JPH09302653A - Steel pipe reinforced pile method - Google Patents
Steel pipe reinforced pile methodInfo
- Publication number
- JPH09302653A JPH09302653A JP11891896A JP11891896A JPH09302653A JP H09302653 A JPH09302653 A JP H09302653A JP 11891896 A JP11891896 A JP 11891896A JP 11891896 A JP11891896 A JP 11891896A JP H09302653 A JPH09302653 A JP H09302653A
- Authority
- JP
- Japan
- Prior art keywords
- pile
- steel pipe
- ready
- ground
- piles
- 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
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 36
- 239000010959 steel Substances 0.000 title claims abstract description 36
- 238000000034 method Methods 0.000 title description 2
- 238000010276 construction Methods 0.000 claims abstract description 11
- 238000005452 bending Methods 0.000 description 2
- 238000007596 consolidation process Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 239000004570 mortar (masonry) Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Landscapes
- Piles And Underground Anchors (AREA)
- Foundations (AREA)
Abstract
(57)【要約】
【課題】 埋め立て等の弱い地盤において、既製杭を用
いて特に中間部を補強できるようにし、又鋼管杭を用い
る場合にはコストの低減を図った鋼管補強杭工法を提供
する。
【解決手段】 地盤中に打ち込んだ既製杭の中間部を外
側から鋼管で補強する。又は地盤中に鋼管杭を設置し、
その内側に既製杭を設けると共にこの既製杭の上部にフ
ーチングを施工する。
(57) [Abstract] [Problem] To provide a steel pipe reinforced pile construction method that makes it possible to particularly reinforce the middle part of a ground that is weak, such as landfill, by using ready-made piles, and reduces costs when steel pipe piles are used. To do. SOLUTION: The middle portion of a ready-made pile driven into the ground is reinforced with a steel pipe from the outside. Or install a steel pipe pile in the ground,
A prefabricated pile will be provided inside and a footing will be installed on top of the prefabricated pile.
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、既製杭と鋼管とを
組み合わせた鋼管補強杭工法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a steel pipe reinforced pile construction method in which ready-made piles and steel pipes are combined.
【０００２】[0002]
【従来の技術】埋め立て等の弱い地盤を敷地とする建家
の計画がある場合には、基礎の構造に充分な強度が得ら
れるように設計する必要がある。具体的には、側方流
動、圧密沈下、液状化及び地震時の応答変位等に対して
安全性を確保することである。この安全対策としては、
従来ＰＨＣ杭やＳＣ杭等の既製杭を地盤中に深く打ち込
み、しかも数多く打ち込んでその上部にフーチングを設
けるようにしている。又、既製杭では対応できない場合
には、例えば図３に示すように６００φ×１６ｍｍ、長
さ１５ｍ程度の複数本（図例では３本）の鋼管杭Ａ、
Ｂ、Ｃを継ぎ足して地盤Ｄ中に設置する方法が採られて
いる。2. Description of the Related Art When there is a plan for a building whose land is weak ground such as landfill, it is necessary to design the foundation structure so that it has sufficient strength. Specifically, it is to secure safety against lateral flow, consolidation settlement, liquefaction, and response displacement during earthquakes. As a safety measure,
Conventionally, ready-made piles such as PHC piles and SC piles are driven deep into the ground, and a large number of them are driven in to provide footing above them. In addition, when it is not possible to deal with the existing piles, for example, as shown in FIG.
The method of adding B and C and installing in the ground D is adopted.
【０００３】[0003]
【発明が解決しようとする課題】前記従来の既製杭によ
ると、特に側方流動による長期曲げモーメント等の大き
な応力が掛かる杭の中間部の強度が問題となり、又鋼管
杭の場合には中間部に強度の強いもの（例えば６００φ
×２５ｍｍ）を使用せねばならず、コスト高になる問題
点がある。According to the conventional off-the-shelf piles, the strength of the middle portion of the pile, which is subject to a large stress such as a long-term bending moment due to lateral flow, becomes a problem, and in the case of a steel pipe pile, the middle portion is a problem. Very strong (eg 600φ
X 25 mm) must be used, which causes a problem of high cost.
【０００４】本発明は、前記のような従来の問題点を解
決するためになされ、埋め立て等の弱い地盤において、
既製杭を用いて特に中間部を補強できるようにし、又鋼
管杭を用いる場合にはコストの低減を図った鋼管補強杭
工法を提供することを目的とする。The present invention has been made to solve the above-mentioned conventional problems, and in weak ground such as landfill,
It is an object of the present invention to provide a steel pipe reinforced pile construction method in which it is possible to particularly reinforce the middle portion by using ready-made piles, and when steel pipe piles are used, the cost is reduced.
【０００５】[0005]
【課題を解決するための手段】前記課題を技術的に解決
するための手段として、本発明は、地盤中に打ち込んだ
既製杭の一部を外側から鋼管で補強することを要旨とす
る。又、地盤中に鋼管杭を設置し、その内側に既製杭を
設けると共にこの既製杭の上部にフーチングを施工する
ことを要旨とする。As a means for technically solving the above-mentioned problems, the present invention has a gist of reinforcing a part of a ready-made pile driven into the ground with a steel pipe from the outside. Further, the gist is to install a steel pipe pile in the ground, provide a ready-made pile inside the pile, and install footing on the upper part of the ready-made pile.
【０００６】[0006]
【発明の実施の形態】以下、本発明の実施の形態を添付
図面に基づいて詳説する。図１は第１の発明の実施形態
を示すもので、(イ) において１は地盤Ｄ中に打ち込まれ
た第１の杭であり、既製コンクリート杭（例えばＰＨＣ
杭のＡ種）で直径は６００ｍｍ、長さ１５ｍに形成され
ている。Embodiments of the present invention will be described below in detail with reference to the accompanying drawings. FIG. 1 shows an embodiment of the first invention. In (a), 1 is a first pile driven into the ground D, and is a ready-made concrete pile (for example, PHC).
The type A pile) has a diameter of 600 mm and a length of 15 m.
【０００７】２は第１の杭１の上に設けた第２の杭であ
り、図１(ロ) に示すように直径６００ｍｍ、長さ１５ｍ
に形成された既製コンクリート杭２ａ（ＰＨＣ杭のＣ
種）の外側に、例えば厚さ１９ｍｍの鋼管２ｂを巻き付
けて補強したものである。この第２の杭２には、埋め立
て等による地盤Ｄ中で側方流動による長期曲げモーメン
トが大きく掛かるからである。Reference numeral 2 is a second pile provided on the first pile 1 and has a diameter of 600 mm and a length of 15 m as shown in FIG.
Ready-made concrete pile 2a (PHC pile C
A steel pipe 2b having a thickness of 19 mm, for example, is wound around the outside of the seed) for reinforcement. This is because the second pile 2 is subjected to a large long-term bending moment due to lateral flow in the ground D due to landfill or the like.
【０００８】３は第２の杭２の上に設けた第３の杭であ
り、既製コンクリート杭（例えばＳＣ杭）で直径は６０
０ｍｍ、厚さ１２ｍｍ、長さ１５ｍに形成され、この上
部にフーチング４が施工される。Reference numeral 3 denotes a third pile provided on the second pile 2, which is a ready-made concrete pile (for example, SC pile) and has a diameter of 60.
It is formed to have a thickness of 0 mm, a thickness of 12 mm, and a length of 15 m, and the footing 4 is installed on the upper portion.
【０００９】即ち、この場合は３本の既製コンクリート
杭を連結させた継ぎ杭であり、中間部の第２の杭２のみ
外側に鋼管２ｂを巻いて補強した構成にしてある。これ
により、既製杭の中間部が特に強いため基礎構造が堅固
となり、軟弱な地盤の上に構築する建家の安全を充分確
保することができる。しかも、この場合は全長に亙って
鋼管杭を使用する場合よりもコストの低減が図れる。That is, in this case, it is a joint pile in which three ready-made concrete piles are connected, and only the second pile 2 in the middle portion is reinforced by winding the steel pipe 2b on the outside. As a result, since the middle part of the ready-made pile is particularly strong, the foundation structure becomes solid, and it is possible to sufficiently secure the safety of the building constructed on the soft ground. Moreover, in this case, the cost can be reduced as compared with the case where the steel pipe pile is used over the entire length.
【００１０】図２は第２の発明の実施形態を示すもの
で、先ず(イ) のように外側となる鋼管杭１１の施工を行
う。この施工の際に、図示は省略したが地盤Ｄを掘削す
るためにオーガーが併用される。FIG. 2 shows an embodiment of the second invention. First, as shown in (a), the outer steel pipe pile 11 is constructed. At the time of this construction, although not shown, an auger is also used to excavate the ground D.
【００１１】次に、図２(ロ) のように前記鋼管杭１１の
内側に既製コンクリート杭１２を設置する施工を行う。
この際、既製コンクリート杭１２の下端部は支持層Ｅに
支持させる。外側の鋼管杭１１は地盤Ｄの側方流動、圧
密沈下、地震時の地盤応答変位による応力を処理し、内
側の既製コンクリート杭１２は上部建家の軸力、地震時
の慣性力を処理するのである。Next, as shown in FIG. 2 (b), the pre-made concrete pile 12 is installed inside the steel pipe pile 11.
At this time, the lower end of the ready-made concrete pile 12 is supported by the support layer E. The steel pipe pile 11 on the outside handles lateral flow of the ground D, consolidation settlement, and stress due to ground response displacement at the time of earthquake, and the ready-made concrete pile 12 on the inside handles axial force of the upper building and inertial force at the time of earthquake. Of.
【００１２】この後、図２(ハ) のように既製コンクリー
ト杭１２の上部にフーチング１３の施工を行う。前記鋼
管杭１１と既製コンクリート杭１２との間の隙間の大き
さによってはモルタル１４を充填することがある。After this, as shown in FIG. 2C, a footing 13 is installed on the upper part of the ready-made concrete pile 12. Depending on the size of the gap between the steel pipe pile 11 and the ready-made concrete pile 12, mortar 14 may be filled.
【００１３】即ち、この場合は鋼管と既製杭との二重鋼
管杭の構成であり、通常の設計での上部建家慣性力によ
る力の処理を内側の既製コンクリート杭１２で、地盤Ｄ
の慣性力による力の処理を外側の鋼管杭１１で分担する
ことにより地盤条件の変化に合理的に対応することがで
きる。従って、全長が鋼管杭の場合、その中間部に強度
の強い鋼管を使用する必要がなくなり、コスト高を未然
に防止することが可能となる。That is, in this case, the structure is a double steel pipe pile consisting of a steel pipe and a prefabricated pile, and the processing of the force by the inertia force of the upper building in the usual design is performed by the prefabricated concrete pile 12 on the inside and the ground D.
It is possible to rationally deal with the change in the ground condition by sharing the processing of the force by the inertia force of the outer steel pipe pile 11. Therefore, when the entire length is a steel pipe pile, it is not necessary to use a steel pipe having high strength in the middle portion, and it is possible to prevent cost increase in advance.
【００１４】[0014]
【発明の効果】以上説明したように、第１の発明によれ
ば、埋め立て等の弱い地盤において既製杭を用いて特に
中間部を鋼管で補強したので建家の安全を充分確保する
ことができ、第２の発明によれば、外側に鋼管杭を用い
その内側に既製杭を設けて応力を分担させたので、鋼管
杭の中間部に特に強い鋼管を用いる必要がなくなりコス
トの低減が図れる等の優れた効果を奏する。As described above, according to the first aspect of the present invention, since the prefabricated pile is used to reinforce the middle part of the ground, especially the weak ground such as landfill, the steel pipe is reinforced, the safety of the building can be sufficiently ensured. According to the second invention, since the steel pipe pile is used on the outer side and the ready-made pile is provided on the inner side to share the stress, it is not necessary to use a particularly strong steel pipe in the middle portion of the steel pipe pile, and the cost can be reduced. Exerts the excellent effect of.
【図面の簡単な説明】[Brief description of drawings]
【図１】 (イ) は第１の発明の実施形態を示す説明図、
(ロ) はその中間部の断面図である。FIG. 1A is an explanatory view showing an embodiment of the first invention,
(B) is a cross-sectional view of an intermediate portion thereof.
【図２】 第２の発明の実施形態を示すもので、(イ) は
外側鋼管杭の施工、(ロ) は内側既製コンクリート杭の施
工、(ハ) はフーチングの施工をそれぞれ示す説明図であ
る。FIG. 2 is a view showing an embodiment of the second invention, and (a) is an explanatory view showing an outer steel pipe pile construction, (b) is an inner ready-made concrete pile construction construction, and (c) is a footing construction construction diagram. is there.
【図３】 従来の鋼管継ぎ杭を示す説明図である。FIG. 3 is an explanatory view showing a conventional steel pipe joint pile.
１…第１の杭 ２…第２の杭 ２ａ…既製コンクリート杭 ２ｂ…鋼管 ３…第３の杭 ４…フーチング １１…鋼管杭 １２…既製コンクリート杭 １３…フーチング １４…モルタル 1 ... 1st pile 2 ... 2nd pile 2a ... Ready-made concrete pile 2b ... Steel pipe 3 ... 3rd pile 4 ... Footing 11 ... Steel pipe pile 12 ... Ready-made concrete pile 13 ... Footing 14 ... Mortar
Claims (2)
側から鋼管で補強することを特徴とする鋼管補強杭工
法。1. A steel pipe reinforced pile construction method characterized in that an intermediate portion of a ready-made pile driven into the ground is reinforced with a steel pipe from the outside.
製杭を設けると共にこの既製杭の上部にフーチングを施
工することを特徴とする鋼管補強杭工法。2. A steel pipe reinforced pile construction method, characterized in that a steel pipe pile is installed in the ground, a ready-made pile is provided inside the pile, and footing is applied to the upper portion of the ready-made pile.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11891896A JPH09302653A (en) | 1996-05-14 | 1996-05-14 | Steel pipe reinforced pile method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11891896A JPH09302653A (en) | 1996-05-14 | 1996-05-14 | Steel pipe reinforced pile method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH09302653A true JPH09302653A (en) | 1997-11-25 |
Family
ID=14748411
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11891896A Pending JPH09302653A (en) | 1996-05-14 | 1996-05-14 | Steel pipe reinforced pile method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH09302653A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105625461A (en) * | 2016-03-16 | 2016-06-01 | 国网浙江省电力公司绍兴供电公司 | Weight type steel pipe pile foundation of transmission line self-supporting rod |
| CN107542085A (en) * | 2017-09-12 | 2018-01-05 | 南京友西科技股份有限公司 | A kind of reinforcement means of pipe of concrete pile joint |
| CN110130275A (en) * | 2019-05-17 | 2019-08-16 | 中铁六局集团有限公司 | A kind of anticollision device, collision-prevention device construction method by crowded waters navigation channel |
-
1996
- 1996-05-14 JP JP11891896A patent/JPH09302653A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105625461A (en) * | 2016-03-16 | 2016-06-01 | 国网浙江省电力公司绍兴供电公司 | Weight type steel pipe pile foundation of transmission line self-supporting rod |
| CN107542085A (en) * | 2017-09-12 | 2018-01-05 | 南京友西科技股份有限公司 | A kind of reinforcement means of pipe of concrete pile joint |
| CN110130275A (en) * | 2019-05-17 | 2019-08-16 | 中铁六局集团有限公司 | A kind of anticollision device, collision-prevention device construction method by crowded waters navigation channel |
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