JP4589516B2

JP4589516B2 - Construction method of roof frame

Info

Publication number: JP4589516B2
Application number: JP2000327753A
Authority: JP
Inventors: 博志畝; 英治松井; 斉清水; 誠貞永; 久夫向井; 幸雄増田; 爲博荒木; 英俊林田; 潤朗合田
Original assignee: Takenaka Corp
Current assignee: Takenaka Corp
Priority date: 2000-10-26
Filing date: 2000-10-26
Publication date: 2010-12-01
Anticipated expiration: 2020-10-26
Also published as: JP2002129655A

Description

【０００１】
【発明の属する技術分野】
この発明は、無柱の大空間屋根架構を構成する直線状の屋根構造材を、中心部（内周部）のコンプレッションリング及び外周部のテンションリングを利用して屋根全体を地組みの状態から立ち上げて構築する技術の分野に属する。
【０００２】
【従来の技術】
従来、無柱の大空間屋根架構としては、ドーム屋根架構、あるいはケーブルネットの吊り屋根架構などが一般的であった。
【０００３】
本出願人らは、前記ドーム屋根架構に比して屋根材の応力負荷、柱脚へのスラスト力（放射方向への水平力）を数分の一に低減でき、また、ケーブルネット状吊り屋根架構などに比して現場施工の技術が容易な山形断面屋根架構を開発して、先の特願平１１−２２０９００号、特願平１１−２７２１０７号、特願平１１−２２０９３４号を初めとする複数の出願に提案している。
【０００４】
山形断面屋根架構の実施形態を図１と図２に例示している。外周縁にテンションリング１が配置され、内周縁（中心部）にコンプレッションリング２が配置され、前記二つのリング１、２は、平面的に見ると同心の相似形配置に設けられている。前記テンションリング１とコンプレッションリング２との間に、屋根架構が図３のように山形断面に組み立てられている。したがって、構造物としてはドーナツ形状をなす。
【０００５】
図１に示したように、山形断面屋根架構は、前記テンションリング１とコンプレッションリング２との間に山形状に組み立てた屋根構造材（トラス構造材）３を、リングの線方向に一定の間隔で平行配置に複数林立させ、水平方向にリング状をなす横繋ぎ材で結構を行い、かくして林立する屋根構造材３…の間の外面に屋根材（膜材）を張って図２の構造物が完成されている。
【０００６】
ところで、無柱の大空間屋根架構の構築構法としては、特公昭５８−３３３４１号公報に記載された「ドーム構築法」が広く知られている。この構法は、ドーム屋根構造材の複数の節点にヒンジを使用して、地面レベルで水平方向に展開した状態に組み立て、同屋根構造材の両端をドーム周辺部と接合し、しかる後に前記ドーム屋根構造材をジャッキアップして立ち上げを行い、所定位置に立ち上げた段階で追加接合、補剛して完成する工程を特徴とする。
【０００７】
【本発明が解決しようとする課題】
上記特公昭５８−３３３４１号公報に記載された「ドーム構築法」の場合は、屋根架構の断面形状がアーチ形状であり、個々の屋根構造材は基本的にアーチ形状に湾曲している。そのため図１３に例示したように、屋根構造材の各節点に使用した複数のヒンジａ〜ｃのうち、中間の第２ヒンジｂが、図１３に示したように第１ヒンジａと第３ヒンジｃを結ぶ直線Ｐ−Ｑの外側へかなり大きく離れている。したがって、ジャッキアップ時に第２ヒンジｂの展開角度が１８０゜に接近したり、あるいは１８０゜を超えて反転するような心配はない。
【０００８】
つまり、ドーム屋根の場合は、ジャッキアップ時の屋根材荷重は常に外向きの軸圧縮荷重としてのみ作用するので、立ち上げ時の形状保持効果に優れ、ジャッキアップの進捗に従ってドーム屋根の全体が静的に追随する性質があり、安定性、安全性の高いジャッキアップ作業を進めることができる。
【０００９】
ところが、上記山形断面屋根架構の場合は、屋根構造材３が基本的に直線形状であるため、これを地組みに適切な長さの複数部分に区分し、その各節点に使用した複数のヒンジ４、５、６うち、中間の第２ヒンジ５は、図３のように第１ヒンジ４と第３ヒンジ６を結ぶ直線にごく接近した構成となる。その結果、屋根構造材３の立ち上げ作業（ジャッキアップ）が最終段階まで進むと、図５に示したように屋根構造材３の自重Ｗが第２ヒンジ５の内方への展開を加速する作用力として働くところとなり、ひいては同屋根材３の山形頂辺部８を上向きに押し上げる作用力（自然力）を発生し、立ち上げ力（ジャッキアップの力）を超越して屋根架構が上昇する、名付けて「急変現象」を発生し、立ち上げ作業のコントロールを失う危険性のあることが把握された。
【００１０】
ちなみに図９は、立ち上げ時の上昇揚程（又は残り揚程）における支持反力の大きさの変化を、揚程との関係で測定した結果を示す。残り揚程が０．２ｍ近辺で支持反力の大きさが急降下し、遂にはマイナス荷重（引っ張り）になる「急変現象」が明確に現れている。
【００１１】
よって、本発明の目的は、特には直線形状で複数の節点にヒンジを使用した屋根構造材による無柱の大空間屋根架構の構築における、上記「急変現象」の危険性、弊害を未然に防ぐように改良、工夫した、安全で効率の良い構築構法を提供することである。
【００１２】
【課題を解決するための手段】
上述の課題を解決するための手段として、請求項１に記載した発明に係る屋根架構の構築構法は、
無柱の大空間屋根架構を構成する直線的な屋根構造材を、地組みに適切な長さの複数部分に区分してその各節点部をそれぞれヒンジにより連結した構造とし、地面レベルで略水平方向に展開した形態に組み立てる段階と、
前記屋根構造材の一端部は、地上の外周側本設位置に設けたテンションリングの柱脚へ回転可能にピン連結し、他端は内周側のテンションリングと連結し、前記ヒンジのうち、立ち上げ時に外隅を形成するヒンジの外側端部には、当該ヒンジが少なくとも１８０゜近傍にまで展開すると相当な回転抵抗力を発揮する抵抗体を設ける段階と、
前記屋根構造材における内周側のテンションリング部分に起立力を加えて屋根構造材の立ち上げを行い、起立姿勢の屋根構造材における各ヒンジを固定化する段階と、から成ることを特徴とする。
【００１３】
請求項２記載の発明に係る山形断面屋根架構の構築構法は、
山形断面の大空間屋根架構を構成する直線的な屋根構造材を、地組みに適切な長さの複数部分に区分してその各節点部をそれぞれヒンジにより連結した構造とし、地面レベルで略水平方向に展開した形態に組み立てる段階と、
前記屋根構造材における山形の両斜辺の下端部は、地上の本設位置に設けた内周側のコンプレッションリング及び外周側のテンションリングの各柱脚へ回転可能にピン連結し、また、前記ヒンジのうち、立ち上げ時に外隅を形成するヒンジの外側端部には、当該ヒンジが少なくとも１８０゜近傍にまで展開すると相当な回転抵抗力を発揮する抵抗体を設ける段階と、
前記屋根構造材における山形頂辺部に起立力を加えて屋根構造材の立ち上げを行い、起立姿勢の屋根構造材における各ヒンジを固定化する段階と、から成ることを特徴とする。
【００１４】
請求項３記載の発明は、請求項２に記載した山形断面屋根架構の構築構法において、
山形断面の両斜辺を形成する屋根構造材の両下端部は、地上の本設位置に設けた内周側のコンプレッションリング及び外周側のテンションリングの各柱脚へ回転可能にピン連結し、中央の山形頂辺部ともヒンジにより連結して、該山形頂辺部及び前記内周側のコンプレッションリング及び外周側のテンションリングの長手方向に並立する屋根構造材の大部分を地面レベルで略水平方向に展開した形態に組み立て、前記山形頂辺部に起立力を加えて屋根構造材の全体を合一に立ち上げることを特徴とする。
【００１５】
請求項４に記載した発明は、請求項１〜３のいずれか一に記載した屋根架構の構築構法において、
屋根構造材に設けた各ヒンジのうち、立ち上げ時に外隅を形成するヒンジの抵抗体として、同ヒンジで連結される屋根構造材の外側端部に、合成樹脂発泡体ブロックを、当該ヒンジが少なくとも１８０゜近傍にまで展開すると突き当たって抵抗を生ずる関係の配置に固定していることを特徴とする。
【００１６】
【発明の実施の形態】
以下、図面に基づいて、先ず請求項２〜４に記載した発明の実施形態を説明する。
【００１７】
図１〜図３に示したように構築される山形断面屋根架構の構築構法としては、先ず図４に示したように屋根構造材３の地組みを行うのであるが、その前提として、山形断面屋根架構の主たる荷重処理手段であるテンションリング１及びコンプレッションリング２の構築が行われる。
【００１８】
図１０に示したように、テンションリング１及びコンプレッションリング２はそれぞれ、地中の鉄筋コンクリート造（又は鉄骨鉄筋コンクリート造）基礎梁として構築し、その要所要所に屋根構造材を支持する柱脚７を地上にまで立ち上げた構成とされる。
【００１９】
図４は、図３のように構築される山形断面屋根架構の片側約半分について、ほぼ直線形状をなす屋根構造材３の特に斜辺部分を、地組みに適切な長さの複数部分３ａ、３ｂ、３ｃに区分し、各部分を繋ぐ節点にヒンジ５、６を設け、現場の地面レベルで、地面上に設置した構台（ベント）１０を使用するなどして、ほぼ水平方向に展開した形態に組み立てた段階を示している。
【００２０】
前記屋根構造材３における両斜辺部の下端はそれぞれ、図１０に構造詳細を示したように、現場の本設位置に予め上述した通りに設けた上記の柱脚７へピン４で回転可能に連結する。即ち、柱脚７の上面にヒンジブロック１１が固定され、屋根構造材３（３ａ）の下端に取り付けてあるヒンジ要素をピンボルト４で回転可能に連結している。
【００２１】
なお、屋根構造材３を、図４のように現場の地面レベルで略水平方向に展開した形に組み立てる段階、又はそれ以前の工程として、後で詳しく説明する通り、前記複数のヒンジ５、６のうち、立ち上げ時に外隅を形成する中間位置の第２ヒンジ５の外側端部に、図６又は図７に示すように、当該ヒンジ５が少なくとも１８０゜近傍にまで展開し、上述したように「急変現象」を生ずる際に相当な回転抵抗力を発揮して同「急変現象」を抑制する抵抗体を予め設けておく。
【００２２】
前記抵抗体としては、ダンパー方式、鉄板の折曲げ方式、バネ方式、摩擦スライド方式等々を種々採用して実施することもできるが、実施例としては実施が簡単で効果に優れる合成樹脂発泡体ブロック方式を示している。
【００２３】
図６の実施例では、前記の第２ヒンジ５で連結された屋根構造材３ａの外側端部に、ポリプロピレン等の合成樹脂発泡体ブロック１１を、他方の屋根構造材３ｂの外側端部には突き当たり板１２をそれぞれ固定して設けている（図１１Ａも参照）。特に、両者の関係は当該ヒンジ５が少なくとも１８０゜近傍（屋根構造材３がいわゆる直線状態になる）まで展開すると相互に突き当たり、合成樹脂発泡体ブロック１１の剛性なり圧縮強度の発現として上記「急変現象」を阻止するに相当な抵抗力を発生する配置に固定している（請求項４記載の発明）。
【００２４】
図７の実施例は、前記中間の第２ヒンジ５で連結された屋根構造材３ａ、３ｂそれぞれの外側端部に、合成樹脂発泡体ブロック１１、１１を固定して設けた構成を示している。この実施例の場合にも、双方の合成樹脂発泡体ブロック１１、１１の関係配置はやはり、当該ヒンジ５が少なくとも１８０゜近傍にまで展開すると相互に突き当たり、合成樹脂発泡体ブロック１１の剛性や圧縮強度の発現として上記「急変現象」を阻止するに相当な抵抗力を発生する配置にそれぞれ固定している。
【００２５】
前記の抵抗体が「急変現象」の阻止に寄与する作用効果は、図８に示したように、支点反力（この支点反力とは後記するように起立力を作用させる図３のＳ点における垂直方向の反力を指す。）が、全揚程において零以上の下向き力であることから明解である。よって、後記する屋根構造材３の起立作業は、プッシュアップ装置の押し上げ力の大きさの制御のみで安定に安全に行えるのである。
【００２６】
次に図５は、上記屋根構造材３における山形頂辺部８の直下位置の地面上にジャッキアップ装置１３を用意し、該装置で継ぎ足し方式でジャッキアップする支柱１４の上端を前記山形頂辺部８の下部に連結し、ジャッキアップ装置１３により起立力を加えて屋根構造材の立ち上げを行いつつある途中の段階を示している。最終的には図３に示したように、屋根構造材３は山形の斜辺部がほぼ直線状態となって起立姿勢が完成状態となり、終局する。前記の起立姿勢は、屋根構造材３における各ヒンジ５、６を固定化することによって構造的な安定状態とされる。具体的には図１１Ｂに符号１５で例示したように、屋根構造材３ａ、３ｂの外側部材を高張力ボルトで接合する方法などによって固定化が行われる。この段階で、前記合成樹脂発泡体ブロック１１及び突き当たり板１２等は邪魔物として撤去が行われる。
【００２７】
図１で明らかなように、山形断面屋根架構を構成する多数の屋根構造材３…は、外周側のテンションリング１及び内周側のコンプレッションリング２とピン連結して同テンションリング１及びコンプレッションリング２の長手方向に並立する配置とし、地面レベルで略水平方向に展開した形態に組み立て（地組み）が行われる。そして、前記山形頂辺部８の全周にわたり均等な起立力を加え、その水平レベルを保ちつつ屋根構造材３…の全体を合一に立ち上げる（請求項３記載の発明）。
【００２８】
従ってまた、図１で明らかなように、平面形状が正六角形状をなす屋根架構は、直線的な六辺に位置するもの同士は予め水平方向の横繋ぎ材を配置する結構を行い、版状のトラス構造に組み立てて立ち上げを行う。一方、六辺の角の部分については、立ち上げ作業に支障を来す部分の屋根構造材の地組みを除外し、立ち上げ後に後付けとして取付け作業を行うことになる。
【００２９】
次に、図１３に示した、請求項１記載の発明の実施形態を説明する。
【００３０】
この実施形態は、本発明の技術思想の範囲が上記の山形断面屋根架構の構築構法に限らないことを例証するものである。
【００３１】
即ち、この構築構法は、図１２Ｂのように所謂ドーム型に構築される無柱の大空間屋根架構が直線的な屋根構造材２３で構成され、各屋根構造材３はやはり地組みに適切な長さの複数部分に区分され、その各節点部をヒンジ２５、２６により連結した構造とされ、地面レベルで略水平方向に展開した形態に組み立てる段階を含む。
【００３２】
前記屋根構造材２３の一端部は、現地の外周側本設位置に設けたテンションリング２１の柱脚へ回転可能にピン２４で連結し、他端は内周側のテンションリング２２と連結している。前記複数のヒンジ２５、２６のうち、立ち上げ時に外隅を形成する中間位置の第２ヒンジ２５の外側端部には、やはり当該ヒンジ２５が少なくとも１８０゜近傍にまで展開すると相当な回転抵抗力を発揮する抵抗体を設けることは、上記の実施形態と全く同じである。
【００３３】
前記屋根構造材２３における内周側のテンションリング２２の部分に起立力を加えて屋根構造材全体の立ち上げを行うこと、及び起立姿勢の屋根構造材における各ヒンジは固定化することも同じである。
【００３４】
【本発明が奏する効果】
請求項１〜４に記載した発明に係る屋根架構の構築構法は、特に直線形状で複数の節点にヒンジを使用した屋根構造材による無柱の大空間屋根架構の構築における、いわゆる「急変現象」の危険性、弊害を未然に防いで、安全で効率の良い構築構法を提供する。
【図面の簡単な説明】
【図１】本発明に係る山形断面屋根架構の全体を立ち上げ形態として示した斜視図である。
【図２】山形断面屋根架構の構造物を完成状態で示した斜視図である。
【図３】図１のIII−III線矢視の断面図である。
【図４】山形断面屋根架構の地組み状態で示した立面図である。
【図５】山形断面屋根架構の立ち上げ途中の形態を示した立面図である。
【図６】屋根構造材の外隅を形成するヒンジ部分を示す正面図である。
【図７】屋根構造材の外隅を形成するヒンジ部分の異なる例を示した正面図である。
【図８】「急変現象」の改善効果を示すグラフである。
【図９】「急変現象」の発生を示すグラフである。
【図１０】屋根構造材と柱脚のピン連結構造を示す正面図である。
【図１１】Ａ、Ｂは屋根構造材の外隅を形成するヒンジ部分の展開前と、展開後の固定化構造を示した正面図である。
【図１２】Ａ、Ｂは本発明の異なる実施形態を地組み状態と立ち上げ状態で示した斜視図である。
【図１３】従来のドーム屋根の構築法を説明する図である。
【符号の説明】
３屋根構造材
５、６ヒンジ
１テンションリング
２コンプレッションリング
１１合成樹脂発泡体ブロック（抵抗体）
７柱脚[0001]
BACKGROUND OF THE INVENTION
This invention uses a compression ring at the center (inner periphery) and a tension ring at the outer periphery to form a straight roof structure material that constitutes a pillarless large space roof frame from the ground state. It belongs to the field of technology to be launched and built.
[0002]
[Prior art]
Conventionally, as a pillarless large space roof frame, a dome roof frame or a suspended roof frame of a cable net has been generally used.
[0003]
The present applicants can reduce the stress load of the roof material and the thrust force on the column base (horizontal force in the radial direction) to a fraction of those of the dome roof frame, and the cable net-like suspended roof Developed a mountain-shaped cross-section roof structure that is easier to construct on site than a frame, etc., including the earlier Japanese Patent Application No. 11-220900, Japanese Patent Application No. 11-272107, and Japanese Patent Application No. 11-220934 Propose to multiple applications.
[0004]
An embodiment of a chevron cross-section roof frame is illustrated in FIGS. The tension ring 1 is disposed on the outer peripheral edge, the compression ring 2 is disposed on the inner peripheral edge (center portion), and the two rings 1 and 2 are provided in a similar concentric arrangement when viewed in plan. Between the tension ring 1 and the compression ring 2, a roof frame is assembled in a chevron cross section as shown in FIG. Therefore, the structure has a donut shape.
[0005]
As shown in FIG. 1, the mountain-shaped cross-sectional roof frame has a roof structure material (truss structure material) 3 assembled in a mountain shape between the tension ring 1 and the compression ring 2 at a constant interval in the line direction of the ring. Fig. 2 shows the structure shown in Fig. 2 with multiple forests arranged in parallel and with a horizontal connecting material in the form of a ring in the horizontal direction, and a roof material (membrane material) stretched between the roof structure materials 3 ... Has been completed.
[0006]
By the way, as a construction method for a pillarless large space roof frame, a “dome construction method” described in Japanese Patent Publication No. 58-33341 is widely known. In this construction method, hinges are used at a plurality of nodes of the dome roof structure material, assembled in a state where it is horizontally expanded at the ground level, both ends of the roof structure material are joined to the periphery of the dome, and then the dome roof is constructed. It is characterized by the process of jacking up the structural material and starting it up, and adding and stiffening it when it is raised to a predetermined position.
[0007]
[Problems to be solved by the present invention]
In the case of the “dome construction method” described in Japanese Patent Publication No. 58-33341, the cross-sectional shape of the roof frame is an arch shape, and each roof structure material is basically curved in an arch shape. Therefore, as illustrated in FIG. 13, among the plurality of hinges a to c used for each node of the roof structure material, the second hinge b in the middle is the first hinge a and the third hinge as shown in FIG. It is considerably separated to the outside of the straight line PQ connecting c. Therefore, there is no concern that the expansion angle of the second hinge b approaches 180 ° or reverses beyond 180 ° during jackup.
[0008]
In other words, in the case of a dome roof, the roofing material load at the time of jacking up always acts only as an outward axial compression load, so the shape retention effect at the time of start-up is excellent, and the entire dome roof is static as the jacking progresses. Therefore, it is possible to proceed with a jack-up operation with high stability and safety.
[0009]
However, in the case of the above-described mountain-shaped cross-section roof frame, since the roof structural member 3 is basically linear, it is divided into a plurality of portions having a length suitable for the ground structure, and a plurality of hinges used at each node thereof. Among the four, five, and six, the intermediate second hinge 5 is very close to the straight line connecting the first hinge 4 and the third hinge 6 as shown in FIG. As a result, when the start-up operation (jack-up) of the roof structure material 3 proceeds to the final stage, the weight W of the roof structure material 3 accelerates the inward deployment of the second hinge 5 as shown in FIG. It acts as an acting force, and as a result, an acting force (natural force) that pushes up the mountain-shaped top 8 of the roofing material 3 is generated upward, and the roof frame rises beyond the start-up force (jack-up force). It was understood that there was a risk of losing control of the start-up work by causing a “sudden change phenomenon”.
[0010]
Incidentally, FIG. 9 shows the result of measuring the change in the magnitude of the support reaction force at the rising lift (or the remaining lift) at the time of start-up in relation to the lift. When the remaining lift is around 0.2 m, the magnitude of the support reaction force suddenly drops, and finally a “rapid change phenomenon” that becomes a negative load (tensile) clearly appears.
[0011]
Therefore, the object of the present invention is to prevent the risk and adverse effects of the above-mentioned “sudden change phenomenon” in the construction of a column-free large space roof frame, in particular, by a roof structure material having a linear shape and using hinges at a plurality of nodes. It is to provide a safe and efficient construction method improved and devised.
[0012]
[Means for Solving the Problems]
As a means for solving the above-mentioned problem, the construction method of the roof frame according to the invention described in claim 1 is:
A straight roof structure material that constitutes a pillarless large space roof frame is divided into multiple parts of appropriate length for the ground structure, and each node part is connected by hinges, and it is almost horizontal at the ground level. Assembling it into a form expanded in the direction;
One end portion of the roof structure material is rotatably connected to a column base of a tension ring provided at an outer peripheral side permanent position on the ground, and the other end is connected to an inner peripheral side tension ring, and among the hinges, Providing an outer end portion of the hinge that forms an outer corner at the time of start-up with a resistor that exhibits a substantial rotational resistance when the hinge is expanded to at least about 180 °;
A step of applying a standing force to the tension ring portion on the inner peripheral side of the roof structure material to start up the roof structure material, and fixing each hinge in the roof structure material in a standing posture. .
[0013]
The construction method of the mountain-shaped cross-section roof frame according to the invention of claim 2 is:
A straight roof structure material that constitutes a large space roof frame with a chevron cross section is divided into multiple parts of an appropriate length for the ground structure, and each node part is connected by hinges, and is substantially horizontal at the ground level. Assembling it into a form expanded in the direction;
The lower ends of both diagonal sides of the chevron in the roof structure material are rotatably connected to the respective column bases of the compression ring on the inner peripheral side and the tension ring on the outer peripheral side provided at the main installation position on the ground, and the hinge Among them, the outer end of the hinge that forms the outer corner at the time of start-up is provided with a resistor that exhibits a substantial rotational resistance when the hinge is expanded to at least about 180 °,
The roof structure material includes a step of raising the roof structure material by applying an erection force to the mountain-shaped top side portion of the roof structure material, and fixing each hinge in the standing roof structure material.
[0014]
The invention according to claim 3 is the construction method of the mountain-shaped cross-section roof frame according to claim 2,
Both lower ends of the roof structure material forming both oblique sides of the chevron cross section are rotatably connected to the column bases of the compression ring on the inner circumference side and the tension ring on the outer circumference side at the main installation position on the ground. Are connected to the top of the mountain by hinges, and most of the roof structure material juxtaposed in the longitudinal direction of the top of the mountain, the inner compression ring and the tension ring on the outer periphery is substantially horizontal at the ground level. It is assembled in the form developed in the above, and the whole roof structure material is raised together by applying a standing force to the top of the mountain shape.
[0015]
The invention described in claim 4 is the construction construction method of the roof frame according to any one of claims 1 to 3,
Among the hinges provided on the roof structure material, as a hinge resistor that forms an outer corner at the time of start-up, a synthetic resin foam block is attached to the outer end of the roof structure material connected by the hinge, It is characterized by being fixed in a relational arrangement that causes a resistance when it is expanded to at least 180 °.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, based on the drawings, first, embodiments of the invention described in claims 2 to 4 will be described.
[0017]
As the construction method of the mountain-shaped cross-section roof frame constructed as shown in FIG. 1 to FIG. 3, first the ground structure of the roof structure material 3 is performed as shown in FIG. Construction of the tension ring 1 and the compression ring 2 which are main load processing means of the roof frame is performed.
[0018]
As shown in FIG. 10, each of the tension ring 1 and the compression ring 2 is constructed as an underground reinforced concrete (or steel reinforced concrete) foundation beam, and column bases 7 that support the roof structure material are provided at necessary points. It is said to have been launched to the ground.
[0019]
FIG. 4 shows a plurality of portions 3a, 3b having a length suitable for the ground structure, particularly the hypotenuse portion of the roof structure material 3 having a substantially linear shape, about half of one side of the mountain-shaped cross-section roof frame constructed as shown in FIG. 3c, hinges 5 and 6 are provided at the nodes connecting the parts, and a gantry (vent) 10 installed on the ground is used at the ground level at the site, so that it is developed in a substantially horizontal direction. The assembled stage is shown.
[0020]
As shown in detail in FIG. 10, the lower ends of both oblique sides of the roof structural member 3 can be rotated by the pin 4 to the column base 7 provided in advance as described above at the actual site position. Link. That is, the hinge block 11 is fixed to the upper surface of the column base 7, and the hinge element attached to the lower end of the roof structural member 3 (3a) is rotatably connected by the pin bolt 4.
[0021]
As will be described in detail later, the roof structure material 3 is assembled in a form in which the roof structure material 3 is developed in a substantially horizontal direction at the ground level at the site as shown in FIG. 6 or 7 at the outer end of the second hinge 5 at the intermediate position that forms the outer corner when it is raised, as shown in FIG. In addition, a resistor is provided in advance that exhibits a substantial rotational resistance when the “sudden change phenomenon” occurs, and suppresses the “sudden change phenomenon”.
[0022]
The resistor may be implemented by variously adopting a damper method, a steel plate bending method, a spring method, a friction slide method, etc., but as an example, a synthetic resin foam block that is easy to implement and excellent in effect. The method is shown.
[0023]
In the embodiment of FIG. 6, a synthetic resin foam block 11 such as polypropylene is provided at the outer end of the roof structure material 3 a connected by the second hinge 5, and the other roof structure material 3 b is provided at the outer end of the roof structure material 3 b. The butting plates 12 are fixedly provided (see also FIG. 11A). In particular, when the hinge 5 is expanded to at least about 180 ° (the roof structural material 3 is in a so-called linear state), the two abut each other, and the above-mentioned “rapid change” is expressed as the rigidity of the synthetic resin foam block 11 and the expression of the compressive strength. It is fixed to an arrangement that generates a considerable resistance force to prevent the “phenomenon” (the invention according to claim 4).
[0024]
The embodiment of FIG. 7 shows a configuration in which synthetic resin foam blocks 11 and 11 are fixedly provided at outer end portions of the roof structural members 3a and 3b connected by the intermediate second hinge 5. . Also in this embodiment, the relational arrangement of both the synthetic resin foam blocks 11 and 11 will also abut against each other when the hinge 5 is expanded to at least 180 °, and the rigidity and compression of the synthetic resin foam block 11 As an expression of strength, each is fixed to an arrangement that generates a considerable resistance force to prevent the "rapid change phenomenon".
[0025]
As shown in FIG. 8, the effect that the resistor contributes to the prevention of the “sudden change phenomenon” is the fulcrum reaction force (this fulcrum reaction force is the S point in FIG. It is clear from the fact that it is a downward force of zero or more at the whole lift. Therefore, the standing work of the roof structural member 3 described later can be stably and safely performed only by controlling the magnitude of the push-up force of the push-up device.
[0026]
Next, FIG. 5 shows that the jackup device 13 is prepared on the ground just below the mountain-shaped top side portion 8 in the roof structural member 3 and the upper end of the column 14 jacked up by the addition method is connected to the mountain-shaped top side. It is connected to the lower part of the portion 8 and shows a stage in the middle of starting up the roof structural material by applying a rising force by the jack-up device 13. Finally, as shown in FIG. 3, the roof structure material 3 is finished with the standing posture in a completed state with the inclined portion of the mountain shape being almost linear. The standing posture is set to a structurally stable state by fixing the hinges 5 and 6 in the roof structure material 3. Specifically, as illustrated by reference numeral 15 in FIG. 11B, the fixing is performed by a method of joining the outer members of the roof structural members 3a and 3b with high tension bolts. At this stage, the synthetic resin foam block 11 and the abutting plate 12 are removed as obstacles.
[0027]
As is apparent from FIG. 1, a number of roof structural members 3 constituting the mountain-shaped cross-section roof frame are pin-connected to the outer periphery side tension ring 1 and the inner periphery side compression ring 2 and the tension ring 1 and compression ring. Assembling (grounding) is performed in such a manner that the two are arranged side by side in the longitudinal direction of 2 and developed in a substantially horizontal direction at the ground level. Then, a uniform standing force is applied over the entire circumference of the mountain-shaped top side 8 and the entire roof structure material 3 is raised together while maintaining the horizontal level (the invention according to claim 3).
[0028]
Accordingly, as is apparent from FIG. 1, the roof frame having a regular hexagonal plan shape is constructed by placing horizontal connecting members in advance on the six sides of the straight line. Assembled into a truss structure and launched. On the other hand, for the corners of the six sides, the ground structure of the roof structure material that interferes with the start-up work is excluded, and the attachment work is performed as a retrofit after the start-up.
[0029]
Next, an embodiment of the invention described in claim 1 shown in FIG. 13 will be described.
[0030]
This embodiment exemplifies that the scope of the technical idea of the present invention is not limited to the construction method of the mountain-shaped cross-section roof frame.
[0031]
That is, in this construction method, as shown in FIG. 12B, a pillar-free large space roof structure constructed in a so-called dome shape is constituted by a linear roof structure material 23, and each roof structure material 3 is also suitable for grounding. It is divided into a plurality of length parts, each of which is connected to each other by hinges 25 and 26, and includes a step of assembling in a form that is developed in a substantially horizontal direction at the ground level.
[0032]
One end of the roof structural member 23 is rotatably connected to a column base of a tension ring 21 provided at a local outer peripheral side installation position by a pin 24, and the other end is connected to a tension ring 22 on the inner peripheral side. Yes. Of the plurality of hinges 25 and 26, when the hinge 25 is expanded to at least about 180 ° at the outer end portion of the second hinge 25 at the intermediate position that forms the outer corner at the time of start-up, a considerable rotational resistance force is obtained. Providing a resistor that exhibits the same is exactly the same as in the above embodiment.
[0033]
It is also the same that the rising force is applied to the tension ring 22 portion on the inner peripheral side of the roof structure material 23 to start up the entire roof structure material, and each hinge in the standing roof structure material is fixed. is there.
[0034]
[Effects of the present invention]
The construction method of the roof frame according to the inventions described in claims 1 to 4 is a so-called “sudden change phenomenon” particularly in the construction of a pillarless large space roof frame by a roof structure material using a hinge at a plurality of nodes in a straight line shape. We will provide a safe and efficient construction method that prevents the dangers and harmful effects.
[Brief description of the drawings]
FIG. 1 is a perspective view showing an entire mountain-shaped cross-section roof frame according to the present invention as a rising configuration.
FIG. 2 is a perspective view showing a structure of a mountain-shaped cross-section roof frame in a completed state.
3 is a cross-sectional view taken along line III-III in FIG.
FIG. 4 is an elevational view showing a mountain-shaped cross-section roof frame in an assembled state.
FIG. 5 is an elevation view showing a form in the middle of starting up a mountain-shaped cross-section roof frame.
FIG. 6 is a front view showing a hinge portion forming an outer corner of the roof structure material.
FIG. 7 is a front view showing different examples of hinge portions that form the outer corners of the roof structure material.
FIG. 8 is a graph showing an improvement effect of “sudden change phenomenon”.
FIG. 9 is a graph showing the occurrence of a “sudden change phenomenon”.
FIG. 10 is a front view showing a pin connection structure between a roof structure material and a column base.
FIGS. 11A and 11B are front views showing a fixing structure before and after unfolding a hinge portion that forms an outer corner of a roof structure material. FIGS.
FIGS. 12A and 12B are perspective views showing different embodiments of the present invention in a grounded state and a raised state.
FIG. 13 is a diagram for explaining a conventional method for constructing a dome roof.
[Explanation of symbols]
3 Roof structural materials 5 and 6 Hinge 1 Tension ring 2 Compression ring 11 Synthetic resin foam block (resistor)
7 Column base

Claims

A straight roof structure material that constitutes a pillarless large space roof frame is divided into multiple parts of appropriate length for the ground structure, and each node part is connected by hinges, and it is almost horizontal at the ground level. Assembling it into a form expanded in the direction;
One end portion of the roof structure material is rotatably connected to a column base of a tension ring provided at an outer peripheral side permanent position on the ground, and the other end is connected to an inner peripheral side tension ring, and among the hinges, Providing an outer end portion of the hinge that forms an outer corner at the time of start-up with a resistor that exhibits a substantial rotational resistance when the hinge is expanded to at least about 180 °;
Applying a standing force to the tension ring portion on the inner circumference side of the roof structure material to start up the roof structure material, and fixing each hinge in the roof structure material in a standing posture;
A construction method of a roof frame characterized by comprising:

A straight roof structure material that constitutes a large space roof frame with a chevron cross section is divided into multiple parts of appropriate length for the ground structure, and each node part is connected by hinges, and is substantially horizontal at the ground level. Assembling it into a form expanded in the direction;
The lower ends of both diagonal sides of the chevron in the roof structure material are rotatably connected to the respective column bases of the compression ring on the inner peripheral side and the tension ring on the outer peripheral side provided at the main installation position on the ground, and the hinge Among them, the outer end of the hinge that forms the outer corner at the time of start-up is provided with a resistor that exhibits a substantial rotational resistance when the hinge is expanded to at least about 180 °,
Applying a standing force to the top of the mountain in the roof structure material to start up the roof structure material, and fixing each hinge in the roof structure material in a standing posture;
A construction method of a mountain-shaped cross-section roof structure characterized by comprising:

Both lower ends of the roof structure material forming both oblique sides of the chevron cross section are rotatably connected to the column bases of the compression ring on the inner circumference side and the tension ring on the outer circumference side at the main installation position on the ground. Are connected to the top of the mountain by hinges, and most of the roof structure material juxtaposed in the longitudinal direction of the top of the mountain, the inner compression ring and the tension ring on the outer periphery is substantially horizontal at the ground level. 3. The construction method of a mountain-shaped cross-section roof frame according to claim 2, wherein the roof structure material is assembled in a form developed in a vertical direction and a standing force is applied to the top of the mountain shape to start up the whole roof structure material.

Among the hinges provided on the roof structure material, as a hinge resistor that forms an outer corner at the time of start-up, a synthetic resin foam block is attached to the outer end of the roof structure material connected by the hinge, The construction method of a roof frame according to any one of claims 1 to 3, wherein the construction method is fixed in a relational arrangement that causes a resistance when it is developed to at least 180 °.