JPH11280063A - Pile head structure and pile head hardware - Google Patents
Pile head structure and pile head hardwareInfo
- Publication number
- JPH11280063A JPH11280063A JP8091198A JP8091198A JPH11280063A JP H11280063 A JPH11280063 A JP H11280063A JP 8091198 A JP8091198 A JP 8091198A JP 8091198 A JP8091198 A JP 8091198A JP H11280063 A JPH11280063 A JP H11280063A
- Authority
- JP
- Japan
- Prior art keywords
- pile head
- pile
- lid
- steel pipe
- head
- 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)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本願発明は、鋼管杭その他の
既成杭の杭頭部とフーチング等の杭頭コンクリートとの
結合部の構造および杭頭結合用の杭頭金物に関するもの
である。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a joint portion between a pile head of a steel pipe pile or other existing pile and a pile head concrete such as a footing and a pile head metal fitting for coupling the pile head.
【０００２】[0002]
【従来の技術】鋼管杭の杭頭部は、フーチング等の杭頭
コンクリートと剛結するという考え方が一般的であり、
そのための杭頭構造としては、従来、図３および図４に
示されるものが一般的である。2. Description of the Related Art It is a general idea that a pile head of a steel pipe pile is rigidly connected to a pile head concrete such as a footing.
Conventionally, the pile head structure shown in FIGS. 3 and 4 is generally used.
【０００３】図３の構造は、フーチング１内に鋼管杭２
の杭頭部を一定長Ｌ≧Ｄだけ埋め込み、埋め込んだ部分
で杭頭拘束曲げモーメントに抵抗するものである。[0003] The structure shown in FIG.
Of the pile head is embedded by a fixed length L ≧ D, and the embedded portion resists the pile head restrained bending moment.
【０００４】図中、７は、鋼管杭２の杭頭部内外面に現
場ですみ肉溶接したずれ止めであり、６は、フーチング
下側主鉄筋である。また、杭頭内には中詰めコンクリー
ト８が打設され、その状態でフーチング１のコンクリー
トの打設により杭頭部がコンクリート内に埋設されてい
る。[0004] In the drawing, reference numeral 7 denotes a slip stopper which is fillet welded on the inside and outside of the pile head of the steel pipe pile 2 at the site, and reference numeral 6 denotes a footing lower main reinforcing bar. In addition, the filling concrete 8 is cast in the pile head, and the pile head is buried in the concrete by casting the concrete of the footing 1 in this state.
【０００５】一方、図４の構造は、フーチング１内の鋼
管杭２の埋込み長さは最小限に留め、主として鉄筋で補
強することにより杭頭曲げモーメントに抵抗するもので
ある。On the other hand, in the structure of FIG. 4, the embedded length of the steel pipe pile 2 in the footing 1 is kept to a minimum, and the pile pipe is mainly reinforced with a reinforcing bar to resist the pile head bending moment.
【０００６】すなわち、主筋とフープ筋からなる中詰め
補強鉄筋９を、鋼管杭２の杭頭内に挿入し、下部を中詰
めコンクリート８に定着させ、上部をフーチング１の厚
み内に突出させ、フーチング下側主鉄筋６等を配筋して
フーチング１のコンクリートの打設により定着させてい
る。More specifically, a hollow reinforcing steel bar 9 consisting of a main reinforcing bar and a hoop bar is inserted into the pile head of the steel pipe pile 2, the lower part is fixed to the hollow concrete 8, and the upper part is projected into the thickness of the footing 1. The footing lower main reinforcing bar 6 and the like are arranged, and the footing 1 is fixed by casting concrete.
【０００７】[0007]
【発明が解決しようとする課題】上述した図３および図
４の構造とも、鋼管杭２の内面にずれ止め７を取り付け
るのが面倒であり、特に鋼管杭２の内径が小さい場合、
すみ肉溶接が困難となる。3 and 4, it is troublesome to attach the slip stopper 7 to the inner surface of the steel pipe pile 2, especially when the inner diameter of the steel pipe pile 2 is small.
Fillet welding becomes difficult.
【０００８】また、ずれ止め７を予め工場で取り付ける
ことも考えられるが、各鋼管杭２を所定に深さにそろえ
て施工することは困難であり、現場で杭頭を切り揃える
ことが多く、結局は現場で面倒な作業が残ることにな
る。Further, it is conceivable to attach the slip stopper 7 in a factory beforehand, but it is difficult to construct the steel pipe piles 2 at a predetermined depth, and the pile heads are often cut and trimmed on site. After all, troublesome work remains on the site.
【０００９】図４の構造の場合は、さらに中詰め補強鉄
筋９の位置の確保が難しいという問題もある。In the case of the structure shown in FIG. 4, there is another problem that it is difficult to secure the position of the reinforcing reinforcing bar 9 in the middle.
【００１０】また、図３および図４の構造とも、鋼管杭
２の杭頭内に打設される中詰めコンクリート８が鋼管杭
２の下方に落下しないような工夫が必要となる。3 and 4, it is necessary to take measures to prevent the hollow concrete 8 cast into the pile head of the steel pipe pile 2 from falling below the steel pipe pile 2.
【００１１】本願発明は、上述のような課題の解決を図
ったものであり、施工性に優れ、安価で効率のよい杭頭
構造および杭頭金物を提供することを目的としている。The present invention has been made to solve the above-mentioned problems, and has as its object to provide an inexpensive and efficient pile head structure and a pile head metal having excellent workability.
【００１２】[0012]
【課題を解決するための手段】本願の請求項１に係る杭
頭構造は、地盤中に打設された既設杭の杭頭部に、杭頭
部の外径より大きい内径を有し上端を閉塞した筒状の蓋
体と、前記蓋体に一体化したアンカー部材とからなる杭
頭金物を被せ、杭頭部を杭頭コンクリート内に埋設した
ことを特徴とするものである。According to a first aspect of the present invention, there is provided a pile head structure having an inner diameter larger than an outer diameter of a pile head and an upper end provided on a pile head of an existing pile installed in the ground. The present invention is characterized in that a pile head metal comprising a closed cylindrical lid and an anchor member integrated with the lid is covered, and the pile head is buried in the pile head concrete.
【００１３】杭頭金物の蓋体の内径をできるだけ杭頭部
の外径に近づけることで、引抜き力が作用した場合でも
外れにくくすることができる。また、鋼管杭やＳＣ杭
（鋼管コンクリート複合パイル）に用いる場合には、蓋
体の下端を必要に応じ溶接してもよい。By making the inner diameter of the cover of the pile head metal as close to the outer diameter of the pile head as possible, it is possible to prevent the pile head from coming off even when a pulling force is applied. Moreover, when using for a steel pipe pile or SC pile (steel pipe concrete composite pile), you may weld the lower end of a lid as needed.
【００１４】また、杭頭部および蓋体内面に互いに螺合
するねじを形成すること、杭頭部外面と蓋体内面の摩擦
が大きくなるような粗面を形成すること、あるいは杭頭
部外面と蓋体内面との間に詰めものをすること等も考え
られる。[0014] Further, a screw which is screwed to each other is formed on the pile head and the lid inner surface, a rough surface is formed so as to increase friction between the outer surface of the pile head and the inner surface of the lid, or the outer surface of the pile head is formed. It is also conceivable to fill the space between the lid and the inner surface of the lid.
【００１５】ただし、通常は、上部構造物を支える杭に
は鉛直下向きの荷重が作用しているため、ネガティブフ
リクション等を考慮する場合においても、蓋体と杭頭部
のラップ長をある程度確保し、地震等の水平力による曲
げモーメントに抵抗できるようにしておけば、鋼管杭と
杭頭金物との間の結合力はそれほど問題とならない場合
も多く、その場合は杭頭部と蓋体の間に若干の隙間があ
いてもよい。However, since a vertically downward load is normally applied to the pile supporting the upper structure, even when negative friction or the like is taken into consideration, the wrap length between the lid and the pile head is secured to some extent. If it is possible to resist bending moments due to horizontal forces such as earthquakes, the bonding force between the steel pipe pile and the pile head hardware is often not a problem. There may be some gaps in the space.
【００１６】例えば、高層の建物については、ロッキン
グ振動により振動方向の片側の杭には大きな圧縮力が作
用し、反対側の杭には引張力（引抜き力）が作用する場
合等を考慮する必要があるが、低層建物等、高さに比べ
床面積の大きい建物では、引抜き力はあまり問題となら
ず、主として鉛直支持力と杭頭の曲げモーメントが問題
となり、本願発明は特に後者の場合に適している。For example, in a high-rise building, it is necessary to consider a case where a large compressive force acts on a pile on one side in the vibration direction and a tensile force (pull-out force) acts on a pile on the other side due to rocking vibration. However, in buildings with a large floor area compared to height, such as low-rise buildings, the pull-out force is not a problem, and the vertical bearing force and the bending moment of the pile head are problems, and the present invention is particularly applicable to the latter case. Are suitable.
【００１７】本願の請求項２に係る杭頭金物は、上記杭
頭構造に用いられるものであり、杭頭部の外径より大き
い内径を有し、上端を閉塞した筒状の蓋体と、前記蓋体
に一体化したアンカー部材とからなることを特徴とす
る。The pile head metal according to claim 2 of the present application is used for the pile head structure, and has a cylindrical lid body having an inner diameter larger than the outer diameter of the pile head and having an upper end closed. And an anchor member integrated with the lid.
【００１８】その作用あるいは機能については上述した
通りであり、また蓋体とアンカー部材からなる簡単な構
成であり、安価に大量生産することができる。The operation or function is as described above, and it has a simple structure consisting of a lid and an anchor member, and can be mass-produced at low cost.
【００１９】請求項３は、請求項２に係る杭頭金物にお
いて、アンカー部材が、前記蓋体の外面に溶接した複数
本の鉄筋または帯鋼からなる場合である。A third aspect of the present invention is the pile head metal according to the second aspect, wherein the anchor member is made of a plurality of reinforcing bars or steel strips welded to the outer surface of the lid.
【００２０】この他、アンカー部材の形態については、
種々の改変が可能であり、また蓋体自体についても単純
な形態であり、必要に応じ、蓋体にもずれ止めを溶接し
たり、ずれ止めのための凹凸を形成してもよい。In addition, regarding the form of the anchor member,
Various modifications are possible, and the lid itself is also a simple form. If necessary, a stopper may be welded to the lid, or irregularities for the stopper may be formed.
【００２１】[0021]
【発明の実施の形態】図１は本願発明の杭頭構造の一実
施形態を示したもので、図２は本願発明の杭頭金物の一
実施形態を示したものである。FIG. 1 shows an embodiment of a pile head structure according to the present invention, and FIG. 2 shows an embodiment of a pile head metal according to the present invention.
【００２２】本実施形態における杭頭金物３は、図２に
示すように上端が閉塞された筒状の蓋体４の外周に複数
のアンカー筋５を溶接したものである。The pile head metal 3 in this embodiment is formed by welding a plurality of anchor bars 5 to the outer periphery of a cylindrical lid 4 whose upper end is closed as shown in FIG.
【００２３】この杭頭金物３を、地盤中に打設された鋼
管杭２の頭部に上から被せ、フーチング下側主鉄筋６そ
の他必要な配筋を行って、フーチング１のコンクリート
を打設することで、図１に示すような杭頭構造が得られ
る。The pile head metal 3 is put on the head of the steel pipe pile 2 cast in the ground from above, and the footing lower main reinforcing bar 6 and other necessary reinforcing bars are arranged, and the concrete of the footing 1 is cast. By doing so, a pile head structure as shown in FIG. 1 is obtained.
【００２４】なお、本実施形態では、杭頭金物３のアン
カー部材として、上述のように鉄筋を用いているが、こ
れにさらにフープ筋を取り付けたり、あるいは帯鋼その
他をアンカー部材として用いてもよい。In this embodiment, as described above, a reinforcing bar is used as an anchor member of the pile head metal 3, but a hoop bar may be further attached thereto, or a steel strip or the like may be used as an anchor member. Good.
【００２５】また、杭頭金物３が鋼管杭２の頭部を閉塞
するため、中詰めコンクリートが不要となっているが、
鋼管杭２の杭頭部を補強する等の目的で中詰めコンクリ
ートを充填することは差し支えない。Further, since the pile head metal 3 blocks the head of the steel pipe pile 2, the filling concrete is not required.
Filling with concrete for filling, for example, to reinforce the pile head of the steel pipe pile 2 may be performed.
【００２６】また、本実施形態は、杭が鋼管杭の場合で
あるが、コンクリート杭（中空コンクリート杭や節杭も
含む）、ＳＣ杭等にも同様に適用することができる。Although this embodiment is a case where the pile is a steel pipe pile, it can be similarly applied to a concrete pile (including a hollow concrete pile and a knotted pile), an SC pile and the like.
【００２７】[0027]
【発明の効果】杭頭補強のための現場作業は、打設さ
れた既成杭の頭部に杭頭金物を被せるだけであり、施工
が容易である。また、杭頭金物を被せるだけなので、鋼
管杭に限らず、各種コンクリート杭、節杭、ＳＣ杭等、
中空であるか否かにかかわらず適用可能である。The on-site work for reinforcing the pile head simply involves putting the pile head metal on the head of the existing pile that has been cast, and the construction is easy. In addition, since it only covers the pile head metal, not only steel pipe piles, but also various concrete piles, knots, SC piles, etc.
It is applicable whether it is hollow or not.
【００２８】打設された鋼管杭などの杭頭部を揃える
ために、現場で杭頭部を切断する場合でも、杭頭金物の
取り付けには何等支障とならない。[0028] Even if the pile head is cut off at the site to align the pile heads of the cast steel pipe pile or the like, there is no hindrance to mounting the pile head hardware.
【００２９】ずれ止めの溶接、その他、面倒な現場作
業がないため、施工が楽である。Since there is no welding to prevent slippage or other troublesome on-site work, construction is easy.
【００３０】杭頭金物が蓋の役割をしているため、鋼
管杭その他の中空杭について、中詰めコンクリートの落
下防止の工夫を要しない。Since the pile head metal functions as a lid, it is not necessary to prevent the steel pipe pile and other hollow piles from dropping the filled concrete.
【００３１】杭頭金物には予めアンカー部材が取り付
けられており、杭頭金物を杭頭部に被せるだけでアンカ
ー部材の位置が確保される。An anchor member is attached to the pile head metal in advance, and the position of the anchor member is ensured only by putting the pile head metal on the pile head.
【００３２】以上の理由から、コストが低減でき、施
工を迅速かつ精度よく行うことができる。For the above reasons, the cost can be reduced and the construction can be performed quickly and accurately.
【図１】 本願発明の杭頭構造の一実施形態を示す鉛直
断面図である。FIG. 1 is a vertical sectional view showing an embodiment of a pile head structure of the present invention.
【図２】 本願発明の杭頭金物の一実施形態を示す斜視
図である。FIG. 2 is a perspective view showing an embodiment of a pile head metal according to the present invention.
【図３】 従来の杭頭構造の一例を示す鉛直断面図であ
る。FIG. 3 is a vertical sectional view showing an example of a conventional pile head structure.
【図４】 従来の杭頭構造の他の例を示す鉛直断面図で
ある。FIG. 4 is a vertical sectional view showing another example of the conventional pile head structure.
１…フーチング、２…鋼管杭、３…杭頭金物、４…蓋
体、５…アンカー筋、６…主鉄筋、７…ずれ止め、８…
中詰めコンクリート、９…中詰め補強鉄筋DESCRIPTION OF SYMBOLS 1 ... Footing, 2 ... steel pipe pile, 3 ... pile head metal, 4 ... lid, 5 ... anchor bar, 6 ... main rebar, 7 ... non-slip, 8 ...
Filled concrete, 9 ... Filled reinforcing steel
Claims (3)
杭頭部の外径より大きい内径を有し上端を閉塞した筒状
の蓋体と、前記蓋体に一体化したアンカー部材とからな
る杭頭金物を被せ、杭頭部を杭頭コンクリート内に埋設
したことを特徴とする杭頭構造。Claims: 1. A pile head of an existing pile driven into the ground,
A cylindrical lid having an inner diameter larger than the outer diameter of the pile head and having a closed upper end, and a pile head metal comprising an anchor member integrated with the lid are covered with the pile head, and the pile head is placed in the pile head concrete. A pile head structure characterized by being buried.
端を閉塞した筒状の蓋体と、前記蓋体に一体化したアン
カー部材とからなることを特徴とする杭頭金物。2. A pile head metal fitting comprising a cylindrical lid having an inner diameter larger than the outer diameter of the pile head and having a closed upper end, and an anchor member integrated with the lid.
溶接した複数本の鉄筋または帯鋼からなる請求項２記載
の杭頭金物。3. The pile head fitting according to claim 2, wherein the anchor member is made of a plurality of reinforcing bars or steel strips welded to an outer surface of the lid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8091198A JPH11280063A (en) | 1998-03-27 | 1998-03-27 | Pile head structure and pile head hardware |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8091198A JPH11280063A (en) | 1998-03-27 | 1998-03-27 | Pile head structure and pile head hardware |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH11280063A true JPH11280063A (en) | 1999-10-12 |
Family
ID=13731582
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8091198A Pending JPH11280063A (en) | 1998-03-27 | 1998-03-27 | Pile head structure and pile head hardware |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH11280063A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20020079082A (en) * | 2001-04-13 | 2002-10-19 | 구일건설(주) | Structure method of head cover for steel tube file and its structure |
| JP2009091899A (en) * | 2003-09-09 | 2009-04-30 | Nippon Steel Corp | Pile head reinforcing member and pile head reinforcing structure using the same |
| JP2011220073A (en) * | 2010-04-14 | 2011-11-04 | Fukuoka Univ | Pile head junction component and pile head junction structure using the same |
| JP2020007904A (en) * | 2018-06-29 | 2020-01-16 | ジャパンパイル株式会社 | Concrete pile with double steel pipe, method for manufacturing the same, manufacturing device, pile head joint structure and jointed pile structure |
| JP2020111905A (en) * | 2019-01-09 | 2020-07-27 | 清水建設株式会社 | Pile head joining structure and construction method therefor |
| JP2021179157A (en) * | 2020-05-17 | 2021-11-18 | 株式会社クラウン | Diametrally expanded pile head joint structure by deformed steel bar with hook |
-
1998
- 1998-03-27 JP JP8091198A patent/JPH11280063A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20020079082A (en) * | 2001-04-13 | 2002-10-19 | 구일건설(주) | Structure method of head cover for steel tube file and its structure |
| JP2009091899A (en) * | 2003-09-09 | 2009-04-30 | Nippon Steel Corp | Pile head reinforcing member and pile head reinforcing structure using the same |
| JP2011220073A (en) * | 2010-04-14 | 2011-11-04 | Fukuoka Univ | Pile head junction component and pile head junction structure using the same |
| JP2020007904A (en) * | 2018-06-29 | 2020-01-16 | ジャパンパイル株式会社 | Concrete pile with double steel pipe, method for manufacturing the same, manufacturing device, pile head joint structure and jointed pile structure |
| JP2020111905A (en) * | 2019-01-09 | 2020-07-27 | 清水建設株式会社 | Pile head joining structure and construction method therefor |
| JP2021179157A (en) * | 2020-05-17 | 2021-11-18 | 株式会社クラウン | Diametrally expanded pile head joint structure by deformed steel bar with hook |
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