JP4025924B2

JP4025924B2 - Precast concrete frame

Info

Publication number: JP4025924B2
Application number: JP2003013247A
Authority: JP
Inventors: 正三加藤
Original assignee: Obayashi Corp
Current assignee: Obayashi Corp
Priority date: 2003-01-22
Filing date: 2003-01-22
Publication date: 2007-12-26
Anticipated expiration: 2023-01-22
Also published as: JP2004225337A

Description

【０００１】
【発明の属する技術分野】
この発明は、プレキャストコンクリート製架構体に関し、特に、ラーメンないしはトラス形状のプレキャストコンクリート製架構体に関するものである。
【０００２】
【従来の技術】
橋桁などの構造形式として、トラス形状やラーメン形状の架構体が知られており、このような形状の架構体は、全体的に剛性が高い割には、軽量であるという特徴を有している。
【０００３】
この種の架構体は、通常、鋼材で構成されているが、構成材料にコンクリートを用いると、鋼材に比べて重量が重くなるものの、より撓み難く、防食面でのメンテナンスも有利になる。
【０００４】
トラス形状やラーメン形状の架構体をコンクリートで形成する際には、型枠を使用して、下から上に順次コンクリートを打設することで形成されるが、このような方法では、型枠，支保工が複雑で、かつ、不安定であり、打ち上がりコンクリートの品質にもバラツキが生じるという問題がある。
【０００５】
このような問題を解決するに、例えば、特許文献１には、プレキャストコンクリート製の部材を用いて、トラス形状の架構体を形成することが提案されている。この特許文献１に提案されている方法では、プレキャストコンクリート製の主材と、同コンクリート製の接合部材とを用いて、トラス形状の架構体を形成する。
【０００６】
主材は、トラス構造の弦材となるものであって、上下方向に所定の間隔を隔てて設置される一対から構成され、接合部材は、×印状に形成されていて、トラス材となるものであって、４つの端部を主材に設けられた受部にＰＣ鋼材を挿通して緊結することにより固定される。
【０００７】
しかしながら、このような従来のプレキャストコンクリート製のトラス架構体には、以下に説明する課題があった。
【０００８】
【特許文献１】
特公平７−１１９５００号公報
【０００９】
【発明が解決しようとする課題】
すなわち、特許文献１に開示されている架構体では、×印状の接合部材は、外周側の４つ端部を、主材にそれぞれＰＣ鋼材を挿通して固定するので、接合部材と主材との結合作業が煩雑であり、しかも、主材と接合部材との間の結合部は、トラス構造で重要な個所であるが、この部分をＰＣ鋼材の挿通緊結で固定すると、結合強度にバラツキが発生し易く、架構体の品質維持に問題が発生する恐れがあった。
【００１０】
この場合、トラス構造は、特許文献１に開示されている形状だけでなく、×印状の結合部材に加えて、例えば、主材の長手方向と直交する方向に垂直材を配置することも行われているが、このような形状のトラス構造では、主材と結合材および垂直材の３部材結合部が発生し、このような結合部を個別作業により、結合するとより一層作業が煩雑になり、品質にもバラツキが一層発生し易くなる。
【００１１】
本発明は、このような従来の問題点に鑑みてなされたものであって、その目的とするところは、構成部材同士の結合部を高品質に維持することができるプレキャストコンクリート製架構体を提供することにある。
【００１２】
【課題を解決するための手段】
上記目的を達成するために、本発明は、上下方向に所定の間隔を置いて平行に配置される一対の上，下水平材と、両端が前記水平材に結合され、前記上，下水平材の長手方向と直交する垂直材とを備え、前記垂直材が前記上，下水平材の長手方向に沿って所定の間隔を隔てて複数配置されるラーメン形状のプレキャストコンクリート製架構体であって、前記垂直材の両端と前記上，下水平材との間に設けられる一対の２部材結合部を含み、前記上，下水平材を適宜長さで分断した上，下水平材ピースが、前記垂直材の両端に予め一体形成された概略Ｉ字形のプレキャストコンクリートユニットを備え、前記プレキャストコンクリートユニットの複数を、天地を交互に逆転させた状態で順次隣接配置し、前記上，下水平材ピースの端部間に接合部を介在させて、分断部分を相互に連結するようにした。
【００１３】
このように構成したプレキャストコンクリート製架構体によれば、垂直材の両端と上，下水平材との間に設けられる一対の２部材結合部を含み、上，下水平材を適宜長さで分断した上，下水平材ピースが、垂直材の両端に予め一体形成された概略Ｉ字形のプレキャストコンクリートユニットを備え、プレキャストコンクリートユニットの複数を、天地を交互に逆転させた状態で順次隣接配置し、上，下水平材ピースの端部間に接合部を介在させて、分断部分を相互に連結してラーメン形状の架構体とするので、２部材結合部の品質は、プレキャストコンクリートユニットを予め一体成形する際に、均一状態で確保することができる。
【００１４】
前記垂直材は、前記上，下水平材の長手方向に沿って等間隔で配置され、前記上，下水平材ピースは、前記垂直材を中心として、その両端に等長になるように延設され、かつ、各上，下水平材ピースの１／２長の合計が前記等間隔内に含まれる前記上，下水平材の長さとなるようにすることができる。
【００１５】
この構成によれば、１つのプレキャストコンクリートユニットだけでラーメン形状の架構体を構築することができるので、構成部材の点数を削減することができ、管理も容易になる。
【００１６】
前記上，下水平材は、分断位置が異なっていて、分断された前記上，下水平材ピースの長さを異ならせることができる。
【００１７】
また、本発明は、上下方向に所定の間隔を置いて平行に配置される一対の上，下水平材と、両端が前記水平材に結合され、前記上，下水平材の長手方向と直交する垂直材と、前記上，下水平材の長手方向に沿って所定の間隔を隔てて複数配置された前記垂直材の前後方向に隣接する一対の上下端に両端が結合され、前記上，下水平材の長手方向と斜交する複数の斜材とを備えたトラス形状のプレキャストコンクリート製架構体であって、前記垂直材と前記上，下水平材との間の２部材結合部、および、前記２部材結合部の一方に前後方向に隣接する一対の前記斜材の端部がそれぞれ結合した３部材結合部を含み、前記垂直材の両端部に、前記上，下水平材を適宜長さで分断した上，下水平材ピース、および、前記一対の斜材を適宜長さで分断した第１および第２斜材ピースとを予め一体成形したプレキャストコンクリートユニットを備え、前記プレキャストコンクリートユニットの複数を、天地および表裏を交互に逆転させた状態で順次隣接配置し、前記上，下水平材ピースの端部間、および、前記斜材ピースの端部間に接合部を介在させて、各分断部分を相互に連結するようにした。
【００１８】
このように構成したプレキャストコンクリート製架構体によれば、垂直材と上，下水平材との間の２部材結合部、および、２部材結合部の一方に前後方向に隣接する一対の斜材の端部がそれぞれ結合した３部材結合部を含み、垂直材の両端部に、上，下水平材を適宜長さで分断した上，下水平材ピース、および、一対の斜材を適宜長さで分断した第１および第２斜材ピースとを予め一体成形したプレキャストコンクリートユニットを備え、プレキャストコンクリートユニットの複数を、天地および表裏を交互に逆転させた状態で順次隣接配置し、上，下水平材ピースの端部間、および、斜材ピースの端部間に接合部を介在させて、各分断部分を相互に連結してトラス形状の架構体とするので、２部材および３部材結合部の品質は、ユニットを予め一体成形する際に、均一状態で確保することができる。
【００１９】
前記垂直材は、前記上，下水平材の長手方向に沿って等間隔で配置され、前記上，下水平材ピースは、前記垂直材を中心として、その両端に等長になるように延設され、かつ、各上，下水平材ピースの１／２長の合計が前記等間隔内に含まれる前記上，下水平材の長さとなるようにするとともに、前記第１および第２斜材ピースは、これらの各長さの総和が、前記斜材長に等しくなるようにすることができる。
【００２０】
この構成によれば、同一形状の１つのプレキャストコンクリートユニットだけでトラス形状の架構体を形成することができるので、構成部材の点数を削減することができ、管理も容易になる。
【００２１】
前記上，下水平材は、分断位置が異なっていて、前記上，下水平材ピースの長さを異ならせることができる。
【００２２】
前記接合部は、一方の前記水平材の端部に突設された略ロ字形の突起部と、他方の前記水平材の端部に突設され、前記突起部の外周に沿って重合可能な凸部とを備え、前記突起部と前記凸部とを重合させて固着した状態で、前記水平材の端部間に高強度コンクリートなどの硬化性充填材を充填することができる。
【００２３】
【発明の実施の形態】
以下、本発明の好適な実施の形態について、添付図面に基づいて詳細に説明する。図１から図４は、本発明にかかるプレキャストコンクリート製架構体の第１実施例を示している。
【００２４】
同図に示した実施例は、本発明をラーメン形式のプレキャストコンクリート（以下、ＰＣと略す）製架構体１０に適用した場合を例示している。図１は、本実施例のＰＣ製架構体１０の全体図であり、同図に示したＰＣ製架構体１０は、角形棒状の上，下水平材１２，１４および垂直材１６とを備えている。
【００２５】
上，下水平材１２，１４は、上下方向に所定の間隔を置いて平行に配置されている。垂直材１６は、両端が上，下水平材１２，１４に固設され、長手軸が各水平材１２，１４の長手方向と直交するように配置されている。
【００２６】
また、垂直材１６は、各水平材１２，１４の長手方向に沿って、等間隔になるように、複数配置されており、この結果、１ラーメン要素の水平材１２，１４の長さＬ_０は、垂直材１６の配置間隔と一致している。本実施例の場合、垂直材１６の全長と、１ピッチ分の水平材１２，１４の長さＬ_０とがほぼ等しくなるように設定されている。
【００２７】
このような構成のラーメン形状架構体１０は、本実施例の場合、１つの同一形状のＰＣユニット１８から構成されている。図２に、本実施例のＰＣユニット１８の詳細を示している。
【００２８】
同図に示したＰＣユニット１８は、上，下水平材１２，１４と垂直材１６の上下端との間に形成される概略Ｔ字形の上，下に配置された２部材結合部２０，２２を含んでいる。
【００２９】
垂直材１６の両端には、上，下水平材１２，１４を分断した上，下水平材ピース１２ａ，１４ａが一体に設けられていて、ＰＣユニット１８は、概略Ｉ字形に形成されている。
【００３０】
上，下水平材ピース１２ａ，１４ａは、垂直材１６の長手軸を中心として、その両端に等長になるように延設されていて、それぞれＬ_１，Ｌ_２の長さを有している。
【００３１】
本実施例の場合、上水平材ピース１２ａは、下水平材ピース１４ａよりも短くなるように分断されているが、その分断位置は、これに限る必要はなく、例えば、双方の長さを等長としてもよい。
【００３２】
また、本実施例の場合には、各水平材ピース１２ａ，１４ａの１／２長の合計、すなわち、１／２Ｌ_１＋１／２Ｌ_２が、前後方向に配置された一対の垂直材１６の配置間隔、すなわち、１ピッチ分の上，下水平材１２，１４の長さＬ_０に等しくなるように設定されている。
【００３３】
つまり、本実施例の場合には、各水平材ピース１２ａ，１４ａの長さの関係が、１／２Ｌ_１＋１／２Ｌ_２＝Ｌ_０となれば、どのような分断状態であってもよい。このような形状のＰＣユニット１８は、予め工場生産により一体成形される。この際に、上，下水平材１２，１４を適宜長さで分断した各水平材ピース１２ａ，１４ａ端部には、図３，４に示す接合部２４がそれぞれ設けられる。
【００３４】
これらの図に示した接合部２４は、一方の上ないしは下水平材ピース１２ａ，１４ａの端部に突設された突起部２４ａと、他方の上ないしは下水平材ピース１２ａ，１４ａの端部に突設された凸部２４ｂとを備えている。
【００３５】
突起部２４ａは、所定の幅の金属プレートを正方形の各辺上に位置されるようにして、上，下水平材ピース１２ａ，１４ａの端部に埋設したものであって、略ロ字形に配置されている。
【００３６】
凸部２４ｂは、所定幅を有し、先端に凹状の切欠部が設けられた略Ｅ字形の金属プレートを、正方形の各辺上に位置されるようにして、上，下水平材ピース１２ａ，１４ａの端部に埋設したものであって、上，下水平材ピース１２ａ，１４ａの端部同士が突き当たるようにスラスト方向に移動させると、各凸部２４ｂの内面が、突起部２４ａの外面に沿って重合するようになっている。
【００３７】
以上のような構造のＰＣユニット１８を用いてラーメン形状の架構体１０を形成する際には、まず、図２に示すように、１つのＰＣユニット１８が、上水平材ピース１２ａ側が上部に位置するように配置される。
【００３８】
次に、このＰＣユニット１８に隣接して他のＰＣユニット１８が設置される。この際には、図２に示すように、他のＰＣユニット１８は、天地を逆にして、上水平材１２ａ側が下方に位置するように配置される。
【００３９】
隣接配置された一対のＰＣユニット１８は、上，下水平材ピース１２ａ，１４ａの端部同士が対向するので、これらの端部同士をスラスト方向に移動させて、接合部２４の突起部２４ａと凸部２４ｂとを重合させる。
【００４０】
重合させた突起部２４ａと凸部２４ｂは、全周溶接などにより相互に固着させた状態で、上，下水平材ピース１２ａ，１４ａの端部間に高強度コンクリートなどの硬化性充填材２４ｃを充填して、上，下水平材ピース１２ａ，１４ａを相互に連結する。
【００４１】
以後は、同様な操作を順次繰り返えし、この操作を複数回繰り返すことで、図１に示すような、所望長さのラーメン形状のＰＣ製架構体１０が構築される。さて、以上のように構成したＰＣ製架構体１０によれば、垂直材１６の両端と上，下水平材１２，１４との間に設けられる一対の２部材結合部２０，２２を含み、上，下水平材１２，１４を適宜長さで分断した上，下水平材ピース１２ａ，１４ａが、垂直材１６の両端に予め一体形成された概略Ｉ字形のＰＣユニット１８を備え、ＰＣトユニット１８の複数を、天地を交互に逆転させた状態で順次隣接配置し、上，下水平材ピース１２ａ，１４ａの端部間に接合部２４を介在させて、分断部分を相互に連結してラーメン形状の架構体１０とするので、２部材結合部２０，２２の品質は、ＰＣトユニット１８を予め一体成形する際に、均一状態で確保することができ、これらの結合部２０，２２の品質を高くすることが可能になる。
【００４２】
また、このような２部材結合部２０，２２をＰＣユニット１８として予め形成しておくと、架構体１０を形成する際の作業性が大きく向上する。
【００４３】
また、本実施例の場合には、垂直材１６は、上，下水平材１２，１４の長手方向に沿って等間隔（長さＬ_０）で配置され、上，下水平材ピース１２ａ，１４ａは、垂直材１６を中心として、その両端に等長になるように延設され、かつ、各上，下水平材ピース１２ａ，１４ａの１／２長の合計（１／２Ｌ_１＋１／２Ｌ_２）が、等間隔内に含まれる上，下水平材１２，１４の長さＬ_０となるように設定している。
【００４４】
この構成によれば、１つのＰＣユニット１８だけでラーメン形状の架構体１０を構築することができるので、構成部材の点数を削減することができ、管理も容易になる。
【００４５】
また、本実施例の場合、ＰＣユニット１８間の連結に用いる接合部２４は、上，下水平材１２，１４の端部同士を突き合わせることだけで接合作業が行えるので、接合作業の効率も向上する。
【００４６】
図５および図６は、本発明にかかるプレキャストコンクリート製架構体の第２実施例を示しており、上記第１実施例と同一もしくは相当する部分には、同一符号を付してその説明を省略するとともに、以下にその特徴点についてのみ詳述する。
【００４７】
これらの図に示したＰＣ製架構体３０は、本発明をトラス形状にものに適用した場合を例示している。トラス形状のＰＣ架構体３０は、その全体構成を図５に示すように、ともに角形棒状に形成された一対の上，下水平材３２，３４と、複数の垂直材３６、および、複数の斜材３８とを有している。
【００４８】
一対の上，下水平材３２，３４は、上下方向に所定の間隔を置いて平行に配置される。垂直材３６は、両端が水平材３２，３４に固設され、長手軸が水平材３２，３４の長手軸と直交するように配置されている。
【００４９】
また、垂直材３６は、各水平材３２，３４の長手方向に沿って、等間隔なるように複数配置されており、この結果、１トラス要素の水平材３２，３４の長さＬ_１０は、垂直材３６の配置間隔と一致する長さとなる。本実施例の場合、垂直材３６の全長と、１ピッチ分の水平材３２，３４の長さＬ_１０とがほぼ等しくなるように設定されている。
【００５０】
斜材３８は、前後方向に隣接配置された一対の垂直材３６の上下端側に両端が結合され、長手軸が上，下水平材３２，３４と概略４５°の角度で斜交するように配置されている。
【００５１】
本実施例の場合、このような構成の架構体３０は、１つの同一形状のＰＣユニット４０から構成されている。図６に、本実施例のＰＣユニット４０の詳細を示している。
【００５２】
同図に示したＰＣユニット４０には、上水平材３２と垂直材３６の上端との間に形成される概略Ｔ字形の２部材結合部４２と、下水平材３４と垂直材３６の下端、および、一対の斜材３８の下端側とが合流した枝状の３部材結合部４４とが含まれている。
【００５３】
垂直材３６の両端には、上，下水平材３２，３４を分断した上，下水平材ピース３２ａ，３４ａが一体に設けられている。上，下水平材ピース３２ａ，３４ａは、垂直材３６の長手軸を中心として、その両端に等長になるように延設されていて、それぞれＬ_１１，Ｌ_１２の長さを有している。
【００５４】
本実施例の場合、上水平材ピース３２ａは、下水平材ピース３４ａよりも長くなるように分断されているが、その分断位置は、これに限る必要はなく、例えば、双方の長さを等長としてもよい。
【００５５】
また、本実施例の場合には、各水平材ピース３２ａ，３４ａの１／２長の合計、すなわち、１／２Ｌ_１１＋１／２Ｌ_１２が、前後方向に配置された一対の垂直材３６の配置間隔、すなわち、１ピッチ分の上，下水平材１２，１４の長さＬ_１０に等しくなるように設定されている。
【００５６】
また、垂直材３６の下部側に位置する３部材結合部４４には、前後方向に隣接配置される一対の斜材３８を分断した第１および第２斜材ピース３８ａ，３８ｂが設けられている。
【００５７】
第１斜材ピース３８ａは、長さＬ_１４を有し、第２斜材ピース３８ｂは、長さＬ_１５を有している。各斜材ピース３８ａ，３８ｂの長さの総和（Ｌ_１４＋Ｌ_１５）は、斜材３８の長さＬ_１３と等しくなるように設定されている。
【００５８】
このような形状のＰＣユニット４０は、予め工場生産により一体成形される。この際に、上，下水平材３２，３４および斜材３８を分断した部分、すなわち、上，下水平材ピース３２ａ，３４ａおよび第１，第２斜材ピース３８ａ，３８ｂのそれぞれの端部には、図３，４に示した第１実施例と同様な接合部２４がそれぞれ設けられる。
【００５９】
なお、本実施例の場合には、上，下水平材３２，３４に設けられた接合部２４は、上記実施例と同様に、上，下水平材３２，３４をスラスト方向に移動させて付き合わせるので、第１実施例と全く同じ構成でよいが、斜材３８に設ける接合部２４は、横移動を伴って端部同士を近接させるので、突起部２４ａと凸部２４ｂとが干渉する恐れがあるので、例えば、突起部２４ａの対向する２枚の長さを短くするなどの対策を施すことが望ましい。
【００６０】
以上のような構造のＰＣユニット４０を用いてトラス形状の架構体３０を形成する際には、まず、図６に示すように、１つのＰＣユニット４０が、上水平材ピース３２ａ側が上部に位置するように配置される。
【００６１】
次に、このＰＣユニット４０に隣接して他のＰＣユニット４０が設置される。この際には、図６に示すように、他のＰＣユニット４０は、天地および表裏を逆にして、上水平材ピース３２ａ側が下方に位置するように配置される。
【００６２】
隣接配置された一対のＰＣユニット４０は、上，下水平材ピース３２ａ，３４ａの端部同士が対向するので、これらの端部同士をスラスト方向に移動させて、接合部２４の突起部２４ａと凸部２４ｂとを重合させる。
【００６３】
この際に、斜材ピース３８ａ，３８ｂの端部同士も近接させて、同様に、接合部２４の突起部２４ａと凸部２４ｂとを重合させる。重合させた突起部２４ａと凸部２４ｂは、全周溶接などにより相互に固着させた状態で、上，下水平材ピース３２ａ，３４ａおよび斜材ピース３８ａ，３８ｂの端部間に高強度コンクリートなどの硬化性充填材２４ｃを充填して、これらを連結する。
【００６４】
以後は、同様な操作を順次繰り返えし、この操作を複数回繰り返すことで所望長さのトラス形状のＰＣ製架構体３０が構築される。さて、以上のように構成したトラス形状架構体３０によれば、垂直材３６と上，下水平材３２，３４との間の２部材結合部４２、および、２部材結合部４２の一方に前後方向に隣接する一対の斜材３８の端部がそれぞれ結合した３部材結合部４４を含み、垂直材３６の両端部に、上，下水平材３２，３４を適宜長さで分断した上，下水平材ピース３２ａ，３４ａ、および、一対の斜材３８を適宜長さで分断した第１および第２斜材ピース３８ａ，３８ｂとを予め一体成形したＰＣユニット４０を備え、ＰＣユニット４０の複数を、天地および表裏を交互に逆転させた状態で順次隣接配置し、上，下水平材ピース３２ａ，３４ａの端部間、および、斜材ピース３８ａ，３８ｂの端部間に接合部２４を介在させて、各分断部分を相互に連結してトラス形状の架構体３０とするので、２部材および３部材結合部４２，４４の品質は、ユニット４０を予め一体成形する際に、均一状態で確保することができる。
【００６５】
また、本実施例の場合には、垂直材３６は、上，下水平材３２，３４の長手方向に沿って等間隔で配置され、上，下水平材ピース３２ａ，３４ａは、垂直材３６を中心として、その両端に等長になるように延設され、かつ、各上，下水平材ピース３２ａ，３４ａの１／２長の合計（１／２Ｌ_１１＋１／２Ｌ_１２）が、等間隔内に含まれる上，下水平材３２，３４の長さ（Ｌ_１０）となるようにするとともに、第１および第２斜材ピース３８ａ，３８ｂは、これらの各長さの総和（Ｌ_１４＋Ｌ_１５）が、斜材３８の長さ（Ｌ_１３）に等しくなるようにしている。
【００６６】
このため、同一形状の１つのＰＣユニット４０だけでトラス形状の架構体３０を形成することができるので、構成部材の点数を削減することができ、管理も容易になる。
【００６７】
なお、上記実施例では、トラスないしはラーメン形状の架構体の構成部材である上，下水平材１２，１４ないしは垂直材１６を角形棒状に形成したものを例示したが、本発明は、これに限定されることはなく、例えば、丸形棒状のものや、平板状のものにも適用することができる。
【００６８】
【発明の効果】
以上、詳細に説明したように、本発明にかかるプレキャストコンクリート製架構体によれば、構成部材数の低減を図り、かつ、構成部材同士の結合部を高品質に保つことができる。
【図面の簡単な説明】
【図１】本発明にかかるプレキャストコンクリート製架構体の第１実施例を示す全体正面図である。
【図２】図１の要部抽出説明図である。
【図３】図１の接合部の詳細斜視図である。
【図４】図３の接合部の接合完了状態の説明図である。
【図５】本発明にかかるプレキャストコンクリート製架構体の第２実施例を示す全体正面図である。
【図６】図５の要部抽出説明図である。
【符号の説明】
１０，３０プレキャストコンクリート（ＰＣ）製架構体
１２，３２上水平材
１２ａ，３２ａ上水平材ピース
１４，３４下水平材
１４ａ，３４ａ下水平材ピース
１６，３６垂直材
１８，４０プレキャストコンクリート（ＰＣ）ユニット
２４接合部
３８斜材
３８ａ第１斜材ピース
３８ｂ第２斜材ピース[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a precast concrete frame, and particularly to a precast concrete frame having a ramen or truss shape.
[0002]
[Prior art]
Truss and ramen-shaped frame structures are known as structural forms such as bridge girders, and such a frame structure is characterized by being light in weight despite its overall high rigidity. .
[0003]
This type of frame is usually made of steel. However, when concrete is used as a constituent material, the weight is heavier than that of steel, but it is more difficult to bend and maintenance on the anticorrosive surface is advantageous.
[0004]
When forming a truss-shaped or ramen-shaped frame structure with concrete, it is formed by placing concrete sequentially from the bottom up using a formwork. There is a problem that the support work is complicated and unstable, and the quality of the finished concrete also varies.
[0005]
In order to solve such a problem, for example, Patent Document 1 proposes forming a truss-shaped frame using a precast concrete member. In the method proposed in Patent Document 1, a truss-shaped frame is formed using a main material made of precast concrete and a joint member made of the concrete.
[0006]
The main material is a string material of a truss structure, and is composed of a pair installed in the vertical direction at a predetermined interval, and the joining member is formed in the shape of an X mark and becomes a truss material. In this case, the four end portions are fixed by inserting a PC steel material into a receiving portion provided in the main material and tightening it.
[0007]
However, such a conventional precast concrete truss structure has the following problems.
[0008]
[Patent Document 1]
Japanese Patent Publication No.7-119500 [0009]
[Problems to be solved by the invention]
That is, in the frame structure disclosed in Patent Document 1, the X-shaped joining members are fixed by inserting the PC steel material into the main material at the four ends on the outer peripheral side. The joint between the main material and the joining member is an important part of the truss structure, but if this part is fixed by inserting and tightening the PC steel material, the joint strength varies. There was a risk of problems in maintaining the quality of the frame.
[0010]
In this case, the truss structure is not limited to the shape disclosed in Patent Document 1, but in addition to the X-shaped coupling member, for example, a vertical member may be arranged in a direction perpendicular to the longitudinal direction of the main material. However, in the truss structure with such a shape, a three-member connecting portion of the main material, the binding material, and the vertical material is generated, and if such a connecting portion is joined by individual work, the work becomes more complicated. Further, the quality is more likely to vary.
[0011]
The present invention has been made in view of such conventional problems, and an object of the present invention is to provide a precast concrete frame structure capable of maintaining the joint portion between the constituent members with high quality. There is to do.
[0012]
[Means for Solving the Problems]
In order to achieve the above object, the present invention provides a pair of upper and lower horizontal members arranged in parallel at a predetermined interval in the vertical direction, and both ends coupled to the horizontal member, and the upper and lower horizontal members A vertical member perpendicular to the longitudinal direction of the frame, and a plurality of the vertical members arranged in a predetermined interval along the longitudinal direction of the upper and lower horizontal members, a frame structure made of pre-cast concrete, It includes a pair of two-member connecting portions provided between both ends of the vertical member and the upper and lower horizontal members, and the upper and lower horizontal members are appropriately divided into lengths. A precast concrete unit having a substantially I-shape formed in advance on both ends of the material is provided, and a plurality of the precast concrete units are sequentially arranged adjacent to each other with the top and bottom alternately reversed, and the ends of the upper and lower horizontal material pieces Joining between parts The interposed therebetween, and configured to connect the divided portions to each other.
[0013]
According to the precast concrete frame constructed in this way, it includes a pair of two-member joints provided between both ends of the vertical member and the upper and lower horizontal members, and the upper and lower horizontal members are divided by appropriate lengths. In addition, the lower horizontal piece has a substantially I-shaped precast concrete unit integrally formed in advance on both ends of the vertical piece, and a plurality of precast concrete units are sequentially arranged adjacent to each other with the top and bottom alternately reversed, The joints are interposed between the ends of the upper and lower horizontal pieces, and the divided parts are connected to each other to form a rigid frame structure. In doing so, it can be ensured in a uniform state.
[0014]
The vertical members are arranged at equal intervals along the longitudinal direction of the upper and lower horizontal members, and the upper and lower horizontal member pieces are extended to be equal in length at both ends with the vertical member as a center. In addition, the sum of the half lengths of the upper and lower horizontal material pieces can be the lengths of the upper and lower horizontal materials included in the equal interval.
[0015]
According to this configuration, since the frame structure having a ramen shape can be constructed with only one precast concrete unit, the number of components can be reduced, and management is facilitated.
[0016]
The upper and lower horizontal members have different dividing positions, and the lengths of the divided upper and lower horizontal members can be made different.
[0017]
Further, the present invention provides a pair of upper and lower horizontal members arranged in parallel at a predetermined interval in the vertical direction, and both ends coupled to the horizontal material, and orthogonal to the longitudinal direction of the upper and lower horizontal materials. Both ends are coupled to a vertical member and a pair of upper and lower ends adjacent to each other in the front-rear direction of the vertical member arranged at predetermined intervals along the longitudinal direction of the upper and lower horizontal members, and the upper and lower horizontal members A truss-shaped precast concrete frame comprising a plurality of diagonal members obliquely intersecting the longitudinal direction of the material, the two-member joint between the vertical member and the upper and lower horizontal members, and It includes a three-member coupling portion in which ends of a pair of diagonal members adjacent to each other in the front-rear direction are coupled to one of the two-member coupling portions, and the upper and lower horizontal members are appropriately lengthened at both ends of the vertical member. Divide the upper and lower horizontal pieces and the pair of diagonal materials by appropriate length. A precast concrete unit in which the first and second diagonal pieces are integrally formed in advance, and a plurality of the precast concrete units are sequentially arranged adjacent to each other in a state where the top and bottom and the front and back are alternately reversed. Each divided portion is connected to each other by interposing a joint portion between the end portions of the material pieces and between the end portions of the diagonal piece.
[0018]
According to the precast concrete frame constructed in this way, the two-member joint between the vertical member and the upper and lower horizontal members, and a pair of diagonal members adjacent to one of the two-member joint in the front-rear direction. It includes a three-member joint where the ends are joined to each other. The upper and lower horizontal members are divided into appropriate lengths at both ends of the vertical member, and the lower horizontal member piece and the pair of diagonal members are appropriately lengthened. It is equipped with a precast concrete unit in which the divided first and second diagonal pieces are integrally molded in advance, and a plurality of precast concrete units are arranged adjacent to each other in the state that the top and bottom and the front and back are alternately reversed. Two-member and three-member joints quality by connecting joints between the end portions of the pieces and between the end portions of the diagonal piece pieces and connecting the divided portions to each other. The unit Because the time of integral molding, it is possible to ensure a uniform state.
[0019]
The vertical members are arranged at equal intervals along the longitudinal direction of the upper and lower horizontal members, and the upper and lower horizontal member pieces are extended to be equal in length at both ends with the vertical member as a center. And the total length of the half lengths of the upper and lower horizontal material pieces is the length of the upper and lower horizontal materials included in the equal interval, and the first and second diagonal material pieces The total of these lengths can be made equal to the diagonal length.
[0020]
According to this configuration, since the truss-shaped frame can be formed by only one precast concrete unit having the same shape, the number of components can be reduced, and management is facilitated.
[0021]
The upper and lower horizontal members have different dividing positions, and the lengths of the upper and lower horizontal members can be made different.
[0022]
The joint is projected substantially at the end of one of the horizontal members and protruded at the end of the other horizontal member, and can be superposed along the outer periphery of the projection. A curable filler such as high-strength concrete can be filled between the end portions of the horizontal member in a state in which the protrusion and the protrusion are polymerized and fixed.
[0023]
DETAILED DESCRIPTION OF THE INVENTION
DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of the invention will be described in detail with reference to the accompanying drawings. 1 to 4 show a first embodiment of a precast concrete frame structure according to the present invention.
[0024]
The embodiment shown in the figure illustrates the case where the present invention is applied to a frame structure prefabricated concrete (hereinafter abbreviated as PC) 10 of a ramen type. FIG. 1 is an overall view of a PC frame structure 10 according to the present embodiment. The PC frame structure 10 shown in FIG. 1 includes upper and lower horizontal members 12, 14 and a vertical member 16 in the form of rectangular bars. Yes.
[0025]
The upper and lower horizontal members 12, 14 are arranged in parallel in the vertical direction with a predetermined interval. The vertical member 16 is fixed to the upper and lower horizontal members 12 and 14 at both ends, and is arranged so that the longitudinal axis is orthogonal to the longitudinal direction of the horizontal members 12 and 14.
[0026]
Further, a plurality of the vertical members 16 are arranged at equal intervals along the longitudinal direction of the horizontal members 12, 14, and as a result, the length L ₀ of the horizontal members 12, 14 of one ramen element. Corresponds to the arrangement interval of the vertical members 16. In this embodiment, the entire length of the uprights 16, and the length L ₀ of the horizontal member 12, 14 for one pitch is set to be substantially equal.
[0027]
In the present embodiment, the ramen-shaped frame body 10 having such a configuration is composed of one PC unit 18 having the same shape. FIG. 2 shows details of the PC unit 18 of this embodiment.
[0028]
The PC unit 18 shown in the figure has a two-member connecting portion 20, 22 arranged above and below a generally T-shape formed between the upper and lower horizontal members 12, 14 and the upper and lower ends of the vertical member 16. Is included.
[0029]
At the both ends of the vertical member 16, the upper and lower horizontal members 12, 14 are divided, and the lower horizontal member pieces 12a, 14a are integrally provided, and the PC unit 18 is formed in a substantially I-shape.
[0030]
The upper and lower horizontal member pieces 12a and 14a are extended to be equal in length at both ends with the longitudinal axis of the vertical member 16 as the center, and have lengths L ₁ and L ₂ , respectively. .
[0031]
In the case of the present embodiment, the upper horizontal member piece 12a is divided so as to be shorter than the lower horizontal member piece 14a, but the dividing position is not limited to this. It may be long.
[0032]
Further, in the case of the present embodiment, the arrangement of the pair of vertical members 16 in which the total of the ½ length of each horizontal member piece 12a, 14a, that is, ½L ₁ + ½L ₂ is arranged in the front-rear direction. interval, i.e., on the one pitch is set to be equal to the length L ₀ of the lower horizontal member 12.
[0033]
In other words, in the case of the present embodiment, any divided state may be employed as long as the length relationship between the horizontal member pieces 12a and 14a is 1 / 2L ₁ + 1 / 2L ₂ = L ₀ . The PC unit 18 having such a shape is integrally formed in advance by factory production. At this time, the joint portions 24 shown in FIGS. 3 and 4 are respectively provided at the ends of the horizontal member pieces 12a and 14a obtained by dividing the upper and lower horizontal members 12 and 14 by appropriate lengths.
[0034]
The joints 24 shown in these drawings are provided at the end of one upper or lower horizontal piece 12a, 14a and the other upper or lower horizontal piece 12a, 14a. And a projecting convex portion 24b.
[0035]
The protrusions 24a are embedded in the ends of the upper and lower horizontal material pieces 12a, 14a so that a metal plate having a predetermined width is positioned on each side of the square, and are arranged in a substantially square shape. Has been.
[0036]
The convex portion 24b has a predetermined width, and a substantially E-shaped metal plate having a concave notch at the tip thereof is positioned on each side of the square so that the upper and lower horizontal member pieces 12a, 14a, the upper and lower horizontal pieces 12a and 14a are moved in the thrust direction so that the ends of the pieces abut against each other. It is supposed to polymerize along.
[0037]
When the ramen-shaped frame 10 is formed using the PC unit 18 having the above structure, first, as shown in FIG. 2, one PC unit 18 is positioned on the upper horizontal piece 12a side. To be arranged.
[0038]
Next, another PC unit 18 is installed adjacent to the PC unit 18. At this time, as shown in FIG. 2, the other PC unit 18 is disposed so that the top horizontal member 12 a side is positioned downward with the top and bottom reversed.
[0039]
Since the ends of the upper and lower horizontal material pieces 12a and 14a face each other in the pair of PC units 18 arranged adjacent to each other, the ends are moved in the thrust direction so that the protrusions 24a of the joint portion 24 and The convex portion 24b is polymerized.
[0040]
The superposed projections 24a and projections 24b are fixed to each other by welding all around, and a curable filler 24c such as high-strength concrete is placed between the ends of the upper and lower horizontal material pieces 12a and 14a. Fill and connect the upper and lower horizontal pieces 12a, 14a to each other.
[0041]
Thereafter, similar operations are sequentially repeated, and by repeating this operation a plurality of times, a ramen-shaped PC frame structure 10 having a desired length as shown in FIG. 1 is constructed. Now, the PC frame structure 10 configured as described above includes a pair of two-member coupling portions 20 and 22 provided between both ends of the vertical member 16 and the upper and lower horizontal members 12 and 14. The lower horizontal members 12, 14 are divided into appropriate lengths, and the lower horizontal member pieces 12 a, 14 a are each provided with a substantially I-shaped PC unit 18 integrally formed in advance on both ends of the vertical member 16. Are placed adjacent to each other in a state where the top and bottom are alternately reversed, and a joint portion 24 is interposed between the end portions of the upper and lower horizontal material pieces 12a and 14a to connect the divided portions to each other to form a ramen shape. Therefore, the quality of the two-member connecting portions 20 and 22 can be ensured in a uniform state when the PC unit 18 is integrally formed in advance, and the quality of these connecting portions 20 and 22 can be ensured. It becomes possible to make it higher.
[0042]
Further, if such two-member connecting portions 20 and 22 are formed in advance as the PC unit 18, workability when forming the frame body 10 is greatly improved.
[0043]
In the case of the present embodiment, the vertical members 16 are arranged at equal intervals (length L ₀ ) along the longitudinal direction of the upper and lower horizontal members 12 and 14, and the upper and lower horizontal member pieces 12a and 14a. Is extended to be equal in length at both ends with the vertical member 16 as the center, and the total of 1/2 length of each of the upper and lower horizontal material pieces 12a, 14a (1 / 2L ₁ + 1 / 2L ₂ ) Is set to be the length L _{0 of the} upper and lower horizontal members 12 and 14 included in the equal interval.
[0044]
According to this configuration, the ramen-shaped frame body 10 can be constructed with only one PC unit 18, so that the number of components can be reduced and management is facilitated.
[0045]
Further, in the case of the present embodiment, the joining portion 24 used for the connection between the PC units 18 can be joined only by abutting the end portions of the upper and lower horizontal members 12, 14. improves.
[0046]
5 and 6 show a second embodiment of the precast concrete frame according to the present invention. The same or corresponding parts as those in the first embodiment are designated by the same reference numerals and the description thereof is omitted. In the following, only the feature points will be described in detail.
[0047]
The PC frame 30 shown in these drawings illustrates the case where the present invention is applied to a truss shape. As shown in FIG. 5, the truss-shaped PC frame 30 has a pair of upper and lower horizontal members 32, 34, a plurality of vertical members 36, and a plurality of diagonal members, both of which are formed in a square bar shape. Material 38.
[0048]
The pair of upper and lower horizontal members 32 and 34 are arranged in parallel at a predetermined interval in the vertical direction. Both ends of the vertical member 36 are fixed to the horizontal members 32 and 34, and the longitudinal axis is arranged so as to be orthogonal to the longitudinal axes of the horizontal members 32 and 34.
[0049]
The vertical member 36 along the longitudinal direction of each horizontal member 32, 34 has a plurality of arranged such equal intervals become, as a result, the length _{L 10} of the horizontal member 32, 34 of 1 truss elements, The length coincides with the arrangement interval of the vertical members 36. In this embodiment, the entire length of the uprights 36, and the length L ₁₀ of the one pitch of the horizontal member 32 and 34 are set to be substantially equal.
[0050]
The diagonal member 38 is coupled at both ends to the upper and lower ends of a pair of vertical members 36 arranged adjacent to each other in the front-rear direction, and the longitudinal axis is oblique to the upper and lower horizontal members 32 and 34 at an angle of approximately 45 °. Has been placed.
[0051]
In the case of the present embodiment, the frame body 30 having such a configuration is composed of one PC unit 40 having the same shape. FIG. 6 shows details of the PC unit 40 of this embodiment.
[0052]
The PC unit 40 shown in the figure includes a substantially T-shaped two-member connecting portion 42 formed between the upper horizontal member 32 and the upper end of the vertical member 36, the lower horizontal member 34 and the lower end of the vertical member 36, And the branch-like three-member coupling | bond part 44 which the lower end side of a pair of diagonal material 38 merged is contained.
[0053]
At both ends of the vertical member 36, upper and lower horizontal members 32 and 34 are divided, and lower horizontal member pieces 32a and 34a are integrally provided. The upper and lower horizontal member pieces 32a and 34a are extended to be equal in length at both ends with the longitudinal axis of the vertical member 36 as the center, and have lengths L ₁₁ and L ₁₂ respectively. .
[0054]
In the case of the present embodiment, the upper horizontal member piece 32a is divided so as to be longer than the lower horizontal member piece 34a, but the dividing position need not be limited to this, for example, the lengths of both are equal. It may be long.
[0055]
In the case of the present embodiment, the arrangement of the pair of vertical members 36 in which the total of the half lengths of the horizontal member pieces 32a and 34a, that is, 1 / 2L ₁₁ + 1 / 2L ₁₂ is arranged in the front-rear direction. interval, i.e., on the one pitch is set to be equal to the length L ₁₀ of the lower horizontal member 12.
[0056]
Further, the three-member coupling portion 44 located on the lower side of the vertical member 36 is provided with first and second oblique member pieces 38a and 38b obtained by dividing a pair of oblique members 38 arranged adjacent to each other in the front-rear direction. .
[0057]
First swash material piece 38a has a length _{L 14,} second diagonal materials piece 38b has a length _{L 15.} The total length (L ₁₄ + L ₁₅ ) of the diagonal pieces 38 a and 38 b is set to be equal to the length L ₁₃ of the diagonal material 38.
[0058]
The PC unit 40 having such a shape is integrally formed in advance by factory production. At this time, the upper and lower horizontal members 32 and 34 and the diagonal member 38 are divided, that is, at the respective ends of the upper and lower horizontal member pieces 32a and 34a and the first and second diagonal member pieces 38a and 38b. Are provided with joint portions 24 similar to those of the first embodiment shown in FIGS.
[0059]
In the case of this embodiment, the joints 24 provided on the upper and lower horizontal members 32 and 34 are attached by moving the upper and lower horizontal members 32 and 34 in the thrust direction as in the above embodiment. Therefore, the joint portion 24 provided on the diagonal member 38 brings the end portions close to each other with lateral movement, so that the projection 24a and the projection 24b may interfere with each other. Therefore, for example, it is desirable to take measures such as shortening the length of the two opposing projecting portions 24a.
[0060]
When the truss-shaped frame 30 is formed using the PC unit 40 having the above structure, first, as shown in FIG. 6, one PC unit 40 is positioned so that the upper horizontal member piece 32a side is at the upper side. To be arranged.
[0061]
Next, another PC unit 40 is installed adjacent to the PC unit 40. At this time, as shown in FIG. 6, the other PC units 40 are arranged so that the top horizontal member piece 32 a side is positioned downward with the top and bottom and the front and back being reversed.
[0062]
Since the ends of the upper and lower horizontal material pieces 32a and 34a are opposed to each other in the pair of adjacent PC units 40, these ends are moved in the thrust direction, and the protrusions 24a of the joint portion 24 are connected. The convex portion 24b is polymerized.
[0063]
At this time, the end portions of the diagonal pieces 38a and 38b are also brought close to each other, and similarly, the protruding portion 24a and the protruding portion 24b of the joining portion 24 are polymerized. The superposed projections 24a and projections 24b are fixed to each other by, for example, all-around welding, and the like, between the ends of the upper and lower horizontal material pieces 32a and 34a and the diagonal material pieces 38a and 38b. These curable fillers 24c are filled and connected.
[0064]
Thereafter, similar operations are sequentially repeated, and the truss-shaped PC frame 30 having a desired length is constructed by repeating this operation a plurality of times. Now, according to the truss-shaped frame body 30 configured as described above, the two-member connecting portion 42 between the vertical member 36 and the upper and lower horizontal members 32 and 34, and one of the two-member connecting portions 42 are front and rear. The upper and lower horizontal members 32, 34 are divided into appropriate lengths at both ends of the vertical member 36, including a three-member connecting portion 44 in which the ends of a pair of diagonal members 38 adjacent to each other are connected. A horizontal unit piece 32a, 34a, and a first and second diagonal member 38a, 38b obtained by dividing a pair of diagonal members 38 with appropriate lengths are preliminarily integrally formed. In this state, the top and bottom and the front and back are alternately reversed, and are sequentially arranged adjacent to each other, and the joint 24 is interposed between the ends of the upper and lower horizontal pieces 32a and 34a and between the ends of the diagonal pieces 38a and 38b. To connect each part to each other. Since the scan shape of rack assembly 30, the quality of the second member and the third member coupling portion 42 and 44, when the previously integrally molded unit 40, it is possible to ensure a uniform state.
[0065]
In the case of the present embodiment, the vertical members 36 are arranged at equal intervals along the longitudinal direction of the upper and lower horizontal members 32, 34, and the upper and lower horizontal member pieces 32a, 34a The center is extended so as to have the same length at both ends, and the total of the ½ lengths of the upper and lower horizontal member pieces 32a and 34a (1 / 2L ₁₁ + 1 / 2L ₁₂ ) are within an equal interval. And the length (L ₁₀ ) of the upper and lower horizontal members 32 and 34 included in the first and second diagonal member pieces 38a and 38b, the sum of these lengths (L ₁₄ + L _15). ) Is equal to the length (L ₁₃ ) of the diagonal member 38.
[0066]
For this reason, since the truss-shaped frame 30 can be formed with only one PC unit 40 having the same shape, the number of components can be reduced, and management is facilitated.
[0067]
In the above-described embodiment, the trusses or ramen-shaped frame members and the lower horizontal members 12, 14 or the vertical members 16 are formed in the shape of square bars. However, the present invention is not limited to this. For example, the present invention can be applied to a round bar shape or a flat shape.
[0068]
【The invention's effect】
As described above in detail, according to the precast concrete frame structure according to the present invention, it is possible to reduce the number of constituent members and to maintain high quality joints between the constituent members.
[Brief description of the drawings]
FIG. 1 is an overall front view showing a first embodiment of a precast concrete frame according to the present invention.
FIG. 2 is an explanatory diagram for extracting a main part of FIG. 1;
FIG. 3 is a detailed perspective view of the joint of FIG.
FIG. 4 is an explanatory diagram of a joining completion state of the joint part of FIG. 3;
FIG. 5 is an overall front view showing a second embodiment of a precast concrete frame structure according to the present invention.
6 is an explanatory diagram of extraction of main parts of FIG. 5. FIG.
[Explanation of symbols]
10, 30 Precast concrete (PC) frame 12, 32 Upper horizontal member 12a, 32a Upper horizontal member piece 14, 34 Lower horizontal member 14a, 34a Lower horizontal member piece 16, 36 Vertical member 18, 40 Precast concrete (PC) Unit 24 Joining section 38 Diagonal material 38a First diagonal material piece 38b Second diagonal material piece

Claims

A pair of upper and lower horizontal members arranged in parallel at predetermined intervals in the vertical direction;
Both ends are coupled to the horizontal member, and a vertical member perpendicular to the longitudinal direction of the upper and lower horizontal members is provided.
The vertical member is a precast concrete frame structure having a ramen shape in which a plurality of the vertical members are arranged at predetermined intervals along the longitudinal direction of the upper and lower horizontal members,
It includes a pair of two-member connecting portions provided between both ends of the vertical member and the upper and lower horizontal members, and the upper and lower horizontal members are appropriately divided into lengths. It is equipped with a precast concrete unit with a roughly I-shape formed in advance on both ends of the material,
A plurality of the precast concrete units are sequentially arranged adjacent to each other in a state where the top and bottom are alternately reversed,
A precast concrete frame structure characterized in that a joint portion is interposed between end portions of the upper and lower horizontal material pieces to connect the divided portions to each other.

The vertical members are arranged at equal intervals along the longitudinal direction of the upper and lower horizontal members,
The upper and lower horizontal material pieces are extended so as to have the same length at both ends with the vertical material as the center, and the sum of the half lengths of the upper and lower horizontal material pieces is within the equal interval. 2. The precast concrete frame structure according to claim 1, wherein the length is the length of the upper and lower horizontal members included in the frame.

2. The precast concrete frame structure according to claim 1, wherein the upper and lower horizontal members have different dividing positions, and the lengths of the upper and lower horizontal members are made different.

A pair of upper and lower horizontal members arranged in parallel at predetermined intervals in the vertical direction;
Both ends are coupled to the horizontal material, and a vertical material perpendicular to the longitudinal direction of the upper and lower horizontal materials,
Both ends are coupled to a pair of upper and lower ends adjacent to each other in the front-rear direction of the vertical member arranged at predetermined intervals along the longitudinal direction of the upper and lower horizontal members, and the longitudinal direction of the upper and lower horizontal members A truss-shaped precast concrete frame with a plurality of diagonal members obliquely crossed with
A two-member coupling portion between the vertical member and the upper and lower horizontal members, and a three-member coupling portion in which ends of the pair of diagonal members adjacent to each other in the front-rear direction are coupled to one of the two-member coupling portions The upper and lower horizontal members are divided into appropriate lengths at both ends of the vertical member, and the lower horizontal member pieces and the pair of diagonal members are divided into appropriate lengths. Equipped with precast concrete unit that pre-integrated with diagonal piece,
A plurality of the precast concrete units are sequentially arranged adjacent to each other in a state where the top and bottom and the front and back are alternately reversed,
A precast concrete frame structure characterized in that joints are interposed between the ends of the upper and lower horizontal piece pieces and between the ends of the diagonal piece pieces, and the divided portions are connected to each other.

The vertical members are arranged at equal intervals along the longitudinal direction of the upper and lower horizontal members,
The upper and lower horizontal material pieces are extended so as to have the same length at both ends with the vertical material as the center, and the sum of the half lengths of the upper and lower horizontal material pieces is within the equal interval. And the length of the upper and lower horizontal members included in the
5. The precast concrete frame structure according to claim 4, wherein the first and second diagonal pieces are configured such that the sum of their lengths is equal to the diagonal length.

6. The precast concrete frame structure according to claim 5, wherein the upper and lower horizontal members have different dividing positions and have different lengths of the upper and lower horizontal members.

The joint portion is a substantially B-shaped protrusion projecting from the end of one of the horizontal members,
A projecting portion projecting from an end of the other horizontal member and capable of being polymerized along an outer periphery of the projecting portion;
7. The curable filler such as high-strength concrete is filled between the end portions of the horizontal member in a state in which the protrusions and the protrusions are superposed and fixed. A precast concrete frame structure according to item 1.