JP2019190073A - Construction method of structure - Google Patents

Construction method of structure Download PDF

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JP2019190073A
JP2019190073A JP2018081820A JP2018081820A JP2019190073A JP 2019190073 A JP2019190073 A JP 2019190073A JP 2018081820 A JP2018081820 A JP 2018081820A JP 2018081820 A JP2018081820 A JP 2018081820A JP 2019190073 A JP2019190073 A JP 2019190073A
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jack
constructed
floor slab
floor
constructing
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JP7169765B2 (en
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一樹 高橋
Kazuki Takahashi
一樹 高橋
治道 西谷
Harumichi Nishitani
治道 西谷
森田　敦
Atsushi Morita
敦 森田
加藤芳明
Yoshiaki Kato
芳明 加藤
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Taisei Corp
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Abstract

To provide a construction method of a structure capable of preventing torsion or distortion in a structure on a beam when constructing a structure on a girder.SOLUTION: A construction method of a structure is a construction method of a building 1 provided with a girder 12 on the third floor and an on-girder structure 22 constructed on the girder 12, and includes a step S1 for constructing the central part of the girder 12 in a state of being curved upward; a step S2 of installing the jack 50 on the girder 12 and constructing the on-girder structure 22 supported by the jack 50; a step S3 for constructing a third floor slab, and a step S4 for jacking up the beam structure 22 by applying a reaction force to the girder 12 and the floor slab on the third floor by a jack 50.SELECTED DRAWING: Figure 1

Description

本発明は、大梁およびこの大梁の上に構築される梁上構造体を備える構造物の構築方法に関する。   The present invention relates to a construction method for a structure including a large beam and a structure on the beam constructed on the large beam.

従来より、吹抜けを覆う大スパンの大梁の上に梁上構造体を構築する方法が提案されている（特許文献１参照）。
特許文献１には、吹き抜けを覆う大スパンの大梁を架設し、大梁上に立設される上部架構の柱と大梁との間にジャッキを設置し、柱をジャッキに支持させた状態で、大梁上に１層以上の架構の全体を構築して柱をジャッキアップする、あるいは架構の一部を構築する毎に柱をジャッキアップする作業を繰り返す、上部架構の構築方法が示されている。 Conventionally, a method for constructing an on-beam structure on a large-span girder covering a blow-through has been proposed (see Patent Document 1).
In Patent Document 1, a large beam with a large span that covers the atrium is installed, a jack is installed between the column of the upper frame that stands on the beam, and the beam is supported by the jack. There is shown a method for constructing an upper frame in which an entire frame having one or more layers is constructed and jacks are jacked up, or a work of jacking up columns is repeated every time a part of the frame is constructed.

特許文献２には、屋根を地組みした後、壁躯体を複数に分割して、分割した区画毎に壁躯体の上にジャッキを設けて、これらジャッキの上に屋根に取り付ける工程と、１つ置きのジャッキを駆動して屋根を上昇させ、作動させなかったジャッキの下方にさらに壁躯体を構築する工程と、を備える、大スパンの屋根架構を押し上げて構築する方法が示されている。   In Patent Document 2, after the roof is grounded, the wall case is divided into a plurality of sections, a jack is provided on the wall case for each of the divided sections, and one step is attached to the roof on these jacks. There is shown a method of pushing up and building a large span roof frame comprising the steps of driving a standing jack to raise the roof and building a further wall frame below the unactuated jack.

特許文献３には、下部躯体の上方に主要空間を置いて上向きに湾曲した大スパン大梁を架設し、この大スパン大梁により上部躯体を支持する施工方法が示されている。具体的には、大スパン大梁の柱位置から、下部躯体の上部柱位置にＰＣ鋼線を垂設するとともに、この上部柱位置に油圧ジャッキを設け、この油圧ジャッキによりＰＣ鋼線を緊張して大スパン大梁に下向きの鉛直荷重を与える。上部躯体の施工段階に応じて、油圧ジャッキによりその鉛直荷重の調整を行う。
また、この特許文献３では、大スパン大梁上に鉄骨柱および鉄骨梁からなる複数階の柱梁架構を建て込み、順次、上層階側に向かって柱梁架構を建て込んで、ジャッキアップを繰り返し行うことで、上部躯体を構築する。その際、上部躯体の床スラブを打設すると、床スラブの重量により大スパン大梁に鉛直荷重が作用する。よって、床スラブの床面積が大きくなる程、大きな鉛直荷重が大スパン大梁に作用する、という問題があった。 Patent Document 3 discloses a construction method in which a large-span large beam that is curved upward is placed with a main space above the lower frame, and the upper frame is supported by the large-span large beam. Specifically, a PC steel wire is suspended from the column position of the large span large beam to the upper column position of the lower frame, and a hydraulic jack is provided at the upper column position, and the PC steel wire is tensioned by this hydraulic jack. A downward vertical load is applied to the large span girder. The vertical load is adjusted by a hydraulic jack according to the construction stage of the upper frame.
Moreover, in this patent document 3, the multi-story column beam frame which consists of a steel column and a steel beam is built on a large span large beam, and a column beam frame is built sequentially toward the upper floor side, and jackup is repeated. By doing, build the upper housing. At that time, when the floor slab of the upper frame is driven, a vertical load is applied to the large span beam by the weight of the floor slab. Therefore, there is a problem that as the floor area of the floor slab increases, a large vertical load acts on the large span large beam.

特開２０００−１４４８９２号公報Japanese Patent Laid-Open No. 2000-144892 特開平３−１９７７３６号公報Japanese Patent Laid-Open No. 3-197736 特開平４−４４５６９号公報JP-A-4-44569

本発明は、大梁の上に梁上構造体を構築する際、この梁上構造体に捩れや変形が局所的に発生するのを防止できる構造物の構築方法を提供することを課題とする。   An object of the present invention is to provide a method for constructing a structure that can prevent local twisting and deformation of the on-beam structure when the on-beam structure is constructed on a large beam.

本発明者らは、大梁上に梁上構造体を構築する方法として、大梁単体ではなく、大梁に連続する床スラブを現場で打設して床スラブ付き大梁とし、その床スラブ付き大梁上にジャッキを設置し、このジャッキに支持させて複数階に亘って床スラブが打設された床スラブ付き柱梁架構を構築し、この床スラブ付き柱梁架構のジャッキアップを行うことで、梁上構造体に捩れや局所的な変形を発生させることなく、構造物を構築できることを見出した。
第１の発明の構造物の構築方法は、所定階（例えば、後述の３階）の大梁（例えば、後述の大梁１２）と、当該大梁の上に構築される梁上構造体（例えば、後述の梁上構造体２２）と、を備える構造物（例えば、後述の建物１）の構築方法であって、前記大梁の中央部を上方に湾曲させた状態で構築する工程（例えば、後述のステップＳ１）と、前記大梁の上にジャッキ（例えば、後述のジャッキ５０）を設置し、当該ジャッキに支持させて前記梁上構造体を構築する工程（例えば、後述のステップＳ２）と、前記所定階の床スラブを構築する工程（例えば、後述のステップＳ３）と、前記ジャッキにより前記所定階の大梁および床スラブに反力をとって前記梁上構造体をジャッキアップする工程（例えば、後述のステップＳ４）と、を含むことを特徴とする。 As a method of constructing a structure on a beam on the beam, the inventors of the present invention do not place the beam alone, but a floor slab continuous with the beam is cast on the site to form a beam with a floor slab, on the beam with the floor slab. By installing a jack, building a column slab with a floor slab in which floor slabs are placed across multiple floors supported by this jack, and jacking up this column slab with a floor slab, It was found that a structure can be constructed without causing twisting or local deformation of the structure.
The structure construction method according to the first aspect of the present invention includes a large beam (for example, a later-described large beam 12) on a predetermined floor (for example, the third floor described later) and an on-beam structure (for example, to be described later) constructed on the large beam. A structure (e.g., building 1 described later) including a step (e.g., a step described later) in which the central portion of the large beam is bent upward. S1), a step of installing a jack (for example, a jack 50 described later) on the large beam, and supporting the jack to construct the structure on the beam (for example, step S2 described later), and the predetermined floor A step of constructing a floor slab (for example, step S3 described later) and a step of jacking up the on-beam structure by applying a reaction force to the large beam and floor slab of the predetermined floor by the jack (for example, step described later) Including S4) And wherein the door.

この発明によれば、大梁の中央部を上方に湾曲させた状態で構築し、剛性を高めておく。さらに、この大梁にスラブを接合してスラブ付き大梁とし、さらに剛性を高める。この高剛性のスラブ付き大梁に反力をとって、ジャッキにより梁上構造体をジャッキアップしたので、大梁単体に反力をとってジャッキアップする場合に比べて、ジャッキの反力を大きく確保できる。よって、梁上構造体を構成する床スラブの床面積が大きくても、大梁上の梁上構造体に捩れや局所的な変形を生じさせることなく高精度で構築できる。
また、スラブ付き大梁に反力をとって梁上構造体をジャッキアップしたので、梁上構造体の荷重を大梁単体ではなく、床スラブ付きの大梁断面で負担させることができ、大梁自体の断面サイズを小さくできる。 According to this invention, it builds in the state which curved the center part of the big beam upwards, and rigidity is raised. Furthermore, a slab is joined to this girder to form a girder with a slab to further increase the rigidity. Since the reaction force is applied to this high-rigid slab-equipped beam and the structure on the beam is jacked up with a jack, the reaction force of the jack can be secured larger than when the reaction force is applied to the large beam alone. . Therefore, even if the floor area of the floor slab constituting the on-beam structure is large, it can be constructed with high accuracy without causing twisting or local deformation of the on-beam structure on the large beam.
In addition, since the structure on the beam is jacked up by applying a reaction force to the large beam with slab, the load on the structure on the beam can be borne by the cross section of the large beam with the floor slab instead of the single beam. The size can be reduced.

第２の発明の構造物の構築方法は、前記梁上構造体を構築する工程では、当該梁上構造体を構成する柱および梁を架設するとともに、当該梁上構造体を構成する複数階の床スラブも構築することを特徴とする。   In the construction method of the structure of the second invention, in the step of constructing the on-beam structure, the columns and beams constituting the on-beam structure are installed, and a plurality of floors constituting the on-beam structure are constructed. The floor slab is also constructed.

この発明によれば、梁上構造体を構成する柱および梁に加えて床スラブを構築し、この状態で、大梁上に設置したジャッキにより梁上構造体をジャッキアップしたので、梁上構造体の実際の荷重をジャッキに負担させることができる。
また、柱および梁だけでなく床スラブまで構築した梁上構造体をジャッキアップしたので、ジャッキアップ時に梁上構造体に捩れ等がほとんど生じることなく、高精度でジャッキアップを行うことができる。 According to the present invention, the floor slab is constructed in addition to the columns and beams constituting the on-beam structure, and in this state, the on-beam structure is jacked up by the jack installed on the large beam. The actual load can be borne by the jack.
In addition, since the on-beam structure constructed not only for the columns and beams but also the floor slab is jacked up, it is possible to jack up with high accuracy with almost no twisting or the like occurring in the on-beam structure during jackup.

第３の発明の構造物の構築方法は、前記ジャッキにより前記梁上構造体をジャッキアップする工程の後に、前記梁上構造体の上に新たな梁上構造体（例えば、後述の梁上構造体２２Ａ）を構築し、前記ジャッキにより、前記所定階の大梁および床スラブに反力をとって、当該ジャッキより上側の全ての梁上構造体をジャッキアップすることを繰り返す工程をさらに備えることを特徴とする。   According to a third aspect of the present invention, there is provided a structure construction method in which, after the step of jacking up the on-beam structure with the jack, a new on-beam structure (for example, an on-beam structure described later) is formed on the on-beam structure. Further comprising a step of constructing a body 22A), taking a reaction force against the large beam and floor slab of the predetermined floor with the jack, and jacking up all on-beam structures above the jack. Features.

この発明によれば、大梁上に構築した梁上構造体をジャッキアップした後、この梁上構造体の上に新たに梁上構造体を構築してジャッキアップすることで、大梁上の梁上構造体を高層化できる。   According to the present invention, after the on-beam structure constructed on the large beam is jacked up, a new on-beam structure is constructed and jacked up on the on-beam structure, thereby The structure can be raised.

本発明によれば、大梁の上に梁上構造体を構築する際、この梁上構造体に捩れや局所的な変形が生じるのを防止できる構造物の構築方法を提供できる。   ADVANTAGE OF THE INVENTION According to this invention, when building a structure on a beam on a large beam, the construction method of the structure which can prevent that a twist and local deformation | transformation arise in this structure on a beam can be provided.

本発明の第１実施形態に係る構造物の構築方法により構築される建物の縦断面図である。It is a longitudinal cross-sectional view of the building constructed | assembled by the construction method of the structure which concerns on 1st Embodiment of this invention. 図１に示す建物のＡ−Ａ平断面図である。It is an AA plane sectional view of the building shown in FIG. 本発明の構造物の構築方法の施工フローチャートである。It is a construction flowchart of the construction method of the structure of the present invention. 図１に示す建物において、破線Ｂで囲まれた大梁と梁上構造体との接合部分の部分拡大図である。In the building shown in FIG. 1, it is the elements on larger scale of the junction part of the large beam enclosed by the broken line B, and a structure on a beam. 実施例の各ステップにおけるＲ通りの４階梁を対象とする鉛直変位の実測値の推移図である。It is a transition figure of the measured value of the vertical displacement which makes R the 4th floor beam in each step of an example object. 本発明の第２実施形態に係る構造物の構築方法の施工フローチャートである。It is a construction flowchart of the construction method of the structure concerning a 2nd embodiment of the present invention.

本発明は、大梁単体ではなく、床スラブ付き大梁上に、順次、上層階側に向って複数階に亘って床スラブ付き柱梁架構を構築し、その床スラブ付き柱梁架構のジャッキアップを繰り返し行うことで、大梁上に構造物を構築する方法である。第１実施形態は、大梁上に５層を有する梁上構造体を構築する場合であり、第２実施形態は、大梁上に６層以上の階数を備えた梁上構造体を構築する場合である。
以下、本発明の実施形態を図面に基づいて説明する。なお、以下の実施形態の説明にあたって、同一構成要件については同一符号を付し、その説明を省略もしくは簡略化する。
〔第１実施形態〕
図１は、本発明の第１実施形態に係る構造物の構築方法により構築される鉄骨造の構造物としての建物１の縦断面図である。図２は、図１に示す建物１のＡ−Ａ平断面図である。
建物１の構造体は、７階建てであり、下部構造体１０と、下部構造体１０の上に設けられた上部構造体２０と、を備える。下部構造体１０は、基礎３０、柱３１、梁３２、図示しない床スラブを含んで構成される。上部構造体２０は、柱４１、梁４２、図示しない床スラブを含んで構成される。ここで、下部構造体１０および上部構造体２０を構成する各柱３１、４１は、矩形筒状の鋼管の内部にコンクリートが充填されたＣＦＴ柱である。 The present invention constructs a column beam frame with a floor slab on a large beam with a floor slab instead of a single beam, and sequentially builds up the column beam frame with a floor slab over a plurality of floors. It is a method of building a structure on a girder by repeatedly performing it. The first embodiment is a case of constructing an on-beam structure having five layers on a large beam, and the second embodiment is a case of constructing an on-beam structure having six or more floors on a large beam. is there.
Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following description of the embodiments, the same constituent elements are denoted by the same reference numerals, and the description thereof is omitted or simplified.
[First Embodiment]
FIG. 1 is a longitudinal sectional view of a building 1 as a steel structure constructed by the construction method according to the first embodiment of the present invention. FIG. 2 is an AA plane sectional view of the building 1 shown in FIG.
The structure of the building 1 has a seven-story structure and includes a lower structure 10 and an upper structure 20 provided on the lower structure 10. The lower structure 10 includes a foundation 30, a column 31, a beam 32, and a floor slab (not shown). The upper structure 20 includes a column 41, a beam 42, and a floor slab (not shown). Here, each of the columns 31 and 41 constituting the lower structure 10 and the upper structure 20 is a CFT column in which concrete is filled in a rectangular tubular steel pipe.

下部構造体１０は、複数層ここでは２層の下部一般構造体１１と、下部一般構造体１１の上端に支持されたトラス構造の大梁１２と、を備える。具体的には、大梁１２は、３階床レベルに設けられており、この大梁１２の直下は吹き抜けとなっている。
上部構造体２０は、下部一般構造体１１の上に架設された複数層ここでは５層の上部一般構造体２１と、大梁１２の上に構築された複数層ここでは５層の梁上構造体２２と、を備える。ここで、上部構造体２０の柱４１のうち梁上構造体２２に設けられたものを柱４１Ａとすると、梁上構造体２２は、これら柱４１Ａを介して大梁１２に支持されている。 The lower structure 10 includes a lower general structure 11 having a plurality of layers, here two layers, and a large beam 12 having a truss structure supported on the upper end of the lower general structure 11. Specifically, the girder 12 is provided on the third floor level, and the space just below the girder 12 is a colonnade.
The upper structure 20 includes a plurality of upper general structures 21 in this case, which are constructed on the lower general structure 11, and a plurality of layers, in this case, five layers on the beam, which are constructed on the large beam 12. 22. Here, of the columns 41 of the upper structure 20, if the column 41 </ b> A is provided on the beam upper structure 22, the beam upper structure 22 is supported by the large beam 12 via these columns 41 </ b> A.

以上の建物１を構築する手順について、図３に示す構造物の構築方法の施工フローチャートを参照しながら説明する。
ステップＳ１では、下部構造体１０の鉄骨建方を行う。具体的には、下部構造体１０の基礎３０を構築し、柱３１、梁３２、および大梁１２の鉄骨建方を行う。このとき、大梁１２の中央部を上方に湾曲させた状態つまりむくりを付けて構築する。
ステップＳ２では、上部構造体２０の鉄骨建方を行う。具体的には、大梁１２上にジャッキ５０を設置する。その後、上部構造体２０の柱４１および梁４２の鉄骨建方を行う。梁上構造体２２の鉄骨建方を行う際、梁上構造体２２の柱４１Ａをジャッキ５０に支持させる。このとき、ジャッキ５０は、平面視で、建物外周部のＰ通りの３本の柱４１Ａと、このＰ通りの１スパン内側のＱ通りの３本の柱４１Ａと、に一対ずつ設置される（図２参照）。 The procedure for constructing the building 1 will be described with reference to a construction flowchart of the construction method for the structure shown in FIG.
In step S1, the steel structure of the lower structure 10 is constructed. Specifically, the foundation 30 of the lower structure 10 is constructed, and the pillar 31, the beam 32, and the large beam 12 are erected. At this time, it is constructed with the central portion of the large beam 12 bent upward, that is, with a peeling.
In step S2, the steel structure of the upper structure 20 is constructed. Specifically, the jack 50 is installed on the large beam 12. Then, the steel frame construction of the column 41 and the beam 42 of the upper structure 20 is performed. When the steel structure of the on-beam structure 22 is constructed, the column 41 </ b> A of the on-beam structure 22 is supported by the jack 50. At this time, a pair of jacks 50 is installed in a plan view on three P columns 41A on the outer periphery of the building and on three Q columns 41A on the inner side of this P one span (see FIG. (See FIG. 2).

図４は、図１に示す建物１の破線Ｂで囲まれた大梁１２と梁上構造体２２との接合部分の部分拡大図である。
柱４１の下端部の互いに背中合わせの側面には、外側に向かって延びる一対のブラケット４３が形成されている。また、大梁１２の上面には、柱４１Ａの下端面に対向する位置に柱継手部３３が形成されるとともに、一対のブラケット４３に対向する位置に、一対の束柱３４が形成されている。一対のジャッキ５０は、束柱３４とブラケット４３との間に設置されている。
以上のように、一対のジャッキ５０は、柱４１Ａに偏心荷重が作用しないように、平面視で柱４１Ａの中心を挟んだ両側に設置されている。 FIG. 4 is a partial enlarged view of a joint portion between the large beam 12 and the on-beam structure 22 surrounded by the broken line B of the building 1 shown in FIG.
A pair of brackets 43 extending outward are formed on the back-to-back side surfaces of the lower ends of the columns 41. Further, on the upper surface of the large beam 12, a column joint portion 33 is formed at a position facing the lower end surface of the column 41 </ b> A, and a pair of bundle columns 34 is formed at a position facing the pair of brackets 43. The pair of jacks 50 is installed between the bundle pillar 34 and the bracket 43.
As described above, the pair of jacks 50 are installed on both sides of the center of the column 41A in plan view so that an eccentric load does not act on the column 41A.

ステップＳ３では、上部構造体２０の下層および下部構造体１０の最上層の床スラブを構築する。
具体的には、上部構造体２０の４階床スラブおよび５階床スラブを構築し、その後、下部構造体１０の３階床スラブを構築する。これにより、大梁１２に連続する床スラブ（３階床スラブ）が構築される。つまり、本実施形態では、上部構造体の下層を、上部構造体を構成する最下層とその直上階の２層とし、具体的には４階および５階と定義した。
ステップＳ４では、ジャッキ５０により、大梁１２および３階床スラブに反力をとって、上部構造体２０の梁上構造体２２をジャッキアップして、上方に移動させる（図４中白抜き矢印で示す）。このとき、ジャッキアップ作業は、Ｐ通りおよびＱ通りについて通り毎に行う。 In step S3, the floor slab of the lower layer of the upper structure 20 and the uppermost layer of the lower structure 10 is constructed.
Specifically, the fourth floor slab and the fifth floor slab of the upper structure 20 are constructed, and then the third floor slab of the lower structure 10 is constructed. As a result, a floor slab (three-story floor slab) continuous to the beam 12 is constructed. That is, in the present embodiment, the lower layer of the upper structure is defined as the lowermost layer constituting the upper structure and two layers immediately above it, specifically, the fourth floor and the fifth floor.
In step S4, a reaction force is applied to the large beam 12 and the third-floor slab by the jack 50, and the upper structure 22 of the upper structure 20 is jacked up and moved upward (as indicated by the white arrow in FIG. 4). Show). At this time, the jack-up operation is performed for each of P streets and Q streets.

ステップＳ５では、大梁１２と梁上構造体２２とを接合する。具体的には、梁上構造体２２をジャッキアップした後、柱継手部３３と柱４１Ａの下端面との間に、図示しない角形鋼管を挿入し、この角形鋼管の下端を柱継手部３３に溶接するとともに、角形鋼管の上端を柱４１Ａの下端に溶接する。その後、ジャッキ５０をジャッキダウンして、導入した荷重を解除する。
ステップＳ６では、上部構造体２０の残りの床スラブを構築する。具体的には、上部構造体２０の６階床スラブおよび７階床スラブを構築するとともに、屋上階の屋根を構築し、外壁を取り付ける。 In step S5, the large beam 12 and the on-beam structure 22 are joined. Specifically, after jacking up the on-beam structure 22, a rectangular steel pipe (not shown) is inserted between the column joint portion 33 and the lower end surface of the column 41 </ b> A, and the lower end of the square steel pipe is connected to the column joint portion 33. While welding, the upper end of the square steel pipe is welded to the lower end of the column 41A. Thereafter, the jack 50 is jacked down to release the introduced load.
In step S6, the remaining floor slab of the upper structure 20 is constructed. Specifically, the 6th floor slab and the 7th floor slab of the upper structure 20 are constructed, the roof of the rooftop floor is constructed, and the outer wall is attached.

〔実施例〕
以下、本発明の実施例について説明する。
実施例では、トラス梁のむくりを１０ｍｍとした。また、図１に示す上部構造体２０は、１節分の高さである。つまり、上部構造体２０は、鉄骨製作工場において、上部構造体２０の５層分の高さの鉄骨柱を製作し、建設現場にてその鉄骨柱を建て込んで、鉄骨梁を接合した鉄骨柱梁架構である。
また、Ｐ通りの柱については、１２００ｋＮまで導入できるロックナット付き油圧ジャッキを、１本の柱につき２台ずつ配置した。また、Ｑ通りの柱については、８００ｋＮまで導入できるロックナット付き油圧ジャッキを、１本の柱につき２台ずつ配置した。 〔Example〕
Examples of the present invention will be described below.
In the example, the peeling of the truss beam was 10 mm. Further, the upper structure 20 shown in FIG. 1 has a height of one node. That is, the upper structure 20 is a steel column in which a steel column having a height of five layers of the upper structure 20 is manufactured at a steel manufacturing factory, the steel column is built at a construction site, and the steel beam is joined. It is a beam frame.
In addition, for the P columns, two hydraulic jacks with lock nuts that can be introduced up to 1200 kN were arranged for each column. For Q columns, two hydraulic jacks with lock nuts that can be introduced up to 800 kN were arranged for each column.

実施例では、梁上構造体（４階梁）の鉛直変位が制御目標値に達するまで荷重を導入した。図５は、各ステップにおけるＲ通りの４階梁を対象とする鉛直変位の実測値の推移図である。
図５に示すように、最終的な梁上構造体の鉛直変位が、ジャッキにより荷重を導入しなかった場合の鉛直変位の約２５％〜５０％に収まるように、鉛直変位を制御した。つまり、最終的な梁上構造体の鉛直変位が、ジャッキにより荷重を導入しなかった場合の鉛直変位よりも約１０ｍｍ〜１５ｍｍ低減するように、鉛直変位を制御した。具体的には、Ｐ通りのＲ通りでは、建物使用時における鉛直変位が１５．５ｍｍ低減し、Ｑ通りのＲ通りでは、建物使用時における鉛直変位が１０．０ｍｍ低減した。 In the example, the load was introduced until the vertical displacement of the on-beam structure (fourth floor beam) reached the control target value. FIG. 5 is a transition diagram of measured values of the vertical displacement for the R four-story beam in each step.
As shown in FIG. 5, the vertical displacement was controlled so that the final vertical displacement of the on-beam structure was within about 25% to 50% of the vertical displacement when no load was introduced by the jack. In other words, the vertical displacement was controlled so that the final vertical displacement of the on-beam structure was reduced by about 10 mm to 15 mm from the vertical displacement when no load was introduced by the jack. Specifically, in the P street R street, the vertical displacement during use of the building was reduced by 15.5 mm, and in the Q street street R, the vertical displacement during use of the building was reduced by 10.0 mm.

本実施形態によれば、以下のような効果がある。
（１）大梁１２の中央部を上方に湾曲させた状態で構築し、剛性を高めておく。さらに、この大梁１２に３階床スラブを接合してスラブ付き大梁とし、さらに剛性を高める。この高剛性のスラブ付き大梁１２に反力をとって、ジャッキ５０により梁上構造体２２をジャッキアップしたので、大梁単体に反力をとってジャッキアップする場合に比べて、ジャッキ５０の反力を大きく確保できるから、大梁１２上の梁上構造体２２に捩れや局所的な変形を生じさせることなく高精度で構築できる。
また、スラブ付き大梁１２に反力をとって梁上構造体２２をジャッキアップしたので、梁上構造体２２の荷重を大梁１２だけでなく３階床スラブにも負担させることができ、大梁１２の断面サイズを小さくできる。 According to this embodiment, there are the following effects.
(1) It is constructed in a state where the central portion of the large beam 12 is bent upward, and the rigidity is increased. Furthermore, a 3rd floor slab is joined to the girder 12 to form a girder with a slab to further increase the rigidity. Since the reaction force is applied to the high-rigid slab-equipped beam 12 and the upper structure 22 is jacked up by the jack 50, the reaction force of the jack 50 is larger than that in the case where the reaction force is applied to the large beam alone. Therefore, it is possible to construct the on-beam structure 22 on the large beam 12 with high accuracy without causing twisting or local deformation.
Further, since the on-beam structure 22 is jacked up by applying a reaction force to the large beam 12 with the slab, the load on the on-beam structure 22 can be borne not only on the large beam 12 but also on the third floor slab. The cross-sectional size can be reduced.

（２）梁上構造体２２を構成する柱４１Ａおよび梁４２に加えて４階床スラブおよび５階床スラブを構築し、この状態で、大梁１２上に設置したジャッキ５０により梁上構造体２２をジャッキアップしたので、梁上構造体２２の実際の荷重をジャッキ５０に負担させることができる。
また、柱４１Ａおよび梁４２だけでなく床スラブまで構築した梁上構造体２２をジャッキアップしたので、ジャッキアップ時に梁上構造体２２に捩れ等がほとんど生じることなく、高精度でジャッキアップを行うことができる。 (2) In addition to the column 41A and the beam 42 constituting the beam upper structure 22, a fourth floor slab and a fifth floor slab are constructed, and in this state, the beam upper structure 22 is provided by the jack 50 installed on the large beam 12. Therefore, the jack 50 can be loaded with the actual load of the on-beam structure 22.
Further, since the on-beam structure 22 constructed not only for the column 41A and the beam 42 but also to the floor slab is jacked up, the to-be-structured structure 22 is hardly twisted at the time of jacking up and jacked up with high accuracy. be able to.

〔第２実施形態〕
本実施形態では、図１中破線で示すように、梁上構造体２２の上にさらに梁上構造体２２Ａが構築されている点が、第１実施形態と異なる。
よって、本実施形態では、梁上構造体２２をジャッキアップした後に、梁上構造体２２の上に新たな梁上構造体２２Ａを構築し、再度、梁上構造体２２、２２Ａをジャッキアップする。 [Second Embodiment]
This embodiment is different from the first embodiment in that an on-beam structure 22A is further constructed on the on-beam structure 22 as indicated by a broken line in FIG.
Therefore, in the present embodiment, after the on-beam structure 22 is jacked up, a new on-beam structure 22A is constructed on the on-beam structure 22, and the on-beam structures 22 and 22A are jacked up again. .

以下、本実施形態に係る建物１を構築する手順について、図６に示す構造物の構築方法の施工フローチャートを参照しながら説明する。
ステップＳ１Ａは、第１実施形態のステップＳ１と同様である。
ステップＳ２Ａでは、上部構造体２０の所定階分の鉄骨建方を行う。例えば、上部構造体２０を５層分、つまり、上部一般構造体２１および梁上構造体２２の鉄骨建方を行う。
ステップＳ３Ａ、Ｓ４Ａは、第１実施形態のステップＳ３、Ｓ４と同様である。
ステップＳ５Ａでは、上部構造体２０が完成したか否かを判定する。この判定がＹｅｓである場合、ステップＳ６Ａに移る。一方、この判定がＮｏである場合、ステップＳ２Ａに戻る。ステップＳ２Ａでは、さらに上部構造体２０の所定階分の鉄骨建方を行う。具体的には、残る梁上構造体２２Ａの鉄骨建方を行う。
ステップＳ６Ａ、Ｓ７Ａは、第１実施形態のステップＳ５、Ｓ６と同様である。 Hereinafter, the procedure for constructing the building 1 according to the present embodiment will be described with reference to the construction flowchart of the construction method for a structure shown in FIG.
Step S1A is the same as step S1 of the first embodiment.
In step S2A, the steel structure for a predetermined floor of the upper structure 20 is constructed. For example, the upper structure 20 is made up of five layers, that is, the upper general structure 21 and the on-beam structure 22 are erected.
Steps S3A and S4A are the same as steps S3 and S4 of the first embodiment.
In step S5A, it is determined whether or not the upper structure 20 is completed. If this determination is Yes, the process proceeds to step S6A. On the other hand, when this determination is No, the process returns to step S2A. In step S2A, a steel structure for a predetermined floor of the upper structure 20 is further constructed. Specifically, the remaining beam structure 22A is constructed.
Steps S6A and S7A are the same as steps S5 and S6 of the first embodiment.

このようにすれば、上述の（１）、（２）の効果に加えて、以下のような効果がある。
（３）大梁１２上に構築した梁上構造体２２をジャッキアップした後、この梁上構造体２２の上に新たに梁上構造体２２Ａを構築してジャッキアップすることで、大梁１２上の梁上構造体を高層化できる。 In this way, in addition to the effects (1) and (2) described above, the following effects can be obtained.
(3) After jacking up the on-beam structure 22 constructed on the large beam 12, a new on-beam structure 22A is constructed on the above-mentioned beam structure 22 and jacked up. The structure on the beam can be raised.

なお、本発明は前記実施形態に限定されるものではなく、本発明の目的を達成できる範囲での変形、改良等は本発明に含まれるものである。
例えば、上述の第１、第２実施形態では、ステップＳ３、Ｓ３Ａにおいて、上部構造体の下層として２層分の床スラブを構築したが、これに限らず、１層分の床スラブを構築してもよい。 It should be noted that the present invention is not limited to the above-described embodiment, and modifications, improvements, etc. within a scope that can achieve the object of the present invention are included in the present invention.
For example, in the first and second embodiments described above, in steps S3 and S3A, the floor slab for two layers is constructed as the lower layer of the upper structure. However, the present invention is not limited to this, and a floor slab for one layer is constructed. May be.

１…建物（構造物） １０…下部構造体 １１…下部一般構造体 １２…大梁
２０…上部構造体 ２１…上部一般構造体 ２２、２２Ａ…梁上構造体
３０…基礎 ３１…下部構造体の柱 ３２…下部構造体の梁
３３…柱継手部 ３４…束柱
４１…上部構造体の柱 ４１Ａ…梁上構造体の柱 ４２…上部構造体の梁
４３…ブラケット ５０…ジャッキ DESCRIPTION OF SYMBOLS 1 ... Building (structure) 10 ... Lower structure 11 ... Lower general structure 12 ... Large beam 20 ... Upper structure 21 ... Upper general structure 22, 22A ... Beam upper structure 30 ... Foundation 31 ... Column of lower structure 32 ... Beam of lower structure 33 ... Column joint 34 ... Bunch column 41 ... Column of upper structure 41A ... Column of upper structure 42 ... Beam of upper structure 43 ... Bracket 50 ... Jack

Claims (3)

所定階の大梁と、当該大梁の上に構築される梁上構造体と、を備える構造物の構築方法であって、
前記大梁の中央部を上方に湾曲させた状態で構築する工程と、
前記大梁の上にジャッキを設置し、当該ジャッキに支持させて前記梁上構造体を構築する工程と、
前記所定階の床スラブを構築する工程と、
前記ジャッキにより前記所定階の大梁および床スラブに反力をとって前記梁上構造体をジャッキアップする工程と、を含むことを特徴とする構造物の構築方法。 A method for constructing a structure comprising a large beam on a predetermined floor and an on-beam structure constructed on the large beam,
Constructing the central part of the large beam in a curved state upward;
Installing a jack on the large beam, and supporting the jack to construct the on-beam structure; and
Building a floor slab of the predetermined floor;
And a step of jacking up the structure on the beam by applying a reaction force to the large beam and floor slab of the predetermined floor by the jack. 前記梁上構造体を構築する工程では、当該梁上構造体を構成する柱および梁を架設するとともに、当該梁上構造体を構成する複数階の床スラブも構築することを特徴とする請求項１に記載の構造物の構築方法。   The step of constructing the above-mentioned beam structure includes constructing a pillar and a beam constituting the on-beam structure and constructing a floor slab of a plurality of floors constituting the on-beam structure. A construction method of the structure according to 1. 前記ジャッキにより前記梁上構造体をジャッキアップする工程の後に、前記梁上構造体の上に新たな梁上構造体を構築し、前記ジャッキにより、前記所定階の大梁および床スラブに反力をとって、当該ジャッキより上側の全ての梁上構造体をジャッキアップすることを繰り返す工程をさらに備えることを特徴とする請求項１または２に記載の構造物の構築方法。   After the step of jacking up the on-beam structure with the jack, a new on-beam structure is constructed on the on-beam structure, and the jack applies a reaction force to the large beam and floor slab of the predetermined floor. The method for constructing a structure according to claim 1, further comprising a step of repeating jacking up all the on-beam structures above the jack.
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Publication number Priority date Publication date Assignee Title
CN111005454A (en) * 2019-12-09 2020-04-14 中国电建集团河南工程有限公司 Flue gas purification room net rack block hoisting construction method

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JPH02136445A (en) * 1988-11-16 1990-05-25 Takenaka Komuten Co Ltd Construction of structure including superframe
JPH10159344A (en) * 1996-11-29 1998-06-16 Takenaka Komuten Co Ltd Building method of multi-layered structure provided with a plurality of super beam
JP2000144892A (en) * 1998-11-10 2000-05-26 Kajima Corp Construction method for upper frame of large span girder

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02136445A (en) * 1988-11-16 1990-05-25 Takenaka Komuten Co Ltd Construction of structure including superframe
JPH10159344A (en) * 1996-11-29 1998-06-16 Takenaka Komuten Co Ltd Building method of multi-layered structure provided with a plurality of super beam
JP2000144892A (en) * 1998-11-10 2000-05-26 Kajima Corp Construction method for upper frame of large span girder

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111005454A (en) * 2019-12-09 2020-04-14 中国电建集团河南工程有限公司 Flue gas purification room net rack block hoisting construction method

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