JP2020084686A - Independent footing foundation structure and its construction method - Google Patents

Independent footing foundation structure and its construction method Download PDF

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JP2020084686A
JP2020084686A JP2018224085A JP2018224085A JP2020084686A JP 2020084686 A JP2020084686 A JP 2020084686A JP 2018224085 A JP2018224085 A JP 2018224085A JP 2018224085 A JP2018224085 A JP 2018224085A JP 2020084686 A JP2020084686 A JP 2020084686A
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steel
steel frame
concrete
foundation structure
frame assembly
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JP7068146B2 (en
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嵩広 藤井
Takahiro Fujii
嵩広 藤井
豪人 熊野
Toshihito Kumano
豪人 熊野
太志 大堀
Futoshi Ohori
太志 大堀
隆史 河野
Takashi Kono
隆史 河野
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Takenaka Komuten Co Ltd
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Abstract

To provide an independent footing foundation structure which dispenses with an installation work and a removal work of a frame mold for concrete, and can be simple and easily constructed, and its construction method.SOLUTION: There are provided: an independent footing foundation structure that includes a steel frame body 2 embedded and supported on concrete 9 on a supporting ground G and a column part 1 erected on the steel frame body 2, and transmits a load of a building transmitted from the column part 1 to the supporting ground G, in which a steel frame mold 5 for concrete embedding the steel frame body 2 is connected to the steel frame body 2 in a state of surrounding the outer periphery of the steel frame body 2, and the inside of the steel frame mold 5 is filled with the concrete 9 and the steel frame body 2 is embedded; and its construction method.SELECTED DRAWING: Figure 1

Description

本発明は、支持地盤の上でコンクリートに埋設されて支持される鉄骨組体と、その鉄骨組体の上に立設される柱部を備え、その柱部から伝達される建物の荷重を前記支持地盤へ伝達する独立フーチング基礎構造とその施工方法に関する。 The present invention includes a steel frame assembly that is embedded and supported in concrete on a support ground, and a column portion that is erected on the steel frame assembly, and the load of the building transmitted from the column portion is An independent footing foundation structure transmitted to a supporting ground and its construction method.

このような独立フーチング基礎構造では、従来、支持地盤を掘削して形成した根代内に鉄骨組体を設置し、コンクリート用の型枠を設置することなく、その根代の内部にコンクリートを打設して充填し、その充填したコンクリートに鉄骨組体を埋設して支持する構成が知られている（例えば、特許文献１参照）。 In such an independent footing foundation structure, conventionally, a steel frame structure is installed in the root area formed by excavating the support ground, and concrete is placed inside the root area without installing a formwork for concrete. There is known a structure in which a concrete structure is installed and filled, and a steel frame assembly is embedded and supported in the filled concrete (for example, refer to Patent Document 1).

特許第３６５８３３６号公報Japanese Patent No. 3658336

したがって、上記特許文献に記載の従来技術では、根代内に鉄骨組体を設置する関係上、余裕をみて鉄骨組体よりも大きな根代を掘削し、その大きな根代内にコンクリートを打設して充填することになり、必要以上に多量のコンクリートを使用することになる。
それを回避するには、根代内にコンクリート用の型枠を設置することが考えられるが、その場合、当然のことながら型枠の設置作業と撤去作業が必要となる。 Therefore, in the prior art described in the above patent document, in relation to installing the steel frame assembly in the root frame, a large root frame is excavated with a margin, and concrete is placed in the large root frame. Then, it will be filled up and more concrete will be used than necessary.
In order to avoid this, it is conceivable to install a formwork for concrete in the root, but in that case, of course, the work of installing and removing the formwork is required.

本発明は、このような従来の問題点に着目したもので、その目的は、コンクリート用の型枠の設置作業や撤去作業が不要で、簡単かつ容易に構築することが可能な独立フーチング基礎構造とその施工方法を提供することにある。 The present invention focuses on such conventional problems, and an object thereof is an independent footing foundation structure that can be simply and easily constructed without the need for installation or removal of a concrete formwork. And to provide the construction method.

本発明の第１特徴構成は、支持地盤の上でコンクリートに埋設されて支持される鉄骨組体と、その鉄骨組体の上に立設される柱部を備え、その柱部から伝達される建物の荷重を前記支持地盤へ伝達する独立フーチング基礎構造であって、前記鉄骨組体を埋設するコンクリート用の鋼製型枠が、その鉄骨組体の外周を囲う状態で当該鉄骨組体に接続されて設けられ、その鋼製型枠の内部にコンクリートが充填されて前記鉄骨組体が埋設される点にある。 A first characteristic configuration of the present invention includes a steel frame structure which is embedded and supported in concrete on a support ground, and a column part which is erected on the steel frame structure, and is transmitted from the column part. An independent footing foundation structure for transmitting a load of a building to the supporting ground, wherein a steel formwork for concrete in which the steel framework is embedded is connected to the steel framework in a state of surrounding the outer periphery of the steel framework. The steel frame is embedded in the steel form and the steel frame is embedded therein.

本構成によれば、鉄骨組体を埋設するコンクリート用の鋼製型枠が、鉄骨組体の外周を囲う状態で鉄骨組体に接続されて設けられ、その鋼製型枠の内部にコンクリートが充填されて鉄骨組体が埋設されるので、つまり、鋼製型枠を捨て型枠として使用して、コンクリートの充填により鉄骨組体を埋設することができるので、型枠の設置作業や撤去作業が不要で、しかも、使用するコンクリートの量は必要最小限に抑えることもでき、独立フーチング基礎構造を簡単かつ容易に構築することができる。 According to this configuration, the steel formwork for concrete in which the steel frame structure is embedded is provided so as to be connected to the steel frame structure so as to surround the outer periphery of the steel structure body, and the concrete is provided inside the steel frame structure. Since the steel framework is filled and the steel framework is buried, that is, the steel framework can be used as a discarding framework and the steel framework can be buried by filling the concrete, so the mold installation and removal work Is unnecessary, and the amount of concrete used can be suppressed to a necessary minimum, and an independent footing foundation structure can be easily and easily constructed.

本発明の第２特徴構成は、前記鋼製型枠が、前記鉄骨組体よりも下方に垂下する状態で設けられ、その鋼製型枠の垂下部間に亘ってワイヤーメッシュが張設されて、当該ワイヤーメッシュが、前記鋼製型枠の内部に充填のコンクリートに埋設される点にある。 According to a second characteristic configuration of the present invention, the steel mold is provided in a state of being hung below the steel frame assembly, and a wire mesh is stretched between hanging parts of the steel mold. The wire mesh is embedded in the concrete filled inside the steel mold.

本構成によれば、鋼製型枠が、鉄骨組体よりも下方に垂下する状態で設けられてコンクリートが充填されるので、建物の荷重が柱部から鉄骨組体に伝達されると、その鋼製型枠の垂下部に位置するコンクリートには、互いに離間しようとする力が作用する。その場合、その鋼製型枠の垂下部間に亘ってワイヤーメッシュが張設されるので、ワイヤーメッシュの引張力が離間しようとする垂下部間に有効に作用し、コンクリートによる鉄骨組体の支持が確実に維持される。
更に、そのワイヤーメッシュが、鋼製型枠の内部に充填のコンクリートに埋設されるので、コンクリートの引張場でのかぶり厚を適切に確保して、鋼製型枠の垂下部に位置するコンクリートの強度の向上を図ることができる。 According to this configuration, the steel formwork is provided so as to hang downward from the steel frame assembly and is filled with concrete, so that when the load of the building is transmitted from the column portion to the steel frame assembly, A force to separate from each other acts on the concrete located in the hanging portion of the steel form. In that case, since the wire mesh is stretched across the hanging parts of the steel form, the tensile force of the wire mesh effectively acts between the hanging parts that are trying to separate, and the steel frame structure is supported by the concrete. Is reliably maintained.
Furthermore, since the wire mesh is embedded in the concrete filled inside the steel formwork, the cover thickness in the tensile field of concrete is properly secured, and the concrete located in the hanging part of the steel formwork is secured. The strength can be improved.

本発明の第３特徴構成は、前記鉄骨組体の上下高さ位置を調整する複数の高さ調整手段が、前記鋼製型枠の下端部の外側に設けられる点にある。 A third characteristic configuration of the present invention is that a plurality of height adjusting means for adjusting the vertical height position of the steel frame assembly are provided outside the lower end portion of the steel mold.

本構成によれば、鉄骨組体の上下高さ位置を調整する複数の高さ調整手段が設けられるので、その複数の高さ調整手段により鉄骨組体の姿勢調整、言い換えると、鉄骨組体の上に立設される柱部の姿勢調整が可能となる。
そして、その複数の高さ調整手段が、鋼製型枠の下端部の外側に設けられるので、その高さ調整手段に起因するコンクリートの欠損もなく、鉄骨組体の所望どおりの支持が可能となる。 According to this configuration, since a plurality of height adjusting means for adjusting the vertical height position of the steel frame assembly is provided, the posture adjustment of the steel frame assembly by the plurality of height adjusting means, in other words, of the steel frame assembly. It is possible to adjust the posture of the pillar portion that is erected on the top.
Then, since the plurality of height adjusting means are provided outside the lower end of the steel form, there is no loss of concrete due to the height adjusting means, and it is possible to support the steel frame assembly as desired. Become.

本発明の第４特徴構成は、前記鉄骨組体が、複数の鉄骨部材により平面視で十字状に組み付け配置して構成され、それら鉄骨部材の端部が、平面視で矩形に構成された前記鋼製型枠の辺部分に接続される点にある。 A fourth characteristic configuration of the present invention is configured such that the steel frame assembly is assembled and arranged in a cross shape in plan view by a plurality of steel frame members, and end portions of the steel frame members are formed in a rectangular shape in plan view. It is connected to the side of the steel form.

本構成によれば、鉄骨組体が、複数の鉄骨部材により平面視で十字状に組み付け配置して構成されるので、複数の鉄骨部材によって強固で頑丈な鉄骨組体を構成することができる。そして、それら鉄骨部材の端部が、平面視で矩形に構成された鋼製型枠の辺部分に接続されるので、複数の鉄骨部材における鋼製型枠への接続端部の形状が比較的簡単な形状となり、作業の容易化を図ることができる。
特に、鉄骨組体を構成する鉄骨部材が鋼製型枠の辺部分にほぼ平行に配置される場合には、複数の鉄骨部材における鋼製型枠への接続端部の形状が更に簡単な形状となり、作業の容易化は一層顕著となる。 According to this configuration, since the steel frame assembly is configured by assembling and arranging the plurality of steel frame members in a cross shape in a plan view, a strong and sturdy steel frame assembly can be configured by the plurality of steel frame members. Then, since the ends of the steel frame members are connected to the side portions of the steel form frame configured in a rectangular shape in a plan view, the shapes of the connection end parts of the plurality of steel frame members to the steel form frame are relatively large. It has a simple shape and can facilitate the work.
Particularly, when the steel members constituting the steel frame assembly are arranged substantially parallel to the side portions of the steel formwork, the shape of the connection end portion of the plurality of steel frame members to the steel formwork is simpler. Therefore, the work becomes easier.

本発明の第５特徴構成は、独立フーチング基礎構造の施工方法であって、前記柱部が立設される前記鉄骨組体と前記鋼製型枠を前記支持地盤の上に設置する設置工程と、当該設置工程後において、前記高さ調整手段により前記柱部が所定の姿勢となるように前記鉄骨組体の姿勢を調整する姿勢調整工程と、当該姿勢調整工程後において、前記鋼製型枠の内部にコンクリートを打設して前記鉄骨組体を埋設するコンクリート打設工程と、を順次実行して構築する点にある。 A fifth characteristic configuration of the present invention is a method for constructing an independent footing foundation structure, comprising an installation step of installing the steel frame assembly on which the pillars are erected and the steel formwork on the support ground. After the installation step, a posture adjusting step of adjusting the posture of the steel frame body by the height adjusting means so that the pillar portion has a predetermined posture, and the steel formwork after the posture adjusting step. The concrete pouring step of pouring concrete inside and burying the steel frame assembly is sequentially executed.

本構成によれば、設置工程の実行によって、柱部が立設される鉄骨組体と鋼製型枠が、所定の位置に設置され、姿勢調整工程の実行によって、柱部が所定の姿勢になるように、鉄骨組体の姿勢が調整される。そして、コンクリート打設工程の実行によって、鉄骨組体がコンクリートに埋設されて所望する独立フーチング基礎構造が構築される。 According to this configuration, the steel frame assembly and the steel form frame on which the pillars are erected are installed at the predetermined positions by the execution of the installation step, and the pillars are brought into the predetermined posture by the execution of the attitude adjustment step. The posture of the steel frame assembly is adjusted so that Then, by executing the concrete placing step, the steel frame structure is embedded in the concrete to construct a desired independent footing foundation structure.

本発明の第６特徴構成は、前記コンクリート打設工程の実行時において、当該独立フーチング基礎構造の上に構築する土間またはスラブを構築するためのコンクリートを同時に打設する点にある。 A sixth characteristic configuration of the present invention is that, at the time of executing the concrete pouring step, concrete for pouring a soil or a slab to be built on the independent footing foundation structure is simultaneously poured.

本構成によれば、鋼製型枠の内部にコンクリートを打設するコンクリート打設工程の実行時に、予め姿勢調整工程によって柱部の姿勢の調整が完了した状態で、土間またはスラブを構築するためのコンクリートを同時に打設するので、コンクリートによる鉄骨組体の埋設と土間またはスラブの構築を同時に行うことができ、施工性の向上を図ることができる。 According to this configuration, when the concrete pouring process of pouring concrete into the steel formwork is executed, the soil or slab is constructed in the state in which the posture of the pillar has been adjusted in advance by the posture adjusting process. Since the above concrete is poured at the same time, it is possible to simultaneously bury the steel frame structure with the concrete and construct the earth or slab, thereby improving the workability.

第１実施形態の独立フーチング基礎構造を示す縦断正面図Front view in vertical section showing the independent footing basic structure of the first embodiment. 第１実施形態の独立フーチング基礎構造を示す一部切欠き平面図The partially notched top view which shows the independent footing basic structure of 1st Embodiment. 第２実施形態の独立フーチング基礎構造を示す縦断正面図Front view in vertical section showing the independent footing basic structure of the second embodiment. 第２実施形態の独立フーチング基礎構造を示す一部切欠き平面図The partially notched top view which shows the independent footing basic structure of 2nd Embodiment. 第３実施形態の独立フーチング基礎構造を示す縦断正面図Front view in vertical section showing the independent footing basic structure of the third embodiment. 第３実施形態の独立フーチング基礎構造を示す一部切欠き平面図The partially notched top view which shows the independent footing basic structure of 3rd Embodiment.

本発明による独立フーチング基礎構造とその施工方法の実施形態を図面に基づいて説明する。
本発明の独立フーチング基礎構造は、図１〜図６に示すように、支持地盤Ｇの上でコンクリート９に埋設されて支持される鉄骨組体２と、その鉄骨組体２の上に立設される柱部１を備え、その柱部１から伝達される建物の荷重を支持地盤Ｇへ伝達するものであり、以下、第１〜第３実施形態について説明する。 An embodiment of an independent footing foundation structure and its construction method according to the present invention will be described with reference to the drawings.
The independent footing foundation structure of the present invention, as shown in FIGS. 1 to 6, is provided with a steel frame body 2 which is embedded and supported in concrete 9 on a supporting ground G, and is erected on the steel frame body 2. The load of the building transmitted from the pillar portion 1 is transmitted to the supporting ground G, and the first to third embodiments will be described below.

（第１実施形態）
第１実施形態では、図１および図２に示すように、１本の地盤改良杭Ｐを打ち込んだ支持地盤Ｇの上に捨てコンクリートＣを介して設置されて建物の柱部１を支持する鉄骨組体２が、複数のＨ形鋼からなる鉄骨部材３、４により構成される。
複数の鉄骨部材３、４は、図２から明らかなように、平面視で十字状に組み付け配置されて互いに溶接され、場合によっては、その十字状の鉄骨組体２の中央に柱部１の下方脚部が溶接されて立設され、鉄骨組体２の外側には、平面視で正方形のコンクリート用の鋼製型枠５が、鉄骨組体２の外側を囲う状態に配設される。 (First embodiment)
In the first embodiment, as shown in FIGS. 1 and 2, a steel frame installed on a support ground G into which one ground improvement pile P has been driven and disposed via a concrete C to be discarded to support a pillar portion 1 of a building. The assembly 2 is composed of a plurality of steel frame members 3 and 4 made of H-shaped steel.
As is apparent from FIG. 2, the plurality of steel frame members 3 and 4 are assembled and arranged in a cross shape in a plan view and welded to each other. In some cases, the cross-shaped steel frame assembly 2 is provided with a pillar portion 1 at the center thereof. A lower leg portion is welded to stand upright, and a steel mold 5 for concrete, which is square in a plan view, is arranged outside the steel frame assembly 2 so as to surround the outside of the steel frame assembly 2.

鋼製型枠５は、鋼板を正方形に組み付けて構成され、鉄骨組体２を構成する鉄骨部材３、４が、その鋼製型枠５の辺部分にほぼ平行になるように配置され、各鉄骨部材３、４の端部が、鋼製型枠５の辺部分の内側に溶接される。
鋼製型枠５の上下方向高さは、その上端部が鉄骨組体２よりも上方にまで達し、その下端部が鉄骨組体２よりも下方にまで垂下する高さに設定され、鋼製型枠５の垂下部において、その内側の辺部分には、ワイヤーメッシュ６を支持する複数の支持部材７が溶接されて配置される。各支持部材７は、山形鋼で形成され、それら支持部材７の上にワイヤーメッシュ６が載置支持され、必要に応じて各支持部材７に溶接される。更に、鋼製型枠５の垂下部において、その外側の辺部分には、山形鋼８ａとその山形鋼８ａに螺合のボルト８ｂにより構成されて鉄骨組体２の上下高さ位置を調整する複数の高さ調整手段８が設けられる。
なお、ワイヤーメッシュ６を支持する支持部材７や高さ調整手段８の設置個数については、鉄骨組体２や鋼製型枠５の規模などに応じて適宜設定するものとする。 The steel form frame 5 is constructed by assembling steel plates in a square shape, and the steel frame members 3 and 4 forming the steel frame assembly 2 are arranged so as to be substantially parallel to the side portions of the steel form frame 5. The ends of the steel frame members 3 and 4 are welded to the inside of the side portions of the steel form frame 5.
The vertical height of the steel form 5 is set such that the upper end thereof reaches above the steel frame assembly 2 and the lower end thereof hangs down below the steel frame assembly 2. In the hanging portion of the form 5, a plurality of supporting members 7 that support the wire mesh 6 are welded and arranged on the inner side portions thereof. Each support member 7 is formed of chevron steel, the wire mesh 6 is placed and supported on the support members 7, and welded to each support member 7 as necessary. Further, in the hanging portion of the steel form 5, an outer side portion is formed by a chevron 8a and a bolt 8b screwed to the chevron 8a to adjust the vertical height position of the steel frame assembly 2. A plurality of height adjusting means 8 are provided.
The number of supporting members 7 supporting the wire mesh 6 and the height adjusting means 8 are appropriately set according to the scale of the steel frame assembly 2 and the steel form 5.

つぎに、第１実施形態による独立フーチング基礎構造の施工方法について説明する。
例えば、鉄骨組体２や鋼製型枠５などは、予め工場などで一体化された状態で作製されるものとし、場合によっては、鉄骨組体２の中央に柱部１の下方脚部が立設された状態で作製される。
いずれにせよ、柱部１が立設される鉄骨組体２と鋼製型枠５を支持地盤Ｇの地盤改良杭Ｐの上に捨てコンクリートＣを介して設置する設置工程を実行し、その後、柱部１が立設された状態で、高さ調整手段８により柱部１が所定の姿勢、例えば、鉛直姿勢となるように鉄骨組体２の姿勢を調整する姿勢調整工程を実行する。その後、鋼製型枠５の内部にコンクリート９を打設して鉄骨組体２を埋設するコンクリート打設工程を実行するのであり、このコンクリート打設工程の実行により、ワイヤーメッシュ６がコンクリート９に埋設されて、鋼製型枠５の下方垂下部間に亘って張設される。 Next, a method of constructing the independent footing foundation structure according to the first embodiment will be described.
For example, the steel frame assembly 2 and the steel frame 5 are assumed to be manufactured in an integrated state in a factory or the like in some cases. It is manufactured in an upright state.
In any case, the installation process is performed in which the steel frame assembly 2 on which the pillar portion 1 is erected and the steel form 5 are installed on the ground improvement pile P of the support ground G through the concrete C, and then, In a state in which the pillar portion 1 is erected, a height adjusting means 8 executes a posture adjusting step of adjusting the posture of the steel frame assembly 2 so that the pillar portion 1 has a predetermined posture, for example, a vertical posture. After that, the concrete placing step is performed in which the concrete 9 is placed inside the steel form 5 and the steel frame assembly 2 is embedded. By the execution of this concrete placing step, the wire mesh 6 is applied to the concrete 9. It is embedded and stretched over the lower hanging parts of the steel form 5.

なお、図１において仮想線で示すように、独立フーチング基礎構造の上に土間またはスラブ１０を構築する場合には、鋼製型枠５の内部にコンクリート９を打設するコンクリート打設工程の実行後に、土間またはスラブ１０を構築する別のコンクリート打設工程を実行することもできるが、鋼製型枠５の内部にコンクリート９を打設するコンクリート打設工程の実行時において、土間またはスラブ１０を構築するためのコンクリートを同時に打設することも可能である。
すなわち、鋼製型枠５の内部へのコンクリート打設工程の実行前に、予め鋼製型枠５の周囲を土で埋め、かつ、土間またはスラブ１０用の型枠を設けた状態で、鋼製型枠５の内部へのコンクリート打設工程の実行時において、土間またはスラブ１０を構築するためのコンクリートを同時に打設するのである。
その場合には、コンクリート打設工程の実行によって、独立フーチング基礎構造の構築と土間またはスラブ１０の構築を一挙に行うことができる。 As shown by the phantom line in FIG. 1, when constructing the soil floor or the slab 10 on the independent footing foundation structure, the concrete placing step of placing the concrete 9 inside the steel form 5 is executed. After that, another concrete placing step for constructing the soil or the slab 10 can be performed, but at the time of performing the concrete placing step for placing the concrete 9 inside the steel form 5, the soil or the slab 10 is executed. It is also possible to pour concrete for building at the same time.
That is, before performing the concrete pouring process into the inside of the steel form 5, the steel form 5 is preliminarily filled with soil, and a form for the soil or the slab 10 is provided. At the time of performing the concrete pouring step inside the mold making 5, concrete for constructing the soil or the slab 10 is simultaneously poured.
In that case, the construction of the independent footing foundation structure and the construction of the dirt floor or the slab 10 can be performed all at once by executing the concrete pouring process.

つぎに、第２と第３実施形態について説明するが、第１実施形態で説明した構成については同じ符号を付すことで説明を省略し、主として第１実施形態と異なる構成について説明する。
（第２実施形態）
第２実施形態では、図３および図４に示すように、複数の鉄骨部材３、４からなる鉄骨組体２が、２本の地盤改良杭Ｐを隣接して打ち込んだ支持地盤Ｇの上に設置される。なお、この第２実施形態は、地盤改良杭Ｐのない場合でも、平面形状に制限がある場合等に好適に適用することができる。
複数の鉄骨部材３、４は、図４から明らかなように、平面視において一方（地盤改良杭Ｐの並び方向）の鉄骨部材４が長くて他方の鉄骨部材３が短い十字状に組み付け配置されて溶接され、鉄骨組体２の外側に配設の鋼製型枠５は、平面視で長方形に構成される。
そして、十字状の鉄骨部材３、４は、第１実施形態と同様、鋼製型枠５の辺部分にほぼ平行になるように配置されて、その端部が鋼製型枠５の辺部分の内側に溶接される。
その他、ワイヤーメッシュ６、支持部材７、高さ調整手段８などについては、第１実施形態と特に変わるところはない。 Next, the second and third embodiments will be described, but the configurations described in the first embodiment will be omitted by giving the same reference numerals, and configurations that are different from the first embodiment will be mainly described.
(Second embodiment)
In the second embodiment, as shown in FIGS. 3 and 4, the steel frame assembly 2 including the plurality of steel frame members 3 and 4 is provided on the support ground G in which the two ground improvement piles P are adjacently driven. It is installed. The second embodiment can be suitably applied even when there is no ground improvement pile P and when the planar shape is limited.
As is apparent from FIG. 4, the plurality of steel frame members 3 and 4 are assembled and arranged in a cross shape in which one steel frame member 4 (longitudinal direction of the ground improvement pile P) is long and the other steel frame member 3 is short in a plan view. The steel form 5 which is welded together and is arranged outside the steel frame assembly 2 is formed in a rectangular shape in a plan view.
Then, the cross-shaped steel frame members 3 and 4 are arranged so as to be substantially parallel to the side portions of the steel mold 5 as in the first embodiment, and the ends thereof are the side portions of the steel mold 5. Be welded inside.
In addition, the wire mesh 6, the supporting member 7, the height adjusting means 8 and the like are not different from those in the first embodiment.

この第２実施形態による独立フーチング基礎構造の施工方法に関しても、第１実施形態と同様、鉄骨組体２と鋼製型枠５を支持地盤Ｇの上に設置する設置工程を実行し、その後、柱部１が立設された状態で、高さ調整手段８により柱部１が所定の姿勢となるように鉄骨組体２の姿勢を調整する姿勢調整工程を実行する。
そして、最後に、鋼製型枠５の内部にコンクリート９を打設して鉄骨組体２を埋設するコンクリート打設工程を実行して独立フーチング基礎構造を構築するのであり、図３において仮想線で示すように、土間またはスラブ１０を構築する場合には、コンクリート打設工程の実行時に、土間またはスラブ１０を構築するためのコンクリートを同時に打設することになる。 Regarding the method for constructing the independent footing foundation structure according to the second embodiment as well, similarly to the first embodiment, the installation process of installing the steel frame assembly 2 and the steel form 5 on the support ground G is executed, and thereafter, In a state in which the pillar portion 1 is erected, a posture adjusting step of adjusting the posture of the steel frame assembly 2 by the height adjusting means 8 so that the pillar portion 1 has a predetermined posture is executed.
Then, finally, a concrete placing step is performed by placing concrete 9 inside the steel form 5 and burying the steel frame assembly 2 to construct an independent footing foundation structure. As shown in, when constructing the soil or the slab 10, concrete for constructing the soil or the slab 10 is simultaneously placed when the concrete placing step is executed.

（第３実施形態）
第３実施形態では、図５および図６に示すように、鉄骨組体２が、２本の地盤改良杭Ｐを隣接して打ち込んだ支持地盤Ｇの上に設置され、複数の鉄骨部材３、４が、平面視において２つの十字状に組み付けられて、その２つの十字状が地盤改良杭Ｐの並び方向に並んだような形状に配置されて溶接される。
つまり、図６に示すように、比較的大きなＨ形鋼からなる鉄骨部材４が、地盤改良杭Ｐの並び方向に直線状に配置され、その鉄骨部材４に対して、比較的小さなＨ形鋼からなる２本の鉄骨部材３がそれぞれ十字状に組み付けられて鉄骨組体２が構成される。
その鉄骨組体２の外側に配設の鋼製型枠５は、図６から明らかなように、平面視で菱形が横方向（地盤改良杭Ｐの並び方向）に並列したような形状に構成され、鉄骨部材３、４の端部が鋼製型枠５の角部分の内側に溶接される。
その他の構成については、第１や第２実施形態と特に変わるところはない。 (Third Embodiment)
In the third embodiment, as shown in FIGS. 5 and 6, the steel frame assembly 2 is installed on a support ground G into which two ground improvement piles P have been driven adjacent to each other, and a plurality of steel frame members 3, 4 are assembled in two cross shapes in a plan view, and the two cross shapes are arranged and welded so as to be aligned in the direction in which the ground improvement piles P are arranged.
That is, as shown in FIG. 6, a steel frame member 4 made of a relatively large H-shaped steel is linearly arranged in the direction in which the ground improvement piles P are arranged, and the steel frame member 4 is relatively small with respect to the H-shaped steel. The two steel frame members 3 are assembled in a cross shape to form the steel frame assembly 2.
As is clear from FIG. 6, the steel form frame 5 arranged outside the steel frame assembly 2 is formed in a shape in which rhombuses are juxtaposed in the lateral direction (the direction in which the ground improvement piles P are arranged) in a plan view. Then, the ends of the steel members 3 and 4 are welded to the inside of the corners of the steel form 5.
Other configurations are the same as those in the first and second embodiments.

この第３実施形態による独立フーチング基礎構造の施工方法に関しても、第１や第２実施形態と同様、鉄骨組体２と鋼製型枠５を支持地盤Ｇの上に設置する設置工程、柱部１が立設された状態で、高さ調整手段８により柱部１が所定の姿勢となるように鉄骨組体２の姿勢を調整する姿勢調整工程、および、鋼製型枠５の内部にコンクリート９を打設して鉄骨組体２を埋設するコンクリート打設工程を順次実行して独立フーチング基礎構造を構築する。また、図５において仮想線で示すように、土間またはスラブ１０を構築する場合には、コンクリート打設工程の実行時に、土間またはスラブ１０を一緒に構築することになる。 As for the construction method of the independent footing foundation structure according to the third embodiment, as in the first and second embodiments, the installation process of installing the steel frame assembly 2 and the steel form 5 on the support ground G, the pillar portion. 1 in an upright state, a height adjusting means 8 adjusts the attitude of the steel frame assembly 2 so that the pillar 1 has a predetermined attitude, and concrete is placed inside the steel form frame 5. A concrete placing step of placing 9 and burying the steel frame assembly 2 is sequentially executed to build an independent footing foundation structure. Further, as shown by the phantom line in FIG. 5, when constructing the soil floor or the slab 10, the soil floor or the slab 10 is constructed together when the concrete placing step is executed.

〔別実施形態〕
（１）これまでの実施形態では、鋼製型枠５が、平面視において正方形、長方形、あるいは、菱形を２つ並べた形状など、主として矩形あるいは四角形に構成された例を示したが、例えば、平面視で円形や楕円形などに構成することもでき、鋼製型枠５の具体的な形状は、現場の状況などに応じて適宜変更可能である。 [Another embodiment]
(1) In the above embodiments, the steel form 5 is mainly configured in a rectangular shape or a square shape such as a square shape, a rectangular shape, or a shape in which two rhombuses are arranged in a plan view. It can also be configured in a circular shape or an elliptical shape in a plan view, and the specific shape of the steel mold 5 can be appropriately changed according to the situation of the site.

（２）これまでの実施形態では、ワイヤーメッシュ６が、山形鋼からなる支持部材７の上に載置支持された例を示したが、支持部材７を設けることなく、ワイヤーメッシュ６を鋼製型枠５の内側に溶接して実施することもできる。更に、ワイヤーメッシュ６に代えて複数本の鉄筋を先組みして構成型枠５の内側に取り付けて実施することもできる。
また、高さ調整手段８に関し、山形鋼８ａとボルト８ｂにより構成した例を示したが、その他、各種構成の高さ調整手段を採用することもでき、更に、この高さ調整手段８を設けることなく実施することも可能である。 (2) In the above embodiments, the wire mesh 6 is placed and supported on the support member 7 made of angle steel, but the wire mesh 6 is made of steel without the support member 7. It can also be carried out by welding inside the formwork 5. Further, instead of the wire mesh 6, a plurality of rebars may be assembled in advance and attached to the inside of the structural form 5 for implementation.
Further, regarding the height adjusting means 8, an example in which the angle steel 8a and the bolt 8b are used has been shown, but other height adjusting means having various configurations can be adopted, and further the height adjusting means 8 is provided. It is also possible to implement without.

（３）本発明に係る独立フーチング基礎構造とその施工方法は、直接基礎構造に限らず、杭基礎構造等の各種の基礎構造に適用することができ、特に、鉄骨基礎梁等の鋼製の基礎梁を柱部１の下方脚部等に接続して構成される基礎構造に好適に適用することができる。 (3) The independent footing foundation structure and its construction method according to the present invention can be applied not only to the direct foundation structure but also to various foundation structures such as a pile foundation structure. It can be suitably applied to a foundation structure configured by connecting a foundation beam to a lower leg portion of the pillar portion 1 or the like.

１ 柱部
２ 鉄骨組体
３、４ 鉄骨部材
５ 鋼製型枠
６ ワイヤーメッシュ
８ 高さ調整手段
９ コンクリート
１０ 土間またはスラブ
Ｇ 支持地盤 DESCRIPTION OF SYMBOLS 1 Column part 2 Steel frame assembly 3, 4 Steel frame member 5 Steel formwork 6 Wire mesh 8 Height adjusting means 9 Concrete 10 Soil or slab G Support ground

Claims (6)

支持地盤の上でコンクリートに埋設されて支持される鉄骨組体と、その鉄骨組体の上に立設される柱部を備え、その柱部から伝達される建物の荷重を前記支持地盤へ伝達する独立フーチング基礎構造であって、
前記鉄骨組体を埋設するコンクリート用の鋼製型枠が、その鉄骨組体の外周を囲う状態で当該鉄骨組体に接続されて設けられ、その鋼製型枠の内部にコンクリートが充填されて前記鉄骨組体が埋設される独立フーチング基礎構造。 It is equipped with a steel frame structure that is embedded and supported in concrete on the support ground, and a column part that stands upright on the steel frame structure, and transfers the load of the building transmitted from the column part to the support ground. It is an independent footing foundation structure that
A steel formwork for burying the steel framework is provided so as to be connected to the steel framework in a state of enclosing the outer periphery of the steel framework, and the inside of the steel framework is filled with concrete. An independent footing foundation structure in which the steel frame assembly is embedded. 前記鋼製型枠が、前記鉄骨組体よりも下方に垂下する状態で設けられ、その鋼製型枠の垂下部間に亘ってワイヤーメッシュが張設されて、当該ワイヤーメッシュが、前記鋼製型枠の内部に充填のコンクリートに埋設される請求項１に記載の独立フーチング基礎構造。 The steel form is provided in a state of hanging below the steel frame assembly, a wire mesh is stretched across the hanging parts of the steel form, and the wire mesh is made of the steel. The independent footing foundation structure according to claim 1, wherein the foundation structure is embedded in concrete filled inside the formwork. 前記鉄骨組体の上下高さ位置を調整する複数の高さ調整手段が、前記鋼製型枠の下端部の外側に設けられる請求項１または２に記載の独立フーチング基礎構造。 The independent footing foundation structure according to claim 1 or 2, wherein a plurality of height adjusting means for adjusting the vertical height position of the steel frame assembly is provided outside the lower end portion of the steel form. 前記鉄骨組体が、複数の鉄骨部材により平面視で十字状に組み付け配置して構成され、それら鉄骨部材の端部が、平面視で矩形に構成された前記鋼製型枠の辺部分に接続される請求項１〜３のいずれか１項に記載の独立フーチング基礎構造。 The steel frame assembly is configured by assembling and arranging a plurality of steel frame members in a cross shape in a plan view, and ends of the steel frame members are connected to side portions of the steel form frame configured in a rectangular shape in a plan view. The independent footing foundation structure according to any one of claims 1 to 3. 上記請求項３に記載の独立フーチング基礎構造の施工方法であって、
前記柱部が立設される前記鉄骨組体と前記鋼製型枠を前記支持地盤の上に設置する設置工程と、
当該設置工程後において、前記高さ調整手段により前記柱部が所定の姿勢となるように前記鉄骨組体の姿勢を調整する姿勢調整工程と、
当該姿勢調整工程後において、前記鋼製型枠の内部にコンクリートを打設して前記鉄骨組体を埋設するコンクリート打設工程と、
を順次実行して構築する独立フーチング基礎構造の施工方法。 A method for constructing an independent footing foundation structure according to claim 3,
An installation step of installing the steel frame assembly in which the pillar portion is erected and the steel formwork on the support ground,
After the installation step, an attitude adjusting step of adjusting the attitude of the steel frame assembly by the height adjusting means so that the pillar portion has a predetermined attitude,
After the attitude adjusting step, a concrete placing step of placing concrete inside the steel formwork to bury the steel frame assembly,
A method for constructing an independent footing foundation structure that is constructed by sequentially performing the steps. 前記コンクリート打設工程の実行時において、当該独立フーチング基礎構造の上に構築する土間またはスラブを構築するためのコンクリートを同時に打設する請求項５に記載の独立フーチング基礎構造の施工方法。 The method for constructing an independent footing foundation structure according to claim 5, wherein at the time of executing the concrete placing step, concrete for constructing a soil or a slab to be constructed on the independent footing foundation structure is simultaneously placed.
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CN112528490A (en) * 2020-12-08 2021-03-19 中国有色金属工业昆明勘察设计研究院有限公司 Method for calculating limit load of independent foundation in karst foundation
CN114232639A (en) * 2021-12-10 2022-03-25 中国一冶集团有限公司 Construction method for dismantling deep foundation pit support

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JP2017172308A (en) * 2016-03-27 2017-09-28 株式会社南条製作所 Integrated foundation and integrated foundation construction method

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JP2000144756A (en) * 1998-11-05 2000-05-26 Kumagai Gumi Co Ltd Preparation of foundation for building
JP2002309587A (en) * 2001-04-12 2002-10-23 Takeda Fukuyuki Independent foundation, method of constructing, it, and independent foundation structure
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CN112528490A (en) * 2020-12-08 2021-03-19 中国有色金属工业昆明勘察设计研究院有限公司 Method for calculating limit load of independent foundation in karst foundation
CN112528490B (en) * 2020-12-08 2023-02-28 中国有色金属工业昆明勘察设计研究院有限公司 Method for calculating limit load of independent foundation in karst foundation
CN114232639A (en) * 2021-12-10 2022-03-25 中国一冶集团有限公司 Construction method for dismantling deep foundation pit support
CN114232639B (en) * 2021-12-10 2023-08-25 中国一冶集团有限公司 Construction method for post-dismantling of deep foundation pit support

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