JP6449080B2

JP6449080B2 - Building

Info

Publication number: JP6449080B2
Application number: JP2015066843A
Authority: JP
Inventors: 輝久甲田; 伊藤　彰; 彰伊藤; 由西成田; 平野　秀和; 秀和平野; 裕一平田; 健治田野; 小田　稔; 稔小田; 覚貫洞; 翔太中野; 絵里高橋
Original assignee: Sumitomo Mitsui Construction Co Ltd
Current assignee: Sumitomo Mitsui Construction Co Ltd
Priority date: 2015-03-27
Filing date: 2015-03-27
Publication date: 2019-01-09
Anticipated expiration: 2035-03-27
Also published as: JP2016186186A

Description

本発明は、地中に埋設されてなる複数の鉄筋コンクリート製の基礎杭と、該複数の基礎杭に支持される鉄筋コンクリート製の基礎梁と、を備えた建築物に関する。 The present invention relates to a building including a plurality of reinforced concrete foundation piles embedded in the ground and a reinforced concrete foundation beam supported by the plurality of foundation piles.

従来、基礎杭や基礎梁を備えた建築物については種々の構造のものが提案されている（例えば、特許文献１及び２参照）。 Conventionally, the thing of various structures is proposed about the building provided with the foundation pile and the foundation beam (for example, refer to patent documents 1 and 2).

図２（ａ）は、建築物の従来構造の一例を示す側面図であり、同図（ｂ）は、そのＲ−Ｒ断面図である。これらの図中の符号１２は、地中に埋設されてなる複数の鉄筋コンクリート製の基礎杭を示し、符号１３は、該複数の基礎杭１２の上端（杭頭）に接合される鉄筋コンクリート製の基礎梁を示している。そして、この基礎梁１３は、同図（ｂ）に例示するように、断面が略矩形となるように形成されていた。 Fig.2 (a) is a side view which shows an example of the conventional structure of a building, The figure (b) is the RR sectional drawing. Reference numeral 12 in these drawings denotes a plurality of reinforced concrete foundation piles embedded in the ground, and reference numeral 13 denotes a reinforced concrete foundation joined to the upper ends (pile heads) of the plurality of foundation piles 12. Shows the beam. And this foundation beam 13 was formed so that a cross section may become a substantially rectangular shape so that it may illustrate in the figure (b).

特開２００５−１３９７３１号公報JP 2005-139731 A 特開２０１２−１０７４４３号公報JP 2012-107443 A

ところで、前記基礎梁１３の幅寸法Ｗ_１３は、該基礎梁１３に作用する応力の条件だけによって規定されるものではなく、幾何学的な条件によっても規定されるものである。すなわち、該基礎梁１３には前記基礎杭１２の側の杭主筋Ｄが挿通（埋設）されるため、該基礎梁１３の側の梁主筋Ｅの離間間隔（つまり、一の梁主筋Ｅと他の梁主筋Ｅとの間の間隙）は該杭主筋Ｄが挿通されるに足る寸法である必要があり、該梁主筋Ｅの数が増えれば増えるほど前記基礎梁１３の幅寸法Ｗ_１３は大きくなってしまう。その場合は、前記応力の条件を既に満足しているにもかかわらず、前記幾何学的な条件を満たすだけのために前記基礎梁１３の幅寸法Ｗ_１３を必要以上に大きくしなければならず、その分、コンクリートの使用量が増えてしまうという問題があった。また、該基礎梁１３の幅寸法Ｗ_１３を出来るだけ小さくした場合には、前記杭主筋Ｄと前記梁主筋Ｅとが干渉するかしないかのギリギリの条件で前記基礎梁１３を前記杭頭に載置しなければならず、その載置作業（具体的には、前記梁主筋Ｅの間隙に前記杭主筋Ｄを挿通させる作業）に時間が掛かってしまうという問題も生じていた。さらに、施工段階で前記基礎杭１２が正規の位置からズレてしまっていると、前記杭主筋Ｄと前記梁主筋Ｅとの干渉が起こりやすくなり、該基礎梁１３の設置作業にはさらに時間が掛かってしまうという問題があった。 Incidentally, the width W ₁₃ of the base beam 13 is not intended to be defined only by the terms of the stress acting on the footing beams 13, which is defined by the geometric conditions. That is, since the pile main reinforcement D on the side of the foundation pile 12 is inserted (embedded) in the foundation beam 13, the spacing between the beam reinforcements E on the side of the foundation beam 13 (that is, one beam principal reinforcement E and the other The gap between the main beam E of the base beam 13 and the main beam E is required to be large enough to allow the pile main bar D to be inserted, and the width W ₁₃ of the foundation beam 13 increases as the number of the main beam E increases. turn into. In that case, despite which satisfies the condition of the stress already must be unnecessarily large width W ₁₃ of the base beam 13 only for the geometric conditions are satisfied There was a problem that the amount of concrete used increased accordingly. Also, when minimizing the width W ₁₃ of the footing beams 13, the foundation beam 13 to the pile head in the pile main reinforcement D and the beam main reinforcement of marginal conditions E and are not to interfere There is also a problem that it takes time for the placement work (specifically, the work for inserting the pile main reinforcement D through the gap between the beam main reinforcements E). Further, if the foundation pile 12 is displaced from the normal position at the construction stage, the pile main reinforcement D and the beam main reinforcement E are likely to interfere with each other, and it takes more time to install the foundation beam 13. There was a problem of hanging.

本発明は、上述の問題を解消することのできる建築物を提供することを目的とするものである。 The object of the present invention is to provide a building that can solve the above-mentioned problems.

請求項１に係る発明は、図１（ａ）〜（ｃ）に例示するものであって、地中に埋設されてなる複数の鉄筋コンクリート製の基礎杭（２）と、該複数の基礎杭（２）に支持される鉄筋コンクリート製の基礎梁（３）と、を備えた建築物（１）において、
該基礎梁（３）の下端を含む部分（３ａ）を“基礎梁下端部”とし、該基礎梁（３）における該基礎梁下端部（３ａ）の上側の部分であって該基礎梁（３）の高さ方向（ｚ）の中央部（３ｂ_１，３ｂ_２）を“基礎梁中央部”とした場合に、
該基礎梁下端部（３ａ）及び該基礎梁中央部（３ｂ_１，３ｂ_２）で形成される部分の断面形状が略逆Ｔ字状となるように、該基礎梁下端部（３ａ）の短手方向（ｙ）の幅（Ｗ_３ａ）が該基礎梁中央部（３ｂ_１，３ｂ_２）の短手方向（ｙ）の幅（Ｗ_３ｂ）より大きくなるように設定され、
該基礎梁下端部は、該基礎梁の長手方向全体に亘って、短手方向に同じ幅を有しており、
前記基礎杭（２）の杭主筋（Ｄ）の少なくとも一部は、該基礎梁下端部（３ａ）の部分であって前記基礎梁中央部（３ｂ_１，３ｂ_２）よりも出っ張った部分に埋設されるように配置されたことを特徴とする。 The invention according to claim 1 is illustrated in FIGS. 1A to 1C, and includes a plurality of reinforced concrete foundation piles (2) embedded in the ground, and the plurality of foundation piles ( In a building (1) comprising a reinforced concrete foundation beam (3) supported by 2),
A portion (3a) including the lower end of the foundation beam (3) is referred to as a “foundation beam lower end portion”, and is the upper portion of the foundation beam lower end portion (3a) in the foundation beam (3). ) In the height direction (z) (3b ₁ , 3b ₂ ) as the “foundation beam center”
The lower end of the foundation beam (3a) is short so that the cross-sectional shape of the portion formed by the lower end part (3a) of the foundation beam and the center part (3b ₁ , 3b ₂ ) of the foundation beam is substantially inverted T-shaped. The width (W _3a ) in the hand direction (y) is set to be larger than the width (W _3b ) in the short direction (y) of the center portion (3b ₁ , 3b ₂ ) of the foundation beam,
The lower end portion of the foundation beam has the same width in the lateral direction over the entire longitudinal direction of the foundation beam,
At least a part of the pile main reinforcement (D) of the foundation pile (2) is embedded in a portion of the foundation beam lower end (3a) and protruding from the foundation beam central portion (3b ₁ , 3b ₂ ). It is characterized by having been arranged.

請求項２に係る発明は、請求項１に係る発明において、前記基礎梁下端部（３ａ）の短手方向（ｙ）の幅（Ｗ_３ａ）を、前記基礎杭（２）の幅（Ｗ_２）と同等以上としたことを特徴とする。 The invention according to claim 2 is the invention according to claim 1, wherein the foundation beam the lower end width of the lateral direction (y) of (3a) and _{(W 3a),} said base width of piles (2) _{(W 2} ) Or more.

請求項３に係る発明は、請求項１又は２に係る発明において、前記基礎梁下端部（３ａ）を含む部分又は前記基礎梁（３）の全体が、プレキャスト工法又は現場打ちにより作成されることを特徴とする。 The invention according to claim 3 is the invention according to claim 1 or 2, wherein the part including the lower end portion (3a) of the foundation beam or the whole of the foundation beam (3) is created by a precast method or on-site driving. It is characterized by.

請求項４に係る発明は、請求項１乃至３のいずれか１項に記載の発明において、前記基礎梁（３）の部分であって前記基礎杭（２）によって支持される部分（３Ａ）を“支持部”とした場合に、
隣接する２つの前記支持部（３Ａ，３Ａ）の間の中央部（符号３Ｂ参照。以下、“長手方向中央部”とする）の梁せい（Ｈ_３Ｂ）は、該支持部（３Ａ）の部分の梁せい（Ｈ_３Ａ）よりも小さく設定されてなることを特徴とする。 The invention according to claim 4 is the invention according to any one of claims 1 to 3, wherein a portion (3A) that is a portion of the foundation beam (3) and is supported by the foundation pile (2). In the case of “support”,
The beam part (H _3B ) of the central part (see reference numeral 3B, hereinafter referred to as “longitudinal central part”) between the two adjacent support parts (3A, 3A) is a part of the support part (3A). It is characterized by being set to be smaller than that of the beam (H _3A ).

請求項５に係る発明は、請求項４に記載の発明において、前記長手方向中央部（３Ｂ）の上側には、現場打ちで形成される部分（符号４参照。以下、“現場打ち部”とする）が配置され、
該現場打ち部（４）には、該現場打ち部（４）を前記短手方向（ｙ）に沿って貫通する貫通孔（４ａ，４ｂ，４ｃ）が形成されてなることを特徴とする。 According to a fifth aspect of the present invention, in the invention of the fourth aspect, on the upper side of the longitudinal central portion (3B), a portion formed by spotting (see reference numeral 4; hereinafter referred to as “spotting part”). Be placed)
The spot hitting portion (4) is formed with through holes (4a, 4b, 4c) penetrating the spot hitting portion (4) along the short direction (y).

なお、括弧内の番号などは、図面における対応する要素を示す便宜的なものであり、従って、本記述は図面上の記載に限定拘束されるものではない。 Note that the numbers in parentheses are for the sake of convenience indicating the corresponding elements in the drawings, and therefore the present description is not limited to the descriptions on the drawings.

請求項１乃至３に係る発明によれば、前記基礎梁下端部の短手方向の幅が前記基礎梁中央部の短手方向の幅よりも大きくなるように設定されるので、該基礎梁中央部の短手方向の幅を必要以上に大きくしなくて良くなり、基礎梁の断面を略矩形状とする場合に比べてコンクリートの使用量を低減することができる。また、前記基礎梁の梁主筋の離間間隔（つまり、一の梁主筋と他の梁主筋との間の間隙）を大きく取ることができ、前記杭主筋と前記梁主筋とが干渉するおそれを低減して、前記基礎梁の設置作業の効率化を図ることができる。さらに、施工段階で前記基礎杭が正規の位置からズレてしまっても前記杭主筋と前記梁主筋との干渉の発生を低減し、前記基礎梁の設置作業の効率化を図ることができる。 According to the inventions according to claims 1 to 3, since the width in the short direction of the lower end portion of the foundation beam is set to be larger than the width in the transverse direction of the center portion of the foundation beam, It is not necessary to increase the width in the short direction of the section more than necessary, and the amount of concrete used can be reduced compared to the case where the cross section of the foundation beam is substantially rectangular. In addition, the space between the main bars of the foundation beam (that is, the gap between one main bar and the other main bars) can be increased to reduce the possibility of interference between the main bar and the main bar. Thus, the installation work of the foundation beam can be made more efficient. Furthermore, even if the foundation pile is displaced from the normal position at the construction stage, it is possible to reduce the occurrence of interference between the pile main bar and the beam main bar, and to improve the efficiency of the installation work of the foundation beam.

請求項４に係る発明によれば、前記長手方向中央部の梁せいを小さくすることでコンクリートの使用量を低減することができる。 According to the invention which concerns on Claim 4, the usage-amount of concrete can be reduced by making small the beam claw of the said longitudinal direction center part.

請求項５に係る発明によれば、前記貫通孔を穿設する位置が決定していない段階でも前記基礎梁の作成を開始でき、その分、作業期間の短縮を図ることができる。 According to the invention which concerns on Claim 5, preparation of the said foundation beam can be started even if the position which drills the said through-hole is not determined, and the work period can be shortened by that much.

図１（ａ）は、本発明に係る建築物の構造の一例を示す側面図であり、同図（ｂ）は、その基礎梁のＰ−Ｐ断面図であり、同図（ｃ）は、その基礎梁のＱ−Ｑ断面図である。Fig.1 (a) is a side view which shows an example of the structure of the building based on this invention, The figure (b) is PP sectional drawing of the foundation beam, The figure (c) is It is QQ sectional drawing of the foundation beam. 図２は、建築物の従来構造の一例を示す側面図であり、同図（ｂ）は、そのＲ−Ｒ断面図である。FIG. 2 is a side view showing an example of a conventional structure of a building, and FIG. 2B is an RR cross-sectional view thereof.

以下、図１（ａ）〜（ｃ）に沿って、本発明の実施の形態について説明する。 Hereinafter, embodiments of the present invention will be described with reference to FIGS.

本発明に係る建築物は、図１（ａ）に符号１で例示するものであって、
・地中に埋設されてなる複数の鉄筋コンクリート製の基礎杭２と、
・該複数の基礎杭２に支持される鉄筋コンクリート製の基礎梁３と、
を備えている。ここで、該基礎梁３の下端（下面）を含む部分３ａを“基礎梁下端部”とし、該基礎梁３における該基礎梁下端部３ａの上側の部分３ｂ_１，３ｂ_２であって該基礎梁３の高さ方向ｚの中央部３ｂ_１，３ｂ_２を“基礎梁中央部”とした場合に、図１（ｂ）（ｃ）に例示するように、該基礎梁下端部３ａの短手方向ｙの幅Ｗ_３ａが該基礎梁中央部３ｂ_１，３ｂ_２の短手方向ｙの幅Ｗ_３ｂより大きくなるように設定されていて、該基礎梁下端部３ａ及び該基礎梁中央部３ｂ_１，３ｂ_２で形成される部分の断面形状が略逆Ｔ字状となるように設定されている。そして、前記基礎杭２の主筋（本明細書において“杭主筋”とする）Ｄの少なくとも一部は、該基礎梁下端部３ａの部分であって前記基礎梁中央部３ｂ_１，３ｂ_２よりも出っ張った部分に埋設されるように配置されている。なお、図１（ｂ）（ｃ）に示す例では、前記基礎梁３の上端部分３ｃ_１，３ｃ_２も拡幅されているが、もちろんこれに限られるものではなく、拡幅されていなくても良い。 The building according to the present invention is illustrated by reference numeral 1 in FIG.
A plurality of reinforced concrete foundation piles 2 embedded in the ground;
A foundation beam 3 made of reinforced concrete supported by the plurality of foundation piles 2;
It has. Here, the portion 3a including the lower end (lower surface) of the foundation beam 3 is referred to as a “foundation beam lower end portion”, and the upper portions 3b ₁ and 3b ₂ of the foundation beam 3 above the foundation beam lower end portion 3a. When the center portions 3b ₁ and 3b ₂ in the height direction z of the beam 3 are defined as “foundation beam center portions”, the short side of the foundation beam lower end portion 3a is exemplified as shown in FIGS. The width W _{3a in the} direction y is set to be larger than the width W _{3b in} the short direction y of the foundation beam center portions 3b ₁ and 3b ₂ , and the foundation beam lower end portion 3a and the foundation beam center portion 3b ₁ , 3b ₂ is set so that the cross-sectional shape of the portion formed by 3b ₂ is substantially inverted T-shaped. And at least a part of the main reinforcement D (referred to as “pile main reinforcement” in the present specification) D of the foundation pile 2 is a part of the foundation beam lower end portion 3a and is more than the foundation beam center portions 3b ₁ and 3b _2. It is arranged to be buried in the protruding part. In the example shown in FIGS. 1B and 1C, the upper end portions 3c ₁ and 3c _{2 of the} foundation beam 3 are also widened. However, the present invention is not limited to this and may not be widened. .

本発明によれば、前記基礎梁下端部３ａの短手方向ｙの幅Ｗ_３ａが前記基礎梁中央部３ｂ_１，３ｂ_２の短手方向ｙの幅Ｗ_３ｂよりも大きくなるように設定されているので、該基礎梁中央部３ｂ_１，３ｂ_２の短手方向ｙの幅_３ｂを必要以上に大きくしなくて良くなり、基礎梁の断面を略矩形状とする場合に比べてコンクリートの使用量を低減することができる。また、前記基礎梁３の梁主筋Ｅの離間間隔（つまり、一の梁主筋Ｅと他の梁主筋Ｅとの間の間隙（短手方向ｙの間隙））を大きく取ることができ、前記杭主筋Ｄと前記梁主筋Ｅとが干渉するおそれを低減して、前記基礎梁３の設置作業の効率化を図ることができる。さらに、施工段階で前記基礎杭２が正規の位置からズレてしまっても前記杭主筋Ｄと前記梁主筋Ｅとの干渉の発生を低減し、前記基礎梁３の設置作業の効率化を図ることができる。 According to the present invention, are set such that the width W _3a in the transverse direction y of the foundation beam lower portion 3a is larger than the width W _3b in the transverse direction y of the foundation beam central portion 3b _1, 3b ₂ Therefore, it is not necessary to unnecessarily increase the width _3b in the short-side direction y of the central beam central portions 3b ₁ and 3b ₂ , and the amount of concrete used compared to the case where the cross section of the basic beam is substantially rectangular. Can be reduced. In addition, the spacing between the beam main reinforcing bars E of the foundation beam 3 (that is, a gap between one beam main reinforcing bar E and another beam main reinforcing bar E (gap in the short direction y)) can be increased. The possibility that the main reinforcement D and the beam main reinforcement E interfere with each other can be reduced, and the installation work of the foundation beam 3 can be made more efficient. Furthermore, even if the foundation pile 2 is displaced from the normal position at the construction stage, the occurrence of interference between the pile main reinforcement D and the beam principal reinforcement E is reduced, and the installation work of the foundation beam 3 is made more efficient. Can do.

この場合、前記基礎梁下端部３ａの短手方向ｙの幅Ｗ_３ａは、前記基礎杭２の幅Ｗ_２と同等以上にすると良い。 In this case, the width W _{3a in the} transverse direction y of the foundation beam lower end portion 3a may be equal to or greater than the width W _{2 of the} foundation pile 2.

上述した基礎梁下端部３ａを含む部分又は前記基礎梁３の全体は、プレキャスト工法により作成するようにしても、或いは、現場打ちにより作成するようにしても、どちらでも良い。前記基礎梁下端部３ａをプレキャスト工法により作成するようにした場合には、その分、現場打ちの作業を減らして作業の効率化を図ることができる。 The portion including the lower end portion 3a of the foundation beam described above or the entire foundation beam 3 may be created either by a precast method or by spotting. When the base beam lower end portion 3a is prepared by the precast method, the work performed on site can be reduced correspondingly, and the work efficiency can be improved.

ところで、前記基礎梁３の梁せいは、その長手方向ｘに沿って同じである必要はない。今、前記基礎梁３の部分であって前記基礎杭２によって支持される部分３Ａを“支持部”とした場合に、該基礎梁３の部分３Ｂであって、隣接する２つの前記支持部３Ａ，３Ａの間の中央部（つまり、長手方向中央部）３Ｂの近傍の部分の梁せいＨ_３Ｂを他の部分の梁せいＨ_３Ａに比べて小さくしても良い。つまり、隣接する２つの前記支持部３Ａの間の長手方向中央部３Ｂの梁せいＨ_３Ｂは、該支持部の部分３Ａの梁せいＨ_３Ａよりも小さく設定すると良い。このような構造の基礎梁３においては前記長手方向中央部３Ｂに作用する曲げモーメントは他の部分に作用する曲げモーメントよりも小さくなるので前記梁せいＨ_３Ｂが小さくても強度的な問題は無く、また、該梁せいＨ_３Ｂを小さくすることによりコンクリートの使用量を低減することができる。 By the way, the beam of the foundation beam 3 does not have to be the same along the longitudinal direction x. Now, when a portion 3A which is a portion of the foundation beam 3 and is supported by the foundation pile 2 is a “support portion”, the two adjacent support portions 3A which are the portions 3B of the foundation beam 3 and which are adjacent to each other. , the central portion between 3A (i.e., the longitudinal center portion) may be smaller than the sei Ryo H _3B portion in the vicinity of 3B in sei Ryo H _3A of other portions. That is, it is preferable to set the beam length H _3B of the central portion 3B in the longitudinal direction between the two adjacent support portions _3A to be smaller than the beam length H 3A of the portion 3A of the support portion. In the foundation beam 3 having such a structure, the bending moment acting on the longitudinal central portion 3B is smaller than the bending moment acting on other portions, so that there is no problem in strength even if the beam length H _3B is small. Moreover, the amount of concrete used can be reduced by reducing the beam length H _3B .

さらに、前記長手方向中央部３Ｂの上側には、現場打ちで形成される部分（以下、“現場打ち部”とする）４を配置し、該現場打ち部４には、該現場打ち部４を前記短手方向ｙに沿って貫通する貫通孔４ａ，４ｂ，４ｃを形成しておくと良い。そして、その貫通孔４ａ，４ｂ，４ｃは、設備のための配管用の孔や人通口として利用すると良い。そのようにした場合には、該貫通孔４ａ，４ｂ，４ｃの位置が決定していない段階でも前記基礎梁３の作成を開始でき、その分、作業期間の短縮を図ることができる。なお、図１（ａ）に示す例では、前記貫通孔４ａ，４ｂ，４ｃは上端側に配置されているが、もちろんこれに限られるものではなく、下端側に配置するようにしても良い。 Further, on the upper side of the longitudinal central portion 3B, a portion formed by spotting (hereinafter referred to as “spotting part”) 4 is disposed. It is preferable to form through-holes 4a, 4b, 4c penetrating along the short direction y. And the through-holes 4a, 4b, and 4c are good to utilize as a hole for piping for a facility, or a personal passage. In such a case, the creation of the foundation beam 3 can be started even at a stage where the positions of the through holes 4a, 4b, 4c are not determined, and the work period can be shortened accordingly. In the example shown in FIG. 1A, the through holes 4a, 4b, and 4c are arranged on the upper end side. However, the present invention is not limited to this, and may be arranged on the lower end side.

１建築物
２基礎杭
３基礎梁
３ａ基礎梁下端部
３ｂ_１，３ｂ_２基礎梁中央部
３Ａ支持部
３Ｂ長手方向中央部
４現場打ち部
４ａ，４ｂ，４ｃ貫通孔
Ｄ基礎杭の杭主筋
Ｈ_３Ａ支持部の部分の梁せい
Ｈ_３Ｂ長手方向中央部の梁せい
Ｗ_２基礎杭の幅
Ｗ_３ａ基礎梁下端部の短手方向の幅
Ｗ_３ｂ基礎梁中央部の短手方向の幅
ｙ短手方向 1 building 2 foundation pile 3 footing beams 3a foundation beam lower portion _3b 1, 3b ₂ foundation beam central portion 3A supporting portion 3B longitudinal center portion 4 cast-in-place portions 4a, 4b, 4c through hole D foundation pile of pile main reinforcement _{H 3A} sei Ryo H _3B longitudinal center portion of the sei Ryo W ₂ basic width W _3a basal width y lateral direction in the transverse direction of the width W _3b foundation beam center portion in the short direction of the beam lower portion of the pile portion of the support portion

Claims

In a building comprising a plurality of reinforced concrete foundation piles embedded in the ground, and a reinforced concrete foundation beam supported by the plurality of foundation piles,
The portion including the lower end of the foundation beam is referred to as a “foundation beam lower end portion”, and the upper portion of the foundation beam at the lower end portion of the foundation beam and the center portion in the height direction of the foundation beam is referred to as “the foundation beam middle portion”. If
The width in the short direction of the lower end of the foundation beam is shorter than that of the center of the foundation beam so that the cross-sectional shape of the lower end of the foundation beam and the portion formed at the center of the foundation beam is substantially inverted T-shaped. Set to be larger than the width of the direction,
The lower end portion of the foundation beam has the same width in the lateral direction over the entire longitudinal direction of the foundation beam,
At least a part of the pile main reinforcement of the foundation pile is disposed so as to be embedded in a portion of the lower end portion of the foundation beam and protruding from the center portion of the foundation beam,
A building characterized by that.

The width in the short direction of the lower end of the foundation beam is equal to or greater than the width of the foundation pile,
The building according to claim 1.

The part including the lower end portion of the foundation beam or the whole of the foundation beam is created by a precast method or on-site driving,
The building according to claim 1 or 2, characterized in that.

When the portion of the foundation beam that is supported by the foundation pile is a “supporting portion”,
The beam portion of the central portion between the two adjacent support portions (hereinafter referred to as “longitudinal central portion”) is set smaller than the beam portion of the support portion portion.
The building according to any one of claims 1 to 3, wherein

On the upper side of the longitudinal central portion, a portion formed by spotting (hereinafter referred to as “spotting part”) is arranged,
The spot punched portion is formed with a through-hole penetrating the spot punched portion along the short direction.
The building according to claim 4 .

A plurality of reinforced concrete foundation piles buried in the ground and supported by the plurality of foundation piles
In a building with reinforced concrete foundation beams
  A portion including the lower end of the foundation beam is referred to as a “base beam lower end portion”, and the foundation beam lower end portion of the foundation beam
When the center portion in the height direction of the foundation beam is the “foundation beam middle portion” and the portion including the upper end of the foundation beam is the “upper end portion of the foundation beam”,
  The lower end portion of the foundation beam and the upper end portion of the foundation beam are arranged in the short direction of the foundation beam lower end portion and the upper end portion of the foundation beam so that a cross-sectional shape of a portion formed by the lower end portion of the foundation beam, the upper end portion of the foundation beam, and the center portion of the foundation beam becomes The width is set to be larger than the width in the short direction of the center portion of the foundation beam,
The foundation beam lower end and the foundation beam upper end have the same width in the lateral direction over the entire longitudinal direction of the foundation beam,
  At least a part of the pile main reinforcement of the foundation pile is disposed so as to be embedded in a portion of the lower end portion of the foundation beam and a portion of the upper end of the foundation beam that protrudes from the center portion of the foundation beam,
  A building characterized by that.