JP2021156022A - Column structure - Google Patents

Column structure Download PDF

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JP2021156022A
JP2021156022A JP2020057767A JP2020057767A JP2021156022A JP 2021156022 A JP2021156022 A JP 2021156022A JP 2020057767 A JP2020057767 A JP 2020057767A JP 2020057767 A JP2020057767 A JP 2020057767A JP 2021156022 A JP2021156022 A JP 2021156022A
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column
reinforcing bar
intermediate member
pillar
stigma
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JP7486992B2 (en
Inventor
寛 齋藤
Hiroshi Saito
寛 齋藤
宗之助 馬場▲崎▼
Sonosuke Babasaki
宗之助 馬場▲崎▼
奈岐沙 冨澤
Nagisa Tomizawa
奈岐沙 冨澤
謙二 吉武
Kenji Yoshitake
謙二 吉武
正邦 波多野
Masakuni Hatano
正邦 波多野
昌史 久保
Masashi Kubo
昌史 久保
尚幸 荒木
Naoyuki Araki
尚幸 荒木
三郎 桐野
Saburo Kirino
三郎 桐野
剛 陸
Takeshi Riku
剛 陸
洋志 牧野
Hiroshi Makino
洋志 牧野
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Shimizu Construction Co Ltd
Shimizu Corp
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Shimizu Construction Co Ltd
Shimizu Corp
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Abstract

To provide a column structure capable of using a precast member at a column base part, even in the case where plasticizing of the column base part is permitted in an aseismatic design.SOLUTION: A column structure includes: a foundation part 2; column base members 31, 32 made of precast concrete provided on the foundation part 2; and column intermediate members 51, 52, 53 made of precast concrete provided on the column base members 31, 32. The foundation part 2 includes: a foundation part body 21; and a foundation part reinforcement 22 (first reinforcement) protruding upward from the foundation part body 21. The column base members 31, 32 have a first through-hole 33 penetrating in the vertical direction, and are installed on the foundation body part 21 in a state where the foundation part reinforcement 22 is inserted in the first through-hole 33 from below. The foundation part reinforcement 22 protrudes further upward than the column base members 31, 32, and is joined with the first column intermediate member 51 (column intermediate member) above the column base member 31.SELECTED DRAWING: Figure 1

Description

本発明は、柱の構造に関する。 The present invention relates to the structure of columns.

従来、プレキャストコンクリート部材を接合して構造物を構築する工法が知られている（例えば、特許文献１参照）。プレキャストコンクリート部材毎に鉄筋継手が設けられ、隣り合うプレキャストコンクリート部材の鉄筋同士が鉄筋継手によって接合されている。 Conventionally, a method of constructing a structure by joining precast concrete members is known (see, for example, Patent Document 1). Reinforcing bar joints are provided for each precast concrete member, and the reinforcing bars of adjacent precast concrete members are joined by the reinforcing bar joints.

特開２０１７−９５９１５号公報JP-A-2017-95915

耐震設計において柱基部の塑性化を許容する場合、柱基部の塑性化領域に鉄筋継手を設けない設計となっている。このため、耐震設計において柱基部の塑性化を許容する場合、基礎上端から柱幅の１．０倍から１．５倍の高さになる塑性化領域の柱基部に鉄筋継手が設けられたプレキャスト部材を使用することができず、柱基部のプレキャスト化ができないという問題がある。 When plasticization of the column base is allowed in the seismic design, the design is such that no reinforcing bar joint is provided in the plasticized area of the column base. For this reason, when plasticization of the column base is allowed in the seismic design, precast with a reinforcing bar joint provided at the column base in the plasticized region where the height is 1.0 to 1.5 times the column width from the upper end of the foundation. There is a problem that the member cannot be used and the column base cannot be precast.

そこで、本発明は、耐震設計において柱基部の塑性化を許容する場合でも、柱基部にプレキャスト部材を使用することができる柱の構造を提供することを目的とする。 Therefore, an object of the present invention is to provide a column structure in which a precast member can be used for the column base even when plasticization of the column base is allowed in the seismic design.

上記目的を達成するため、本発明に係る柱の構造は、基礎部と、前記基礎部の上の柱基部に設けられるプレキャストコンクリート製の柱基部材と、前記柱基部の上の柱中間部に設けられるプレキャストコンクリート製の柱中間部材と、を有し、前記基礎部は、基礎部本体と、基礎部本体から上方に突出する第１鉄筋と、を有し、前記柱基部材は、上下方向に貫通する第１貫通孔を有し、前記第１貫通孔に下側から前記第１鉄筋が挿通された状態で前記基礎部本体の上に設置され、前記第１鉄筋は、前記柱基部材よりも上方に突出し、前記柱基部材よりも上方で前記柱中間部材と接合されることを特徴とする。 In order to achieve the above object, the structure of the column according to the present invention is formed in a foundation portion, a column base member made of precast concrete provided on the column base portion above the foundation portion, and a column intermediate portion above the column base portion. It has a column intermediate member made of precast concrete to be provided, the foundation portion has a foundation portion main body, and a first reinforcing bar projecting upward from the foundation portion main body, and the column base member has a vertical direction. The first through hole is provided on the base body in a state where the first reinforcing bar is inserted from below into the first through hole, and the first reinforcing bar is the column base member. It is characterized in that it protrudes upward and is joined to the column intermediate member above the column base member.

本発明では、柱基部材は、上下方向に貫通する第１貫通孔を有し、基礎部の第１鉄筋が挿通され、第１鉄筋が柱基部材よりも上方で柱中間部材と接合されることにより、柱基部に鉄筋継手がない構造とすることができる。一般に、耐震設計において柱基部の塑性化を許容する場合には、柱基部に鉄筋継手がない構造としなければならない。本発明では、柱基部に鉄筋継手がない構造とすることができるため、柱基部をプレキャストコンクリート製の部材とした場合でも耐震設計において柱基部の塑性化を許容する設計とすることができる。すなわち、耐震設計において柱基部の塑性化を許容する場合でも、柱基部にプレキャスト部材を使用することができる。 In the present invention, the column base member has a first through hole penetrating in the vertical direction, the first reinforcing bar of the foundation portion is inserted, and the first reinforcing bar is joined to the column intermediate member above the column base member. This makes it possible to have a structure in which there is no reinforcing bar joint at the base of the column. In general, if plasticization of the column base is allowed in seismic design, the structure must have no reinforcing bar joint at the column base. In the present invention, since the column base can be constructed without a reinforcing bar joint, the column base can be designed to allow plasticization of the column base in the seismic design even when the column base is made of precast concrete. That is, a precast member can be used for the column base even when plasticization of the column base is allowed in the seismic design.

また、本発明に係る柱の構造では、前記柱基部には、複数の前記柱基部材が上下方向に配列され、前記第１鉄筋は、複数の前記柱基部材それぞれの前記第１貫通孔を貫通して、最上の前記柱基部材よりも上方に突出し、最上の前記柱基部材よりも上方で前記柱中間部材と接合されていてもよい。
このような構成とすることにより、柱基部が複数の柱基部材が配列される構造であっても、柱基部を鉄筋継手がない構造とすることができる。 Further, in the structure of the column according to the present invention, a plurality of the column base members are arranged in the vertical direction at the column base portion, and the first reinforcing bar has the first through holes of the plurality of column base members. It may penetrate and project upward from the uppermost column base member, and may be joined to the column intermediate member above the uppermost pillar base member.
With such a configuration, even if the column base has a structure in which a plurality of column base members are arranged, the column base can have a structure without a reinforcing bar joint.

また、本発明に係る柱の構造では、前記中間柱部材は、中間柱部材本体と、前記中間柱部材本体に埋設される第２鉄筋と、を有し、前記中間柱部材本体には、下側に開口し前記第２鉄筋が配置されたスリーブが設けられ、前記スリーブには、前記第１鉄筋の上部側が下側から挿入され、前記第１鉄筋と前記第２鉄筋とが、前記スリーブに充填されたグラウト材を介して接合されていてもよい。
このような構成とすることにより、第１鉄筋と第２鉄筋とをスリーブ内へのグラウト材充填によって接合し、鉄筋同士を直接接合しなくてよい。このため、第１鉄筋と第２鉄筋とを直接接合する重ね継手や溶接継手等を設ける作業がなく、柱基部材の第１貫通孔に挿通された第１鉄筋の定着と、第１鉄筋と第２鉄筋との接合を同時に施工することができる。その結果、柱の施工工期を短縮することができる。 Further, in the structure of the column according to the present invention, the intermediate column member has an intermediate column member main body and a second reinforcing bar embedded in the intermediate column member main body, and the intermediate column member main body has a lower portion. A sleeve that opens to the side and is arranged with the second reinforcing bar is provided, and the upper side of the first reinforcing bar is inserted into the sleeve from the lower side, and the first reinforcing bar and the second reinforcing bar are inserted into the sleeve. It may be joined via a filled grout material.
With such a configuration, the first reinforcing bar and the second reinforcing bar may be joined by filling the sleeve with a grout material, and the reinforcing bars do not have to be directly joined to each other. For this reason, there is no work of providing a lap joint or a welded joint that directly joins the first reinforcing bar and the second reinforcing bar, and the first reinforcing bar inserted into the first through hole of the column base member is fixed and the first reinforcing bar is used. The joint with the second reinforcing bar can be constructed at the same time. As a result, the construction period of the pillar can be shortened.

また、本発明に係る柱の構造では、前記柱中間部の上の柱頭部に設けられるプレキャストコンクリート製の柱頭部材を有し、前記柱中間部材は、柱中間部材本体と、前記中間柱部材本体に埋設される第２鉄筋と、を有し、前記第２鉄筋は、下部側が前記中間柱部材本体に埋設され上部側が前記柱中間部材本体から上方に突出し、前記柱頭部材は、上下方向に貫通する第２貫通孔を有し、前記第２貫通孔に下側から前記第２鉄筋の上部側が挿通された状態で前記柱中間部材本体の上に設置され、前記第２鉄筋の上部側は、前記柱頭部材よりも上方に突出し、前記柱頭部材よりも上方において前記柱頭部材の上に設けられる部材と接合されていてもよい。
このような構成とすることにより、柱頭部についても鉄筋継手のない構造とすることができる。このため、耐震設計において柱頭部の塑性化を許容する設計とする際にも、柱頭部にプレキャスト部材を使用することができる。 Further, the column structure according to the present invention has a column head member made of precast concrete provided on the column head above the column intermediate portion, and the column intermediate member includes a column intermediate member main body and the intermediate pillar member main body. The second reinforcing bar is embedded in the intermediate column member main body on the lower side and protrudes upward from the column intermediate member main body, and the stigma member penetrates in the vertical direction. It has a second through hole to be formed, and is installed on the column intermediate member main body in a state where the upper side of the second reinforcing bar is inserted from the lower side into the second through hole, and the upper side of the second reinforcing bar is It may protrude upward from the stigma member and may be joined to a member provided on the stigma member above the stigma member.
With such a configuration, the stigma can also be configured without a reinforcing bar joint. Therefore, a precast member can be used for the stigma even when the seismic design allows plasticization of the stigma.

本発明によれば、耐震設計において柱基部の塑性化を許容する場合でも、柱基部にプレキャスト部材を使用することができる。 According to the present invention, a precast member can be used for the column base even when plasticization of the column base is allowed in the seismic design.

本発明の第１実施形態による柱の構造の一例を示す鉛直断面図である。It is a vertical cross-sectional view which shows an example of the structure of the column by 1st Embodiment of this invention. 基礎部を構築する工程を示す図である。It is a figure which shows the process of constructing a foundation part. 柱基部を構築する工程を示す図である。It is a figure which shows the process of constructing a column base. 第１柱中間部材を設置する工程を示図である。It is a figure which shows the process of installing the 1st pillar intermediate member. 第２柱中間部材および第３柱中間部材を設置する工程、柱頭部材を設置する工程を示す図である。It is a figure which shows the process of installing the 2nd column intermediate member and the 3rd column intermediate member, and the process of installing a stigma member. 本発明の第２実施形態による柱の構造の一例を示す鉛直断面図である。It is a vertical cross-sectional view which shows an example of the structure of the column by 2nd Embodiment of this invention. 第２柱中間部材を設置する工程を示す図である。It is a figure which shows the process of installing the 2nd pillar intermediate member. 図７に続く第２柱中間部材を設置する工程を示す図である。It is a figure which shows the process of installing the 2nd pillar intermediate member following FIG.

（第１実施形態）
以下、本発明の実施形態による柱の構造について、図１−図５に基づいて説明する。
図１に示すように、本実施形態による柱１の構造は、橋脚柱の構造で、地盤１１に支持される基礎部２と、基礎部２の上部に位置し柱１の基部となる柱基部３と、柱１の頭部となる柱頭部４と、柱基部３と柱頭部４との間の柱中間部５と、を有している。柱頭部４の上方には、桁１２および床版（不図示）が設けられる。 (First Embodiment)
Hereinafter, the structure of the columns according to the embodiment of the present invention will be described with reference to FIGS. 1 to 5.
As shown in FIG. 1, the structure of the column 1 according to the present embodiment is the structure of the pier column, that is, the foundation portion 2 supported by the ground 11 and the column base portion located above the foundation portion 2 and serving as the base of the column 1. It has a pillar head 4, which is the head of the pillar 1, and a pillar intermediate portion 5 between the pillar base 3 and the pillar head 4. A girder 12 and a floor slab (not shown) are provided above the stigma 4.

基礎部２は、鉄筋コンクリート造で、直方体のブロック状に形成された基礎部本体２１と、上下方向に延び下部側が基礎部本体２１に埋設され上部側が基礎部本体２１の上面２１ａから上方に突出する基礎部鉄筋２２（第１鉄筋）と、を有している。
基礎部本体２１には、基礎部鉄筋２２の他に適宜鉄筋が設けられている。
本実施形態では、基礎部鉄筋２２は、基礎部本体２１の上面２１ａから３ｍ以上突出している。 The foundation portion 2 is made of reinforced concrete and has a rectangular parallelepiped block-shaped foundation portion main body 21 and extends in the vertical direction, the lower side is embedded in the foundation portion main body 21 and the upper side protrudes upward from the upper surface 21a of the foundation portion main body 21. It has a foundation reinforcing bar 22 (first reinforcing bar).
The foundation portion main body 21 is appropriately provided with reinforcing bars in addition to the foundation portion reinforcing bars 22.
In the present embodiment, the foundation portion reinforcing bar 22 protrudes by 3 m or more from the upper surface 21a of the foundation portion main body 21.

柱基部３は、プレキャストコンクリート部材で構築されている。柱基部３のプレキャストコンクリート部材を柱基部材３１，３２とする。本実施形態では２つの柱基部材３１，３２が上下に配列されている。
柱基部材３１，３２は、直方体のブロック状に形成されている。柱基部材３１，３２には、上下方向に貫通する第１貫通孔３３が複数形成されている。第１貫通孔３３は、柱基部材３１，３２のコンクリートに埋設されたシース管３４によって形成されている。第１貫通孔３３は、基礎部鉄筋２２が挿通可能な径に形成されている。 The column base 3 is constructed of a precast concrete member. The precast concrete members of the column base 3 are the column base members 31 and 32. In this embodiment, the two column base members 31 and 32 are arranged one above the other.
The column base members 31 and 32 are formed in a rectangular parallelepiped block shape. A plurality of first through holes 33 penetrating in the vertical direction are formed in the column base members 31 and 32. The first through hole 33 is formed by a sheath pipe 34 embedded in the concrete of the column base members 31 and 32. The first through hole 33 is formed to have a diameter through which the foundation reinforcing bar 22 can be inserted.

２つの柱基部材３１，３２のうち、下側の柱基部材を第１柱基部材３１とし、上側の柱基部材を第２柱基部材３２とする。
基礎部２の基礎部本体２１の上に第１柱基部材３１が設置され、第１柱基部材３１の上に第２柱基部材３２が設置される。基礎部本体２１の上面２１ａから突出する基礎部鉄筋２２は、第１柱基部材３１の第１貫通孔３３および第２柱基部材３２の第１貫通孔３３に挿通され、上端部２２ａが第２柱基部材３２の上面３２ａよりも上方に位置している。
第１貫通孔３３の内周面と基礎部鉄筋２２と間には、グラウト材３５が充填されている。 Of the two pillar base members 31 and 32, the lower pillar base member is referred to as the first pillar base member 31, and the upper pillar base member is referred to as the second pillar base member 32.
The first pillar base member 31 is installed on the foundation portion main body 21 of the foundation portion 2, and the second pillar base member 32 is installed on the first pillar base member 31. The foundation reinforcing bar 22 protruding from the upper surface 21a of the foundation body 21 is inserted into the first through hole 33 of the first column base member 31 and the first through hole 33 of the second column base member 32, and the upper end portion 22a is the first. It is located above the upper surface 32a of the two-column base member 32.
A grout material 35 is filled between the inner peripheral surface of the first through hole 33 and the reinforcing bar 22 of the foundation portion.

柱中間部５は、プレキャストコンクリート部材で構築されている。柱中間部５のプレキャストコンクリート部材を柱中間部材５１，５２，５３とする。本実施形態では複数の柱中間部材５１が上下に配列されている。
上下方向に配列される柱中間部材５１，５２，５３のうち、一番下側に設けられる柱中間部材を第１柱中間部材５１とし、上下方向の中間部に設けられる柱中間部材を第２柱中間部材５２とし、一番上側に設けられる柱中間部材を第３柱中間部材５３とする。第２柱中間部材５２は、第１柱中間部材５１と第３柱中間部材５３との間に設けられる。
本実施形態では、複数の第２柱中間部材５２が上下方向に配列して設けられている。 The column intermediate portion 5 is constructed of a precast concrete member. The precast concrete member of the column intermediate portion 5 is referred to as a column intermediate member 51, 52, 53. In this embodiment, a plurality of column intermediate members 51 are arranged vertically.
Of the column intermediate members 51, 52, 53 arranged in the vertical direction, the column intermediate member provided on the lowermost side is the first column intermediate member 51, and the column intermediate member provided in the intermediate portion in the vertical direction is the second column intermediate member. The column intermediate member 52 is used, and the column intermediate member provided on the uppermost side is the third column intermediate member 53. The second pillar intermediate member 52 is provided between the first pillar intermediate member 51 and the third pillar intermediate member 53.
In the present embodiment, a plurality of second pillar intermediate members 52 are provided so as to be arranged in the vertical direction.

第１柱中間部材５１は、直方体のブロック状に形成された第１柱中間部材本体５１１と、上下方向に延び下部側が第１柱中間部材本体５１１に埋設され上部側が第１柱中間部材本体５１１の上面から上方に突出する第１柱中間部材鉄筋５１２（第２鉄筋）と、を有している。
第１柱中間部材本体５１１には、下部側に下側に開口する第１柱中間部材鉄筋継手５１３が設けられている。
第１柱中間部材鉄筋継手５１３は、上方から挿入された鉄筋と下方から挿入された鉄筋とを接合するように構成されている。第１柱中間部材鉄筋継手５１３には、上方から第１柱中間部材鉄筋５１２が挿入されている。
第１柱中間部材５１は、第２柱基部材３２の上に配置される。第１柱中間部材鉄筋継手５１３は、下方から第２柱基部材３２の上面３２ａから突出する基礎部鉄筋２２が挿入され、第１柱中間部材鉄筋５１２と基礎部鉄筋２２とを接合している。第１柱中間部材鉄筋継手５１３は、例えば下側に開口するスリーブで、グラウト材が充填されることで、第１柱中間部材鉄筋５１２と基礎部鉄筋２２とをグラウト材を介して接合する。 The first pillar intermediate member 51 extends vertically and is embedded in the first pillar intermediate member main body 511 formed in a rectangular parallelepiped block shape, and the lower side is embedded in the first pillar intermediate member main body 511, and the upper side is the first pillar intermediate member main body 511. It has a first column intermediate member reinforcing bar 512 (second reinforcing bar) protruding upward from the upper surface of the above.
The first column intermediate member main body 511 is provided with a first column intermediate member reinforcing bar joint 513 that opens downward on the lower side.
The first column intermediate member reinforcing bar joint 513 is configured to join the reinforcing bar inserted from above and the reinforcing bar inserted from below. The first column intermediate member reinforcing bar 512 is inserted into the first column intermediate member reinforcing bar joint 513 from above.
The first pillar intermediate member 51 is arranged on the second pillar base member 32. In the first column intermediate member reinforcing bar joint 513, the foundation portion reinforcing bar 22 protruding from the upper surface 32a of the second column base member 32 is inserted from below, and the first column intermediate member reinforcing bar 512 and the foundation portion reinforcing bar 22 are joined. .. The first column intermediate member reinforcing bar joint 513 is, for example, a sleeve that opens downward, and is filled with a grout material to join the first column intermediate member reinforcing bar 512 and the foundation portion reinforcing bar 22 via the grout material.

第２柱中間部材５２は、直方体のブロック状に形成された第２柱中間部材本体５２１と、上下方向に延び下部側が第２柱中間部材本体５２１に埋設され上部側が第２柱中間部材本体５２１の上面から上方に突出する第２柱中間部材鉄筋５２２と、を有している。
第２柱中間部材本体５２１には、下部側に下側に開口する第２柱中間部材鉄筋継手５２３が設けられている。
第２柱中間部材鉄筋継手５２３は、上方から挿入された鉄筋と下方から挿入された鉄筋とを接合するように構成されている。第２柱中間部材鉄筋継手５２３には、上方から第２柱中間部材鉄筋５２２が挿入されている。 The second pillar intermediate member 52 is a rectangular parallelepiped block-shaped second pillar intermediate member main body 521, and the lower side is embedded in the second pillar intermediate member main body 521 and the upper side is the second pillar intermediate member main body 521. It has a second column intermediate member reinforcing bar 522 protruding upward from the upper surface of the above.
The second column intermediate member main body 521 is provided with a second column intermediate member reinforcing bar joint 523 that opens downward on the lower side.
The second column intermediate member reinforcing bar joint 523 is configured to join the reinforcing bar inserted from above and the reinforcing bar inserted from below. The second column intermediate member reinforcing bar 522 is inserted into the second column intermediate member reinforcing bar joint 523 from above.

第２柱中間部材５２のうちの一番下の第２柱中間部材５２は、第１柱中間部材５１の上に配置される。第２柱中間部材鉄筋継手５２３は、下方から第１柱中間部材５１の上面から突出する第１柱中間部材鉄筋５１２が挿入され、第２柱中間部材鉄筋５２２と第１柱中間部材鉄筋５１２とを接合している。第２柱中間部材鉄筋継手５２３は、例えば下側に開口するスリーブで、グラウト材が充填されることで、第２柱中間部材鉄筋５２２と第１柱中間部材鉄筋５１２とをグラウト材を介して接合する。
第２柱中間部材５２のうちの下から２番目よりも上側の第２柱中間部材５２は、下側の第２柱中間部材５２の上に配置される。第２柱中間部材鉄筋継手５２３は、下方から下側の第２柱中間部材５２の上面から突出する第２柱中間部材鉄筋５２２が挿入され、上側から挿入された第２柱中間部材鉄筋５２２と下側から挿入された第２柱中間部材鉄筋５２２とを接合している。 The lowermost second pillar intermediate member 52 of the second pillar intermediate member 52 is arranged on the first pillar intermediate member 51. In the second column intermediate member reinforcing bar joint 523, the first column intermediate member reinforcing bar 512 protruding from the upper surface of the first column intermediate member 51 is inserted, and the second column intermediate member reinforcing bar 522 and the first column intermediate member reinforcing bar 512 are inserted. Are joined. The second column intermediate member reinforcing bar joint 523 is, for example, a sleeve that opens downward, and is filled with a grout material to connect the second column intermediate member reinforcing bar 522 and the first column intermediate member reinforcing bar 512 via the grout material. Join.
The second pillar intermediate member 52 above the second from the bottom of the second pillar intermediate member 52 is arranged on the lower second pillar intermediate member 52. In the second column intermediate member reinforcing bar joint 523, the second column intermediate member reinforcing bar 522 protruding from the upper surface of the second column intermediate member 52 from the lower side to the lower side is inserted, and the second column intermediate member reinforcing bar 522 inserted from the upper side and the second column intermediate member reinforcing bar 522. It is joined to the second column intermediate member reinforcing bar 522 inserted from the lower side.

第３柱中間部材５３は、直方体のブロック状に形成された第３柱中間部材本体５３１と、上下方向に延び第３柱中間部材本体５３１に埋設された第３柱中間部材鉄筋５３２と、を有している。
第３柱中間部材本体５３１には、下部側に下側に開口する第３柱中間部材下側鉄筋継手５３３が設けられ、上部側に上側に開口する第３柱中間部材上側鉄筋継手５３４が設けられている。
第３柱中間部材下側鉄筋継手５３３および第３柱中間部材上側鉄筋継手５３４は、それぞれ上方から挿入された鉄筋と下方から挿入された鉄筋とを接合するように構成されている。
第３柱中間部材鉄筋５３２は、下部側が第３柱中間部材下側鉄筋継手５３３に上側から挿入され、上部側が第３柱中間部材上側鉄筋継手５３４に下側から挿入されている。
第３柱中間部材５３は、一番上の第２柱中間部材５２の上に配置される。第３柱中間部材下側鉄筋継手５３３は、下方から第２柱中間部材本体５２１の上面から突出する第２柱中間部材鉄筋５２２が挿入され、第３柱中間部材鉄筋５３２と第２柱中間部材鉄筋５２２とを接合している。第３柱中間部材上側鉄筋継手５３４は、例えば下側に開口するスリーブで、グラウト材が充填されることで、第３柱中間部材鉄筋５３２と第２柱中間部材鉄筋５２２とをグラウト材を介して接合する。 The third column intermediate member 53 includes a third column intermediate member main body 531 formed in a rectangular parallelepiped shape, and a third column intermediate member reinforcing bar 532 extending in the vertical direction and embedded in the third column intermediate member main body 531. Have.
The third column intermediate member main body 531 is provided with a third column intermediate member lower reinforcing bar joint 533 that opens downward on the lower side, and a third column intermediate member upper reinforcing bar joint 534 that opens upward on the upper side. Has been done.
The lower reinforcing bar joint 533 of the third column intermediate member and the upper reinforcing bar joint 534 of the third column intermediate member are configured to join the reinforcing bar inserted from above and the reinforcing bar inserted from below, respectively.
The lower side of the third column intermediate member reinforcing bar 532 is inserted into the third column intermediate member lower reinforcing bar joint 533 from the upper side, and the upper side is inserted into the third column intermediate member upper reinforcing bar joint 534 from the lower side.
The third pillar intermediate member 53 is arranged on the uppermost second pillar intermediate member 52. The second column intermediate member reinforcing bar 522 protruding from the upper surface of the second column intermediate member main body 521 is inserted into the third column intermediate member lower reinforcing bar joint 533, and the third column intermediate member reinforcing bar 532 and the second column intermediate member are inserted. It is joined to the reinforcing bar 522. The third column intermediate member upper reinforcing bar joint 534 is, for example, a sleeve that opens downward, and is filled with a grout material to connect the third column intermediate member reinforcing bar 532 and the second column intermediate member reinforcing bar 522 via the grout material. To join.

柱頭部４は、プレキャストコンクリート部材で構築されている。柱中間部５のプレキャストコンクリート部材を柱頭部材４１とする。本実施形態では、１つの柱頭部材４１が設けられている。
柱頭部材４１は、直方体のブロック状に形成されている。柱頭部材４１には、上下方向に貫通する第２貫通孔４２が複数形成されている。第２貫通孔４２は、柱頭部材４１のコンクリートに埋設されたシース管によって形成されている。第２貫通孔４２は、後述する柱頭部鉄筋４３（第３鉄筋）が挿通可能な径に形成されている。 The stigma 4 is constructed of precast concrete members. The precast concrete member of the column intermediate portion 5 is referred to as a stigma member 41. In this embodiment, one stigma member 41 is provided.
The stigma member 41 is formed in a rectangular parallelepiped block shape. The stigma member 41 is formed with a plurality of second through holes 42 penetrating in the vertical direction. The second through hole 42 is formed by a sheath pipe embedded in the concrete of the stigma member 41. The second through hole 42 is formed to have a diameter through which the stigma head reinforcing bar 43 (third reinforcing bar), which will be described later, can be inserted.

柱頭部材４１は、第３柱中間部材５３の上に配置され、第２貫通孔４２が、第３柱中間部材上側鉄筋継手５３４の上に配置されている。
柱頭部材４１の第２貫通孔４２に挿通される柱頭部鉄筋４３は、上下方向に延び、下端部分が第３柱中間部材上側鉄筋継手５３４に上側から挿入されて第３柱中間部材鉄筋５３２と接合され、その上側の中間部分が第２貫通孔４２の内部に配置され、更にその上側の上部側が柱頭部材４１の上面４１ａよりも上方に突出している。
第２貫通孔４２の内周面と柱頭部鉄筋４３と間には、グラウト材４４が充填されている。
柱頭部鉄筋４３における柱頭部材４１の上面４１ａよりも上側に突出する部分は、柱頭部材４１の上に設けられる桁１２および床版（不図示）に埋設されている。 The stigma member 41 is arranged on the third column intermediate member 53, and the second through hole 42 is arranged on the upper reinforcing bar joint 534 of the third column intermediate member.
The stigma head reinforcing bar 43 inserted into the second through hole 42 of the stigma member 41 extends in the vertical direction, and the lower end portion is inserted into the third column intermediate member upper reinforcing bar joint 534 from above to form the third column intermediate member reinforcing bar 532. It is joined, and the middle portion on the upper side thereof is arranged inside the second through hole 42, and the upper side on the upper side thereof protrudes upward from the upper surface 41a of the stigma member 41.
A grout material 44 is filled between the inner peripheral surface of the second through hole 42 and the stigma reinforcing bar 43.
A portion of the stigma reinforcing bar 43 that protrudes upward from the upper surface 41a of the stigma member 41 is embedded in a girder 12 and a floor slab (not shown) provided on the stigma member 41.

第１実施形態による柱１の施工方法について説明する。
図２に示すように、基礎部２を構築し、基礎部本体２１の上面２１ａから基礎部鉄筋２２を突出させる。 The construction method of the pillar 1 according to the first embodiment will be described.
As shown in FIG. 2, the foundation portion 2 is constructed, and the foundation portion reinforcing bar 22 is projected from the upper surface 21a of the foundation portion main body 21.

図３に示すように、基礎部本体２１の上に第１柱基部材３１を据え付けし、第１柱基部材３１の第１貫通孔３３に基礎部鉄筋２２を挿通させる。第１柱基部材３１の上に第２柱基部材３２を据え付けし、第２柱基部材３２の第１貫通孔３３に基礎部鉄筋２２を挿通させる。基礎部鉄筋２２の上端部２２ａは、第２柱基部材３２の上面３２ａよりも上方に突出させる。
基礎部本体２１と第１柱基部材３１との間の目地部、および第１柱基部材３１と第２柱基部材３２との間の目地部の型枠（不図示）を設ける。
第１柱基部材３１および第２柱基部材３２の第１貫通孔３３にグラウト材３５を充填し、基礎部鉄筋２２と第１柱基部材３１および第２柱基部材３２とを接合する。目地部にモルタルなどの目地材を充填し、型枠を外す。 As shown in FIG. 3, the first column base member 31 is installed on the foundation main body 21, and the foundation reinforcing bar 22 is inserted into the first through hole 33 of the first column base member 31. The second column base member 32 is installed on the first column base member 31, and the foundation reinforcing bar 22 is inserted into the first through hole 33 of the second column base member 32. The upper end portion 22a of the foundation portion reinforcing bar 22 is projected upward from the upper surface 32a of the second column base member 32.
Formwork (not shown) of the joint portion between the base portion main body 21 and the first pillar base member 31 and the joint portion between the first pillar base member 31 and the second pillar base member 32 is provided.
The first through hole 33 of the first column base member 31 and the second column base member 32 is filled with the grout material 35, and the foundation reinforcing bar 22 is joined to the first column base member 31 and the second column base member 32. Fill the joints with joint material such as mortar and remove the formwork.

図４に示すように、第２柱基部材３２の上に第１柱中間部材５１を据え付けし、第１柱中間部材５１の第１柱中間部材鉄筋継手５１３に基礎部鉄筋２２における第２柱基部材３２の上面３２ａよりも上方に突出している部分を下方から挿入させる。第２柱基部材３２と第１柱中間部材５１との間の目地部の型枠（不図示）を設ける。
図４では、第１柱中間部材５１の上に第２柱中間部材５２が設けられているが、第２柱基部材３２と第１柱中間部材５１とを接合してから、第１柱中間部材５１の上に第２柱中間部材５２を設置して接合する。
第１柱中間部材鉄筋継手５１３にグラウト材５４を充填して、基礎部鉄筋２２と第１柱中間部材鉄筋５１２とを接合する。目地部にモルタルなどの目地材を充填し、型枠を外す。 As shown in FIG. 4, the first column intermediate member 51 is installed on the second column base member 32, and the second column in the foundation reinforcing bar 22 is attached to the first column intermediate member reinforcing bar joint 513 of the first column intermediate member 51. A portion of the base member 32 protruding above the upper surface 32a is inserted from below. A formwork (not shown) of the joint portion between the second pillar base member 32 and the first pillar intermediate member 51 is provided.
In FIG. 4, the second pillar intermediate member 52 is provided on the first pillar intermediate member 51, but after joining the second pillar base member 32 and the first pillar intermediate member 51, the first pillar intermediate member is intermediate. The second pillar intermediate member 52 is installed on the member 51 and joined.
The grout material 54 is filled in the first column intermediate member reinforcing bar joint 513 to join the foundation portion reinforcing bar 22 and the first column intermediate member reinforcing bar 512. Fill the joints with joint material such as mortar and remove the formwork.

第１柱中間部材５１の上に第２柱中間部材５２を据え付けし、第２柱中間部材鉄筋継手５２３に第１柱中間部材鉄筋５１２における第１柱中間部材本体５１１の上面よりも上方に突出する部分を下方から挿入させる。
第１柱中間部材５１と第２柱中間部材５２との間の目地部の型枠（不図示）を設ける。
第２柱中間部材鉄筋継手５２３にグラウト材５４を充填して、第１柱中間部材鉄筋５１２と第２柱中間部材鉄筋継手５２３とを接合する。目地部にモルタルなどの目地材を充填し、型枠を外す。 The second column intermediate member 52 is installed on the first column intermediate member 51, and the second column intermediate member 52 protrudes upward from the upper surface of the first column intermediate member main body 511 of the first column intermediate member reinforcing bar 512 in the second column intermediate member reinforcing bar joint 523. Insert the part to be used from below.
A formwork (not shown) of the joint portion between the first pillar intermediate member 51 and the second pillar intermediate member 52 is provided.
The grout material 54 is filled in the second column intermediate member reinforcing bar joint 523, and the first column intermediate member reinforcing bar 512 and the second column intermediate member reinforcing bar joint 523 are joined. Fill the joints with joint material such as mortar and remove the formwork.

図５に示すように、既に設置された第２柱中間部材５２の上に、その上に配置される第２柱中間部材５２を据え付ける。上側の第２柱中間部材５２の第２柱中間部材鉄筋継手５２３に、下側の第２柱中間部材５２の第２柱中間部材鉄筋５２２おける下側の第２柱中間部材５２の第２柱中間部材本体５２１の上面から上方に突出している部分を下方から挿入させる。上側の第２柱基部材３２と下側の第２柱基部材３２との間の目地部の型枠（不図示）を設ける。
図５では、すべての第２柱中間部材５２、第３柱中間部材５３および柱頭部材４１が設けられているが、１つずつ第２柱中間部材５２を設置する。
第２柱中間部材鉄筋継手５２３にグラウト材５４を充填して、下側の第２柱中間部材５２の第２柱中間部材鉄筋５２２と上側の第２柱中間部材５２の第２柱中間部材鉄筋５２２とを接合する。目地部にモルタルなどの目地材を充填し、型枠を外す。 As shown in FIG. 5, the second pillar intermediate member 52 arranged on the second pillar intermediate member 52 already installed is installed on the second pillar intermediate member 52. The second column of the second column intermediate member 52 of the lower second column intermediate member 52 in the second column intermediate member reinforcing bar 522 of the lower second column intermediate member 52 to the second column intermediate member reinforcing bar joint 523 of the upper second column intermediate member 52. A portion of the intermediate member main body 521 protruding upward from the upper surface is inserted from below. A formwork (not shown) of a joint portion between the upper second pillar base member 32 and the lower second pillar base member 32 is provided.
In FIG. 5, all the second column intermediate members 52, the third column intermediate members 53, and the stigma members 41 are provided, but the second column intermediate members 52 are installed one by one.
The second column intermediate member reinforcing bar joint 523 is filled with the grout material 54, and the second column intermediate member reinforcing bar 522 of the lower second column intermediate member 52 and the second column intermediate member reinforcing bar of the upper second column intermediate member 52 are filled. Join with 522. Fill the joints with joint material such as mortar and remove the formwork.

一番上の第２柱中間部材５２の上に第３柱中間部材５３を据え付けし、第３柱中間部材下側鉄筋継手５３３に下側の第２柱中間部材本体５２１の上面から上方に突出する第２柱中間部材鉄筋５２２を下方から挿入させる。
第２柱中間部材５２と第３柱中間部材５３との間の目地部の型枠（不図示）を設ける。
第３柱中間部材下側鉄筋継手５３３にグラウト材５４を充填して、第２柱中間部材５２の第２柱中間部材鉄筋５２２と第３柱中間部材５３の第３柱中間部材鉄筋５３２とを接合する。目地部にモルタルなどの目地材を充填し、型枠を外す。 The third column intermediate member 53 is installed on the uppermost second column intermediate member 52, and the third column intermediate member 53 projects upward from the upper surface of the lower second column intermediate member main body 521 to the lower reinforcing bar joint 533 of the third column intermediate member. The second column intermediate member reinforcing bar 522 is inserted from below.
A formwork (not shown) of the joint portion between the second pillar intermediate member 52 and the third pillar intermediate member 53 is provided.
The grout material 54 is filled in the lower reinforcing bar joint 533 of the third column intermediate member, and the second column intermediate member reinforcing bar 522 of the second column intermediate member 52 and the third column intermediate member reinforcing bar 532 of the third column intermediate member 53 are formed. Join. Fill the joints with joint material such as mortar and remove the formwork.

第３柱中間部材５３の上に柱頭部材４１を据え付けし、柱頭部材４１の第２貫通孔４２を第３柱中間部材５３の第３柱中間部材上側鉄筋継手５３４の上に配置する。
図１に示すように、柱頭部材４１の上方から柱頭部材４１の第２貫通孔４２に柱頭部鉄筋４３を挿通し、柱頭部鉄筋４３の下端部分を第３柱中間部材上側鉄筋継手５３４に挿通する。
第３柱中間部材５３と柱頭部材４１との間の目地部の型枠（不図示）を設ける。
第３柱中間部材上側鉄筋継手５３４におよび第２貫通孔４２にグラウト材４４を充填して、第３柱中間部材鉄筋５３２と柱頭部鉄筋４３とを接合する。目地部にモルタルなどの目地材を充填し、型枠を外す。 The stigma member 41 is installed on the third column intermediate member 53, and the second through hole 42 of the stigma member 41 is arranged on the third column intermediate member upper reinforcing bar joint 534 of the third column intermediate member 53.
As shown in FIG. 1, the stigma head reinforcing bar 43 is inserted into the second through hole 42 of the stigma member 41 from above the stigma member 41, and the lower end portion of the stigma head reinforcing bar 43 is inserted into the third pillar intermediate member upper reinforcing bar joint 534. do.
A formwork (not shown) of the joint portion between the third column intermediate member 53 and the stigma member 41 is provided.
The third column intermediate member upper reinforcing bar joint 534 and the second through hole 42 are filled with the grout material 44 to join the third column intermediate member reinforcing bar 532 and the capital head reinforcing bar 43. Fill the joints with joint material such as mortar and remove the formwork.

柱頭部材４１の上部に桁１２および床版（付図示）を構築し、柱頭部鉄筋４３を桁１２および床版に埋設して接合する。
このようにして柱１が構築される。 A girder 12 and a floor slab (shown) are constructed on the upper part of the stigma member 41, and the stigma reinforcing bar 43 is embedded in the girder 12 and the floor slab and joined.
In this way, the pillar 1 is constructed.

次に、上記の第１実施形態による柱１の構造の作用・効果について説明する。
上記の第１実施形態による柱１の構造では、柱基部材３１は、上下方向に貫通する第１貫通孔３３を有し、基礎部２の基礎部鉄筋２２が挿通され、基礎部鉄筋２２が柱基部材３１よりも上方で柱中間部５の第１柱中間部材鉄筋５１２と接合されることにより、柱基部３に鉄筋継手がない構造とすることができる。一般に、耐震設計において柱基部３の塑性化を許容する場合には、柱基部３に鉄筋継手がない構造としなければならない。本実施形態では、柱基部３に鉄筋継手がない構造とすることができるため、柱基部３をプレキャストコンクリート部材とした場合でも耐震設計において柱基部３の塑性化を許容する設計とすることができる。すなわち、耐震設計において柱基部３の塑性化を許容する場合でも、柱基部３にプレキャストコンクリート部材を使用することができる。 Next, the action / effect of the structure of the pillar 1 according to the first embodiment will be described.
In the structure of the column 1 according to the first embodiment, the column base member 31 has a first through hole 33 penetrating in the vertical direction, the foundation reinforcing bar 22 of the foundation portion 2 is inserted, and the foundation reinforcing bar 22 is inserted. By joining to the first column intermediate member reinforcing bar 512 of the column intermediate portion 5 above the column base member 31, it is possible to form a structure in which the column base portion 3 does not have a reinforcing bar joint. Generally, when plasticization of the column base 3 is allowed in the seismic design, the column base 3 must have a structure without a reinforcing bar joint. In the present embodiment, since the column base 3 can have a structure without a reinforcing bar joint, the column base 3 can be designed to allow plasticization in the seismic design even when the column base 3 is a precast concrete member. .. That is, a precast concrete member can be used for the column base 3 even when the column base 3 is allowed to be plasticized in the seismic design.

また、上記の第１実施形態による柱１の構造では、柱基部３は、複数の柱基部材３１が上下方向に複数配列され、基礎部鉄筋２２は、複数の柱基部材３１それぞれの第１貫通孔３３を貫通して、最上の柱基部材３１よりも上方に突出し、最上の柱基部材３１よりも上方で柱中間部５の第１柱中間部材鉄筋５１２と接合されている。
このような構成とすることにより、柱基部３が複数の柱基部材３１が配列される構造であっても、柱基部３を鉄筋継手がない構造とすることができる。 Further, in the structure of the column 1 according to the first embodiment, the column base portion 3 has a plurality of column base members 31 arranged in the vertical direction, and the foundation portion reinforcing bar 22 is the first of each of the plurality of column base members 31. It penetrates the through hole 33, protrudes upward from the uppermost column base member 31, and is joined to the first column intermediate member reinforcing bar 512 of the column intermediate portion 5 above the uppermost column base member 31.
With such a configuration, even if the column base 3 has a structure in which a plurality of column base members 31 are arranged, the column base 3 can have a structure without a reinforcing bar joint.

また、上記の第１実施形態による柱１の構造では、第１柱中間柱部材５１は、第１中間柱部材本体５１１と、中間柱部材本体５１１に埋設される第１柱中間部材鉄筋５１２と、を有している。中間柱部材本体５１１には、下側に開口し第１柱中間部材鉄筋５１２が配置されたスリーブ（第１柱中間部材鉄筋継手５１３）が設けられている。スリーブにグラウト材が充填されることで、基礎部鉄筋２２と第１柱中間部材鉄筋５１２とをグラウト材を介して接合される。
このような構成とすることにより、基礎部鉄筋２２と第１柱中間部材鉄筋５１２とを直接接合しなくてよい。このため、基礎部鉄筋２２と第１柱中間部材鉄筋５１２とを直接接合する重ね継手や溶接継手等を設ける作業がなく、第１柱基部材３１および第２柱基部材３２の第１貫通孔３３に挿通された基礎部鉄筋２２の定着と、基礎部鉄筋２２と第１柱中間部材鉄筋５１２との接合を同時に施工することができる。その結果、柱１の施工工期を短縮することができる。 Further, in the structure of the column 1 according to the first embodiment, the first column intermediate column member 51 includes the first intermediate column member main body 511 and the first column intermediate member reinforcing bar 512 embedded in the intermediate column member main body 511. ,have. The intermediate column member main body 511 is provided with a sleeve (first column intermediate member reinforcing bar joint 513) that opens downward and is arranged with the first column intermediate member reinforcing bar 512. By filling the sleeve with a grout material, the foundation portion reinforcing bar 22 and the first column intermediate member reinforcing bar 512 are joined via the grout material.
With such a configuration, it is not necessary to directly join the foundation portion reinforcing bar 22 and the first column intermediate member reinforcing bar 512. Therefore, there is no work of providing a lap joint, a welded joint, or the like that directly joins the foundation portion reinforcing bar 22 and the first column intermediate member reinforcing bar 512, and the first through hole of the first column base member 31 and the second column base member 32. The fixing of the foundation reinforcing bar 22 inserted through the 33 and the joining of the foundation reinforcing bar 22 and the first column intermediate member reinforcing bar 512 can be performed at the same time. As a result, the construction period of the pillar 1 can be shortened.

また、上記の第１実施形態による柱１の構造では、柱頭部材４１は、上下方向に貫通する第２貫通孔４２を有し、第２貫通孔４２に下側から柱頭部鉄筋４３が挿通された状態で第３柱中間部材本体５３１の上に設置され、柱頭部鉄筋４３は、柱頭部材４１よりも上方に突出し、柱頭部材４１よりも上方において柱頭部材４１の上に設けられる部材（桁１２および床版）と接合されている。
このような構成とすることにより、柱頭部４についても鉄筋継手のない構造とすることができる。このため、耐震設計において柱頭部４の塑性化を許容する設計とする際にも、柱頭部４にプレキャストコンクリート部材を使用することができる。 Further, in the structure of the column 1 according to the first embodiment, the stigma member 41 has a second through hole 42 penetrating in the vertical direction, and the stigma reinforcing bar 43 is inserted into the second through hole 42 from below. In this state, the column head reinforcing bar 43 is installed on the third column intermediate member main body 531 and protrudes upward from the stigma member 41, and is provided on the stigma member 41 above the stigma member 41 (girder 12). And floor slab).
With such a configuration, the stigma 4 can also have a structure without a reinforcing bar joint. Therefore, a precast concrete member can be used for the stigma 4 even when the seismic design allows plasticization of the stigma 4.

（第２実施形態）
次に、第２実施形態について、添付図面に基づいて説明するが、上述の第１実施形態と同一又は同様な部材、部分には同一の符号を用いて説明を省略し、実施形態と異なる構成について説明する。
図６に示すように、第２実施形態による柱１Ｂの構造は、第１実施形態による柱１の構造と、第１柱中間部材５１および第２柱中間部材５２の形態が異なっている。 (Second Embodiment)
Next, the second embodiment will be described with reference to the accompanying drawings, but the same or similar members and parts as those in the first embodiment will be described by using the same reference numerals, and the description will be omitted, and the configuration will be different from that of the first embodiment. Will be described.
As shown in FIG. 6, the structure of the pillar 1B according to the second embodiment is different from the structure of the pillar 1 according to the first embodiment in the form of the first pillar intermediate member 51 and the second pillar intermediate member 52.

第２実施形態の第１柱中間部材５１Ｂは、第３柱中間部材５３と同様に、下部側と上部側とに鉄筋継手が設けられている。第１柱中間部材５１Ｂの下部側に設けられる鉄筋継手を第１柱中間部材下側鉄筋継手５１５とし、上部側に設けられる鉄筋継手を第１柱中間部材上側鉄筋継手５１６とする。第２実施形態の第１柱中間部材鉄筋５１２Ｂは、下部側が第１柱中間部材下側鉄筋継手５１５の上部側に挿入され、上部側が第１柱中間部材上側鉄筋継手５１６の下部側に挿入されている。 Similar to the third column intermediate member 53, the first column intermediate member 51B of the second embodiment is provided with reinforcing bar joints on the lower side and the upper side. The reinforcing bar joint provided on the lower side of the first column intermediate member 51B is referred to as the lower reinforcing bar joint 515 of the first column intermediate member, and the reinforcing bar joint provided on the upper side is referred to as the upper reinforcing bar joint 516 of the first column intermediate member. In the first column intermediate member reinforcing bar 512B of the second embodiment, the lower side is inserted into the upper side of the first column intermediate member lower reinforcing bar joint 515, and the upper side is inserted into the lower side of the first column intermediate member upper reinforcing bar joint 516. ing.

第２実施形態の第２柱中間部材５２Ｂは、鉄筋継手が設けられておらず、第２柱中間部材本体５２１Ｂに上下方向に貫通する第３貫通孔５２７が形成されている。第３貫通孔５２７は、第２柱中間部材本体５２１Ｂのコンクリートに埋設されたシース管によって形成されている。第３貫通孔５２７は、第３鉄筋５５が挿通可能な径に形成されている。
複数の第２柱中間部材５２Ｂが上下方向に配列されると、それぞれの第３貫通孔５２７が上下方向に重なって配置される。 The second column intermediate member 52B of the second embodiment is not provided with a reinforcing bar joint, and a third through hole 527 that penetrates in the vertical direction is formed in the second column intermediate member main body 521B. The third through hole 527 is formed by a sheath pipe embedded in concrete of the second pillar intermediate member main body 521B. The third through hole 527 is formed to have a diameter through which the third reinforcing bar 55 can be inserted.
When the plurality of second pillar intermediate members 52B are arranged in the vertical direction, the third through holes 527 are arranged so as to overlap each other in the vertical direction.

複数の第２柱中間部材５２それぞれの第３貫通孔５２７には、第３鉄筋５５が挿入される。第３鉄筋５５は、上下方向に延び、下端部分が第１柱中間部材上側鉄筋継手５１６に上側から挿入されて第１柱中間部材鉄筋５１２Ｂと接合され、その上側の中間部分が複数の第２柱中間部材５２それぞれの第３貫通孔５２７の内部に配置され、更にその上側の上端部分が第３柱中間部材下側鉄筋継手５３３に下側から挿入されて第３柱中間部材鉄筋５３２と接合されている。 A third reinforcing bar 55 is inserted into the third through hole 527 of each of the plurality of second column intermediate members 52. The third reinforcing bar 55 extends in the vertical direction, and the lower end portion is inserted into the first column intermediate member upper reinforcing bar joint 516 from above and joined to the first column intermediate member reinforcing bar 512B, and the upper intermediate portion thereof is a plurality of second. It is arranged inside the third through hole 527 of each column intermediate member 52, and the upper end portion of the upper end thereof is inserted into the lower reinforcing bar joint 533 of the third column intermediate member from the lower side and joined to the third column intermediate member reinforcing bar 532. Has been done.

第２実施形態による柱１Ｂの施工方法について説明する。
第２実施形態では、第１実施形態と同様に基礎部２、柱基部３およびを施工し、第１実施形態の第１柱中間部材５１と同様に柱基部３の上側に第１柱中間部材５１Ｂを施工する。 The construction method of the pillar 1B according to the second embodiment will be described.
In the second embodiment, the foundation portion 2, the column base portion 3 and the like are constructed as in the first embodiment, and the first column intermediate member is installed on the upper side of the column base portion 3 as in the first column intermediate member 51 of the first embodiment. Install 51B.

図７に示すように、第１柱中間部材５１Ｂの上に複数の第２柱中間部材５２Ｂを据え付ける。複数の第２柱中間部材５２Ｂそれぞれの第３貫通孔５２７を上下方向に重なって配置する。
図８に示すように、複数の第２柱中間部材５２Ｂそれぞれの第３貫通孔５２７に第３鉄筋５５を挿通させる。第３鉄筋５５の下端部分は、第１柱中間部材上側鉄筋継手５１６に挿入する。第３鉄筋５５の上端部分は、一番上の第２柱中間部材５２Ｂの上面から上方に突出させる。
第１柱中間部材上側鉄筋継手５１６にグラウト材５６を充填して、第１柱中間部材鉄筋５１２Ｂと第３鉄筋５５とを接合する。複数の第２柱中間部材５２Ｂそれぞれの第３貫通孔５２７にグラウト材５７を充填して、第３鉄筋５５を複数の第２柱中間部材５２Ｂそれぞれと接合する。 As shown in FIG. 7, a plurality of second pillar intermediate members 52B are installed on the first pillar intermediate member 51B. The third through holes 527 of each of the plurality of second pillar intermediate members 52B are arranged so as to overlap in the vertical direction.
As shown in FIG. 8, the third reinforcing bar 55 is inserted into the third through hole 527 of each of the plurality of second column intermediate members 52B. The lower end portion of the third reinforcing bar 55 is inserted into the upper reinforcing bar joint 516 of the first column intermediate member. The upper end portion of the third reinforcing bar 55 projects upward from the upper surface of the uppermost second column intermediate member 52B.
The grout material 56 is filled in the upper reinforcing bar joint 516 of the first column intermediate member, and the first column intermediate member reinforcing bar 512B and the third reinforcing bar 55 are joined. The grout material 57 is filled in the third through hole 527 of each of the plurality of second column intermediate members 52B, and the third reinforcing bar 55 is joined to each of the plurality of second column intermediate members 52B.

図６に示すように、第２柱中間部材５２Ｂの上に第３柱中間部材５３を据え付ける。第３鉄筋５５の上端部分を第３柱中間部材下側鉄筋継手５３３に挿入する。第３柱中間部材下側鉄筋継手５３３にグラウト材５４を充填して、と第３鉄筋５５と第３柱中間部材鉄筋５３２とを接合する。
柱頭部材４１および柱頭部材４１の上側の桁１２および床版（不図示）を第１実施形態と同様に施工する。
このようにして柱１Ｂが構築される。 As shown in FIG. 6, the third pillar intermediate member 53 is installed on the second pillar intermediate member 52B. The upper end portion of the third reinforcing bar 55 is inserted into the lower reinforcing bar joint 533 of the third column intermediate member. The grout material 54 is filled in the lower reinforcing bar joint 533 of the third column intermediate member, and the third reinforcing bar 55 and the third column intermediate member reinforcing bar 532 are joined.
The stigma member 41, the upper girder 12 of the stigma member 41, and the floor slab (not shown) are constructed in the same manner as in the first embodiment.
In this way, the pillar 1B is constructed.

上記の第２実施形態による柱１Ｂの構造では、第１実施形態による柱１の構造と同様の効果を奏する。
更に、第２実施形態による柱１Ｂの構造では、複数の第２柱中間部材５２に鉄筋継手を設けず、複数の第２柱中間部材５２それぞれの第３貫通孔５２７に第３鉄筋５５を挿通して接合する構造とすることにより、第２柱中間部材５２の接合を容易に行うことができる。 The structure of the pillar 1B according to the second embodiment has the same effect as the structure of the pillar 1 according to the first embodiment.
Further, in the structure of the column 1B according to the second embodiment, the reinforcing bar joint is not provided in the plurality of second column intermediate members 52, and the third reinforcing bar 55 is inserted into the third through hole 527 of each of the plurality of second column intermediate members 52. The second pillar intermediate member 52 can be easily joined by forming the structure for joining.

以上、本発明による柱１の構造の実施形態について説明したが、本発明は上記の実施形態に限定されるものではなく、その趣旨を逸脱しない範囲で適宜変更可能である。
例えば、上記の実施形態では、柱基部３は、２つの柱基部材３１が上下方向に複数配列されているが、１つの柱基部材３１や、３つ以上の柱基部材３１で構成されていてもよい。柱基部材３１、柱中間部材５１および柱頭部材４１の数や形状は適宜設定されてよい。 Although the embodiment of the structure of the pillar 1 according to the present invention has been described above, the present invention is not limited to the above embodiment and can be appropriately modified without departing from the spirit of the present invention.
For example, in the above embodiment, the pillar base portion 3 is composed of one pillar base member 31 and three or more pillar base members 31, although a plurality of two pillar base members 31 are arranged in the vertical direction. You may. The number and shape of the column base member 31, the column intermediate member 51, and the stigma member 41 may be appropriately set.

上記の実施形態では、第３柱中間部材５３は、下部側に下側に開口する第３柱中間部材下側鉄筋継手５３３が設けられ、上部側に上側に開口する第３柱中間部材上側鉄筋継手５３４が設けられている。第３柱中間部材鉄筋５３２は、下部側が第３柱中間部材下側鉄筋継手５３３に上側から挿入され、上部側が第３柱中間部材上側鉄筋継手５３４に下側から挿入されている。
これに対し、第３柱中間部材５３は、下部側に下側に開口する第３柱中間部材下側鉄筋継手５３３のみが設けられ、第３柱中間部材鉄筋５３２の上部側が第３柱中間部材本体５３１の上面よりも上方に突出して、柱頭部材４１の第２貫通孔４２を貫通し、上端部分が柱頭部材４１の上方で桁１２および床版と接合されていてもよい。 In the above embodiment, the third column intermediate member 53 is provided with a third column intermediate member lower reinforcing bar joint 533 that opens downward on the lower side, and the third column intermediate member upper reinforcing bar that opens upward on the upper side. A joint 534 is provided. The lower side of the third column intermediate member reinforcing bar 532 is inserted into the third column intermediate member lower reinforcing bar joint 533 from the upper side, and the upper side is inserted into the third column intermediate member upper reinforcing bar joint 534 from the lower side.
On the other hand, the third column intermediate member 53 is provided with only the third column intermediate member lower reinforcing bar joint 533 that opens downward on the lower side, and the upper side of the third column intermediate member reinforcing bar 532 is the third column intermediate member. It may protrude upward from the upper surface of the main body 531 and penetrate the second through hole 42 of the stigma member 41, and the upper end portion may be joined to the girder 12 and the floor slab above the stigma member 41.

上記の実施形態では、柱頭部材４１には、鉄筋継手が設けられていないが、鉄筋継手が設けられていてもよい。 In the above embodiment, the stigma member 41 is not provided with a reinforcing bar joint, but a reinforcing bar joint may be provided.

１，１Ｂ 柱
２ 基礎部
３ 柱基部
４ 柱頭部
５ 柱中間部
１１ 地盤
１２ 桁（柱頭部材の上に設けられる部材）
２１ 基礎部本体
２２ 基礎部鉄筋（第１鉄筋）
３１ 第１柱基部材（柱基部材）
３２ 第２柱基部材（柱基部材）
３３ 第１貫通孔
４１ 柱頭部材
４２ 第２貫通孔
４３ 柱頭部鉄筋（第３鉄筋）
５１，５１Ｂ 第１柱中間部材（柱中間部材）
５２，５２Ｂ 第２柱中間部材（柱中間部材）
５３ 第３柱中間部材（柱中間部材）
５１１ 第１柱中間部材本体（柱中間部材本体）
５１２ 第１柱中間部材鉄筋（第２鉄筋） 1,1B Pillar 2 Foundation part 3 Pillar base 4 Pillar head 5 Pillar middle part 11 Ground 12 girders (members provided on the stigma member)
21 Foundation body 22 Foundation rebar (first rebar)
31 First pillar base member (pillar base member)
32 Second pillar base member (pillar base member)
33 1st through hole 41 Capital member 42 2nd through hole 43 Capital reinforcement (3rd reinforcement)
51,51B 1st column intermediate member (column intermediate member)
52, 52B 2nd column intermediate member (column intermediate member)
53 Third pillar intermediate member (column intermediate member)
511 First pillar intermediate member body (pillar intermediate member body)
512 1st column intermediate member rebar (2nd rebar)

Claims (4)

基礎部と、
前記基礎部の上の柱基部に設けられるプレキャストコンクリート製の柱基部材と、
前記柱基部の上の柱中間部に設けられるプレキャストコンクリート製の柱中間部材と、を有し、
前記基礎部は、基礎部本体と、基礎部本体から上方に突出する第１鉄筋と、を有し、
前記柱基部材は、上下方向に貫通する第１貫通孔を有し、前記第１貫通孔に下側から前記第１鉄筋が挿通された状態で前記基礎部本体の上に設置され、
前記第１鉄筋は、前記柱基部材よりも上方に突出し、前記柱基部材よりも上方で前記柱中間部材と接合されることを特徴とする柱の構造。 With the foundation
Precast concrete column base members provided at the column base above the foundation,
It has a column intermediate member made of precast concrete provided in the column intermediate portion above the column base, and has.
The foundation portion has a foundation portion main body and a first reinforcing bar protruding upward from the foundation portion main body.
The column base member has a first through hole penetrating in the vertical direction, and is installed on the base body in a state where the first reinforcing bar is inserted into the first through hole from below.
The structure of a column, wherein the first reinforcing bar projects upward from the column base member and is joined to the column intermediate member above the column base member. 前記柱基部には、複数の前記柱基部材が上下方向に配列され、
前記第１鉄筋は、複数の前記柱基部材それぞれの前記第１貫通孔を貫通して、最上の前記柱基部材よりも上方に突出し、最上の前記柱基部材よりも上方で前記柱中間部材と接合されることを特徴とする請求項１に記載の柱の構造。 A plurality of the pillar base members are arranged in the vertical direction on the pillar base.
The first reinforcing bar penetrates the first through hole of each of the plurality of the column base members, projects upward from the uppermost column base member, and is above the uppermost column base member. The structure of a column according to claim 1, wherein the column structure is joined with. 前記中間柱部材は、中間柱部材本体と、前記中間柱部材本体に埋設される第２鉄筋と、を有し、
前記中間柱部材本体には、下側に開口し前記第２鉄筋が配置されたスリーブが設けられ、
前記スリーブには、前記第１鉄筋の上部側が下側から挿入され、
前記第１鉄筋と前記第２鉄筋とが、前記スリーブに充填されたグラウト材を介して接合されることを特徴とする請求項１または２に記載の柱の構造。 The intermediate column member has an intermediate column member main body and a second reinforcing bar embedded in the intermediate column member main body.
The intermediate column member main body is provided with a sleeve that opens downward and on which the second reinforcing bar is arranged.
The upper side of the first reinforcing bar is inserted into the sleeve from the lower side.
The structure of a column according to claim 1 or 2, wherein the first reinforcing bar and the second reinforcing bar are joined via a grout material filled in the sleeve. 前記柱中間部の上の柱頭部に設けられるプレキャストコンクリート製の柱頭部材と、
前記柱頭部材に形成された上下方向に貫通する第２貫通孔に挿通される第３鉄筋と、を有し、
前記第３鉄筋は、下部側が前記柱頭部材よりも下方に突出して前記柱中間部材と接合され、上下方向の中間部が前記第２貫通孔に配置されて前記柱頭部材と接合され、上部側が前記柱頭部材よりも上方に突出して前記柱頭部材の上に設けられる部材と接合されることを特徴とする請求項１乃至３の何れか一項に記載の柱の構造。 A precast concrete stigma member provided on the stigma above the middle part of the column,
It has a third reinforcing bar inserted into a second through hole formed in the stigma member and penetrating in the vertical direction.
The lower side of the third reinforcing bar projects downward from the stigma member and is joined to the stigma intermediate member, the vertical intermediate portion is arranged in the second through hole and is joined to the stigma member, and the upper side is the stigma member. The structure of a column according to any one of claims 1 to 3, wherein the column structure projects upward from the stigma member and is joined to a member provided on the stigma member.
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