JP3749935B2

JP3749935B2 - Column and beam construction method and enclosure

Info

Publication number: JP3749935B2
Application number: JP25134196A
Authority: JP
Inventors: 佑造小林
Original assignee: 小林潤
Priority date: 1995-09-26
Filing date: 1996-09-24
Publication date: 2006-03-01
Anticipated expiration: 2016-09-24
Also published as: JPH09151538A

Description

【０００１】
【産業上の利用分野】
この発明は、鉄筋コンクリート構造等の柱に、鉄骨構造の梁を架設結合することを特徴とする柱と梁との構築方法及びこの構築方法に使用する囲い材に関する。
【０００２】
【従来の技術】
従来、一般的には、柱及び梁をいずれも鉄骨構造物とし、あるいは柱及び梁をいずれも鉄筋コンクリート構造物とするような、柱と梁の両方を同一の種類の構造物としていた。
【０００３】
【発明が解決しようとする課題】
前記従来の構造において、梁の部分は自重が曲げに与える影響が大きく、また鉄骨構造で十分な強度を確保できる等の理由により、自重が軽い鉄骨構造とすることが望ましかった。また、柱の部分は圧縮等の強度を考慮すれば鉄筋コンクリート構造物が望ましかった。両構造の長所を取り入れ、鉄骨構造と鉄筋コンクリート構造との両方の構造を混在させる場合には、梁及び柱の材料が本来有している強度を十分に発揮することができず、接合部分で梁と柱との間で力が有効に伝わりにくい問題点があった。また、梁を鉄骨とする構造を採用する場合には、柱と梁との接合部分を柱の外に設ける構造とするしかなく、この場合には、接合部分の本締めまで該接合部分を露出させておく必要があり、接合部分周辺で、床の構築が遅れて床に開口部を生じる等の問題点があった。
【０００４】
【課題を解決するための手段】
然るにこの発明は、柱架設予定の梁を接合固定して接合部分を形成し、該接合部分を柱コンクリート内に埋設したので、前記問題点を解決した。
【０００６】
即ちこの発明は、柱構築予定位置毎に、構築予定の梁の下端位置に合わせた高さを有する梁支持部材を夫々立設し、該梁支持部材に、囲い材用の第一囲い材片を有する梁の所定数を架設載置し、夫々の梁支持部材において、載置された梁の接合端部を相互に接合固定して接合部を形成すると共に、前記梁の接合部と前記梁支持部材とを連結固定し、前記梁の接合部に、次階用の梁支持部材を取付ける為の連結部材を連結固定し、次に前記梁支持部材上に載置された隣り合う梁の第一囲い材片に、構築予定の柱の形状に合わせた形状の囲い材を構成するように、第二囲い材片の両端部を夫々連結固定し、続いて前記柱構築予定位置に所定の柱用構造鉄筋を配筋して、梁接合部分以外に所定の柱構築用の型枠を仮設し、その後、躯体コンクリートを打設して、前記梁の接合部を柱コンクリー内に埋設することを特徴とする柱と梁との構築方法である。
【０００７】
また、前記において、梁は、ウエブの上下にフランジを連設してなる鋼材からなり、該梁の接合端部の上下フランジを先端先細となるように夫々切り欠いて切り欠き縁を形成し、前記梁相互の接合固定は、隣接する梁の前記切り欠き縁を互いに対応して固定すると共に、隣接する梁のウエブに平面Ｌ字状の接続板を固定し、隣接する梁の下フランジの上面、上フランジの下面に夫々横接続板を固定して行う柱と梁との構築方法である。
【０００８】
また、他の発明は、隣接する梁に取り付けて使用する部材であって、該梁を接合する柱の外周に沿った平面形状を有する板状の基体を第１囲い材片、第２囲い材片とから構成し、該第１囲い材片は前記梁に固定することができ、前記第２囲い材片は前記第１囲い材片の端部間を連結できる構成とし、前記基体の内側に、コンクリートに定着する為の定着部材を設置し、前記基体は前記梁の高さと同等の高さを有することを特徴とする囲い材である。
【０００９】
【作用】
梁支持部材に梁を架設したので、梁の接合端部をコンクリート打設後まで、支持できる。また、梁の上に連結部材を設置したので、次階用の梁支持部材を連結できる。また、梁に囲い材を取り付けたので、梁の接合を補助すると共に、囲い材を打ち込み型枠として利用できる。また、囲い材に定着部材を設けたので、囲い材及び囲い材に連結した梁はコンクリート柱内に強固に定着される。
【００１０】
【実施例１】
図１乃至図１０に基づきこの発明に関連する実施例を説明する。
【００１１】
（１）この発明の実施例に使用する梁の構成について説明する。
【００１２】
Ｈ型鋼からなる基体１の接合端部２に位置する上フランジ３及び下フランジ４の両側を先端先細となるように斜（４５度程度）に切り欠いて、上下フランジ３、４のその切り欠いた部分を夫々切欠縁５、６とする。前記基体１の接合端部２の上下フランジ３、４に連結用のボルト孔１１、１１、１２、１２を夫々穿設する。また、前記基体１のウエブ７で、柱形成用型枠を連結する為のボルト孔１３、１３を縦に並列に穿設する。また、前記基体のウエブ７で、先端８側にＬ字接続板を取り付ける為のボルト孔１４、１４を穿設する。
【００１３】
以上のようにして梁１５を構成する（図８（ａ）（ｂ））。前記における梁１５はウエブ７に、肉厚を厚くするように、補強板９、９（図８（ａ）（ｂ）で鎖線図示）を固着することもできる。
【００１４】
（２）次に、この発明の実施例に使用する梁支持部材及び連結部材の構成について説明する。
【００１５】
所定高さ（設置される梁の下端位置に合わせた高さ）のＨ型鋼を縦に配置してなる基部１７の上面に、前記梁１５の接合端部２、２の下面（下フランジ）を支持できる４つの支持部２１、２１を有する平面略十字状の支持板２０、２０を固着する。前記支持板２０の支持部２１には、梁に穿設した前記ボルト孔１２、１２に対応したボルト孔２２、２２が穿設してある。前記基部１７の下端部に、連結部材と連結する為のボルト孔２４を穿設して、梁支持部材２５を構成する（図９）。
【００１６】
また、前記基部１７と同一断面形状の基部２６の下面に、前記支持板と同一の支持板２０を固着する。前記基部２６の上端部に上階の梁支持部材２５と連結する為のボルト孔２７を穿設して連結部材２８を構成する（図９）。
【００１７】
（３）この発明に使用する囲い材について説明する。
【００１８】
柱形成用の型枠位置（柱の外周の形状）に合わせて、平面Ｌ状の角板２９の外側縁２９ａ、２９ａにそれぞれ同一高さＨの平板３０、３０を連設して平面Ｌ字状の基材３１を形成する。前記基材３１の平板３０は角板２９より材厚が厚く形成され、また基材３１の高さＨは、前記１５梁の上下フランジ３、４間に嵌挿できる長さ（梁１５のウエブ７より若干短い長さ）で形成されている。また、前記基材３１の下端部内面に、該下縁に沿って、断面Ｌ字状の下縁押え材３２を連結固着する。
【００１９】
次に、前記基材３１の平板３０、３０の内面３０ａに、水平方向の凸条３５、３５を並列して形成した板からなる定着部材３３を直角に突設する。前記における定着部材３３は直角ではなく、所定角度に傾斜させて平板３０に突設することもできる（図示していない）。また、前記定着部材３３の中間部は前記下縁押え材３２に固着され、下端３４が下縁押え材３２より１／２Ｈ程度突出している。同様に、定着部材３３の上端３４ａは、前記基材３１の上端より上方に１／２Ｈ程度突出している。また、前記基材３１の平板３０、３０の端縁３０ｂ、３０ｂに、前記梁１５の側面（ウエブ７）と連結する為の取付板（鍔）３６、３６を固着する。前記取付板３６は、平板３０のほぼ上下全長に亘る（高さＨ）細長板であり、前記梁１５のボルト孔１３、１３に対応したボルト孔３７、３７を上下に並列して穿設して、囲い材３８を構成する（図１０）。
【００２０】
（４）次に、この発明の構築方法を説明する。
【００２１】
▲１▼ 既設階スラブ３９上の柱設置予定位置４０、４０に梁支持部材２５、２５を立設し（図２）、梁支持部材２５の下端部を下階の連結部材２８の上端部（あるいは基礎）に連結固定する（図１（ａ）、図３（ａ））。この際、梁支持部材２５のボルト孔２４と下階側の連結部材２８のボルト孔２７とを継手板を介してボルトナットで締結固定する。
【００２２】
▲２▼ 次に、梁支持部材２５の支持板２０の各支持部２１、２１に、梁１５、１５の接合端部２を載置する。この際、４本の梁１５はその切欠縁５、５、６、６が互いに対向している（図１（ｂ）、図３（ｂ））。ここで、対向した切欠縁５、６は所定の間隙を設けて、あるいは当接した状態で載置される。
【００２３】
▲３▼ 隣接する梁１５の下フランジ４、８を接合するための平面Ｌ字状の横接続板５０、５０を、梁１５、１５の下フランジ４、４の上面に当接する。前記横接続板５０、５０は、下フランジ４、４のボルト孔１２、１２に対応したボルト孔５１、５１を穿設してある。次に支持板２０のボルト孔２２、２２と、梁１５の下フランジ４のボルト孔１２、１２と、横補強板５０のボルト孔５１とにボルトを挿通してナットを螺合締結し、支持板２０と横接続板５０とで下フランジ４を挟むようにして接合する。
【００２４】
▲４▼ 次に、隣接する梁１５、１５のウエブ７、７に、平面Ｌ字型で、ウエブ７のボルト孔１４に対応したボルト孔４２を穿設したＬ字接続板４１を当接配置し、連通したボルト孔１４、４２にボルトを挿通しナットを締結して、各梁１５、１５のウエブ７とＬ字接続板４１、４１とを一体に連結固定する（図１（ｃ）、図３（ｂ））。
【００２５】
▲５▼ 次に、前記上フランジ３、３上で、前記梁支持部材２５と同軸に、連結部材２８を載置する。前記横接続板５０、５０と同様の形状で、梁１５、１５の上フランジ３、３のボルト孔１１、１１に対応したボルト孔５３、５３を穿設した横接続板５２、５２を、前記上フランジ３、３の下面に当接する。続いて、上フランジ３のボルト孔１１と連結部材２８の支持板２０ボルト孔２２と、横接続板５２のボルト孔５３とにボルトを挿通してナットを螺合締結し、支持板２０と横接続板５２とで上フランジ３を挟むようにして接合し、梁１５、１５と連結部材２８とを一体に連結する。以上のようにして、交わる梁１５、１５は一体に連結される。
【００２６】
▲６▼ 続いて、隣接する梁１５、１５のウエブ７、７間の所定位置に（囲い材３８が構築予定の柱の外周に沿うように）囲い材３８、３８を配置し、ウエブ７のボルト孔１３と、囲い材３８の取付板３６のボルト孔３７とにボルトを挿通し、ナットを螺合締結する（図５（ａ）、図５（ｂ）、図６）。
【００２７】
▲７▼ 次に所定位置に柱主鉄筋４４、４４を配筋し、該柱主鉄筋４４、４４に帯鉄筋４５、４５を配筋し互いに結束する（図１（ｄ）、図６、図７）。この際、前記囲い材３８の定着部材３３の上端３４ａ、下端３４は夫々帯鉄筋４５、４５の内側に位置している（図７）。この定着部材３３の上下端部分により、該部での柱と梁との間の応力の伝達を円滑にすることもできる。
【００２８】
▲８▼ 次に、所定の柱型枠４６及びその他の必要な型枠を仮設してコンクリートを打設する。この際、各梁１５には囲い材３８を設けたので、該部に別途型枠を構築する手間を省くことができる。この際、囲い材３８の下縁押え材３２により、囲い材３８の下縁と柱型枠４６の上縁との当接部分でのコンクリートの漏れを防止できる。
【００２９】
▲９▼ コンクリートの固化後、柱型枠４６その他の仮設した型枠を取り外せば、各梁１５の接合部は柱内に埋設され、鉄筋コンクリート製の柱と鉄骨製の梁１５とが連結して構築される（図示していない）。前記のように梁１５、１５を接合した場合には、強固に接合されるので、柱の断面積を必要以上に大きく取る必要がない。
【００３０】
前記における各部材の連結に使用したボルトナットは、ハイテンションボルトとすることが望ましい。
【００３１】
（５）他の実施例
前記実施例において、梁支持部材２５と梁１５、梁１５と連結部材２８の各連結に、ボルトナットに代え、またはボルトナットに加えて溶接をすることもできる。
【００３２】
また、前記実施例において、梁１５が４本連結される柱で説明したが、２本、３本の場合でも、同様に可能である。この場合には、Ｌ字接続板４１に加えて平板状の接続板、平面Ｌ字状の囲い材３８に加えて、柱の外周形状に対応させて平面コ字状の囲い材を使用し、またＬ字状の横接続板５０、５２に加えて短冊形状の横接続板を、夫々使用する（図示していない）。
【００３３】
また、前記実施例に使用する梁１５はＨ型鋼としたが、梁に使用できる所定の断面を有する鋼材であれば、その断面形状は問わない。
【００３４】
また、前記実施例における梁支持部材２５及び連結部材２８の支持板２０を十字型としたが、梁１５を支持できる支持部２１を有すれば、四角形、八角形、円形等他の形状でも可能である。また、前記実施例における梁支持部材２５及び連結部材２８の基部１７、２６は、梁１５を支持してコンクリートの打設後まで梁１５の接合部を所定位置に保つことができれば、他の構造でも可能であり、他の型鋼等を種々選択して使用できる（図示していない）。
【００３５】
また、前記実施例における囲い材３８の定着部材は凸条３５を形成したが、コンクリートとの定着力を増すことができれば他の構造とすることもでき、例えば、凹条を設け、突起を突設し、鉄筋を溶接し、あるいは表面を粗く仕上げる等でも可能である。また、定着部材３３の先端に、定着部材３３と略直角に定着補強板５４、５４を固着することもできる（図１０鎖線図示５４、５４）、また、定着部材３３の上下端３４、３４ａは１／２Ｈ程度突出させたが、補強効果と扱い易さを考慮して１／４Ｈ乃至１Ｈ程度とすることもでき、更に梁１５、１５の上下で所定強度を発揮できるように柱主鉄筋４４を増やせば、上下端３４、３４ａは基材３１内に納めることもできる（図示していない）。また、定着部材３３の形状、設置数も所望の定着力により種々選択できる。
【００３６】
【実施例２】
図１１乃至図１５に基づきこの発明の他の実施例を説明する。この実施例は、囲い材の一部を予め梁に固定した実施例である。
【００３７】
（１）この発明の実施例に使用する梁の構成について説明する。
【００３８】
実施例１と同様にＨ型鋼からなる基体１の接合端部２の上下フランジ３、４を先端先細となるように斜に切り欠いて、該縁を切欠縁５、６とする。接合端部２の上下フランジ３、４に連結用のボルト孔１１、１１、１２、１２を夫々穿設する。また、基体１のウエブ７の先端８側に連結用のボルト孔１４、１４を穿設する。
【００３９】
また、柱形成用の型枠位置に対応して、基体１のウエブ７の両側に囲い材片５８、５８を固着する。前記囲い材片５８の先端部に、他の囲い材片６２連結用のボルト孔６３、６３を上下方向に並列して穿設してある。囲い材片５８は上下端６０、６０及び先端（横方向）６１はいずれも上下フランジ３、４より突出して形成されており、上下フランジ３、４及びウエブ７の両方に固着されている。以上のようにして、梁５６を構成する（図１１）。
【００４０】
前記実施例における梁５６の囲い材片５８以外の他の構成は実施例１と同様である。
【００４１】
（２）次にこの発明の実施例に使用する梁支持部材及び連結部材の構成について説明する。
【００４２】
実施例１では基部１７、２６にＨ型鋼を使用しているが、この実施例では、Ｌ型鋼を２つ使用して断面十字状に形成されている。他の構成は実施例１と同様として、梁支持部材２５、連結部材２８を構成する（図１２、図９同様）。
【００４３】
前記実施例における梁支持部材２５及び連結部材２８の他の構成は実施例１と同様である。
【００４４】
（３）この発明に使用する囲い材について説明する。
【００４５】
この実施例の囲い材６６は、前記のように梁５６に固定した囲い材片５８と、隣接する梁５６の囲い材片５８、５８の端部間を連結する囲い材片６２、６２とから構成される。囲い材片５８と囲い材片６２とにより柱型枠の一部を形成する。
【００４６】
前記囲い材片６２は、平面略Ｌ字状で、両端部に、前記囲い材片５８のボルト孔５９、５９と対応するボルト孔６３、６３が、縦方向に並列して穿設されている。また、囲い材片６２の角部６４の内側６４ａに、補強及びコンクリートとの定着力強化の為に、必要本数の補強杆６５の両端部を固着する（図１３）。前記補強杆６５は、通常、囲い材片６２の上部及び下部に設けるが、設置位置及び本数は必要に応じて適宜選択して使用する。
【００４７】
前記実施例において、囲い材片５８、６４には実施例１の下縁押え材３２、３２（図１０）を使用することもできる（図示していない）。また、囲い材片５８、６４に定着部材３３、定着補強板５４等を、固着することもできる（図示していない）。その他、囲い材片５８、６２の内面に凹凸を形成する場合、内面を粗く形成する場合など囲い材の他の構成は実施例１と同様である。
【００４８】
（４）次に、この発明の構築方法を説明する。
【００４９】
▲１▼ 実施例１と同様に、既設階スラブ３９上の柱設置４０、４０も梁支持部材２５、２５を立設し（図２同様）、梁支持部材２５の下端部を下階の連結部材２８の上端部（あるいは基礎）に、継手板を介してボルトナット（図中省略してある）で連結固定する（図１（ａ）同様、図１２）。
【００５０】
▲２▼ 次に、梁支持部材２５の支持板２０の各支持部に梁５８、５８の接合端部２を載置し、切欠縁５、６を互いに、所定間隙を開けて対向させる（図１（ｂ）同様）。実施例１と同様に、切欠縁５、６は当接して対向させてもよい。
【００５１】
▲３▼ 次に、実施例１と同様に、隣接する梁５６、５６の下フランジ４、４を、支持板２０と横接続板５０とで挟んで、ボルトナット（図中省略してある）で接合する。
【００５２】
▲４▼ 次に、実施例１と同様に、隣接する梁５６、５６のウエブ７をＬ字接続板４１、４１を介装して、ボルトナットで接合する（図１（ｃ）同様）。
【００５３】
▲５▼ 次に、実施例１と同様に、上フランジ３、３上に、梁支持部材２５と同軸に、連結部材２８を載置し、梁５６、５６の上フランジ３、３を連結部材２８の支持板２０と横接続板５２とで挟み、ボルトナット（図中省略してある）で接合する。
【００５４】
▲６▼ 続いて、隣接する梁５６の囲い材片５８、５８は所定間隙６８を開けて配置されており、該間隙６８を囲い材片６２で塞ぐように、囲い材片５８に囲い材片６２を重ね（図１３）、ボルト孔５９、６３間に、ボルト６９を挿通してナット７０で螺合締結して、囲い材片５８、６２を接合する（図１４、１５）。囲い材片５８、６２は、構築予定の柱型枠の一部を成す。
【００５５】
▲７▼ 次に、実施例１と同様に、所定位置に柱主鉄筋４４、４４を帯鉄筋４５、４５を配筋して互いに結束連結する（図１（ｄ）同様）。
【００５６】
▲８▼ 次に、実施例１と同様に、柱型枠４６及びその他必要な型枠を仮設してコンクリートを打設する。
【００５７】
▲９▼ コンクリートの固化後、実施例１と同様に、柱型枠４６その他不要な型枠を取り外せば、、各梁の接合部は柱内に埋設され、鉄筋コンクリート製の柱に鉄骨梁が連結した構造が構築される。
【００５８】
（４）他の実施例
前記実施例において、囲い材片６２を取付けた後に柱主鉄筋等を配筋したが、柱主鉄筋等を配筋した後に、間隙６８を塞ぐように、囲い材片６２を取付けることもできる。
【００５９】
また、前記実施例において、囲い材片５８、６２を連結したボルトナット６９、７０、その他のボルトナット、補強杆６５などにより柱コンクリートとの定着力を強化したが、これに代えてあるいはこれに追加して、他の突起物（定着部材３３等）を柱コンクリート内に設けて定着力を高めることもできる（図示していない）。
【００６０】
また、前記実施例において、４本の梁５６が交わる構造の構築について説明したが、２本、３本など他の本数梁が交わる構造の構築は、前記実施例１と同様である。その他、他の実施例は実施例１と同様である。
【００６１】
【発明の効果】
この発明は、架設予定の梁を相互に接合固定して、梁の接合部を柱コンクリート内に埋設したので、鉄骨梁と鉄筋コンクリート柱とが強固に結合した構造を構築できる。
【００６２】
また、梁支持部材に梁を架設連結し、連結部材を梁に連結したので、鉄骨製の梁をコンクリート打設後まで所定位置に支持できると共に、上階と下階の梁支持部材を互いに連結できるので、鉄筋コンクリート柱と鉄骨梁とが連結した構造物を容易に構築できる効果がある。また、囲い材を設けたので、梁連結部分に位置する柱主鉄筋に帯鉄筋を不要にできると共に、梁連結部分での柱型枠の構築を不要にできるので、作業の効率化をはかることができる。
【００６３】
また、この発明の方法によれば、１階毎に構築するので、先行する高所の足場等仮設作業が不要であるので作業上安全であり、また各階毎に同一作業の繰り返しにより作業ができるので、建造物全体を効率良く構築できる効果がある。
【図面の簡単な説明】
【図１】（ａ）乃至（ｄ）は、この発明の実施例の構築方法を説明する一部を破切した側面図である。
【図２】この発明の構築予定位置に梁支持部材を載置した状態を示す平面図である。
【図３】この発明の構築途中の平面図で、図１（ａ）の状態を表す。
【図４】同じく平面図で、図１（ｂ）の状態を表す。
【図５】この発明の構築途中の平面図で、（ａ）は囲い材を取り付け前、（ｂ）は囲い材を取り付け後を夫々表す。
【図６】この発明の構築途中で、図１（ｄ）のＡ−Ａ線における拡大断面図である。
【図７】図６のＢ−Ｂ線における断面図である。
【図８】この発明の実施例に使用する梁で、（ａ）は正面図、（ｂ）は（ａ）のＣ−Ｃ線における断面図である。
【図９】この発明の実施例に使用する梁支持部材及び連結部材の斜視図である。
【図１０】この発明の実施例に使用する囲い材の斜視図である。
【図１１】この発明の実施例２に使用する梁で、（ａ）は正面図、（ｂ）は右側面図、（ｃ）は平面図である。
【図１２】この発明の実施例２で、構築途中の平面図で、図１（ａ）に相当する状態を表す。
【図１３】同じく構築途中の横断面図で、第二囲い材片を取付ける途中を表す。
【図１４】同じく構築途中の横断面図で、図１（ｃ）に相当する状態を表す。
【図１５】図１４のＤ−Ｄ線における断面図である。
【符号の説明】
２接合端部（梁）
３上フランジ
４下フランジ
５切欠縁（上フランジ）
６切欠縁（下フランジ）
７ウエブ
１５梁
１７基部（梁支持部材）
２０支持板
２１支持部
２５梁支持部材
２６基部（連結部材）
２８連結部材
２９角板
３０平板
３１基材
３３定着部材
３５凸条
３６取付板
３８囲い材
３９既設階スラブ
４０柱設置予定位置
４４柱主鉄筋
４５帯鉄筋
５６梁
５８囲い材片（第一囲い材片）
６２囲い材片（第二囲い材片）
６６囲い材[0001]
[Industrial application fields]
The present invention relates to a method for constructing a column and a beam, characterized in that a steel-structured beam is erected and coupled to a column such as a reinforced concrete structure, and an enclosure used for the construction method.
[0002]
[Prior art]
Conventionally, in general, both the column and the beam are made of a steel structure, or both the column and the beam are made of a reinforced concrete structure.
[0003]
[Problems to be solved by the invention]
In the conventional structure, it has been desired that the beam portion has a light steel weight structure because the weight of the beam has a great influence on bending and a sufficient strength can be secured by the steel structure. In addition, a reinforced concrete structure was desired for the column part considering the strength such as compression. Incorporating the advantages of both structures and mixing both steel and reinforced concrete structures, the strength inherent in the material of the beams and columns cannot be fully exerted, and the beams at the joints There was a problem that the force was difficult to be transmitted effectively between the pillar and the pillar. In addition, when adopting a structure in which the beam is a steel frame, there is no choice but to have a structure in which the joint part between the column and the beam is provided outside the pillar. In this case, the joint part is exposed until the final fastening of the joint part There was a problem that the floor construction was delayed around the joint and an opening was created in the floor.
[0004]
[Means for Solving the Problems]
However, the present invention solves the above-mentioned problems because the beam to be erected in the column is bonded and fixed to form a bonded portion and the bonded portion is buried in the column concrete.
[0006]
That is, according to the present invention , a beam support member having a height corresponding to a lower end position of a beam to be built is erected at each column construction planned position, and a first enclosure piece for the enclosure is provided on the beam support member. A predetermined number of beams having a plurality of beams are installed and mounted, and in each beam support member, joint ends of the mounted beams are joined and fixed to each other to form a joint portion, and the joint portion of the beam and the beam The connecting member is connected and fixed, and the connecting member for attaching the beam supporting member for the next floor is connected and fixed to the joint portion of the beam, and then the second of the adjacent beams placed on the beam supporting member is fixed. Both ends of the second enclosure piece are connected and fixed to one enclosure piece so as to form an enclosure having a shape that matches the shape of the pillar to be constructed, and then a predetermined pillar is placed at the pillar construction position. Reinforcing the structural rebar for the building, and temporarily laying the formwork for building the prescribed pillars in addition to the beam joints. And pouring a method of constructing the columns and beams, characterized by embedding the junction of the beam in the column concrete.
[0007]
Further, in the above, the beam is made of a steel material in which a flange is continuously provided on the upper and lower sides of the web, and the upper and lower flanges at the joining end portion of the beam are respectively cut out to form a notched edge, The beams are joined and fixed by fixing the notched edges of the adjacent beams corresponding to each other, fixing a plane L-shaped connecting plate to the web of the adjacent beams, and the upper surface of the lower flange of the adjacent beams. This is a method for constructing a column and a beam by fixing the lateral connection plate to the lower surface of the upper flange.
[0008]
Further, another invention is a member that is used by being attached to an adjacent beam, and a plate-like substrate having a planar shape along the outer periphery of a column that joins the beam is used as a first enclosure member and a second enclosure member. And the first enclosing member piece can be fixed to the beam, and the second enclosing member piece can be connected between the ends of the first enclosing member piece. A fixing member for fixing to concrete is installed, and the base body has a height equivalent to the height of the beam.
[0009]
[Action]
Since the beam is installed on the beam support member, the joint end of the beam can be supported until after the concrete is placed. Moreover, since the connecting member is installed on the beam, the beam support member for the next floor can be connected. In addition, since the enclosure material is attached to the beam, it is possible to assist the joining of the beam and to use the enclosure material as a driving form. Further, since the fixing member is provided in the enclosure material, the enclosure material and the beam connected to the enclosure material are firmly fixed in the concrete column.
[0010]
[Example 1]
An embodiment related to the present invention will be described with reference to FIGS.
[0011]
(1) The structure of the beam used for the Example of this invention is demonstrated.
[0012]
Both sides of the upper flange 3 and the lower flange 4 located at the joint end 2 of the base body 1 made of H-shaped steel are cut obliquely (about 45 degrees) so that the tips are tapered, and the notches of the upper and lower flanges 3 and 4 are cut. The cut portions are designated as notches 5 and 6, respectively. Connecting bolt holes 11, 11, 12, 12 are formed in the upper and lower flanges 3, 4 of the joining end 2 of the base 1. Also, bolt holes 13 and 13 for connecting the column forming form are formed in parallel in the vertical direction on the web 7 of the base 1. Further, bolt holes 14 and 14 for attaching an L-shaped connecting plate are formed on the tip 8 side of the base web 7.
[0013]
The beam 15 is configured as described above (FIGS. 8A and 8B). Reinforcing plates 9, 9 (shown by chain lines in FIGS. 8A and 8B) can be fixed to the web 7 so that the beam 15 is thickened.
[0014]
(2) Next, the structure of the beam support member and connection member used in the embodiment of the present invention will be described.
[0015]
The lower surface (lower flange) of the joint ends 2 and 2 of the beam 15 is formed on the upper surface of the base portion 17 formed by vertically arranging H-shaped steel having a predetermined height (the height corresponding to the lower end position of the beam to be installed). The planar substantially cross-shaped support plates 20 and 20 having four support portions 21 and 21 that can be supported are fixed. Bolt holes 22 and 22 corresponding to the bolt holes 12 and 12 formed in the beam are formed in the support portion 21 of the support plate 20. A beam support member 25 is formed by drilling a bolt hole 24 for connecting to a connecting member at the lower end of the base portion 17 (FIG. 9).
[0016]
Further, the same support plate 20 as the support plate is fixed to the lower surface of the base portion 26 having the same cross-sectional shape as the base portion 17. Bolt holes 27 are formed in the upper end portion of the base portion 26 so as to be connected to the beam support member 25 on the upper floor to constitute a connecting member 28 (FIG. 9).
[0017]
(3) The enclosure material used in the present invention will be described.
[0018]
Flat plates 30 and 30 having the same height H are connected to the outer edges 29a and 29a of the flat L-shaped square plate 29 in accordance with the position of the column forming form (the shape of the outer periphery of the column), respectively. A base material 31 is formed. The flat plate 30 of the base material 31 is formed thicker than the square plate 29, and the height H of the base material 31 is a length that can be inserted between the upper and lower flanges 3 and 4 of the 15 beams (the web of the beam 15). 7) (slightly shorter than 7). Further, a lower edge pressing member 32 having an L-shaped cross section is connected and fixed to the inner surface of the lower end portion of the base material 31 along the lower edge.
[0019]
Next, a fixing member 33 made of a plate formed by juxtaposing horizontal ridges 35 and 35 is provided at right angles on the inner surfaces 30a of the flat plates 30 and 30 of the substrate 31. The fixing member 33 is not perpendicular but can be inclined to a predetermined angle so as to protrude from the flat plate 30 (not shown). An intermediate portion of the fixing member 33 is fixed to the lower edge pressing member 32, and a lower end 34 protrudes from the lower edge pressing member 32 by about 1 / 2H. Similarly, the upper end 34 a of the fixing member 33 protrudes about ½H above the upper end of the base material 31. Further, mounting plates (hooks) 36 and 36 for connecting to the side surfaces (web 7) of the beam 15 are fixed to the edges 30b and 30b of the flat plates 30 and 30 of the base material 31, respectively. The mounting plate 36 is a long and narrow plate (height H) that extends over the entire length of the flat plate 30, and bolt holes 37 and 37 corresponding to the bolt holes 13 and 13 of the beam 15 are formed in parallel in the vertical direction. Thus, the enclosure member 38 is formed (FIG. 10).
[0020]
(4) Next, the construction method of the present invention will be described.
[0021]
(1) The beam support members 25 and 25 are erected at the column installation planned positions 40 and 40 on the existing floor slab 39 (FIG. 2), and the lower end portion of the beam support member 25 is connected to the upper end portion of the connecting member 28 on the lower floor ( Alternatively, it is connected and fixed to the foundation (FIGS. 1A and 3A). At this time, the bolt hole 24 of the beam support member 25 and the bolt hole 27 of the connecting member 28 on the lower floor side are fastened and fixed with a bolt nut through a joint plate.
[0022]
(2) Next, the joint end portions 2 of the beams 15 and 15 are placed on the support portions 21 and 21 of the support plate 20 of the beam support member 25. At this time, the notches 5, 5, 6, and 6 of the four beams 15 face each other (FIGS. 1B and 3B). Here, the notched edges 5 and 6 facing each other are placed with a predetermined gap or in contact with each other.
[0023]
(3) Flat L-shaped lateral connection plates 50 and 50 for joining the lower flanges 4 and 8 of adjacent beams 15 are brought into contact with the upper surfaces of the lower flanges 4 and 4 of the beams 15 and 15. The lateral connection plates 50, 50 are provided with bolt holes 51, 51 corresponding to the bolt holes 12, 12 of the lower flanges 4, 4. Next, the bolts are inserted into the bolt holes 22 and 22 of the support plate 20, the bolt holes 12 and 12 of the lower flange 4 of the beam 15, and the bolt holes 51 of the lateral reinforcing plate 50, and nuts are screwed and fastened. The plate 20 and the lateral connection plate 50 are joined so as to sandwich the lower flange 4.
[0024]
(4) Next, on the webs 7 and 7 of the adjacent beams 15 and 15, an L-shaped connection plate 41 having a flat L shape and having a bolt hole 42 corresponding to the bolt hole 14 of the web 7 is placed in contact with the web 7. Then, bolts are inserted into the connected bolt holes 14 and 42, and nuts are fastened, so that the webs 7 of the beams 15 and 15 and the L-shaped connection plates 41 and 41 are integrally connected and fixed (FIG. 1 (c), FIG. 3 (b)).
[0025]
(5) Next, the connecting member 28 is placed on the upper flanges 3 and 3 coaxially with the beam support member 25. The lateral connection plates 52, 52 having the same shape as the lateral connection plates 50, 50 and having the bolt holes 53, 53 corresponding to the bolt holes 11, 11 of the upper flanges 3, 3 of the beams 15, 15; It contacts the lower surfaces of the upper flanges 3 and 3. Subsequently, a bolt is inserted into the bolt hole 11 of the upper flange 3, the support plate 20 bolt hole 22 of the connecting member 28, and the bolt hole 53 of the lateral connection plate 52, and a nut is screwed and fastened. The connecting plate 52 is joined so as to sandwich the upper flange 3, and the beams 15 and 15 and the connecting member 28 are integrally connected. As described above, the intersecting beams 15 and 15 are integrally connected.
[0026]
(6) Subsequently, the enclosure members 38 and 38 are arranged at predetermined positions between the webs 7 and 7 of the adjacent beams 15 and 15 (so that the enclosure member 38 extends along the outer periphery of the column to be constructed). A bolt is inserted through the bolt hole 13 and the bolt hole 37 of the mounting plate 36 of the enclosure member 38, and the nut is screwed and fastened (FIGS. 5A, 5B, and 6).
[0027]
(7) Next, column main reinforcing bars 44, 44 are arranged at predetermined positions, and band reinforcing bars 45, 45 are arranged on the column main reinforcing bars 44, 44 and are bound to each other (FIG. 1 (d), FIG. 6, FIG. 7). At this time, the upper end 34a and the lower end 34 of the fixing member 33 of the enclosure member 38 are positioned inside the belt reinforcing bars 45 and 45, respectively (FIG. 7). By the upper and lower end portions of the fixing member 33, it is possible to smoothly transmit stress between the column and the beam at the portion.
[0028]
(8) Next, a predetermined column mold 46 and other necessary molds are temporarily placed and concrete is placed. At this time, since the enclosure member 38 is provided on each beam 15, it is possible to save time and labor for constructing a separate formwork in the portion. At this time, the lower edge pressing member 32 of the enclosure member 38 can prevent the concrete from leaking at the contact portion between the lower edge of the enclosure member 38 and the upper edge of the column mold frame 46.
[0029]
(9) After the concrete is solidified, if the column formwork 46 or other temporary formwork is removed, the joint of each beam 15 is buried in the pillar, and the reinforced concrete column and the steel beam 15 are connected. Constructed (not shown). When the beams 15 and 15 are joined as described above, they are firmly joined, so that it is not necessary to increase the cross-sectional area of the columns more than necessary.
[0030]
The bolts and nuts used for connecting the above members are preferably high tension bolts.
[0031]
(5) Other Embodiments In the above embodiments, the beam support member 25 and the beam 15, and the beam 15 and the connecting member 28 can be welded in place of the bolt nut or in addition to the bolt nut.
[0032]
Moreover, in the said Example, although the beam 15 connected to the four pillars demonstrated, it is possible similarly in the case of two and three. In this case, in addition to the L-shaped connection plate 41, in addition to the flat connection plate and the planar L-shaped enclosure 38, a planar U-shaped enclosure is used corresponding to the outer peripheral shape of the column, In addition to the L-shaped lateral connection plates 50 and 52, strip-shaped lateral connection plates are used (not shown).
[0033]
Moreover, although the beam 15 used for the said Example was H-shaped steel, if the steel material which has the predetermined | prescribed cross section which can be used for a beam, the cross-sectional shape will not ask | require.
[0034]
In addition, although the beam support member 25 and the support plate 20 of the connecting member 28 in the above embodiment are cross-shaped, other shapes such as a quadrangle, an octagon, and a circle are possible if the support portion 21 that can support the beam 15 is provided. It is. In addition, the base portions 17 and 26 of the beam support member 25 and the connecting member 28 in the above-described embodiment may have other structures as long as they can support the beam 15 and keep the joint portion of the beam 15 in a predetermined position until after the concrete is placed. However, it is also possible to use various types of steel shapes and the like (not shown).
[0035]
Further, although the fixing member of the enclosure member 38 in the above embodiment forms the ridge 35, other structures can be used as long as the fixing force with the concrete can be increased. For example, a recess is provided and the protrusion protrudes. It is possible to install, weld the reinforcing bars, or finish the surface rough. In addition, fixing reinforcing plates 54 and 54 can be fixed to the front end of the fixing member 33 substantially at right angles to the fixing member 33 (shown by chain lines 54 and 54 in FIG. 10), and upper and lower ends 34 and 34a of the fixing member 33 are Although it protrudes about 1 / 2H, it can be set to about 1 / 4H to 1H in consideration of the reinforcing effect and ease of handling, and the column main reinforcing bars 44 so that predetermined strength can be exhibited above and below the beams 15 and 15. Can be accommodated in the base material 31 (not shown). Further, the shape and the number of the fixing members 33 can be variously selected depending on a desired fixing force.
[0036]
[Example 2]
Another embodiment of the present invention will be described with reference to FIGS. In this embodiment, a part of the enclosure material is fixed to the beam in advance.
[0037]
(1) The structure of the beam used in the embodiment of the present invention will be described.
[0038]
Similarly to the first embodiment, the upper and lower flanges 3 and 4 of the joint end 2 of the base 1 made of H-shaped steel are cut obliquely so as to be tapered at the ends, and the edges are set as cut edges 5 and 6. Connecting bolt holes 11, 11, 12, 12 are formed in the upper and lower flanges 3, 4 of the joint end 2. Further, bolt holes 14 and 14 for connection are formed on the tip 8 side of the web 7 of the base 1.
[0039]
Further, enclosing material pieces 58 and 58 are fixed to both sides of the web 7 of the base 1 in correspondence with the column forming positions for forming the columns. Bolt holes 63 and 63 for connecting other surrounding material pieces 62 are formed in parallel at the front end of the surrounding material piece 58 in the vertical direction. The upper and lower ends 60 and 60 and the tip (lateral direction) 61 of the enveloping piece 58 are formed so as to protrude from the upper and lower flanges 3 and 4, and are fixed to both the upper and lower flanges 3 and 4 and the web 7. The beam 56 is configured as described above (FIG. 11).
[0040]
The configuration other than the enclosure piece 58 of the beam 56 in the above embodiment is the same as that in the first embodiment.
[0041]
(2) Next, the structure of the beam support member and the connecting member used in the embodiment of the present invention will be described.
[0042]
In the first embodiment, H-shaped steel is used for the base portions 17 and 26, but in this embodiment, two L-shaped steels are used to form a cross-shaped cross section. Other configurations are the same as in the first embodiment, and the beam support member 25 and the connecting member 28 are configured (similar to FIGS. 12 and 9).
[0043]
Other configurations of the beam support member 25 and the connecting member 28 in the embodiment are the same as those in the first embodiment.
[0044]
(3) The enclosure material used in the present invention will be described.
[0045]
The enclosure member 66 of this embodiment includes an enclosure piece 58 fixed to the beam 56 as described above, and enclosure pieces 62 and 62 that connect between the ends of the enclosure pieces 58 and 58 of the adjacent beam 56. Composed. A part of the column mold is formed by the enclosure piece 58 and the enclosure piece 62.
[0046]
The enveloping piece 62 is substantially L-shaped in a plane, and bolt holes 63 and 63 corresponding to the bolt holes 59 and 59 of the enclosing piece 58 are drilled in parallel in the vertical direction at both ends. . Further, both ends of the necessary number of reinforcing rods 65 are fixed to the inner side 64a of the corner 64 of the enclosure piece 62 in order to reinforce and strengthen the fixing force with the concrete (FIG. 13). The reinforcing rods 65 are usually provided at the upper and lower portions of the enclosure piece 62, but the installation position and the number of the reinforcing rods are appropriately selected and used as necessary.
[0047]
In the above-described embodiment, the lower edge pressing members 32 and 32 (FIG. 10) of the first embodiment can be used for the surrounding member pieces 58 and 64 (not shown). Further, the fixing member 33, the fixing reinforcing plate 54 and the like can be fixed to the surrounding material pieces 58 and 64 (not shown). In addition, the other configurations of the enveloping material are the same as those of the first embodiment, such as when the concave and convex portions are formed on the inner surfaces of the enveloping material pieces 58 and 62 and the inner surface is formed rough.
[0048]
(4) Next, the construction method of the present invention will be described.
[0049]
(1) As in the first embodiment, the column installations 40, 40 on the existing floor slab 39 are also provided with beam support members 25, 25 (similar to FIG. 2), and the lower end of the beam support member 25 is connected to the lower floor. It connects and fixes to the upper end part (or foundation) of member 28 with a bolt nut (it is omitted in the figure) via a joint board (similar to Drawing 1 (a), Drawing 12).
[0050]
(2) Next, the joint ends 2 of the beams 58 and 58 are placed on the respective support portions of the support plate 20 of the beam support member 25, and the notched edges 5 and 6 are opposed to each other with a predetermined gap (see FIG. 1 (b)). As in the first embodiment, the notched edges 5 and 6 may be in contact with each other.
[0051]
(3) Next, as in the first embodiment, the lower flanges 4, 4 of the adjacent beams 56, 56 are sandwiched between the support plate 20 and the lateral connection plate 50, and bolts and nuts (not shown in the figure). Join with.
[0052]
(4) Next, as in the first embodiment, the webs 7 of the adjacent beams 56 and 56 are joined with bolts and nuts with the L-shaped connection plates 41 and 41 interposed therebetween (similar to FIG. 1C).
[0053]
(5) Next, as in the first embodiment, the connecting member 28 is placed on the upper flanges 3 and 3 coaxially with the beam support member 25, and the upper flanges 3 and 3 of the beams 56 and 56 are connected to the connecting member. 28 between the support plate 20 and the lateral connection plate 52 and joined with bolts and nuts (not shown).
[0054]
(6) Subsequently, the surrounding material pieces 58 and 58 of the adjacent beam 56 are arranged with a predetermined gap 68 therebetween, and the enclosing material piece 58 is enclosed by the enclosing material piece 58 so as to close the gap 68 with the enclosing material piece 62. 62 are overlapped (FIG. 13), a bolt 69 is inserted between the bolt holes 59 and 63, and is screwed and fastened with a nut 70 to join the surrounding material pieces 58 and 62 (FIGS. 14 and 15). Enclosure pieces 58 and 62 form a part of a column form to be built.
[0055]
(7) Next, in the same manner as in the first embodiment, the column main reinforcing bars 44, 44 are arranged at predetermined positions, and the bar reinforcing bars 45, 45 are arranged and bound together (similar to FIG. 1 (d)).
[0056]
(8) Next, in the same manner as in the first embodiment, the column mold 46 and other necessary molds are temporarily set and concrete is placed.
[0057]
(9) After solidification of the concrete, if the column formwork 46 and other unnecessary formwork are removed in the same manner as in Example 1, the joint of each beam will be buried in the column, and the steel beam will be connected to the column made of reinforced concrete. The structure is constructed.
[0058]
(4) Other Embodiments In the above embodiment, the column main reinforcing bars and the like are arranged after the enclosure piece 62 is attached. However, after the column main reinforcing bars and the like are arranged, the enclosure pieces are closed so as to close the gap 68. 62 can also be attached.
[0059]
Moreover, in the said Example, although the bolt nuts 69 and 70 which connected the enclosure material pieces 58 and 62, other bolt nuts, the reinforcement rod 65, etc. strengthened the fixing power with column concrete, it replaces with this or this. In addition, other protrusions (such as the fixing member 33) can be provided in the column concrete to increase the fixing force (not shown).
[0060]
In the above-described embodiment, the construction of the structure where the four beams 56 intersect is described. However, the construction of the structure where the other number of beams such as two or three beams intersect is the same as that of the first embodiment. Other embodiments are the same as those in the first embodiment.
[0061]
【The invention's effect】
According to the present invention, the beams to be installed are joined and fixed to each other, and the joint portion of the beams is embedded in the column concrete, so that a structure in which the steel beam and the reinforced concrete column are firmly coupled can be constructed.
[0062]
In addition, since the beam is installed and connected to the beam support member, and the connection member is connected to the beam, the steel beam can be supported at a predetermined position until after the concrete is placed, and the beam support members on the upper floor and the lower floor are connected to each other. Therefore, it is possible to easily construct a structure in which a reinforced concrete column and a steel beam are connected. In addition, since the enclosure material is provided, it is possible to eliminate the need for band reinforcement in the column main rebar located at the beam connection part, and to eliminate the need to construct a column formwork at the beam connection part, thus improving work efficiency. Can do.
[0063]
In addition, according to the method of the present invention, since construction is performed for each floor, temporary work such as scaffolding in the preceding high place is unnecessary, so that work is safe and work can be performed by repeating the same work for each floor. Therefore, there exists an effect which can construct the whole building efficiently.
[Brief description of the drawings]
FIGS. 1A to 1D are side views, partially broken away, illustrating a construction method according to an embodiment of the present invention.
FIG. 2 is a plan view showing a state in which a beam support member is placed at a planned construction position according to the present invention.
FIG. 3 is a plan view in the middle of construction of the present invention and represents the state of FIG.
FIG. 4 is also a plan view showing the state of FIG. 1 (b).
FIGS. 5A and 5B are plan views in the middle of construction of the present invention, in which FIG. 5A shows before the enclosure is attached, and FIG. 5B shows after the enclosure is attached.
6 is an enlarged cross-sectional view taken along line AA in FIG. 1 (d) during the construction of the present invention.
7 is a cross-sectional view taken along line BB in FIG.
8A is a front view of a beam used in an embodiment of the present invention, and FIG. 8B is a cross-sectional view taken along the line CC of FIG. 8A.
FIG. 9 is a perspective view of a beam support member and a connecting member used in the embodiment of the present invention.
FIG. 10 is a perspective view of an enclosure member used in the embodiment of the present invention.
11A and 11B show a beam used in Embodiment 2 of the present invention, in which FIG. 11A is a front view, FIG. 11B is a right side view, and FIG. 11C is a plan view.
FIG. 12 is a plan view in the middle of construction in Embodiment 2 of the present invention, and shows a state corresponding to FIG.
FIG. 13 is a cross-sectional view in the middle of construction, showing the middle of mounting the second enclosure piece.
FIG. 14 is a cross-sectional view in the middle of construction, showing a state corresponding to FIG.
15 is a cross-sectional view taken along the line DD of FIG.
[Explanation of symbols]
2 Joint end (beam)
3 Upper flange 4 Lower flange 5 Notched edge (upper flange)
6 Notch edge (lower flange)
7 Web 15 Beam 17 Base (beam support member)
20 support plate 21 support part 25 beam support member 26 base part (connection member)
28 connecting member 29 square plate 30 flat plate 31 base material 33 fixing member 35 ridge 36 mounting plate 38 enclosure material 39 existing floor slab 40 pillar installation planned position 44 pillar main reinforcing bar 45 strip reinforcement 56 beam 58 enclosure material piece (first enclosure material) Piece)
62 Enclosure piece (second enclosure piece)
66 Enclosure

Claims

A beam support member having a height corresponding to the lower end position of the beam to be built is erected at each column construction planned position, and a predetermined beam of a beam having a first enclosure piece for the enclosure is provided on the beam support member. In each beam support member, the joint ends of the placed beams are joined and fixed to each other to form a joint portion, and the joint portion of the beam and the beam support member are connected to each other. Fix and fix the connecting member for attaching the beam support member for the next floor to the joint part of the beam, and then to the first enclosure piece of the adjacent beam placed on the beam support member Then, both ends of the second enveloping piece are connected and fixed so as to constitute an enclosure having a shape that matches the shape of the column to be built, and then a predetermined column structural rebar is placed at the column construction planned position. In addition to the beam joint part, temporarily form a formwork for building a predetermined pillar, and then place the concrete frame, How to build pillars and beams the joint, characterized in that embedded in the pillar concrete of.

The beam is made of a steel material in which flanges are continuously provided on the upper and lower sides of the web, and the upper and lower flanges at the joint end portions of the beam are respectively cut out so as to be tapered to form notched edges. For fixing, the notched edges of adjacent beams are fixed to face each other, and a plane L-shaped connecting plate is fixed to the web of the adjacent beams, and the upper surface of the lower flange of the adjacent beam and the lower surface of the upper flange The method for constructing a column and a beam according to claim 1, wherein the horizontal connection plate is fixed to each.

A member used by being attached to an adjacent beam, comprising a plate-like substrate having a planar shape along the outer periphery of a column joining the beam, comprising a first enclosure piece and a second enclosure piece, The first enclosure piece can be fixed to the beam, and the second enclosure piece can be connected between the ends of the first enclosure piece, and is fixed to the concrete inside the base. An enclosing member having a fixing member, wherein the base has a height equal to a height of the beam.