JP2016176212A - Foundation structure and foundation construction method - Google Patents

Foundation structure and foundation construction method Download PDF

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JP2016176212A
JP2016176212A JP2015055817A JP2015055817A JP2016176212A JP 2016176212 A JP2016176212 A JP 2016176212A JP 2015055817 A JP2015055817 A JP 2015055817A JP 2015055817 A JP2015055817 A JP 2015055817A JP 2016176212 A JP2016176212 A JP 2016176212A
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footing
foundation
foundation beam
pillar
constructed
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JP6611303B2 (en
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崇宏 待永
Takahiro Machinaga
崇宏 待永
和人 中平
Kazuto Nakahira
和人 中平
哲 日下
Satoru Kusaka
哲 日下
光 空久保
Hikaru Sorakubo
光 空久保
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Takenaka Komuten Co Ltd
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Takenaka Komuten Co Ltd
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Abstract

PROBLEM TO BE SOLVED: To provide a foundation structure and a foundation construction method, which facilitate placing of a reinforcement for a footing beam.SOLUTION: A foundation structure includes: a footing 10 that is provided on a pile head 12H of a pile 12; a column 14 that is supported by the footing 10; and a footing beam 16 that is supported by a top surface 10F of the footing 10 and in which a lower end 14D of the column 14 is embedded. The footing 10 assumes a rectangular shape in a plan view, and its diagonal line connecting corners with each other is directed in a material axis direction of the footing beam 16.SELECTED DRAWING: Figure 1

Description

本発明は、基礎構造及び基礎構築方法に関する。   The present invention relates to a foundation structure and a foundation construction method.

一般的な建物の基礎は、杭頭部にフーチングを構築し、フーチングに建物の基礎梁と柱を接合している。これにより、杭、柱及び基礎梁の確実な接合を図っている。
しかし、この構成では、フーチングと基礎梁の接合部において、フーチングの鉄筋と基礎梁の鉄筋が交差するため、鉄筋組みが容易ではない。 In general building foundations, footings are constructed on the pile heads, and the foundation beams and columns of the building are joined to the footings. Thereby, the reliable joining of a pile, a pillar, and a foundation beam is aimed at.
However, in this configuration, the reinforcing bar assembly is not easy because the reinforcing bar of the footing and the reinforcing bar of the foundation beam intersect at the joint between the footing and the foundation beam.

一方、特許文献１には、フーチングの高さ方向の下部に、フーチングの一部を構成するプレキャスト製のフーチング部材を設置し、フーチング部材に柱脚部を支持させた状態で、建物の上部構造の施工を開始する基礎の構築方法が記載されている。   On the other hand, in Patent Document 1, a precast footing member that constitutes a part of the footing is installed at the lower part in the height direction of the footing, and the column base is supported by the footing member. The foundation construction method to start construction is described.

特開２００１−３５５２４６号公報JP 2001-355246 A

しかし、特許文献１には、フーチングを、現場打ち鉄筋コンクリートで構築した場合における、フーチングの鉄筋と基礎梁の鉄筋の、鉄筋組みの困難さを解決する方法は示されていない。   However, Patent Document 1 does not disclose a method for solving the difficulty of rebar assembly between the reinforcing bar of the footing and the reinforcing bar of the foundation beam when the footing is constructed of on-site reinforced concrete.

本発明は、上記事実に鑑み、基礎梁の鉄筋の鉄筋組みを容易にする、基礎構造及び基礎構築方法を提供することを目的とする。   In view of the above facts, an object of the present invention is to provide a foundation structure and a foundation construction method for facilitating assembling of reinforcing bars of foundation beams.

請求項１に記載の発明に係る基礎構造は、杭頭部に設けられたフーチングと、前記フーチングで支持された柱と、前記フーチングの上面に支持され、前記柱の下端部を埋設させた基礎梁と、を有している。   The foundation structure which concerns on invention of Claim 1 is the foundation which was supported by the footing provided in the pile head, the pillar supported by the said footing, the upper surface of the said footing, and embedded the lower end part of the said pillar And a beam.

請求項１に記載の発明によれば、基礎梁が、フーチングの上面に支持されてフーチングの上に構築される。これにより、基礎梁の鉄筋をフーチングの上面で配筋できるため、鉄筋組みの作業が容易となる。
また、杭頭部に設けられたフーチングにより、柱が支持される。これにより、施工の早期段階でフーチングに建物の柱を支持させることで、建物の上部構造の施工を早めることができる。更に、柱の下端部が基礎梁に埋設されるので、柱、フーチング及び基礎梁の一体化が図れる。 According to the invention described in claim 1, the foundation beam is supported on the upper surface of the footing and is constructed on the footing. Thereby, since the reinforcement of the foundation beam can be arranged on the upper surface of the footing, the work of rebar assembly becomes easy.
Moreover, the pillar is supported by the footing provided in the pile head. Thereby, construction of the superstructure of a building can be accelerated by making the footing support the pillar of the building at an early stage of construction. Furthermore, since the lower end portion of the column is embedded in the foundation beam, the column, footing and foundation beam can be integrated.

請求項２に記載の発明は、請求項１に記載の基礎構造において、前記フーチングは平面視が矩形状とされ、角部を結ぶ対角線を前記基礎梁の材軸方向に向けている。   According to a second aspect of the present invention, in the foundation structure according to the first aspect, the footing has a rectangular shape in plan view, and a diagonal line connecting corners is directed in the material axis direction of the foundation beam.

これにより、フーチングの角部を、基礎梁の下に位置させることができるので、平面視において、基礎梁の接合部における基礎梁の側面からはみ出るフーチングの面積を少なくすることができる。
この結果、柱、フーチング及び基礎梁の接合強度を高めると共に、基礎部の施工性を向上させることができる。 Thereby, since the corner | angular part of a footing can be located under a foundation beam, the area of the footing which protrudes from the side surface of the foundation beam in the joint part of a foundation beam can be reduced in planar view.
As a result, it is possible to increase the joint strength of the columns, footings, and foundation beams and improve the workability of the foundation.

請求項３に記載の発明に係る基礎構築方法は、フーチングを杭頭部に設ける工程と、前記フーチングの上に柱を建てる工程と、前記フーチングの上面に基礎梁を構築し、前記柱の下端部を埋設させる工程と、を有している。   According to a third aspect of the present invention, there is provided a foundation construction method comprising: providing a footing on a pile head; constructing a pillar on the footing; constructing a foundation beam on an upper surface of the footing; And a step of burying the part.

請求項３に記載の発明によれば、先ず、杭頭部にフーチングが設けられる。
次に、フーチングの上に柱が建てられる。
次に、フーチングの上面に基礎梁の鉄筋が配筋され、基礎梁のコンクリートが打設される。このとき、柱の下端部は、基礎梁に埋設される。
本構築方法とすることにより、基礎梁の鉄筋をフーチングの上面で配筋できる。この結果、鉄筋組みの作業が容易となる。 According to invention of Claim 3, a footing is provided in a pile head first.
Next, a pillar is built on the footing.
Next, the reinforcement of the foundation beam is placed on the upper surface of the footing, and the concrete of the foundation beam is placed. At this time, the lower end portion of the column is embedded in the foundation beam.
By adopting this construction method, the reinforcement of the foundation beam can be arranged on the upper surface of the footing. As a result, the work of rebar assembly becomes easy.

本発明は、上記構成としてあるので、基礎梁の鉄筋の鉄筋組みを容易にする、基礎構造及び基礎構築方法を提供することができる。   Since the present invention is configured as described above, it is possible to provide a foundation structure and a foundation construction method that facilitate the reinforcement of the reinforcing bars of the foundation beam.

本発明の第１実施形態に係る基礎構造の基本構成を示す正面図である。It is a front view showing the basic composition of the foundation structure concerning a 1st embodiment of the present invention. （Ａ）は、図１のＺ１−Ｚ１線断面図であり、（Ｂ）は、図１のＺ２−Ｚ２線断面図である。(A) is the Z1-Z1 sectional view taken on the line of FIG. 1, (B) is the Z2-Z2 sectional view taken on the line of FIG. 本発明の第２実施形態に係る基礎構造の基本構成を示す図１のＺ２−Ｚ２線断面図である。It is Z2-Z2 sectional view taken on the line of FIG. 1 which shows the basic composition of the basic structure which concerns on 2nd Embodiment of this invention.

（第１実施形態）
本発明の第１実施形態に係る基礎構造について、図１〜図２（Ｂ）を用いて説明する。
ここで、図１は、基礎構造の正面図を示し、図２（Ａ）は図１のＺ１−Ｚ１線断面図を示し、（Ｂ）は図１のＺ２−Ｚ２線断面図を示している。 (First embodiment)
The basic structure according to the first embodiment of the present invention will be described with reference to FIGS.
Here, FIG. 1 shows a front view of the basic structure, FIG. 2 (A) shows a sectional view taken along line Z1-Z1 in FIG. 1, and (B) shows a sectional view taken along line Z2-Z2 in FIG. .

図１、図２（Ａ）、（Ｂ）に示すように、基礎構造は、現場打ち鉄筋コンクリート造のフーチング１０を有している。フーチング１０は、下端部に杭頭部１２Ｈを埋設させ、杭１２の上に構築されている。
また、フーチング１０は、平面視がＸ軸方向、Ｙ軸方向のいずれも幅Ｗ１の矩形状（正方形）とされ、成Ｈ１が幅Ｗ１よりも小さい、扁平形状に構築されている。 As shown in FIGS. 1, 2 (A), and 2 (B), the foundation structure has a footing 10 made of cast-in-place reinforced concrete. The footing 10 is constructed on the pile 12 by embedding a pile head 12 </ b> H at the lower end.
Further, the footing 10 is constructed in a flat shape in which the plan view is a rectangular shape (square) having a width W1 in both the X-axis direction and the Y-axis direction, and the height H1 is smaller than the width W1.

フーチング１０の上面１０Ｆには、図示しない建物の柱１４が建てられている。柱１４の下端部（底面）には、柱１４の断面寸法より大きな外形寸法で形成された、ベースプレート１８が接合されている。   A pillar 14 of a building (not shown) is built on the upper surface 10F of the footing 10. A base plate 18 having a larger outer dimension than the cross-sectional dimension of the column 14 is joined to the lower end (bottom surface) of the column 14.

フーチング１０の上面１０Ｆの中央部には、凹部３４が形成され、凹部３４の内部はモルタル２０で仕上げられ、モルタル２０の上にはベースプレート１８が載置されている。
ベースプレート１８は、上面をフーチング１０の上面１０Ｆと面一にして、フーチング１０に、図示しない固定手段で固定されている。凹部３４とベースプレート１８との隙間にはモルタル２０が充填され、フーチング１０の上面１０Ｆ及びベースプレート１８と同じ高さに仕上げられている。 A recess 34 is formed at the center of the upper surface 10 </ b> F of the footing 10. The interior of the recess 34 is finished with the mortar 20, and the base plate 18 is placed on the mortar 20.
The base plate 18 is fixed to the footing 10 by fixing means (not shown) with the upper surface being flush with the upper surface 10F of the footing 10. The gap between the recess 34 and the base plate 18 is filled with mortar 20 and finished to the same height as the upper surface 10F of the footing 10 and the base plate 18.

地面２４の上には、捨て打ちされたコンクリート層２２が設けられ、コンクリート層２２の上には、基礎梁１６、１７が構築されている。基礎梁１６、１７は、フーチング１０の上面で交差（直交）している。
基礎梁１６、１７の交差部の中央部には、柱１４が建てられており、柱１４の下端部１４Ｄは、基礎梁１６、１７に高さＨ２で埋設されている。 A discarded concrete layer 22 is provided on the ground 24, and foundation beams 16 and 17 are constructed on the concrete layer 22. The foundation beams 16 and 17 intersect (orthogonal) on the upper surface of the footing 10.
A pillar 14 is built at the center of the intersection of the foundation beams 16 and 17, and a lower end portion 14 </ b> D of the pillar 14 is embedded in the foundation beams 16 and 17 at a height H <b> 2.

基礎梁１６は、材軸Ｘ１をＸ軸方向に向け、フーチング１０の上面に基礎梁１６の底面を載せて、高さＨ２で構築されている。
基礎梁１６の主筋（鉄筋）２６は、Ｘ軸方向にフーチング１０の上面を通過させて配置され、主筋２６と交差する方向には、あばら筋（鉄筋）２８が設けられている。 The foundation beam 16 is constructed at a height H2 with the material axis X1 oriented in the X-axis direction and the bottom surface of the foundation beam 16 placed on the upper surface of the footing 10.
The main reinforcing bars (reinforcing bars) 26 of the foundation beam 16 are arranged so as to pass through the upper surface of the footing 10 in the X-axis direction.

基礎梁１７は、材軸Ｙ１をＹ軸方向に向け、フーチング１０の上面に基礎梁１７の底面を載せて、高さＨ２で構築されている。
基礎梁１７の主筋（鉄筋）２７は、Ｙ軸方向にフーチング１０の上面を通過させて配置され、主筋２７と交差する方向には、あばら筋（鉄筋）２９が設けられている。 The foundation beam 17 is constructed at a height H2 with the material axis Y1 oriented in the Y-axis direction and the bottom surface of the foundation beam 17 placed on the upper surface of the footing 10.
The main bars (reinforcing bars) 27 of the foundation beam 17 are arranged to pass through the upper surface of the footing 10 in the Y-axis direction, and in the direction intersecting with the main bars 27, the stirrup bars (reinforcing bars) 29 are provided.

このとき、フーチング１０は、基礎梁１６、１７の構築に先立って、杭１２の上に、基礎梁１６、１７とは別個に構築されている。
フーチング１０は、コ字状に曲げられた複数の主筋（鉄筋）３０を用いて配筋されている。即ち、主筋３０は、コ字状とされた中央部を、所定間隔でＸ軸方向及びＹ軸方向に向け、かつ、開口部側を上に向けて配筋されている。このとき、開口部側の上端部は、フーチング１０の上面から突出されている。 At this time, the footing 10 is constructed on the pile 12 separately from the foundation beams 16 and 17 prior to the construction of the foundation beams 16 and 17.
The footing 10 is arranged using a plurality of main bars (rebars) 30 bent in a U-shape. In other words, the main bars 30 are arranged with the center portion in a U-shape oriented at predetermined intervals in the X-axis direction and the Y-axis direction, and the opening side facing up. At this time, the upper end portion on the opening side protrudes from the upper surface of the footing 10.

主筋３０で囲まれた内部には、補強鉄筋３２が設けられている。
補強鉄筋３２は、Ｘ軸方向及びＹ軸方向に向けた鉄筋を、所定間隔で格子状に組み合わせ、平板状に形成されている。
補強鉄筋３２は、主筋３０のコ字状とされた中央部と、フーチング１０の上面１０Ｆとの間に、フーチング１０の上面１０Ｆに沿った方向に設けられ、外周部が、主筋３０のコ字状とされた立上げ部と接合されている。
これにより、柱１４の軸力を、フーチング１０を介して杭１２へ伝達する際の補強用として機能する。
主筋３０、補強鉄筋３２が配筋された後、コンクリートを打設して、フーチング１０が構築される。 A reinforcing steel bar 32 is provided inside the main bar 30.
The reinforcing reinforcing bars 32 are formed in a flat plate shape by combining reinforcing bars directed in the X-axis direction and the Y-axis direction in a lattice pattern at predetermined intervals.
The reinforcing reinforcing bar 32 is provided in a direction along the upper surface 10F of the footing 10 between the central portion of the main reinforcing rod 30 that is U-shaped and the upper surface 10F of the footing 10, and the outer peripheral portion is a U-shaped outer core. It is joined to the raised part made into a shape.
Thereby, it functions as an object for reinforcement when transmitting the axial force of the pillar 14 to the pile 12 via the footing 10.
After the main bars 30 and the reinforcing reinforcing bars 32 are arranged, the concrete is cast and the footing 10 is constructed.

本構成とすることにより、フーチング１０の上面で、基礎梁１６、１７の鉄筋組みを行う際に、フーチング１０自体は既に構築されているため、フーチング１０の上面１０Ｆにおいて、基礎梁１６、１７の主筋２６、２７、及びあばら筋２８、２９のみを配筋すればよく、基礎梁１６、１７の配筋が容易となる。   With this configuration, when reinforcing the base beams 16 and 17 on the upper surface of the footing 10, the footing 10 itself has already been constructed. Only the main bars 26 and 27 and the ribbed bars 28 and 29 need to be arranged, and the foundation beams 16 and 17 can be arranged easily.

即ち、フーチング１０の上面１０Ｆから、フーチング１０の主筋３０の先端が突出されているものの、基礎梁１６、１７の鉄筋組みを妨げる量ではなく、フーチング１０の主筋３０と、基礎梁１６、１７の鉄筋（主筋２６、２７とあばら筋２８、２９）の交差を最小限に抑えることができる。   That is, although the tip of the main bar 30 of the footing 10 protrudes from the upper surface 10F of the footing 10, it is not an amount that hinders the reinforcing bar assembly of the base beam 16, 17 but the main bar 30 of the footing 10 and the base beam 16, 17 Crossing of the reinforcing bars (the main bars 26 and 27 and the stirrup bars 28 and 29) can be minimized.

本実施形態とすることにより、基礎梁１６と基礎梁１７が、フーチング１０の上面１０Ｆに支持されて、フーチング１０の上に構築される。このとき、基礎梁１６の主筋２６及びあばら筋２８と、基礎梁１７の主筋２７及びあばら筋２９を、フーチング１０の上面１０Ｆで、フーチング１０の主筋３０に邪魔されることなく配筋できる。
即ち、フーチング１０の位置における鉄筋組みの作業が、フーチング１０の鉄筋に邪魔されることなく可能となり、従来のフーチングにおける鉄筋組みに比べ容易となる。 By setting it as this embodiment, the foundation beam 16 and the foundation beam 17 are supported by the upper surface 10F of the footing 10, and are constructed | assembled on the footing 10. FIG. At this time, the main bars 26 and the stirrups 28 of the foundation beam 16 and the main bars 27 and the stirrups 29 of the foundation beam 17 can be arranged on the upper surface 10F of the footing 10 without being obstructed by the main bars 30 of the footing 10.
That is, the rebar assembly work at the position of the footing 10 can be performed without being obstructed by the rebar of the footing 10 and is easier than the rebar assembly in the conventional footing.

また、杭頭部１２Ｈに設けられたフーチング１０により、柱１４が支持される。これにより、施工の早期段階で、フーチング１０に建物の柱１４を支持させることで、建物の上部構造の着手を早めることができる。
更に、柱１４の下端部１４Ｄが、基礎梁１６と基礎梁１７に埋設されるので、柱１４、フーチング１０及び基礎梁１６、１７の一体化が図れる。 Moreover, the pillar 14 is supported by the footing 10 provided in the pile head 12H. Thereby, it is possible to accelerate the start of the superstructure of the building by having the footing 10 support the pillar 14 of the building at an early stage of construction.
Furthermore, since the lower end portion 14D of the pillar 14 is embedded in the foundation beam 16 and the foundation beam 17, the pillar 14, the footing 10, and the foundation beams 16, 17 can be integrated.

このとき、フーチング１０は、幅Ｗ１よりも成Ｈ１が小さい扁平な形状とされているので、幅Ｗ１よりも成Ｈ１が大きい一般的なフーチングより、施工期間の短縮を図ることができる。
また、柱１４を、早期に建てることにより、建物の基礎梁１６、１７と上部構造部を、並行して構築することができ、建物の施工期間の短縮を図ることができる。 At this time, since the footing 10 has a flat shape having a width H1 smaller than the width W1, the construction period can be shortened compared to a general footing having a height H1 larger than the width W1.
Further, by building the column 14 at an early stage, the building foundation beams 16 and 17 and the upper structure portion can be constructed in parallel, and the construction period of the building can be shortened.

次に、基礎構築方法について説明する。
先ず、フーチング１０が、杭１２の上に杭頭部１２Ｈを埋設させて、現場打ち鉄筋コンクリートで構築される。
次に、フーチング１０の硬化を待って、フーチング１０の上に柱１４が建てられる。柱１４は、フーチング１０の上面１０Ｆの、中央部に形成された凹部３４に、下端部１４Ｄに接合されたベースプレート１８を載置して、固定手段で固定された後、凹部３４にモルタル２０が充填される。 Next, a basic construction method will be described.
First, the footing 10 is constructed of on-site reinforced concrete with a pile head 12H embedded on the pile 12.
Next, after the footing 10 is cured, the pillar 14 is built on the footing 10. The column 14 is mounted with the base plate 18 joined to the lower end portion 14D in the concave portion 34 formed in the central portion of the upper surface 10F of the footing 10 and fixed by fixing means, and then the mortar 20 is placed in the concave portion 34. Filled.

最後に、フーチング１０の上面１０Ｆで交差させて、基礎梁１６の主筋２６及びあばら筋２８が配筋され、基礎梁１７の主筋２７及びあばら筋２９が配筋される。
配筋後、コンクリートが打設され、基礎梁１６、１７が構築される。このとき、柱１４の下端部１４Ｄが、基礎梁１６、１７に埋め込まれる。 Finally, the main bars 26 and the stirrups 28 of the foundation beam 16 are arranged at the upper surface 10F of the footing 10, and the main bars 27 and the stirrups 29 of the foundation beam 17 are arranged.
After the bar arrangement, concrete is laid and the foundation beams 16, 17 are constructed. At this time, the lower end portion 14 </ b> D of the column 14 is embedded in the foundation beams 16 and 17.

本実施形態では、フーチング１０が扁平形状に構築される構成で説明した。しかし、これに限定されることはなく、上面１０Ｆで基礎梁１６、１７の底面を支持する構成であれば、扁平形状でなくてもよい。   In the present embodiment, the footing 10 is described as being configured in a flat shape. However, the present invention is not limited to this, and may not be a flat shape as long as the bottom surface of the foundation beams 16 and 17 is supported by the top surface 10F.

また、本実施形態では、フーチング１０は、現場打ち鉄筋コンクリートで構築される構成について説明した。しかし、これに限定されることはなく、上面１０Ｆで基礎梁１６、１７の底面を支持する構成であれば、施工現場以外の場所で予め製造された、プレキャスト部材（ＰＣ部材）であってもよい。   Moreover, in this embodiment, the footing 10 demonstrated the structure constructed | assembled with a cast-in-place reinforced concrete. However, the present invention is not limited to this, and even if it is a precast member (PC member) manufactured in advance at a place other than the construction site, as long as the bottom surface of the foundation beams 16 and 17 is supported by the upper surface 10F. Good.

また、本実施形態では、Ｘ軸方向に材軸を向けた基礎梁１６、及びＹ軸方向に材軸を向けた基礎梁１７が、いずれもフーチング１０の上で交差する構成について説明した。しかし、これに限定されることはなく、基礎梁が、Ｘ軸方向又はＹ軸方向のいずれか一方向へのみ、構築される構成でもよい。   Further, in the present embodiment, the configuration in which the foundation beam 16 with the material axis directed in the X-axis direction and the foundation beam 17 with the material axis oriented in the Y-axis direction both intersect on the footing 10 has been described. However, the present invention is not limited to this, and the foundation beam may be constructed only in one direction of the X-axis direction or the Y-axis direction.

（第２実施形態）
本発明の第２実施形態に係る基礎構造について、図３を用いて説明する。
図３は、図１のＺ２−Ｚ２線断面図を示している。
第２実施形態に係る基礎構造は、平面視において、フーチング４０の角部を結ぶ対角線Ｔ１、Ｔ２を、基礎梁１６、１７の材軸Ｘ１、Ｘ２の方向に向けている点において、第１実施形態と相違する。相違点を中心に説明する。 (Second Embodiment)
A basic structure according to a second embodiment of the present invention will be described with reference to FIG.
FIG. 3 shows a cross-sectional view taken along line Z2-Z2 of FIG.
The foundation structure according to the second embodiment is the first implementation in that the diagonal lines T1 and T2 connecting the corners of the footing 40 are directed in the direction of the material axes X1 and X2 of the foundation beams 16 and 17 in plan view. It differs from the form. The difference will be mainly described.

図３に示すように、フーチング４０は、平面視において、一辺の幅がＷ１の矩形状（正方形）とされている。フーチング４０は、角部３６Ａと角部３６Ｃを結ぶ一方の対角線Ｔ１を、基礎梁１６の材軸Ｘ１の方向に向けている。
また、角部３６Ｂと角部３６Ｄを結ぶ他方の対角線Ｔ２を、基礎梁１７の材軸Ｙ１の方向に向けて構築されている。 As shown in FIG. 3, the footing 40 has a rectangular shape (square) whose width on one side is W1 in plan view. The footing 40 has one diagonal line T1 connecting the corner portion 36A and the corner portion 36C directed in the direction of the material axis X1 of the foundation beam 16.
Further, the other diagonal line T2 connecting the corner portion 36B and the corner portion 36D is constructed in the direction of the material axis Y1 of the foundation beam 17.

フーチング４０は、フーチング１０と同様に、基礎梁１６、１７とは別個に、基礎梁１６、１７に先立って、主筋３０と補強鉄筋３２を配筋した後、コンクリートを打設して構築されている。フーチング４０の硬化を待って、基礎梁１６、１７が構築される。   Like the footing 10, the footing 40 is constructed by placing the main reinforcement 30 and the reinforcing reinforcing bar 32 prior to the foundation beams 16, 17, separately from the foundation beams 16, 17, and then placing concrete. Yes. The foundation beams 16 and 17 are constructed after the footing 40 is cured.

本実施形態では、フーチング４０は、フーチング４０の角部３６Ａと角部３６Ｃを結ぶ一方の対角線Ｔ１を、基礎梁１６の材軸Ｘ１の方向に向け、角部３６Ｂと角部３６Ｄを結ぶ他方の対角線Ｔ２を、基礎梁１７の材軸Ｙ１の方向に向けて構築されている。
これにより、フーチング４０の角部３６Ａと角部３６Ｃを、基礎梁１６の下に位置させ、角部３６Ｂと角部３６Ｄを、基礎梁１７の下に位置させることができる。 In the present embodiment, the footing 40 has one diagonal T1 connecting the corners 36A and 36C of the footing 40 directed in the direction of the material axis X1 of the foundation beam 16, and the other connecting the corners 36B and 36D. The diagonal line T2 is constructed in the direction of the material axis Y1 of the foundation beam 17.
Thereby, the corners 36A and 36C of the footing 40 can be positioned below the foundation beam 16, and the corners 36B and 36D can be positioned below the foundation beam 17.

この結果、基礎梁１６、１７の底面を支持するフーチング４０の面積を、フーチング４０の角部３６Ａと角部３６Ｃを結ぶ一方の対角線Ｔ１、及び角部３６Ｂと角部３６Ｄを結ぶ他方の対角線Ｔ２を、それぞれ基礎梁１６、１７の材軸Ｘ１、Ｙ１方向と交差させる場合に比べ、広く確保することができる。
この結果、フーチング４０、基礎梁１６、１７及び柱１４の接合強度を高くすることができる。 As a result, the area of the footing 40 that supports the bottom surfaces of the foundation beams 16 and 17 is divided into one diagonal T1 connecting the corner 36A and the corner 36C of the footing 40 and the other diagonal T2 connecting the corner 36B and the corner 36D. Can be ensured more widely than in the case of intersecting the material axes X1 and Y1 directions of the foundation beams 16 and 17, respectively.
As a result, the joint strength of the footing 40, the foundation beams 16, 17 and the column 14 can be increased.

また、平面視において、基礎梁１６、１７の交差部における、基礎梁１６、１７の側面からはみ出る、フーチング４０のはみ出し部の面積を少なくすることができ、基礎梁１６、１７の施工性を向上させることができる。
他の構成は、第１実施形態と同じであり説明は省略する。 Further, in plan view, the area of the protruding portion of the footing 40 that protrudes from the side surface of the foundation beam 16, 17 at the intersection of the foundation beams 16, 17 can be reduced, and the workability of the foundation beams 16, 17 is improved. Can be made.
Other configurations are the same as those of the first embodiment, and a description thereof will be omitted.

１０ フーチング
１０Ｆ フーチングの上面
１２ 杭
１２Ｈ 杭頭部
１４ 柱
１４Ｄ 柱の下端部
１６ 基礎梁
１７ 基礎梁
２６ 基礎梁の主筋（鉄筋）
２７ 基礎梁の主筋（鉄筋）
２８ 基礎梁の帯筋（鉄筋）
２９ 基礎梁の帯筋（鉄筋）
３０ フーチングの主筋（鉄筋）
３２ フーチングの帯筋（鉄筋）
Ｔ１、Ｔ２ 対角線
Ｘ１、Ｙ１ 材軸方向 DESCRIPTION OF SYMBOLS 10 Footing 10F Upper surface of footing 12 Pile 12H Pile head 14 Column 14D Bottom end of column 16 Foundation beam 17 Foundation beam
26 Main beam of the foundation beam (rebar)
27 Main beam of the foundation beam (rebar)
28 Foundation beam reinforcement (rebar)
29 Foundation beam reinforcement (rebar)
30 Footing main bar (rebar)
32 Footing band (rebar)
T1, T2 Diagonal line X1, Y1 Material axis direction

Claims (3)

杭頭部に設けられたフーチングと、
前記フーチングで支持された柱と、
前記フーチングの上面に支持され、前記柱の下端部を埋設させた基礎梁と、
を有する基礎構造。 Footing provided on the pile head,
A pillar supported by the footing;
A foundation beam supported on the upper surface of the footing and embedded in the lower end of the column;
Having a foundation structure. 前記フーチングは平面視が矩形状とされ、角部を結ぶ対角線を前記基礎梁の材軸方向に向けている請求項１に記載の基礎構造。   2. The foundation structure according to claim 1, wherein the footing has a rectangular shape in plan view, and a diagonal line connecting corner portions is directed in a material axis direction of the foundation beam. フーチングを杭頭部に設ける工程と、
前記フーチングの上に柱を建てる工程と、
前記フーチングの上面に基礎梁を構築し、前記柱の下端部を埋設させる工程と、
を有する基礎構築方法。 Providing a footing on the pile head;
Building a pillar on the footing;
Constructing a foundation beam on the upper surface of the footing and burying the lower end of the pillar;
A foundation construction method having
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2020169471A (en) * 2019-04-02 2020-10-15 株式会社竹中工務店 Foundation structure

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Publication number Priority date Publication date Assignee Title
JPS5063705U (en) * 1973-10-06 1975-06-10
JP2001140348A (en) * 1999-11-17 2001-05-22 Daiwa House Ind Co Ltd Structure of steel framed concrete foundation and column
JP2005068953A (en) * 2003-08-28 2005-03-17 Nippon Steel Corp Steel foundation structure
CN102839601A (en) * 2012-09-11 2012-12-26 天津市市政工程设计研究院 Fixed connection structure for steel pier column and cushion cap of portal rigid frame overbridge and construction method of fixed connection structure

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5063705U (en) * 1973-10-06 1975-06-10
JP2001140348A (en) * 1999-11-17 2001-05-22 Daiwa House Ind Co Ltd Structure of steel framed concrete foundation and column
JP2005068953A (en) * 2003-08-28 2005-03-17 Nippon Steel Corp Steel foundation structure
CN102839601A (en) * 2012-09-11 2012-12-26 天津市市政工程设计研究院 Fixed connection structure for steel pier column and cushion cap of portal rigid frame overbridge and construction method of fixed connection structure

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2020169471A (en) * 2019-04-02 2020-10-15 株式会社竹中工務店 Foundation structure
JP7284617B2 (en) 2019-04-02 2023-05-31 株式会社竹中工務店 foundation structure

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