JP2002138475A - Method and device for cutting and pulling out existing pile - Google Patents
Method and device for cutting and pulling out existing pileInfo
- Publication number
- JP2002138475A JP2002138475A JP2000329507A JP2000329507A JP2002138475A JP 2002138475 A JP2002138475 A JP 2002138475A JP 2000329507 A JP2000329507 A JP 2000329507A JP 2000329507 A JP2000329507 A JP 2000329507A JP 2002138475 A JP2002138475 A JP 2002138475A
- Authority
- JP
- Japan
- Prior art keywords
- casing
- existing pile
- pressure water
- ultra
- high pressure
- 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.)
- Granted
Links
Landscapes
- Placing Or Removing Of Piles Or Sheet Piles, Or Accessories Thereof (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】 本発明は地中に埋設され、
その後不要となった基礎杭やその他の既設杭を引き抜き
撤去するための工法及びその装置に関するものである。The present invention is buried underground,
The present invention relates to a method and apparatus for pulling out and removing foundation piles and other existing piles that are no longer needed.
【０００２】[0002]
【従来の技術】 建築物の立て替え等に伴い、既に地中
に埋設されている既設杭等の撤去を行う場合、地下に打
ち込まれた既設杭は、長年の間に地盤に固着安定されて
しまい、その引き抜きには巨大な引き抜き力が必要とな
る。2. Description of the Related Art Existing piles that have been buried in the ground are to be removed and stuck to the ground for many years when existing piles are buried underground. However, it requires a huge pulling force to pull it out.
【０００３】コンクリート杭等で長尺の既設杭の撤去に
は、既設杭より径の大きい鋼管等のケーシングを、既
設杭を囲繞するようにして既設杭の下部最先端まで地中
に掘進してから、このケーシングを引き上げることによ
り、ケーシングと既設杭との間の土砂による摩擦抵抗を
利用して既設杭をケーシングと一体に引き上げる方法
や、さらに、のケーシングの埋設後に、既設杭の中
心部を軸方向に掘削して貫通孔を設け、長尺吊り下げ材
下方先端に開放可能な複数の係止爪を取り付け、既設杭
下端縁部に係止爪を係止して引き上げる方法や、ケー
シング内に水やベントナイト等を加えケーシング内を泥
濘化することによって既設杭の引き上げの際の摩擦抵抗
を軽減し、既設杭のみを引き上げるようにする方法があ
った。In order to remove an existing long pile using a concrete pile or the like, a casing such as a steel pipe having a diameter larger than that of the existing pile is excavated to the bottom of the existing pile so as to surround the existing pile. Then, by pulling up this casing, a method of pulling up the existing pile integrally with the casing using the frictional resistance due to earth and sand between the casing and the existing pile, and furthermore, after embedding the casing, the center of the existing pile is A method of excavating in the axial direction, providing a through hole, attaching a plurality of openable claws to the lower end of the long hanging material, locking the claws to the lower edge of the existing pile, and pulling up the inside of the casing There was a method of reducing the frictional resistance when pulling up existing piles by adding water, bentonite, etc. to the inside of the casing to make it muddy, and pulling up only the existing piles.
【０００４】[0004]
【発明が解決しようとする課題】 しかし、前記の方
法の場合は、ケーシング内の土砂の性状によっては既設
杭の重量を支えきれずに、既設杭を引き上げることがで
きないこともあり、の方法の場合は、貫通孔を掘削し
たり、特別な引き上げ装置が必要となる。また、の方
法の場合は、ケーシング内を泥濘化するための水等が必
要であり、コストがかかり、施工期間も長くなる上、水
等を注入した後の地盤の悪化なども問題となる。さら
に、軟弱地盤に埋設された既設杭を引き抜くと、改めて
軟弱地盤補強を行わねばならない場合もある。However, in the case of the above-mentioned method, the existing pile may not be able to be lifted because the weight of the existing pile cannot be supported depending on the properties of the earth and sand in the casing. In such a case, it is necessary to dig through holes or special lifting devices. In the case of the method described above, water or the like for muddying the inside of the casing is required, so that the cost is increased, the construction period is lengthened, and the ground is deteriorated after the water or the like is injected. Furthermore, when an existing pile buried in soft ground is pulled out, it may be necessary to reinforce soft ground.
【０００５】[0005]
【課題を解決するための手段】 本発明は上記諸問題を
解決するためになされたものであって、下記構成の既設
杭の切断・引き抜き工法及び既設杭の切断・引き抜き装
置である。 （１）既設杭外径より大径のケーシングと、その下端部
に取り付けられた掘削用カッターと、該カッターの直上
に配設された既設杭中心方向に超高圧水を噴射するノズ
ルと、前記ケーシングを既設杭の所定深度まで回転しな
がら、既設杭を囲繞するようにして地中に掘進させるケ
ーシング掘進装置と、前記ケーシング外壁に添わせて配
管された超高圧水送給用パイプと、同パイプに超高圧水
を供給するための超高圧水発生装置を備えてなる既設杭
の切断・引き抜き装置を用い、前記ケーシングを既設杭
の周囲で回動させながら掘進し、所定深度まで掘進した
ところで掘進を停止し、ケーシングを回動させながら前
記ノズルから超高圧水を噴射して既設杭を切り離し可能
な深さ部位まで切削してから、切削された既設杭上部を
切り離して引き抜き、既設杭下部はそのまま残置し、ケ
ーシングを引き抜き回収することを特徴とする既設杭の
切断・引き抜き工法。 （２）既設杭外径より大径のケーシングと、その下端部
に取り付けられた掘削用カッターと、同様にケーシング
下端部に配設された超高圧水をケーシング下方に噴射す
るノズルと、前記カッターの直上に配設された既設杭中
心方向に超高圧水を噴射するノズルと、前記ケーシング
を既設杭の所定深度まで回転しながら、既設杭を囲繞す
るようにして地中に掘進させるケーシング掘進装置と、
前記ケーシング外壁に添わせて配管された超高圧水送給
用パイプと、同パイプに超高圧水を供給するための超高
圧水発生装置と、上部ケーシング外壁に超高圧水分配装
置を備えてなる既設杭の切断・引き抜き装置を用い、前
記ケーシングを既設杭の周囲で回動させながら、掘進中
はケーシング下方に噴射するノズルのみに超高圧水を分
配し、ケーシングを所定深度まで掘進させたところで掘
進を停止し、ケーシングを回動させながら既設杭中心方
向に超高圧水を噴射するノズルのみに超高圧水を分配し
て既設杭を切り離し可能な深さ部位まで切削してから、
切削された既設杭上部を切り離して引き抜き、既設杭下
部はそのまま残置し、ケーシングを引き抜き回収するこ
とを特徴とする既設杭の切断・引き抜き工法。Means for Solving the Problems The present invention has been made to solve the above-mentioned problems, and is an existing pile cutting / pulling method and an existing pile cutting / pulling apparatus having the following configuration. (1) a casing having a diameter larger than the outer diameter of the existing pile, a cutter for excavation attached to a lower end of the casing, a nozzle which is disposed immediately above the cutter and injects ultra-high pressure water toward the center of the existing pile, A casing digging device for digging into the ground so as to surround the existing pile while rotating the casing to a predetermined depth of the existing pile, and an ultra-high pressure water supply pipe piped along the outer wall of the casing. Using an existing pile cutting / pulling device equipped with an ultra-high pressure water generator for supplying ultra-high pressure water to the pipe, excavating while rotating the casing around the existing pile, and excavating to a predetermined depth Stop excavation, spray ultra-high pressure water from the nozzle while rotating the casing, cut the existing pile to a depth where it can be cut off, then cut off the upper part of the cut existing pile and pull it out , Existing pile bottom as it is leaving, cutting and withdrawal method of the existing pile and recovering pull the casing. (2) A casing having a diameter larger than the existing pile outer diameter, an excavating cutter attached to the lower end thereof, a nozzle for jetting ultra-high pressure water similarly arranged at the lower end of the casing downward of the casing, and the cutter. A nozzle that injects ultra-high pressure water in the direction of the center of the existing pile disposed directly above the pile, and a casing digging device that digs into the ground so as to surround the existing pile while rotating the casing to a predetermined depth of the existing pile. When,
An ultra-high pressure water supply pipe provided along the casing outer wall, an ultra high pressure water generator for supplying ultra high pressure water to the pipe, and an ultra high pressure water distributor on the upper casing outer wall. Using an existing pile cutting / pulling-out device, while rotating the casing around the existing pile, during excavation, distribute ultra-high pressure water only to the nozzles jetting down the casing, and where the casing is excavated to a predetermined depth. Stop excavation, distribute the ultra-high pressure water only to the nozzle that injects the ultra-high pressure water toward the center of the existing pile while rotating the casing, and cut the existing pile to a depth that can be separated,
A method of cutting and pulling out existing piles, characterized in that the cut upper part of the existing pile is separated and pulled out, the lower part of the existing pile is left as it is, and the casing is pulled out and collected.
【０００６】（３）切断された既設杭上部を引き抜いた
後の空洞部に充填材を充填してからケーシングを引き抜
き回収することを特徴とする前項（１）又は（２）に記
載の既設杭の切断・引き抜き工法。 （４）前記切断された既設杭上部を地上に少し引き上げ
た段階で、その上部を短く切断して撤去する工程を繰り
返しながら、杭引き抜きを行うことを特徴とする前項
（１）〜（３）のいずれか１項に記載の既設杭の切断・
引き抜き工法。 （５）前記超高圧水が、研磨剤を混合してなるものであ
ることを特徴とする前項（１）〜（４）のいずれか１項
に記載の既設杭の切断・引き抜き工法。(3) The existing pile according to the above (1) or (2), wherein the casing is drawn out and collected after filling the cavity after the cut-off existing pile is pulled out with the filler. Cutting and drawing method. (4) The piles are pulled out while repeating the process of cutting the upper part of the existing pile slightly above the ground and slightly removing the upper part and removing the pile at the stage. Cutting of existing piles according to any one of
Drawing method. (5) The method for cutting and pulling out an existing pile according to any one of the above (1) to (4), wherein the ultrahigh-pressure water is obtained by mixing an abrasive.
【０００７】（６）既設杭外径より大径のケーシング
と、その下端部に取り付けられた掘削用カッターと、該
カッターの直上に配設された既設杭中心方向に超高圧水
を噴射するノズルと、前記ケーシングを既設杭の所定深
度まで回転しながら、既設杭を囲繞するようにして地中
に掘進させるケーシング掘進装置と、前記ケーシング外
壁に添わせて配管された超高圧水送給用パイプと、同パ
イプに超高圧水を供給するための超高圧水発生装置を備
えてなる既設杭の切断・引き抜き装置であって、前記ケ
ーシング掘進装置が、前記ケーシングを既設杭の周囲で
回動させながら掘進し、所定深度まで掘進したところで
掘進を停止し、ケーシングを回動させながら前記ノズル
から超高圧水を既設杭中心方向へ噴射して既設杭を切り
離し可能な深さ部位まで切削するように構成したもので
あることを特徴とする既設杭の切断・引き抜き装置。 （７）既設杭外径より大径のケーシングと、その下端部
に取り付けられた掘削用カッターと、同様にケーシング
下端部に配設された超高圧水をケーシング下方に噴射す
るノズルと、前記カッターの直上に配設された既設杭中
心方向に超高圧水を噴射するノズルと、前記ケーシング
を既設杭の所定深度まで回転しながら、既設杭を囲繞す
るようにして地中に掘進させるケーシング掘進装置と、
前記ケーシング外壁に添わせて配管された超高圧水送給
用パイプと、同パイプに超高圧水を供給するための超高
圧水発生装置と、上部ケーシング外壁に超高圧水分配装
置を備えてなる既設杭の切断・引き抜き装置であって、
前記超高圧水分配装置が、前記ケーシングを既設杭の周
囲で回動させながら、掘進中はケーシング下方に噴射す
るノズルのみに超高圧水を分配し、ケーシングを所定深
度まで掘進させたところで掘進を停止し、ケーシングを
回動させながら既設杭の切削を行うときは、中心方向に
超高圧水を噴射するノズルのみに超高圧水を分配するよ
うに構成したものであることを特徴とする既設杭の切断
・引き抜き装置。 （８）前記切断された既設杭上部を地上に少し引き上げ
た段階で、その上部を短く切断する既設引き上げ杭切断
装置を備えてなることを特徴とする前項（６）又は
（７）に記載の既設杭の切断・引き抜き装置。(6) A casing having a diameter larger than the outer diameter of the existing pile, a cutter for excavation attached to the lower end thereof, and a nozzle for injecting ultra-high pressure water toward the center of the existing pile disposed immediately above the cutter. A casing digging device for digging into the ground so as to surround the existing pile while rotating the casing to a predetermined depth of the existing pile, and an ultra-high-pressure water supply pipe piped along the casing outer wall And an existing pile cutting / pulling device comprising an ultra-high pressure water generating device for supplying ultra high pressure water to the pipe, wherein the casing excavating device rotates the casing around the existing pile. When excavating to a predetermined depth, the excavation is stopped, and while rotating the casing, the high-pressure water is sprayed from the nozzle toward the center of the existing pile to allow the existing pile to be separated. Cutting and pulling device of the existing pile, characterized in that in those configured to cut. (7) A casing having a diameter larger than the existing pile outer diameter, a drilling cutter attached to a lower end of the casing, a nozzle similarly arranged at a lower end of the casing for injecting ultrahigh-pressure water downward from the casing, and the cutter. A nozzle that injects ultra-high pressure water in the direction of the center of the existing pile disposed directly above the pile, and a casing digging device that digs into the ground so as to surround the existing pile while rotating the casing to a predetermined depth of the existing pile. When,
An ultra-high pressure water supply pipe provided along the casing outer wall, an ultra high pressure water generator for supplying ultra high pressure water to the pipe, and an ultra high pressure water distributor on the upper casing outer wall. A device for cutting and pulling out existing piles,
The ultra-high-pressure water distribution device distributes ultra-high-pressure water only to the nozzles that are sprayed below the casing during excavation while rotating the casing around the existing pile, and excavates when the casing is excavated to a predetermined depth. When cutting the existing pile while stopping and rotating the casing, the existing pile is configured to distribute the ultra-high pressure water only to the nozzle that injects the ultra-high pressure water in the center direction. Cutting and drawing equipment. (8) The device according to the above (6) or (7), further comprising an existing lifting pile cutting device that cuts the upper portion of the existing pile slightly above the ground to slightly cut the upper portion. Cutting and pulling device for existing piles.
【０００８】[0008]
【発明の実施の形態】 本発明の実施の形態を図面に基
づいて説明する。図１は、本発明実施例の既設杭の切断
・引き抜きのためのケーシング掘進装置の構成図であ
る。図２は、ケーシング先端下部の拡大断面図を示す。
図３は、本発明実施例のケーシング掘進装置を用いて既
設杭を切断・引き抜く作業手順及び抜き穴の埋めもどし
作業工程を説明する作業工程説明図を示す。図４は、他
の例のケーシング先端下部の拡大断面図を示す。Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a configuration diagram of a casing excavating device for cutting and pulling out an existing pile according to an embodiment of the present invention. FIG. 2 shows an enlarged cross-sectional view of the lower part of the front end of the casing.
FIG. 3 is a work process explanatory view for explaining a work procedure for cutting / pulling out an existing pile and a work process for refilling a punched hole using the casing excavating device of the embodiment of the present invention. FIG. 4 is an enlarged cross-sectional view of the lower end of the casing tip of another example.
【０００９】図１のケーシング掘進装置２３において、
杭引き抜き機１を敷き鉄板２等を配置した上にセット
し、ブーム３先端に懸垂式リーダ４を係止して、これか
ら引き抜く既設杭の長さを考慮して複数本の懸垂式リー
ダ４を結合し、最下部の懸垂式リーダ４が動かないよう
にキャッチホーク５で支える。しかる後に、アースオー
ガ掘進機構６に、最上部となるケーシング７を超高圧水
用回転ジョイント８を介して接続し、次いで懸垂式リー
ダ４の長さに合わせてケーシング７を複数本結合する。
ケーシング７最下部には掘削機構付きケーシング７’を
取り付ける。掘進時に必要な超高圧水は超高圧水発生装
置１０で作られ、フレキシブルな超高圧水用配管１１で
送水され、超高圧水用回転ジョイント８を介して、パイ
プ９に接続される。In the casing excavating device 23 shown in FIG.
The pile pulling machine 1 is laid, and the iron plate 2 and the like are arranged and set. The suspension type leader 4 is locked at the end of the boom 3 and a plurality of the suspension type leaders 4 are taken into consideration in consideration of the length of the existing pile to be pulled out. It is connected and supported by a catch hawk 5 so that the lowermost suspension type reader 4 does not move. Thereafter, the uppermost casing 7 is connected to the earth auger excavating mechanism 6 via the ultrahigh-pressure water rotary joint 8, and then a plurality of casings 7 are connected in accordance with the length of the suspended reader 4.
At the bottom of the casing 7, a casing 7 'with an excavating mechanism is attached. The ultra-high pressure water required at the time of excavation is produced by the ultra-high pressure water generator 10, sent through a flexible ultra-high pressure water pipe 11, and connected to the pipe 9 via the ultra-high pressure water rotary joint 8.
【００１０】図２において、引き抜き撤去すべき既設杭
１６の外径より大径の掘削機構付きケーシング７’を回
転しながら、その外周面にスクリュー状の刃（切削羽
根）を備えた掘進具１２と掘削用カッター１３によって
地盤を所定深度まで掘進し、所定深度まで掘進したとこ
ろで掘進を停止し、ケーシング７’を回転しながら超高
圧水をパイプ９を介して供給し、ケーシング７’下端の
開口部１５に面して噴出口を有するノズル１４から超高
圧水を既設杭１６の側面に噴射することにより、既設杭
１６を切断する。In FIG. 2, while rotating a casing 7 'with a drilling mechanism having a diameter larger than the outer diameter of an existing pile 16 to be withdrawn and removed, a drilling tool 12 having a screw-shaped blade (cutting blade) on the outer peripheral surface thereof. And the excavating cutter 13 excavates the ground to a predetermined depth. When the excavation is performed to the predetermined depth, the excavation is stopped, and ultra-high-pressure water is supplied through the pipe 9 while rotating the casing 7 ′. The existing pile 16 is cut by injecting ultra-high pressure water from a nozzle 14 having an ejection port facing the portion 15 onto the side surface of the existing pile 16.
【００１１】図３において、ａ〜ｇは既設杭を引き抜く
作業手順及び抜き穴の埋めもどし作業工程を示す。 （ａ）まず、バックホウ１７等を用いて引き抜く既設杭
１６上部の地面を、既設杭頭部が０．５ｍ位突出するま
で掘削する。 （ｂ）杭引き抜き機１を敷き鉄板２等を配置した上にセ
ットし、ケーシング７中心を既設杭１６中心と合致させ
る。 （ｃ）ケーシング７は既設杭１６を囲繞するようにして
回転しながら地中に掘進していく。この際、ケーシング
７は回転しているので、ケーシング内壁面と既設杭１６
外周面との間には摩擦抵抗の大きな接合関係がなくな
り、抵抗の少ない縁切れ状態となる。さらに、引き抜く
既設杭の長さに合わせてケーシング７を継ぎ足してい
く。 （ｄ）ケーシング７下端部が既設杭１６の切断予定箇所
に達したところで掘進を停止し、ケーシング７を回転し
ながらノズル１４（図２）から超高圧水を噴射し、既設
杭１６を切り離し可能な深さ部位まで切削する。既設杭
１６は完全に切断する必要はなく、既設杭１６外周面近
傍内部に埋設されている鉄筋を含めて若干切り込めば、
既設杭１６を引き抜く際にその位置で切断される。 （ｅ）クレーンでワイヤ１８を巻き上げ、ケーシング７
の中の既設杭１６を引き抜く。切断された下部既設杭１
６’はそのまま地中に残す。また、引き抜いた既設杭１
６は、必要があれば地表に出たところで適当な長さに切
断し、再度残りの既設杭１６を引き抜く。 （ｆ）ケーシング７がまだ地中に残っている段階で、充
填材１９として発生土又は山砂あるいはセメントベント
ナイトミルク等を充填する。 （ｇ）引き続き充填材１９を地表面まで充填してから、
ケーシング７を回転しながら引き上げる。In FIG. 3, a to g show a procedure for pulling out an existing pile and a step for filling and recovering a hole. (A) First, the ground above the existing pile 16 to be pulled out using the backhoe 17 or the like is excavated until the existing pile head projects about 0.5 m. (B) The pile pulling machine 1 is laid, and the iron plate 2 and the like are arranged and set. The center of the casing 7 is aligned with the center of the existing pile 16. (C) The casing 7 digs into the ground while rotating so as to surround the existing pile 16. At this time, since the casing 7 is rotating, the inner wall surface of the casing and the existing pile 16
There is no longer a large frictional joint between the outer peripheral surface and the outer peripheral surface. Further, the casing 7 is added in accordance with the length of the existing pile to be withdrawn. (D) When the lower end of the casing 7 reaches the scheduled cutting position of the existing pile 16, the excavation is stopped, and the high-pressure water is jetted from the nozzle 14 (FIG. 2) while rotating the casing 7, so that the existing pile 16 can be separated. To a deep depth. It is not necessary to cut the existing pile 16 completely, but if the existing pile 16 is cut slightly, including the reinforcing steel buried near the outer peripheral surface,
When the existing pile 16 is pulled out, it is cut at that position. (E) The wire 18 is hoisted by a crane and the casing 7
Pull out the existing pile 16 in. Cut lower existing pile 1
6 'is left underground. In addition, the existing pile 1
6 is, if necessary, cut to an appropriate length when it comes to the surface of the ground, and the remaining existing pile 16 is pulled out again. (F) At the stage where the casing 7 still remains in the ground, generated soil, mountain sand, cement bentonite milk, or the like is filled as the filler 19. (G) After filling the filling material 19 up to the ground surface,
The casing 7 is pulled up while rotating.
【００１２】図４において、図１の超高圧水用回転ジョ
イント８と、パイプ９，２０間に配設された図示しない
超高圧水分配装置は、ケーシング７を回転させながら掘
進する掘進中は、パイプ２０によって送水され、ケーシ
ング７’下方に設けられた開口部２２から地盤に向けて
噴射するノズル２１のみに超高圧水を分配する。また、
ケーシング７を所定深度まで掘進させたところで掘進を
停止し、ケーシング７’を回転させながら既設杭１６の
切り離し可能な深さ部位まで切削を行うときは、パイプ
９によって送水され、既設杭１６中心方向に超高圧水を
噴射するノズル１４のみに超高圧水を分配する。２つの
ノズルに対する相互の給水・停止の制御は杭引き抜き機
１の図示しない制御盤で制御する。In FIG. 4, the ultra high pressure water rotary joint 8 shown in FIG. 1 and the ultra high pressure water distribution device (not shown) disposed between the pipes 9 and 20 excavate while rotating the casing 7 during excavation. Ultra high-pressure water is distributed only to the nozzle 21 which is supplied by the pipe 20 and is jetted toward the ground from an opening 22 provided below the casing 7 '. Also,
When the casing 7 has been excavated to a predetermined depth, the excavation is stopped, and when cutting is performed to a detachable depth portion of the existing pile 16 while rotating the casing 7 ′, water is supplied by the pipe 9 and is directed toward the center of the existing pile 16. The ultra-high pressure water is distributed only to the nozzle 14 that jets the ultra-high pressure water. The control of mutual water supply / stop to the two nozzles is controlled by a control panel (not shown) of the pile pulling machine 1.
【００１３】[0013]
【発明の効果】 本願発明によれば、次のような効果が
発揮される。 （１）既設杭を途中で容易に切断でき、下部の既設杭を
地中に残すため地盤の安定維持に役立ち、不要な地下水
の出水防止もできて、より地盤の安定維持に役立つ。 （２）既設杭を途中で切断し、切断した上部既設杭のみ
引き抜く工事となるため、廃材の処理費用の節減、工期
の短縮効果が大である。 （３）ケーシングを既設杭の途中で切断するところまで
の埋入・引き上げ工事となり、工期の短縮効果が大であ
る。 （４）既設杭を途中で切断し、引き抜いたところまでの
土砂等の充填材の量で済むため、低コスト、工期短縮に
役立つ。 （５）既設杭の切断を容易にするため超高圧水の噴射に
よる切削を行うので、従来の超硬合金、ダイヤモンド等
の切削摩耗部品を使用する工法に較べ低コストであり、
長期間使用してもメンテナンスが容易である。 （６）既設杭の切断が地中で行われるため、低騒音低振
動で環境公害の問題を生ずることなく既設杭の切断・引
き抜きができる。 （７）少し引き上げられた既設杭を少しずつ切断して撤
去できるため、林立した都市ビル間の狭隘な場所におい
ても作業が容易に実施できる。 （８）引き抜き及び引き上げ工程にさほどの揚重力を要
せず、小規模な杭引き抜き機を用いて低コストで施工が
可能となる。According to the present invention, the following effects are exhibited. (1) Existing piles can be easily cut in the middle, leaving existing lower piles in the ground, helping to maintain the stability of the ground, preventing unnecessary groundwater from flowing out, and helping to maintain the stability of the ground. (2) Existing piles are cut in the middle, and only the cut upper existing piles are pulled out, which greatly reduces waste material disposal costs and construction time. (3) The embedding and lifting work is performed up to the point where the casing is cut in the middle of the existing pile, and the effect of shortening the construction period is great. (4) Existing piles are cut off halfway and only the amount of filler such as earth and sand is required up to the point where they are pulled out, which helps to reduce costs and shorten the construction period. (5) Since cutting is performed by jetting ultra-high pressure water to facilitate cutting of existing piles, the cost is lower than the conventional method using cutting wear parts such as cemented carbide and diamond.
Maintenance is easy even after long-term use. (6) Since the existing pile is cut underground, the existing pile can be cut and pulled out without causing a problem of environmental pollution with low noise and low vibration. (7) Existing piles that have been slightly lifted can be cut and removed little by little, so that work can be easily performed even in narrow places between forested urban buildings. (8) The lifting and pulling process does not require much lifting gravity, and the construction can be performed at a low cost by using a small-scale pile pulling machine.
【図１】本発明実施例の既設杭の切断・引き抜きのため
のケーシング掘進装置の構成図。FIG. 1 is a configuration diagram of a casing excavating device for cutting and pulling out an existing pile according to an embodiment of the present invention.
【図２】ケーシング先端下部の拡大断面図。FIG. 2 is an enlarged cross-sectional view of a lower end of a casing tip.
【図３】本発明実施例のケーシング掘進装置を用いて既
設杭を切断・引き抜く作業手順及び抜き穴の埋めもどし
作業工程を説明する作業工程説明図。FIG. 3 is a work process explanatory view for explaining a work procedure for cutting and pulling out an existing pile and a work process for refilling a punched hole using the casing excavating device according to the embodiment of the present invention.
【図４】他の例のケーシング先端下部の拡大断面図。FIG. 4 is an enlarged cross-sectional view of a lower portion of a casing tip in another example.
１：杭引き抜き機 ２：敷き鉄板 ３：ブーム ４：懸垂式リー
ダ ５：キャッチホーク ６：アースオー
ガ掘進機構 ７，７’：ケーシング ８：超高圧水用
回転ジョイント ９：パイプ １０：超高圧水
発生装置 １１：超高圧水用配管 １２：掘進具 １３：掘削用カッター １４：ノズル １５：開口部 １６：既設杭 １７：バックホウ １８：ワイヤ １９：充填材 ２０：パイプ ２１：ノズル ２２：開口部 ２３：ケーシング掘進装置1: Pile pulling machine 2: Laying iron plate 3: Boom 4: Suspended leader 5: Catch hawk 6: Earth auger excavation mechanism 7, 7 ': Casing 8: Rotating joint for ultra high pressure water 9: Pipe 10: Ultra high pressure water generation Apparatus 11: Pipe for ultra-high pressure water 12: Drilling tool 13: Drilling cutter 14: Nozzle 15: Opening 16: Existing pile 17: Backhoe 18: Wire 19: Filling material 20: Pipe 21: Nozzle 22: Opening 23: Casing excavator
Claims (8)
の下端部に取り付けられた掘削用カッターと、該カッタ
ーの直上に配設された既設杭中心方向に超高圧水を噴射
するノズルと、前記ケーシングを既設杭の所定深度まで
回転しながら、既設杭を囲繞するようにして地中に掘進
させるケーシング掘進装置と、前記ケーシング外壁に添
わせて配管された超高圧水送給用パイプと、同パイプに
超高圧水を供給するための超高圧水発生装置を備えてな
る既設杭の切断・引き抜き装置を用い、前記ケーシング
を既設杭の周囲で回動させながら掘進し、所定深度まで
掘進したところで掘進を停止し、ケーシングを回動させ
ながら前記ノズルから超高圧水を噴射して既設杭を切り
離し可能な深さ部位まで切削してから、切削された既設
杭上部を切り離して引き抜き、既設杭下部はそのまま残
置し、ケーシングを引き抜き回収することを特徴とする
既設杭の切断・引き抜き工法。1. A casing having a diameter larger than the diameter of an existing pile, a cutter for excavation attached to a lower end of the casing, and a nozzle for jetting ultra-high pressure water toward a center of the existing pile disposed immediately above the cutter. While rotating the casing to a predetermined depth of the existing pile, a casing digging device that digs into the ground so as to surround the existing pile, and an ultra-high pressure water supply pipe that is piped along the casing outer wall, Using an existing pile cutting / pulling device equipped with an ultra-high pressure water generator for supplying ultra-high pressure water to the pipe, excavating while rotating the casing around the existing pile, and excavating to a predetermined depth When the excavation was stopped, the ultra-high pressure water was sprayed from the nozzle while rotating the casing, and the existing pile was cut to a depth capable of being separated, and then the cut upper part of the existing pile was separated. A method of cutting and pulling out existing piles, in which the lower part of the existing pile is pulled out and the casing is pulled out and collected.
の下端部に取り付けられた掘削用カッターと、同様にケ
ーシング下端部に配設された超高圧水をケーシング下方
に噴射するノズルと、前記カッターの直上に配設された
既設杭中心方向に超高圧水を噴射するノズルと、前記ケ
ーシングを既設杭の所定深度まで回転しながら、既設杭
を囲繞するようにして地中に掘進させるケーシング掘進
装置と、前記ケーシング外壁に添わせて配管された超高
圧水送給用パイプと、同パイプに超高圧水を供給するた
めの超高圧水発生装置と、上部ケーシング外壁に超高圧
水分配装置を備えてなる既設杭の切断・引き抜き装置を
用い、前記ケーシングを既設杭の周囲で回動させなが
ら、掘進中はケーシング下方に噴射するノズルのみに超
高圧水を分配し、ケーシングを所定深度まで掘進させた
ところで掘進を停止し、ケーシングを回動させながら既
設杭中心方向に超高圧水を噴射するノズルのみに超高圧
水を分配して既設杭を切り離し可能な深さ部位まで切削
してから、切削された既設杭上部を切り離して引き抜
き、既設杭下部はそのまま残置し、ケーシングを引き抜
き回収することを特徴とする既設杭の切断・引き抜き工
法。2. A casing having a diameter larger than the existing pile outer diameter, a cutter for excavation attached to a lower end of the casing, and a nozzle for injecting ultra-high pressure water similarly disposed at a lower end of the casing below the casing, A nozzle that is disposed immediately above the cutter and injects ultra-high pressure water toward the center of the existing pile, and a casing that excavates into the ground so as to surround the existing pile while rotating the casing to a predetermined depth of the existing pile. A digging device, an ultra-high pressure water supply pipe laid along the outer wall of the casing, an ultra-high pressure water generator for supplying ultra-high pressure water to the pipe, and an ultra-high pressure water distribution device on the upper casing outer wall While cutting and pulling the casing around the existing pile using an existing pile cutting / pulling device provided with ultra-high pressure water, only the nozzles spraying below the casing are distributed during excavation. When the shing has been excavated to the specified depth, the excavation is stopped, and the high-pressure water is distributed only to the nozzle that injects the ultra-high-pressure water toward the center of the existing pile while rotating the casing. A method of cutting and pulling out existing piles, in which the existing piles are cut off and then pulled out, the lower part of the existing piles is left as it is, and the casing is pulled out and collected.
空洞部に充填材を充填してからケーシングを引き抜き回
収することを特徴とする請求項１又は２に記載の既設杭
の切断・引き抜き工法。3. The cutting / pulling-out of an existing pile according to claim 1 or 2, wherein the casing is pulled out and collected after filling the cavity after the cut-out existing pile is pulled out with a filler. Construction method.
引き上げた段階で、その上部を短く切断して撤去する工
程を繰り返しながら、杭引き抜きを行うことを特徴とす
る請求項１〜３のいずれか１項に記載の既設杭の切断・
引き抜き工法。4. The method according to claim 1, wherein when the upper part of the cut existing pile is slightly lifted to the ground, the pile is pulled out while repeating a step of cutting the upper part short and removing it. Cutting of existing piles described in any one of
Drawing method.
ものであることを特徴とする請求項１〜４のいずれか１
項に記載の既設杭の切断・引き抜き工法。5. The method according to claim 1, wherein the ultra-high pressure water is obtained by mixing an abrasive.
The method of cutting and pulling out existing piles described in section.
の下端部に取り付けられた掘削用カッターと、該カッタ
ーの直上に配設された既設杭中心方向に超高圧水を噴射
するノズルと、前記ケーシングを既設杭の所定深度まで
回転しながら、既設杭を囲繞するようにして地中に掘進
させるケーシング掘進装置と、前記ケーシング外壁に添
わせて配管された超高圧水送給用パイプと、同パイプに
超高圧水を供給するための超高圧水発生装置を備えてな
る既設杭の切断・引き抜き装置であって、前記ケーシン
グ掘進装置が、前記ケーシングを既設杭の周囲で回動さ
せながら掘進し、所定深度まで掘進したところで掘進を
停止し、ケーシングを回動させながら前記ノズルから超
高圧水を既設杭中心方向へ噴射して既設杭を切り離し可
能な深さ部位まで切削するように構成したものであるこ
とを特徴とする既設杭の切断・引き抜き装置。6. A casing having a diameter larger than the outer diameter of an existing pile, a cutter for excavation attached to a lower end thereof, and a nozzle which is disposed immediately above the cutter and injects ultra-high pressure water toward a center of the existing pile. While rotating the casing to a predetermined depth of the existing pile, a casing digging device that digs into the ground so as to surround the existing pile, and an ultra-high pressure water supply pipe that is piped along the casing outer wall, An existing pile cutting / pulling device comprising an ultra-high pressure water generator for supplying ultra-high pressure water to the pipe, wherein the casing excavating device rotates the casing around the existing pile. When the excavation has been completed, the excavation is stopped when the excavation is completed to a predetermined depth, and the high-pressure water is sprayed from the nozzle toward the center of the existing pile while rotating the casing to cut the existing pile to a depth where the existing pile can be separated. An existing pile cutting / pulling device characterized in that it is configured to cut.
の下端部に取り付けられた掘削用カッターと、同様にケ
ーシング下端部に配設された超高圧水をケーシング下方
に噴射するノズルと、前記カッターの直上に配設された
既設杭中心方向に超高圧水を噴射するノズルと、前記ケ
ーシングを既設杭の所定深度まで回転しながら、既設杭
を囲繞するようにして地中に掘進させるケーシング掘進
装置と、前記ケーシング外壁に添わせて配管された超高
圧水送給用パイプと、同パイプに超高圧水を供給するた
めの超高圧水発生装置と、上部ケーシング外壁に超高圧
水分配装置を備えてなる既設杭の切断・引き抜き装置で
あって、前記超高圧水分配装置が、前記ケーシングを既
設杭の周囲で回動させながら、掘進中はケーシング下方
に噴射するノズルのみに超高圧水を分配し、ケーシング
を所定深度まで掘進させたところで掘進を停止し、ケー
シングを回動させながら既設杭の切削を行うときは、中
心方向に超高圧水を噴射するノズルのみに超高圧水を分
配するように構成したものであることを特徴とする既設
杭の切断・引き抜き装置。7. A casing having a diameter larger than the existing pile outer diameter, a cutter for excavation attached to a lower end of the casing, and a nozzle for jetting ultra-high pressure water similarly disposed at a lower end of the casing to a lower part of the casing. A nozzle that is disposed immediately above the cutter and injects ultra-high pressure water toward the center of the existing pile, and a casing that excavates into the ground so as to surround the existing pile while rotating the casing to a predetermined depth of the existing pile. A digging device, an ultra-high pressure water supply pipe laid along the outer wall of the casing, an ultra-high pressure water generator for supplying ultra-high pressure water to the pipe, and an ultra-high pressure water distribution device on the upper casing outer wall An apparatus for cutting and pulling out an existing pile, comprising: the ultra-high pressure water distribution device, wherein the ultra-high pressure water distribution device rotates the casing around the existing pile, and discharges the nozzle downwardly during excavation. Distribute the ultra-high pressure water only, and when the casing is excavated to the specified depth, stop excavation and when cutting the existing pile while rotating the casing, use only the nozzle that sprays the ultra-high pressure water in the center direction. An existing pile cutting / pulling device characterized in that it is configured to distribute ultra-high pressure water.
引き上げた段階で、その上部を短く切断する既設引き上
げ杭切断装置を備えてなることを特徴とする請求項６又
は７に記載の既設杭の切断・引き抜き装置。8. The existing pile device according to claim 6, further comprising an existing lifting pile cutting device for cutting the upper portion of the existing pile slightly above the ground to slightly cut the upper portion. Pile cutting and pulling device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000329507A JP4450135B2 (en) | 2000-10-27 | 2000-10-27 | Cutting and drawing method and equipment for existing piles |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000329507A JP4450135B2 (en) | 2000-10-27 | 2000-10-27 | Cutting and drawing method and equipment for existing piles |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2002138475A true JP2002138475A (en) | 2002-05-14 |
| JP4450135B2 JP4450135B2 (en) | 2010-04-14 |
Family
ID=18806166
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000329507A Expired - Fee Related JP4450135B2 (en) | 2000-10-27 | 2000-10-27 | Cutting and drawing method and equipment for existing piles |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP4450135B2 (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004116020A (en) * | 2002-09-24 | 2004-04-15 | East Japan Railway Co | Removal method and drawing device for existing pile |
| JP2006028878A (en) * | 2004-07-15 | 2006-02-02 | Somagumi:Kk | Existing pile removing method and existing pile removing apparatus |
| JP2009065955A (en) * | 2007-08-17 | 2009-04-02 | Nishimura Seisaku Kk | Apparatus for cutting off lower end of noodle string |
| CN106978807A (en) * | 2017-03-10 | 2017-07-25 | 浙江大学城市学院 | Existing bridge pile pulling device and construction method are passed through by a kind of weak soil shield driving area |
| JP2021188378A (en) * | 2020-05-30 | 2021-12-13 | 株式会社マルシン | Pile extraction backfilling method |
| CN116856405A (en) * | 2023-08-29 | 2023-10-10 | 浙江华东岩土勘察设计研究院有限公司 | Marine self-elevating platform column type multilayer pile punching system |
-
2000
- 2000-10-27 JP JP2000329507A patent/JP4450135B2/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004116020A (en) * | 2002-09-24 | 2004-04-15 | East Japan Railway Co | Removal method and drawing device for existing pile |
| JP2006028878A (en) * | 2004-07-15 | 2006-02-02 | Somagumi:Kk | Existing pile removing method and existing pile removing apparatus |
| JP2009065955A (en) * | 2007-08-17 | 2009-04-02 | Nishimura Seisaku Kk | Apparatus for cutting off lower end of noodle string |
| CN106978807A (en) * | 2017-03-10 | 2017-07-25 | 浙江大学城市学院 | Existing bridge pile pulling device and construction method are passed through by a kind of weak soil shield driving area |
| JP2021188378A (en) * | 2020-05-30 | 2021-12-13 | 株式会社マルシン | Pile extraction backfilling method |
| CN116856405A (en) * | 2023-08-29 | 2023-10-10 | 浙江华东岩土勘察设计研究院有限公司 | Marine self-elevating platform column type multilayer pile punching system |
| CN116856405B (en) * | 2023-08-29 | 2023-11-21 | 浙江华东岩土勘察设计研究院有限公司 | Marine self-elevating platform column type multilayer pile punching system |
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| Publication number | Publication date |
|---|---|
| JP4450135B2 (en) | 2010-04-14 |
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