JP6397751B2 - Construction method of rebar reinforcement assembly, rebar reinforcement, and cast-in-place pile - Google Patents

Construction method of rebar reinforcement assembly, rebar reinforcement, and cast-in-place pile Download PDF

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JP6397751B2
JP6397751B2 JP2014257305A JP2014257305A JP6397751B2 JP 6397751 B2 JP6397751 B2 JP 6397751B2 JP 2014257305 A JP2014257305 A JP 2014257305A JP 2014257305 A JP2014257305 A JP 2014257305A JP 6397751 B2 JP6397751 B2 JP 6397751B2
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渡辺　徹
徹 渡辺
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徹 渡辺
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Description

本発明は、鉄筋籠の上昇防止用組付体、鉄筋籠、及び場所打ち杭の施工法に関し、より詳細には、場所打ち杭により構造物の基礎を施工する工程において、鉄筋籠の共上りや浮上りを防止するため、前記鉄筋籠に組み付けられる鉄筋籠の上昇防止用組付体、鉄筋籠、及び場所打ち杭の施工法に関する。   The present invention relates to a method for constructing an assembly for preventing a rise of a reinforcing bar, a reinforcing bar, and a cast-in-place pile, and more specifically, in the process of constructing a foundation of a structure by a cast-in-place pile, The present invention relates to a method for constructing an assembling body for preventing the ascent of a reinforcing bar to be assembled to the reinforcing bar, a reinforcing bar, and a cast-in-place pile.

構造物の建設現場では、該構造物の耐震強度等を高めるため地盤に杭を打ち込み、前記構造物を支える杭基礎を形成する工法が一般に採用されている。前記杭基礎の施工法の一つに場所打ち杭による施工法がある。前記場所打ち杭とは、円筒状に組み立てた鉄筋籠を掘削した杭孔内に建て込み、該建て込み後にコンクリートを杭孔内に打ち込み、固めて形成したものである。   In the construction site of a structure, a construction method is generally adopted in which a pile is driven into the ground to form a pile foundation that supports the structure in order to increase the seismic strength of the structure. One of the pile foundation construction methods is a cast-in-place pile construction method. The cast-in-place pile is formed by placing a rebar rod assembled in a cylindrical shape in a drilled hole, and then driving the concrete into the pile hole and solidifying it.

前記場所打ち杭による施工法には、地面を掘削する方法等の違いにより、オールケーシング工法、アースドリル工法、リバース工法などのいくつかの工法がある。
オールケーシング工法は、次に述べる順序で施工される。まず、掘削機を地盤に水平に据付け、ケーシングチューブの中心と杭心とを合わせる。次に前記ケーシングチューブを掘削全長にわたって揺動（回転）させて押込みながらハンマグラブで前記ケーシングチューブ内の土砂を掘削し、支持層を確認後、根入れ掘削を行う。 There are several construction methods such as an all-casing construction method, an earth drill construction method, and a reverse construction method, depending on the method of excavating the ground and the like.
The all casing method is constructed in the following order. First, the excavator is installed horizontally on the ground, and the center of the casing tube and the pile core are aligned. Next, the casing tube is rocked (rotated) over the entire length of excavation, and the earth and sand in the casing tube is excavated with a hammer magnet while pushing, and after confirming the support layer, the excavation is performed.

前記ハンマグラブによる底ざらい完了後、沈殿バケットを孔底へ投入し沈殿待ちの後スライムと共に引き上げる。次に、地上で組み立てた鉄筋籠を孔内中央に鉛直に建て込む。その後、トレミー管を孔内に挿入し、前記トレミー管からコンクリートを流し込み、孔内にコンクリートを打ち込む。コンクリートを打ち込みながら前記ケーシングチューブ及び前記トレミー管を引き抜き回収する。その後、空掘り部分の埋め戻しを行い、作業を終える。   After completion of the bottom roughening by the hammaglab, the precipitation bucket is put into the bottom of the hole, and after waiting for the precipitation, it is pulled up together with the slime. Next, the reinforcing rods assembled on the ground are built vertically in the center of the hole. Thereafter, the treme tube is inserted into the hole, concrete is poured from the treme tube, and the concrete is driven into the hole. The casing tube and the tremy tube are pulled out and collected while pouring concrete. After that, the back dug portion is backfilled to finish the work.

前記オールケーシング工法では、鋼板製の前記ケーシングチューブで孔壁が保護されるため、該孔壁の崩壊や近接構造物に与える影響が少なく、掘削を比較的容易に行うこともでき、また、地下水への配慮などの環境保全対策にも有利であるというメリットがある。   In the all casing method, since the hole wall is protected by the casing tube made of steel plate, there is little influence on the collapse of the hole wall and adjacent structures, and excavation can be performed relatively easily. There is a merit that it is also advantageous for environmental conservation measures such as considerations.

しかしながら、前記ケーシングチューブの内壁面と前記鉄筋籠の外周面とは、所定のコンクリートかぶり厚が確保されるようになっているものの、前記ケーシングチューブや前記鉄筋籠の傾き、前記ケーシングチューブ内壁面の清掃不良（コンクリートや土砂の固着）、前記ケーシングチューブ内壁面の凹凸等の要因により、所定のコンクリートかぶり厚を確保するために前記鉄筋籠の外周面に取り付けられるスペーサ（金具）と前記ケーシングチューブとが接触する場合がある。   However, the inner wall surface of the casing tube and the outer peripheral surface of the reinforcing bar rod are designed to ensure a predetermined concrete cover thickness, but the inclination of the casing tube and the reinforcing rod rod, the inner wall surface of the casing tube Spacers (metal fittings) attached to the outer peripheral surface of the reinforcing bar to secure a predetermined concrete cover thickness due to poor cleaning (adherence of concrete or earth and sand), unevenness of the inner wall surface of the casing tube, and the casing tube May come into contact.

前記ケーシングチューブと前記鉄筋籠（前記スペーサ）とが接触した状態で、前記ケーシングチューブの引き抜きを行った場合、前記ケーシングチューブと共に前記鉄筋籠が持ち上がってくる共上り現象が生じることがある。   When the casing tube is pulled out in a state where the casing tube and the reinforcing bar rod (the spacer) are in contact with each other, there may be a co-up phenomenon in which the reinforcing bar rod is lifted together with the casing tube.

上記した鉄筋籠の共上り現象が止まらない場合には、前記鉄筋籠及びコンクリートを除去して再施工するか、隣接箇所に補強用の杭を築造するといった措置が必要となり、施工に手間や費用がかかるといった課題があった。   If the above-mentioned phenomenon of co-up of reinforcing bars does not stop, it is necessary to take measures such as removing the reinforcing bars and concrete and reconstructing them, or building reinforcing piles in adjacent locations. There was a problem that it took.

そこで、上記した鉄筋籠の共上り現象を防止するために、従来は、鉄筋籠の最下端部に鉄筋部材を井桁状に取り付ける方法が採用されていた。例えば、鉄筋籠の底面円周上のある２点（２本の主筋）を結ぶ長さ（弦の長さ）を有し、かつ両端部を略直角に折り曲げたコ字状鉄筋（コ字状棒状筋）を所定の本数準備し、組み立てた鉄筋籠の最下端部に前記コ字状鉄筋を井桁状に配置しながら各コ字状鉄筋の両端部を前記鉄筋籠の主筋に番線で結束し、また、これらコ字状鉄筋の交差部分を番線で結束して前記鉄筋籠に組み付けていた。   Therefore, in order to prevent the above-described phenomenon of re-coiling of the reinforcing bar rods, conventionally, a method of attaching a reinforcing bar member to the lowermost end portion of the reinforcing bar rods in a cross-beam shape has been adopted. For example, a U-shaped rebar that has a length (string length) that connects two points (two main bars) on the bottom circumference of the rebar rod, and is bent at both ends at a substantially right angle. A predetermined number of bar-shaped bars) are prepared, and the U-shaped reinforcing bars are arranged at the bottom end of the assembled reinforcing bar rod in a cross-girder shape, and both ends of each U-shaped reinforcing bar are tied to the main bar of the reinforcing bar rod with a wire. In addition, the crossing portions of the U-shaped reinforcing bars are bound together by a wire and assembled to the reinforcing bar rod.

また、図７は、下記の特許文献１に開示された井桁状鉄筋枠が取り付けられた鉄筋籠を示した図であり、（ａ）は孔内に建て込んだ鉄筋籠を示す縦断面図、（ｂ）は（ａ）におけるｂ−ｂ線断面図である。   Moreover, FIG. 7 is the figure which showed the reinforcing bar rod with which the cross-beam-shaped reinforcing bar frame disclosed by the following patent document 1 was attached, (a) is a longitudinal cross-sectional view which shows the reinforcing bar rod built in the hole, (B) is the bb sectional view taken on the line in (a).

鉄筋籠５０の浮上を防止するため、鉄筋籠５０を構成する主筋５１に交差させて取り付けられている最下端部のフープ筋５２に、長短１２本の鉄筋を井桁状に組み立てた井桁状鉄筋枠５３が溶接されている。また、鉄筋籠５０の外周面には、コンクリートのかぶり厚を確保・調整するためのスペーサ５４が所定の間隔で装着され、鉄筋籠５０の底部には、円環形状をした床版コンクリートブロック５５が連結されている。床版コンクリートブロック５５は坑底部５６に配設される。   In order to prevent the rebar rod 50 from rising, a cross-beam-shaped rebar frame in which twelve long and short rebars are assembled in a cross-girder shape at the hoop bar 52 at the lowermost end that is attached to intersect with the main bar 51 constituting the rebar rod 50. 53 is welded. In addition, spacers 54 for securing and adjusting the concrete cover thickness are mounted on the outer peripheral surface of the reinforcing bar 50 at predetermined intervals, and an annular floor slab concrete block 55 is provided at the bottom of the reinforcing bar 50. Are connected. The floor slab concrete block 55 is disposed in the bottom portion 56.

鉄筋籠５０の下端部に井桁状鉄筋枠５３を組み付けることにより、前記ケーシングチューブを引き抜く際に、前記コンクリートに埋まっている井桁状鉄筋枠５３が前記引き抜き方向に対する抵抗となり、鉄筋籠５０の共上り現象を防止することが可能となっている。   By assembling the cross-girder rebar frame 53 to the lower end of the rebar rod 50, when the casing tube is pulled out, the cross-girder rebar frame 53 embedded in the concrete becomes resistance to the pull-out direction, It is possible to prevent the phenomenon.

しかしながら、上記のように鉄筋籠５０の下端部に井桁状鉄筋枠５３を組み付ける方法では、鉄筋籠５０の底面円周上の２点を結ぶ長さ（弦の長さ）が、円周上の位置によって異なるため、取り付け位置に対応するように長さの異なる鉄筋部材を準備しなければならず、その製作に手間を要し、また、実際に組み立てられた鉄筋籠と、設計図面上の鉄筋籠とでは、主筋の位置や鉄筋籠の径の大きさに誤差が生じることが多く、事前に準備した前記鉄筋部材や井桁状鉄筋枠５３を所望の位置に組み付けることができない場合もあるという課題があった。   However, in the method of assembling the cross beam-shaped reinforcing bar frame 53 to the lower end portion of the reinforcing bar 50 as described above, the length (string length) connecting two points on the bottom circumference of the reinforcing bar 50 is on the circumference. Since it differs depending on the position, it is necessary to prepare rebar members with different lengths corresponding to the mounting position, and it takes time to manufacture them, and the actually assembled rebar rod and the rebar on the design drawing With the scissors, errors often occur in the position of the main bars and the diameter of the reinforcing bar scissors, and there is a case where the previously prepared reinforcing bar members and the cross-girder-shaped reinforcing bar frame 53 may not be assembled at desired positions. was there.

また、前記鉄筋籠への組み付け段階においては、前記コ字状鉄筋の両端部を鉄筋籠の主筋に番線で結束し、また、これらコ字状鉄筋の交差部分を番線でいちいち結束していたので、組み付け作業に手間を要し、また、結束状態が不十分であると番線が弛み、前記コ字状鉄筋が前記鉄筋籠から外れる虞があった。   In addition, at the stage of assembling the reinforcing bar rod, both ends of the U-shaped reinforcing bar were bound to the main reinforcing bar rod with a number wire, and the intersections of these U-shaped reinforcing bars were bound to each other with a number line. The assembly work requires labor, and if the binding state is insufficient, the wire is loosened, and the U-shaped reinforcing bars may come off from the reinforcing bar rods.

また、特許文献１記載の方法では、井桁状鉄筋枠５３を鉄筋籠５０のフープ筋５２に溶接により接合するので、溶接作業者でなければ作業ができず、鉄筋籠５０に簡単に組み付けることができないという課題があった。また、鉄筋籠５０への溶接作業は、母材となる鉄筋の性質（強度等）を損ねるため禁止されつつあり、採用されにくいという課題があった。   Further, in the method described in Patent Document 1, since the cross-girder-shaped reinforcing bar frame 53 is joined to the hoop bar 52 of the reinforcing bar 50 by welding, the work can be performed only by a welding operator and can be easily assembled to the reinforcing bar 50. There was a problem that it was not possible. Further, the welding work to the reinforcing bar 50 is being prohibited because it impairs the properties (strength and the like) of the reinforcing bar as a base material, and there is a problem that it is difficult to employ.

実用新案登録第３１６０４８５号公報Utility Model Registration No. 3160485

課題を解決するための手段及びその効果Means for solving the problems and their effects

本発明は上記課題に鑑みなされたものであって、鉄筋籠に簡単かつ迅速に作業性よく組み付けることができ、かつ杭基礎を施工する際における鉄筋籠の共上りや浮上りを防止することができる鉄筋籠の上昇防止用組付体、鉄筋籠、及び場所打ち杭の施工法を提供することを目的としている。   The present invention has been made in view of the above-described problem, and can be easily and quickly assembled to a reinforcing bar with good workability, and prevents the reinforcing bar from rising or rising when constructing a pile foundation. The purpose of the present invention is to provide a method for constructing an assembly for preventing the rise of reinforcing steel rods, reinforcing rods and cast-in-place piles.

上記目的を達成するために本発明に係る鉄筋籠の上昇防止用組付体（１）は、場所打ち杭の施工時に、杭孔内に建て込んだ鉄筋籠の上昇を防止するため、前記鉄筋籠の下端部に組み付ける鉄筋籠の上昇防止用組付体であって、前記鉄筋籠の下端中央部から放射状に配置される複数の上昇防止筋と、前記鉄筋籠の下端中央部で前記複数の上昇防止筋の一端部を支持する支持部材と、前記複数の上昇防止筋の他端部を前記鉄筋籠に固定する固定用金具とを備え、
前記支持部材が、上下一対の環状部と、前記上昇防止筋の一端部を支持可能な隙間を設けて前記上下一対の環状部を連結する連結部とを備え、
該連結部が、前記環状部の周上の複数箇所に形成されていることを特徴としている。
また、本発明に係る鉄筋籠の上昇防止用組付体（２）は、場所打ち杭の施工時に、杭孔内に建て込んだ鉄筋籠の上昇を防止するため、前記鉄筋籠の下端部に組み付ける鉄筋籠の上昇防止用組付体であって、前記鉄筋籠の下端中央部から放射状に配置される複数の上昇防止筋と、前記鉄筋籠の下端中央部で前記複数の上昇防止筋の一端部を支持する支持部材と、前記複数の上昇防止筋の他端部を前記鉄筋籠に固定する固定用金具とを備え、
前記支持部材が、上下一対の板状部と、前記上昇防止筋の一端部を支持可能な隙間を設けて前記上下一対の板状部を連結する連結部とを備え、
該連結部が、前記板状部の中央部に形成されている、又は前記板状部の周上の複数箇所に形成されていることを特徴としている。 In order to achieve the above-mentioned object, the assembly (1) for preventing the rise of the reinforcing bar according to the present invention has the above-mentioned reinforcing bar in order to prevent the rise of the reinforcing bar built in the pile hole when the cast-in-place pile is constructed. An assembly for preventing ascent of the reinforcing bar rod to be assembled to the lower end portion of the rod, and a plurality of rising preventing bars arranged radially from the lower end central portion of the reinforcing bar rod, A support member that supports one end of the anti-raising bar, and a fixing bracket that fixes the other end of the plurality of anti-raising bars to the reinforcing bar .
The support member includes a pair of upper and lower annular portions and a connecting portion that connects the pair of upper and lower annular portions by providing a gap capable of supporting one end of the rising prevention muscle,
The connecting portion is formed at a plurality of locations on the circumference of the annular portion .
Moreover, the assembly (2) for preventing the rise of the reinforcing bar according to the present invention is provided at the lower end of the reinforcing bar to prevent the reinforcing bar built up in the pile hole when the cast-in-place pile is constructed. An assembly for preventing ascent of the reinforcing bar rod to be assembled, and a plurality of anti-raising bars arranged radially from the lower end central portion of the reinforcing bar rod, and one end of the plurality of anti-raising bars at the lower end central portion of the reinforcing bar rod A support member for supporting the part, and a fixing bracket for fixing the other end of the plurality of rise prevention bars to the reinforcing bar rod,
The support member includes a pair of upper and lower plate-like portions, and a connecting portion that connects the pair of upper and lower plate-like portions by providing a gap capable of supporting one end of the rising prevention muscle,
The connecting portion is formed at a central portion of the plate-like portion, or is formed at a plurality of locations on the circumference of the plate-like portion.

上記鉄筋籠の上昇防止用組付体（１）によれば、前記鉄筋籠の下端中央部に前記支持部材を配置するとともに、前記鉄筋籠の下端中央部から放射状に配置した前記複数の上昇防止筋の一端部を前記支持部材に支持させ、前記複数の上昇防止筋の他端部を前記固定用金具で前記鉄筋籠に固定することで、従来の井桁状組付体のように鉄筋部材の交差部や鉄筋籠との連結部を番線結束や溶接を行うことなく、前記鉄筋籠の下端部に簡単かつ迅速に組み付けることができ、かつ杭基礎を施工する際における鉄筋籠の共上りや浮上りを確実に防止することが可能となる。
また、上記鉄筋籠の上昇防止用組付体（１）によれば、前記上下一対の環状部と前記連結部とにより形成される前記隙間に、前記上昇防止筋の一端部を挿し込んだ状態で前記上昇防止筋の一端部を支持することができ、従来の井桁状組立体のように鉄筋部材の交差部をいちいち番線等で結束する手間が必要なく、組み付け作業を簡単かつ迅速に行うことができる。また、前記上下一対の環状部の前記隙間に対する前記上昇防止筋の一端部の挿し込み量を調整できるため、組み立て後の鉄筋籠のサイズに誤差が生じている場合や、直径サイズが一定の範囲で異なる鉄筋籠であっても一種類（同一長さ）の前記上昇防止筋で対応することができ、一定の汎用性を持たせることが可能となり利便性を高めることができる。
上記鉄筋籠の上昇防止用組付体（２）によれば、前記上下一対の板状部と前記連結部とにより形成される前記隙間に、前記上昇防止筋の一端部を挿し込んだ状態で前記上昇防止筋の一端部を支持することができ、従来の井桁状組付体のように鉄筋部材の交差部をいちいち番線等で結束する手間が必要なく、組み付け作業を簡単かつ迅速に行うことができる。また、前記上下一対の板状部の前記隙間に対する前記上昇防止筋の一端部の挿し込み量を調整できるため、組み立て後の鉄筋籠のサイズに誤差が生じている場合や、直径サイズが一定の範囲で異なる鉄筋籠であっても一種類（同一長さ）の前記上昇防止筋で対応することができ、一定の汎用性を持たせることが可能となり利便性を高めることができる。 According to the assembly (1) for preventing the reinforcing bar rod from rising, the plurality of rising prevention members are arranged at the lower end central portion of the reinforcing rod rod and radially arranged from the lower end central portion of the reinforcing rod rod. One end of a bar is supported by the support member, and the other end of the plurality of rising prevention bars is fixed to the reinforcing bar rod by the fixing bracket, so that the reinforcing bar member can be It is possible to easily and quickly assemble the connecting part of the crossing and the reinforcing bar to the lower end of the reinforcing bar without tie or welding the wire, and to raise and float the reinforcing bar when constructing the pile foundation Can be reliably prevented.
Further, according to the assembly (1) for preventing the reinforcing bar rod from rising, a state in which one end portion of the rising prevention rod is inserted into the gap formed by the pair of upper and lower annular portions and the connecting portion. It is possible to support one end of the anti-raising bar, and it is not necessary to bind the crossing parts of the reinforcing bar members with a wire or the like as in the conventional cross-girder assembly, and the assembly work can be performed easily and quickly. Can do. In addition, since the insertion amount of the one end portion of the rising prevention bar with respect to the gap between the pair of upper and lower annular portions can be adjusted, there is an error in the size of the reinforcing bar rod after assembly, or the diameter size is in a certain range. Even different reinforcing bar rods can be handled with one type (same length) of the above-mentioned anti-raising bars, and can have a certain versatility, thereby improving convenience.
According to the assembly (2) for preventing the rise of the reinforcing bar rod, in a state where one end of the rise prevention bar is inserted into the gap formed by the pair of upper and lower plate-like portions and the connecting portion. It can support one end of the anti-raising bar, and does not require the trouble of binding the crossing parts of the reinforcing bar members with a wire or the like unlike the conventional cross-girder assembly, so that the assembly work can be performed easily and quickly. Can do. Moreover, since the insertion amount of the one end part of the rising prevention bar with respect to the gap between the pair of upper and lower plate-like parts can be adjusted, there is an error in the size of the reinforcing bar rod after assembly, or the diameter size is constant. Reinforcing bar rods that differ in range can be handled by one type (same length) of the above-described anti-raising bars, and can have a certain level of versatility, thereby improving convenience.

また、本発明に係る鉄筋籠の上昇防止用組付体（３）は、上記鉄筋籠の上昇防止用組付体（１）又は（２）において、前記複数の上昇防止筋が、前記鉄筋籠の半径よりも短い長さで、かつ前記他端部が折り曲げて形成されたＬ型棒状筋で構成され、前記固定用金具が、前記鉄筋籠の下端部に配設された補強リングに前記上昇防止筋を固定可能な金具で構成されていることを特徴としている。 Further, the assembly for preventing the rise of reinforcing bar rods ( 3 ) according to the present invention is the assembly for preventing the reinforcement of reinforcing rods (1) or (2) , wherein the plurality of rise preventing rods are the reinforcing bar rods. The fixing bracket is formed by an L-shaped bar having a length shorter than the radius of the bar and the other end is bent, and the fixing bracket is raised to the reinforcing ring disposed at the lower end of the reinforcing bar. It is characterized by being composed of metal fittings that can fix the prevention bars.

上記鉄筋籠の上昇防止用組付体（３）によれば、前記Ｌ型棒状筋の他端部の折曲部を前記補強リングに前記固定用金具を用いて簡単かつ迅速に固定することができる。また、前記鉄筋籠の半径よりも短い、同じ長さの前記複数の上昇防止筋を準備すればよいため、従来の井桁状組付体のように、１つの鉄筋籠に対して異なる長さの（弦の長さの違いに応じた）鉄筋部材を製作する必要のない組付体とすることができる。 According to the assembly ( 3 ) for preventing the reinforcing bar from rising, the bent portion of the other end of the L-shaped bar can be easily and quickly fixed to the reinforcing ring using the fixing bracket. it can. In addition, since it is only necessary to prepare the plurality of rising prevention bars having the same length, which is shorter than the radius of the reinforcing bar rods, the lengths of the reinforcing bar rods are different from each other, as in the conventional cross beam assembly. It can be set as the assembly which does not need to manufacture a reinforcing bar member (according to the difference in the length of a string).

また、参考例に係る鉄筋籠の上昇防止用組付体（４）は、場所打ち杭の施工時に、杭孔内に建て込んだ鉄筋籠の上昇を防止するため、前記鉄筋籠の下端部に組み付ける鉄筋籠の上昇防止用組付体であって、前記鉄筋籠の下端中央部から放射状に配置される複数の上昇防止筋と、前記鉄筋籠の下端中央部で前記複数の上昇防止筋の一端部を支持する支持部材と、前記複数の上昇防止筋の他端部を前記鉄筋籠に固定する固定用金具とを備え、前記支持部材が、前記複数の上昇防止筋を挿通させる孔が側面に所定間隔を設けて形成された環状部材で構成されていることを特徴としている。 In addition, the assembly for preventing the reinforcement of reinforcing bars ( 4 ) according to the reference example is provided at the lower end of the reinforcing bar to prevent the reinforcement of the reinforcing bars built in the pile hole during the construction of the cast- in- place pile. An assembly for preventing ascent of the reinforcing bar rod to be assembled, and a plurality of anti-raising bars arranged radially from the lower end central portion of the reinforcing bar rod, and one end of the plurality of anti-raising bars at the lower end central portion of the reinforcing bar rod A support member for supporting the portion, and a fixing bracket for fixing the other end portion of the plurality of rise prevention bars to the reinforcing bar rod, and the support member has a hole on the side surface through which the plurality of rise prevention bars are inserted. It is characterized by comprising an annular member formed with a predetermined interval.

上記鉄筋籠の上昇防止用組付体（４）によれば、前記環状部材の側面に形成された挿通孔に、前記上昇防止筋の一端部を挿し込んだ状態で前記上昇防止筋の一端部を支持することができ、従来の井桁状組付体のように鉄筋部材の交差部をいちいち番線等で結束する手間が必要なく、組み付け作業を簡単かつ迅速に行うことができる。また、前記環状部材の前記挿通孔に対して、前記上昇防止筋の一端部の挿し込み量を調整できるため、組み立て後の鉄筋籠のサイズに誤差が生じている場合や、直径サイズが一定の範囲で異なる鉄筋籠であっても一種類（同一長さ）の前記上昇防止筋で対応することができ、一定の汎用性を持たせることが可能となり利便性を高めることができる。 According to the assembly ( 4 ) for preventing the rise of the reinforcing bar rod, one end of the rise prevention muscle in a state in which one end of the rise prevention muscle is inserted into the insertion hole formed in the side surface of the annular member. Thus, there is no need to bind the intersecting portions of the reinforcing bar members with a number wire or the like unlike the conventional cross-girder assembly, and the assembly work can be performed easily and quickly. In addition, since the insertion amount of the one end portion of the rising prevention bar can be adjusted with respect to the insertion hole of the annular member, there is an error in the size of the reinforcing bar rod after assembly, or the diameter size is constant. Reinforcing bar rods that differ in range can be handled by one type (same length) of the above-described anti-raising bars, and can have a certain level of versatility, thereby improving convenience.

また、本発明に係る鉄筋籠（１）は、上記鉄筋籠の上昇防止用組付体（１）〜（３）のいずれかが当該鉄筋籠の下端部に取り付けられていることを特徴としている。 Moreover, the reinforcing bar rod (1) according to the present invention is characterized in that any one of the above-mentioned assembling bodies (1) to ( 3 ) for preventing the reinforcing bar rod from rising is attached to the lower end portion of the reinforcing bar rod. .

上記鉄筋籠（１）によれば、従来の井桁状組付体のように鉄筋部材の交差部や鉄筋籠との連結部を番線での結束や溶接作業を行うことなく、上記鉄筋籠の上昇防止用組付体を前記鉄筋籠の下端部に簡単かつ迅速に組み付けることができ、前記鉄筋籠の組み立て作業の効率化を図ることができ、かつ杭基礎を施工する際における鉄筋籠の共上りや浮上りを確実に防止することが可能となる。 According to the reinforcing bar rod (1) , as in the conventional cross-girder assembly, the reinforcing bar rod is raised without binding or welding work at the intersection of the reinforcing bar member or the connecting portion with the reinforcing bar rod. It is possible to easily and quickly assemble the assembly for prevention to the lower end of the reinforcing bar rod, to improve the efficiency of the assembling work of the reinforcing rod rod, and to reinforce the reinforcing rod rod when constructing the pile foundation It is possible to reliably prevent or lift.

また、本発明に係る場所打ち杭の施工法は、ケーシングチューブを地盤に圧入しながら杭孔を形成するオールケーシング工法で場所打ち杭を施工するに際し、上記鉄筋籠（１）を前記杭孔内に建て込む工程と、前記杭孔内にコンクリートを打ち込む工程と、該コンクリートの打ち込みと共に前記ケーシングチューブを引き抜き回収する工程とを含むことを特徴としている。   Moreover, the construction method of the cast-in-place pile according to the present invention is as follows. When the cast-in-place pile is constructed by the all-casing method in which the pile hole is formed while the casing tube is press-fitted into the ground, the reinforcing bar (1) is placed in the pile hole. It includes a step of building, a step of driving concrete into the pile hole, and a step of drawing and collecting the casing tube together with the driving of the concrete.

上記場所打ち杭の施工法によれば、前記鉄筋籠の組み立て作業の効率化を図ることにより前記場所打ち杭の施工をスムーズに行うことができ、かつ杭基礎を施工する際における鉄筋籠の共上りや浮上りを確実に防止することができる。   According to the above-mentioned cast-in-place pile construction method, the cast-in-place pile can be smoothly constructed by improving the efficiency of the assembling work of the rebar rod, and the rebar rod is shared when constructing the pile foundation. It is possible to reliably prevent ascending and rising.

本発明の実施の形態（１）に係る鉄筋籠の上昇防止用組付体を鉄筋籠に組み付けた状態を示した概略図であり、（ａ）は鉄筋籠の底面図、（ｂ）は（ａ）におけるｂ−ｂ線端面図である。BRIEF DESCRIPTION OF THE DRAWINGS It is the schematic which showed the state which assembled | attached the reinforcing bar clerk assembly | attachment body for reinforcing bar reinforcement which concerns on embodiment (1) of this invention, (a) is the bottom view of a reinforcing bar casket, (b) is ( It is a bb line end view in a). 別の実施の形態に係る鉄筋籠の上昇防止用組付体を構成する支持部材の形態を説明するための図であり、（ａ）は底面図、（ｂ）は（ａ）におけるｂ−ｂ断面図である。It is a figure for demonstrating the form of the supporting member which comprises the assembly | attachment body for prevention of a reinforcement of the reinforcing bar according to another embodiment, (a) is a bottom view, (b) is bb in (a). It is sectional drawing. さらに別の実施の形態に係る鉄筋籠の上昇防止用組付体を構成する支持部材の形態を説明するための図であり、（ａ）は底面図、（ｂ）は（ａ）におけるｂ−ｂ線断面図である。It is a figure for demonstrating the form of the supporting member which comprises the assembly | attachment body for the reinforcement prevention of a reinforcing bar clerk which concerns on another embodiment, (a) is a bottom view, (b) is b- in (a). It is b line sectional drawing. 実施の形態（２）に係る鉄筋籠の上昇防止用組付体を鉄筋籠に組み付けた状態を示した概略図であり、（ａ）は鉄筋籠の底面図、（ｂ）は（ａ）におけるｂ−ｂ線端面図である。It is the schematic which showed the state which assembled | attached to the reinforcing bar rod the assembly for reinforcement prevention of the reinforcing rod according to the embodiment (2), (a) is a bottom view of the reinforcing bar rod, and (b) is in (a). It is a bb line end view. 別の実施の形態に係る鉄筋籠の上昇防止用組付体を構成する支持部材の形態を説明するための図であり、（ａ）は底面図、（ｂ）は（ａ）におけるｂ−ｂ線断面図である。It is a figure for demonstrating the form of the supporting member which comprises the assembly | attachment body for prevention of a reinforcement of the reinforcing bar according to another embodiment, (a) is a bottom view, (b) is bb in (a). It is line sectional drawing. 実施の形態（３）に係るに係る鉄筋籠の上昇防止用組付体を鉄筋籠に組み付けた状態を示した概略図であり、（ａ）は鉄筋籠の底面図、（ｂ）は（ａ）におけるｂ−ｂ線端面図である。It is the schematic which showed the state which assembled | attached the reinforcing bar clerk assembly which concerns on embodiment (3) to the reinforcing bar casket, (a) is a bottom view of a reinforcing bar casket, (b) is (a) It is a bb line end view in FIG. 従来の井桁状鉄筋枠が取り付けられた鉄筋籠を示した図であり、（ａ）は孔内に建て込んだ鉄筋籠を示す縦断面図、（ｂ）は（ａ）におけるｂ−ｂ線断面図である。It is the figure which showed the rebar rod to which the conventional cross-girder-shaped rebar frame was attached, (a) is a longitudinal cross-sectional view which shows the rebar rod built in the hole, (b) is the bb line cross section in (a) FIG.

以下、本発明に係る鉄筋籠の上昇防止用組付体、鉄筋籠、及び場所打ち杭の施工法の実施の形態を図面に基づいて説明する。図１は、実施の形態（１）に係る鉄筋籠の上昇防止用組付体を鉄筋籠に組み付けた状態を示した概略図であり、（ａ）は鉄筋籠の底面図、（ｂ）は（ａ）におけるｂ−ｂ線端面図である。   DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments of a method for constructing an assembly for preventing ascent of a reinforcing bar, a reinforcing bar, and a cast-in-place pile according to the present invention will be described with reference to the drawings. FIG. 1 is a schematic view showing a state in which the assembly for preventing the reinforcement of the reinforcing bar 1 according to the embodiment (1) is assembled to the reinforcing bar, (a) is a bottom view of the reinforcing bar, and (b) It is a bb line end view in (a).

鉄筋籠１は、円周上の中心軸方向に配列された多数の主筋（棒状筋）２と、これら主筋２の内側に直交する態様で配設され、その交差部で主筋２と固定された複数の（一定間隔で配置された）補強リング（環状帯状筋）３と、これら主筋２の外側にほぼ直交する態様で巻き付けられた多数のフープ筋（図示せず）とを含んで構成されている。これら主筋２と補強リング３との交差部は、図示しない接続固定金具より固定され、主筋２と前記フープ筋との交差部は、図示しないクリップ金具や番線結束等により固定されている。なお、図１に示した補強リング３は、鉄筋籠１の最下端部に設けられたものである。   The reinforcing bar 1 is arranged in a manner orthogonal to the inside of the main bars 2 and arranged in a manner orthogonal to the inner side of the main bars 2 and fixed to the main bars 2 at the intersections. A plurality of reinforcing rings (annular strips) 3 (arranged at regular intervals) and a large number of hoops (not shown) wound in a manner substantially perpendicular to the outside of the main bars 2 are configured. Yes. The intersection between the main reinforcement 2 and the reinforcing ring 3 is fixed by a connection fixing fitting (not shown), and the intersection between the main reinforcement 2 and the hoop reinforcement is fixed by a clip fitting, a wire bundle or the like (not shown). The reinforcing ring 3 shown in FIG. 1 is provided at the lowermost end of the reinforcing bar 1.

このような鉄筋籠１は、直径が０．６ｍ〜３ｍ程度、長さが１籠当たり１２ｍに及ぶものもあり、また主筋２の直径は約１９〜５１ｍｍ程度あり、これら各部材には鉄筋籠１のサイズや必要強度等の設計条件に応じて最適なものが採用される。   Such a rebar rod 1 has a diameter of about 0.6 m to 3 m and a length of about 12 m per rod, and the main rebar 2 has a diameter of about 19 to 51 mm. The optimum one is adopted according to the design conditions such as the size of 1 and the required strength.

鉄筋籠の上昇防止用組付体（以下、上昇防止用組付体と記す。）１０は、場所打ち杭の施工時に、例えば、オールケーシング工法において、コンクリートの打ち込みとともにケーシングチューブを引き抜き回収する時に、杭孔内に建て込んだ鉄筋籠の共上り現象（上昇）を防止するため、鉄筋籠１の下端部に組み付けられるものである。   Reinforcement rod assembling prevention assembly (hereinafter referred to as ascending prevention assembling assembly) 10 is, for example, in the construction of cast-in-place pile, for example, in the all casing construction method, when the concrete tube is driven and the casing tube is pulled out and collected, In order to prevent the co-up phenomenon (increase) of the reinforcing bar rod built in the pile hole, it is assembled to the lower end portion of the reinforcing bar rod 1.

上昇防止用組付体１０は、鉄筋籠１の下端中央部から外周方向に放射状に配置される複数の上昇防止筋１１と、鉄筋籠１の下端中央部で複数の上昇防止筋１１の一端部を支持する支持部材２０と、複数の上昇防止筋１１の他端部を鉄筋籠に固定する複数の固定用金具３０とを含んで構成されている。   The assembling body 10 for ascent prevention includes a plurality of anti-raising bars 11 arranged radially from the lower end central part of the reinforcing bar 1 and one end of the plural anti-raising bars 11 at the lower end central part of the reinforcing bar 1. And a plurality of fixing brackets 30 for fixing the other end portions of the plurality of rising prevention bars 11 to the reinforcing bar rods.

上昇防止筋１１は、鉄筋籠１の半径よりも短い長さで、かつ他端部が直角に折り曲げられた折曲部１２を有するＬ型棒状筋（ネジ鉄筋等）で構成されている。上昇防止筋１１の直径は、特に限定されないが、組み付け作業性、強度及び鉄筋籠１の上昇防止効果を確保する観点から１９ｍｍ〜２５ｍｍ程度のものを採用することが好ましい。上昇防止筋１１の長さは、適用する鉄筋籠１の半径よりも短く、かつ支持部材２０の隙間２４に一端部を挿し込んだ際に、挿し込み部分の長さが５０ｍｍ以上確保できる長さに設定されている。   The rise prevention bar 11 is configured by an L-shaped bar-like bar (screw bar, etc.) having a bent portion 12 having a length shorter than the radius of the reinforcing bar 1 and the other end bent at a right angle. The diameter of the rise prevention bar 11 is not particularly limited, but a diameter of about 19 mm to 25 mm is preferably employed from the viewpoint of assembling workability, strength, and the effect of preventing the rise of the reinforcing bar 1. The length of the ascending prevention bar 11 is shorter than the radius of the reinforcing bar 1 to be applied, and when the one end part is inserted into the gap 24 of the support member 20, the length of the insertion part can be ensured to be 50 mm or more. Is set to

また、一つの鉄筋籠に使用する上昇防止筋１１の本数は、鉄筋籠１のサイズ（直径や長さ）に応じて適宜選択され得るが、鉄筋籠１の上昇防止効果を確保する観点から、好ましくは８本以上、より好ましくは１６本以上使用することが好ましい。また、前記ケーシングチューブの引き抜きの際に、鉄筋籠底面に均等に抵抗がかかるように、これら上昇防止筋１１は円周上に等間隔で配置することが好ましい。上昇防止筋１１は、折曲部１２を補強リング３の外周面に当接させた状態で、固定用金具３０を用いて補強リング３に固定される。   Moreover, although the number of the raising prevention rod 11 used for one reinforcing bar rod can be suitably selected according to the size (diameter and length) of the reinforcing rod 1, from the viewpoint of securing the raising prevention effect of the reinforcing rod 1. It is preferable to use 8 or more, more preferably 16 or more. Moreover, it is preferable to arrange | position these raising prevention bars 11 on a circumference at equal intervals so that resistance may be applied equally to the bottom face of a reinforcing bar when the casing tube is pulled out. The rise prevention muscle 11 is fixed to the reinforcing ring 3 using the fixing bracket 30 in a state where the bent portion 12 is in contact with the outer peripheral surface of the reinforcing ring 3.

支持部材２０は、上下一対の環状部２１、２２と、上昇防止筋１１の一端部を支持可能な隙間２４を設けて上下一対の環状部２１、２２を連結する連結部２３とを備え、連結部２３が環状部２１、２２の周上の４箇所（略９０度間隔）に形成されている。   The support member 20 includes a pair of upper and lower annular portions 21 and 22 and a connecting portion 23 that connects the pair of upper and lower annular portions 21 and 22 by providing a gap 24 that can support one end portion of the ascent prevention muscle 11. The portions 23 are formed at four locations (approximately 90 ° intervals) on the circumference of the annular portions 21 and 22.

上下一対の環状部２１、２２は、縦断面が縦方向に長い帯状鋼板（縦幅５０ｍｍ〜７５ｍｍ、厚さ４．５ｍｍ〜１２ｍｍ程度）でそれぞれ構成されている。連結部２３は、環状部２１、２２の周上の４箇所に形成され、環状部２１、２２に溶接等により接合され、環状部２１、２２と略同じ厚みの鋼材等で構成されている。   The pair of upper and lower annular portions 21 and 22 are respectively composed of strip-shaped steel plates (longitudinal widths of 50 mm to 75 mm and thicknesses of about 4.5 mm to 12 mm) whose longitudinal sections are long in the longitudinal direction. The connecting portion 23 is formed at four locations on the circumference of the annular portions 21 and 22, joined to the annular portions 21 and 22 by welding or the like, and is configured by a steel material or the like having substantially the same thickness as the annular portions 21 and 22.

環状部２１、２２の直径は鉄筋籠１の直径に応じて設定される。例えば、鉄筋籠１の直径が１０００ｍｍ〜１５００ｍｍの場合は、直径が約４００ｍｍ〜６００ｍｍの環状部２１、２２が適用され、鉄筋籠１の直径が１６００ｍｍ〜２０００ｍｍの場合は、直径が約５００ｍｍ〜８００ｍｍの環状部２１、２２が適用され、また、鉄筋籠１の直径が２５００ｍｍ〜３０００ｍｍの場合は、直径が１２００ｍｍ〜１５００ｍｍの環状部２１、２２が適用され得る。環状部２１、２２の直径は、鉄筋籠１の半径よりも小さくなるように設定することが好ましい。   The diameters of the annular portions 21 and 22 are set according to the diameter of the reinforcing bar 1. For example, when the diameter of the reinforcing bar 1 is 1000 mm to 1500 mm, the annular portions 21 and 22 having a diameter of about 400 mm to 600 mm are applied. When the diameter of the reinforcing bar 1 is 1600 mm to 2000 mm, the diameter is about 500 mm to 800 mm. In the case where the diameter of the reinforcing bar 1 is 2500 mm to 3000 mm, the annular parts 21 and 22 having a diameter of 1200 mm to 1500 mm can be applied. The diameters of the annular portions 21 and 22 are preferably set to be smaller than the radius of the reinforcing bar 1.

連結部２３により形成される上下一対の環状部２１、２２の隙間は、上昇防止筋１１の一端部を支持可能な大きさ（上昇防止筋１１の直径よりも大きい幅）であれば特に限定されないが、隙間に挿入された上昇防止筋１１のぐらつき等を防止する観点から上昇防止筋１１の直径と同じサイズ、または少し大きなサイズに設定することが好ましい。   The gap between the pair of upper and lower annular portions 21 and 22 formed by the connecting portion 23 is not particularly limited as long as it is large enough to support one end portion of the ascent prevention muscle 11 (a width larger than the diameter of the ascent prevention muscle 11). However, it is preferable to set the same size as the diameter of the ascent prevention muscle 11 or a slightly larger size from the viewpoint of preventing the ascent of the ascent prevention muscle 11 inserted in the gap.

また、連結部２３の形成箇所は、上記した４箇所に限定されるものではなく、上下一対の環状部２１、２２の大きさ（直径）に応じて増やすことも可能であり、連結部２３の横幅や設置位置は、上昇防止筋１１の隙間への挿入に妨げにならない幅や位置に設定される。また、連結部２３は、上昇防止筋１１の一端部を挿入可能な一対の連結片で構成されているが、この形態に限定されるものではない。   Moreover, the formation location of the connection part 23 is not limited to the above-mentioned 4 places, It can also increase according to the magnitude | size (diameter) of a pair of upper and lower annular parts 21 and 22, The lateral width and the installation position are set to a width and position that do not hinder insertion of the ascent prevention muscle 11 into the gap. Moreover, although the connection part 23 is comprised with a pair of connection piece which can insert the one end part of the raising prevention muscle 11, it is not limited to this form.

固定用金具３０は、板状体がコ字状に折り返された屈曲部３１、左側片３２及び右側片３３を有する金具本体３４を含んで構成され、コ字状の屈曲部３１が上昇防止筋１１の挿入部となっている。左側片３２、右側片３３のそれぞれの一側縁より補強リング挿入用の挿入溝３５が形成され、屈曲部３１の頂部に固定用ボルト挿通用の挿通孔３６が形成され、屈曲部３１の内側に挿通孔３６に連通するナット３７が固着され、挿通孔３６を通してナット３７に固定用のボルト３８が回動自在に装着されている。   The fixing metal fitting 30 is configured to include a metal fitting body 34 having a bent portion 31 in which a plate-like body is folded back in a U shape, a left piece 32, and a right piece 33, and the U-shaped bent portion 31 is an ascending prevention muscle. 11 insertion portions. An insertion groove 35 for inserting a reinforcing ring is formed from one side edge of each of the left piece 32 and the right piece 33, and an insertion hole 36 for inserting a fixing bolt is formed at the top of the bent portion 31. A nut 37 communicating with the insertion hole 36 is fixed to the nut 37, and a fixing bolt 38 is rotatably attached to the nut 37 through the insertion hole 36.

次に実施の形態（１）に係る上昇防止用組付体１０の鉄筋籠１への組み付け方法の一例について説明する。鉄筋籠１を組み立てた後、横臥させた状態の鉄筋籠１の底面側端部の補強リング３に上昇防止筋１１を固定用金具３０で固定していく。   Next, an example of a method for assembling the assembling body 10 for preventing elevation according to the embodiment (1) to the reinforcing bar 1 will be described. After assembling the reinforcing bar 1, the ascending prevention bar 11 is fixed to the reinforcing ring 3 at the bottom side end of the reinforcing bar 1 in a state of being laid down by the fixing bracket 30.

まず、鉄筋籠１の中心部より下側の補強リング３に上昇防止筋１１を固定用金具３０で固定していく。補強リング３に上昇防止筋１１を固定用金具３０で固定する手順は、固定用金具３０の屈曲部３１に上昇防止筋１１の折曲部１２を挿入し、上昇防止筋１１の折曲部１２を補強リング３の外側の所定位置に当接させながら、固定用金具３０の挿入溝３５を補強リング３に嵌め込む。その後、電動工具（インパクトレンチ等）を用いて、固定用金具３０に装着された固定用のボルト３８を回動させて、ボルト３８の先端部を上昇防止筋１１に押し当て、補強リング３と上昇防止筋１１との交差部を締め付けて、上昇防止筋１１を補強リング３に固定していく。   First, the ascending prevention bar 11 is fixed to the reinforcing ring 3 below the center part of the reinforcing bar 1 with the fixing bracket 30. The procedure of fixing the ascent prevention bar 11 to the reinforcing ring 3 with the fixing bracket 30 is performed by inserting the bent portion 12 of the ascent prevention bar 11 into the bent portion 31 of the fixing bracket 30 and the bent portion 12 of the rising prevention bar 11. Is inserted into the reinforcing ring 3 while the abutment is in contact with a predetermined position outside the reinforcing ring 3. Thereafter, using a power tool (impact wrench or the like), the fixing bolt 38 attached to the fixing bracket 30 is rotated so that the tip of the bolt 38 is pressed against the ascent prevention muscle 11, and the reinforcing ring 3 The crossing with the ascent prevention muscle 11 is tightened to fix the ascent prevention muscle 11 to the reinforcing ring 3.

鉄筋籠１の中心部より下側の補強リング３への上昇防止筋１１の取り付けを終えると、次に、これら上昇防止筋１１に支持部材２０を取り付ける。環状部２１、２２を垂直に立ち上げた状態の支持部材２０の下側の隙間２４に、補強リング３の中央部より下側に固定されている上昇防止筋１１の一端部を挿し込みながら、支持部材２０を落とし込む。   When the attachment of the rise prevention bars 11 to the reinforcing ring 3 below the central portion of the reinforcing bar 1 is finished, the support member 20 is then attached to the rise prevention bars 11. While inserting one end portion of the ascending prevention muscle 11 fixed below the center portion of the reinforcing ring 3 into the lower gap 24 of the support member 20 in a state where the annular portions 21 and 22 are vertically raised, The support member 20 is dropped.

支持部材２０の略水平方向に位置させた左右の連結部２３に、補強リング３の中央付近に略水平方向に固定される上昇防止筋１１の一端部を挿入し、該上昇防止筋１１の折曲部１２と補強リング３とを固定用金具３０で固定する。なお、取付け作業を容易にするため、補強リング３に吊るしたチェーン等の吊り具で支持部材２０を吊った状態に保持してもよい。これにより、支持部材２０を鉄筋籠１の中央部付近に配置させることができる。なお、支持部材２０の取付け状態の安定性を高めるために、一部の上昇防止筋１１と支持部材２０の環状部２１、２２とを、金具等により固定してもよい。   One end portion of the rising prevention muscle 11 fixed in the substantially horizontal direction is inserted in the vicinity of the center of the reinforcing ring 3 into the left and right connecting portions 23 positioned in the substantially horizontal direction of the support member 20, and the rising prevention muscle 11 is folded. The curved portion 12 and the reinforcing ring 3 are fixed by a fixing metal fitting 30. In addition, in order to make attachment work easy, you may hold | maintain the support member 20 in the state suspended with the lifting tools, such as the chain hung on the reinforcement ring 3. FIG. Thereby, the support member 20 can be arrange | positioned near the center part of the reinforcing bar 1. In addition, in order to improve the stability of the attachment state of the support member 20, you may fix a part of raising prevention | strengthening reinforcement | strength 11 and the annular parts 21 and 22 of the support member 20 with metal fittings.

次に、鉄筋籠１の中心部より上側の補強リング３に上昇防止筋１１を固定用金具３０で固定していく。まず、上昇防止筋１１の一端部を支持部材２０の隙間２４に挿入し、上昇防止筋１１の折曲部１２に固定用金具３０の屈曲部３１を挿入し、上昇防止筋１１の折曲部１２を補強リング３の外側の所定位置に当接させながら、固定用金具３０の挿入溝３５を補強リング３に嵌め込む。その後、電動工具（インパクトレンチ等）を用いて、固定用金具３０に装着された固定用のボルト３８を回動させて、ボルト３８の先端部を上昇防止筋１１に押し当て、補強リング３と上昇防止筋１１との交差部を締め付けて、上昇防止筋１１を補強リング３に固定していき、鉄筋籠１の中心部より上側の補強リング３への上昇防止筋の取り付けを終え、組み付け作業を終える。なお、支持部材２０が鉄筋籠１の中央部からずれていたとしても、鉄筋籠１を建て起こした状態で、支持部材２０の位置を修正することができる。   Next, the rise prevention bar 11 is fixed to the reinforcing ring 3 above the center portion of the reinforcing bar 1 with the fixing bracket 30. First, one end portion of the rise preventing muscle 11 is inserted into the gap 24 of the support member 20, and the bent portion 31 of the fixing metal fitting 30 is inserted into the bent portion 12 of the rise preventing muscle 11. The insertion groove 35 of the fixing metal fitting 30 is fitted into the reinforcing ring 3 while bringing 12 into contact with a predetermined position outside the reinforcing ring 3. Thereafter, using a power tool (impact wrench or the like), the fixing bolt 38 attached to the fixing bracket 30 is rotated so that the tip of the bolt 38 is pressed against the ascent prevention muscle 11, and the reinforcing ring 3 By tightening the intersection with the rise prevention bar 11 and fixing the rise prevention bar 11 to the reinforcement ring 3, the installation of the rise prevention bar to the reinforcement ring 3 above the central part of the reinforcing bar 1 is finished, and the assembling work Finish. Even if the support member 20 is displaced from the central portion of the reinforcing bar 1, the position of the supporting member 20 can be corrected in a state where the reinforcing bar 1 is erected.

また、上昇防止用組付体１０の鉄筋籠１への組み付け方法は上記の方法に限定されるものではなく、上昇防止筋１１や支持部材２０の取付け順序や取付け方法は、適宜変更することができ、また、鉄筋籠１を建て起こした状態で取り付けるようにしてもよい。   In addition, the method of assembling the ascent prevention assembly 10 to the reinforcing bar 1 is not limited to the above method, and the order and method of attaching the ascent prevention bars 11 and the support member 20 can be changed as appropriate. Alternatively, the reinforcing bar 1 may be attached in a erected state.

次に、実施の形態に係る上昇防止用組付体１０が組み付けられた鉄筋籠１を用いた場所打ちコンクリート杭の施工法のうちオールケーシング工法による施工法について説明する。上昇防止用組付体１０が組み付けられた鉄筋籠１を用いる点を除いて、従来のオールケーシング工法と同様の方法により施行される。   Next, the construction method by the all casing construction method among the construction methods of the cast-in-place concrete pile using the reinforcing bar 1 to which the assembling body 10 for preventing the elevation according to the embodiment is assembled will be described. It is enforced by the same method as the conventional all-casing method except that the reinforcing bar 1 to which the assembling body 10 for ascent prevention is assembled is used.

すなわち、掘削機（図示せず）を地盤に水平に据付け、ケーシングチューブ（図示せず）の中心と杭心とを合わせる。次に前記ケーシングチューブを掘削全長にわたって揺動（回転）させて押込みながらハンマグラブ（図示せず）で前記ケーシングチューブ内の土砂を掘削し、支持層を確認後、根入れ掘削を行う。前記ハンマグラブによる底ざらい完了後、沈殿バケット（図示せず）を孔底へ投入し沈殿待ちの後スライムと共に引き上げる。   That is, an excavator (not shown) is installed horizontally on the ground, and the center of the casing tube (not shown) and the pile core are aligned. Next, the casing tube is swung (rotated) over the entire length of excavation, and the sand and sand in the casing tube is excavated with a hammer magnet (not shown) while being pushed in. After confirming the support layer, the excavation is performed. After completion of the roughening by the hammaglab, a sedimentation bucket (not shown) is put into the hole bottom, and after waiting for sedimentation, it is pulled up together with the slime.

次に、上昇防止用組付体１０が組み付けられた鉄筋籠１を孔内中央に鉛直に建て込む。その後、トレミー管（図示せず）を孔内に挿入し、前記トレミー管からコンクリートを流し込み、孔内にコンクリートを打ち込む。コンクリートを打ち込みながら前記ケーシングチューブ及び前記トレミー管を引き抜き、回収する。その後、空掘り部分の埋め戻しを行い、作業を終える。   Next, the reinforcing bar 1 assembled with the assembling body 10 for preventing ascent is built vertically in the center of the hole. Thereafter, a tremy tube (not shown) is inserted into the hole, concrete is poured from the tremy tube, and the concrete is driven into the hole. Pulling out the casing tube and the tremy tube while putting in concrete, and recovering it. After that, the back dug portion is backfilled to finish the work.

上記実施の形態（１）に係る上昇防止用組付体１０によれば、鉄筋籠１の下端中央部に支持部材２０を配置するとともに、鉄筋籠１の下端中央部から放射状に均等配置した複数の上昇防止筋１１の一端部を支持部材２０の隙間２４に支持させ、複数の上昇防止筋１１の折曲部１２を固定用金具３０で鉄筋籠１の補強リング３に固定することで、従来の井桁状組付体のように鉄筋部材の交差部や鉄筋籠との連結部を番線結束や溶接を行うことなく、鉄筋籠１の下端部に簡単かつ迅速に組み付けることができる。   According to the assembling assembly 10 for preventing elevation according to the embodiment (1), the support member 20 is disposed at the center of the lower end of the reinforcing bar 1, and a plurality of radial members are equally disposed radially from the center of the lower end of the reinforcing bar 1. One end portion of the anti-raising bar 11 is supported by the gap 24 of the support member 20, and the bent portions 12 of the plural anti-raising bars 11 are fixed to the reinforcing ring 3 of the reinforcing bar 1 with the fixing bracket 30. The crossing part of the reinforcing bar member and the connecting part with the reinforcing bar rod can be easily and quickly assembled to the lower end portion of the reinforcing bar rod 1 without performing the wire-line bundling or welding as in the case of the cross-girder assembly.

また、鉄筋籠１の半径よりも短い、同じ長さ及び形状の複数の上昇防止筋１１を準備すればよいため、従来の井桁状組付体のように、１つの鉄筋籠に対して異なる長さの（弦の長さの違いに応じた）鉄筋部材を製作する必要のない組付体とすることができる。   In addition, since it is only necessary to prepare a plurality of rising prevention bars 11 having the same length and shape that are shorter than the radius of the reinforcing bar 1, different lengths are used for one reinforcing bar like a conventional cross-girder assembly. It can be set as the assembly which does not need to manufacture the reinforcing bar member (it respond | corresponds to the difference in the length of a string).

また、支持部材２０の隙間２４に対する上昇防止筋１１の一端部の挿し込み量を調整できるため、組み立て後の鉄筋籠１のサイズに誤差が生じている場合や、直径サイズが一定の範囲で異なる鉄筋籠であっても一種類（同一長さ・形状）の上昇防止筋１１で対応することができ、一定の汎用性を持たせることが可能となり利便性を高めることができる。   Moreover, since the insertion amount of the one end part of the ascent prevention bar | burr 11 with respect to the clearance gap 24 of the supporting member 20 can be adjusted, when the error has arisen in the size of the reinforcing bar 1 after an assembly, or a diameter size differs in a fixed range. Even a reinforcing bar rod can be handled with one type (same length and shape) of the anti-raising bar 11 and can have a certain versatility, thereby improving convenience.

また、上記実施の形態（１）に係る上昇防止用組付体１０が組み付けられた鉄筋籠１によれば、従来の井桁状組付体のように鉄筋部材の交差部や鉄筋籠との連結部を番線での結束や溶接作業を行うことなく、上昇防止用組付体１０を鉄筋籠１の下端部に簡単かつ迅速に組み付けることができ、鉄筋籠１の組み立て作業の効率化を図ることができ、かつ杭基礎を施工する際における鉄筋籠１の共上りや浮上りを確実に防止することが可能となる。   Moreover, according to the reinforcing bar 1 assembled with the assembling assembly 10 for preventing the rising according to the above embodiment (1), it is connected to the crossing portion of the reinforcing bar member or the reinforcing bar bar like the conventional cross-girder assembly. The assembling body 10 for preventing ascending can be easily and quickly assembled to the lower end portion of the reinforcing bar 1 without tying the parts together with a wire or welding work, and improving the efficiency of the assembling work of the reinforcing bar 1 In addition, it is possible to reliably prevent the reinforcement of the reinforcing bar 1 during the construction of the pile foundation.

また、上記実施の形態（１）に係る上昇防止用組付体１０が組み付けられた鉄筋籠１を用いた場所打ち杭の施工法によれば、鉄筋籠１の組み立て作業の効率化を図ることにより場所打ち杭の施工をスムーズに行うことができ、かつ杭基礎を施工する際における鉄筋籠１の共上りや浮上りを確実に防止することができる。   Moreover, according to the construction method of the cast-in-place pile using the reinforcing bar 1 in which the assembling body 10 for preventing the rising according to the embodiment (1) is assembled, the efficiency of the assembling work of the reinforcing bar 1 is improved. Thus, the cast-in-place pile can be smoothly constructed, and the joint uplift and lift of the reinforcing bar 1 can be reliably prevented when constructing the pile foundation.

なお、支持部材２０の形態は、上記実施の形態に限定されるものではない。図２は、別の実施の形態に係る上昇防止用組付体を構成する支持部材の形態を説明するための図であり、（ａ）は底面図、（ｂ）は（ａ）におけるｂ−ｂ線断面図である。   The form of the support member 20 is not limited to the above embodiment. FIG. 2 is a view for explaining the form of a support member constituting an assembly for preventing rise according to another embodiment, (a) is a bottom view, and (b) is b- in (a). It is b line sectional drawing.

上記支持部材２０の上下一対の環状部２１、２２は、縦断面が縦方向に長い帯状鋼板でそれぞれ構成され、前記ケーシングチューブの引き抜き方向に力が加わっても曲がりにくい（変形しにくい）構造となっているが、別の実施の形態に係る上昇防止用組付体を構成する支持部材２０Ａは、上下一対の環状部２１Ａ、２２Ａが、縦断面が横方向長い帯状鋼板でそれぞれ構成されている。係る形態の支持部材２０Ａを用いることにより、平面の面積が増すため、前記ケーシングチューブの引き抜きに対して上方向に対する抵抗を高めることができ、鉄筋籠１の共上り等の上昇現象を防止する効果を高めることができる。   The pair of upper and lower annular portions 21 and 22 of the support member 20 are each composed of a strip-shaped steel plate whose longitudinal section is long in the longitudinal direction, and has a structure that is not easily bent (not easily deformed) even when a force is applied in the drawing direction of the casing tube. However, as for support member 20A which constitutes an assembly for a rise prevention concerning another embodiment, a pair of upper and lower annular parts 21A and 22A are each constituted by a strip steel plate with a long vertical section in the horizontal direction. . By using the supporting member 20A in such a form, the area of the plane is increased, so that the resistance to the upward direction can be increased with respect to the pulling out of the casing tube, and the effect of preventing the rising phenomenon such as the co-up of the reinforcing bar 1 is prevented. Can be increased.

また、図３は、さらに別の実施の形態に係る上昇防止用組付体を構成する支持部材の形態を説明するための図であり、（ａ）は底面図、（ｂ）は（ａ）におけるｂ−ｂ線断面図である。   FIGS. 3A and 3B are views for explaining the form of the support member that constitutes the assembly for preventing ascending according to another embodiment. FIG. 3A is a bottom view, and FIG. It is a bb sectional view taken on the line.

図３に示した、さらに別の形態に係る支持部材２０Ｂは、上下一対の環状部２１Ｂ、２２Ｂが、縦断面が略円形の棒状筋でそれぞれ構成されている。支持部材２０Ｂをかかる構成とした場合も上記実施の形態（１）に係る上昇防止用組付体１０と略同様の効果を得ることができる。   In a support member 20B according to still another embodiment shown in FIG. 3, a pair of upper and lower annular portions 21B and 22B are respectively configured by rod-like streaks having a substantially circular longitudinal section. Even when the support member 20B is configured as described above, it is possible to obtain substantially the same effect as that of the assembly 10 for preventing rise according to the embodiment (1).

図４は、実施の形態（２）に係る上昇防止用組付体を鉄筋籠に組み付けた状態を示した概略図であり、（ａ）は鉄筋籠の底面図、（ｂ）は（ａ）におけるｂ−ｂ線端面図である。   FIG. 4 is a schematic view showing a state where the assembly for preventing elevation according to the embodiment (2) is assembled to a reinforcing bar rod, (a) is a bottom view of the reinforcing rod rod, and (b) is (a). FIG.

実施の形態（２）に係る上昇防止用組付体１０Ａが、実施の形態（１）に係る上昇防止用組付体１０と相違する点は、支持部材２０Ｃの構造及び固定用金具４０の構造にある。実施の形態（１）に係る上昇防止用組付体１０と同一機能を有する構成部品には、同一符号を付し、ここではその説明を省略する。   The rise preventing assembly 10A according to the embodiment (2) is different from the rise preventing assembly 10 according to the embodiment (1) in that the structure of the support member 20C and the structure of the fixing bracket 40 are the same. It is in. Constituent parts having the same functions as those of the ascent prevention assembly 10 according to the embodiment (1) are assigned the same reference numerals, and descriptions thereof are omitted here.

支持部材２０Ｃは、上下一対の円板部（板状部）２５、２６と、上昇防止筋１１の一端部を支持可能な隙間２４を設けて上下一対の円板部２５、２６を連結する連結部２３Ａとを備え、連結部２３Ａが円板部２５、２６の中央部分に１箇所形成されている。   The support member 20 </ b> C is a connection that connects the pair of upper and lower disk parts 25, 26 by providing a pair of upper and lower disk parts (plate-like parts) 25, 26 and a gap 24 that can support one end of the ascent prevention muscle 11. 23A, and the connecting portion 23A is formed at one central portion of the disk portions 25 and 26.

上下一対の円板部２５、２６は、円形の鋼板（厚さ６ｍｍ〜１２ｍｍ程度）でそれぞれ構成されている。連結部２３Ａは、円板部２５、２６の中央部に溶接等により接合され、円柱状又は円筒状の鋼材で構成されている。   The pair of upper and lower disk parts 25 and 26 are each composed of a circular steel plate (thickness of about 6 mm to 12 mm). The connecting portion 23A is joined to the central portions of the disk portions 25 and 26 by welding or the like, and is made of a columnar or cylindrical steel material.

連結部２３Ａの高さにより形成される上下一対の円板部２５、２６の隙間２４は、上昇防止筋１１の一端部を支持可能な大きさ（上昇防止筋１１の直径よりも大きな幅）であれば特に限定されないが、隙間２４に挿入された上昇防止筋１１のぐらつき等を防止する観点から上昇防止筋１１の直径と同じサイズ、または少し大きなサイズに設定することが好ましい。   The gap 24 between the pair of upper and lower disk parts 25, 26 formed by the height of the connecting part 23A has a size capable of supporting one end of the ascent prevention muscle 11 (a width larger than the diameter of the ascent prevention muscle 11). Although there is no particular limitation as long as it is present, it is preferable to set the same size as the diameter of the ascent prevention muscle 11 or a slightly larger size from the viewpoint of preventing wobbling of the ascent prevention muscle 11 inserted into the gap 24.

上下一対の円板部２５、２６の直径は、鉄筋籠１の直径に応じて設定され得る。例えば、鉄筋籠１の直径が１０００ｍｍ〜１５００ｍｍの場合は、直径が約４００ｍｍ〜６００ｍｍの円板部２５、２６が適用され、鉄筋籠１の直径が１６００ｍｍ〜２０００ｍｍの場合は、直径が約５００ｍｍ〜８００ｍｍの円板部２５、２６が適用され、また、鉄筋籠１の直径が２５００ｍｍ〜３０００ｍｍの場合は、直径が１２００ｍｍ〜１５００ｍｍの円板部２５、２６が適用され得る。円板部２５、２６の直径は、鉄筋籠１の半径よりも小さくなるように設定されている。   The diameters of the pair of upper and lower disk parts 25 and 26 can be set according to the diameter of the reinforcing bar 1. For example, when the diameter of the reinforcing bar 1 is 1000 mm to 1500 mm, the disk portions 25 and 26 having a diameter of about 400 mm to 600 mm are applied, and when the diameter of the reinforcing bar 1 is 1600 mm to 2000 mm, the diameter is about 500 mm to The disc portions 25 and 26 of 800 mm are applied, and when the diameter of the reinforcing bar 1 is 2500 mm to 3000 mm, the disc portions 25 and 26 having a diameter of 1200 mm to 1500 mm can be applied. The diameters of the disc parts 25 and 26 are set to be smaller than the radius of the reinforcing bar 1.

上昇防止筋１１の長さは、適用する鉄筋籠１の半径よりも短く、かつ円板部２５、２６の隙間２４に一端部を挿し込んだ際に、挿し込み部分の長さが５０ｍｍ以上確保できる長さに設定されている。上昇防止筋１１は、折曲部１２を補強リング３の外側面に当接させた状態で、固定用金具４０により補強リング３に固定されるようになっている。   The length of the ascent prevention bar 11 is shorter than the radius of the reinforcing bar 1 to be applied, and when the one end part is inserted into the gap 24 between the disk parts 25 and 26, the length of the insertion part is ensured to be 50 mm or more. The length is set as possible. The ascent prevention muscle 11 is fixed to the reinforcing ring 3 by the fixing bracket 40 in a state where the bent portion 12 is in contact with the outer surface of the reinforcing ring 3.

固定用金具４０は、補強リング３を上下方向に挟んで位置し、上昇防止筋１１の折曲部１２を挿入させるための切り欠き部４１を有する把持部４２と、上下２つの把持部４２を連結するねじ孔板部４３とを備えている。ねじ孔板部４３の略中央部には上昇防止筋１１と補強リング３との交差部を締め付けるボルト４５を螺合させるためのねじ孔４４が形成されている。   The fixing bracket 40 is positioned with the reinforcing ring 3 sandwiched in the vertical direction, and includes a gripping portion 42 having a notch portion 41 for inserting the bent portion 12 of the ascent prevention muscle 11, and two upper and lower gripping portions 42. And a screw hole plate portion 43 to be connected. A screw hole 44 for screwing a bolt 45 that tightens the intersection of the ascent prevention bar 11 and the reinforcing ring 3 is formed at a substantially central portion of the screw hole plate portion 43.

次に実施の形態（２）に係る上昇防止用組付体１０Ａの鉄筋籠１への組み付け方法の一例について説明する。鉄筋籠１を組み立てた後、横臥させた状態の鉄筋籠１の底面側端部の補強リング３に上昇防止筋１１を固定用金具４０を用いて固定していく。   Next, an example of a method for assembling the assembling body 10A for preventing elevation according to the embodiment (2) to the reinforcing bar 1 will be described. After assembling the reinforcing bar 1, the ascending prevention bar 11 is fixed to the reinforcing ring 3 at the bottom side end portion of the reinforcing bar 1 in a state of being laid down by using the fixing bracket 40.

まず、鉄筋籠１の中心部より下側の補強リング３に上昇防止筋１１を固定用金具４０で固定していく。補強リング３に上昇防止筋１１を固定用金具４０で固定する手順は、上昇防止筋１１の折曲部１２を補強リング３の外側の所定位置に当てて交差させ、固定用金具４０の上下の把持部４２を、補強リング３を上下方向に挟んで上昇防止筋１１の折曲部１２を把持する位置に位置させる。この際、固定用金具４０のねじ孔板部４３が、補強リング３の内側に位置するようにセットする。次にねじ孔板部４３のねじ孔４４にボルト４５を装着し、ボルト４５を電動工具等で回動させて、補強リング３と上昇防止筋１１の折曲部１２との交差部を締め付けることによって、上昇防止筋１１を補強リング３に固定していく。   First, the ascending prevention bar 11 is fixed to the reinforcing ring 3 below the center portion of the reinforcing bar 1 with the fixing bracket 40. The procedure of fixing the ascent prevention bar 11 to the reinforcing ring 3 with the fixing bracket 40 is made such that the bent portion 12 of the ascent prevention bar 11 is brought into contact with a predetermined position on the outside of the reinforcing ring 3 so as to intersect with each other. The grip portion 42 is positioned at a position where the bent portion 12 of the ascending prevention muscle 11 is gripped with the reinforcing ring 3 sandwiched in the vertical direction. At this time, the screw hole plate portion 43 of the fixing metal fitting 40 is set so as to be positioned inside the reinforcing ring 3. Next, a bolt 45 is attached to the screw hole 44 of the screw hole plate portion 43, and the bolt 45 is rotated with an electric tool or the like to tighten the intersection of the reinforcing ring 3 and the bent portion 12 of the ascent prevention muscle 11. As a result, the rise prevention muscle 11 is fixed to the reinforcing ring 3.

鉄筋籠１の中心部より下側の補強リング３への上昇防止筋１１の取り付けを終えると、次に、これら上昇防止筋１１に支持部材２０Ｃを取り付ける。板状部２５、２６を垂直に立ち上げた状態の支持部材２０Ｃの下側の隙間２４に、補強リング３の中央部より下側に固定されている上昇防止筋１１の一端部を挿し込みながら、支持部材２０Ｃを落とし込み、上昇防止筋１１の一端部の先端に支持部材２０Ｃの連結部２３Ａを当てて、支持部材２０Ｃを上昇防止筋１１に係止させた状態にする。これにより、支持部材２０Ｃを鉄筋籠１の中央部付近に配置させることができる。   When the attachment of the rise prevention bars 11 to the reinforcing ring 3 below the center portion of the reinforcing bar 1 is finished, the support member 20 </ b> C is then attached to the rise prevention bars 11. While inserting one end portion of the ascending prevention muscle 11 fixed below the central portion of the reinforcing ring 3 into the lower gap 24 of the support member 20C in a state where the plate-like portions 25 and 26 are vertically raised. Then, the support member 20C is dropped, and the connecting portion 23A of the support member 20C is applied to the tip of one end portion of the rise prevention muscle 11 so that the support member 20C is engaged with the rise prevention muscle 11. Thereby, 20C of support members can be arrange | positioned in the central part vicinity of the reinforcing bar rod 1. FIG.

次に、鉄筋籠１の中心部より上側の補強リング３に上昇防止筋１１を固定用金具４０で固定していく。まず、上昇防止筋１１の一端部を支持部材２０Ｃの隙間２４に挿入し、上昇防止筋１１の折曲部１２を補強リング３の外側の所定位置に当てて交差させる。次に、固定用金具４０の上下の把持部４２を、補強リング３を上下方向に挟んで上昇防止筋１１の折曲部１２を把持する位置に位置させる。この際、固定用金具４０のねじ孔板部４３が、補強リング３の内側に位置するようにセットする。次にねじ孔板部４３のねじ孔４４にボルト４５を装着し、ボルト４５を電動工具等で回動させて、補強リング３と上昇防止筋１１の折曲部１２との交差部を締め付けることによって、上昇防止筋１１を補強リング３に固定してゆき、鉄筋籠１の中心部より上側の補強リング３への上昇防止筋１１の取り付けを終え、組み付け作業を終える。なお、支持部材２０Ｃが鉄筋籠１の中央部からずれていたとしても、鉄筋籠１を建て起こした状態で、支持部材２０Ｃの位置を修正することができる。   Next, the ascending prevention bar 11 is fixed to the reinforcing ring 3 above the center portion of the reinforcing bar 1 with the fixing bracket 40. First, one end portion of the ascent prevention muscle 11 is inserted into the gap 24 of the support member 20 </ b> C, and the bent portion 12 of the ascent prevention muscle 11 is brought into contact with a predetermined position outside the reinforcing ring 3 so as to intersect. Next, the upper and lower gripping portions 42 of the fixing bracket 40 are positioned so as to grip the bent portion 12 of the ascent prevention muscle 11 with the reinforcing ring 3 sandwiched in the vertical direction. At this time, the screw hole plate portion 43 of the fixing metal fitting 40 is set so as to be positioned inside the reinforcing ring 3. Next, a bolt 45 is attached to the screw hole 44 of the screw hole plate portion 43, and the bolt 45 is rotated with an electric tool or the like to tighten the intersection of the reinforcing ring 3 and the bent portion 12 of the ascent prevention muscle 11. Thus, the rise prevention bar 11 is fixed to the reinforcing ring 3, the attachment of the rise prevention bar 11 to the reinforcement ring 3 above the central portion of the reinforcing bar 1 is finished, and the assembling work is finished. Even if the support member 20C is displaced from the central portion of the reinforcing bar rod 1, the position of the supporting member 20C can be corrected in a state where the reinforcing bar rod 1 is erected.

また、上昇防止用組付体１０Ａの鉄筋籠１への組み付け方法は上記の方法に限定されるものではなく、上昇防止筋１１や支持部材２０Ｃの取付け順序や取付け方法は、適宜変更することができ、また、鉄筋籠１を建て起こした状態で取り付けるようにしてもよい。   Further, the method of assembling the ascent prevention assembly 10A to the reinforcing bar 1 is not limited to the above method, and the assembling order and the assembling method of the ascent prevention bar 11 and the support member 20C can be changed as appropriate. Alternatively, the reinforcing bar 1 may be attached in a erected state.

また、実施の形態に係る上昇防止用組付体１０Ａが組み付けられた鉄筋籠１を用いた場所打ちコンクリート杭の施工法は、上昇防止用組付体１０Ａが組み付けられた鉄筋籠１を用いる点を除いて、従来の施行法と同様の方法であるため、ここではその説明を省略することとする。   Moreover, the construction method of the cast-in-place concrete pile using the reinforcing bar 1 with which the assembling body 10A for raising prevention according to the embodiment is assembled uses the reinforcing bar 1 with the assembling body 10A for preventing rising. Except for, the method is the same as the conventional enforcement method, so the description thereof will be omitted here.

上記実施の形態（２）に係る上昇防止用組付体１０Ａによれば、上記した実施の形態（１）に係る上昇防止用組付体１０と同様の効果を得ることができ、また、支持部材２０Ｃが上下一対の円板部２５、２６で構成されているので、平面の面積を大きくとることができ、前記ケーシングチューブの引き抜きに対して上方向に対する抵抗を高めることができ、鉄筋籠１の共上り等の上昇現象を防止する効果を一層高めることができる。なお、上記実施の形態に係る上昇防止用組付体１０Ａでは、固定用金具４０を使用したが、固定用金具３０を使用することもできる。   According to the assembly 10A for preventing rise according to the above embodiment (2), the same effect as that of the assembly 10 for preventing rise according to the above described embodiment (1) can be obtained and supported. Since the member 20C is composed of a pair of upper and lower disk portions 25, 26, the area of the plane can be increased, the resistance to the upward direction against the withdrawal of the casing tube can be increased, and the reinforcing bar 1 It is possible to further enhance the effect of preventing the rising phenomenon such as co-up. In addition, in the assembling body 10A for preventing elevation according to the above embodiment, the fixing bracket 40 is used, but the fixing bracket 30 can also be used.

また、上記実施の形態（２）に係る上昇防止用組付体１０Ａが組み付けられた鉄筋籠１によれば、上昇防止用組付体１０Ａを鉄筋籠１の下端部に簡単かつ迅速に組み付けることができ、鉄筋籠１の組み立て作業の効率化を図ることができ、かつ杭基礎を施工する際における鉄筋籠１の共上りや浮上りを確実に防止することが可能となる。   In addition, according to the reinforcing bar 1 with the assembling assembly 10 </ b> A for ascending prevention according to the above embodiment (2), the assembling body 10 </ b> A for preventing rising is easily and quickly assembled to the lower end portion of the reinforcing bar 1. Therefore, it is possible to improve the efficiency of the assembling work of the reinforcing bar 1 and to surely prevent the reinforcing bar 1 from rising or rising when constructing the pile foundation.

また、上記実施の形態（２）に係る上昇防止用組付体１０Ａが組み付けられた鉄筋籠１を用いた場所打ち杭の施工法によれば、鉄筋籠１の組み立て作業の効率化を図ることにより場所打ち杭の施工をスムーズに行うことができ、かつ杭基礎を施工する際における鉄筋籠１の共上りや浮上りを確実に防止することができる。   Moreover, according to the construction method of the cast-in-place pile using the reinforcing bar 1 to which the assembling body 10A for preventing rising according to the embodiment (2) is assembled, the efficiency of the assembling work of the reinforcing bar 1 is improved. Thus, the cast-in-place pile can be smoothly constructed, and the joint uplift and lift of the reinforcing bar 1 can be reliably prevented when constructing the pile foundation.

なお、支持部材２０Ｃは、上記した形態に限定されるものではない。図５は、別の実施の形態に係る上昇防止用組付体を構成する支持部材の形態を説明するための図であり、（ａ）は底面図、（ｂ）は（ａ）におけるｂ−ｂ線断面図である。   Note that the support member 20C is not limited to the above-described form. FIGS. 5A and 5B are views for explaining the form of a support member constituting an assembly for preventing rise according to another embodiment, wherein FIG. 5A is a bottom view, and FIG. 5B is b- in FIG. It is b line sectional drawing.

上記した支持部材２０Ｃは、連結部２３Ａが円板部２５、２６の中央部に形成されているが、連結部の形成箇所は、この位置に限定されるものではなく、別の形態に係る支持部材２０Ｄは、図５に示したように、円板部２５、２６の周上の複数箇所、９０度間隔で４箇所に連結部２３Ｂを形成した構成となっている。なお、連結部２３Ｂの数は上下一対の円板部の大きさ（直径）に応じて増やすことも可能であり、連結部２３Ｂの横幅や設置位置は、上昇防止筋１１の隙間２４への挿入に妨げにならない幅や位置に設定される。なお、連結部２３Ｂは、上昇防止筋１１の一端部を挿入可能な一対の連結片で構成されているが、この形態に限定されるものではない。   In the above-described support member 20C, the connecting portion 23A is formed at the center of the disk portions 25 and 26, but the place where the connecting portion is formed is not limited to this position, and the support according to another embodiment is provided. As shown in FIG. 5, the member 20 </ b> D has a configuration in which connecting portions 23 </ b> B are formed at a plurality of locations on the circumference of the disk portions 25 and 26, at four locations at intervals of 90 degrees. The number of connecting portions 23B can be increased according to the size (diameter) of a pair of upper and lower disk portions, and the width and installation position of the connecting portions 23B can be inserted into the gap 24 of the ascent prevention muscle 11. It is set to a width and position that do not interfere with the operation. In addition, although the connection part 23B is comprised with a pair of connection piece which can insert the one end part of the raising prevention muscle 11, it is not limited to this form.

図６は、実施の形態（３）に係る鉄筋籠の上昇防止用組付体を鉄筋籠に組み付けた状態を示した概略図であり、（ａ）は鉄筋籠の底面図、（ｂ）は（ａ）におけるｂ−ｂ線端面図である。   FIG. 6 is a schematic view showing a state in which the assembly for preventing the reinforcement of the reinforcing rod according to the embodiment (3) is assembled to the reinforcing rod, (a) is a bottom view of the reinforcing rod, and (b) It is a bb line end view in (a).

実施の形態（３）に係る上昇防止用組付体１０Ｂが、実施の形態（１）に係る上昇防止用組付体１０と相違する点は、支持部材２０Ｅの構造にある。実施の形態（１）に係る上昇防止用組付体１０と同一機能を有する構成部品には、同一符号を付し、ここではその説明を省略する。   A point of difference between the assembling assembly 10 </ b> B for ascending prevention according to the embodiment (3) and the assembling body 10 for ascent preventing according to the embodiment (1) is in the structure of the support member 20 </ b> E. Constituent parts having the same functions as those of the ascent prevention assembly 10 according to the embodiment (1) are assigned the same reference numerals, and descriptions thereof are omitted here.

支持部材２０Ｅは、複数の上昇防止筋１１の一端部を挿通させて支持する支持孔２７が側面に所定間隔（上昇防止筋１１の設置本数に応じた間隔）を設けて形成されたリング部材２８で構成されている。リング部材２８は、縦断面が縦方向に長い帯状鋼板（縦幅７５ｍｍ〜１００ｍｍ、厚さ６ｍｍ〜１２ｍｍ程度）で構成されている。   The support member 20E is a ring member 28 in which support holes 27 for inserting and supporting one end portions of the plurality of anti-raising bars 11 are provided on the side surfaces with a predetermined interval (an interval corresponding to the number of the anti-raising bars 11 installed). It consists of The ring member 28 is made of a strip-shaped steel plate (longitudinal width 75 mm to 100 mm, thickness 6 mm to 12 mm) whose longitudinal section is long in the longitudinal direction.

支持孔２７のサイズは、上昇防止筋１１の一端部を支持可能なサイズ（上昇防止筋１１の断面よりも大きな孔サイズ）であれば特に限定されないが、挿入された上昇防止筋１１のぐらつき等を防止する観点から上昇防止筋１１の直径と同じ孔サイズ、または少し大きな孔サイズに設定することが好ましい。   The size of the support hole 27 is not particularly limited as long as it is a size capable of supporting one end portion of the ascent prevention muscle 11 (a hole size larger than the cross section of the ascent prevention muscle 11). From the viewpoint of preventing this, it is preferable to set the hole size to be the same as or slightly larger than the diameter of the ascent prevention muscle 11.

リング部材２８の直径は、鉄筋籠１の直径に応じて設定され得る。例えば、鉄筋籠１の直径が１０００ｍｍ〜１５００ｍｍの場合は、直径が約４００ｍｍ〜６００ｍｍのリング部材２８が適用され、鉄筋籠１の直径が１６００ｍｍ〜２０００ｍｍの場合は、直径が約５００ｍｍ〜８００ｍｍのリング部材２８が適用され、また、鉄筋籠１の直径が２５００ｍｍ〜３０００ｍｍの場合は、直径が１２００ｍｍ〜１５００ｍｍのリング部材２８が適用され得る。リング部材２８の直径は、鉄筋籠１の半径よりも小さくなるように設定することが好ましい。   The diameter of the ring member 28 can be set according to the diameter of the reinforcing bar 1. For example, when the diameter of the reinforcing bar 1 is 1000 mm to 1500 mm, the ring member 28 having a diameter of about 400 mm to 600 mm is applied. When the diameter of the reinforcing bar 1 is 1600 mm to 2000 mm, the ring has a diameter of about 500 mm to 800 mm. When the member 28 is applied and the diameter of the reinforcing bar 1 is 2500 mm to 3000 mm, the ring member 28 having a diameter of 1200 mm to 1500 mm can be applied. The diameter of the ring member 28 is preferably set to be smaller than the radius of the reinforcing bar 1.

上昇防止筋１１の長さは、適用する鉄筋籠１の半径よりも短く、かつリング部材２８の支持孔２７に一端部を挿し込んだ際に、挿し込み部分の長さが５０ｍｍ以上確保できる長さに設定されている。上昇防止筋１１は、折曲部１２を補強リング３の外側面に当接させた状態で、固定用金具３０により補強リング３に固定される。   The length of the ascent prevention bar 11 is shorter than the radius of the reinforcing bar 1 to be applied, and when the one end part is inserted into the support hole 27 of the ring member 28, the length of the insertion part can be ensured to be 50 mm or more. Is set. The rise prevention muscle 11 is fixed to the reinforcing ring 3 by the fixing bracket 30 in a state where the bent portion 12 is in contact with the outer surface of the reinforcing ring 3.

次に実施の形態（３）に係る上昇防止用組付体１０Ｂの鉄筋籠１への組み付け方法の一例について説明する。鉄筋籠１を組み立てた後、横臥させた状態の鉄筋籠１の底面側端部の補強リング３にチェーン等の吊り具を用いて、支持部材２０Ｅを鉄筋籠１の中央部付近に吊り下げた状態（リング部材２８を垂直に立ち上げた状態）にセットする。   Next, an example of a method for assembling the ascent prevention assembly 10B according to the embodiment (3) to the reinforcing bar 1 will be described. After assembling the reinforcing bar 1, the support member 20 </ b> E is hung near the central part of the reinforcing bar 1 by using a chain or other hoisting tool on the reinforcing ring 3 at the bottom side end of the reinforcing bar 1 in the lying state. The state is set (the ring member 28 is raised vertically).

次に、上昇防止筋１１の一端部を支持部材２０Ｅの支持孔２７に挿入し、他端部の折曲部１２を補強リング３に固定していく。上昇防止筋１１は、支持部材２０Ｅの円周上のどの位置から取り付けても問題はないが、支持部材２０Ｅのふら付きを抑えるため、左右の方向から取り付けることが好ましい。   Next, one end of the ascending prevention muscle 11 is inserted into the support hole 27 of the support member 20 </ b> E, and the bent portion 12 at the other end is fixed to the reinforcing ring 3. There is no problem even if the anti-raising bar 11 is attached from any position on the circumference of the support member 20E, but it is preferably attached from the left and right directions in order to suppress the wobbling of the support member 20E.

固定用金具３０の屈曲部３１に上昇防止筋１１の折曲部１２を挿入し、上昇防止筋１１の折曲部１２を補強リング３の外側の所定位置に当接させながら、補強リング３に固定用金具３０の挿入溝３５を嵌め込む。その後、電動工具（インパクトレンチ等）を用いて、固定用金具３０に装着されたボルト３８を回動させて、ボルト３８の先端部を上昇防止筋１１に押し当て、補強リング３と上昇防止筋１１との交差部を締め付けて、上昇防止筋１１を補強リング３の全周に順次固定してゆき、組み付け作業を終える。なお、支持部材２０Ｅが鉄筋籠１の中央部からずれていたとしても、鉄筋籠１を建て起こした状態で、支持部材２０Ｅの位置を修正することができる。   Insert the bent portion 12 of the ascending prevention muscle 11 into the bent portion 31 of the fixing bracket 30, and bring the bent portion 12 of the ascent preventing muscle 11 into contact with a predetermined position outside the reinforcing ring 3. The insertion groove 35 of the fixing bracket 30 is fitted. Thereafter, using an electric tool (impact wrench or the like), the bolt 38 attached to the fixing bracket 30 is rotated, the tip of the bolt 38 is pressed against the ascent prevention muscle 11, and the reinforcing ring 3 and the ascent prevention muscle are pressed. 11 is tightened, the ascending prevention muscle 11 is sequentially fixed to the entire circumference of the reinforcing ring 3, and the assembling work is completed. Even if the support member 20E is displaced from the central portion of the reinforcing bar rod 1, the position of the supporting member 20E can be corrected in a state where the reinforcing bar rod 1 is erected.

また、上昇防止用組付体１０Ｂの鉄筋籠１への組み付け方法は上記の方法に限定されるものではなく、上昇防止筋１１や支持部材２０Ｅの取付け順序や取付け方法は、適宜変更することができ、また、鉄筋籠１を建て起こした状態で取り付けるようにしてもよい。   Further, the method of assembling the ascent prevention assembly 10B to the reinforcing bar 1 is not limited to the above method, and the assembling order and the assembling method of the ascent prevention bar 11 and the support member 20E can be changed as appropriate. Alternatively, the reinforcing bar 1 may be attached in a erected state.

また、実施の形態（３）に係る上昇防止用組付体１０Ｂが組み付けられた鉄筋籠１を用いた場所打ちコンクリート杭の施工法は、上昇防止用組付体１０Ｂが組み付けられた鉄筋籠１を用いる点を除いて、従来の施行法と同様の方法であるため、ここではその説明を省略することとする。   Moreover, the construction method of the cast-in-place concrete pile using the reinforcing bar 1 with which the assembly 10B for prevention of raising which concerns on embodiment (3) was assembled | attached is the reinforcing bar 1 with which the assembly 10B for prevention of raising was assembled. Since it is the same method as the conventional enforcement method, except that the point is used, the description thereof will be omitted here.

上記実施の形態（３）に係る上昇防止用組付体１０Ｂによれば、上記した実施の形態（１）に係る上昇防止用組付体１０と同様の効果を得ることができ、また、支持部材２０Ｅが複数の支持孔２７が形成されたリング部材２８で構成されているので、上昇防止筋１１の一端部を支持孔２７に挿入して支持させることができ、上昇防止筋１１の支持部材２０Ｅへの取付け安定性を高めることができる。なお、上記実施の形態（３）に係る上昇防止用組付体１０Ｂでは、固定用金具３０を使用したが、固定用金具４０を使用することもできる。   The rise preventing assembly 10B according to the above embodiment (3) can provide the same effects as those of the above rise preventing assembly 10 according to the above embodiment (1), and support. Since the member 20E is composed of the ring member 28 in which a plurality of support holes 27 are formed, one end of the ascent prevention muscle 11 can be inserted into the support hole 27 to be supported. Mounting stability to 20E can be improved. In addition, in the assembling body 10B for preventing ascending according to the above embodiment (3), the fixing bracket 30 is used, but the fixing bracket 40 can also be used.

また、上記実施の形態（３）に係る上昇防止用組付体１０Ｂが組み付けられた鉄筋籠１によれば、上昇防止用組付体１０Ｂを鉄筋籠１の下端部に簡単かつ迅速に組み付けることができ、鉄筋籠１の組み立て作業の効率化を図ることができ、かつ杭基礎を施工する際における鉄筋籠１の共上りや浮上りを確実に防止することが可能となる。   Moreover, according to the reinforcing bar 1 with the assembling assembly 10 </ b> B for ascent prevention according to the above embodiment (3), the assembling body 10 </ b> B for ascending prevention is easily and quickly assembled to the lower end portion of the reinforcing bar 1. Therefore, it is possible to improve the efficiency of the assembling work of the reinforcing bar 1 and to surely prevent the reinforcing bar 1 from rising or rising when constructing the pile foundation.

また、上記実施の形態（３）に係る上昇防止用組付体１０Ｂが組み付けられた鉄筋籠１を用いた場所打ち杭の施工法によれば、鉄筋籠１の組み立て作業の効率化を図ることにより場所打ち杭の施工をスムーズに行うことができ、かつ杭基礎を施工する際における鉄筋籠１の共上りや浮上りを確実に防止することができる。   Moreover, according to the construction method of the cast-in-place pile using the reinforcing bar 1 to which the assembling body 10B for preventing rising according to the embodiment (3) is assembled, the efficiency of the assembling work of the reinforcing bar 1 is improved. Thus, the cast-in-place pile can be smoothly constructed, and the joint uplift and lift of the reinforcing bar 1 can be reliably prevented when constructing the pile foundation.

本発明に係る上昇防止用組付体を構成する固定用金具は、上記した固定用金具３０、４０に限定されるものではなく、補強リング３と上昇防止筋１１との交差部を固定できる種々の形態の金具が採用され得るが、電動工具などで誰でも簡単に取り付けることができる構造のものが好ましい。   The fixing brackets constituting the assembly for preventing elevation according to the present invention are not limited to the above-described fixing brackets 30 and 40, and various types capable of fixing the intersecting portion of the reinforcing ring 3 and the elevation preventing muscles 11 are possible. However, it is preferable to have a structure that anyone can easily attach with a power tool or the like.

また、上昇防止筋１１の形態は、Ｌ型棒状筋に限定されるものではなく、補強リング３に固定用金具３０、４０で取付け可能な種々の形態のものが採用され得る。また、支持部材２０、２０Ａ、２０Ｂ、２０Ｃ、２０Ｄ、２０Ｅの平面形状は円形に限定されるものではない。   Further, the form of the ascent prevention bar 11 is not limited to the L-shaped bar bar, and various forms that can be attached to the reinforcing ring 3 with the fixing brackets 30 and 40 can be adopted. Further, the planar shape of the support members 20, 20A, 20B, 20C, 20D, and 20E is not limited to a circle.

また、本発明に係る上昇防止用組付体が組み付けられた鉄筋籠は、オールケーシング工法以外の各種の場所打ち杭の施工法にも適用することができ、杭孔へのコンクリート打設をいったん中断しケーシングチューブを引き抜く際、鉄筋籠も一緒に上昇する浮上り現象なども防止することもできる。   In addition, the reinforcing bar with the assembly for preventing rising according to the present invention can be applied to various cast-in-place pile construction methods other than the all-casing construction method, and once the concrete placement in the pile hole is interrupted When the casing tube is pulled out, it is possible to prevent the floating phenomenon that the reinforcing bar rod also rises together.

１ 鉄筋籠
２ 主筋
３ 補強リング
１０、１０Ａ、１０Ｂ 上昇防止用組付体
１１ 上昇防止筋
２０、２０Ａ、２０Ｂ、２０Ｃ、２０Ｄ、２０Ｅ 支持部材
２１、２１Ａ、２１Ｂ 環状部
２２、２２Ａ、２２Ｂ 環状部
２３、２３Ａ、２３Ｂ 連結部
２４ 隙間
２５、２５Ａ 円板部
２６、２６Ａ 円板部
２７ 支持孔
２８ リング部材
３０、４０ 固定用金具 DESCRIPTION OF SYMBOLS 1 Reinforcement rod 2 Main reinforcement 3 Reinforcement ring 10, 10A, 10B Ascension prevention assembly 11 Elevation prevention muscle 20, 20A, 20B, 20C, 20D, 20E Support member 21, 21A, 21B Annular part 22, 22A, 22B Annular part 23, 23A, 23B Connecting portion 24 Clearance 25, 25A Disc portion 26, 26A Disc portion 27 Support hole 28 Ring member 30, 40 Fixing bracket

Claims (5)

場所打ち杭の施工時に、杭孔内に建て込んだ鉄筋籠の上昇を防止するため、前記鉄筋籠の下端部に組み付ける鉄筋籠の上昇防止用組付体であって、
前記鉄筋籠の下端中央部から放射状に配置される複数の上昇防止筋と、
前記鉄筋籠の下端中央部で前記複数の上昇防止筋の一端部を支持する支持部材と、
前記複数の上昇防止筋の他端部を前記鉄筋籠に固定する固定用金具とを備え、
前記支持部材が、上下一対の環状部と、前記上昇防止筋の一端部を支持可能な隙間を設けて前記上下一対の環状部を連結する連結部とを備え、
該連結部が、前記環状部の周上の複数箇所に形成されていることを特徴とする鉄筋籠の上昇防止用組付体。 In order to prevent the rise of the reinforcing rods built in the pile hole during the construction of the cast-in-place pile, an assembly for preventing the reinforcing rods from being assembled to the lower end of the reinforcing rods,
A plurality of anti-raising bars arranged radially from the lower end central part of the reinforcing bar,
A support member that supports one end of the plurality of anti-raising bars at the lower center of the reinforcing bar,
A fixing bracket for fixing the other end of the plurality of rising prevention bars to the reinforcing bar rod ,
The support member includes a pair of upper and lower annular portions and a connecting portion that connects the pair of upper and lower annular portions by providing a gap capable of supporting one end of the rising prevention muscle,
The connecting part is formed at a plurality of locations on the circumference of the annular part, and an assembly for preventing the reinforcing bar from rising. 場所打ち杭の施工時に、杭孔内に建て込んだ鉄筋籠の上昇を防止するため、前記鉄筋籠の下端部に組み付ける鉄筋籠の上昇防止用組付体であって、
前記鉄筋籠の下端中央部から放射状に配置される複数の上昇防止筋と、
前記鉄筋籠の下端中央部で前記複数の上昇防止筋の一端部を支持する支持部材と、
前記複数の上昇防止筋の他端部を前記鉄筋籠に固定する固定用金具とを備え、
前記支持部材が、上下一対の板状部と、前記上昇防止筋の一端部を支持可能な隙間を設けて前記上下一対の板状部を連結する連結部とを備え、
該連結部が、前記板状部の中央部に形成されている、又は前記板状部の周上の複数箇所に形成されていることを特徴とする鉄筋籠の上昇防止用組付体。 In order to prevent the rise of the reinforcing rods built in the pile hole during the construction of the cast-in-place pile, an assembly for preventing the reinforcing rods from being assembled to the lower end of the reinforcing rods,
A plurality of anti-raising bars arranged radially from the lower end central part of the reinforcing bar,
A support member that supports one end of the plurality of anti-raising bars at the lower center of the reinforcing bar,
A fixing bracket for fixing the other end of the plurality of rising prevention bars to the reinforcing bar rod,
The support member includes a pair of upper and lower plate-like portions, and a connecting portion that connects the pair of upper and lower plate-like portions by providing a gap capable of supporting one end of the rising prevention muscle,
The connecting part is formed at the central part of the plate-like part, or is formed at a plurality of locations on the periphery of the plate-like part . 前記複数の上昇防止筋が、前記鉄筋籠の半径よりも短い長さで、かつ前記他端部が折り曲げて形成されたＬ型棒状筋で構成され、
前記固定用金具が、前記鉄筋籠の下端部に配設された補強リングに前記上昇防止筋を固定可能な金具で構成されていることを特徴とする請求項１又は請求項２記載の鉄筋籠の上昇防止用組付体。 The plurality of anti-raising bars are configured with L-shaped bar-shaped bars having a length shorter than the radius of the reinforcing bar and the other end portion is bent.
The fixing bracket, reinforcing bar cage according to claim 1 or claim 2, wherein it is configured the rising anti muscles fixable fitting the reinforcing ring disposed in a lower end portion of the reinforcing bar cage Assembly for prevention of rising. 上記請求項１〜３のいずれかの項に記載した鉄筋籠の上昇防止用組付体が当該鉄筋籠の下端部に組み付けられていることを特徴とする鉄筋籠。 Reinforcing bar scissors, wherein the assembling body for preventing the reinforcing bar scissors according to any one of claims 1 to 3 is assembled to the lower end of the reinforcing bar scissors. ケーシングチューブを地盤に圧入しながら杭孔を形成するオールケーシング工法で場所打ち杭を施工するに際し、
請求項４記載の鉄筋籠を前記杭孔内に建て込む工程と、
前記杭孔内にコンクリートを打ち込む工程と、
該コンクリートの打ち込みと共に前記ケーシングチューブを引き抜き回収する工程とを含むことを特徴とすると場所打ち杭の施工法。 When constructing cast-in-place piles with an all-casing method that forms pile holes while pressing the casing tube into the ground,
Building the reinforcing bar rod according to claim 4 in the pile hole;
Driving concrete into the pile hole;
And a step of drawing and collecting the casing tube together with the concrete driving.
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CN109853568A (en) * 2019-03-22 2019-06-07 深圳宏业基岩土科技股份有限公司 The fit structure of grouting tube and pile body

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CN109853568A (en) * 2019-03-22 2019-06-07 深圳宏业基岩土科技股份有限公司 The fit structure of grouting tube and pile body
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