JP4831511B2 - Construction method of foundation pile - Google Patents

Construction method of foundation pile Download PDF

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JP4831511B2
JP4831511B2 JP2006116085A JP2006116085A JP4831511B2 JP 4831511 B2 JP4831511 B2 JP 4831511B2 JP 2006116085 A JP2006116085 A JP 2006116085A JP 2006116085 A JP2006116085 A JP 2006116085A JP 4831511 B2 JP4831511 B2 JP 4831511B2
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excavation
pile hole
pile
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好伸 木谷
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Mitani Sekisan Co Ltd
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この発明は、杭穴内に鉄筋かごを埋設するいわゆる現場造成による基礎杭の構築方法又は、杭穴内に既製杭を埋設する基礎杭の構築方法に関する。   The present invention relates to a construction method of a foundation pile by so-called on-site construction in which a reinforcing bar is buried in a pile hole or a construction method of a foundation pile in which a ready-made pile is buried in a pile hole.

(1) 従来、杭穴内に既製杭を埋設して基礎杭を構築する方法では、連続掘削可能な重機として、電気駆動型のオーガーを装着した重機(以下「電気式の重機」)を使用していた(特許文献1)。一方、杭穴内に鉄筋かごとコンクリートを入れて現場造成で基礎杭を構築する方法では、大径掘削可能な重機として油圧駆動型のオーガーを装着した重機(以下「油圧式の重機」)を使用していた(特許文献2)。 (1) Conventionally, in the method of constructing foundation piles by burying ready-made piles in pile holes, heavy machinery equipped with electrically driven augers (hereinafter referred to as “electric heavy machinery”) is used as heavy machinery capable of continuous excavation. (Patent Document 1). On the other hand, in the method of constructing a foundation pile by constructing steel bars and concrete in the pile hole, a heavy machine equipped with a hydraulically driven auger (hereinafter referred to as “hydraulic heavy machine”) is used as a heavy machine capable of large-diameter excavation. (Patent Document 2).

(2) 電気式の重機では、垂直自立式の柱状のやぐら(一般に高さ15m程度まで可能)に、電気駆動するオーガーを昇降自在に装着し、オーガーの下端に掘削ロッドを連結した構造であった。従って、掘り進めてオーガーが地面付近に位置した段階で、一旦掘削ロッドをオーガーから切り離して、掘削ロッドの上端又は中間を地上付近で支持して、オーガーを柱状のやぐらの最上部に位置させれば、保持した掘削ロッドとオーガーの間に更に、掘削ロッド(長さ5〜15m程度)を継ぎ足すことができた。従って、継ぎ足しながら、掘削ロッドの長さに相当する5〜15mずつ連続して掘削して、より深い位置に掘削ヘッドを送り杭穴掘削することが可能であった。また、既製杭の埋設時にはオーガーに装着した既製杭を連結しながら、杭穴深さに対応した長尺な既製杭を形成して杭穴内に埋設することも可能であった。 (2) An electric heavy machine has a structure in which an electrically driven auger is mounted on a vertical self-supporting columnar tower (generally up to a height of about 15 m) and a drilling rod is connected to the lower end of the auger. It was. Therefore, once the auger is located near the ground after digging, the excavation rod is once disconnected from the auger, and the upper end or middle of the excavation rod is supported near the ground so that the auger can be positioned at the top of the columnar tower. For example, a drill rod (about 5 to 15 m in length) could be added between the held drill rod and the auger. Therefore, it was possible to continuously excavate by 5 to 15 m corresponding to the length of the excavation rod while adding, and to excavate the pile hole to a deeper position by feeding the excavation head. Moreover, it was also possible to form a long ready-made pile corresponding to the depth of the pile hole and embed it in the pile hole while connecting the ready-made pile attached to the auger when the ready-made pile was buried.

従って、この既製杭を使用する地盤では、深い位置に支持地盤がある場合には最大で60mを超える場合もあったので、掘削速度の速さを満たすことが必要不可欠となっていたので、電気式の重機が適していた。また、逆に掘削速度の遅い油圧式の重機が使用されることはなかった。   Therefore, in the ground using this ready-made pile, if there is a support ground in a deep position, it may exceed 60 m at the maximum, so it was indispensable to satisfy the speed of excavation speed. Type heavy machinery was suitable. Conversely, hydraulic heavy machinery with a slow excavation speed was never used.

また、電気式の重機では、駆動部分のオーガーの構造やオーガーを支持するやぐらの構造が柱状であることにより、掘削中心軸がやぐらの軸と平行し、大径とするためには掘削中心軸をやぐらから離さなければならなかったので、大型で重いオーガーを装着すると、柱状のやぐらが自立できず、ワイヤーなどで支えることが必要であり、大きな径に対応できなかった。従って、既製杭を使用する基礎杭工法では、製造する既製杭の外径の限界や電気式の重機の限界から基礎杭の外径は最大で150cm程度となっていた。   Also, in the electric heavy machinery, the structure of the auger of the drive part and the structure of the tower that supports the auger are columnar, so that the excavation center axis is parallel to the axis of the tower and the excavation center axis Because it had to be separated from the tower, if a large and heavy auger was installed, the pillar-shaped tower could not stand on its own, and it was necessary to support it with wires, etc., and could not handle a large diameter. Therefore, in the foundation pile construction method using the ready-made pile, the outer diameter of the foundation pile is about 150 cm at the maximum due to the limit of the outer diameter of the ready-made pile to be manufactured and the limit of the electric heavy machinery.

よって、既製杭を使用する杭長の長い基礎杭工法では、専ら電気式の重機を使用することになり、油圧式の重機を使用する必要はなかった。   Therefore, in the foundation pile construction method with a long pile length using ready-made piles, electric heavy machinery is exclusively used, and it is not necessary to use hydraulic heavy machinery.

(3) 一方、現場造成杭では、製造する鉄筋かごの大きさに制限が無いので、杭径200cm〜300cmの杭穴も多く採用されていた。この場合、油圧式の重機では、大径掘削を可能とするために、駆動部分のオーガーを支持するやぐらがクレーン状として、やぐらの傾きを変えること により、大径の杭穴にも充分に対応することができた。 (3) On the other hand, since there is no limit to the size of the reinforcing bar cage to be manufactured, many pile holes with a pile diameter of 200 cm to 300 cm have been employed in the field-built piles. In this case, in order to enable large-diameter excavation in hydraulic heavy machinery, the tower that supports the auger of the driving part is shaped like a crane, and it can sufficiently handle large-diameter pile holes by changing the inclination of the tower. We were able to.

この場合、一般的にオーガーは地上3〜5m付近で支持して、入れ子式で伸縮可能な掘削ロッドを、オーガーを貫通して装着して、掘削ロッドを昇降させると共に、掘削ロッド伸ばしながらより深い位置まで掘削ロッドの先端のヘッドを送って杭穴掘削していた。従って、この油圧式の重機では、最大で地面とオーガーの間の距離3〜5mだけ掘削をしたならば、一旦オーガーを止めて、ロッドを伸ばさなければならず、連続して掘削ができなかった。   In this case, the auger is generally supported in the vicinity of 3 to 5 m above the ground, and a telescoping drill rod that can be extended and retracted is installed through the auger to raise and lower the drill rod and deepen while extending the drill rod. The head of the drill rod was sent to the position to drill the pile hole. Therefore, with this hydraulic heavy machine, if excavation was performed at a distance of 3 to 5 m between the ground and the auger at the maximum, the auger had to be stopped once and the rods had to be extended, and continuous excavation was not possible. .

逆に、連続掘削をするために、オーガーを地面から高い位置で支持するためには、クレーンを大きくする必要があり(例えば、地上15mで支持する為には、長さ約20m程度のクレーンを必要とした)、現場で走行しながら掘削作業をする重機としては、走行部分が大きくなり、そのような大型の重機は実現できなかった。
特開平9−41377 特開平7−243294
On the contrary, in order to support the auger at a high position from the ground for continuous excavation, it is necessary to enlarge the crane (for example, to support the auger at 15 m above the ground, a crane of about 20 m in length is required. As a heavy machine that performs excavation work while traveling on site, the traveling part becomes large, and such a large heavy machine could not be realized.
JP-A-9-41377 JP-A-7-243294

(1) 前記従来の重機の場合、現状の電気式の重機では、駆動力に限界があり、使用する掘削ヘッドの構造にもよるが掘削可能な最大径は150cm程度となっていた。従って、電気式の重機では150cmを超える大径に対応できず、大径の杭穴を掘削する場合には、速度が遅いが、専ら油圧式の重機が使用されていた。よって、現場造成による基礎杭工法では、専ら油圧式の重機を使用することになり、150cmを超える大径掘削においては、電気式の重機を排除していた。 (1) In the case of the conventional heavy machine, the current electric heavy machine has a limit in driving force, and the maximum drillable diameter is about 150 cm, although it depends on the structure of the drilling head used. Therefore, electric heavy machinery cannot cope with a large diameter exceeding 150 cm, and when excavating a large-diameter pile hole, the speed is slow, but exclusively hydraulic heavy machinery has been used. Therefore, in the foundation pile construction method by site construction, hydraulic heavy machinery was exclusively used, and electric heavy machinery was excluded in large-diameter excavation exceeding 150 cm.

(2) また、構築現場の地盤状況などを考慮して、現場造成杭による基礎杭とするか、既製杭を使った基礎杭とするか、各建設現場に適用する基礎杭が決定されていた。また、上記のように夫々の重機に特性が異なることから、一般には施工内容により、より有用な重機を使用していた。また、現場造成杭により基礎杭を施工する業者と、既製杭を使用して基礎杭を施工する業者とは、異なる業者となっていた。また、重機は、掘削ヘッドを取り付けるオーガーを昇降させるやぐらを組み立てる際に、1〜2日を要し、杭打ち施工期間に重機を入れ替えることは工程の無駄を生じるので、この点からも1つの現場では、現場造成杭か既製杭かいずれかの工法を選択して採用していた。 (2) In addition, considering the ground conditions at the construction site, it was decided whether to use foundation piles constructed on site, foundation piles using ready-made piles, or foundation piles to be applied to each construction site . In addition, since the characteristics are different for each heavy machine as described above, more useful heavy machines are generally used depending on the construction contents. Moreover, the contractor who constructs a foundation pile by a site-built pile and the contractor who constructs a foundation pile using a ready-made pile were different contractors. Also, heavy machinery takes 1-2 days when assembling the tower that raises and lowers the auger to which the excavation head is attached, and replacing heavy machinery during the pile driving construction period causes waste of the process. At the site, either the site-built pile or the ready-made pile was selected and adopted.

従って、油圧式駆動の重機と電気式駆動の重機は、1つ現場に対しては、いずれか一方が選択的に使用されることになり、両方の重機が同じ現場に配置されることはなかった。よって、夫々の重機の特徴を充分に生かすことができず、工期の短縮や基礎杭の品質が現状に留まっていた。   Therefore, one of hydraulic-driven heavy equipment and electric-driven heavy equipment is selectively used for one site, and both heavy machinery are not placed on the same site. It was. Therefore, the features of each heavy machine could not be fully utilized, and the shortening of the construction period and the quality of the foundation pile remained at the present conditions.

然るにこの発明は、電気式の重機と油圧式の重機とを組み合わせて1本の基礎杭を構築するので、両重機の特徴をいかして前記問題点を解決した。   However, in the present invention, since one foundation pile is constructed by combining an electric heavy machine and a hydraulic heavy machine, the above-mentioned problems have been solved by making use of the characteristics of both heavy machines.

即ち、この発明は、「以下の手順をとり、杭穴の中間部又は底部に拡径部を形成する杭穴を掘削して基礎杭を構築することを特徴とする基礎杭の構築方法である。
(1) 杭穴掘削位置に、杭穴軸部径に対応する第一掘削ヘッドを取り付けた連続掘削可能な重機(以下「第一重機」)と、杭穴拡径部径に対応する第二掘削ヘッドを取り付けた大径掘削可能な重機(以下「第二重機」)とを配置する。
(2) 杭穴掘削位置に、前記第一重機の第一掘削ヘッドを置き、前記第一掘削ヘッドで杭穴軸部を掘削する。この際、掘削しながら深さ方向の掘削データを蓄積して第一掘削データとし、かつリアルタイムに表示する。
(3) 杭穴の軸部掘削完了後に第一ヘッドを掘削中の杭穴から地上に取り出す。
(4) 続いて、前記掘削途中の杭穴に、前記第二重機の第二掘削ヘッドを挿入して、拡大掘削位置まで下降させて、所定位置に拡径掘削をして、拡径部を有する杭穴を構築し、前記第二掘削ヘッドを地上に上げる。この際、掘削しながら深さ方向の掘削データを蓄積して第二掘削データとし、前記第一掘削データと前記第二掘削データとを、深さ方法を合わせて、1つの基礎杭構築に使用した統合掘削データを作成して、表示する。
(5) 続いて、前記杭穴内に、セメント固化物と共に既製杭を設置し、基礎杭を構築する。
That is, this invention is a construction method of a foundation pile characterized in that the foundation pile is constructed by excavating a pile hole that forms an enlarged diameter portion at the middle or bottom of the pile hole by taking the following procedure. .
(1) A heavy machine capable of continuous excavation (hereinafter referred to as “first heavy machine”) with a first excavation head corresponding to the diameter of the pile hole shaft at the pile hole excavation position, and a second corresponding to the diameter of the enlarged diameter part of the pile hole A heavy machine capable of excavating large diameters (hereinafter referred to as “second double machine”) equipped with a drilling head is arranged.
(2) Place the first excavation head of the first heavy machine at the pile hole excavation position and excavate the pile hole shaft with the first excavation head. At this time, the excavation data in the depth direction is accumulated while excavating and used as the first excavation data and displayed in real time.
(3) After the excavation of the shaft part of the pile hole, the first head is taken out from the pile hole being excavated to the ground.
(4) Subsequently, the second excavation head of the second double machine is inserted into the pile hole in the middle of excavation, and is lowered to the enlarged excavation position. A pile hole is constructed and the second excavation head is raised to the ground. At this time, the excavation data in the depth direction is accumulated while excavating and used as the second excavation data, and the first excavation data and the second excavation data are used for one foundation pile construction by combining the depth methods. Create and display integrated drilling data.
(5) Then, before the Kikuiana, the already-made pile installed in cement solidified co, constructing a foundation pile.

また、他の発明は、以下のようにして、杭穴を掘削して基礎杭を構築することを特徴とする基礎杭の構築方法である。
(1) 杭穴掘削位置に、杭穴軸部径に対応する第一掘削ヘッドを取り付けた連続掘削可能な重機(以下「第一重機」)と、杭穴拡径部径に対応する第二掘削ヘッドを取り付けた大径掘削可能な重機(以下「第二重機」)とを配置する。
(2) 杭穴掘削位置に、前記第一重機の第一掘削ヘッドを置き、前記第一掘削ヘッドで、所定の杭穴軸部径より小さな径で小径杭穴軸部を掘削する。この際、掘削しながら深さ方向の掘削データを蓄積して第一掘削データとし、かつリアルタイムに表示する。
(3) 杭穴の小径杭穴軸部を掘削完了後に第一ヘッドを掘削中の杭穴から地上に取り出す。
(4) 続いて、前記掘削途中の杭穴に、前記第二重機の第二掘削ヘッドを挿入して、前記小径杭穴軸部を拡張して所定径の杭穴軸部を掘削して、杭穴を構築し、前記第二掘削ヘッドを地上に上げる。この際、掘削しながら深さ方向の掘削データを蓄積して第二掘削データとし、前記第一掘削データと前記第二掘削データとを、深さ方法を合わせて、1つの基礎杭構築に使用した統合掘削データを作成して、表示する。
(5) 続いて、前記杭穴内に、セメント固化物と共に、既製杭を設置し、基礎杭を構築する。
Moreover, another invention is the construction method of a foundation pile characterized by excavating a pile hole and constructing a foundation pile as follows.
(1) A heavy machine capable of continuous excavation (hereinafter referred to as “first heavy machine”) with a first excavation head corresponding to the diameter of the pile hole shaft at the pile hole excavation position, and a second corresponding to the diameter of the enlarged diameter part of the pile hole A heavy machine capable of excavating large diameters (hereinafter referred to as “second double machine”) equipped with a drilling head is arranged.
(2) The first excavation head of the first heavy machine is placed at the pile hole excavation position, and the first excavation head excavates the small-diameter pile hole shaft portion with a diameter smaller than a predetermined pile hole shaft diameter. At this time, the excavation data in the depth direction is accumulated while excavating and used as the first excavation data and displayed in real time.
(3) After the completion of excavation of the small-diameter pile hole shaft of the pile hole, the first head is taken out from the pile hole being excavated to the ground.
(4) Subsequently, by inserting the second excavation head of the second double machine into the pile hole in the middle of excavation, expanding the small diameter pile hole shaft portion to excavate the pile hole shaft portion of a predetermined diameter, A pile hole is constructed and the second excavation head is raised to the ground. At this time, the excavation data in the depth direction is accumulated while excavating and used as the second excavation data, and the first excavation data and the second excavation data are used for one foundation pile construction by combining the depth methods. Create and display integrated drilling data.
(5) Then, before the Kikuiana, with cement solidified product was installed already made piles to build the foundation pile.

また、前記において、以下のようにして、杭穴を掘削する基礎杭の構築方法である。
(1) 第二重機に、杭穴軸部径と拡径部径の両方の径に対応した第二掘削ヘッドを装着し、該第二掘削ヘッドの小径側で前記杭穴軸部を所定の径に拡大して掘削する。
(2) 続いて、第二掘削ヘッドを拡大掘削位置まで下降させて、前記第二掘削ヘッドの大径側で、所定位置に拡径掘削をして、拡径部を有する杭穴を構築し、前記第二掘削ヘッドを地上に上げる。
Moreover, in the above, it is a construction method of the foundation pile which excavates a pile hole as follows.
(1) A second excavation head corresponding to both the diameter of the pile hole shaft and the expanded diameter is attached to the second double machine, and the pile hole shaft is attached to a predetermined diameter on the small diameter side of the second excavation head. Drill to expand to diameter.
(2) Subsequently, the second excavation head is lowered to the enlarged excavation position, and on the large diameter side of the second excavation head, diameter expansion excavation is performed at a predetermined position to construct a pile hole having an enlarged diameter portion. , Raise the second drilling head to the ground.

また、前記において、一の杭穴掘削位置で、第二の重機を操作している間、第一の重機を他の杭穴掘削位置に移動し、第一掘削ヘッドで杭穴の軸部を掘削する基礎杭の構築方法である。   Further, in the above, while operating the second heavy machine at one pile hole excavation position, the first heavy machine is moved to another pile hole excavation position, and the shaft portion of the pile hole is moved by the first excavation head. This is a construction method for excavating foundation piles.

また、前記において、以下のように構成した第一重機及び第二重機を使用する基礎杭の構築方法である。
(1) 前記第一重機を、柱状のやぐらを昇降する電気式の回転駆動機を設置し、該回転駆動機の下端に掘削ロッドの上端を着脱自在とした。
(2) 前記第二重機を、クレーン式のやぐらに油圧式の回転駆動機を設置し、該回転駆動機に掘削ロッドを装着した。
Moreover, it is the construction method of the foundation pile which uses the 1st heavy machine and the 2nd double machine which were comprised as follows in the above.
(1) The first heavy machine is provided with an electric rotary drive that moves up and down a columnar tower, and the upper end of the excavation rod is detachably attached to the lower end of the rotary drive.
(2) A hydraulic rotary drive machine was installed in the crane type tower with the second double machine, and a drilling rod was attached to the rotary drive machine.

前記における「連続掘削可能な重機」とは、掘削ロッド(下端に掘削ヘッドを装着してある)を取り付けて回転駆動するオーガーが、垂直方向に昇降することができるように取りつけられた重機で、オーガーを最上位置から最下位置に移動する範囲で連続して掘削ができる。また、掘削ロッドを継ぎ足すことが容易で、掘削ロッドを継ぎ足しながら深い位置まで掘削ヘッドを入れて連続して深い杭穴を掘削できる重機をいう。深い杭穴とは、例えば、30〜60m程度の深さまで掘削が可能な重機をいう。現状の重機では、例えば、いわゆるパイルドライバーといわれ、垂直自立式の重機で、柱状のやぐらを昇降するオーガーを持つ構造である。この場合、オーガーは、現状では、電気式駆動であることが多い。   The above-mentioned “heavy machine capable of continuous excavation” is a heavy machine attached so that an auger that is driven to rotate by attaching a drilling rod (with a drilling head attached to the lower end) can be moved up and down in the vertical direction, The excavator can be continuously excavated as long as the auger moves from the uppermost position to the lowermost position. Further, it means a heavy machine that can easily add a drilling rod and can continuously drill a deep pile hole by inserting a drilling head to a deep position while adding a drilling rod. A deep pile hole means the heavy machinery which can be excavated to the depth of about 30-60m, for example. The current heavy machinery is, for example, a so-called pile driver, and is a vertically self-supporting heavy machinery having a structure that has an auger that moves up and down a columnar tower. In this case, the auger is often electrically driven at present.

また、前記における「大径掘削可能な重機」とは、「連続掘削可能な重機」に比して大径掘削が可能な重機をいい、大径の掘削ロッド(下端に掘削ヘッドを装着してある)を装着できるオーガーを装備してある構造である。大径とは、120〜400cm程度の掘削を可能とする構造である。現状の重機では、例えば、アースドリル工法などに使用するクレーン式の重機などが該当する。この場合、オーガーは、現状では、油圧式駆動であることが多い。   The “heavy machine capable of large-diameter drilling” in the above refers to a heavy machine capable of large-diameter drilling compared to “heavy machine capable of continuous drilling”. It has a structure equipped with an auger that can be installed. The large diameter is a structure that enables excavation of about 120 to 400 cm. In the current heavy machinery, for example, a crane-type heavy machinery used for an earth drill method or the like is applicable. In this case, the auger is often hydraulically driven at present.

この発明は「連続掘削可能な重機」で杭穴の軸部を掘削するので、掘削速度が速く、深い基礎杭の場合であっても、「大径掘削可能な重機」を使用する場合に比べて、早く掘削をすることができる。また、杭穴の軸部を掘削した後で、「大径掘削可能な重機」を使用して、杭穴の拡径部を掘削するので、「連続掘削可能な重機」のみで掘削をする場合に比べて、大径の掘削が可能である。従って、両重機を単独で使用するよりも、重機の特徴を最大限に生かして、効率的な杭穴掘削、基礎杭の構築ができ、総体として、基礎杭の質を高め、工期の短縮を図ることができる効果がある。   Since this invention excavates the shaft part of a pile hole with a “heavy machine capable of continuous excavation”, the excavation speed is high, even in the case of deep foundation piles, compared to the case of using “a heavy machine capable of excavating large diameters”. Can be excavated quickly. In addition, after excavating the shaft part of the pile hole, the "large machine capable of excavating large diameter" is used to excavate the enlarged part of the pile hole, so when excavating only with "heavy machine capable of continuous excavation" Compared with, drilling of large diameter is possible. Therefore, it is possible to efficiently excavate pile holes and build foundation piles by making the most of the characteristics of heavy machinery, rather than using both heavy machinery alone, and as a whole, improve the quality of foundation piles and shorten the construction period. There is an effect that can be achieved.

また、「連続掘削可能な重機」と「大径掘削可能な重機」とを、同じ構築現場で、異なる杭穴掘削位置で同時に使用することもできるので、この場合には、更に効率的な杭穴掘削、基礎杭の構築が可能である。   Also, “heavy machinery capable of continuous excavation” and “heavy machinery capable of large-diameter excavation” can be used at the same construction site and at different pile hole excavation positions at the same time. Drilling holes and building foundation piles are possible.

(1) この発明は、連続掘削可能な重機と、大径掘削可能な重機と、を使用して、拡径部24を有する杭穴22を掘削することを特徴とする(図1(a)〜(d))。拡径部24は、通常は杭穴22の底部に形成するが、中間部、杭頭部など求める基礎杭の性能により適宜選択する。また、複数位置に拡径部24を形成することもできる。 (1) This invention is characterized by excavating a pile hole 22 having an enlarged diameter portion 24 using a heavy machine capable of continuous excavation and a heavy machine capable of large-diameter excavation (FIG. 1A). To (d)). The enlarged diameter portion 24 is usually formed at the bottom of the pile hole 22, but is appropriately selected depending on the required performance of the foundation pile such as an intermediate portion and a pile head. Moreover, the enlarged diameter part 24 can also be formed in several positions.

連続掘削可能な重機は、いわゆる電気式の重機4で、電気式に駆動するオーガー6に軸部23掘削用の第一掘削ヘッド10を取り付けた掘削ロッド8を装着する(図1(a))。オーガー6は柱状のやぐら5のほぼ全長に亘り昇降することができるので、昇降可能な範囲で第一掘削ロッド10を継ぎ足して、ロッドを交換することなく、第一掘削ロッド10を長くすることができるので、連続掘削できる。   A heavy machine capable of continuous excavation is a so-called electric heavy machine 4 in which an excavation rod 8 having a first excavation head 10 for excavating the shaft portion 23 is attached to an auger 6 that is electrically driven (FIG. 1A). . Since the auger 6 can move up and down over almost the entire length of the columnar tower 5, the first drilling rod 10 can be lengthened without replacing the rod by adding the first drilling rod 10 within the range in which the auger 6 can be moved up and down. Because it can, continuous excavation is possible.

大径掘削可能な重機は、いわゆる油圧式の重機14で、クレーン式のやぐら15に油圧駆動式のオーガー16を取り付けて構成する。オーガー16の先端に、拡径掘削用の第二掘削ヘッド20を取り付けた掘削ロッド18を装着する。また、油圧式の重機は14は、伸縮可能な掘削ロッド18を伸ばして、第二掘削ロッド18の長さを長くできる。   A heavy machine capable of excavating large diameters is a so-called hydraulic heavy machine 14, which is configured by attaching a hydraulically driven auger 16 to a crane type tower 15. The excavation rod 18 to which the second excavation head 20 for expanded diameter excavation is attached is attached to the tip of the auger 16. Further, the hydraulic heavy machine 14 can extend the length of the second drilling rod 18 by extending the extendable drilling rod 18.

油圧式のオーガー16は、大径掘削ができるような大形で重量が多いものは、柱状のやぐら5に装着することができない。   The hydraulic auger 16 that is large and capable of excavating large diameters cannot be mounted on the columnar tower 5.

例えば、両オーガー6、16の能力を比較すると、以下の表1のようになる。

Figure 0004831511
For example, when the abilities of both augers 6 and 16 are compared, the following Table 1 is obtained.
Figure 0004831511

(2) 現場敷地内で、第一杭穴構築位置2の近くに、第一掘削ヘッド10を備えた電気式の重機4と、第二掘削ヘッド20を備えた油圧式の重機14とを待機させる(図4(a))。 (2) Within the site site, near the first pile hole construction position 2, an electric heavy machine 4 with the first excavation head 10 and a hydraulic heavy machine 14 with the second excavation head 20 are on standby. (FIG. 4A).

まず、電気式の重機4を移動して、第一杭穴構築位置Aに第一掘削ヘッド10を合わせて、従来の方法により第一掘削ヘッド10で、径Dの杭穴22の軸部23を掘削する(図1(a)、図4(b))。軸部23の掘削が完了したならば、杭穴22から第一掘削ヘッド10を撤去し、電気式の重機4を杭穴22から移動させる(図1(b))。 First, by moving the heavy equipment 4 of the electric, the first pile hole build position A 1 and the combined first excavation head 10, a first excavation head 10 in a conventional manner, the axis of Kuiana 22 of diameter D 0 The part 23 is excavated (FIGS. 1A and 4B). When the excavation of the shaft portion 23 is completed, the first excavation head 10 is removed from the pile hole 22 and the electric heavy machine 4 is moved from the pile hole 22 (FIG. 1B).

続いて、油圧式の重機14を移動して、第一杭穴構築位置A(即ち、杭穴22の位置)に、第二掘削ヘッド20を合わせて、杭穴22の軸部23に第二掘削ヘッド20を挿入し、所定位置で、杭穴22の径を拡大して、径Dの拡径部を必要箇所に形成する(図1(c)、図4(c))。必要な拡径部24を完成させたならば、杭穴22から第二掘削ヘッド20を引き上げる(図1(d))。 Subsequently, the hydraulic heavy machine 14 is moved, the second excavation head 20 is aligned with the first pile hole construction position A 1 (that is, the position of the pile hole 22), and the shaft portion 23 of the pile hole 22 is moved to the first position. insert two drilling heads 20, at a predetermined position, an enlarged diameter of Kuiana 22 to form a necessary part of the enlarged diameter portion of diameter D 1 (FIG. 1 (c), the Figure 4 (c)). When the necessary enlarged diameter portion 24 is completed, the second excavation head 20 is pulled up from the pile hole 22 (FIG. 1 (d)).

(3) 以上のようにして、拡径部24を有する杭穴22を形成する(図1(d))。この杭穴22は、大きさ、性能などを調節して、
(a) 既製杭28を埋設する杭穴22、
(b) 現場造成杭として鉄筋かご34を挿入してコンクリートを充填する杭穴22、
のいずれに適用することができる。
(3) As described above, the pile hole 22 having the enlarged diameter portion 24 is formed (FIG. 1D). This pile hole 22 is adjusted in size, performance, etc.
(a) Pile hole 22 for burying ready-made pile 28,
(b) Pile holes 22 for inserting concrete bars 34 and filling concrete as on-site piles;
It can be applied to either.

尚、軸部23の全長に亘り電気式の重機4で掘削する場合の他、小さめの径で電気式の重機4で掘削をした後に、油圧式の重機14で杭穴壁を拡張するように拡大して軸部23を完成させることもできる。例えば、径150cmを重機4で掘削して、重機14で径200cmに拡大する。   In addition to excavating with the electric heavy machine 4 over the entire length of the shaft portion 23, after excavating with the electric heavy machine 4 with a smaller diameter, the pile hole wall is expanded with the hydraulic heavy machine 14 The shaft portion 23 can be completed by enlarging. For example, a diameter of 150 cm is excavated by the heavy machine 4 and enlarged by the heavy machine 14 to a diameter of 200 cm.

(4) 既製杭28を埋設する工法では、電気式の重機4から掘削ロッド8を取り外し、既製杭28を保持する保持具26を装着して、保持具26に既製杭28の上端を係止する(図2(a))。また、重機4を使用せずに、従来の方法により、他の重機類を使用して、既製杭を埋設することもできる。 (4) In the method of burying the ready-made pile 28, the excavating rod 8 is removed from the electric heavy machine 4, the holding tool 26 that holds the ready-made pile 28 is attached, and the upper end of the ready-made pile 28 is locked to the holding tool 26. (FIG. 2A). Moreover, a ready-made pile can also be embed | buried using another heavy machinery by the conventional method, without using the heavy machinery 4. FIG.

以下、従来の方法により、必要ならば継ぎ足しながら、既製杭28を杭穴22内に埋設する(図2(a))。既製杭28の構造、材料も任意であり、コンクリート杭、鋼管杭、鋼管被覆コンクリート杭など任意であり、コンクリート杭もいわゆるストレート杭、節杭など任意である。   Hereinafter, the ready-made pile 28 is embedded in the pile hole 22 by adding a conventional method if necessary (FIG. 2A). The structure and material of the ready-made pile 28 are also arbitrary, and a concrete pile, a steel pipe pile, a steel pipe covering concrete pile, etc. are arbitrary, and a concrete pile is also arbitrary, such as what is called a straight pile and a joint pile.

また、杭穴22内に充填する根固め液、杭周固定液などを使用するか否か、充填方法、時期なども任意であり、従来の各方法を採用できる。例えば、第二掘削ヘッド20を引き上げる際に、第二掘削ヘッドの吐出口から根固め液などを吐出することもできる。以上のようにして、基礎杭30を構築する(図2(b))。   In addition, whether or not to use a root hardening liquid, a pile circumference fixing liquid, or the like to be filled in the pile hole 22 is arbitrary, and a filling method, a timing, and the like are arbitrary, and each conventional method can be adopted. For example, when the second excavation head 20 is pulled up, a root hardening liquid or the like can be discharged from the discharge port of the second excavation head. The foundation pile 30 is constructed as described above (FIG. 2B).

また、既製杭28を埋設後に、電気式の重機4に保持したまま、根固め液が固化するなど既製杭28が安定するまで保持することもできるが、既製杭28の埋設が完了したならば、保持具26ごと既製杭28を重機4のオーガー6から取り外して、杭穴22開口部25付近の地面1に別の治具を設置して、既製杭28の上端部を保持することもできる。   In addition, after burying the ready-made pile 28, the electric pile 4 can be held until the ready-made pile 28 is stabilized, for example, the root-setting liquid is solidified. The ready-made pile 28 together with the holding tool 26 can be removed from the auger 6 of the heavy machinery 4 and another jig can be installed on the ground 1 near the opening 25 of the pile hole 22 to hold the upper end of the ready-made pile 28. .

この場合には、電気式の重機4を次の第二杭穴掘削位置に移動して、第一掘削ロッド8を装着して、第二掘削位置で杭穴22の軸部23の掘削ができるので、重機4を効率的に運用できる。   In this case, the electric heavy machine 4 is moved to the next second pile hole excavation position, the first excavation rod 8 is attached, and the shaft portion 23 of the pile hole 22 can be excavated at the second excavation position. Therefore, the heavy equipment 4 can be operated efficiently.

(5) また、鉄筋かご34を使用して、現場造成で基礎杭を構築する工法では、電気式の重機4から掘削ロッド8を取り外し、重機4に鉄筋かご34を吊る吊り下げ具(例えば、ワイヤー等)32を装着して、吊り下げ具32に鉄筋かご34の上端を係止する(図3(a))。また、重機4を使用せずに、従来の方法により、他の重機類を使用して、既製杭を埋設することもできる。 (5) Moreover, in the construction method which constructs a foundation pile by site construction using the reinforcing bar 34, the excavating rod 8 is removed from the electric heavy machine 4, and the hanging tool (for example, hanging the reinforcing bar 34 to the heavy machine 4 (for example, A wire or the like) 32 is attached, and the upper end of the reinforcing bar 34 is locked to the hanging tool 32 (FIG. 3A). Moreover, a ready-made pile can also be embed | buried using another heavy machinery by the conventional method, without using the heavy machinery 4. FIG.

以下、従来の方法により、必要ならば鉄筋かご34を継ぎ足しながら、杭穴22内に埋設する(図3(a))。鉄筋かご34を杭穴22に入れた後、あるいは鉄筋かご34を入れる前に、トレミー管などを杭穴22に挿入して、杭穴22内にコンクリートを充填する。尚、鉄筋かご34の構造、コンクリートの材料等も従来のものを採用して、任意である。以上のようにして、基礎杭36を構築する(図2(b))。   Thereafter, the steel bar 34 is embedded in the pile hole 22 by adding a reinforcing bar 34 if necessary (FIG. 3A). After the rebar cage 34 is inserted into the pile hole 22 or before the rebar cage 34 is inserted, a tremy tube or the like is inserted into the pile hole 22 to fill the pile hole 22 with concrete. In addition, the structure of the reinforcing bar 34, the material of the concrete, etc. are adopted as conventional ones. The foundation pile 36 is constructed as described above (FIG. 2B).

鉄筋かご34及びコンクリートを杭穴22内に入れた後、電気式の重機4でコンクリートが固化発現して鉄筋かご34が安定するまで保持することもできるが、吊り下げ具32ごと重機4から分離して、杭穴22開口部25付近の地面1に別の治具を設置して、鉄筋かご32の上端部を保持することもできる。   After putting the rebar cage 34 and concrete into the pile hole 22, the electric heavy machine 4 can hold the concrete until it is solidified and the rebar car 34 is stabilized, but the hanging tool 32 is separated from the heavy machine 4. Then, another jig can be installed on the ground 1 near the opening 25 of the pile hole 22 to hold the upper end of the reinforcing bar 32.

この場合には、電気式の重機4を次の第二杭穴掘削位置に移動して、第一掘削ロッド8を装着して、第二掘削位置Aで杭穴22の軸部23の掘削ができるので、重機4を効率的に運用できる。 In this case, by moving the heavy equipment 4 of the electric Secondly pile hole drilling position of the next, by mounting the first drill rod 8, drilling the shaft portion 23 of the Kuiana 22 at a second drilling site A 2 Therefore, the heavy equipment 4 can be operated efficiently.

(6) (1)〜(5)において、電気式の重機4の作業時間と油圧式の重機14の作業時間に大幅な差がある場合には、例えば、電気式の重機4を3台導入し、油圧式の重機14を2台導入するなど、効率的な施工計画を立てることができる。 (6) In (1) to (5), if there is a significant difference between the work time of the electric heavy machine 4 and the work time of the hydraulic heavy machine 14, for example, three electric heavy machines 4 are introduced. In addition, an efficient construction plan can be made, such as introducing two hydraulic heavy machines 14.

(7) (1)〜(5)において、電気式の重機4を使用して杭穴掘削をしている間に、深さ方向の掘削速度、掘削径、電気量、注入掘削液量、N値等を比較しつつデータを蓄積し、かつ処理した掘削データを保存し、リアルタイムに表示する。 (7) In (1) to (5), while excavating a pile hole using the electric heavy machine 4, the excavation speed in the depth direction, the excavation diameter, the amount of electricity, the amount of injected excavation fluid, N Data is accumulated while comparing values, etc., and the processed excavation data is stored and displayed in real time.

また、重機14を使用した掘削作業においても同様に、掘削データを保存し、リアルタイムに表示する。   Similarly, in excavation work using the heavy machinery 14, excavation data is stored and displayed in real time.

両重機4の掘削データに、深さ方向を合わせて、重機14により掘削データを重ね合わせて、1つの基礎杭構築に使用した統合掘削データを作成して、表示する。この際、重機14による掘削データは、地盤性状等に対応して補正する。   The excavation data of both heavy machinery 4 is aligned with the depth direction, and the excavation data is superposed by the heavy machinery 14 to create and display integrated excavation data used for constructing one foundation pile. At this time, the excavation data by the heavy machine 14 is corrected in accordance with the ground properties and the like.

図1、図2に基づき、この発明の実施例を説明する。この実施例は、既製杭28を使用した基礎杭の構築方法である。   An embodiment of the present invention will be described with reference to FIGS. This embodiment is a foundation pile construction method using ready-made piles 28.

(1) 地面1の第一の杭穴構築位置Aを挟んで両側に、杭穴22の軸部23の径Dに対応した第一掘削ヘッド10を装着した電気式の重機4と、杭穴22の拡底部24の径Dに対応した第二掘削ヘッド20を装着した油圧式の重機14とを、配置する(図4(a))。第一掘削ヘッド10は第一掘削ロッド8の下端に連結し、第一掘削ロッド8は、例えば、軸部には杭穴壁を練り付けることができる均し用のドラムや杭穴撹拌用の突起が取り付けてある(図1(a))。また、第二掘削ヘッド20は、第二掘削ロッド18の先端に取り付けてあり(図1(c))、第二掘削ロッド18は例えば伸縮延長可能なロッドである。 (1) on both sides of the first pile hole build position A 1 of the ground 1, the electric heavy equipment 4 with a first drilling head 10 is mounted corresponding to the diameter D 0 of the shaft portion 23 of the Kuiana 22, a hydraulic heavy equipment 14 where the second drilling head 20 is mounted corresponding to the diameter D 1 of the拡底portion 24 of Kuiana 22, arranged (Figure 4 (a)). The first excavation head 10 is connected to the lower end of the first excavation rod 8, and the first excavation rod 8 is used for, for example, a leveling drum or a pile hole agitation which can knead a pile hole wall on the shaft portion. A protrusion is attached (FIG. 1A). Moreover, the 2nd excavation head 20 is attached to the front-end | tip of the 2nd excavation rod 18 (FIG.1 (c)), and the 2nd excavation rod 18 is a rod which can be extended-contracted, for example.

ここで、第一掘削ヘッド10、第二掘削ヘッド20の構造はいずれも、掘削ロッド8、18に連結するヘッド本体の両側に、先端に掘削刃を有する掘削腕を揺動自在に取り付けて構成する(図1(a)(c))。しかし、この構造が望ましいが、これに限定されない。   Here, each of the structures of the first excavation head 10 and the second excavation head 20 is configured such that excavation arms having excavation blades at the tips are swingably attached to both sides of the head main body connected to the excavation rods 8 and 18. (FIGS. 1A and 1C). However, although this structure is desirable, it is not limited to this.

尚、重機4、14の配置は両側、即ち第一の杭穴構築位置Aを中心として180°の位置としたが、上記に限らず、90°の位置や、同一位置(=0°)等任意であり、要は、一方の重機4、14を使った作業中に他の重機14、4がじゃまにならなければ良い。 The arrangement of heavy equipment 4 and 14 on both sides, i.e. has been the position of 180 ° the first pile hole build position A 1 as the center, not limited to the above, the position and the 90 °, the same position (= 0 °) In other words, it is only necessary that the other heavy machine 14 or 4 does not get in the way during the work using one heavy machine 4 or 14.

電気式の重機4は、柱状のやぐら5を昇降するオーガー6に、掘削ロッド8の上端を取付けし、掘削ロッド8の下端に第一掘削ヘッド10を取り付けてある。掘削ロッド8、即ち第一掘削ヘッド10はオーガー(回転駆動機)6により正逆回転自在となっている(図1(a)、図4(a))。   In the electric heavy machine 4, an upper end of a drilling rod 8 is attached to an auger 6 that moves up and down a columnar tower 5, and a first drilling head 10 is attached to the lower end of the drilling rod 8. The excavation rod 8, that is, the first excavation head 10 can be rotated forward and backward by an auger (rotary drive machine) 6 (FIGS. 1 (a) and 4 (a)).

油圧式の重機14も、クレーン式のやぐら15を昇降するオーガー(回転駆動機)16に、掘削ロッド18の上端を取付けし、掘削ロッド18の下端に第二掘削ヘッド20を取り付けてある。掘削ロッド18、即ち第二掘削ヘッド20はオーガー16により正逆回転自在となっている(図1(c)、図4(a))。   The hydraulic heavy machine 14 also has an auger (rotary drive machine) 16 that lifts and lowers a crane-type tower 15 attached with an upper end of a drilling rod 18 and a second drilling head 20 attached to the lower end of the drilling rod 18. The excavation rod 18, that is, the second excavation head 20 can be rotated forward and backward by the auger 16 (FIGS. 1C and 4A).

(2) 第一の杭穴構築位置Aの上方に、第一掘削ヘッド10が位置するように、電気式の重機4を矢示方向38に移動させる(図4(b))。 (2) the first upper pile hole build position A 1, as the first excavation head 10 is positioned to move the heavy equipment 4 of the electric in the arrowed direction 38 (Figure 4 (b)).

電気式の重機4のオーガー6を正回転しつつ、下降させて、径Dで、深さHの杭穴22の軸部23を構築する(図1(a))。杭穴22の深さHが、やぐら5の高さに比して深い場合には、通常の方法により掘削ロッド8を継ぎ足しながら、掘削する。 While forward rotation auger 6 heavy equipment 4 of the electric, is lowered, with diameter D 0, constructing the shaft portion 23 of Kuiana 22 depth H 0 (Figure 1 (a)). When the depth H 0 of the pile hole 22 is deeper than the height of the tower 5, excavation is performed while adding the excavating rod 8 by a normal method.

杭穴22の軸部23の掘削が完了次第(図1(b))、継ぎ足した掘削ロッド8、8を取り外しにながら第一掘削ヘッド10を地上1に引き上げ、電気式の重機4を、第一掘削ヘッド10を装着したまま(この状態で、掘削ロッド8は最低限の長さにある)、第二の杭穴掘削位置3に移動させる(図4(c)、図3(c))。   As soon as the excavation of the shaft portion 23 of the pile hole 22 is completed (FIG. 1B), the first excavation head 10 is pulled up to the ground 1 while removing the excavated rods 8 and 8, and the electric heavy machine 4 is With the excavation head 10 mounted (in this state, the excavation rod 8 is at the minimum length), the excavation head 10 is moved to the second pile hole excavation position 3 (FIGS. 4 (c) and 3 (c)). .

(3) 続いて、第一の杭穴構築位置A(杭穴22の軸部23)の上方に、第二掘削ヘッド20が位置するように、油圧式の重機14を移動させる(図4(c))。 (3) Subsequently, the hydraulic heavy machine 14 is moved so that the second excavation head 20 is positioned above the first pile hole construction position A 1 (the shaft portion 23 of the pile hole 22) (FIG. 4). (C)).

油圧式の重機14のオーガー16を下降させて、第二掘削ヘッド20を杭穴22の軸部23の底に位置させ、オーガー16を逆回転して、杭穴22の底部を深さHに亘り押し広げるように掘削して、径Dで、深さHの杭穴22の拡底部24を構築する(図2(c))。 The auger 16 of the hydraulic heavy machine 14 is lowered, the second excavation head 20 is positioned at the bottom of the shaft portion 23 of the pile hole 22, the auger 16 is rotated in the reverse direction, and the bottom portion of the pile hole 22 has a depth H 1. drilling to as pushing over, with diameter D 1, to build拡底portion 24 of Kuiana 22 of depth H 1 (FIG. 2 (c)).

杭穴22の拡底部24の掘削が完了次第(図2(d))、第二掘削ヘッド20を地上1に引き上げる。   As soon as the excavation of the bottom expanded portion 24 of the pile hole 22 is completed (FIG. 2D), the second excavation head 20 is pulled up to the ground 1.

尚、前記において、第一掘削ヘッド10を使って、径Dで深さ「H−H」の杭穴を掘削して、第二掘削ヘッド20を使って、径Dで深さHの杭穴の拡底部24を構築することもできる(図示していない)。 In the above description, the first excavation head 10 is used to excavate a pile hole having a diameter “D 0 ” and a depth “H 0 -H 1 ”, and the second excavation head 20 is used to obtain a depth D 1. It is also possible to build the bottomed portion 24 of the H 1 pile hole (not shown).

(4) 通常の方法により、杭穴22の拡底部24内には根固め液(富配合のセメントミルク)を充填し、杭穴22の軸部23には杭周固定液(貧配合のソイルセメント)を充填する。例えば、第二掘削ヘッド20を引き上げる際に、各深さに根固め液、杭周固定液を充填することもでき、あるいは、前記第一第二ヘッド10、20とは別に、パイプ類を杭穴22内に挿入して根固め液、杭周固定液を充填することもできる(図示していない)。 (4) By the usual method, the bottom enlarged portion 24 of the pile hole 22 is filled with a root hardening liquid (rich blended cement milk), and the shaft portion 23 of the pile hole 22 is filled with a pile circumference fixing solution (poor blended soil). Fill with cement. For example, when pulling up the second excavation head 20, it is possible to fill each depth with a root hardening liquid and a pile circumference fixing liquid, or separately from the first second heads 10 and 20, pipes are piled. It can be inserted into the hole 22 and filled with a root hardening liquid and a pile circumference fixing liquid (not shown).

(5) 油圧式の重機14を使用して第一の杭穴構築位置2で(3)(4)の作業(杭穴22の拡底部24の掘削)をしている間に、電気式の重機4を第二の杭穴構築位置Aに移動して、第二の杭穴構築位置Aで電気式の重機4を使用して同様に(2)の作業(杭穴22の軸部23の掘削)を行う(図4(c))。一般に、(2)の作業工程に要する時間と、(3)〜(4)の作業工程に要する時間は、同程度であるので、電気式の重機4と油圧式の重機14とに無駄がなく、効率的に作動させて、基礎杭30の構築を効率良くできる。 (5) While performing the operations (3) and (4) (excavation of the bottom expanded portion 24 of the pile hole 22) at the first pile hole construction position 2 using the hydraulic heavy machine 14, the electric type move the heavy equipment 4 to the second pile hole build position a 2, the shaft portion of the second work similarly, using heavy equipment 4 of the electric (2) pile-hole build position a 2 (Kuiana 22 23 is excavated) (FIG. 4C). In general, the time required for the work process (2) and the time required for the work processes (3) to (4) are approximately the same, so there is no waste in the electric heavy machine 4 and the hydraulic heavy machine 14. The foundation pile 30 can be efficiently constructed by operating efficiently.

(6) 続いて、(5)の作業が終わったならば、電気式の重機4を、再度、第一の杭穴構築位置Aに移動して、電気式の重機4から第一掘削ヘッド10を取り外し、電気式の重機4のオーガー6に既製杭28を保持する保治具(やっとこ)26を取り付け、既製杭28の上端を保持具26に支持する。そして、従来の方法により、杭穴22内に、既製杭28を埋設する(図4(d)、図2(a))。既製杭18は深さHに対応して、適宜連結して所定長さの既製杭28を構成する。 (6) Then, (5) if the work is finished, the heavy equipment 4 of the electric, again, go to the first pile hole build position A 1, the first drilling head from heavy machinery 4 of the electric 10 is removed, and a holding jig 26 for holding the ready-made pile 28 is attached to the auger 6 of the electric heavy machine 4, and the upper end of the ready-made pile 28 is supported by the holder 26. And the ready-made pile 28 is embed | buried in the pile hole 22 with the conventional method (FIG.4 (d), FIG.2 (a)). The ready-made pile 18 corresponds to the depth H 0 and is appropriately connected to form a ready-made pile 28 having a predetermined length.

尚、ここで、(5)の作業を行った重機4と同じ重機をそのまま移動して使用したが、第一掘削ロッド10の着脱の手間などを考慮して、他の電気式の重機4あるいは、既製杭28を埋設できる従来の他の重機を使用することもできる(図示していない)。   Here, the same heavy machine as the heavy machine 4 that performed the work of (5) was moved and used as it is. However, in consideration of the time for attaching and detaching the first excavation rod 10, other electric heavy machines 4 or Other conventional heavy machinery capable of burying the ready-made pile 28 can also be used (not shown).

(7) 続いて、(6)の作業が終わったならば(第一の杭穴構築位置Aで、既製杭28の埋設が完了した後)、電気式の重機4を第三の杭穴構築位置Aに移動すると共に、オーガー6から保持具26を取り外して掘削ロッド8及び第一掘削ヘッド10を装着する。前記(2)と同様に第三の杭穴構築位置Aで杭穴の軸部23を掘削する(図4(e))。 (7) Then, if the work (6) is finished (in the first pile hole build position A 1, after burying of the ready-made pile 28 has been completed), the heavy equipment 4 of the electric third Kuiana while it is moving to the build position a 3, mounting the drill rod 8 and the first excavation head 10 by removing the retainer 26 from the auger 6. Similarly to the above (2), the shaft portion 23 of the pile hole is excavated at the third pile hole construction position A3 (FIG. 4 (e)).

または、「(5)の第二の杭穴構築位置Aでの杭穴22の拡底部24の掘削作業」の進行に応じて、この作業と第二の杭穴構築位置Aでの既製杭28の埋設作業のいずれかを行う。 Or, in accordance with the progress of the "(5) drilling operations of拡底portion 24 of the second pile hole 22 in the pile hole build position A 2", ready for the task and the second pile hole build position A 2 One of the burial work of the pile 28 is performed.

(8) 電気式の重機4を使って、第一の杭穴構築位置Aで作業(6)、第三の杭穴構築位置Aで作業(7)をしている間に、油圧式の重機14を第二の杭穴構築位置Aに移動して、前記作業(3)(4)と同様の作業(杭穴拡底部の構築)を行う(図4(d)(e))。 (8) using heavy equipment 4 of the electric work in the first pile hole build position A 1 (6), while working (7) in a third Kuiana build position A 3, hydraulic the heavy machine 14 moves to the second pile hole build position a 2, the work (3) (4) same operation as (Kuiana building拡底part) is performed (FIG. 4 (d) (e)) .

(9) 第一の杭穴構築位置Aで、杭周固定液、根固め液が固化したならば、基礎杭30を構築する(図2(b)、図4(e))。 (9) If the pile circumference fixing liquid and the root hardening liquid are solidified at the first pile hole construction position A 1 , the foundation pile 30 is constructed (FIGS. 2B and 4E).

(10) 以下、順次各杭穴構築位置Aで、同様にして、杭穴22を掘削して既製杭28を埋設していく(図4(f))。 (10) Hereinafter, the pile holes 22 are excavated sequentially at each pile hole construction position A, and the ready-made piles 28 are buried (FIG. 4 (f)).

(11)他の実施例
前記実施例において、(2)で径Dで杭穴22の軸部23を掘削したが、以下のような手順で杭穴22を掘削することもできる。
・電気式の重機4で、第一掘削ヘッド10で、径D00(<D)で杭穴の軸部23に対応する杭穴を細く予備掘削する。ここで、径D00=D−(50〜300)cm 程度とする。
・油圧式の重機14で、第二掘削ヘッド20を正回転して径D00を径Dに押し広げるように掘削して杭穴22の軸部23を完成させる。
・続いて、油圧式の重機14の第二掘削ヘッド20を逆回転して、前記実施例と同様に、径Dの拡底部24を掘削する。
(11) Other embodiments The embodiment has been drilled shaft portion 23 of the Kuiana 22 in the radial D 0 (2), it is also possible to drill the pile hole 22 by the following procedures.
The electric heavy machine 4 is used for the first excavation head 10 to preliminarily excavate a pile hole corresponding to the shaft portion 23 of the pile hole with a diameter D 00 (<D 0 ). Here, the diameter D 00 = D 0 − (50 to 300) cm.
-With the hydraulic heavy machine 14, the second excavation head 20 is rotated forward to excavate the diameter D 00 so as to expand the diameter D 0 to complete the shaft portion 23 of the pile hole 22.
- Subsequently, by reversely rotating the second drilling head 20 of the heavy machinery 14 of hydraulic, as in the example, drilling拡底portion 24 of diameter D 1.

図1、図3、図4に基づき、この発明の実施例を説明する。この実施例は、鉄筋かご34を使用したいわゆる現場造成による基礎杭36の構築方法である。   An embodiment of the present invention will be described with reference to FIGS. This embodiment is a method for constructing a foundation pile 36 by so-called on-site construction using a reinforcing bar 34.

(1) 実施例1と同様に、地面1の第一の杭穴構築位置Aを挟んで両側に、杭穴22の軸部23の径Dに対応した第一掘削ロッド8(第一掘削ヘッド10)を装着した電気式の重機4と、杭穴22の拡底部24の径Dに対応した第二掘削ロッド18(第二掘削ヘッド20)を装着した油圧式の重機14と、を配置する(図4(a))。重機4、14の他の配置は両側、前記実施例1と同様である。 (1) in the same manner as in Example 1, on both sides of the first pile hole build position A 1 of the ground 1, the first drill rod 8 corresponding to the diameter D 0 of the shaft portion 23 of the Kuiana 22 (first and electric heavy equipment 4 fitted with drilling head 10), and a second drill rod 18 (second excavation head 20) hydraulic heavy equipment 14 equipped with corresponding to the diameter D 1 of the拡底portion 24 of Kuiana 22, Is arranged (FIG. 4A). Other arrangements of the heavy machines 4 and 14 are the same as those of the first embodiment on both sides.

電気式の重機4は、前記実施例1と同様に、柱状のやぐら5、オーガー6を有し、掘削ロッド8、第一掘削ヘッド10を取り付けてある。(図1(a)、図4(a))。   Similar to the first embodiment, the electric heavy machine 4 includes a columnar tower 5 and an auger 6, and a drilling rod 8 and a first drilling head 10 are attached thereto. (FIG. 1 (a), FIG. 4 (a)).

油圧式の重機14も、実施例1と同様に、クレーン式のやぐら15、オーガー16を有し、掘削ロッド18、第二掘削ヘッド20を取り付けてある(図1(c)、図4(a))。   Similarly to the first embodiment, the hydraulic heavy machine 14 also has a crane-type tower 15 and an auger 16, and is attached with a drilling rod 18 and a second drilling head 20 (FIGS. 1C and 4A). )).

(2) 実施例1と同様に、軸部23及び拡底部24を有する杭穴22を掘削する。 (2) The pile hole 22 having the shaft portion 23 and the expanded bottom portion 24 is excavated in the same manner as in the first embodiment.

即ち、第一の杭穴構築位置Aの上方に、第一掘削ヘッド10が位置するように、移動させる(図4(b))。電気式の重機4のオーガー6を正回転しつつ、下降させて、径Dで、深さHの杭穴22の軸部23を構築する(図1(a))。杭穴22の深さHが、やぐら5の高さに比して深い場合には、通常の方法により掘削ロッド8を継ぎ足しながら、掘削する。 That is, it moves so that the 1st excavation head 10 may be located above 1st pile hole construction position A1 (FIG.4 (b)). While forward rotation auger 6 heavy equipment 4 of the electric, is lowered, with diameter D 0, constructing the shaft portion 23 of Kuiana 22 depth H 0 (Figure 1 (a)). When the depth H 0 of the pile hole 22 is deeper than the height of the tower 5, excavation is performed while adding the excavating rod 8 by a normal method.

杭穴22の軸部23の掘削が完了次第(図1(b))、継ぎ足した掘削ロッド8、8を取り外しにながら第一掘削ヘッド10を地上1に引き上げ、電気式の重機4を、第一掘削ヘッド10を装着したまま(この状態で、掘削ロッド8は最低限の長さにある)、第二次の杭穴掘削位置3に移動させる(図4(c)、図3(c))。   As soon as the excavation of the shaft portion 23 of the pile hole 22 is completed (FIG. 1B), the first excavation head 10 is pulled up to the ground 1 while removing the excavated rods 8 and 8, and the electric heavy machine 4 is With the excavation head 10 mounted (in this state, the excavation rod 8 is at a minimum length), the excavation head 10 is moved to the secondary pile hole excavation position 3 (FIGS. 4C and 3C). ).

(3) 続いて、第一の杭穴構築位置A(杭穴22の軸部23)の上方に、第二掘削ヘッド20が位置するように、油圧式の重機14を移動させる(図4(c))。 (3) Subsequently, the hydraulic heavy machine 14 is moved so that the second excavation head 20 is positioned above the first pile hole construction position A 1 (the shaft portion 23 of the pile hole 22) (FIG. 4). (C)).

油圧式の重機14のオーガー16を下降させて、第二掘削ヘッド20を杭穴22の軸部23の底に位置させ、オーガー16を逆回転して、杭穴22の底部を深さHに亘り押し広げるように掘削して、径Dで、深さHの杭穴22の拡底部24を構築する(図2(c))。 The auger 16 of the hydraulic heavy machine 14 is lowered, the second excavation head 20 is positioned at the bottom of the shaft portion 23 of the pile hole 22, the auger 16 is rotated in the reverse direction, and the bottom portion of the pile hole 22 has a depth H 1. drilling to as pushing over, with diameter D 1, to build拡底portion 24 of Kuiana 22 of depth H 1 (FIG. 2 (c)).

杭穴22の拡底部24の掘削が完了次第(図2(d))、第二掘削ヘッド20を地上1に引き上げる。   As soon as the excavation of the bottom expanded portion 24 of the pile hole 22 is completed (FIG. 2D), the second excavation head 20 is pulled up to the ground 1.

(4) 油圧式の重機14を使用して第一の杭穴構築位置Aで(3)の作業(拡底部24の掘削)をしている間に、電気式の重機4を第二の杭穴構築位置Aに移動して、電気式の重機4で同様に(2)の杭穴軸部23の掘削作業を行う(図4(c))。一般に、(2)の作業工程に要する時間と、(3)の作業工程に要する時間は、異なるので、電気式の重機4と油圧式の重機14とに無駄がなく、効率的に作動させて、基礎杭36の構築を効率良くできる。 (4) while the work using heavy equipment 14 of hydraulic in the first pile hole build position A 1 (3) (drilling拡底section 24), the heavy equipment 4 of the electric second Kuiana constructed to move to the position a 2, performs drilling operations of Kuiana shaft portion 23 similarly (2) in heavy equipment 4 of the electric (FIG 4 (c)). Generally, since the time required for the work process (2) and the time required for the work process (3) are different, the electric heavy machine 4 and the hydraulic heavy machine 14 can be efficiently operated. The foundation pile 36 can be constructed efficiently.

(5) 続いて、(4)の作業が終わったならば、電気式の重機4を、再度、第一の杭穴構築位置Aに移動して、第一掘削ヘッド10を取り外し、電気式の重機4のオーガー6に鉄筋かご34を保持する吊り下げ具(ワイヤー)32を取り付け、鉄筋かご34の上端を吊り、杭穴22内に鉄筋かご34を挿入する(図3(a))。この際、杭穴22が深い場合には、鉄筋かご34を溶接して上下に連結しながら挿入する。また、鉄筋かご34の挿入に前後して、杭穴22内にトレミー管を挿入して、杭穴22内にコンクリートを充填する。 (5) Then, if the work of (4) is finished, the heavy equipment 4 of the electric, again, go to the first pile hole build position A 1, remove the first excavation head 10, electric A hanging tool (wire) 32 for holding the reinforcing bar 34 is attached to the auger 6 of the heavy machine 4, the upper end of the reinforcing bar 34 is hung, and the reinforcing bar 34 is inserted into the pile hole 22 (FIG. 3A). At this time, when the pile hole 22 is deep, the reinforcing bar 34 is welded and inserted while being connected vertically. In addition, before and after the insertion of the reinforcing bar 34, a tremy pipe is inserted into the pile hole 22 to fill the pile hole 22 with concrete.

鉄筋かご34を、杭穴22の開口部25付近の地上1で支えて、重機4から鉄筋かご34(吊り下げ具32)を取り外し、重機4を第三の杭穴構築位置Aに移動する。 The rebar cage 34 is supported by the ground 1 near the opening 25 of the pile hole 22, the rebar cage 34 (hanging tool 32) is removed from the heavy machinery 4, and the heavy machinery 4 is moved to the third pile hole construction position A 3 . .

尚、前記において、鉄筋かご34を重機4で支えたが、他の重機4、重機4を使用しない従来の他の方法により、鉄筋かご34を杭穴22内に挿入することもできる(図示していない)。   In the above description, the rebar cage 34 is supported by the heavy machinery 4. However, the rebar cage 34 can also be inserted into the pile hole 22 by other heavy machinery 4 or other conventional methods that do not use the heavy machinery 4 (illustrated). Not)

(6) コンクリートが固化発現後、基礎杭36を構築する(図3(b)、図4(c))。 (6) After the concrete is solidified, the foundation pile 36 is constructed (FIG. 3 (b), FIG. 4 (c)).

(7) 電気式の重機4を使用して第一の杭穴構築位置Aで(5)の作業(鉄筋かご34の挿入)をしている間に、第二の杭穴構築位置Aで、移動した油圧式の重機14を使って、同様に(3)の作業(拡底部24の掘削)を行う。 (7) while the work using heavy equipment 4 of the electric in the first pile hole build position A 1 (5) (inserted rebar cage 34), a second pile hole build position A 2 Then, using the moved hydraulic heavy machine 14, the operation (3) (excavation of the expanded bottom portion 24) is similarly performed.

(8) 杭穴の掘削など他の実施例は、前記実施例1と同様である。 (8) Other examples such as excavation of a pile hole are the same as those of the first example.

(a)〜(d)は、この発明の実施例1、2に共通する実施例で、杭穴掘削の過程を表す概略した縦断面図である。(A)-(d) is the Example common to Example 1, 2 of this invention, and is the schematic longitudinal cross-sectional view showing the process of a pile hole excavation. (a)(b)は、この発明の実施例1で、図1に続いて既製杭を使って基礎杭を構築する概略した縦断面図である。(A) (b) is the Example 1 of this invention, and is the schematic longitudinal cross-sectional view which builds a foundation pile using a ready-made pile following FIG. (a)(b)は、この発明の実施例2で、図1に続いて現場造成で基礎杭を構築する概略した縦断面図である。(A) (b) is the schematic longitudinal cross-sectional view which constructs a foundation pile by field construction following Example 1 in Example 2 of this invention. (a)〜(f)は、この発明の実施例を説明する概略した平面図である。(A)-(f) is the schematic top view explaining the Example of this invention.

符号の説明Explanation of symbols

1 地面
4 電気式の重機
5 電気式の重機のやぐら
6 電気式の重機のオーガー
8 第一掘削ロッド
10 第一掘削ヘッド
14 油圧式の重機
15 油圧式の重機のやぐら
16 油圧式の重機のオーガー
18 第二掘削ロッド
20 第二掘削ヘッド
22 杭穴
23 杭穴の軸部
24 杭穴の拡底部
25 杭穴の開口部
26 杭の保持具
28 既製杭
30 基礎杭
32 吊り下げ具
34 鉄筋かご
36 基礎杭
DESCRIPTION OF SYMBOLS 1 Ground 4 Electric heavy machine 5 Electric heavy machine tower 6 Electric heavy machine auger 8 First drilling rod 10 First drilling head 14 Hydraulic heavy machine 15 Hydraulic heavy machine tower 16 Hydraulic heavy machine auger 18 Second excavation rod 20 Second excavation head 22 Pile hole 23 Pile hole shaft part 24 Pile hole bottom part 25 Pile hole opening part 26 Pile holder 28 Ready-made pile 30 Foundation pile 32 Suspension tool 34 Reinforcing bar 36 Foundation pile

Claims (5)

以下の手順をとり、杭穴の中間部又は底部に拡径部を形成する杭穴を掘削して基礎杭を構築することを特徴とする基礎杭の構築方法。
(1) 杭穴掘削位置に、杭穴軸部径に対応する第一掘削ヘッドを取り付けた連続掘削可能な重機(以下「第一重機」)と、杭穴拡径部径に対応する第二掘削ヘッドを取り付けた大径掘削可能な重機(以下「第二重機」)とを配置する。
(2) 杭穴掘削位置に、前記第一重機の第一掘削ヘッドを置き、前記第一掘削ヘッドで杭穴軸部を掘削する。この際、掘削しながら深さ方向の掘削データを蓄積して第一掘削データとし、かつリアルタイムに表示する。
(3) 杭穴の軸部掘削完了後に第一ヘッドを掘削中の杭穴から地上に取り出す。
(4) 続いて、前記掘削途中の杭穴に、前記第二重機の第二掘削ヘッドを挿入して、拡大掘削位置まで下降させて、所定位置に拡径掘削をして、拡径部を有する杭穴を構築し、前記第二掘削ヘッドを地上に上げる。この際、掘削しながら深さ方向の掘削データを蓄積して第二掘削データとし、前記第一掘削データと前記第二掘削データとを、深さ方法を合わせて、1つの基礎杭構築に使用した統合掘削データを作成して、表示する。
(5) 続いて、前記杭穴内に、セメント固化物と共に既製杭を設置し、基礎杭を構築する。
A foundation pile construction method characterized by taking the following procedure and constructing a foundation pile by excavating a pile hole that forms an enlarged diameter portion at the middle or bottom of the pile hole.
(1) A heavy machine capable of continuous excavation (hereinafter referred to as “first heavy machine”) with a first excavation head corresponding to the diameter of the pile hole shaft at the pile hole excavation position, and a second corresponding to the diameter of the enlarged diameter part of the pile hole A heavy machine capable of excavating large diameters (hereinafter referred to as “second double machine”) equipped with a drilling head is arranged.
(2) Place the first excavation head of the first heavy machine at the pile hole excavation position and excavate the pile hole shaft with the first excavation head. At this time, the excavation data in the depth direction is accumulated while excavating and used as the first excavation data and displayed in real time.
(3) After the excavation of the shaft part of the pile hole, the first head is taken out from the pile hole being excavated to the ground.
(4) Subsequently, the second excavation head of the second double machine is inserted into the pile hole in the middle of excavation, and is lowered to the enlarged excavation position. A pile hole is constructed and the second excavation head is raised to the ground. At this time, the excavation data in the depth direction is accumulated while excavating and used as the second excavation data, and the first excavation data and the second excavation data are used for one foundation pile construction by combining the depth methods. Create and display integrated drilling data.
(5) Then, before the Kikuiana, the already-made pile installed in cement solidified co, constructing a foundation pile.
以下のようにして、杭穴を掘削して基礎杭を構築することを特徴とする基礎杭の構築方法。
(1) 杭穴掘削位置に、杭穴軸部径に対応する第一掘削ヘッドを取り付けた連続掘削可能な重機(以下「第一重機」)と、杭穴拡径部径に対応する第二掘削ヘッドを取り付けた大径掘削可能な重機(以下「第二重機」)とを配置する。
(2) 杭穴掘削位置に、前記第一重機の第一掘削ヘッドを置き、前記第一掘削ヘッドで、所定の杭穴軸部径より小さな径で小径杭穴軸部を掘削する。この際、掘削しながら深さ方向の掘削データを蓄積して第一掘削データとし、かつリアルタイムに表示する。
(3) 杭穴の小径杭穴軸部を掘削完了後に第一ヘッドを掘削中の杭穴から地上に取り出す。
(4) 続いて、前記掘削途中の杭穴に、前記第二重機の第二掘削ヘッドを挿入して、前記小径杭穴軸部を拡張して所定径の杭穴軸部を掘削して、杭穴を構築し、前記第二掘削ヘッドを地上に上げる。この際、掘削しながら深さ方向の掘削データを蓄積して第二掘削データとし、前記第一掘削データと前記第二掘削データとを、深さ方法を合わせて、1つの基礎杭構築に使用した統合掘削データを作成して、表示する。
(5) 続いて、前記杭穴内に、セメント固化物と共に、既製杭を設置し、基礎杭を構築する。
A foundation pile construction method characterized by excavating a pile hole and constructing the foundation pile as follows.
(1) A heavy machine capable of continuous excavation (hereinafter referred to as “first heavy machine”) with a first excavation head corresponding to the diameter of the pile hole shaft at the pile hole excavation position, and a second corresponding to the diameter of the enlarged diameter part of the pile hole A heavy machine capable of excavating large diameters (hereinafter referred to as “second double machine”) equipped with a drilling head is arranged.
(2) The first excavation head of the first heavy machine is placed at the pile hole excavation position, and the first excavation head excavates the small-diameter pile hole shaft portion with a diameter smaller than a predetermined pile hole shaft diameter. At this time, the excavation data in the depth direction is accumulated while excavating and used as the first excavation data and displayed in real time.
(3) After the completion of excavation of the small-diameter pile hole shaft of the pile hole, the first head is taken out from the pile hole being excavated to the ground.
(4) Subsequently, by inserting the second excavation head of the second double machine into the pile hole in the middle of excavation, expanding the small diameter pile hole shaft portion to excavate the pile hole shaft portion of a predetermined diameter, A pile hole is constructed and the second excavation head is raised to the ground. At this time, the excavation data in the depth direction is accumulated while excavating and used as the second excavation data, and the first excavation data and the second excavation data are used for one foundation pile construction by combining the depth methods. Create and display integrated drilling data.
(5) Then, before the Kikuiana, with cement solidified product was installed already made piles to build the foundation pile.
以下のようにして、杭穴を掘削する請求項2記載の基礎杭の構築方法。
(1) 第二重機に、杭穴軸部径と拡径部径の両方の径に対応した第二掘削ヘッドを装着し、該第二掘削ヘッドの小径側で前記杭穴軸部を所定の径に拡大して掘削する。
(2) 続いて、第二掘削ヘッドを拡大掘削位置まで下降させて、前記第二掘削ヘッドの大径側で、所定位置に拡径掘削をして、拡径部を有する杭穴を構築し、前記第二掘削ヘッドを地上に上げる。
The construction method of the foundation pile of Claim 2 which excavates a pile hole as follows.
(1) A second excavation head corresponding to both the diameter of the pile hole shaft and the expanded diameter is attached to the second double machine, and the pile hole shaft is attached to a predetermined diameter on the small diameter side of the second excavation head. Drill to expand to diameter.
(2) Subsequently, the second excavation head is lowered to the enlarged excavation position, and on the large diameter side of the second excavation head, diameter expansion excavation is performed at a predetermined position to construct a pile hole having an enlarged diameter portion. , Raise the second drilling head to the ground.
一の杭穴掘削位置で、第二の重機を操作している間、第一の重機を他の杭穴掘削位置に移動し、第一掘削ヘッドで杭穴の軸部を掘削する請求項1又は2記載の基礎杭の構築方法。 The first heavy machine is moved to another pile hole excavation position while operating the second heavy machine at one pile hole excavation position, and the shaft portion of the pile hole is excavated by the first excavation head. Or the construction method of the foundation pile of 2 description. 以下のように構成した第一重機及び第二重機を使用する請求項1又は2記載の基礎杭の構築方法。
(1) 前記第一重機を、柱状のやぐらを昇降する電気式の回転駆動機を設置し、該回転駆動機の下端に掘削ロッドの上端を着脱自在とした。
(2) 前記第二重機を、クレーン式のやぐらに油圧式の回転駆動機を設置し、該回転駆動機に掘削ロッドを装着した。
The foundation pile construction method according to claim 1 or 2, wherein the first heavy machine and the second double machine configured as described below are used.
(1) The first heavy machine is provided with an electric rotary drive that moves up and down a columnar tower, and the upper end of the excavation rod is detachably attached to the lower end of the rotary drive.
(2) A hydraulic rotary drive machine was installed in the crane type tower with the second double machine, and a drilling rod was attached to the rotary drive machine.
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CN104895058B (en) * 2015-06-16 2017-06-27 建基建设集团有限公司 The all-hydraulic two-tube compound club-footed pile machine of static pressure and its construction method
JP6329590B2 (en) * 2016-06-16 2018-05-23 株式会社オーク Pile construction management method
JP6234626B1 (en) * 2017-05-15 2017-11-22 東北電力株式会社 Excavation apparatus and excavation method used for burying underground heat exchange pipe

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JPS63524A (en) * 1986-06-18 1988-01-05 Katsumi Kitanaka Sensor for opening degree of bucket for excavator of bottom-expanded pit
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