JP3031876B2 - Izutsu laying method and its device - Google Patents
Izutsu laying method and its deviceInfo
- Publication number
- JP3031876B2 JP3031876B2 JP9126130A JP12613097A JP3031876B2 JP 3031876 B2 JP3031876 B2 JP 3031876B2 JP 9126130 A JP9126130 A JP 9126130A JP 12613097 A JP12613097 A JP 12613097A JP 3031876 B2 JP3031876 B2 JP 3031876B2
- Authority
- JP
- Japan
- Prior art keywords
- well
- enlarged
- diameter
- drill
- casing
- 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
- Placing Or Removing Of Piles Or Sheet Piles, Or Accessories Thereof (AREA)
- Earth Drilling (AREA)
Description
【０００１】[0001]
【発明の属する技術分野】この発明は井筒沈設工法及び
その装置に関するもので、とりわけ、ＰＣウェル又はケ
ーソン等のコンクリート製の井筒の刃先下を掘削しなが
ら、積み重ねた井筒を順次圧下させて埋設する工法及び
その装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for digging wells and an apparatus therefor, and in particular, digging and burying wells in piles while excavating below the edge of concrete wells such as PC wells or caisson. The present invention relates to a construction method and an apparatus therefor.
【０００２】[0002]
【従来の技術】コンクリート製の井筒沈設工法の一つと
してのＰＣウェル工法は、プレキャストコンクリートブ
ロックによりプレハブ化したウェルを懸吊しながら最底
部の刃先下を掘削し、刃先下の掘削完了毎にウェルを順
次沈下させていく工法である。また、他の一つとしての
オープンケーソン工法は、現場で型枠内に生コンクリー
トを打設してケーソンを形成しながらその自重で地中に
沈下埋設するものである。これらの工法にあっては、ウ
ェル又はケーソンの刃先下の掘削が問題であることは斯
界に周知の事項である。2. Description of the Related Art The PC well method, which is one of the methods of submerging concrete wells, is to excavate below the bottom edge of a blade while suspending a prefabricated well by a precast concrete block. This is a method in which the wells are sequentially settled. The open caisson method, which is another one, is to lay the concrete in a formwork at the site to form a caisson and bury it under the ground by its own weight. In these methods, it is well known in the art that excavation below the edge of a well or caisson is a problem.
【０００３】従来、刃先下の掘削には、無人化工事を図
るために、刃先下の土砂を掘削する拡底掘削機を用いる
が、この拡底掘削機としては建設省土木研究所が開発し
た遊星駆動型拡底掘削機が知られている（特許第１，０
０５，４４１号等）。Conventionally, excavation under the cutting edge is performed by using an excavating bottom excavator for excavating earth and sand under the cutting edge in order to achieve unmanned construction. 2. Description of the Related Art Drilling excavators are known (Japanese Patent Nos.
No. 05,441).
【０００４】また、ケーソンの内周面にガイドレールを
固定し、このガイドレールに沿って周方向へ移動可能に
バックホウを設け、刃先下の全周をバックホウで掘削
し、その掘削土を油圧グラブで揚土するというガイドレ
ール式バックホウタイプがこれまた建設省土木研究所の
提唱で開発されている。[0004] A guide rail is fixed to the inner peripheral surface of the caisson, a backhoe is provided along the guide rail so as to be movable in the circumferential direction, the entire periphery below the cutting edge is excavated by the backhoe, and the excavated soil is hydraulically grabbed. A guide rail type backhoe type that excavates at the site has also been developed at the proposal of the Public Works Research Institute of the Ministry of Construction.
【０００５】[0005]
【発明が解決しようとする課題】しかしながら、前記遊
星駆動型拡底掘削機（穴掘削機）は構造が複雑で重量的
にも重く、地上から立坑内に吊支する櫓等の設備を大型
にしなければならないほか、掘削効率が悪い等の不都合
を有し、また、ガイドレール式バックホウタイプは、ケ
ーソンの孔径が充分に大きくなければ使用できない欠点
がある。さらには、従来技術ではウェル又はケーソンの
刃先下地盤の掘削が必ずしも確実にできないために、硬
質土砂に遭遇すると沈設困難となるケースがしばしば生
じ、ウェル又はオープンケーソン工法の欠点の一つにな
っていた。However, the planetary driven bottom excavator (hole excavator) has a complicated structure and is heavy in weight, so that equipment such as a turret suspended from the ground in a shaft must be large. In addition to this, there are inconveniences such as poor excavation efficiency and the like, and the guide rail type backhoe type cannot be used unless the caisson has a sufficiently large hole diameter. Furthermore, in the prior art, the excavation of the well or caisson blade foundation is not always possible, so that it is often difficult to settle when encountering hard earth and sand, which is one of the drawbacks of the well or open caisson method. Was.
【０００６】そこで、この発明はこのような事情に鑑み
て、刃先下の効率のよい確実な掘削ができるウェル又は
ケーソン等の井筒沈設工法及びその装置を提供する。In view of such circumstances, the present invention provides a well or caisson laying method for a well or caisson and the like, and an apparatus therefor, which enables efficient and reliable excavation below the cutting edge.
【０００７】[0007]
【課題を解決するための手段】この発明にかかる井筒沈
設工法は、請求項１によれば、ケーソン又はウェル等の
井筒を沈設可能に配置してその井筒内にドリルケーシン
グを挿入し、ドリルケーシングの下端に植設した掘削刃
及びドリルケーシングの外周部に所定角度内で拡開可能
に軸着した拡径翼の側部及び底部に植設した掘削刃に
て、井筒刃先下の掘削を行い井筒を制御しながら沈下す
る一方、ドリルケーシングの下端部付近に開設した開口
部から掘削土砂をドリルケーシング内に導入してハンマ
ーグラブで揚土することを特徴とする。したがって、完
全無人化で井筒沈設施工ができる。According to the first aspect of the present invention, there is provided a method of laying a well, such as a caisson or a well, in which a well is sunk and a drill casing is inserted into the well. Excavation under the cutting edge of a well is performed with a drilling blade implanted at the lower end of the drill and a drilling blade implanted on the side and bottom of a diameter-enlarging wing that is mounted on the outer periphery of the drill casing so as to be able to expand within a predetermined angle. While sinking while controlling the well, the excavated earth and sand is introduced into the drill casing through an opening formed near the lower end of the drill casing, and excavated by a hammer grab. Therefore, it is possible to complete the construction of the well with completely unmanned operation.
【０００８】請求項２によれば、前記拡径翼による掘削
は、井筒の外径と同等若しくはそれ以上の範囲で行うこ
とを特徴とし、また、請求項３によれば、前記拡径翼に
よる掘削は、井筒の内径と同等若しくはそれ以下の範囲
内で行うことを特徴とし、さらに、請求項４によれば、
前記拡径翼による掘削は、井筒の外径よりも小さく、か
つ、内径よりも大きい範囲内で行うことを特徴とする。
したがって、掘削地盤の硬・軟度や井筒の周面摩擦と井
筒自重との関係、及び、圧入装置による井筒圧し下げ能
力などの諸要因を勘案して制御した井筒沈設施工ができ
る。According to a second aspect of the present invention, the excavation by the widening wing is performed within a range equal to or larger than the outer diameter of the well tube. The excavation is performed within a range equal to or less than the inner diameter of the well, and according to claim 4,
The excavation by the expanded wing is performed within a range smaller than the outer diameter of the well tube and larger than the inner diameter.
Therefore, it is possible to perform the well laying operation controlled in consideration of various factors such as the relationship between the hardness / softness of the excavated ground, the peripheral surface friction of the well, and the well weight, and the ability to lower the well by the press-fitting device.
【０００９】また、この発明にかかる井筒沈設装置は、
請求項５によれば、下端部周縁に掘削刃を植設したドリ
ルケーシングの下端部付近に開口部を設け、その開口部
付近に拡径翼を所定角度内で開閉可能に軸着するととも
に、該拡径翼の側部及び底部にそれぞれ掘削刃を植設
し、該ドリルケーシング上端部付近においてケーシング
回転駆動装置をロータリーテーブルに固定したことを特
徴とする。また、請求項６によれば、下端部周縁に掘削
刃を植設したドリルケーシングの下端部付近に開口部を
設け、その開口部付近に拡径翼を所定角度内で開閉可能
に軸着するとともに、該拡径翼の側部及び底部にそれぞ
れ掘削刃を植設し、該ドリルケーシング上端部付近にお
いてケーシング回転駆動装置をロータリーテーブルに固
定し、かつ、井筒を圧下させる圧入装置を有することを
特徴とする。したがって、簡単な構成で井筒の刃先下を
掘削することが完全無人化で施工できる。[0009] The well setting device according to the present invention includes:
According to claim 5, an opening is provided in the vicinity of the lower end of the drill casing in which a drilling blade is implanted at the periphery of the lower end, and the enlarged-diameter wing is axially mounted near the opening so as to be openable and closable within a predetermined angle. A digging blade is implanted on each of the side and bottom of the enlarged-diameter wing, and a casing rotation driving device is fixed to a rotary table near an upper end of the drill casing. According to the sixth aspect, an opening is provided in the vicinity of the lower end of a drill casing having a drilling blade implanted in the periphery of the lower end, and an enlarged wing is pivotally mounted near the opening so as to be openable and closable within a predetermined angle. In addition, a drilling blade is implanted on each of the side and the bottom of the enlarged-diameter wing, and a casing rotation drive device is fixed to a rotary table near an upper end portion of the drill casing, and a press-fitting device for lowering a well is provided. Features. Therefore, it is possible to completely excavate below the cutting edge of the well cylinder with a simple configuration.
【００１０】請求項７によれば、下端部周縁に掘削刃を
植設したドリルケーシングの下端部付近に開口部を設
け、その開口部と合致する開口部を有して周側部に拡径
翼を軸着した拡径ドリルパイプを、前記ドリルケーシン
グに嵌合するとともに、該拡径翼の側部及び底部にそれ
ぞれ掘削刃を植設し、該拡径翼の内側に一端部を軸着し
たアームの他端部を前記ドリルケーシングに軸着し、そ
のドリルケーシング又は継ぎ足したドリルケーシング上
端部付近においてケーシング回転駆動装置をロータリー
テーブルに固定したことを特徴とする。また、請求項８
によれば、下端部周縁に掘削刃を植設したドリルケーシ
ングの下端部付近に開口部を設け、その開口部と合致す
る開口部を有して周側部に拡径翼を軸着した拡径ドリル
パイプを、前記ドリルケーシングに嵌合するとともに、
該拡径翼の側部及び底部にそれぞれ掘削刃を植設し、該
拡径翼の内側に一端部を軸着したアームの他端部を前記
ドリルケーシングに軸着し、そのドリルケーシング又は
継ぎ足したドリルケーシング上端部付近においてケーシ
ング回転駆動装置をロータリーテーブルに固定し、か
つ、井筒を圧下させる圧入装置を有することを特徴とす
る。したがって、拡径ドリルパイプがドリルケーシング
の回転によりアームを押し引きして拡径翼を開閉するこ
とができる。According to the present invention, an opening is provided in the vicinity of the lower end of a drill casing having a drilling blade implanted at the periphery of the lower end, and an opening corresponding to the opening is provided. A diameter-enlarged drill pipe with wings mounted thereon is fitted into the drill casing, and a drilling blade is implanted on each of a side portion and a bottom portion of the diameter-enlarged wings, and one end is axially mounted inside the diameter-enlarged wings. The other end of the arm is pivotally attached to the drill casing, and a casing rotation driving device is fixed to the rotary table in the vicinity of the upper end of the drill casing or the added drill casing. Claim 8
According to the above, an opening is provided in the vicinity of the lower end of a drill casing in which a drilling blade is implanted around the lower end, an opening matching the opening is provided, and an enlarged wing is axially mounted on the peripheral side. While fitting a diameter drill pipe to the drill casing,
Drilling blades are implanted on the side and the bottom of the enlarged wing, respectively, and the other end of an arm having one end axially mounted on the inside of the enlarged wing is axially attached to the drill casing. In addition, a casing rotary drive device is fixed to a rotary table near the upper end portion of the drill casing, and a press-fitting device for lowering a well tube is provided. Therefore, the enlarged diameter drill pipe can push and pull the arm by the rotation of the drill casing to open and close the enlarged diameter wing.
【００１１】請求項９によれば、拡径ドリルパイプに周
方向へ所定幅の開口部を設け、該開口部から突出するス
トッパーをドリルケーシングの外周面に突設する一方、
該ストッパーに当接する他の一つのストッパーを拡径ド
リルパイプに固定して拡径翼の開き角度を調節できるよ
うにしたことを特徴とする。したがって、井筒の外径、
内径又は外径と内径の間等の径の変化に応じた立坑掘削
をすることができる。According to the ninth aspect, an opening having a predetermined width is provided in the circumferential direction in the enlarged diameter drill pipe, and a stopper protruding from the opening is provided on the outer peripheral surface of the drill casing.
Another stopper that abuts the stopper is fixed to the enlarged diameter drill pipe so that the opening angle of the enlarged diameter wing can be adjusted. Therefore, the outer diameter of the well,
Shaft excavation can be performed according to a change in diameter such as between the inner diameter or the outer diameter and the inner diameter.
【００１２】[0012]
【発明の実施の形態】以下この発明の実施の形態を図に
基づき説明する。図１に示すように、ＰＣウエル又はケ
ーソン等の井筒１を沈設すべき地上Ｅに、埋め込んだア
ンカー杭２で反力を取り得る櫓型のベースフレーム３を
構築し、このベースフレーム３の頂部には中央に円孔４
を有するロータリーテーブル５を載置し、その円孔４の
上に一対のケーシング回転駆動装置６，６を搭載し、か
つ、そのケーシング回転駆動装置６で回転するケリー係
合枠６ａにケリーパイプ７を係合してある。DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. As shown in FIG. 1, a tower type base frame 3 capable of taking a reaction force with an embedded anchor pile 2 is constructed on a ground E where a well 1 such as a PC well or caisson is to be laid, and the top of the base frame 3 Has a circular hole 4 in the center
Is mounted, and a pair of casing rotation driving devices 6 and 6 are mounted on the circular hole 4, and a kelly pipe 7 is mounted on a kelly engaging frame 6 a rotated by the casing rotation driving device 6. Are engaged.
【００１３】ケリーパイプ７にはそれに係合して一体回
転するドリルケーシング８が貫通して係合し、ドリルケ
ーシング８は所定長さのもの（８ａ〜８ｄ）を継ぎ足し
ながら所要長さにする。ドリルケーシング８ａ〜８ｄの
連結は、図３に示すように、例えば、ドリルケーシング
８ａのフランジ部８０のボルト挿通孔８１にボルトを挿
通してナットで締結する。フランジ部８０にはトルクピ
ンを挿通することもある。ドリルケーシング８は円孔４
を貫通し、最下端のドリルケーシング８ａには、拡径ド
リルパイプ１０がドリルケーシング８ａに軸中心で回転
可能に嵌合している。そして、拡径ドリルパイプ１０の
抜け止めとして、ドリルケーシング８ａに拡径ドリルパ
イプ１０を挿通した後、該拡径ドリルパイプ８ａの上下
端部にそれぞれ接触するリング１０ａ，１０ｂをドリル
ケーシング８ａに固定して拡径ドリルパイプ１０が軸中
心で回転可能に固定される。A drill casing 8, which rotates integrally with the kelly pipe 7, penetrates and engages with the kelly pipe 7. The drill casing 8 has a predetermined length (8a to 8d) and has a required length. As shown in FIG. 3, the drill casings 8a to 8d are connected by, for example, inserting bolts into bolt insertion holes 81 of the flange portion 80 of the drill casing 8a and fastening them with nuts. A torque pin may be inserted into the flange portion 80 in some cases. Drill casing 8 is circular hole 4
The diameter-enlarged drill pipe 10 is rotatably fitted to the drill casing 8a at the lowermost end of the drill casing 8a. Then, to prevent the diameter-enlarged drill pipe 10 from coming off, the rings 10a and 10b that contact the upper and lower ends of the diameter-enlarged drill pipe 8a are fixed to the drill casing 8a after the diameter-enlarged drill pipe 10 is inserted through the drill casing 8a. Then, the enlarged diameter drill pipe 10 is rotatably fixed about the axis.
【００１４】また、拡径ドリルパイプ１０の下部には掘
削パイプ１０ｃがドリルケーシング８ａに嵌合し、掘削
パイプ１０ｃの下端部円周縁に掘削刃９が植設されてい
る。掘削パイプ１０ｃには軸方向及び周方向へ連通する
略Ｌ字形の切欠部４０（図４参照）を上端側に形成する
一方、ドリルケーシング８ａの内周面にその切欠部４０
に嵌合する略正方形のボス４１を突設して、掘削パイプ
１０ｃをドリルケーシング８ａに嵌装し、ボス４１を切
欠部４０の開口部に合わせて軸方向で押し込むととも
に、周方向へ回転させてボス４１を閉じ込め、残る切欠
部４０にプレート４２を掘削パイプ１０ａの外側から嵌
合して軸方向及び周方向へ移動不能に固定してある。な
お、この掘削パイプ１０ｃは拡径ドリルパイプ１０の二
重の抜け止めとして構成したものであって、ドリルケー
シング８ａの下端部周縁に掘削刃９を直接植設し、掘削
パイプ１０ｃを省略することとしても同等である。A drill pipe 10c is fitted to the drill casing 8a below the diameter-enlarged drill pipe 10, and a drill blade 9 is implanted around the lower end of the drill pipe 10c. A substantially L-shaped notch 40 (see FIG. 4) communicating with the drilling pipe 10c in the axial direction and the circumferential direction is formed on the upper end side, while the notch 40 is formed on the inner peripheral surface of the drill casing 8a.
A boss 41 having a substantially square shape is provided so as to protrude, the drill pipe 10c is fitted into the drill casing 8a, and the boss 41 is pushed in the axial direction in accordance with the opening of the cutout portion 40 and rotated in the circumferential direction. The boss 41 is confined, and the plate 42 is fitted into the remaining notch 40 from the outside of the excavation pipe 10a so as to be immovable in the axial and circumferential directions. In addition, this drilling pipe 10c is configured as a double retainer for the diameter-enlarged drill pipe 10, and the drilling blade 9 is directly implanted on the periphery of the lower end of the drill casing 8a, and the drilling pipe 10c is omitted. Is equivalent.
【００１５】拡径ドリルパイプ１０は、図１，図２及び
図４に示すように、直径方向で相対向する２つのスクレ
ーパ１１，１１を上反角をもって突設し、それらのスク
レーパ１１には掘削刃１２を下方に向けて設け、図５及
び図６に示すように、このスクレーパ１１の近傍にブラ
ケット３９を張り出して取り付け、図４に示すように、
このブラケット３９にはヒンジ１４をドリルケーシング
８ａと平行に設け、このヒンジ１４にて回動可能な拡径
翼１３を設けてある。As shown in FIGS. 1, 2 and 4, the diameter-enlarged drill pipe 10 has two diametrically opposed scrapers 11, 11 projecting at an oblique angle. The excavating blade 12 is provided downward, and as shown in FIGS. 5 and 6, a bracket 39 is extended and attached near the scraper 11, and as shown in FIG.
A hinge 14 is provided on the bracket 39 in parallel with the drill casing 8a, and the enlarged wings 13 rotatable by the hinge 14 are provided.
【００１６】ブラケット３９はヒンジの上下端部及びそ
の中間部に配置して拡径ドリルパイプ１０に結合され
る。そして、拡径翼１３を開閉するためのアーム１５が
その一端部をドリルケーシング８ａの外壁に突設したブ
ラケット１５ａと、拡径翼１３の内壁に突設したブラケ
ット１５ｂ間に軸着して連結される。アーム１５は拡径
翼１３の開きを所定角度内に規制するものであり、その
長さによって開き角度が決定されるから、その適宜の長
さが選択される。The bracket 39 is disposed at the upper and lower ends of the hinge and at an intermediate portion thereof, and is connected to the enlarged diameter drill pipe 10. An arm 15 for opening and closing the enlarged wing 13 is connected to a bracket 15a having one end protruding from the outer wall of the drill casing 8a and a bracket 15b protruding from the inner wall of the enlarged wing 13 by being axially connected thereto. Is done. The arm 15 regulates the opening of the enlarged-diameter wing 13 within a predetermined angle, and since the opening angle is determined by its length, an appropriate length is selected.
【００１７】拡径ドリルパイプ１０には拡径翼１３の上
端よりも下位に位置する開口部１６が設けられている。
この開口部１６に面して開口部１６ａがドリルケーシン
グ８ａに開設されている。そして、図２と図７及び図８
に示すように、ドリルケーシング８ａの外壁にストッパ
ー３６を突設する一方、このストッパー３６に当接する
他の一つのストッパーとして拡径ドリルパイプ１０の外
壁にナット３７，３７を固定し、ナット３７，３７には
ボルト３８，３８を螺合してある。The enlarged diameter drill pipe 10 is provided with an opening 16 located below the upper end of the enlarged diameter wing 13.
An opening 16a is formed in the drill casing 8a so as to face the opening 16. 2 and FIGS. 7 and 8
As shown in FIG. 7, a stopper 36 is projected from the outer wall of the drill casing 8a, and nuts 37, 37 are fixed to the outer wall of the diameter-enlarged drill pipe 10 as another stopper that comes into contact with the stopper 36. Bolts 38, 38 are screwed into 37.
【００１８】ストッパー３６は拡径ドリルパイプ１０の
上部に開設した周方向へ所定幅の開口部３５から外方へ
突出してドリルケーシング８ａが右回転するとボルト３
８の端部に当接することができる。ボルト３８はナット
３７に対するストッパー３６への突出長さを調節でき、
その長短によって拡径翼１３，１３の開き角度を設定で
きるようにしたもので、これにより井筒１の外径に応じ
た拡径孔の掘削ができるようにしてある。なお、ストッ
パー３６はボルト３８の端部の当たりを全面的に受ける
ことができるように、ストッパー３６の端部に首振り可
能なシュー３６ａを回動可能に軸着してある。The stopper 36 protrudes outward from an opening 35 having a predetermined width in the circumferential direction formed at the upper part of the enlarged diameter drill pipe 10, and the bolt 3 is rotated when the drill casing 8a rotates clockwise.
8 can be abutted. The bolt 38 can adjust the projection length of the nut 37 to the stopper 36,
The opening angle of the expanding wings 13, 13 can be set according to the length thereof, so that an expanding hole corresponding to the outer diameter of the well 1 can be excavated. The stopper 36 has a rotatable shoe 36a pivotally mounted on the end of the stopper 36 so that the stopper 36 can completely receive the end of the bolt 38.
【００１９】拡径翼１３の底部及び側部にはそれぞれ掘
削刃１７，１８が掘削刃１２と連続するように植設され
ている。したがって、ケリーパイプ７が右回転してドリ
ルケーシング８が右回転すると、掘削刃９と拡径ドリル
パイプ１０の掘削刃１２で図７に示す直径Ｄ1の孔を掘
削する一方、拡径翼１３が開くと、掘削刃１８，１８で
図８に示す直径Ｄの拡径孔１９が掘削できることとな
る。拡径孔１９は少なくとも井筒１の外径に達する直径
を有するもので、これによって井筒１の刃先下１ａの下
部の土砂を取り除いて井筒１を圧下させ易くするもので
ある。Drilling blades 17 and 18 are implanted at the bottom and side portions of the enlarged diameter wing 13 so as to be continuous with the drilling blade 12. Therefore, when the kelly pipe 7 drill casing 8 by right rotation is clockwise, while drilling a hole of diameter D 1 shown in FIG. 7 by digging edge 12 of the digging edge 9 and the enlarged diameter drill pipe 10, enlarged wing 13 When is opened, it is possible to excavate the enlarged hole 19 having the diameter D shown in FIG. The enlarged diameter hole 19 has a diameter which reaches at least the outer diameter of the well 1, and thereby removes earth and sand below the cutting edge 1 a of the well 1, thereby facilitating the reduction of the well 1.
【００２０】拡径翼１３，１３の開閉を確認するため
に、最下端のドリルケーシング８ａにバッテリー２０と
それを電源とする電波発信器２１とアンテナ２３を取り
付け固定する一方、拡径翼１３には近接スイッチ２３が
継線ボックス２４を介して取り付け固定される。そし
て、ロータリーテーブル５には受信した電波によって拡
径翼１３が開いた状態と閉じた状態を確認するためのラ
ンプを有する受信器表示器２５が設けられている。受信
器表示器２５からアース線２６が地上Ｅに延伸してい
る。In order to confirm opening and closing of the enlarged wings 13, 13, a battery 20, a radio wave transmitter 21 using the battery as a power source, and an antenna 23 are fixed to a drill casing 8 a at the lowermost end. , A proximity switch 23 is attached and fixed via a connection box 24. The rotary table 5 is provided with a receiver indicator 25 having a lamp for confirming whether the expanded wing 13 is open or closed by a received radio wave. A ground wire 26 extends from the receiver indicator 25 to the ground E.
【００２１】なお、井筒１の圧入をする場合のために、
井筒１の上端部に当接する加圧リング桁３０を載置し、
この加圧リング桁３０の周縁部を貫通するピストンロッ
ド３１の上端部をベースフレーム３の上部に支持させた
上フレーム３ａに、下端部をフレーム３の下部に支持さ
せた下フレーム３ｂにそれぞれ連結し、このピストンロ
ッド３１には油圧シリンダ３２が係合し、この油圧シリ
ンダ３２の上端部は加圧リング桁３０に連結されてい
る。したがって、油圧シリンダ３２が下降すると加圧リ
ング桁３０は下降して井筒１を圧下させることができ
る。ロータリーテーブル５は加圧リング桁３０の上面に
搭載することとしてもよい。In order to press-fit the well 1,
Place the pressure ring girder 30 in contact with the upper end of the well 1
The upper end of the piston rod 31 penetrating the periphery of the pressure ring girder 30 is connected to an upper frame 3a supported on the upper part of the base frame 3, and the lower end is connected to a lower frame 3b supported on the lower part of the frame 3. A hydraulic cylinder 32 is engaged with the piston rod 31, and the upper end of the hydraulic cylinder 32 is connected to the pressure ring girder 30. Therefore, when the hydraulic cylinder 32 descends, the pressure ring girder 30 descends and the well cylinder 1 can be lowered. The rotary table 5 may be mounted on the upper surface of the pressure ring girder 30.
【００２２】なお、上記において、ドリルケーシング８
ａに拡径ドリルパイプ１０を嵌合してこれに拡径翼１
３，１３を軸着したが、拡径翼１３，１３をドリルケー
シング８ａに直接軸着して拡径ドリルパイプ１０を省略
し、その拡径翼１３，１３はカム又は油圧シリンダ等に
より開閉できるように構成しても同等の効果が得られ
る。In the above description, the drill casing 8
a with the enlarged diameter drill pipe 10 and the enlarged diameter wing 1
Although the diameter-enlarged wings 13 and 13 are mounted on the shaft, the diameter-enlarged wings 13 and 13 are directly mounted on the drill casing 8a to omit the diameter-enlarged drill pipe 10. The diameter-enlarged wings 13 and 13 can be opened and closed by a cam or a hydraulic cylinder or the like. Even with such a configuration, the same effect can be obtained.
【００２３】次に上記装置を用いた井筒沈設工法を説明
する。この装置例では、ロータリーテーブル５は加圧リ
ング桁３０の上に搭載されている。図９に示すように、
適宜数のアンカー杭２を打ち込んだ地上Ｅに、ベースフ
レーム３を立設してアンカー杭２に支持を取り、刃先下
２９を有する井筒１に刃先下を有しない井筒１ａを重
ね、一体に連結して配置し、井筒１ａの上端面に加圧リ
ング桁３０を当接させる。ついで、図１０に示すよう
に、井筒１内の土砂をハンマーグラブ４４で余掘りする
ことにより穴５０を形成する。Next, a well pipe laying method using the above apparatus will be described. In this device example, the rotary table 5 is mounted on the pressure ring girder 30. As shown in FIG.
A base frame 3 is erected on the ground E on which an appropriate number of anchor piles 2 are driven, and is supported by the anchor piles 2. A well 1a having no lower edge is overlaid on a well 1 having a lower edge 29, and integrally connected. The pressure ring girder 30 is brought into contact with the upper end surface of the well 1a. Then, as shown in FIG. 10, a hole 50 is formed by excavating the earth and sand in the well 1 with a hammer glove 44.
【００２４】さらに、図１１に示すように、拡径ドリル
パイプ１０を装着したドリルケーシング８ａにドリルケ
ーシング８ｂを継ぎ足したものを、カンザシ５１でロー
タリーテーブル５に吊支してベースフレーム３に支持
し、拡径ドリルパイプ１０を井筒１ａ，１から穴５０内
に挿入する。カンザシ５１はドリルケーシング８ｂのフ
ランジ部８０の下面に当接して抜け止めとなる２本の金
物である。Further, as shown in FIG. 11, a drill casing 8a on which a drill pipe 10 with an enlarged diameter is mounted and a drill casing 8b added thereto is suspended from a rotary table 5 by a kansashi 51 and supported on a base frame 3. Then, the diameter-enlarged drill pipe 10 is inserted into the hole 50 from the wells 1a, 1. The kansashi 51 is two pieces of metal that come into contact with the lower surface of the flange portion 80 of the drill casing 8b to prevent the drill casing 8b from coming off.
【００２５】そして、図１２に示すように、ドリルケー
シング８ｂにはさらにドリルケーシング８ｃを継ぎ足し
てドリルケーシング８ａを穴５０に着底させる一方、継
ぎ足したドリルケーシング８ｃにケリーパイプ７を嵌合
してケーシング回転駆動装置６と係合させ、ドリルケー
シング８ａ，８ｂ，８ｃ及び拡径ドリルパイプ１０を回
転可能に待機させる。Then, as shown in FIG. 12, a drill casing 8c is further added to the drill casing 8b so that the drill casing 8a is settled in the hole 50, and the kelly pipe 7 is fitted into the added drill casing 8c. The drill casing 8a, 8b, 8c and the large-diameter drill pipe 10 are engaged with the casing rotation drive device 6 so as to be rotatable.
【００２６】そこで、ケーシング回転駆動装置６を駆動
してケリーパイプ７を右回転させると、その当初にドリ
ルケーシング８は回転して掘削刃９で穴底を掘削して
も、ストッパー３６がボルト３８に当接するまでの間
は、拡径ドリルパイプ１０は掘削刃１２，１２の抵抗を
受けて回転せず、ストッパー３６がボルト３８に当接し
て初めて拡径ドリルパイプ１０が回転する。そして、ド
リルケーシング８ａが回転する一方で拡径ドリルパイプ
１０が掘削刃１２，１２の反力で固定している間に、ア
ーム１５，１５が拡径翼１３，１３を半径方向外方へ押
し出す結果、拡径翼１３は、図６，８に示すように、ス
トッパー３６がボルト３８に当接するまでのドリルケー
シング８ａの回転角度内で外方へ開き、掘削刃１７，１
８が、図１３に示すように穴底及び穴壁を掘削する。こ
のように、拡径翼１３，１３が開く力は、掘削刃１２の
抵抗反力とドリルケーシング８の回転力で行われるか
ら、拡径翼１３，１３の開閉は確実かつ強力である。Therefore, when the casing rotation drive unit 6 is driven to rotate the kelly pipe 7 clockwise, the drill casing 8 is initially rotated and the stopper 36 is bolted 38 Until the stop, the enlarged diameter drill pipe 10 does not rotate due to the resistance of the drilling blades 12, 12, and the enlarged diameter drill pipe 10 rotates only when the stopper 36 contacts the bolt 38. While the drill casing 8a is rotating, the arms 15, 15 push the enlarged wings 13, 13 radially outward while the enlarged diameter drill pipe 10 is fixed by the reaction force of the drilling blades 12, 12. As a result, as shown in FIGS. 6 and 8, the expanding wing 13 opens outward within the rotation angle of the drill casing 8a until the stopper 36 comes into contact with the bolt 38, and the digging blades 17, 1
8 excavates the hole bottom and hole wall as shown in FIG. As described above, the opening of the enlarged wings 13, 13 is performed by the resistance reaction force of the excavating blade 12 and the rotational force of the drill casing 8, so that the opening and closing of the enlarged wings 13, 13 are reliable and strong.
【００２７】このとき、近接スイッチ２３が拡径翼１３
の開きを確認し、発信器２１よりその信号をアンテナ２
２から電波として発車し、ぞの電波を受信器表示器２５
で受信して拡径翼１３が拡大した表示をなす。掘削刃１
７，１８は井筒１の刃先下２９の土砂を掘削して、図１
４に示すように、立坑５２を形成するとともに、掘削刃
９と掘削刃１２，１２の上反角で中心位置を保持しなが
ら軸孔５３を掘削する。したがって、拡径翼１３，１３
の回転中心が振れることなく精度の高い立坑５２が形成
されることになる。At this time, the proximity switch 23 is set to
Is confirmed, and the signal is transmitted from the transmitter 21 to the antenna 2
2 departs as a radio wave, and the radio wave
And the enlarged wing 13 is enlarged. Drilling blade 1
7 and 18 dig the earth and sand below the cutting edge 29 of the well 1
As shown in FIG. 4, the shaft hole 53 is excavated while forming the shaft 52 and maintaining the center position at the dihedral angle of the excavation blade 9 and the excavation blades 12 and 12. Therefore, the expanding wings 13, 13
The shaft 52 with high accuracy is formed without the center of rotation of the shaft 52 swinging.
【００２８】そして、掘削刃９，１２，１７，１８が掻
き取った土砂は、拡径翼１３，１３及びスクレーパ１
１，１１を介して開口部１６，１６ａからドリルケーシ
ング８ａ内に掻き込まれる。ドリルケーシング８ａ内に
移動した土砂は、ケリーパイプ７からドリルケーシング
８ｃ，８ｂ，８ａ内に挿入されるハンマーグラブ４４で
地上に揚げる。かくして、立坑５２を掘削しながら井筒
１を沈下させるために、油圧シリンダ３２に圧油を供給
してピストンロッド３１に沿い加圧リング桁３０を下方
へ移動させると、井筒１は立坑５２内に圧入される。The dirt scraped off by the excavating blades 9, 12, 17, 18 is fed to the expanding wings 13, 13 and the scraper 1
It is scraped into the drill casing 8a from the openings 16, 16a via the holes 1,11. The earth and sand moved into the drill casing 8a is lifted to the ground by a hammer glove 44 inserted into the drill casings 8c, 8b, 8a from the kelly pipe 7. Thus, in order to sink the well 1 while excavating the shaft 52, when the pressurized oil is supplied to the hydraulic cylinder 32 and the pressure ring girder 30 is moved downward along the piston rod 31, the well 1 is placed in the shaft 52. Press-fit.
【００２９】そこで、井筒１が立坑５２内に圧入された
段階において、図１５に示すように、ケーシング回転駆
動装置６にてケリーパイプ７を左回転させると、その当
初に拡径ドリルパイプ１０は掘削刃１２，１７，１８の
抵抗を反力として静止状態となり、ついでボルト３８が
ストッパー３６から離れた段階でアーム１５，１５が拡
径翼１３，１３を拡径ドリル１０側に引き寄せて縮径す
ると、近接スイッチ２３がそれを検知して発信器２１が
動作し、アンテナ２２から発射された電波が受信器表示
器２５で受信され、かつ、拡径翼１３，１３が求心的に
縮小した表示をする。When the well tube 1 is pressed into the shaft 52, as shown in FIG. 15, the casing rotary drive unit 6 rotates the kelly pipe 7 counterclockwise. The resistance of the digging blades 12, 17, 18 becomes a reaction force and becomes stationary, and then, when the bolt 38 is separated from the stopper 36, the arms 15, 15 draw the expanding wings 13, 13 toward the expanding drill 10 side to reduce the diameter. Then, the proximity switch 23 detects this, the transmitter 21 operates, the radio wave emitted from the antenna 22 is received by the receiver display 25, and the enlarged wings 13, 13 are centrifugally reduced. do.
【００３０】そして、図１６に示すように、拡径翼１３
の縮径状態で油圧シリンダ３２に給油して加圧リング桁
３０をピストンロッド３１に沿って上昇させ、図１７に
示すように、ケリーパイプ７にカンザシ４１を嵌めてロ
ータリーテーブル５に吊支した状態でドリルケーシング
８ｃにドリルケーシング８ｄを継ぎ足す。Then, as shown in FIG.
In the state of reduced diameter, oil was supplied to the hydraulic cylinder 32 to raise the pressure ring girder 30 along the piston rod 31. As shown in FIG. In this state, the drill casing 8d is added to the drill casing 8c.
【００３１】ついで、図１８に示すように、カンザシ４
１を外してドリルケーシング８を下降させてドリルケー
シング８ａを軸孔５３に着底させ、図１９に示すよう
に、ケリーパイプ７、ロータリーテーブル５及び加圧リ
ング桁３０を順次取り外し、図２０に示すように、井筒
１ａの上に井筒１ｂを載置して連結した後、加圧リング
桁３０を載置し、図２１に示すように、加圧リング桁３
０にロータリーテーブル５を載置する。Next, as shown in FIG.
1, the drill casing 8 is lowered, and the drill casing 8a is settled in the shaft hole 53. As shown in FIG. 19, the kelly pipe 7, the rotary table 5 and the pressure ring girder 30 are sequentially removed, and FIG. As shown, after the well 1b is placed on the well 1a and connected, the pressure ring girder 30 is placed thereon and the pressure ring girder 3 is placed as shown in FIG.
The rotary table 5 is placed at 0.
【００３２】そして、図２２に示すように、ケリーパイ
プ７をドリルケーシング８ｄに嵌合してケーシング回転
駆動装置６と係合する。以後、図１３〜図２２の工程を
繰り返しながら所要数の井筒１，１ａ，１ｂ…を沈設す
る。Then, as shown in FIG. 22, the kelly pipe 7 is fitted into the drill casing 8d and engaged with the casing rotation driving device 6. Thereafter, the required number of wells 1, 1a, 1b,... Is laid down while repeating the steps of FIGS.
【００３３】なお、以上の説明及び図２３（Ａ）に示す
ように、立坑５２は上記のように井筒１の外径Ｄ3と同
じ範囲内で行うこととしたが、図２３（Ｂ）に示すよう
に、井筒１の外径Ｄ3よりも大きい立坑５２ａを掘削し
てもよく、また、図２３（Ｃ）に示すように、井筒１の
内径Ｄ6よりも大きく、かつ、外径Ｄ3よりも小さい立坑
５２ｂを掘削し、若しくは、図２３（Ｄ）に示すよう
に、井筒１の内径Ｄ6の立坑５２ｃを掘削することとし
てもよい。これらの立坑５２〜５２ｃは拡径翼１３，１
３の開き角度を調節することで容易に掘削できる。As described above and as shown in FIG. 23A, the shaft 52 is formed within the same range as the outer diameter D 3 of the well tube 1 as described above. as shown, may be drilled larger pit 52a than the outer diameter D 3 of the well 1, and as shown in FIG. 23 (C), greater than the inner diameter D 6 of the well 1, and the outer diameter D the small vertical shaft 52b than 3 drilled, or, as shown in FIG. 23 (D), it is also possible to drill a vertical shaft 52c of the inside diameter D 6 of the well 1. These shafts 52 to 52c are provided with expanded wings 13, 1
Excavation can be easily performed by adjusting the opening angle of 3.
【００３４】そして、図２３（Ｃ），（Ｄ）の場合に
は、井筒１の直下の掘削が完全になされていないので、
井筒１は落下することなく保持される。したがって、立
坑５２ｂ，５２ｃを所定の深さで掘削した後、その掘削
を止め、かつ、井筒１を圧入させると、刃先下２９の土
砂等は崩れて井筒１内に移動させることができるから、
これを前記同様にグラブハンマー４４で揚土することが
できる。そのため、本発明の井筒沈設工法によれば、掘
削地盤の硬・軟度や井筒１の周面摩擦と井筒自重との関
係、及び、圧入装置による井筒圧し下げ能力などの諸要
因を勘案して制御しながら井筒沈設施工ができる。In the case of FIGS. 23 (C) and 23 (D), the excavation just below the well 1 has not been completely performed.
The well 1 is held without falling. Therefore, after excavating the shafts 52b and 52c to a predetermined depth, when the excavation is stopped and the well 1 is press-fitted, the soil and the like under the cutting edge 29 collapses and can be moved into the well 1
This can be excavated with the grab hammer 44 as described above. Therefore, according to the well laying method of the present invention, the relationship between the hardness and softness of the excavated ground, the peripheral friction of the well 1 and the well weight of the well, and various factors such as the ability to lower the well by the press-fitting device are taken into consideration. Izutsu laying work can be performed while controlling.
【００３５】[0035]
【発明の効果】以上説明したこの発明によれば、掘削刃
を備えた拡径翼にて井筒の刃先下を掘削しながらＰＣウ
エル又はケーソン等の井筒を沈設する工法であるから、
無人化状態での効率的な立坑掘削と井筒沈設工事を並行
することができて、施工能率が向上する。また、拡径翼
は井筒の外径よりも大きい立坑、井筒の内径と略同じ内
径の立坑、井筒の内径よりも大きくて外径よりも小さい
立坑を任意に掘削できるために、掘削地盤の硬・軟度や
井筒の周面摩擦と井筒自重との関係、及び、圧入装置に
よる井筒圧し下げ能力などの諸要因を勘案して制御した
井筒沈設施工を可能にする。According to the present invention described above, a method for digging a well such as a PC well or a caisson while excavating below the cutting edge of the well using a diameter-enlarging wing provided with a digging blade.
Efficient shaft excavation in an unmanned state and wellbore laying work can be performed in parallel, improving construction efficiency. In addition, the expanded wing can excavate a shaft that is larger than the outer diameter of the well, an inner shaft that is approximately the same as the inner diameter of the well, and a shaft that is larger than the inner diameter of the well and smaller than the outer diameter. -It enables the construction of the Izutsu laydown controlled in consideration of various factors such as the relationship between the softness and the friction of the peripheral surface of the Izutsu and the weight of the Izutsu, and the ability to lower and lower the Izutsu by the press-in device.
【００３６】また、制御圧入とは最適な圧入荷重で沈設
を行うことであるから、地盤に過負荷を与えず周辺への
影響を防止するとともに、反力設備、圧入設備を必要最
小限の簡素なものにすることができる。また、姿勢制御
に必要な刃先抵抗を確保することにより、井筒の急激沈
下を防止するとともに高精度な品質を確保することがで
きる。In addition, since the control press-fitting is to perform the submersion with the optimum press-fitting load, the ground is not overloaded and the influence on the surroundings is prevented. It can be something. In addition, by securing the cutting edge resistance necessary for the attitude control, it is possible to prevent rapid sinking of the well tube and to ensure high-precision quality.
【００３７】さらに、ドリルケーシングに開口部を開設
してその近傍に拡径翼を開閉可能に設けるか、若しく
は、ドリルケーシングに嵌合した拡径ドリルパイプに拡
径翼を開閉可能に設けた掘削装置であるから、構成単純
にして構造簡単でコスト低廉、保守点検が容易であり、
しかも、拡径翼の拡開範囲内で径を異にする立坑を任意
に掘削できる。Further, a drilling is provided by opening an opening in a drill casing and providing an expanding wing in the vicinity thereof so as to be openable or closable, or by providing an expanding wing in a drilling pipe fitted into the drill casing so as to be capable of opening and closing. Since it is a device, its structure is simple, its structure is simple, its cost is low, its maintenance and inspection are easy,
Moreover, it is possible to arbitrarily excavate shafts having different diameters within the expanding range of the expanding wing.
【図１】この発明の実施の形態を示す一部断面正面図FIG. 1 is a partial sectional front view showing an embodiment of the present invention.
【図２】拡径翼を開いたこの発明の要部正面図FIG. 2 is a front view of a main part of the present invention with the expanded wings opened.
【図３】ドリルケーシングの平面図FIG. 3 is a plan view of a drill casing.
【図４】拡径翼を閉じた状態の拡径ドリルパイプとその
下方のリングを示す正面図FIG. 4 is a front view showing the enlarged diameter drill pipe with the enlarged diameter wing closed and a ring below the enlarged diameter drill pipe;
【図５】図２のＡ−Ａ端面図FIG. 5 is an AA end view of FIG. 2;
【図６】拡径翼を開いた図２のＡーＡ端面図FIG. 6 is an AA end view of FIG. 2 with an expanded wing opened;
【図７】図２のＢ−Ｂ断面図FIG. 7 is a sectional view taken along line BB of FIG. 2;
【図８】拡径翼を開いた図２のＢ−Ｂ断面図8 is a sectional view taken along the line BB of FIG. 2 with the expanded wings opened.
【図９】井筒沈設第１工程図FIG. 9 is a first process diagram of laying down a well.
【図１０】井筒沈設第２工程図FIG. 10 is a diagram showing the second process of laying down the well.
【図１１】井筒沈設第３工程図FIG. 11 is a diagram showing a third process of submerging a well.
【図１２】井筒沈設第４工程図FIG. 12 is a diagram showing a fourth process of submerging a well.
【図１３】井筒沈設第５工程図FIG. 13 is a diagram showing the fifth process of submerging a well.
【図１４】井筒沈設第６工程図FIG. 14 is a diagram showing a sixth process of submerging a well.
【図１５】井筒沈設第７工程図FIG. 15 is a diagram showing the seventh process of submerging a well.
【図１６】井筒沈設第８工程図FIG. 16 is a diagram showing the eighth process of submerging a well.
【図１７】井筒沈設第９工程図FIG. 17 is a diagram showing the ninth process of submerging the well
【図１８】井筒沈設第１０工程図FIG. 18 is a diagram showing the tenth process of submerging a well.
【図１９】井筒沈設第１１工程図FIG. 19 is a diagram showing the eleventh process of submerging a well.
【図２０】井筒沈設第１２工程図FIG. 20 is a diagram showing a twelfth process of submerging a well.
【図２１】井筒沈設第１３工程図FIG. 21 is a diagram showing the thirteenth process of submerging the well.
【図２２】井筒沈設第１４工程図FIG. 22 is a diagram showing a fourteenth process for setting down a well.
【図２３】井筒沈設のために掘削する立坑の例を示す断
面側面図FIG. 23 is a cross-sectional side view illustrating an example of a shaft excavated for setting a well pipe.
１…井筒 ２…アンカー杭 ３…ベースフレーム ４…円孔 ５…ロータリーテーブル ６…ケーシング回転駆動装置 ７…ケリーパイプ ８，８ａ，８ｂ…ドリルケーシング ９，１２，１７，１８…掘削刃 １０…拡径ドリルパイプ １１…スクレーパ １３…拡径翼 １４…ヒンジ １５…アーム １６，３５…開口部 １９…拡径孔 ３０…加圧リング桁 ３１…ピストンロッド ３２…油圧シリンダ ３６…ストッパー ３７…ナット ３８…ボルト ４４…ハンマーグラブ ５０…穴 ５２…立坑 ５３…軸孔 DESCRIPTION OF SYMBOLS 1 ... Well cylinder 2 ... Anchor pile 3 ... Base frame 4 ... Circular hole 5 ... Rotary table 6 ... Casing rotation drive device 7 ... Kelly pipe 8, 8a, 8b ... Drill casing 9, 12, 17, 18 ... Drilling blade 10 ... Expansion Diameter drill pipe 11 ... Scraper 13 ... Expansion wing 14 ... Hinge 15 ... Arm 16,35 ... Opening 19 ... Expansion hole 30 ... Pressure ring girder 31 ... Piston rod 32 ... Hydraulic cylinder 36 ... Stopper 37 ... Nut 38 ... Bolt 44 ... Hammer grab 50 ... Hole 52 ... Shaft 53 ... Shaft hole
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.7，ＤＢ名) E02D 23/08 E02D 7/00 E21B 7/20 E21D 1/04 ──────────────────────────────────────────────────続 き Continued on the front page (58) Fields surveyed (Int.Cl. 7 , DB name) E02D 23/08 E02D 7/00 E21B 7/20 E21D 1/04
Claims (9)
に配置してその井筒内にドリルケーシングを挿入し、ド
リルケーシングの下端に植設した掘削刃及びドリルケー
シングの外周部に所定角度内で拡開可能に軸着した拡径
翼の側部及び底部に植設した掘削刃にて、井筒刃先下の
掘削を行い井筒を制御しながら沈下する一方、ドリルケ
ーシングの下端部付近に開設した開口部から掘削土砂を
ドリルケーシング内に導入してハンマーグラブで揚土す
ることを特徴とする井筒沈設工法。1. A well, such as a caisson or a well, is disposed so as to be able to be sunk, a drill casing is inserted into the well, and a drilling blade implanted at a lower end of the drill casing and an outer peripheral portion of the drill casing are extended within a predetermined angle. With the excavating blades implanted on the side and bottom of the expanding wing attached to the openable shaft, excavation is performed under the cutting edge of the well and the sink is controlled while controlling the well, while the opening established near the lower end of the drill casing A method of laying down a well, characterized by introducing excavated earth and sand into a drill casing and excavating it with a hammer grab.
同等若しくはそれ以上の範囲で行うことを特徴とする請
求項１記載の井筒沈設工法。2. The method according to claim 1, wherein the excavation by the enlarged wing is performed within a range equal to or larger than the outer diameter of the well.
同等若しくはそれ以下の範囲内で行うことを特徴とする
請求項１記載の井筒沈設工法。3. The method according to claim 1, wherein the excavation by the enlarged wing is performed within a range equal to or less than the inner diameter of the well.
りも小さく、かつ、内径よりも大きい範囲内で行うこと
を特徴とする請求項１記載の井筒沈設工法。4. The method according to claim 1, wherein the excavation by the enlarged wing is performed within a range smaller than an outer diameter of the well and larger than an inner diameter of the well.
ーシングの下端部付近に開口部を設け、その開口部の一
側部側の周側部に拡径翼を所定角度内で開閉可能に軸着
するとともに、該拡径翼の側部及び底部にそれぞれ掘削
刃を植設し、ドリルケーシング上端部付近においてケー
シング回転駆動装置をロータリーテーブルに固定したこ
とを特徴とする井筒沈設装置。5. An opening is provided in the vicinity of the lower end of a drill casing having a drilling blade implanted at the lower end periphery, and the enlarged wing can be opened and closed within a predetermined angle on a peripheral side on one side of the opening. And a casing rotation drive unit fixed to a rotary table near an upper end portion of a drill casing, wherein a drilling blade is implanted on each of a side portion and a bottom portion of the enlarged-diameter wing.
ーシングの下端部付近に開口部を設け、その開口部の一
側部側の周側部に拡径翼を所定角度内で開閉可能に軸着
するとともに、該拡径翼の側部及び底部にそれぞれ掘削
刃を植設し、ドリルケーシング上端部付近においてケー
シング回転駆動装置をロータリーテーブルに固定し、か
つ、井筒を圧下させる圧入装置を有することを特徴とす
る井筒沈設装置。6. An opening is provided in the vicinity of the lower end of a drill casing having a drilling blade implanted at the lower end periphery, and a large-diameter wing can be opened and closed within a predetermined angle on a peripheral side on one side of the opening. A drilling blade is implanted on each of the side and bottom of the enlarged-diameter wing, and a casing rotation driving device is fixed to a rotary table near the upper end of a drill casing, and a press-fitting device for rolling down a well tube. A well setting device, comprising:
ーシングの下端部付近に開口部を設け、その開口部と合
致する開口部を有して周側部に拡径翼を軸着した拡径ド
リルパイプを、前記ドリルケーシングに嵌合するととも
に、該拡径翼の側部及び底部にそれぞれ掘削刃を植設
し、該拡径翼の内側に一端部を軸着したアームの他端部
を前記ドリルケーシングに軸着し、そのドリルケーシン
グ又は継ぎ足したドリルケーシング上端部付近において
ケーシング回転駆動装置をロータリーテーブルに固定し
たことを特徴とする井筒沈設装置。7. An opening is provided in the vicinity of the lower end of a drill casing having a drilling blade implanted at the lower edge, and an enlarged wing is axially mounted on the peripheral side with an opening corresponding to the opening. The other end of an arm having an enlarged diameter drill pipe fitted into the drill casing, and excavating blades respectively implanted on a side portion and a bottom portion of the enlarged diameter wing, and one end portion axially mounted inside the enlarged diameter wing. A casing rotating drive unit is fixed to a rotary table in the vicinity of an upper end portion of the drill casing or a refilled drill casing.
ーシングの下端部付近に開口部を設け、その開口部と合
致する開口部を有して周側部に拡径翼を軸着した拡径ド
リルパイプを、前記ドリルケーシングに嵌合するととも
に、該拡径翼の側部及び底部にそれぞれ掘削刃を植設
し、該拡径翼の内側に一端部を軸着したアームの他端部
を前記ドリルケーシングに軸着し、そのドリルケーシン
グ又は継ぎ足したドリルケーシング上端部付近において
ケーシング回転駆動装置をロータリーテーブルに固定
し、かつ、井筒を圧下させる圧入装置を有することを特
徴とする井筒沈設装置。8. An opening is provided in the vicinity of the lower end of a drill casing having a drilling blade implanted at the lower edge, and an enlarged wing is axially mounted on the peripheral side with an opening corresponding to the opening. The other end of an arm having an enlarged diameter drill pipe fitted into the drill casing, and excavating blades respectively implanted on a side portion and a bottom portion of the enlarged diameter wing, and one end portion axially mounted inside the enlarged diameter wing. Characterized in that it has a press-fitting device for fixing a casing rotary drive device to a rotary table near the upper end of the drill casing or the drill casing added thereto, and lowering the well. apparatus.
口部を設け、該開口部から突出するストッパーをドリル
ケーシングの外周面に突設する一方、該ストッパーに当
接する他の一つのストッパーを移動可能に拡径ドリルパ
イプに取り付けて拡径翼の開き角度を調節できるように
したことを特徴とする請求項５又は６記載の井筒沈設装
置。9. An enlarged-diameter drill pipe is provided with an opening having a predetermined width in a circumferential direction, and a stopper protruding from the opening is provided on an outer peripheral surface of the drill casing, and another stopper abutting on the stopper is provided. 7. An apparatus according to claim 5, wherein the diverter is movably attached to a diameter-expanding drill pipe so that an opening angle of the diameter-expanding blade can be adjusted.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9126130A JP3031876B2 (en) | 1997-05-16 | 1997-05-16 | Izutsu laying method and its device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9126130A JP3031876B2 (en) | 1997-05-16 | 1997-05-16 | Izutsu laying method and its device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH10317376A JPH10317376A (en) | 1998-12-02 |
| JP3031876B2 true JP3031876B2 (en) | 2000-04-10 |
Family
ID=14927417
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9126130A Expired - Fee Related JP3031876B2 (en) | 1997-05-16 | 1997-05-16 | Izutsu laying method and its device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3031876B2 (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4507226B2 (en) * | 2000-08-08 | 2010-07-21 | 鹿島建設株式会社 | Vertical excavation method and apparatus |
| JP4504752B2 (en) * | 2004-07-16 | 2010-07-14 | 株式会社ピーエス三菱 | Construction method and apparatus for tubular precast concrete member |
| JP4505841B2 (en) * | 2005-04-18 | 2010-07-21 | 株式会社ピーエス三菱 | Construction method of pier frame using Izutsuru foundation |
| JP4896549B2 (en) * | 2006-03-14 | 2012-03-14 | 靖子 長谷川 | Structure setting method |
| JP6152274B2 (en) * | 2013-01-25 | 2017-06-21 | システム計測株式会社 | Expanded bucket |
| JP6077986B2 (en) * | 2013-12-13 | 2017-02-08 | 株式会社高知丸高 | Obstacle ground pile placing device and method of placing a steel pipe pile on the obstacle ground |
| CN110685695B (en) * | 2019-11-28 | 2021-10-12 | 中国铁建重工集团股份有限公司 | Vertical shaft construction system and method from top to bottom |
-
1997
- 1997-05-16 JP JP9126130A patent/JP3031876B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH10317376A (en) | 1998-12-02 |
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