JP2003321988A - Excavation method and excavator for shaft by earth auger - Google Patents
Excavation method and excavator for shaft by earth augerInfo
- 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
Links
- 238000009412 basement excavation Methods 0.000 title claims abstract description 36
- 239000004576 sand Substances 0.000 claims abstract description 11
- 239000002689 soil Substances 0.000 claims description 21
- 235000020639 clam Nutrition 0.000 claims description 18
- 230000002787 reinforcement Effects 0.000 claims description 3
- 239000011435 rock Substances 0.000 abstract description 12
- 238000007790 scraping Methods 0.000 abstract 1
- 238000010276 construction Methods 0.000 description 5
- 210000002356 Skeleton Anatomy 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 238000005422 blasting Methods 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 230000001808 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
Abstract
Description
【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.
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)
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.
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.
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 |
|---|---|---|---|
| JP2002130422A Expired - Fee Related JP4000004B2 (en) | 2002-05-02 | 2002-05-02 | Shaft excavation method and excavation equipment by earth auger |
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| Country | Link |
|---|---|
| JP (1) | JP4000004B2 (en) |
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| 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 |
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| 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 |
|---|---|---|---|---|
| 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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| Publication number | Publication date |
|---|---|
| JP4000004B2 (en) | 2007-10-31 |
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