JP2016138398A - Footing integrated foundation pile structure and footing integrated foundation pile construction method - Google Patents

Footing integrated foundation pile structure and footing integrated foundation pile construction method Download PDF

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JP2016138398A
JP2016138398A JP2015013720A JP2015013720A JP2016138398A JP 2016138398 A JP2016138398 A JP 2016138398A JP 2015013720 A JP2015013720 A JP 2015013720A JP 2015013720 A JP2015013720 A JP 2015013720A JP 2016138398 A JP2016138398 A JP 2016138398A
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pile
steel pipe
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JP6430271B2 (en
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木谷 好伸
Yoshinobu Kitani
好伸 木谷
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Mitani Sekisan Co Ltd
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Abstract

PROBLEM TO BE SOLVED: To enable a footing to be easily constructed on a foundation pile using a concrete-based precast pile.SOLUTION: A concrete pile body 2 is covered with a steel pipe 10. The steel pipe 10 above the pile body 2 is a projection 12. A precast pile 1 is constructed by disposing a low strength concrete 16 in the projection 12. (a) A pile hole 32 is bored from the ground surface 31 to bury a lower pile 33 and the precast pile 1. (b) The concrete 16 in the projection 12 is removed. (c) Outer peripheral side of the projection 12 of the steel pipe 10 is covered with a lower part 23 of a cylindrical attachment 20, and first open holes 13, 13 of the precast pile 1 and second open holes 26, 26 of the attachment 20 are communicated, and the steel pile 10 and the attachment 20 are fixed with bolts 38 and nuts 39 to construct a footing integrated foundation pile structure 50. (d) One end of an underground beam 41 for footing is fixed on a side face 25 of the attachment 20. The footing is constructed by arranging other necessary bars and installing concrete.SELECTED DRAWING: Figure 4

Description

本発明は、既製杭を埋設して構成した基礎杭の上端部を、上方構造物のフーチングに容易に定着させるフーチング一体の基礎杭構造及びフーチング一体の基礎杭の構築方法に関する。   The present invention relates to a footing-integrated foundation pile structure in which an upper end portion of a foundation pile configured by burying an already-made pile is easily fixed to a footing of an upper structure, and a method for constructing a footing-integrated foundation pile.

従来基礎杭の上端部は上部構造物の下端部(フーチング)に定着させることにより、上部構造物の鉛直荷重などの各種荷重を基礎杭で受けることができた。通常円形断面でコンクリート系や鉄骨系の構造体である既製杭と、鉄筋コンクリート構造、鉄骨構造、鉄骨鉄筋コンクリート構造の上部構造物とをつなぐことは面倒であった。一般には、コンクリート系の基礎杭であれば、上端部のコンクリ−トを崩して、構造鉄筋を露出させる必要があり、作業が面倒であった。   By fixing the upper end of the conventional foundation pile to the lower end (footing) of the upper structure, various loads such as the vertical load of the upper structure could be received by the foundation pile. It has been troublesome to connect a ready-made pile, which is usually a concrete or steel structure with a circular cross-section, and an upper structure of a reinforced concrete structure, steel structure, or steel reinforced concrete structure. In general, for concrete foundation piles, it is necessary to break the concrete at the upper end to expose the structural reinforcing bars, which is troublesome.

そこで、例えば、コンクリート製の既製杭で、上端部で構造鉄筋の周りに剥離剤を塗って、上端部を崩し易い構造とした提案があった(特許文献1)。
また、既製杭の上端に鋼管を接合して、鋼管内にコンクリートを充填して、鉄骨柱の下端部をこのコンクリート内に埋設させる提案があった(特許文献2)。
また、鋼管杭では、鋼管の上端部に貫通孔を設けて、フーチング用の鉄筋を通す発明も提案されている(特許文献3、4)。
Thus, for example, there has been a proposal that a ready-made pile made of concrete has a structure in which the upper end portion is easily broken by applying a release agent around the structural rebar at the upper end portion (Patent Document 1).
There has also been a proposal to join a steel pipe to the upper end of a ready-made pile, fill the steel pipe with concrete, and embed the lower end of the steel column in the concrete (Patent Document 2).
Moreover, in the steel pipe pile, the invention which provides a through-hole in the upper end part of a steel pipe and lets the reinforcing bar for footing pass is also proposed (patent documents 3 and 4).

特開2011−80313号公報JP 2011-80313 A 特開2004−162374号公報JP 2004-162374 A 特開2002−227220号公報JP 2002-227220 A 特開2001−302584号公報JP 2001-302584 A

既製杭の上端部のコンクリート部分を崩して構造鉄筋を露出させる場合(特許文献1)には、剥離剤がその後の構造鉄筋の定着に支障がないように処理する必要があり、既製杭の上端に予め接続用の鋼管を固定した状態で埋設する場合(特許文献2)には、杭打ち機にて埋設する作業に工夫が必要であった。また、鋼管の上端部にフーチングの鉄筋を通す貫通孔を設ける場合(特許文献3、4)も同様に施工時に工夫が必要であった。さらに、上端部に鋼管を配置する場合には施工時に鋼管内面が汚れる問題点があった。   When the concrete part at the upper end of the ready-made pile is destroyed to expose the structural reinforcement (Patent Document 1), it is necessary to treat the release agent so as not to hinder the subsequent fixation of the structural reinforcement. In the case where the steel pipe for connection is fixed in advance (Patent Document 2), it is necessary to devise the work of burying with a pile driving machine. Moreover, when providing the through-hole which lets the reinforcing bar of a footing pass in the upper end part of a steel pipe (patent documents 3 and 4), the device was similarly needed at the time of construction. Furthermore, when a steel pipe is disposed at the upper end, there is a problem that the inner surface of the steel pipe is soiled during construction.

本発明は、コンクリート製の既製杭の杭本体の外周に鋼管を配置し、杭本体の上端より鋼管の上端を突出させ、平坦側面を有するアタッチメントを配置したので、あるいは鋼管の内面であって杭本体の上端より上方に除去容易の保護筒体を配置したので、前記問題点を解決した。   In the present invention, a steel pipe is arranged on the outer periphery of a pile body of a ready-made pile made of concrete, the upper end of the steel pipe is projected from the upper end of the pile body, and an attachment having a flat side surface is arranged. Since the easy-to-removable protective cylinder is arranged above the upper end of the main body, the above-mentioned problems have been solved.

即ちこの基礎杭構造の発明は、杭穴内に既製杭を埋設して、以下のようにして前記既製杭の上端部にフーチング構造体を構築したことを特徴とするフーチング一体の基礎杭構造である。
(1) 前記既製杭は、「コンクリート製の杭本体の外周を鋼管で被覆した既製杭であって、前記鋼管の上端部を前記杭本体の上端より突出させた既製杭」または「コンクリート製の本体上に鋼管を連結した既製杭」とし、前記鋼管の上端部に予め、複数の第一貫通孔を形成した。
(2) 前記既製杭の上端部であって、鋼管内又は鋼管の外周側に、少なくとも上部又は下部に平坦側面を有する角筒部を形成した鋼製のアタッチメントを配置して、前記アタッチメントに設けた第二貫通孔と前記第一貫通孔とを連通させ、前記第一貫通孔と前記第二貫通孔とに固定手段を挿通して、前記鋼管の上端部に前記アタッチメントを固定した。
(3) 前記第一貫通孔と第二貫通孔の少なくとも一方を横方向の長孔とした。
(4) 前記アタッチメントの角筒部の前記平坦側面に前記フーチングの構造体を固定した。
That is, the invention of the foundation pile structure is a footing-integrated foundation pile structure in which a ready-made pile is embedded in a pile hole and a footing structure is constructed at the upper end of the ready-made pile as follows. .
(1) The ready-made pile is “a ready-made pile in which the outer periphery of a concrete pile body is covered with a steel pipe, and an upper end portion of the steel pipe is protruded from an upper end of the pile body” or “a concrete pile. A plurality of first through holes were formed in advance on the upper end portion of the steel pipe.
(2) At the upper end of the ready-made pile, a steel attachment in which a square tube part having a flat side surface is formed at least at the upper part or the lower part is arranged in the steel pipe or on the outer peripheral side of the steel pipe, and provided in the attachment. The second through hole communicated with the first through hole, a fixing means was inserted into the first through hole and the second through hole, and the attachment was fixed to the upper end portion of the steel pipe.
(3) At least one of the first through hole and the second through hole is a laterally long hole.
(4) The footing structure is fixed to the flat side surface of the rectangular tube portion of the attachment.

前記において、以下のように構成したことを特徴とするフーチング一体の基礎杭構造である。
(1) 既製杭を「コンクリート製の杭本体の外周を鋼管で被覆した既製杭であって、前記鋼管の上端部を前記杭本体の上端より突出させた既製杭」とした。
(2) 前記鋼管の内面であって、前記杭本体より上方に、前記杭本体と略同一断面形状の保護筒体を設置して、前記保護筒体の外面を前記鋼管の内面に密着して、前記鋼管の第一貫通孔を塞いだ状態で、杭穴内に埋設した。
(3) 前記既製杭の埋設が完了した状態で、前記保護筒体を除去して、前記既製杭にアタッチメントを固定した。
In the above, the foot pile-integrated foundation pile structure is characterized as follows.
(1) The ready-made pile was defined as “a ready-made pile in which the outer periphery of a concrete pile body was covered with a steel pipe, and the upper end portion of the steel pipe was protruded from the upper end of the pile body”.
(2) An inner surface of the steel pipe, and a protective cylinder having substantially the same cross-sectional shape as the pile main body is installed above the pile main body, and the outer surface of the protective cylinder is in close contact with the inner surface of the steel pipe. The steel pipe was buried in a pile hole with the first through hole of the steel pipe closed.
(3) In the state where the laying of the ready-made pile was completed, the protective cylinder was removed, and an attachment was fixed to the ready-made pile.

また、前記において、以下のように構成したことを特徴とするフーチング一体の基礎杭構造である。
(1) アタッチメントを横断面が正方形の角筒からなり、下部に横方向の長孔からなる第二貫通孔を設けた。
(2) 前記アタッチメントの下部内面は、既製杭の上端部を緩く嵌合できる形状とした。
Moreover, in the above, it is the footing-integrated foundation pile structure characterized by being comprised as follows.
(1) The attachment was made of a square tube having a square cross section, and a second through-hole made of a transverse long hole was formed at the bottom.
(2) The lower inner surface of the attachment has a shape capable of loosely fitting the upper end of the ready-made pile.

また、他の基礎杭構造の発明は、杭穴内に既製杭を埋設して、以下のようにして前記既製杭の上端部にフーチング構造体を構築したことを特徴とするフーチング一体の基礎杭構造である。
(1) 前記既製杭は、「コンクリート製の本体の外周を鋼管で被覆した既製杭であって、前記鋼管の上端部を前記本体の上端より突出させた既製杭」または「コンクリート製の杭本体上に鋼管を連結した既製杭」とした。
(2) 前記鋼管の内面であって、前記杭本体より上方に、除去容易の保護筒体を配置した。
(3) 前記既製杭を埋設した後に、前記保護筒体を除去して、前記鋼管の上端部に前記フーチングの構造体を固定した。
Further, the invention of another foundation pile structure is characterized in that a ready-made pile is embedded in a pile hole, and a footing structure is constructed at the upper end of the ready-made pile as follows. It is.
(1) The ready-made pile is “a ready-made pile in which the outer periphery of a concrete main body is covered with a steel pipe, and an upper end portion of the steel pipe protrudes from an upper end of the main body” or “a concrete pile main body. It was designated as a ready-made pile with a steel pipe connected on top.
(2) An easily removable protective cylinder is disposed on the inner surface of the steel pipe and above the pile body.
(3) After burying the ready-made pile, the protective cylinder was removed, and the footing structure was fixed to the upper end of the steel pipe.

前記各基礎杭構造の発明において、以下のように構成したことを特徴とするフーチング一体の基礎杭構造である。
(1) 既製杭は、下端に他の既製杭との連結用の下端板を設けるとともに、杭本体の上端に上端板を設け、かつ鋼管の上端に突出端板を設けた。
(2) 杭穴内に、他のコンクリート製の下部既製杭を埋設して、該下部コンクリート上に既製杭を連結した。
In the invention of each foundation pile structure, the foundation pile structure is integrated with a footing and is configured as follows.
(1) The ready-made pile was provided with a lower end plate for connection with other ready-made piles at the lower end, an upper end plate at the upper end of the pile body, and a protruding end plate at the upper end of the steel pipe.
(2) Another concrete-made lower ready-made pile was buried in the pile hole, and the ready-made pile was connected on the lower concrete.

また、構築方法の発明は、杭穴内に、既製杭を埋設して、以下のように前記既製杭の上端部に、鋼製のアタッチメントを介してフーチング構造体を構築することを特徴としたフーチング一体の基礎杭の構築方法である。
(1) 前記既製杭を以下のように構成する。
(a) コンクリート製の杭本体の外周を鋼管で被覆して、前記鋼管の上端部を前記杭本体の上端より上方に突出させる。
(b) 鋼管の上端部に複数の第一貫通孔を形成する。
(c) 前記杭本体の上端に、前記杭本体と略同一断面形状の保護筒体を、着脱可能に設置して、前記保護筒体の外面を前記鋼管の内面に密着させ、前記鋼管の第一貫通孔を塞いだ状態としてある。
(2) 前記アタッチメントは、上部及び下部からなり、少なくとも前記上部が平坦側面を有する四角筒で形成され、「前記下部が前記既製杭の前記鋼管内に緩く嵌挿でき、あるいは前記鋼管の外周に緩く嵌装できる形状とし」かつ「前記下部に横方向の長孔からなる第二貫通孔を形成する。」
(3) 所定の杭穴を掘削して、あるいは杭穴を掘削しつつ、前記杭穴内に、前記保護筒体を有する既製杭を埋設する。
(4) 前記既製杭を所定深さに埋設した後、前記既製杭から前記保護筒体を取り外し、前記鋼管の上端部の内面および第一貫通孔を露出させる。
(5) 前記鋼管内又は鋼管の外周側に、前記アタッチメントを設置し、前記アタッチメントに設けた第二貫通孔と前記第一貫通孔とを連通させ、前記第一貫通孔と前記第二貫通孔とに固定手段を挿通して、前記鋼管の上端部に前記アタッチメントを固定する。
(6) 前記鋼製アタッチメントの上部の平坦側面に前記フーチング構造体を固定する。
The invention of the construction method is characterized in that a ready-made pile is embedded in a pile hole, and a footing structure is constructed at the upper end of the ready-made pile via a steel attachment as follows. This is a method of constructing an integral foundation pile.
(1) The ready-made pile is constructed as follows.
(a) The outer periphery of a concrete pile body is covered with a steel pipe, and the upper end portion of the steel pipe protrudes above the upper end of the pile body.
(b) A plurality of first through holes are formed at the upper end of the steel pipe.
(c) At the upper end of the pile main body, a protective cylinder having substantially the same cross-sectional shape as the pile main body is detachably installed, the outer surface of the protective cylinder is brought into close contact with the inner surface of the steel pipe, One through hole is closed.
(2) The attachment is composed of an upper part and a lower part, and at least the upper part is formed of a square cylinder having a flat side surface, and "the lower part can be loosely inserted in the steel pipe of the ready-made pile, or on the outer periphery of the steel pipe. “A shape that can be loosely fitted” and “a second through hole made of a transverse long hole is formed in the lower portion.”
(3) A pre-made pile having the protective cylinder body is buried in the pile hole while excavating a predetermined pile hole or excavating the pile hole.
(4) After burying the ready-made pile to a predetermined depth, the protective cylinder is removed from the ready-made pile, and the inner surface and the first through hole of the upper end portion of the steel pipe are exposed.
(5) The attachment is installed in the steel pipe or on the outer peripheral side of the steel pipe, the second through hole provided in the attachment and the first through hole are communicated, and the first through hole and the second through hole And fixing the attachment to the upper end of the steel pipe.
(6) The footing structure is fixed to the flat side surface at the top of the steel attachment.

また、他の構築方法の発明は、杭穴内に、既製杭を埋設して、以下のように前記既製杭の上端部にフーチング構造体を構築することを特徴としたフーチング一体の基礎杭の構築方法である。
(1) 前記既製杭を以下のように構成する。
(a) コンクリート製の杭本体の外周を鋼管で被覆して、前記鋼管の上端部を前記杭本体の上端より上方に突出させる。
(b) 前記杭本体の上端に、前記杭本体と略同一断面形状の保護筒体を、着脱可能に設置して、前記保護筒体の外面を前記鋼管の内面に密着させた状態としてある。
(2 ) 所定の杭穴を掘削して、あるいは杭穴を掘削しつつ、前記杭穴内に、前記保護筒体を有する既製杭を埋設する。
(3) 前記既製杭を所定深さに埋設した後、前記既製杭から前記保護筒体を取り外し、前記鋼管の上端部の内面を露出させる。
(4) 前記鋼管の上端部の内面又は外面に、前記フーチング構造体を固定する。
Further, the invention of another construction method is to construct a footing-integrated foundation pile characterized by burying a ready-made pile in a pile hole and constructing a footing structure at the upper end of the ready-made pile as follows Is the method.
(1) The ready-made pile is constructed as follows.
(a) The outer periphery of a concrete pile body is covered with a steel pipe, and the upper end portion of the steel pipe protrudes above the upper end of the pile body.
(b) A protective cylinder having substantially the same cross-sectional shape as the pile main body is detachably installed at the upper end of the pile main body, and the outer surface of the protective cylinder is in close contact with the inner surface of the steel pipe.
(2) A pre-made pile having the protective cylinder is embedded in the pile hole while excavating a predetermined pile hole or excavating the pile hole.
(3) After burying the ready-made pile to a predetermined depth, the protective cylinder is removed from the ready-made pile and the inner surface of the upper end portion of the steel pipe is exposed.
(4) The footing structure is fixed to the inner surface or the outer surface of the upper end portion of the steel pipe.

この発明は、コンクリート製の既製杭の杭本体の外周に鋼管を配置し、杭本体の上端より鋼管の上端を突出させ、平坦側面を有するアタッチメントを配置した取り付けたので、既製杭の傾斜や位置の不具合を微調節して、アタッチメントに地中梁を容易に固定でき、フーチング一体の既製杭を容易に構築できる。とりわけ、既製杭が1mを越すような大径となった場合などフーチングも大型化するので、フーチングの型枠の構築や既製杭をフーチング内に定着させるための配筋などを簡略化して、施工の簡略化や工期の短縮を図ることができる。
また、鋼管の内面であって杭本体の上端より上方に除去容易の保護筒体を配置したので、地中梁の構築時まで、鋼管の内面を保護して、鋼管の清掃などの作業を省略して地中梁の構築作業を簡略化できる。
In this invention, the steel pipe is arranged on the outer periphery of the pile body of the ready-made pile made of concrete, the upper end of the steel pipe is protruded from the upper end of the pile body, and the attachment having the flat side surface is arranged. By finely adjusting the defects, the underground beam can be easily fixed to the attachment, and a ready-made pile integrated with the footing can be easily constructed. In particular, since the footing will be enlarged, such as when the ready-made pile has a diameter exceeding 1 m, construction of the footing formwork and the arrangement of the ready-made pile in the footing will be simplified for construction. Can be simplified and the construction period can be shortened.
In addition, a protective cylinder that is easy to remove is placed on the inner surface of the steel pipe and above the top of the pile body, so that the inner surface of the steel pipe is protected and the work such as cleaning the steel pipe is omitted until the construction of the underground beam. The construction work of underground beams can be simplified.

この発明の実施態様で使用するアタッチメントで、(a)は正面図、(b)は上部のA1−A1断面図、(c)は下部のA−A断面図、(d)はアタッチメントと既製杭とを連結した状態を表すA2−A2断面図、(e)はアタッチメントと既製杭とを他の連結とした状態を表すA2−A2断面図である。It is an attachment used in an embodiment of the present invention, (a) is a front view, (b) is an A1-A1 cross-sectional view of the upper part, (c) is a cross-sectional view of the lower AA line, (d) is an attachment and a ready-made pile. A2-A2 sectional view showing the state which connected, and (e) is an A2-A2 sectional view showing the state where the attachment and the ready-made pile were made into another connection. この発明の実施態様で使用する他のアタッチメントで、(a)は平面図、(b)は正面図、(c)は底面図、(d)はB−B断面図、(e)(f)は既製杭と連結した状態のB−B断面図を表す。In other attachments used in the embodiment of the present invention, (a) is a plan view, (b) is a front view, (c) is a bottom view, (d) is a BB cross-sectional view, (e) (f) Represents a BB cross-sectional view in a state of being connected to a ready-made pile. この発明の実施態様で使用する既製杭で、(a)は縦断面図、(b)はC−C断面図、(c)は保護筒体などを除去した状態を表す縦断面図である。It is the ready-made pile used by the embodiment of this invention, (a) is a longitudinal cross-sectional view, (b) is CC sectional drawing, (c) is a longitudinal cross-sectional view showing the state which removed the protection cylinder etc. FIG. (a)〜(d)は、フーチング一体の基礎杭構造を構築する手順を表す概略した縦断面図である。(A)-(d) is the schematic longitudinal cross-sectional view showing the procedure of constructing the foundation pile structure integrated with a footing. (a)〜(c)は、他のフーチング一体の基礎杭構造を構築する手順を表す概略した縦断面図である。(A)-(c) is the schematic longitudinal cross-sectional view showing the procedure of constructing the foundation pile structure of another footing integral. (a)〜(c)は、他のフーチング一体の基礎杭構造を構築する手順を表す概略した縦断面図である。(A)-(c) is the schematic longitudinal cross-sectional view showing the procedure of constructing the foundation pile structure of another footing integral.

図面に基づいて、この発明の実施態様を説明する。   Embodiments of the present invention will be described with reference to the drawings.

1.既製杭1の構成 1. Configuration of ready-made pile 1

(1) この発明の実施に使用する既製杭1は、コンクリート製の杭本体2の外周に鋼管10を設けてなる構造で、いわゆるSC杭と呼ばれる構造である。
(2) 杭本体2は、ドーナツ状の上端板3と下端板4が配置され、鋼管10の内側(下端板4と上端板3との間)には緻密な圧縮強度が大きな(例えば、圧縮強度105N/mm 程度)コンクリート(モルタル)5が充填されている。
ドーナツ状の上端板3と下端板4の間に、構造鉄筋又はPC鋼棒などの軸方向の鋼材を埋設させても、あるいは何も配置しなくても、いずれでも可能である。
(3) 鋼管10は、杭本体2の下端板4から杭本体2の上端板3を越えてさらに、杭本体2の上面(上端板3の上面)から高さLだけ上方に突出している。すなわち、上端板3は、鋼管10の上端からLだけ下方に配置されている。
鋼管10の上端にドーナツ状の突出端板14(上端板3、下端板4と同様の構造)を取り付け、上端板3と突出端板14との間には、杭本体2のコンクリート(モルタル)5と同等または比較的圧縮強度が小さな(例えば、圧縮強度 60〜80N/mm 程度)コンクリート(モルタル)16が充填されている。
また、鋼管10で、杭本体2に対応する部分(下端板4から上端板3の間)を基部11、上端板3から突出端板14までを突出部12とする。鋼管10の突出部12で上部に、横方向の長孔からなる第一貫通孔13、13を軸周りに回転対称に4箇所(角度90°毎)に、かつ上下に間隔H0を空けて2段に配置する(図3(a)(b))。
(4) 以上のような構造の既製杭1を、遠心成型で製造する。鋼管10は外径D01、内径D02の円筒形に形成される。また、コンクリート5は上端板3、下端板4に挟まれ、コンクリート16は上端板3と突出端板に挟まれるので、両コンクリート5、16が混ざることなく、容易に遠心成形で筒型(ドーナッツ型)に成型できる。
(1) The ready-made pile 1 used for implementation of this invention is the structure formed by providing the steel pipe 10 in the outer periphery of the concrete pile main body 2, and is a structure called what is called SC pile.
(2) The pile main body 2 is provided with a donut-shaped upper end plate 3 and a lower end plate 4, and a dense compressive strength is large inside the steel pipe 10 (between the lower end plate 4 and the upper end plate 3) (for example, compression) Strength (approximately 105 N / mm 2 ) is filled with concrete (mortar) 5.
It is possible to embed an axial steel material such as a structural reinforcing bar or a PC steel bar between the donut-shaped upper end plate 3 and the lower end plate 4 or to dispose nothing.
(3) The steel pipe 10 protrudes from the lower end plate 4 of the pile body 2 beyond the upper end plate 3 of the pile body 2 and further upwards by a height L from the upper surface of the pile body 2 (upper surface of the upper end plate 3). That is, the upper end plate 3 is disposed below the upper end of the steel pipe 10 by L.
A donut-shaped protruding end plate 14 (same structure as the upper end plate 3 and the lower end plate 4) is attached to the upper end of the steel pipe 10, and the concrete (mortar) of the pile body 2 is interposed between the upper end plate 3 and the protruding end plate 14. 5 (for example, compressive strength of about 60 to 80 N / mm 2 ) concrete (mortar) 16 is filled.
Further, in the steel pipe 10, a portion corresponding to the pile body 2 (between the lower end plate 4 and the upper end plate 3) is defined as a base 11, and a portion from the upper end plate 3 to the projecting end plate 14 is defined as a projecting portion 12. At the upper part of the projecting portion 12 of the steel pipe 10, the first through holes 13, 13 consisting of long holes in the lateral direction are rotationally symmetrical around the axis at four locations (at an angle of 90 °), and at intervals of up and down 2 It arrange | positions to a stage (FIG. 3 (a) (b)).
(4) The ready-made pile 1 having the above structure is manufactured by centrifugal molding. The steel pipe 10 is formed in a cylindrical shape having an outer diameter D01 and an inner diameter D02. Further, since the concrete 5 is sandwiched between the upper end plate 3 and the lower end plate 4, and the concrete 16 is sandwiched between the upper end plate 3 and the projecting end plate, both the concretes 5 and 16 are not mixed and can be easily formed by centrifugal molding (donuts). Mold).

(5)既製杭1の他の構成
(a) 前記既製杭1の実施態様において、保護筒体としてコンクリート(モルタル)16を充填したが、遠心成型でコンクリート16を成型する際に、コンクリート16をさらに第一貫通孔13、13内にも充填して(コンクリート16の外面に第一貫通孔13、13に嵌挿する突部を形成して)、施工中に第一貫通孔13、13が汚れないにように保護することもできる(図示していない)。
(b) また、前記既製杭1の実施態様において、鋼管10の突出部12に、保護筒体として、比較的圧縮強度が小さなコンクリート(モルタル)16を充填したが、埋設作業時に鋼管10の突出部12の内面12aが泥土で汚されないことが好ましいので、鋼管10の突出部12の内面12aにシートや破壊容易な樹脂ブロック(発泡スチロール製など)などの被覆物(保護筒体)が配置されていれば、コンクリート(モルタル)16は省略することもできる(図示していない)。また、施工時に鋼管10の突出部12の内面12aを清掃できれば、シートなどの被覆物も省略することができる(図示していない)。
(c) また、前記既製杭1の実施態様において、鋼管10は杭本体2の全体を覆ったが、鋼管の無い杭本体2のみで充分な曲げ強度を確保できれば、外周をコンクリート面とした通常のコンクリート杭から杭本体2を構成し、杭本体2の上端板3に、長さLの鋼管10(突出部12相当分)の下端を溶接などで連結して、既製杭1を構成することもできる(図示していない)。
(d) また、前記既製杭1の実施態様において、鋼管10に対して突出端板14を着脱可能に取り付けして、突出端板14の下面にアンカーを下方に向けて固定して、突出端板を引き上げると鋼管10の突出部12に位置するコンクリート16も引き上げられる構造とすることもできる(図示していない)。
(5) Other configurations of the ready-made pile 1 (a) In the embodiment of the ready-made pile 1, the concrete (mortar) 16 is filled as a protective cylinder, but when the concrete 16 is formed by centrifugal molding, the concrete 16 is used. Furthermore, it fills also in the 1st through-holes 13 and 13 (it forms the protrusion fitted in the 1st through-holes 13 and 13 in the outer surface of the concrete 16), and the 1st through-holes 13 and 13 are constructed during construction. It can also be protected from contamination (not shown).
(B) Moreover, in the embodiment of the said ready-made pile 1, although the protrusion part 12 of the steel pipe 10 was filled with the concrete (mortar) 16 with comparatively small compressive strength as a protection cylinder, the protrusion of the steel pipe 10 was carried out at the time of burial work. Since it is preferable that the inner surface 12a of the part 12 is not soiled by mud, a covering (protective cylinder) such as a sheet or an easily breakable resin block (made of polystyrene foam) is disposed on the inner surface 12a of the protruding part 12 of the steel pipe 10. If so, the concrete (mortar) 16 can be omitted (not shown). Moreover, if the inner surface 12a of the protrusion part 12 of the steel pipe 10 can be cleaned at the time of construction, a covering such as a sheet can be omitted (not shown).
(C) Moreover, in the embodiment of the said ready-made pile 1, although the steel pipe 10 covered the whole pile main body 2, if the sufficient bending strength can be ensured only with the pile main body 2 without a steel pipe, the outer periphery will be the concrete surface normally A pile main body 2 is constructed from a concrete pile of the other, and the lower end of a steel pipe 10 having a length L (corresponding to the protruding portion 12) is connected to the upper end plate 3 of the pile main body 2 by welding or the like to constitute the ready-made pile 1. (Not shown).
(D) In the embodiment of the ready-made pile 1, the protruding end plate 14 is detachably attached to the steel pipe 10, and the anchor is fixed downward on the lower surface of the protruding end plate 14. It can also be set as the structure where the concrete 16 located in the protrusion part 12 of the steel pipe 10 is also pulled up if a board is pulled up (not shown).

2.アタッチメント20の構成 2. Structure of attachment 20

(1) 外径D01の円(=既製杭1の外径)を緩く内接できる一辺L1の内寸を有する断面略正方形の角筒からアタッチメント本体21を構成する。アタッチメント本体21は、横断面が略正方形であるので、平面視で互いに直角の4つの側面25、25を持ち、その側面25、25が平坦側面を構成する。前記における「緩く内接できる」とはアタッチメント本体21の内面21aと既製杭1の鋼管10の突出部12の外面12aとに、軸を中心にして回転できる程度の隙間を有する構造をいう(図1(d))。また、平坦側面は、通常は略鉛直で、鋼製の地中梁の端面を接合できる程度に、凹凸や屈曲の無い面(鉛直面)を指す。
通常、地上構造物は、平面視でX方向とY方向の互いに直角な(90°)方向に梁などが配置される構成となるので、これに対応して、側面(平坦側面)25が構成できるようにアタッチメント20を断面正方形としてある。
(2) アタッチメント本体21の下部23(各側面25、25の下部)に、第一貫通孔13に対応してこれに連通できる横方向の長孔からなる第二貫通孔26、26を形成する。第二貫通孔26は、第一貫通孔13と同じように、軸周りに回転対称に4箇所(角度90°毎)設け、かつ上下に間隔H0を空けて2段に配置する。なお、第二貫通孔26は、2段以上の多段とすることもできる(図示していない)。
以上のようにして、アタッチメント20を構成する(図1(a)〜(c))。
(1) The attachment main body 21 is composed of a square tube having a substantially square cross section having an inner dimension of one side L1 that can loosely inscribe a circle having an outer diameter D01 (= the outer diameter of the ready-made pile 1). Since the attachment main body 21 has a substantially square cross section, the attachment main body 21 has four side surfaces 25 and 25 that are perpendicular to each other in plan view, and the side surfaces 25 and 25 form a flat side surface. “Loosely inscribed” in the above means a structure having a gap that can be rotated around an axis between the inner surface 21a of the attachment main body 21 and the outer surface 12a of the protruding portion 12 of the steel pipe 10 of the ready-made pile 1 (see FIG. 1 (d)). Further, the flat side surface is usually substantially vertical and refers to a surface (vertical surface) having no unevenness or bending to the extent that the end surface of the steel underground beam can be joined.
Normally, a ground structure has a configuration in which beams and the like are arranged in a direction (90 °) perpendicular to each other in the X direction and the Y direction in plan view, and accordingly, a side surface (flat side surface) 25 is configured. The attachment 20 has a square cross section so that it can be made.
(2) The second through-holes 26 and 26 are formed in the lower portion 23 of the attachment body 21 (lower portions of the side surfaces 25 and 25) corresponding to the first through-holes 13 and formed by laterally elongated holes. . As with the first through-hole 13, the second through-holes 26 are provided in four locations (at an angle of 90 °) in a rotationally symmetric manner around the axis, and are arranged in two stages with an interval H0 vertically. Note that the second through hole 26 may be a multi-stage having two or more stages (not shown).
The attachment 20 is comprised as mentioned above (FIG. 1 (a)-(c)).

(3)アタッチメント20の他の構成
(a) 前記アタッチメント20の実施態様において、アタッチメント本体21は、外径D01の円を緩く内接できる一辺L1の内寸を有する角筒から構成したので、既製杭1の鋼管10の第一貫通孔13と第二貫通孔26との位置合わせやボルトでの固定作業が容易になるので好ましいが、設計上許容される程度に既製杭1の芯がずれた場合に、これを吸収する程度の緩さを含めることもできる。さらに、既製杭1の鋼管10とアタッチメント20の軸芯を一致させる必要が無いような場合には、アタッチメント本体21の内面21aと既製杭1の鋼管10の突出部12の外面12bとに、さらに隙間を多くすることもできる。
(b) また、前記アタッチメント20の実施態様において、横断面が正方形の角筒からアタッチメント本体21を構成したが、横断面が長方形とすることもできる、また、地上構造物のフーチングが、平面視で3角形をベースにして、互いに60°で交わるX方向、Y方向、Z方向で軸方向が設定される場合などには、60°や120°の内角や外角をもつ、菱形、平行四辺形、三角形、六角形などの横断面形状の角筒を採用することもできる(図示していない)。
(c) また、前記アタッチメント20の実施態様において、アタッチメント本体21は、上端から下端まで同一断面の筒型としたが、上部22に側面(平坦側面)25を形成して、下部23に既製杭1の鋼管10と接合する第二貫通孔26、26を形成できれば、上部22と下部23とで、断面形状を変えることもできる。
例えば、上部22を横断面正方形として、下部23を既製杭1の鋼管10の突出部12の外面12b側に緩く嵌装できる横断面正方形の形状とすることもできる(図2(a)〜(f))。この場合には、下部23の横断面円形の部分に第二権通孔26、26を形成する。
(d) また、前記アタッチメント20の実施態様において、アタッチメント20の上部22に側面(平坦側面)25を形成して、下部23に第二貫通孔26、26を形成したが、下部23に側面(平坦側面)25を形成して、上部22に第二貫通孔26を形成することもできる(図示していない)。
(e) また、前記アタッチメント20の実施態様において、既製杭1の鋼管10の突出部12の内面12aに、アタッチメント20の下端部23を挿入する場合には、鋼管10の突出部12の内径D02に対応した一辺の長さL4の本体21を有するアタッチメント20とする(図1(e))。
(3) Other configuration of the attachment 20 (a) In the embodiment of the attachment 20, the attachment main body 21 is composed of a square tube having an inner dimension of one side L1 that can loosely inscribe a circle having an outer diameter D01. This is preferable because the alignment of the first through-hole 13 and the second through-hole 26 of the steel pipe 10 of the pile 1 and the fixing work with the bolts are facilitated, but the core of the ready-made pile 1 has shifted to the extent permitted by design. In some cases, a looseness to absorb this may be included. Furthermore, when it is not necessary to make the steel pipe 10 of the ready-made pile 1 and the axis center of the attachment 20 correspond, the inner surface 21a of the attachment main body 21 and the outer surface 12b of the protrusion 12 of the steel pipe 10 of the ready-made pile 1 are further The gap can be increased.
(B) In the embodiment of the attachment 20, the attachment body 21 is configured from a square tube having a square cross section. However, the cross section may be a rectangle. In the case where the axial direction is set in the X, Y, and Z directions intersecting at 60 ° with each other based on the triangle, the rhombus or parallelogram with an internal angle or external angle of 60 ° or 120 ° It is also possible to adopt a square tube having a cross-sectional shape such as a triangle or a hexagon (not shown).
(C) In the embodiment of the attachment 20, the attachment main body 21 has a cylindrical shape with the same cross section from the upper end to the lower end, but the side surface (flat side surface) 25 is formed on the upper portion 22, and the ready-made pile is formed on the lower portion 23. If the 2nd through-holes 26 and 26 joined with the 1 steel pipe 10 can be formed, a cross-sectional shape can also be changed with the upper part 22 and the lower part 23. FIG.
For example, the upper portion 22 can be a square in cross section, and the lower portion 23 can be in the shape of a square in cross section that can be loosely fitted on the outer surface 12b side of the protrusion 12 of the steel pipe 10 of the ready-made pile 1 (FIGS. 2A to 2 ( f)). In this case, the second right through holes 26 are formed in the circular portion of the lower portion 23 in the cross section.
(D) In the embodiment of the attachment 20, the side surface (flat side surface) 25 is formed on the upper portion 22 of the attachment 20 and the second through holes 26 and 26 are formed on the lower portion 23. It is also possible to form the second through hole 26 in the upper portion 22 (not shown) by forming a flat side surface 25.
(E) In the embodiment of the attachment 20, when the lower end 23 of the attachment 20 is inserted into the inner surface 12 a of the protrusion 12 of the steel pipe 10 of the ready-made pile 1, the inner diameter D02 of the protrusion 12 of the steel pipe 10. It is set as the attachment 20 which has the main body 21 of the length L4 of one side corresponding to (FIG.1 (e)).

3.施工方法 3. Construction method

(1) 通常の既製杭1の施工と同様に、地面31から杭穴32を掘削して、所定数の下部既製杭(下杭)33、33を連結しながら埋設して、最上段の下部既製杭33の上に、既製杭(上杭)1を連結する(図4(a))。なお、従来と同様に、いわゆる中掘工法として、既製杭1、33を連結しながら杭穴32を掘削しつつ連結した下部既製杭33、33、既製杭1を埋設することもできる。
(2) 続いて、地面31を所定深さまで掘って、形成予定のフーチングの下面に対応した整地面34を形成する。整地面34の形成の後または前、あるいは同時に、鋼管10の突出部12で内面のコンクリート16を除去する、また、必要ならば、突出端板14も除去する(図4(b))。この状態まで鋼管10の内面にコンクリート16が位置しているので、第一貫通孔13、13はコンクリート16に塞がれているので、埋設中に掘削泥土などで、第一貫通孔13、13が塞がれることを防止でき、第一貫通孔13、13の清掃が容易となる。
続いて、鋼管10の突出部12の外周側にアタッチメント20の下部23を被せて、第一貫通孔13、13と第二貫通孔26、26とを連通させる。この際、第一貫通孔13と第二貫通孔26とは横方向の長孔で、かつ上下に等間隔H0を空けてあるので、アタッチメント20の側面(平坦側面)25を鉛直とし、かつ水平方向で所定の方向に一致させつつ、第一貫通孔13と第二貫通孔26の連通作業を正確でかつ簡略にすることができる。
(3) 続いて、第一貫通孔13と第二貫通孔26とを連通させたまま、第一貫通孔13と第二貫通孔26の周囲で、鋼管10の内面12aにワッシャー板(固定手段)36、アタッチメント20の外面21bにワッシャー板(固定手段)37を宛てて、ワッシャー板(固定手段)36側からボルト(固定手段)38をワッシャー板(固定手段)37、第一貫通孔13、第二貫通孔26、ワッシャー板(固定手段)37と挿通して、ナット(固定手段)39を螺合緊結する。これにより、既製杭1の鋼管10の突出部12とアタッチメント20が強固に固定される。以上のようにして、フーチング一体の基礎杭構造50を構成する(図4(c))。
続いて、アタッチメント20の側面25に、H型鋼からなるフーチング用の地中梁(フーチング構造体)41の一端を固定する(図4(d))。また、その他必要なフーチングの配筋をして、コンクリートを打設して、フーチングを構成する(図示していない)。
(4) なお、第一貫通孔13、第二貫通孔26は総ての8箇所で連通させて、ボルト38を挿入したが、少なくとも連通した2組の第一貫通孔13、第二貫通孔26にボルト38を挿入して固定すればよい(図示していない)。
(1) Similar to the construction of a normal ready-made pile 1, a pile hole 32 is excavated from the ground 31, and a predetermined number of lower ready-made piles (lower piles) 33, 33 are connected and buried, and the lowermost part of the uppermost stage The ready-made pile (upper pile) 1 is connected on the ready-made pile 33 (FIG. 4A). Similarly to the conventional method, as a so-called medium digging method, the lower ready-made piles 33 and 33 and the ready-made pile 1 connected while excavating the pile hole 32 while connecting the ready-made piles 1 and 33 can be embedded.
(2) Subsequently, the ground 31 is dug to a predetermined depth to form the leveling ground 34 corresponding to the lower surface of the footing to be formed. After, before or simultaneously with the formation of the leveling surface 34, the concrete 16 on the inner surface is removed by the projecting portion 12 of the steel pipe 10, and if necessary, the projecting end plate 14 is also removed (FIG. 4 (b)). Since the concrete 16 is located on the inner surface of the steel pipe 10 up to this state, the first through holes 13 and 13 are blocked by the concrete 16. Can be prevented and the first through holes 13 and 13 can be easily cleaned.
Then, the lower part 23 of the attachment 20 is covered on the outer peripheral side of the protrusion part 12 of the steel pipe 10, and the 1st through-holes 13 and 13 and the 2nd through-holes 26 and 26 are connected. At this time, the first through-hole 13 and the second through-hole 26 are laterally long holes and are equally spaced H0 up and down, so that the side surface (flat side surface) 25 of the attachment 20 is vertical and horizontal. The communication operation of the first through hole 13 and the second through hole 26 can be made accurate and simple while matching the direction with a predetermined direction.
(3) Subsequently, the washer plate (fixing means) is fixed to the inner surface 12a of the steel pipe 10 around the first through hole 13 and the second through hole 26 while the first through hole 13 and the second through hole 26 are communicated with each other. 36) The washer plate (fixing means) 37 is directed to the outer surface 21b of the attachment 20, and the bolt (fixing means) 38 is attached from the washer plate (fixing means) 36 side to the washer plate (fixing means) 37, the first through hole 13, The nut (fixing means) 39 is screwed and fastened through the second through hole 26 and the washer plate (fixing means) 37. Thereby, the protrusion part 12 and the attachment 20 of the steel pipe 10 of the ready-made pile 1 are fixed firmly. The footing-integrated foundation pile structure 50 is configured as described above (FIG. 4C).
Subsequently, one end of an underground beam (footing structure) 41 for footing made of H-shaped steel is fixed to the side surface 25 of the attachment 20 (FIG. 4D). Further, other necessary footing is arranged and concrete is placed to form the footing (not shown).
(4) The first through-hole 13 and the second through-hole 26 are communicated at all eight places and the bolts 38 are inserted, but at least the two sets of the first through-hole 13 and the second through-hole communicated. A bolt 38 may be inserted into and fixed to 26 (not shown).

4.他の実施態様 4). Other embodiments

(1) 前記実施態様において、フーチング構造体としてH型鋼からなる地中梁としたが、通常使用される他の断面形状の鉄骨または鉄筋などの鋼材とすることもできる(図示していない)。 (1) In the said embodiment, although it was set as the underground beam which consists of H-shaped steel as a footing structure body, it can also be used as steel materials, such as a steel frame or a reinforcing bar of the other cross-sectional shape used normally (not shown).

(2) また、前記実施態様において、予めアタッチメント20の側面25、25にフーチング構造体片(フーチング構造体の端部)を固定して、アタッチメント20を構成することもできる(図示していない)。この場合には、隣接するアタッチメント20、20間で、フーチング構造体片間にフーチング構造体を架設して固定する。 (2) In the above-described embodiment, the attachment 20 can be configured by fixing a footing structure piece (an end portion of the footing structure) to the side surfaces 25 and 25 of the attachment 20 in advance (not shown). . In this case, between the adjacent attachments 20, 20, the footing structure is laid between the footing structure pieces and fixed.

(3) また、前記実施態様において、アタッチメント20の内側に、さらに地上構造物の柱(通常は鉄骨製)42の下端部を嵌挿して固定することもできる(図4(c)(d)鎖線図示42)。 (3) Moreover, in the said embodiment, the lower end part of the column (usually steel-made) 42 of a ground structure can also be inserted and fixed inside the attachment 20 (FIG.4 (c) (d)). Chain line 42).

(4) また、前記実施態様において、アタッチメント20の側面25に地中梁41を固定したが、これを省略して、アタッチメント20の内側に、地中梁41を固定した柱(通常は鉄骨製)42の下端部を嵌挿して固定することもできる(図5(a)〜(c))。また、この場合、アタッチメント20の外側に、地中梁41を固定した柱(通常は鉄骨製)42の下端部を嵌装して固定することもできる(図示していない)。 (4) Moreover, in the said embodiment, although the underground beam 41 was fixed to the side surface 25 of the attachment 20, this was abbreviate | omitted, and the pillar (usually steel-made) which fixed the underground beam 41 inside the attachment 20 ) 42 can also be inserted and fixed (FIGS. 5A to 5C). In this case, the lower end of a column (usually made of steel) 42 to which the underground beam 41 is fixed can be fitted and fixed to the outside of the attachment 20 (not shown).

(5) また、前記実施態様において、既製杭1の鋼管10に第一貫通孔13、アタッチメント20に第二貫通孔26を、それぞれ対応させて、軸周りに回転対称に4箇所(角度90°毎)設け、かつ上下に間隔H0を空けて2段に配置したが、第一貫通孔13または第二貫通穴26が、アタッチメント20に第二貫通孔26を、それぞれ対応させて、軸周りに回転対称に4つで上下2段に設けたが、第一貫通孔13および第二貫通孔26は、少なくとも2つ形成されていれば良い(図示していない)。 (5) Moreover, in the said embodiment, the 1st through-hole 13 is made to respond | correspond to the steel pipe 10 of the ready-made pile 1, and the 2nd through-hole 26 is made to correspond to the attachment 20, respectively, and four places (angle 90 degrees) are rotationally symmetrical around an axis | shaft. Provided) and arranged in two stages with a vertical interval H0. The first through hole 13 or the second through hole 26 corresponds to the attachment 20 and the second through hole 26, respectively. Although four rotationally symmetrically provided in two upper and lower stages, it is sufficient that at least two first through holes 13 and second through holes 26 are formed (not shown).

(6) また、前記実施態様において、固定手段として、ボルト38、ナット39などを使用したが、リベット類や各種ピン類など、貫通孔同士を使って2枚の板材を固定する際に、通常使用される各種の部材を使用することもできる(図示していない)。 (6) In the above embodiment, bolts 38, nuts 39 and the like are used as the fixing means. However, when fixing two plate materials using through holes such as rivets and various pins, it is usual. The various members used can also be used (not shown).

(7) また、前記実施態様において、アタッチメント20を省略して、既製杭1の鋼管10の突出部12の内側に、地中梁41を固定した柱(通常は鉄骨製)42の下端部を嵌挿して固定することもできる(図6(a)〜(c))。
この場合、前記実施態様と同様に、地面31から杭穴32を掘削して、所定数の既製杭(下杭)33、33を連結しながら埋設して、一番上に、既製杭(上杭)1を連結する(図6(a))。続いて、地面31を所定深さまで掘って、形成予定のフーチングの下面に対応した整地面34を形成する。整地面34の形成の後または前、あるいは同時に、鋼管10の突出部12で内面のコンクリート16を除去し、突出端板14も除去する(図6(b))。続いて、鋼管10の突出部12の内側に、上部構造の柱42を挿入して、柱42と鋼管10を溶接などで固定して、基礎杭構造50とする(図6(c)。この場合、予めまたはその後、柱42に地中梁41を通常の方法で固定する。また、この場合、柱42の下端を下端板3に当てれば、柱42と鋼管10の接合作業が容易にできる。
また、この場合、鋼管10の突出部12の外側に、地中梁41を固定した柱(通常は鉄骨製)42の下端部を嵌装して固定することもできる(図示していない)。この場合には、コンクリート16を除去できれば、突出端板14の除去は不要である。
また、アタッチメント20を省略する場合には、第一貫通孔13、13を省略することもできる(図6)。また、アタッチメントを省略する場合、鋼管10の上部を角筒(断面正方形、六角形などアタッチメントと同様)とすれば、上部構造物と接続作業が容易になる(図示していない)。
(7) Moreover, in the said embodiment, the attachment 20 is abbreviate | omitted and the lower end part of the column (usually steel-made) 42 which fixed the underground beam 41 inside the protrusion part 12 of the steel pipe 10 of the ready-made pile 1 is carried out. It can also be inserted and fixed (FIGS. 6A to 6C).
In this case, as in the above embodiment, a pile hole 32 is excavated from the ground 31, and a predetermined number of ready-made piles (lower piles) 33, 33 are buried and connected to the top. The piles 1 are connected (FIG. 6A). Subsequently, the ground 31 is dug to a predetermined depth to form the leveling ground 34 corresponding to the lower surface of the footing to be formed. After or before the formation of the leveling surface 34, or simultaneously, the concrete 16 on the inner surface is removed by the projecting portion 12 of the steel pipe 10, and the projecting end plate 14 is also removed (FIG. 6B). Subsequently, the upper structure pillar 42 is inserted inside the protruding portion 12 of the steel pipe 10, and the pillar 42 and the steel pipe 10 are fixed by welding or the like to form the foundation pile structure 50 (FIG. 6C). In this case, the underground beam 41 is fixed to the column 42 by a normal method in advance or afterwards.In this case, if the lower end of the column 42 is applied to the lower end plate 3, the joining work between the column 42 and the steel pipe 10 can be facilitated. .
In this case, the lower end portion of a column (usually made of steel) 42 to which the underground beam 41 is fixed can be fitted and fixed to the outside of the protruding portion 12 of the steel pipe 10 (not shown). In this case, if the concrete 16 can be removed, it is not necessary to remove the protruding end plate 14.
Moreover, when the attachment 20 is abbreviate | omitted, the 1st through-holes 13 and 13 can also be abbreviate | omitted (FIG. 6). Moreover, when omitting an attachment, if the upper part of the steel pipe 10 is a square tube (similar to the attachment such as a square cross section and a hexagon), the connection work with the upper structure is facilitated (not shown).

1 既製杭
2 既製杭の杭本体
3 杭本体の上端板
4 杭本体の下端板
5 杭本体のコンクリート
10 鋼管
11 鋼管の基部
12 鋼管の突出部
12a 鋼管の内面
12b 鋼管の外面
13 鋼管の第一貫通孔
14 突出端板
16 コンクリート(保護筒体)
20 アタッチメント
21 アタッチメントの本体
21a 本体の内面
21b 本体の外面
22 アタッチメント本体の上部
23 アタッチメント本体の下部
25 アタッチメントの側面(平坦側面)
26 アタッチメントの第二貫通孔
31 地面
32 杭穴
33 既製杭(下杭)
34 整地面
36 ワッシャー板(固定手段)
37 ワッシャー板(固定手段)
38 ボルト(固定手段)
39 ナット(固定手段)
41 地中梁(フーチング構造体)
42 柱(フーチング構造体)
50 フーチング一体の基礎杭構造
DESCRIPTION OF SYMBOLS 1 Ready-made pile 2 Pile body of ready-made pile 3 Upper end plate of pile body 4 Lower end plate of pile body 5 Concrete of pile body 10 Steel pipe 11 Steel pipe base 12 Steel pipe protrusion 12a Steel pipe inner surface 12b Steel pipe outer surface 13 Steel pipe first Through hole 14 Projecting end plate 16 Concrete (protective cylinder)
20 Attachment 21 Attachment body 21a Body inner surface 21b Body outer surface 22 Upper part of attachment body 23 Lower part of attachment body 25 Side of attachment (flat side)
26 Second through hole 31 of attachment 31 Ground 32 Pile hole 33 Ready-made pile (lower pile)
34 Ground leveling 36 Washer plate (fixing means)
37 Washer plate (fixing means)
38 bolts (fixing means)
39 Nut (fixing means)
41 Underground beam (footing structure)
42 Pillar (footing structure)
50 Foundation pile structure with one footing

Claims (7)

杭穴内に既製杭を埋設して、以下のようにして前記既製杭の上端部にフーチング構造体を構築したことを特徴とするフーチング一体の基礎杭構造。
(1) 前記既製杭は、「コンクリート製の杭本体の外周を鋼管で被覆した既製杭であって、前記鋼管の上端部を前記杭本体の上端より突出させた既製杭」または「コンクリート製の本体上に鋼管を連結した既製杭」とし、前記鋼管の上端部に予め、複数の第一貫通孔を形成した。
(2) 前記既製杭の上端部であって、鋼管内又は鋼管の外周側に、少なくとも上部又は下部に平坦側面を有する角筒部を形成した鋼製のアタッチメントを配置して、前記アタッチメントに設けた第二貫通孔と前記第一貫通孔とを連通させ、前記第一貫通孔と前記第二貫通孔とに固定手段を挿通して、前記鋼管の上端部に前記アタッチメントを固定した。
(3) 前記第一貫通孔と第二貫通孔の少なくとも一方を横方向の長孔とした。
(4) 前記アタッチメントの角筒部の前記平坦側面に前記フーチングの構造体を固定した。
A foot pile-integrated foundation pile structure in which a ready-made pile is buried in a pile hole and a footing structure is constructed at the upper end of the ready-made pile as follows.
(1) The ready-made pile is “a ready-made pile in which the outer periphery of a concrete pile body is covered with a steel pipe, and an upper end portion of the steel pipe is protruded from an upper end of the pile body” or “a concrete pile. A plurality of first through holes were formed in advance on the upper end portion of the steel pipe.
(2) At the upper end of the ready-made pile, a steel attachment in which a square tube part having a flat side surface is formed at least at the upper part or the lower part is arranged in the steel pipe or on the outer peripheral side of the steel pipe, and provided in the attachment. The second through hole communicated with the first through hole, a fixing means was inserted into the first through hole and the second through hole, and the attachment was fixed to the upper end portion of the steel pipe.
(3) At least one of the first through hole and the second through hole is a laterally long hole.
(4) The footing structure is fixed to the flat side surface of the rectangular tube portion of the attachment.
以下のように構成したことを特徴とする請求項1に記載のフーチング一体の基礎杭構造。
(1) 既製杭を「コンクリート製の杭本体の外周を鋼管で被覆した既製杭であって、前記鋼管の上端部を前記杭本体の上端より突出させた既製杭」とした。
(2) 前記鋼管の内面であって、前記杭本体より上方に、前記杭本体と略同一断面形状の保護筒体を設置して、前記保護筒体の外面を前記鋼管の内面に密着して、前記鋼管の第一貫通孔を塞いだ状態で、杭穴内に埋設した。
(3) 前記既製杭の埋設が完了した状態で、前記保護筒体を除去して、前記既製杭にアタッチメントを固定した。
The foot pile-integrated foundation pile structure according to claim 1, wherein the foundation pile structure is configured as follows.
(1) The ready-made pile was defined as “a ready-made pile in which the outer periphery of a concrete pile body was covered with a steel pipe, and the upper end portion of the steel pipe was protruded from the upper end of the pile body”.
(2) An inner surface of the steel pipe, and a protective cylinder having substantially the same cross-sectional shape as the pile main body is installed above the pile main body, and the outer surface of the protective cylinder is in close contact with the inner surface of the steel pipe. The steel pipe was buried in a pile hole with the first through hole of the steel pipe closed.
(3) In the state where the laying of the ready-made pile was completed, the protective cylinder was removed, and an attachment was fixed to the ready-made pile.
以下のように構成したことを特徴とする請求項1に記載のフーチング一体の基礎杭構造。
(1) アタッチメントを横断面が正方形の角筒からなり、下部に横方向の長孔からなる第二貫通孔を設けた。
(2) 前記アタッチメントの下部内面は、既製杭の上端部を緩く嵌合できる形状とした。
The foot pile-integrated foundation pile structure according to claim 1, wherein the foundation pile structure is configured as follows.
(1) The attachment was made of a square tube having a square cross section, and a second through-hole made of a transverse long hole was formed at the bottom.
(2) The lower inner surface of the attachment has a shape capable of loosely fitting the upper end of the ready-made pile.
杭穴内に既製杭を埋設して、以下のようにして前記既製杭の上端部にフーチング構造体を構築したことを特徴とするフーチング一体の基礎杭構造。
(1) 前記既製杭は、「コンクリート製の本体の外周を鋼管で被覆した既製杭であって、前記鋼管の上端部を前記本体の上端より突出させた既製杭」または「コンクリート製の杭本体上に鋼管を連結した既製杭」とした。
(2) 前記鋼管の内面であって、前記杭本体より上方に、除去容易の保護筒体を配置した。
(3) 前記既製杭を埋設した後に、前記保護筒体を除去して、前記鋼管の上端部に前記フーチングの構造体を固定した。
A foot pile-integrated foundation pile structure in which a ready-made pile is buried in a pile hole and a footing structure is constructed at the upper end of the ready-made pile as follows.
(1) The ready-made pile is “a ready-made pile in which the outer periphery of a concrete main body is covered with a steel pipe, and an upper end portion of the steel pipe protrudes from an upper end of the main body” or “a concrete pile main body. It was designated as a ready-made pile with a steel pipe connected on top.
(2) An easily removable protective cylinder is disposed on the inner surface of the steel pipe and above the pile body.
(3) After burying the ready-made pile, the protective cylinder was removed, and the footing structure was fixed to the upper end of the steel pipe.
以下のように構成したことを特徴とする請求項1または4記載のフーチング一体の基礎杭構造。
(1) 既製杭は、下端に他の既製杭との連結用の下端板を設けるとともに、杭本体の上端に上端板を設け、かつ鋼管の上端に突出端板を設けた。
(2) 杭穴内に、他のコンクリート製の下部既製杭を埋設して、該下部コンクリート上に既製杭を連結した。
5. The footing-integrated foundation pile structure according to claim 1, wherein the foundation pile structure is configured as follows.
(1) The ready-made pile was provided with a lower end plate for connection with other ready-made piles at the lower end, an upper end plate at the upper end of the pile body, and a protruding end plate at the upper end of the steel pipe.
(2) Another concrete-made lower ready-made pile was buried in the pile hole, and the ready-made pile was connected on the lower concrete.
杭穴内に、既製杭を埋設して、以下のように前記既製杭の上端部に、鋼製のアタッチメントを介してフーチング構造体を構築することを特徴としたフーチング一体の基礎杭の構築方法。
(1) 前記既製杭を以下のように構成する。
(a) コンクリート製の杭本体の外周を鋼管で被覆して、前記鋼管の上端部を前記杭本体の上端より上方に突出させる。
(b) 鋼管の上端部に複数の第一貫通孔を形成する。
(c) 前記杭本体の上端に、前記杭本体と略同一断面形状の保護筒体を、着脱可能に設置して、前記保護筒体の外面を前記鋼管の内面に密着させ、前記鋼管の第一貫通孔を塞いだ状態としてある。
(2) 前記アタッチメントは、上部及び下部からなり、少なくとも前記上部が平坦側面を有する四角筒で形成され、「前記下部が前記既製杭の前記鋼管内に緩く嵌挿でき、あるいは前記鋼管の外周に緩く嵌装できる形状とし」かつ「前記下部に横方向の長孔からなる第二貫通孔を形成する。」
(3) 所定の杭穴を掘削して、あるいは杭穴を掘削しつつ、前記杭穴内に、前記保護筒体を有する既製杭を埋設する。
(4) 前記既製杭を所定深さに埋設した後、前記既製杭から前記保護筒体を取り外し、前記鋼管の上端部の内面および第一貫通孔を露出させる。
(5) 前記鋼管内又は鋼管の外周側に、前記アタッチメントを設置し、前記アタッチメントに設けた第二貫通孔と前記第一貫通孔とを連通させ、前記第一貫通孔と前記第二貫通孔とに固定手段を挿通して、前記鋼管の上端部に前記アタッチメントを固定する。
(6) 前記鋼製アタッチメントの上部の平坦側面に前記フーチング構造体を固定する。
A method for constructing a footing-integrated foundation pile characterized by burying a ready-made pile in a pile hole and constructing a footing structure at the upper end of the ready-made pile through a steel attachment as follows.
(1) The ready-made pile is constructed as follows.
(a) The outer periphery of a concrete pile body is covered with a steel pipe, and the upper end portion of the steel pipe protrudes above the upper end of the pile body.
(b) A plurality of first through holes are formed at the upper end of the steel pipe.
(c) At the upper end of the pile main body, a protective cylinder having substantially the same cross-sectional shape as the pile main body is detachably installed, the outer surface of the protective cylinder is brought into close contact with the inner surface of the steel pipe, One through hole is closed.
(2) The attachment is composed of an upper part and a lower part, and at least the upper part is formed of a square cylinder having a flat side surface, and "the lower part can be loosely inserted in the steel pipe of the ready-made pile, or on the outer periphery of the steel pipe. “A shape that can be loosely fitted” and “a second through hole made of a transverse long hole is formed in the lower portion.”
(3) A pre-made pile having the protective cylinder body is buried in the pile hole while excavating a predetermined pile hole or excavating the pile hole.
(4) After burying the ready-made pile to a predetermined depth, the protective cylinder is removed from the ready-made pile, and the inner surface and the first through hole of the upper end portion of the steel pipe are exposed.
(5) The attachment is installed in the steel pipe or on the outer peripheral side of the steel pipe, the second through hole provided in the attachment and the first through hole are communicated, and the first through hole and the second through hole And fixing the attachment to the upper end of the steel pipe.
(6) The footing structure is fixed to the flat side surface at the top of the steel attachment.
杭穴内に、既製杭を埋設して、以下のように前記既製杭の上端部にフーチング構造体を構築することを特徴としたフーチング一体の基礎杭の構築方法。
(1) 前記既製杭を以下のように構成する。
(a) コンクリート製の杭本体の外周を鋼管で被覆して、前記鋼管の上端部を前記杭本体の上端より上方に突出させる。
(b) 前記杭本体の上端に、前記杭本体と略同一断面形状の保護筒体を、着脱可能に設置して、前記保護筒体の外面を前記鋼管の内面に密着させた状態としてある。
(2 ) 所定の杭穴を掘削して、あるいは杭穴を掘削しつつ、前記杭穴内に、前記保護筒体を有する既製杭を埋設する。
(3) 前記既製杭を所定深さに埋設した後、前記既製杭から前記保護筒体を取り外し、前記鋼管の上端部の内面を露出させる。
(4) 前記鋼管の上端部の内面又は外面に、前記フーチング構造体を固定する。
A method for constructing a footing-integrated foundation pile characterized by burying a ready-made pile in a pile hole and constructing a footing structure at the upper end of the ready-made pile as follows.
(1) The ready-made pile is constructed as follows.
(a) The outer periphery of a concrete pile body is covered with a steel pipe, and the upper end portion of the steel pipe protrudes above the upper end of the pile body.
(b) A protective cylinder having substantially the same cross-sectional shape as the pile main body is detachably installed at the upper end of the pile main body, and the outer surface of the protective cylinder is in close contact with the inner surface of the steel pipe.
(2) A pre-made pile having the protective cylinder is embedded in the pile hole while excavating a predetermined pile hole or excavating the pile hole.
(3) After burying the ready-made pile to a predetermined depth, the protective cylinder is removed from the ready-made pile and the inner surface of the upper end portion of the steel pipe is exposed.
(4) The footing structure is fixed to the inner surface or the outer surface of the upper end portion of the steel pipe.
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Publication number Priority date Publication date Assignee Title
CN106917400A (en) * 2017-03-03 2017-07-04 苏州中材建设有限公司 A kind of antidetonation corrosion resistant pile for prestressed pipe and preparation method thereof
CN111778966A (en) * 2020-07-06 2020-10-16 常州市建筑科学研究院集团股份有限公司 Prefabricated energy pile and manufacturing method thereof
JP2020183640A (en) * 2019-05-07 2020-11-12 日本製鉄株式会社 Joint structure of pile head portion, and foundation structure
CN115142458A (en) * 2022-07-27 2022-10-04 广州市市政工程设计研究总院有限公司 Pile foundation capable of controlling horizontal deformation and construction method

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JP2002309589A (en) * 2001-04-11 2002-10-23 Nippon Steel Corp Structure for joining foundation to footing beam
JP2012162983A (en) * 2012-04-27 2012-08-30 Sumitomo Metal Ind Ltd Foundation pile structure, precast concrete pile, and joint hardware for precast concrete pile and steel pipe pile

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JPS58103233U (en) * 1981-12-29 1983-07-13 鹿島建設株式会社 Pile head processing structure
JP2002038474A (en) * 2000-07-31 2002-02-06 Geotop Corp Method for forming space in pile top in which hardening material flows and space forming implement used therefor
JP2002309589A (en) * 2001-04-11 2002-10-23 Nippon Steel Corp Structure for joining foundation to footing beam
JP2012162983A (en) * 2012-04-27 2012-08-30 Sumitomo Metal Ind Ltd Foundation pile structure, precast concrete pile, and joint hardware for precast concrete pile and steel pipe pile

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106917400A (en) * 2017-03-03 2017-07-04 苏州中材建设有限公司 A kind of antidetonation corrosion resistant pile for prestressed pipe and preparation method thereof
CN106917400B (en) * 2017-03-03 2018-09-07 苏州中材建设有限公司 A kind of antidetonation corrosion resistant pile for prestressed pipe and preparation method thereof
JP2020183640A (en) * 2019-05-07 2020-11-12 日本製鉄株式会社 Joint structure of pile head portion, and foundation structure
JP7233295B2 (en) 2019-05-07 2023-03-06 日本製鉄株式会社 Pile head connection structure and foundation structure
CN111778966A (en) * 2020-07-06 2020-10-16 常州市建筑科学研究院集团股份有限公司 Prefabricated energy pile and manufacturing method thereof
CN115142458A (en) * 2022-07-27 2022-10-04 广州市市政工程设计研究总院有限公司 Pile foundation capable of controlling horizontal deformation and construction method

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