JP4429771B2 - Hollow slab construction method - Google Patents

Hollow slab construction method Download PDF

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JP4429771B2
JP4429771B2 JP2004076482A JP2004076482A JP4429771B2 JP 4429771 B2 JP4429771 B2 JP 4429771B2 JP 2004076482 A JP2004076482 A JP 2004076482A JP 2004076482 A JP2004076482 A JP 2004076482A JP 4429771 B2 JP4429771 B2 JP 4429771B2
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concrete
slab
embedded member
metal
driven
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良 高橋
伸一 阿部
高清 和田
信一 飯塚
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Nishimatsu Construction Co Ltd
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Description

本発明は、中空スラブの中空部を形成するために用いる埋設部材と、これを用いた中空スラブ及びその施工方法に関する。   The present invention relates to an embedded member used for forming a hollow portion of a hollow slab, a hollow slab using the same, and a construction method thereof.

従来、中空スラブを施工する場合は、軽量鋼管（ワインディング・パイプ）や発泡埋設材をセットしてコンクリートを打込むことによりスラブ内に中空部を形成していた（例えば特許文献１、２参照）。このような中空部の形成により、スラブの軽量化・大スパン化が図れる。
ただし、コンクリート打込み時には、軽量鋼管や発泡埋設材に多大な浮力が生じるため軽量鋼管や発泡埋設材を固定しておかなければならない（例えば特許文献３参照）。
特開平１０−１５９２２８号公報 特開平１０−３３１３１０号公報 特開２０００−３３６８２１号公報 Conventionally, when a hollow slab is constructed, a hollow portion is formed in the slab by setting a lightweight steel pipe (winding pipe) or a foamed embedding material and driving concrete (for example, see Patent Documents 1 and 2). . By forming such a hollow portion, the slab can be reduced in weight and span.
However, when placing concrete, a large amount of buoyancy is generated in the lightweight steel pipe and the foam embedment material, so the lightweight steel pipe and the foam embedment material must be fixed (for example, see Patent Document 3).
JP-A-10-159228 Japanese Patent Laid-Open No. 10-331310 JP 2000-336821 A

しかし、軽量鋼管や発泡埋設材の固定には多大の手間を要し、コンクリート打込み時において、軽量鋼管や発泡埋設材の下方へのコンクリート充填状況が目視できない欠点があった。また、細心の注意を払っても軽量鋼管や発泡埋設材の下方にジャンカが生じる恐れがある等、施工上の問題があった。   However, fixing the lightweight steel pipe and the foam burying material requires a great deal of labor, and there is a drawback that the concrete filling state below the lightweight steel pipe and the foam burying material cannot be visually observed when placing concrete. In addition, even with great care, there was a problem in construction, such as a possibility that a junker might be formed under the lightweight steel pipe or the foamed buried material.

本発明の課題は、中空スラブの施工において、コンクリート打込み時に埋設部材に浮力が生じにくく、かつ埋設部材下方のコンクリート打込み状況も目視可能とすることである。   It is an object of the present invention to make it difficult for buoyancy to occur in an embedded member when placing concrete into a hollow slab, and to make the concrete placement state below the embedded member visible.

以上の課題を解決するため、本発明は、例えば図１及び図２に示すように、中空スラブの中空部を形成するための金属製の埋設部材１を用いた中空スラブの施工方法であって、
立体状に組付けられた金属製骨組２と、この金属製骨組に対しその全周囲を囲んで取付けられた金属製ラス５とからなる直方体形状の埋設部材１を、隣り合うスラブ鉄筋１１の間にセットした後、
先ず、前記埋設部材１の側方に高さ１／３までコンクリートを打込み、
次いで、前記埋設部材１の側方に上端までコンクリートを打込み、引き続いてスラブ天端までコンクリートを打込むことを特徴とする。 In order to solve the above problems, the present invention is a method for constructing a hollow slab using a metal embedded member 1 for forming a hollow portion of a hollow slab as shown in FIGS. 1 and 2, for example. ,
A rectangular parallelepiped-shaped embedded member 1 including a metal frame 2 assembled in a three-dimensional shape and a metal lath 5 attached to the metal frame so as to surround the entire periphery is provided between adjacent slab reinforcing bars 11. After setting
First, concrete is driven to the side of the embedded member 1 to a height of 1/3,
Next, the concrete is driven to the side of the embedded member 1 up to the upper end, and then the concrete is driven to the top of the slab .

このように、金属製骨組を金属製ラスで囲んだ埋設部材なので、コンクリート打込み時に浮力が生じにくく、特別な固定を必要としない。しかも、金属製ラスの小孔を通して埋設部材下方のコンクリート打込み状況も目視できる。   Thus, since it is an embedded member in which a metal frame is surrounded by a metal lath, buoyancy is unlikely to occur when placing concrete, and no special fixation is required. Moreover, the concrete placement state below the embedded member can be visually confirmed through a small hole in the metal lath.

このように、埋設部材が直方体形状なので、埋設部材下面までのコンクリート打込みを確実に確認できる。   Thus, since the embedded member is a rectangular parallelepiped shape, it is possible to surely confirm the concrete driving up to the lower surface of the embedded member.

本発明は、中空スラブの施工方法であって、例えば図１及び図２に示すように、埋設部材１をセットした後、コンクリートを打込むことを特徴とする。 The present invention provides a method of installing hollow slabs, as shown in FIGS. 1 and 2, after setting the portion material 1 buried, characterized in that implanting the concrete.

以上のように、埋設部材をセットしてコンクリートを打込むことにより中空スラブを施工することで、埋設部材下にジャンカ等の欠陥のない中空スラブを施工できる。   As described above, a hollow slab having no defect such as a junker can be constructed under the buried member by constructing the hollow slab by setting the buried member and driving concrete.

本発明は、中空スラブの施工方法であって、先ず、前記埋設部材１の側方に高さ１／３までコンクリートを打込み、次に、前記埋設部材１の側方に上端までコンクリートを打込み、引き続いてスラブ天端までコンクリートを打込むことを特徴とする。 The present invention is a method for constructing a hollow slab, in which concrete is first driven into the side of the embedded member 1 to a height of 1/3, and then concrete is driven into the side of the embedded member 1 to the upper end, It is characterized by driving concrete into the top of the slab.

このように、先ず、埋設部材の側方に高さ１／３までコンクリートを打込むことで、埋設部材を固定しなくても、ラスの小孔を通して埋設部材下端までのコンクリート打込みを目視して確認できる。次に、埋設部材の側方に上端までコンクリートを打込んでから、引き続いてスラブ天端までコンクリートを打込むことで、ラスの小孔から埋設部材内へのコンクリートノロのこぼれも少なく施工できる。   Thus, first, by placing concrete to the side of the buried member to a height of 1/3, the concrete placement to the bottom of the buried member through the small hole of the lath is visually observed without fixing the buried member. I can confirm. Next, concrete is driven to the top of the buried member to the upper end, and then concrete is driven to the top of the slab, so that it is possible to reduce the spillage of concrete from the small hole of the lath into the buried member.

本発明によれば、コンクリート打込み時に金属製の埋設部材に浮力が生じにくく、特別な固定を必要としない。しかも、金属製骨組を囲んだ金属製ラスの小孔を通して埋設部材下方のコンクリート打込み状況も目視できる。従って、中空スラブの施工において、埋設部材下にジャンカ等の欠陥を回避できる。 According to the present invention , buoyancy is unlikely to occur in the metal burying member during concrete pouring, and no special fixing is required. Moreover, the concrete placement state below the embedded member can also be visually confirmed through a small hole in the metal lath surrounding the metal frame. Therefore, in the construction of the hollow slab, it is possible to avoid a defect such as a jumper under the embedded member.

本発明によれば、直方体形状によって埋設部材下面までのコンクリート打込みを確実に確認できる。 According to the present invention, it is possible to reliably confirm the concrete driving up to the bottom surface of the embedded member by the rectangular parallelepiped shape.

本発明によれば、埋設部材をセットしてコンクリートを打込むことにより、埋設部材下にジャンカ等の欠陥のない中空スラブを施工できる。 According to the present invention , a hollow slab having no defect such as a jumper can be constructed under the embedded member by setting the embedded member and driving concrete.

本発明によれば、埋設部材を固定しなくても、ラスの小孔を通して埋設部材下端までのコンクリート打込みを目視して確認でき、ラスの小孔から埋設部材内へのコンクリートノロのこぼれも少なく施工できる。 According to the present invention, it is possible to visually confirm the concrete driving from the lath small hole to the lower end of the buried member without fixing the buried member, and there is little spillage of concrete from the lath small hole into the buried member. Can be constructed.

以下、図を参照して本発明を実施するための最良の形態を詳細に説明する。
本発明を適用した一実施形態の構成を示す図１及び図２において、１は本発明に係る埋設部材、１１はスラブ鉄筋である。 Hereinafter, the best mode for carrying out the present invention will be described in detail with reference to the drawings.
In FIG.1 and FIG.2 which shows the structure of one Embodiment to which this invention is applied, 1 is an embedded member which concerns on this invention, 11 is a slab reinforcement.

本発明に係る埋設部材１は、例えば図示のように、直方体形状の金属製骨組２の全周囲に金属製ラス５を取付けたものである。
すなわち、金属製骨組２は、例えば鋼製アングル３及び鋼棒４等を溶接して直方体形状に組上げたものである。この金属製骨組２の全周囲６面に、例えばメタルラスやワイヤーラス（金網）による金属製ラス５を溶接等により取付けて埋設部材１を製作する。一例としては、金属製骨組２として４０×４０×３ｍｍの等辺山形鋼３を１ｍ間隔として用い、金属製ラス５としてＪＩＳ Ａ ５５０５「メタルラス」の平ラス３号を用いる。 The burying member 1 according to the present invention has a metal lath 5 attached to the entire periphery of a rectangular parallelepiped metal framework 2 as shown in the figure, for example.
That is, the metal frame 2 is formed by welding, for example, a steel angle 3 and a steel bar 4 to a rectangular parallelepiped shape. An embedded member 1 is manufactured by attaching metal laths 5 such as metal laths or wire laths (wire nets) to the entire 6 surfaces of the metal frame 2 by welding or the like. As an example, a 40 × 40 × 3 mm equilateral angle steel 3 is used as a metal frame 2 at 1 m intervals, and a flat lath 3 of JIS A 5505 “metal lath” is used as a metal lath 5.

このような金属製骨組２及び金属製ラス５からなる直方体形状の埋設部材１を、図１及び図２に示したように、スラブ鉄筋１１の間にセットする。この埋設部材１のセットは、固定せずにスラブ鉄筋１１の間に置くだけでよい。なお、埋設部材１は図示しないスラブ鉄筋上に図示しないスペーサを用い所定間隔を開けて置かれる。
その後、コンクリートを打込む。 The rectangular parallelepiped embedded member 1 including the metal frame 2 and the metal lath 5 is set between the slab reinforcing bars 11 as shown in FIGS. The set of the embedded member 1 may be placed between the slab reinforcing bars 11 without being fixed. The embedded member 1 is placed on a slab reinforcing bar (not shown) at a predetermined interval using a spacer (not shown).
Then, concrete is driven in.

図示しないが、コンクリートの打込み手順は次の通りである。
（１）埋設部材１の両側方に高さ１／３までコンクリートを打込む。
ここで、梁部材の鉄筋（スラブ鉄筋１１参照）と埋設部材１とのかぶり厚さの確保は通常のスペーサーを用いるが、埋設部材１の片側へ初めてコンクリートを打込むタイミングにおいては、埋設部材１が横移動しないように、桟木等を埋設部材１と鉄筋との間に挿入する。この桟木等は、片側の高さ１／３までコンクリートが打込まれた時点で抜き取り、その逆側に打込むタイミングにおいては不要である。
（２）埋設部材１の両側方に上端までコンクリートを打込み、引き続いてスラブ天端までコンクリートを打込む。 Although not shown, the concrete placing procedure is as follows.
(1) Pour concrete into both sides of the buried member 1 to a height of 1/3.
Here, a normal spacer is used to secure the cover thickness between the reinforcing bar of the beam member (see the slab reinforcing bar 11) and the embedded member 1, but at the timing when concrete is first driven into one side of the embedded member 1, the embedded member 1 is used. In order not to move laterally, a crosspiece or the like is inserted between the embedded member 1 and the reinforcing bar. This plinth or the like is not necessary when the concrete is driven to a height of 1/3 on one side and driven on the opposite side.
(2) The concrete is driven to the upper end on both sides of the embedded member 1 and then the concrete is driven to the top of the slab.

以上の通り、金属製骨組２を金属製ラス５で囲んだ直方体形状の埋設部材１としたため、コンクリート打込み時において、鋼製アングル３及び鋼棒４を組上げた金属製骨組２と金属製ラス５の自重により浮力が生じにくく、しかも、コンクリート打込み手順（１）において、金属製ラス５の小孔を通して目視により埋設部材１下方のコンクリート打込み状況も確認できる利点がある。
従って、埋設部材１を固定しなくても、中空部下にジャンカ等の欠陥のない中空スラブを施工できるものとなる。 As described above, since the metal frame 2 is the rectangular parallelepiped embedded member 1 surrounded by the metal lath 5, the metal frame 2 and the metal lath 5 assembled with the steel angle 3 and the steel rod 4 when the concrete is driven. Due to its own weight, buoyancy is unlikely to occur, and in the concrete placing procedure (1), there is an advantage that the concrete placing state below the embedded member 1 can be visually confirmed through a small hole in the metal lath 5.
Therefore, even if the embedded member 1 is not fixed, a hollow slab having no defect such as a jumper can be constructed under the hollow portion.

そして、埋設部材１の側方に高さ１／３までのコンクリート打込み手順（１）、埋設部材１の上端までのコンクリート打込み、続くスラブ天端までのコンクリート打込み手順（２）に分けたため、金属製ラス５の小孔から目視により埋設部材１内へのコンクリートノロのこぼれを少なく確認しながらコンクリート打込み作業を行える利点がある。   And since it was divided into the concrete placing procedure (1) to the height of 1/3 to the side of the buried member 1, the concrete placing procedure up to the upper end of the buried member 1, and the concrete placing procedure (2) up to the slab top end, the metal There is an advantage that the concrete placing operation can be carried out while confirming a small amount of spillage of concrete into the embedded member 1 by visual inspection from a small hole of the lath 5 made.

なお、以上の埋設部材は、壁に埋設して中空部を形成するのに用いても良い。
また、埋設部材の立体形状も任意であり、その他、具体的な細部構造等についても適宜に変更可能であることは勿論である。 In addition, you may use the above embedded member for embedding in a wall and forming a hollow part.
Also, the three-dimensional shape of the embedded member is arbitrary, and it is needless to say that other detailed structures can be appropriately changed.

本発明を適用した一実施形態の構成を示すもので、本発明に係る埋設部材をセットしてスラブ鉄筋を配筋した状態を斜め側方から示した概略斜視図である。BRIEF DESCRIPTION OF THE DRAWINGS It is the schematic perspective view which showed the structure of one Embodiment to which this invention is applied, and showed the state which set the burying member which concerns on this invention and arranged the slab reinforcement from the diagonal side. 図１と同じく斜め上方から示した概略斜視図である。It is the schematic perspective view shown from diagonally upward similarly to FIG.

符号の説明Explanation of symbols

１ 埋設部材
２ 金属製骨組
３ 鋼製アングル
４ 鋼棒
５ 金属製ラス
１１ スラブ鉄筋 DESCRIPTION OF SYMBOLS 1 Embedded member 2 Metal frame 3 Steel angle 4 Steel bar 5 Metal lath 11 Slab reinforcement

Claims (1)

中空スラブの中空部を形成するための金属製の埋設部材を用いた中空スラブの施工方法であって、
立体状に組付けられた金属製骨組と、この金属製骨組に対しその全周囲を囲んで取付けられた金属製ラスとからなる直方体形状の埋設部材を、隣り合うスラブ鉄筋の間にセットした後、
先ず、前記埋設部材の側方に高さ１／３までコンクリートを打込み、
次いで、前記埋設部材の側方に上端までコンクリートを打込み、引き続いてスラブ天端までコンクリートを打込むことを特徴とする中空スラブの施工方法。 A method for constructing a hollow slab using a metal buried member for forming a hollow portion of the hollow slab,
After setting a rectangular parallelepiped embedded member consisting of a metal frame assembled in three dimensions and a metal lath attached to the metal frame so as to surround the entire circumference, between adjacent slab reinforcing bars ,
First, concrete is driven to the side of the buried member to a height of 1/3,
Next, the method for constructing a hollow slab, wherein concrete is driven to the upper side of the embedded member to the upper end, and then the concrete is driven to the top of the slab .
JP2004076482A 2004-03-17 2004-03-17 Hollow slab construction method Expired - Fee Related JP4429771B2 (en)

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JP4429771B2 true JP4429771B2 (en) 2010-03-10

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