JP2009243111A - Pile - Google Patents

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Publication number
JP2009243111A
JP2009243111A JP2008089771A JP2008089771A JP2009243111A JP 2009243111 A JP2009243111 A JP 2009243111A JP 2008089771 A JP2008089771 A JP 2008089771A JP 2008089771 A JP2008089771 A JP 2008089771A JP 2009243111 A JP2009243111 A JP 2009243111A
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Japan
Prior art keywords
pile
peripheral rib
spiral
core material
outer periphery
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JP2008089771A
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Japanese (ja)
Inventor
Shigeyoshi Hirata
茂良 平田
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Daiwa House Industry Co Ltd
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Daiwa House Industry Co Ltd
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Priority to JP2008089771A priority Critical patent/JP2009243111A/en
Publication of JP2009243111A publication Critical patent/JP2009243111A/en
Pending legal-status Critical Current

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Abstract

<P>PROBLEM TO BE SOLVED: To provide a lightweight, inexpensive and anticorrosive pile which has advantages of both a wooden pile and a plastic pile, and which can penetrate the ground by rotation. <P>SOLUTION: This pile is composed of a wooden core material 1 and a plastic coating 2. A spiral groove 3 is formed on the outer periphery of the core material 1. The plastic coating 2 covers at least the outer periphery and lower end of the core material 1, and has a spiral inner peripheral rib 4 which is fitted into the groove 3. In addition, a spiral outer peripheral rib 5 directed in a direction opposite to the inner peripheral rib 4 is provided on the outer periphery of the plastic coating 2. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

この発明は、例えば住宅のコンクリート基礎の補強用として用いられる杭に関する。   The present invention relates to a pile used for reinforcing a concrete foundation of a house, for example.

従来、住宅の基礎杭としては、木製のものが多く使用されてきた。一部では、金属製の杭も使用されている(例えば特許文献1)。また、農業や造園の分野では、例えば柵等の用途で図6に示すようなプラスチック製の杭が使用されている。
特開平8−218370号公報
Conventionally, wooden foundation piles have been often used. In some cases, metal piles are also used (for example, Patent Document 1). In the fields of agriculture and landscaping, plastic piles as shown in FIG. 6 are used for applications such as fences.
JP-A-8-218370

木製杭は、軽量でコストが安いという長所がある反面、地中で腐食しやすいという短所がある。金属製杭は非常に高価である。また、重くて人力で扱えず、作業性が悪い。そこで、腐食しにくく、金属製杭に比べて安価なプラスチック製杭を住宅の基礎杭として使用することを考えた。しかし、プラスチック製杭は、木製杭に比べて重くて取扱いにくく、コスト面でも、金属製杭よりは安いが、木製杭よりもかなり高い。   Wooden piles have the advantage of being lightweight and cheap, but they are susceptible to corrosion in the ground. Metal piles are very expensive. In addition, it is heavy and cannot be handled manually, and the workability is poor. Therefore, we considered using plastic piles that are less likely to corrode and cheaper than metal piles as foundation piles for housing. However, plastic piles are heavier and harder to handle than wooden piles, and cost is also cheaper than metal piles, but considerably higher than wooden piles.

また、近年では騒音や振動への対策から、杭を回転させながら地中に貫入させる方法が主流となりつつあることから、これに対応できるようにする必要がある。   In recent years, as a countermeasure against noise and vibration, a method of penetrating into the ground while rotating a pile is becoming mainstream, and it is necessary to be able to cope with this.

この発明の目的は、木製杭およびプラスチック製杭の長所を併せ持ち、軽量、低コストで、腐食せず、しかも回転による地中への貫入が可能な杭を提供することである。   An object of the present invention is to provide a pile that has the advantages of a wooden pile and a plastic pile, is lightweight, low-cost, does not corrode, and can penetrate into the ground by rotation.

この発明の杭は、外周に螺旋状の溝が形成された木製の芯材と、この芯材の少なくとも外周および下端部を被覆し、かつ前記溝に嵌り込んだ螺旋状の内周リブを有するプラスチック被膜とでなることを特徴とする。
木製の芯材の外周をプラスチック被膜で被覆した構成とすることにより、木製杭の軽量でコストが安いという長所と、プラスチック製杭の腐食しないという長所とが併せて得られる。また、杭を内周リブの螺旋の向きと逆向きに回転させながら地中に貫入することにより、貫入時に杭に生じるねじりに対して内周リブが抵抗するように作用をする。このため、ねじりに対する十分な強度を有し、回転による地中への貫入が可能である。なお、上記「螺旋の向き」とは、螺旋の中心が下に向かうときの巻きの方向のことである。
The pile according to the present invention has a wooden core member having a spiral groove formed on the outer periphery, and a spiral inner peripheral rib that covers at least the outer periphery and the lower end of the core member and is fitted in the groove. It consists of a plastic film.
By adopting a structure in which the outer periphery of the wooden core is covered with a plastic coating, the advantages of the light weight and low cost of the wooden pile and the advantage of not corroding the plastic pile are obtained. Further, by penetrating the pile into the ground while rotating the pile in the direction opposite to the spiral direction of the inner circumferential rib, the inner circumferential rib acts to resist torsion occurring in the pile at the time of penetration. For this reason, it has sufficient strength against torsion and can penetrate into the ground by rotation. The “spiral direction” refers to a winding direction when the center of the spiral is directed downward.

この発明において、前記プラスチック被膜の外周に、前記内周リブと逆向きの螺旋状をした外周リブを設けるとよい。
外周リブが設けられていると、杭を回転させながら地中に貫入する際に、杭の進路にある土砂が外周リブによって上方へ排出されるため、打設が円滑に行える。また、埋設されている杭を引き抜く際には、杭に生じるねじりに対して外周リブが抵抗するように作用するため、杭を折らずに抜くことができる。
In the present invention, an outer peripheral rib having a spiral shape opposite to the inner peripheral rib may be provided on the outer periphery of the plastic coating.
When the outer peripheral rib is provided, when the pile penetrates into the ground while rotating the pile, the earth and sand in the course of the pile is discharged upward by the outer peripheral rib, so that the placement can be performed smoothly. Further, when pulling out an embedded pile, the outer peripheral rib acts to resist torsion occurring in the pile, so that the pile can be pulled out without breaking.

この発明の杭は、外周に螺旋状の溝が形成された木製の芯材と、この芯材の少なくとも外周および下端部を被覆し、かつ前記溝に嵌り込んだ螺旋状の内周リブを有するプラスチック被膜とでなるため、木製杭およびプラスチック製杭の長所を併せ持ち、軽量、低コストで、腐食せず、しかも回転貫入による打設が可能である。   The pile according to the present invention has a wooden core member having a spiral groove formed on the outer periphery, and a spiral inner peripheral rib that covers at least the outer periphery and the lower end of the core member and is fitted in the groove. Because it is made of plastic coating, it has the advantages of wooden piles and plastic piles, is lightweight, low-cost, does not corrode, and can be driven by rotational penetration.

この発明の実施形態を図1ないし図5と共に説明する。図1はこの発明の実施形態にかかる杭の正面図、および平面図、図2は断面図である。この杭は、木製の芯材1と、この芯材1の外周を被覆するプラスチック被膜2とでなる。芯材1は、先細りの円柱状で、下端部1aがさらに急角度の先細りになった円錐状に形成されている。芯材1の外周には螺旋状の溝3が形成されており、この溝3にプラスチック被膜2に設けた内周リブ4が嵌り込んでいる。また、プラスチック被膜2の外周には、内周リブ4と逆向きの螺旋状をした外周リブ5が設けられている。プラスチック被膜2を構成する樹脂の種類は、成形可能なものであれば何でもよいが、耐腐食性が高く、芯材1よりも強度の強いものが望ましい。杭の長さは、例えば1〜2m、あるいは長くて4〜6mである。   An embodiment of the present invention will be described with reference to FIGS. 1 is a front view and a plan view of a pile according to an embodiment of the present invention, and FIG. 2 is a cross-sectional view. This pile consists of a wooden core material 1 and a plastic coating 2 covering the outer periphery of the core material 1. The core material 1 is a tapered columnar shape, and the lower end 1a is formed in a conical shape with a further sharp taper. A spiral groove 3 is formed on the outer periphery of the core material 1, and an inner peripheral rib 4 provided on the plastic film 2 is fitted in the groove 3. In addition, an outer peripheral rib 5 having a spiral shape opposite to the inner peripheral rib 4 is provided on the outer periphery of the plastic coating 2. Any kind of resin can be used for the plastic coating 2 as long as it can be molded. However, it is desirable to use a resin that has high corrosion resistance and is stronger than the core material 1. The length of the pile is, for example, 1 to 2 m, or 4 to 6 m at long.

この杭の製作方法としては、例えば、図3に示す芯材の原型6を作り、この原型6の外周に螺旋状の溝3を加工して図4に示す芯材1とし、この芯材1の表面に型入れ成形(いわばインサート成形)等によりプラスチック被膜2を加工する方法を採用することができる。また、他の製作方法としては、芯材1とプラスチック被膜2とを別に製作しておき、後でプラスチック被膜2の中に芯材1をねじ込む方法がある。この場合、プラスチック被膜2の上端部分2a(図2)は、芯材1をねじ込んだ後で取付け、熱溶着や接着により密封することになる。   As a manufacturing method of this pile, for example, the core material prototype 6 shown in FIG. 3 is made, and the spiral groove 3 is processed on the outer periphery of the prototype 6 to obtain the core material 1 shown in FIG. A method of processing the plastic coating 2 on the surface of the material by mold insertion molding (so-called insert molding) or the like can be employed. As another manufacturing method, there is a method in which the core material 1 and the plastic film 2 are separately manufactured and the core material 1 is screwed into the plastic film 2 later. In this case, the upper end portion 2a (FIG. 2) of the plastic coating 2 is attached after the core material 1 is screwed in and sealed by heat welding or adhesion.

この杭を打設する際には、図5(A)に示すように、外周リブ5の螺旋の向きに回転させながら地中に貫入する。ここで言う「螺旋の向き」とは、螺旋の中心が下に向かうときの巻きの方向のことである。このとき、杭の進路にある土砂が外周リブ5によって上方へ排出されるため、打設が円滑に行える。この打設時には、杭に生じるねじりに対して内周リブ4が抵抗するように作用をするため、ねじりに対する十分な強度を有する。   When driving this pile, as shown in FIG. 5 (A), it penetrates into the ground while rotating in the direction of the spiral of the outer peripheral rib 5. The “direction of the spiral” here refers to the direction of winding when the center of the spiral is directed downward. At this time, since the earth and sand in the course of the pile are discharged upward by the outer peripheral rib 5, the placing can be performed smoothly. At the time of placing, the inner peripheral rib 4 acts so as to resist torsion occurring in the pile, so that it has sufficient strength against torsion.

また、埋設されている杭を引き抜く際には、図5(B)に示すように、外周リブ5の螺旋の向きとは逆向きに回転させる。この際には、杭に生じるねじりに対して外周リブ5が抵抗するように作用をすることにより、杭を折らずに抜くことができる。   Moreover, when pulling out the buried pile, as shown in FIG. 5 (B), the pile is rotated in the direction opposite to the spiral direction of the outer peripheral rib 5. In this case, the pile can be pulled out without breaking by acting so that the outer peripheral rib 5 resists torsion occurring in the pile.

この杭は、木製の芯材1の外周をプラスチック被膜2で被覆した構成とすることにより、木製杭の軽量でコストが安いという長所と、プラスチック製杭の腐食しないという長所とが併せて得られる。プラスチック製杭や金属製杭に比べて軽いので、人力で持つことができ、作業性が良好である。   In this pile, the outer periphery of the wooden core 1 is covered with the plastic coating 2, so that the advantage that the wooden pile is light and low in cost and the advantage that the plastic pile is not corroded are obtained. . Since it is lighter than plastic piles and metal piles, it can be held by manpower and has good workability.

上記実施形態の杭は、内周リブ4および外周リブ5を有するが、外周リブ5はなくてもよい。また、上記実施形態の杭は、下端が先細りの円錐状に形成されているが、下端が水平に切り取られた形状であってもよい。その場合、下端面にもプラスチック被膜2で被覆する。プラスチック被膜2の上端部分2aは、場合によっては設けなくてもよい。   Although the pile of the said embodiment has the inner peripheral rib 4 and the outer peripheral rib 5, the outer peripheral rib 5 does not need to be. Moreover, although the lower end is formed in the cone shape whose taper is a taper of the said embodiment, the shape by which the lower end was cut off horizontally may be sufficient. In that case, the lower end surface is also covered with the plastic coating 2. The upper end portion 2a of the plastic coating 2 may not be provided depending on circumstances.

(A)はこの発明の実施形態にかかる杭の正面図、(B)はその平面図である。(A) is a front view of the pile concerning embodiment of this invention, (B) is the top view. 同杭の断面図である。It is sectional drawing of the same pile. 同杭の芯材の原型の正面図である。It is a front view of the prototype of the core material of the pile. 同杭の芯材の正面図である。It is a front view of the core material of the pile. (A)は打設時の杭の回転方向を示す説明図、(B)は引抜き時の杭の回転方向を示す説明図である。(A) is explanatory drawing which shows the rotation direction of the pile at the time of placement, (B) is explanatory drawing which shows the rotation direction of the pile at the time of extraction. 従来のプラスチック製杭の斜視図である。It is a perspective view of the conventional plastic pile.

符号の説明Explanation of symbols

1…芯材
1a…下端部
2…プラスチック被膜
3…溝
4…内周リブ
5…外周リブ
DESCRIPTION OF SYMBOLS 1 ... Core material 1a ... Lower end part 2 ... Plastic film 3 ... Groove 4 ... Inner peripheral rib 5 ... Outer peripheral rib

Claims (2)

外周に螺旋状の溝が形成された木製の芯材と、この芯材の少なくとも外周および下端部を被覆し、かつ前記溝に嵌り込んだ螺旋状の内周リブを有するプラスチック被膜とでなることを特徴とする杭。   A wooden core material having a spiral groove formed on the outer periphery, and a plastic film covering at least the outer periphery and the lower end of the core material and having a spiral inner peripheral rib fitted into the groove. Pile characterized by. 請求項1において、前記プラスチック被膜の外周に、前記内周リブと逆向きの螺旋状をした外周リブを設けた杭。   The pile according to claim 1, wherein an outer peripheral rib having a spiral shape opposite to the inner peripheral rib is provided on the outer periphery of the plastic coating.
JP2008089771A 2008-03-31 2008-03-31 Pile Pending JP2009243111A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102619225A (en) * 2012-04-01 2012-08-01 赵立华 Embedding construction method of screw pile
CN114108615A (en) * 2021-11-02 2022-03-01 南京钜力智能制造技术研究院有限公司 Prefabricated tubular pile

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102619225A (en) * 2012-04-01 2012-08-01 赵立华 Embedding construction method of screw pile
CN114108615A (en) * 2021-11-02 2022-03-01 南京钜力智能制造技术研究院有限公司 Prefabricated tubular pile

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