JP3032351B2 - Expanded pile with cloth cylinder - Google Patents
Expanded pile with cloth cylinderInfo
- Publication number
- JP3032351B2 JP3032351B2 JP3272656A JP27265691A JP3032351B2 JP 3032351 B2 JP3032351 B2 JP 3032351B2 JP 3272656 A JP3272656 A JP 3272656A JP 27265691 A JP27265691 A JP 27265691A JP 3032351 B2 JP3032351 B2 JP 3032351B2
- Authority
- JP
- Japan
- Prior art keywords
- pile
- cloth cylinder
- diameter
- ready
- outer diameter
- 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.)
- Expired - Fee Related
Links
Landscapes
- Piles And Underground Anchors (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、既製杭に装着した袋体
の中にセメントミルクやコンクリート等を注入して拡大
部を形成させるのに用いられる布製筒体を装着した拡底
杭に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an expanded bottom pile equipped with a cloth cylinder used to form an enlarged portion by injecting cement milk, concrete or the like into a bag mounted on a ready-made pile. is there.
【０００２】[0002]
【従来の技術】従来より、高い鉛直支持力を発現させる
ために布製筒体を有した既製杭が開発されている（特開
昭６１−１２２３２４号公報）。この杭は例えば図３に
示すように、既製杭の先端部の外周に布製筒体が装着さ
れた杭であり、予め掘削された土中の所定深さの孔に埋
め込まれた後、布製筒体内に杭中空部に設置された注入
管を通して一定の圧力がかかったセメントミルク等の固
結性流動体が注入できる構造となっている。2. Description of the Related Art Conventionally, a ready-made pile having a cloth cylinder has been developed in order to express a high vertical supporting force (Japanese Patent Laid-Open No. 61-122324). As shown in FIG. 3, for example, this pile is a pile in which a cloth cylinder is attached to the outer periphery of the tip of a ready-made pile, and after being embedded in a hole of a predetermined depth in soil excavated in advance, the cloth cylinder It has a structure in which a solidified fluid, such as cement milk, to which a certain pressure is applied can be injected into the body through an injection pipe provided in a hollow portion of the pile.
【０００３】[0003]
【発明が解決しようとする課題】ところが、この杭は杭
径が例えば５００〜６００ｍｍφと大きくなり、それに
伴って布製筒体の径が９００〜１０００ｍｍφと大きく
なった場合に、注入時に布製筒体に大きな引張り力が作
用するため、布製筒体が破れるといったこともあった。
更には、既製杭と固結性流動体硬化後の球根との付着力
を高める目的で既製杭表面に凹凸加工を施した場合に
は、杭体に断面欠損が生じるため、杭の吊り込み時など
に杭体に亀裂を生じ易いといった問題もあった。また、
注入する固結性流動体の注入量が多くなって不経済であ
るのみならず、注入に多大な時間を要するといった問題
があった。However, when the pile diameter of the pile is increased to, for example, 500 to 600 mmφ and the diameter of the cloth cylinder is increased to 900 to 1000 mmφ in accordance with the pile diameter, the pile is formed into a cylindrical shape at the time of injection. Since a large tensile force acts, the cloth cylinder may be broken.
Furthermore, if the surface of the preformed pile is subjected to unevenness in order to increase the adhesion between the prefabricated pile and the bulb after hardening of the solidifying fluid, the pile will have a cross-sectional defect. There was also a problem that the pile body was easily cracked. Also,
There is a problem that the amount of the solidifying fluid to be injected is increased, which is not only uneconomical but also requires a long time for the injection.
【０００４】本発明の目的は、注入時に布製筒体に作用
する引張り力が小さくなり布製筒体が破れることがな
く、更には凹凸加工を施しても亀裂の入りにくい先端杭
であり、かつ固結性流動体の注入量が少なくて経済的で
あり、これによって固結性流動体の注入に要する時間も
少なくて済む先端杭を提供することである。[0004] It is an object of the present invention to provide a tip pile in which the tensile force acting on the cloth cylinder at the time of pouring is small and the cloth cylinder is not broken, and furthermore, it is hard to be cracked even when irregular processing is performed. It is an object of the present invention to provide a tip pile which is economical because the amount of caking fluid to be injected is small and the time required for injecting caking fluid is short.
【０００５】[0005]
【課題を達成するための手段】本発明は、拡径部分を有
する既製杭であって、その拡径部分の外周面に布製筒体
がその上下両端部で装着されており、該既製杭の本体部
分の外径（Ｄ１）が３００〜６００ｍｍで、拡径部分の
外径（Ｄ２）が該本体部分の外径（Ｄ１）よりも５０〜
１００ｍｍ大きく、且つ布製筒体の径（Ｄ３）が該拡径
部分の外径（Ｄ２）よりも２００〜３５０ｍｍ大きいこ
とを特徴とする布製筒体付き拡底杭、である。以下、図
面を用いて本発明を詳細に説明する。SUMMARY OF THE INVENTION The present invention relates to a prefabricated pile having an enlarged diameter portion, wherein a cloth cylinder is provided on an outer peripheral surface of the enlarged diameter portion.
There are mounted at the upper and lower end portions, the body portion of該既made pile
Minute outer diameter (D1) is 300-600mm,
The outer diameter (D2) is 50 to 50 times larger than the outer diameter (D1) of the main body.
100 mm larger and the diameter (D3) of the cloth cylinder is the expanded diameter.
Fabric cylindrical body with拡底piles, wherein the 200~350mm larger this <br/> than the outer diameter of the portion (D2), a. Hereinafter, the present invention will be described in detail with reference to the drawings.
【０００６】図１は、本発明の杭の一例で、拡径部分２
に布製筒体３を装着した既製コンクリート杭１の布製筒
体内に、セメントミルク等の固結性流動体４を圧入した
ときの状態を示した半断面図である。この杭は、通常最
下端の杭として用いられる。本発明に用いられる既製杭
は、鋼管杭、コンクリート杭、鋼管コンクリート複合杭
等である。本発明において、既製杭の本体部分の外径
（Ｄ１）は３００〜６００ｍｍで、且つ拡径部分の外径
（Ｄ２）は本体部分の外径（Ｄ１）よりも５０〜１００
ｍｍ大きいことが必要である。５０ｍｍより小さい拡大
径では拡大径を設けた効果が少なく、１００ｍｍを越え
ると布製筒体の膨張による拡大効果が少なくなる。尚、
杭長は２〜５ｍであることが実用的である。FIG. 1 shows an example of a pile according to the present invention.
FIG. 2 is a half sectional view showing a state in which a solidifying fluid 4 such as cement milk is pressed into a cloth cylinder of a ready-made concrete pile 1 having a cloth cylinder 3 mounted thereon. This pile is usually used as the lowermost pile. The ready-made pile used in the present invention is a steel pipe pile, a concrete pile, a steel pipe-concrete composite pile, or the like. In the present invention, the outer diameter (D1) of the main body portion of the ready-made pile is 300 to 600 mm , and the outer diameter (D2) of the enlarged diameter portion is 50 to 100 than the outer diameter (D1) of the main body portion.
mm . If the enlarged diameter is smaller than 50 mm, the effect of providing the enlarged diameter is small, and if it exceeds 100 mm, the expanded effect due to the expansion of the cloth cylinder is reduced. still,
It is practical that the pile length is 2 to 5 m.
【０００７】本発明に使用する布製筒体の材質は、固結
性流動体の脱水性と強度の点からナイロン、ポリアミ
ド、ポリエステル、ビニロン、ポリプロピレン等の合成
繊維であることが好ましい。このように固結性流動体の
水を透過して外へ排出できる材質にすると、施工に際し
てこの杭体の布製筒体内にセメントミルク等の固結性流
動体が注入され、所定の圧力例えば６〜１０ｋｇ／ｃｍ
2 の注入圧力により固結性流動体中の水分が布製筒体表
面を通して脱水され、固結性流動体は硬化後に緻密で強
固な硬化体となるので好ましい。[0007] The material of the cloth cylinder used in the present invention is preferably synthetic fibers such as nylon, polyamide, polyester, vinylon and polypropylene from the viewpoint of dehydration and strength of the caking fluid. If the material of the caking fluid is made of a material that can permeate water and be discharged to the outside, caking fluid such as cement milk is injected into the fabric cylinder of this pile at the time of construction, and a predetermined pressure, for example, 6 -10 kg / cm
Moisture in the caking fluid is dehydrated through the surface of the cloth cylinder by the injection pressure of 2 , and the caking fluid becomes a dense and strong cured product after curing, which is preferable.
【０００８】布製筒体は円筒形であり、その両端部は既
製杭に均等に取り付け易いように縮む構造としたり、タ
ックを付けたり、またバンドとの接触部を折り返して二
重にして補強する構造としたりしても良い。布製筒体
は、最初からシームレスで織っても良いし、或いはスパ
イラル状に縫製しても良い。本発明において、布製筒体
の径（Ｄ３）は、既製杭の拡径部分の外径（Ｄ２）より
も２００〜３５０ｍｍ大きいことが必要である。２００
ｍｍより小さい径及び３５０ｍｍを越える径では、布製
筒体の膨張による拡大効果が少なくなる。 The cloth cylinder has a cylindrical shape, and its both ends are structured so as to be shrunk so as to be easily attached to a ready-made stake, tacked, or folded back at the contact portion with the band to reinforce it. It may be structured. The cloth cylinder may be seamlessly woven from the beginning or may be sewn in a spiral shape. In the present invention, the diameter of the fabric tube body (D3), it is necessary that 200~350mm larger than the outer diameter of the expansion diameter portion of the ready-made pile (D2). 200
For smaller diameters and larger than 350 mm, fabric
The expansion effect due to the expansion of the cylinder is reduced.
【０００９】この布製筒体の上下端がバンド５によって
既製杭に取り付けられている。布製筒体装着部Ａの拡大
断面図を図２に示す。バンドは通常梱包用帯鋼やワイヤ
ーロープ等が用いられる。バンドは通常１〜４ｔｏｎ程
度の締め付け力で固着されている。梱包用帯鋼の場合、
その幅は３０〜７０ｍｍ、ワイヤーロープの場合は直径
１０〜２０ｍｍ程度である。また、装着部分の布製筒体
と既製杭の間にクッション材６を全周にわたって配する
と固結性流動体の漏れの防止に対して安全である。クッ
ション材の材質はポリ塩化ビニル、ポリエチレン、ポリ
ウレタン等の発泡体、或いはラバー等、バンド締め付け
後に布製筒体と杭体との空隙が塞がるような材質のもの
が挙げられる。クッション材の幅はバンドよりも広いも
のであればよく、５０〜２００ｍｍ程度のものが好まし
い。更にまた、杭本体に突起９を設け、その両側でバン
ドを止めると固結性流動体の漏れの防止に対して更に安
全となる。The upper and lower ends of the cloth cylinder are attached to the ready-made pile by bands 5. FIG. 2 shows an enlarged cross-sectional view of the cloth tube mounting portion A. As the band, a band steel for packing or a wire rope is usually used. The band is usually fixed with a fastening force of about 1 to 4 ton. For packing strips,
Its width is 30 to 70 mm, and in the case of a wire rope, it is about 10 to 20 mm in diameter. Further, if the cushion material 6 is arranged over the entire circumference between the cloth cylinder and the ready-made pile at the mounting portion, it is safe to prevent leakage of the solidifying fluid. Examples of the material of the cushion material include a foam such as polyvinyl chloride, polyethylene, and polyurethane, and a material such as rubber that closes the gap between the cloth cylinder and the pile after band tightening. The width of the cushion material may be wider than that of the band, and is preferably about 50 to 200 mm. Furthermore, when the protrusion 9 is provided on the pile main body and the band is stopped on both sides thereof, it is further safe to prevent leakage of the caking fluid.
【００１０】また、布製筒体で覆われた拡径部分の既製
杭の外周面は、凹凸加工されていることが好ましい。こ
のようにすれば、固結性流動体の硬化後の球根部分と既
製杭との付着力が著しく大きくなる。凹部分７の寸法
は、幅５０〜２００ｍｍ、深さ５〜２０ｍｍが適当であ
る。この凹部分は複数あることが望ましい。ただし、こ
のとき凹部分の外径が、本体部分の外径Ｄ１よりも大き
くなっていることが必要である。It is preferable that the outer peripheral surface of the ready-made pile at the enlarged diameter portion covered with the cloth cylinder is subjected to unevenness processing. In this case, the adhesive force between the hardened bulb portion of the caking fluid and the ready-made pile is significantly increased. The dimensions of the concave portion 7 are suitably 50 to 200 mm in width and 5 to 20 mm in depth. It is desirable that there be a plurality of these concave portions. However, at this time, the outer diameter of the concave portion needs to be larger than the outer diameter D1 of the main body.
【００１１】更にまた、この杭は布製筒体内に固結性流
動体を注入するための注入管８を有している。注入管は
鉄管や塩化ビニル管等が使用される。この注入管は、杭
の中空部に設置して先端部を布製筒体内に連通させても
よいし、或いは杭体内に設置して先端部を布製筒体内に
連通させてもよい。Further, this pile has an injection pipe 8 for injecting a solidifying fluid into the cloth cylinder. As an injection pipe, an iron pipe, a vinyl chloride pipe, or the like is used. This injection pipe may be installed in the hollow part of the pile and the tip part may communicate with the cloth cylinder, or may be installed in the pile body and the tip part may communicate with the cloth cylinder.
【００１２】[0012]
【実施例】以下、実施例により本発明を詳細に説明す
る。本実施例に用いた杭は図１に示した構造のものであ
る。既製杭としては杭本体径５００ｍｍφ、肉厚８０ｍ
ｍ、長さ４ｍの既製コンクリート杭を使用した。この杭
の下側３ｍは外径６００ｍｍφに拡大されている。この
拡大部分の下端から２．５ｍにかけて外径９００ｍｍ
φ、長さ２．３ｍのナイロン製の布製筒体を被せ、両端
を直径１０ｍｍのワイヤーロープによって約１．５ｔｏ
ｎの力で締め付け、ワイヤークリップ１０によって固定
させた。ナイロン製の筒体はスパイラル状１１に縫製し
たもので、両端はタックをとって装着部分の径が６３０
ｍｍとなる構造とした。また装着部は固結性流動体が注
入時に漏出しないようにクッション材を杭本体と布製筒
体との間に配した。The present invention will be described below in detail with reference to examples. The pile used in this embodiment has the structure shown in FIG. Pile body diameter 500mmφ, wall thickness 80m as ready-made pile
m, a 4 m-length ready-made concrete pile was used. The lower 3 m of this pile is expanded to an outer diameter of 600 mmφ. The outer diameter is 900 mm from the lower end of this enlarged part to 2.5 m.
φ, covered with a 2.3 m long nylon cloth cylinder, about 1.5 to both ends with a 10 mm diameter wire rope
n, and fixed by the wire clip 10. The nylon cylinder is sewn in a spiral shape 11 and both ends are tacked so that the diameter of the mounting part is 630.
mm. In the mounting portion, a cushion material was disposed between the pile body and the cloth cylinder so that the caking fluid did not leak at the time of injection.
【００１３】また、布製筒体が被せられた拡大部分の杭
外周面に、幅１０ｃｍ深さ１ｃｍの凹部を２０ｃｍ間隔
で７箇所設けた。このような本発明の杭を下杭として全
長１５ｍの杭を施工した。上杭は外径５００ｍｍφ長さ
１１ｍの既製コンクリート杭であった。上杭と下杭は従
来通り溶接によって接続した。施工方法はプレオーガー
で先端拡大掘削して根固め液を注入した後、杭を所定深
度まで沈設し、地上より注入管によって布製筒体内にセ
メントミルクを注入する方法で行った。In addition, seven recesses having a width of 10 cm and a depth of 1 cm are provided at intervals of 20 cm on the outer peripheral surface of the pile at the enlarged portion covered with the cloth cylinder. A pile having a total length of 15 m was constructed using such a pile of the present invention as a lower pile. The upper pile was a ready-made concrete pile having an outer diameter of 500 mm and a length of 11 m. The upper and lower piles were connected by welding as before. The method of construction was such that the extruded tip was excavated with a pre-auger and the consolidation liquid was injected, then the pile was sunk to a predetermined depth, and cement milk was injected into the cloth cylinder from the ground by an injection pipe.
【００１４】施工の結果、従来の布製筒体付既製杭は布
製筒体内に注入するセメントミルクの量が約２．０立方
ｍであるのに対し、本発明の杭は約１．６立方ｍと少な
くて済み、経済的であった。尚且つ注入時間が一本当り
約１０分短縮されて施工能率も大幅に向上した。また、
注入量が従来に比べて少ないため、セメントミルク注入
時に布製筒体に作用する引張応力が小さくなるので、布
製筒体の安全性が向上し、注入圧力が８ｋｇ／ｃｍ2 に
至っても布製筒体が破裂したものはなかった。更にま
た、拡大部分に設けた凹部が杭本体部の外径よりも大き
いために断面欠損がなく、杭吊り込み時に亀裂が生じる
ことは全くなかった。As a result of the construction, the amount of cement milk injected into the cloth cylinder of the conventional pile with the cloth cylinder is about 2.0 cubic meters, whereas the pile of the present invention is about 1.6 cubic meters. And it was economical. In addition, the injection time was shortened by about 10 minutes per one, and the construction efficiency was greatly improved. Also,
Since the injection amount is smaller than before, the tensile stress acting on the cloth cylinder at the time of injecting the cement milk is reduced, so that the safety of the cloth cylinder is improved, and even if the injection pressure reaches 8 kg / cm 2 , the cloth cylinder can be used. There were no ruptures. Furthermore, since the concave portion provided in the enlarged portion was larger than the outer diameter of the pile main body portion, there was no cross-sectional defect, and no crack was generated when the pile was suspended.
【００１５】[0015]
【発明の効果】本発明による杭を用いることにより、布
製筒体内に注入する固結性流動体の注入量を減すことが
でき注入時に布製筒体に作用する引張り力が小さくなる
ために布製筒体の破裂に対する安全性が向上する。その
結果、高い注入圧力をかけることができるので、周辺地
盤を締固める効果が増して支持力が増大する。また、注
入に要する時間も短縮されて施工能率が向上する。尚且
つ既製杭に断面欠損がないので施工上も安全である。ま
た、固結性流動体の注入量が少なくてすみ経済的でもあ
る。By using the pile according to the present invention, it is possible to reduce the injection amount of the solidifying fluid to be injected into the cloth cylinder, and to reduce the tensile force acting on the cloth cylinder at the time of injection. Safety against rupture of the cylinder is improved. As a result, a high injection pressure can be applied, so that the effect of compacting the surrounding ground increases and the supporting force increases. Further, the time required for the injection is shortened, and the construction efficiency is improved. In addition, since there is no section defect in the ready-made pile, construction is safe. In addition, the amount of the caking fluid to be injected is small, and it is economical.
【図１】本発明の杭の布製筒体内に、固結性流動体を注
入して袋体を拡大膨張させたときの半断面図である。FIG. 1 is a half cross-sectional view when a solidifying fluid is injected into a cloth cylinder of a pile of the present invention to expand and inflate a bag.
【図２】図１に示す布製筒体装着部Ａの拡大断面図であ
る。FIG. 2 is an enlarged sectional view of a cloth tubular body mounting portion A shown in FIG.
【図３】従来の杭の布製筒体内に、固結性流動体を注入
して袋体を拡大膨張させたときの半断面図である。FIG. 3 is a half cross-sectional view when a caking fluid is injected into a cloth body of a conventional pile to expand and inflate a bag body.
１ 既製杭本体部 ２ 拡大部分 ３ 布製筒体 ４ 固結性流動体（球根部） ５ バンド ６ クッション材 ７ 凹部 ８ 注入管 ９ 突起 １０ ワイヤークリップ １１ スパイラル縫製 DESCRIPTION OF SYMBOLS 1 Ready-made pile main body part 2 Enlarged part 3 Cloth cylinder 4 Solidified fluid (bulb part) 5 Band 6 Cushion material 7 Depression 8 Injection pipe 9 Projection 10 Wire clip 11 Spiral sewing
Claims (1)
拡径部分の外周面に布製筒体がその上下両端部で装着さ
れており、該既製杭の本体部分の外径（Ｄ１）が３００
〜６００ｍｍで、拡径部分の外径（Ｄ２）が該本体部分
の外径（Ｄ１）よりも５０〜１００ｍｍ大きく、且つ布
製筒体の径（Ｄ３）が該拡径部分の外径（Ｄ２）よりも
２００〜３５０ｍｍ大きいことを特徴とする布製筒体付
き拡底杭。1. A ready-made pile having upset, the outer diameter of the outer periphery are attached fabric cylinder is in its upper and lower end portions in the surface, the body portion of the該既made piles of the enlarged diameter portion (D1) Is 300
The outer diameter (D2) of the enlarged diameter part is the main body part.
50 to 100 mm larger than the outer diameter (D1) of
The diameter (D3) of the cylindrical body is larger than the outer diameter (D2) of the enlarged diameter portion.
An expanded pile with a tubular body characterized by being 200 to 350 mm larger .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3272656A JP3032351B2 (en) | 1991-10-21 | 1991-10-21 | Expanded pile with cloth cylinder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3272656A JP3032351B2 (en) | 1991-10-21 | 1991-10-21 | Expanded pile with cloth cylinder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05112933A JPH05112933A (en) | 1993-05-07 |
| JP3032351B2 true JP3032351B2 (en) | 2000-04-17 |
Family
ID=17516966
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3272656A Expired - Fee Related JP3032351B2 (en) | 1991-10-21 | 1991-10-21 | Expanded pile with cloth cylinder |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3032351B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6401871B2 (en) * | 1998-02-26 | 2002-06-11 | Otis Elevator Company | Tension member for an elevator |
| JP6049844B1 (en) * | 2015-11-30 | 2016-12-21 | 勇平 八百板 | Uneven settlement control structure and construction method |
-
1991
- 1991-10-21 JP JP3272656A patent/JP3032351B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH05112933A (en) | 1993-05-07 |
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