JP5222565B2 - Steel pipe concrete composite pile and manufacturing method thereof - Google Patents

Steel pipe concrete composite pile and manufacturing method thereof Download PDF

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JP5222565B2
JP5222565B2 JP2008001287A JP2008001287A JP5222565B2 JP 5222565 B2 JP5222565 B2 JP 5222565B2 JP 2008001287 A JP2008001287 A JP 2008001287A JP 2008001287 A JP2008001287 A JP 2008001287A JP 5222565 B2 JP5222565 B2 JP 5222565B2
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JP2009161996A (en
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正明 多田
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前田製管株式会社
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Description

本発明は鋼管コンクリート複合杭に関し、特にフーチング結合用の補強鉄筋を予め杭体内に配設した杭頭接合部を一端側に備えた鋼管コンクリート複合杭及びその製造方法に関する。   The present invention relates to a steel pipe concrete composite pile, and more particularly, to a steel pipe concrete composite pile provided with a pile head joint portion in which a reinforcing bar for footing connection is arranged in advance in a pile body and one end side thereof.

鋼管を外殻とし、該鋼管内にコンクリートを打設して遠心力成形により一体化した鋼管コンクリート複合杭は建築及び土木の分野で広く用いられている。この鋼管コンクリート複合杭を基礎杭として使用した場合、杭とフーチングとを結合する関係上、杭の頭部近傍の鋼管をカットオフした後、コンクリート部分をハツリ取り、杭体内にあって前記鋼管の内側面に予め溶着したフーチング結合用の補強鉄筋を露出せしめるか、或いは鋼管の外周にフーチング結合用補強鉄筋を溶接することで、杭とフーチングとを前記フーチング結合用補強鉄筋を介して結合している。   Steel pipe-concrete composite piles, in which a steel pipe is used as an outer shell, concrete is cast into the steel pipe and integrated by centrifugal force forming, are widely used in the fields of construction and civil engineering. When this steel pipe-concrete composite pile is used as a foundation pile, the steel pipe near the head of the pile is cut off because of the connection between the pile and the footing. Expose the reinforcing reinforcing bar for footing connection welded to the inner surface in advance, or weld the reinforcing reinforcing bar for footing connection to the outer periphery of the steel pipe, and connect the pile and the footing through the reinforcing reinforcing bar for footing connection. Yes.

実開平５ー１０５２８号公報Japanese Utility Model Publication No. 5-10528 特開平５ー２３０８４０号公報JP-A-5-230840 特開２００５ー９３００号公報Japanese Patent Laying-Open No. 2005-9300

しかし、杭とフーチングとの結合作業時において、従来の鋼管コンクリート複合杭にあっては、カットオフ部位の鋼管を切断するための鋼管切断作業ならびにカットオフした鋼管の外周にフーチング結合用の補強鉄筋を溶着するための補強鉄筋溶接作業にそれぞれ多大な時間と労力を必要とするといった諸問題点がある。   However, in the conventional steel pipe-concrete composite pile at the time of joining work between the pile and the footing, the steel pipe cutting work for cutting the steel pipe at the cut-off site and the reinforcing steel bar for joining the footing on the outer periphery of the cut-off steel pipe. There are various problems such as requiring a great amount of time and labor for the reinforcing bar welding work for welding the steel.

本発明は、鋼管コンクリート複合部の一端側に、フーチング結合用の補強鉄筋を埋設したコンクリート製の杭頭接合部を備えた構成、或いは予め設置したフーチング結合用の補強鉄筋を露出せしめた杭頭接合部を備えた構成の鋼管コンクリート複合杭とすることで、基礎杭の施工後、コンクリート製の杭頭接合部を有する杭にあってはカットオフ部位でのコンクリートのハツリ作業を容易にし、或いはフーチング結合用の補強鉄筋を露出せしめた杭頭接合部を有する杭にあってはカットオフ部位でのコンクリートのハツリ作業も不要としたものを提供することを目的としたものである。   The present invention has a structure including a pile head joint made of concrete in which reinforcing reinforcement for footing connection is embedded on one end side of a steel pipe concrete composite part, or a pile head in which a reinforcing reinforcement for footing connection installed in advance is exposed. By making a steel pipe concrete composite pile with a structure with joints, it is easy to crush the concrete at the cut-off site for piles with concrete pile head joints after construction of the foundation pile, or An object of the present invention is to provide a pile having a pile head joint in which a reinforcing steel bar for connecting a footing is exposed, and which eliminates the need for a concrete chipping work at a cut-off site.

上記の目的を達成するため、本願の請求項１に記載の発明は、一端側にコンクリート製の杭頭接合部を、これより他方端まで鋼管コンクリート複合部をそれぞれ形成するとゝもに、前記杭頭接合部から鋼管コンクリート複合部にまたがって配設した複数本のフーチング結合用補強鉄筋を介して、前記コンクリート製の杭頭接合部と鋼管コンクリート複合部とを一体に形成してなる鋼管コンクリート複合杭であって、前記フーチング結合用補強鉄筋はその一端が、前記杭頭接合部のコンクリート内を通って杭頭接合部側の端板に固定され、前記鋼管コンクリート複合部のコンクリート内を延びる他端部は、前記フーチング結合用補強鉄筋に固定した位置決め部材を介して前記鋼管の内周面から所定距離だけ離間した位置にあり、この位置で前記鋼管コンクリート複合部のコンクリートと付着によって固定されていることを特徴とする。 In order to achieve the above object, according to the first aspect of the present invention, when a concrete pile head joint is formed on one end and a steel pipe concrete composite is formed on the other end, the pile is The steel pipe concrete composite formed by integrally forming the concrete pile head joint and the steel pipe concrete composite part through a plurality of reinforcing bars for coupling the footing arranged across the steel pipe concrete composite part from the head joint part. One end of the reinforcing reinforcement for the footing connection is fixed to the end plate on the pile head joint side through the concrete of the pile head joint portion, and extends in the concrete of the steel pipe concrete composite portion. The end portion is located at a position separated from the inner peripheral surface of the steel pipe by a predetermined distance via a positioning member fixed to the reinforcing reinforcement for footing coupling, and at this position, Characterized in that it is fixed by adhering the concrete pipe concrete composite section.

また、上記の目的を達成するため、本願の請求項２に記載の発明は、一端側にフーチング結合用補強鉄筋のみからなる杭頭接合部を、これより他方端まで鋼管コンクリート複合部をそれぞれ形成するとゝもに、前記杭頭接合部から鋼管コンクリート複合部にまたがって配設した前記複数本のフーチング結合用補強鉄筋を介して、該フーチング結合用補強鉄筋が露出した杭頭接合部と鋼管コンクリート複合部とを一体に形成してなる鋼管コンクリート複合杭であって、前記フーチング結合用補強鉄筋はその一端が、前記杭頭接合部側の端板に固定され、前記鋼管コンクリート複合部のコンクリート内を延びる他端部は、前記フーチング結合用補強鉄筋に固定した位置決め部材を介して前記鋼管の内周面から所定距離だけ離間した位置にあり、この位置で前記鋼管コンクリート複合部のコンクリートと付着によって固定されていることを特徴とする。 Moreover, in order to achieve said objective, invention of Claim 2 of this application forms the pile head joint part which consists only of reinforcement reinforcement for footing coupling | bondings at one end side, and a steel pipe concrete composite part from this to the other end, respectively Then , through the plurality of footing coupling reinforcing bars arranged across the steel pipe concrete composite part from the pile head joint part, the pile head joint part and the steel pipe concrete in which the reinforcing reinforcing bars for the footing coupling are exposed. A steel pipe concrete composite pile formed integrally with a composite part, wherein one end of the reinforcing reinforcing rod for footing connection is fixed to an end plate on the pile head joint side, and the inside of the concrete of the steel pipe concrete composite part The other end of the steel pipe is located at a predetermined distance from the inner peripheral surface of the steel pipe via a positioning member fixed to the reinforcing reinforcement for the footing connection. Characterized in that it is fixed by adhering and concrete of the steel concrete composite unit in position.

そして、上記の目的を達成するため、本願の請求項３に記載の発明は上記の鋼管コンクリート複合杭の製造方法であり、断面円形の型枠内を、一端側に杭頭接合部成形空間と、これより他方端まで鋼管コンクリート複合部成形空間とに区画するとゝもに、前記杭頭接合部成形空間から鋼管コンクリート複合部成形空間にまたがって複数本のフーチング結合用補強鉄筋を配設し、前記両空間の内部にコンクリートを投入して遠心成形を行うことで、一端側にコンクリート製の杭頭接合部を有する鋼管コンクリート複合部を一体に形成する鋼管コンクリート複合杭の製造方法であって、前記杭頭接合部成形空間の先端側に設置した端板に前記フーチング結合用補強鉄筋の一端を固定するとゝもに、前記鋼管コンクリート複合部成形空間内を延びる前記フーチング結合用補強鉄筋の他端部に位置決め部材を固定し、遠心成形時において、前記鋼管内のフーチング結合用補強鉄筋が前記鋼管の内周面から前記位置決め部材の高さだけ離間した位置で前記鋼管内のコンクリートに埋設される構成としたことを特徴とする。 And in order to achieve said objective, invention of Claim 3 of this application is a manufacturing method of said steel pipe concrete composite pile, The inside of a circular cross-section formwork is pile head joint part shaping | molding space at one end side, and In addition, when dividing the steel pipe concrete composite part forming space from the other end to the other end, a plurality of reinforcing bars for joining the footing are disposed across the steel pipe concrete composite part forming space from the pile head joint forming part space, A method for producing a steel pipe concrete composite pile that integrally forms a steel pipe concrete composite portion having a concrete pile head joint on one end side by throwing concrete into both spaces and performing centrifugal molding , When one end of the reinforcing reinforcement for the footing connection is fixed to an end plate installed on the front end side of the pile head joint forming space, it extends in the steel pipe concrete composite space. Serial to secure the positioning member to the other end of the footing coupling reinforcing rebar during centrifugal molding, the footing bond reinforcing rebar in the steel pipe is between the release by the height of the positioning member from the inner peripheral surface of the steel pipe position It is set as the structure embed | buried under the concrete in the said steel pipe .

また、上記の目的を達成するため、本願の請求項４に記載の発明は、前記型枠内の一端側に区画した前記杭頭接合部成形空間に、内径が前記鋼管の外径と同一大きさとした内型枠を設置するとゝもに、これより他方端まで鋼管をスペーサを介して前記型枠と同心に固定した鋼管コンクリート複合部成形空間とに区画することで、前記鋼管の外径と同一大きさの外径を有するコンクリート製の杭頭接合部を前記鋼管コンクリート複合部と一体に形成することを特徴とする。 Moreover, in order to achieve said objective, invention of Claim 4 of this application is as follows. The inside diameter is the same as the outer diameter of the said steel pipe in the said pile head joining part shaping | molding space divided on the one end side in the said formwork. When the inner mold frame is installed, the outer diameter of the steel pipe is divided into a steel pipe concrete composite part forming space in which the steel pipe is fixed concentrically with the mold frame through a spacer to the other end. A pile head joint made of concrete having the same outer diameter is formed integrally with the steel pipe concrete composite part .

更に、上記の目的を達成するため、本願の請求項５に記載の発明は、前記型枠内に区画した前記杭頭接合部成形空間と前記鋼管コンクリート複合部成形空間との間にドーナツ型の区画部材を設置し、前記鋼管コンクリート複合部成形空間の内部にのみコンクリートを投入して遠心成形を行うことで、一端側に前記フーチング結合用補強鉄筋が露出した杭頭接合部を、鋼管コンクリート複合部と一体に形成することを特徴とする。 Furthermore, in order to achieve the above object, the invention according to claim 5 of the present application is characterized in that a donut shape is formed between the pile head joint forming space defined in the mold and the steel pipe concrete composite forming space. A partition member is installed, and concrete is poured into the steel pipe concrete composite part forming space and centrifugal forming is performed, so that the pile head joint where the reinforcing reinforcing rod for the footing connection is exposed at one end side is connected to the steel pipe concrete composite part. It is characterized by being formed integrally with the part.

そして更に、上記の目的を達成するため、本願の請求項６に記載の発明は、前記杭頭接合部成形空間の先端側に設置した杭頭接合部側の端板および前記鋼管コンクリート複合部成形空間の後端側に設置した鋼管コンクリート複合部側の端板を前記型枠にそれぞれ固定することで、遠心成形時において、基部を前記杭頭接合部側の端板に溶接等により固定した前記フーチング結合用補強鉄筋が、前記断面円形の型枠の軸心と平行状態を維持し、且つねじれや位置ずれを防止するようにしたことを特徴とするものである。 Furthermore, in order to achieve the above object, the invention according to claim 6 of the present application is the pile head joint side end plate installed on the tip side of the pile head joint forming space and the steel pipe concrete composite part molding. By fixing the end plate on the steel pipe concrete composite part side installed on the rear end side of the space to the mold, respectively, at the time of centrifugal molding, the base was fixed to the end plate on the pile head joint part side by welding or the like The reinforcing reinforcement for footing connection is characterized in that it maintains a state parallel to the axis of the mold having a circular cross section and prevents twisting and displacement .

請求項１に記載した構成の発明とすることで、基礎杭の施工後に、カットオフ部位ではコンクリートのハツリ作業のみを行えばよいので容易であるとゝもに、このコンクリートのハツリ作業により杭体内のフーチング結合用補強鉄筋が露出するから、フーチング結合用補強鉄筋の溶接などの設置作業も不要となる。また、請求項２に記載した構成の発明とすることで、請求項１に係る発明の上記の効果に加えて、基礎杭施工後におけるコンクリートのハツリ作業も不要となる。   According to the invention having the configuration described in claim 1, after the foundation pile is constructed, it is only necessary to perform the concrete chiseling work at the cut-off site. Therefore, installation work such as welding of the reinforcing reinforcement for footing connection becomes unnecessary. Moreover, by setting it as the invention of the structure described in Claim 2, in addition to said effect of the invention which concerns on Claim 1, the chipping | working work of the concrete after foundation pile construction becomes unnecessary.

そして、請求項３に記載した構成の発明とすることで、一端側にコンクリート製の杭頭接合部を有する鋼管コンクリート複合杭を同一の型枠で且つ一度で成形でき、製造効率が向上する。また、請求項４に記載した構成の発明とすることで、全長において径が同一の杭頭接合部を有する鋼管コンクリート複合杭を製造することができ、そして、請求項５に記載の構成の発明とすることで、コンクリートのハツリ作業が全く必要のない杭頭接合部を有する鋼管コンクリート複合杭を、一度の成形で製造することができる。   And by setting it as the invention of the structure described in Claim 3, the steel pipe concrete composite pile which has a pile head junction part made from concrete at one end side can be shape | molded at once with the same moldwork, and manufacturing efficiency improves. Moreover, by setting it as the invention of the structure described in Claim 4, the steel pipe concrete composite pile which has a pile head joint part with the same diameter in the full length can be manufactured, and invention of the structure of Claim 5 By doing so, it is possible to manufacture a steel pipe concrete composite pile having a pile head joint that does not require any concrete scraping work by a single molding.

さらに、請求項６に記載した構成の発明とすることで、遠心力成形による製造時において、杭頭接合部成形空間から鋼管コンクリート複合部成形空間にまたがって配設した複数本のフーチング結合用補強鉄筋はずれることがなく、型枠の中心軸線と平行な状態が保持される。従って、フーチング結合用補強鉄筋は杭頭接合部および鋼管コンクリート複合部のそれぞれ所定位置にずれることなく配設され、品質が均等なものが量産可能となる。   Furthermore, by making it invention of the structure described in Claim 6, the reinforcement for multiple footing coupling | bonding arrange | positioned ranging from the pile head joint part formation space to the steel pipe concrete composite part formation space at the time of manufacture by centrifugal force shaping | molding The rebar does not come off and is kept parallel to the central axis of the formwork. Accordingly, the reinforcing reinforcing bars for the footing connection are arranged without shifting to the predetermined positions of the pile head joint portion and the steel pipe concrete composite portion, respectively, and it is possible to mass-produce those with uniform quality.

以下、本願発明を図面に示す実施例を参照しながら説明する。図において、１は断面が円形の型枠で、その内部は、右側に鋼管コンクリート複合部成形空間Ａ（以下、空間Ａと言う）が、左側に杭頭接合部成形空間Ｂ（以下、空間Ｂと言う）がそれぞれ位置するよう区画されている。２は前記空間Ａ内に設置した鋼管で、その外周側に設置したゴム製等のスペーサ３を介して前記型枠１と同心に配設されており、該鋼管２の右端に装着したドーナツ型の端板４Ａが固定部材５Ａを介して前記型枠１に固定されている。   Hereinafter, the present invention will be described with reference to embodiments shown in the drawings. In the figure, 1 is a mold having a circular cross section, and the inside thereof is a steel pipe concrete composite part forming space A (hereinafter referred to as space A) on the right side and a pile head joint forming space B (hereinafter referred to as space B) on the left side. Are said to be located. 2 is a steel pipe installed in the space A, and is arranged concentrically with the mold 1 via a spacer 3 made of rubber or the like installed on the outer periphery thereof, and is a donut type attached to the right end of the steel pipe 2. The end plate 4A is fixed to the mold 1 via a fixing member 5A.

６は前記空間Ｂ内に設置した内型枠で、前記型枠１の内周面に接着剤等により装着されており、この内型枠６の内径は前記鋼管２の外径と同じ大きさとしたものである。また、前記内型枠６の右端は前記空間Ａと空間Ｂの境界部にあって、前記鋼管２の左端と当接して設置されており、前記空間Ｂの左端側に設置したドーナツ型の端板４Ｂは固定部材５Ｂを介して前記内型枠６に固定されている。   6 is an inner mold installed in the space B, and is attached to the inner peripheral surface of the mold 1 with an adhesive or the like. The inner diameter of the inner mold 6 is the same as the outer diameter of the steel pipe 2. It is a thing. Further, the right end of the inner mold 6 is located at the boundary between the space A and the space B, and is in contact with the left end of the steel pipe 2, and the end of the donut shape installed on the left end side of the space B The plate 4B is fixed to the inner mold 6 via a fixing member 5B.

７はフーチング結合用補強鉄筋で、その左端は前記ドーナツ型の端板４Ｂに溶接により固着されており、その右端側は、前記空間Ｂから空間Ａにまたがって複数本互いに平行に空間Ａ方向に延びている。８は前記フーチング結合用補強鉄筋７に両脚を固定した山形の位置決め金具で、該位置決め金具８の先端は、前記空間Ａにあっては鋼管２の内周面と、前記空間Ｂにあっては前記内型枠６の内周面とそれぞれ当接している。これにより、前記フーチング結合用補強鉄筋７は前記型枠１の軸心と平行となるように設置されている。   Reference numeral 7 denotes a reinforcing bar for connecting a footing, the left end of which is fixed to the doughnut-shaped end plate 4B by welding, and the right end thereof extends from the space B to the space A in parallel with each other in the direction of the space A. It extends. Reference numeral 8 denotes a mountain-shaped positioning fitting in which both legs are fixed to the reinforcing reinforcing bar 7 for coupling the footing. The tip of the positioning fitting 8 is located in the space A, the inner peripheral surface of the steel pipe 2, and the space B. The inner mold 6 abuts on the inner peripheral surface. As a result, the reinforcing reinforcement 7 for the footing connection is installed so as to be parallel to the axis of the mold 1.

９は前記型枠１と同心に配設された環状の位置決め部材で、前記空間Ａと空間Ｂとにまたがって配設した前記フーチング結合用補強鉄筋７の範囲にあって、長手方向に所定間隔毎に複数個設置されている。そして、この環状の位置決め部材９の外周と前記フーチング結合用補強鉄筋７との接触部は溶接などで固定されており、前記位置決め部材９の周方向に所定の間隔で固定された前記複数本のフーチング結合用補強鉄筋７は、それぞれ前記型枠１の軸心と同一方向で且つ互いに平行状態で前記型枠１内に配設されている。   Reference numeral 9 denotes an annular positioning member disposed concentrically with the mold 1, which is within the range of the reinforcing reinforcing bars 7 for the footing connection disposed across the space A and the space B, and has a predetermined interval in the longitudinal direction. Several are installed for each. The contact portion between the outer periphery of the annular positioning member 9 and the reinforcing reinforcing bar 7 for footing connection is fixed by welding or the like, and the plurality of the fixed members fixed at predetermined intervals in the circumferential direction of the positioning member 9. The reinforcing reinforcing bars 7 for the footing connection are respectively arranged in the mold 1 in the same direction as the axis of the mold 1 and in parallel with each other.

そこで、各部材２〜９をそれぞれ図１に示すように設置した型枠１内にコンクリートを投入し、型枠１を回転して遠心成形するが、図２に示すように、前記型枠１内の空間Ａおよび空間Ｂにまたがって前記鋼管２および内型枠６内にコンクリートを投入し、型枠１を回転して遠心力成形することで、図４に示すような鋼管コンクリート複合杭１０Ａ、すなわち、一端側にコンクリート製の杭頭接合部Ｆを、他端側に鋼管コンクリート複合部Ｋをそれぞれ備え、一体化した鋼管コンクリート複合杭１０Ａを成形することができる。   Therefore, concrete is put into a mold 1 in which each of the members 2 to 9 is installed as shown in FIG. 1, and the mold 1 is rotated and centrifugally formed. As shown in FIG. The concrete is put into the steel pipe 2 and the inner mold frame 6 over the inner space A and the inner space B, and the mold 1 is rotated to form a centrifugal force, whereby a steel pipe concrete composite pile 10A as shown in FIG. That is, an integrated steel pipe concrete composite pile 10A can be formed by providing a concrete pile head joint F on one end side and a steel pipe concrete composite part K on the other end side.

そして、図４に示す鋼管コンクリート複合杭１０Ａにあっては、基礎杭の施工後に、杭頭接合部Ｆのカットオフ部位におけるコンクリートをハツルことで、該杭頭接合部Ｆ内に配設した複数本のフーチング結合用補強鉄筋７が露出する。このフーチング結合用補強鉄筋７をフーチング（図示しない）内に埋設することで、鋼管コンクリート複合杭１０Ａとフーチングとを前記フーチング結合用補強鉄筋７を介して結合する。   And in the steel-pipe concrete composite pile 10A shown in FIG. 4, after construction of a foundation pile, the concrete in the cut-off site | part of the pile head joint part F is arranged, and the plurality arrange | positioned in this pile head joint part F is carried out. The reinforcing reinforcing bars 7 for the footing connection are exposed. By embedding this reinforcing reinforcement 7 for footing in a footing (not shown), the steel pipe concrete composite pile 10A and the footing are connected via the reinforcing reinforcement 7 for footing connection.

図３に示すものは、図１に示す型枠１と、該型枠１内の前記空間Ａと空間Ｂとの間にドーナツ型の区画部材Ｃを増設したものである。そして、この型枠１内にコンクリートを投入するに際しては、前記区画部材Ｃにより区画された空間Ａの前記鋼管２内にのみコンクリートを投入し、型枠１を回転して遠心成形することにより、図５に示すような鋼管コンクリート複合杭１０Ｂ、すなわち、一端側にはフーチング結合用補強鉄筋７が露出した杭頭接合部Ｆｂを、他端側に鋼管コンクリート複合部Ｋｂをそれぞれ備え、一体化した鋼管コンクリート複合杭１０Ｂを成形することができる。   3 is obtained by adding a donut-shaped partition member C between the mold 1 shown in FIG. 1 and the space A and the space B in the mold 1. Then, when putting concrete into the mold 1, the concrete is thrown only into the steel pipe 2 in the space A partitioned by the partition member C, and the mold 1 is rotated and centrifugally formed, The steel pipe concrete composite pile 10B as shown in FIG. 5, that is, the pile head joint Fb with the reinforcing reinforcement 7 for footing connection exposed on one end side, and the steel pipe concrete composite portion Kb on the other end side, respectively, are integrated. The steel pipe concrete composite pile 10B can be formed.

そして、この鋼管コンクリート複合杭１０Ｂにあっては、基礎杭の施工後に、杭頭接合部Ｆｂに露出するフーチング結合用補強鉄筋７をフーチング（図示しない）内に埋設することで、鋼管コンクリート複合杭１０Ｂとフーチングとを前記フーチング結合用補強鉄筋７を介して結合する。   And in this steel-pipe concrete composite pile 10B, after construction of a foundation pile, the reinforcement reinforcement 7 for a footing coupling | bonding exposed to the pile head junction part Fb is embed | buried in a footing (not shown), and a steel pipe concrete composite pile 10B and the footing are joined through the reinforcing reinforcement 7 for the footing joint.

本発明で使用する型枠の断面図である。It is sectional drawing of the formwork used by this invention. 同型枠を使用して鋼管コンクリート複合杭を成形する際の断面図である。It is sectional drawing at the time of shape | molding a steel pipe concrete composite pile using the same formwork. 同型枠を使用して他実施形態の鋼管コンクリート複合杭を成形する際の断面図である。It is sectional drawing at the time of shape | molding the steel pipe concrete composite pile of other embodiment using the same formwork. 本発明に係る鋼管コンクリート複合杭の断面図である。It is sectional drawing of the steel pipe concrete composite pile concerning this invention. 本発明に係る他の実施形態に係る鋼管コンクリート複合杭の断面図である。It is sectional drawing of the steel pipe concrete composite pile which concerns on other embodiment which concerns on this invention.

１ 型枠
Ａ 鋼管コンクリート複合部成形空間
Ｂ 杭頭接合部成形空間
Ｃ 区画部材
Ｆ，Ｆｂ 杭頭接合部
Ｋ，Ｋｂ 鋼管コンクリート複合部
２ 鋼管
３ スペーサ
４Ａ，４Ｂ ドーナツ型の端板
５Ａ，５Ｂ 固定部材
６ 内型枠
７ フーチング結合用補強鉄筋
８ 山形の位置決め部材
９ 環状の位置決め部材
１０Ａ，１０Ｂ 鋼管コンクリート複合杭 1 Formwork A Steel pipe concrete composite part forming space B Pile head joint forming space C Partition member F, Fb Pile head joint part K, Kb Steel pipe concrete composite part 2 Steel pipe 3 Spacer 4A, 4B Donut type end plate 5A, 5B Fixed Member 6 Inner form frame 7 Reinforcing bar for footing connection 8 Angle-shaped positioning member 9 Ring-shaped positioning member 10A, 10B Steel pipe concrete composite pile

Claims (6)

一端側にコンクリート製の杭頭接合部を、これより他方端まで鋼管コンクリート複合部をそれぞれ形成するとゝもに、前記杭頭接合部から鋼管コンクリート複合部にまたがって配設した複数本のフーチング結合用補強鉄筋を介して、前記コンクリート製の杭頭接合部と鋼管コンクリート複合部とを一体に形成してなる鋼管コンクリート複合杭であって、前記フーチング結合用補強鉄筋はその一端が、前記杭頭接合部のコンクリート内を通って杭頭接合部側の端板に固定され、前記鋼管コンクリート複合部のコンクリート内を延びる他端部は、前記フーチング結合用補強鉄筋に固定した位置決め部材を介して前記鋼管の内周面から所定距離だけ離間した位置にあり、この位置で前記鋼管コンクリート複合部のコンクリートと付着によって固定されていることを特徴とする鋼管コンクリート複合杭。 When a concrete pile head joint is formed on one end and a steel pipe concrete composite part is formed from the other end to the other end, a plurality of footing joints are arranged from the pile head joint to the steel pipe concrete composite part. A steel pipe concrete composite pile in which the concrete pile head joint and the steel pipe concrete composite part are integrally formed via a reinforcing steel reinforcing bar, wherein the reinforcing reinforcement for footing connection has one end thereof, the pile head The other end extending through the concrete of the steel pipe concrete composite part is fixed to the end plate on the pile head joint part side through the concrete of the joint part, and the positioning part is fixed to the reinforcing reinforcement for the footing connection via the positioning member. It is located at a position away from the inner peripheral surface of the steel pipe by a predetermined distance, and fixed at this position by adhesion with the concrete of the steel pipe concrete composite part. Steel concrete composite piles, wherein are. 一端側にフーチング結合用補強鉄筋のみからなる杭頭接合部を、これより他方端まで鋼管コンクリート複合部をそれぞれ形成するとゝもに、前記杭頭接合部から鋼管コンクリート複合部にまたがって配設した前記複数本のフーチング結合用補強鉄筋を介して、該フーチング結合用補強鉄筋が露出した杭頭接合部と鋼管コンクリート複合部とを一体に形成してなる鋼管コンクリート複合杭であって、前記フーチング結合用補強鉄筋はその一端が、前記杭頭接合部側の端板に固定され、前記鋼管コンクリート複合部のコンクリート内を延びる他端部は、前記フーチング結合用補強鉄筋に固定した位置決め部材を介して前記鋼管の内周面から所定距離だけ離間した位置にあり、この位置で前記鋼管コンクリート複合部のコンクリートと付着によって固定されていることを特徴とする鋼管コンクリート複合杭。 A pile head joint composed only of reinforcing bars for footing connection is formed on one end, and a steel pipe concrete composite part is formed from this to the other end . A steel pipe concrete composite pile formed by integrally forming a pile head joint portion and a steel pipe concrete composite portion where the reinforcing reinforcement for footing connection is exposed via the plurality of reinforcing bars for footing connection, wherein the footing connection One end of the reinforcing reinforcing bar is fixed to the end plate on the pile head joint side, and the other end extending through the concrete of the steel pipe concrete composite portion is positioned via a positioning member fixed to the reinforcing reinforcing bar for the footing connection. The steel pipe is located at a position separated from the inner peripheral surface of the steel pipe by a predetermined distance. At this position, the steel pipe concrete composite part adheres to the concrete. Steel concrete composite piles, characterized in that it is a constant. 断面円形の型枠内を、一端側に杭頭接合部成形空間と、これより他方端まで鋼管コンクリート複合部成形空間とに区画するとゝもに、前記杭頭接合部成形空間から鋼管コンクリート複合部成形空間にまたがって複数本のフーチング結合用補強鉄筋を配設し、前記両空間の内部にコンクリートを投入して遠心成形を行うことで、一端側にコンクリート製の杭頭接合部を有する鋼管コンクリート複合部を一体に形成する鋼管コンクリート複合杭の製造方法であって、前記杭頭接合部成形空間の先端側に設置した端板に前記フーチング結合用補強鉄筋の一端を固定するとゝもに、前記鋼管コンクリート複合部成形空間内を延びる前記フーチング結合用補強鉄筋の他端部に位置決め部材を固定し、遠心成形時において、前記鋼管内のフーチング結合用補強鉄筋が前記鋼管の内周面から前記位置決め部材の高さだけ離間した位置で前記鋼管内のコンクリートに埋設される構成としたことを特徴とする鋼管コンクリート複合杭の製造方法。 When the inside of the circular mold is partitioned into a pile head joint forming space on one end and a steel pipe concrete composite forming space from the other end to the steel pipe concrete composite space, the steel pipe concrete composite portion is separated from the pile head joint forming space. A steel pipe concrete having a concrete pile head joint on one end side by arranging a plurality of reinforcing reinforcements for footing connection across the forming space, throwing concrete into the both spaces and performing centrifugal forming A method for manufacturing a steel pipe concrete composite pile integrally forming a composite part , wherein when one end of the reinforcing reinforcement for footing connection is fixed to an end plate installed on the front end side of the pile head joint forming space, A positioning member is fixed to the other end of the reinforcing reinforcing bar for the footing connection extending in the forming space for the steel pipe concrete composite part, and for the footing connection in the steel pipe at the time of centrifugal forming. Method for producing a steel pipe concrete composite piles strong rebar is characterized by being configured to be embedded in the concrete in the steel pipe at a position between spaced height of the positioning member from the inner peripheral surface of the steel pipe. 前記型枠内の一端側に区画した前記杭頭接合部成形空間に、内径が前記鋼管の外径と同一大きさとした内型枠を設置するとゝもに、これより他方端まで鋼管をスペーサを介して前記型枠と同心に固定した鋼管コンクリート複合部成形空間とに区画することで、前記鋼管の外径と同一大きさの外径を有するコンクリート製の杭頭接合部を前記鋼管コンクリート複合部と一体に形成することを特徴とする請求項３記載の鋼管コンクリート複合杭の製造方法。 When an inner mold having an inner diameter equal to the outer diameter of the steel pipe is installed in the pile head joint forming space partitioned on one end side in the mold, the steel pipe is provided with a spacer to the other end. The steel pipe concrete composite part having the same outer diameter as the outer diameter of the steel pipe by dividing it into a steel pipe concrete composite part forming space fixed concentrically with the formwork through the steel pipe concrete composite part The steel pipe concrete composite pile manufacturing method according to claim 3, wherein the steel pipe concrete composite pile is formed integrally with the steel pipe concrete pile. 前記型枠内に区画した前記杭頭接合部成形空間と前記鋼管コンクリート複合部成形空間との間にドーナツ型の区画部材を設置し、前記鋼管コンクリート複合部成形空間の内部にのみコンクリートを投入して遠心成形を行うことで、一端側に前記フーチング結合用補強鉄筋が露出した杭頭接合部を、鋼管コンクリート複合部と一体に形成することを特徴とする請求項３記載の鋼管コンクリート複合杭の製造方法。 A donut-shaped partition member is installed between the pile head joint forming space and the steel pipe concrete composite part forming space partitioned in the mold, and the concrete is injected only into the steel pipe concrete composite part forming space. 4. The steel pipe concrete composite pile according to claim 3, wherein the pile head joint part in which the reinforcing reinforcement for footing connection is exposed on one end side is integrally formed with the steel pipe concrete composite part by performing centrifugal molding. Production method. 前記杭頭接合部成形空間の先端側に設置した杭頭接合部側の端板および前記鋼管コンクリート複合部成形空間の後端側に設置した鋼管コンクリート複合部側の端板を前記型枠にそれぞれ固定することで、遠心成形時において、基部を前記杭頭接合部側の端板に溶接等により固定した前記フーチング結合用補強鉄筋が、前記断面円形の型枠の軸心と平行状態を維持し、且つねじれや位置ずれを防止するようにしたことを特徴とする請求項３，４又は５記載の鋼管コンクリート複合杭の製造方法。 An end plate on the pile head joint side installed on the leading end side of the pile head joint forming space and an end plate on the steel pipe concrete composite portion side installed on the rear end side of the steel pipe concrete composite part forming space are respectively used as the molds. By fixing, at the time of centrifugal molding, the reinforcing reinforcing bar for the footing connection, in which the base is fixed to the end plate on the pile head joint side by welding or the like, maintains a parallel state with the axis of the circular mold of the cross section. 6. The method of manufacturing a steel pipe concrete composite pile according to claim 3, 4 or 5 , wherein twisting and displacement are prevented .
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