JP2010127029A - Structure for connecting pile body of steel pipe pile - Google Patents

Structure for connecting pile body of steel pipe pile Download PDF

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JP2010127029A
JP2010127029A JP2008304143A JP2008304143A JP2010127029A JP 2010127029 A JP2010127029 A JP 2010127029A JP 2008304143 A JP2008304143 A JP 2008304143A JP 2008304143 A JP2008304143 A JP 2008304143A JP 2010127029 A JP2010127029 A JP 2010127029A
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nut
pile
pile body
connecting member
bolt insertion
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JP4944086B2 (en
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Toshiya Oniki
俊也 鬼木
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Nippon Steel Trading Corp
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Sumikin Bussan Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a structure for connecting a pile body of a steel pipe pile, which enables pile connecting operations to be simply and easily performed on a construction site without being affected by the weather such as rainy weather. <P>SOLUTION: When a lower end of the upper pile body 1 is connected to an upper end of the lower pile body 1, a cylindrical connecting member N, the lower half portion of which is internally suitable for the upper end of the lower pile body 1 and the upper half portion of which is internally suitable for the lower end of upper pile body 1, is provided; bolt insertion holes 7 are provided at regular spacings in a circumferential direction at the upper end of the lower pile body 1 and the lower end of the upper pile body 1; bolt insertion holes 8 are provided in positions corresponding to the pile body-side bolt insertion holes 7 when the connecting member N is internally suitable for the connecting end of the pile body 1, on the upper-end and lower-end sides of the connecting member N, respectively; and a nut holding portion 9, which holds a nut 10, inserted from above the connecting member N, in an unrotatable and longitudinally-immovable manner in a position to axially face each connecting member-side bolt insertion hole 8, is provided on the side of the inner peripheral surface of the connecting member N. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

本発明は、鋼管杭において下方の杭本体の上端部に上方の杭本体の下端部を連結するための杭本体連結構造に関する。   The present invention relates to a pile body connection structure for connecting a lower end portion of an upper pile body to an upper end portion of a lower pile body in a steel pipe pile.

鋼管杭は、鉛直及び水平方向にきわめて大きな耐力を有し、杭先端側の支持層に十分に力が伝達され、大きな支持力が得られ、また軽量で破損の心配がなく、運搬や取り扱いが容易なことから、近年その需要は著しく増大している。   Steel pipe piles have extremely high proof stress in the vertical and horizontal directions, and sufficient force is transmitted to the support layer on the tip side of the pile to obtain a large support force. Due to its ease, its demand has increased significantly in recent years.

建造物等の基礎に使用される鋼管杭としては、杭本体下端部に取り付けた掘削ヘッドに螺旋翼を設けた拡底型、掘削ヘッドと共に杭本体の中間所要部に螺旋翼を設けた多翼型、また杭本体の下端部に掘削ヘッドのみ取り付けたストレート型の3種類の鋼管杭が一般に知られているが、その何れの鋼管杭も、杭打ち機械による杭長さの制約、施工現場での置き場スペースによる制約、運送時の長さの制約から、最大長さは6〜8mとされ、これらを越える長さの杭については、掘削ヘッドをもたない杭本体のみからなる所定長さの杭を地盤に打ち込みながら逐次継ぎ足して使用されるようになっている。   Steel pipe piles used for the foundations of buildings, etc., are bottom-up types with spiral wings provided on the excavation head attached to the lower end of the pile body, and multi-blade types with spiral wings provided in the intermediate required part of the pile body together with the excavation head In addition, three types of straight steel pipe piles with only a drilling head attached to the lower end of the pile body are generally known, but any of these steel pipe piles is limited in pile length by the pile driving machine, The maximum length is 6 to 8m due to restrictions due to the storage space and the length during transportation. For piles with a length exceeding this, a pile with a predetermined length consisting only of the pile body without the excavation head It is designed to be used with successive additions while driving into the ground.

軟弱地盤での杭打ち機械による鋼管杭の打ち込み作業においては、杭先端部が支持層に達するまで所要本数の杭を逐次継ぎ足してゆく、つまり先に打ち込んだ杭の上端部に後続の杭の下端部を逐次連結してゆくわけであるが、この連結にあたり、従来では、先行杭の上端部に後続杭の下端部を溶接によって連結していた。   When driving steel pipe piles with pile driving machines in soft ground, the required number of piles are added successively until the pile tip reaches the support layer. In this connection, conventionally, the lower end of the subsequent pile is connected to the upper end of the preceding pile by welding.

上記のように従来の鋼管杭の継ぎ足し作業は、先行する杭本体の上端部に後続の杭本体の下端部を溶接によって連結していることから、溶接用の電源や発電機等が必要となってコストアップの要因となり、また雨天時には感電等の恐れがあるため作業が行えず、更に溶接にはある程度熟練した溶接技術者が必要であるためコストが高くつく、と言うような問題があった。   As described above, the conventional steel pipe pile addition work involves connecting the lower end portion of the subsequent pile body to the upper end portion of the preceding pile body by welding, so that a welding power source, generator, etc. are required. In addition, there is a problem that the work cannot be performed due to the risk of electric shock when it rains, and the cost is high because a welding engineer who has some skill is required for welding. .

本発明は、上記の事情に鑑み、施工現場で杭の連結作業を簡単容易に行うことができ、また雨天等の天候に左右されることなく作業が行うことができる鋼管杭の杭本体連結構造を提供することを目的とする。尚、本発明に係る鋼管杭の杭本体連結構造は、杭先端部が支持層に達するまで所定長さの杭を所要本数逐次継ぎ足してゆく場合の杭本体どうしの連結構造の他に、鋼管杭を製造するにあたり、1本の鋼管杭の杭本体を複数に分割して、その分割体どうしを連結する場合の連結構造も含むものとする。   In view of the above circumstances, the present invention is a steel pipe pile main body connection structure that can easily perform pile connection work at a construction site and that can be performed without being affected by weather such as rainy weather. The purpose is to provide. In addition, the pile main body connection structure of steel pipe piles according to the present invention includes a pipe pipe pile connection structure in addition to a connection structure between pile main bodies when a predetermined number of piles are successively added until the pile tip reaches the support layer. In manufacturing, the pile structure of one steel pipe pile shall be divided | segmented into plurality, and the connection structure in the case of connecting the division bodies shall also be included.

上記課題を解決するための手段を、後述する実施形態の参照符号を付して説明すると、請求項1に係る発明の鋼管杭の杭本体連結構造は、下方の杭本体1の上端部に上方の杭本体1の下端部を連結するにあたり、下半部が下方の杭本体1上端部に内嵌合され且つ上半部が上方の杭本体1下端部に内嵌合される円筒状の連結部材Nを設け、下方の杭本体1の上端部及び上方の杭本体1の下端部には周方向一定間隔おきにボルト挿通孔7を設け、連結部材Nの上端部側及び下端部側には、連結部材Nを杭本体1の連結端部に内嵌合した時に杭本体側ボルト挿通孔7と合致する位置にボルト挿通孔8を設けると共に、連結部材Nの内周面側には、各連結部材側ボルト挿通孔8と軸方向に対向する位置でナット10を回転不能にして且つ前後移動不能に保持するナット保持部9を設けておいて、連結部材Nの下半部を下方の杭本体上端部に内嵌合して、ボルト12を杭本体側ボルト挿通孔7から連結部材側ボルト挿通孔8に挿通してナット保持部9内に保持されたナット10に螺合することにより、連結部材Nを下方の杭本体上端部に固定し、この連結部材Nの上半部を上方の杭本体下端部に内嵌合して、ボルト12を杭本体側ボルト挿通孔7から連結部材側ボルト挿通孔8に挿通してナット保持部9内に保持されたナット10に螺合することにより、連結部材Nを上方の杭本体下端部に固定して、両杭本体1,1を一体的に連結してなることを特徴とする。   Means for solving the above problems will be described with reference numerals of the embodiments described later. The pile main body connection structure of the steel pipe pile according to the first aspect of the present invention is arranged above the upper end portion of the lower pile main body 1. When connecting the lower end of the pile body 1, a cylindrical connection in which the lower half is internally fitted to the upper end of the lower pile body 1 and the upper half is internally fitted to the lower end of the upper pile body 1 The member N is provided, the upper end portion of the lower pile body 1 and the lower end portion of the upper pile body 1 are provided with bolt insertion holes 7 at regular intervals in the circumferential direction, and the upper end portion side and the lower end portion side of the connecting member N are provided. In addition, a bolt insertion hole 8 is provided at a position that matches the pile main body side bolt insertion hole 7 when the connection member N is internally fitted to the connection end portion of the pile main body 1. The nut 10 cannot be rotated at the position facing the connecting member side bolt insertion hole 8 in the axial direction and cannot be moved back and forth. The nut holding part 9 to hold | maintain is provided, the lower half part of the connection member N is internally fitted in the lower pile main body upper end part, and the volt | bolt 12 is connected from the pile main body side bolt insertion hole 7 to the connection member side bolt insertion hole. 8 and screwed into the nut 10 held in the nut holding portion 9 to fix the connecting member N to the upper end of the lower pile body, and the upper half of the connecting member N is connected to the upper pile body. The inner end of the bolt 12 is inserted into the lower end portion of the bolt 12 from the bolt body side bolt insertion hole 7 to the connecting member side bolt insertion hole 8 and screwed into the nut 10 held in the nut holding portion 9. The member N is fixed to the lower end of the upper pile body, and the pile bodies 1 and 1 are integrally connected.

請求項2は、請求項1に記載の鋼管杭の杭本体連結構造において、前記各ナット保持部9は、連結部材Nの内周面に、ボルト挿通孔8を中心として左右対称位置に突設された両側一対のアーム壁11,11からなり、各アーム壁11は、縦壁部aと、縦壁部aの下端から内向きに突出するナット受け壁部bと、縦壁部aの前端から内向きに突出するナット抜け止め壁部cとからなるもので、ナット10は連結部材Nの上方よりこのナット保持部9に挿入されるようになっていることを特徴とする。   Claim 2 is the pile main body connecting structure of steel pipe piles according to claim 1, wherein each of the nut holding portions 9 protrudes from the inner peripheral surface of the connecting member N at a bilaterally symmetrical position around the bolt insertion hole 8. The arm walls 11 are formed of a pair of arm walls 11 and 11 formed on both sides. Each arm wall 11 includes a vertical wall portion a, a nut receiving wall portion b projecting inwardly from a lower end of the vertical wall portion a, and a front end of the vertical wall portion a. And a nut retaining wall c projecting inward from the nut 10. The nut 10 is inserted into the nut holding portion 9 from above the connecting member N.

請求項3は、請求項1又は2に記載の鋼管杭の杭本体連結構造において、前記連結部材Nの上端部及び下端部の夫々内周縁に沿って補強用の内向きフランジ部13を突設し、連結部材内周面の上端部側ナット保持部9と下端部側ナット保持部9とは互いに上下逆方向に設け、上端部側フランジ部13には各上端部側ナット保持部9にナット10を挿入するためのナット挿入口14を、また下端部側フランジ部13には各下端部側ナット保持部9にナット10を挿入するためのナット挿入口14を夫々設けてなることを特徴とする。   Claim 3 is a pile body connecting structure of steel pipe piles according to claim 1 or 2, wherein an inward flange portion 13 for reinforcement is projected along the inner peripheral edge of each of the upper end portion and the lower end portion of the connecting member N. The upper end side nut holding portion 9 and the lower end side nut holding portion 9 on the inner peripheral surface of the connecting member are provided in the opposite directions, and the upper end side flange holding portion 13 has a nut on each upper end side nut holding portion 9. And a nut insertion port 14 for inserting the nut 10 in each lower end side nut holding portion 9 is provided in the lower end side flange portion 13. To do.

請求項4に係る発明の鋼管杭の杭本体連結構造は、下方の杭本体1の上端部に上方の杭本体1の下端部を連結するにあたり、杭本体1の外径と同じ外径を有する円筒状本体20の上下端部に、外径が杭本体1の内径より径小で上方の杭本体1の下端部及び下方の杭本体1の上端部が夫々外嵌合する上下基筒部21,22を形成してなる円筒状の連結部材Mを設け、下方の杭本体1の上端部及び上方の杭本体1の下端部には周方向一定間隔おきにボルト挿通孔7を設け、連結部材Mの上下各基筒部21,22には、基筒部21,22に杭本体1の連結端部が外嵌合した時に杭本体側ボルト挿通孔7と合致する位置にボルト挿通孔8を設けると共に、各基筒部21,22の内周面側に、各基筒部側ボルト挿通孔8と軸方向に対向する位置で連結部材Mの上方より挿入されるナット10を回転不能にして且つ前後移動不能に保持するナット保持部9を設けておいて、下基筒部22を下方の杭本体1の上端部に内嵌合して、ボルト12を杭本体側ボルト挿通孔7から基筒部側ボルト挿通孔8に挿通してナット保持部9内に保持されたナット10に螺合することにより、連結部材Mを下方の杭本体上端部に固定し、上基筒部21を上方の杭本体下端部に内嵌合して、ボルト12を杭本体側ボルト挿通孔7から基筒部側ボルト挿通孔8に挿通してナット保持部9内に保持されたナット10に螺合することにより、上基筒部21を上方の杭本体下端部に固定して、両杭本体1,1を一体的に連結してなることを特徴とする。   The pile main body connection structure of the steel pipe pile of the invention according to claim 4 has the same outer diameter as the outer diameter of the pile main body 1 when connecting the lower end of the upper pile main body 1 to the upper end of the lower pile main body 1. The upper and lower base cylinder parts 21 which the outer diameter is smaller than the inner diameter of the pile main body 1, and the lower end part of the upper pile main body 1 and the upper end part of the lower pile main body 1 are fitted to the upper and lower ends of the cylindrical main body 20, respectively. , 22 is provided, and the bolt insertion holes 7 are provided at regular intervals in the circumferential direction at the upper end portion of the lower pile body 1 and the lower end portion of the upper pile body 1. Bolt insertion holes 8 are formed in the upper and lower base tube portions 21 and 22 of the M at positions where the connecting end portions of the pile body 1 are fitted to the base tube portions 21 and 22 so as to coincide with the bolt body side bolt insertion holes 7. The connecting portion is provided on the inner peripheral surface side of each base tube portion 21, 22 at a position facing each base tube portion side bolt insertion hole 8 in the axial direction. A nut holding part 9 is provided to make the nut 10 inserted from above M non-rotatable and non-movable back and forth, and the lower base cylinder part 22 is internally fitted to the upper end part of the lower pile body 1. The bolt 12 is inserted into the base cylinder side bolt insertion hole 8 from the pile body side bolt insertion hole 7 and screwed into the nut 10 held in the nut holding portion 9, thereby connecting the connecting member M to the lower pile. The upper base cylinder 21 is fixed to the upper end of the main body, the upper base cylinder 21 is fitted into the lower end of the upper pile main body, and the bolt 12 is inserted from the pile main body side bolt insertion hole 7 to the base cylinder side bolt insertion hole 8. By screwing onto the nut 10 held in the holding part 9, the upper base cylinder part 21 is fixed to the upper lower end of the pile body, and the two pile bodies 1 and 1 are integrally connected. Features.

請求項5は、請求項3に記載の鋼管杭の杭本体連結構造において、前記連結部材Mの円筒状本体20には螺旋翼4を突設してなることを特徴とする。   A fifth aspect of the present invention is the steel pipe pile main body connecting structure according to the third aspect, wherein the cylindrical body 20 of the connecting member M is provided with a spiral blade 4 protruding therefrom.

請求項6は、請求項4又は5に記載の鋼管杭の杭本体連結構造において、前記各ナット保持部9は、連結部材Mの内周面に、ボルト挿通孔8を中心として左右対称位置に突設された両側一対のアーム壁11,11からなり、各アーム壁11は、縦壁部aと、縦壁部aの下端から内向きに突出するナット受け壁部bと、縦壁部aの前端から内向きに突出するナット抜け止め壁部cとからなるもので、ナットは連結部材Mの上方よりこのナット保持部9に挿入されるようになっていることを特徴とする。   Claim 6 is the pile main body connecting structure for steel pipe piles according to claim 4 or 5, wherein each nut holding portion 9 is located on the inner peripheral surface of the connecting member M at a symmetrical position around the bolt insertion hole 8. Each arm wall 11 includes a vertical wall portion a, a nut receiving wall portion b protruding inward from the lower end of the vertical wall portion a, and a vertical wall portion a. And a nut retaining wall portion c projecting inward from the front end of the nut. The nut is inserted into the nut holding portion 9 from above the connecting member M.

請求項7は、請求項4〜6に記載の鋼管杭の杭本体連結構造において、前記上基筒部21の上端部内周縁に沿って補強用の内向きフランジ部13を突設すると共に、下基筒部22の下端部内周縁に沿って補強用の内向きフランジ部13を突設し、上基筒部側ナット保持部9と下基筒部側ナット保持部9とは互いに上下逆方向に設け、上基筒部側フランジ部13には各上基筒部側ナット保持部9にナット10を挿入するためのナット挿入口14を、また下基筒部側フランジ部13には各下基筒部側ナット保持部9にナット10を挿入するためのナット挿入口14を夫々設けてなることを特徴とする。   In the pile main body connection structure of the steel pipe pile according to claims 4 to 6, the inward flange portion 13 for reinforcement is projected along the inner peripheral edge of the upper end portion of the upper base tube portion 21 and A reinforcing inward flange portion 13 is projected along the inner peripheral edge of the lower end portion of the base tube portion 22 so that the upper base tube portion side nut holding portion 9 and the lower base tube portion side nut holding portion 9 are opposite to each other in the vertical direction. The upper base tube portion side flange portion 13 is provided with a nut insertion port 14 for inserting the nut 10 into each upper base tube portion side nut holding portion 9, and the lower base tube portion side flange portion 13 is provided with each lower base portion. A nut insertion port 14 for inserting a nut 10 is provided in each of the tube side nut holding portions 9.

請求項8は、請求項2又は6に記載の鋼管杭の杭本体連結構造において、各ナット保持部9の各アーム壁11を形成するナット受け壁部bは、その上面が水平面に対し約30°の傾斜面に形成されていることを特徴とする。   Claim 8 is a pile connection structure of steel pipe piles according to claim 2 or 6, wherein the nut receiving wall portion b forming each arm wall 11 of each nut holding portion 9 has an upper surface of about 30 with respect to a horizontal plane. It is formed on an inclined surface of °.

請求項9は、請求項1〜8の何れかに記載の鋼管杭において、前記連結部材N,Mは鋳鋼又は鋳鉄からなる一体成形鋳造物であることを特徴とする。   A ninth aspect of the present invention is the steel pipe pile according to any one of the first to eighth aspects, wherein the connecting members N and M are integrally formed castings made of cast steel or cast iron.

上記解決手段による発明の効果を、後述する実施形態の参照符号を付して説明すると、請求項1に係る発明の鋼管杭の杭本体連結構造によれば、例えば、杭打ち工事において所定長さの鋼管杭を逐次継ぎ足す場合に、連結部材Nの下半部を下方の鋼管杭Kの杭本体1の上端部に内嵌合して杭本体側ボルト挿通孔7から連結部材側ボルト挿通孔8にボルト12を挿通し、ナット保持部9内のナット10にねじ込むことにより、連結部材Nの下半部を下方の鋼管杭Kの杭本体1の上端部に固定した後、連結部材Nの上半部に上方の鋼管杭Kの杭本体1の下端部を外嵌合し、上方の鋼管杭Kの杭本体下端部のボルト挿通孔7から連結部材側ボルト挿通孔8に挿通し、ナット保持部9内に保持されているナット10にねじ込むことにより上方の鋼管杭Kの杭本体1の下端部を連結部材Nの上半部に連結して、両鋼管杭K,Kの杭本体1,1どうしをする連結するから、従来の溶接による連結作業のように溶接用の電源や発電機などの設備が一切不要になり、しかも連結作業は溶接のように熟練を必要としないため作業コストの著しい低減化を図ることができると共に、杭打ち工事期間の短縮を図ることができ、更にまた溶接作業のように雨天等の天候に左右されないため、杭打ち工事の遅延を来すようなことがない。   The effect of the invention by the above solution will be described with reference numerals in the embodiments described later. According to the pile main body connecting structure of the steel pipe pile of the invention according to claim 1, for example, a predetermined length in pile driving construction. When the steel pipe piles are successively added, the lower half of the connecting member N is internally fitted to the upper end of the pile main body 1 of the lower steel pipe pile K, and the connecting bolt side through hole 7 is connected to the connecting member side bolt through hole. 8, the bolt 12 is inserted into the nut holding portion 9 and screwed into the nut 10 to fix the lower half of the connecting member N to the upper end of the pile body 1 of the lower steel pipe pile K. The lower half of the pile body 1 of the upper steel pipe pile K is externally fitted to the upper half, and the nut is passed from the bolt insertion hole 7 at the lower end of the pile body of the upper steel pipe pile K to the connecting member side bolt insertion hole 8. Upper steel pipe pile by screwing into the nut 10 held in the holding part 9 Since the lower end of the pile body 1 is connected to the upper half of the connecting member N and the pile bodies 1 and 1 of both steel pipe piles K and K are connected to each other, it is used for welding as in the conventional connection work by welding. Equipment and power generators are no longer necessary, and the connection work does not require skill like welding, so the work cost can be significantly reduced and the pile driving work period can be shortened. Moreover, since it is not affected by the weather such as rainy weather as in the welding operation, there is no delay in the pile driving work.

また、この杭本体連結構造によれば、鋼管杭Kの製造において、長尺な杭本体1を複数に分割形成して分割杭本体1,1どうしを簡単容易に連結する場合も、連結部材Nを介して分割杭本体1,1どうしを連結する構造とすることにより、鋼管杭Kを施工現場へ運送する時には杭本体1を連結前の短尺状態でトラックに積み込み、施工現場で分割杭本体1,1どうしを連結部材Nを介して連結するようにすれば、積み下ろしも容易で、運搬も容易となるため、運送コストの大幅な削減が可能となる。   Moreover, according to this pile main body connection structure, in the manufacture of the steel pipe pile K, even when the long pile main body 1 is divided into a plurality of parts and the divided pile main bodies 1 and 1 are easily connected to each other, the connecting member N When the steel pile pile K is transported to the construction site, the pile body 1 is loaded on the truck in a short state before the connection, and the divided pile body 1 is constructed at the construction site. , 1 are connected to each other via a connecting member N, it is easy to load and unload and can be easily transported, so that the transportation cost can be greatly reduced.

請求項2に係る発明によれば、連結部材Nの各ナット保持部9が、基筒部6の内周面にボルト挿通孔8の内端側で左右対称位置に突設された両側一対のアーム壁11,11からなるもので、各アーム壁11が、縦壁部aと、縦壁部aの下端から内向きに突出するナット受け壁部bと、縦壁部aの前端から内向きに突出するナット抜け止め壁部cとからなる構造とすることによって、構造がきわめて簡単でありながら、ナット10を確実に保持させることができる。   According to the second aspect of the present invention, the nut holding portions 9 of the connecting member N are provided on the inner peripheral surface of the base tube portion 6 so as to protrude in a bilaterally symmetrical position on the inner end side of the bolt insertion hole 8. Each of the arm walls 11 includes a vertical wall portion a, a nut receiving wall portion b projecting inward from the lower end of the vertical wall portion a, and an inward direction from the front end of the vertical wall portion a. The nut 10 can be reliably held while the structure is very simple by using the structure including the nut retaining wall portion c projecting into the nut.

請求項3に係る発明によれば、連結部材Nの上端部及び下端部の夫々内周縁に沿って補強用内向きフランジ部13を設けたことにより、ボルト挿通孔8の穿設されている連結部材Nの連結端部の強度が補強されるから、連結部材Nの肉厚をできるだけ薄く、また連結部材Nの長さをできるだけ短くできて、連結部材Nの重量の軽減を図ることができる。また、連結部材内周面の上端部側ナット保持部9と下端部側ナット保持部9とを互いに上下逆方向に設け、上端部側フランジ部13には各上端部側ナット保持部9にナット10を挿入するためのナット挿入口14を、また下端部側フランジ部13には各下端部側ナット保持部9にナット10を挿入するためのナット挿入口14を夫々設けているから、連結部材Nの両端部を上下区別することなく任意に使用でき、連結作業が容易となる。   According to the third aspect of the present invention, the reinforcing inward flange portion 13 is provided along the inner peripheral edge of each of the upper end portion and the lower end portion of the connecting member N, so that the bolt insertion hole 8 is drilled. Since the strength of the connecting end portion of the member N is reinforced, the thickness of the connecting member N can be made as thin as possible, and the length of the connecting member N can be made as short as possible, so that the weight of the connecting member N can be reduced. Further, the upper end side nut holding portion 9 and the lower end side nut holding portion 9 on the inner peripheral surface of the connecting member are provided in the opposite directions to each other, and the upper end side flange holding portion 13 has a nut on each upper end side nut holding portion 9. Since the nut insertion port 14 for inserting the nut 10 is provided and the nut insertion port 14 for inserting the nut 10 in each lower end side nut holding portion 9 is provided in the lower end side flange portion 13, respectively, the connecting member Both ends of N can be arbitrarily used without distinction between the upper and lower sides, and the connecting work is facilitated.

請求項4に係る発明の杭本体連結構造によると、例えば鋼管杭Kの製造において、長尺な杭本体1を複数に分割形成して分割杭本体1,1どうしを簡単容易に連結する場合は、下基筒部22を下方の杭本体1の上端部に内嵌合して、ボルト12を杭本体側ボルト挿通孔7から基筒部側ボルト挿通孔8に挿通してナット保持部9内に保持されたナット10に螺合することにより、連結部材Mを下方の杭本体上端部に固定し、上基筒部21を上方の杭本体下端部に内嵌合して、ボルト12を杭本体側ボルト挿通孔7から基筒部側ボルト挿通孔8に挿通してナット保持部9内に保持されたナット10に螺合することにより、連結部材Mの上基筒部21を杭本体上端部に固定して両杭本体1,1を一体的に連結することができるから、鋼管杭Kを施工現場へ運送する時に、連結前の短尺状態でトラックに積み込み、施工現場で連結組み立てを行うようにすれば、積み下ろしもし易く、運搬も容易となるため、運送コストの大幅な削減が可能となる。   According to the pile main body connection structure of the invention according to claim 4, for example, in the manufacture of the steel pipe pile K, when the long pile main body 1 is divided into a plurality of pieces and the divided pile main bodies 1 and 1 are connected easily and easily, The lower base tube portion 22 is internally fitted to the upper end portion of the lower pile body 1, and the bolt 12 is inserted from the pile body side bolt insertion hole 7 to the base tube portion side bolt insertion hole 8 to enter the nut holding portion 9. The connecting member M is fixed to the upper end of the lower pile main body, and the upper base cylinder portion 21 is internally fitted to the lower end of the upper pile main body, and the bolt 12 is piled. The upper base cylinder portion 21 of the connecting member M is connected to the upper end of the pile body by inserting the main body side bolt insertion hole 7 into the base cylinder portion side bolt insertion hole 8 and screwing into the nut 10 held in the nut holding portion 9. Steel piles K can be constructed because both pile main bodies 1 and 1 can be integrally connected When transportation to field, loading the truck with short state before connection, if to perform the coupling assembly at the construction site, unloading if easy, since the transportation can be facilitated, a significant reduction in transportation cost is possible.

また、この杭本体連結構造によれば、杭打ち工事において所定長さの鋼管杭を所要本数逐次継ぎ足す場合には、従来の溶接による連結作業のように溶接用の電源や発電機などの設備が一切不要になり、しかも連結作業は溶接のように熟練を必要としないため作業コストの著しい低減化を図ることができると共に、杭打ち工事期間の短縮を図ることができ、更にまた溶接作業のように雨天等の天候に左右されないため、杭打ち工事の遅延を来すようなことがない。   In addition, according to this pile body connection structure, when a required number of steel pipe piles are successively added in pile driving work, facilities such as a welding power source and a generator are connected as in the conventional welding connection work. In addition, since the connection work does not require skill like welding, the work cost can be significantly reduced, and the pile driving work period can be shortened. Thus, it is not affected by the weather such as rainy weather, so there is no delay in pile driving work.

請求項5に記載の発明の杭本体連結構造によると、中間部に螺旋翼4をもつ鋼管杭Kの製造においては、円筒状本体20に螺旋翼4を突設した連結部材Mを使用すれば、杭打ち現場での連結組み立てが可能であるため、現場への運送時にはトラックの荷台に杭本体1と連結部材Mとを切り離して別々に積み重ねるようにすることにより、積載効率が良く、運送コストの大幅な削減が可能となる。   According to the pile main body connection structure of the invention described in claim 5, in the manufacture of the steel pipe pile K having the spiral blade 4 in the intermediate part, if the connecting member M having the spiral blade 4 protruding from the cylindrical main body 20 is used. Because it is possible to connect and assemble at the site of pile driving, the pile body 1 and the connecting member M are separated and stacked separately on the truck bed when transporting to the site. Can be greatly reduced.

請求項6に係る発明によれば、連結部材Mの各ナット保持部9が、基筒部6の内周面にボルト挿通孔8の内端側で左右対称位置に突設された両側一対のアーム壁11,11からなるもので、各アーム壁11が、縦壁部aと、縦壁部aの下端から内向きに突出するナット受け壁部bと、縦壁部aの前端から内向きに突出するナット抜け止め壁部cとからなる構造とすることによって、構造がきわめて簡単でありながら、ナット10を確実に保持させることができる。   According to the invention of claim 6, each nut holding portion 9 of the connecting member M is a pair of both sides projecting from the inner peripheral surface of the base tube portion 6 at a symmetrical position on the inner end side of the bolt insertion hole 8. Each of the arm walls 11 includes a vertical wall portion a, a nut receiving wall portion b projecting inward from the lower end of the vertical wall portion a, and an inward direction from the front end of the vertical wall portion a. The nut 10 can be reliably held while the structure is very simple by using the structure including the nut retaining wall portion c projecting into the nut.

請求項7に記載のように、上基筒部21の上端部内周縁に沿って補強用の内向きフランジ部13を突設すると共に、下基筒部22の下端部内周縁に沿って補強用の内向きフランジ部13を設けることによって、ボルト挿通孔8の穿設されている上下基筒部21,22の強度が補強されるから、連結部材Mの肉厚をできるだけ薄く、また連結部材Mの長さをできるだけ短くできて、連結部材Mの重量の軽減を図ることができる。また、上基筒部側ナット保持部9と下基筒部側ナット保持部9とを互いに上下逆方向に設け、上基筒部側フランジ部13には各上基筒部側ナット保持部9にナット10を挿入するためのナット挿入口14を、また下基筒部側フランジ部13には各下基筒部側ナット保持部9にナット10を挿入するためのナット挿入口14を夫々設けているから、連結部材Mの両端部を上下区別することなく任意に使用でき、連結作業が容易となる。   As described in claim 7, a reinforcing inward flange portion 13 protrudes along the inner peripheral edge of the upper end portion of the upper base cylinder portion 21, and the reinforcing flange portion extends along the inner peripheral edge of the lower end portion of the lower base tube portion 22. By providing the inward flange portion 13, the strength of the upper and lower base tube portions 21 and 22 in which the bolt insertion hole 8 is drilled is reinforced, so that the thickness of the connecting member M is made as thin as possible and the connecting member M The length can be shortened as much as possible, and the weight of the connecting member M can be reduced. In addition, the upper base tube portion side nut holding portion 9 and the lower base tube portion side nut holding portion 9 are provided in the upside down direction, and each upper base tube portion side nut holding portion 9 is provided in the upper base tube portion side flange portion 13. A nut insertion port 14 for inserting the nut 10 is provided in the lower base tube portion side flange portion 13, and a nut insertion port 14 for inserting the nut 10 in each lower base tube portion side nut holding portion 9 is provided. Therefore, both end portions of the connecting member M can be arbitrarily used without distinguishing between the upper and lower sides, and the connecting operation becomes easy.

請求項8にの発明の鋼管杭のように、ナット保持部9の各アーム壁11を形成するナット受け壁部bの上面を水平面に対し約30°の傾斜面に形成することにより、六角ナット10をナット保持部9内に収容保持する時に、ナット10の外周端面にピッタリ係合して安定状態に保持することができる。   As in the steel pipe pile of the invention according to claim 8, by forming the upper surface of the nut receiving wall portion b forming each arm wall 11 of the nut holding portion 9 on an inclined surface of about 30 ° with respect to the horizontal plane, When 10 is accommodated and held in the nut holding portion 9, it can be perfectly engaged with the outer peripheral end surface of the nut 10 and held in a stable state.

請求項9に記載のように、連結部材N,Mは鋳鋼又は鋳鉄からなる一体成形鋳造物であるから、連結部材N,Mの製造が容易となる。   As described in claim 9, since the connecting members N and M are integrally formed castings made of cast steel or cast iron, the manufacturing of the connecting members N and M is facilitated.

以下に本発明の好適な一実施形態を図面に基づいて説明すると、図1は円筒状連結部材を示す斜視図、図2の(a) は同連結部材の正面図、(b) は平面図、(c) は底面図であり、図3は同連結部材の縦断面図であり、図4の(a) は図2の(b) の矢印Xで示す部分の拡大図、(b) は図3の矢印Yで示す部分の拡大図、(c) は(a) のZ−Z線断面図であり、図5は下方の杭本体の上端部に上方の杭本体の下端部を連結している状態を示す説明図、図6は両杭本体の連結を終えた状態の説明図である。これらの図において、Kは杭本体1からなる鋼管杭を示し、Nは円筒状の連結部材を示す。   1 is a perspective view showing a cylindrical connecting member, FIG. 2 (a) is a front view of the connecting member, and FIG. 2 (b) is a plan view. , (C) is a bottom view, FIG. 3 is a longitudinal sectional view of the connecting member, (a) in FIG. 4 is an enlarged view of a portion indicated by an arrow X in (b) in FIG. 2, and (b) is in FIG. 3 is an enlarged view of the portion indicated by the arrow Y in FIG. 3, (c) is a cross-sectional view taken along the line ZZ of (a), and FIG. FIG. 6 is an explanatory view showing a state where the connection of both pile main bodies is finished. In these drawings, K represents a steel pipe pile made of the pile body 1, and N represents a cylindrical connecting member.

各鋼管杭Kには杭本体1の上端部及び下端部に夫々周方向一定間隔おきにボルト挿通孔7が設けられている。連結部材Nは、鋳鋼又は鋳鉄からなる一体成形鋳造物であり、連結すべき鋼管杭Kの杭本体1の内径より僅かに小さい外径を有し、図5及び図6に示すように、鋼管杭Kの下方の杭本体1の上端部に上方の鋼管杭Kの杭本体1の下端部を連結するにあたり、この連結部材Nの下半部が下方の鋼管杭Kの杭本体1の上端部に内嵌合され、その上半部が上方の杭本体1の下端部に内嵌合されるようになっている。尚、一体成形鋳造物である鋳鋼にはステンレスも含まれるものとする。   Each steel pipe pile K is provided with bolt insertion holes 7 at a certain interval in the circumferential direction at the upper end and lower end of the pile body 1. The connecting member N is an integrally formed casting made of cast steel or cast iron, and has an outer diameter slightly smaller than the inner diameter of the pile body 1 of the steel pipe pile K to be connected. As shown in FIGS. When connecting the lower end of the pile body 1 of the upper steel pipe pile K to the upper end of the pile body 1 below the pile K, the lower half of the connecting member N is the upper end of the pile body 1 of the lower steel pipe pile K. The upper half part is internally fitted to the lower end part of the upper pile body 1. In addition, stainless steel is also included in the cast steel that is an integrally formed casting.

連結部材Nには上端部側及び下端部側に、この連結部材Nを杭本体1の連結端部に内嵌合した時に杭本体側ボルト挿通孔7と合致する位置にボルト挿通孔8が設けられていると共に、連結部材Nの内周面側には、各連結部材側ボルト挿通孔8と軸方向に対向する位置で連結部材Nの上方より挿入されるナット10を回転不能にして且つ前後移動不能に保持するためのナット保持部9が設けられている。尚、前後移動不能に保持するとは、図7の(a) から分かるように、ナット10が軸方向の前後に不都合に移動しないように、ナット保持部9内に保持することである。   The connecting member N is provided with bolt insertion holes 8 on the upper end side and the lower end side at positions where the connecting member N is fitted to the connecting end portion of the pile body 1 so as to coincide with the pile body side bolt insertion holes 7. In addition, on the inner peripheral surface side of the connecting member N, the nut 10 inserted from above the connecting member N at a position facing the connecting member side bolt insertion holes 8 in the axial direction is made non-rotatable and front and rear. A nut holding part 9 is provided for holding it immovable. In addition, holding | maintaining so that it cannot move back and forth is hold | maintaining in the nut holding | maintenance part 9 so that the nut 10 may not move in front and back in an axial direction so that it may understand from (a) of FIG.

各ナット保持部9は、図2〜図4及び図7から分かるように、連結部材Nの内周面におけるボルト挿通孔8の内端側でナット10を左右両側と下部側と前側とで保持するように左右対称位置に突設された両側一対のアーム壁11,11からなり、各アーム壁11は、図4の(a) 〜(c) 及び図7の(a) ,(b) に示すように、縦壁部aと、この縦壁部aの下端から内向きに突出するナット受け壁部bと、縦壁部aの前端から内向きに突出するナット抜け止め壁部cとによって形成され、左右両アーム壁11,11の左右に対向する縦壁部a,aの対向間隔によってナット10の回転を阻止し、ナット受け壁部bでナット10が落ちないように受け止め、ナット抜け止め壁部cによってナット10がボルトねじ込み方向前方へ抜け出るのを阻止するようになっている。   As can be seen from FIGS. 2 to 4 and 7, each nut holding portion 9 holds the nut 10 on both the left and right sides, the lower side, and the front side on the inner end side of the bolt insertion hole 8 on the inner peripheral surface of the connecting member N. As shown in FIG. 4, a pair of arm walls 11 and 11 projecting from left and right symmetrical positions are provided. Each arm wall 11 is shown in (a) to (c) of FIG. 4 and (a) and (b) of FIG. As shown, a vertical wall portion a, a nut receiving wall portion b projecting inward from the lower end of the vertical wall portion a, and a nut retaining wall portion c projecting inward from the front end of the vertical wall portion a. The rotation of the nut 10 is blocked by the opposing spacing between the left and right arm walls 11, 11 facing the left and right sides of the left and right arm walls 11, 11, and the nut receiving wall portion b receives the nut 10 so that it does not fall off. The stop wall portion c prevents the nut 10 from being pulled out forward in the bolt screwing direction. It has become.

各ナット保持部9の各アーム壁11を形成するナット受け壁部bは、図4の(c) に示すように、その上面が水平面に対して約30°の傾斜面に形成されている。この傾斜面の傾斜角度の30°は、図7の(b) を参照すれば分かるように、六角ナット10をナット保持部9内に収容保持する時に、ナット10の左右両端面が左右両縦壁部a,aと平行に位置した状態で下端面側が左右両ナット受け壁部b,bの傾斜面にピッタリ係合して、ナット10全体を安定状態に保持することのできる角度である。   As shown in FIG. 4 (c), the upper surface of the nut receiving wall portion b forming each arm wall 11 of each nut holding portion 9 has an inclined surface of about 30 ° with respect to the horizontal plane. As can be seen from FIG. 7B, the inclination angle of 30 ° of the inclined surface is such that when the hexagon nut 10 is accommodated and held in the nut holding portion 9, the left and right end surfaces of the nut 10 are both left and right. The angle is such that the lower end surface side is perfectly engaged with the inclined surfaces of the left and right nut receiving wall portions b, b in a state of being parallel to the wall portions a, a, and the entire nut 10 can be held in a stable state.

上記のような構成の連結部材Nを使用して、図5及び図6に示すように下方の鋼管杭Kの杭本体1の上端部に上方の鋼管杭Kの杭本体1の下端部を連結するには、先ず、連結部材Nの内周面側の上端部側及び下端部側に設けてあるナット保持部9にナット10を連結部材Nの上方より挿入して、図7の(a) 、(b) に示すように保持させておく。しかして、下方の鋼管杭Kの杭本体1の上端部に連結部材Nの下半部を内嵌合した後、図7の(a) に示すように、ボルト12を、杭本体側ボルト挿通孔7から連結部材側ボルト挿通孔8に挿通すると共に、このボルト12の先端部を、各ナット保持部9内に保持されているナット10に螺合して締め付けることにより、図8に示すように連結部材Nを杭本体1の上端部に圧着して、図5に示すように連結部材Nの下半部を下方の鋼管杭Kの杭本体1の上端部に取り付け固定する。   Using the connecting member N configured as described above, the lower end portion of the pile body 1 of the upper steel pipe pile K is connected to the upper end portion of the pile body 1 of the lower steel pipe pile K as shown in FIGS. First, the nut 10 is inserted from above the connecting member N into the nut holding portion 9 provided on the upper end side and the lower end side on the inner peripheral surface side of the connecting member N, and FIG. , Hold as shown in (b). Then, after fitting the lower half of the connecting member N into the upper end of the pile body 1 of the lower steel pipe pile K, the bolt 12 is inserted into the pile body side bolt as shown in FIG. As shown in FIG. 8, the bolt 7 is inserted into the connecting member side bolt insertion hole 8 from the hole 7 and screwed into the nut 10 held in each nut holding portion 9 to be tightened. The connecting member N is pressure-bonded to the upper end portion of the pile body 1, and the lower half portion of the connecting member N is attached and fixed to the upper end portion of the pile body 1 of the lower steel pipe pile K as shown in FIG.

こうして連結部材Nの下半部を下方の鋼管杭Kの杭本体1の上端部に固定した後、図5に示すように下方の鋼管杭Kの杭本体1の上端から突出している連結部材Nの上半部に、上方の鋼管杭Kの杭本体1の下端部を外嵌合し、上方の鋼管杭Kの杭本体1下端部のボルト挿通孔7から連結部材側ボルト挿通孔8に挿通すると共に、このボルト12の先端部をナット保持部9内に保持されているナット10に螺合して締め付けることにより、上方の鋼管杭Kの杭本体1の下端部を連結部材Nの上半部に連結し、これにより上方の鋼管杭Kの杭本体1と下方の鋼管杭Kの杭本体1との端部どうしを連結部材Nを介して一体的に連結することができる。この連結構造の外観を図6に示す。   Thus, after fixing the lower half part of the connection member N to the upper end part of the pile main body 1 of the lower steel pipe pile K, as shown in FIG. 5, the connection member N which protrudes from the upper end of the pile main body 1 of the lower steel pipe pile K is shown. The lower end portion of the pile body 1 of the upper steel pipe pile K is externally fitted to the upper half portion of the steel pipe pile K, and is inserted into the connecting member side bolt insertion hole 8 from the bolt insertion hole 7 at the lower end portion of the pile body 1 of the upper steel pipe pile K. At the same time, the lower end portion of the pile body 1 of the upper steel pipe pile K is connected to the upper half of the connecting member N by screwing and tightening the tip end portion of the bolt 12 to the nut 10 held in the nut holding portion 9. Thus, the ends of the pile main body 1 of the upper steel pipe pile K and the pile main body 1 of the lower steel pipe pile K can be integrally connected via the connecting member N. The appearance of this connection structure is shown in FIG.

上記のように下方の鋼管杭Kの杭本体1の上端部に上方の鋼管杭Kの杭本体1の下端部を連結するにあたり、連結部材Nの内周面側の上端部側と下端部側とに設けてあるナット保持部9に予めナット10を挿入しておいて、連結部材Nの下半部を下方の鋼管杭Kの杭本体1の上端部に内嵌合して杭本体側ボルト挿通孔7から連結部材側ボルト挿通孔8にボルト12を挿通し、ナット保持部9内のナット10にねじ込むことにより、連結部材Nの下半部を下方の鋼管杭Kの杭本体1の上端部に固定した後、連結部材Nの上半部に上方の鋼管杭Kの杭本体1の下端部を外嵌合し、上方の鋼管杭Kの杭本体1下端部のボルト挿通孔7から連結部材側ボルト挿通孔8に挿通し、ナット保持部9内に保持されているナット10にねじ込むことにより上方の鋼管杭Kの杭本体1の下端部を連結部材Nの上半部に連結して、両鋼管杭K,Kの杭本体1,1どうしを一体的に連結するようしたから、従来の溶接による連結作業のように溶接用の電源や発電機等の設備が一切不要になり、しかも連結作業に熟練を必要としないために、作業コストの著しい低減化を図ることができ、その上に溶接作業のように雨天等の天候に左右されないため、杭打ち工事の遅延を来すようなことがない。   In connecting the lower end part of the pile main body 1 of the upper steel pipe pile K to the upper end part of the pile main body 1 of the lower steel pipe pile K as described above, the upper end part side and the lower end part side on the inner peripheral surface side of the connecting member N The nut 10 is inserted in advance in the nut holding part 9 provided in the upper part, and the lower half of the connecting member N is internally fitted to the upper end of the pile body 1 of the lower steel pipe pile K, and the pile body side bolt The bolt 12 is inserted from the insertion hole 7 into the connecting member-side bolt insertion hole 8 and screwed into the nut 10 in the nut holding portion 9 so that the lower half of the connecting member N is the upper end of the pile body 1 of the lower steel pipe pile K. After fixing to the upper part, the lower end part of the pile main body 1 of the upper steel pipe pile K is externally fitted to the upper half part of the connecting member N and connected from the bolt insertion hole 7 at the lower end part of the pile main body 1 of the upper steel pipe pile K. By inserting into the member side bolt insertion hole 8 and screwing into the nut 10 held in the nut holding portion 9, the upper side Since the lower end portion of the pile body 1 of the steel pipe pile K is connected to the upper half of the connecting member N, the pile bodies 1 and 1 of both steel pipe piles K and K are integrally connected to each other. No equipment such as a power source or generator for welding is required as in the connection work, and no skill is required for the connection work, so that the work cost can be significantly reduced, and the welding work can be further reduced. Because it is not affected by weather such as rainy weather, there is no such thing as delaying pile driving work.

上述した実施形態においては、連結部材Nの内周面側の上端部側及び下端部側に設けるナット保持部9は、連結部材Nのボルト挿通孔8の内端側で左右対称位置に突設された両側一対のアーム壁11,11からなるもので、各アーム壁11が、縦壁部aと、縦壁部aの下端から内向きに突出するナット受け壁部bと、縦壁部aの前端から内向きに突出するナット抜け止め壁部cとからなる構造としているが、このような構造のナット保持部9によれば、構造が簡単でありながら、ナット10を確実に保持することができるから、鋳鋼からなる一体成形鋳物のナット保持部9として最適である。   In the embodiment described above, the nut holding portions 9 provided on the upper end portion side and the lower end portion side on the inner peripheral surface side of the connecting member N project from the inner end side of the bolt insertion hole 8 of the connecting member N at a bilaterally symmetrical position. The arm walls 11 are composed of a pair of arm walls 11 and 11 on both sides. Each arm wall 11 has a vertical wall portion a, a nut receiving wall portion b projecting inwardly from a lower end of the vertical wall portion a, and a vertical wall portion a. The nut retaining wall portion c projecting inward from the front end of the nut has a structure, but the nut holding portion 9 having such a structure can hold the nut 10 reliably while having a simple structure. Therefore, it is most suitable as the nut holding portion 9 of an integrally formed casting made of cast steel.

また上記実施形態の連結部材Nにおいてナット保持部9にナット10を挿入した場合、連結部材Nが直立状態のままであれば、ナット10がナット保持部9の上部側から抜け出ることはないが、連結部材Nが横向きになった状態では抜け出るおそれがあることから、図7の(b) に仮想線で示すように、例えば、片方のアーム壁11の上端部側にピン挿通孔32を設けておいて、これに抜け止めピン33をナット保持部9の内方へ差し込むことによって、如何なる場合でもナット10の抜け出しを防止することができる。   Further, when the nut 10 is inserted into the nut holding portion 9 in the connecting member N of the above embodiment, the nut 10 does not come out from the upper side of the nut holding portion 9 as long as the connecting member N remains in an upright state. Since there is a possibility that the connecting member N is pulled out in the horizontal state, for example, a pin insertion hole 32 is provided on the upper end side of one arm wall 11 as shown by a virtual line in FIG. In this case, by inserting the retaining pin 33 into the inside of the nut holding portion 9, it is possible to prevent the nut 10 from coming out in any case.

以上は、杭先端部が支持層に達するまで所定長さの杭を逐次継ぎ足してゆく杭打ち工事に適用される鋼管杭Kの杭本体連結構造についての説明であるが、次に、鋼管杭を製造するにあたって、1本の鋼管杭の杭本体を複数に分割して、その分割体どうしを連結して鋼管杭Kを製造する場合の杭本体連結構造の実施形態について説明する。   The above is an explanation of the pile body connection structure of the steel pipe pile K applied to the pile driving work in which piles of a predetermined length are sequentially added until the pile tip reaches the support layer. In manufacturing, an embodiment of a pile body connecting structure in which a steel pipe pile K is manufactured by dividing a pile body of one steel pipe pile into a plurality of pieces and connecting the divided bodies to each other will be described.

図9は杭本体1の下端部に螺旋翼4付き掘削ヘッド2を設けると共に杭本体1の中間所要部に螺旋翼4を設けた多翼型の鋼管杭Kを示し、図10の(a) は杭本体1,1どうしを連結する連結部材Mを示し、(b) は螺旋翼4付き掘削ヘッド2を示し、図11はこの多翼型鋼管杭Kを組み付ける方法を示す。   FIG. 9 shows a multi-blade type steel pipe pile K in which the excavation head 2 with the spiral blade 4 is provided at the lower end portion of the pile body 1 and the spiral blade 4 is provided at the intermediate required portion of the pile body 1. FIG. 11 shows a connecting member M for connecting the pile main bodies 1 and 1, (b) shows the excavation head 2 with the spiral blade 4, and FIG. 11 shows a method for assembling the multi-blade steel pipe pile K.

連結部材Mは、図10の(a) 及び図11に示すように、杭本体1の外径と同じ外径を有する円筒状本体20の上下両端部に、外径が杭本体1の内径より小さく上方の杭本体1の下端部及び下方の杭本体1の上端部が夫々外嵌合する上下基筒部21,22を形成してなるもので、上下各基筒部21,22には、この基筒部21,22に杭本体1の連結端部が外嵌合した時に杭本体側ボルト挿通孔7と合致する位置にボルト挿通孔8を設けると共に、上下各基筒部21,22の内周面側には、各基筒部側ボルト挿通孔8と軸方向に対向する位置で連結部材Mの上方より挿入されるナット10を回転不能にして且つ前後移動不能に保持するナット保持部9を夫々設けている。各ナット保持部9の構造は、前述した連結部材Nのナット保持部9と同じである。この連結部材Mも、前記連結部材Nと同様に鋳鋼又は鋳鉄からなる一体成形鋳造物であって、製造が容易である。   As shown in FIG. 10 (a) and FIG. 11, the connecting member M has an outer diameter that is greater than the inner diameter of the pile body 1 at the upper and lower ends of the cylindrical body 20 having the same outer diameter as the outer diameter of the pile body 1. The upper and lower base tube portions 21 and 22 are formed by the lower end portion of the lower pile body 1 and the upper end portion of the lower pile body 1 being respectively fitted outside. A bolt insertion hole 8 is provided at a position that coincides with the pile body side bolt insertion hole 7 when the connecting end portion of the pile body 1 is externally fitted to the base cylinder portions 21, 22, and the upper and lower base cylinder portions 21, 22 are On the inner peripheral surface side, a nut holding portion that holds the nut 10 inserted from above the connecting member M at a position facing the base tube portion side bolt insertion holes 8 in the axial direction so as not to be rotatable and to be movable back and forth. 9 is provided. The structure of each nut holding part 9 is the same as the nut holding part 9 of the connecting member N described above. Similarly to the connecting member N, the connecting member M is an integrally formed casting made of cast steel or cast iron and is easy to manufacture.

螺旋翼4付き掘削ヘッド2は、前記連結部材N,Mと同様に鋳鋼又は鋳鉄からなる一体成形鋳物で、図10の(b) 及び図11から分かるように、底部3aが略円錐形状を成す有底円筒状のヘッド本体3を有し、このヘッド本体3に螺旋翼4が突設され、またヘッド本体3の円錐形状底3aの下面に切削刃5が突設され、ヘッド本体3の上端部には、杭本体1の下端部が外嵌合する短円筒状の基筒部6が形成され、この基筒部6には、これに外嵌合される杭本体1のボルト挿通孔7と合致するボルト挿通孔8が周方向一定間隔おきに穿設されている。そして、基筒部6の内周面側には、基筒部側ボルト挿通孔8と軸方向に対向する位置で基筒部6の上方より挿入されるナット10を回転不能にして且つ前後移動不能に保持するためのナット保持部9が設けられている。各ナット保持部9の構造は、連結部材N,Mのナット保持部9と同じである。   The excavation head 2 with the spiral blade 4 is an integrally formed casting made of cast steel or cast iron like the connecting members N and M, and as can be seen from FIGS. 10 (b) and 11, the bottom 3a has a substantially conical shape. The head body 3 has a bottomed cylindrical head body 3. A spiral blade 4 projects from the head body 3, and a cutting blade 5 projects from the lower surface of the conical bottom 3 a of the head body 3. A short cylindrical base tube portion 6 to which the lower end portion of the pile main body 1 is externally fitted is formed in the portion, and the bolt insertion hole 7 of the pile main body 1 to be externally fitted thereto is formed in the base tube portion 6. Bolt insertion holes 8 that coincide with each other are formed at regular intervals in the circumferential direction. And on the inner peripheral surface side of the base tube portion 6, the nut 10 inserted from above the base tube portion 6 is made non-rotatable and moved back and forth at a position facing the base tube portion side bolt insertion hole 8 in the axial direction. A nut holding portion 9 is provided for holding it impossible. The structure of each nut holding part 9 is the same as the nut holding part 9 of the connecting members N and M.

従って、この多翼型鋼管杭Kを組み付けるには、図11に示すように、先ず、連結部材Mの下基筒部22を下方の分割杭本体1の上端部に内嵌合して、ボルト12(図7の(a) 参照)を杭本体側ボルト挿通孔7から基筒部側ボルト挿通孔8に挿通してナット保持部9内に保持されたナット10に螺合することにより、連結部材Mを下方の杭本体上端部に固定し、この後に上基筒部21を分割された上方の杭本体1の下端部に内嵌合して、上記同様にボルト12を杭本体側ボルト挿通孔7から基筒部側ボルト挿通孔8に挿通してナット保持部9内に保持されたナット10に螺合することにより、連結部材Mの上基筒部21を杭本体上端部に固定し、これによって両分割杭本体1,1を一体的に連結する。   Therefore, in order to assemble this multi-blade type steel pipe pile K, as shown in FIG. 11, first, the lower base cylinder portion 22 of the connecting member M is internally fitted to the upper end portion of the lower divided pile body 1, and the bolt 12 (see (a) of FIG. 7) is inserted into the base cylinder side bolt insertion hole 8 from the pile body side bolt insertion hole 7 and screwed into the nut 10 held in the nut holding portion 9 to thereby connect. The member M is fixed to the upper end of the lower pile main body, and then the upper base cylinder portion 21 is internally fitted to the lower end of the divided upper pile main body 1, and the bolt 12 is inserted into the pile main body side bolt in the same manner as described above. The upper base tube portion 21 of the connecting member M is fixed to the upper end portion of the pile body by being inserted into the base tube portion side bolt insertion hole 8 from the hole 7 and screwed into the nut 10 held in the nut holding portion 9. Thus, the two divided pile main bodies 1 and 1 are integrally connected.

こうして分割された上下両杭本体1,1を連結部材Mを介して連結した後、下方の杭本体1の下端部に螺旋翼4付き掘削ヘッド2を取り付ける。この掘削ヘッド2の取り付けも、上記同様に下方側杭本体1の下端部をヘッド本体3の基筒部6に外嵌合し、ボルト12(図7の(a) 参照)を杭本体1側ボルト挿通孔7から基筒部側ボルト挿通孔8に挿通して各ナット保持部9内に保持されているナット10に螺合することにより、杭本体1の下端部にヘッド本体3を取り付け固定することができる。   After the upper and lower pile bodies 1, 1 thus divided are connected via the connecting member M, the excavation head 2 with the spiral blade 4 is attached to the lower end portion of the lower pile body 1. In the same manner as above, the excavation head 2 is attached by fitting the lower end portion of the lower pile body 1 to the base tube portion 6 of the head body 3 and attaching bolts 12 (see FIG. 7 (a)) to the pile body 1 side. The head main body 3 is attached and fixed to the lower end portion of the pile main body 1 by being inserted into the bolt insertion hole 8 from the bolt insertion hole 7 and screwed into the nut 10 held in each nut holding portion 9. can do.

図9〜図11に示す実施形態の鋼管杭Kは、杭本体1の下端部と中間部に螺旋翼4を有する多翼型鋼管杭であるが、杭本体1の下端部の掘削ヘッド2にのみ螺旋翼4をもつ拡底型や、螺旋翼4をもたず、杭本体の下端部に掘削ヘッドのみ取り付けたストレート型の鋼管杭において、杭本体1を複数に分割して、その分割した杭本体1どうしを連結する場合に、上述した連結部材Mをすることができる。   The steel pipe pile K of the embodiment shown in FIGS. 9 to 11 is a multi-blade type steel pipe pile having spiral blades 4 at the lower end portion and intermediate portion of the pile main body 1. In the widened type with only the spiral blade 4 or the straight type steel pipe pile without the spiral blade 4 and only the excavation head attached to the lower end of the pile body, the pile body 1 is divided into a plurality of parts and the divided pile When the main bodies 1 are connected to each other, the connecting member M described above can be used.

上記のような連結部材Mによれば、長尺な杭本体1を複数に分割形成して分割杭本体1,1どうしを簡単容易に連結することができるから、鋼管杭Kを施工現場へ運送する場合に、連結前の短尺状態でトラックに積み込むようにすれば、積み込みもし易く、比較的小型のトラックでも運ぶことができる。特に中間部に螺旋翼4をもつ鋼管杭Kの場合には、円筒状本体20に螺旋翼4を突設した連結部材Mを使用すれば、施工現場への運送時にはトラックの荷台に杭本体1と連結部材Mとを別々に積み重ねることにより、積載効率が良く、運送コストを低減することができる。   According to the connecting member M as described above, the long pile main body 1 can be divided into a plurality of pieces and the divided pile main bodies 1 and 1 can be easily connected to each other, so that the steel pipe pile K is transported to the construction site. In this case, if the truck is loaded in a short state before the connection, the truck can be loaded easily and can be carried even by a relatively small truck. In particular, in the case of a steel pipe pile K having a spiral blade 4 in the middle part, if a connecting member M having a spiral blade 4 protruding from a cylindrical main body 20 is used, the pile body 1 can be used as a truck bed during transport to a construction site. And the connecting member M are stacked separately, the loading efficiency is good and the transportation cost can be reduced.

また、連結部材Mは、上記のように杭本体1を複数に分割して、その分割した杭本体1どうしを連結する場合に限るものではなく、図5及び図6によって説明した連結部材Nのように所定長さの鋼管杭を所要本数逐次継ぎ足してゆく杭打ち工事にも使用することができる。もちろん、連結部材Mも、所定長さの鋼管杭を所要本数逐次継ぎ足してゆく杭打ち工事に使用することができるものである。   In addition, the connecting member M is not limited to the case where the pile body 1 is divided into a plurality of parts as described above and the divided pile bodies 1 are connected to each other, and the connecting member M described with reference to FIGS. Thus, it can also be used for pile driving work in which steel pipe piles of a predetermined length are sequentially added as many as required. Of course, the connecting member M can also be used for pile driving work in which a required number of steel pipe piles are sequentially added.

図12及び図13は本発明の他の実施形態による連結部材Nを示し、図12の(a) は連結部材Nの正面図、(b) は平面図、(c) は(a) のP−P線断面図、(d) は底面図、(e) は絵のQ−Q線断面図であり、図13の(a) は連結部材N及び塞ぎリング15を示す斜視図、(b) は塞ぎリング15の取付方法を示す説明斜視図である。   12 and 13 show a connecting member N according to another embodiment of the present invention. FIG. 12 (a) is a front view of the connecting member N, (b) is a plan view, and (c) is a P of (a). -P line sectional view, (d) is a bottom view, (e) is a QQ line sectional view of the picture, (a) in FIG. 13 is a perspective view showing the connecting member N and the closing ring 15, (b) FIG. 6 is an explanatory perspective view showing a method for attaching the closing ring 15.

この実施形態では、円筒状連結部材Nの上端部及び下端部の夫々内周縁に沿って補強用の内向きフランジ部13,13が突設され、そして連結部材Nの内周面の上端部側ナット保持部9と下端部側ナット保持部9とは、図12の(e) と図3とを比較参照すれば分かるように、上下対称状に設けられている(即ち、先の実施形態では、図3に示すように、上端部側ナット保持部9と下端部側ナット保持部9とは同じ向きに設けてある)。そして、上端部側フランジ部13には各上端部側ナット保持部9にナット10を挿入するためのナット挿入口14が設けられ、また下端部側フランジ部13には各下端部側ナット保持部9にナット10を挿入するためのナット挿入口14が設けられている。   In this embodiment, reinforcing inward flange portions 13, 13 project along the inner peripheral edges of the upper end portion and the lower end portion of the cylindrical connecting member N, respectively, and the upper end side of the inner peripheral surface of the connecting member N The nut holding part 9 and the lower end side nut holding part 9 are provided symmetrically in the vertical direction as can be understood by comparing FIG. 12 (e) and FIG. 3 (that is, in the previous embodiment). As shown in FIG. 3, the upper end side nut holding part 9 and the lower end side nut holding part 9 are provided in the same direction). The upper end side flange portion 13 is provided with a nut insertion port 14 for inserting the nut 10 into each upper end side nut holding portion 9, and the lower end side flange holding portion 13 is provided with each lower end side nut holding portion. 9 is provided with a nut insertion port 14 for inserting the nut 10.

各ナット保持部9は、図4に示すような先の実施形態のものと全く同じ構成であって、ボルト挿通孔8を中心として左右対称位置に突設された両側一対のアーム壁11,11からなり、各アーム壁11は、図4の(a) 〜(c) を参照して、縦壁部aと、縦壁部aの下端から内向きに突出するナット受け壁部bと、縦壁部aの前端から内向きに突出するナット抜け止め壁部cとからなるもので、上端部側ナット保持部9には上端部側フランジ部13のナット挿入口14からナット10を挿入し、下端部側ナット保持部9については、連結部材Nを引っ繰り返して上下を逆にした状態で、その下端部側フランジ部13のナット挿入口14からナット10を挿入する。   Each nut holding portion 9 has exactly the same configuration as that of the previous embodiment as shown in FIG. 4, and a pair of arm walls 11, 11 on both sides projecting in a bilaterally symmetrical position around the bolt insertion hole 8. Each arm wall 11 includes a vertical wall portion a, a nut receiving wall portion b projecting inwardly from the lower end of the vertical wall portion a, and a vertical wall with reference to FIGS. 4 (a) to 4 (c). A nut retaining wall portion c projecting inward from the front end of the wall portion a, and the nut 10 is inserted into the upper end side nut holding portion 9 from the nut insertion port 14 of the upper end side flange portion 13; About the lower end side nut holding part 9, the nut 10 is inserted from the nut insertion port 14 of the lower end part side flange part 13 in the state which repeated the connection member N and turned upside down.

上記のように連結部材Nを引っ繰り返して上下を逆にした状態でナット挿入口14からナット保持部9内にナット10を挿入した後、連結部材Nを再び引っ繰り返すと、挿入したナット10がナット挿入口14から出てしまうおそれがあるため、図13の(a) ,(b) に示すように、フランジ部13のナット挿入口14よりナット10をナット保持部9内に挿入した後、そのナット挿入口14を塞ぎリング15で塞ぐようにする。このリング15には例えば直径方向両端部に一対ずつのピン孔17を設け、またフランジ部13にもリング15のピン孔17と対応する位置にピン孔18を設けておいて、図13の(b) に示すように、フランジ部13に塞ぎリング15を当て付けた状態で、コ字形のピン16をリング15のピン孔17からフランジ部13のピン孔18へと挿着して固定する。尚、この塞ぎリング15は、上下両方のフランジ部13,13に取り付ける必要はなく、最終的に連結部材Nの下側に位置する何れか一方のフランジ部13に取り付ければよい。   After inserting the nut 10 into the nut holding part 9 from the nut insertion port 14 in a state where the connecting member N is repeatedly turned upside down as described above, when the connecting member N is repeated again, the inserted nut 10 is Since there is a possibility of coming out of the nut insertion port 14, as shown in FIGS. 13A and 13B, after inserting the nut 10 into the nut holding portion 9 from the nut insertion port 14 of the flange portion 13, The nut insertion port 14 is closed with a ring 15. For example, the ring 15 is provided with a pair of pin holes 17 at both ends in the diametrical direction, and the flange portion 13 is also provided with pin holes 18 at positions corresponding to the pin holes 17 of the ring 15 as shown in FIG. As shown in b), the U-shaped pin 16 is inserted and fixed from the pin hole 17 of the ring 15 to the pin hole 18 of the flange portion 13 with the ring 15 being applied to the flange portion 13. The closing ring 15 does not need to be attached to both the upper and lower flange portions 13 and 13 and may be attached to any one of the flange portions 13 finally located on the lower side of the connecting member N.

上記のような構成の連結部材Nを使用して下方の鋼管杭Kの杭本体1の上端部に上方の鋼管杭Kの杭本体1の下端部を連結するには、先ず、図13の(a) に示すように、連結部材Nの上端部側フランジ部13の各ナット挿入口14より上端部側ナット保持部9にナット10を挿入した後、この連結部材Nを引っ繰り返して、反対側(下端部側)フランジ部13の各ナット挿入口14よりそのナット保持部9にナット10を挿入し、そうしてこのフランジ部13に塞ぎリング15を取り付けてナット挿入口14を塞いだ状態で、この連結部材Nを再び元の状態に引っ繰り返して、塞ぎリング15を取り付けた側のフランジ部13を下側に位置させる。   In order to connect the lower end portion of the pile body 1 of the upper steel pipe pile K to the upper end portion of the pile body 1 of the lower steel pipe pile K using the connecting member N having the above configuration, first, as shown in FIG. As shown in a), after inserting the nut 10 into the upper end side nut holding portion 9 from each nut insertion port 14 of the upper end side flange portion 13 of the connecting member N, the connecting member N is repeated and the opposite side (Lower end portion side) A nut 10 is inserted into the nut holding portion 9 from each nut insertion port 14 of the flange portion 13, and a closing ring 15 is attached to the flange portion 13 so that the nut insertion port 14 is blocked. Then, the connecting member N is repeated again in the original state, and the flange portion 13 on the side where the closing ring 15 is attached is positioned on the lower side.

この状態で下方の鋼管杭Kの杭本体1の上端部に連結部材Nの下半部を内嵌合した後、図7の(a) に示すようにボルト12を杭本体側ボルト挿通孔7から連結部材側ボルト挿通孔8に挿通し、各ナット保持部9内に保持されているナット10に螺合して締め付けることにより連結部材Nを下方の鋼管杭Kの杭本体1の上端部に固定する。この後、上記連結部材Nの上半部に、上方の鋼管杭Kの杭本体1の下端部を外嵌合し、上方の鋼管杭Kの杭本体1下端部のボルト挿通孔7から連結部材側ボルト挿通孔8に挿通して、ナット保持部9内に保持されているナット10に螺合して締め付けることにより、上方の鋼管杭Kの杭本体1の下端部を連結部材Nの上半部に連結し、鋼管杭Kの杭本体1と下方の鋼管杭Kの杭本体1との端部どうしを連結する。   In this state, after fitting the lower half of the connecting member N into the upper end of the pile body 1 of the lower steel pipe pile K, the bolt 12 is inserted into the pile body side bolt insertion hole 7 as shown in FIG. Are inserted into the connecting member side bolt insertion holes 8 and screwed into the nuts 10 held in the nut holding portions 9 to tighten the connecting members N to the upper end portion of the pile body 1 of the lower steel pipe pile K. Fix it. Then, the lower end part of the pile main body 1 of the upper steel pipe pile K is externally fitted to the upper half part of the connecting member N, and the connecting member is inserted from the bolt insertion hole 7 at the lower end part of the pile main body 1 of the upper steel pipe pile K. The lower end portion of the pile body 1 of the upper steel pipe pile K is connected to the upper half of the connecting member N by being inserted into the side bolt insertion hole 8 and screwed into the nut 10 held in the nut holding portion 9 and tightened. The ends of the pile main body 1 of the steel pipe pile K and the pile main body 1 of the lower steel pipe pile K are connected to each other.

上記のように連結部材Nの上端部及び下端部の夫々内周縁に沿って補強用内向きフランジ部13を設けたことにより、ボルト挿通孔8の穿設されている連結部材Nの連結端部の強度が補強されるから、この連結部材Nが杭本体1の連結端部とボルト接合して鋼管杭Kとして使用する時に相当な剪断力が作用しても、連結部材Nのボルト挿通孔8から破損を生じるようなおそれがなく、鋼構造設計基準にも適合可能となる。因みに、このような補強用内向きフランジ部13を設けなければ、上記剪断力に対応するためにボルト挿通孔8から連結部材N6の夫々上下端までの長さを十分長くしたり、連結部材Nの肉厚を十分厚くする必要があるが、フランジ部13を設けることによって、連結部材Nの肉厚をできるだけ薄く、また連結部材Nの長さをできるだけ短くできるから、ヘッド本体3の重量を軽減できる。   As described above, the reinforcing inward flange portion 13 is provided along the inner peripheral edge of each of the upper end portion and the lower end portion of the connection member N, whereby the connection end portion of the connection member N in which the bolt insertion hole 8 is formed. Therefore, even if a considerable shearing force is applied when the connecting member N is bolted to the connecting end of the pile body 1 and used as a steel pipe pile K, the bolt insertion hole 8 of the connecting member N is strengthened. Therefore, the steel structure design standards can be met. Incidentally, if such an inward flange portion 13 for reinforcement is not provided, the length from the bolt insertion hole 8 to the upper and lower ends of each of the connecting members N6 is sufficiently increased in order to cope with the shearing force, or the connecting member N However, by providing the flange portion 13, the thickness of the connecting member N can be made as thin as possible and the length of the connecting member N can be made as short as possible. it can.

また、連結部材内周面の上端部側ナット保持部9と下端部側ナット保持部9とを上下対称状に設け、上端部側フランジ部13には各上端部側ナット保持部9にナット10を挿入するためのナット挿入口14を、また下端部側フランジ部13には各下端部側ナット保持部9にナット10を挿入するためのナット挿入口14を夫々設けているから、連結部材Nの両端部を上下区別することなく任意に使用できて、連結作業が容易となる。   Further, the upper end side nut holding portion 9 and the lower end side nut holding portion 9 on the inner peripheral surface of the connecting member are provided in a vertically symmetrical manner, and the upper end side flange holding portion 13 is provided with a nut 10 on each upper end side nut holding portion 9. The nut insertion port 14 for inserting the nut 10 and the nut insertion port 14 for inserting the nut 10 in each lower end side nut holding portion 9 are provided in the lower end side flange portion 13, respectively. Can be used arbitrarily without distinguishing between the upper and lower ends, and the connecting operation becomes easy.

図14は、更に他の実施形態による連結部材Mの縦断面図である。この連結部材Mは、円筒状本体20の上基筒部21の上端部内周縁に沿って補強用の内向きフランジ部13を突設すると共に、下基筒部22の下端部内周縁に沿って補強用の内向きフランジ部13を突設してなるもので、上基筒部側ナット保持部9と下基筒部側ナット保持部9とは、上下対称ではないが、上下が互いに逆方向に配設され、上基筒部側フランジ部13には各上基筒部側ナット保持部9にナット10を挿入するためのナット挿入口14が設けられ、また下基筒部側フランジ部13には詳細な図示は省略するが、各下基筒部側ナット保持部9にナット10を挿入するためのナット挿入口14が夫々設けられている。この連結部材Mの使用による杭本体1,1の連結要領は、連結部材Nによる連結要領と同様である。   FIG. 14 is a longitudinal sectional view of a connecting member M according to still another embodiment. The connecting member M projects the inward flange portion 13 for reinforcement along the inner peripheral edge of the upper end of the upper base tube portion 21 of the cylindrical body 20 and reinforces along the inner periphery of the lower end portion of the lower base tube portion 22. The upper base cylinder part side nut holding part 9 and the lower base cylinder part side nut holding part 9 are not vertically symmetrical, but the top and bottom are opposite to each other. The upper base tube portion side flange portion 13 is provided with a nut insertion port 14 for inserting the nut 10 into each upper base tube portion side nut holding portion 9, and the lower base tube portion side flange portion 13 is provided with Although detailed illustration is omitted, nut insertion ports 14 for inserting the nuts 10 are provided in the lower base tube portion side nut holding portions 9 respectively. The connection procedure of the pile main bodies 1 and 1 by using the connection member M is the same as the connection procedure by the connection member N.

この図14に示すように円筒状本体20の上基筒部21の上端部内周縁に沿って補強用の内向きフランジ部13を突設すると共に、下基筒部22の下端部内周縁に沿って補強用の内向きフランジ部13を設けることにより、ボルト挿通孔8の穿設されている上下基筒部21,22の強度が補強され、連結部材Mの肉厚をできるだけ薄く、また連結部材Mの長さをできるだけ短くできて、連結部材Mの重量の軽減を図ることができる。また、上基筒部側ナット保持部9と下基筒部側ナット保持部9とは上下が互いに逆方向に設けられ、上基筒部側フランジ部13には各上基筒部側ナット保持部9にナット10を挿入するためのナット挿入口14が、また下基筒部側フランジ部13には各下基筒部側ナット保持部9にナット10を挿入するためのナット挿入口14が夫々設けてあるから、連結部材Mの両端部を上下区別することなく任意に使用できることになって、連結作業が容易となる。   As shown in FIG. 14, a reinforcing inward flange portion 13 is projected along the upper peripheral edge of the upper base cylinder portion 21 of the cylindrical main body 20, and along the lower peripheral edge of the lower base cylinder portion 22. By providing the inward flange portion 13 for reinforcement, the strength of the upper and lower base tube portions 21 and 22 in which the bolt insertion holes 8 are drilled is reinforced, and the thickness of the connecting member M is made as thin as possible. Can be shortened as much as possible, and the weight of the connecting member M can be reduced. Further, the upper base tube portion side nut holding portion 9 and the lower base tube portion side nut holding portion 9 are provided in opposite directions, and the upper base tube portion side flange portion 13 holds each upper base tube portion side nut holding portion. A nut insertion port 14 for inserting the nut 10 into the portion 9 is provided, and a nut insertion port 14 for inserting the nut 10 into each lower base cylinder portion side nut holding portion 9 is provided at the lower base tube portion side flange portion 13. Since each is provided, both end portions of the connecting member M can be arbitrarily used without distinguishing between the upper and lower sides, and the connecting operation is facilitated.

本発明の実施形態による連結部材を示す斜視図である。It is a perspective view which shows the connection member by embodiment of this invention. (a) は同連結部材の正面図、(b) は平面図、(c) は底面図である。(a) is a front view of the connecting member, (b) is a plan view, and (c) is a bottom view. 同連結部材の縦断面図である。It is a longitudinal cross-sectional view of the connection member. (a) は図2の(b) の矢印Xで示す部分の拡大図、(b) は図3の矢印Yで示す部分の拡大図、(c) は(a) のZ−Z線断面図である。(a) is an enlarged view of a portion indicated by an arrow X in FIG. 2 (b), (b) is an enlarged view of a portion indicated by an arrow Y in FIG. 3, and (c) is a sectional view taken along line ZZ in (a). It is. 下方の杭本体の上端部に上方の杭本体の下端部を連結している状態を示す説明図である。It is explanatory drawing which shows the state which has connected the lower end part of the upper pile main body to the upper end part of the lower pile main body. 両杭本体を連結し終えた状態の説明図である。It is explanatory drawing of the state which finished connecting both pile main bodies. (a) はボルトを杭本体側ボルト挿通孔から連結部材側ボルト挿通孔を通ってナット受け壁部内のナットにねじ込もうとしている状態を示す平面図、(b) は(a) のV−V線断面図である。(a) is a plan view showing a state in which a bolt is about to be screwed into a nut in a nut receiving wall portion from a pile body side bolt insertion hole through a connecting member side bolt insertion hole, and (b) is a V- It is V line sectional drawing. 図6のW−W線拡大断面図である。It is the WW line expanded sectional view of FIG. 多翼型鋼管杭の実施形態を示す斜視図である。It is a perspective view showing an embodiment of a multi-blade type steel pipe pile. (a) 及び(b) は多翼型鋼管杭の製造に使用する連結部材を示す斜視図である。(a) And (b) is a perspective view which shows the connection member used for manufacture of a multiblade-type steel pipe pile. 多翼型鋼管杭を製造する場合の組み付け方法を示す説明図である。It is explanatory drawing which shows the assembly | attachment method in the case of manufacturing a multiblade type steel pipe pile. 本発明の他の実施形態による連結部材を示すもので、(a) 連結部材の正面図、(b) は平面図、(c) は(a) のP−P線断面図、(d) は底面図、(e) は絵のQ−Q線断面図である。FIG. 6 shows a connecting member according to another embodiment of the present invention, in which (a) is a front view of the connecting member, (b) is a plan view, (c) is a sectional view taken along the line P-P of (a), and (d) is Bottom view, (e) is a cross-sectional view taken along line QQ of the picture. (a) は連結部材及び塞ぎリングを示す斜視図、(b) は塞ぎリングの取付方法を示す説明斜視図である。(a) is a perspective view showing a connecting member and a closing ring, (b) is an explanatory perspective view showing a mounting method of the closing ring. 更に他の実施形態による連結部材の縦断面図である。It is a longitudinal cross-sectional view of the connection member by other embodiment.

符号の説明Explanation of symbols

K 鋼管杭
N 連結部材
M 連結部材
1 杭本体
7 杭本体側ボルト挿通孔
8 連結部材側ボルト挿通孔
9 ナット保持部
10 ナット
12 ボルト
13 補強用の内向きフランジ部
14 ナット挿入口
K steel pipe pile N connecting member M connecting member 1 pile main body 7 pile main body side bolt insertion hole 8 connecting member side bolt insertion hole 9 nut holding portion 10 nut 12 bolt 13 reinforcing inward flange portion 14 nut insertion port

Claims (9)

下方の杭本体の上端部に上方の杭本体の下端部を連結するにあたり、下半部が下方の杭本体上端部に内嵌合され且つ上半部が上方の杭本体下端部に内嵌合される円筒状の連結部材を設け、下方の杭本体の上端部及び上方の杭本体の下端部には周方向一定間隔おきにボルト挿通孔を設け、連結部材の上端部側及び下端部側には、連結部材を杭本体の連結端部に内嵌合した時に杭本体側ボルト挿通孔と合致する位置にボルト挿通孔を設けると共に、連結部材の内周面側には、各連結部材側ボルト挿通孔と軸方向に対向する位置でナットを回転不能にして且つ前後移動不能に保持するナット保持部を設けておいて、連結部材の下半部を下方の杭本体上端部に内嵌合して、ボルトを杭本体側ボルト挿通孔から連結部材側ボルト挿通孔に挿通してナット保持部内に保持されたナットに螺合することにより、連結部材を下方の杭本体上端部に固定し、この連結部材の上半部を上方の杭本体下端部に内嵌合して、ボルトを杭本体側ボルト挿通孔から連結部材側ボルト挿通孔に挿通してナット保持部内に保持されたナットに螺合することにより、連結部材を上方の杭本体下端部に固定して、両杭本体を一体的に連結してなる鋼管杭の杭本体連結構造。   When connecting the lower end of the upper pile body to the upper end of the lower pile body, the lower half is internally fitted to the upper end of the lower pile body and the upper half is internally fitted to the lower end of the upper pile body. A cylindrical connecting member is provided, bolt insertion holes are provided at regular intervals in the upper end of the lower pile body and the lower end of the upper pile body, and the upper end side and the lower end side of the connecting member are provided. Is provided with a bolt insertion hole at a position that matches the pile body side bolt insertion hole when the connection member is internally fitted to the connection end of the pile body, and each connection member side bolt is provided on the inner peripheral surface side of the connection member. A nut holding part is provided to make the nut non-rotatable and non-movable back and forth at a position facing the insertion hole in the axial direction, and the lower half of the connecting member is fitted into the upper end of the lower pile body. The bolt is inserted from the pile body side bolt insertion hole to the connecting member side bolt insertion hole, and the nut The connecting member is fixed to the upper end of the lower pile body by screwing into the nut held in the holding portion, the upper half of the connecting member is internally fitted to the lower end of the upper pile body, and the bolt is The pile body side bolt insertion hole is inserted into the connection member side bolt insertion hole and screwed into the nut held in the nut holding portion, thereby fixing the connection member to the lower end of the upper pile body, Pile body connection structure of steel pipe piles that are integrally connected. 前記各ナット保持部は、連結部材の内周面に、ボルト挿通孔を中心として左右対称位置に突設された両側一対のアーム壁からなり、各アーム壁は、縦壁部と、縦壁部の下端から内向きに突出するナット受け壁部と、縦壁部の前端から内向きに突出するナット抜け止め壁部とからなるもので、ナットは連結部材の上方よりこのナット保持部に挿入されるようになっている請求項1に記載の鋼管杭の杭本体連結構造。   Each nut holding part is composed of a pair of arm walls on both sides projecting from the inner peripheral surface of the connecting member at a bilaterally symmetrical position around the bolt insertion hole, each arm wall comprising a vertical wall part and a vertical wall part A nut receiving wall portion projecting inward from the lower end of the nut and a nut retaining wall portion projecting inward from the front end of the vertical wall portion. The nut is inserted into the nut holding portion from above the connecting member. The pile main body connection structure of the steel pipe pile of Claim 1 which has become. 前記連結部材の上端部及び下端部の夫々内周縁に沿って補強用の内向きフランジ部を突設し、連結部材内周面の上端部側ナット保持部と下端部側ナット保持部とは互いに上下逆方向に設け、上端部側フランジ部には各上端部側ナット保持部にナットを挿入するためのナット挿入口を、また下端部側フランジ部には各下端部側ナット保持部にナットを挿入するためのナット挿入口を夫々設けてなる請求項1又は2に記載の鋼管杭の杭本体連結構造。   Reinforcing inward flange portions project along the inner peripheral edges of the upper end portion and the lower end portion of the connecting member, and the upper end side nut holding portion and the lower end side nut holding portion of the inner peripheral surface of the connecting member are mutually connected. Provided in the upside down direction, the upper end side flange is provided with a nut insertion port for inserting a nut into each upper end side nut holding part, and the lower end side flange part is provided with a nut at each lower end side nut holding part. The pile main body connection structure of a steel pipe pile according to claim 1 or 2, wherein a nut insertion opening for insertion is provided. 下方の杭本体の上端部に上方の杭本体の下端部を連結するにあたり、杭本体の外径と同じ外径を有する円筒状本体の上下端部に、外径が杭本体の内径より小さく上方の杭本体の下端部及び下方の杭本体の上端部が夫々外嵌合する上下基筒部を形成してなる円筒状の連結部材を設け、下方の杭本体の上端部及び上方の杭本体の下端部には周方向一定間隔おきにボルト挿通孔を設け、連結部材の上下各基筒部には、基筒部に杭本体の連結端部が外嵌合した時に杭本体側ボルト挿通孔と合致する位置にボルト挿通孔を設けると共に、各基筒部の内周面側に、各基筒部側ボルト挿通孔と軸方向に対向する位置でナットを回転不能にして且つ前後移動不能に保持するナット保持部を設けておいて、下基筒部を下方の杭本体の上端部に内嵌合して、ボルトを杭本体側ボルト挿通孔から基筒部側ボルト挿通孔に挿通してナット保持部内に保持されたナットに螺合することにより、連結部材を下方の杭本体上端部に固定し、上基筒部を上方の杭本体下端部に内嵌合して、ボルトを杭本体側ボルト挿通孔から基筒部側ボルト挿通孔に挿通してナット保持部内に保持されたナットに螺合することにより、上基筒部を上方の杭本体下端部に固定して、両杭本体を一体的に連結してなる鋼管杭の杭本体連結構造。   When connecting the lower end of the upper pile body to the upper end of the lower pile body, the outer diameter of the cylindrical body having the same outer diameter as the outer diameter of the pile body is smaller than the inner diameter of the pile body. Provided with a cylindrical connecting member that forms an upper and lower base cylinder portion in which the lower end portion of the pile body and the upper end portion of the lower pile body are respectively externally fitted, and the upper end portion of the lower pile body and the upper pile body Bolt insertion holes are provided in the lower end portion at regular intervals in the circumferential direction, and the upper and lower base tube portions of the connecting member are connected to the pile body side bolt insertion holes when the connecting end portion of the pile body is externally fitted to the base tube portion. Bolt insertion holes are provided at the matching positions, and the nuts are made non-rotatable and non-movable back and forth on the inner peripheral surface side of each base cylinder part at positions facing each base cylinder part side bolt insertion hole in the axial direction. The nut holding part to be installed is provided, and the lower base cylinder part is internally fitted to the upper end part of the lower pile body, and the bolt The connecting member is fixed to the upper end of the lower pile body by inserting the pile body side bolt insertion hole into the base cylinder side bolt insertion hole and screwing into the nut held in the nut holding portion, and the upper base cylinder portion Is inserted into the lower end of the upper pile body, the bolt is inserted from the bolt body side bolt insertion hole to the base cylinder side bolt insertion hole, and screwed into the nut held in the nut holding part. A pile body connection structure for steel pipe piles, in which the base cylinder portion is fixed to the upper lower end portion of the pile body, and both pile bodies are integrally connected. 前記連結部材の円筒状本体には螺旋翼を突設してなる請求項4に記載の鋼管杭の杭本体連結構造。   The pile main body connection structure of a steel pipe pile according to claim 4, wherein a spiral wing projects from the cylindrical main body of the connection member. 前記各ナット保持部は、連結部材の内周面に、ボルト挿通孔を中心として左右対称位置に突設された両側一対のアーム壁からなり、各アーム壁は、縦壁部と、縦壁部の下端から内向きに突出するナット受け壁部と、縦壁部の前端から内向きに突出するナット抜け止め壁部とからなるもので、ナットは連結部材の上方よりこのナット保持部に挿入されるようになっている請求項4又は5に記載の鋼管杭の杭本体連結構造。   Each nut holding part is composed of a pair of arm walls on both sides projecting from the inner peripheral surface of the connecting member at a bilaterally symmetrical position around the bolt insertion hole, each arm wall comprising a vertical wall part and a vertical wall part A nut receiving wall portion projecting inward from the lower end of the nut and a nut retaining wall portion projecting inward from the front end of the vertical wall portion. The nut is inserted into the nut holding portion from above the connecting member. The pile main body connection structure of the steel pipe pile according to claim 4 or 5. 前記上基筒部の上端部内周縁に沿って補強用の内向きフランジ部を突設すると共に、下基筒部の下端部内周縁に沿って補強用の内向きフランジ部を突設し、上基筒部側ナット保持部と下基筒部側ナット保持部とは互いに上下逆方向に設け、上基筒部側フランジ部には各上基筒部6側ナット保持部にナットを挿入するためのナット挿入口を、また下基筒部側フランジ部には各下基筒部側ナット保持部にナットを挿入するためのナット挿入口を夫々設けてなる請求項4〜6に記載の鋼管杭の杭本体連結構造。   A reinforcing inward flange portion protrudes along the inner peripheral edge of the upper base portion of the upper base tube portion, and an inward flange portion for reinforcement protrudes along the inner peripheral edge of the lower end portion of the lower base tube portion. The cylinder part side nut holding part and the lower base cylinder part side nut holding part are provided in opposite directions, and the upper base cylinder part side flange part is for inserting a nut into each upper base cylinder part 6 side nut holding part. The steel pipe pile according to any one of claims 4 to 6, wherein a nut insertion port is provided, and a nut insertion port for inserting a nut into each lower base cylinder part side nut holding part is provided in the lower base cylinder part side flange part. Pile body connection structure. 前記各ナット保持部の各アーム壁を形成するナット受け壁部は、その上面が水平面に対し約30°の傾斜面に形成されている請求項2又は6に記載の鋼管杭の杭本体連結構造。   The pile body connecting structure for steel pipe piles according to claim 2 or 6, wherein the nut receiving wall portion forming each arm wall of each nut holding portion has an upper surface formed on an inclined surface of about 30 ° with respect to a horizontal plane. . 前記連結部材は鋳鋼又は鋳鉄からなる一体成形鋳造物である請求項1〜8の何れかに記載の鋼管杭の杭本体連結構造。   The pile connection structure for a steel pipe pile according to any one of claims 1 to 8, wherein the connection member is an integrally formed casting made of cast steel or cast iron.
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JP2012077537A (en) * 2010-10-04 2012-04-19 Sumikin Bussan Co Ltd Connection structure of steel pipe pile
CN103572751A (en) * 2013-11-11 2014-02-12 洪求耀 Screw-in type steel pipe pile and forming technology of screw-in type steel pipe pile
JP2014169545A (en) * 2013-03-01 2014-09-18 Nippon Steel & Sumikin Bussan Corp Connecting structure of steel pipe pile
JP2020041276A (en) * 2018-09-06 2020-03-19 日本製鉄株式会社 Pile joint and steel pipe pile

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JP5627810B1 (en) * 2014-04-10 2014-11-19 森川産業株式会社 Manufacturing method of pile tip with joint for steel pipe pile

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JP2012077537A (en) * 2010-10-04 2012-04-19 Sumikin Bussan Co Ltd Connection structure of steel pipe pile
JP2014169545A (en) * 2013-03-01 2014-09-18 Nippon Steel & Sumikin Bussan Corp Connecting structure of steel pipe pile
CN103572751A (en) * 2013-11-11 2014-02-12 洪求耀 Screw-in type steel pipe pile and forming technology of screw-in type steel pipe pile
JP2020041276A (en) * 2018-09-06 2020-03-19 日本製鉄株式会社 Pile joint and steel pipe pile

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