction example of the frame structure for concrete placement. 振れ止め鉄筋とセパレート材との交叉部を固定する固定具の一例を示す。An example of the fixture which fixes the crossing part of a steady reinforcement and a separate material is shown. 従来の固定部材の一例を示す。An example of the conventional fixing member is shown. 耐震用スリット材の固定強度の測定する試験装置を説明するための概略図である。It is the schematic for demonstrating the testing apparatus which measures the fixed strength of the slit material for earthquake resistance.

符号の説明Explanation of symbols

1 固定部材
2 挿通部
3 位置固定部
4 溝状空間部
6 基台
10 耐震用スリット材
11 スリット芯材
11a、11b スリット面
12 振れ止め鉄筋
13 セパレート材
14 固定具
15 型枠
17 装着部
18 固定部材
19 スリット嵌合部
20 スリット支持部材
21 溝状凹部
26 凹部
50 挿通孔
51 基台部
120 コンクリート打設用枠構造体
DESCRIPTION OF SYMBOLS 1 Fixing member 2 Insertion part 3 Position fixing part 4 Groove-like space part 6 Base 10 Slit-proof slit material 11 Slit core material 11a, 11b Slit surface 12 Stabilizing rebar 13 Separate material 14 Fixture 15 Mold 17 Mounting part 18 Fixing Member 19 Slit fitting portion 20 Slit support member 21 Groove-shaped concave portion 26 Recessed portion 50 Insertion hole 51 Base portion 120 Frame structure for placing concrete

Claims (2)

対向する型枠と、対向する型枠の間隔を保持すべく差し渡されたセパレート材と、耐震用スリット材と、耐震用スリット材のスリット面を貫通して配設される振れ止め鉄筋と、耐震用スリット材と振れ止め鉄筋とを固定する固定部材と、を備えるコンクリート打設用枠構造体において、該振れ止め鉄筋は溝状凹部を有する異形棒鋼からなり、該固定部材は、板状基台の任意の位置から放射線状に配置され相互に連通する複数の溝状空間部を有し、隣合う該溝状空間部間に相互に連通する部位に向かって突出する複数の舌片状の位置固定部を形成し、前記各溝状空間部と各舌片状の位置固定部とによって前記相互に連通する部位に挿通部が形成されてなる構造を有し、該挿通部には該振れ止め鉄筋が挿通されており、該位置固定部が該振れ止め鉄筋に沿って耐震用スリット材と反対側に突出して、該位置固定部の突出部分が該溝状凹部に係止しており、該固定部材は、該耐震用スリット材のスリット面に接するように又はスリット面に近接するように差し込まれ、該振れ止め鉄筋は、固定具によって該セパレート材に固定された構造を備えている、ことを特徴とするコンクリート打設用枠構造体。   An opposing mold, a separate material passed to maintain the spacing of the opposing mold, an anti-seismic slit material, and a steady bar that is disposed through the slit surface of the anti-seismic slit material, A concrete placement frame structure comprising a slit member for earthquake resistance and a fixing member for fixing the steady rest reinforcing bar, wherein the steady rest reinforcing bar is formed of a deformed steel bar having a groove-shaped recess, and the fixing member is a plate-like base. A plurality of groove-like spaces that are arranged radially from any position of the table and communicate with each other, and a plurality of tongue-like shapes projecting toward the mutually communicating portions between the adjacent groove-like spaces; A position fixing portion is formed, and an insertion portion is formed at the portion communicating with each other by the groove-shaped space portion and the tongue-like position fixing portion. Stop bars are inserted, and the position fixing part is the steady rest Projecting to the opposite side of the earthquake-resistant slit material along the line, the protruding portion of the position fixing portion is locked to the groove-shaped recess, and the fixing member is in contact with the slit surface of the earthquake-resistant slit material A concrete placement frame structure, characterized in that it is inserted so as to be close to the slit surface, and the steadying reinforcing bar has a structure fixed to the separate material by a fixture. 該振れ止め鉄筋と該固定部材における位置固定部の突出部分との接触部において、接触角度αが80〜10度であることを特徴とする請求項1に記載のコンクリート打設用枠構造体。   2. The concrete placing frame structure according to claim 1, wherein a contact angle α is 80 to 10 degrees at a contact portion between the steady bar and the protruding portion of the position fixing portion of the fixing member.
JP2006298576A 2006-11-02 2006-11-02 Frame structure for placing concrete Pending JP2007085169A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102155645B1 (en) * 2019-10-22 2020-09-14 조규대 Formwork for the PC Deck that can be placed at the Exact Position, the Manufacturing Method of the PC Deck using the same and the PC Deck
JP7499294B2 (en) 2022-06-22 2024-06-13 東急建設株式会社 Structural slit member and wall structure construction method
JP7504159B2 (en) 2022-06-22 2024-06-21 東急建設株式会社 Structural slit member and wall structure construction method

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102155645B1 (en) * 2019-10-22 2020-09-14 조규대 Formwork for the PC Deck that can be placed at the Exact Position, the Manufacturing Method of the PC Deck using the same and the PC Deck
JP7499294B2 (en) 2022-06-22 2024-06-13 東急建設株式会社 Structural slit member and wall structure construction method
JP7504159B2 (en) 2022-06-22 2024-06-21 東急建設株式会社 Structural slit member and wall structure construction method

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