JP4565332B2 - Stepped slab and its construction method - Google Patents

Stepped slab and its construction method Download PDF

Info

Publication number
JP4565332B2
JP4565332B2 JP2005127651A JP2005127651A JP4565332B2 JP 4565332 B2 JP4565332 B2 JP 4565332B2 JP 2005127651 A JP2005127651 A JP 2005127651A JP 2005127651 A JP2005127651 A JP 2005127651A JP 4565332 B2 JP4565332 B2 JP 4565332B2
Authority
JP
Japan
Prior art keywords
hollow
stepped
slab
reinforcing bar
reinforcing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
JP2005127651A
Other languages
Japanese (ja)
Other versions
JP2006307435A (en
Inventor
久雄 友永
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shimizu Corp
Original Assignee
Shimizu Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shimizu Corp filed Critical Shimizu Corp
Priority to JP2005127651A priority Critical patent/JP4565332B2/en
Publication of JP2006307435A publication Critical patent/JP2006307435A/en
Application granted granted Critical
Publication of JP4565332B2 publication Critical patent/JP4565332B2/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Landscapes

  • Manufacturing Of Tubular Articles Or Embedded Moulded Articles (AREA)
  • Reinforcement Elements For Buildings (AREA)

Description

本発明は、段差付きスラブおよびその施工方法に関する。   The present invention relates to a stepped slab and a construction method thereof.

従来、段差付きスラブは、上下方向に段差を設けた二枚の穴明きプレキャストコンクリート板の段差部にフック付き鉄筋を配した後、当該段差部に現場打ちコンクリートを打設することにより形成している。即ち、段差部は現場施工によって形成されていた。しかし、従来の段差付きスラブは、段差部の配筋が煩雑であり、施工に手間を要するものであった。
そこで、本発明者は、特許文献１において、段差部に定着頭部付き鉄筋を用いることにより、簡潔な配筋構造とし、施工性が良く工期短縮を図れる段差付きスラブを考案した。
特開２００２−２９４９１６号公報 （第２−３頁、第１−３図） Conventionally, a slab with a step is formed by placing a reinforcing bar with a hook on the step portion of two perforated precast concrete plates provided with a step in the vertical direction, and then placing on-site cast concrete on the step portion. ing. That is, the step portion was formed by on-site construction. However, in the conventional stepped slab, the bar arrangement of the stepped portion is complicated, and it takes time for construction.
In view of this, the present inventor has devised a slab with a step in Patent Document 1 by using a reinforcing bar with a fixing head at the stepped portion, thereby providing a simple bar arrangement structure and good workability and shortening the work period.
JP 2002-294916 A (page 2-3, FIG. 1-3)

しかしながら、特許文献１に記載された段差付きスラブも、従来の段差付きスラブと同様、段差部を形成するための型枠工事が必要であった。   However, the stepped slab described in Patent Document 1 also requires formwork for forming the stepped portion, like the conventional stepped slab.

本発明は、特許文献１に記載された段差付きスラブをさらに改良し、型枠工事を大幅に省略し、しかも高い施工精度を確保することができる段差付きスラブおよびその施工方法を提供することを目的とする。   The present invention further improves the slab with a step described in Patent Document 1, provides a slab with a step that can greatly eliminate the formwork, and can ensure high construction accuracy, and a construction method thereof. Objective.

上記目的を達成するため、本発明に係る段差付きスラブは、一方の端部に定着頭部付き鉄筋がそれぞれ配設された一対の中空プレキャストコンクリート板の当該端部同士が上下方向に重ね合わされて段差部が形成されていることを特徴とする。
ここで、定着頭部付き鉄筋とは、鉄筋の定着強度を増大させるため、端部に拡径部が形成された鉄筋のことである。
本発明では、一方の端部に定着頭部付き鉄筋がそれぞれ配設された一対の中空プレキャストコンクリート板の当該端部同士を上下方向に重ね合わせることにより段差部が形成されているため、配筋工事および型枠工事が大幅に省略され施工が効率化される。また、配筋工事および型枠工事の減少に伴い、高い施工精度を確保することが可能となる。 In order to achieve the above object, the stepped slab according to the present invention includes a pair of hollow precast concrete plates each having a fixing head-attached reinforcing bar disposed at one end thereof, and the ends thereof are overlapped in the vertical direction. A step portion is formed.
Here, the reinforcing bar with the fixing head is a reinforcing bar in which a diameter-expanded portion is formed at an end in order to increase the fixing strength of the reinforcing bar.
In the present invention, the stepped portion is formed by overlapping the ends of a pair of hollow precast concrete plates each having a fixing head-attached reinforcing bar at one end in the vertical direction. Construction and formwork will be greatly omitted, and construction will be made more efficient. In addition, along with the decrease in bar arrangement work and formwork, it is possible to ensure high construction accuracy.

また、本発明に係る段差付きスラブでは、前記段差部における上段側と下段側の前記定着頭部付き鉄筋が、せん断補強筋によって拘束されている。
本発明では、段差部における上段側と下段側の定着頭部付き鉄筋を、せん断補強筋で拘束しているので、段差部の強度を増大させることができる。 Moreover, in the stepped slab according to the present invention, the reinforcing head-attached reinforcing bars on the upper side and the lower side of the stepped portion are constrained by shear reinforcement bars .
In the present invention, since the reinforcing bars with fixing heads on the upper side and the lower side in the stepped portion are restrained by the shear reinforcing bars, the strength of the stepped portion can be increased.

また、本発明に係る段差付きスラブの施工方法は、一対の中空プレキャストコンクリート板の端部同士を上下方向に重ね合わせて、上下２段に配設された中空部を有する段差部を形成し、前記中空部を上下方向に連通するスリット部を当該段差部に設ける第一の工程と、前記各中空部に定着頭部付き鉄筋を挿入して、前記スリット部に定着頭部付き鉄筋を上下２段に配設した後、当該スリット部に充填材を充填する第二の工程と、前記一対の中空プレキャストコンクリート板上に配筋してコンクリートを打設する第三の工程とを備えることを特徴とする。
本発明では、段差部に配設された上下２段の中空部を連通するスリット部を設け、当該スリット部に定着頭部付き鉄筋を上下２段に配設して充填材を充填するので、施工作業が大幅に合理化され、工期および工費の縮減を図ることができる。 Moreover, the construction method of the stepped slab according to the present invention is a method in which the end portions of the pair of hollow precast concrete plates are overlapped in the vertical direction to form a stepped portion having hollow portions arranged in two upper and lower stages, A first step of providing a slit portion communicating with the hollow portion in the vertical direction in the stepped portion; a reinforcing bar with a fixing head is inserted into each hollow portion; A second step of filling the slit portion with a filler after being disposed on the step, and a third step of placing the concrete on the pair of hollow precast concrete plates and placing the concrete. And
In the present invention, a slit portion that communicates the upper and lower two-stage hollow portions disposed in the stepped portion is provided, and the fixing head-attached reinforcing bars are disposed in the upper and lower two steps in the slit portion so that the filler is filled. Construction work is greatly streamlined, and the construction period and cost can be reduced.

また、本発明に係る段差付きスラブの施工方法では、前記第二の工程において、上段側と下段側の前記定着頭部付き鉄筋を、せん断補強筋によって拘束してもよい。   Moreover, in the construction method of the stepped slab according to the present invention, in the second step, the upper-stage side and lower-stage side reinforcing bars may be restrained by shear reinforcement bars.

本発明では、一方の端部に定着頭部付き鉄筋がそれぞれ配設された一対の中空プレキャストコンクリート板の当該端部同士を上下方向に重ね合わせることにより段差部が形成されているので、配筋工事および型枠工事を大幅に省略して施工の効率化を図ることができる。また、配筋工事および型枠工事の減少に伴い、高い施工精度を確保することが可能となる。   In the present invention, the stepped portion is formed by overlapping the ends of a pair of hollow precast concrete plates each having a fixing head-attached reinforcing bar at one end in the vertical direction. Construction and formwork can be greatly omitted, and construction efficiency can be improved. In addition, along with the decrease in bar arrangement work and formwork, it is possible to ensure high construction accuracy.

以下、本発明に係る段差付きスラブについて図面に基づいて説明する。
図１は、（ａ）は本発明に係る段差付きスラブの側断面図であり、（ｂ）はそのＡ−Ａ矢視断面図である。
本発明に係る段差付きスラブは、一対の中空プレキャストコンクリート板（以下、中空ＰＣ板と呼ぶ。）２、３の端部同士を上下方向に重ね合わせて段差部１を形成し、中空ＰＣ板２、３上にスラブ筋１１を配筋するとともに段差部１上に上端筋９を配筋してコンクリート１０を打設したものである。 Hereinafter, the stepped slab according to the present invention will be described with reference to the drawings.
1A is a side cross-sectional view of a stepped slab according to the present invention, and FIG. 1B is a cross-sectional view taken along line AA in FIG.
The stepped slab according to the present invention forms a stepped portion 1 by overlapping the ends of a pair of hollow precast concrete plates (hereinafter referred to as hollow PC plates) 2 and 3 in the vertical direction to form a hollow PC plate 2. 3, the slab reinforcement 11 is arranged, and the upper end reinforcement 9 is arranged on the step portion 1, and the concrete 10 is placed.

中空ＰＣ板２、３は、扇形や楕円形などの断面を有する中空部２ａ、３ａがＰＣ板内に複数形成されたものであり、通常、中空部２ａ、３ａはＰＣ板の長辺方向に延在し、短辺方向に並設されている。また、中空部２ａ、３ａと中空部２ａ、３ａとの間にはＰＣ鋼線１５が配設されている。そのため、軽量、高強度、高耐久性という特長を有している。   The hollow PC plates 2 and 3 are formed by a plurality of hollow portions 2a and 3a having a cross section such as a sector or an ellipse in the PC plate. It extends and is arranged side by side in the short side direction. A PC steel wire 15 is disposed between the hollow portions 2a and 3a and the hollow portions 2a and 3a. Therefore, it has the features of light weight, high strength, and high durability.

上段側の中空ＰＣ板２に形成された中空部２ａと下段側の中空ＰＣ板３に形成された中空部３ａは上下方向に整列した状態に配置されており、段差部１では、中空部２ａ、３ａを上下方向に連通し、上方に開放するスリット部４が形成されている。
中空ＰＣ板２、３の端部（段差部１側）には、両端に拡径部を有する定着頭部付き鉄筋５が中空部２ａ、３ａ内にそれぞれ挿入されており、上下２段に配設された定着頭部付き鉄筋５、５同士は、スリット部４において、せん断補強筋７によって拘束されている。
また、段差部１において中空ＰＣ板２、３の短辺方向に配される上端筋９、９に巻かれるコ字状のあばら筋６が、下側の定着頭部付き鉄筋５に連結されている。本発明に係る段差付きスラブでは、段差部１の下端筋を省略し、定着頭部付き鉄筋５で応力を処理する。
なお、定着頭部付き鉄筋５、せん断補強筋７、およびあばら筋６は、各中空部２ａ、３ａに配設されている。 The hollow portion 2a formed in the upper hollow PC plate 2 and the hollow portion 3a formed in the lower hollow PC plate 3 are arranged in a vertically aligned state. In the step portion 1, the hollow portion 2a 3a is formed in the up-down direction, and a slit portion 4 is formed to open upward.
Reinforcing bars 5 with fixing heads having enlarged diameter portions at both ends are inserted into the hollow portions 2a and 3a at the ends (stepped portion 1 side) of the hollow PC plates 2 and 3, respectively. The provided reinforcing bars 5 and 5 with the fixing head are restrained by the shear reinforcing bar 7 in the slit portion 4.
In addition, a U-shaped stirrup 6 wound around the upper end bars 9, 9 arranged in the short side direction of the hollow PC plates 2, 3 in the stepped portion 1 is connected to the lower reinforcing bar 5 with the fixing head. Yes. In the stepped slab according to the present invention, the lower end bars of the stepped portion 1 are omitted, and the stress is processed by the reinforcing head-attached reinforcing bars 5.
In addition, the reinforcing head-attached reinforcing bar 5, the shear reinforcing bar 7, and the ribbed bar 6 are disposed in the hollow portions 2a and 3a.

スリット部４および中空部２ａ、３ａの一部（定着頭部付き鉄筋５が配されている部分）には、モルタルなどの充填材が充填される。この際、充填材が中空部２ａ、３ａの奥まで流れ込まないように、中空部２ａ、３ａ内には仕切板１２を設置しておく。
また、上段側の中空ＰＣ板２と下段側の中空ＰＣ板３との間には、１０〜２０ｍｍ程度の間隙Ｄを設けることとし、当該間隙Ｄに充填材を充填して中空ＰＣ板２、３同士の接着性を向上させるものとする。 Part of the slit portion 4 and the hollow portions 2a and 3a (portions where the reinforcing bar 5 with the fixing head is disposed) is filled with a filler such as mortar. At this time, a partition plate 12 is installed in the hollow portions 2a and 3a so that the filler does not flow into the hollow portions 2a and 3a.
Further, a gap D of about 10 to 20 mm is provided between the upper hollow PC board 2 and the lower hollow PC board 3, and the gap D is filled with a filler, and the hollow PC board 2, The adhesiveness between the three is improved.

ここで、上下２段に配設された定着頭部付き鉄筋５、５の重なり長さと、定着頭部付き鉄筋５から重なり長さを引いた長さ（重なっていない部分の長さ）は、同じ長さＬ２とし、定着頭部付き鉄筋５の直径の３５倍以上とする。また、定着頭部付き鉄筋５には、Ｄ１６〜２５の異形鉄筋を使用する。 Here, the overlap length of the reinforcing head-attached rebars 5 and 5 arranged in two upper and lower stages, and the length obtained by subtracting the overlap length from the fixing head-attached rebar 5 (the length of the non-overlapping portion) are: the same length L 2, and more than 35 times the diameter of the fixing head with rebar 5. Moreover, the deformed reinforcing bar of D16-25 is used for the reinforcing bar 5 with a fixing head.

なお、段差部１には、下段側の中空ＰＣ板３上に配筋されるスラブ筋１１用のアンカー筋８が配設されており、上段側の中空ＰＣ板２の端面（段差部１側）から側方に延出している。   The stepped portion 1 is provided with anchor bars 8 for the slab bars 11 arranged on the lower hollow PC plate 3, and the end surface of the upper hollow PC plate 2 (stepped portion 1 side). ) To the side.

次に、本発明に係る段差付きスラブの施工方法について説明する。
本発明に係る段差付きスラブを施工する場合、工場で製作したハーフプレキャスト状の段差付きスラブを梁間に架設し、その上に配筋してコンクリートを打設するという、工場と現場の二段階工程となる。 Next, the construction method of the stepped slab according to the present invention will be described.
When constructing a stepped slab according to the present invention, a half-precast stepped slab manufactured in a factory is installed between beams, and a concrete is placed by placing a bar on it. It becomes.

図２および図３に、工場における段差付きスラブの製作手順を説明するための図を示す。
先ず、上段側の中空ＰＣ板２に形成された中空部２ａと下段側の中空ＰＣ板３に形成された中空部３ａが上下方向に整列するように、一対の中空ＰＣ板２、３の端部同士を、上下方向に１０〜２０ｍｍ程度の間隙Ｄをあけた状態で重ね合わせて段差部１を形成する（図２参照）。
そして、中空ＰＣ板２、３の端部を一部カットして、上下２段に配設された中空部２ａ、３ａを上下方向に連通し、上方に開放するスリット部４を当該段差部１に形成する。
なお、上段側の中空ＰＣ板２と下段側の中空ＰＣ板３にそれぞれスリット部４を形成した後で、一対の中空ＰＣ板２、３の端部同士を上下方向に重ね合わせてもよい。 FIG. 2 and FIG. 3 are diagrams for explaining a manufacturing procedure of a stepped slab in a factory.
First, the ends of the pair of hollow PC plates 2 and 3 so that the hollow portion 2a formed in the upper hollow PC plate 2 and the hollow portion 3a formed in the lower hollow PC plate 3 are aligned vertically. The step portions 1 are formed by overlapping the portions with a gap D of about 10 to 20 mm in the vertical direction (see FIG. 2).
Then, the end portions of the hollow PC plates 2 and 3 are partially cut, the hollow portions 2a and 3a disposed in the two upper and lower stages are communicated in the vertical direction, and the slit portion 4 that opens upward is the stepped portion 1 To form.
In addition, after forming the slit part 4 in the hollow PC board 2 on the upper stage side and the hollow PC board 3 on the lower stage side, the ends of the pair of hollow PC boards 2 and 3 may be overlapped in the vertical direction.

次いで、各中空部２ａ、３ａに定着頭部付き鉄筋５、５を挿入して、スリット部４に定着頭部付き鉄筋５、５を上下２段に配設し、上段側と下段側の定着頭部付き鉄筋５、５を、せん断補強筋７によって拘束するとともに、コ字状のあばら筋６を、下側の定着頭部付き鉄筋５に連結する。
また、中空部２ａ、３ａ内には仕切板１２を設置しておくとともに、上段側の中空ＰＣ板２の端面（段差部１側）から突出するようにアンカー筋８を配設しておく。 Next, rebars 5 and 5 with fixing heads are inserted into the hollow portions 2a and 3a, and the rebars 5 and 5 with fixing heads are arranged in the upper and lower two stages in the slits 4 so as to fix the upper and lower stages. The head-reinforcing bars 5 and 5 are constrained by the shear reinforcement bars 7, and the U-shaped ribbed bars 6 are connected to the lower fixing head-reinforcing bars 5.
In addition, a partition plate 12 is installed in the hollow portions 2a and 3a, and anchor bars 8 are disposed so as to protrude from the end surface (step portion 1 side) of the upper hollow PC plate 2.

次に、上段側の中空ＰＣ板２と下段側の中空ＰＣ板３の端面（段差部１側）にそれぞれ型枠１３、１３を取り付けて中空部２ａ、３ａを封止した後、スリット部４および定着頭部付き鉄筋５が配されている中空部２ａ、３ａの一部に、モルタルなどの充填材を充填する。この際、間隙Ｄにも充填材を充填する。   Next, after the molds 13 and 13 are attached to the end surfaces (stepped portion 1 side) of the upper hollow PC plate 2 and the lower hollow PC plate 3, respectively, the hollow portions 2a and 3a are sealed, and then the slit portion 4 In addition, a filler such as mortar is filled in a part of the hollow portions 2a and 3a in which the reinforcing bar 5 with the fixing head is arranged. At this time, the gap D is also filled with the filler.

図４は、梁間に段差付きスラブを架設した状態を示す概略図であり、図５は、現場における段差付きスラブの施工手順を説明するための図である。
工場で製作された段差付きスラブＳは、建設現場に搬入され、梁Ｂ、Ｂ間に架設される。梁Ｂの上部には、切欠部Ｂａが形成されており、段差付きスラブＳは切欠部Ｂａ上に載置する。なお、段差付きスラブＳを切欠部Ｂａ上に載置せず、支保工（図示省略）で支持してもよい。 FIG. 4 is a schematic view showing a state where a stepped slab is installed between beams, and FIG. 5 is a diagram for explaining a construction procedure of the stepped slab in the field.
The stepped slab S manufactured at the factory is carried into the construction site and is installed between the beams B and B. A notch Ba is formed at the top of the beam B, and the stepped slab S is placed on the notch Ba. Note that the stepped slab S may not be placed on the notch Ba, but may be supported by a support (not shown).

次いで、中空ＰＣ板２、３上にスラブ筋１１をシングル配筋するとともに段差部１上のあばら筋６に交差させて上端筋９を配筋する。そして、段差部１の上部側面に型枠１４を設置した後、中空ＰＣ板２、３上にコンクリート１０を打設する。   Next, a single slab barb 11 is placed on the hollow PC plates 2 and 3, and an upper end bar 9 is arranged across the rib 6 on the stepped portion 1. And after installing the formwork 14 on the upper side surface of the stepped portion 1, the concrete 10 is placed on the hollow PC plates 2 and 3.

本実施形態では、一対の中空ＰＣ板２、３の端部同士を上下方向に重ね合わせて段差部１を形成し、当該段差部１に配設された上下２段の中空部２ａ、３ａを連通するスリット部４を設け、当該スリット部４に定着頭部付き鉄筋５、５を上下２段に配設して充填材を充填するので、配筋工事および型枠工事が大幅に省略され施工を効率化することができる。また、配筋工事および型枠工事の減少に伴い、高い施工精度を確保することが可能となる。   In this embodiment, the end portions of the pair of hollow PC plates 2 and 3 are overlapped in the vertical direction to form the stepped portion 1, and the upper and lower two-step hollow portions 2 a and 3 a disposed on the stepped portion 1 are formed. Since the slit part 4 which communicates is provided, and the reinforcing bars 5 and 5 with fixing heads are arranged in the upper and lower stages in the slit part 4 and filled with the filler, the bar arrangement work and the formwork work are largely omitted. Can be made more efficient. In addition, along with the decrease in bar arrangement work and formwork, it is possible to ensure high construction accuracy.

以上、本発明に係る段差付きスラブについて説明したが、本発明は上記の実施形態に限定されるものではなく、その趣旨を逸脱しない範囲で適宜変更可能であり、要は、本発明において所期の機能が得られればよいのである。 As described above, the stepped slab according to the present invention has been described, but the present invention is not limited to the above-described embodiment, and can be appropriately changed without departing from the gist thereof. It is only necessary to obtain the function.

（ａ）は本発明に係る段差付きスラブの側断面図であり、（ｂ）はそのＡ−Ａ矢視断面図である。(A) is a sectional side view of the stepped slab according to the present invention, and (b) is an AA arrow sectional view. 工場における段差付きスラブの製作手順を説明するための図であり、（ａ）は段差付きスラブの側断面図、（ｂ）はＢ−Ｂ矢視断面図である。It is a figure for demonstrating the manufacture procedure of the slab with a level | step difference in a factory, (a) is a sectional side view of a slab with a level | step difference, (b) is a BB arrow sectional drawing. 工場における段差付きスラブの製作手順を説明するための図であり、（ａ）は段差付きスラブの側断面図、（ｂ）はＣ−Ｃ矢視断面図である。It is a figure for demonstrating the manufacture procedure of the slab with a level | step difference in a factory, (a) is a sectional side view of a slab with a level | step difference, (b) is CC sectional view taken on the line. 梁間に段差付きスラブを架設した状態を示す概略図である。It is the schematic which shows the state which constructed the slab with a level | step difference between beams. 現場における段差付きスラブの施工手順を説明するための段差付きスラブの側断面図である。It is a sectional side view of the stepped slab for explaining the construction procedure of the stepped slab at the site.

符号の説明Explanation of symbols

１ 段差部
２、３ 中空ＰＣ板
２ａ、３ａ 中空部
４ スリット部
５ 定着頭部付き鉄筋
６ あばら筋
７ せん断補強筋
８ アンカー筋
９ 上端筋
１０ コンクリート
１１ スラブ筋
１２ 仕切板
１３、１４ 型枠
１５ ＰＣ鋼線
Ｄ 間隙
Ｂ 梁
Ｂａ 切欠部
Ｓ 段差付きスラブ DESCRIPTION OF SYMBOLS 1 Step part 2, 3 Hollow PC board 2a, 3a Hollow part 4 Slit part 5 Reinforcing bar with fixing head 6 Stirrup 7 Shear reinforcement bar 8 Anchor bar 9 Top bar 10 Concrete 11 Slab bar 12 Partition plates 13 and 14 Form 15 PC steel wire D Gap B Beam Ba Notch S Slab with step

Claims (3)

一方の端部に定着頭部付き鉄筋がそれぞれ配設された一対の中空プレキャストコンクリート板の当該端部同士が上下方向に重ね合わされて段差部が形成され、
前記段差部における上段側と下段側の前記定着頭部付き鉄筋が、せん断補強筋によって拘束されていることを特徴とする段差付きスラブ。 A stepped portion is formed by overlapping the ends of a pair of hollow precast concrete plates each having a fixing head-attached reinforcing bar at one end in the vertical direction ,
A stepped slab, wherein the reinforcing bar with fixing head on the upper side and the lower side of the stepped portion is constrained by a shear reinforcing bar. 一対の中空プレキャストコンクリート板の端部同士を上下方向に重ね合わせて、上下２段に配設された中空部を有する段差部を形成し、前記中空部を上下方向に連通するスリット部を当該段差部に設ける第一の工程と、
前記各中空部に定着頭部付き鉄筋を挿入して、前記スリット部に定着頭部付き鉄筋を上下２段に配設した後、当該スリット部に充填材を充填する第二の工程と、
前記一対の中空プレキャストコンクリート板上に配筋してコンクリートを打設する第三の工程とを備えることを特徴とするスラブの施工方法。 The ends of the pair of hollow precast concrete plates are overlapped in the vertical direction to form a stepped portion having a hollow portion arranged in two upper and lower steps, and the slit portion communicating the hollow portion in the vertical direction is the step A first step provided in the section;
A second step of inserting a reinforcing head-attached reinforcing bar into each of the hollow parts, and arranging the fixing head-attached reinforcing bar in the upper and lower stages in the slit part, and then filling the slit part with a filler;
And a third step of placing the concrete on the pair of hollow precast concrete plates and placing the concrete thereon. 前記第二の工程において、
上段側と下段側の前記定着頭部付き鉄筋を、せん断補強筋によって拘束することを特徴とする請求項２に記載の段差付きスラブの施工方法。 In the second step,
3. The method for constructing a slab with a step according to claim 2 , wherein the reinforcing head-attached reinforcing bars on the upper side and the lower side are restrained by a shear reinforcing bar.
JP2005127651A 2005-04-26 2005-04-26 Stepped slab and its construction method Expired - Fee Related JP4565332B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2005127651A JP4565332B2 (en) 2005-04-26 2005-04-26 Stepped slab and its construction method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2005127651A JP4565332B2 (en) 2005-04-26 2005-04-26 Stepped slab and its construction method

Publications (2)

Publication Number Publication Date
JP2006307435A JP2006307435A (en) 2006-11-09
JP4565332B2 true JP4565332B2 (en) 2010-10-20

Family

ID=37474632

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2005127651A Expired - Fee Related JP4565332B2 (en) 2005-04-26 2005-04-26 Stepped slab and its construction method

Country Status (1)

Country Link
JP (1) JP4565332B2 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4782760B2 (en) * 2007-10-24 2011-09-28 株式会社熊谷組 Floor slab with steps and its construction method
KR102548457B1 (en) * 2020-12-24 2023-06-28 한국건설기술연구원 Precast fireproof hollow core slab, and construction method for the same

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002294916A (en) * 2001-03-28 2002-10-09 Shimizu Corp Structure of stepped slab and method for executing stepped slab
JP2003239438A (en) * 2002-02-20 2003-08-27 Fujimori Sangyo Kk Concrete slab with stepped section
JP2005220671A (en) * 2004-02-06 2005-08-18 Asuka Kenchiku Kozo Jimusho:Kk Construction method of concrete floor having level difference and its structure and concrete plate having level difference used for the construction method

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002294916A (en) * 2001-03-28 2002-10-09 Shimizu Corp Structure of stepped slab and method for executing stepped slab
JP2003239438A (en) * 2002-02-20 2003-08-27 Fujimori Sangyo Kk Concrete slab with stepped section
JP2005220671A (en) * 2004-02-06 2005-08-18 Asuka Kenchiku Kozo Jimusho:Kk Construction method of concrete floor having level difference and its structure and concrete plate having level difference used for the construction method

Also Published As

Publication number Publication date
JP2006307435A (en) 2006-11-09

Similar Documents

Publication Publication Date Title
KR101107300B1 (en) Steel plate shear wall
JP4078367B2 (en) Cable-stayed cable fixing structure
KR20120011043A (en) Half precast floor plank, and slab construction method using same
JP2014095256A (en) Ribbed precast concrete plate, and method for separately placing concrete in composite floor slab and beam using the ribbed precast concrete plate
JP2008266910A (en) Projection structure of anchorage or deviator of tendon, and construction method therefor
JP5602455B2 (en) Beam members and building structures
JP4565332B2 (en) Stepped slab and its construction method
KR20170108215A (en) I section steel half precast slab and manufacturing method and construction method of the same
JP6362141B2 (en) Reinforcing bar reinforced frame, hoop, and reinforcing bar
JP6308502B2 (en) Construction method of pre-tension slab in overhang construction
KR20090096813A (en) Structure of hanging precast concrete slab on precast concrete beam
WO2015146907A1 (en) Beam member and framework employing same
JP5750246B2 (en) Composite beam, building, and composite beam construction method
JP3797560B2 (en) Bridge segment and its construction method
KR20100045740A (en) Support assembly for precast half depth cantilever deck, constructing method of such cantilever deck, bridge using such assembly and constructing method for such bridge
JP4813247B2 (en) Reinforced concrete beam members
JP7022052B2 (en) How to reinforce existing floors
JP2020063634A (en) Junction structure and junction method for precast concrete beam member
KR102234463B1 (en) the shear reinforcement unit and the shear reinforcing structure of reinforced concrete structure using the same
CN211735793U (en) Connecting joint of superposed column and floor slab
KR102000531B1 (en) Hybrid module type slab construction method
KR200407184Y1 (en) Precasted concrete plate
KR100974672B1 (en) Precast concrete beam reinforced dapped end
JP2009150115A (en) Prestressed concrete beam and method of constructing the same
JP4999817B2 (en) PC beam joint structure

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20071219

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20100326

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20100406

A521 Request for written amendment filed

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20100526

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20100706

A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20100721

R150 Certificate of patent or registration of utility model

Ref document number: 4565332

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R150

Free format text: JAPANESE INTERMEDIATE CODE: R150

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20130813

Year of fee payment: 3

S531 Written request for registration of change of domicile

Free format text: JAPANESE INTERMEDIATE CODE: R313531

R350 Written notification of registration of transfer

Free format text: JAPANESE INTERMEDIATE CODE: R350

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20140813

Year of fee payment: 4

LAPS Cancellation because of no payment of annual fees