JP2005282356A - Joint part structure of pile - Google Patents

Joint part structure of pile Download PDF

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Publication number
JP2005282356A
JP2005282356A JP2005178354A JP2005178354A JP2005282356A JP 2005282356 A JP2005282356 A JP 2005282356A JP 2005178354 A JP2005178354 A JP 2005178354A JP 2005178354 A JP2005178354 A JP 2005178354A JP 2005282356 A JP2005282356 A JP 2005282356A
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pile
fitting end
end portion
joint
outer fitting
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JP2005178354A
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JP3877746B2 (en
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Kimisuke Tagano
公甫 多賀野
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Kubota Corp
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Kubota Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a joint part structure of a pile having a high bending resistance by suppressing the deformation of the joint part of the pile. <P>SOLUTION: In this joint part structure of the pile, a pair of outer fitting end part 4 and an inner fitting end part 6 allowed to fit to each other are formed into axially adjacent first pile 1 and a second pile 2. With the outer fitting end part fitted to the inner fitting end part, the first pile is connected to the second pile. A separation stop means for stopping that the outer fitting part and the inner fitting part are radially separated from the first pile or the second pile is mounted at the tip part 10 of the outer fitting end part and the base end part 9 of the inner fitting end part with the outer fitting end part fitted to the inner fitting end part. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は、互いに嵌合自在な一対の外嵌端部と内嵌端部とを軸芯方向に隣接する第１杭と第２杭とに各別に形成し、前記外嵌端部と前記内嵌端部とを嵌合させた状態で、前記第１杭と前記第２杭とを連結してある杭の継手部構造に関する。 The present invention forms each another in a first pile and a second pile adjacent the inner Hamatan portion and mutually fitted freely pair of outer Hamatan portion in the axial center direction, within the said outer Hamatan portion It is related with the joint part structure of the pile which connected the said 1st pile and the said 2nd pile in the state which made the fitting end part fit.

従来、この種の杭の継手部構造としては、図７に示すごとくねじ式のものがあった（例えば、特許文献１参照）。
即ち、連接する一方の杭の端部には雄ねじ部３０を形成し、他方の杭の端部には雌ねじ部３１を形成しておく。例えば、このうち雌ねじ部３１を形成した杭を先ず地中に埋設し、雄ねじ部３０を形成した杭を前記埋設した杭に螺合させ、連結するのである。この螺合作業は、双方の杭の軸芯Ｚ１，Ｚ２どうしを一致させた状態で行う。
杭の継手部構造がねじ式であれば、杭の長手方向に沿った多数のねじ山が係合する。よって、連結が終了したのち杭に作用する曲げ力等に対して高い耐力を有することとなる。 Conventionally, as this type of pile joint structure, there has been a screw type as shown in FIG. 7 (see, for example, Patent Document 1).
That is, the external thread part 30 is formed in the edge part of the one pile connected, and the internal thread part 31 is formed in the edge part of the other pile. For example, a pile in which the female screw portion 31 is formed is first embedded in the ground, and a pile in which the male screw portion 30 is formed is screwed into and connected to the embedded pile. This screwing operation is performed in a state in which the axial centers Z1 and Z2 of both piles are made to coincide.
If the joint part structure of a pile is a screw type, many screw threads along the longitudinal direction of a pile will engage. Therefore, it has high proof stress with respect to the bending force etc. which act on a pile after a connection is complete | finished.

特開昭６１−２４８０９号公報JP 61-24809 A

しかし、上記従来の杭の継手部構造においても次のような問題があった。
例えば、継手部に強い曲げ力が加わった場合には、図７（イ）に示すごとく、第１杭１の基端部９と第２杭２の先端部１０とが、および、第１杭１の先端部１０と第２杭２の基端部９とが離間する状態に継手部が変形する場合がある。当該変形が生じた場合には、杭に対する曲げ力は、第１杭１の外嵌端部４と第２杭２の内嵌端部６との間で未だ当接している部分に集中し、前記外嵌端部４と前記内嵌端部６との変形は益々増大して、第１杭１と第２杭２との連結が外れるおそれがある。
また、図７（ロ）に示すごとく、継手部に強い引張り力が加わった場合、或いは、図７（ハ）に示すごとく、継手部に強い圧縮力が加わった場合にも、やはり、基端部９と先端部１０とが離間して、第１杭１と第２杭２とが抜け出し易い状態となる。これらは、係合部７と被係合部８との係合に抗って第１杭１と第２杭２とが離間・近接する結果、外嵌端部４は拡径し、内嵌端部６は縮径することに起因する。
このように、変形が生じ易い継手部は、十分な継手耐力を発揮することができず、未だ改善の余地があった。
本発明の目的は、このような従来技術の欠点を解消し、杭の継手部の変形を抑制して、高い曲げ耐力を備えた杭の継手部構造を提供することにある。 However, the above-described conventional pile joint structure has the following problems.
For example, when a strong bending force is applied to the joint portion, the base end portion 9 of the first pile 1 and the distal end portion 10 of the second pile 2 and the first pile as shown in FIG. The joint portion may be deformed in a state where the distal end portion 10 of 1 and the proximal end portion 9 of the second pile 2 are separated from each other. When the deformation occurs, the bending force on the pile concentrates on the portion still in contact between the outer fitting end 4 of the first pile 1 and the inner fitting end 6 of the second pile 2, The deformation of the outer fitting end portion 4 and the inner fitting end portion 6 increases more and the connection between the first pile 1 and the second pile 2 may be broken.
In addition, when a strong tensile force is applied to the joint portion as shown in FIG. 7 (B), or when a strong compressive force is applied to the joint portion as shown in FIG. The part 9 and the tip part 10 are separated from each other, and the first pile 1 and the second pile 2 are easily pulled out. As a result of the first pile 1 and the second pile 2 being separated and close to each other against the engagement between the engaging portion 7 and the engaged portion 8, the outer fitting end portion 4 is expanded in diameter and the inner fitting is achieved. The end 6 is caused by the diameter reduction.
As described above, the joint portion that is likely to be deformed cannot exhibit sufficient joint yield strength, and there is still room for improvement.
An object of the present invention is to provide a pile joint structure having a high bending strength by eliminating the drawbacks of the prior art and suppressing deformation of the joint portion of the pile.

（構成１）
本発明の杭の継手部構造は、請求項１に記載したごとく、前記外嵌端部と前記内嵌端部とを嵌合させた状態で、その外嵌端部と内嵌端部とが前記第１杭あるいは前記第２杭の径方向に離間するのを阻止するための離間阻止手段を、前記外嵌端部の先端部と前記内嵌端部の基端部に設けてある点に特徴を有する。
（作用・効果）
筒状継手構造において断面変形が最も生じ易いのは開口端部である。本構成の場合にも、第１杭の先端部および第２杭の先端部が、最も変形し易いと考えられる。つまり、先端部は、曲げ・軸力が作用すると管の周方向の力に対する剛性が低く、径方向の変形が大きくなるためである。
しかし、本構成であれば、外嵌端部の先端部が、内嵌端部の基端部から離間するのを阻止するから、前記先端部の変形を有効に防止することができ、曲げ力等に対して高い耐力を発揮する継手部を得ることができる。 (Configuration 1)
Joint structure of the pile of the present invention, as described in 請 Motomeko 1, in a state in which the outer has a Hamatan portion fitted between the inner Hamatan portion, and the outer Hamatan portion and the inner Hamatan portion Is provided with separation preventing means for preventing separation of the first pile or the second pile in the radial direction at the distal end portion of the outer fitting end portion and the proximal end portion of the inner fitting end portion. It has the characteristics.
(Action / Effect)
In the cylindrical joint structure, it is the open end that is most likely to undergo cross-sectional deformation. Even in the case of this configuration, it is considered that the tip of the first pile and the tip of the second pile are most easily deformed. That is, when the bending / axial force is applied to the distal end portion, the rigidity against the circumferential force of the tube is low, and the radial deformation is increased.
However, with this configuration, the distal end portion of the outer fitting end portion is prevented from being separated from the proximal end portion of the inner fitting end portion, so that the deformation of the distal end portion can be effectively prevented, and the bending force It is possible to obtain a joint portion that exhibits a high yield strength against the above.

（構成２）
本発明の杭の継手部構造は、請求項２に記載したごとく、前記外嵌端部と前記内嵌端部とを嵌合させた状態で、その外嵌端部と内嵌端部とが前記第１杭あるいは前記第２杭の径方向に離間するのを阻止するための離間阻止手段を、前記内嵌端部の先端部と前記外嵌端部の基端部に設けてある点に特徴を有する。
（作用・効果）
筒状継手構造において断面変形が最も生じ易いのは開口端部である。本構成の場合にも、第１杭の先端部および第２杭の先端部が、最も変形し易いと考えられる。つまり、先端部は、曲げ・軸力が作用すると管の周方向の力に対する剛性が低く、径方向の変形が大きくなるためである。
しかし、本構成であれば、内嵌端部の先端部が、外嵌端部の基端部から離間するのを阻止するから、前記先端部の変形を有効に防止することができ、曲げ力等に対して高い耐力を発揮する継手部を得ることができる。 (Configuration 2)
Joint structure of the pile of the present invention, as described in 請 Motomeko 2, in a state in which the outer has a Hamatan portion fitted between the inner Hamatan portion, and the outer Hamatan portion and the inner Hamatan portion Is provided with separation preventing means for preventing the first pile or the second pile from separating in the radial direction at the distal end portion of the inner fitting end portion and the proximal end portion of the outer fitting end portion. It has the characteristics.
(Action / Effect)
In the cylindrical joint structure, it is the open end that is most likely to undergo cross-sectional deformation. Even in the case of this configuration, it is considered that the tip of the first pile and the tip of the second pile are most easily deformed. That is, when the bending / axial force is applied to the distal end portion, the rigidity against the circumferential force of the tube is low, and the radial deformation is increased.
However, with this configuration, the distal end portion of the inner fitting end portion is prevented from being separated from the proximal end portion of the outer fitting end portion, so that the deformation of the distal end portion can be effectively prevented, and the bending force It is possible to obtain a joint portion that exhibits a high yield strength against the above.

（構成３）
本発明の杭の継手部構造は、請求項３に記載したごとく、前記軸芯方向から互いに嵌合自在な先端凸部と基端溝部とからなる離間阻止手段を設けることができる。
（作用・効果）
本構成であれば、継手部に曲げ力が加わった際の先端凸部と基端溝部との離間を抑制できる。特に、内嵌端部および外嵌端部の先端部の断面形状が維持されて、高い耐力を備えた継手部を得ることができる。 (Configuration 3)
As described in claim 3, the pile joint structure according to the present invention can be provided with a separation preventing means composed of a leading convex portion and a proximal groove portion that can be fitted to each other in the axial direction .
(Action / Effect)
If it is this structure, separation | spacing with the front-end | tip convex part and proximal end groove part at the time of a bending force being added to a joint part can be suppressed. In particular, the cross-sectional shapes of the inner fitting end portion and the outer fitting end portion are maintained, and a joint portion having high proof stress can be obtained.

（構成４）
本発明の杭の継手部構造は、請求項４に記載したごとく、前記先端部に前記軸芯方向に対して略垂直な端面を備えるとともに、前記基端部に前記軸芯方向に対して略垂直な端面を備えて、前記凸部と前記溝部との嵌合によって前記端面どうしが上下に対向するように構成することができる。 (Configuration 4)
As described in claim 4, the pile joint structure according to the present invention includes an end surface that is substantially perpendicular to the axial direction at the distal end portion, and is substantially at the proximal end portion with respect to the axial direction. A vertical end surface may be provided, and the end surfaces may be opposed to each other by fitting the convex portion and the groove portion .

（構成５）
本発明の杭の継手部構造は、請求項５に記載したごとく、前記凸部と前記溝部との夫々が前記軸芯方向に対して略平行な側面を備え、前記凸部と前記溝部との嵌合によって前記側面どうしが杭径方向に対向するように構成することができる。 (Configuration 5)
As described in claim 5, the pile joint structure of the present invention includes a side surface in which each of the convex portion and the groove portion is substantially parallel to the axial direction, and the convex portion and the groove portion. It can comprise so that the said side surfaces may oppose a pile radial direction by fitting .

以下に本発明の実施の形態を図面に基づいて説明する。
（概要）
本発明の杭の継手部構造は、図１に示すごとく、例えば、埋設用穴に先に埋設された第１杭１と、当該第１杭１に接続される第２杭２との間に設けられる。
具体的には、前記第１杭１が、第１杭本体３と外嵌端部４とからなり、前記第２杭２が、第２杭本体５と内嵌端部６とからなる。通常の場合には、作業の進行状況を視認し易い等の理由から、前記内嵌端部６を前記外嵌端部４に挿入させて第１杭１と第２杭２とを連結する。
本願発明の杭の継手部構造は、係合部７を形成した外嵌端部４に対して、被係合部８を形成した内嵌端部６を挿入した後、前記内嵌端部６を第２杭２の軸芯Ｚ２の回りに所定角度だけ回転させて係合部７と被係合部８とを係合させ、前記内嵌端部６が前記外嵌端部４から抜け出るのを阻止する状態に両者を固定するものである。 Embodiments of the present invention will be described below with reference to the drawings.
(Overview)
As shown in FIG. 1, the pile joint structure of the present invention is, for example, between the first pile 1 embedded in the embedding hole and the second pile 2 connected to the first pile 1. Provided.
Specifically, the first pile 1 includes a first pile body 3 and an external fitting end portion 4, and the second pile 2 includes a second pile body 5 and an internal fitting end portion 6. In the normal case, the first pile 1 and the second pile 2 are connected by inserting the inner fitting end portion 6 into the outer fitting end portion 4 for reasons such as easy recognition of the progress of the work.
In the joint part structure of a pile according to the present invention, the inner fitting end portion 6 in which the engaged portion 8 is formed is inserted into the outer fitting end portion 4 in which the engaging portion 7 is formed. Is rotated by a predetermined angle around the axis Z2 of the second pile 2 to engage the engaging portion 7 and the engaged portion 8, and the inner fitting end portion 6 comes out of the outer fitting end portion 4. Both are fixed to the state which prevents.

（係合部および被係合部）
第１杭１および第２杭２は、例えば図１に示す外観を有する。
前記外嵌端部４は、基端部９と先端部１０とから成る。基端部９とは、外嵌端部４のうち第１杭本体３側の部分をいい、先端部１０とは、文字どおり第１杭１の先端部１０近傍の部分をいう。
前記先端部１０から前記基端部９に亘る前記外嵌端部４の内壁部１１は、略円筒状をなす。当該内壁部１１には、第１杭１の軸芯Ｚ１の径方向Ｘに突出した係合部７を設けてある。当該係合部７は、後述するごとく第２杭２の被係合部８と係合する部分である。
前記係合部７は、前記内壁部１１においては、その周方向Ｙに沿って間隔を開けた状態に複数設けてある。本実施形態では、周方向Ｙに沿って四箇所設けてある。個々の係合部７は、軸芯Ｚ１を中心に略９０度の方向に分散配置すると共に、個々の係合部７はおよそ４５度の範囲に亘って延出させてある。
本実施形態においては、前記係合部７は、軸芯Ｚ１方向に沿う方向においても複数箇所に設ける。勿論、当該係合部７は、前記軸芯Ｚ１方向に沿って一つだけ設けるものでもよい。しかし、複数カ所に設けた場合には、杭の長手方向における杭の継手部長さを確実に確保することができるから、より高い曲げ耐力を有する継手部を得ることができる。
軸芯Ｚ１方向に隣接する係合部７どうしの位置関係は、図１に示すごとく軸芯Ｚ１方向に略一致するものとする。このようにして計１６箇所に係合部７を形成する。 (Engagement part and engaged part)
The 1st pile 1 and the 2nd pile 2 have the external appearance shown, for example in FIG.
The outer fitting end portion 4 includes a proximal end portion 9 and a distal end portion 10. The base end portion 9 refers to a portion of the external fitting end portion 4 on the first pile main body 3 side, and the distal end portion 10 literally refers to a portion in the vicinity of the distal end portion 10 of the first pile 1.
An inner wall portion 11 of the outer fitting end portion 4 extending from the distal end portion 10 to the base end portion 9 has a substantially cylindrical shape. The inner wall portion 11 is provided with an engaging portion 7 protruding in the radial direction X of the axial center Z1 of the first pile 1. The engaging portion 7 is a portion that engages with the engaged portion 8 of the second pile 2 as described later.
A plurality of the engaging portions 7 are provided in the inner wall portion 11 at intervals along the circumferential direction Y thereof. In the present embodiment, four locations are provided along the circumferential direction Y. The individual engaging portions 7 are dispersedly arranged in a direction of about 90 degrees around the axis Z1 and the individual engaging portions 7 are extended over a range of about 45 degrees.
In the present embodiment, the engaging portion 7 is provided at a plurality of locations in the direction along the direction of the axis Z1. Of course, only one engagement portion 7 may be provided along the direction of the axis Z1. However, since it can ensure reliably the joint part length of the pile in the longitudinal direction of a pile when it provides in multiple places, the joint part which has higher bending strength can be obtained.
It is assumed that the positional relationship between the engaging portions 7 adjacent in the direction of the axis Z1 substantially coincides with the direction of the axis Z1 as shown in FIG. In this way, the engaging portions 7 are formed at a total of 16 locations.

一方、第２杭２の内嵌端部６も、基端部９と先端部１０とからなる。内嵌端部６の外壁部１２も略円筒状に構成してある。内嵌端部６の外壁部１２には、被係合部８を設ける。当該被係合部８は、第１杭１と同様に第２杭２の軸芯Ｚ２を中心に略９０度の方向に分散配置し、周方向Ｙに沿っておよそ４５度の範囲に亘って延出させてある。当該被係合部８を、軸芯Ｚ２の方向に沿って複数設けると共に、軸芯Ｚ２の方向に隣接する被係合部８どうしを、軸芯Ｚ２の方向に略一致させる。このようにして被係合部８も計１６箇所に形成する。   On the other hand, the inner fitting end portion 6 of the second pile 2 also includes a proximal end portion 9 and a distal end portion 10. The outer wall portion 12 of the inner fitting end portion 6 is also formed in a substantially cylindrical shape. An engaged portion 8 is provided on the outer wall portion 12 of the inner fitting end portion 6. Similar to the first pile 1, the engaged portions 8 are distributed and arranged in a direction of about 90 degrees around the axis Z <b> 2 of the second pile 2, and extend in a range of about 45 degrees along the circumferential direction Y. It is extended. A plurality of the engaged portions 8 are provided along the direction of the axis Z2, and the engaged portions 8 adjacent to each other in the direction of the axis Z2 are substantially aligned with the direction of the axis Z2. In this way, the engaged portions 8 are also formed at a total of 16 locations.

本実施形態では、前記係合部７と前記被係合部８とはアリ溝状に構成する。
即ち、例えば図１に示すごとく、外嵌端部４に形成した係合部７を、第１杭１の縦断面視において、突出先端側ほど幅広な拡大突出部７ａを有する構成とする。
一方の被係合部８は、前記拡大突出部７ａが前記周方向Ｙから挿入可能となるように溝状に構成する。
ただし、拡大突出部７ａであるか溝部８ｂであるかといった形状の差が生じるのは、前記係合部７および前記被係合部８を前記軸芯Ｚ１，Ｚ２の方向において一箇所のみに形成した場合である。図１に示す本実施形態の場合には、前記拡大突出部７ａおよび前記溝部８ｂを軸芯Ｚ１，Ｚ２方向に沿って四箇所に形成してあるから、軸芯方向に隣接する拡大突出部７ａどうしの間には必然的に溝部が形成されることとなって、何れが拡大突出部７ａで何れが溝部８ｂであるかの差異は生じない。 In the present embodiment, the engaging portion 7 and the engaged portion 8 are configured in a dovetail shape.
That is, for example, as shown in FIG. 1, the engaging portion 7 formed in the outer fitting end portion 4 has a configuration having an enlarged protruding portion 7 a that is wider toward the protruding tip side in the longitudinal sectional view of the first pile 1.
One engaged portion 8 is configured in a groove shape so that the enlarged projecting portion 7a can be inserted from the circumferential direction Y.
However, the difference in the shape of whether it is the enlarged projecting portion 7a or the groove portion 8b occurs because the engaging portion 7 and the engaged portion 8 are formed in only one place in the direction of the shaft cores Z1 and Z2. This is the case. In the case of the present embodiment shown in FIG. 1, the enlarged protrusion 7a and the groove 8b are formed at four locations along the directions of the axes Z1 and Z2, so that the enlarged protrusion 7a adjacent to the axis direction. Grooves are inevitably formed between them, and there is no difference between which is the enlarged protrusion 7a and which is the groove 8b.

第１杭１に対する第２杭２の連結は、以下の要領で行う。
図１および図２に示すごとく、前記第２杭２の挿入は、軸芯Ｚ１方向の係合部７の並びと、軸芯Ｚ２方向の被係合部８の並びとが、周方向Ｙにおいて異なる位置となる状態で行う。第２杭２の挿入は、例えば、内嵌端部６の先端部１０が外嵌端部４の基端部９に当接し、内嵌端部６の基端部９が外嵌端部４の先端部１０に当接するまで行う。
前記第２杭２が所定の深さまで挿入されると、互いに係合すべき係合部７と被係合部８とは、軸芯Ｚ１，Ｚ２方向において異なる部位に位置する。この状態が図２（ロ）である。この状態で第２杭２を軸芯Ｚ２周りに回転させれば、図２（ハ）のごとく前記係合部７と前記被係合部８とが係合し、第１杭１に対して第２杭２を連結することができる。
尚、当該第２杭２の挿入を容易にするためには、図１に示すごとく、前記内嵌端部６に係る先端部１０の外周部と、前記外嵌端部４に係る先端部１０の内周部とに、面取り部１３を設けておくのがよい。 The second pile 2 is connected to the first pile 1 in the following manner.
As shown in FIGS. 1 and 2, the second pile 2 is inserted in such a manner that the arrangement of the engaging portions 7 in the direction of the axis Z1 and the arrangement of the engaged portions 8 in the direction of the axis Z2 are in the circumferential direction Y. Perform in a different position. For example, the distal end 10 of the inner fitting end 6 abuts on the proximal end 9 of the outer fitting end 4, and the proximal end 9 of the inner fitting end 6 is inserted into the outer fitting end 4. This is carried out until it comes into contact with the distal end portion 10.
When the second pile 2 is inserted to a predetermined depth, the engaging portion 7 and the engaged portion 8 to be engaged with each other are located at different portions in the directions of the axes Z1 and Z2. This state is shown in FIG. If the second pile 2 is rotated around the axis Z2 in this state, the engaging portion 7 and the engaged portion 8 are engaged with each other as shown in FIG. The 2nd pile 2 can be connected.
In order to facilitate the insertion of the second pile 2, as shown in FIG. 1, the outer peripheral portion of the distal end portion 10 related to the inner fitting end portion 6 and the distal end portion 10 related to the outer fitting end portion 4. It is preferable to provide a chamfered portion 13 on the inner peripheral portion.

第２杭２の回転作業を円滑に行うためには、例えば、図３（イ）（ロ）に示すごとく、第２杭本体５の外周部であって基端部９の近傍に回転作業用の把手１４を取付けると便利である。当該把手１４は取り外し自在に構成する。そのためには、前記外周部にボルト穴１５を設けておき、端部に雄ねじ部を設けた把手１４を螺入させる構成にするとよい。
また、第２杭２の回転作業を確実に行うためには、例えば図３（イ）（ロ）に示すごとく、第１杭１に係る外嵌端部４の先端部１０の外周面１０ａと、第２杭２に係る第２杭本体５の外周面５ａであって基端部９の近傍に夫々合わせマーク１６を設けておくとよい。つまり、当該合わせマーク１６が一致するまで第２杭２を回転させれば、係合部７と被係合部８とが確実に係合する。 In order to smoothly rotate the second pile 2, for example, as shown in FIGS. 3 (a) and 3 (b), the outer periphery of the second pile body 5 and the vicinity of the base end portion 9 It is convenient to attach the handle 14. The handle 14 is configured to be removable. For this purpose, a bolt hole 15 is provided in the outer peripheral portion, and a handle 14 provided with a male screw portion at the end portion is preferably screwed.
Moreover, in order to perform the rotation operation | work of the 2nd pile 2 reliably, as shown, for example to FIG. 3 (A) (B), the outer peripheral surface 10a of the front-end | tip part 10 of the external fitting end part 4 which concerns on the 1st pile 1 and The alignment mark 16 may be provided in the vicinity of the base end portion 9 on the outer peripheral surface 5a of the second pile body 5 according to the second pile 2. That is, if the 2nd pile 2 is rotated until the said alignment mark 16 corresponds, the engaging part 7 and the to-be-engaged part 8 will engage reliably.

以上のごとく構成した係合部７と被係合部８とは、単に、前記第１杭１と前記第２杭２とが双方の軸芯Ｚ１，Ｚ２方向に沿って変位するのを阻止するに止まらず、前記外嵌端部４と前記内嵌端部６とを同軸芯状に嵌合させて、係合した前記係合部７と前記被係合部８とが前記軸芯Ｚ１，Ｚ２の径方向Ｘに離間するのを阻止するための離間阻止手段を構成する。
この結果、第１杭１と第２杭２との継手部に曲げ力が加わった場合、あるいは、引っ張り・圧縮力が加わった場合にも、図７に示すような前記外嵌端部４と前記内嵌端部６との離間が生じず、前記外嵌端部４および前記内嵌端部６の断面変形が抑制されて、強固な継手部を得ることができる。 The engaging portion 7 and the engaged portion 8 configured as described above simply prevent the first pile 1 and the second pile 2 from being displaced along the directions of both the axes Z1 and Z2. The engaging portion 7 and the engaged portion 8 engaged with each other by fitting the outer fitting end portion 4 and the inner fitting end portion 6 into a coaxial core shape are the shaft cores Z1 and Z1. A separation preventing means for preventing separation in the radial direction X of Z2 is configured.
As a result, even when a bending force is applied to the joint portion between the first pile 1 and the second pile 2, or when a tensile / compressive force is applied, the outer fitting end portion 4 as shown in FIG. Separation from the inner fitting end portion 6 does not occur, and cross-sectional deformation of the outer fitting end portion 4 and the inner fitting end portion 6 is suppressed, so that a strong joint portion can be obtained.

本発明のごとく、第２杭２を軸芯Ｚ２の周りに所定の角度だけ回転させる場合には、当該回転操作を行うことができるよう係合部７と被係合部８とを形成する結果、杭の連結が終了した状態で継手部にガタが存在する場合がある。このようなガタが存在すると、継手部の強度は低下する。
これを防止するために、本発明の杭の継手部構造では、図４に示すごとく、係合部７と被係合部８との接当面１７を、螺旋の一部を形成するよう軸芯Ｚ１，Ｚ２の周方向Ｙに対して斜めに形成してある。図４の場合には、個々の係合部７あるいは個々の被係合部８の上下面に逆の傾斜を設けてある。
本構成であれば、第２杭２を回転させる際に係合部７と被係合部８との間のガタを解消し、係合部７と被係合部８との当接力を高めて強固な継手部を得ることができる。
また、この場合には、第２杭２を回転させる際のストッパ機能が生じて、第２杭２を回転し過ぎることがなく、杭の連結作業を簡便なものにすることもできる。 As in the present invention, when the second pile 2 is rotated around the axis Z2 by a predetermined angle, the result is that the engaging portion 7 and the engaged portion 8 are formed so that the rotation operation can be performed. In some cases, looseness may exist in the joint in a state where the connection of the piles has been completed. When such backlash exists, the strength of the joint portion decreases.
In order to prevent this, in the joint structure of a pile according to the present invention, as shown in FIG. 4, the contact surface 17 between the engaging portion 7 and the engaged portion 8 is formed so as to form a part of a spiral. It is formed obliquely with respect to the circumferential direction Y of Z1 and Z2. In the case of FIG. 4, reverse slopes are provided on the upper and lower surfaces of the individual engaging portions 7 or the individual engaged portions 8.
If it is this structure, when rotating the 2nd pile 2, the rattling between the engaging part 7 and the to-be-engaged part 8 will be eliminated, and the contact force of the engaging part 7 and the to-be-engaged part 8 will be raised. And a strong joint part can be obtained.
Moreover, in this case, the stopper function at the time of rotating the 2nd pile 2 arises, the 2nd pile 2 is not rotated too much, and the connection operation | work of a pile can also be made simple.

（その他）
前記第１杭本体３及び前記第２杭本体５は、高強度で加工性に優れている等の理由から、通常、圧延鋼管・鋳造管等の鋼管で構成することができる。ただし、特にこれに限定されるわけではなく、コンクリート製の杭であってもよい。コンクリート製の杭の場合には、あらかじめ形成した前記外嵌端部４あるいは前記内嵌端部６を杭の端部に埋設して用いる。 (Other)
The said 1st pile main body 3 and the said 2nd pile main body 5 can be normally comprised with steel pipes, such as a rolled steel pipe and a cast pipe, for reasons, such as being high intensity | strength and excellent in workability. However, it is not particularly limited to this, and may be a concrete pile. In the case of a concrete pile, the outer fitting end 4 or the inner fitting end 6 formed in advance is embedded in the end of the pile.

（効果）
本発明の杭の継手部構造は、係合した係合部７と被係合部８とを第１杭１の径方向Ｘに離間させないようにするために、係合部７と被係合部８とに離間阻止手段を設けてある。 この結果、第１杭１と第２杭２との継手部に曲げ力が加わった場合、あるいは、引っ張り・圧縮力が加わった場合にも、前記外嵌端部４および前記内嵌端部６との断面変形が抑制されて外嵌端部４等が高い曲げ耐力を発揮し、強固な継手部を構成することができる。 また、第２杭２の連結に際しては、第２杭２を自身の軸芯Ｚ２周りに所定の角度のみ回転させるだけでよいから、杭の連結作業が非常に簡便なものとなる。
さらに、連結作業の終了は、例えば第２杭２の回転角度をもって判断できるから、継手部の品質管理が容易となる。
この他、本発明の杭の継手部構造であれば、天候によって作業の進行が妨げられることも少ないから、工期の短縮、コストダウンが可能である等の利点も得られる。 (effect)
The joint part structure of the pile of the present invention is such that the engaged part 7 and the engaged part 8 are not engaged with the engaging part 7 in order to prevent the engaged part 7 and the engaged part 8 from being separated in the radial direction X of the first pile 1. The portion 8 is provided with a separation preventing means. As a result, even when a bending force is applied to the joint portion between the first pile 1 and the second pile 2 or when a tensile / compressive force is applied, the outer fitting end 4 and the inner fitting end 6 And the outer fitting end portion 4 and the like exhibit a high bending strength, and a strong joint portion can be configured. Further, when the second pile 2 is connected, it is only necessary to rotate the second pile 2 around the axis Z2 of the second pile 2 by a predetermined angle, so that the connection work of the pile becomes very simple.
Furthermore, since the end of the connection work can be determined from the rotation angle of the second pile 2, for example, quality control of the joint portion is facilitated.
In addition, since the pile joint structure of the present invention is less likely to prevent work from proceeding due to the weather, advantages such as shortening the construction period and reducing costs are also obtained.

〔別実施形態〕
〈１〉 上記実施形態では、前記係合部７と前記被係合部８とをアリ溝状に構成したが、当該構成に限られるものではない。例えば、図５に示すごとく、杭の縦断面視における前記係合部７と前記被係合部８との断面形状を略Ｔ字状に形成して、離間阻止手段を構成するものであってもよい。
本構成の場合にも、外嵌端部４および内嵌端部６の断面形状の変形を阻止して、曲げ耐力等に優れた杭の継手部を得ることができる。 [Another embodiment]
<1> In the above embodiment, the engaging portion 7 and the engaged portion 8 are configured in a dovetail shape, but the configuration is not limited thereto. For example, as shown in FIG. 5, the cross-sectional shape of the engaging portion 7 and the engaged portion 8 in a vertical cross-sectional view of a pile is formed in a substantially T shape to constitute a separation preventing means. Also good.
Also in the case of this configuration, it is possible to obtain a joint portion of a pile excellent in bending strength and the like by preventing the deformation of the cross-sectional shapes of the outer fitting end portion 4 and the inner fitting end portion 6.

〈２〉 上記実施形態では、係合部７と被係合部８とが径方向Ｘに離間しないように係合部７および被係合部８自身に離間阻止手段を形成した。しかし、離間阻止手段は、以下のごとく構成することもできる。
即ち、図６（イ）（ロ）に示すごとく、外嵌端部４および内嵌端部６の夫々の先端部１０に、軸芯Ｚ１，Ｚ２方向に対して略垂直な端面２０と軸芯Ｚ１，Ｚ２方向に対して略平行な側面２１とを備えた環状の先端凸部１８を設け、外嵌端部４および内嵌端部６の夫々の基端部９に、軸芯Ｚ１，Ｚ２方向に対して略垂直な端面２２と軸芯Ｚ１，Ｚ２方向に対して略平行な側面２３とを備えた基端溝部１９を設ける。
外嵌端部４の先端凸部１８は、先端部１０の内周側に設けてあり、内嵌端部６の先端凸部１８は先端部１０の外周側に設けてある。
一方、内嵌端部６の基端部９と外嵌端部４の基端部９とには、全周に沿って基端溝部１９を形成してある。双方の基端溝部１９は、軸芯Ｚ１，Ｚ２方向に突出している。
本構成であれば、第２杭２を第１杭１に挿入した場合、あるいは、第２杭２と第１杭１との連結が終了した状態では、図６（ロ）に示すごとく、先端凸部１８と基端溝部１９とが同軸芯状に係合する。特に、先端凸部１８と基端溝部１９とは、軸芯Ｚ１，Ｚ２の径方向Ｘに当接する。
つまり、本構成であれば、継手部に曲げ力が加わった場合、或いは、軸芯方向に沿った過度の圧縮力・引張力が加わった場合に、先端部１０と基端部９とが離間するのを防止する。例えば、継手部に曲げ力が加わると、外嵌端部４および内嵌端部６は図７（イ）のように変形して係合部７と被係合部８との係合度合いが弱まり、第２杭２が抜け出すおそれが生じるし、第２杭２の抜け出しが防止できても、外嵌端部４あるいは内嵌端部６が変形するおそれがあり、その場合には、継手部の耐力が低下する。しかし、本構成のごとく、先端凸部１８と基端溝部１９とを設けておけば、継手部に曲げ力が加わった際の先端部１０と基端部９との離間を抑制できる。特に、肉厚の薄くなりがちな内嵌端部６および外嵌端部４の先端部１０の断面形状が円断面に維持されて、高い耐力を備えた継手部を得ることができる。
図６（イ）（ロ）では、杭の縦断面視における前記先端凸部１８および前記基端溝部１９の断面形状を略矩形状としたが、当該構成に限られず、断面形状を例えば、三角形状等に構成してもよい。要するに、前記先端凸部１８と前記基端溝部１９との係合によって、前記先端部１０および前記基端部９の断面形状の変形を抑制できるものであれば何れの構成であってもよい。
さらに、本別実施形態では、前記係合部７と被係合部８とを略矩形状の断面に形成したが本構成に限られるものではない。即ち、図示は省略するが、前記先端凸部１８および前記基端溝部１９を設けつつ、前記係合部７と前記被係合部８とを、図１・図２に示すような拡大突出部を有する形状に構成してもよい。この場合には、前記外嵌端部４と前記内嵌端部６との係合程度をさらに高めることができる。 <2> In the above embodiment, the separation preventing means is formed in the engagement portion 7 and the engaged portion 8 itself so that the engagement portion 7 and the engaged portion 8 are not separated in the radial direction X. However, the separation preventing means can be configured as follows.
That is, as shown in FIGS. 6 (a) and 6 (b), an end face 20 and a shaft core that are substantially perpendicular to the directions of the shaft cores Z1 and Z2 are provided at the front end portions 10 of the outer fitting end portion 4 and the inner fitting end portion 6, respectively. An annular tip convex portion 18 having a side surface 21 substantially parallel to the Z1 and Z2 directions is provided, and the shaft cores Z1 and Z2 are provided at the base end portions 9 of the outer fitting end portion 4 and the inner fitting end portion 6 , respectively. A proximal groove portion 19 having an end face 22 that is substantially perpendicular to the direction and a side face 23 that is substantially parallel to the directions of the axes Z1 and Z2 is provided.
The tip convex portion 18 of the outer fitting end 4 is provided on the inner peripheral side of the tip portion 10, and the tip convex portion 18 of the inner fitting end portion 6 is provided on the outer peripheral side of the tip portion 10.
On the other hand, a proximal end groove portion 19 is formed along the entire circumference of the proximal end portion 9 of the inner fitting end portion 6 and the proximal end portion 9 of the outer fitting end portion 4. Both base end groove portions 19 protrude in the directions of the axial centers Z1 and Z2.
If this configuration, if the second pile 2 is inserted into the first pile 1, or a second pile 2 in a state in which the connection is completed between the first pile 1, as shown in FIG. 6 (b), the tip The convex part 18 and the base end groove part 19 engage in a coaxial core shape. In particular, the tip convex portion 18 and the base end groove portion 19 abut on the radial direction X of the shaft cores Z1 and Z2.
In other words, with this configuration, the distal end portion 10 and the proximal end portion 9 are separated when a bending force is applied to the joint portion or when an excessive compressive force / tensile force is applied along the axial direction. To prevent it. For example, when a bending force is applied to the joint portion, the outer fitting end portion 4 and the inner fitting end portion 6 are deformed as shown in FIG. 7A, and the degree of engagement between the engaging portion 7 and the engaged portion 8 is increased. Even if it can weaken and the 2nd pile 2 may come out, and even if it can prevent the 2nd pile 2 from coming off, there is a possibility that the outer fitting end 4 or the inner fitting end 6 may be deformed. The proof stress is reduced. However, as in this configuration, if provided a tip protrusion 18 and the base end groove 19, it can suppress the separation of the tip 10 and a proximal end 9 when the bending force is applied to the joint portion. In particular, the cross-sectional shapes of the inner fitting end portion 6 and the outer fitting end portion 4, which tend to be thin, are maintained in a circular cross section, and a joint portion having high yield strength can be obtained.
6 (a) and 6 (b), the cross-sectional shapes of the tip convex portion 18 and the base end groove portion 19 in the longitudinal cross-sectional view of the pile are substantially rectangular, but the cross-sectional shape is not limited to this configuration, and the cross-sectional shape is, for example, a triangle You may comprise in a shape etc. In short, the by engagement of the leading protrusion 18 and the proximal groove 19 can be any configuration as long as the deformation of the cross-sectional shape of the tip 10 and the proximal end portion 9 can be suppressed.
Furthermore, in this other embodiment, although the said engaging part 7 and the to-be-engaged part 8 were formed in the substantially rectangular cross section, it is not restricted to this structure. That is, although not shown, the while providing the leading protrusion 18 and the proximal groove 19, the engagement between engaging portion 7 and the engaged portion 8, enlarged projecting portion as shown in FIGS. 1 and 2 You may comprise in the shape which has. In this case, the degree of engagement between the outer fitting end portion 4 and the inner fitting end portion 6 can be further increased.

〈３〉
上記実施形態では、係合部７および被係合部８を軸芯Ｚ１，Ｚ２の周方向Ｙに断続的に配置した例を示した。しかし、上記に係合部７および被係合部８を単にネジ状に構成してもよい。ただし、その場合においても、前記係合部７などの断面形状は、例えばアリ溝形状とし、前記係合部７と前記被係合部８とが前記軸芯の径方向Ｘに離間しない構成とする。
本構成の場合、上記実施形態に比較して、係合部７等の製作の手間および第２杭２の螺合作業の手間が増大するものの、継手部の全周に亘って係合部７と被係合部８とが係合可能であるから、より強固な杭の継手部を得ることができる。 <3>
In the said embodiment, the example which arrange | positioned the engaging part 7 and the to-be-engaged part 8 intermittently in the circumferential direction Y of axial center Z1, Z2 was shown. However, the engaging portion 7 and the engaged portion 8 may be simply formed in a screw shape as described above. However, even in that case, the cross-sectional shape of the engaging portion 7 or the like is, for example, a dovetail shape, and the engaging portion 7 and the engaged portion 8 are not separated in the radial direction X of the shaft core. To do.
In the case of this structure, compared with the said embodiment, although the effort of manufacture of the engaging part 7 grade | etc., And the effort of the screwing operation | work of the 2nd pile 2 increase, the engaging part 7 over the perimeter of a joint part. And the engaged portion 8 can be engaged with each other, so that a stronger joint portion of the pile can be obtained.

尚、上記特許請求の範囲の記載中、図面を参照し、図面との対照を便利にするために符号を記すが、当該記入により本発明が添付図面の構成に限定されるものではない。   In the description of the appended claims, reference is made to the drawings and reference numerals are used for convenience of comparison with the drawings.

本発明に係る杭の継手部構造を示す説明図Explanatory drawing which shows the joint part structure of the pile which concerns on this invention 杭の連結過程を示す縦断面図Longitudinal section showing the connection process of piles 杭の連結過程を示す横断面図Cross section showing the connection process of piles 係合部および被係合部の傾斜状態を示す説明図Explanatory drawing which shows the inclination state of an engaging part and an engaged part 別実施形態に係る杭の継手部構造を示す説明図Explanatory drawing which shows the joint part structure of the pile which concerns on another embodiment 別実施形態に係る杭の連結過程を示す縦断面図The longitudinal cross-sectional view which shows the connection process of the pile which concerns on another embodiment 従来技術に係る杭の継手部構造を示す縦断面図Longitudinal sectional view showing the joint structure of a pile according to the prior art

符号の説明Explanation of symbols

１ 第１杭
２ 第２杭
４ 外嵌端部
６ 内嵌端部
９ 外嵌端部・内嵌端部の基端部
１０ 外嵌端部・内嵌端部の先端部
１８ 先端凸部
１９ 基端溝部
２０ 軸芯方向に対して略垂直な端面
２１ 軸芯方向に対して略平行な側面
２２ 軸芯方向に対して略垂直な端面
２３ 軸芯方向に対して略平行な側面 DESCRIPTION OF SYMBOLS 1 1st pile 2 2nd pile 4 Outer fitting end part 6 Inner fitting end part
9 Outer fitting end portion / base end portion of inner fitting end portion 10 Outer fitting end portion / tip end portion of inner fitting end portion
1 8 leading protrusion 19 proximal groove
20 End face substantially perpendicular to the axial direction
21 Side surface substantially parallel to the axial direction
22 End face substantially perpendicular to the axial direction
23 Side surface substantially parallel to the axial direction

Claims (5)

互いに嵌合自在な一対の外嵌端部と内嵌端部とを軸芯方向に隣接する第１杭と第２杭とに各別に形成し、前記外嵌端部と前記内嵌端部とを嵌合させた状態で、前記第１杭と前記第２杭とを連結してある杭の継手部構造であって、
前記外嵌端部と前記内嵌端部とを嵌合させた状態で、その外嵌端部と内嵌端部とが前記第１杭あるいは前記第２杭の径方向に離間するのを阻止するための離間阻止手段を、前記外嵌端部の先端部と前記内嵌端部の基端部に設けてある杭の継手部構造。 A pair of outer fitting end portions and inner fitting end portions that can be fitted to each other are separately formed in a first pile and a second pile adjacent in the axial direction, and the outer fitting end portion and the inner fitting end portion, In a state where the first pile and the second pile are connected with each other, the joint structure of the pile,
In the state where the outer fitting end and the inner fitting end are fitted, the outer fitting end and the inner fitting end are prevented from being separated in the radial direction of the first pile or the second pile. The joint part structure of the pile in which the separation | spacing prevention means for doing is provided in the front-end | tip part of the said external fitting end part, and the base end part of the said internal fitting end part. 互いに嵌合自在な一対の外嵌端部と内嵌端部とを軸芯方向に隣接する第１杭と第２杭とに各別に形成し、前記外嵌端部と前記内嵌端部とを嵌合させた状態で、前記第１杭と前記第２杭とを連結してある杭の継手部構造であって、
前記外嵌端部と前記内嵌端部とを嵌合させた状態で、その外嵌端部と内嵌端部とが前記第１杭あるいは前記第２杭の径方向に離間するのを阻止するための離間阻止手段を、前記内嵌端部の先端部と前記外嵌端部の基端部に設けてある杭の継手部構造。 A pair of outer fitting end portions and inner fitting end portions that can be fitted to each other are separately formed in a first pile and a second pile adjacent in the axial direction, and the outer fitting end portion and the inner fitting end portion, In a state where the first pile and the second pile are connected with each other, the joint structure of the pile,
In the state where the outer fitting end and the inner fitting end are fitted, the outer fitting end and the inner fitting end are prevented from being separated in the radial direction of the first pile or the second pile. The joint part structure of the pile in which the separation | spacing prevention means for doing is provided in the front-end | tip part of the said internal fitting end part, and the base end part of the said external fitting end part. 前記離間阻止手段は、前記軸芯方向から互いに嵌合自在な先端凸部と基端溝部とからなる請求項１又は２記載の杭の継手部構造。   The pile joint structure according to claim 1 or 2, wherein the separation preventing means includes a tip convex portion and a proximal groove portion that can be fitted to each other in the axial direction. 前記先端部に前記軸芯方向に対して略垂直な端面を備えるとともに、前記基端部に前記軸芯方向に対して略垂直な端面を備えて、
前記凸部と前記溝部との嵌合によって前記端面どうしが上下に対向するように構成してある請求項３記載の杭の継手部構造。 The end portion is provided with an end surface substantially perpendicular to the axial direction, and the proximal end portion is provided with an end surface substantially perpendicular to the axial direction,
The joint part structure of a pile according to claim 3, wherein the end faces are vertically opposed to each other by fitting the convex part and the groove part. 前記凸部と前記溝部との夫々が前記軸芯方向に対して略平行な側面を備え、
前記凸部と前記溝部との嵌合によって前記側面どうしが杭径方向に対向するように構成してある請求項３又は４記載の杭の継手部構造。 Each of the convex part and the groove part includes a side surface substantially parallel to the axial direction,
The pile joint structure according to claim 3 or 4, wherein the side surfaces are opposed to each other in the pile radial direction by fitting the convex portion and the groove portion.
JP2005178354A 2005-06-17 2005-06-17 Pile joint structure Expired - Lifetime JP3877746B2 (en)

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