JP2010065405A - Method and device for removing obstacle - Google Patents

Method and device for removing obstacle Download PDF

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JP2010065405A
JP2010065405A JP2008230671A JP2008230671A JP2010065405A JP 2010065405 A JP2010065405 A JP 2010065405A JP 2008230671 A JP2008230671 A JP 2008230671A JP 2008230671 A JP2008230671 A JP 2008230671A JP 2010065405 A JP2010065405 A JP 2010065405A
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casing
guide rail
obstacle
cutter
lowered
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JP4669538B2 (en
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Fumio Kaneko
文男 金子
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KANEKEN KK
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a method and a device for removing an existing pile and the other obstacles remaining in the ground which can reasonably perform the construction by efficiently and reliably excavating by a hammer grab and cutting with a cutter effectively utilizing a casing. <P>SOLUTION: A guide rail 4 is longitudinally attached to the inside of the all-around rotating casing 1 with an excavating blade 2 at the front end. The casing 1 is rotated and pressed into the ground. Along the guide rail 4, the hammer grab 7 is lowered into the casing 1, and the excavation is performed. After the side of an underground obstacle 13 is excavated, the hammer grab 7 is raised, the cutter 10 is lowered into the casing 1 along the guide rail 4, and the casing 1 is rotated to cut the obstacle 13. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

本発明は、既存杭やその他の地中に残置された障害物を撤去する工法およびそれに使用する装置に関するものである。   The present invention relates to a construction method for removing existing piles and other obstacles left in the ground, and an apparatus used therefor.

都市部の再開発や建築物の建て替え等においては、既存の建築物の地上部分の解体と共に、この建築物を支持していた既設地中杭や地下部分の撤去を行う。   In redevelopment of urban areas and rebuilding of buildings, the ground parts of existing buildings are dismantled and the existing underground piles and underground parts that supported the buildings are removed.

既設地中杭を例にとると、長期間にわたって地中に埋設された既設地中杭は、地盤に固着安定化されているため、撤去するにあたっては、その既設地中杭と杭周地盤との間の摩擦抵抗を減少させる必要がある。   Taking an existing underground pile as an example, the existing underground pile buried in the ground for a long period of time is firmly fixed to the ground, so when removing the existing underground pile, It is necessary to reduce the frictional resistance during

既設地中杭の撤去方法として、下記非特許文献1に示すように、ケーシング先端にカッタービットを取り付け全周回転により地中障害物を切削撤去する地中障害撤去工法(MRO工法)が知られている。
“三菱建設株式会社技術研究所”、[online]、平成14年1月、社団法人 電力土木技術協会、[平成20年7月9日検索]、インターネット<URL:http://www.jepoc.or.jp/pub/1401/1401-34.htm>
As an existing underground pile removal method, as shown in Non-Patent Document 1 below, an underground removal method (MRO method) is known in which a cutter bit is attached to the tip of the casing and an underground obstacle is cut and removed by rotating all around. ing.
“Mitsubishi Construction Co., Ltd. Technical Research Institute”, [online], January 2002, Japan Electric Power Engineering Association, [searched July 9, 2008], Internet <URL: http: //www.jepoc. or.jp/pub/1401/1401-34.htm>

この非特許文献1に提案された地中障害撤去工法を用いた既設地中杭の撤去方法は、既設地中杭の外周を取り囲むように配設したケーシング(チューブ)を地中に掘進させながらケーシングチューブ内の既設地中杭の周辺の土砂をハンマーグラブにて排土することによって、既設地中杭と杭周地盤との間の摩擦抵抗を減少させた後に、既設地中杭を地上に引き上げる方法であると記載されている。   The removal method of an existing underground pile using the underground fault removal method proposed in Non-Patent Document 1 is that the casing (tube) disposed so as to surround the outer periphery of the existing underground pile is dug into the ground. After removing the soil around the existing underground pile in the casing tube with a hammer grab, the frictional resistance between the existing underground pile and the pile surrounding ground is reduced, and then the existing underground pile is put on the ground. It is described as a method of raising.

また、下記特許文献1は前記非特許文献1の問題点を解決するものとして提案されたものである。すなわち、非特許文献1の既設地中杭の撤去方法は、既設地中杭の撤去に多くの日数と手間とを要するとして、圧力流体噴射口から噴射させた圧力流体によって杭周地盤が流動化あるいは泥状化することで低コスト化かつ容易化を実現しよとするものである。
特開2007−332559号公報
The following Patent Document 1 has been proposed as a solution to the problems of Non-Patent Document 1. That is, the removal method of the existing underground pile of Non-Patent Document 1 requires that many days and labor are required for removing the existing underground pile, and the pile ground is fluidized by the pressure fluid injected from the pressure fluid injection port. Or it is going to implement | achieve cost reduction and easy by making it muddy.
JP 2007-332559 A

特許文献1は、地中に埋設されたコンクリート杭の杭径よりも大径な内径を有する掘削刃物を下端に備え、圧力流体噴射口を先端部分に設けたケーシングチューブを、そのコンクリート杭の外周を取り囲むように全周回転式掘削機械にセットし、圧力流体噴射口から高圧水を噴射させながら杭周地盤を掘削し、そのコンクリート杭を地上に引き上げるものである。   Patent Document 1 discloses a casing tube having a drilling blade having an inner diameter larger than a pile diameter of a concrete pile buried in the ground at a lower end and a pressure fluid injection port provided at a tip portion of the outer periphery of the concrete pile. Is set in an all-round rotary excavating machine so as to surround the pile, excavating the pile ground while injecting high-pressure water from the pressure fluid injection port, and lifting the concrete pile to the ground.

前記非特許文献1の地中障害撤去工法(MRO工法)では、特許文献1の図13等にあるように、ハンマーグラブはクローラクレーンから吊下されて吊り降ろされるだけであり、ケーシングチューブ内の既設地中杭の周辺の土砂をそのハンマーグラブを用いて排土するのも位置決めその他で不安定である。   In the underground fault removal method (MRO method) of Non-Patent Document 1, as shown in FIG. 13 of Patent Document 1, the hammer grab is only suspended from the crawler crane and suspended. It is unstable due to positioning and other reasons to remove the soil around the existing underground pile using the hammer grab.

また既設地中杭の切断はケーシングチューブで鉛直方向に切断するものであり長いものを長い方向に切断するので、効率がきわめて悪い。   Moreover, the cutting of the existing underground pile is cut in the vertical direction by the casing tube, and the long one is cut in the long direction, so that the efficiency is extremely poor.

特許文献1は、コンクリート杭の破砕としては、地上のクローラクレーンから吊下された回転バケットを吊り降ろし、その回転バケットを用いてコンクリート杭を短尺にねじ切るもので、このような回転バケットを別途吊り降ろして作業しなければならないのは、面倒で手間のかかる作業となる。   Patent Document 1 discloses a method of crushing a concrete pile by hanging a rotating bucket suspended from a crawler crane on the ground and threading the concrete pile to a short length using the rotating bucket. The work that must be suspended is a cumbersome and time-consuming work.

本発明の目的は前記従来例の不都合を解消し、ケーシングを有効に活用して、ハンマーグラブでの掘削と、カッターでの切断を効率的かつ確実に行うことにより、合理的な施工が可能となる障害物撤去工法および装置を提供することにある。   The object of the present invention is to eliminate the inconvenience of the conventional example, and to efficiently use the casing, and to efficiently and reliably perform excavation with a hammer grab and cutting with a cutter, thereby enabling rational construction. It is to provide an obstruction removal method and apparatus.

本発明は前記目的を達成するため、障害物撤去工法としては、第1に、先端に掘削刃を有する全周回転ケーシングの内側に長さ方向にガイドレールを取り付け、ケーシングを回転させて地中に圧入し、ガイドレールに沿ってハンマーグラブをケーシング内に下降させて掘削を行い、地中障害物の側方を掘削後、ハンマーグラブを引上げ、同じガイドレールに沿ってカッターをケーシング内に下降させ、ケーシングを回転させて地中障害物を切断することを要旨とするものである。   In order to achieve the above object, the present invention, as an obstacle removal method, firstly, a guide rail is attached in the length direction inside an all-round rotating casing having an excavating blade at the tip, and the casing is rotated to enter the ground. Press to insert the hammer grab along the guide rail into the casing for excavation. After excavating the side of the underground obstacle, pull up the hammer grab and lower the cutter into the casing along the same guide rail. The gist is to cut the underground obstacle by rotating the casing.

第2に、ガイドレールは下端にストッパーを設け、ハンマーグラブおよびカッターはこのストッパーに当接するまで、下降させること、第3に、カッターは、ケーシングの内周に対応する大円弧辺に対して内側に湾曲する小円弧辺により略二等辺三角形状の水平板体によるものであり、小円弧辺の結合角部近傍に刃を形成してなること、第4に、カッターは、突起長さの異なるものを複数準備し、突起長さの短いものから順次長いものへ変更して複数回下降させて、地中障害物を切断することを要旨とするものである。   Secondly, the guide rail is provided with a stopper at the lower end, and the hammer grab and the cutter are lowered until they come into contact with the stopper, and thirdly, the cutter is inside the large arc side corresponding to the inner circumference of the casing. Is formed by a horizontal plate having a substantially isosceles triangle shape with a small arc side curved in a straight line, and a blade is formed in the vicinity of the coupling corner of the small arc side. Fourth, the cutter has a different projection length. The gist is to prepare a plurality of objects, change the length of the protrusions from the short one to the long ones, and lower the plurality of times to cut the underground obstacle.

障害物撤去装置としては、先端に掘削刃を有し、内側に長さ方向にガイドレールを取り付けた全周回転可能なケーシングと、ガイドレール係合部を設け、この係合部によりケーシングのガイドレールに沿って下降可能なハンマーグラブと、ガイドレール係合部を設け、ケーシングの内周に対応する大円弧辺に対して内側に湾曲する小円弧辺により略二等辺三角形状の水平板体によるものであり、小円弧辺の結合角部近傍に刃を形成してなるカッターとからなることを要旨とするものである。   As the obstacle removing device, a casing having a digging blade at the tip and having a guide rail mounted in the length direction on the inside thereof and a guide rail engaging portion are provided, and a guide for the casing is provided by the engaging portion. A hammer grab that can be lowered along the rail and a guide rail engaging portion are provided, and a horizontal plate body having a substantially isosceles triangle shape by a small arc side curved inward with respect to a large arc side corresponding to the inner circumference of the casing. The gist of the invention is that it comprises a cutter having a blade formed in the vicinity of a connecting corner of a small arc side.

請求項1および請求項5記載の本発明によれば、ます、先端に掘削刃を有する全周回転ケーシングを地中に挿入し、ついで、ガイドレールに沿ってハンマーグラブをケーシング内に下降させて掘削を行うことができるので、ガイドレールを介してハンマーグラブをケーシング内側に取り付けた状態で、ハンマーグラブにより安定した掘削を行うことができる。また、カッターをケーシング内に下降させるのも同じガイドレールを用いることができ、カッターでの地中障害物の切断はケーシングを回転させることで、ガイドレールを介して行うことができる。   According to the first and fifth aspects of the present invention, an all-round rotating casing having an excavating blade at the tip is inserted into the ground, and then the hammer grab is lowered into the casing along the guide rail. Since excavation can be performed, stable excavation can be performed by the hammer grab with the hammer grab attached to the inside of the casing via the guide rail. The same guide rail can be used to lower the cutter into the casing, and the cutting of the underground obstacle with the cutter can be performed via the guide rail by rotating the casing.

請求項2記載の本発明によれば、前記作用に加えて、ガイドレールは下端にストッパーを設けたので、ハンマーグラブおよびカッターは下降をこのストッパーに当接するまでおこなうことで下降位置の位置決めが簡単にできる。   According to the second aspect of the present invention, in addition to the above action, the guide rail is provided with a stopper at the lower end, so that the hammer grab and the cutter can be lowered until they come into contact with the stopper, thereby easily positioning the lowered position. Can be.

請求項3記載の本発明によれば、ケーシング内に設置するものとして、しかも、ケーシングの正逆いずれの回転でも切断可能なものとして、合理的な形状のカッターとなるものである。   According to the third aspect of the present invention, it is possible to provide a cutter having a reasonable shape as being installed in the casing and capable of being cut by either forward or reverse rotation of the casing.

請求項4記載の本発明によれば、カッターは、突起長さの異なるものを複数準備し、突起長さの短いものから順次長いものへ変更して複数回下降させて、地中障害物を切断することで、確実に切断を行うことができる。   According to the fourth aspect of the present invention, a plurality of cutters having different projection lengths are prepared, and the cutter is changed from a short projection length to a long one and lowered several times, and an underground obstacle is removed. By cutting, it can cut reliably.

以上述べたように本発明の障害物撤去工法および装置は、ケーシングを有効に活用して、ハンマーグラブでの掘削と、カッターでの切断を効率的かつ確実に行うことにより、合理的な施工が可能となるものである。   As described above, the obstacle removal method and apparatus according to the present invention makes efficient construction by efficiently and reliably performing excavation with a hammer grab and cutting with a cutter by effectively utilizing the casing. It is possible.

以下、図面について本発明の実施の形態を詳細に説明する。図1は本発明の障害物撤去工法の掘削工程を示す縦断正面図、図2は同上横断平面図で、図中1は図7にも示すように先端周方向に間隔を存して掘削刃2を有する全周回転ケーシング(チューブ)である。   Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a longitudinal front view showing the excavation process of the obstacle removing method of the present invention, FIG. 2 is a cross-sectional plan view of the same, and 1 in FIG. 7 is an excavating blade with an interval in the circumferential direction of the tip as shown in FIG. 2 is an all-around rotating casing (tube).

ケーシング(チューブ)1の駆動は、図6に示すように全周回転式掘削機械3にセットして行い、この全周回転式掘削機械3を用いて円周方向に全周回転させながら地盤に回転圧入して掘削する。   The casing (tube) 1 is driven by being set in an all-round rotary excavating machine 3 as shown in FIG. 6, and is rotated around the circumference in the circumferential direction using the all-round rotary excavating machine 3. Drill with rotary press-fitting.

本発明はケーシング1の内側面でこのケーシング1の長さ方向に沿ってガイドレール4を取り付けた。図7にも示すように、このガイドレール4は鉄道の軌道で用いるレールと同じもの、若しくは同じような形状のものでよい。   In the present invention, the guide rail 4 is attached along the length direction of the casing 1 on the inner surface of the casing 1. As shown in FIG. 7, the guide rail 4 may be the same as the rail used on the railroad track, or the same shape.

ガイドレール4の下端には鉄板の係止片などによるストッパー5を形成し、このガイドレール4に溝をもって係合する部材が下端から抜け出ないようにする。ストッパー5の位置はケーシング1の内面下端より50cm程度上方である。   A stopper 5 made of an iron plate locking piece or the like is formed at the lower end of the guide rail 4 so that a member engaged with the guide rail 4 with a groove does not come out from the lower end. The position of the stopper 5 is about 50 cm above the lower end of the inner surface of the casing 1.

図中6はケーシング1の内側面に設けるインナーカッターである。   In the figure, 6 is an inner cutter provided on the inner surface of the casing 1.

図中7はハンマーグラブであるが、このハンマーグラブ7の背後で上下方向に図8に示すような係合溝9を形成したガイドレール係合部として細長のガイド8を取り付ける。   In the figure, reference numeral 7 denotes a hammer grab. An elongated guide 8 is attached as a guide rail engaging portion in which an engaging groove 9 as shown in FIG. 8 is formed in the vertical direction behind the hammer grab 7.

図3は本発明の障害物撤去工法の掘削工程を示す縦断正面図、図4は同上横断平面図で、図中10はガイドレール4の係合部としての係合溝11を形成してガイドレール4に沿ってケーシング1内を下降可能なカッターで、このカッター10は、ケーシング1の内周に対応する大円弧辺10aに対して内側に湾曲する小円弧辺10bにより略二等辺三角形状(エイのような形状)の水平板体によるものであり、小円弧辺10b同士の結合角部近傍に刃12を形成してなる。この刃12は左右の小円弧辺10bに設けることで、左右に存在するものとなる。   FIG. 3 is a longitudinal front view showing an excavation process of the obstacle removing method of the present invention, FIG. 4 is a cross-sectional plan view of the same as above, and 10 in the figure is a guide formed with an engaging groove 11 as an engaging portion of the guide rail 4. The cutter 10 is a cutter that can be lowered in the casing 1 along the rail 4. The cutter 10 has a substantially isosceles triangular shape by a small arc side 10 b that curves inward with respect to a large arc side 10 a corresponding to the inner periphery of the casing 1. The blade 12 is formed in the vicinity of the connecting corner between the small arc sides 10b. The blades 12 exist on the left and right sides by being provided on the left and right small arc sides 10b.

なお、前記係合溝11は直接カッター10に設けてもよいが、前記図8に示すような係合溝9を形成したガイドレール係合部として細長のガイド8をカッター10に立ち上げるようにしてもよい。   Although the engaging groove 11 may be provided directly in the cutter 10, the elongated guide 8 is raised on the cutter 10 as a guide rail engaging portion in which the engaging groove 9 as shown in FIG. May be.

このような細長のガイド8を介在させてガイドレール4に対してカッター10を昇降自在に係合させることで、カッター10はガイドレール4に必要長さを確保してしっかりと係合でき、ケーシング1の回転とともにカッター10を動かして切断作用を行わせる場合に好適なものとなる。   By engaging the cutter 10 with the guide rail 4 so as to be able to move up and down with the elongate guide 8 interposed therebetween, the cutter 10 can be securely engaged with the guide rail 4 with a necessary length secured. This is suitable when the cutter 10 is moved together with the rotation of 1 to perform the cutting action.

図示は省略するが、カッター10は、大きさの異なるもの、すなわち、突起長さの異なるものを複数準備しておく。   Although illustration is omitted, a plurality of cutters 10 having different sizes, that is, different projection lengths are prepared.

以上のように本発明の障害物撤去装置としては、先端に掘削刃2を有し、内側に長さ方向にガイドレール4を取り付けた全周回転ケーシング1と、ガイドレール4の係合部を設け、この係合部によりケーシング1のガイドレール4に沿って下降可能なハンマーグラブ7と、ガイドレール4への係合部を設け、ケーシングの内周に対応する大円弧辺10aに対して内側に湾曲する小円弧辺10bにより略二等辺三角形状の水平板体によるものであり、小円弧辺の結合角部近傍に刃11を形成してなるカッター10とからなる。   As described above, the obstacle removing device according to the present invention includes the entire rotating casing 1 having the excavating blade 2 at the tip and the guide rail 4 attached to the inside in the length direction, and the engaging portion of the guide rail 4. A hammer grab 7 that can be lowered along the guide rail 4 of the casing 1 by this engaging portion and an engaging portion to the guide rail 4 are provided, and the inner side with respect to the large arc side 10a corresponding to the inner periphery of the casing It is formed of a horizontal plate body having a substantially isosceles triangle shape by a small arc side 10b that is curved in a straight line, and includes a cutter 10 in which a blade 11 is formed in the vicinity of a coupling corner of the small arc side.

次に、この本発明の障害物撤去装置を用いて行う本発明の障害物撤去方法について説明する。   Next, the obstacle removal method of the present invention performed using the obstacle removal device of the present invention will be described.

図1、図2に示すように、図中13が既設地中杭その他の障害物であるとして、機械据付工程で全周回転式掘削機械3にセットされたケーシング1を全周回転式掘削機械3を用いて円周方向に全周回転させながら地盤に回転圧入する。   As shown in FIGS. 1 and 2, assuming that 13 is an existing underground pile or other obstacle, the casing 1 set in the all-round rotary excavating machine 3 in the machine installation process is used as the all-round rotary excavating machine. 3 and press-fitting into the ground while rotating all around in the circumferential direction.

掘削刃2を下端に備えたケーシング1は、このケーシング1を地中に掘進させた時にこのケーシング1の内壁と障害物13との間にハンマーグラブ7を挿入する空間が確保されるように全周回転式掘削機械3にセットする。   The casing 1 provided with the excavating blade 2 at the lower end has a space for inserting the hammer grab 7 between the inner wall of the casing 1 and the obstacle 13 when the casing 1 is dug into the ground. Set on the circumferential rotary excavating machine 3.

ケーシング1の圧入とともに通常のハンマーグラブを吊り降ろして排土を行い、掘削を行う。   Along with the press-fitting of the casing 1, a normal hammer grab is suspended to perform soil removal and excavation.

掘削が進むにつれて、下端に掘削刃2を備えたケーシング1の上部に他のケーシングチューブを順次継ぎ足して、掘削坑の内壁の崩落を防止しながら掘削を続ける。   As the excavation progresses, another casing tube is sequentially added to the upper portion of the casing 1 having the excavating blade 2 at the lower end to continue excavation while preventing the collapse of the inner wall of the excavation mine.

地中の障害物13に遭遇したならば、ハンマーグラブで掘削を止め、回転圧入れだけで、障害物13の外周を取り囲むようにケーシング1を地中に掘進させる。   If an obstacle 13 in the ground is encountered, the excavation is stopped with a hammer grab, and the casing 1 is dug into the ground so as to surround the outer periphery of the obstacle 13 only by rotary press-fitting.

このようにケーシング1の先端部分を先行させたならば、ガイドレール4に沿って小型のハンマーグラブ7をケーシング1内に下降させて掘削を行い、障害物13の側方を掘削する。なお、障害物13の側方でハンマーグラブ7の位置を変更するにはケーシング1を回転させればよい。   When the tip of the casing 1 is advanced in this way, the small hammer grab 7 is lowered into the casing 1 along the guide rail 4 to perform excavation, and the side of the obstacle 13 is excavated. In order to change the position of the hammer grab 7 on the side of the obstacle 13, the casing 1 may be rotated.

掘削後、ハンマーグラブ7をガイドレール4に沿って引上げ、同じガイドレール4に沿ってカッター10をケーシング1内に下降させる。カッター10は前記ハンマーグラブ7での掘削した空所に入り込み、ガイドレール4の下端のストッパー5の所でとまる。   After excavation, the hammer grab 7 is pulled up along the guide rail 4, and the cutter 10 is lowered into the casing 1 along the same guide rail 4. The cutter 10 enters the space excavated by the hammer grab 7 and stops at the stopper 5 at the lower end of the guide rail 4.

この状態でケーシング1を回転させて図5に示すように障害物13を切断する。   In this state, the casing 1 is rotated to cut the obstacle 13 as shown in FIG.

前記のようにカッター10は、突起長さの異なるものを複数準備しているので、突起長さの短いものから順次長いものへ変更して複数回下降させて、地中の障害物13を切断する。   As described above, the cutter 10 is prepared with a plurality of protrusions having different protrusion lengths, so that the protrusions are changed from short ones to long ones and lowered several times to cut the obstacle 13 in the ground. To do.

高さ1m程度に切断された切断片は通常のハンマーグラブ7等で引き上げる。   The cut piece cut to about 1 m in height is pulled up with a normal hammer grab 7 or the like.

その後、再度ケーシング1の回転圧入にもどり、障害物13が無くなるまで、複数回繰り返す。   Then, it returns to the rotation press fit of the casing 1 again, and repeats several times until the obstacle 13 is lost.

本発明の障害物撤去工法の掘削工程を示す縦断正面図である。It is a vertical front view which shows the excavation process of the obstruction removal construction method of this invention. 本発明の障害物撤去工法の掘削工程を示す横断平面図である。It is a cross-sectional top view which shows the excavation process of the obstruction removal method of this invention. 本発明の障害物撤去工法の掘削工程を示す縦断正面図である。It is a vertical front view which shows the excavation process of the obstruction removal construction method of this invention. 本発明の障害物撤去工法の掘削工程を示す横断平面図である。It is a cross-sectional top view which shows the excavation process of the obstruction removal method of this invention. 本発明の障害物撤去工法のカターでの切断を示す横断平面図であるIt is a cross-sectional top view which shows the cutting | disconnection with the cutter of the obstruction removal construction method of this invention 全周回転式掘削機械の正面図である。It is a front view of an all-around rotary excavation machine. ケーシングの斜視図である。It is a perspective view of a casing. ケーシング内のガイドレールの斜視図である。It is a perspective view of the guide rail in a casing. ガイドレールのガイドの斜視図である。It is a perspective view of the guide of a guide rail.

符号の説明Explanation of symbols

1…ケーシング 2…掘削刃
3…全周回転式掘削機械 4…ガイドレール
5…ストッパー 6…インナーカッター
7…ハンマーグラブ 8…ガイド
9…係合溝 10…カッター
10a…大円弧辺 10b…小円弧辺
11…係合溝 12…刃
13…障害物
DESCRIPTION OF SYMBOLS 1 ... Casing 2 ... Excavation blade 3 ... Circumferential rotation type excavation machine 4 ... Guide rail 5 ... Stopper 6 ... Inner cutter 7 ... Hammer grab 8 ... Guide 9 ... Engaging groove 10 ... Cutter 10a ... Large arc side 10b ... Small arc Side 11 ... engagement groove 12 ... blade 13 ... obstacle

Claims (5)

先端に掘削刃を有する全周回転ケーシングの内側に長さ方向にガイドレールを取り付け、ケーシングを回転させて地中に圧入し、ガイドレールに沿ってハンマーグラブをケーシング内に下降させて掘削を行い、地中の障害物の側方を掘削後、ハンマーグラブを引上げ、同じガイドレールに沿ってカッターをケーシング内に下降させ、ケーシングを回転させて障害物を切断することを特徴とする障害物撤去工法。   A guide rail is attached in the length direction inside the all-round rotating casing with a cutting blade at the tip, and the casing is rotated to press fit into the ground, and the hammer grab is lowered into the casing along the guide rail for excavation. After excavating the side of the obstacle in the ground, the hammer grab is pulled up, the cutter is lowered into the casing along the same guide rail, the obstacle is removed by rotating the casing and cutting the obstacle Construction method. ガイドレールは下端にストッパーを設け、ハンマーグラブおよびカッターはこのストッパーに当接するまで、下降させる請求項1記載の障害物撤去工法。   The obstacle removal method according to claim 1, wherein the guide rail is provided with a stopper at a lower end, and the hammer grab and the cutter are lowered until they abut against the stopper. カッターは、ケーシングの内周に対応する大円弧辺に対して内側に湾曲する小円弧辺により略二等辺三角形状の水平板体によるものであり、小円弧辺の結合角部近傍に刃を形成してなる請求項1または請求項2記載の障害物撤去工法。   The cutter is a horizontal plate with a substantially isosceles triangle shape with a small arc side curved inward with respect to the large arc side corresponding to the inner circumference of the casing, and a blade is formed in the vicinity of the connecting corner of the small arc side. The obstruction removal construction method of Claim 1 or Claim 2 formed. カッターは、突起長さの異なるものを複数準備し、突起長さの短いものから順次長いものへ変更して複数回下降させて、地中障害物を切断する請求項1ないし請求項3のいずれかに記載の障害物撤去工法。   4. The cutter according to any one of claims 1 to 3, wherein a plurality of cutters having different projection lengths are prepared, the projections are changed from short projection lengths to long ones, and lowered several times to cut underground obstacles. Obstacle removal method described in Crab. 先端に掘削刃を有し、内側に長さ方向にガイドレールを取り付けた全周回転可能なケーシングと、ガイドレール係合部を設け、この係合部によりケーシングのガイドレールに沿って下降可能なハンマーグラブと、ガイドレール係合部を設け、ケーシングの内周に対応する大円弧辺に対して内側に湾曲する小円弧辺により略二等辺三角形状の水平板体によるものであり、小円弧辺の結合角部近傍に刃を形成してなるカッターとからなることを特徴とする障害物撤去装置。   A casing that has an excavating blade at the tip and has a guide rail in the lengthwise direction and that can rotate around the circumference, and a guide rail engaging portion are provided, and the engaging portion can be lowered along the guide rail of the casing. A hammer grab and a guide rail engaging part are provided, and the small arc side is a substantially isosceles triangular horizontal plate with a small arc side curved inward with respect to the large arc side corresponding to the inner circumference of the casing. An obstacle removing device comprising: a cutter formed with a blade in the vicinity of the joint corner of the.
JP2008230671A 2008-09-09 2008-09-09 Obstacle removal method and equipment Expired - Fee Related JP4669538B2 (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010242431A (en) * 2009-04-09 2010-10-28 Kaneken:Kk Earth removal device of casing for obstacle removal method
JP2010242432A (en) * 2009-04-09 2010-10-28 Kaneken:Kk Casing for obstacle removal method
JP2021113409A (en) * 2020-01-16 2021-08-05 鹿島建設株式会社 Open shield machine, and tunnel construction method

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003293369A (en) * 2002-04-03 2003-10-15 Kyoushin:Kk Construction method and device for removing existing pile

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003293369A (en) * 2002-04-03 2003-10-15 Kyoushin:Kk Construction method and device for removing existing pile

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010242431A (en) * 2009-04-09 2010-10-28 Kaneken:Kk Earth removal device of casing for obstacle removal method
JP2010242432A (en) * 2009-04-09 2010-10-28 Kaneken:Kk Casing for obstacle removal method
JP2021113409A (en) * 2020-01-16 2021-08-05 鹿島建設株式会社 Open shield machine, and tunnel construction method
JP7303756B2 (en) 2020-01-16 2023-07-05 鹿島建設株式会社 Open shield machine and tunnel construction method

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