JP2000336664A - Pile head joining structure for steel pipe pile - Google Patents
Pile head joining structure for steel pipe pileInfo
- Publication number
- JP2000336664A JP2000336664A JP11144769A JP14476999A JP2000336664A JP 2000336664 A JP2000336664 A JP 2000336664A JP 11144769 A JP11144769 A JP 11144769A JP 14476999 A JP14476999 A JP 14476999A JP 2000336664 A JP2000336664 A JP 2000336664A
- Authority
- JP
- Japan
- Prior art keywords
- steel pipe
- pile
- pipe pile
- pile head
- main reinforcements
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Piles And Underground Anchors (AREA)
- Foundations (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、鋼管杭の杭頭部に
おける基礎梁と柱との接合構造に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a joint structure between a foundation beam and a column at a pile head of a steel pipe pile.
【０００２】[0002]
【従来の技術】従来の鋼管杭は、図４及び図５に示した
ように、施工現場にて掘削孔内に鋼管６１を建て込み、
この鋼管６１内の上端までコンクリートを充填し、鋼管
６１の上端外周に、杭頭部接合筋としての鉄筋６４を溶
接で定着し、これらの杭頭部接合筋６４間を通して基礎
梁主筋６２を設置し、基礎梁主筋６２にあばら筋６３を
捲回し、さらに、鋼管６１内に充填されたコンクリート
の上端には、アンカー（図示せず）により柱主筋（図示
せず）を固定すると共に帯筋（図示せず）を捲回する。
以上のように配筋して型枠を設置し、コンクリートを打
設して基礎梁６０を形成し、鋼管杭の杭頭部接合構造が
構築される。2. Description of the Related Art As shown in FIGS. 4 and 5, a conventional steel pipe pile is constructed by embedding a steel pipe 61 in an excavation hole at a construction site.
Concrete is filled up to the upper end of the steel pipe 61, and a reinforcing bar 64 as a pile head joint is fixed to the outer periphery of the upper end of the steel pipe 61 by welding, and a foundation beam main reinforcement 62 is installed between these pile head joints 64. Then, the stirrup 63 is wound around the main beam main reinforcement 62, and further, a column main reinforcement (not shown) is fixed to an upper end of the concrete filled in the steel pipe 61 by an anchor (not shown) and a band reinforcement (not shown). (Not shown).
The formwork is installed by arranging the bars as described above, the concrete is cast, and the foundation beam 60 is formed, and the pile head joint structure of the steel pipe pile is constructed.
【０００３】また、杭頭部接合筋６４と鋼管６１上端と
は、上述した溶接以外に、ネジ式カプラーを用いる定着
も行われている。すなわち、鋼材製作工場にて、予め鋼
管６１の上端外周にネジ式カプラーを溶接し、鋼管の建
込み後に施工現場で杭頭部接合筋６４の下端をカプラー
内にねじ込んで、杭頭部接合筋６４は鋼管６１上端に定
着される。[0003] In addition to the above-described welding, the pile head joint bar 64 and the upper end of the steel pipe 61 are also fixed using a screw type coupler. That is, a screw type coupler is welded in advance to the outer periphery of the upper end of the steel pipe 61 at the steel material manufacturing plant, and the lower end of the pile head joint bar 64 is screwed into the coupler at the construction site after the steel pipe is built, and the pile head joint bar is welded. 64 is fixed to the upper end of the steel pipe 61.
【０００４】[0004]
【発明が解決しようとする課題】上述したように、鋼管
杭の杭頭部接合構造において、杭頭部接合筋６４を溶接
により鋼管杭６１に定着する場合、施工現場における溶
接自体が付着強度や品質確保という点で信頼性が低く、
また溶接箇所が低いため作業性が悪く、さらに、土に接
近しているため泥や水による汚れで溶接品質が低下する
ことが懸念される。As described above, in a pile head joint structure for steel pipe piles, when the pile head joint reinforcement 64 is fixed to the steel pipe pile 61 by welding, the welding itself at the construction site has an adhesive strength or Low reliability in terms of quality assurance,
In addition, the workability is poor due to the low welded area, and there is a concern that the weld quality is degraded due to dirt from mud or water due to being close to the soil.
【０００５】また上述の如くネジ式カプラーを用いた場
合、杭頭部接合筋６４の直径に較べてカプラーの外径が
大きく、杭頭部接合筋の本数や納まりが制約を受ける。
したがって、鋼管杭の杭径は、構造的な性能よりも杭頭
部接合筋やカプラーの納まりで決定されるという本末転
倒が起こる。[0005] Further, when the screw type coupler is used as described above, the outer diameter of the coupler is larger than the diameter of the joint 64 of the pile head, and the number and fitting of the joints of the pile head are restricted.
Accordingly, the pile diameter of the steel pipe pile is determined by the fitting of the joint at the head of the pile or the coupler rather than the structural performance.
【０００６】さらに、上記従来の鋼管杭の杭頭部接合構
造では、鋼管が負担する応力が杭頭部接合筋を介して基
礎梁に伝達されるため、杭頭部接合筋の本数や納まりに
よっては、鋼管の優れた断面性能を充分に発揮できない
という問題がある。Furthermore, in the conventional pile head joint structure for steel pipe piles, since the stress borne by the steel pipe is transmitted to the foundation beam via the pile head joint, the number of pile head joints and the number of joints are limited. However, there is a problem that the excellent sectional performance of the steel pipe cannot be sufficiently exhibited.
【０００７】本発明では、上記従来技術の問題点を解決
せんとしたものであり、その課題は、施工現場における
作業性が良好で、構造的な強度や品質確保という点で信
頼性が高い鋼管杭の杭頭部接合構造を提供することにあ
る。[0007] The present invention has been made to solve the above-mentioned problems of the prior art, and its object is to provide a steel pipe having good workability at a construction site and having high reliability in structural strength and quality assurance. An object of the present invention is to provide a pile head joint structure for a pile.
【０００８】また本発明の別の課題は、鋼管杭から、基
礎梁や柱等の他の部材への応力伝達が良好な鋼管杭の杭
頭部接合構造を提供することにある。Another object of the present invention is to provide a pile head joint structure of a steel pipe pile in which stress transmission from the steel pipe pile to other members such as foundation beams and columns is good.
【０００９】[0009]
【課題を解決するための手段】本発明では、鋼管杭の杭
頭部の所定箇所に貫通孔が形成され、該貫通孔を通して
基礎梁主筋が該鋼管杭内部に配設され、柱主筋の下端が
該鋼管杭上端から内部に配設され、これら鋼管杭の杭頭
部と基礎梁主筋と柱主筋とがコンクリート中に埋設され
て一体化されてなることを特徴とする鋼管杭の杭頭部接
合構造を提供する。According to the present invention, a through-hole is formed at a predetermined position of a pile head of a steel pipe pile, a main reinforcing bar of the foundation beam is disposed inside the steel pipe pile through the through-hole, and a lower end of the column main reinforcing bar is provided. Is disposed inside from the upper end of the steel pipe pile, and the pile head of the steel pipe pile, the main reinforcement of the foundation beam and the main reinforcement of the column are buried in concrete and integrated with each other, and the pile head of the steel pipe pile is integrated. Provide a joint structure.
【００１０】本発明では、前記基礎梁主筋と前記貫通孔
の内縁との間のクリアランスを埋めるように、鋼材等の
連結材を配置しても良い。このように基礎梁主筋を貫通
孔部分で固定すれば、配筋精度、位置の確保が容易にな
るといった効果が得られる。In the present invention, a connecting member such as a steel material may be arranged so as to fill a clearance between the main beam main reinforcement and the inner edge of the through hole. If the main reinforcement of the foundation beam is fixed at the through-hole portion in this manner, an effect is obtained in that the arrangement accuracy and the position can be easily secured.
【００１１】[0011]
【実施例】以下、添付図面に基づいて実施例を説明する
が、本発明はこれに限定されるものではない。図１は本
発明の一実施例である鋼管杭の杭頭部接合構造を示す断
面図であり、図２（ａ）〜（ｄ）は杭頭部接合構造を構
築する際の各工程を示した断面図であり、さらに、図３
は本発明の一実施例である杭頭部接合構造における基礎
梁主筋の配置を示した斜視図である。図１において、鋼
管杭１１の杭頭部には複数箇所に貫通孔１２が形成さ
れ、これらの貫通孔１２から基礎梁主筋１３を鋼管杭１
１内部に延設し、鋼管杭上端１１ａから柱主筋（図示せ
ず）の下端を鋼管杭１１内部に配設し、これら鋼管杭１
１の杭頭部と基礎梁主筋１３と柱主筋とがコンクリート
で一体化されて杭頭部接合構造１０が形成される。DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments will be described below with reference to the accompanying drawings, but the present invention is not limited to these embodiments. FIG. 1 is a sectional view showing a pile head joint structure of a steel pipe pile according to one embodiment of the present invention, and FIGS. 2A to 2D show respective steps when constructing a pile head joint structure. FIG.
FIG. 3 is a perspective view showing an arrangement of a main beam main reinforcement in a pile head joint structure according to an embodiment of the present invention. In FIG. 1, through holes 12 are formed at a plurality of locations in a pile head of a steel pipe pile 11, and a main beam main reinforcing bar 13 is formed from the through holes 12 with the steel pipe pile 1.
1 and the lower end of a column main bar (not shown) is disposed inside the steel pipe pile 11 from the upper end 11a of the steel pipe pile.
The pile head 1, the foundation beam main reinforcement 13, and the column main reinforcement are integrated with concrete to form the pile head joint structure 10.
【００１２】ここで、前記鋼管杭１１の貫通孔１２の周
りには、図３において点線と斜線で囲んだ範囲に鋼鈑等
からなる補強材を貼り付けて補強しても良い。また貫通
孔１２の配置や数は、鋼管杭１１の杭頭部に接続される
基礎梁の配置により適宜定められる。Here, a reinforcing material made of a steel plate or the like may be attached around the through hole 12 of the steel pipe pile 11 in a range surrounded by a dotted line and an oblique line in FIG. The arrangement and number of the through holes 12 are appropriately determined by the arrangement of the foundation beams connected to the pile head of the steel pipe pile 11.
【００１３】前記基礎梁主筋１３と、鋼管杭１１の貫通
孔１２の内縁との間に生じるクリアランスには、このク
リアランスを埋めるように鋼材等の連結材を設けて、基
礎梁主筋１３を拘束しても良い。また基礎梁主筋１３
は、鋼管杭１１の外部に設置された部分のみにあばら筋
１４を捲回し、鋼管杭内部に設置された部分ではあばら
筋を配筋しない。これは、鋼管杭内部の基礎梁主筋１３
が、コンクリートを介して鋼管に拘束されており、ここ
に作用するせん断力は、鋼管杭内部の基礎梁主筋１３に
は直接伝達せずに、鋼管杭１１の杭頭部から基礎梁や柱
に直接伝達するためせん断補強筋の省略が可能になる。A clearance between the main reinforcement 13 of the foundation beam and the inner edge of the through hole 12 of the steel pipe pile 11 is provided with a connecting member such as a steel material so as to fill the clearance. May be. In addition, main beam main reinforcement 13
The stirrup 14 is wound around only the portion installed outside the steel pipe pile 11, and the stirrup is not arranged at the portion installed inside the steel pipe pile. This is the main beam reinforcement 13 inside the steel pipe pile.
However, the shear force acting on the steel pipe is not transmitted directly to the main reinforcement 13 of the foundation beam inside the steel pipe pile, but is transmitted from the pile head of the steel pipe pile 11 to the foundation beam or column. Direct transmission allows the omission of shear reinforcement.
【００１４】前記柱主筋も、基礎梁主筋１３と同様に、
鋼管杭１１の杭頭部の外に配設される部分には、せん断
補強筋としての帯筋（図示せず）を捲回するものの、鋼
管杭１１の杭頭部の中に配設される部分には帯筋を省略
することができる。The column main reinforcement is also similar to the foundation beam main reinforcement 13,
Although a band (not shown) serving as a shear reinforcing bar is wound around a portion of the steel pipe pile 11 disposed outside the pile head, the steel pipe pile 11 is disposed inside the pile head of the steel pipe pile 11. The stirrup can be omitted in the part.
【００１５】次に、図２（ａ）〜（ｄ）を参照して、本
発明の杭頭部接合構造の構築方法について説明する。杭
として使用する鋼管の上端部所定箇所には、基礎梁の鉄
筋や断面が納まる大きさの貫通孔１２を予め設けてお
く。そして、鋼管杭の設置位置を掘削して孔を形成し、
貫通孔１２が施工時地表面２１の上に位置するように、
鋼管を孔の中に建て込んで図２（ａ）のように鋼管杭１
１を形成し、内部には施工時地表面２１の高さまでコン
クリートを充填する。Next, with reference to FIGS. 2A to 2D, a method for constructing the joint structure of the pile head according to the present invention will be described. A through hole 12 large enough to accommodate a reinforcing bar or a cross section of the foundation beam is provided in advance at a predetermined location at the upper end of a steel pipe used as a pile. And excavated the installation position of the steel pipe pile to form a hole,
As the through hole 12 is located on the ground surface 21 at the time of construction,
A steel pipe is erected in the hole, and as shown in FIG.
1 is formed and the inside is filled with concrete up to the height of the ground surface 21 at the time of construction.
【００１６】この充填コンクリートが硬化したら、図２
（ｂ）に示した如く、鋼管杭１１の杭頭部の貫通孔１２
に基礎梁主筋１３を通して、鋼管杭１１の外部に位置す
る基礎梁主筋１３にはあばら筋１４を捲回する。そし
て、鋼管杭１１の上端１１ａからは柱主筋（図示せず）
を挿入して、充填コンクリートの表面にアンカーして固
定し、鋼管杭１１の外部に位置する柱主筋には帯筋（図
示せず）を捲回する。When this filled concrete has hardened,
(B) As shown in FIG.
Then, a stirrup 14 is wound around the main beam 13 located outside the steel pipe pile 11 through the main beam 13. And, from the upper end 11a of the steel pipe pile 11, a column main bar (not shown).
Is inserted, anchored and fixed to the surface of the filled concrete, and a strip bar (not shown) is wound around the column main bar located outside the steel pipe pile 11.
【００１７】次に、柱主筋や杭頭部鋼管を保護するた
め、図２（ｃ）において点線２５と斜線で示した範囲に
フーチング用の鉄筋（図示せず）を配筋し、基礎梁とフ
ーチングのための型枠（図示せず）を建て込んだ後に、
コンクリートを打設する。このコンクリートの硬化後に
型枠を脱型すれば、図２（ｄ）に示した如く、基礎梁と
フーチングとが構築できる。さらに、フーチングの上に
突設された柱主筋等の鉄筋の周りに型枠を建て込み、コ
ンクリートを打設して柱を構築すれば、鋼管杭の杭頭部
接合構造は構築できる。最後に、基礎梁とフーチングの
周りを、図２（ｅ）の如く埋め戻せば、工事は完了す
る。Next, in order to protect the column main reinforcement and the pile head steel pipe, a reinforcing steel bar (not shown) for footing is arranged in a range indicated by a dotted line 25 and a diagonal line in FIG. After building a formwork (not shown) for footing,
Pour concrete. If the mold is removed after the concrete has hardened, the foundation beam and the footing can be constructed as shown in FIG. 2 (d). Furthermore, if a formwork is erected around a reinforcing bar such as a column main bar projecting above the footing and concrete is cast to construct a column, a pile head joint structure of a steel pipe pile can be constructed. Finally, if the area around the foundation beam and footing is backfilled as shown in FIG. 2 (e), the construction is completed.
【００１８】[0018]
【発明の効果】本発明の鋼管杭の杭頭部接合構造では、
基礎梁主筋と柱主筋とが鋼管杭内部に配設され、コンク
リートで一体化されて基礎梁やフーチングが形成された
ので、鋼管杭から、基礎梁、フーチング及び柱等の他の
部材への応力伝達が良好に行われ、特に、杭の負担応力
が大きな軟弱地盤における建物や、高層建築物に適用し
た場合には、鋼管の優れた断面性能を充分に利用した設
計が可能となり、従来の杭頭部接合筋による納まりの煩
雑さが解消されるという理由により有効である。[Effect of the Invention] In the pile head joint structure of the steel pipe pile of the present invention,
Since the foundation beam main reinforcement and column main reinforcement were arranged inside the steel pipe pile and integrated with concrete to form the foundation beam and footing, the stress from the steel pipe pile to other members such as the foundation beam, footing and column Good transmission is achieved.In particular, when applied to buildings on soft ground or high-rise buildings where the stress on the piles is large, the design that makes full use of the excellent cross-sectional performance of steel pipes becomes possible. This is effective because the complexity of fitting by the head joint muscle is eliminated.
【００１９】また本発明において、基礎梁主筋の鋼管杭
内部に設置された部分では、コンクリートを介して鋼管
杭の杭頭部により拘束されるため、あばら筋を捲回する
こと無く、せん断力に対抗することが可能となり、あば
ら筋の配筋工程を簡略化できる。さらに、柱主筋におい
ても、同様に、鋼管杭内部に設置された部分では帯筋を
捲回すること無く、せん断力に対抗可能であり、その配
筋工程が簡略化される。In the present invention, the portion of the main reinforcement of the foundation beam installed inside the steel pipe pile is constrained by the pile head of the steel pipe pile via concrete, so that the stirrup is not wound and the shear force is reduced. Competition can be achieved, and the stirrup arrangement process can be simplified. Further, also in the column main reinforcing bar, similarly, the portion installed inside the steel pipe pile can resist the shearing force without winding the band reinforcing bar, and the reinforcing process is simplified.
【００２０】さらに本発明では、鋼管杭の上端部に貫通
孔を形成し、その貫通孔を通して基礎梁主筋を配筋し、
鋼管杭はその上端部を基礎梁内に埋設することで接合さ
れるので、従来の鋼管杭のように、溶接で鋼管杭に固定
された杭頭部接合筋が不要になった。したがって、杭頭
部接合構造の構造的性能が、溶接の品質で影響を受ける
ことが無くなった。Further, according to the present invention, a through hole is formed at the upper end of the steel pipe pile, and the main reinforcement of the foundation beam is arranged through the through hole.
Since the steel pipe piles are joined by embedding the upper end of the piles in the foundation beam, there is no need for a pile head joint that is fixed to the steel pipe piles by welding, unlike the conventional steel pipe piles. Accordingly, the structural performance of the pile head joint structure is no longer affected by the quality of the weld.
【００２１】[0021]
【図１】本発明の一実施例である鋼管杭の杭頭部接合構
造を示す断面図である。FIG. 1 is a sectional view showing a pile head joint structure of a steel pipe pile according to an embodiment of the present invention.
【図２】（ａ）〜（ｄ）は図１の杭頭部接合構造を構築
する各工程を示した断面図である。2 (a) to 2 (d) are cross-sectional views showing respective steps for constructing the pile head joint structure of FIG.
【図３】本発明の一実施例である杭頭部接合構造におけ
る基礎梁主筋の配置を示した斜視図である。FIG. 3 is a perspective view showing an arrangement of a main beam main reinforcement in a pile head joint structure according to an embodiment of the present invention.
【図４】従来の鋼管杭の杭頭部における配筋状況を側方
から見た側面図である。FIG. 4 is a side view of a conventional steel pipe pile at a pile head when viewed from the side.
【図５】従来の鋼管杭の杭頭部接合構造を示す断面図で
ある。FIG. 5 is a cross-sectional view showing a conventional pile head joint structure of a steel pipe pile.
１０ 鋼管杭の杭頭部接合構造 １１ 鋼管杭 １１ａ 鋼管杭上端 １２ 基礎梁鉄筋貫通孔 １３ 基礎梁主筋 Reference Signs List 10 pile head joint structure of steel pipe pile 11 steel pipe pile 11a upper end of steel pipe pile 12 foundation beam reinforcement through hole 13 foundation beam main reinforcement
Claims (1)
成され、該貫通孔を通して基礎梁主筋が該鋼管杭内部に
配設され、柱主筋の下端が該鋼管杭上端から内部に配設
され、これら鋼管杭の杭頭部と基礎梁主筋と柱主筋とが
コンクリート中に埋設されて一体化されてなることを特
徴とする鋼管杭の杭頭部接合構造。1. A through hole is formed at a predetermined position of a pile head of a steel pipe pile, a main beam main reinforcement is disposed inside the steel pipe pile through the through hole, and a lower end of a column main reinforcement is inserted from an upper end of the steel pipe pile to the inside. A pile head joint structure for a steel pipe pile, wherein the pile head, foundation beam reinforcement, and column reinforcement of the steel pipe pile are buried and integrated in concrete.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11144769A JP2000336664A (en) | 1999-05-25 | 1999-05-25 | Pile head joining structure for steel pipe pile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11144769A JP2000336664A (en) | 1999-05-25 | 1999-05-25 | Pile head joining structure for steel pipe pile |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2000336664A true JP2000336664A (en) | 2000-12-05 |
Family
ID=15370000
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11144769A Pending JP2000336664A (en) | 1999-05-25 | 1999-05-25 | Pile head joining structure for steel pipe pile |
Country Status (1)
| Country | Link |
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| JP (1) | JP2000336664A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015507109A (en) * | 2013-01-07 | 2015-03-05 | 広東保威新能源有限公司 | Separate spiral pile and its welding method |
| CN114809011A (en) * | 2022-05-05 | 2022-07-29 | 上海建工集团股份有限公司 | Full-recovery assembled foundation pit supporting structure and construction method thereof |
-
1999
- 1999-05-25 JP JP11144769A patent/JP2000336664A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015507109A (en) * | 2013-01-07 | 2015-03-05 | 広東保威新能源有限公司 | Separate spiral pile and its welding method |
| CN114809011A (en) * | 2022-05-05 | 2022-07-29 | 上海建工集团股份有限公司 | Full-recovery assembled foundation pit supporting structure and construction method thereof |
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