JP6893614B2 - Steel pipe joint structure - Google Patents
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- JP6893614B2 JP6893614B2 JP2017092667A JP2017092667A JP6893614B2 JP 6893614 B2 JP6893614 B2 JP 6893614B2 JP 2017092667 A JP2017092667 A JP 2017092667A JP 2017092667 A JP2017092667 A JP 2017092667A JP 6893614 B2 JP6893614 B2 JP 6893614B2
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Description
本発明は、鋼管杭や杭状地盤補強体の上側鋼管杭と下側鋼管杭を接合する鋼管杭継手構造に関するものである。 The present invention relates to a steel pipe pile joint structure for joining an upper steel pipe pile and a lower steel pipe pile of a steel pipe pile or a pile-shaped ground reinforcement body.
軟弱地盤を補強するため、鋼管杭を地中深く打込む場合が増えてきている。鋼管杭の継ぎ足しは、鋼管端部同士の溶接による連結や現場溶接を必要とせずより簡単に鋼管杭の継ぎ足しのできる機械式継手を用いて接合されている。 In order to reinforce soft ground, steel pipe piles are increasingly driven deep into the ground. The replenishment of steel pipe piles is joined by using a mechanical joint that can more easily replenish steel pipe piles without the need for connection by welding between the ends of steel pipes or on-site welding.
現場での溶接連結は手間が掛かる上、現場環境や天候に左右され品質が安定しないなどの問題がある。また、従来の機械式継手では施工時に発生する圧縮、ねじり、引抜きおよび曲げ方向の応力荷重など全てに対応している製品が少なく、現場での組み立て時間も掛かっている上に価格も高かった。 Welding connection at the site is troublesome, and there are problems such as unstable quality due to the environment and weather at the site. In addition, there are few conventional mechanical joints that can handle all of the stress loads in the compression, twisting, pulling, and bending directions that occur during construction, and it takes time to assemble on-site and the price is high.
特許文献1(特開2016−050606号公報)は、下側鋼管杭と上側鋼管杭を連通する円錐台形状のロック穴を6カ所持つ、ロック穴に対応した円錐台形状のテーパロックを通し、このテーパロックをボルトとワッシャおよびナットで固定する方式の鋼管杭継手構造を開示している。 Patent Document 1 (Japanese Unexamined Patent Publication No. 2016-05060) passes through a truncated cone-shaped taper lock corresponding to a lock hole having six truncated cone-shaped lock holes communicating the lower steel pipe pile and the upper steel pipe pile. A steel pipe pile joint structure in which this taper lock is fixed with bolts, washers and nuts is disclosed.
特許文献2(特開2006−144415号公報)は、従来よりも曲げ力と共にひねり力に対しても強い抗力を発揮することを課題とし、第1の鋼管杭の後端と第2の鋼管杭の前端とを繋ぐ鋼管杭継手において、第1の鋼管杭継手が第2の鋼管杭継手に挿入され、径方向に互いに直交する2方向の各対向する位置に設けられた2対の貫通孔があり、この貫通孔に座金部材を取り付け、それぞれ対向する座金部材同士を1本以上の通しボルトで十字状に固定される方式の鋼管杭継手を開示する。 Patent Document 2 (Japanese Unexamined Patent Publication No. 2006-144415) has an object of exerting a stronger resistance force against a twisting force as well as a bending force than before, and a rear end of a first steel pipe pile and a second steel pipe pile. In the steel pipe pile joint connecting the front end of the steel pipe pile joint, the first steel pipe pile joint is inserted into the second steel pipe pile joint, and two pairs of through holes provided at opposite positions in two directions orthogonal to each other in the radial direction are provided. There is disclosed a steel pipe pile joint in which a washer member is attached to this through hole and the washer members facing each other are fixed in a cross shape with one or more through bolts.
特許文献3(特開2005−105618号公報)は、上杭と下杭とを容易にジョイントでき、上杭への打込み正回転と引抜き逆回転のいずれをも下杭に確実に伝えることができ、加えて、曲げに対する上杭と下杭のジョイント部の剛性をしっかりとしたものを課題とし、雌継ぎ手に円形ガイド孔部と太鼓状断面の回転係合雌孔部を備え、雄継ぎ手に太鼓状断面の回転係合雄部と外周円形雄部を備え、回転係合雄部と回転係合雌孔部及び円形ガイド孔部と外周円形雄部が嵌合され、その嵌合状態でピンが差し込まれるようになされている回転圧入杭における上杭と下杭のジョイント構造を開示している。 In Patent Document 3 (Japanese Unexamined Patent Publication No. 2005-105618 ), the upper pile and the lower pile can be easily jointed, and both the forward rotation of driving into the upper pile and the reverse rotation of pulling out can be reliably transmitted to the lower pile. In addition, the challenge is to ensure the rigidity of the joint between the upper and lower piles against bending, and the female joint is equipped with a circular guide hole and a rotary engaging female hole with a drum-shaped cross section, and the male joint is a drum. It is provided with a rotary engagement male part and an outer circular male part having a similar cross section, and the rotary engagement male part and the rotary engagement female hole part and the circular guide hole part and the outer circular male part are fitted, and the pin is fitted in the fitted state. The joint structure of the upper pile and the lower pile in the rotary press-fitting pile that is made to be inserted is disclosed.
上述した継手機構では、現場溶接を必要としないため接合部の品質管理も容易でその施工時間を短縮することができるという効果も有しているが、施工における圧縮、ねじり、引抜きおよび曲げ応力など全ての負荷荷重に対して十分対応していると言いがたい点があり、特に正逆の繰返しねじり回転の耐久性には弱点がある。 Since the above-mentioned joint mechanism does not require on-site welding, it has the effect of facilitating quality control of the joint and shortening the construction time. It is hard to say that it is sufficiently compatible with all loads, and in particular, it has a weakness in the durability of repeated torsional rotation in the forward and reverse directions.
このため本発明は、短時間での着脱が可能で、上側鋼管杭の圧入荷重や正逆回転トルクを下側鋼管杭に、確実に伝達可能な構造を有する上、施工時などに発生する曲げ応力や引抜き応力に十分対応した鋼管杭継手機構を提供することを課題の一つとする。 Therefore, the present invention has a structure that can be attached and detached in a short time, can reliably transmit the press-fitting load and forward / reverse rotation torque of the upper steel pipe pile to the lower steel pipe pile, and bends that occur during construction. One of the issues is to provide a steel pipe pile joint mechanism that sufficiently copes with stress and pull-out stress.
上記の課題を解決するため、上側鋼管杭の下端用の内面継手(内周側継手)を下側鋼管杭の外面継手(外周側継手)に挿入されたときにストッパの役割と上下の接触面が密着接触出来る場所として内面継手につば部を作り、このつば部が平行キーの差し込み位置を気にすることなく外面継手の上部端面に被さるまで差し込むことが出来る上に上側鋼管杭の圧入荷重が下側鋼管杭にロス無く伝達されるようになっている。 In order to solve the above problems, when the inner surface joint (inner peripheral side joint) for the lower end of the upper steel pipe pile is inserted into the outer surface joint (outer peripheral side joint) of the lower steel pipe pile, the role of the stopper and the upper and lower contact surfaces A brim is made in the inner joint as a place where can be in close contact, and it can be inserted until this brim covers the upper end face of the outer joint without worrying about the insertion position of the parallel key, and the press-fitting load of the upper steel pipe pile is applied. It has become so that is without loss transferred to the lower steel pipe pile.
内面継手の外側と外面継手の内側には、凹凸溝が付けられている。この凹凸溝は内面継手を外面継手に差し込むときにガイドの役割となり継手同士の差込みも容易に行うことができ、施工時間も大幅に短縮可能となった。また、正・逆回転トルクの伝達では凹凸溝の端面が正・逆回転時に確実に接触してせん断面と支圧面となり上側鋼管杭の正・逆回転トルク荷重が下側鋼管杭に確実に伝達される。 Concavo-convex grooves are provided on the outside of the inner surface joint and the inside of the outer surface joint. This uneven groove acts as a guide when the inner surface joint is inserted into the outer surface joint, and the joints can be easily inserted into each other, and the construction time can be significantly shortened. In addition, in the transmission of forward / reverse rotation torque, the end faces of the concave-convex groove surely come into contact with each other during forward / reverse rotation to form a shear surface and a bearing surface, and the forward / reverse rotation torque load of the upper steel pipe pile is reliably transmitted to the lower steel pipe pile. Will be done .
また、内外面継手の凹凸溝端面が正逆回転時に確実に接触してせん断面と支圧面となる様に下側鋼管杭下端の外面継手に周方向が凹凸境界面となるような平行キー差し込み孔を開けてある。 In addition, a parallel key is inserted into the outer surface joint at the lower end of the lower steel pipe pile so that the concavo-convex groove end surface of the inner and outer surface joints makes a reliable contact during forward and reverse rotation and becomes a shear surface and a bearing surface. There is a hole.
内面継手の広幅凸部に平行キー溝と雌ねじ孔を、外面継手の広幅凹部に長方形の平行キー差し込み孔を加工し、平行キーを差し込み、六角穴付きボルトで内面継手に固定できるようにした。 A parallel key groove and a female screw hole were machined in the wide convex part of the inner surface joint, and a rectangular parallel key insertion hole was machined in the wide concave part of the outer surface joint, and the parallel key was inserted so that it could be fixed to the inner surface joint with a hexagon socket head bolt.
本発明により、上側鋼管杭に溶接された内面継手が下側鋼管杭に溶接された外面面継手のつば部や凹凸溝により短時間で取り付け、取り外しが出来る様になり、また上側鋼管杭から伝達される回転圧入荷重や回転トルク荷重をロスなく確実に下側鋼管杭の外面継手に伝達出来る様になった。 According to the present invention, the inner surface joint welded to the upper steel pipe pile can be attached and detached in a short time by the brim and the uneven groove of the outer surface joint welded to the lower steel pipe pile, and is transmitted from the upper steel pipe pile. It has become possible to reliably transmit the rotational press-fitting load and rotational torque load to the outer surface joint of the lower steel pipe pile without loss.
また、内面継手にボルトで固定された平行キーにより引抜き耐力や曲げ耐力が大幅に向上し、鋼管杭で使用する鋼管性能と同等程度の性能を有することができた。 In addition, the parallel key fixed to the inner surface joint with bolts greatly improved the pull-out strength and bending strength, and it was possible to have the same level of performance as the steel pipe performance used for steel pipe piles.
また、内面継手と外面継手が密着固定された構造でないため、地震振動などを吸収することができ、耐震性能の大幅な向上も期待できる In addition, since the inner surface joint and the outer surface joint are not closely fixed, they can absorb seismic vibrations and can be expected to significantly improve seismic performance.
図を用いて本発明に係る鋼管杭継手構造を説明する。The steel pipe pile joint structure according to the present invention will be described with reference to the drawings.
図1の右図は、上側鋼管杭の内面継手と下側鋼管杭の外面継手が工場溶接され現場で組み立てられるときのイメージである。 The right figure of FIG. 1 is an image when the inner surface joint of the upper steel pipe pile and the outer surface joint of the lower steel pipe pile are factory welded and assembled at the site.
右図は、内面継手(イ)、外面継手(ロ)を分離状態にした斜視図である。 The figure on the right is a perspective view in which the inner surface joint (a) and the outer surface joint (b) are separated.
内面継手(イ)の上部には、外面継手の上部端面3に載せるつば部1が付いており、このつば部と外面継手の上部端面3の接触により、上側鋼管杭の圧入荷重が下側鋼管杭に伝達されるとともに差し込みときのストッパの役割も果たしている。 A
内面継手の外側には幅の異なる6本の凹溝(凹部)6と凸溝(凸部)7が付いており、この凹溝6は外面継手の凸溝7に、凸溝7は外面継手の凹溝8に差し込まれ、両継手の溝端面5,9が接触して上側継手の回転トルクを下側鋼管杭に伝達する。
On the outside of the inner surface joint, there are 6 concave grooves (concave parts) 6 and convex grooves (convex parts) 7 having different widths. The
内面継手の広幅凸溝4には平行キー(ロ)1を差し込むキー溝があり、この溝の中心には平行キーをボルト固定するためのネジ孔2が加工されている。外面継手の広幅凹溝には平行キーを挿入する平行キー差込み孔4があり、内面継手を外面継手に差し込むと外面継手の平行キー差込み孔が内面継手のキー溝孔に重なる仕組みとなっている。 The
外面継手の差し込み孔に挿入された平行キー(ロ)1は、内面継手のキー溝3に差し込まれ六角穴付きボルト2で内面継手に加工されている雌ねじ部2に締め付け固定される。外面継手に挿入された平行キーは外面継手の表面に飛び出さない長さとなっている。また平行キーに差し込まれた六角穴付きボルト2の頭部も平行キーのボルト頭部収納孔5に収まる構造となっている。これは鋼管杭の周辺摩擦係数を阻害しない構造としているためである。 The parallel key (b) 1 inserted into the insertion hole of the outer surface joint is inserted into the
外面継手のキー孔(開口)は内面継手のキー溝よりも周方向に広く開けられた長方形の開口部である。これは、上側鋼管杭に溶接された内面継手にボルトで固定された平行キーが鋼管杭の回転に合わせて左右に動き、内面継手と外面継手の凹凸溝の端面が確実に接触して平行キーに回転トルク荷重が負荷しない様にするためである。 Outer surface joint keyhole (opening) is opening widely drilled rectangular circumferential direction than the keyway of the inner surface fitting. This parallel key that is bolted to the inner surface fitting which is welded to the upper steel pipe pile is a movement to the left and right in accordance with the rotation of the steel pipe pile, parallel key end face of uneven grooves in the inner surface fitting and outer joint with reliable contact This is to prevent the rotational torque load from being applied.
内面継手の端面には溶接開先8が外面継手の端面には溶接開先6が加工されている。 A
図2は内面および外面継手を構成する部品イメージと継手を組み合わせた時の継手外面と内部の概念を模式化した図である。この継手の組み立てでは、未経験の作業者でも30〜60秒ほどで組み立てを完了出来る。また引き抜いた後でも平行キーが外面継手を締め付けていないため簡単に取り外すことができる。 FIG. 2 is a diagram illustrating the concept of the outer surface and the inner surface of the joint when the joint is combined with the image of the parts constituting the inner surface and the outer surface joint. In assembling this joint, even an inexperienced worker can complete the assembly in about 30 to 60 seconds. Also, even after pulling out, the parallel key does not tighten the outer joint, so it can be easily removed.
図3は内面継手から伝わるねじりトルク荷重が外面継手に伝達されるイメージ図である。内面継手の溶接された上側鋼管杭の回転トルク荷重が内面および外面継手の凹凸溝の端面接触により伝達されるイメージである。また、写真の様に外面継手の平行キー差し込み孔は内面継手のキー溝より広く加工されており内面継手と外面継手の端面が確実に接触出来る様になっている。 FIG. 3 is an image diagram in which the torsional torque load transmitted from the inner surface joint is transmitted to the outer surface joint. This is an image in which the rotational torque load of the welded upper steel pipe pile of the inner surface joint is transmitted by the end face contact of the uneven groove of the inner surface joint and the outer surface joint. Further, as shown in the photograph, the parallel key insertion hole of the outer surface joint is wider than the key groove of the inner surface joint so that the end surface of the inner surface joint and the end surface of the outer surface joint can be reliably contacted.
(イ)1内面継手のつばリング部
(イ)2内面継手の雌ねじ部
(イ)3内面継手の平行キー溝孔
(イ)4内面継手の広幅凸溝
(イ)5内面継手の凹凸溝端面
(イ)6内面継手の凹溝
(イ)7内面継手の凸溝
(イ)8内面継手の溶接開先加工部
(ロ)1平行キー
(ロ)2六角穴付きボルト
(ロ)5ボルト頭部収納孔
(ロ)3外面継手の頭部端面
(ロ)4外面継手の平行キー差込み孔
(ロ)6外面継手の溶接開先加工部
(ロ)7外面継手の凸溝
(ロ)8外面継手の凹溝(B) 1 Brim ring part of the inner surface joint (B) 2 Female thread part of the inner surface joint (B) 3 Parallel keyway hole of the inner surface joint (B) 4 Wide convex groove of the inner surface joint (B) 5 Concavo-convex groove end surface of the inner surface joint (B) 6 Concave groove of inner surface joint (B) 7 Concave groove of inner surface joint (B) 8 Weld groove machined part of inner surface joint (b) 1 Parallel key (b) 2 Hexagon socket head bolt (b) 5 bolt head Part storage hole (b) 3 Head end face of outer surface joint (b) 4 Parallel key insertion hole of outer surface joint (b) 6 Weld groove processing part of outer surface joint (b) 7 Convex groove of outer surface joint (b) 8 Outer surface Recessed groove in the fitting
Claims (4)
上側鋼管の下端部に取り付けられて使用される環状の内周側継手であって、該内周側継手の外周面から径方向外側へ突出した複数の凸部が該内周側継手の軸方向に延びるように形成されており、該複数の凸部のうちの少なくとも1つにキー溝が形成されているとともに、該キー溝内において該内周側継手を径方向に貫く第1のボルト受け孔が形成されており、該内周側継手の上面の周縁に沿ってリング状のつば部が形成されている、内周側継手と、
下側鋼管の上端部に取り付けられて使用される環状の外周側継手であって、該外周側継手の内周面において上記複数の凸部と噛合し得る複数の凹部が該外周側継手の軸方向に延びるように形成されており、該複数の凹部のうちの少なくとも1つにおいて該外周側継手を径方向に貫く開口が形成されている、外周側継手と、
上記キー溝に嵌合し得る形状に形成された1つ又は複数の平行キーであって、該平行キー内を貫く第2のボルト受け孔が形成されている、1つ又は複数の平行キーと、
上記開口を通された上記平行キーの先端部分が上記キー溝内に嵌合している状態で、第2のボルト受け孔を通して第1のボルト受け孔に固定することができるように構成されたボルトであって、第2のボルト受け孔の深さ寸法よりも大きな長さ寸法を有するボルトと、
を備え、
内周側継手が外周側継手に対して軸方向に動かされて内周側に挿入されたときに、上記複数の凸部と上記複数の凹部とが噛合するとともに、上記キー溝と上記開口とがこれらの継手の径方向に整列するように構成されていることを特徴とする、鋼管継手構造。 In the steel pipe joint structure for connecting the upper steel pipe and the lower steel pipe in the axial direction,
An annular inner peripheral side joint used by being attached to the lower end of the upper steel pipe, and a plurality of convex portions protruding outward in the radial direction from the outer peripheral surface of the inner peripheral side joint are axial directions of the inner peripheral side joint. A key groove is formed in at least one of the plurality of convex portions, and a first bolt receiver penetrating the inner peripheral side joint in the key groove in the radial direction is formed. An inner peripheral side joint having a hole and a ring-shaped brim formed along the peripheral edge of the upper surface of the inner peripheral side joint.
An annular outer peripheral side joint used by being attached to the upper end of the lower steel pipe, and a plurality of concave portions capable of engaging with the plurality of convex portions on the inner peripheral surface of the outer peripheral side joint are shafts of the outer peripheral side joint. An outer peripheral joint, which is formed to extend in the direction and has an opening formed in at least one of the plurality of recesses to penetrate the outer peripheral joint in the radial direction.
One or more parallel keys formed in a shape that can be fitted into the key groove, and one or more parallel keys formed with a second bolt receiving hole penetrating the inside of the parallel keys. ,
It is configured so that it can be fixed to the first bolt receiving hole through the second bolt receiving hole in a state where the tip portion of the parallel key passed through the opening is fitted in the key groove. A bolt having a length dimension larger than the depth dimension of the second bolt receiving hole,
With
When the inner peripheral side joint is moved axially with respect to the outer peripheral side joint and inserted into the inner peripheral side, the plurality of convex portions and the plurality of concave portions mesh with each other, and the key groove and the opening There, characterized in that it is configured to align in the radial direction of these joints, the steel KanTsugi hand structure.
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JP7333530B1 (en) | 2022-06-16 | 2023-08-25 | 雅浩 菅野 | fittings for steel pipes |
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JP2005220742A (en) * | 1999-12-24 | 2005-08-18 | Okamoto Kensetsu Yohin Seisakusho:Kk | Structure of steel pipe joint |
JP3725778B2 (en) * | 1999-12-24 | 2005-12-14 | 株式会社岡本建設用品製作所 | Steel pipe joint structure |
JP4101726B2 (en) * | 2003-09-30 | 2008-06-18 | 大和ハウス工業株式会社 | Joint structure of upper and lower piles in rotary press-fit piles |
JP4456427B2 (en) * | 2004-07-16 | 2010-04-28 | Jfeスチール株式会社 | Steel pipe pile connection structure |
JP2006144415A (en) * | 2004-11-22 | 2006-06-08 | Tasada Kosakusho:Kk | Steel pipe pile joint |
JP2009299298A (en) * | 2008-06-11 | 2009-12-24 | Chiyoda Geotech Co Ltd | Mechanical joint of steel pipe pile |
JP6243814B2 (en) * | 2014-08-29 | 2017-12-06 | 株式会社東部 | Steel pipe pile joint structure |
JP6481555B2 (en) * | 2015-07-30 | 2019-03-13 | 新日鐵住金株式会社 | Steel pipe pile joint rotation deterrent structure |
JP6177287B2 (en) * | 2015-08-07 | 2017-08-09 | 株式会社クボタ | Steel pipe connection structure and steel pipe connection method |
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2017
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JP7333530B1 (en) | 2022-06-16 | 2023-08-25 | 雅浩 菅野 | fittings for steel pipes |
JP2023183601A (en) * | 2022-06-16 | 2023-12-28 | 雅浩 菅野 | Steel pipe joint |
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