JPH09291528A - Steel pipe pile - Google Patents
Steel pipe pileInfo
- Publication number
- JPH09291528A JPH09291528A JP13110696A JP13110696A JPH09291528A JP H09291528 A JPH09291528 A JP H09291528A JP 13110696 A JP13110696 A JP 13110696A JP 13110696 A JP13110696 A JP 13110696A JP H09291528 A JPH09291528 A JP H09291528A
- Authority
- JP
- Japan
- Prior art keywords
- steel pipe
- pipe pile
- bottom cover
- ground
- tip
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Piles And Underground Anchors (AREA)
Abstract
Description
【0001】[0001]
【発明の属する技術分野】この発明は、土木建築物の基
礎となる地盤部分の補強を行うために使用する鋼管杭に
関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a steel pipe pile used to reinforce a ground portion which is a foundation of a civil engineering building.
【0002】[0002]
【従来の技術】土木建築工事において、建築物の基礎と
なる地盤部分の支持力については古くから重要性が認識
されており、地盤に対して高い支持力を得るために鋼管
杭等を使用した地盤の補強工法が各種開発されている。2. Description of the Related Art In civil engineering and construction work, it has long been recognized that the bearing capacity of a ground portion, which is the foundation of a building, is important, and steel pipe piles and the like have been used in order to obtain a high bearing capacity for the ground. Various methods of reinforcing the ground have been developed.
【0003】このような地盤の補強方法に使用する鋼管
杭等としては、例えば図3に示すような切放しのストレ
ート形状を有し、地中への打設が容易であってしかも価
格が安い鋼管杭100や、図4に示すような先端部分に
羽根101Aを設け、上からの圧入力が小さくても木ね
じ効果で貫入がスムースなスクリュウ鋼管杭等が知られ
ている。[0003] As a steel pipe pile or the like used in such a method of reinforcing the ground, for example, a steel pipe having an open straight shape as shown in FIG. 3 and which can be easily driven into the ground and is inexpensive. There is known a pile 100 or a screw steel pipe pile in which a blade 101A is provided at the tip portion as shown in FIG.
【0004】[0004]
【発明が解決しようとする課題】しかしながら、前者の
鋼管杭を使用すると、打設後の長期支持力に劣ること、
砂質地盤では初期沈下が起こりやすいこと、硬質地盤へ
の打設に不向きであること等の問題がある。However, when the former steel pipe pile is used, the long-term bearing capacity after casting is inferior.
In sandy ground, there are problems such as initial settlement likely to occur and unsuitability for placing on hard ground.
【0005】また、スクリュウ鋼管杭101を使用すれ
ば、杭の製作コストが高くつくこと、運搬や保管が面倒
であること、貫入時に鋼管先端周辺の地層を荒らすか
ら、直立性を保持しにくいこと、杭の周辺が沈下し易い
こと等の問題がある。[0005] Further, if the screw steel pipe pile 101 is used, the production cost of the pile is high, the transportation and storage are troublesome, and the stratum near the tip of the steel pipe is roughened when the pile is penetrated, so that it is difficult to maintain the uprightness. There is a problem that the periphery of the pile is likely to sink.
【0006】そこで、この発明は、上記した事情に鑑
み、初期沈下が起こり難く土中支持力に安定性があると
ともに、硬質地盤への貫入が容易であり、しかも運搬・
保管・現場加工が容易であり、さらに鋼管先端周辺の地
層を荒らさず直立性を保持し易いばかりか圧密効果や精
度が得やすい鋼管杭を提供することを目的とするもので
ある。[0006] In view of the above circumstances, the present invention has the advantage that the initial settlement is unlikely to occur, the bearing capacity in the soil is stable, the penetration into the hard ground is easy, and the transportation and
It is an object of the present invention to provide a steel pipe pile that is easy to store and work on site, and that can maintain the uprightness without roughening the formation around the tip of the steel pipe and can easily obtain the consolidation effect and accuracy.
【0007】[0007]
【課題を解決するための手段】即ち請求項1の発明は、
中空筒状を有する鋼管杭であって、この鋼管杭の先端側
内部の一定深さに底蓋を設けて閉塞させるとともに、前
記底蓋に前記鋼管杭の先端から適宜の長さだけ突出した
刃を設けたものである。Means for Solving the Problems That is, the invention of claim 1 is:
A steel pipe pile having a hollow tubular shape, which is provided with a bottom lid at a certain depth inside the tip side of the steel pipe pile to close it, and a blade protruding from the tip of the steel pipe pile to the bottom lid by an appropriate length. Is provided.
【0008】[0008]
【発明の実施の形態】以下この発明の一実施例について
添付図面を参照しながら説明する。An embodiment of the present invention will be described below with reference to the accompanying drawings.
【0009】図1は、この発明に係る鋼管杭を示す要部
斜視図である。この鋼管杭は、適宜の材料、例えば構造
用炭素鋼等の材料で内径Dの大きさに形成された一定強
度を有する中空円筒状(ストレート状)を有する本体1
と、この本体1の開口した先端(下端)から適宜の深さ
(この実施例では深さD/2)のところで本体1の内周
面に溶着された直径がほぼDの寸法を有する円盤状の底
蓋2と、所定の高さ(例えばこの実施例では本体1の内
径寸法Dとほぼ同一の高さ)を有し、適宜の材料、例え
ばこの実施例では高張力鋼等の材料で形成され、この底
蓋2の下面に垂直に起立した状態で溶着された刃3とを
備えている。FIG. 1 is a perspective view of an essential part showing a steel pipe pile according to the present invention. This steel pipe pile is a body 1 having a hollow cylindrical shape (straight shape) having a constant strength, which is formed of an appropriate material, for example, a structural carbon steel or the like and has an inner diameter D.
And a disc-like shape having a diameter of approximately D welded to the inner peripheral surface of the main body 1 at an appropriate depth (depth D / 2 in this embodiment) from the open tip (lower end) of the main body 1. Of the bottom cover 2 and a predetermined height (for example, almost the same height as the inner diameter D of the main body 1 in this embodiment), and is formed of an appropriate material, for example, a material such as high tensile steel in this embodiment. The bottom cover 2 is provided with a blade 3 that is vertically welded to the lower surface of the bottom cover 2.
【0010】なおこの実施例では、底蓋2が鋼管杭の本
体1の内径Dの半分の深さ(D/2)に設けてあり、ま
た刃3の高さは内径寸法Dと同一になっているが、勿論
これらに限定されるものではない。In this embodiment, the bottom cover 2 is provided at a depth (D / 2) which is half the inner diameter D of the body 1 of the steel pipe pile, and the height of the blade 3 is the same as the inner diameter dimension D. However, of course, it is not limited to these.
【0011】従ってこの実施例によれば、底蓋2のある
鋼管杭によって地中に圧入していくから、底蓋2から本
体1内部には土が侵入することがなく、効率的な圧入作
用を実現することができる。しかもまた、この実施例の
鋼管杭によれば、図2において、ドットAで示す領域は
圧密効果によって鋼管杭の圧入時に土壌が硬く圧縮され
た状態となっており、その上所謂モンロー効果によって
その圧密な土壌の領域が刃3の下方に広がって膨らんで
おり、支持力が一層増大している。Therefore, according to this embodiment, since the steel pipe pile having the bottom cover 2 press-fits it into the ground, the soil does not enter the inside of the main body 1 from the bottom cover 2 and the efficient press-fitting action is achieved. Can be realized. Moreover, according to the steel pipe pile of this embodiment, the region indicated by the dot A in FIG. 2 is in a state where the soil is hard and compressed when the steel pipe pile is pressed in due to the consolidation effect, and due to the so-called Monroe effect, A region of compact soil spreads and swells below the blade 3, and the supporting force is further increased.
【0012】[0012]
【発明の効果】以上説明してきたようにこの発明によれ
ば、先端側(下端)内部に刃を突設した底蓋を有してお
り、換言すれば先端部分に底蓋を設けて先端部分を閉塞
構造としており、土中へ圧入しても従来のような中空の
鋼管杭とは異なり杭の内部まで土壌が侵入する虞れがな
いから、圧入作用の無駄が少ない効率的な圧入作業が実
現できるとともに、初期沈下をもたらす虞れもなく土中
支持力に安定性があるから、安定した支持力を長期間に
亘り発揮することが可能である。As described above, according to the present invention, the bottom lid having the blade projecting inside the tip side (lower end) is provided. In other words, the bottom lid is provided at the tip portion and the tip portion is provided. Since it has a closed structure, there is no possibility that the soil will enter the inside of the pile even if it is press-fitted into the soil unlike conventional hollow steel pipe piles, so efficient press-fitting work with less waste of press-fitting action is possible. In addition to being realized, there is no risk of causing initial settlement, and since the bearing capacity in the soil is stable, it is possible to exert a stable bearing capacity for a long period of time.
【0013】しかもこの発明によれば、回転しながら圧
入させることにより、譬え圧入力が小さくても先端部分
から突設した刃による掘削効果によって貫入が極めてス
ムースに行えるから、硬質地盤へも確実に貫入させるこ
とができる効果がある。Furthermore, according to the present invention, by press-fitting while rotating, even if the pressure input is small, the penetration can be performed extremely smoothly by the excavating effect of the blade protruding from the tip portion, so that it can be surely applied to the hard ground. It has the effect of being able to penetrate.
【0014】また、この発明によれば、周面部分に特に
突出部がないから、つまり先端面から一部刃が突設して
いるだけであるから、運搬・保管・現場加工が容易であ
り、さらに鋼管先端周辺の地層を荒らさず直立性を保持
し易いばかりか圧密効果や精度が得やすいといった効果
も得られる。Further, according to the present invention, since there is no particular protruding portion on the peripheral surface portion, that is, since only a part of the blade projects from the tip surface, transportation, storage and on-site processing are easy. In addition, it is easy to maintain uprightness without roughening the stratum around the tip of the steel pipe, and it is possible to obtain the effect of consolidation and accuracy.
【図1】この発明に使用する鋼管杭を示す要部斜視図。FIG. 1 is a perspective view of essential parts showing a steel pipe pile used in the present invention.
【図2】この発明に係る鋼管杭の地中への貫入時の状態
を示す説明図。FIG. 2 is an explanatory view showing a state when the steel pipe pile according to the present invention penetrates into the ground.
【図3】従来の鋼管杭を示す概略断面図。FIG. 3 is a schematic sectional view showing a conventional steel pipe pile.
【図4】他の鋼管杭を示す断面図。FIG. 4 is a sectional view showing another steel pipe pile.
1 本体 2 底蓋 3 刃 1 Main body 2 Bottom lid 3 Blade
Claims (1)
させるとともに、 前記底蓋に前記鋼管杭の先端から適宜の長さだけ突出し
た刃を設けたことを特徴とする鋼管杭。1. A steel pipe pile having a hollow tubular shape, wherein a bottom lid is provided at a predetermined depth inside the tip end of the steel pipe pile to close the steel pipe pile, and the bottom lid has an appropriate length from the tip of the steel pipe pile. A steel pipe pile characterized by having a blade that protrudes only a little.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13110696A JPH09291528A (en) | 1996-04-25 | 1996-04-25 | Steel pipe pile |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13110696A JPH09291528A (en) | 1996-04-25 | 1996-04-25 | Steel pipe pile |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH09291528A true JPH09291528A (en) | 1997-11-11 |
Family
ID=15050126
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP13110696A Pending JPH09291528A (en) | 1996-04-25 | 1996-04-25 | Steel pipe pile |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH09291528A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2011052409A (en) * | 2009-08-31 | 2011-03-17 | Sumitomo Forestry Co Ltd | Mounting structure for tip cutting blade of steel pipe pile |
JP2012158978A (en) * | 2008-03-14 | 2012-08-23 | Sekisui Chem Co Ltd | Steel pipe pile |
-
1996
- 1996-04-25 JP JP13110696A patent/JPH09291528A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2012158978A (en) * | 2008-03-14 | 2012-08-23 | Sekisui Chem Co Ltd | Steel pipe pile |
JP2011052409A (en) * | 2009-08-31 | 2011-03-17 | Sumitomo Forestry Co Ltd | Mounting structure for tip cutting blade of steel pipe pile |
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