JP3182585B2 - Construction method of composite pile for supporting column - Google Patents
Construction method of composite pile for supporting columnInfo
- Publication number
- JP3182585B2 JP3182585B2 JP13621492A JP13621492A JP3182585B2 JP 3182585 B2 JP3182585 B2 JP 3182585B2 JP 13621492 A JP13621492 A JP 13621492A JP 13621492 A JP13621492 A JP 13621492A JP 3182585 B2 JP3182585 B2 JP 3182585B2
- Authority
- JP
- Japan
- Prior art keywords
- auger
- pile
- solidified material
- ground
- hollow pipe
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
- Piles And Underground Anchors (AREA)
- Placing Or Removing Of Piles Or Sheet Piles, Or Accessories Thereof (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、建設関係の基礎工事に
適用されるソイルセメント合成杭の造成方法に関するも
のである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for forming a soil cement composite pile applied to construction-related foundation work.
【０００２】[0002]
【従来の技術】地下階がある場合の建築工事では地下掘
削時の山留め工に切り梁を使用する場合が多い。掘削面
積が広い場合は切り梁支柱（一般的にＨ形鋼を使用す
る）を設ける。この切り梁支柱は既製杭や場所打ち杭等
の基礎杭の施工が完了した後、地下掘削に先駆けて地中
に打設される。最近、既製コンクリート杭と切り梁支柱
を接続して同時に施工する工法が開発されており、その
造成方法を図８〜図１３に示す。2. Description of the Related Art In a construction work in which there is an underground floor, a cut beam is often used for a mountain retaining work at the time of underground excavation. If the excavation area is large, cut beam supports (generally using H-shaped steel) will be provided. After the construction of foundation piles such as ready-made piles and cast-in-place piles is completed, the cut beam supports are driven into the ground prior to underground excavation. Recently, a construction method of connecting a ready-made concrete pile and a cutting beam support and simultaneously constructing the same has been developed, and the construction method is shown in FIGS. 8 to 13.
【０００３】この造成方法は、図８、図９に示すように
先端に掘削翼３その上段に攪拌翼４、均しドラム１１を
軸に固着したオーガー１の先端部近くから掘削液を吐出
しつつ、これを回転・給進し、孔底にスラリー状の固化
材を充満させる。次に、図１０に示すようにオーガー１
を地上へ引き揚げる。次に、図１０のごとく出来た掘削
孔に図１１に示すようにＰＨＣ杭５（高強度コンクリー
ト柱）を順次接続しつつ埋め込む（図では１本であるが
実際は複数本となる）。最後の杭はＳＣ杭６（外部鋼管
内部コンクリートでできた合成杭）を接続して掘削孔中
に埋設する（図１２）。全体の杭の長さは、削孔長さよ
り所定の長さ短くする。所定の長さはＳＣ杭上に取付台
８を介して接続されるＨ型鋼の支柱７の長さとほぼ同じ
にする。次に、ＳＣ杭上端をクランプ１０で固定して取
付台８上にＨ型鋼の支柱７を熔接する（図１２）。In this construction method, as shown in FIGS. 8 and 9, a drilling blade 3 is provided at the tip, a stirring blade 4 is provided at an upper stage, and a drilling liquid is discharged from near the tip of an auger 1 having a leveling drum 11 fixed to a shaft. While rotating and feeding, the bottom of the hole is filled with a solidified material in the form of slurry. Next, as shown in FIG.
To the ground. Next, as shown in FIG. 11, PHC piles 5 (high-strength concrete pillars) are sequentially connected and buried in the excavation hole made as shown in FIG. 10 (in the figure, there is one but a plurality of them). The last pile is connected to SC pile 6 (composite pile made of concrete inside external steel pipe) and buried in a drill hole (Fig. 12). The length of the entire pile is shorter than the drilling length by a predetermined length. The predetermined length is substantially the same as the length of the H-shaped steel column 7 connected to the SC pile via the mounting base 8. Next, the upper end of the SC pile is fixed by the clamp 10, and the H-shaped steel column 7 is welded to the mounting table 8 (FIG. 12).
【０００４】次に、図１３に示すように、取付台８に着
脱可能に被冠するヤットコ９（杭打ちの際に杭上端が地
中にもぐるまで打ち込む場合に用いる鋼製の仮杭）を被
せて支柱７を覆った状態で、ヤットコ９を作業機（図示
せず）で回転させつつ杭先端部を削孔底まで埋め込む。
このヤットコは外周にスパイラル状の凸部９ａが形成さ
れている。杭の埋め込みが終了したらヤットコ９を逆回
転させ抜きとる。前記ヤットコ９は杭５、６を埋め込む
際の正回転では杭６と係合し、逆回転では杭頭より離脱
する構造になっている。[0004] Next, as shown in FIG. 13, a yacht 9 (a steel temporary pile used for driving the pile up to the bottom of the pile when driving the pile) is detachably covered with the mounting base 8. With the cover 7 covered and the column 7 covered, the tip of the pile is buried to the drill hole bottom while rotating the yatco 9 with a working machine (not shown).
In this yatco, a spiral projection 9a is formed on the outer periphery. When the embedding of the pile is completed, the Yatco 9 is rotated in the reverse direction and removed. The yatco 9 is configured to engage with the stake 6 when the piles 5 and 6 are embedded in the forward rotation, and separate from the pile head in the reverse rotation.
【０００５】[0005]
【発明が解決しようとする課題】しかるに、従来の方法
ではプレボーリング方式であり、掘削孔径が杭径より大
であるため、鉛直精度が悪くかつ杭芯ズレが大きい。し
たがって、施工精度が悪いと切り梁の接続が困難にな
る。また、掘削時に清水を使用することが多く、そのた
め孔壁の崩壊が発生しやすく、砂質地盤や砂礫地盤では
杭を所定長埋設することが困難な場合がある。さらに清
水を使用して掘削するために掘削孔周辺地盤に応力開放
が起こり杭の支持力が低下する。同時に、大量の泥水が
発生するため、その処理対策が必要となる等の欠点があ
った。本発明は上述した事情に鑑みてなされたものであ
る。However, in the conventional method, the pre-boring method is used, and since the diameter of the excavation hole is larger than the diameter of the pile, the vertical accuracy is poor and the core misalignment is large. Therefore, if the construction accuracy is poor, it becomes difficult to connect the cut beams. In addition, freshwater is often used at the time of excavation, so that collapse of the hole wall is likely to occur, and it may be difficult to bury a predetermined length of pile in sandy ground or gravel ground. In addition, since excavation is performed using fresh water, stress is released to the ground around the excavation hole, and the bearing capacity of the pile is reduced. At the same time, since a large amount of muddy water is generated, there is a drawback in that a countermeasure for the treatment is required. The present invention has been made in view of the above circumstances.
【０００６】[0006]
【課題を解決するための手段】本発明は、前記目的を達
成するため、 （Ａ）前記オーガーロッドの先端部に掘削翼及び攪拌翼
が配設され、前記掘削翼と攪拌翼とはそれぞれオーガー
ロッドに固着された支持部材に枢軸により枢着され、前
記掘削翼及び攪拌翼がそれぞれ支持部材に枢軸とシャー
ピンにより拡開状態に保持されており、前記オーガーを
地上で準備し、別途に準備した、所定幅の少なくとも一
枚のスパイラル翼を少なくとも下端部外周に有し、該ス
パイラル翼が所定長さ以上巻回されている中空管杭の下
端より前記掘削翼及び攪拌翼を先行させた状態でオーガ
ーロッドを前記中空管杭内に挿入する工程According to the present invention, in order to achieve the above object, (A) a drilling wing and a stirring blade are disposed at the tip of the auger rod, and the drilling blade and the stirring blade are respectively auger blades. The excavator blade and the stirring blade are pivotally attached to a support member fixed to a rod, and the excavating wing and the stirring blade are respectively held in an expanded state by a pivot shaft and a shear pin on the support member.The auger is prepared on the ground and separately prepared. has at least the lower end outer periphery of at least one spiral blade of a predetermined width, below the hollow tube piles that said spiral blade is wound over a predetermined length
A step of inserting an auger rod into the hollow pipe pile with the excavating blade and the stirring blade leading from an end
【０００７】（Ｂ）オーガーロッドと中空管杭上端をそ
れぞれ作業機に把持させ、オーガーと中空管杭をそれぞ
れ回転させつつ、同時にオーガー先端部からスラリー状
の固化材を吐出しつつ、所定本数の中空管杭を継ぎ足し
ながら地盤の所定深度まで給進する工程(B) The working machine grips the upper end of the auger rod and the upper end of the hollow pipe pile, respectively, and rotates the auger and the hollow pipe pile, respectively, while simultaneously discharging the slurry-like solidified material from the tip of the auger, and A process of feeding to the specified depth of the ground while adding a number of hollow pipe piles
【０００８】（Ｃ）次に、中空管杭の給進を停止し、オ
ーガーのみを回転させつつ、同時にオーガー先端部から
スラリー状の固化材を吐出しつつ、オーガーのみを中空
管杭の上端に固定する支柱の長さを見込んで所定の距離
だけ給進する工程(C) Next, the feed of the hollow pipe pile is stopped, and only the auger is hollowed while the slurry-like solidified material is simultaneously discharged from the auger tip while rotating only the auger.
A process of feeding a predetermined distance in anticipation of the length of the post fixed to the upper end of the pipe pile
【０００９】（Ｄ）次に、固化材の吐出を、それまでに
吐出した固化材よりも圧縮強度が大きなスラリー状の固
化材に切り替え、削孔底部の根固め部をその固化材で充
満する工程(D) Next, the discharge of the solidified material is switched to a solidified material in the form of slurry having a higher compressive strength than the solidified material that has been discharged so far, and the solidified material at the bottom of the drill hole is filled with the solidified material. Process
【００１０】（Ｅ）次に、中空管杭上端部を地上で固定
し、オーガーを引揚げて前記シャーピンを切断し、攪拌
翼、及び掘削翼を中空管杭内に縮閉すると共にオーガー
を地上へ引揚げる工程(E) Next, the upper end of the hollow pipe pile is fixed on the ground, the auger is pulled up, the shear pin is cut, and the stirring blade and the excavating blade are closed and closed in the hollow pipe pile. The process of lifting the ground to the ground
【００１１】（Ｆ）次に、上端が地上で固定された中空
管杭に取付台を介してＨ形鋼乃至角形鋼管からなる支柱
を固着して立設する工程(F) Next, a step of fixing a column made of an H-shaped steel or a square steel pipe to a hollow pipe pile whose upper end is fixed on the ground via a mount, and erecting the same.
【００１２】（Ｇ）次に、該支柱上端部を作業機で把持
して回転・給進しながら前記根固め部内に中空管杭の先
端のスパイラル翼部を挿入する工程とより成る支柱兼用
合成杭の造成方法である。(G) Next, while holding the upper end of the column with a working machine and rotating / feeding the same, the tip of the hollow pipe pile is inserted into the above-mentioned consolidation portion.
A reclamation method more comprising struts combined <br/> synthetic pile and inserting a spiral blade portion end.
【００１３】本発明はまた、（Ａ）オーガーロッドの先
端に掘削翼及び攪拌翼が配設され、前記掘削巽と攪拌翼
とはそれぞれオーガーロッドに固着された支持部材に枢
軸により枢着され、前記掘削翼及び攪拌翼がそれぞれ支
持部材に枢軸とシャーピンにより拡開状態に保持されて
おり、前記オーガーを地上で準備し、別途に準備した、
所定幅の少なくとも一枚のスパイラル翼を少なくとも下
端部外周に有し、該スパイラル翼が所定長さ以上巻回さ
れている中空管杭の下端より前記掘削翼及び攪拌翼を先
行させた状態でオーガーロッドを前記中空管杭内に挿入
する工程The present invention also provides (A) a drilling wing and a stirring blade disposed at the tip of an auger rod, wherein the drilling wing and the stirring blade are respectively pivotally attached to a support member fixed to the auger rod by a pivot. The drilling wing and the stirring blade are each held in an expanded state by a pivot and a shear pin on a support member, and the auger is prepared on the ground, separately prepared,
At least one spiral blade having a predetermined width is provided at least at the outer periphery of the lower end portion, and the spiral blade is wound with a predetermined length or more, and the excavation blade and the stirring blade precede the lower end of the hollow pipe pile. Inserting an auger rod into the hollow pipe pile
【００１４】（Ｂ）オーガーロッドと中空管杭上端部を
それぞれ作業機に把持させ、オーガーと中空管杭をそれ
ぞれ回転させつつ、同時にオーガー先端部からスラリー
状の固化材を吐出しつつ、所定本数の中空管杭を継ぎ足
しながら地盤の所定深度まで給進する工程(B) The working machine grips the upper end of the auger rod and the upper end of the hollow pipe pile, respectively, while rotating the auger and the hollow pipe pile, and simultaneously discharging the slurry-like solidified material from the auger end. A process of feeding a specified number of hollow pipe piles to the ground at a specified depth
【００１５】（Ｃ）次に、中空管杭の回転と給進を停止
し、オーガーのみを回転させつつ、同時にオーガー先端
部からスラリー状の固化材を吐出しつつ、中空管杭の上
端に固定する支柱の長さを見込みかつ削孔底部の根固め
部の距離だけ浅い所定距離だけ、オーガーのみを給進す
る工程[0015] (C) Next, stop the rotation and KyuSusumu hollow tube piles, while rotating only the auger, while ejecting slurry-like solidified material from the auger tip simultaneously on the hollow tube piles
Only the only shallow predetermined distance distance roots consolidated portion of and drilled bottom narrowing viewed length of the struts secured to the end, the step of KyuSusumu auger only
【００１６】（Ｄ）次に固化材の吐出を、それまでに吐
出した固化材よりも圧縮強度が大きなスラリー状の固化
材に切り替え、オーガー先端部からその固化材を吐出し
つつ、オーガーのみを削孔底部の根固め部の距離だけ回
転・給進する工程[0016] The next ejection of the solidified material (D), switch to compressive strength large slurry solidified material than solidifying material discharged so far, while ejecting the solidified material from the auger tip auger only Of turning and feeding the drill by the distance of the root fixing part at the bottom of the hole
【００１７】（Ｅ）次に、中空管杭上端部を地上で固定
し、オーガーを引揚げて前記シャーピンを切断し、攪拌
翼及び掘削翼を中空管杭内に縮閉すると共にオーガーを
地上へ引揚げる工程(E) Next, the upper end of the hollow pipe pile is fixed on the ground, the auger is pulled up, the shear pin is cut off, the stirring blade and the excavating blade are closed and closed in the hollow pipe pile, and the auger is closed. The process of lifting to the ground
【００１８】（Ｆ）次に、上端部が地上で固定された中
空管杭に取付台を介してＨ形鋼乃至角形鋼管からなる支
柱を固着して立設する工程(F) Next, a step of fixing a pillar made of an H-shaped steel or a square steel pipe to a hollow pipe pile having an upper end fixed on the ground via a mounting stand and erecting the pillar.
【００１９】（Ｇ）次に、該支柱上端部を作業機で把持
して回転・給進しながら前記根固め部内に中空管杭の先
端のスパイラル翼部を挿入する工程とよりなる支柱兼用
合成杭の造成方法である。(G) Next, the upper end of the pillar is gripped by a working machine, and the tip of the hollow pipe pile is inserted into the consolidation portion while rotating and feeding.
This is a method of constructing a composite pillar that also serves as a column, which comprises inserting a spiral wing at the end .
【００２０】さらに、本発明は、前記工程（Ｇ）におい
て、取付台に前記支柱と略同じ長さで管状のヤットコを
接続し、該ヤットコ上端部を作業機で把持して回転・給
進しながら前記根固め部内に挿入した後、前記ヤットコ
を逆回転し、取付台より外して地上へ引き揚げることを
特徴とする支柱兼用合成杭の造成方法である。Further, in the present invention, in the step (G), a tubular yatsuko having substantially the same length as the column is connected to the mounting table, and the upper end of the yachtco is gripped by a working machine to rotate and feed. A method of forming a composite post / post pile, comprising: rotating the yachtco in the reverse direction, removing it from the mounting base and pulling it up to the ground, after inserting it into the root consolidation portion.
【００２１】さらにまた、本発明は、掘削翼と撹拌翼と
の間に共回り防止翼を、支持部材に枢軸により枢着して
取付けられている態様及びオーガーロッドの途中に少な
くとも１個のスタピライザが回動自在に遊嵌されている
態様にある。Still further, the present invention provides an embodiment in which a co-rotation preventing blade is pivotally attached to a support member by a pivot between a drilling blade and a stirring blade, and at least one stabilizer is provided in the middle of the auger rod. Are rotatably loosely fitted.
【００２２】[0022]
【作用】本発明は、固化材スラリーと地盤とを混合撹拌
し、ソイルセメント柱を造成しつつ、掘削範囲をソイル
セメントで充満させるため孔壁の崩壊がない。したがっ
て、杭を所定深さまで確実に埋設できる。中空管杭の先
端部に取付けたスパイラル翼により施工時のソイルセメ
ントを中空管杭の外周部に引き込むことができる。した
がって、排土が杭外周を通って地上に排出されるため、
杭頭部からの排土による飛散がなく施工現場を汚すこと
がない。杭先端部のスパイラル翼により、杭先端部の実
質的面積を拡大するため、中空管杭が大きな支持力を発
揮する。ソイルセメント柱を造成しつつ掘進するため、
周辺地盤の応力開放がなく、中空管杭が大きな支持力を
発揮する。オーガーロッドの途中に少なくとも１個のス
タビライザが遊嵌されているため、ソイルセメント柱と
中空管杭の芯ズレがない。プレボーリング部への中空管
杭の挿入時は杭先端部に取付けたソイルセメント柱と略
同径のスパイラル翼の効果により、ソイルセメント柱と
中空管杭の芯ズレがない。中掘り方式とオプレボーリン
グ方式を組み合わせる事により、中空管杭と支柱の合成
杭を精度よく埋設できる。According to the present invention, the excavation area is filled with soil cement while mixing and stirring the solidified material slurry and the ground to form a soil cement column, so that the hole wall does not collapse. Therefore, the pile can be buried reliably to a predetermined depth. Soil cement at the time of construction can be drawn into the outer periphery of the hollow pipe pile by the spiral blade attached to the tip of the hollow pipe pile. Therefore, the earth removal is discharged to the ground through the periphery of the pile,
There is no scattering due to earth removal from the pile head and the construction site is not polluted. The spiral wing at the tip of the pile enlarges the substantial area at the tip of the pile, so that the hollow tube pile exerts a large bearing capacity. To excavate while creating soil cement columns,
There is no stress release in the surrounding ground, and the hollow pipe piles exert a large bearing capacity. Since at least one stabilizer is loosely fitted in the middle of the auger rod, there is no misalignment between the soil cement column and the hollow tube pile. When the hollow pipe pile is inserted into the pre-boring part, there is no misalignment between the soil cement column and the hollow pipe pile due to the effect of the spiral blade having substantially the same diameter as the soil cement column attached to the tip of the pile. By combining the middle digging method and the opre boring method, a composite pile of hollow pipe piles and columns can be buried with high accuracy.
【００２３】[0023]
【実施例】以下添付図に基づいて本発明の実施例を説明
する。図１〜図７は本発明の一実施例を示す工程図であ
る。本発明に使用するオーガー２０はオーガーロッド２
１の途中に少なくとも１個のスタビライザ２２が回転自
在に遊嵌されている。そして、その先端には掘削翼２３
が、その上段には共回り防止翼２４及び攪拌翼２５が配
設され、掘削翼２３と攪拌翼２５とはそれぞれオーガー
ロッド２１に固着された支持部材に枢軸２３ａ、２５ａ
により枢着され、共回り防止翼２４は支持部材を介して
オーガーロッド２１に回転自在に遊嵌されると共に枢軸
２４ａにより枢着されている。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings. 1 to 7 are process diagrams showing one embodiment of the present invention. The auger 20 used in the present invention is an auger rod 2
At least one stabilizer 22 is freely rotatably fitted in the middle of one. And the tip of the excavator 23
However, an anti-corotating blade 24 and an agitating blade 25 are disposed on the upper stage, and the excavating blade 23 and the agitating blade 25 are respectively attached to support members fixed to the auger rod 21 by pivots 23a, 25a.
The anti-corotating wing 24 is rotatably and loosely fitted to the auger rod 21 via a support member, and is pivotally connected by a pivot 24a.
【００２４】また、掘削翼２３、共回り防止翼２４及び
攪拌翼２５はそれぞれ支持部材に枢軸２３ａ、２４ａ、
２５ａとシャーピン（図示せず）により拡開状態に保持
されている。そして、共回り防止翼２４は図に示すよう
に前記掘削翼２３及び攪拌翼２５よりも大径になってお
り、給進中に掘削された孔壁３１にくい込むので、掘削
翼２３及び攪拌翼２５が回転しても回転しない。従っ
て、掘削翼２３で掘削されて生じた土塊は、回転しない
共回り防止翼２４に当って掘削翼２３との間で剪断され
て細かくなる。The excavating wing 23, the anti-corotating wing 24 and the stirring wing 25 are respectively provided on supporting members as pivots 23a, 24a,
It is held in an expanded state by 25a and a shear pin (not shown). The anti-corotating blade 24 has a larger diameter than the excavating blade 23 and the stirring blade 25 as shown in the figure. Even if 25 rotates, it does not rotate. Therefore, the earth mass generated by excavation by the excavation wings 23 collides with the non-rotating anti-rotational wings 24 and is sheared with the excavation wings 23 to become fine.
【００２５】本発明は、先づ図１に示すように前記オー
ガー２０を地上で準備し、別途に準備した、所定幅の少
なくとも一枚のスパイラル翼４１を少なくとも下端部外
周に有し、該スパイラル翼４１が所定長さ以上巻回され
ている鋼管杭４０の下端より、前記掘削翼２３、共回り
防止翼２４及び攪拌翼２５を先行させた状態でオーガー
ロッド２０を鋼管杭４０内に挿入する。According to the present invention, as shown in FIG. 1, the auger 20 is prepared on the ground, and at least one spiral wing 41 of a predetermined width separately prepared is provided at least on the outer periphery of the lower end portion. The auger rod 20 is inserted into the steel pipe pile 40 with the excavation wing 23, the co-rotation prevention wing 24, and the stirring wing 25 preceding the lower end of the steel pipe pile 40 in which the wing 41 is wound over a predetermined length. .
【００２６】次に、図１〜図２に示すように、オーガー
ロッド２１と鋼管杭４０上端をそれぞれ図示しない作業
機に把持させ、オーガー２０と鋼管杭４０をそれぞれ矢
印に示すように互に反対方向（同一方向でも良い）に回
転させつつ、同時にオーガー２０先端からスラリー状の
固化材を吐出しつつ、所定本数の鋼管杭４０を継ぎ足し
ながら地盤の所定深度まで給進する（鋼管杭４０の位
置、図３〜図４）。Next, as shown in FIGS. 1 and 2, the auger rod 21 and the upper end of the steel pipe pile 40 are respectively gripped by a working machine (not shown), and the auger 20 and the steel pipe pile 40 are opposed to each other as shown by arrows. While rotating in the same direction (may be the same direction) and simultaneously discharging the solidified material in the form of slurry from the tip of the auger 20, the steel pipe pile 40 is fed up to a predetermined depth of the ground while adding a predetermined number of steel pipe piles 40 (the position of the steel pipe pile 40). 3 and 4).
【００２７】次に、図４に示すように鋼管杭４０の給進
を停止し、オーガー２０のみを回転させつつ、同時にオ
ーガー２０先端からスラリー状の固化材を吐出しつつ、
オーガー２０のみを所定の距離だけ給進する。Next, as shown in FIG. 4, the feed of the steel pipe pile 40 is stopped, and only the auger 20 is rotated while simultaneously discharging the slurry-like solidified material from the tip of the auger 20.
Only the auger 20 is fed by a predetermined distance.
【００２８】次に、固化材の吐出をそれまで吐出した固
化材よりも圧縮強度が大きいスラリー状の固化材に切り
替え、削孔底部の根固め部５０をその固化材で充満す
る。Next, the discharge of the solidified material is switched to a solidified material in the form of slurry having a higher compressive strength than the solidified material that has been discharged so far, and the solidified material 50 at the bottom of the hole is filled with the solidified material.
【００２９】ただし、前述のごとく、オーガー２０のみ
を所定の距離だけ給進する代りに、削孔底部より根固め
部５０の距離だけ浅い距離だけ給進し、次に固化材の吐
出を、それまでに吐出した固化材よりも圧縮強度が大き
いスラリー状に固化材に切り替え、オーガー２０先端か
らその固化材を吐出しつつ、オーガー２０のみを削孔底
部の根固め部５０の距離だけ回転・給進することもでき
る。However, as described above, instead of feeding only the auger 20 by a predetermined distance, the auger 20 is fed only a distance shallower than the bottom of the drill hole by the distance of the rooting portion 50, and then the discharge of the solidified material is performed. The solidified material is switched to a slurry having a compressive strength greater than that of the solidified material discharged until then, and while the solidified material is discharged from the tip of the auger 20, only the auger 20 is rotated and supplied by the distance of the root consolidation portion 50 at the bottom of the drilling hole. You can also proceed.
【００３０】次に、図５に示すように、鋼管杭４０上端
を地上のクランプ１０で固定し、オーガー２０を引揚げ
ると、攪拌翼２３、共回り防止翼２４及び掘削翼２５は
鋼管杭４０の下端に当接するので前記シャーピン（図示
せず）が切断し、攪拌翼２３、共回り防止翼２４及び掘
削翼２５は下方に折り畳まれて上昇し、鋼管杭４０内に
縮閉されると共に、オーガー２０は地上へ引揚げられ
る。Next, as shown in FIG. 5, when the upper end of the steel pipe pile 40 is fixed by the clamp 10 on the ground and the auger 20 is pulled up, the stirring blade 23, the co-rotation prevention blade 24 and the excavation blade 25 become the steel pipe pile 40. The agitating blade 23, the anti-corotating wing 24 and the excavating wing 25 are folded downward and rise, and are closed and closed in the steel pipe pile 40, because the shear pin (not shown) is cut. Auger 20 is withdrawn to the ground.
【００３１】次に、図６に示すように上端が地上のクラ
ンプ１０で固定された鋼管杭４０に取付台４２を介して
Ｈ型鋼の支柱７を固着して立設する。支柱７は構築する
建築物の柱材（角形鋼管）を用いてもよい。Next, as shown in FIG. 6, an H-shaped steel column 7 is fixedly mounted on a steel pipe pile 40 whose upper end is fixed by a clamp 10 on the ground via a mount 42. The column 7 may be a column material (square steel pipe) of a building to be constructed.
【００３２】次に、前記取付台４２に前記支柱７と略同
じ長さで管状のヤットコ４４（図７の２点鎖線）を正回
転で接続した後、前記クランプ１０を解放し、前記ヤッ
トコ４４上端を図示しない作業機で把持して回転・給進
しながら前記根固め部５０内に挿入した後、ヤットコ４
４を逆回転して取付台４２より外して地上へ引揚げる
（図７）。ただし、前記取付台４２にヤットコを接続せ
ず、支柱７上端を図示しない作業機で把持して回転・給
進しながら根固め部５０に挿入することもできる。Next, after connecting a tubular Yatsuko 44 (two-dot chain line in FIG. 7) having substantially the same length as the column 7 to the mounting base 42 by positive rotation, the clamp 10 is released, and the Yatsuko 44 is released. After the upper end is gripped by a work machine (not shown) and is inserted into the root fixing portion 50 while rotating and feeding,
4 is rotated in the reverse direction, removed from the mounting base 42, and pulled up to the ground (FIG. 7). However, it is also possible to hold the upper end of the column 7 with a work machine (not shown) and insert it into the root fixing portion 50 while rotating and feeding without connecting the yoke to the mounting table 42.
【００３３】[0033]
【発明の効果】以上詳細に説明した本発明によれば、下
記のごとき効果を奏するものである。 （１）固化材スラリーと地盤とを混合攪拌し、ソイルセ
メント柱を造成しつつ、掘削範囲をソイルセメントで充
満させるため孔壁の崩壊がない。したがって、杭を所定
深さまで確実に埋設できる。 （２）中空管杭の先端部に取付けたスパイラル翼により
施工時のソイルセメントを中空管杭の外周部に引き込む
ことができる。したがって、排土が杭外周を通って地上
に排出されるため、杭頭部からの排土による飛散がなく
施工現場を汚すことがない。 （３）杭先端部のスパイラル翼により、杭先端部の実質
的面積が拡大されるため、中空管杭が大きな支持力を発
揮する。 （４）ソイルセメント柱を造成しつつ掘進するため、周
辺地盤の応力開放がなく、中空管杭が大きな支持力を発
揮する。 （５）本発明の造成方法による支柱兼用合成杭は、支柱
を除きその下方の中空管杭は中堀り工法により施工さ
れ、さらにこの中空管杭の中に挿通した状態でオーガー
先端からスラリー状の固化材を吐出しつつ、オーガーの
みを中空管杭の上端に固定する支柱の長さを見込んで所
定距離だけ給進されているので、中空管杭と支柱の合成
杭を精度よく埋設できる。 （６）中空管杭の中に挿通した状態でオーガー先端から
スラリー状の固化材を吐出しつつ、オーガーのみを中空
管杭の上端に固定する支柱の長さを見込んで所定距離だ
け給進されており、また該部分への中空管杭の挿入時は
杭先端部外周に取り付けたスパイラル翼の効果により、
ソイルセメント柱と中空管杭の芯ズレも、中空管杭との
芯ズレも少ない。 （７）オーガーロッドの途中に少なくとも１個のスタピ
ライザーが遊嵌しているため、ソイルセメント柱と中空
管杭との芯ズレがなくなる。 According to the present invention described in detail above, the following effects can be obtained. (1) and the solidifying material slurry and the ground mixture stirred while construct a soil cement pillar, there is no collapse of the hole wall in order to fill in soil cement drilling range. Therefore, the pile can be buried reliably to a predetermined depth. (2) Soil cement at the time of construction can be drawn into the outer peripheral portion of the hollow pipe pile by the spiral blade attached to the tip of the hollow pipe pile. Therefore, since the earth removal is discharged to the ground through the periphery of the pile, there is no scattering due to the earth removal from the pile head, and the construction site is not polluted. (3) Since the spiral wing at the tip of the pile enlarges the substantial area of the tip of the pile, the hollow pipe pile exerts a large supporting force. (4) Since the excavation is carried out while forming a soil cement column, there is no stress relief in the surrounding ground, and the hollow pipe pile exerts a large supporting force. (5) The composite post that also serves as a pillar according to the creation method of the present invention is a pillar
Except for the hollow pipe piles below,
Auger with this hollow tube pile inserted
While discharging the slurry-like solidified material from the tip,
Consider the length of the column that secures the
Since it is fed only a fixed distance, the composite of hollow pipe pile and strut
Piles can be buried accurately. (6) From the tip of the auger with the hollow pipe pile inserted
While discharging slurry-like solidified material, hollow only auger
It is a predetermined distance considering the length of the pillar fixed to the upper end of the pipe pile
When the hollow pipe pile is inserted into this part, due to the effect of the spiral wing attached to the outer periphery of the pile tip,
The core misalignment between the soil cement column and the hollow pipe pile
Less misalignment. (7) At least one stapler in the middle of the auger rod
Soil cement pillar and hollow because riser is loosely fitted
There is no misalignment with the pipe pile.
【図１】本発明の一実施例を示す工程図である。FIG. 1 is a process chart showing one embodiment of the present invention.
【図２】本発明の一実施例を示す工程図である。FIG. 2 is a process chart showing one embodiment of the present invention.
【図３】本発明の一実施例を示す工程図である。FIG. 3 is a process chart showing one embodiment of the present invention.
【図４】本発明の一実施例を示す工程図である。FIG. 4 is a process chart showing one embodiment of the present invention.
【図５】本発明の一実施例を示す工程図である。FIG. 5 is a process chart showing one embodiment of the present invention.
【図６】本発明の一実施例を示す工程図である。FIG. 6 is a process chart showing one embodiment of the present invention.
【図７】本発明の一実施例を示す工程図である。FIG. 7 is a process chart showing one embodiment of the present invention.
【図８】従来の支柱兼用合成杭の造成方法を示す工程図
である。FIG. 8 is a process diagram showing a conventional method of forming a composite post / post.
【図９】従来の支柱兼用合成杭の造成方法を示す工程図
である。FIG. 9 is a process diagram showing a conventional method of forming a composite post / post.
【図１０】従来の支柱兼用合成杭の造成方法を示す工程
図である。FIG. 10 is a process chart showing a conventional method for forming a composite post / post.
【図１１】従来の支柱兼用合成杭の造成方法を示す工程
図である。FIG. 11 is a process chart showing a conventional method for forming a composite pillar that also serves as a column.
【図１２】従来の支柱兼用合成杭の造成方法を示す工程
図である。FIG. 12 is a process diagram showing a conventional method for forming a composite pillar that also serves as a column.
【図１３】従来の支柱兼用合成杭の造成方法を示す工程
図である。FIG. 13 is a process chart showing a conventional method of forming a composite pillar that also serves as a column.
７ 支柱 １０ クランプ ２０ オーガー ２１ オーガーロッド ２２ スタビライザ ２３ 掘削翼 ２４ 共回り防止翼 ２５ 攪拌翼 ２３ａ，２４ａ，２５ａ 枢軸 ３１ 孔壁 ４０ 鋼管杭 ４１ スパイラル翼 ４２ 取付台 ４４ ヤットコ ５０ 根固め部 7 Prop 10 Clamp 20 Auger 21 Auger rod 22 Stabilizer 23 Excavating wing 24 Anti-rotating wing 25 Stirrer wing 23 a, 24 a, 25 a Axis 31 Hole wall 40 Steel pipe pile 41 Spiral wing 42 Mounting table 44 Yatco 50
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平３−212506（ＪＰ，Ａ) 特開 昭62−296014（ＪＰ，Ａ) 特開 昭59−134226（ＪＰ，Ａ) 特開 昭55−155822（ＪＰ，Ａ) 特開 昭54−119705（ＪＰ，Ａ) 特開 平４−209206（ＪＰ，Ａ) 特公 昭46−17012（ＪＰ，Ｂ１) (58)調査した分野(Int.Cl.7，ＤＢ名) E02D 7/00 E02D 3/12 102 E02D 5/62 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-3-212506 (JP, A) JP-A-62-296014 (JP, A) JP-A-59-134226 (JP, A) JP-A-55- 155822 (JP, A) JP-A-54-119705 (JP, A) JP-A-4-209206 (JP, A) JP-B-46-17012 (JP, B1) (58) Fields investigated (Int. 7 , DB name) E02D 7/00 E02D 3/12 102 E02D 5/62
Claims (5)
方法。 （Ａ）オーガーロッドの先端部に掘削翼及び攪拌翼が配
設され、前記掘削翼と攪拌翼とはそれぞれオーガーロッ
ドに固着された支持部材に枢軸により枢着され、前記掘
削翼及び攪拌翼がそれぞれ支持部材に枢軸とシャーピン
により拡開状態に保持されており、前記オーガーを地上
で準備し、別途に準備した、所定幅の少なくとも一枚の
スパイラル翼を少なくとも下端部外周に有し、該スパイ
ラル翼が所定長さ以上巻回されている中空管杭の下端よ
り前記掘削翼及び攪拌翼を先行させた状態でオーガーロ
ッドを前記中空管杭内に挿入する工程 （Ｂ）オーガーロッドと中空管杭上端をそれぞれ作業機
に把持させ、オーガーと中空管杭をそれぞれ回転させつ
つ、同時にオーガー先端部からスラリー状の固化材を吐
出しつつ、所定本数の中空管杭を継ぎ足しながら地盤の
所定深度まで給進する工程 （Ｃ）次に、中空管杭の給進を停止し、オーガーのみを
回転させつつ、同時にオーガー先端部からスラリー状の
固化材を吐出しつつ、オーガーのみを中空管杭の上端に
固定する支柱の長さを見込んで所定の距離だけ給進する
工程 （Ｄ）次に、固化材の吐出を、それまでに吐出した固化
材よりも圧縮強度が大きなスラリー状の固化材に切り替
え、削孔底部の根固め部をその固化材で充満する工程 （Ｅ）次に、中空管杭上端部を地上で固定し、オーガー
を引揚げて前記シャーピンを切断し、攪拌翼、及び掘削
翼を中空管杭内に縮閉すると共にオーガーを地上へ引揚
げる工程 （Ｆ）次に、上端が地上で固定された中空管杭に取付台
を介してＨ形鋼乃至角形鋼管からなる支柱を固着して立
設する工程 （Ｇ）次に、該支柱上端部を作業機で把持して回転・給
進しながら前記根固め部内に中空管杭の先端のスパイラ
ル翼部を挿入する工程1. A method for forming a composite post / post which comprises a column and comprises the following steps. (A) A drilling blade and a stirring blade are disposed at the tip of an auger rod, and the drilling blade and the stirring blade are respectively pivotally connected to a support member fixed to the auger rod by a pivot. Each supporting member is held in an expanded state by a pivot and a shear pin, and the auger is prepared on the ground, and at least one spiral wing having a predetermined width separately prepared is provided at least on the outer periphery of a lower end portion. A step of inserting an auger rod into the hollow pipe pile with the excavating wing and the stirring blade preceding the lower end of the hollow pipe pile having the wing wound for a predetermined length or more (B) A) A predetermined number of hollow tubes are formed by holding the upper end of the auger rod and the hollow tube pile by the working machine, rotating the auger and the hollow tube pile respectively, and simultaneously discharging the slurry-like solidified material from the auger tip. Pile Step of feeding to the predetermined depth of the ground while adding (C) Next, while stopping feeding of the hollow pipe pile, rotating only the auger, and simultaneously discharging the slurry-like solidified material from the auger tip, Auger only on top of hollow tube pile
Step of feeding by a predetermined distance in anticipation of the length of the column to be fixed (D) Next, the discharge of the solidified material is switched to a slurry-like solidified material having a higher compressive strength than the solidified material discharged up to then. Step of filling the solidified material at the bottom of the drilled hole with the solidified material (E) Next, the upper end of the hollow pipe pile is fixed on the ground, the auger is pulled up, the shear pin is cut, the stirring blade, and the excavating blade. (F) Next, a column made of an H-shaped steel or a square steel pipe is mounted on a hollow pipe pile fixed on the ground at the upper end via a mounting base. (G) Next, the upper end of the column is gripped by a working machine, and the tip of the hollow pipe pile is inserted into the root consolidation portion while rotating and feeding.
The process of inserting the wing
方法。 （Ａ）オーガーロッドの先端に掘削翼及び攪拌翼が配設
され、前記掘削翼と攪拌翼とはそれぞれオーガーロッド
に固着された支持部材に枢軸により枢着され、前記掘削
翼及び攪拌翼がそれぞれ支持部材に枢軸とシャーピンに
より拡開状態に保持されており、前記オーガーを地上で
準備し、別途に準備した、所定幅の少なくとも一枚のス
パイラル翼を少なくとも下端部外周に有し、該スパイラ
ル翼が所定長さ以上巻回されている中空管杭の下端より
前記掘削翼及び攪拌翼を先行させた状態でオーガーロッ
ドを前記中空管杭内に挿入する工程 （Ｂ）オーガーロッドと中空管杭上端部をそれぞれ作業
機に把持させ、オーガーと中空管杭をそれぞれ回転させ
つつ、同時にオーガー先端部からスラリー状の固化材を
吐出しつつ、所定本数の中空管杭を継ぎ足しながら地盤
の所定深度まで給進する工程 （Ｃ）次に、中空管杭の給進を停止し、オーガーのみを
回転させつつ、同時にオーガー先端部からスラリー状の
固化材を吐出しつつ、中空管杭の上端に固定する支柱の
長さを見込みかつ削孔底部の根固め部の距離だけ浅い所
定距離だけ、オーガーのみを給進する工程 （Ｄ）次に、固化材の吐出を、それまでに吐出した固化
材よりも圧縮強度が大きなスラリー状の固化材に切り替
え、オーガー先端部からその固化材を吐出しつつ、オー
ガーのみを削孔底部の根固め部の距離だけ回転・給進す
る工程 （Ｅ）次に、中空管杭上端部を地上で固定し、オーガー
を引揚げて前記シャーピンを切断し、攪拌翼及び掘削翼
を中空管杭内に縮閉すると共にオーガーを地上へ引揚げ
る工程 （Ｆ）次に、上端部が地上で固定された中空管杭に取付
台を介してＨ形鋼乃至角形鋼管からなる支柱を固着して
立設する工程 （Ｇ）次に、該支柱上端部を作業機で把持して回転・給
進しながら前記根固め部内に中空管杭の先端のスパイラ
ル翼部を挿入する工程2. A method of constructing a composite post / post pile comprising the following steps. (A) A digging wing and a stirring blade are disposed at the tip of an auger rod, and the digging wing and the stirring wing are respectively pivotally connected to a support member fixed to the auger rod by a pivot. The support member is held in an expanded state by a pivot and a shear pin, the auger is prepared on the ground, and at least one spiral blade having a predetermined width separately prepared is provided at least on the outer periphery of a lower end portion. Inserting the auger rod into the hollow pipe pile with the excavating wing and the stirring blade preceding the lower end of the hollow pipe pile wound with a predetermined length or more (B) Auger rod and hollow The work machine grips the upper ends of the pipe piles, rotates the auger and the hollow pipe pile, and simultaneously discharges the slurry-like solidified material from the tip of the auger, and connects a predetermined number of hollow pipe piles. Step of feeding the ground to a predetermined depth while adding the ground (C) Next, while stopping the feeding of the hollow pipe pile, rotating only the auger and simultaneously discharging the slurry-like solidified material from the tip of the auger. Of the column fixed to the upper end of the hollow pipe pile
A place where the length is expected and it is shallow by the distance of the root fixing part at the bottom of the hole
Step of feeding only the auger for a fixed distance (D) Next, the discharge of the solidified material is switched to a slurry-type solidified material having a higher compressive strength than the solidified material discharged so far, and the solidified material is solidified from the tip of the auger. A step of rotating and feeding only the auger by the distance of the solidification portion at the bottom of the drilling hole while discharging the material (E) Next, the upper end of the hollow pipe pile is fixed on the ground, and the auger is lifted to remove the auger. Cutting the agitator blades and excavating wings into the hollow tube pile and lifting the auger to the ground (F) Then, the upper end is connected to the hollow tube pile fixed on the ground via a mounting base. step erected by fixing a post made of H-beams or square tube Te (G) Next, a hollow tube pile to the root compaction portion while rotating-KyuSusumu gripped by the work machine strut upper portion Spiral tip
The process of inserting the wing
ヤットコを接続し、該ヤットコ上端部を作業機で把持し
て回転・給進しながら前記根固め部内に挿入した後、前
記ヤットコを逆回転し、取付台より外して地上へ引き揚
げることを特徴とする請求項１又は請求項２記載の支柱
兼用合成杭の造成方法。3. A tubular yatsuko having substantially the same length as the support column is connected to the mounting table, and the upper end of the yachtco is gripped by a working machine and inserted into the root fixing portion while rotating / feeding. reverse rotation of the tongs, according to claim 1 or claim 2 Construction method of post combined synthetic pile according Remove from mount, characterized in that withdraw into the ground.
を、支持部材に枢軸により枢着して取付けたことを特徴
とする請求項１、２又は３記載の支柱兼用合成杭の造成
方法。Wherein the co-rotation preventing blade between the drilling blade and a stirring blade, a support member pivot by pivoted to claim 1, 2 or 3 post combined synthesis pile, wherein the attached Construction method.
のスタピライザが回動自在に遊嵌されたことを特徴とす
る請求項１、２、３又は４記載の支柱兼用合成杭の造成
方法。5. At least one Sutapiraiza the claims 1, 2, 3 or 4 Construction method of post combined synthetic pile, wherein the loosely fitted rotatably in the middle of the auger rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13621492A JP3182585B2 (en) | 1992-04-28 | 1992-04-28 | Construction method of composite pile for supporting column |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13621492A JP3182585B2 (en) | 1992-04-28 | 1992-04-28 | Construction method of composite pile for supporting column |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05306519A JPH05306519A (en) | 1993-11-19 |
| JP3182585B2 true JP3182585B2 (en) | 2001-07-03 |
Family
ID=15169977
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13621492A Expired - Fee Related JP3182585B2 (en) | 1992-04-28 | 1992-04-28 | Construction method of composite pile for supporting column |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3182585B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4536615B2 (en) * | 2005-07-22 | 2010-09-01 | Ｊｆｅスチール株式会社 | Construction method of steel pillars to steel pipe piles, buried pipe body and pile construction method |
-
1992
- 1992-04-28 JP JP13621492A patent/JP3182585B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH05306519A (en) | 1993-11-19 |
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