JP4068995B2 - Fan-shaped non-beam slab - Google Patents

Fan-shaped non-beam slab Download PDF

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Publication number
JP4068995B2
JP4068995B2 JP2003058211A JP2003058211A JP4068995B2 JP 4068995 B2 JP4068995 B2 JP 4068995B2 JP 2003058211 A JP2003058211 A JP 2003058211A JP 2003058211 A JP2003058211 A JP 2003058211A JP 4068995 B2 JP4068995 B2 JP 4068995B2
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Prior art keywords
slab
fan
shaped
slab element
shaped non
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JP2004270153A (en
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隆 鴇田
正人 木村
徳博 長尾
昇孝 菅野
恭哉 田中
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株式会社三菱地所設計
株式会社富士ピー・エス
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Description

【0001】
【発明の属する技術分野】
この発明は、段差部を有した段差付きスラブであって構造物のコーナー部に梁や小梁無しに敷設することのできる扇型無梁板スラブに関するものである。
【0002】
【従来の技術】
一般に、PC合成床は、プレキャストPC版と現場打ちコンクリートとが一体となってコンクリート床スラブを構築するもので、特に段差付きPC版は、建築物の高低差のある床、例えば、浴室部分等に使用される。近年、住宅や公共建築物において、高齢者や身体障害者等の利用者を配慮し、床段差をなくしたバリアーフリーの設計思想が一般化している。現場打ちのコンクリート床の設計では、仕上げや設備配管等により床に部分的な高低差が生じる場合、予めその部分に床スラブを低く施工するために、小梁、孫梁を設けて対応していた。
しかし、これでは、施工が煩雑であると共に、住宅等階高の制限が厳しい建築物では、小梁を設けることで設計計画上の不都合が生じる場合が存在した。
【0003】
図7は、従来の構造建物のコーナー部における床スラブの組立て手順の一例を示す平面図である。ここで、構造建物のコーナー部に床スラブ1を敷設する場合、柱1Aと柱1Bおよび柱1Cの間に梁2、3を設け、床スラブ1をこれら梁2、3と窓側の梁4、5の間に架け渡して構築していた。
【0004】
【発明が解決しようとする課題】
しかし、上記構造建物のコーナー部において、従来の床スラブを使用して床スラブ構造を構築した場合、柱1Aと柱1Bおよび柱1Cの間に梁2、3を必ず設けなければならないと云う欠点が存在した。また、コーナー部においても、段差スラブを構築するためには、小梁、孫梁を必要としていた。
【0005】
この発明は上記に鑑み提案されたもので、構造建物のコーナー部において床スラブを構築する場合に、柱間に梁や小梁を構築する必要のない扇型無梁板スラブを提供することを目的とする。
【0006】
【課題を解決するための手段】
上記目的を達成するために、請求項1に記載の発明は、板状の第1の扇型スラブ要素と板状部材の上面に複数のリブ形成された第2の扇型スラブ要素とが段差部を介して一体化した建物のコーナー部に使用する扇型無梁板スラブであって、前記第1のスラブ要素の先端部と前記第2のスラブ要素の基端部を重ね合わせると共に、前記第2の扇型スラブ要素の基端部側から突設された差込用リブと前記第1の扇型スラブ要素とを所定の空間を有して重ね合わせた部分に鉄筋を配筋し周囲からコンクリートを打設して一体化することを特徴としている。
【0007】
また、請求項2に記載の発明は、前記差込用リブは、前記リブが延設されたものであり、内部にPC鋼材が緊張力を付与された状態で配設されていることを特徴とする。
【0008】
また、請求項3に記載の発明は、前記差込用リブは、複数のコッターが形成されたことを特徴としている。
【0009】
【発明の実施の形態】
以下、一実施の形態を示す図面に基づいて本発明を詳細に説明する。図1は本発明に係る扇型無梁板スラブによる施工例を示す平面図、図2は本発明の扇型無梁板スラブの組立手順を示す平面図、図3は、本発明の扇型無梁板スラブの組立例を示す平面図である。ここで、扇型無梁板スラブ10は、第1の扇型スラブ要素11と第2の扇型スラブ要素12とが段差部を介して一体化した扇型無梁板スラブであって、前記第1のスラブ要素11と前記第2のスラブ要素12とを一部重複して重ね合わせ、重ね合わせた部分に鉄筋を配筋し周囲からコンクリートを打設して一体化して構築する。
【0010】
第1のスラブ要素11は、ほぼ扇型をしており要部11aが狭く、先端に向かって拡開している。また、先端には、第2の扇型スラブ要素12の一部を重ね合わせる接合部11bが形成されている。第1の扇型スラブ要素11と第2の扇型スラブ要素12の重ね合わせ部において段差部を形成するべく、接合部11b上に第2の扇型スラブ要素12の接合部12aを載せる。接合部12aは、差込用リブのみが形成されており、差込用リブには複数のコッターを形成してもよい。
【0011】
また、第2のスラブ要素12は、基端部が狭く先端が拡開されて構成されている。第2の扇型スラブ要素12には、差込リブに連続したリブ12bが配設されており、このリブの内部にPC鋼材が配筋されている。
【0012】
以上のように構成された第1のスラブ要素11と第2のスラブ要素12は、接合部12aで段差部を形成するように重ね合わせた後、重ね合わせた部分に鉄筋を配筋し周囲からコンクリートを打設して一体化する。このようにして扇型無梁板スラブを構築すれば、大型スラブを計画する建物の隅部において段差付きの床スラブを小梁なしで施工することができる。
【0013】
また、第2の扇型スラブ要素12の上面に形成されたリブ12b内には、PC鋼材が緊張力を付与された状態で配設されている。なお、差込用リブに複数のコッターを形成した場合、第1の扇型スラブ要素11と第2の扇型スラブ要素12をより強固に一体化することができる。
【0014】
図4は、図3に示す扇型無梁板スラブを使用してコンクリート合成スラブを構築した場合の縦断面図である。図に示すように以上のように構成された扇型無梁板スラブ10を柱13の周囲に形成したブラケット14に要部11aを載せ、拡開した先端部を窓側の柱15間に形成された梁16上に載せる。その後、上からコンクリート17を打設して合成スラブを構成する。
【0015】
図5は、本発明の扇型無梁板スラブの他の施工形態を示す平面図、図6は、図5に示す扇型無梁板スラブの組立手順を示す平面図である。本実施の形態において、大型スラブを計画する建物の隅部は1/4円形状に構成されており、柱18を中心として等距離に窓側の柱19が配設されている。このような構成において扇型無梁板スラブ20は、第1の扇型スラブ要素21と第2の扇型スラブ要素22とが段差部を介して一体化した扇型無梁板スラブであって、第1のスラブ要素21と第2のスラブ要素22とを一部重複して重ね合わせ、重ね合わせた部分に鉄筋を配筋し周囲からコンクリートを打設する。
【0016】
第1の扇型スラブ要素21は、第1の実施の形態とほぼ同様であるが、第2の扇型スラブ要素22は、拡開した先端部22aが円弧状に形成されている。
【0017】
以上のように構成した場合、扇型無梁板スラブ20は、構造物の隅部が1/4円形状に構成された際に、支えるための梁を設ける事無く柱18の周囲に形成したブラケット23と窓側の柱19間に架け渡した梁の間に差し渡すことができる。したがって、本実施の形態の扇型無梁板スラブ20によれば、段差床スラブを小梁なしで施工することができ、設計上の自由度を著しく向上することができる。
【0018】
【発明の効果】
この発明は上記した構成からなるので、以下に説明するような効果を奏することができる。
【0019】
請求項1に記載の発明では、板状の第1の扇型スラブ要素と板状部材の上面に複数のリブ形成された第2の扇型スラブ要素とが段差部を介して一体化した建物のコーナー部に使用する扇型無梁板スラブであって、前記第1のスラブ要素の先端部と前記第2のスラブ要素の基端部を重ね合わせると共に、前記第2の扇型スラブ要素の基端部側から突設された差込用リブと前記第1の扇型スラブ要素とを所定の空間を有して重ね合わせた部分に鉄筋を配筋し周囲からコンクリートを打設して一体化するので、構造物のコーナー部に梁や小梁無しに敷設することができ、自由な平面計画が可能である。また、高齢者や身体障害者等の利用者を配慮して、床段差をなくしたバリアーフリーの設計が容易となる。更に、段差部を鉄筋のみで補強した従来のものより、耐力的に優れている。
【0020】
また、請求項2に記載の発明によれば、前記差込用リブは、前記リブが延設されたものであり、内部にPC鋼材が緊張力を付与された状態で配設されているので抜け難くなり、より強固な結合が可能となる。したがって、従来に比べて大きな耐力を得ることができる。また、大型スラブを計画する建物の隅部において段差付きの床スラブを小梁なしで施工することができる。
【0021】
また、請求項3に記載の発明によれば、前記差込用リブは、複数のコッターが形成されたので、第1のスラブ要素と第2のスラブ要素との重ね合わせ部の結合を一層強固にすることができ、大スパンの床スラブに対応することができる。
【図面の簡単な説明】
【図1】図1は、本発明に係る扇型無梁板スラブによる施工例を示す平面図である。
【図2】図2は、同扇型無梁板スラブの組立手順を示す平面図である。
【図3】図3は、同扇型無梁板スラブの組立例を示す平面図である。
【図4】図4は、図3に示す扇型無梁板スラブを使用してコンクリート合成スラブを構築した場合の縦断面図である。
【図5】図5は、同扇型無梁板スラブの他の施工形態を示す平面図である。
【図6】図6は、図5に示す扇型無梁板スラブの組立手順を示す平面図である。
【図7】図7は、従来の構造建物のコーナー部における床スラブの組立て手順の一例を示す平面図である。
【符号の説明】
10 扇型無梁板スラブ
11 第1の扇型スラブ要素
11a 要部
11b 接合部
12 第2の扇型スラブ要素
12a 接合部
12b リブ
13 柱
14 ブラケット
15 柱
16 梁
17 コンクリート
18 柱
19 柱
20 扇型無梁板スラブ
21 第1の扇型スラブ要素
22 第2の扇型スラブ要素
23 ブラケット
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a fan-shaped non-beam plate slab which is a slab with a step having a step portion and can be laid without a beam or a small beam at a corner portion of a structure.
[0002]
[Prior art]
In general, a PC composite floor is a structure in which a precast PC plate and cast-in-place concrete are integrated to construct a concrete floor slab. In particular, a stepped PC plate is a floor with a difference in height of a building, such as a bathroom part. Used for. In recent years, in housing and public buildings, barrier-free design philosophy in which floor steps are eliminated in consideration of users such as the elderly and the physically disabled has become common. In the design of on-site concrete floors, if there is a partial height difference in the floor due to finishing, equipment piping, etc., in order to construct a floor slab low in advance, a small beam and a grandchild beam are provided. It was.
However, in this case, the construction is complicated, and there are cases where inconveniences in the design plan arise due to the provision of the small beams in a building where the floor height is severely restricted.
[0003]
FIG. 7 is a plan view showing an example of a procedure for assembling a floor slab at a corner portion of a conventional structural building. Here, when the floor slab 1 is laid at the corner of the structural building, the beams 2 and 3 are provided between the pillars 1A, 1B, and 1C, and the floor slab 1 is attached to the beams 2 and 3 and the beam 4 on the window side. It was built between five.
[0004]
[Problems to be solved by the invention]
However, when a floor slab structure is constructed using a conventional floor slab at the corner portion of the structural building, there is a drawback that the beams 2 and 3 must be provided between the pillar 1A, the pillar 1B, and the pillar 1C. Existed. In addition, in order to construct a step slab at the corner, a small beam and a grandchild beam were required.
[0005]
The present invention has been proposed in view of the above, and it is intended to provide a fan-shaped non-beam plate slab that does not require building a beam or a small beam between columns when building a floor slab at the corner of a structural building. Objective.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, the invention described in claim 1 includes a plate-shaped first fan-shaped slab element and a second fan-shaped slab element in which a plurality of ribs are formed on the upper surface of the plate-shaped member. A fan-shaped non-beam plate slab used for a corner portion of a building integrated through a stepped portion, and overlapping a distal end portion of the first slab element and a proximal end portion of the second slab element , Reinforcing bars are arranged in a portion where the insertion rib projecting from the base end side of the second fan-shaped slab element and the first fan-shaped slab element are overlapped with a predetermined space. It is characterized by placing concrete from the surroundings and integrating them.
[0007]
The invention according to claim 2 is characterized in that the insertion rib is formed by extending the rib, and the PC steel material is disposed in a state in which tension is applied. And
[0008]
The invention according to claim 3 is characterized in that the insertion rib is formed with a plurality of cotters .
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described in detail with reference to the drawings illustrating an embodiment. FIG. 1 is a plan view showing a construction example using a fan-shaped non-beam slab according to the present invention, FIG. 2 is a plan view showing an assembling procedure of the fan-shaped non-beam slab according to the present invention, and FIG. It is a top view which shows the example of an assembly of a non-beam board slab. Here, the fan-shaped non-beam slab 10 is a fan-shaped non-beam slab in which the first fan-shaped slab element 11 and the second fan-shaped slab element 12 are integrated through a step portion, The first slab element 11 and the second slab element 12 are partially overlapped and overlapped, and reinforcing bars are arranged in the overlapped portion, and concrete is cast from the surroundings to be integrated.
[0010]
The first slab element 11 has a substantially fan shape, the main part 11a is narrow, and is expanded toward the tip. Moreover, the junction part 11b which overlaps a part of 2nd fan-shaped slab element 12 is formed in the front-end | tip. In order to form a stepped portion in the overlapping portion of the first sector slab element 11 and the second sector slab element 12, the junction 12a of the second sector slab element 12 is placed on the junction 11b. Only the insertion rib is formed in the joint portion 12a, and a plurality of cotters may be formed on the insertion rib.
[0011]
The second slab element 12 is configured such that the proximal end portion is narrow and the distal end is expanded. The second fan-type slab element 12 is provided with a rib 12b continuous with the insertion rib, and a PC steel material is arranged inside the rib.
[0012]
After the first slab element 11 and the second slab element 12 configured as described above are overlapped so as to form a stepped portion at the joint 12a, reinforcing bars are arranged in the overlapped portion from the periphery. Place concrete and integrate. If a fan-shaped non-beam slab is constructed in this way, a floor slab with a step can be constructed without a small beam at the corner of a building where a large slab is planned.
[0013]
Moreover, in the rib 12b formed in the upper surface of the 2nd fan-shaped slab element 12, PC steel material is arrange | positioned in the state to which tension | tensile_strength was provided. When a plurality of cotters are formed on the insertion rib, the first sector slab element 11 and the second sector slab element 12 can be more firmly integrated.
[0014]
FIG. 4 is a longitudinal sectional view when a concrete composite slab is constructed using the fan-shaped non-beam slab shown in FIG. As shown in the figure, the main part 11a is placed on a bracket 14 in which the fan-shaped non-beam slab 10 configured as described above is formed around the pillar 13, and the expanded tip is formed between the pillars 15 on the window side. Place on the beam 16. Thereafter, concrete 17 is placed from above to form a composite slab.
[0015]
FIG. 5 is a plan view showing another construction form of the fan-shaped non-beam slab of the present invention, and FIG. 6 is a plan view showing an assembling procedure of the fan-shaped non-beam slab shown in FIG. In the present embodiment, the corner of the building where the large slab is planned is formed in a quarter circle shape, and the window-side pillars 19 are arranged at equal distances around the pillar 18. In such a configuration, the fan-shaped non-beam slab 20 is a fan-shaped non-beam slab in which a first fan-shaped slab element 21 and a second fan-shaped slab element 22 are integrated through a step portion. The first slab element 21 and the second slab element 22 are partially overlapped and overlapped, a reinforcing bar is placed in the overlapped portion, and concrete is placed from the periphery.
[0016]
The first fan-shaped slab element 21 is substantially the same as that of the first embodiment, but the second fan-shaped slab element 22 has a widened tip portion 22a formed in an arc shape.
[0017]
When configured as described above, the fan-shaped non-beam slab 20 is formed around the pillar 18 without providing a beam to support when the corner of the structure is formed in a quarter circle shape. It can be passed between the beam spanned between the bracket 23 and the column 19 on the window side. Therefore, according to the fan-shaped non-beam slab 20 of the present embodiment, the stepped floor slab can be constructed without a small beam, and the degree of freedom in design can be remarkably improved.
[0018]
【The invention's effect】
Since this invention consists of an above-described structure, there can exist an effect which is demonstrated below.
[0019]
In the first aspect of the present invention, the plate-shaped first fan-shaped slab element and the second fan-shaped slab element in which a plurality of ribs are formed on the upper surface of the plate-shaped member are integrated via the stepped portion. A fan-shaped non-beam slab for use in a corner portion of a building, wherein the second slab element is overlapped with a distal end portion of the first slab element and a base end portion of the second slab element. A reinforcing bar is placed in a portion where the insertion rib projecting from the base end side and the first fan-shaped slab element overlap each other with a predetermined space, and concrete is placed from the periphery. Since they are integrated, they can be laid at the corners of the structure without beams or small beams, and free plane planning is possible. In addition, in consideration of users such as the elderly and the physically handicapped, it becomes easy to design a barrier-free design with no floor steps. Furthermore, it is superior in terms of yield strength than the conventional one in which the stepped portion is reinforced only with reinforcing bars.
[0020]
According to the invention described in claim 2, the insertion rib is formed by extending the rib, and the PC steel material is disposed in a state in which tension is applied . It becomes difficult to come off and a stronger bond is possible. Therefore, a greater proof stress can be obtained compared to the conventional case. In addition, a floor slab with a step can be constructed without a beam at the corner of a building where a large slab is planned.
[0021]
According to the invention described in claim 3, since the insertion rib is formed with a plurality of cotters, the coupling of the overlapping portion of the first slab element and the second slab element is further strengthened. And can accommodate large span floor slabs.
[Brief description of the drawings]
FIG. 1 is a plan view showing a construction example using a fan-shaped non-beam slab according to the present invention.
FIG. 2 is a plan view showing a procedure for assembling the fan-shaped non-beam slab.
FIG. 3 is a plan view showing an assembly example of the fan-shaped non-beam slab.
FIG. 4 is a longitudinal sectional view when a concrete composite slab is constructed using the fan-shaped non-beam slab shown in FIG. 3;
FIG. 5 is a plan view showing another construction form of the fan-shaped non-beam slab.
6 is a plan view showing an assembling procedure of the fan-shaped non-beam plate slab shown in FIG. 5. FIG.
FIG. 7 is a plan view showing an example of a procedure for assembling a floor slab at a corner portion of a conventional structural building.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Fan type non-beam board slab 11 1st fan type slab element 11a Main part 11b Joint part 12 2nd fan type slab element 12a Joint part 12b Rib 13 Column 14 Bracket 15 Column 16 Beam 17 Concrete 18 Column 19 Column 20 Fan Dieless plate slab 21 first fan slab element 22 second fan slab element 23 bracket

Claims (3)

板状の第1の扇型スラブ要素と板状部材の上面に複数のリブ形成された第2の扇型スラブ要素とが段差部を介して一体化した建物のコーナー部に使用する扇型無梁板スラブであって、
前記第1のスラブ要素の先端部と前記第2のスラブ要素の基端部を重ね合わせると共に、前記第2の扇型スラブ要素の基端部側から突設された差込用リブと前記第1の扇型スラブ要素とを所定の空間を有して重ね合わせた部分に鉄筋を配筋し周囲からコンクリートを打設して一体化することを特徴とする扇型無梁板スラブ。
Sector type used in the corner of the building and the second fan-shaped slab elements in which a plurality of ribs on the upper surface of the plate-shaped first fan-shaped slab elements and the plate-like member is formed are integrated via a step portion Non-beam plate slab,
The top end of the first slab element and the base end of the second slab element are overlapped, and the insertion rib projecting from the base end of the second sector slab element and the first A fan-shaped non-beam plate slab , wherein a reinforcing bar is placed in a portion where one fan-shaped slab element is overlapped with a predetermined space, and concrete is cast from the surroundings to be integrated.
前記差込用リブは、前記リブが延設されたものであり、内部にPC鋼材が緊張力を付与された状態で配設されていることを特徴とする請求項1に記載の扇型無梁板スラブ。  2. The fan-shaped fan according to claim 1, wherein the insertion rib is formed by extending the rib, and the PC steel material is disposed in a state in which a tensile force is applied. Beam plate slab. 前記差込用リブは、複数のコッターが形成されたことを特徴とする請求項1または2に記載の扇型無梁板スラブ。  The fan-shaped non-beam slab according to claim 1 or 2, wherein the insertion rib is formed with a plurality of cotters.
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1833431B (en) * 2003-08-06 2013-02-13 罗伯特·博世有限公司 Image recording system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1833431B (en) * 2003-08-06 2013-02-13 罗伯特·博世有限公司 Image recording system

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