JP2003321988A - Excavation method and excavator for shaft by earth auger - Google Patents

Excavation method and excavator for shaft by earth auger

Info

Publication number
JP2003321988A
JP2003321988A JP2002130422A JP2002130422A JP2003321988A JP 2003321988 A JP2003321988 A JP 2003321988A JP 2002130422 A JP2002130422 A JP 2002130422A JP 2002130422 A JP2002130422 A JP 2002130422A JP 2003321988 A JP2003321988 A JP 2003321988A
Authority
JP
Japan
Prior art keywords
telescopic arm
ground
earth
earth auger
auger
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
Application number
JP2002130422A
Other languages
Japanese (ja)
Other versions
JP4000004B2 (en
Inventor
Kazuyuki Shimoide
和行 下出
Yuichi Hayase
雄一 早瀬
Hachiro Tsuji
八郎 辻
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
EITO KOGYO KK
Toenec Corp
Original Assignee
EITO KOGYO KK
Toenec Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by EITO KOGYO KK, Toenec Corp filed Critical EITO KOGYO KK
Priority to JP2002130422A priority Critical patent/JP4000004B2/en
Publication of JP2003321988A publication Critical patent/JP2003321988A/en
Application granted granted Critical
Publication of JP4000004B2 publication Critical patent/JP4000004B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Abstract

<P>PROBLEM TO BE SOLVED: To provide an excavation method for a shaft and an excavator used therefor capable of efficiently excavating a pit without relying on human-power work not only in the case the ground consists of an earth and sand layer, but also even in the case it consists of a soft rock layer. <P>SOLUTION: A base section 11 of a telescopic arm 10 is mounted on a boom 6 of a hydraulic shovel 1 placed on the ground, a large number of columnar holes 35 are excavated by an earth auger 20 vertically installed to the front end 12 of the telescopic arm 10 at predetermined intervals on part of the ground 34 within a range of a diameter of the pit 36, a clamshell is mounted on the front end of the telescopic arm 10, and the cutting-through of the ground between the holes 35 adjacent to each other, the scraping of earth and sand and the conveyance of the scraped earth and sand can be performed by the clamshell vertically driven by the telescopic arm 10. <P>COPYRIGHT: (C)2004,JPO

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【発明の属する技術分野】この発明は、鉄塔用の深礎基
礎や一般土木工事の連続基礎などの各種基礎を構築する
際の立坑の掘削工法およびそれに用いる掘削装置に関す
る。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shaft excavation method for constructing various foundations such as deep foundation foundations for steel towers and continuous foundations for general civil engineering work, and an excavator used for the method.

【0002】[0002]

【従来の技術】深礎基礎構築用の立坑の掘削時には、土
質に応じた所定の深さの立穴の掘削と、その掘削土砂の
搬出と、掘削壁面のライナによる補強とを繰返して掘進
めて行く掘削工法が、一般に採用されている。そして上
記の掘削工法において人力作業を減らすために機械装置
を利用した掘削法として、たとえばクラムシェルを地上
からワイヤにより吊下げて昇降させ、あるいは地上に設
置した油圧ショベルにより支持したテレスコピックアー
ムの先端部にクラムシェルを取付けて昇降させ、上記ク
ラムシェルにより穴底部を掘削後、クラムシェルを上昇
させて掘削土砂を地上へ搬出する方法が、従来採用され
ている。
2. Description of the Related Art When excavating a vertical shaft for building a deep foundation, excavation of a vertical hole having a predetermined depth according to the soil quality, removal of the excavated earth and sand, and reinforcement of the excavated wall surface with a liner are repeated. The excavating method is widely adopted. And as an excavation method using a mechanical device in order to reduce human labor in the above-mentioned excavation method, for example, a clamshell is hung from the ground with a wire and raised or lowered, or the tip of a telescopic arm supported by a hydraulic excavator installed on the ground. A method has been conventionally used in which a clam shell is attached to and lifted up, the hole bottom is excavated by the clam shell, and then the clam shell is raised to carry the excavated soil to the ground.

【0003】ところが上記のクラムシェルによる掘削
は、掘削対象地盤の土質が土砂層から成る場合には適用
できるが、地盤が軟岩層から成る場合は掘削は困難とな
り、従来のようなコールピックや削岩機を用いた人手に
よる掘削や、硬岩層の場合と同様な面倒な発破による掘
削法を採らざるを得なかった。
However, the excavation using the clam shell described above can be applied when the soil of the ground to be excavated is composed of a sand layer, but it is difficult to excavate when the ground is composed of a soft rock layer, and it is difficult to perform conventional call picking or cutting. There was no choice but to employ manual excavation using a rock machine, and the same digging method as the troublesome blasting used for hard rock formations.

【0004】[0004]

【発明が解決しようとする課題】この発明は上記従来の
問題点を解決しようとするもので、地盤の土質が土砂層
から成る場合だけでなく、軟岩層から成る場合でも、人
力作業によることなく能率よく立穴の掘削をおこなうこ
とができる立坑の掘削工法およびそれに用いる装置を提
供することを目的とする。
SUMMARY OF THE INVENTION The present invention is intended to solve the above-mentioned problems of the prior art. Not only when the soil is composed of a soil layer, but also when it is composed of a soft rock layer, it does not require manual labor. It is an object of the present invention to provide a method for excavating a vertical shaft that enables efficient excavation of a vertical hole and a device used for the method.

【0005】[0005]

【課題を解決するための手段】上記目的を達成するため
に請求項1記載のアースオーガによる立坑の掘削工法
は、所定の深さの立穴の掘削と、その掘削土砂の搬出
と、掘削壁面のライナによる補強とを繰返して掘進めて
行く立坑の掘削工法において、地上に配置された油圧シ
ョベルのブームに、テレスコピックアームの基部を取付
け、このテレスコピックアームの先端部に垂設したアー
スオーガにより、前記立穴の直径範囲内の地盤部分に所
定の間隔で多数本の円柱状の孔を掘削し、次に前記テレ
スコピックアームの先端部にクラムシェルを取付け、前
記テレスコピックアームにより昇降駆動される前記クラ
ムシェルによって隣合う前記各孔間の地盤の切崩しと土
砂の掻取りおよびこの掻取った土砂の搬出をおこなうこ
とを特徴とする。
In order to achieve the above object, a method of excavating a vertical shaft by an earth auger according to claim 1 is a method of excavating a vertical hole having a predetermined depth, carrying out the excavated earth and sand, and an excavated wall surface. In the excavation method of the vertical shaft where the reinforcement with the liner is repeatedly carried out, the base of the telescopic arm is attached to the boom of the hydraulic excavator placed on the ground, and the earth auger hung vertically at the tip of this telescopic arm, A large number of cylindrical holes are excavated at a predetermined interval in the ground portion within the diameter range of the vertical hole, and then a clam shell is attached to the tip of the telescopic arm, and the clam is vertically driven by the telescopic arm. It is characterized in that the shell breaks down the ground between the adjacent holes, scrapes off the soil, and carries out the scraped off soil.

【0006】請求項1記載の発明によれば、地盤が軟岩
層から成る場合でも、アースオーガにより地盤部分に円
柱状の孔を迅速容易に掘削できるとともに、この掘削す
る孔の間隔寸法を地盤の軟硬の程度に応じて選定するこ
とにより、孔掘削の後工程においてクラムシェルにより
各孔間の地盤部を確実に切崩して立穴の掘削をおこなう
ことができる。
According to the first aspect of the present invention, even if the ground is composed of a soft rock layer, the ground auger can be used to quickly and easily excavate a cylindrical hole in the ground portion, and the distance between the holes to be excavated can be made equal to that of the ground. By selecting according to the degree of softness, it is possible to surely cut the ground portion between the holes by the clam shell in the post-hole drilling process to drill the vertical holes.

【0007】また請求項2記載の掘削装置は、油圧ショ
ベルのブームに、テレスコピックアームの基部を取付
け、このテレスコピックアームの先端部にアースオーガ
の回転駆動機部を垂設し、この回転駆動機部の出力軸
に、交換自在な連結ロッドを介して、アースオーガのオ
ーガスクリューの基部を連結したことを特徴とする。
In the excavator according to the second aspect of the present invention, the base of the telescopic arm is attached to the boom of the hydraulic excavator, and the rotary drive unit of the earth auger is vertically installed at the tip of the telescopic arm. It is characterized in that the base portion of the auger screw of the earth auger is connected to the output shaft of the above through a replaceable connecting rod.

【0008】この発明の掘削工法において、地盤部分に
孔を掘削する掘削装置としては、油圧パワーショベルの
ブームに基部を取付けたテレスコピックアームの先端部
に、回転駆動機部の出力軸にオーガスクリューの基部を
直接連結した公知のアースオーガの前記回転駆動機部を
連結して用いることもできるが、上記の請求項2記載の
掘削装置を用いると、長尺の連結ロッドを用い、あるい
は複数本の連結ロッドを継足して用いることにより、オ
ーガスクリューの長さよりも深い孔を掘削できるので、
オーガスクリューの長さより深い立穴の掘削が可能とな
る。
In the excavation method of the present invention, as an excavation device for excavating a hole in the ground, a tip of a telescopic arm having a base attached to a boom of a hydraulic power shovel, and an auger screw attached to an output shaft of a rotary drive unit are used. The rotary drive unit of a known earth auger in which the base is directly connected can also be connected and used. However, when the excavating device according to claim 2 is used, a long connecting rod is used, or a plurality of connecting rods are used. By connecting and using the connecting rod, it is possible to drill holes deeper than the length of the auger screw,
It is possible to drill vertical holes that are deeper than the length of the auger screw.

【0009】[0009]

【発明の実施の形態】以下図1〜図5に示す一例によ
り、この発明を鉄塔用の深礎基礎の構築に用いる立坑の
掘削に適用した場合の実施の形態を説明する。図1にお
いて、1は油圧ショベルで、クローラ式の走行体2の上
に、油圧パワーユニット3および運転室4等をそなえた
旋回台5を旋回自在に支持し、旋回台5上にブーム6を
起伏自在に支持した周知の構成を有するものである。7
はブーム6起伏駆動用の油圧シリンダである。
BEST MODE FOR CARRYING OUT THE INVENTION An embodiment in which the present invention is applied to excavation of a shaft used for constructing a deep foundation for a steel tower will be described below with reference to one example shown in FIGS. In FIG. 1, reference numeral 1 denotes a hydraulic excavator, which supports a swivel base 5 having a hydraulic power unit 3 and a driver's cab 4 on a crawler-type traveling body 2 so that the swivel base 5 can be swung up and down. It has a well-known structure that is freely supported. 7
Is a hydraulic cylinder for driving the boom 6 up and down.

【0010】10は油圧により伸縮駆動されるテレスコ
ピックアーム(多段伸縮アーム)で、その基部11は油
圧ショベル1のブーム6に取付けられており、8はその
傾動駆動用の油圧シリンダである。20はテレスコピッ
クアーム10の先端部12に取付けたアースオーガで、
この例ではその油圧式の駆動機部21とオーガスクリュ
ー22との間に連結ロッド23を取付けて、その全長の
延長をはかっている。すなわち、図2に示すように、テ
レスコピックアーム10の先端部12に垂設された駆動
機部21の出力軸21aには、カップリング24を介し
て連結ロッド23の上端部が着脱可能にボルト締めさ
れ、この連結ロッド23の下端部は、オーガスクリュー
22の基部22aに、着脱可能にボルト締めされてい
る。21bは、駆動機部21とテレスコピックアーム1
0の先端部12とを着脱自在に連結する連結杆である。
Reference numeral 10 denotes a telescopic arm (multi-stage telescopic arm) which is driven to extend and retract by hydraulic pressure, a base portion 11 thereof is attached to a boom 6 of the hydraulic excavator 1, and 8 is a hydraulic cylinder for tilting the same. 20 is an earth auger attached to the tip 12 of the telescopic arm 10.
In this example, a connecting rod 23 is attached between the hydraulic drive unit 21 and the auger screw 22 to extend the entire length. That is, as shown in FIG. 2, the upper end of the connecting rod 23 is detachably bolted to the output shaft 21a of the drive unit 21 that is suspended from the distal end 12 of the telescopic arm 10 via a coupling 24. The lower end of the connecting rod 23 is detachably bolted to the base 22a of the auger screw 22. 21b is a drive unit 21 and a telescopic arm 1
It is a connecting rod for detachably connecting the end portion 12 of 0.

【0011】また図5は、上記のアースオーガ20に替
えて、クラムシェル25をテレスコピックアーム10の
先端部12に取付けた状態を示し、このクラムシェル2
5は、油圧式の操作シリンダ26によりバケットの開閉
をおこなう周知構造のものである。
FIG. 5 shows a state in which a clam shell 25 is attached to the tip portion 12 of the telescopic arm 10 in place of the earth auger 20.
Reference numeral 5 is a well-known structure in which a bucket is opened and closed by a hydraulic operation cylinder 26.

【0012】なおこのクラムシェル25およびアースオ
ーガ20の駆動用の油圧ホースが、油圧ショベル1の油
圧パワーユニット3部からブーム6,テレスコピックア
ーム10内を経て配管・付設されているが、その図示は
省略してある。
The hydraulic hose for driving the clam shell 25 and the earth auger 20 is piped / attached from the hydraulic power unit 3 part of the hydraulic excavator 1 through the boom 6 and the telescopic arm 10, but its illustration is omitted. I am doing it.

【0013】次に上記装置を用いた立坑の掘削法を説明
する。図1において31は立坑30の最上部に形成され
る柱体部、32はそれに続く躯体部であるが、この躯体
部32の上部と柱体部31は、その土質が一般に軟質の
表土ないしは土砂層であるので、軟質層掘削を最も能率
よく施工できる通常の掘削工法により、土質に応じた所
定の深さの立穴の掘削と掘削土砂の搬出とライナ33に
よる掘削壁面の補強をおこなう。この掘削工法として
は、ブーム6の先端に図示しないアームを介してバケッ
トを取付けた油圧ショベル1による掘削、あるいは図5
に示すテレスコピックアーム10に取付けたクラムシェ
ル25による掘削などの工法のうちから、施工現地にお
ける使用機材および土質に適したものを選択して実施す
ればよい。
Next, a method of excavating a vertical shaft using the above apparatus will be described. In FIG. 1, 31 is a pillar part formed on the uppermost part of the shaft 30, 32 is a skeleton part following it, and the upper part of the skeleton part 32 and the pillar part 31 are generally soft soil or sand. Since it is a layer, the normal excavation method that enables the most efficient execution of soft layer excavation is used to excavate vertical holes with a predetermined depth according to the soil type, to carry out excavated soil and to reinforce the excavated wall surface with the liner 33. This excavation method includes excavation by the hydraulic excavator 1 in which a bucket is attached to the tip of the boom 6 via an arm (not shown), or
From the construction methods such as excavation using the clam shell 25 attached to the telescopic arm 10 shown in FIG. 1, a method suitable for the equipment and soil quality used at the construction site may be selected and implemented.

【0014】躯体部32の上部の掘削が、図1および図
4(a)における地上よりの深さHまで進行して掘削地
盤に軟岩層が現れたら、図1に示すようにテレスコピッ
クアーム10の先端部12にアースオーガ20を取付
け、このアースオーガ20により穴底の地盤34部分
に、図3に示すように所定の間隔で多数本の円柱状の孔
35を掘削する。
When the excavation of the upper part of the skeleton 32 progresses to a depth H from the ground in FIGS. 1 and 4 (a) and a soft rock layer appears on the excavated ground, as shown in FIG. An earth auger 20 is attached to the tip portion 12, and a large number of cylindrical holes 35 are drilled at predetermined intervals in the ground 34 portion of the hole bottom by the earth auger 20 as shown in FIG.

【0015】この孔35は、図4(c)に示すライナ3
3取付前の立穴36の直径Dの範囲内(実際にはライナ
33とオーガスクリュー22との干渉を避けるため、ラ
イナ張設後の立坑直径dの範囲内)に、後述のクラムシ
ェル25による地盤の切崩しが確実におこなえるよう
に、地盤の土質に応じてその間隔を選定して掘削する。
また孔35の深さ、従って立穴36の深さhは、掘削後
の壁面の過度の崩落が生じないように、地盤の土質に応
じて選定する。そして上記のアースオーガ20による掘
削作業は、油圧ショベル1の運転室4におけるブーム6
の傾動、アースオーガ20の回転駆動、および要すれば
走行体2による移動等の各操作により、穴底部への作業
者の立入りを要することなく、迅速に能率よくおこなう
ことができる。
This hole 35 is provided in the liner 3 shown in FIG. 4 (c).
3 Within the range of the diameter D of the vertical hole 36 before mounting (actually, within the range of the vertical shaft diameter d after the liner is stretched to avoid interference between the liner 33 and the auger screw 22), the clamshell 25 to be described later is used. In order to ensure that the ground will be cut down, the intervals will be selected according to the soil quality of the ground for excavation.
Further, the depth of the hole 35, that is, the depth h of the upright hole 36 is selected according to the soil quality of the ground so as not to cause excessive collapse of the wall surface after excavation. The excavation work by the earth auger 20 is performed by the boom 6 in the operator's cab 4 of the hydraulic excavator 1.
Can be swiftly and efficiently performed without the need for an operator to enter the bottom of the hole by various operations such as the tilting of the hole, the rotational drive of the earth auger 20, and the movement of the traveling body 2 if necessary.

【0016】アースオーガ20による所定本数の孔35
の掘削が終了したら、アースオーガ20を地上部へ引上
げて、この代りに図5に示すようにクラムシェル25を
テレスコピックアーム10の先端部12に取付け、この
クラムシェル25を立坑30の穴底の地盤34部へと降
下させ、隣合う各孔35,35間およびこの孔35近傍
部の地盤を切崩す。そしてこの切崩した土砂および前工
程のアースオーガ23による掘削土砂を、クラムシェル
25により掻取り地上部へ上昇させて立坑30の外へ搬
出して、図4(b)に示す深さhの立掘穴37を形成さ
せる。
A predetermined number of holes 35 formed by the earth auger 20.
When the excavation of the above is completed, the earth auger 20 is pulled up to the ground portion, and instead, the clamshell 25 is attached to the tip portion 12 of the telescopic arm 10 as shown in FIG. It is lowered to the ground 34, and the ground between adjacent holes 35, 35 and the ground in the vicinity of this hole 35 is broken. Then, the crushed earth and sand and the earth and sand excavated by the earth auger 23 in the previous step are scraped by the clam shell 25 and moved up to the above-ground portion to be carried out of the vertical shaft 30 to a depth h shown in FIG. 4 (b). The pit 37 is formed.

【0017】そしてクラムシェル25による上記切崩
し、掻取り、搬出の各作業も、アースオーガ20の場合
と同様に油圧ショベル1の運転室4における操作によ
り、穴底部への作業者の立入りを要することなく、迅速
に能率よくおこなうことができる。またアースオーガ2
0駆動用とクラムシェル25駆動用に、油圧ショベル1
およびテレスコピックアーム10を共用して用いるの
で、施工現地における準備・使用機材は少なくて済むの
である。
As in the case of the earth auger 20, the clam shell 25 requires the operator to enter the bottom of the hole by operating the hydraulic excavator 1 in the cab 4 as in the case of the earth auger 20. It can be done quickly and efficiently without Also earth auger 2
1 hydraulic excavator for driving 0 and driving clamshell 25
Also, since the telescopic arm 10 is used in common, the amount of equipment required for preparation and use at the construction site can be reduced.

【0018】これによってアースオーガ20およびクラ
ムシェル25による掘削工程は完了するので、立掘穴3
7の壁面38部に対して、コールピックを用いた人力作
業や、削岩機やカッタを装備した図示しない掘削装置を
立掘穴37内に搬入しておこなう機械掘削などにより、
当り取りあるいは仕上掘りをおこない、立穴36を形成
する。そしてこの壁面39部にライナ33を常法により
取付けたのち、上記各工程を繰返すことによりさらに地
盤を掘進め、要すれば人力あるいは別の機械掘削装置等
により拡底掘削をおこなって、所定深さおよび形状の立
坑30を形成させる。
With this, the excavation process by the earth auger 20 and the clam shell 25 is completed, so that the digging hole 3
By manpowered work using a call pick, or mechanical excavation carried out by carrying in an unillustrated excavator equipped with a rock drilling machine and a cutter into the digging hole 37 for the wall surface 38 of 7
A vertical hole 36 is formed by hitting or finishing digging. After the liner 33 is attached to the wall surface 39 by a conventional method, the above steps are repeated to further excavate the ground, and if necessary, the bottom excavation is performed by manpower or another mechanical excavation device to a predetermined depth. And a vertical shaft 30 having a shape is formed.

【0019】この掘進め時には、テレスコピックアーム
10は順次先端部12を繰出して全長を長くして使用す
る。そしてこの先端部12に取付けたアースオーガ20
の駆動機部21の出力軸21aとオーガスクリュー22
との間には連結ロッド23を取付けてあるので、オーガ
スクリュー22の長さよりも深い孔35、従ってオーガ
スクリュー22の長さよりも深い立穴36の掘削が可能
となり、ひとつの立坑30を形成させるための立穴36
の掘削回数は少なくて済み、アースオーガ20とクラム
シェル25の交換回数も少なくて済み、立坑掘削工程を
簡潔化できる。また掘削地盤が土砂層などの軟質の土質
の場合など、必要に応じて連結ロッド23をさらに長尺
のものに交換したり、複数本の連結ロッド23を直列に
接続して用いることにより、さらに深い孔35、立穴3
6の掘削が可能となるのである。
At the time of this digging, the telescopic arm 10 is used by gradually extending the tip portion 12 to make the entire length longer. And the earth auger 20 attached to this tip portion 12
Output shaft 21a of the drive unit 21 and the auger screw 22
Since the connecting rod 23 is attached between the and, the hole 35 deeper than the length of the auger screw 22, and thus the vertical hole 36 deeper than the length of the auger screw 22, can be excavated to form one vertical shaft 30. Standing hole 36 for
The number of excavations is small, and the number of exchanging the earth auger 20 and the clam shell 25 is small, so that the shaft excavation process can be simplified. In addition, when the excavated ground is a soft soil such as a soil layer, the connecting rod 23 may be replaced with a longer one as necessary, or a plurality of connecting rods 23 may be connected in series to be used. Deep hole 35, vertical hole 3
6 excavations will be possible.

【0020】また上記掘進め中に、アースオーガ20に
よる掘削が困難な硬岩層があらわれた場合は、地盤部に
人力あるいは別の機械穿孔装置等により発破穴を穿孔し
て、発破により地盤を切崩して立穴を形成する従来知ら
れている発破工法に切替えて、掘進めをおこなえばよ
い。
When a hard rock layer which is difficult to be excavated by the earth auger 20 appears during the above-mentioned excavation, a blast hole is punched in the ground portion manually or by another mechanical piercing device, and the ground is cut by blasting. It is sufficient to switch to a conventionally known blasting method in which the holes are broken down to form vertical holes, and the digging is performed.

【0021】この発明は上記の例に限定されるものでは
なく、たとえばテレスコピックアーム10、アースオー
ガ20、クラムシェル25等の具体的構造は上記以外の
ものとしてもよく、またオーガスクリュー22が充分長
尺のものである場合や土質などによっては、連結ロッド
23を用いずに駆動機部21の出力軸21aにオーガス
クリュー22の基部22aを直接連結したアースオーガ
によっても、この発明の工法は実施できる。
The present invention is not limited to the above-mentioned example, and the concrete structures of the telescopic arm 10, the earth auger 20, the clam shell 25, etc. may be other than those described above, and the auger screw 22 is sufficiently long. The construction method of the present invention can be carried out by an earth auger in which the base 22a of the auger screw 22 is directly connected to the output shaft 21a of the drive unit 21 without using the connecting rod 23 depending on the length or soil quality. .

【0022】またこの発明は、軟岩よりも軟質の土質部
分、たとえば上記の例における地上から深さHまでの躯
体部32あるいは柱体部31の掘削にも適用できるもの
であり、このとき掘削壁面が崩落しやすい土質の場合に
は、上記立掘穴37を形成するだけでその壁面38が自
然崩落して、ライナ33の施工が可能な立穴36が形成
されるケースもあり、このときは上記の壁面38部の当
り取りや仕上掘りは不要になる。
The present invention is also applicable to the excavation of a soil portion softer than soft rock, for example, the skeleton portion 32 or the column portion 31 from the ground to the depth H in the above example. If the soil is apt to collapse, there is a case where the wall 38 is naturally collapsed only by forming the digging hole 37 to form the pit 36 on which the liner 33 can be constructed. It is not necessary to hit the wall portion 38 or finish dig.

【0023】またこの発明は、たとえば一般土木工事の
連続基礎など、上記の鉄塔用の深礎基礎以外の各種基礎
を構築する際の立坑の掘削にも適用できるものである。
The present invention can also be applied to the excavation of a vertical shaft when constructing various foundations other than the above-mentioned deep foundation foundations for steel towers, such as continuous foundations for general civil engineering work.

【0024】[0024]

【発明の効果】以上説明したようにこの発明によれば、
アースオーガによる孔の掘削とクラムシェルによる隣合
う各孔間の地盤の切崩しによって、軟岩層から成る地盤
に対しても確実に立穴を掘削でき、地盤の土質が土砂層
から成る場合だけでなく、軟岩層から成る場合でも、人
力作業によることなく能率よく立穴の掘削をおこなうこ
とができる。またアースオーガ駆動用とクラムシェル駆
動用に、油圧ショベルおよびテレスコピックアームを共
用して用いるので、施工現地における準備・使用機材は
少なくて済む。
As described above, according to the present invention,
By excavating a hole with an earth auger and breaking down the ground between adjacent holes with a clamshell, it is possible to excavate a vertical hole reliably even for the ground consisting of soft rock layers, and only when the soil is composed of a soil layer. Even if it consists of a soft rock layer, it is possible to efficiently excavate a vertical hole without manual labor. Also, since the hydraulic excavator and the telescopic arm are used in common for driving the earth auger and clamshell, less equipment is required on the construction site.

【0025】また上記の効果に加えて、請求項2記載の
発明によれば、アースオーガのオーガスクリューの長さ
よりも深い立穴の掘削が可能となり、立坑掘削工程を簡
潔化できる。
In addition to the above effects, according to the invention of claim 2, it becomes possible to excavate a vertical hole deeper than the length of the auger screw of the earth auger, and the vertical shaft excavating process can be simplified.

【図面の簡単な説明】[Brief description of drawings]

【図1】この発明の実施の形態の一例におけるアースオ
ーガによる掘削状態を示す縦断面図である。
FIG. 1 is a vertical cross-sectional view showing a state of excavation by an earth auger according to an example of an embodiment of the present invention.

【図2】図1におけるアースオーガの部分拡大正面図で
ある。
FIG. 2 is a partially enlarged front view of the earth auger in FIG.

【図3】図1における孔35の配置例を示す平面図(図
1のA−A線拡大断面図)である。
FIG. 3 is a plan view (enlarged sectional view taken along line AA of FIG. 1) showing an arrangement example of holes 35 in FIG.

【図4】立坑の掘削進行状況を示す模式縦断面図であ
る。
FIG. 4 is a schematic vertical sectional view showing the progress of excavation of a vertical shaft.

【図5】図1においてアースオーガに替えてクラムシェ
ルを取付けた状態を示す縦断面図である。
5 is a vertical cross-sectional view showing a state in which a clam shell is attached instead of the earth auger in FIG.

【符号の説明】[Explanation of symbols]

1…油圧ショベル、6…ブーム、10…テレスコピック
アーム、11…基部、12…先端部、20…アースオー
ガ、21…駆動機部、21a…出力軸、22…オーガス
クリュー、22a…基部、23…連結ロッド、24…カ
ップリング、25…クラムシェル、33…ライナ、34
…地盤、35…孔、36…立穴、39…壁面。
DESCRIPTION OF SYMBOLS 1 ... Hydraulic excavator, 6 ... Boom, 10 ... Telescopic arm, 11 ... Base part, 12 ... Tip part, 20 ... Earth auger, 21 ... Drive part, 21a ... Output shaft, 22 ... Auger screw, 22a ... Base part, 23 ... Connecting rod, 24 ... Coupling, 25 ... Clamshell, 33 ... Liner, 34
... Ground, 35 ... Hole, 36 ... Standing hole, 39 ... Wall surface.

───────────────────────────────────────────────────── フロントページの続き (72)発明者 早瀬 雄一 愛知県名古屋市港区千年3丁目1番32号 株式会社トーエネック本店別館内 (72)発明者 辻 八郎 岐阜県岐阜市宇佐南4丁目4番20号 エイ ト工業株式会社内 Fターム(参考) 2D029 CB01 CC02 CD06 GA02    ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Yuichi Hayase             Aichi Prefecture, Nagoya City, Minato-ku, 3-3-1, 1000             Toeneck Co., Ltd. Main store annex (72) Inventor Hachiro Tsuji             Gifu Prefecture Gifu City Usanan 4-chome 4-20 A             Tokogyo Co., Ltd. F-term (reference) 2D029 CB01 CC02 CD06 GA02

Claims (2)

【特許請求の範囲】[Claims] 【請求項1】 所定の深さの立穴の掘削と、その掘削土
砂の搬出と、掘削壁面のライナによる補強とを繰返して
掘進めて行く立坑の掘削工法において、 地上に配置された油圧ショベルのブームに、テレスコピ
ックアームの基部を取付け、このテレスコピックアーム
の先端部に垂設したアースオーガにより、前記立穴の直
径範囲内の地盤部分に所定の間隔で多数本の円柱状の孔
を掘削し、 次に前記テレスコピックアームの先端部にクラムシェル
を取付け、前記テレスコピックアームにより昇降駆動さ
れる前記クラムシェルによって隣合う前記各孔間の地盤
の切崩しと土砂の掻取りおよびこの掻取った土砂の搬出
をおこなうことを特徴とする、アースオーガによる立坑
の掘削工法。
1. A hydraulic excavator arranged on the ground in a vertical shaft excavation method in which excavation of a vertical hole having a predetermined depth, removal of the excavated earth and sand, and reinforcement of an excavated wall surface by a liner are repeated. Attach the base part of the telescopic arm to the boom of No. 2, and drill a large number of cylindrical holes at a predetermined interval in the ground part within the diameter range of the vertical hole with an earth auger hanging at the tip of this telescopic arm. Then, a clam shell is attached to the tip of the telescopic arm, and the ground is broken and soil is scraped between the holes adjacent to each other by the clam shell that is vertically driven by the telescopic arm, and the scraped sand is removed. A vertical shaft excavation method using an earth auger, which is characterized by carrying out.
【請求項2】 油圧ショベルのブームに、テレスコピッ
クアームの基部を取付け、このテレスコピックアームの
先端部にアースオーガの回転駆動機部を垂設し、この回
転駆動機部の出力軸に、交換自在な連結ロッドを介し
て、アースオーガのオーガスクリューの基部を連結した
ことを特徴とする掘削装置。
2. A base of a telescopic arm is attached to a boom of a hydraulic excavator, a rotary drive unit of an earth auger is vertically installed at a tip end of the telescopic arm, and an output shaft of the rotary drive unit is replaceable. An excavator characterized in that the base of an auger screw of an earth auger is connected via a connecting rod.
JP2002130422A 2002-05-02 2002-05-02 Shaft excavation method and excavation equipment by earth auger Expired - Fee Related JP4000004B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2002130422A JP4000004B2 (en) 2002-05-02 2002-05-02 Shaft excavation method and excavation equipment by earth auger

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2002130422A JP4000004B2 (en) 2002-05-02 2002-05-02 Shaft excavation method and excavation equipment by earth auger

Publications (2)

Publication Number Publication Date
JP2003321988A true JP2003321988A (en) 2003-11-14
JP4000004B2 JP4000004B2 (en) 2007-10-31

Family

ID=29543483

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Application Number Title Priority Date Filing Date
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Country Link
JP (1) JP4000004B2 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102434097A (en) * 2011-08-23 2012-05-02 谢清光 Rapid piling process
CN104878762A (en) * 2015-05-15 2015-09-02 中铁三局集团有限公司 Bored pile construction method suitable for tilt hard rock section
CN106759282A (en) * 2016-12-30 2017-05-31 安徽省建筑科学研究设计院 A kind of mechanical hole building method of super-large diameter hard rock bored concrete pile half
JP6298568B1 (en) * 2017-09-14 2018-03-20 株式会社加藤建設 Shaft excavation apparatus and shaft excavation method
JP2019196623A (en) * 2018-05-09 2019-11-14 鹿島建設株式会社 Drilling machine and drilling method

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Publication number Priority date Publication date Assignee Title
CN106988361A (en) * 2017-03-20 2017-07-28 刘惠军 Pick machine is repaiied in a kind of square hole stake

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102434097A (en) * 2011-08-23 2012-05-02 谢清光 Rapid piling process
CN104878762A (en) * 2015-05-15 2015-09-02 中铁三局集团有限公司 Bored pile construction method suitable for tilt hard rock section
CN106759282A (en) * 2016-12-30 2017-05-31 安徽省建筑科学研究设计院 A kind of mechanical hole building method of super-large diameter hard rock bored concrete pile half
CN106759282B (en) * 2016-12-30 2018-03-20 安徽省建筑科学研究设计院 A kind of mechanical hole building method of super-large diameter hard rock bored concrete pile half
JP6298568B1 (en) * 2017-09-14 2018-03-20 株式会社加藤建設 Shaft excavation apparatus and shaft excavation method
JP2019196623A (en) * 2018-05-09 2019-11-14 鹿島建設株式会社 Drilling machine and drilling method
JP7049176B2 (en) 2018-05-09 2022-04-06 鹿島建設株式会社 Excavation method

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