JP7061039B2 - How to build a roof structure - Google Patents

How to build a roof structure Download PDF

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JP7061039B2
JP7061039B2 JP2018130195A JP2018130195A JP7061039B2 JP 7061039 B2 JP7061039 B2 JP 7061039B2 JP 2018130195 A JP2018130195 A JP 2018130195A JP 2018130195 A JP2018130195 A JP 2018130195A JP 7061039 B2 JP7061039 B2 JP 7061039B2
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tension
roof
cantilever
tension force
tension rod
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真司 板谷
陽 内藤
幸弘 濱田
慶祐 中島
俊之 山本
慎 山崎
健次朗 北尾
裕一 小板橋
美和 水谷
篤史 西本
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Takenaka Corp
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Description

本発明は、片持ち屋根部の先端側部位と下方の反力受け部とに亘らせたテンションロッドに竣工時に必要な必要緊張力が付加されている屋根構造の構築方法に関する。 The present invention relates to a method for constructing a roof structure in which a necessary tension force required at the time of completion is applied to a tension rod extending over a portion on the tip end side of a cantilever roof portion and a lower reaction force receiving portion.

この種の屋根構造では、片持ち屋根部の先端側部位(軒先側部位)と下方の反力受け部とに亘らせたテンションロッドに、竣工時に必要な必要緊張力として、例えば、風圧力や地震力に対して緊張力が抜けきらない緊張力等が導入され、風圧力や地震力で有害な変形が生じないようにしている。このような屋根構造を構築する場合、例えば、以下のような手順で行うことが考えられる(この技術を示す適当な文献がない)。 In this type of roof structure, for example, wind pressure is applied to the tension rod extending between the tip side part (eave side part) of the cantilever roof part and the reaction force receiving part below, as the necessary tension force required at the time of completion. Introducing a tension force that does not completely remove the tension force against the seismic force, so that harmful deformation does not occur due to wind pressure or seismic force. When constructing such a roof structure, for example, the following procedure can be considered (there is no suitable document showing this technique).

まず、片持ち屋根部の先端側部位の高さ位置(軒先ライン)が設計高さ位置よりも上方に位置する上方むくれ姿勢に片持ち屋根部の躯体側部分を構築し、必要緊張力の一部をテンションロッドに導入して片持ち屋根部の先端側部位を僅かに下方に引き下げる。
その後、母屋受け、野地板、瓦等の仕上側部分の構築を順に行い、片持ち屋根部の自重の増加に伴って片持ち屋根部の先端側部位を徐々に下方に変位させながら片持ち屋根部を完成させる。仕上側部分を構築する各工事は、テンションロッドの緊張力や片持ち屋根部の先端側部位の変位量を検証しながら行う。
最後に、必要緊張力の残部をテンションロッドに追加して片持ち屋根部の先端側部位を引き下げ、テンションロッドに必要緊張力が作用した状態、且つ、片持ち屋根部の先端側部位が竣工時の目標高さ位置となった状態で工事を完了する。
First, the skeleton side part of the cantilever roof is constructed in an upwardly bulging posture where the height position (eaves line) of the tip side part of the cantilever roof is located above the design height position, and one of the required tension forces. Introduce the part to the tension rod and pull down the tip side part of the cantilever roof part slightly downward.
After that, the finishing parts such as the purlin holder, the field board, and the roof tiles were constructed in order, and as the weight of the cantilever roof increased, the tip side part of the cantilever roof was gradually displaced downward to the cantilever roof. Complete the part. Each work to construct the finished upper part is carried out while verifying the tension force of the tension rod and the displacement amount of the tip side part of the cantilever roof part.
Finally, the remaining part of the required tension is added to the tension rod to pull down the tip side part of the cantilever roof part, the necessary tension force is applied to the tension rod, and the tip side part of the cantilever roof part is completed. The construction is completed with the target height position of.

このような屋根構造の構築方法において、テンションロッドの緊張力や片持ち屋根部の先端側部位の変位量(片持ち屋根部の変形量)の検証回数を減らし、現場作業量の削減や工期の短縮を図ることが望まれている。 In such a roof structure construction method, the number of verifications of the tension force of the tension rod and the displacement amount (deformation amount of the cantilever roof part) of the tip side part of the cantilever roof part is reduced, the on-site work amount is reduced and the construction period is reduced. It is desired to shorten it.

本発明は、上述の如き実情に鑑みてなされたものであって、その主たる課題は、テンションロッドの緊張力や片持ち屋根部の変形量の検証回数を減らし、現場作業量の削減や工期の短縮を図ることができる屋根構造の構築方法を提供する点にある。 The present invention has been made in view of the above-mentioned actual situation, and its main problems are to reduce the number of verifications of the tension force of the tension rod and the deformation amount of the cantilever roof portion, and to reduce the on-site work amount and the construction period. The point is to provide a method for constructing a roof structure that can be shortened.

本発明の第1特徴構成は、片持ち屋根部の先端側部位と下方の反力受け部とに亘らせたテンションロッドに竣工時に必要な必要緊張力が導入されている屋根構造の構築方法であって、
前記片持ち屋根部の仕上側部分を構築する前に、前記テンションロッドに前記必要緊張力よりも大きいプレテンションを導入して前記片持ち屋根部の先端側部位を予め下方側に変位させ、その状態で前記仕上側部分を構築する点にある。
The first characteristic configuration of the present invention is a method for constructing a roof structure in which the necessary tension force required at the time of completion is introduced into a tension rod extending over a portion on the tip end side of a cantilever roof portion and a lower reaction force receiving portion. And
Before constructing the finished upper portion of the cantilever roof portion, a pretension larger than the required tension force is introduced into the tension rod to displace the tip end side portion of the cantilever roof portion downward in advance. The point is to construct the finishing part in the state.

本構成によれば、片持ち屋根部の仕上側部分を構築する前に、テンションロッドに必要緊張力よりも大きいプレテンションを導入して片持ち屋根部の先端側部位を予め下方側に変位させるので、その状態で仕上側部分を構築して片持ち屋根部の重量が増加しても、その重量増加分がプレテンションの範囲にある間は、テンションロッドに導入されている緊張力が抜けるだけとなる。よって、片持ち屋根部に作用する下向きの力(テンションロッドによる引き下げ力と自重による押し下げ力)の変化が抑制され、片持ち屋根部の先端側部位の高さ位置の変化も抑制される。したがって、仕上側部分を構築する工事中において、テンションロッドの緊張力や片持ち屋根部の変形量の検証回数を減らすことができ、現場作業量の削減や工期の短縮を図ることができる。 According to this configuration, before constructing the finishing portion of the cantilever roof portion, a pretension larger than the required tension force is introduced into the tension rod to displace the tip end side portion of the cantilever roof portion downward in advance. Therefore, even if the weight of the cantilever roof increases by constructing the finishing part in that state, the tension introduced in the tension rod will only be released while the weight increase is within the pretension range. It becomes. Therefore, the change of the downward force (pulling force by the tension rod and the pushing force by its own weight) acting on the cantilever roof portion is suppressed, and the change in the height position of the tip end side portion of the cantilever roof portion is also suppressed. Therefore, it is possible to reduce the number of verifications of the tension force of the tension rod and the deformation amount of the cantilever roof portion during the construction work for constructing the finished upper portion, and it is possible to reduce the on-site work amount and the construction period.

また、仕上側部分を構築する前にテンションロッドに導入するプレテンションが必要緊張力よりも大きいので、仕上側部分を構築した後から緊張力を追加する必要が生じても、その追加量を少なくすることができる。よって、仕上側部分を構築した後でテンションロッドに緊張力が追加されて片持ち屋根部が変形されることで、仕上側部分の施工品質が低下することも抑制することができる。
更に、仕上側部分の構築にあたり、母屋受け、野地板、瓦等の屋根材の重量が増加する部材を順番に取り付ける毎に、自重の変化に連れて片持ち屋根部の姿勢が順次に変化するのを抑制することができ、仕上側部分の施工性や施工品質を向上することができる。
Also, since the pretension introduced into the tension rod before constructing the finished upper part is larger than the required tension force, even if it becomes necessary to add tension force after constructing the finished upper part, the additional amount is small. can do. Therefore, it is possible to suppress deterioration of the construction quality of the finished upper portion due to the deformation of the cantilever roof portion due to the tension applied to the tension rod after the finished upper portion is constructed.
Furthermore, when constructing the finished upper part, the posture of the cantilever roof part changes sequentially as the weight changes each time the members such as purlin holders, field boards, and roof tiles that increase the weight of the roofing material are attached in order. It is possible to suppress the problem, and it is possible to improve the workability and construction quality of the finished upper part.

本発明の第2特徴構成は、前記プレテンションとして、前記必要緊張力に対して前記片持ち屋根部の仕上側部分の重量を加算した緊張力を前記テンションロッドに導入して前記片持ち屋根部の前記先端側部位を予め竣工時の目標高さ位置まで変位させる点にある。 In the second characteristic configuration of the present invention, as the pretension, a tension force obtained by adding the weight of the finishing portion of the cantilever roof portion to the required tension force is introduced into the tension rod to introduce the cantilever roof portion. The point is to displace the tip side portion of the above to the target height position at the time of completion in advance.

本構成によれば、プレテンションとして、必要緊張力に対して片持ち屋根部の仕上側部分の重量を加算した緊張力をテンションロッドに導入して片持ち屋根部の先端側部位を予め竣工時の目標高さ位置に変位させるので、その後、片持ち屋根部の仕上側部分を構築して片持ち屋根部の重量が増加しても、テンションロッドには必要緊張力が残ることになる。よって、片持ち屋根部の仕上側部分の構築開始から構築完了までの間、片持ち屋根部の自重の増加に連れてテンションロッドに導入されている緊張力が抜けるだけで、片持ち屋根部の先端側部位の高さ位置は、ほぼ竣工時の目標高さ位置に維持される。
したがって、片持ち屋根部の構築完了後に緊張力を殆ど調整する必要がなく、完成状態の片持ち屋根部が変形されることで片持ち屋根部の仕上げ等の品質が低下するのを一層抑制することができる。
According to this configuration, as a pre-tension, a tension force obtained by adding the weight of the finishing surface portion of the cantilever roof portion to the required tension force is introduced into the tension rod, and the tip side portion of the cantilever roof portion is completed in advance. Since it is displaced to the target height position of the above, even if the finishing portion of the cantilever roof portion is subsequently constructed and the weight of the cantilever roof portion is increased, the necessary tension force remains in the tension rod. Therefore, from the start of construction of the finished upper part of the cantilever roof to the completion of construction, the tension introduced in the tension rod is simply released as the weight of the cantilever roof increases, and the cantilever roof is constructed. The height position of the tip side part is maintained at the target height position at the time of completion.
Therefore, it is almost unnecessary to adjust the tension force after the construction of the cantilever roof is completed, and it is further suppressed that the quality of the finish of the cantilever roof is deteriorated due to the deformation of the cantilever roof in the completed state. be able to.

また、プレテンションを導入する際に片持ち屋根部の先端側部位の高さ位置を竣工時の目標高さ位置に調整すればよいので、例えば、プレテンションを導入する際に片持ち屋根部の先端側部位の高さ位置をプレテンション用の目標高さ位置に調整し、且つ、片持ち屋根部の構築完了後に片持ち屋根部の先端側部位の高さ位置を竣工時の目標高さ位置に調整するのに比べ、片持ち屋根部の先端側部位の変位量の調整作業の省力化を図ることができる。 Further, when the pretension is introduced, the height position of the tip side portion of the cantilever roof portion may be adjusted to the target height position at the time of completion. Therefore, for example, when the pretension is introduced, the cantilever roof portion is used. Adjust the height position of the tip side part to the target height position for pretension, and after the construction of the cantilever roof part is completed, set the height position of the tip side part of the cantilever roof part to the target height position at the time of completion. It is possible to save labor in adjusting the displacement amount of the tip side portion of the cantilever roof portion, as compared with the adjustment.

本発明の第3特徴構成は、前記片持ち屋根部の前記先端側部位の幅方向両端部を建物躯体部分に接続する前に前記テンションロッドに前記プレテンションを導入し、
その後、前記片持ち屋根部の前記先端側部位の幅方向両端部を前記建物躯体部分に接続した後に前記片持ち屋根部の前記仕上側部分を構築する点にある。
The third characteristic configuration of the present invention is to introduce the pretension into the tension rod before connecting both ends in the width direction of the tip end side portion of the cantilever roof portion to the building frame portion.
After that, both ends in the width direction of the tip end side portion of the cantilever roof portion are connected to the building skeleton portion, and then the finishing surface portion of the cantilever roof portion is constructed.

本構成によれば、プレテンションを導入して片持ち屋根部の先端側部位を変位させる際、片持ち屋根部の先端側部位の幅方向両端部が建物躯体部分に接続されていないので、建物躯体部分に片持ち屋根部の先端側部位の変位(片持ち屋根部の変形)が邪魔されることがなく、片持ち屋根部の先端側部位の高さ位置を精度良く調整することができる。 According to this configuration, when pretension is introduced to displace the tip side portion of the cantilever roof portion, both ends in the width direction of the tip end side portion of the cantilever roof portion are not connected to the building frame portion. The displacement of the tip side portion of the cantilever roof portion (deformation of the cantilever roof portion) is not obstructed by the skeleton portion, and the height position of the tip end side portion of the cantilever roof portion can be adjusted accurately.

屋根構造の構築方法の施工ステップを模式的に示す図The figure which shows the construction step of the construction method of the roof structure schematically. 屋根構造の構築方法の施工フローを示す図The figure which shows the construction flow of the construction method of the roof structure 屋根構造の構築方法の途中段階を示す斜視図Perspective view showing the middle stage of the roof structure construction method 導入治具及び下部定着具の設置部位を示す側面図Side view showing the installation site of the introduction jig and the lower fixing tool (a)導入治具及び下部定着具の設置部位の平面図、(b)下部定着具のベースプレートの平面図(A) Plan view of the installation site of the introduction jig and the lower fixing tool, (b) Plan view of the base plate of the lower fixing tool. 第1緊張力導入工程における導入治具及び下部定着具の設置部位を示す図The figure which shows the installation part of the introduction jig and the lower fixing tool in the 1st tension force introduction process. 第2緊張力導入工程における導入治具及び下部定着具の設置部位を示す図The figure which shows the installation part of the introduction jig and the lower fixing tool in the 2nd tension force introduction process. 屋根構造の別例を模式的に示す図A diagram schematically showing another example of the roof structure

本発明の屋根構造の構築方法の実施形態を図面に基づいて説明する。
この屋根構造の構築方法では、図1(d)に示すように、鉄骨製等の片持ち屋根部1の先端側部位(軒先側部位)1Aと下方のコンクリート製等の反力受け部2とに亘らせた鋼製等のテンションロッド3に竣工時に必要な第1緊張力t1(必要緊張力の一例)が導入された屋根構造を構築する。反力受け部2は、建物躯体部分としてのスラブや梁や基礎等から構成されているが、建物とは独立した構造体で構成されていてもよい。
An embodiment of the method for constructing a roof structure of the present invention will be described with reference to the drawings.
In this roof structure construction method, as shown in FIG. 1 (d), the tip side portion (eave side portion) 1A of the cantilever roof portion 1 made of steel or the like and the reaction force receiving portion 2 made of concrete or the like below are used. A roof structure is constructed in which a first tension force t1 (an example of the required tension force) required at the time of completion is introduced into the tension rod 3 made of steel or the like. The reaction force receiving portion 2 is composed of slabs, beams, foundations, etc. as the building frame portion, but may be composed of a structure independent of the building.

図1(d)に示す屋根構造では、片持ち屋根部1は、基端側部位(図中の右側部位)1Dが建物躯体部分としての柱4にて支持され、その基端側部位1Dから先端側に偏倚した中間部位が支柱5にて支持されることで、片持ち状態又は略片持ち状態で建物に備えられている。また、片持ち屋根部1は、基端側部位1Dだけでなく、図3に示すように、先端側部位1Aにおける幅方向両端部位1aも建物の柱4に接続されて柱4に支持されている。なお、図1に示す例では、片持ち屋根部1が、片流れ形式の屋根部となっているが、勿論、片流れ形式以外の屋根部であってもよい。 In the roof structure shown in FIG. 1 (d), in the cantilever roof portion 1, the proximal end side portion (right portion in the figure) 1D is supported by the pillar 4 as the building frame portion, and from the proximal end side portion 1D. An intermediate portion biased toward the tip side is supported by the support column 5, so that the building is provided in a cantilevered state or a substantially cantilevered state. Further, in the cantilever roof portion 1, not only the base end side portion 1D but also the widthwise both end portions 1a in the tip end side portion 1A are connected to the pillar 4 of the building and supported by the pillar 4. There is. In the example shown in FIG. 1, the cantilever roof portion 1 is a one-sided roof portion, but of course, it may be a roof portion other than the one-sided flow type.

図1に示すように、この屋根構造の構築方法は、片持ち屋根部1の躯体側部分を構築する屋根躯体側構築工程(図1(a)参照)を実行した後、プレテンションとして竣工時に必要な第1緊張力t1に対して片持ち屋根部1の仕上側部分の重量wsを加算した第2緊張力t2(=t1+ws)をテンションロッド3に導入して片持ち屋根部1の先端側部位1Aを予め竣工時の目標位置(LV3)まで変位させる緊張力導入工程(図1(b)~(c)参照)を実行する。その後、第2緊張力t2がテンションロッド3に導入された状態のまま、片持ち屋根部1の仕上側部分を構築する仕上側部分構築工程(図1(d)参照)を実行する。 As shown in FIG. 1, this roof structure construction method is performed as a pretension at the time of completion after executing the roof skeleton side construction step (see FIG. 1A) for constructing the skeleton side portion of the cantilever roof portion 1. A second tension force t2 (= t1 + ws), which is obtained by adding the weight ws of the upper surface portion of the cantilever roof portion 1 to the required first tension force t1, is introduced into the tension rod 3 to the tip side of the cantilever roof portion 1. A tension force introduction step (see FIGS. 1 (b) to 1 (c)) for displacing the portion 1A to the target position (LV3) at the time of completion in advance is executed. Then, while the second tension force t2 is introduced into the tension rod 3, the finishing part construction step (see FIG. 1D) for constructing the finishing part of the cantilever roof portion 1 is executed.

ここで、仕上側部分構築工程の進捗に伴って仕上側部分の重量wsが片持ち屋根部1に載荷されてきても、片持ち屋根部1の先端側部位1Aは竣工時の目標高さ位置(LV3)と同一又は略同一の位置に維持されながら、テンションロッド3の緊張力が抜けていくことになる。そのため、仕上側部分の構築が完了した時点で、テンションロッド3の緊張力を、竣工時に必要な第1緊張力t1(又はそれと略同一の緊張力)にすることができる。 Here, even if the weight ws of the finishing surface portion is loaded on the cantilever roof portion 1 with the progress of the finishing surface portion construction process, the tip side portion 1A of the cantilever roof portion 1 is at the target height position at the time of completion. The tension force of the tension rod 3 is released while being maintained at the same or substantially the same position as (LV3). Therefore, when the construction of the finished upper portion is completed, the tension force of the tension rod 3 can be set to the first tension force t1 (or substantially the same tension force) required at the time of completion.

なお、詳細は後述するが、本実施形態では、緊張力導入工程として、竣工時に必要な第1緊張力t1をテンションロッド3に導入する第1緊張力導入工程(図1(b)参照)と、その状態から緊張力を増加させて第2緊張力t2をテンションロッド3に導入する第2緊張力導入工程(図1(c)参照)を有している。 Although the details will be described later, in the present embodiment, as the tension force introduction step, the first tension force introduction step (see FIG. 1 (b)) in which the first tension force t1 required at the time of completion is introduced into the tension rod 3 It has a second tension force introduction step (see FIG. 1 (c)) in which the tension force is increased from that state and the second tension force t2 is introduced into the tension rod 3.

以下、図1、図2を参照して、本発明の屋根構造の構築方法の手順について詳細に説明する。
まず、躯体側構築工程(図1(a)参照)として、片持ち屋根部1の躯体側部分を柱4及び支柱5に支持させる状態に組み付けて片持ち屋根部1の躯体側部分を構築する(図2のステップ♯1)。片持ち屋根部1の躯体側部分としては、鉄骨製等の屋根大梁や屋根小梁等が該当する。このとき、片持ち屋根部1の先端側部位1Aは、第1高さ位置(LV1)に位置する。また、この時点では、図3に示すように、片持ち屋根部1の先端側部位1Aの高さ位置の調整を精度良く行えるように、片持ち屋根部1の先端側部位1Aにおける幅方向両端部位1aは構築せずに建物の柱4に接続しないようにする。
Hereinafter, the procedure of the method for constructing the roof structure of the present invention will be described in detail with reference to FIGS. 1 and 2.
First, as a skeleton side construction step (see FIG. 1A), the skeleton side portion of the cantilever roof portion 1 is assembled in a state of being supported by the pillars 4 and 5 to construct the skeleton side portion of the cantilever roof portion 1. (Step # 1 in FIG. 2). The skeleton side portion of the cantilever roof portion 1 corresponds to a roof girder made of steel or the like, a roof girder, or the like. At this time, the tip end side portion 1A of the cantilever roof portion 1 is located at the first height position (LV1). Further, at this point, as shown in FIG. 3, both ends in the width direction of the cantilever roof portion 1 at the tip side portion 1A so that the height position of the tip side portion 1A of the cantilever roof portion 1 can be adjusted accurately. The part 1a is not constructed and is not connected to the pillar 4 of the building.

片持ち屋根部1の躯体側部分を構築したら、片持ち屋根部1の先端側部位1Aと反力受け部2との間にテンションロッド3を亘らせ、第1緊張力導入工程(図1(b)参照)として、竣工時に必要な第1緊張力t1をテンションロッド3に導入して片持ち屋根部1の先端側部位1Aを下方に変位させる(図2のステップ♯2)。
そして、テンションロッド3に導入されている緊張力、及び、片持ち屋根部1の先端側部位1Aの変位量を計測し、それらの計測値が許容外(NG)であれば、許容内(OK)になるまで、第1緊張力導入工程に戻ってテンションロッド3の緊張力を再調整する(図2のステップ♯3のNGの場合、ステップ♯2)。このとき、片持ち屋根部1の先端側部位1Aは第1高さ位置(LV1)よりも下方の第2高さ位置(LV2)に位置する。
After constructing the skeleton side portion of the cantilever roof portion 1, the tension rod 3 is passed between the tip side portion 1A of the cantilever roof portion 1 and the reaction force receiving portion 2, and the first tension force introduction step (FIG. 1). As (b)), the first tension force t1 required at the time of completion is introduced into the tension rod 3 to displace the tip end side portion 1A of the cantilever roof portion 1 downward (step # 2 in FIG. 2).
Then, the tension force introduced into the tension rod 3 and the displacement amount of the tip side portion 1A of the cantilever roof portion 1 are measured, and if those measured values are unacceptable (NG), it is within the permissible range (OK). ), The tension force of the tension rod 3 is readjusted by returning to the first tension force introduction step (in the case of NG in step # 3 in FIG. 2, step # 2). At this time, the tip end side portion 1A of the cantilever roof portion 1 is located at the second height position (LV2) below the first height position (LV1).

テンションロッド3に導入されている緊張力、及び、片持ち屋根部1の先端側部位1Aの変位量が許容内(OK)になれば、テンションロッド3を打弦して当該緊張状態での周波数を計測し、その計測値を緊張力確認用周波数として記録する。記録された緊張力確認用周波数は、竣工時の緊張力の確認や竣工後の定期的な緊張力の確認等に用いられる。 If the tension force introduced into the tension rod 3 and the displacement amount of the tip side portion 1A of the cantilever roof portion 1 are within the allowable range (OK), the tension rod 3 is struck and the frequency in the tension state is reached. Is measured, and the measured value is recorded as the frequency for confirming the tension force. The recorded tension force confirmation frequency is used for confirmation of tension force at the time of completion and periodical confirmation of tension force after completion.

次いで、第2緊張力導入工程(図1(c)参照)として、竣工時に必要な第1緊張力t1に対して片持ち屋根部1の仕上側部分の重量wsを加算した第2緊張力t2(=t1+ws)をテンションロッド3に導入して片持ち屋根部1の先端側部位1Aを予め竣工時の目標高さ位置(LV3)まで変位させる(図2のステップ♯4)。 Next, as a second tension force introduction step (see FIG. 1 (c)), a second tension force t2 obtained by adding the weight ws of the finished upper portion of the cantilever roof portion 1 to the first tension force t1 required at the time of completion. (= T1 + ws) is introduced into the tension rod 3 to displace the tip end side portion 1A of the cantilever roof portion 1 to the target height position (LV3) at the time of completion in advance (step # 4 in FIG. 2).

そして、テンションロッド3に導入されている緊張力、及び、片持ち屋根部1の先端側部位1Aの変位量を計測し、それらの計測値が許容外(NG)であれば、許容内(OK)になるまで、第2緊張力導入工程に戻ってテンションロッド3の緊張力を再調整する(図2のステップ♯5のNGの場合、ステップ♯4)。 Then, the tension force introduced into the tension rod 3 and the displacement amount of the tip side portion 1A of the cantilever roof portion 1 are measured, and if those measured values are unacceptable (NG), it is within the permissible range (OK). ), The tension force of the tension rod 3 is readjusted by returning to the second tension force introduction step (in the case of NG in step # 5 in FIG. 2, step # 4).

テンションロッド3に導入されている緊張力、及び、片持ち屋根部1の先端側部位1Aの変位量が許容内(OK)になれば、この時点で、片持ち屋根部1の先端側部位1Aにおける幅方向両端部位1a(図3参照)は構築する。そして、仕上側構築工程(図2(d)参照)として、片持ち屋根部1の躯体側部分に片持ち屋根部1の仕上側部分を組み付け、片持ち屋根部1の仕上側部分を構築する(図2のステップ♯6)。片持ち屋根部1の仕上側部分は、片持ち屋根部1の躯体側部分に支持される部分であり、本実施形態では、鉄骨製等の母屋や野地板、瓦等の屋根材等が該当する。この仕上側部分構築工程の実行中において、片持ち屋根部1の先端側部位1Aは目標高さ位置(LV3)に維持されながら、テンションロッド3の緊張力が低下し、仕上側部分構築工程の完了時点でテンションロッド3の緊張力は第1緊張力t1になる。 If the tension force introduced into the tension rod 3 and the displacement amount of the tip side portion 1A of the cantilever roof portion 1 are within the allowable range (OK), at this point, the tip side portion 1A of the cantilever roof portion 1 1a at both ends in the width direction (see FIG. 3) is constructed. Then, as a finishing surface construction step (see FIG. 2D), the finishing surface portion of the cantilever roof portion 1 is assembled to the skeleton side portion of the cantilever roof portion 1 to construct the finishing surface portion of the cantilever roof portion 1. (Step # 6 in FIG. 2). The upper surface portion of the cantilever roof portion 1 is a portion supported by the skeleton side portion of the cantilever roof portion 1, and in the present embodiment, a main building made of steel frame, a field board, a roofing material such as a roof tile, etc. do. During the execution of this finishing surface partial construction step, the tension force of the tension rod 3 is reduced while the tip end side portion 1A of the cantilever roof portion 1 is maintained at the target height position (LV3), and the finishing surface portion construction step is performed. At the time of completion, the tension force of the tension rod 3 becomes the first tension force t1.

その後、テンションロッド3に導入されている緊張力、及び、片持ち屋根部1の先端側部位1Aの変位量を計測し、それらの計測値が許容外(NG)であれば、テンションロッド3の緊張力を再調整し(ステップ♯7のNGの場合、ステップ♯8)、許容内(OK)になれば、工事を完了する。 After that, the tension force introduced into the tension rod 3 and the displacement amount of the tip side portion 1A of the cantilever roof portion 1 are measured, and if those measured values are unacceptable (NG), the tension rod 3 The tension is readjusted (in the case of NG in step # 7, step # 8), and if it is within the allowable range (OK), the construction is completed.

次に、テンションロッド3に緊張力を導入してテンションロッド3の下部を反力受け部2に定着するまでの一連のテンションロッド施工手順について説明する。本実施形態では、テンションロッド3の下部を反力受け部2に定着するための下部定着具10(図4、図5等参照)、及び、汎用的なセンターホールジャッキ(油圧ジャッキの一例)30でテンションロッド3に緊張力を導入するための導入治具20(図4、図5等参照)を用いてテンションロッド3の施工を行う。以下、下部定着具10、導入治具20、テンションロッド施工手順の順に説明を加える。 Next, a series of tension rod construction procedures from introducing a tension force to the tension rod 3 to fixing the lower portion of the tension rod 3 to the reaction force receiving portion 2 will be described. In the present embodiment, a lower fixing tool 10 (see FIGS. 4, 5, etc.) for fixing the lower portion of the tension rod 3 to the reaction force receiving portion 2, and a general-purpose center hole jack (an example of a hydraulic jack) 30. The tension rod 3 is constructed using the introduction jig 20 (see FIGS. 4, 5, etc.) for introducing the tension force into the tension rod 3. Hereinafter, explanations will be added in the order of the lower fixing tool 10, the introduction jig 20, and the tension rod construction procedure.

<下部定着具>
図4、図5(b)に示すように、下部定着具10は、反力受け部2に固定可能な鋼製又は金属製のベースプレート11の上面の中央部位に、テンションロッド3の下部を引き抜き不能に受け止める鋼製又は金属製の筒状の受け部12を溶接等で固定して構成されている。
<Lower fixing tool>
As shown in FIGS. 4 and 5B, in the lower fixing tool 10, the lower portion of the tension rod 3 is pulled out from the central portion of the upper surface of the steel or metal base plate 11 that can be fixed to the reaction force receiving portion 2. It is configured by fixing a tubular receiving portion 12 made of steel or metal that cannot be received by welding or the like.

ベースプレート11の外周部位には、反力受け部2に埋め込まれた複数本(本例では4本)のアンカーボルト2Aの上部が上下方向に挿通可能な複数の挿通孔11Aが貫通形成されている。当該挿通孔11Aにアンカーボルト2Aの上部を挿通させた状態で、アンカーボルト2Aに螺合させた上ナット13、下ナット14にてベースプレート11を締め付けることで、ベースプレート11を反力受け部2に固定することができる。最終的には、ベースプレート11の下面と反力受け部2との間にグラウト等の充填材Jが充填される。 A plurality of insertion holes 11A through which the upper portions of a plurality of (four in this example) anchor bolts 2A embedded in the reaction force receiving portion 2 can be inserted in the vertical direction are formed through the outer peripheral portion of the base plate 11. .. With the upper part of the anchor bolt 2A inserted through the insertion hole 11A, the base plate 11 is tightened with the upper nut 13 and the lower nut 14 screwed into the anchor bolt 2A, so that the base plate 11 becomes the reaction force receiving portion 2. Can be fixed. Finally, a filler J such as grout is filled between the lower surface of the base plate 11 and the reaction force receiving portion 2.

ベースプレート11の挿通孔11Aの内径は、水平方向の位置調整代分だけアンカーボルト2Aの外径よりも大きく構成されている。また、上下のナット13,14とベースプレート11との間には、挿通孔11Aの内径よりも外形が大きく構成された座金13A,14Bが備えられている。よって、挿通孔11Aの内面とアンカーボルト2Aの外面との間の位置調整代を利用してアンカーボルト2Aに対するベースプレート11の位置を調整した上で、上下のナット13,14で締め付けることで、下部定着具10を水平方向の適切な位置で反力受け部2に定着させることができる。なお、ベースプレート11の挿通孔11Aどうしの間には、平面視略十字状の補強プレート11Bが設けられている。 The inner diameter of the insertion hole 11A of the base plate 11 is larger than the outer diameter of the anchor bolt 2A by the horizontal position adjustment allowance. Further, between the upper and lower nuts 13 and 14 and the base plate 11, washers 13A and 14B having an outer diameter larger than the inner diameter of the insertion hole 11A are provided. Therefore, after adjusting the position of the base plate 11 with respect to the anchor bolt 2A by using the position adjustment allowance between the inner surface of the insertion hole 11A and the outer surface of the anchor bolt 2A, the lower part is tightened with the upper and lower nuts 13 and 14. The fixing tool 10 can be fixed to the reaction force receiving portion 2 at an appropriate position in the horizontal direction. A reinforcing plate 11B having a substantially cross shape in a plan view is provided between the insertion holes 11A of the base plate 11.

筒状の受け部12は、その内周面の上部側に雌ネジが形成され、上部開口から内部に差し込まれたテンションロッド3の下部を引き抜き不能に受け止め自在に構成されている。
一方、テンションロッド3の下部には、外周面の下部側に雄ネジが形成された筒状のテンショナー15が外嵌状態で備えられている。また、テンションロッド3の下部には、テンショナー15の抜け落ちを接当阻止する球ナット16(抜け落ち阻止部の一例)が備えられている。テンションロッド3の下端から上方の所定範囲は、外周面に雄ネジを有する雄ネジ部3Aとして構成されており、この雄ネジ部3Aに球ナット16が螺合されている。
The tubular receiving portion 12 has a female screw formed on the upper side of the inner peripheral surface thereof, and is configured to be able to receive the lower portion of the tension rod 3 inserted into the inside from the upper opening so as not to be pulled out.
On the other hand, the lower part of the tension rod 3 is provided with a tubular tensioner 15 in which a male screw is formed on the lower side of the outer peripheral surface in an externally fitted state. Further, a ball nut 16 (an example of a fall-out prevention portion) for contacting and preventing the tensioner 15 from coming off is provided in the lower portion of the tension rod 3. A predetermined range above the lower end of the tension rod 3 is configured as a male screw portion 3A having a male screw on the outer peripheral surface, and a ball nut 16 is screwed into the male screw portion 3A.

そのため、球ナット16にて抜け落ちが阻止された状態のテンショナー15の外周面(雄ネジ)を下部定着具10の受け部12の内周面(雌ネジ)に螺合させて、テンショナー15を上下方向に螺進させることで、テンションロッド3の下部の取り付け位置を適切な位置に変更することができ、その状態で下部定着具10の受け部12にてテンションロッド3の下部を引き抜き不能に受け止めることができる。なお、テンショナー15の内周面とテンションロッド3の内周面との間には、球ナット16にてテンショナー15に掛け止められたテンションロッド3の若干の姿勢変更を許容する融通が設けられている。 Therefore, the outer peripheral surface (male screw) of the tensioner 15 in a state where the ball nut 16 is prevented from coming off is screwed into the inner peripheral surface (female screw) of the receiving portion 12 of the lower fixing tool 10, and the tensioner 15 is moved up and down. By screwing in the direction, the mounting position of the lower part of the tension rod 3 can be changed to an appropriate position, and in that state, the lower part of the tension rod 3 cannot be pulled out by the receiving portion 12 of the lower fixing tool 10. be able to. A flexibility is provided between the inner peripheral surface of the tensioner 15 and the inner peripheral surface of the tension rod 3 to allow a slight change in posture of the tension rod 3 hooked on the tensioner 15 by the ball nut 16. There is.

また、テンションロッド3の下部の雄ネジ部3Aにおけるテンショナー15よりも上方の部位には、ロックナット17が螺合されている。このロックナット17は、テンションロッド施工の最終段階で下方に移動させてテンショナー15の上面に押し付けることで、テンショナー15の弛みを阻止するのに用いられる。また、このロックナット17は、詳細は後述するが、テンションロッド3に緊張力を導入する際に、センターホールジャッキ30の力をテンションロッド3に作用させる作用点としても利用される。 Further, a lock nut 17 is screwed into a portion of the male screw portion 3A at the lower portion of the tension rod 3 above the tensioner 15. The locknut 17 is used to prevent the tensioner 15 from loosening by moving it downward and pressing it against the upper surface of the tensioner 15 at the final stage of tension rod construction. Further, although the details of the locknut 17 will be described later, the locknut 17 is also used as an action point for applying the force of the center hole jack 30 to the tension rod 3 when introducing the tension force to the tension rod 3.

<導入治具>
導入治具20は、鋼製又は金属製の基台21に、センターホールジャッキ30を載置状態で支持可能なジャッキ支持部22と、テンションロッド3を上下移動自在に挿通可能なロッド挿通孔23を一体的に形成して構成されている。ジャッキ支持部22は、基台21の左右両端部位に配置され、ロッド挿通孔23は基台21の左右中央部位に配置されている。ロッド挿通孔23は、基台21を上下方向に貫通している。
<Introduction jig>
The introduction jig 20 includes a jack support portion 22 capable of supporting the center hole jack 30 in a mounted state on a steel or metal base 21, and a rod insertion hole 23 capable of vertically movablely inserting the tension rod 3. Is integrally formed and configured. The jack support portions 22 are arranged at the left and right end portions of the base 21, and the rod insertion holes 23 are arranged at the left and right center portions of the base 21. The rod insertion hole 23 penetrates the base 21 in the vertical direction.

基台21は、平面視で扁平門型に構成された本体部材21Aと、本体部材21Aの凹部に嵌り込む装着部材21Bとに、ロッド挿通孔23を2分割する分割ラインに沿って分割構成されている。本体部材21Aの半割状のロッド挿通孔23にテンションロッド3を配置した状態で、装着部材21Bを本体部材21Aにボルト等の固定具24で固定することで、導入治具20をテンションロッド3にセットすることができる。 The base 21 is divided into a main body member 21A configured in a flat gate shape in a plan view and a mounting member 21B fitted into a recess of the main body member 21A along a dividing line for dividing the rod insertion hole 23 into two. ing. In a state where the tension rod 3 is arranged in the half-split rod insertion hole 23 of the main body member 21A, the mounting jig 20 is fixed to the main body member 21A with a fixing tool 24 such as a bolt, so that the introduction jig 20 is attached to the tension rod 3. Can be set to.

ジャッキ支持部22には、センターホールジャッキ30に装着されたテンションバー31を上下移動自在に挿通可能なテンションバー挿通孔22Aが設けられている。そのため、テンションバー挿通孔22Aにテンションバー31を挿通させる状態でジャッキ支持部22の上面にセンターホールジャッキ30を載置することができる。そして、センターホールジャッキ30にてテンションバー挿通孔22Aに挿通されたテンションバー31を上下方向に移動させるができる。なお、テンションバー31は、外周面に雄ネジが形成された長ボルトにて構成されている。 The jack support portion 22 is provided with a tension bar insertion hole 22A through which the tension bar 31 mounted on the center hole jack 30 can be inserted vertically. Therefore, the center hole jack 30 can be placed on the upper surface of the jack support portion 22 in a state where the tension bar 31 is inserted into the tension bar insertion hole 22A. Then, the tension bar 31 inserted through the tension bar insertion hole 22A can be moved in the vertical direction by the center hole jack 30. The tension bar 31 is composed of a long bolt having a male screw formed on the outer peripheral surface.

導入治具20をテンションロッド3にセットし、テンションバー31の下端をアンカーボルト2Aの余長部の上端に対して筒状のカプラー32にて引き抜き不能に接続するとともに、テンションロッド3の下部に螺合させているロックナット17を上方に移動させて導入治具20の基台21の下面(テンションバー挿通孔22Aの周縁部)に当接させことで、テンションロッド3に緊張力を導入可能な緊張力導入姿勢となる。 The introduction jig 20 is set on the tension rod 3, and the lower end of the tension bar 31 is connected to the upper end of the extra length portion of the anchor bolt 2A with a tubular coupler 32 so as not to be pulled out, and is connected to the lower part of the tension rod 3. Tension force can be introduced into the tension rod 3 by moving the screwed locknut 17 upward and bringing it into contact with the lower surface of the base 21 of the introduction jig 20 (the peripheral edge of the tension bar insertion hole 22A). It becomes a posture to introduce tension.

そして、この緊張力導入姿勢にてセンターホールジャッキ30を伸張側に作動させることで、テンションバー31に接続されたアンカーボルト2Aを反力支点にし、且つ、ロックナット17を作用点にして、テンションロッド3に引き下げ力を作用させてテンションロッド3に緊張力を導入することができる。なお、カプラー32は、上下開放された内部の全面に雌ネジが形成された鋼製又は金属製の筒状接続部材である。 Then, by operating the center hole jack 30 to the extension side in this tension force introduction posture, the anchor bolt 2A connected to the tension bar 31 is used as a reaction force fulcrum, and the locknut 17 is used as an action point to tension the tension. A pulling force can be applied to the rod 3 to introduce a tension force to the tension rod 3. The coupler 32 is a steel or metal tubular connecting member having a female screw formed on the entire surface of the inside which is open vertically.

<テンションロッド施工手順>
(第1緊張力導入工程)
まず、図6(a)に示すように、テンションロッド3の上部を片持ち屋根部1の先端側部位1Aの躯体側部分に吊り下げ、下部定着具10の水平方向での位置調整を行った後、下部定着具10を反力受け部2にセットする。また、センターホールジャッキ30及び導入治具20を前述した緊張力導入姿勢にセットする。
このとき、下部定着具10の水平方向での位置調整は、片持ち屋根部1の先端側部位1Aが基端側部位1Dを支点にして引き下げられることで鉛直方向だけでなく水平方向にも変位する影響を見込んで行う。また、下部定着具10の上ナット13は、ベースプレート11の上方移動を許容するように上方側に配置しておく。
<Tension rod construction procedure>
(1st tension introduction process)
First, as shown in FIG. 6A, the upper portion of the tension rod 3 was suspended from the skeleton side portion of the tip end side portion 1A of the cantilever roof portion 1, and the position of the lower fixing tool 10 was adjusted in the horizontal direction. After that, the lower fixing tool 10 is set in the reaction force receiving portion 2. Further, the center hole jack 30 and the introduction jig 20 are set in the above-mentioned tension force introduction posture.
At this time, in the horizontal position adjustment of the lower fixing tool 10, the tip end side portion 1A of the cantilever roof portion 1 is pulled down with the proximal end side portion 1D as a fulcrum, so that the position is displaced not only in the vertical direction but also in the horizontal direction. Do this in anticipation of the impact. Further, the upper nut 13 of the lower fixing tool 10 is arranged on the upper side so as to allow the base plate 11 to move upward.

図6(b)に示すように、センターホールジャッキ30を作動させ、アンカーボルト2Aを反力支点にし、且つ、ロックナット17を作用点にしてテンションロッド3を引き下げてテンションロッド3に第1緊張力t1を導入する。第1緊張力t1が導入されたら、図6(c)に示すように、テンショナー15の外周面(雄ネジ)を、下部定着具10の受け部12の内周面(雌ネジ)に螺合させて下方に螺進させることで、ベースプレート11を上方に引き上げてベースプレート11の上面を上ナット13の下面に当て付け、ロックナット17に作用していた荷重をベースプレート11に受け替える。 As shown in FIG. 6B, the center hole jack 30 is operated, the anchor bolt 2A is used as a reaction force fulcrum, and the locknut 17 is used as an action point to pull down the tension rod 3 to make the tension rod 3 first tension. Introduce force t1. After the first tension force t1 is introduced, as shown in FIG. 6C, the outer peripheral surface (male screw) of the tensioner 15 is screwed into the inner peripheral surface (female screw) of the receiving portion 12 of the lower fixing tool 10. By pulling the base plate 11 upward and applying the upper surface of the base plate 11 to the lower surface of the upper nut 13, the load acting on the locknut 17 is received by the base plate 11.

そして、図示は省略するが、導入治具20及びセンターホールジャッキ30を一時的に取り外し、テンションロッド3の緊張力の確認や片持ち屋根部1の先端側部位1Aの変位量の確認を行う。テンションロッド3の緊張力は、センターホールジャッキ30の計測部の値やひずみゲージの値、打弦による周波数から求めた換算値等に基づいて確認する。テンションロッド3に第1緊張力t1が導入されていることが確認されたら、その際の打弦による周波数を緊張力確認用周波数として記録する。 Then, although not shown, the introduction jig 20 and the center hole jack 30 are temporarily removed, and the tension force of the tension rod 3 is confirmed and the displacement amount of the tip side portion 1A of the cantilever roof portion 1 is confirmed. The tension force of the tension rod 3 is confirmed based on the value of the measurement unit of the center hole jack 30, the value of the strain gauge, the converted value obtained from the frequency obtained by striking the strings, and the like. When it is confirmed that the first tension force t1 is introduced into the tension rod 3, the frequency due to the string striking at that time is recorded as the tension force confirmation frequency.

(第2緊張力導入工程)
図7(a)に示すように、導入治具20及びセンターホールジャッキ30を取り外し前の状態に戻し、再びセンターホールジャッキ30を作動させて、ベースプレート11に作用していた荷重をロックナット17に受け替える。そして、アンカーボルト2Aを反力支点にし、且つ、ロックナット17を作用点にしてベースプレート11と共にテンションロッド3を引き下げてテンションロッド3に第2緊張力t2を導入する。
(Second tension introduction process)
As shown in FIG. 7A, the introduction jig 20 and the center hole jack 30 are returned to the state before removal, the center hole jack 30 is operated again, and the load acting on the base plate 11 is applied to the locknut 17. Replace. Then, the tension rod 3 is pulled down together with the base plate 11 with the anchor bolt 2A as the reaction force fulcrum and the locknut 17 as the action point to introduce the second tension force t2 to the tension rod 3.

第2緊張力t2が導入されたら、図7(b)に示すように、下部定着具10の上ナット13を下方に移動させてベースプレート11を固定し、ロックナット17に作用していた荷重をベースプレート11に受け替える。 When the second tension force t2 is introduced, as shown in FIG. 7B, the upper nut 13 of the lower fixing tool 10 is moved downward to fix the base plate 11, and the load acting on the locknut 17 is applied. Replace with base plate 11.

そして、図7(c)に示すように、導入治具20及びセンターホールジャッキ30(図7(b)参照)を取り外す。その後、テンションロッド3の緊張力の確認や片持ち屋根部1の先端側部位1Aの変位量の確認を行い、テンションロッド3に第2緊張力t2が導入されていることが確認されたら、ロックナット17を下方に移動させてテンショナー15の弛み止めを行う。また、上下のナット13,14の座金13A,14Aを溶接等により固定し、ベースプレート11の下面と反力受け部2の上面との間にグラウト等の充填材Jを充填する。更に、上ナット13の更に上にロックナット18を取り付け、上ナット13の弛み止めを行う。
このようにして、第2緊張力t2が導入された状態でテンションロッド3の下部を反力受け部2に定着する。
Then, as shown in FIG. 7 (c), the introduction jig 20 and the center hole jack 30 (see FIG. 7 (b)) are removed. After that, the tension force of the tension rod 3 is confirmed, the displacement amount of the tip side portion 1A of the cantilever roof portion 1 is confirmed, and when it is confirmed that the second tension force t2 is introduced into the tension rod 3, the lock is locked. The nut 17 is moved downward to prevent the tensioner 15 from loosening. Further, the washers 13A and 14A of the upper and lower nuts 13 and 14 are fixed by welding or the like, and a filler J such as grout is filled between the lower surface of the base plate 11 and the upper surface of the reaction force receiving portion 2. Further, a lock nut 18 is attached above the upper nut 13 to prevent the upper nut 13 from loosening.
In this way, the lower portion of the tension rod 3 is fixed to the reaction force receiving portion 2 in a state where the second tension force t2 is introduced.

なお、竣工時の緊張力の確認や竣工後の定期的な緊張力の確認等において、テンションロッド3の緊張力が許容外であった場合には、再度、導入治具20及びセンターホールジャッキ30を緊張力導入姿勢でセットし、事後的にテンションロッド3の緊張力を許容内に調整することができる。 If the tension of the tension rod 3 is unacceptable in the confirmation of the tension at the time of completion or the periodic confirmation of the tension after completion, the introduction jig 20 and the center hole jack 30 are again used. Can be set in the tension force introduction posture, and the tension force of the tension rod 3 can be adjusted within the allowable range after the fact.

〔別実施形態〕
(1)前述の実施形態では、図1(d)に示すように、本発明の屋根構造の構築方法で構築する屋根構造として、柱4と支柱5で片持ち状又は略片持ち状に支持された片流れ形式の片持ち屋根部1を有する屋根構造を例に示したが、例えば、図8(a)、(b)に示すように、片流れ形式以外の片持ち屋根部1を有する屋根構造であってもよい。また、図1(d)、図8(a)、(b)のいずれの場合でも、柱4だけで片持ち状又は略片持ち状に支持されていてもよい。
[Another Embodiment]
(1) In the above-described embodiment, as shown in FIG. 1 (d), as the roof structure to be constructed by the method for constructing the roof structure of the present invention, the pillars 4 and 5 are supported in a cantilevered or substantially cantilevered manner. Although the roof structure having the cantilever roof portion 1 of the one-sided flow type is shown as an example, for example, as shown in FIGS. 8A and 8B, the roof structure having the cantilevered roof part 1 other than the one-sided flow type is shown. May be. Further, in any of the cases of FIGS. 1 (d), 8 (a), and (b), the pillar 4 alone may be supported in a cantilever shape or a substantially cantilever shape.

(2)前述の実施形態では、緊張力導入工程として、竣工時に必要な第1緊張力t1をテンションロッド3に導入する第1緊張力導入工程(図1(b)参照)と、その状態から緊張力を増加させて第2緊張力t2をテンションロッド3に導入する第2緊張力導入工程(図1(c)参照)を有する場合を例に示したが、緊張力導入工程として、第1緊張力導入工程を省いて最初から第2緊張力t2をテンションロッド3に導入するようにしてもよい。 (2) In the above-described embodiment, as the tension force introduction step, the first tension force introduction step (see FIG. 1 (b)) in which the first tension force t1 required at the time of completion is introduced into the tension rod 3 and the state thereof. An example is shown in which a case having a second tension force introduction step (see FIG. 1 (c)) in which the tension force is increased and the second tension force t2 is introduced into the tension rod 3 is shown. The second tension force t2 may be introduced into the tension rod 3 from the beginning by omitting the tension force introduction step.

(3)前述の実施形態では、緊張力導入工程においてテンションロッド3に導入するプレテンションが、竣工時に必要な第1緊張力t1に対して片持ち屋根部1の仕上側部分の重量wsを加算した第2緊張力t2(=t1+ws)である場合を例に示したが、少なくとも竣工時に必要な第1緊張力t1よりも大きければよい。 (3) In the above-described embodiment, the pretension introduced into the tension rod 3 in the tension force introduction step adds the weight ws of the finishing surface portion of the cantilever roof portion 1 to the first tension force t1 required at the time of completion. The case where the second tension force t2 (= t1 + ws) is obtained is shown as an example, but it may be at least larger than the first tension force t1 required at the time of completion.

(4)下部定着具10や導入治具20の具体的構成、テンションロッド3の具体的な施工手順については、前述の実施形態で示した内容に限らず、テンションロッド3の設置環境等に応じて適宜に変更することができる。 (4) The specific configuration of the lower fixing tool 10 and the introduction jig 20, and the specific construction procedure of the tension rod 3 are not limited to the contents shown in the above-described embodiment, but depend on the installation environment of the tension rod 3 and the like. Can be changed as appropriate.

(5)前述の実施形態では、片持ち屋根部1の仕上側部分が、母屋や野地板、瓦等の屋根材等から構成されている場合を例に示したが、勿論、それらの一部であってもよく、少なくとも片持ち屋根部1の躯体側部分に支持される部分であればよい。 (5) In the above-described embodiment, the case where the upper surface portion of the cantilever roof portion 1 is composed of a roofing material such as a purlin, a field board, and a roof tile is shown as an example, but of course, a part thereof. It may be at least a portion supported by the skeleton side portion of the cantilever roof portion 1.

1 片持ち屋根部
1A 先端側部位
1a 幅方向両端部位
2 反力受け部
3 テンションロッド
4 柱(建物躯体部分)
t1 第1緊張力(必要緊張力)
t2 第2緊張力(プレテンション)
ws 片持ち屋根部の仕上側部分の重量
LV3 竣工時の目標高さ位置
1 Cantilever roof part 1A Tip side part 1a Width direction both ends part 2 Reaction force receiving part 3 Tension rod 4 Pillar (building frame part)
t1 1st tension (necessary tension)
t2 Second tension (pre-tension)
ws Weight of the upper part of the cantilever roof LV3 Target height position at the time of completion

Claims (3)

片持ち屋根部の先端側部位と下方の反力受け部とに亘らせたテンションロッドに竣工時に必要な必要緊張力が導入されている屋根構造の構築方法であって、
前記片持ち屋根部の仕上側部分を構築する前に、前記テンションロッドに前記必要緊張力よりも大きいプレテンションを導入して前記片持ち屋根部の前記先端側部位を予め下方側に変位させ、その状態で前記仕上側部分を構築する屋根構造の構築方法。
It is a method of constructing a roof structure in which the necessary tension force required at the time of completion is introduced into the tension rod extending over the tip side part of the cantilever roof part and the reaction force receiving part below.
Before constructing the finished upper portion of the cantilever roof portion, a pretension larger than the required tension force is introduced into the tension rod to displace the tip end side portion of the cantilever roof portion downward in advance. A method for constructing a roof structure for constructing the finishing portion in that state.
前記プレテンションとして、前記必要緊張力に対して前記片持ち屋根部の仕上側部分の重量を加算した緊張力を前記テンションロッドに導入して前記片持ち屋根部の前記先端側部位を予め竣工時の目標高さ位置まで変位させる請求項1記載の屋根構造の構築方法。 As the pretension, a tension force obtained by adding the weight of the upper surface portion of the cantilever roof portion to the required tension force is introduced into the tension rod to preliminarily complete the tip end side portion of the cantilever roof portion. The method for constructing a roof structure according to claim 1, wherein the roof structure is displaced to a target height position. 前記片持ち屋根部の前記先端側部位の幅方向両端部位を建物躯体部分に接続する前に前記テンションロッドに前記プレテンションを導入し、
その後、前記片持ち屋根部の前記先端側部位の幅方向両端部を前記建物躯体部分に接続した後に前記片持ち屋根部の前記仕上側部分を構築する請求項2記載の屋根構造の構築方法。
The pretension is introduced into the tension rod before connecting both end portions of the cantilever roof portion in the width direction to the building frame portion.
The method for constructing a roof structure according to claim 2, wherein the finished roof portion of the cantilever roof portion is constructed after connecting both ends in the width direction of the tip end side portion of the cantilever roof portion to the building frame portion.
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JP3338798B2 (en) * 1999-07-16 2002-10-28 アルインコ株式会社 Roofing equipment such as outdoor temporary viewing equipment
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