JP2018003510A - Floor construction method - Google Patents
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- JP2018003510A JP2018003510A JP2016134241A JP2016134241A JP2018003510A JP 2018003510 A JP2018003510 A JP 2018003510A JP 2016134241 A JP2016134241 A JP 2016134241A JP 2016134241 A JP2016134241 A JP 2016134241A JP 2018003510 A JP2018003510 A JP 2018003510A
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Abstract
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この発明は、地上の作業場で組み立てられた床版ユニットを建造物の床施工階へ吊り上げて各階の床を施工するための床施工方法に関し、この発明は特に、地上で組み立てられた床版ユニットを仮置き場に仮置くのに実施される方法に関する。 The present invention relates to a floor construction method for constructing a floor of each floor by lifting a floor slab unit assembled at a ground workplace to a floor construction floor of a building, and the present invention particularly relates to a floor slab unit assembled on the ground. The present invention relates to a method implemented to temporarily place a container in a temporary storage area.
従来、鉄骨造の建築物の床を施工するのに、施工すべき建築物の骨組みが完成した後、所定の枚数を梱包した鉄筋トラス付きデッキプレート(以下、「鉄筋トラス付きデッキプレート」または単に「デッキプレート」という。)の複数個を床施工階までクレーンで吊り上げて仮置きし、床の施工位置に敷き込んだ後、作業者が現場でデッキプレートの上に乗ってデッキプレートの端部等を1枚、1枚梁に溶接している。しかし、この種の作業は、「労働安全衛生法」に定められた「高所作業」となるため、作業者の墜落、転落災害を防止するための諸施設やデッキプレートや作業工具などの飛来、落下を防止するための安全設備をスラブ下方の全域に設置する必要がある(特許文献1の従来の技術の欄および特許文献2の発明が解決しようとする課題の欄参照)。 Conventionally, in order to construct a floor of a steel structure building, after the framework of the building to be constructed is completed, a deck plate with a reinforcing bar truss (hereinafter referred to as a “deck plate with a reinforcing bar truss”) or simply packed A number of "deck plates") are temporarily lifted up to the floor construction floor with a crane and temporarily placed on the floor construction position. Etc. are welded to a single beam. However, since this type of work is “work at high places” as defined in the “Labor Safety and Health Law”, various facilities, deck plates, work tools, etc. have been introduced to prevent workers from falling and falling. Therefore, it is necessary to install safety equipment for preventing the fall in the entire area below the slab (see the column of the prior art in Patent Document 1 and the column of problems to be solved by the invention of Patent Document 2).
上記した問題に鑑み、地上において、複数枚のデッキプレートを連ねたものに複数本の小梁を力骨として固着させた構造物(以下、「デッキプレート構造物」という。)を組み立て、これに玉掛けワイヤーの下端部を引っ掛けて吊り上げ、仮置き場へ運んで他の床版ユニット上に積み重ねられて仮置かれた後、床施工階の建て方が完了したとき、最上位置のデッキプレート構造物に前記の玉掛けワイヤーの下端部を引っ掛けて吊り上げ、建造物の床施工階へ運び上げるという工法が提案された(特許文献1、2参照)。 In view of the above-mentioned problems, a structure (hereinafter referred to as “deck plate structure”) in which a plurality of small beams are fixed as a skeleton to a structure in which a plurality of deck plates are connected on the ground is assembled. After hooking the lower end of the sling wire and lifting it, carrying it to a temporary storage area, stacking it on another floor slab unit and temporarily placing it, when the construction of the floor construction floor is completed, the deck plate structure at the top position is There has been proposed a construction method in which the lower end portion of the sling wire is hooked and lifted and carried to the floor construction floor of the building (see Patent Documents 1 and 2).
この種のデッキプレート構造物やこの発明の実施に用いられる床版ユニット(以下、単に「床版ユニット」という。)を製作するのに用いられるデッキプレートとして、図12に示す構造のものがあり、金属製の基板10上に長さ方向に所定の間隔で配設された複数の吊り材12の頂部の下面に鉄筋トラス11の上端筋13が溶接により固着されることにより鉄筋トラス11が吊持されている。なお、図中、14は上端筋と平行な下端筋、15は上端筋13と下端筋14との間に設けられるラチス筋である。 As a deck plate used for manufacturing this type of deck plate structure or a floor slab unit (hereinafter simply referred to as “floor slab unit”) used in the practice of the present invention, there is a structure shown in FIG. The upper bar 13 of the reinforcing bar truss 11 is fixed by welding to the lower surface of the top of the plurality of hanging members 12 arranged at predetermined intervals in the lengthwise direction on the metal substrate 10, whereby the reinforcing bar truss 11 is hung. It is held. In the figure, reference numeral 14 denotes a lower end line parallel to the upper end line, and 15 denotes a lattice line provided between the upper end line 13 and the lower end line 14.
上記した構成のデッキプレート1においては、前記吊り材12は、鉄線を伸長したり折り曲げたりするなどして加工されており、これがため、特に曲げ加工部分等に赤錆が発生し易い。吊り材12の頂部は、上段の床版ユニットの基板10の下面に当接するので、吊り材12の頂部に赤錆が発生していると、溶融亜鉛メッキ鋼板よりなる基板10の下面に赤錆が付着し、見栄えを著しく低下させるばかりでなく、赤錆が基板10の表層の溶融亜鉛メッキ層を損なって母材の発錆を引き起こすおそれがある。また、鉄筋トラス11を構成する上端筋13や下端筋14に赤錆が発生していることが多く、上端筋13が上段の床版ユニットの基板10の下面に接したとき、基板10の下面に赤錆が付着し、同様に見栄えを著しく低下させる。
さらに、基板10は亜鉛メッキ鋼板であって薄く、床版ユニットが多段に積み上げられると、各段の床版ユニットにはその段より上段の床版ユニットの荷重が掛かるため、その荷重によって基板10の下面にその下段の床版ユニットの吊り材10が押し付けられて基板10が変形するおそれがある。
In the deck plate 1 having the above-described configuration, the suspension member 12 is processed by elongating or bending an iron wire. For this reason, red rust is likely to occur particularly in a bent portion. Since the top of the suspension material 12 contacts the lower surface of the substrate 10 of the upper floor slab unit, if red rust is generated on the top of the suspension material 12, the red rust adheres to the lower surface of the substrate 10 made of hot dip galvanized steel sheet. In addition, the appearance may be significantly reduced, and red rust may damage the hot-dip galvanized layer on the surface of the substrate 10 and cause rusting of the base material. Further, red rust is often generated in the upper bar 13 and the lower bar 14 constituting the reinforcing bar truss 11, and when the upper bar 13 contacts the lower surface of the substrate 10 of the upper floor slab unit, Red rust adheres, and the appearance is significantly reduced as well.
Furthermore, the substrate 10 is a galvanized steel sheet and is thin. When the floor slab units are stacked in multiple stages, the floor slab unit at each stage is subjected to the load of the floor slab unit above that stage. There is a possibility that the substrate 10 is deformed by the suspension material 10 of the lower floor slab unit being pressed against the lower surface of the substrate.
この発明は、上記の問題に着目してなされたもので、床版ユニットを複数段に積み重ねて仮置きするとき、床版ユニットの基板の下面にその下段の床版ユニットの構成部材に発生した赤錆が付着して見栄えを損ねたり、基板がその下段の床版ユニットの構成部材より押圧を受けて変形したりすることがない床施工方法を提供することを目的とする。 The present invention has been made paying attention to the above-mentioned problem. When the floor slab unit is stacked and temporarily placed in a plurality of stages, the floor slab unit is generated on a lower surface of the substrate of the floor slab unit in a constituent member of the lower floor slab unit. It is an object of the present invention to provide a floor construction method in which red rust is not adhered and the appearance is not impaired, and the substrate is not deformed by being pressed by the constituent members of the lower floor slab unit.
この発明による床施工方法は、複数の鉄筋トラス付きデッキプレートを地上の作業場に搬入して建造物の床施工階の相対する梁間のスペースに対応する大きさおよび形状の床版ユニットを組み立てる工程と、前工程で組み立てられた床版ユニットを仮置き場へ搬送して仮置く工程と、前工程で仮置かれた床版ユニットを吊り上げて建造物の床施工階へ搬送して各階の床を施工する工程とを含むものであり、前記仮置き場に仮置かれる床版ユニットは複数段に積み重ねられて仮置かれ、仮置きに際して、前記床版ユニットはその下段の床版ユニットの鉄筋トラスの鉄筋上に各鉄筋トラスと直交する方向にほぼ全幅にわたって並行して置かれる複数本の合成樹脂製のパイプを中間に介在させて積み重ねられる。 The floor construction method according to the present invention includes the steps of assembling a floor slab unit having a size and shape corresponding to a space between opposing beams of a floor construction floor of a building by carrying a plurality of deck plates with reinforcing bars to the ground workplace. The floor slab unit assembled in the previous process is transported to the temporary storage site and temporarily placed, and the floor slab unit temporarily placed in the previous process is lifted and transported to the floor construction floor of the building to construct the floor on each floor The floor slab unit temporarily placed in the temporary storage place is stacked and temporarily placed in a plurality of stages, and at the time of temporary placement, the floor slab unit is a reinforcing bar of a reinforcing bar truss of the floor slab unit in the lower stage. A plurality of synthetic resin pipes placed in parallel across almost the entire width in a direction perpendicular to the reinforcing bar trusses are stacked on the top.
上記した床施工方法において、仮置き場に積み重ねられて仮置かれる床版ユニットは、その下段の床版ユニットの鉄筋トラスの鉄筋上に各鉄筋トラスと直交する方向にほぼ全幅にわたって平行して置かれる複数本の合成樹脂製のパイプを中間に介在させて積み重ねられるので、積み重ねられる床版ユニットの基板は、その下段の床版ユニットの鉄筋トラスの構成部材と直接接触しない。このため、仮に、下段の床版ユニットの構成部材に赤錆が発生していても、積み重ねられる床版ユニットの基板の下面に赤錆が付着することがない。また、基板の下面に下段の床版ユニットの構成部材が押し付けられることがなく、基板が変形するおそれもない。 In the floor construction method described above, the floor slab unit that is stacked and temporarily placed in the temporary storage place is placed on the reinforcing bar truss reinforcement of the lower floor slab unit in parallel in the direction orthogonal to each reinforcing bar truss. Since the plurality of synthetic resin pipes are stacked with the intermediate interposed therebetween, the substrates of the floor slab unit to be stacked do not directly contact the structural members of the reinforcing bar truss of the lower floor slab unit. For this reason, even if red rust is generated in the constituent members of the lower floor slab unit, the red rust does not adhere to the lower surface of the substrate of the floor slab unit to be stacked. Further, the constituent members of the lower floor slab unit are not pressed against the lower surface of the substrate, and there is no possibility that the substrate is deformed.
この発明の一実施態様においては、前記鉄筋トラス付きデッキプレートは、基板上に所定の間隔で配設された複数の吊り材の頂部の下面に鉄筋トラスの鉄筋が溶接により固着されることにより鉄筋トラスが吊持されたものであり、前記の各パイプは上面が前記吊り材の上方へ突出するように形状が定められている。 In one embodiment of the present invention, the deck plate with a reinforcing bar truss is formed by fixing the reinforcing bar of the reinforcing bar truss to the lower surface of the top of a plurality of suspension members arranged at predetermined intervals on the substrate by welding. A truss is suspended, and the shape of each of the pipes is determined so that the upper surface protrudes above the suspension member.
この実施態様においては、各パイプの上面が吊り材の上方へ突出するので、パイプ上に載せられた鉄筋トラス付きデッキプレートの基板の裏面はその下段の鉄筋トラス付きデッキプレートの吊り材に接触することがなく、基板の裏面に吊り材に発生した赤錆が付着したり、吊り材の押圧により基板が変形したりすることがない。 In this embodiment, since the upper surface of each pipe protrudes upward from the suspension material, the back surface of the substrate of the deck plate with reinforcing bar truss placed on the pipe is in contact with the hanging material of the deck plate with reinforcing bar truss on the lower stage. No red rust generated in the suspension material is attached to the back surface of the substrate, and the substrate is not deformed by the pressing of the suspension material.
この発明の上記した構成において、前記パイプは安価で軽量な塩化ビニル製のパイプを用いることが望ましいが、必ずしもこれに限られるものではない。 In the above-described configuration of the present invention, it is desirable to use an inexpensive and lightweight vinyl chloride pipe, but the present invention is not necessarily limited to this.
また、好ましい実施態様においては、前記パイプは径方向の断面形状が円形のものが用いられる。 In a preferred embodiment, the pipe has a circular cross section in the radial direction.
上記の実施態様においては、鉄筋トラスの鉄筋上でパイプが転動するので、パイプを移動するのが容易であり、決められた位置にパイプを容易に位置決めできる。 In the above embodiment, since the pipe rolls on the reinforcing bar of the reinforcing bar truss, it is easy to move the pipe, and the pipe can be easily positioned at a predetermined position.
この発明によれば、複数の床版ユニットを複数段に積み重ねて仮置きするとき、床版ユニットの基板の下面にその下段の床版ユニットの構成部材に発生した赤錆が付着して見栄えを損ねたり、基板が上段の床版ユニットの構成部材に押圧されて変形したりするおそれがないばかりか、赤錆が基板の表層の溶融亜鉛メッキ層を損なって母材の発錆を招くおそれもない。 According to the present invention, when a plurality of floor slab units are stacked and temporarily placed in a plurality of stages, red rust generated in the constituent members of the floor slab unit on the lower floor adheres to the lower surface of the substrate of the floor slab unit and the appearance is impaired. In addition, there is no possibility that the substrate is pressed and deformed by the constituent members of the upper floor slab unit, and there is no possibility that the red rust damages the hot-dip galvanized layer on the surface layer of the substrate and causes rusting of the base material.
図1は、この発明の一実施例である床施工方法の流れを示している。この床施工方法は、地上の作業場に複数のデッキプレートを搬入して床版ユニットを組み立てた後、その床版ユニットを床施工階に吊り上げて床を施工するもので、図1(1)に示す床版地組工程と図1(2)に示す床施工工程とで構成されている。床版地組工程は、デッキプレートの搬入(図中、「ST1」で示す。以下同様)、床版ユニットの組立(ST2)、棒材の組付(ST3)、結束(ST4)、玉掛け(ST5)、床版ユニットの搬送(ST6)、床版ユニットの仮置き(ST7)の各工程を含んでいる。上記のST1〜7は、作業場へのデッキプレートの搬入がなくなるまで、すなわち、図1(1)のST8の判定が「YES」になるまで繰り返し実行される。 FIG. 1 shows the flow of a floor construction method according to an embodiment of the present invention. In this floor construction method, a plurality of deck plates are brought into the ground workplace and the floor slab unit is assembled, and then the floor slab unit is lifted on the floor construction floor to construct the floor. It comprises a floor slab assembly process shown and a floor construction process shown in FIG. The floor slab assembly process includes the loading of the deck plate (indicated by “ST1” in the figure, the same applies hereinafter), the assembly of the floor slab unit (ST2), the assembly of the bar (ST3), the binding (ST4), the sling ( ST5), transport of the floor slab unit (ST6), and temporary placement of the floor slab unit (ST7) are included. The above ST1 to 7 are repeatedly executed until the deck plate is not carried into the work place, that is, until the determination of ST8 in FIG.
床施工工程は、床施工階の仮組立が完了すると、ST9が「YES」となり、床版ユニットの搬送(ST10)、床の施工(ST11)の各工程が実行され、最上階に達するまで、すなわち、ST12の判定が「YES」になるまで上記のST10,11が繰り返し実行される。 In the floor construction process, when temporary assembly of the floor construction floor is completed, ST9 becomes “YES”, and each process of transporting the floor slab unit (ST10) and floor construction (ST11) is executed until reaching the top floor. That is, the above ST10 and 11 are repeatedly executed until the determination of ST12 becomes “YES”.
前記した図12に示したデッキプレート1の構成をさらに詳しく説明すると、図示のデッキプレート1は、溶融亜鉛メッキ鋼板よりなる金属製の基板10と、基板10上に一定の間隔Lで並設された複数の鉄筋トラス11とを備えている。なお、以下の説明において、鉄筋トラス11が並べられる方向を「幅方向」、鉄筋トラス11が延びる方向を「長さ方向」という。基板10上には、長さ方向に沿って所定の間隔で複数の吊り材12が平行に配設され、各吊り材12の頂部に各鉄筋トラス11の上端筋13が溶接により固着されて各鉄筋トラス11が吊持されている。各鉄筋トラス11は、上端筋13と、上端筋13と平行な下端筋14と、上端筋13と下端筋14との間に設けられるラチス筋15とを含んでおり、吊り材12と直交する方向、すなわち、長さ方向に配設されている。基板10の上面には長さ方向に沿って複数の補強用リブ16が一体に形成されている。また、基板10の両側縁には隣のデッキプレートと繋ぐための継ぎ手部17が一体に形成されている。 The structure of the deck plate 1 shown in FIG. 12 will be described in more detail. The illustrated deck plate 1 is arranged in parallel with a metal substrate 10 made of hot-dip galvanized steel plate at a constant interval L on the substrate 10. A plurality of rebar trusses 11 are provided. In the following description, the direction in which the rebar trusses 11 are arranged is referred to as “width direction”, and the direction in which the rebar trusses 11 extend is referred to as “length direction”. On the substrate 10, a plurality of suspension members 12 are arranged in parallel at predetermined intervals along the length direction, and the upper end reinforcement 13 of each rebar truss 11 is fixed to the top of each suspension member 12 by welding. A reinforcing bar truss 11 is suspended. Each reinforcing bar truss 11 includes an upper bar 13, a lower bar 14 parallel to the upper bar 13, and a lattice bar 15 provided between the upper bar 13 and the lower bar 14, and is orthogonal to the suspension member 12. It is arranged in the direction, that is, the length direction. A plurality of reinforcing ribs 16 are integrally formed on the upper surface of the substrate 10 along the length direction. Further, joint portions 17 for connecting to the adjacent deck plates are integrally formed on both side edges of the substrate 10.
図1(1)に戻って、ST1のデッキプレートの搬入工程では複数のデッキプレート1が地上の作業場に搬入される。地上の作業場には、図2に示されるように、2本の架台2,2が平行に設置されており、この架台2,2上に複数のデッキプレート1が積み置かれている。この場合、各デッキプレート1は、2枚を1組として、鉄筋トラス11が互いに噛み合うように重ねて段積みされるので、デッキプレート1の基板10の下面に赤錆が付着することはない。なお、架台2,2にはH形鋼などの鋼材が用いられるが、これに限られるものではない。 Returning to FIG. 1 (1), in the deck plate loading process of ST1, a plurality of deck plates 1 are loaded into the work place on the ground. As shown in FIG. 2, two mounts 2 and 2 are installed in parallel on the ground work place, and a plurality of deck plates 1 are stacked on the mounts 2 and 2. In this case, the deck plates 1 are stacked in a stack so that the rebar trusses 11 mesh with each other as a set, so that red rust does not adhere to the lower surface of the substrate 10 of the deck plate 1. In addition, although steel materials, such as H-shaped steel, are used for the mount frame 2 and 2, it is not restricted to this.
ST2の床版ユニットの組立工程では、図3に示されるように、前工程で搬入された複数のデッキプレート1を架台2,2上に鉄筋トラス11の長さ方向と直交する方向へ基板10が連なるように敷き並べて建造物の相対する梁間のスペースに対応する大きさおよび形状の床版ユニット3を組み立てる。この作業は二人の作業員がデッキプレート1の両端部を持って移動させることにより行われる。基板10と隣のデッキプレート1の基板10とは継ぎ手部17を介して連結される。 In the assembly process of the floor slab unit of ST2, as shown in FIG. 3, the plurality of deck plates 1 carried in the previous process are placed on the bases 2 and 2 in the direction perpendicular to the length direction of the reinforcing bar truss 11. The floor slab units 3 having a size and a shape corresponding to the space between the beams of the building are assembled. This operation is performed by two workers moving the deck plate 1 while holding both ends. The substrate 10 and the substrate 10 of the adjacent deck plate 1 are connected via a joint portion 17.
ST3の棒材の組付工程では、図4に示されるように、前工程で組み立てられた床版ユニット3に2本の金属製の棒材4,4が組み付けられる。各棒材4は基板10が連なる方向に沿う床版ユニット3の中心線cに対して線対称の位置に全長にわたり配置される。棒材4として上端筋13より大きな径の鋼棒が用いられるもので、図6に示されるように、各棒材4は各鉄筋トラス11の上端筋13の下方、下端筋14の上方を通っており、両端は両端位置のデッキプレート1,1まで延びている。 In the assembly process of the bars in ST3, as shown in FIG. 4, the two metal bars 4, 4 are assembled to the floor slab unit 3 assembled in the previous process. Each bar 4 is disposed over the entire length at a position symmetrical with respect to the center line c of the floor slab unit 3 along the direction in which the substrates 10 are continuous. As the bar 4, a steel bar having a diameter larger than that of the upper bar 13 is used. As shown in FIG. 6, each bar 4 passes below the upper bar 13 and above the lower bar 14 of each rebar truss 11. Both ends extend to deck plates 1 and 1 at both ends.
ST4の結束工程では、図5に示されるように、各棒材4を鉄筋トラス11の上端筋13との交差位置において上端筋13に固定する。各棒材4の上端筋13への固定は溶接によることもできるが、この実施例では、上端筋13が溶接による熱の影響を受けないようにするために、各棒材4は各上端筋13との交差位置において金属製の線材40により上端筋13に結束している。なお、各棒材4の上端筋13への結束位置は棒材4の上端筋13との全ての交差位置において行ってもよいが、選択されたいくつかの交差位置で行ってもよい。この結束工程により複数のデッキプレート1は連なった状態が保持され、建造物の柱と梁とで囲まれるスペースに対応する大きさおよび形状の床版ユニット3が完成する。 In the bundling step of ST4, as shown in FIG. 5, each bar 4 is fixed to the upper end bar 13 at a position where it intersects with the upper bar 13 of the reinforcing bar truss 11. The fixing of the bars 4 to the upper end bars 13 can also be performed by welding. In this embodiment, however, in order to prevent the upper end bars 13 from being affected by the heat from the welding, each bar 4 is fixed to the upper end bars. At the crossing position with 13, the upper wire 13 is bound by a metal wire 40. The binding positions of the bars 4 to the upper end bars 13 may be performed at all the intersecting positions with the upper end bars 13 of the bars 4, but may be performed at selected several intersecting positions. By this bundling process, the plurality of deck plates 1 are maintained in a continuous state, and the floor slab unit 3 having a size and shape corresponding to a space surrounded by the pillars and beams of the building is completed.
図7は、ST5の玉掛け工程およびST6の床版ユニットの搬送工程を示している。玉掛け工程では、吊り具5を構成する矩形枠50を介して複数本の玉掛けワイヤー6a,6bを垂下させ、各玉掛けワイヤー6a,6bの下端に設けられたフック61を架台2,2上に支持された床版ユニット3の各棒材4,4に引っ掛ける。前記吊り具5の矩形枠50は、床版ユニット3の外形にほぼ一致する形状であり、2本の平行な棒状の枠材51a,51bと、枠材51a,51bの両端間を結ぶ2本の端枠材52と、中間の3箇所に設けられる中間枠材53,54,55とを含んでいる。 FIG. 7 shows the staking process in ST5 and the conveying process of the floor slab unit in ST6. In the staking process, a plurality of staking wires 6a and 6b are suspended via a rectangular frame 50 that constitutes the hanger 5, and the hooks 61 provided at the lower ends of the staking wires 6a and 6b are supported on the gantry 2 and 2, respectively. It is hooked on each bar 4 and 4 of the floor slab unit 3 that has been made. The rectangular frame 50 of the hanger 5 has a shape that substantially matches the outer shape of the floor slab unit 3, and two parallel rod-shaped frame members 51a and 51b and two pieces that connect between both ends of the frame members 51a and 51b. End frame member 52 and intermediate frame members 53, 54, and 55 provided at three intermediate positions.
各枠材51a,51bの上面の中間枠材53,54,55が設けられる位置にはクレーン(図示せず)より吊り下げられた複数本のワイヤーロープ7の下端部が繋がれる接続部56が形成されている。また、各枠材51a,51bの下面には一定間隔毎に同様の接続部57が形成され、一方の枠材51aの各接続部57より床版ユニット3の一側縁に達する玉掛けワイヤー6aを、他方の枠材51bの各接続部57より床版ユニット3の他側縁に達する玉掛けワイヤー6bを、それぞれ垂下させている。各玉掛けワイヤー6a,6bとして同一長さのフック付きワイヤーロープが用いられ、上端部のシンブル62が前記接続部57に接続され、下端部のシンブル63には床版ユニット3の各棒材4に引っ掛けられるフック61が取り付けられている。 A connecting portion 56 to which the lower end portions of a plurality of wire ropes 7 suspended from a crane (not shown) are connected at positions where the intermediate frame members 53, 54, 55 are provided on the upper surfaces of the respective frame members 51a, 51b. Is formed. Moreover, the same connection part 57 is formed in the lower surface of each frame material 51a, 51b for every fixed interval, and the sling wire 6a which reaches the one side edge of the floor slab unit 3 from each connection part 57 of one frame material 51a is attached. The sling wires 6b reaching the other side edge of the floor slab unit 3 from the respective connection portions 57 of the other frame member 51b are suspended. Wire ropes with hooks of the same length are used as the sling wires 6a and 6b, the thimble 62 at the upper end is connected to the connecting portion 57, and the thimble 63 at the lower end is attached to each bar 4 of the floor slab unit 3. A hook 61 to be hooked is attached.
ST6の床版ユニットの搬送工程では、吊り具5をクレーン(図示せず)より下ろされたワイヤーロープ7により引き上げることにより床版ユニット3を吊り上げ、これにより床版ユニット3を仮置き場へ搬送する。搬送されてきた床版ユニット3は、ST7の床版ユニットの仮置き工程で仮置き場に置かれるもので、上記したST1〜ST7が繰り返されることにより、搬送されてきた床版ユニット3は、図8および図9に示すように、複数段に積み重ねられて段積み状態で仮置かれる。なお、同図では各床版ユニット3は模型的に表してある。また、同図において、100は地面上に敷かれた木製の敷板である。 In the transporting process of the floor slab unit in ST6, the floor slab unit 3 is lifted by lifting the lifting tool 5 with a wire rope 7 lowered from a crane (not shown), thereby transporting the floor slab unit 3 to a temporary storage place. . The transported floor slab unit 3 is placed in a temporary storage place in the temporary storage process of the floor slab unit in ST7, and the transported floor slab unit 3 is shown in FIG. As shown in FIG. 8 and FIG. 9, it is stacked in a plurality of stages and temporarily placed in a stacked state. In the figure, each floor slab unit 3 is schematically shown. In the figure, reference numeral 100 denotes a wooden floor board laid on the ground.
この仮置きに際して、各床版ユニット3は、図10に示すように、その下段の床版ユニット3の鉄筋トラス11の上端筋13上に各鉄筋トラス11と直交する方向にほぼ全幅にわたって並行して置かれる複数本の合成樹脂製のパイプ8を中間に介在させて積み重ねられる。各パイプ8は上面が吊り材12の上方へ突出するように形状および大きさ(径)が定められている。この実施例の各パイプ8は、塩化ビニル製のパイプであり、径方向の断面形状が円形をなす。なお、パイプ8の材質は塩化ビニル以外の合成樹脂であってもよく、また、径方向の断面形状も円形に限らず、楕円形、多角形などであってもよい。
また、この実施例では、パイプ8の本数は2本であって両端部位置にのみ配置されているが、図10において一点鎖線で示すように、両端部位置のパイプ8に加えて、その内側にさらに2本、さらにはそれ以上の本数のパイプ8を適当な間隔で配置してもよい。
At the time of this temporary placement, as shown in FIG. 10, each floor slab unit 3 is parallel to almost the entire width in the direction orthogonal to each reinforcing bar truss 11 on the upper bar 13 of the reinforcing bar truss 11 of the floor slab unit 3 in the lower stage. A plurality of synthetic resin pipes 8 placed in the middle are stacked in the middle. The shape and size (diameter) of each pipe 8 are determined so that the upper surface protrudes above the suspension member 12. Each pipe 8 of this embodiment is a pipe made of vinyl chloride, and its radial cross-sectional shape is circular. The material of the pipe 8 may be a synthetic resin other than vinyl chloride, and the cross-sectional shape in the radial direction is not limited to a circle but may be an ellipse or a polygon.
Further, in this embodiment, the number of the pipes 8 is two and is disposed only at both end positions. However, in addition to the pipes 8 at both end positions, as shown by the one-dot chain line in FIG. Further, two or more pipes 8 may be arranged at an appropriate interval.
鉄骨造の建築物の床を施工する場合、施工すべき建築物の仮組立を完了した後(図1(2)のST9)、ST10の床版ユニットの搬送工程では、仮置き場に積み重ねられた床版ユニット3を最上位置のものから順々に前記吊り具5により吊り上げて建築物の床施工階へ搬送し、ST11の床の施工工程において、図11に示すように、施工すべき床の位置に床版ユニット3を順次位置決め固定する。なお、図中、9は支柱、91は大梁鉄骨、92は小梁鉄骨である。 When constructing the floor of a steel structure building, after completing the temporary assembly of the building to be constructed (ST9 in FIG. 1 (2)), in the transporting process of the floor slab unit of ST10, it was stacked in the temporary storage area. The floor slab unit 3 is lifted by the lifting tool 5 in order from the uppermost one and transported to the floor construction floor of the building. In the floor construction process of ST11, as shown in FIG. The floor slab unit 3 is sequentially positioned and fixed at the position. In the figure, 9 is a support, 91 is a large beam steel frame, and 92 is a small beam steel frame.
上記した床施工方法において、仮置き場に搬入されて複数段に積み重ねられる各床版ユニット3は、その下段の床版ユニット3の鉄筋トラス11の上端筋13上に各鉄筋トラス11と直交する方向にほぼ全幅にわたって平行して置かれる複数本の合成樹脂製のパイプ8を中間に介在させて積み重ねられる。この場合、パイプ8は軽量な塩化ビニル製のパイプが用いられているので、取扱が容易であり、積み上げられた床版ユニット3上に手作業により持ち上げることが可能である。また、径方向の断面形状が円形のパイプ8を用いているので、パイプ8は鉄筋トラス11の上端筋13上を転動させることができ、パイプ8の移動および位置決めが容易である。 In the floor construction method described above, each floor slab unit 3 that is carried into a temporary storage area and stacked in a plurality of stages is in a direction orthogonal to each reinforcing bar truss 11 on the upper bar 13 of the reinforcing bar truss 11 of the lower floor slab unit 3. Are stacked with a plurality of synthetic resin pipes 8 placed in parallel over substantially the entire width. In this case, since the pipe 8 is made of a lightweight vinyl chloride, it is easy to handle and can be manually lifted onto the stacked floor slab unit 3. In addition, since the pipe 8 having a circular cross-sectional shape in the radial direction is used, the pipe 8 can roll on the upper end bar 13 of the reinforcing bar truss 11, and the pipe 8 can be easily moved and positioned.
上端筋13上に支持された各パイプ8はその上面が吊り材12の上方へ突出するので、積み重ねられる床版ユニット3の基板10は、その下段の床版ユニット3の鉄筋トラス11の吊り材12と直接接触しない。このため、仮に、下段の床版ユニット3の吊り材12や上端筋13に赤錆が発生していても、積み重ねられる床版ユニット3の基板10の下面に赤錆が付着することがない。また、基板10の下面に下段の床版ユニット3の吊り材12が押し付けられることがなく、基板10が変形するおそれもない。 Since the upper surface of each pipe 8 supported on the upper end bar 13 protrudes above the suspension member 12, the substrate 10 of the floor slab unit 3 to be stacked is the suspension member of the reinforcing bar truss 11 of the lower floor slab unit 3. No direct contact with 12. For this reason, even if red rust is generated on the suspension members 12 and the upper end bars 13 of the lower floor slab unit 3, the red rust does not adhere to the lower surface of the substrate 10 of the floor slab unit 3 to be stacked. Further, the suspension member 12 of the lower floor slab unit 3 is not pressed against the lower surface of the substrate 10, and there is no possibility that the substrate 10 is deformed.
1 デッキプレート
3 床版ユニット
8 パイプ
10 基板
11 トラス
12 吊り材
13 上端筋
DESCRIPTION OF SYMBOLS 1 Deck plate 3 Floor slab unit 8 Pipe 10 Board | substrate 11 Truss 12 Hanging material 13 Upper end reinforcement
Claims (4)
The floor construction method according to claim 1, wherein the pipe has a circular cross-sectional shape in the radial direction.
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