JP2017186832A - Reinforced cage and connection method of reinforced cage - Google Patents
Reinforced cage and connection method of reinforced cage Download PDFInfo
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- JP2017186832A JP2017186832A JP2016077563A JP2016077563A JP2017186832A JP 2017186832 A JP2017186832 A JP 2017186832A JP 2016077563 A JP2016077563 A JP 2016077563A JP 2016077563 A JP2016077563 A JP 2016077563A JP 2017186832 A JP2017186832 A JP 2017186832A
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- 238000000034 method Methods 0.000 title claims abstract description 26
- 230000002093 peripheral effect Effects 0.000 claims abstract description 20
- 238000003780 insertion Methods 0.000 claims abstract description 11
- 230000037431 insertion Effects 0.000 claims abstract description 11
- 230000003014 reinforcing effect Effects 0.000 claims description 266
- 238000009412 basement excavation Methods 0.000 claims description 13
- 229910000831 Steel Inorganic materials 0.000 claims description 2
- 239000010959 steel Substances 0.000 claims description 2
- 229910001294 Reinforcing steel Inorganic materials 0.000 claims 2
- 230000002787 reinforcement Effects 0.000 abstract description 21
- 238000010276 construction Methods 0.000 description 6
- 238000005553 drilling Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 3
- 239000004570 mortar (masonry) Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000004576 sand Substances 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 239000011162 core material Substances 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
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- Piles And Underground Anchors (AREA)
- Reinforcement Elements For Buildings (AREA)
Abstract
Description
本発明は、鉄筋籠及び鉄筋籠の接続方法に関する。 The present invention relates to a reinforcing bar rod and a method for connecting the reinforcing rod rods.
地盤中に杭や柱列壁(地中壁)を構築する際の工法として、例えばＣＦＡ（Continuous Flight Auger）工法が提案されている。この工法は、例えば大口径のオーガー（杭削孔機）で所定深度まで削孔して土砂を排出し、このオーガーを引き上げながら先端からコンクリートやモルタルを注入して打設し、その後、芯材となる鉄筋や型鋼をコンクリートやモルタルの中に挿入して場所打ち杭や柱列壁を構築するというものであり、現場造成で比較的簡単に杭や柱列壁等の杭体を構築できるという利点がある。このＣＦＡ工法では、削孔時に孔壁の崩壊を防ぎかつ孔壁にかかる土圧をオーガーで支持しながら、土砂をコンクリートやモルタルによって削孔内で置換して杭や柱列壁を構築し、排出された土砂を廃棄する。このため、従来の場所打ち杭工法に比べ、大幅に掘削残土を削減することができる。 For example, a CFA (Continuous Flight Auger) method has been proposed as a method for constructing a pile or a column wall (underground wall) in the ground. This method is, for example, drilling to a predetermined depth with a large-diameter auger (pile drilling machine), discharging earth and sand, pouring concrete and mortar from the tip while pulling up this auger, and then core material The cast-in-place piles and column wall are constructed by inserting the reinforcing bars and mold steel into concrete and mortar, and it is possible to construct pile bodies such as piles and column wall relatively easily by site construction There are advantages. In this CFA method, piles and column walls are constructed by replacing earth and sand in the drilling hole with concrete or mortar while preventing the collapse of the hole wall during drilling and supporting the earth pressure on the hole wall with an auger. Discard the discharged sediment. For this reason, compared with the conventional cast-in-place pile construction method, excavation residual soil can be reduced significantly.
ところで、掘削孔内に挿入される鉄筋籠は、予め地上において，適当な長さでかつ円筒形状に加工組み立てられた同一形状の複数の分割鉄筋籠を、順次接続しながら孔内に挿入して行われる。 By the way, the rebar rod inserted into the excavation hole is inserted in the hole while connecting a plurality of divided rebar rods of the same shape that have been processed and assembled into a cylindrical shape on the ground in advance. Done.
上記分割鉄筋籠（下側鉄筋籠、上側鉄筋籠）同士の従来の継手方法は、先に孔内に挿入した下側鉄筋籠に対して、その上端部の継手部分を、孔から上方へ鉛直に突出した状態に、仮置きバー等の仮置き治具で仮置きしておき、次に、挿入する上側鉄筋籠をクレーンで吊って、下側鉄筋籠の鉛直方向で且つ同軸になるように確認しながら上側鉄筋籠を下降させる。 In the conventional joint method between the above-mentioned split reinforcing bar rods (lower reinforcing bar rods, upper reinforcing rod rods), the lower reinforcing bar rods that have been inserted into the hole first, the joint portion at the upper end of the joint is vertically upward from the hole. Temporarily place it with a temporary placement jig such as a temporary placement bar, and then hang the upper rebar rod to be inserted with a crane so that it is coaxial with the lower rebar rod in the vertical direction. Lower the upper rebar bar while checking.
そして、上側鉄筋籠を構成する主筋の下端部分である継手部分を、下側鉄筋籠の継手内に所定長さだけ落とし入れたら下降を停止して、上側鉄筋籠をクレーンで仮吊りしたまま、上下の鉄筋籠相互の通りが正しいかどうか下げ振り等で確認しながら、上下の鉄筋籠同士の継手施工が実施される。その継手施工は、重ね継手が採用されることが多く、上下の鉄筋籠の主筋同士をそれぞれ引き寄せて、その主筋同士が互いに密着するまで太い結束線又はボルト留で緊結する。 And, when dropping the joint part which is the lower end part of the main reinforcing bar that constitutes the upper reinforcing bar rod for a predetermined length into the joint of the lower reinforcing bar rod, the descent is stopped, while the upper reinforcing bar rod is temporarily suspended with a crane, The joint construction between the upper and lower rebar bars is carried out while confirming whether or not the streets between the upper and lower bars are correct. For the joint construction, lap joints are often adopted, and the main bars of the upper and lower reinforcing bar rods are pulled together and are fastened with a thick binding wire or a bolt clamp until the main bars come into close contact with each other.
しかしながら、上述した上下の鉄筋籠の継手方法では、次のような問題がある。すなわち、結束作業、またはボルト留作業による継手箇所が多いため、時間がかかってしまうことがある。また、上下の鉄筋籠の接続時には、クレーンで吊っている上側鉄筋籠が風等で揺れて安定しないことがあるため、鉛直に接続することが難しい場合がある。また、上下の鉄筋籠が接続されたときに、重ね継手長さが確保されているかの管理も必要となる。 However, the above-described upper and lower reinforcing bar joint methods have the following problems. That is, it may take time because there are many joint parts by bundling work or bolt fastening work. In addition, when connecting the upper and lower reinforcing bar rods, the upper reinforcing bar rods suspended by the crane may be unstable due to shaking with the wind or the like, and it may be difficult to connect them vertically. In addition, it is necessary to manage whether the length of the lap joint is secured when the upper and lower rebars are connected.
本発明はこのような課題に鑑みてなされたものであり、その目的は、短時間で容易に上下の鉄筋籠を接続できると共に、重ね継手長さの管理も容易となる鉄筋籠及び鉄筋籠の接続方法を提供することにある。 The present invention has been made in view of such a problem, and the object of the present invention is to provide a reinforcing bar rod and a reinforcing rod rod that can easily connect the upper and lower reinforcing bar rods in a short time and can easily manage the length of the lap joint. It is to provide a connection method.
上記課題を解決するために本発明に係る鉄筋籠は、堀削孔内に先に挿入される下側鉄筋籠と、該下側鉄筋籠に接続される上側鉄筋籠と、を備えた鉄筋籠であって、前記上側鉄筋籠の主筋の下端部外周側の少なくとも２箇所以上に設けられた係合部材と、前記下側鉄筋籠の主筋の上端から重ね継手以上の長さ下げた位置に取り付けられた被係合部材と、を備え、前記上側鉄筋籠の挿入時に、前記係合部材と前記被係合部材とが当接して前記上側鉄筋籠の主筋の下端を径方向へ変位させる傾斜面が、前記係合部材又は前記被係合部材の少なくとも一方に形成され、前記上側鉄筋籠の挿入完了時に、前記上側鉄筋籠の主筋の復元力により該主筋を径方向へ変位させて前記係合部材の上端側と前記被係合部材の下端側とが係合されることを特徴とする。 In order to solve the above-mentioned problems, a reinforcing bar rod according to the present invention includes a lower reinforcing rod rod that is first inserted into the excavation hole and an upper reinforcing rod rod connected to the lower reinforcing rod rod. And at least two engagement members provided on the outer peripheral side of the lower end of the upper reinforcing bar rod and attached to a position lower than the lap joint from the upper end of the lower reinforcing rod rod. An inclined surface that displaces the lower end of the main reinforcing bar of the upper reinforcing bar rod in the radial direction by contacting the engaging member and the engaged member when the upper reinforcing bar rod is inserted. Is formed on at least one of the engaging member or the engaged member, and when the upper reinforcing bar rod is completely inserted, the main bar is displaced in the radial direction by the restoring force of the main reinforcing bar of the upper reinforcing rod bar, and the engagement is performed. The upper end side of the member is engaged with the lower end side of the engaged member.
本発明では、上側鉄筋籠の挿入時に、係合部材と被係合部材とが当接して上側鉄筋籠の主筋の下端を径方向へ変位させる傾斜面が、係合部材又は被係合部材の少なくとも一方に形成され、上側鉄筋籠の挿入完了時に、上側鉄筋籠の主筋の復元力により該主筋を径方向へ変位させて係合部材の上端側と被係合部材の下端側とが係合される。この構成によれば、上側鉄筋籠を降ろし入れる作業のみで、上側鉄筋籠に取り付けられた係合部材が、下側鉄筋籠の被係合部材に係合されて上側鉄筋籠が引張方向に固定されるため、上側鉄筋籠と下側鉄筋籠との接続を短時間で容易に行うことが可能である。また本発明では、下側鉄筋籠の上端から重ね継手以上の長さ下げた位置に被係合部材が取り付けられ、この被係合部材と係合部材とを接続する作業のみで重ね継手長さが確保されるため、工場で予め接続された部材（被係合部材と係合部材）を接続するだけの作業のみで、重ね継手の長さ管理が容易になる。また、部材（被係合部材と係合部材）を精度良く製作していれば上側鉄筋籠と下側鉄筋籠を鉛直に接続することが可能となる。 In the present invention, when the upper reinforcing bar rod is inserted, the inclined surface that makes the engaging member and the engaged member abut and displaces the lower end of the main reinforcing bar of the upper reinforcing bar rod in the radial direction is provided on the engaging member or the engaged member. At the time of completion of insertion of the upper rebar bar, the upper bar side of the engaging member is engaged with the lower end side of the engaged member by displacing the main bar in the radial direction by the restoring force of the main bar of the upper bar bar. Is done. According to this configuration, the engaging member attached to the upper reinforcing bar rod is engaged with the engaged member of the lower reinforcing bar rod and the upper reinforcing bar rod is fixed in the pulling direction only by lowering the upper reinforcing bar rod. Therefore, it is possible to easily connect the upper reinforcing bar rod and the lower reinforcing rod rod in a short time. In the present invention, the engaged member is attached to a position lower than the lap joint from the upper end of the lower reinforcing bar rod, and the lap joint length is obtained only by connecting the engaged member and the engaging member. Therefore, the length management of the lap joint is facilitated only by connecting the members (engaged member and engagement member) that are connected in advance at the factory. Further, if the members (the engaged member and the engaging member) are manufactured with high accuracy, the upper reinforcing bar rod and the lower reinforcing rod rod can be connected vertically.
また上記課題を解決するために本発明に係る鉄筋籠は、堀削孔内に先に挿入される下側鉄筋籠と、該下側鉄筋籠に接続される上側鉄筋籠と、を備えた鉄筋籠であって、前記下側鉄筋籠の主筋の上端部外周側の少なくとも２箇所以上に設けられた係合部材と、前記上側鉄筋籠の主筋の下端から重ね継手以上の長さ上げた位置に取り付けられた被係合部材と、を備え、前記上側鉄筋籠の挿入時に、前記係合部材と前記被係合部材とが当接して前記下側鉄筋籠の主筋の下端を径方向へ変位させる傾斜面が、前記係合部材又は前記被係合部材の少なくとも一方に形成され、前記上側鉄筋籠の挿入完了時に、前記下側鉄筋籠の主筋の復元力により該主筋を径方向へ変位させて前記被係合部材の上端側と前記係合部材の下端側とが係合されることを特徴とする。 In addition, in order to solve the above-mentioned problems, a reinforcing bar rod according to the present invention includes a lower reinforcing rod rod that is first inserted into the excavation hole and an upper reinforcing rod rod connected to the lower reinforcing rod rod. An engagement member provided at at least two places on the outer peripheral side of the upper end of the main reinforcing bar of the lower reinforcing bar rod, and a position raised from the lower end of the main reinforcing rod of the upper reinforcing rod by a length equal to or greater than the lap joint An engaged member attached thereto, and when the upper reinforcing bar rod is inserted, the engaging member and the engaged member come into contact with each other to displace the lower end of the main reinforcing bar of the lower reinforcing rod rod in the radial direction. An inclined surface is formed on at least one of the engaging member and the engaged member, and when the upper reinforcing bar rod is completely inserted, the main reinforcing bar is displaced in the radial direction by the restoring force of the main reinforcing bar of the lower reinforcing rod rod. The upper end side of the engaged member is engaged with the lower end side of the engaging member, That.
また本発明に係る鉄筋籠では、前記被係合部材は、横断面視略円形に間隔をあけて複数配置される前記主筋の外周側に沿って配置される環状の部材であることが好ましい。 Moreover, in the reinforcing bar rod according to the present invention, it is preferable that the engaged member is an annular member arranged along the outer peripheral side of the main reinforcing bars arranged at intervals in a substantially circular shape in cross section.
また本発明に係る鉄筋籠では、前記上側鉄筋籠は、前記係合部材が前記被係合部材の下側に係合されるときに、前記被係合部材の上側に係合される補助係合部材を更に備えることが好ましい。 In the reinforcing bar rod according to the present invention, the upper reinforcing rod rod is an auxiliary member that is engaged with the upper side of the engaged member when the engaging member is engaged with the lower side of the engaged member. It is preferable to further include a joint member.
また本発明に係る鉄筋籠では、前記上側鉄筋籠は、前記被係合部材が前記係合部材の下側に係合されるときに、前記係合部材の上側に係合される補助被係合部材を更に備えることが好ましい。 Further, in the reinforcing bar rod according to the present invention, the upper reinforcing rod rod is an auxiliary hook engaged with the upper side of the engaging member when the engaged member is engaged with the lower side of the engaging member. It is preferable to further include a joint member.
また本発明に係る鉄筋籠では、前記係合部材は、その上端側に下向き内側に傾斜した補助傾斜面を有し、前記上側鉄筋籠の挿入完了時に、前記補助傾斜面と前記被係合部材の下端面とが係合されることが好ましい。 Further, in the reinforcing bar rod according to the present invention, the engaging member has an auxiliary inclined surface inclined downward and inward on the upper end side, and when the insertion of the upper reinforcing bar rod is completed, the auxiliary inclined surface and the engaged member It is preferable that the lower end surface of this is engaged.
また本発明に係る鉄筋籠では、前記係合部材は、その下端側に下向き内側に傾斜した補助傾斜面を有し、前記上側鉄筋籠の挿入完了時に、前記補助傾斜面と前記被係合部材の上端面とが係合されることが好ましい。 Moreover, in the reinforcing bar rod according to the present invention, the engaging member has an auxiliary inclined surface inclined downward and inwardly at a lower end side thereof, and when the upper reinforcing bar rod is completely inserted, the auxiliary inclined surface and the engaged member It is preferable that the upper end surface of this is engaged.
また本発明に係る鉄筋籠の接続方法は、堀削孔内に先に挿入される下側鉄筋籠と、該下側鉄筋籠に接続される上側鉄筋籠と、を備える鉄筋籠の接続方法であって、前記上側鉄筋籠の主筋の下端部外周側の少なくとも２箇所以上に係合部材を取り付け、前記下側鉄筋籠には、その上端から重ね継手以上の長さ下げた位置に被係合部材を取り付け、前記上側鉄筋籠を降ろしたときに、前記係合部材と前記被係合部材とが当接して前記上側鉄筋籠の主筋の下端を径方向へ変位させる傾斜面を、前記係合部材又は前記被係合部材の少なくとも一方に形成し、前記係合部材が前記被係合部材を通過した後、前記上側鉄筋籠の主筋の復元力で径方向に変位することにより、前記係合部材の上端側と前記被係合部材の下端側とが係合する。 Moreover, the connecting method of the reinforcing bar according to the present invention is a connecting method of the reinforcing bar including the lower reinforcing bar to be inserted first into the excavation hole and the upper reinforcing bar to be connected to the lower reinforcing bar. The engaging member is attached to at least two locations on the outer peripheral side of the lower end of the main reinforcing bar of the upper reinforcing bar, and the lower reinforcing bar is engaged at a position lower than the lap joint from its upper end. When the member is attached and the upper reinforcing bar rod is lowered, the engaging surface and the engaged member come into contact with each other, and the inclined surface that displaces the lower end of the main reinforcing bar of the upper reinforcing rod rod in the radial direction is Formed on at least one of the member and the member to be engaged, and after the engagement member passes through the member to be engaged, is displaced in the radial direction by the restoring force of the main reinforcing bar of the upper rebar bar The upper end side of the member is engaged with the lower end side of the engaged member.
かかる方法によれば、上側鉄筋籠を降ろし入れる作業のみで、上側鉄筋籠に取り付けられた係合部材が、下側鉄筋籠の被係合部材に引っ掛かって固定されるので、上側鉄筋籠と下側鉄筋籠の接続を短時間で容易に行うことが可能である。また、被係合部材を、下側鉄筋籠の主筋の上端から重ね継手以上の長さ下げた位置に取り付け、この被係合部材と係合部材とを接続する作業のみで重ね継手長さが確保されるため、工場で予め接続された部材（被係合部材と係合部材）を接続するだけの作業となり、重ね継手の長さ管理も容易となる。また、部材（被係合部材と係合部材）を精度良く製作していれば上側鉄筋籠と下側鉄筋籠を鉛直に接続することが可能となる。 According to such a method, the engaging member attached to the upper reinforcing bar rod is fixed by being hooked on the engaged member of the lower reinforcing bar rod only by lowering the upper reinforcing bar rod. It is possible to easily connect the side reinforcement rods in a short time. In addition, the engaged member is attached to a position lower than the lap joint from the upper end of the main reinforcing bar of the lower reinforcing bar rod, and the lap joint length is obtained only by connecting the engaged member and the engaging member. Since it is ensured, it becomes the operation | work which only connects the member (to-be-engaged member and engagement member) previously connected in the factory, and the length management of a lap joint becomes easy. Further, if the members (the engaged member and the engaging member) are manufactured with high accuracy, the upper reinforcing bar rod and the lower reinforcing rod rod can be connected vertically.
また本発明に係る鉄筋籠の接続方法は、堀削孔内に先に挿入される下側鉄筋籠と、該下側鉄筋籠に接続される上側鉄筋籠と、を備える鉄筋籠の接続方法であって、前記下側鉄筋籠の主筋の上端部外周側の少なくとも２箇所以上に係合部材を取り付け、前記上側鉄筋籠には、その下端から重ね継手以上の長さ上げた位置に被係合部材を取り付け、前記上側鉄筋籠を降ろしたときに、前記係合部材と前記被係合部材とが当接して前記下側鉄筋籠の主筋の下端を径方向へ変位させる傾斜面を、前記係合部材又は前記被係合部材の少なくとも一方に形成し、前記係合部材が前記被係合部材を通過した後、前記下側鉄筋籠の主筋の復元力で径方向に変位することにより、前記被係合部材の上端側と前記係合部材の下端側とが係合する。 Moreover, the connecting method of the reinforcing bar according to the present invention is a connecting method of the reinforcing bar including the lower reinforcing bar to be inserted first into the excavation hole and the upper reinforcing bar to be connected to the lower reinforcing bar. The engagement member is attached to at least two locations on the outer peripheral side of the upper end of the main reinforcing bar of the lower rebar rod, and the upper rebar rod is engaged at a position raised from its lower end by a length longer than the lap joint. When the member is attached and the upper reinforcing bar rod is lowered, the engaging surface and the engaged member come into contact with each other, and an inclined surface for displacing the lower end of the main reinforcing bar of the lower reinforcing rod rod in the radial direction is provided. Formed in at least one of the combined member or the engaged member, and after the engaging member has passed through the engaged member, is displaced in the radial direction by the restoring force of the main reinforcing bar of the lower rebar bar, The upper end side of the engaged member is engaged with the lower end side of the engaging member.
本発明によれば、短時間で容易に上下の鉄筋籠を接続可能であると共に、重ね継手長さの管理も容易となる鉄筋籠及び鉄筋籠の接続方法を提供することができる。 According to the present invention, it is possible to provide a reinforcing bar rod and a connecting method of the reinforcing rod bar that can easily connect the upper and lower reinforcing bar rods in a short time and can easily manage the length of the lap joint.
以下添付図面を参照しながら本発明の実施形態について説明する。尚、以下の好ましい実施形態の説明は、例示に過ぎず、本発明、その適用物或いはその用途を制限することを意図するものではない。 Embodiments of the present invention will be described below with reference to the accompanying drawings. It should be noted that the following description of the preferred embodiment is merely an example, and is not intended to limit the present invention, its application, or its use.
まず、本発明の実施形態における鉄筋籠の構成について説明する。図１は、鉄筋籠の概略構成を示す説明図である。より詳細には、図１（Ａ）は、上側鉄筋籠を下側鉄筋籠に降ろし入れ始めた状態を示す図であり、図１（Ｂ）は、図１（Ａ）よりも更に上側鉄筋籠を降ろし入れた状態を示す図である。 First, the structure of the reinforcing bar rod in the embodiment of the present invention will be described. FIG. 1 is an explanatory diagram showing a schematic configuration of a reinforcing bar rod. More specifically, FIG. 1 (A) is a diagram showing a state in which the upper reinforcing bar rod is started to be lowered into the lower reinforcing rod rod, and FIG. 1 (B) is a further upper reinforcing rod rod than FIG. 1 (A). It is a figure which shows the state which took down.
鉄筋籠１０は、上側鉄筋籠１０ａと下側鉄筋籠１０ｂとを備える。下側鉄筋籠１０ｂは、堀削孔内に予め挿入されており、鉄筋籠１０を建て込む際には、堀削孔内に配置された下側鉄筋籠１０ｂに向けて上側鉄筋籠１０ａを下降させて、下側鉄筋籠１０ｂと上側鉄筋籠１０ａとを接続する。 The reinforcing bar rod 10 includes an upper reinforcing bar rod 10a and a lower reinforcing rod rod 10b. The lower reinforcing bar rod 10b is inserted in the drilling hole in advance, and when the reinforcing bar rod 10 is installed, the upper reinforcing bar rod 10a is lowered toward the lower reinforcing bar rod 10b disposed in the drilling hole. Then, the lower reinforcing bar rod 10b and the upper reinforcing bar rod 10a are connected.
なお、図１に示す鉄筋籠１０を使用した現場打ちコンクリート杭の施工は、所定の地面に掘削機を使用して杭構築用の孔を形成して、その孔内に、地上で予め組み立てた上側鉄筋籠１０ａ及び下側鉄筋籠１０ｂを、順次接続しながら孔内に挿入して建て込み、コンクリートを打設して杭を構築する。 In addition, the construction of the in-situ concrete pile using the reinforcing bar 10 shown in FIG. 1 forms a hole for pile construction using an excavator on a predetermined ground, and is pre-assembled on the ground in the hole. The upper rebar rod 10a and the lower rebar rod 10b are inserted and built into the hole while being sequentially connected, and concrete is placed to construct a pile.
上側鉄筋籠１０ａの構成について説明する。図１に示す上側鉄筋籠１０ａは、複数の主筋１１ａが横断面視略円形に間隔をあけて配置され、帯鉄筋（図示略）を所定間隔に結線や溶接等によって組み付けることで円筒形状に形成される。本実施形態では、複数の主筋１１ａのうち少なくとも２本以上の主筋１１ａの下端部１１ａａ外周側に、板２０（係合部材）が取り付けられている。板２０には、下向き内側方向（図２では右下方向）への傾斜面２１が形成されている。言い換えれば、板２０には、下向き内側方向へのテーパーがつけられている。 The configuration of the upper reinforcing bar rod 10a will be described. The upper reinforcing bar rod 10a shown in FIG. 1 is formed into a cylindrical shape by arranging a plurality of main reinforcing bars 11a at intervals in a substantially circular shape in cross-sectional view, and assembling band reinforcing bars (not shown) at predetermined intervals by connection, welding, or the like. Is done. In the present embodiment, the plate 20 (engaging member) is attached to the outer peripheral side of the lower end portion 11aa of at least two or more main bars 11a among the plurality of main bars 11a. An inclined surface 21 is formed on the plate 20 in the downward inner direction (the lower right direction in FIG. 2). In other words, the plate 20 is tapered downward and inward.
なお、傾斜面２１の角度は、上側鉄筋籠１０ａを降ろしていくときに、円滑に上側鉄筋籠１０ａの主筋１１ａが内側に寄りやすくなる観点から、主筋１１ａの長手方向（図１では上下方向）に対して、例えば１０〜４５°程度であることが好ましい。 In addition, the angle of the inclined surface 21 is the longitudinal direction of the main reinforcing bar 11a (vertical direction in FIG. 1) from the viewpoint that the main reinforcing bar 11a of the upper reinforcing bar rod 10a can be easily moved toward the inside when the upper reinforcing bar rod 10a is lowered. For example, it is preferably about 10 to 45 °.
また、板２０は、図１では全ての主筋１１ａに取り付けられているが、この例に限定されず、主筋１１ａの下端部１１ａａ外周側の少なくとも２箇所以上に設けられていれば良い。好適には、板２０とリング３０がより安定して係合される観点から、横断面視略円形に間隔をおいて配置される複数の主筋１１ａのうち、対向する位置にある主筋１１ａに複数箇所設けることが好ましい。 Moreover, although the board 20 is attached to all the main reinforcements 11a in FIG. 1, it is not limited to this example, What is necessary is just to be provided in at least two places of the lower end part 11aa outer periphery side of the main reinforcement 11a. Preferably, from the viewpoint of more stable engagement of the plate 20 and the ring 30, a plurality of main bars 11a located at opposite positions among a plurality of main bars 11a arranged in a substantially circular shape in cross-sectional view are spaced apart. It is preferable to provide a location.
下側鉄筋籠１０ｂの構成について説明する。図１に示す下側鉄筋籠１０ｂは、横断面視略円形に間隔をあけて配置された複数の主筋１１ｂを有し、この主筋１１ｂの外周に接合された帯鉄筋（図示略）を所定間隔に溶接等によって組み付けることで円筒形状に形成される。下側鉄筋籠１０ｂには、主筋１１ｂの上端１１ｂｂから重ね継手以上の長さ下げた位置にリング３０（被係合部材）が取り付けられている。本実施形態では、リング３０は、横断面視略円形に所定間隔をあけて複数配置される主筋１１ｂの外周側に沿って環状に配置されるものであるが、このような形状に限定されず、板２０と係合可能な機能を有していれば他の形状を選択可能である。 The configuration of the lower reinforcing bar rod 10b will be described. A lower reinforcing bar rod 10b shown in FIG. 1 has a plurality of main reinforcing bars 11b arranged in a substantially circular shape in cross section in a cross section, and a band reinforcing bar (not shown) joined to the outer periphery of the main reinforcing bars 11b is provided at a predetermined interval. It is formed into a cylindrical shape by assembling it with welding or the like. A ring 30 (engaged member) is attached to the lower reinforcing bar rod 10b at a position lower than the upper end 11bb of the main reinforcing bar 11b by a length longer than the lap joint. In the present embodiment, the ring 30 is arranged in a ring shape along the outer peripheral side of the main bars 11b arranged in a substantially circular shape in a cross-sectional view with a predetermined interval, but is not limited to such a shape. Other shapes can be selected as long as they have a function capable of engaging with the plate 20.
なお、上記重ね継手以上の長さは、鉄筋籠１０の条件により適宜設定されるものであるが、例えば公称直径の４５倍以上であることが好ましい。 In addition, although the length beyond the said lap joint is set suitably according to the conditions of the reinforcing bar rod 10, it is preferable that it is 45 times or more of a nominal diameter, for example.
続いて、上述した鉄筋籠１０（上側鉄筋籠１０ａ及び下側鉄筋籠１０ｂ）の接続方法について説明する。図２は、上側鉄筋籠１０ａを下側鉄筋籠１０ｂに向けて降ろしていき、上側鉄筋籠１０ａと下側鉄筋籠１０ｂとを接続する過程を説明するための断面図である。なお、図２（Ａ）は、上側鉄筋籠１０ａの板２０の下端が、下側鉄筋籠１０ｂのリング３０の上端に当接するまで上側鉄筋籠１０ａを降ろしたときの状態を説明するための断面図である。図２（Ｂ）は、上側鉄筋籠１０ａの挿入時を説明するための断面図である。図２（Ｃ）は、上側鉄筋籠１０ａの挿入完了時を説明するための断面図である。 Then, the connection method of the rebar rod 10 (the upper rebar rod 10a and the lower rebar rod 10b) mentioned above is demonstrated. FIG. 2 is a cross-sectional view for explaining the process of lowering the upper reinforcing bar rod 10a toward the lower reinforcing bar rod 10b and connecting the upper reinforcing bar rod 10a and the lower reinforcing bar rod 10b. 2A is a cross-sectional view for explaining a state when the upper reinforcing bar rod 10a is lowered until the lower end of the plate 20 of the upper reinforcing bar rod 10a comes into contact with the upper end of the ring 30 of the lower reinforcing bar rod 10b. FIG. FIG. 2B is a cross-sectional view for explaining when the upper reinforcing bar rod 10a is inserted. FIG. 2C is a cross-sectional view for explaining the completion of the insertion of the upper reinforcing bar rod 10a.
まず、下側鉄筋籠１０ｂを掘削孔内に先に挿入する。次いで、上側鉄筋籠１０ａを、クレーンを使用して吊り上げ、下側鉄筋籠１０ｂに向けて降ろしていく。 First, the lower rebar rod 10b is first inserted into the excavation hole. Next, the upper reinforcing bar rod 10a is lifted using a crane and lowered toward the lower reinforcing bar rod 10b.
上側鉄筋籠１０ａを降ろしていくと、図２（Ａ）に示すように、上側鉄筋籠１０ａの主筋１１ａの下端１１ａａが、リング３０が取り付けられた位置に到達する。言い換えれば、上側鉄筋籠１０ａに取り付けられた板２０の下端が、リング３０の上端に到達する。 When the upper rebar bar 10a is lowered, the lower end 11aa of the main bar 11a of the upper rebar bar 10a reaches the position where the ring 30 is attached, as shown in FIG. In other words, the lower end of the plate 20 attached to the upper reinforcing bar rod 10 a reaches the upper end of the ring 30.
図２（Ａ）に示す状態から更に上側鉄筋籠１０ａを降ろしていくと、図２（Ｂ）に示すように上側鉄筋籠１０ａの板２０に形成された下向き内側に傾斜した傾斜面２１（テーパーがつけられている部分）とリング３０が当接し、上側鉄筋籠１０ａの主筋１１ａの下端１１ａａが径方向内側（図２では右側）に変位する。つまり、上側鉄筋籠１０ａの主筋１１ａが径方向内側に変位した状態で、上側鉄筋籠１０ａが下側鉄筋籠１０ｂに挿入されていく。 When the upper reinforcing bar rod 10a is further lowered from the state shown in FIG. 2 (A), an inclined surface 21 (tapered) that is inclined inward and formed on the plate 20 of the upper reinforcing bar rod 10a as shown in FIG. 2 (B). And the ring 30 are in contact with each other, and the lower end 11aa of the main reinforcing bar 11a of the upper reinforcing bar rod 10a is displaced radially inward (right side in FIG. 2). That is, the upper reinforcing bar rod 10a is inserted into the lower reinforcing bar rod 10b in a state where the main reinforcing bar 11a of the upper reinforcing rod rod 10a is displaced radially inward.
次いで、図２（Ｃ）に示すように、板２０がリング３０を通過した後、上側鉄筋籠１０ａの主筋１１ａの復元力で径方向外側（図２では左側）に広がることにより、板２０の上端部とリング３０の下端部とが当接し、上側鉄筋籠１０ａが上方向（引張方向）に固定される。言い換えれば、上側鉄筋籠１０ａの板２０が下側鉄筋籠１０ｂのリング３０に係合されて、上側鉄筋籠１０ａが上方向（引張方向）に固定される。なお、板２０とリング３０との係合が外れないように、主筋１１ａの内周側に外れ止めリング５０を設けることで、上側鉄筋籠１０ａと下側鉄筋籠１０ｂとの接続をより強固なものとすることができる。また、数カ所の結束またはボルト留をすることにより、円周方向の固定をすることができる。 Next, as shown in FIG. 2 (C), after the plate 20 passes through the ring 30, it spreads radially outward (left side in FIG. 2) by the restoring force of the main reinforcing bar 11a of the upper reinforcing bar rod 10a. An upper end part and the lower end part of the ring 30 contact | abut, and the upper reinforcement bar 10a is fixed to an upper direction (tensile direction). In other words, the plate 20 of the upper reinforcing bar rod 10a is engaged with the ring 30 of the lower reinforcing bar rod 10b, and the upper reinforcing bar rod 10a is fixed in the upward direction (tensile direction). In order to prevent the engagement between the plate 20 and the ring 30, a locking ring 50 is provided on the inner peripheral side of the main reinforcing bar 11 a, thereby further strengthening the connection between the upper reinforcing bar bar 10 a and the lower reinforcing bar bar 10 b. Can be. Moreover, the circumferential direction can be fixed by bundling or bolting in several places.
以上、図２（Ａ）〜図２（Ｃ）に示した、上側鉄筋籠１０ａ及び下側鉄筋籠１０ｂの接続方法によれば、上側鉄筋籠１０ａを降ろし入れる作業のみで、上側鉄筋籠１０ａに取り付けられた板２０が、下側鉄筋籠１０ｂのリング３０に引っ掛かって固定されるので、上側鉄筋籠１０ａと下側鉄筋籠１０ｂの接続を短時間で容易に行うことが可能である。また、リング３０を、下側鉄筋籠１０ｂの主筋１１ｂの上端１１ｂｂから重ね継手以上の長さ下げた位置に取り付け、このリング３０と板２０とを接続する作業のみで重ね継手長さが確保されるため、工場で予め接続されたものを現場で接続するだけの作業となり、重ね継手の長さ管理も容易となる。また、部材（被係合部材と係合部材）を精度良く製作していれば上側鉄筋籠と下側鉄筋籠を鉛直に接続することが可能となる。 As described above, according to the connecting method of the upper reinforcing bar rod 10a and the lower reinforcing rod rod 10b shown in FIGS. 2 (A) to 2 (C), the upper reinforcing bar rod 10a can be moved to the upper reinforcing bar rod 10a only by the work of lowering the upper reinforcing rod rod 10a. Since the attached plate 20 is hooked and fixed on the ring 30 of the lower reinforcing bar rod 10b, the upper reinforcing bar rod 10a and the lower reinforcing bar rod 10b can be easily connected in a short time. Moreover, the lap joint length is secured only by attaching the ring 30 to a position lower than the upper end 11bb of the main bar 11b of the lower reinforcing bar rod 10b by a length longer than the lap joint and connecting the ring 30 and the plate 20. Therefore, it becomes an operation | work which only connects what was connected beforehand in a factory on-site, and the length management of a lap joint becomes easy. Further, if the members (the engaged member and the engaging member) are manufactured with high accuracy, the upper reinforcing bar rod and the lower reinforcing rod rod can be connected vertically.
なお、本発明における「上側鉄筋籠の挿入時」とは、板２０の下端がリング３０の上端に当接してから上側鉄筋籠１０ａを更に降ろしていき、上側鉄筋籠１０ａと下側鉄筋籠１０ｂとが接続されて上側鉄筋籠１０ａが少なくとも引張方向（上方向）に固定されるまでの間をいう。 In the present invention, “when the upper reinforcing bar rod is inserted” means that the upper reinforcing bar rod 10a is further lowered after the lower end of the plate 20 contacts the upper end of the ring 30, and the upper reinforcing bar rod 10a and the lower reinforcing bar rod 10b. Until the upper rebar bar 10a is fixed at least in the tension direction (upward direction).
また、本発明における「上側鉄筋籠の挿入完了時」とは、板２０がリング３０に係合されて、上側鉄筋籠１０ａが少なくとも引張方向（上方向）に固定された状態をいう。 In the present invention, “when the insertion of the upper reinforcing bar rod is completed” refers to a state in which the plate 20 is engaged with the ring 30 and the upper reinforcing bar rod 10a is fixed at least in the tension direction (upward direction).
上述した板２０に加えて、板２０の上端側がリング３０の下端側に当接したときに（板２０とリング３０とが係合したときに）、リング３０の上端側に当接するように配置される補助板４０（図３（Ｃ）参照）を設けても良い。これにより、上側鉄筋籠１０ａの挿入完了時には、板２０及び補助板４０がリング３０に係合されるので、上側鉄筋籠１０ａ及び下側鉄筋籠１０ｂが軸方向（図２では上下方向）に固定され、上側鉄筋籠１０ａと下側鉄筋籠１０ｂとの接続をより強固なものとすることができる。 In addition to the plate 20 described above, when the upper end side of the plate 20 comes into contact with the lower end side of the ring 30 (when the plate 20 and the ring 30 are engaged), the plate 20 is arranged to come into contact with the upper end side of the ring 30. An auxiliary plate 40 (see FIG. 3C) may be provided. Accordingly, when the insertion of the upper reinforcing bar rod 10a is completed, the plate 20 and the auxiliary plate 40 are engaged with the ring 30, so that the upper reinforcing bar rod 10a and the lower reinforcing bar rod 10b are fixed in the axial direction (vertical direction in FIG. 2). Thus, the connection between the upper reinforcing bar rod 10a and the lower reinforcing bar rod 10b can be made stronger.
図２に示す板２０の形状としては、図示した例（台形）に限定されるわけではなく、例えば、図３（Ａ）に示すように、板２０の形状を三角形としても良い。また、図３（Ｂ）に示すように、板２０Ｂの上端側に、下向き内側（図３では右下）に傾斜した補助傾斜面２２を形成し、当該補助傾斜面２２に対応するように形成された、下向き内側に傾斜した下端面を有するリング３０Ｂに引っ掛ける構造としても良い。言い換えれば、板２０Ｂの上端側及びリング３０Ｂの下端側の両方にテーパーをつけて、このテーパーをつけた部分同士を係合するようにしても良い。このような構成とすることによって、上側鉄筋籠１０ａを、引張方向（上方向）により安定して固定することができる。 The shape of the plate 20 shown in FIG. 2 is not limited to the illustrated example (trapezoid). For example, as shown in FIG. 3A, the shape of the plate 20 may be a triangle. Further, as shown in FIG. 3B, an auxiliary inclined surface 22 that is inclined inwardly (lower right in FIG. 3) is formed on the upper end side of the plate 20B, and is formed so as to correspond to the auxiliary inclined surface 22. It is good also as a structure hooked on the ring 30B which has the lower end surface inclined downward and made inside. In other words, both the upper end side of the plate 20B and the lower end side of the ring 30B may be tapered, and the tapered portions may be engaged with each other. By setting it as such a structure, the upper reinforcement bar | burr 10a can be stably fixed by a tension | pulling direction (upward direction).
以上、具体例を参照しつつ本発明の実施形態について説明した。しかし、本発明はこれらの具体例に限定されるものではない。 The embodiments of the present invention have been described above with reference to specific examples. However, the present invention is not limited to these specific examples.
例えば上述した実施形態では、板２０（係合部材）に、上側鉄筋籠１０ａの挿入時において、板とリング３０（被係合部材）とが当接して上側鉄筋籠１０ａの主筋１１ａの下端１１ａａを径方向内側（図２では右側）へ変位させる傾斜面２１が形成されているが、このような傾斜面２１をリング３０に形成しても良い（すなわち、板２０のみ又はリング３０のみに傾斜面２１を形成しても良いし、板２０とリング３０の双方に傾斜面２１を形成しても良い）。 For example, in the above-described embodiment, when the upper reinforcing bar rod 10a is inserted into the plate 20 (engaging member), the plate and the ring 30 (engaged member) come into contact with each other, and the lower end 11aa of the main reinforcing bar 11a of the upper reinforcing rod rod 10a. 2 is formed on the ring 30 (that is, only the plate 20 or only the ring 30 is inclined). The surface 21 may be formed, or the inclined surface 21 may be formed on both the plate 20 and the ring 30).
また上述した実施形態では、上側鉄筋籠１０ａの主筋１１ａの下端１１ａａを径方向内側へ変位させる傾斜面２１を板２０に形成していたが、主筋１１ａの下端１１ａａを径方向外側へ変位させる傾斜面を板２０に形成し、このような傾斜面を利用して板２０とリング３０とを係合するように構成しても良い。また、このような傾斜面を、板２０とリング３０の双方に形成しても良く、板２０のみ又はリング３０のみに形成しても良い。 Moreover, in embodiment mentioned above, although the inclined surface 21 which displaces the lower end 11aa of the main reinforcement 11a of the upper reinforcing bar rod 10a to radial inside is formed in the board 20, the inclination which displaces the lower end 11aa of main reinforcement 11a to radial outside. A surface may be formed on the plate 20 and the plate 20 and the ring 30 may be engaged with each other using such an inclined surface. Such an inclined surface may be formed on both the plate 20 and the ring 30, or may be formed only on the plate 20 or only on the ring 30.
また上述した実施形態では、板２０を上側鉄筋籠１０ａの主筋１１ａの外周側、リング３０を下側鉄筋籠１０ｂの主筋１１ｂの外周側に取り付けているが、例えば、板２０を主筋１１ａの内周側、リング３０を主筋１１ｂの内周側に取り付け、上側鉄筋籠１０ａを降ろしたときに、板２０又はリング３０の少なくとも一方に形成した傾斜面を利用して、板２０とリング３０とを係合するようにしても良い。 Moreover, in embodiment mentioned above, although the board 20 is attached to the outer peripheral side of the main reinforcement 11a of the upper reinforcement bar 10a, and the ring 30 is attached to the outer peripheral side of the main reinforcement 11b of the lower reinforcement bar 10b, for example, the board 20 is attached to the inner side of the main reinforcement 11a. When the ring 30 is attached to the inner peripheral side of the main bar 11b and the upper reinforcing bar rod 10a is lowered, the plate 20 and the ring 30 are joined using the inclined surface formed on at least one of the plate 20 or the ring 30. You may make it engage.
また上述した実施形態では、リング３０を環状の部材としているが、本発明における被係合部材としてはこの例に限定されない。すなわち、本発明における被係合部材は、例えば、板２０が取り付けられた位置に対応するように、下側鉄筋籠１０ｂの主筋１１ｂに取り付けられた板状の部材であっても良い。その他、上側鉄筋籠１０ａを下側鉄筋籠１０ｂに向けて降ろしたときに、板２０と被係合部材とを当接させて、上側鉄筋籠１０ａの主筋１１ａの下端を変位可能な機能を有していれば、本発明における被係合部材としては、他の様々な形状を選択することが可能である。 In the embodiment described above, the ring 30 is an annular member, but the engaged member in the present invention is not limited to this example. That is, the engaged member in the present invention may be a plate-like member attached to the main reinforcement 11b of the lower reinforcing bar rod 10b so as to correspond to the position where the plate 20 is attached, for example. In addition, when the upper reinforcing bar rod 10a is lowered toward the lower reinforcing bar rod 10b, the plate 20 and the member to be engaged are brought into contact with each other and the lower end of the main reinforcing bar 11a of the upper reinforcing bar rod 10a can be displaced. If so, various other shapes can be selected as the engaged member in the present invention.
また上述した実施形態では、板２０に、下向き内側（図２では右下）に傾斜した傾斜面２１が形成されているが、傾斜面２１の形態はこれに限定されない。例えば、下向き外側に傾斜した傾斜面を板２０に形成し、上側鉄筋籠１０ａを降ろしたときに、当該傾斜面とリング３０とが当接して上側鉄筋籠１０ａの主筋１１ａの下端１１ａａを径方向外側へ変位させるようにし、板２０がリング３０を通過した後、主筋１１ａの復元力で径方向内側へ変位させて上側鉄筋籠１０ａが引張方向に固定されるようにしても良い。 In the above-described embodiment, the inclined surface 21 inclined to the inner side (lower right in FIG. 2) is formed on the plate 20, but the form of the inclined surface 21 is not limited to this. For example, when the inclined surface inclined downward outward is formed on the plate 20 and the upper reinforcing bar rod 10a is lowered, the inclined surface and the ring 30 come into contact with each other so that the lower end 11aa of the main reinforcing bar 11a of the upper reinforcing rod rod 10a is in the radial direction. The upper reinforcing bar rod 10a may be fixed in the pulling direction by displacing outward, and after the plate 20 passes through the ring 30, it is displaced radially inward by the restoring force of the main reinforcing bar 11a.
加えて、上述した実施形態では、上側鉄筋籠１０ａに板２０（係合部材）を設け、下側鉄筋籠１０ｂにリング３０（被係合部材）を設けたが、上下逆の構成（上側鉄筋籠１０ａに被係合部材、下側鉄筋籠１０ｂに係合部材を設けた構成）としても良い。具体的には、本実施形態では、堀削孔内に先に挿入される下側鉄筋籠１０ｂと、該下側鉄筋籠１０ｂに接続される上側鉄筋籠１０ａと、を備えた鉄筋籠１０は、下側鉄筋籠１０ｂの主筋１１ｂの上端部外周側の少なくとも２箇所以上に設けられた係合部材と、上側鉄筋籠１０ａの主筋１１ａの下端から重ね継手以上の長さ上げた位置に取り付けられた被係合部材と、を備え、上側鉄筋籠１０ａの挿入時に、係合部材と被係合部材とが当接して下側鉄筋籠１０ｂの主筋１１ｂの下端を径方向へ変位させる傾斜面が、係合部材又は被係合部材の少なくとも一方に形成され、上側鉄筋籠１０ａの挿入完了時に、下側鉄筋籠１０ｂの主筋１１ｂの復元力により該主筋１１ｂを径方向へ変位させて被係合部材の上端側と係合部材の下端側とが係合される構成としても良い。このような上下逆の構成としても、上述した効果と同様の効果を奏することができる。 In addition, in the above-described embodiment, the upper reinforcing bar rod 10a is provided with the plate 20 (engaging member) and the lower reinforcing bar rod 10b is provided with the ring 30 (engaged member). The engagement member may be provided on the flange 10a, and the engagement member may be provided on the lower reinforcing bar flange 10b). Specifically, in this embodiment, the reinforcing bar rod 10 including the lower reinforcing bar rod 10b that is inserted first into the excavation hole and the upper reinforcing rod rod 10a connected to the lower reinforcing bar rod 10b is as follows. And at least two engaging members provided on the outer peripheral side of the upper end of the main reinforcing bar 11b of the lower reinforcing bar rod 10b and a position that is higher than the lap joint from the lower end of the main reinforcing bar 11a of the upper reinforcing bar rod 10a. An inclined surface that displaces the lower end of the main reinforcing bar 11b of the lower reinforcing bar rod 10b in the radial direction when the engaging member and the engaged member are in contact with each other when the upper reinforcing bar rod 10a is inserted. Formed on at least one of the engaging member and the engaged member, and when the upper reinforcing bar rod 10a is completely inserted, the main reinforcing bar 11b is displaced in the radial direction by the restoring force of the main reinforcing rod 11b of the lower reinforcing bar rod 10b. The upper end side of the member is engaged with the lower end side of the engaging member. It may be formed. Even with such an upside-down configuration, the same effects as described above can be achieved.
また上述した上下逆の構成（上側鉄筋籠１０ａに被係合部材、下側鉄筋籠１０ｂに係合部材を設けた構成）において、被係合部材は、横断面視略円形に間隔をあけて複数配置される上側鉄筋籠１０ａの主筋１１ａの外周側に沿って配置される環状の部材であっても良い。 Further, in the above-described upside down configuration (the configuration in which the engaged member is provided on the upper reinforcing bar rod 10a and the engaging member is provided on the lower reinforcing rod rod 10b), the engaged members are spaced substantially circular in cross section. It may be an annular member arranged along the outer peripheral side of the main reinforcing bar 11a of the plurality of upper reinforcing bar rods 10a.
また上述した上下逆の構成（上側鉄筋籠１０ａに被係合部材、下側鉄筋籠１０ｂに係合部材を設けた構成）において、上側鉄筋籠１０ａは、被係合部材が係合部材の下側に係合されるときに、係合部材の上側に係合される補助被係合部材を更に備えても良い。 Further, in the above-described configuration upside down (the configuration in which the engaged member is provided on the upper reinforcing bar rod 10a and the engaging member is provided on the lower reinforcing rod rod 10b), the upper reinforcing bar rod 10a has the engaged member below the engaging member. You may further provide the auxiliary | assistant to-be-engaged member engaged with the upper side of an engagement member, when engaged with a side.
また上述した上下逆の構成（上側鉄筋籠１０ａに被係合部材、下側鉄筋籠１０ｂに係合部材を設けた構成）において、係合部材は、その下端側に下向き内側に傾斜した補助傾斜面を有し、上側鉄筋籠１０ａの挿入完了時に、補助傾斜面と被係合部材の上端面とが係合されても良い。 Further, in the above-described upside down configuration (configuration in which the upper rebar rod 10a has an engaged member and the lower rebar rod 10b has an engagement member), the engaging member is an auxiliary inclination inclined downward and inward on the lower end side thereof. The auxiliary inclined surface and the upper end surface of the engaged member may be engaged when the insertion of the upper reinforcing bar rod 10a is completed.
また上述した上下逆の構成（上側鉄筋籠１０ａに被係合部材、下側鉄筋籠１０ｂに係合部材を設けた構成）における鉄筋籠１０の接続方法では、堀削孔内に先に挿入される下側鉄筋籠１０ｂと、該下側鉄筋籠１０ｂに接続される上側鉄筋籠１０ａと、を備える鉄筋籠１０の接続方法であって、下側鉄筋籠１０ｂの主筋１１ｂの上端部外周側の少なくとも２箇所以上に係合部材を取り付け、上側鉄筋籠１０ａには、その下端から重ね継手以上の長さ上げた位置に被係合部材を取り付け、上側鉄筋籠１０ａを降ろしたときに、係合部材と被係合部材とが当接して下側鉄筋籠１０ｂの主筋１１ｂの下端を径方向へ変位させる傾斜面を、係合部材又は被係合部材の少なくとも一方に形成し、係合部材が被係合部材を通過した後、下側鉄筋籠１０ｂの主筋１１ｂの復元力で径方向に変位することにより、被係合部材の上端側と係合部材の下端側とが係合する。このような上下逆の構成における鉄筋籠１０の接続方法においても、上述した鉄筋籠１０の接続方法における効果と同様の効果を奏することができる。 Further, in the above-described upside-down configuration (configuration in which the upper rebar rod 10a is provided with an engaged member and the lower rebar rod 10b is provided with an engaging member), the reinforcing bar rod 10 is inserted first into the excavation hole. The rebar rod 10b is provided with a lower rebar rod 10b and an upper rebar rod 10a connected to the lower rebar rod 10b, and is on the outer peripheral side of the upper end of the main bar 11b of the lower rebar rod 10b. Engagement members are attached to at least two or more locations, and the upper rebar rod 10a is engaged when a member to be engaged is attached at a position higher than the lap joint from its lower end and the upper rebar rod 10a is lowered. An inclined surface is formed on at least one of the engaging member and the engaged member so that the member and the engaged member come into contact with each other and the lower end of the main reinforcing bar 11b of the lower reinforcing bar rod 10b is displaced in the radial direction. After passing through the engaged member, the main part of the lower reinforcing bar rod 10b By radially displaced by the restoring force of 11b, and the lower end of the upper side and the engaging member of the engaged member is engaged. Also in the connection method of the reinforcing bar rod 10 in such an upside down configuration, the same effect as the effect of the connecting method of the reinforcing bar rod 10 described above can be achieved.
上述した具体例に、当業者が適宜設計変更を加えたものも、本発明の特徴を備えている限り、本発明の範囲に包含される。前述した各具体例が備える各要素およびその配置、材料、条件、形状、サイズなどは、例示したものに限定されるわけではなく適宜変更することができる。 Those in which those skilled in the art appropriately modify the design of the above-described specific examples are also included in the scope of the present invention as long as they have the characteristics of the present invention. Each element included in each of the specific examples described above and their arrangement, material, condition, shape, size, and the like are not limited to those illustrated, and can be appropriately changed.
１０：鉄筋籠
１０ａ：上側鉄筋籠
１０ｂ：下側鉄筋籠
１１ａ：主筋
１１ｂ：主筋
２０：板（係合部材）
２１：傾斜面
２２：補助傾斜面
３０：リング（被係合部材）
４０：補助板（補助係合部材）
10: Rebar bar 10a: Upper bar bar 10b: Lower bar bar 11a: Main bar 11b: Main bar 20: Plate (engaging member)
21: inclined surface 22: auxiliary inclined surface 30: ring (engaged member)
40: Auxiliary plate (auxiliary engagement member)
Claims (9)
前記上側鉄筋籠の主筋の下端部外周側の少なくとも２箇所以上に設けられた係合部材と、
前記下側鉄筋籠の主筋の上端から重ね継手以上の長さ下げた位置に取り付けられた被係合部材と、を備え、
前記上側鉄筋籠の挿入時に、前記係合部材と前記被係合部材とが当接して前記上側鉄筋籠の主筋の下端を径方向へ変位させる傾斜面が、前記係合部材又は前記被係合部材の少なくとも一方に形成され、
前記上側鉄筋籠の挿入完了時に、前記上側鉄筋籠の主筋の復元力により該主筋を径方向へ変位させて前記係合部材の上端側と前記被係合部材の下端側とが係合されることを特徴とする鉄筋籠。 Reinforcing bar scissors provided with a lower reinforcing bar scissors inserted first into the excavation hole and an upper reinforcing steel scissors connected to the lower rebar scissors,
Engagement members provided at least two locations on the outer peripheral side of the lower end of the main reinforcing bar of the upper reinforcing bar,
An engaged member attached at a position lower than the lap joint from the upper end of the main reinforcing bar of the lower rebar bar,
An inclined surface that causes the engaging member and the engaged member to come into contact with each other when the upper reinforcing bar rod is inserted to displace the lower end of the main reinforcing bar of the upper reinforcing bar rod in the radial direction is the engaging member or the engaged member. Formed on at least one of the members,
Upon completion of the insertion of the upper rebar bar, the upper bar side of the engagement member is engaged with the lower end side of the engaged member by displacing the main bar in the radial direction by the restoring force of the main bar of the upper bar bar Reinforced rod that is characterized by that.
前記下側鉄筋籠の主筋の上端部外周側の少なくとも２箇所以上に設けられた係合部材と、
前記上側鉄筋籠の主筋の下端から重ね継手以上の長さ上げた位置に取り付けられた被係合部材と、を備え、
前記上側鉄筋籠の挿入時に、前記係合部材と前記被係合部材とが当接して前記下側鉄筋籠の主筋の下端を径方向へ変位させる傾斜面が、前記係合部材又は前記被係合部材の少なくとも一方に形成され、
前記上側鉄筋籠の挿入完了時に、前記下側鉄筋籠の主筋の復元力により該主筋を径方向へ変位させて前記被係合部材の上端側と前記係合部材の下端側とが係合されることを特徴とする鉄筋籠。 Reinforcing bar scissors provided with a lower reinforcing bar scissors inserted first into the excavation hole and an upper reinforcing steel scissors connected to the lower rebar scissors,
Engagement members provided in at least two locations on the outer peripheral side of the upper end of the main reinforcing bar of the lower rebar,
An engaged member attached at a position where the length of the upper reinforcing bar is higher than the lap joint from the lower end of the main reinforcing bar,
An inclined surface that causes the engaging member and the engaged member to abut and displace the lower end of the main reinforcing bar of the lower reinforcing bar rod in the radial direction when the upper reinforcing bar rod is inserted is the engaging member or the engaged member. Formed on at least one of the joint members,
When the insertion of the upper reinforcing bar rod is completed, the main bar is displaced in the radial direction by the restoring force of the main bar of the lower reinforcing bar rod so that the upper end side of the engaged member and the lower end side of the engaging member are engaged. Reinforced steel rod characterized by that.
前記上側鉄筋籠の挿入完了時に、前記補助傾斜面と前記被係合部材の下端面とが係合される請求項１、３又は４のいずれか１項に記載の鉄筋籠。 The engaging member has an auxiliary inclined surface inclined downward and inward on the upper end side thereof,
5. The reinforcing bar rod according to claim 1, wherein the auxiliary inclined surface and the lower end surface of the engaged member are engaged when the insertion of the upper reinforcing bar rod is completed.
前記上側鉄筋籠の挿入完了時に、前記補助傾斜面と前記被係合部材の上端面とが係合される請求項２、３又は５のいずれか１項に記載の鉄筋籠。 The engaging member has an auxiliary inclined surface inclined downward and inward at the lower end side thereof,
6. The reinforcing bar rod according to claim 2, wherein the auxiliary inclined surface and the upper end surface of the engaged member are engaged when the insertion of the upper reinforcing bar rod is completed.
前記上側鉄筋籠の主筋の下端部外周側の少なくとも２箇所以上に係合部材を取り付け、
前記下側鉄筋籠には、その上端から重ね継手以上の長さ下げた位置に被係合部材を取り付け、
前記上側鉄筋籠を降ろしたときに、前記係合部材と前記被係合部材とが当接して前記上側鉄筋籠の主筋の下端を径方向へ変位させる傾斜面を、前記係合部材又は前記被係合部材の少なくとも一方に形成し、
前記係合部材が前記被係合部材を通過した後、前記上側鉄筋籠の主筋の復元力で径方向に変位することにより、前記係合部材の上端側と前記被係合部材の下端側とが係合することを特徴とする鉄筋籠の接続方法。 A rebar rod connection method comprising: a lower rebar rod that is inserted first into the excavation hole; and an upper rebar rod connected to the lower rebar rod,
An engagement member is attached to at least two places on the outer peripheral side of the lower end portion of the main reinforcing bar of the upper rebar,
In the lower rebar bar, an engaged member is attached at a position lower than the lap joint from its upper end,
When the upper reinforcing bar rod is lowered, an inclined surface that causes the engaging member and the engaged member to come into contact with each other to displace the lower end of the main reinforcing bar of the upper reinforcing bar rod in the radial direction is provided on the engaging member or the covered member. Formed on at least one of the engaging members,
After the engagement member passes through the engaged member, the upper end side of the engagement member and the lower end side of the engaged member are displaced in the radial direction by the restoring force of the main reinforcing bar of the upper rebar bar A method for connecting reinforcing bar rods, wherein
前記下側鉄筋籠の主筋の上端部外周側の少なくとも２箇所以上に係合部材を取り付け、
前記上側鉄筋籠には、その下端から重ね継手以上の長さ上げた位置に被係合部材を取り付け、
前記上側鉄筋籠を降ろしたときに、前記係合部材と前記被係合部材とが当接して前記下側鉄筋籠の主筋の下端を径方向へ変位させる傾斜面を、前記係合部材又は前記被係合部材の少なくとも一方に形成し、
前記係合部材が前記被係合部材を通過した後、前記下側鉄筋籠の主筋の復元力で径方向に変位することにより、前記被係合部材の上端側と前記係合部材の下端側とが係合することを特徴とする鉄筋籠の接続方法。 A rebar rod connection method comprising: a lower rebar rod that is inserted first into the excavation hole; and an upper rebar rod connected to the lower rebar rod,
Attach engagement members to at least two locations on the outer peripheral side of the upper end of the main reinforcing bar of the lower rebar bar,
In the upper rebar bar, a member to be engaged is attached at a position where the length of the lap joint is increased from the lower end,
When the upper reinforcing bar rod is lowered, an inclined surface that causes the engaging member and the engaged member to come into contact with each other to displace the lower end of the main reinforcing bar of the lower reinforcing rod rod in the radial direction is the engaging member or the Formed on at least one of the engaged members,
After the engaging member passes through the engaged member, the upper end side of the engaged member and the lower end side of the engaging member are displaced in the radial direction by the restoring force of the main reinforcing bar of the lower rebar bar A method for connecting reinforcing bar rods, wherein
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP7406076B2 (en) | 2019-11-25 | 2023-12-27 | ジャパンパイル株式会社 | Rebar cage connection for cast-in-place piles |
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| JP6677564B2 (en) | 2020-04-08 |
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