JP2008081985A - Pile and pile head anchoring structure - Google Patents

Pile and pile head anchoring structure Download PDF

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JP2008081985A
JP2008081985A JP2006261694A JP2006261694A JP2008081985A JP 2008081985 A JP2008081985 A JP 2008081985A JP 2006261694 A JP2006261694 A JP 2006261694A JP 2006261694 A JP2006261694 A JP 2006261694A JP 2008081985 A JP2008081985 A JP 2008081985A
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pile
pile head
reinforcing bar
rebar
flange
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JP4778386B2 (en
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Katsuya Tanaka
勝也 田中
Yasuyuki Hirakawa
泰行 平川
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Nippon Concrete Industries Co Ltd
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Nippon Concrete Industries Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a pipe and a pile head anchoring structure, which enable a pile head anchoring bar to be easily constructed even by manual operations, and which can obtain high reliability. <P>SOLUTION: An SC pile 11 is equipped with a pile body 12 which is molded from concrete, and an outer-shell steel pipe 13. A flange metal 14, which is formed with a diameter larger than that of the outer-shell steel pipe 13, is full-strength-welded to the end of the outer-shell steel pipe 13. A plurality of reinforcement fastening holes 16 for fastening the pile head anchoring bars 15 are provided along the outer peripheral edge of the flange metal 14. Each of the pile head anchoring bars 15 has screw portions 17 and 18 formed in the lower and top portions of a deformed bar; nuts 21 and 22 as fastening means are screwed to the lower screw portion 17; and an anchoring nut 23 as an anchoring member is screwed to the top screw portion 18. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は、杭頭定着鉄筋が締着される杭および杭頭定着構造に関する。   The present invention relates to a pile to which a pile head fixing rebar is fastened and a pile head fixing structure.

既製の外殻鋼管付きコンクリート杭(以下、SC杭という)の杭頭に、フーチングなどの他の構造物を接合するに当たって、SC杭の外周鋼管部などに所謂ひげ鉄筋と呼ばれる杭頭定着鉄筋を現場で溶接する方法が一般的である。   When joining other structures such as footings to the pile heads of ready-made concrete piles with outer shell steel pipes (hereinafter referred to as SC piles) In-situ welding is common.

通常、SC杭は、杭径の割に曲げ耐力が大きく、杭頭定着鉄筋の本数が多い。   Normally, SC piles have a large bending strength for the pile diameter, and the number of pile head anchoring reinforcing bars is large.

現場は、地下水位以深まで根切りすることが多く、根切り後の杭頭定着鉄筋取付工事で、水分の多い所でフレア溶接、あるいはスタッド溶接をしている(例えば、特許文献1参照)。
特許第3088385号公報(第1−2頁、図1−3)
The site is often rooted deeper than the groundwater level, and flare welding or stud welding is performed in places with a lot of moisture in the pile head fixing rebar installation work after root cutting (see, for example, Patent Document 1).
Japanese Patent No. 3088385 (page 1-2, Fig. 1-3)

フレア溶接は、手作業で行なえることから一般的であるが、信頼性が低く、天候に左右されたり、不完全溶接となる場合が多い。しかも、鉄筋本数が多く、鉄筋間隔が狭いため、良好なフレア溶接をすることが困難である。また、杭頭定着鉄筋を良好にフレア溶接するために、基礎底を10cm〜20cm余計に掘り下げ、捨てコンクリートを打つ現場がある。さらに、マンションなどのピットが多い所はその深度がまちまちで、各基礎底段掘りして水処理に手間暇がかかっている。   Flare welding is common because it can be performed manually, but is unreliable, often affected by the weather, or often incomplete. In addition, since the number of reinforcing bars is large and the interval between the reinforcing bars is narrow, it is difficult to perform good flare welding. In addition, there is a site where the foundation bottom is dug down to an extra 10cm to 20cm and concrete is thrown away for the purpose of flaring well the pile head anchoring rebar. Furthermore, places with many pits such as condominiums vary in depth, and it takes time and effort to dig the bottom of each foundation and treat the water.

一方、スタッド溶接は、機械溶接で信頼性が高いが、杭体の天端側金物(座板)を厚板として裏面にリブや鉄筋を立てたりして、大幅に補強する必要があるので、フレア溶接ほど一般的ではない。   On the other hand, stud welding is highly reliable by mechanical welding, but it is necessary to reinforce it by using ribs and reinforcing bars on the back surface with the top end side hardware (seat plate) of the pile body as a thick plate, Not as common as flare welding.

このように、SC杭の杭頭補強において、杭頭定着鉄筋をフレア溶接で設置して補強をすることが一般的であるが、上記のようにSC杭は、杭径の割に曲げ耐力が大きく、従来のフレア溶接方式では、鉄筋を配置できないケースがあること、また、今後このフレア溶接方式が原則禁止の動きがあり、SC杭へのフレア溶接方式の使用に大きな障害となるため、これに代わり、手作業でも杭頭定着鉄筋を容易に施工できる杭および杭頭定着構造が要求されている。   Thus, in the pile head reinforcement of SC piles, it is common to reinforce pile head fixing rebars by flaring welding. However, as described above, SC piles have a bending strength for the pile diameter. There are cases where reinforcing bars cannot be placed with the conventional flare welding method, and this flare welding method will be prohibited in principle in the future, which will be a major obstacle to the use of the flare welding method for SC piles. Instead, piles and pile head anchoring structures that can easily construct pile head anchoring rebars by hand are required.

本発明は、このような点に鑑みなされたもので、手作業でも杭頭定着鉄筋を容易に施工でき、かつ高い信頼性が得られる杭および杭頭定着構造を提供することを目的とする。   This invention is made | formed in view of such a point, and it aims at providing the pile and pile head fixing structure which can construct a pile head fixing reinforcing bar easily also by manual operation, and can obtain high reliability.

請求項1に記載された発明は、コンクリートにより成形された杭本体と、この杭本体の少なくとも杭頭に一体化された金属筒体と、この金属筒体より大径に形成され金属筒体の端部に溶接されたフランジ金物と、このフランジ金物の外周縁に沿って設けられ杭頭定着鉄筋を締着するための複数の鉄筋締着穴とを具備した杭である。   The invention described in claim 1 is a pile main body formed of concrete, a metal cylinder integrated with at least a pile head of the pile main body, and a metal cylinder having a larger diameter than the metal cylinder. A pile including a flange metal welded to an end portion and a plurality of reinforcing bar fastening holes provided along an outer peripheral edge of the flange metal hardware for fastening a pile head fixing reinforcing bar.

請求項2に記載された発明は、請求項1記載の杭における鉄筋締着穴が、フランジ金物の外周縁から径方向に切込み形成されたものである。   In the invention described in claim 2, the reinforcing bar fastening hole in the pile according to claim 1 is formed by cutting in the radial direction from the outer peripheral edge of the flange hardware.

請求項3に記載された発明は、杭頭定着鉄筋は、少なくとも下部にネジ部を形成したものであり、フランジ金物の鉄筋締着穴に杭頭定着鉄筋のネジ部を挿入し、杭頭定着鉄筋のネジ部に螺合された複数のナットをフランジ金物を介して締付けることでフランジ金物に杭頭定着鉄筋を固定した杭頭定着構造である。   According to a third aspect of the present invention, the pile head anchoring reinforcing bar has a threaded portion formed at least in the lower part, and the threaded portion of the pile head anchoring reinforcing bar is inserted into the reinforcing bar fastening hole of the flange hardware to This is a pile head fixing structure in which a pile head fixing rebar is fixed to a flange hardware by tightening a plurality of nuts screwed to a thread portion of the reinforcing bar through the flange hardware.

請求項4に記載された発明は、請求項3記載の杭頭定着構造において、杭頭定着鉄筋の頂部に取付けられた定着部材を具備したものである。   According to a fourth aspect of the present invention, in the pile head fixing structure according to the third aspect, the fixing member attached to the top of the pile head fixing reinforcing bar is provided.

請求項1に記載された発明によれば、杭本体の少なくとも杭頭に一体化された金属筒体より大径に形成されたフランジ金物を金属筒体の端部に溶接して、このフランジ金物の外周縁に沿って複数の鉄筋締着穴を設け、現場では、これらの鉄筋締着穴に杭頭定着鉄筋を取付けるようにしたので、天候や熟練度などに左右される手作業溶接を避けて信頼性の低下を防止でき、手作業でも杭頭定着鉄筋を容易に施工でき、かつ高い信頼性が得られる杭を提供できる。   According to the invention described in claim 1, the flange metal object is welded to the end portion of the metal cylinder body by welding a flange metal object having a larger diameter than the metal cylinder body integrated with at least the pile head of the pile body. A plurality of reinforcing bar fastening holes are provided along the outer periphery of the steel bar. In the field, pile head fixing reinforcing bars are attached to these reinforcing bar fastening holes, so that manual welding that depends on the weather and skill level is avoided. Therefore, it is possible to provide a pile that can prevent deterioration in reliability, can easily construct a pile head fixing rebar by hand, and obtain high reliability.

請求項2に記載された発明によれば、フランジ金物の外周縁から径方向に鉄筋締着穴が切込み形成されたので、鉄筋締着穴より大径のナットを杭頭定着鉄筋に予めセットしたまま杭頭定着鉄筋を径方向外側から鉄筋締着穴に挿入でき、杭頭定着鉄筋の締着作業を容易にできる。   According to the invention described in claim 2, since the reinforcing bar fastening hole is formed in the radial direction from the outer peripheral edge of the flange metal fitting, a nut having a diameter larger than the reinforcing bar fastening hole is set in advance on the pile head fixing reinforcing bar. The pile head fixing rebar can be inserted into the rebar fastening hole from the outside in the radial direction, and the fastening work of the pile head fixing rebar can be facilitated.

請求項3に記載された発明によれば、杭頭定着鉄筋の少なくとも下部に形成したネジ部をフランジ金物の鉄筋締着穴に挿入し、杭頭定着鉄筋のネジ部に螺合された複数のナットをフランジ金物を介して締付けることでフランジ金物に杭頭定着鉄筋を固定したので、天候や熟練度などに左右される手作業溶接を避けて信頼性の低下を防止でき、手作業でも杭頭定着鉄筋を容易に施工でき、かつ高い信頼性が得られる杭頭定着構造を提供できる。   According to the invention described in claim 3, a plurality of screw portions formed at least in the lower portion of the pile head fixing rebar are inserted into the reinforcing bar fastening holes of the flange hardware and screwed into the screw portions of the pile head fixing rebar. Since the pile head anchoring rebar is fixed to the flange hardware by tightening the nut through the flange hardware, it is possible to prevent the deterioration of reliability by avoiding manual welding that depends on the weather and skill level. It is possible to provide a pile head fixing structure in which fixing reinforcing bars can be easily constructed and high reliability can be obtained.

請求項4に記載された発明によれば、杭頭定着鉄筋の頂部に定着部材を取付けることで、杭頭定着鉄筋の定着長を短くでき、さらに短い杭頭定着鉄筋は運搬性に優れている。   According to the invention described in claim 4, the fixing length of the pile head fixing rebar can be shortened by attaching the fixing member to the top of the pile head fixing rebar, and the shorter pile head fixing rebar is excellent in transportability. .

以下、本発明を、図1および図2に示された第1実施の形態、図3に示された第2実施の形態、図4に示された第3実施の形態を参照しながら詳細に説明する。   Hereinafter, the present invention will be described in detail with reference to the first embodiment shown in FIGS. 1 and 2, the second embodiment shown in FIG. 3, and the third embodiment shown in FIG. explain.

図1は、杭としての外殻鋼管付きコンクリート杭(以下、「SC杭11」という)の杭頭部を示し、コンクリートにより成形された杭本体12と、この杭本体12の少なくとも杭頭に一体化された金属筒体としての外殻鋼管13と、この外殻鋼管13より大径に形成され外殻鋼管13の端部に全強溶接されたフランジ金物14と、このフランジ金物14の外周縁に沿って設けられ杭頭定着鉄筋15を締着するための複数の鉄筋締着穴16とを具備している。   FIG. 1 shows a pile head of a concrete pile with an outer shell steel pipe (hereinafter referred to as “SC pile 11”) as a pile. The pile body 12 formed of concrete is integrated with at least the pile head of the pile body 12. Outer steel pipe 13 as a metal tube, a flange metal 14 formed larger in diameter than the outer steel pipe 13 and fully welded to the end of the outer steel pipe 13, and an outer peripheral edge of the flange metal 14 And a plurality of reinforcing bar fastening holes 16 for fastening the pile head fixing reinforcing bars 15.

各々の杭頭定着鉄筋15は、異形鉄筋の下部および頂部にネジ部17,18を形成し、下部のネジ部17に締着手段としてのナット21,22を螺合できるとともに、頂部のネジ部18に定着部材としての定着ナット23を螺合できるようにしたものである。   Each pile head anchoring rebar 15 is formed with screw parts 17 and 18 at the lower part and the top part of the deformed reinforcing bar, and nuts 21 and 22 as fastening means can be screwed to the lower screw part 17 and the screw part at the top part. A fixing nut 23 as a fixing member can be screwed to 18.

図2に示されるように、鉄筋締着穴16は、フランジ金物14の外周縁から径方向に切込み形成されたものである。なお、鉄筋締着穴16は、フランジ金物14の外周縁より内側に穿設された切り穴でも良い。この切り穴は、杭頭定着鉄筋15より大径に形成する。   As shown in FIG. 2, the reinforcing bar fastening hole 16 is formed by cutting in the radial direction from the outer peripheral edge of the flange hardware 14. Note that the reinforcing bar fastening hole 16 may be a cut hole bored inward from the outer peripheral edge of the flange hardware 14. This cut hole is formed to have a larger diameter than the pile head fixing rebar 15.

要するに、SC杭11の杭頭に、杭径より大きい外径のフランジ金物14を溶接し、フランジ金物14の外周部に杭頭定着鉄筋15を取付けるための切込み穴または切り穴を設けたものである。   In short, a flange metal piece 14 having an outer diameter larger than the pile diameter is welded to the pile head of the SC pile 11, and a cut hole or a cut hole for attaching the pile head fixing rebar 15 to the outer peripheral portion of the flange metal piece 14 is provided. is there.

そして、杭頭定着鉄筋15は、異形鉄筋の下部にネジ部17を形成したものであり、フランジ金物14の鉄筋締着穴16に杭頭定着鉄筋15のネジ部17を挿入し、杭頭定着鉄筋15のネジ部17に螺合された複数のナット21,22をフランジ金物14を介して締付けることで、図1に示されるようにフランジ金物14に杭頭定着鉄筋15を固定したSC杭11の杭頭定着構造を構成する。   The pile head anchoring rebar 15 is formed by forming a threaded portion 17 at the bottom of the deformed reinforcing bar. The threaded portion 17 of the pile head anchoring rebar 15 is inserted into the reinforcing bar fastening hole 16 of the flange hardware 14 to fix the pile head. The SC pile 11 in which the pile head fixing rebar 15 is fixed to the flange hardware 14 as shown in FIG. 1 by tightening a plurality of nuts 21 and 22 screwed to the threaded portion 17 of the rebar 15 via the flange hardware 14. Of pile head fixing structure.

このSC杭11の杭頭定着構造は、不完全な溶接とならない機械式溶接と同程度の溶接強度を簡単な方法で確保できるとともに、現場で根切りしながら特殊工の手を要することなく杭頭定着鉄筋15を取付けることができ、しかも、この取付後、簡単に目視で確認できるものである。   The pile head fixing structure of SC pile 11 can secure the same welding strength as mechanical welding that does not result in incomplete welding in a simple way, and it can be piled up without the need for a special worker while rooting on site. The head fixing rebar 15 can be attached, and after this attachment, it can be easily visually confirmed.

各杭頭定着鉄筋15の外周には、複数の帯鉄筋24が配筋され、各杭頭定着鉄筋15の相互間の強度向上が図られている。   A plurality of strip reinforcing bars 24 are arranged on the outer periphery of each pile head fixing rebar 15 to improve the strength between the pile head fixing rebars 15.

図3に示されるように、第2実施の形態は、短尺鋼管で形成された帯板25が、各杭頭定着鉄筋15の外周に配筋され、また、各杭頭定着鉄筋15の頂部には、定着ナット23により定着部材としての定着板26が取付けられて、各杭頭定着鉄筋15の相互間の強度向上と、定着性能の向上が図られた杭頭定着構造である。他の構造は、図1および図2に示されたものと同様であるから、同一部分には同一符号を付して、その説明を省略する。   As shown in FIG. 3, in the second embodiment, a strip 25 formed of a short steel pipe is arranged on the outer periphery of each pile head anchoring reinforcement 15, and at the top of each pile head anchoring reinforcement 15. This is a pile head fixing structure in which a fixing plate 26 as a fixing member is attached by a fixing nut 23 to improve the strength between the pile head fixing reinforcing bars 15 and the fixing performance. Since other structures are the same as those shown in FIGS. 1 and 2, the same parts are denoted by the same reference numerals, and the description thereof is omitted.

図4に示されるように、第3実施の形態は、複数の帯鉄筋24が各杭頭定着鉄筋15の外周に配筋され、また、各杭頭定着鉄筋15の頂部には、定着ナット23により定着部材としての定着リング27が取付けられて、各杭頭定着鉄筋15の相互間の強度向上と、定着性能の向上が図られた杭頭定着構造である。他の構造は、図1および図2に示されたものと同様であるから、同一部分には同一符号を付して、その説明を省略する。   As shown in FIG. 4, in the third embodiment, a plurality of strip reinforcing bars 24 are arranged on the outer periphery of each pile head fixing rebar 15, and a fixing nut 23 is placed on the top of each pile head fixing rebar 15. Thus, the fixing ring 27 as a fixing member is attached to the pile head fixing structure in which the strength between the pile head fixing rebars 15 is improved and the fixing performance is improved. Since other structures are the same as those shown in FIGS. 1 and 2, the same parts are denoted by the same reference numerals, and the description thereof is omitted.

次に、各実施の形態の作用を説明する。   Next, the operation of each embodiment will be described.

中掘工法においては、フランジ金物14のない場合に用いる施工用回転キャップおよびチャックより一回り大きな施工用回転キャップおよびチャックにより、杭径より一回り大きいフランジ金物14をそのまま保持してSC杭11を中掘オーガとともに沈降させ、SC杭11を沈設後は、フランジ金物14に杭頭定着鉄筋15を取付ける。   In the medium digging method, the SC pile 11 is held by holding the flange hardware 14 that is slightly larger than the pile diameter as it is with the construction rotation cap and chuck that is slightly larger than the construction rotation cap and chuck used when there is no flange hardware 14. After settling with the digging auger and setting the SC pile 11, the pile head anchoring rebar 15 is attached to the flange hardware 14.

プレボーリング工法においては、杭頭のフランジ金物14に、その外径より突出する径方向の回転用鉄塊(通称よーかん)を溶接し、フランジ金物14のない場合に用いる回転治具より一回り大きな回転治具をこの回転用鉄塊に係合させてSC杭11を回転させるが、根切り後に、回転用鉄塊をガス切りして、杭頭定着鉄筋15を取付ける。   In the pre-boring method, a rotating iron block (commonly known as a steel rod) in the radial direction protruding from its outer diameter is welded to the flange hardware 14 at the head of the pile. The SC pile 11 is rotated by engaging a large rotating jig with the rotating iron ingot. After root cutting, the rotating iron ingot is degassed and the pile head fixing rebar 15 is attached.

杭頭定着鉄筋15の取付は、フランジ金物14の鉄筋締着穴16に杭頭定着鉄筋15のネジ部17を挿入し、杭頭定着鉄筋15のネジ部17に螺合された複数のナット21,22をフランジ金物14を介して締付けることで、フランジ金物14に杭頭定着鉄筋15を固定する。   Pile head anchoring rebar 15 is attached by inserting threaded portion 17 of pile head anchoring rebar 15 into reinforcing bar fastening hole 16 of flange hardware 14, and a plurality of nuts 21 screwed into threaded portion 17 of pile head anchoring reinforcing bar 15. , 22 is fastened through the flange hardware 14 to fix the pile head fixing rebar 15 to the flange hardware 14.

次に、各実施の形態の効果を説明する。   Next, the effect of each embodiment will be described.

杭本体12の少なくとも杭頭に一体化された外殻鋼管13より大径に形成されたフランジ金物14を外殻鋼管13の端部に溶接して、このフランジ金物14の外周縁に沿って複数の鉄筋締着穴16を設け、現場では、これらの鉄筋締着穴16に杭頭定着鉄筋15を取付けるようにしたので、天候や熟練度などに左右される手作業溶接を避けて信頼性の低下を防止でき、手作業でも杭頭定着鉄筋15を容易に施工でき、かつ高い信頼性が得られる杭を提供できる。   A flange hardware 14 formed with a diameter larger than that of the outer shell steel pipe 13 integrated with at least the pile head of the pile main body 12 is welded to the end of the outer shell steel pipe 13, and a plurality of pieces are provided along the outer peripheral edge of the flange hardware 14. Reinforcing bar reinforcement holes 16 are provided at the site, and pile head anchoring reinforcing bars 15 are attached to these reinforcing bar fastening holes 16, avoiding manual welding that depends on the weather, skill level, etc. It is possible to provide a pile that can be prevented from being lowered, can easily construct the pile head fixing rebar 15 by hand, and can obtain high reliability.

フランジ金物14の外周縁から径方向に鉄筋締着穴16が切込み形成されたので、鉄筋締着穴16より大径のナット21,22を杭頭定着鉄筋15に予めセットしたまま、この杭頭定着鉄筋15を径方向外側から鉄筋締着穴16に挿入でき、後からナット22を取付ける場合より杭頭定着鉄筋15の締着作業を容易にできる。   Reinforcing bar fastening holes 16 are formed in the radial direction from the outer peripheral edge of the flange hardware 14, so that the nuts 21 and 22 larger in diameter than the reinforcing bar fastening holes 16 are set in the pile head fixing reinforcing bar 15 in advance. The fixing rebar 15 can be inserted into the reinforcing bar fastening hole 16 from the outside in the radial direction, and the fastening work of the pile head fixing rebar 15 can be made easier than when the nut 22 is attached later.

異形鉄筋の少なくとも下部にネジ部を形成した杭頭定着鉄筋15のネジ部17をフランジ金物14の鉄筋締着穴16に挿入し、杭頭定着鉄筋15のネジ部に螺合された複数のナット21,22をフランジ金物14を介して締付けることでフランジ金物14に杭頭定着鉄筋15を固定したので、天候や熟練度などに左右される手作業溶接を避けて信頼性の低下を防止でき、手作業でも杭頭定着鉄筋15を容易に施工でき、かつ高い信頼性が得られる杭頭定着構造を提供できる。   A plurality of nuts that are inserted into the reinforcing bar fastening holes 16 of the flange hardware 14 and screwed into the threaded part of the pile head anchoring reinforcing bar 15 by inserting the threaded part 17 of the pile head anchoring reinforcing bar 15 having a threaded part at least below the deformed reinforcing bar Since the pile head anchoring rebar 15 is fixed to the flange hardware 14 by tightening the 21 and 22 via the flange hardware 14, it is possible to avoid a decrease in reliability by avoiding manual welding that depends on the weather and skill level, The pile head anchoring rebar 15 can be easily constructed even by manual work, and a pile head anchoring structure with high reliability can be provided.

杭頭定着鉄筋15の頂部にナット23、定着板26または定着リング27などの定着部材を取付けることで、杭頭定着鉄筋15の定着長を短くでき、さらに短く形成された杭頭定着鉄筋15は、運搬性に優れている。   By attaching a fixing member such as nut 23, fixing plate 26 or fixing ring 27 to the top of the pile head anchoring rebar 15, the anchor length of the pile head anchoring rebar 15 can be shortened. Excellent transportability.

杭頭定着鉄筋15をネジにより杭頭に定着するのではなく、ナット21,22の締付けによりフランジ金物14に固定するので、施工時、衝撃や傷などに強く、実用的である。   Since the pile head fixing rebar 15 is not fixed to the pile head with screws, but is fixed to the flange hardware 14 by tightening the nuts 21 and 22, it is strong against impacts and scratches during construction and is practical.

杭天のフランジ金物14を、杭径より直径で約10cm〜20cm大きくすることで、施工用回転キャップおよびチャックなどは1クラス上の杭径治具をそのまま使え、大幅に加工する施工治具を必要としない。   By making the flange hardware 14 of the pile top approximately 10cm to 20cm in diameter larger than the pile diameter, the construction rotation cap and chuck can use the pile diameter jig of one class as it is, and the construction jig to process greatly do not need.

フランジ金物14および杭頭定着鉄筋15は、既存の設備および治具で製作できる。   The flange hardware 14 and the pile head fixing rebar 15 can be manufactured with existing equipment and jigs.

フランジ金物14の溶接は、既存のフランジ溶接方法で全強溶接するため、鋼管本体強度と同強度の溶接強度が得られる。   Since the welding of the flange metal piece 14 is performed with full strength welding by an existing flange welding method, a welding strength equal to the strength of the steel pipe body can be obtained.

杭材のコストアップ要素としては、安価なフランジ金物14で済む。また、現状の後施工方式の全工程より安価に施工できる。   As an element for increasing the cost of pile material, an inexpensive flange hardware 14 is sufficient. In addition, it can be constructed at a lower cost than the current post-installation process.

天候に左右されずに、根切りが終了したところから手の空いた人により杭頭定着鉄筋15を取付けることができる。   The pile head anchoring rebar 15 can be attached by a person who has free hands after the completion of root cutting, regardless of the weather.

設計で必要な本数の杭頭定着鉄筋15のみを選択して取付けることができる。   Only the number of pile head anchoring rebars 15 necessary for the design can be selected and attached.

本発明は、外殻鋼管付きコンクリート杭すなわちSC杭11に限定されるものではなく、要するに、杭本体12の少なくとも杭頭に金属筒体が一体化された杭には適用可能である。   The present invention is not limited to the concrete pile with the outer shell steel pipe, that is, the SC pile 11. In short, the present invention can be applied to a pile in which the metal cylinder is integrated with at least the pile head of the pile body 12.

本発明に係る杭および杭頭定着構造の第1実施の形態を示す断面図である。It is sectional drawing which shows 1st Embodiment of the pile and pile head fixing structure which concern on this invention. 同上杭頭定着構造の平面図である。It is a top view of a pile head fixing structure same as the above. 本発明に係る杭および杭頭定着構造の第2実施の形態を示す断面図である。It is sectional drawing which shows 2nd Embodiment of the pile and pile head fixing structure which concern on this invention. 本発明に係る杭および杭頭定着構造の第3実施の形態を示す断面図である。It is sectional drawing which shows 3rd Embodiment of the pile and pile head fixing structure which concern on this invention.

符号の説明Explanation of symbols

11 杭としてのSC杭
12 杭本体
13 金属筒体としての外殻鋼管
14 フランジ金物
15 杭頭定着鉄筋
16 鉄筋締着穴
17 ネジ部
23 定着部材としての定着ナット
11 SC pile as pile
12 Pile body
13 Outer shell steel pipe as metal cylinder
14 Flange hardware
15 Pile head anchoring reinforcement
16 Rebar fastening holes
17 Screw
23 Fixing nut as fixing member

Claims (4)

コンクリートにより成形された杭本体と、
この杭本体の少なくとも杭頭に一体化された金属筒体と、
この金属筒体より大径に形成され金属筒体の端部に溶接されたフランジ金物と、
このフランジ金物の外周縁に沿って設けられ杭頭定着鉄筋を締着するための複数の鉄筋締着穴と
を具備したことを特徴とする杭。
A pile body made of concrete;
A metal cylinder integrated with at least the pile head of the pile body;
A flange hardware formed with a larger diameter than this metal cylinder and welded to the end of the metal cylinder,
A pile comprising a plurality of reinforcing bar fastening holes provided along the outer peripheral edge of the flange hardware for fastening the pile head fixing reinforcing bars.
鉄筋締着穴は、
フランジ金物の外周縁から径方向に切込み形成された
ことを特徴とする請求項1記載の杭。
Reinforcing bar fastening holes
The pile according to claim 1, wherein the pile is cut in a radial direction from an outer peripheral edge of the flange hardware.
請求項1または2記載の杭に取付けられる杭頭定着鉄筋は、少なくとも下部にネジ部を形成したものであり、
フランジ金物の鉄筋締着穴に杭頭定着鉄筋のネジ部を挿入し、
杭頭定着鉄筋のネジ部に螺合された複数のナットをフランジ金物を介して締付けることでフランジ金物に杭頭定着鉄筋を固定した
ことを特徴とする杭頭定着構造。
The pile head fixing rebar attached to the pile according to claim 1 or 2 is a screw part formed at least at the lower part,
Insert the threaded part of the pile head fixing rebar into the reinforcing bar fastening hole of the flange hardware,
A pile head anchoring structure characterized in that the pile head anchoring reinforcement is fixed to the flange hardware by tightening a plurality of nuts screwed to the threaded portion of the pile head anchoring reinforcing bar through the flange hardware.
杭頭定着鉄筋の頂部に取付けられた定着部材
を具備したことを特徴とする請求項3記載の杭頭定着構造。
The pile head fixing structure according to claim 3, further comprising a fixing member attached to the top of the pile head fixing rebar.
JP2006261694A 2006-09-27 2006-09-27 Construction method of pile head fixing structure in pile Active JP4778386B2 (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010053568A (en) * 2008-08-27 2010-03-11 Kubota Corp Construction structure and construction method for pile
WO2010071975A1 (en) * 2008-12-23 2010-07-01 Organoworld Inc. Wind turbine tower and method for building the same
WO2011043129A1 (en) 2009-10-06 2011-04-14 住友電気工業株式会社 Flame-retardant resin sheet and flat cable using same

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01215422A (en) * 1988-02-22 1989-08-29 Haseko Corp Manufacture of multi-directional x-type erection bar
JPH0718790A (en) * 1993-06-30 1995-01-20 Shigematsu Kogyo:Kk Distribution method for reinforcement
JP2002013137A (en) * 2000-06-28 2002-01-18 Katsuhiro Tanaka Pile head connection structure between pile with steel pipe and foundation slab
JP2005009300A (en) * 2003-05-27 2005-01-13 Sumitomo Metal Ind Ltd Structure of joining steel pipe to reinforcement and pile head joint portion
JP2006169787A (en) * 2004-12-15 2006-06-29 Fujita Corp Structure for joining pile and footing together

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01215422A (en) * 1988-02-22 1989-08-29 Haseko Corp Manufacture of multi-directional x-type erection bar
JPH0718790A (en) * 1993-06-30 1995-01-20 Shigematsu Kogyo:Kk Distribution method for reinforcement
JP2002013137A (en) * 2000-06-28 2002-01-18 Katsuhiro Tanaka Pile head connection structure between pile with steel pipe and foundation slab
JP2005009300A (en) * 2003-05-27 2005-01-13 Sumitomo Metal Ind Ltd Structure of joining steel pipe to reinforcement and pile head joint portion
JP2006169787A (en) * 2004-12-15 2006-06-29 Fujita Corp Structure for joining pile and footing together

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010053568A (en) * 2008-08-27 2010-03-11 Kubota Corp Construction structure and construction method for pile
WO2010071975A1 (en) * 2008-12-23 2010-07-01 Organoworld Inc. Wind turbine tower and method for building the same
WO2011043129A1 (en) 2009-10-06 2011-04-14 住友電気工業株式会社 Flame-retardant resin sheet and flat cable using same

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