JP2004176299A - Floor slab structure with step - Google Patents

Floor slab structure with step Download PDF

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Publication number
JP2004176299A
JP2004176299A JP2002341068A JP2002341068A JP2004176299A JP 2004176299 A JP2004176299 A JP 2004176299A JP 2002341068 A JP2002341068 A JP 2002341068A JP 2002341068 A JP2002341068 A JP 2002341068A JP 2004176299 A JP2004176299 A JP 2004176299A
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JP
Japan
Prior art keywords
steel plate
floor slab
slab structure
truss
upper chord
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.)
Pending
Application number
JP2002341068A
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Japanese (ja)
Inventor
Masatoshi Harada
晶利 原田
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.)
JFE Metal Products and Engineering Inc
Original Assignee
JFE Metal Products and Engineering Inc
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 JFE Metal Products and Engineering Inc filed Critical JFE Metal Products and Engineering Inc
Priority to JP2002341068A priority Critical patent/JP2004176299A/en
Publication of JP2004176299A publication Critical patent/JP2004176299A/en
Pending legal-status Critical Current

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Abstract

<P>PROBLEM TO BE SOLVED: To solve a problem of a high construction cost due to much labor and time required in a conventional construction method wherein a step is formed at a floor slab by forming a mold at a site while surrounding a part to be stepped, arranging reinforcements inside a mold, and putting timbering under this part to support this part from below. <P>SOLUTION: This floor slab structure with the step is provided with adjacent floor slab structures different in installation heights; a connecting steel plate for connecting vicinities of ends of back faces of the adjacent floor slab structures; and a space holding member for connecting the vicinities of the ends of truss structures inside the adjacent floor slab structures. <P>COPYRIGHT: (C)2004,JPO

Description

【0001】
【発明の属する技術分野】
この発明は段差の有る床や天井を形成するための段差付き床スラブ構造体に関するものである。
【0002】
【従来の技術】
床や天井は、一般に、所定間隔をおいて設置した梁の上に床スラブ構造体を架け渡し、この床スラブ構造体の上から生コンクリートを打設し、この生コンクリートを硬化させる、という工法で形成されている。ここで、床スラブ構造体とは薄鋼板(デッキプレート)の上に鉄筋を縦横に配置して形成されたものをいう。
【0003】
ところで、床や天井は常に同一高さになっていることが望ましいが、種々の事情から、段差の形成が避けられない場合が有る。
【0004】
このような場合は、図8に示すように、段差が形成される部分に型を形成してその内部に鉄筋38を配置し、この部分の下に支保工(図示せず)を入れてこの部分を支え、この状態で生コンクリートを打設する工法によって段差が形成されている。
【0005】
型によって囲まれた部分は生コンクリートの硬化によって支持梁40となり、床や天井の端部を支えることになる。支保工は生コンクリートの硬化後、撤去する。
【0006】
【発明が解決しようとする課題】
ところで、この従来の工法により段差を形成する場合、建設現場において、段差になる部分を囲むようにして型を形成したり、型の内部に鉄筋を配置したり、この部分の下に支保工を入れてこの部分を下から支えるようにしなければならないので、人手と時間がかかり、建設コストが高くなるという問題があった。
【0007】
この発明は段差を形成するのに人手と時間ができるだけかからないようにした床スラブ構造体を提供することを目的とする。
【0008】
【課題を解決するための手段】
この発明に係る床スラブ構造体は、設置高さが相違する、隣り合う床スラブ構造体と、隣り合う該床スラブ構造体の裏面部の各端部近傍を連結する連結鋼板と、隣り合う該床スラブ構造体の内部のトラス構造体の各端部近傍を連結する間隔保持材とを備えたことを特徴とするものである。
【0009】
ここで、前記床スラブ構造体は、支持鋼板と、該支持鋼板の上方に該支持鋼板に略平行に設けられた上弦材と、該支持鋼板と該上弦材の間に該支持鋼板と略平行に設けられた下弦材と、該上弦材と該支持鋼板の間に途中を該下弦材で支持された状態で斜めに取り付けられたトラス部材とを備えている。
【0010】
また、前記連結鋼板は、前記支持鋼板に取り付けられる一対の取付部と、該取付部をつなぐ連結部とからなる断面略クランク状の鋼板からなり、前記トラス部材の下部が前記支持鋼板を介して該連結鋼板にボルト・ナットで固定され、一方の床スラブ構造体の上弦材の端部近傍と他方の床スラブ構造体の上弦材の端部近傍は前記間隔保持材を介して連結されている。
【0011】
前記連結鋼板の傾斜部の内部側には断面略ハット型の補強部材が開口部を内側に向けて取り付けられていてもよい。また、前記間隔保持材としては山形に折曲加工された孔あき鋼板又は三角断面の鉄筋トラスを用いてもよい。
【0012】
【発明の実施の形態】
図1はこの発明に係る段差付き床スラブ構造体の説明図、図2は図1の要部拡大図、図3は図2のA−A矢視図である。
【0013】
これらの図に示すように、段差付き床スラブ構造体10は、設置高さが相違する、隣り合う床スラブ構造体14,14と、隣り合う床スラブ構造体14,14の裏面部の各端部近傍を連結する連結鋼板16と、隣り合う床スラブ構造体14,14の内部のトラス構造体12の各端部近傍を連結する間隔保持材18とを備えている。
【0014】
床スラブ構造体14は、支持鋼板20と、支持鋼板20の上方に支持鋼板20に略平行に設けられた上弦材22と、支持鋼板20と上弦材22の間に支持鋼板20と略平行に設けられた下弦材24と、上弦材22と支持鋼板20の間に途中を下弦材24で支持された状態で斜めに取り付けられたトラス部材26とを備えている。
【0015】
連結鋼板16は、支持鋼板20に取り付けられる一対の取付部28,28と、取付部28,28をつなぐ連結部30とからなる断面略クランク状の鋼板からなる。
【0016】
トラス部材26の下部は、図4及び図5に示すように、支持鋼板20を介して連結鋼板16にボルト・ナット32で固定されている。
【0017】
一方の床スラブ構造体14の上弦材22の端部近傍と他方の床スラブ構造体14の上弦材22の端部近傍は間隔保持材18を介して連結されている。間隔保持材18としては、図6に示すような山形に折曲加工された孔あき鋼板を用いてもよいし、図7に示すような三角断面の鉄筋トラスを用いてもよい。
【0018】
連結鋼板16の傾斜部になっている連結部30の内部側には断面略ハット型の補強部材34がその開口部を内側に向けて取り付けられている。
【0019】
この段差付き床スラブ構造体は、建設現場で組み立て形成するか、工場で予め組み立て、これを現場に運んで設置する。
【0020】
そして、この段差付き床スラブ構造体を梁36の上に架け渡し、生コンクリートを打設した場合、段差部の下部に掛かる引張力は連結鋼板16によってトラス構造体12の下部に伝えられ、段差部の上部に掛かる圧縮力は間隔保持材18にトラス構造体12の上部に伝えられるので、段差部は支保工によって支えなくても生コンクリートの荷重が支えられることになる。
【0021】
また、コンクリートが打設され、硬化した後、補強部材34の開口部はコンクリートに食い込んだ状態になるので、連結鋼板16は補強部材34を介してコンクリートと一体化する。
【0022】
【発明の効果】
この発明によれば、一方の床スラブ構造体の鉄筋トラスと他方の床スラブ構造体の鉄筋トラスを連結鋼板と間隔保持材で一体的に連結しているので、段差が形成される連結部の強度が高まり、生コンクリートを打設する際に連結部を下方から支保工で支えなくて済み、支保工を設置するための人手と時間が不要になり、その分建設コストを低減することができるという効果がある。
【0023】
また、この発明によれば、連結鋼板がコンクリート型枠の働きをし、しかも連結鋼板に取り付けられた断面略ハット型の補強部材によりコンクリートと連結鋼板が一体化するので、連結鋼板はコンクリート硬化後、補強部材になり、連結部の強度を高めるという効果がある。
【0024】
また、この発明によれば、段差が付いた鉄筋トラスの間に該鉄筋トラスと直交する方向に間隔保持材を挿入し、固定するだけの作業で済むので、鉄筋トラスを使用した段差部分の配筋が容易になるという効果がある。
【0025】
また、この発明によれば、段差部を持った鉄筋トラスを工場で生産することができるので、安価な工業製品として供給することができるという効果がある。
【図面の簡単な説明】
【図1】この発明に係る段差付き床スラブ構造体の説明図である。
【図2】図1の要部拡大図である。
【図3】図2のA−A矢視図である。
【図4】トラスの足部の連結構造を示す斜視図である。
【図5】トラスの足部の連結構造を示す側面図である。
【図6】間隔保持材の一例の説明図である。
【図7】間隔保持材の他の例の説明図である。
【図8】従来の工法により形成された段差の有る床スラブの段差部の説明図である。
【符号の説明】
10 段差付き床スラブ構造体
12 トラス構造体
14 床スラブ構造体
16 連結鋼板
18 間隔保持材
20 支持鋼板
22 上弦材
24 下弦材
26 トラス部材
28 取付部
30 連結部
32 ボルト・ナット
34 補強部材
36 梁
[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a stepped floor slab structure for forming a floor or a ceiling having a step.
[0002]
[Prior art]
Floors and ceilings are generally constructed by spanning a floor slab structure on beams installed at predetermined intervals, pouring ready-mixed concrete from above the floor slab structure, and curing the ready-mixed concrete. Is formed. Here, the floor slab structure refers to a structure formed by arranging reinforcing bars vertically and horizontally on a thin steel plate (deck plate).
[0003]
By the way, it is desirable that the floor and ceiling are always at the same height, but there are cases where formation of steps is inevitable due to various circumstances.
[0004]
In such a case, as shown in FIG. 8, a mold is formed in a portion where a step is formed, a reinforcing bar 38 is disposed inside the mold, and a support (not shown) is inserted below this portion to form a mold. A step is formed by the method of supporting the portion and pouring ready-mixed concrete in this state.
[0005]
The portion surrounded by the mold becomes the support beam 40 due to the hardening of the ready-mixed concrete, and supports the ends of the floor and ceiling. Shoring is to be removed after hardening of ready-mixed concrete.
[0006]
[Problems to be solved by the invention]
By the way, when a step is formed by this conventional method, at a construction site, a mold is formed so as to surround a portion to be a step, a reinforcing bar is arranged inside the mold, and a support is inserted under this portion. Since this part must be supported from below, there is a problem that it takes time and labor, and construction costs increase.
[0007]
SUMMARY OF THE INVENTION It is an object of the present invention to provide a floor slab structure in which a step and a step need as little labor and time as possible.
[0008]
[Means for Solving the Problems]
The floor slab structure according to the present invention has different installation heights, adjacent floor slab structures, and a connecting steel plate that connects the vicinity of each end of the back surface of the adjacent floor slab structure, And a spacing member for connecting the vicinity of each end of the truss structure inside the floor slab structure.
[0009]
Here, the floor slab structure includes a supporting steel plate, an upper chord material provided substantially parallel to the supporting steel plate above the supporting steel plate, and a substantially parallel to the supporting steel plate between the supporting steel plate and the upper chord material. And a truss member diagonally attached between the upper chord and the supporting steel plate while being supported by the lower chord in the middle.
[0010]
Further, the connecting steel plate is formed of a steel plate having a substantially crank-shaped cross section including a pair of mounting portions mounted on the supporting steel plate and a connecting portion connecting the mounting portions, and a lower portion of the truss member is provided via the supporting steel plate. The vicinity of the end of the upper chord of one floor slab structure and the vicinity of the end of the upper chord of the other floor slab structure are connected to the connecting steel plate with bolts and nuts via the spacing member. .
[0011]
A reinforcing member having a substantially hat-shaped cross section may be attached to the inside of the inclined portion of the connecting steel plate with the opening facing inward. Further, as the spacing member, a perforated steel plate bent into a mountain shape or a reinforced truss having a triangular cross section may be used.
[0012]
BEST MODE FOR CARRYING OUT THE INVENTION
FIG. 1 is an explanatory view of a stepped floor slab structure according to the present invention, FIG. 2 is an enlarged view of a main part of FIG. 1, and FIG. 3 is a view taken on line AA of FIG.
[0013]
As shown in these figures, the stepped floor slab structure 10 has adjacent floor slab structures 14, 14 having different installation heights, and each end of the back surface of the adjacent floor slab structures 14, 14. A connecting steel plate 16 for connecting the vicinity of the truss structure 12 and a spacing member 18 for connecting the vicinity of each end of the truss structure 12 inside the adjacent floor slab structures 14 and 14 are provided.
[0014]
The floor slab structure 14 includes a supporting steel plate 20, an upper chord member 22 provided above the supporting steel plate 20 substantially in parallel with the supporting steel plate 20, and a substantially parallel to the supporting steel plate 20 between the supporting steel plate 20 and the upper chord member 22. A lower chord member 24 is provided, and a truss member 26 is installed diagonally between the upper chord member 22 and the supporting steel plate 20 while being supported by the lower chord member 24 in the middle.
[0015]
The connecting steel plate 16 is formed of a steel plate having a substantially crank-shaped cross section and including a pair of mounting portions 28 and 28 mounted on the supporting steel plate 20 and a connecting portion 30 connecting the mounting portions 28 and 28.
[0016]
4 and 5, the lower portion of the truss member 26 is fixed to the connecting steel plate 16 with bolts and nuts 32 via the supporting steel plate 20.
[0017]
The vicinity of the end of the upper chord member 22 of one floor slab structure 14 and the vicinity of the end of the upper chord member 22 of the other floor slab structure 14 are connected via a spacing member 18. As the spacing member 18, a perforated steel plate bent into a mountain shape as shown in FIG. 6 or a reinforced truss having a triangular cross section as shown in FIG. 7 may be used.
[0018]
A reinforcing member 34 having a substantially hat-shaped cross section is attached to the inside of the connecting portion 30 which is an inclined portion of the connecting steel plate 16 with its opening facing inward.
[0019]
This stepped floor slab structure is assembled and formed at a construction site or assembled in advance at a factory, and is transported to the site and installed.
[0020]
When the stepped floor slab structure is bridged over the beam 36 and the ready-mixed concrete is poured, the tensile force applied to the lower portion of the step portion is transmitted to the lower portion of the truss structure 12 by the connecting steel plate 16, Since the compressive force applied to the upper portion of the portion is transmitted to the upper portion of the truss structure 12 to the spacing member 18, the load of the ready-mixed concrete is supported without supporting the step portion by the support.
[0021]
After the concrete is cast and hardened, the opening of the reinforcing member 34 is cut into the concrete, so that the connection steel plate 16 is integrated with the concrete via the reinforcing member 34.
[0022]
【The invention's effect】
According to the present invention, since the reinforcing steel truss of the one floor slab structure and the reinforcing steel truss of the other floor slab structure are integrally connected by the connecting steel plate and the spacing member, the connecting portion having the step is formed. The strength is increased, and the connecting part does not have to be supported by a support from below when casting ready-mixed concrete, so that manpower and time for installing the support are unnecessary, and the construction cost can be reduced accordingly. This has the effect.
[0023]
Further, according to the present invention, since the connecting steel plate functions as a concrete formwork, and the concrete and the connecting steel plate are integrated by the reinforcing member having a substantially hat-shaped cross section attached to the connecting steel plate, the connecting steel plate is hardened after concrete hardening. This serves as a reinforcing member and has the effect of increasing the strength of the connecting portion.
[0024]
Further, according to the present invention, it is only necessary to insert the spacing member between the stepped truss truss and the direction perpendicular to the reinforced truss and fix it, so that the stepped portion using the reinforced truss can be arranged. This has the effect of facilitating streaks.
[0025]
Further, according to the present invention, since a reinforced truss having a stepped portion can be produced at a factory, there is an effect that it can be supplied as an inexpensive industrial product.
[Brief description of the drawings]
FIG. 1 is an explanatory view of a stepped floor slab structure according to the present invention.
FIG. 2 is an enlarged view of a main part of FIG.
FIG. 3 is a view as viewed in the direction of arrows AA in FIG. 2;
FIG. 4 is a perspective view showing a connection structure of a foot portion of the truss.
FIG. 5 is a side view showing a connection structure of a foot portion of the truss.
FIG. 6 is an explanatory diagram of an example of a spacing material.
FIG. 7 is an explanatory diagram of another example of the spacing member.
FIG. 8 is an explanatory view of a step portion of a floor slab having a step formed by a conventional method.
[Explanation of symbols]
Reference Signs List 10 stepped floor slab structure 12 truss structure 14 floor slab structure 16 connecting steel plate 18 spacing member 20 supporting steel plate 22 upper chord material 24 lower chord material 26 truss member 28 attachment part 30 connection part 32 bolt / nut 34 reinforcing member 36 beam

Claims (4)

設置高さが相違する、隣り合う床スラブ構造体と、隣り合う該床スラブ構造体の裏面部の各端部近傍を連結する連結鋼板と、隣り合う該床スラブ構造体の内部のトラス構造体の各端部近傍を連結する間隔保持材とを備えたことを特徴とする段差付き床スラブ構造体。Adjacent floor slab structures having different installation heights, a connecting steel plate for connecting the vicinity of each end of the back surface of the adjacent floor slab structure, and a truss structure inside the adjacent floor slab structure And a spacing member for connecting the vicinity of each end of the floor slab structure. 前記床スラブ構造体は、支持鋼板と、該支持鋼板の上方に該支持鋼板に略平行に設けられた上弦材と、該支持鋼板と該上弦材の間に該支持鋼板と略平行に設けられた下弦材と、該上弦材と該支持鋼板の間に途中を該下弦材で支持された状態で斜めに取り付けられたトラス部材とを備え、前記連結鋼板は、前記支持鋼板に取り付けられる一対の取付部と、該取付部をつなぐ連結部とからなる断面略クランク状の鋼板からなり、前記トラス部材の下部が前記支持鋼板を介して該連結鋼板にボルト・ナットで固定され、一方の床スラブ構造体の上弦材の端部近傍と他方の床スラブ構造体の上弦材の端部近傍は前記間隔保持材を介して連結されていることを特徴とする請求項1に記載の段差付き床スラブ構造体。The floor slab structure is provided with a support steel plate, an upper chord material provided substantially parallel to the support steel plate above the support steel plate, and provided substantially parallel to the support steel plate between the support steel plate and the upper chord material. Lower chord material, and a truss member that is obliquely mounted between the upper chord material and the support steel plate while being supported by the lower chord material in the middle, wherein the connection steel plate is a pair of truss members attached to the support steel plate. One of the floor slabs is formed of a steel plate having a substantially crank-shaped cross section including a mounting portion and a connecting portion connecting the mounting portion, and a lower portion of the truss member is fixed to the connecting steel plate with bolts and nuts via the supporting steel plate. The stepped floor slab according to claim 1, wherein the vicinity of the end of the upper chord of the structure and the vicinity of the end of the upper chord of the other floor slab structure are connected via the spacing member. Structure. 前記連結鋼板の傾斜部の内部側には断面略ハット型の補強部材が開口部を内側に向けて取り付けられていることを特徴とする請求項1又は2に記載の段差付き床スラブ構造体。3. The stepped floor slab structure according to claim 1, wherein a reinforcing member having a substantially hat-shaped cross section is attached to an inner side of the inclined portion of the connection steel plate with an opening facing inward. 4. 前記間隔保持材が山形に折曲加工された孔あき鋼板又は三角断面の鉄筋トラスからなることを特徴とする請求項1〜3のいずれかに記載の段差付き床スラブ構造体。The stepped floor slab structure according to any one of claims 1 to 3, wherein the spacing member is formed of a perforated steel plate or a reinforced truss having a triangular cross section, which is bent into a mountain shape.
JP2002341068A 2002-11-25 2002-11-25 Floor slab structure with step Pending JP2004176299A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008045375A (en) * 2006-08-21 2008-02-28 Jfe Metal Products & Engineering Inc Breadthwise step height construction method of deck plate with reinforcement truss
JP2016089360A (en) * 2014-10-30 2016-05-23 株式会社竹中工務店 Building foundation structure and construction method for the same
CN113445651A (en) * 2020-03-24 2021-09-28 多维联合集团有限公司 Assembled building carrier plate and assembled building carrier plate subassembly

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008045375A (en) * 2006-08-21 2008-02-28 Jfe Metal Products & Engineering Inc Breadthwise step height construction method of deck plate with reinforcement truss
JP2016089360A (en) * 2014-10-30 2016-05-23 株式会社竹中工務店 Building foundation structure and construction method for the same
CN113445651A (en) * 2020-03-24 2021-09-28 多维联合集团有限公司 Assembled building carrier plate and assembled building carrier plate subassembly

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