JP6710042B2 - Steel column and pile joint structure - Google Patents

Steel column and pile joint structure Download PDF

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JP6710042B2
JP6710042B2 JP2015226147A JP2015226147A JP6710042B2 JP 6710042 B2 JP6710042 B2 JP 6710042B2 JP 2015226147 A JP2015226147 A JP 2015226147A JP 2015226147 A JP2015226147 A JP 2015226147A JP 6710042 B2 JP6710042 B2 JP 6710042B2
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pile
steel column
steel
column
connecting member
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JP2017095888A (en
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靖久 武藤
靖久 武藤
浩之 竹本
浩之 竹本
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Taisei Corp
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Description

本発明は、例えば、鋼製柱と鉄筋コンクリート造の杭頭部を有する杭との接合部構造に関する。 The present invention relates to, for example, a joint structure between a steel column and a pile having a reinforced concrete pile head.

従来より、鉄骨柱と杭との接合部構造として、鉄骨柱と杭との間に連結部材（仮設支持部材）を設けることが提案されている（特許文献１参照）。
特許文献１では、仮設支持部材の上端は、鉄骨柱にボルト固定され、仮設支持部材の下端は、杭頭部に溶接固定された接合プレートにボルト固定される。また、杭頭面の下方
から鉄骨柱の下端面よりも上方に至るまで基礎フーチングが設けられ、基礎フーチングを構成する縦筋は、杭頭面の下方から鉄骨柱の下端面の上方まで密に配筋されている。 Conventionally, it has been proposed to provide a connecting member (temporary support member) between the steel column and the pile as a joint structure between the steel column and the pile (see Patent Document 1).
In Patent Document 1, the upper end of the temporary support member is bolted to the steel column, and the lower end of the temporary support member is bolted to a joint plate welded to the pile head. In addition, a foundation footing is provided from below the pile head surface to above the lower end surface of the steel column, and the vertical streaks that make up the foundation footing are densely arranged from below the pile head surface to above the lower end surface of the steel column. It is arranged.

特許文献２には、柱脚基礎コンクリートの内部に、定着板に連結したアンカーボルトを打ち込んで、これにより、アンカーボルトの引抜き耐力を確保することが示されている。 Patent Document 2 discloses that an anchor bolt connected to a fixing plate is driven into the inside of a column base concrete to secure pull-out proof strength of the anchor bolt.

特開２０１２−５７４３０号公報JP2012-57430A 特許第４５７５０１９号公報Japanese Patent No. 4575019

特許文献１では、鉄骨柱に引抜力が作用した際には、この引抜力は、鉄骨柱からコンクリート造の基礎フーチングを構成する縦筋に伝達され、この縦筋を介して、杭に伝達される。よって、縦筋に高い引張応力が生じるので、縦筋に沿ってひび割れが発生するおそれがあった。また、高い引抜力が加わる鉄骨柱においては、基礎フーチングを構成する縦横筋が高密度に配筋する必要があり、基礎フーチングが大型化する傾向があった。 In Patent Document 1, when the pulling force acts on the steel column, the pulling force is transmitted from the steel column to the vertical bar that constitutes the concrete foundation footing, and is transmitted to the pile through the vertical bar. It Therefore, a high tensile stress is generated in the vertical streaks, which may cause cracks along the vertical streaks. Further, in a steel frame column to which a high pulling force is applied, it is necessary to arrange longitudinal and lateral reinforcements constituting the basic footing at a high density, which tends to increase the size of the basic footing.

また、特許文献１では、杭の上端面に仮設支持材を設置し、この仮設支持材の上端面にプレートを設けて、このプレート上に鉄骨柱を固定していた。よって、鉄骨柱の建込位置の決定と据付け調整は、鉄骨柱とプレートとの間に高さ調整材を挿入して調整する必要があり、据付け高さの位置決めおよび建込み精度を確保するのに多くの時間を要していた。 Further, in Patent Document 1, a temporary support material is installed on the upper end surface of the pile, a plate is provided on the upper end surface of the temporary support material, and the steel column is fixed on the plate. Therefore, in order to determine the installation position and installation adjustment of the steel column, it is necessary to insert a height adjustment material between the steel column and the plate for adjustment, and to secure the installation height positioning and installation accuracy. It took a lot of time.

特許文献２では、鉄骨柱を固定するには、鉄骨柱を上回る幅広部を備えた柱脚基礎コンクリートが必要であり、鉄骨柱の配置を計画する上で設計の自由度が制限されていた。 In Patent Document 2, in order to fix the steel column, a column base concrete having a wide portion that exceeds the steel column is required, and the degree of freedom in design is limited when planning the arrangement of the steel columns.

本発明は、鋼製柱の建込位置の位置決めが容易で、かつ、上部構造に発生する力を杭にスムーズに伝達させることで優れた靱性を有する鋼製柱と杭の接合部構造を提供することを課題とする。 INDUSTRIAL APPLICABILITY The present invention provides a joint portion structure between a steel column and a pile, which facilitates positioning of a built-up position of the steel column and has excellent toughness by smoothly transmitting a force generated in the upper structure to the pile. The task is to do.

第１の発明は、鋼製柱（例えば、後述の鋼製柱２０、２０Ａ）と杭（例えば、後述の杭１０）の接合部の構造であって、上端部にプレート（例えば、後述の上部プレート３２）を有する鋼製の連結部材（例えば、後述の連結部材３０、３０Ａ、３０Ｂ）が設けられ、当該連結部材のプレートは、前記鋼製柱の下端部に接合され、前記連結部材の下端部は、前記杭の内部のコンクリート体に埋設されていることを特徴とする。 A first invention is a structure of a joint portion between a steel column (for example, steel columns 20 and 20A described below) and a pile (for example, a pile 10 described below), and a plate (for example, an upper portion described below) at an upper end portion. A connecting member made of steel (for example, connecting members 30, 30A, 30B described later) having a plate 32) is provided, and the plate of the connecting member is joined to the lower end portion of the steel column, and the lower end of the connecting member is provided. The part is embedded in a concrete body inside the pile.

第１の発明によれば、柱に接合されてかつ杭体内に定着される連結部材を設けた。よって、この連結部材の埋設長さを調整することで、柱の高さ位置を調整できる。また、連結部材が鋼製柱と杭との間に配置され、この連結部材は、鋼製柱に接合されるとともに、杭体内に定着されているので、鋼製の連結部材に生じた引張力が、杭を構成する縦鉄筋に伝達されるから、柱の耐震性能を十分に確保できる。従来のように、基礎フーチングを構成する縦筋により鋼製柱と杭との間で引抜力を伝達させる必要がなく、基礎フーチングの縦筋を密に配置する必要はない。よって、基礎フーチングを小型化することができる。また、鋼製柱の建込位置の位置決めが容易であり、上部構造に発生する力を杭にスムーズに伝達させて優れた靱性を発揮できる。 According to the first aspect of the invention, the connecting member is provided that is joined to the pillar and is fixed in the pile body. Therefore, the height position of the pillar can be adjusted by adjusting the embedded length of the connecting member. Further, since the connecting member is arranged between the steel pillar and the pile, and the connecting member is joined to the steel pillar and is fixed in the pile body, the tensile force generated in the steel connecting member However, since it is transmitted to the vertical reinforcing bars that make up the pile, the seismic performance of the column can be sufficiently secured. Unlike in the prior art, it is not necessary to transmit the pulling force between the steel columns and the piles by the vertical streaks constituting the foundation footing, and it is not necessary to arrange the vertical streaks of the foundation footing closely. Therefore, the basic footing can be downsized. Further, it is easy to position the built-up position of the steel column, and it is possible to smoothly transmit the force generated in the upper structure to the pile and exhibit excellent toughness.

また、連結部材の下端部を、杭体内のコンクリートに埋設したので、連結部材の下端部は、硬化したコンクリートにより拘束されるうえに、コンクリートの付着作用により、杭に強固に接合される。 Further, since the lower end portion of the connecting member is embedded in the concrete in the pile body, the lower end portion of the connecting member is restrained by the hardened concrete and is firmly joined to the pile by the adhering action of the concrete.

第２の発明は、前記連結部材の前記コンクリート体に埋設された部分の外周面には、スタッド（例えば、後述のスタッド３３）が設けられていることを特徴とする。 A second invention is characterized in that a stud (for example, a stud 33 described later) is provided on an outer peripheral surface of a portion of the connecting member embedded in the concrete body.

第２の発明によれば、連結部材のコンクリート体に埋設された部分にスタッドを植設したので、スタッドを介して連結部材を杭体に定着させ、連結部材を杭体に強固に固着させることができる。
また、スタッドは、鋼製柱に作用する曲げモーメント、せん断力、および軸力の大きさに応じて、フランジおよび／またはウエブに設けることで、連結部材を杭体に定着させることができる。 According to the second invention, since the stud is planted in the portion of the connecting member embedded in the concrete body, the connecting member is fixed to the pile body through the stud, and the connecting member is firmly fixed to the pile body. You can
Further, the stud can be attached to the pile body by providing the stud on the flange and/or the web according to the magnitude of the bending moment, the shearing force, and the axial force acting on the steel column.

第３の発明は、前記鋼製柱の下端部の外周面および／または前記連結部材の外周面には、スタッド（例えば、後述のスタッド２３、３３）が設けられ、当該スタッドは、前記鋼製柱の下端部の外周面を覆うコンクリート体（例えば、後述の基礎フーチング４０）に埋設されていることを特徴とする。 A third invention is that a stud (for example, studs 23 and 33 described later) is provided on the outer peripheral surface of the lower end of the steel column and/or the outer peripheral surface of the connecting member, and the stud is made of the steel. It is characterized in that it is embedded in a concrete body (for example, a foundation footing 40 described later) that covers the outer peripheral surface of the lower end of the pillar.

第３の発明によれば、鋼製柱の下端部の外周面および／または前記連結部材の外周面にスタッドを設けたので、スタッドを介して連結部材を基礎フーチングなどのコンクリート体に定着させ、連結部材を基礎フーチングに強固に固着させることができる。 According to the third invention, since the stud is provided on the outer peripheral surface of the lower end portion of the steel column and/or the outer peripheral surface of the connecting member, the connecting member is fixed to the concrete body such as the foundation footing through the stud, The connecting member can be firmly fixed to the foundation footing.

本発明によれば、前記鋼製柱の下端部の外周面を覆うコンクリート体は、下端面が前記杭の上端面より下方に位置しており、上端面が前記鋼製柱の下端面より上方に位置していることが好ましい。 According to the present invention, the concrete body covering the outer peripheral surface of the lower end portion of the steel column has the lower end surface located below the upper end surface of the pile, and the upper end surface located above the lower end surface of the steel column. It is preferably located at.

本発明によれば、鋼製柱の建込位置の位置決めが容易で、かつ、上部構造に発生する力を杭にスムーズに伝達させることで優れた靱性を有する鋼製柱と杭との接合部の構造を提供できる。 ADVANTAGE OF THE INVENTION According to this invention, it is easy to position the built-in position of a steel column, and the joint part of a steel column and a pile which has excellent toughness by transmitting the force which generate|occur|produces in an upper structure smoothly to a pile. Can provide the structure of.

本発明の第１実施形態に係る柱と杭との接合部構造の縦断面図である。It is a longitudinal cross-sectional view of the joint structure between the pillar and the pile according to the first embodiment of the present invention. 図１のＡ−Ａ断面図およびＢ−Ｂ断面図である。It is the AA sectional view and BB sectional view of FIG. 本発明の参考例に係る柱と杭との接合部構造の縦断面図である。It is a longitudinal cross-sectional view of the joint part structure of the pillar and the pile which concerns on the reference example of this invention. 図３のＣ−Ｃ断面図およびＤ−Ｄ断面図である。It is CC sectional view and DD sectional view of FIG. 本発明の第２実施形態に係る柱と杭との接合部構造の縦断面図である。It is a longitudinal cross-sectional view of the joint part structure of the pillar and the pile which concerns on 2nd Embodiment of this invention. 図５のＥ−Ｅ断面図である。FIG. 6 is a sectional view taken along line EE of FIG. 5. 本発明の第１の変形例に係る柱と杭との接合部構造の縦断面図である。It is a longitudinal cross-sectional view of the joint part structure of the pillar and the pile which concerns on the 1st modification of this invention. 本発明の第２の変形例に係る柱と杭との接合部構造の縦断面図およびＦ−Ｆ断面図である。It is a longitudinal cross-sectional view and FF sectional drawing of the joint part structure of the pillar and the pile which concern on the 2nd modification of this invention. 本発明の第２の変形例に係る柱と杭との接合部構造の縦断面図およびＧ−Ｇ断面図である。It is a longitudinal cross-sectional view and GG sectional drawing of the joint part structure of the pillar and the pile which concern on the 2nd modification of this invention.

本発明者は、鋼製柱と杭体を接続する接合部構造として、鋼製柱の下端部に接合された連結部材を杭頭の中空部に挿入し、この連結部材をコンクリートで根固めすることで、連結部材が鋼製柱の高さ調整部材として機能するとともに、鋼製柱と杭体を連結する引抜き抵抗材として機能することに着目し、鋼製柱と杭体の接合部構造を発明するに至った。
具体的には、鋼製柱と杭を接続する連結部材は、鋼製柱の下端部に接合されてスタッドが植設されたＨ型鋼材（第１実施形態）と、鋼製柱を二分割した柱下部に接合された複数の溝型鋼材（第２実施形態）と、杭上端面に固定されるプレートを備えた構成（第３実施形態）である。 The present inventor inserts a connecting member joined to a lower end of a steel column into a hollow portion of a pile head as a joint structure for connecting a steel column and a pile body, and consolidates the connecting member with concrete. Therefore, paying attention to the fact that the connecting member functions as a height adjusting member for the steel column, and also as a pull-out resistance material that connects the steel column and the pile body, the joint structure of the steel column and the pile body is considered. Invented.
Specifically, the connecting member that connects the steel column and the pile is divided into two parts, that is, an H-shaped steel material (first embodiment) that is joined to the lower end of the steel column and has studs implanted therein. It is a configuration including a plurality of grooved steel materials (second embodiment) joined to the lower part of the pillar and a plate fixed to the upper end surface of the pile (third embodiment).

以下、本発明の実施形態を図面に基づいて説明する。なお、以下の実施形態の説明にあたって、同一構成要件については同一符号を付し、その説明を省略もしくは簡略化する。
〔第１実施形態〕
図１は、本発明の第１実施形態に係る柱と杭との接合部構造１の縦断面図である。図２（ａ）は、図１のＡ−Ａ断面図であり、図２（ｂ）は、図１のＢ−Ｂ断面図である。
柱と杭との接合部構造１は、地盤中に構築された杭１０と、鋼製柱２０と、鋼製柱２０の下端部に接合されてかつ杭１０に定着される鋼製の連結部材３０と、を備える。
杭１０の上部には、鋼製柱２０の下端部および連結部材３０が打ち込まれる基礎フーチング４０が構築されている。 Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following description of the embodiments, the same constituents will be given the same reference numeral, and the description thereof will be omitted or simplified.
[First Embodiment]
FIG. 1 is a vertical sectional view of a joint structure 1 between a pillar and a pile according to the first embodiment of the present invention. 2A is a sectional view taken along the line AA of FIG. 1, and FIG. 2B is a sectional view taken along the line BB of FIG.
The joint structure 1 of a pillar and a pile is a pile 10 constructed in the ground, a steel pillar 20, and a steel connecting member that is joined to the lower end of the steel pillar 20 and is fixed to the pile 10. 30 is provided.
On the upper part of the pile 10, a base footing 40 into which the lower end of the steel column 20 and the connecting member 30 are driven is constructed.

杭１０は、既製の円筒形状のＲＣ杭（遠心成形された鉄筋コンクリート杭）であり、内部に中空部１１が形成された中空杭である。 The pile 10 is a ready-made cylindrical RC pile (centrifugal-molded reinforced concrete pile), and is a hollow pile in which a hollow portion 11 is formed.

鋼製柱２０は、Ｈ形鋼である柱本体２１と、この柱本体２１の下端に設けられた下部プレート２２と、柱本体２１の下端部の外周面に植設されたスタッド２３と、を備える。 The steel column 20 includes a column main body 21 that is an H-shaped steel, a lower plate 22 provided at the lower end of the column main body 21, and a stud 23 that is planted on the outer peripheral surface of the lower end of the column main body 21. Prepare

連結部材３０は、略鉛直に延びるＨ形鋼からなる鉛直部３１と、この鉛直部３１の上端に設けられた略水平な板状の上部プレート３２と、を備える。
上部プレート３２には、鋼製柱２０の下部プレート２２がボルト２４で接合される。これにより、連結部材３０の上部プレート３２は、鋼製柱２０の下端部の下部プレート２２に接合される。 The connecting member 30 includes a vertical portion 31 made of H-shaped steel extending substantially vertically, and a substantially horizontal plate-shaped upper plate 32 provided at an upper end of the vertical portion 31.
The lower plate 22 of the steel column 20 is joined to the upper plate 32 with bolts 24. As a result, the upper plate 32 of the connecting member 30 is joined to the lower plate 22 at the lower end of the steel column 20.

鉛直部３１の下端部は、杭１０の中空部１１に挿入されて、この中空部１１の上端部には、充填されたコンクリートが打設されている。これにより、連結部材３０の下端部は、中空部１１の硬化したコンクリート体１２に埋設されている。
鉛直部３１の上部のフランジおよびウエブの外周面には、スタッド３３が植設されている。ただし、鋼製柱が負担する外部荷重が小さい場合は、鉛直部のフランジおよびウエブの一方のみに、スタッドを設けてもよい。 The lower end of the vertical portion 31 is inserted into the hollow portion 11 of the pile 10, and the filled concrete is cast into the upper end of the hollow portion 11. As a result, the lower end portion of the connecting member 30 is embedded in the hardened concrete body 12 of the hollow portion 11.
Studs 33 are planted on the upper flange of the vertical portion 31 and the outer peripheral surface of the web. However, if the external load carried by the steel column is small, the stud may be provided on only one of the flange and the web of the vertical portion.

鉛直部３１は、鋼製柱２０の柱本体２１よりも、水平断面積が小さくなっている。なお、この鉛直部３１は、鉛直部３１の杭１０に対する定着強度を確保でき、かつ、杭１０と鋼製柱２０との間の引張力に十分に抵抗できるサイズであればよい。 The vertical portion 31 has a smaller horizontal cross-sectional area than the column main body 21 of the steel column 20. The vertical portion 31 may have a size that can secure the fixing strength of the vertical portion 31 to the pile 10 and can sufficiently resist the tensile force between the pile 10 and the steel column 20.

柱本体２１のスタッド２３が設けられた部分、および、鉛直部３１の上部のスタッド３３が設けられた部分は、基礎フーチング４０に埋設されている。
すなわち、基礎フーチング４０は、鋼製柱２０の下端部および連結部材３０の外周面を覆うコンクリート体であり、下端面が杭１０の上端面より下方に位置しており、上端面が鋼製柱２０の下端面より上方に位置している。 The portion of the column main body 21 where the stud 23 is provided and the portion of the vertical portion 31 where the stud 33 is provided are embedded in the foundation footing 40.
That is, the foundation footing 40 is a concrete body that covers the lower end portion of the steel column 20 and the outer peripheral surface of the connecting member 30, the lower end surface is located below the upper end surface of the pile 10, and the upper end surface is the steel column. It is located above the lower end surface of 20.

本実施形態によれば、以下のような効果がある。
（１）鋼製柱２０に接合されて杭１０に定着される連結部材３０を設けた。したがって、この連結部材３０の埋設長さを調整することで、鋼製柱２０の高さ位置を調整できる。また、連結部材３０が鋼製柱２０に接合されるとともに、杭１０に定着されているので、連結部材３０に生じた引張力が杭１０を構成する縦鉄筋に伝達されるから、鋼製柱２０の耐震性能を十分に確保できる。よって、基礎フーチング４０を小型化することができ、また、鋼製柱２０の建込位置の位置決めが容易であり、上部構造に発生する力を杭１０にスムーズに伝達させて優れた靱性を発揮できる。 According to this embodiment, there are the following effects.
(1) The connecting member 30 joined to the steel column 20 and fixed to the pile 10 is provided. Therefore, the height position of the steel column 20 can be adjusted by adjusting the embedded length of the connecting member 30. Further, since the connecting member 30 is joined to the steel column 20 and is fixed to the pile 10, the tensile force generated in the connecting member 30 is transmitted to the vertical reinforcing bars constituting the pile 10. The seismic performance of 20 can be sufficiently secured. Therefore, the foundation footing 40 can be miniaturized, the positioning of the steel column 20 can be easily positioned, and the force generated in the superstructure can be smoothly transmitted to the pile 10 to exhibit excellent toughness. it can.

（２）鋼製柱２０の下端部の外周面および連結部材３０の鉛直部３１の外周面にスタッド２３、３３を植設したので、鋼製柱２０と連結部材３０とは、スタッド２３、３３を介して基礎フーチング４０のコンクリート体に強固に定着される。 (2) Since the studs 23 and 33 are planted on the outer peripheral surface of the lower end portion of the steel column 20 and the outer peripheral surface of the vertical portion 31 of the connecting member 30, the steel column 20 and the connecting member 30 are studs 23 and 33. It is firmly fixed to the concrete body of the foundation footing 40 via.

（３）鋼製柱２０と連結部材３０とを上部プレート３２を介して接合することで、鋼製柱２０と連結部材３０の鉛直部３１とが異なる断面形状であっても、確実に接合できる。また、鋼製柱２０を略水平な上部プレート３２に接合することで、鋼製柱２０の鉛直精度を確保できる。 (3) By joining the steel column 20 and the connecting member 30 via the upper plate 32, even if the steel column 20 and the vertical portion 31 of the connecting member 30 have different cross-sectional shapes, they can be reliably joined. . Further, by joining the steel column 20 to the substantially horizontal upper plate 32, the vertical accuracy of the steel column 20 can be secured.

（４）連結部材３０の下端部を円筒形状のＲＣ杭１０の内部に充填したコンクリート体１２に打ち込んだので、コンクリート体１２は、杭１０の壁面で係止され、そのコンクリートによる摩擦とコンクリート体１２の付着作用により拘束されるので、杭１０に強固に接合される。 (4) Since the lower end portion of the connecting member 30 is driven into the concrete body 12 filled in the cylindrical RC pile 10, the concrete body 12 is locked by the wall surface of the pile 10, and the friction and the concrete body caused by the concrete Since it is restrained by the adhesive action of 12, it is firmly joined to the pile 10.

〔参考例〕
図３は、本発明の参考例に係る柱と杭との接合部構造１Ａの縦断面図である。図４（ａ）は、図３のＣ−Ｃ断面図であり、図４（ｂ）は、図３のＤ−Ｄ断面図である。
本参考例では、鋼製柱２０Ａは、上下に二分割されており、柱下部５０と、この柱下部５０の上に設けられた柱上部５１と、を備える。 [ Reference example ]
FIG. 3 is a vertical sectional view of a joint structure 1A between a pillar and a pile according to a reference example of the present invention. 4A is a sectional view taken along the line CC of FIG. 3, and FIG. 4B is a sectional view taken along the line DD of FIG.
In this reference example , the steel column 20A is vertically divided into two parts, and includes a column lower portion 50 and a column upper portion 51 provided on the column lower portion 50.

柱下部５０は、角形鋼管である柱本体５２と、この柱本体５２の下端に設けられた下部プレート５３と、柱本体５２の上端に設けられた板材である上部プレート５４と、柱本体５２の外周側面に植設されたスタッド５５と、を備える。
柱下部５０の下部プレート５３は、連結部材３０の上部プレート３２にボルト２４で接合される。 The column lower part 50 includes a column body 52 which is a rectangular steel tube, a lower plate 53 which is provided at a lower end of the column body 52, an upper plate 54 which is a plate material provided at an upper end of the column body 52, and a column body 52. And a stud 55 planted on the outer peripheral side surface.
The lower plate 53 of the column lower portion 50 is joined to the upper plate 32 of the connecting member 30 with the bolt 24.

柱上部５１は、角形鋼管である柱本体５６と、この柱本体５６の下端に設けられた下部プレート５７と、を備える。柱上部５１の下部プレート５７は、柱下部５０の上部プレート５４にボルト固定される。 The column upper portion 51 includes a column main body 56 which is a rectangular steel pipe, and a lower plate 57 provided at the lower end of the column main body 56. The lower plate 57 of the column upper portion 51 is bolted to the upper plate 54 of the column lower portion 50.

また、連結部材３０Ａの鉛直部３１は、一対の溝形鋼を、背中合わせにかつ所定間隔離れて配置して構成されている。 The vertical portion 31 of the connecting member 30A is formed by arranging a pair of grooved steels back to back and at a predetermined distance.

本参考例によれば、上述の（１）〜（４）の効果に加えて、以下のような効果がある。
（５）鋼製柱２０Ａを上下に二分割したので、鋼製柱２０Ａを杭１０に建込む際に、鉛直精度を容易に管理できる。 According to this reference example , in addition to the effects (1) to (4) described above, the following effects are obtained.
(5) Since the steel column 20A is vertically divided into two, the vertical accuracy can be easily managed when the steel column 20A is built in the pile 10.

〔第２実施形態〕
図５は、本発明の第２実施形態に係る柱と杭との接合部構造１Ｂの縦断面図である。図６は、図５のＥ−Ｅ断面図である。
本実施形態では、連結部材３０Ｂには、定着部材６０が取り付けられている。この定着部材６０は、杭１０の上端面に固定された円環状のプレート６１と、このプレート６１から下方に延びて杭１０のコンクリート体１２に埋設された定着部６２と、を備える。
また、連結部材３０Ｂの鉛直部３１の下端部には、円盤状の下部プレート３４が取り付けられている。この下部プレート３４は、定着部材６０のプレート６１にボルト６３で接合される。 [ Second Embodiment]
FIG. 5 is a vertical cross-sectional view of a joint structure 1B between a pillar and a pile according to the second embodiment of the present invention. FIG. 6 is a sectional view taken along line EE of FIG.
In the present embodiment, the fixing member 60 is attached to the connecting member 30B. The fixing member 60 includes an annular plate 61 fixed to the upper end surface of the pile 10 and a fixing portion 62 that extends downward from the plate 61 and is embedded in the concrete body 12 of the pile 10.
A disc-shaped lower plate 34 is attached to the lower end of the vertical portion 31 of the connecting member 30B. The lower plate 34 is joined to the plate 61 of the fixing member 60 with bolts 63.

本実施形態によれば、上述の（１）〜（４）と同様の効果がある。 According to this embodiment, there are the same effects as the above (1) to (4).

なお、本発明は前記実施形態に限定されるものではなく、本発明の目的を達成できる範囲での変形、改良等は本発明に含まれるものである。
例えば、上述の各実施形態では、杭１０として、既製のＲＣ杭を用いたが、これに限らず、例えば、ＰＣ杭（プレストレストコンクリート杭）、ＰＨＣ杭（高強度プレストレストコンクリート杭）、ＰＲＣ杭（高強度プレストレスト鉄筋コンクリート杭）、ＳＣ杭（外殻鋼管付きコンクリート杭）を用いてもよい。 It should be noted that the present invention is not limited to the above-described embodiment, and modifications, improvements, etc. within the scope of achieving the object of the present invention are included in the present invention.
For example, although the ready-made RC pile is used as the pile 10 in each of the above-described embodiments, the present invention is not limited to this. For example, a PC pile (prestressed concrete pile), a PHC pile (high-strength prestressed concrete pile), and a PRC pile ( High-strength prestressed reinforced concrete pile) and SC pile (concrete pile with outer shell steel pipe) may be used.

また、上述の各実施形態では、鋼製柱２０の柱本体２１をＨ形鋼とし、鋼製柱２０Ａの柱本体５２、５６を角形鋼管としたが、これに限らず、円形鋼管などを用いてもよい。また、さらに、角形鋼管や円形鋼管である柱本体内にコンクリートを充填して、鋼製柱をＣＦＴ（Ｃｏｎｃｒｅｔｅ Ｆｉｌｌｅｄ Ｓｔｅｅｌ Ｔｕｂｅ）柱としてもよい。 Further, in each of the above-described embodiments, the column main body 21 of the steel column 20 is H-shaped steel and the column main bodies 52 and 56 of the steel column 20A are square steel pipes, but the present invention is not limited to this, and a circular steel pipe or the like is used. May be. Further, concrete may be filled in a column body that is a rectangular steel pipe or a circular steel pipe, and the steel column may be a CFT (Concrete Filled Steel Tube) column.

また、本発明の杭は、既製コンクリート杭でなく、建設現場で構築される場所打ちコンクリート杭でもよい。場所打ちコンクリート杭の場合、杭頭部に中空部は設けられないことが多く、杭体の中心付近に連結材を打ち込むことで、鋼製柱と杭を連結材で接続することができる。 The pile of the present invention may be a cast-in-place concrete pile constructed at a construction site, instead of a ready-made concrete pile. In the case of cast-in-place concrete piles, a hollow part is often not provided in the pile head, and by driving the connecting material near the center of the pile body, it is possible to connect the steel pillar and the pile with the connecting material.

また、上述の各実施形態では、鋼製柱２０の下部プレート２２と連結部材３０の上部プレート３２とを連結したが、これに限らず、連結部材３０の上端部に、鋼製柱２０の下部プレート２２の下面に、一対の山形鋼材を取り付け、これら山形鋼材と鋼製柱２０の下部プレート２２とを連結する構成としてもよい。この山形鋼材は、鋼製柱２０と連結部材３０との間の接続部材で、かつ高さ調整部材を兼ねるものである。 In addition, in each of the above-described embodiments, the lower plate 22 of the steel column 20 and the upper plate 32 of the connecting member 30 are connected to each other, but the present invention is not limited to this. A pair of chevron steel materials may be attached to the lower surface of the plate 22, and the chevron steel materials and the lower plate 22 of the steel column 20 may be connected. This angle steel material is a connecting member between the steel column 20 and the connecting member 30 and also serves as a height adjusting member.

また、図７に示すように、連結部材３０の鉛直部３１のうちコンクリート体１２に埋設された部分のフランジおよびウエブの外周面にも、スタッド３３を植設してもよい。この構成によれば、スタッド３３を備えた連結部材３０の鉛直部３１が、杭１０の中空部１１のコンクリート体１２との付着作用により、杭１０に強固に接合される。また、連結部材３０の鉛直部３１からコンクリート体１２に伝達された曲げモーメント、せん断力および軸力は、杭１０のコンクリート体１２と杭１０の内周面との摩擦抵抗機構によって、杭１０に伝達される。よって、杭１０のコンクリート体１２は、内部応力分を摩擦抵抗によって杭１０に伝達させるのに十分な高さを有している。 Further, as shown in FIG. 7, the studs 33 may be planted also on the outer peripheral surface of the flange and the web of the portion of the vertical portion 31 of the connecting member 30 which is embedded in the concrete body 12. According to this configuration, the vertical portion 31 of the connecting member 30 including the stud 33 is firmly joined to the pile 10 by the adhering action of the hollow portion 11 of the pile 10 with the concrete body 12. The bending moment, shearing force, and axial force transmitted from the vertical portion 31 of the connecting member 30 to the concrete body 12 are applied to the pile 10 by the friction resistance mechanism between the concrete body 12 of the pile 10 and the inner peripheral surface of the pile 10. Transmitted. Therefore, the concrete body 12 of the pile 10 has a height sufficient to transmit the internal stress component to the pile 10 by frictional resistance.

また、図８に示すように、連結部材３０の下部の所定の高さ位置に、水平方向に延びる位置決め材３５を取り付けて、この位置決め材３５を杭１０の上端縁に載置することで、連結部材３０の高さ方向の位置決めを行ってもよい。位置決め材３５は、例えば山形鋼材や溝型鋼材であり、連結部材３０に溶接またはボルトで固定される。この構成によれば、鋼製柱２０の高さ方向の建込精度および建込時の固定度を高めることができる。 Further, as shown in FIG. 8, by mounting a positioning member 35 extending in the horizontal direction at a predetermined height position below the connecting member 30, and mounting the positioning member 35 on the upper edge of the pile 10, The connection member 30 may be positioned in the height direction. The positioning member 35 is, for example, an angle steel member or a groove steel member, and is fixed to the connecting member 30 by welding or bolts. According to this configuration, it is possible to increase the installation accuracy in the height direction of the steel column 20 and the degree of fixation during installation.

また、図９に示すように、連結部材３０の下部の所定の高さ位置に水平方向に延びる位置決め材３６を取り付けるが、この位置決め材３６をコンクリート体１２の上面に載置することで、連結部材３０の高さ方向の位置決めを行ってもよい。位置決め材３６は、例えば平鋼材、山形鋼材、溝型鋼材である。この構成によれば、鋼製柱２０の高さ方向の建込精度および建込時の固定度を高めることができる。 Further, as shown in FIG. 9, a positioning member 36 extending in the horizontal direction is attached to a predetermined height position below the connecting member 30. By mounting the positioning member 36 on the upper surface of the concrete body 12, the connecting member 36 is connected. The member 30 may be positioned in the height direction. The positioning material 36 is, for example, a flat steel material, an angle steel material, or a grooved steel material. According to this configuration, it is possible to increase the installation accuracy in the height direction of the steel column 20 and the degree of fixation during installation.

１、１Ａ、１Ｂ…柱と杭との接合部構造
１０…杭 １１…中空部 １２…コンクリート体
２０、２０Ａ…鋼製柱 ２１…柱本体 ２２…下部プレート ２３…スタッド ２４…ボルト
３０、３０Ａ、３０Ｂ…連結部材 ３１…鉛直部 ３２…上部プレート ３３…スタッド ３４…下部プレート ３５、３６…位置決め部材
４０…基礎フーチング
５０…柱下部 ５１…柱上部 ５２…柱本体 ５３…下部プレート ５４…上部プレート ５５…スタッド ５６…柱本体 ５７…下部プレート
６０…定着部材 ６１…プレート ６２…定着部 ６３…ボルト 1, 1A, 1B... Joint structure between pillar and pile 10... Pillar 11... Hollow part 12... Concrete body 20, 20A... Steel pillar 21... Pillar body 22... Lower plate 23... Stud 24... Bolt 30, 30A, 30B... Connecting member 31... Vertical part 32... Upper plate 33... Stud 34... Lower plate 35, 36... Positioning member 40... Foundation footing 50... Column lower part 51... Column upper part 52... Column body 53... Lower plate 54... Upper plate 55 ... Stud 56 ... Pillar body 57 ... Lower plate 60 ... Fixing member 61 ... Plate 62 ... Fixing part 63 ... Bolt

Claims (2)

杭と、当該杭の上に設けられた基礎フーチングと、当該基礎フーチングに下端部が埋設された鋼製柱と、を備える、鋼製柱と杭の接合部の構造であって、
前記杭と前記鋼製柱の下端部とは、前記基礎フーチングに埋設された連結部材で連結され、
前記連結部材は、略鉛直に延びる鉛直部と、当該鉛直部の上端に設けられた略水平な板状の上部プレートと、を備え、
当該上部プレートは、前記鋼製柱の下端部に接合され、
前記鉛直部の下端部は、前記杭の内部のコンクリート体に埋設され、
前記鉛直部のうち、前記基礎フーチングに埋設される部分の外周面には、スタッドが設けられていることを特徴とする鋼製柱と杭の接合部構造。 A structure of a joint between a steel column and a pile, comprising a pile, a foundation footing provided on the pile, and a steel column having a lower end embedded in the foundation footing,
Wherein a lower end portion of the pile and the steel pillars are connected by a consolidated member embedded in the foundation footing,
The connecting member includes a vertical portion extending substantially vertically, and a substantially horizontal plate-shaped upper plate provided at an upper end of the vertical portion,
The upper plate is joined to the lower end of the steel column,
The lower end of the vertical portion is embedded in the concrete body inside the pile,
A joint structure between a steel column and a pile, wherein a stud is provided on an outer peripheral surface of a portion of the vertical portion which is embedded in the foundation footing . 前記鉛直部の前記杭の内部のコンクリート体に埋設された部分の外周面には、スタッドが設けられ、かつ、前記鉛直部の水平断面積は、前記鋼製柱の水平断面積よりも小さいことを特徴とする請求項１に記載の鋼製柱と杭の接合部構造。 The outer peripheral surface of the embedded portion inside the concrete body before Kikui of the vertical portion, the stud is provided, and the horizontal cross-sectional area of the vertical section is smaller than the horizontal cross-sectional area of the steel pillar The joint structure between a steel column and a pile according to claim 1, wherein
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