JP6749082B2 - Foundation structure and construction method of foundation structure - Google Patents
Foundation structure and construction method of foundation structure Download PDFInfo
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Description
本発明は、基礎構造及び基礎構造の施工方法に関する。 The present invention relates to a foundation structure and a method of constructing a foundation structure .
特許文献１には、対向する基礎梁間に基礎小梁が架設され、これら基礎梁および基礎小梁上に最下階（１階）の床スラブが支持されている基礎構造が開示されている。 Patent Document 1 discloses a basic structure in which a foundation beam is installed between opposing foundation beams, and a floor slab on the lowest floor (first floor) is supported on the foundation beam and the foundation beam.
特許文献１の基礎構造は、地盤に支持された基礎小梁が基礎梁間に並列配置された構造であり、基礎梁の上に小梁が架設された構造は開示されていない。 The basic structure of Patent Document 1 is a structure in which base beams supported by the ground are arranged in parallel between the base beams, and a structure in which the beam is installed on the base beams is not disclosed.
ここで、基礎大梁の上に鉄筋コンクリート造の小梁を架設した基礎構造は、コンクリート造の小梁の配筋や型枠の施工が必要であり、施工性の向上の観点から改善の余地があった。 Here, the basic structure in which a small beam made of reinforced concrete is erected on the large girder foundation requires the reinforcement of concrete small beams and construction of formwork, and there is room for improvement from the viewpoint of improving workability. It was
本発明は上記事実を鑑み、基礎大梁に小梁を架設する場合の施工性を向上することが目的である。 In view of the above facts, the present invention has an object to improve workability when a small girder is installed on a foundation girder.
第一態様の基礎構造は、地盤上に設けられた基礎大梁と、前記基礎大梁の上に架設された連続梁構造の鉄骨小梁と、前記鉄骨小梁の上に、コンクリートを打設して設けられたスラブと、を備えている。 The foundation structure of the first aspect, a foundation girder provided on the ground, a steel beam girder of a continuous beam structure erected on the foundation girder , and concrete is placed on the steel beam girder. And a slab provided .
第一態様の基礎構造では、基礎大梁の上に連続梁構造の鉄骨小梁を架設した構造とすることで、基礎大梁に架設する小梁が鉄筋コンクリート造の場合と比較し、配筋や型枠の施工が不要となるので、施工性が向上する。 In the basic structure of the first aspect, by constructing a steel beam of continuous beam structure on the foundation girder, the beam to be erected on the foundation girder is reinforced concrete structure compared to the case of reinforced concrete construction. Since the construction of is unnecessary, the workability is improved.
また、鉄骨小梁を連続梁構造とすることで、鉄骨小梁が単純梁構造の場合と比較し、梁中央部の応力を小さくできるので、鉄骨小梁の梁成を低くすることができる。よって、鉄骨小梁のコストが削減する。 Further, since the steel beam has a continuous beam structure, the stress in the central portion of the beam can be reduced as compared with the case where the steel beam has a simple beam structure, so that the beam formation of the steel beam can be reduced. Therefore, the cost of the steel beam is reduced.
第二態様の基礎構造は、前記鉄骨小梁は、ゲルバー梁とされている。 In the basic structure of the second aspect, the steel beam is a Gerber beam.
第二態様の基礎構造では、鉄骨小梁をゲルバー梁とすることで、曲げモーメントが伝達されないので、中央部の梁成を低くでき、この結果、鉄骨小梁のコストが削減する。 In the basic structure of the second aspect , since the bending moment is not transmitted by using the steel beam as a gel bar beam, the beam formation at the central portion can be lowered, and as a result, the cost of the steel beam is reduced.
第三態様の基礎構造は、前記基礎大梁は前記地盤上に並列に設けられ、前記鉄骨小梁は、両端部を構成し前記基礎大梁に接合された第一小梁と、前記第一小梁の間を構成する一又は複数の第二小梁と、を有している。 In the basic structure of the third aspect, the foundation girders are provided in parallel on the ground, and the steel beam girders constitute first end beams and are joined to the foundation girders, and the first girders. And one or a plurality of second beamlets that form the space between.
第三態様の基礎構造では、基礎大梁を並列に設けて鉄骨小梁の第一小梁を接合し、第二小梁を設ける前の状態の基礎大梁間を、例えば工事車両が移動できるので、施工性がよい。
第四態様の基礎構造の施工方法は、第三態様に記載の基礎構造の施工方法であって、前記鉄骨小梁の前記第一小梁を前記基礎大梁に接合する第一工程と、一部の前記第一小梁に前記第二小梁に接合する第二工程と、を有し、前記第二工程の後に、前記第二小梁を接合していない前記基礎大梁と前記基礎大梁との間を工事車両が移動する。
In the basic structure of the third aspect, the foundation girders are provided in parallel to join the first girders of the steel beam, and between the foundation girders in the state before the second girder is provided, for example, because the construction vehicle can move, Good workability.
A method of constructing a foundation structure according to a fourth aspect is the method of constructing a foundation structure according to the third aspect, wherein a first step of joining the first beamlets of the steel beam to the foundation beam, and a part A second step of joining the second beam to the first beam, and, after the second step, between the foundation girder and the foundation girder not joining the second beam Construction vehicles move between them.
本発明によれば、基礎大梁に小梁を架設する場合の施工性を向上することができる。 According to the present invention, it is possible to improve the workability when a small girder is installed on a foundation girder.
図１〜図４を用いて、本発明の一実施形態の基礎構造について説明する。なお、各図中の矢印Ｚは鉛直方向を示し、矢印Ｘは後述する小梁の梁方向を示し、矢印Ｙに後述する大梁の梁方向を示す。なお、Ｘ方向とＹ方向とは互いに直交している。 The basic structure of one embodiment of the present invention will be described with reference to FIGS. In addition, arrow Z in each figure shows the vertical direction, arrow X shows the beam direction of the small beam mentioned later, and arrow Y shows the beam direction of the large beam mentioned later. The X direction and the Y direction are orthogonal to each other.
＜構造＞
先ず、一実施形態の基礎構造１０が適用された建物１５の最下層部１６の構造について説明する。
<Structure>
First, the structure of the lowermost layer portion 16 of the building 15 to which the foundation structure 10 according to the embodiment is applied will be described.
図１（Ａ）及び図４に示すように、本実施形態の基礎構造１０が適用された建物１５の最下層部１６には、基礎大梁５０と鉄骨小梁７０とが設けられている。 As shown in FIGS. 1A and 4, a foundation girder 50 and a steel beam girder 70 are provided in the lowermost layer portion 16 of the building 15 to which the foundation structure 10 of the present embodiment is applied.
基礎大梁５０は、本実施形態では、鉄筋コンクリート造とされ、図１（Ａ）に示すように、地盤１２上にＹ方向に沿って設けられている。なお、基礎大梁５０内部には、図示されていないＹ方向に沿って配筋された梁主筋と、梁主筋の周りに配筋されたせん断補強筋とが埋設されている。また、図４に示すように、基礎大梁５０は、Ｘ方向に間隔をあけて並列に設けられている。 In the present embodiment, the foundation girder 50 is made of reinforced concrete, and is provided on the ground 12 along the Y direction, as shown in FIG. In addition, inside the main girder 50, there are embedded a main beam reinforcement, which is not shown in the figure, arranged along the Y direction and a shear reinforcement reinforcement arranged around the main beam. Further, as shown in FIG. 4, the foundation girders 50 are provided in parallel at intervals in the X direction.
図１（Ａ）に示すように、基礎大梁５０の上端部５２に、Ｘ方向に沿った鉄骨小梁７０が載せ掛けられて接合されている。なお、基礎大梁５０に埋設されたアンカー５４を介して鉄骨小梁７０が接合されている。また、図４に示すように、鉄骨小梁７０は、Ｙ方向に間隔をあけて並列に設けられている。 As shown in FIG. 1A, a steel beam 70 along the X direction is mounted and joined to the upper end portion 52 of the foundation girder 50. The steel beam 70 is joined via the anchor 54 embedded in the foundation girder 50. Further, as shown in FIG. 4, the steel frame joists 70 are provided in parallel at intervals in the Y direction.
図１（Ａ）に示すように、鉄骨小梁７０は、両端部を構成し基礎大梁５０に接合された第一小梁８０と、第一小梁８０と第一小梁８０との間に設けられた第二小梁９０と、で構成された連続梁とされている。更に、本実施形態の連続梁構造の鉄骨小梁７０は、第一小梁８０と第二小梁９０との接合部位が、計算上、曲げ応力が作用しない部位（図１（Ｂ）のＧ点）とされ、プレート材７２を介してボルト接合（ピン接合）したゲルバー梁である。また、鉄骨小梁７０を構成する第二小梁９０の梁成は、第一小梁８０の梁成よりも低い。そして、この鉄骨小梁７０の上にスラブ２０が設けられている。 As shown in FIG. 1(A), the steel beam 70 is between the first beam 80 and the first beam 80 and the first beam 80 that constitutes both ends and is joined to the foundation beam 50. The second beam 90 provided is a continuous beam. Further, in the steel beam 70 having the continuous beam structure of the present embodiment, the joint between the first beam 80 and the second beam 90 is a region where no bending stress is calculated (G in FIG. 1B). And the gel bar beam is bolted (pinned) through the plate member 72. Moreover, the beam formation of the second beam 90 which comprises the steel beam 70 is lower than the beam formation of the first beam 80. The slab 20 is provided on the steel beam 70.
なお、図１（Ａ）に示すように、本実施形態では、基礎大梁５０は、地盤１２上に打設された施工地盤１４の上に設けられている。また、本実施形態では、造成工事の施工地盤１４（すきとり底）に基礎大梁底を合わせ、床下を地下ピットとすることで埋戻し土をなくし、土工事コストの削減及び工期短縮を図っている。また、地下ピットは、設備のユーティリティールートやクールピットに有効利用される。 As shown in FIG. 1(A), in this embodiment, the foundation girder 50 is provided on the construction ground 14 cast on the ground 12. Further, in the present embodiment, the foundation large beam bottom is matched with the construction ground 14 (plow bottom) of the construction work, and the backfloor soil is eliminated by making the underground pit under the floor to reduce earthwork cost and shorten the construction period. There is. In addition, the underground pit is effectively used for the utility route and cool pit of the equipment.
（施工方法）
次に、本実施形態の施工方法の一例について説明する。
(Construction method)
Next, an example of the construction method of this embodiment will be described.
図２に示すように、基礎大梁５０を地盤１２上に並列に設置し、基礎大梁５０の上端部５２に、まず鉄骨小梁７０の第一小梁８０を接合する。図３に示すように、一部の鉄骨小梁７０には第二小梁９０を接合し、一部の鉄骨小梁７０には第二小梁９０を接合せずに後施工とする。 As shown in FIG. 2, the foundation girders 50 are installed in parallel on the ground 12, and the first beam 80 of the steel beam 70 is first joined to the upper end portion 52 of the foundation girder 50. As shown in FIG. 3, the second beam 90 is joined to a part of the steel beam 70, and the second beam 90 is not joined to a part of the steel beam 70 for post-construction.
そして、鉄骨小梁７０の第二小梁９０を接合していない基礎大梁５０と基礎大梁５０との間を工事車両１００が移動する。 Then, the construction vehicle 100 moves between the foundation girder 50 and the foundation girder 50 which are not joined to the second girder 90 of the steel frame girder 70.
＜作用及び効果＞
次に、本実施形態の作用及び効果について説明する。
<Action and effect>
Next, the operation and effect of this embodiment will be described.
基礎大梁５０の上に連続梁構造の鉄骨小梁７０を架設した構造とすることで、基礎大梁５０に架設する小梁が鉄筋コンクリート造の場合と比較し、配筋や型枠の施工が不要となるので、施工性が向上する。 By constructing a structure in which the steel beam 70 having a continuous beam structure is laid on the foundation girder 50, it is possible to eliminate the need for bar arrangement and formwork as compared with the case where the girder erected on the foundation girder 50 is made of reinforced concrete. Therefore, the workability is improved.
また、鉄骨小梁７０を連続梁構造とすることで、単純梁構造の場合と比較し、梁中央部の応力を小さくできる。また、鉄骨小梁７０の第二小梁９０は支点間が短い。したがって、鉄骨小梁７０の第二小梁９０の梁成を低くすることができる。よって、鉄骨小梁７０のコストが削減する。 Further, the steel beam 70 having a continuous beam structure can reduce the stress in the central portion of the beam as compared with the case of a simple beam structure. The second beam 90 of the steel beam 70 has a short fulcrum. Therefore, the beam formation of the second beam 90 of the steel beam 70 can be lowered. Therefore, the cost of the steel beam 70 is reduced.
更に、鉄骨小梁７０をゲルバー梁とすることで、曲げモーメントが伝達されないので、第二小梁９０の梁成を更に低くでき、この結果、鉄骨小梁７０のコストが更に削減する。 Further, since the bending moment is not transmitted by making the steel beam 70 a gel bar beam, the beam formation of the second beam 90 can be further reduced, and as a result, the cost of the steel beam 70 can be further reduced.
また、基礎大梁５０を並列に設けて鉄骨小梁７０の第一小梁８０を接合し、第二小梁９０を設ける前の状態の基礎大梁５０と基礎大梁５０との間を、工事車両１００が移動できるので、施工性がよい。 Further, the foundation girders 50 are provided in parallel to join the first girders 80 of the steel girder 70, and between the foundation girder 50 and the foundation girder 50 in a state before the second girder 90 is provided, the construction vehicle 100. Since it can be moved, workability is good.
＜その他＞
尚、本発明は上記実施形態に限定されない。
<Other>
The present invention is not limited to the above embodiment.
例えば、上記実施形態では、鉄骨小梁７０は、両端部を構成し基礎大梁５０に接合された第一小梁８０と、第一小梁８０と第一小梁８０との間に設けられた第二小梁９０と、で構成された連続梁構造とされているが、これに限定されない。第二小梁９０は複数であってもよいし、また、ゲルバー梁でなくてもよい。つまり、鉄骨小梁７０は連続梁構造であればよい。 For example, in the above-described embodiment, the steel beam 70 is provided between the first beam 80 and the first beam 80 and the first beam 80 that constitutes both ends and is joined to the foundation beam 50. The continuous beam structure is composed of the second beam 90, but is not limited to this. A plurality of the second beam 90 may be provided, and the second beam 90 may not be the gel bar beam. That is, the steel beam 70 may have a continuous beam structure.
また、例えば、上記実施形態では、基礎大梁５０は、鉄筋コンクリート造とされていたが、これに限定されない。基礎大梁５０は、鉄骨鉄筋コンクリート造であってもよいし、鉄骨造であってもよい、 Further, for example, in the above-described embodiment, the foundation girder 50 is made of reinforced concrete, but is not limited to this. The foundation girder 50 may be a steel-framed reinforced concrete structure or a steel-framed structure,
また、例えば、上記実施形態では、基礎大梁５０は並列配置されているが、これに限定されない。基礎大梁５０は格子状に配置されていてもよい。また、建物１５の最下層部１６の一部（例えば、工事車両１００の動線となる）領域のみ、基礎大梁５０が並列配置されていてもよい。 Further, for example, in the above embodiment, the foundation girders 50 are arranged in parallel, but the invention is not limited to this. The foundation girders 50 may be arranged in a grid pattern. Further, the foundation girders 50 may be arranged in parallel only in a part of the lowermost layer portion 16 of the building 15 (for example, serving as the flow line of the construction vehicle 100).
更に、本発明の要旨を逸脱しない範囲において種々なる態様で実施し得ることは言うまでもない Further, it goes without saying that the present invention can be implemented in various modes without departing from the scope of the present invention.
１２ 地盤
５０ 基礎大梁
７０ 鉄骨小梁
８０ 第一小梁
９０ 第二小梁
12 Ground 50 Foundation girder 70 Steel beam girder 80 First girder 90 Second girder
Claims (3)
前記基礎大梁の上に架設された連続梁構造の鉄骨小梁と、
前記鉄骨小梁の上に、コンクリートを打設して設けられたスラブと、
を備え、
前記基礎大梁は前記地盤上に並列に設けられ、
前記鉄骨小梁は、両端部を構成し前記基礎大梁に接合された第一小梁と、前記第一小梁の間を構成する一又は複数の第二小梁と、を有し、
前記第二小梁の梁成は、前記第一小梁の梁成よりも小さい、
基礎構造。 A foundation girder of reinforced concrete construction or steel frame reinforced concrete construction provided on the ground,
A steel beam having a continuous beam structure erected on the foundation beam,
On the steel beam, a slab provided by placing concrete,
Equipped with
The foundation girders are provided in parallel on the ground,
The steel beam has a first beam connected to the foundation beam, which constitutes both ends, and one or a plurality of second beam beams between the first beam, and
The beam formation of the second beam is smaller than the beam formation of the first beam.
Foundation structure.
請求項１の基礎構造。 The steel frame beam is a gel bar beam in which the first beam and the second beam are bolt-bonded via a plate material ,
The basic structure according to claim 1.
前記基礎大梁の上に架設された連続梁構造の鉄骨小梁と、 A steel beam having a continuous beam structure erected on the foundation beam,
前記鉄骨小梁の上に、コンクリートを打設して設けられたスラブと、 On the steel beam, a slab provided by placing concrete,
を備え、 Equipped with
前記基礎大梁は前記地盤上に並列に設けられ、 The foundation girders are provided in parallel on the ground,
前記鉄骨小梁は、両端部を構成し前記基礎大梁に接合された第一小梁と、前記第一小梁の間を構成する一又は複数の第二小梁と、を有している、 The steel beam has a first beam that constitutes both ends and is joined to the foundation beam, and one or a plurality of second beam beams that form between the first beam,
基礎構造の施工方法であって、 A method of constructing a foundation structure,
前記鉄骨小梁の前記第一小梁を前記基礎大梁に接合する第一工程と、 A first step of joining the first beam of the steel beam to the foundation beam;
一部の前記第一小梁に前記第二小梁に接合する第二工程と、 A second step of joining a part of the first beam to the second beam;
を有し、 Have
前記第二工程の後に、前記第二小梁を接合していない前記基礎大梁と前記基礎大梁との間を工事車両が移動する、 After the second step, a construction vehicle moves between the foundation girder and the foundation girder that do not join the second girder,
基礎構造の施工方法。 Construction method of foundation structure.
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