JPH06167013A - Drilling engineering method for continuous wall forming hole and drilling device used in the drilling method - Google Patents
Drilling engineering method for continuous wall forming hole and drilling device used in the drilling methodInfo
- Publication number
- JPH06167013A JPH06167013A JP14382892A JP14382892A JPH06167013A JP H06167013 A JPH06167013 A JP H06167013A JP 14382892 A JP14382892 A JP 14382892A JP 14382892 A JP14382892 A JP 14382892A JP H06167013 A JPH06167013 A JP H06167013A
- Authority
- JP
- Japan
- Prior art keywords
- auger
- drilling
- continuous wall
- advanced
- holes
- 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.)
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Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明はアースオーガーによって
連続壁を合理的に構築できる連続壁形成穴の掘削工法
と、その連続壁形成穴の掘削に用いられる掘削装置に関
する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for excavating a continuous wall forming hole capable of rationally constructing a continuous wall with an earth auger, and an excavating device used for excavating the continuous wall forming hole.
【０００２】[0002]
【従来の技術】従来、建設工事現場で基礎工事の掘削前
作業として行われる所要外郭部に連続擁壁（以後連続壁
と言う）を構築する作業には、杭打ち機の回転式リーダ
に多軸のアースオーガーを組み合わせて、連続穴を順次
掘削し、その後にコンクリートの打設を行う工法が採用
されている。そして、構築される連続壁が屈曲するコー
ナー部での掘削に際しては、アースオーガーの支持され
るリーダーを所要の角度に旋回させて順次連続壁が形成
されるように掘削される。2. Description of the Related Art Conventionally, in a work for constructing a continuous retaining wall (hereinafter referred to as a continuous wall) in a required outer wall portion which is performed as a pre-excavation work for foundation work at a construction site, a rotary leader of a pile driver is often used. A method is adopted in which earth augers on the shaft are combined, continuous holes are sequentially drilled, and then concrete is poured. Then, when excavating at the corner portion where the continuous wall to be constructed is bent, the leader supported by the earth auger is swung to a required angle so that the continuous wall is sequentially formed.
【０００３】[0003]
【発明が解決しようとする課題】このような従来の連続
壁形成穴の掘削工法では、多軸のアースオーガーを用い
る必要があるので、その装置全体がどうしても構造的に
複雑であり、一度に多量の土砂の掘削が行われるために
大型化することが避けられない。また、コーナー部の掘
削を行うための多軸の回転装置が駆動装置の下に組み込
まれ、構造の複雑化が避けられない。同時にアースオー
ガーが大型化して、市街地での狭い工事現場での連続壁
の構築作業に、このような多軸のアースオーガーを持ち
込んでの実施が非常に困難となる。しかしながら、比較
的小回りのきく従来のシートパイルの打ち込みによる連
続壁の構築工法は騒音や振動による環境公害を伴うので
採用できず、結果的に基礎工事に過大な工費が必要とな
る。In such a conventional method for excavating a continuous wall forming hole, since it is necessary to use a multi-axis earth auger, the entire apparatus is inevitably structurally complicated, and a large amount of it is needed at a time. It is inevitable that the soil will be enlarged due to the excavation of earth and sand. Further, a multi-axis rotating device for excavating the corner portion is incorporated under the drive device, and the structure is inevitably complicated. At the same time, the earth auger becomes large, and it becomes very difficult to bring such a multi-axis earth auger into the construction work of a continuous wall at a narrow construction site in an urban area. However, the conventional method of constructing a continuous wall by driving a sheet pile, which has a relatively small turn, cannot be adopted because it causes environmental pollution due to noise and vibration, and as a result, excessive construction cost is required for foundation work.
【０００４】本発明ではこのような従来の問題点を解決
して、通常の単一オーガーを用いて一旦所要の間隔で単
一穴を掘削後、前記オーガー先端に複数軸のオーガーヘ
ッドを連結して、さきに掘削の穴を基準として連続穴が
形成できるように掘削する二段階掘削を行うことで連続
壁の掘削を容易にする連続壁形成穴の掘削工法とその連
続壁形成穴の掘削に用いられる掘削装置の提供を目的と
する。According to the present invention, such conventional problems are solved by using a normal single auger to temporarily dig a single hole at a required interval, and then connect a plurality of auger heads to the tip of the auger. In order to facilitate continuous wall excavation by performing a two-step excavation that allows continuous holes to be formed based on the excavation hole as a reference, the continuous wall forming hole excavation method and the continuous wall forming hole excavation method The purpose is to provide a drilling rig used.
【０００５】[0005]
【課題を解決するための手段】前記の目的を達成するた
めに本発明は、単軸のアースオーガーを用いて所要の間
隔で連続壁の構築位置に基準穴を順次掘削し、その後に
前記アースオーガーのオーガーヘッドに代えて多軸オー
ガーユニットの駆動軸を連結して、さきに掘削の少なく
とも２個の基準穴に前記多軸オーガーユニットの先進オ
ーガーヘッド２本を各々挿入させて、その基準穴に沿っ
て連続させる穴を後続オーガーで掘削して連続穴を形成
する掘削工法である。In order to achieve the above-mentioned object, the present invention uses a uniaxial earth auger to sequentially drill reference holes at required intervals to construct a continuous wall, and then to ground the earth. The drive shaft of the multi-axis auger unit is connected instead of the auger head of the auger, and two advanced auger heads of the multi-axis auger unit are respectively inserted into at least two reference holes for excavation, and the reference holes are formed. It is a drilling method that forms a continuous hole by drilling a hole that is continuous along with a subsequent auger.
【０００６】また、本発明では、前記のような連続壁を
構築するための掘削装置として、単一のオーガー軸先端
に着脱可能に連結される駆動軸を有する多軸オーガーユ
ニットは、その駆動軸と並列に複数の軸を配設して、こ
れら各軸が同調駆動されるギヤーボックスと、このギヤ
ーボックスから突き出される前記各軸のうち少なくとも
その軸間隔の２ピッチ離れた２本の軸の前端にそれぞれ
取り付けられる先進オーガーヘッドと、この両先進オー
ガーヘッドを備える軸以外の軸に取り付けられる後続オ
ーガーヘッドとを備え、前記先進オーガーヘッドの回転
方向は相反する向きに回転されるようにして、その先進
オーガーヘッドと後続オーガーヘッドとはその掘削半径
の一部が重複される状態に配されていることを特徴とす
るものである。Further, according to the present invention, as the excavating device for constructing the continuous wall as described above, a multi-shaft auger unit having a drive shaft detachably connected to a tip of a single auger shaft is provided. A plurality of shafts arranged in parallel with each other, a gear box in which these shafts are synchronously driven, and two shafts protruding from the gear box, which are separated by at least 2 pitches of the shaft intervals. An advanced auger head attached to each of the front ends, and a subsequent auger head attached to a shaft other than the shaft including the both advanced auger heads, and the rotation directions of the advanced auger heads are rotated in opposite directions, The advanced auger head and the subsequent auger head are characterized in that they are arranged so that part of their digging radii overlap.
【０００７】[0007]
【作用】このような構成である本発明では、連続壁の構
築現場に単軸のアースオーガーを備えた杭打ち機を運び
込んで、先ず予め設定されている所要の間隔で連続壁の
構築位置に基準穴を多数掘削しておき、その後において
前記アースオーガーのオーガーヘッドに代えて多軸オー
ガーユニットを取り付け、さきに掘削されている基準穴
に前記多軸オーガーユニットの少なくとも２本の先進オ
ーガーヘッドを挿入させて、その２個の基準穴でそれぞ
れ先進オーガーヘッドを案内させて後続オーガーヘッド
により基準穴と連通する穴を掘削させることにより、位
置ずれすることなく小動力で簡単かつ確実に連続穴を掘
削できるのである。In the present invention having such a structure, the pile driving machine equipped with the single-axis earth auger is carried to the construction site of the continuous wall, and first, at the preset interval, the continuous wall building position is set. A large number of reference holes have been drilled, then a multi-axis auger unit is attached instead of the auger head of the earth auger, and at least two advanced auger heads of the multi-axis auger unit are attached to the reference holes previously drilled. By inserting and guiding the advanced auger head with each of the two reference holes and drilling a hole communicating with the reference hole by the succeeding auger head, a continuous hole can be easily and reliably formed with small power without displacement. You can drill.
【０００８】そして、本発明の掘削装置では、前記の連
続壁形成穴の掘削を行うに際し、ギヤーボックスから突
き出される各軸に対してその軸間ピッチの少なくとも２
ピッチ離れた位置の軸に取り付く先進オーガーヘッドが
他の軸に取り付ける後続オーガーヘッドよりも長く配さ
れるとともに、相反する方向に回転されるようにしてあ
るので、後続オーガーヘッドによる掘削時隣接する穴壁
を切り開いて掘削されてもオーガーユニット全体がねじ
れたり偏芯しての掘削が行われたりすることなく正確な
連続穴の掘削が簡単に行える。In the excavating device of the present invention, at the time of excavating the continuous wall forming hole, at least 2 of the inter-axis pitches of the axes protruding from the gear box are set.
Since the advanced auger head attached to the shaft at a pitch distance is arranged longer than the subsequent auger head attached to other shafts and rotated in opposite directions, the adjacent auger head is used for excavating adjacent holes. Even if a wall is cut open and excavated, the entire auger unit is not twisted or eccentrically excavated, and accurate continuous hole excavation can be easily performed.
【０００９】[0009]
【実施例】以下本発明の掘削工法を三本のオーガーヘッ
ドを備えた多軸オーガーユニットにてなる掘削装置を用
いた一実施例の図面を参照しつつ説明する。図１に示さ
れるのは本発明の掘削装置の一具体例正面図である。図
２は本発明の連続壁形成穴の掘削に用いられる杭打ち機
の一例を示し、(a) は全体の側面図で、(b) は単軸のオ
ーガーとして用いられる際のオーガーの態様を示す図で
ある。図３は掘削の態様を説明する図であって、(a) は
単軸のオーガーによって基準穴となる先行掘削穴を配す
る位置関係を示し、(b) はさきに掘削された基準穴に多
軸のオーガーの先進オーガーヘッドを受け入れて後続オ
ーガーヘッドにより連続穴を掘削形成する態様を示す図
であり、(c) は連続壁穴が形成される位置関係を示す図
である。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The excavation method of the present invention will be described below with reference to the drawings of an embodiment in which an excavation device composed of a multi-axis auger unit having three auger heads is used. FIG. 1 is a front view of a specific example of the excavation device of the present invention. Fig. 2 shows an example of a pile driving machine used for excavating a continuous wall forming hole of the present invention, (a) is a side view of the whole, and (b) shows a mode of an auger when used as a single-axis auger. FIG. FIG. 3 is a diagram for explaining the excavation mode. (A) shows a positional relationship in which a preceding excavation hole serving as a reference hole is arranged by a uniaxial auger, and (b) shows a reference hole excavated earlier. It is a figure which shows the aspect which accepts the advanced auger head of a multi-axis auger and excavates and forms a continuous hole with a subsequent auger head, and (c) is a figure which shows the positional relationship in which a continuous wall hole is formed.
【００１０】これらの図において、まず掘削装置として
の多軸オーガーユニット10は、図１に示されるように中
央に駆動軸12を配されて、その両側に所要の間隔で従動
する軸13，13' が、前記駆動軸12軸芯を通る鉛直平面上
でその駆動軸12と平行してギヤーボックス11内で回転自
在に支持配設されている。そして、その駆動軸12の図上
上側に突出される軸端部12' は例えばねじ軸に形成され
て、単軸のアースオーガー５（以下単にオーガー５と言
う）の軸5'端部に嵌合させて連結されるようになってい
る。In these figures, first, a multi-axis auger unit 10 as an excavator has a drive shaft 12 arranged at the center as shown in FIG. 1, and shafts 13 and 13 driven on both sides of the drive shaft 12 at required intervals. ′ Is rotatably supported in the gear box 11 in parallel with the drive shaft 12 on a vertical plane passing through the axis of the drive shaft 12. The shaft end 12 'of the drive shaft 12 protruding upward in the drawing is formed, for example, as a screw shaft, and is fitted to the shaft 5'end of a single-shaft earth auger 5 (hereinafter simply referred to as auger 5). It is designed to be joined together.
【００１１】この駆動軸12の図上下側（以下いずれも図
上における向きで表現する）突出の軸端部12" には後続
オーガーヘッド15の軸端が着脱可能に嵌合連結されてい
る。また、駆動軸12の両側に配される軸13，13' には、
その下側突出の軸端部13a ，13a に、それぞれ先進オー
ガーヘッド16，17の各軸16' ，17' 端がそれぞれ連結固
着されている。これらの両軸16' ，17' は連結する軸1
3, 13' がギヤーボックス11内で相反する方向に回転さ
れるように、駆動軸12から動力を受けて同調回転できる
図示されないギヤー駆動機構によって動力が伝達され
る。The shaft end of the succeeding auger head 15 is detachably fitted and connected to the shaft end portion 12 "of the drive shaft 12 projecting from the upper and lower sides of the drawing (hereinafter referred to as directions in the drawings). Also, the shafts 13 and 13 'arranged on both sides of the drive shaft 12 are
The shaft ends 16a and 17a of the advanced auger heads 16 and 17 are connected and fixed to the shaft ends 13a and 13a, respectively, which project downward. These shafts 16 'and 17' are the connecting shaft 1
Power is transmitted by a gear drive mechanism (not shown) capable of performing synchronous rotation by receiving power from the drive shaft 12 so that 3, 13 'are rotated in opposite directions in the gear box 11.
【００１２】前記先進オーガーヘッド16，17は、各軸1
6' ，17' 先端部に取り付くカッタービット18を備えた
掘削羽根16a ，17a が、左側の先進オーガーヘッド16と
右側の先進オーガーヘッド17とを、例えば一方が左廻り
に、他方が右廻りとなるように、それぞれ向きを変えて
ある。そして、この両先進オーガーヘッド16，17の長さ
は中央の後続オーガーヘッド15よりも長くなるようにし
て、かつその後続オーガーヘッド15の掘削羽根15a の外
周と先進オーガーヘッド16，17の掘削羽根16a ，17a の
外周とが、それぞれに一部重複する関係で設けられてい
る。また、軸13，13' の上側突出端部には前記左側の軸
13に右方向にねじれた掘削羽根19a を有するオーガーヘ
ッド19が、また右側の軸13' に左方向にねじれた掘削羽
根20a を有するオーガーヘッド20が、それぞれ固着され
ている。Each of the advanced auger heads 16 and 17 has a shaft 1
6 ', 17' Excavation blades 16a, 17a with cutter bits 18 attached to the tips of the left and right advanced auger heads 16 and 17, for example, one on the left and the other on the right. The orientation is changed so that The lengths of the advanced auger heads 16 and 17 are longer than that of the succeeding auger head 15 in the center, and the outer periphery of the excavating blade 15a of the succeeding auger head 15 and the excavating blades of the advanced auger heads 16 and 17 are large. The outer circumferences of 16a and 17a are provided so as to partially overlap each other. Also, the left side shaft is attached to the upper protruding end of the shaft 13, 13 '.
An auger head 19 having a right-handed excavating blade 19a is fixed to 13 and a right-hand auger head 20 having a left-handed excavating blade 20a is fixed to a shaft 13 '.
【００１３】次に本発明の掘削工法を説明すると、図２
に示されるようなクレーン車１のブーム２先端にオーガ
ー５を吊り下げ掘削する形式の従来公知の杭打ち機Ａを
作業現場に運び込んで単軸のオーガー５をブーム２から
吊り下げて、そのオーガー５の先端に取り付くオーガー
ヘッド６にて連続壁構築位置で先ず単一の穴を所要の深
さに掘削させる。なお、図中符号４はオーガー５の駆動
装置３を吊下げる取付け金具である。この単軸のオーガ
ー５による掘削に際しては、先に説明したオーガーユニ
ット10における先進オーガーヘッド16，17のピッチＰ、
すなわち後続オーガーヘッド15を含めての軸間２ピッチ
２Ｐで図３(a) で示されるように連続壁構築位置に順次
単一の穴Ｂ（次の工程での基準穴となる）を掘削する。Next, the excavation method of the present invention will be described with reference to FIG.
As shown in FIG. 1, a conventionally known pile driver A of the type in which the auger 5 is suspended and excavated from the boom 2 of the crane vehicle 1 is carried to a work site, and the single-axis auger 5 is suspended from the boom 2 and then the auger 5 is suspended. First, a single hole is excavated to a required depth at a continuous wall building position by an auger head 6 attached to the tip of 5. In addition, reference numeral 4 in the drawing is a fitting for suspending the drive device 3 of the auger 5. When excavating with the uniaxial auger 5, the pitch P of the advanced auger heads 16 and 17 in the auger unit 10 described above,
That is, as shown in FIG. 3 (a), a single hole B (which serves as a reference hole in the next step) is sequentially drilled at the continuous wall building position with the two pitches 2P between the axes including the subsequent auger head 15. .
【００１４】次に前記の単一の穴（基準穴）Ｂの掘削が
所要範囲に掘削し終えたならば、単軸のオーガー５の軸
5'先端からオーガーヘッド６を取り外し、このオーガー
ヘッド６が取り外された軸5'端に、図１に示されるよう
に、多軸のオーガーユニット10における駆動軸12の上側
突出の軸端部12' を連結固定（例えばねじ連結後セット
ボルトで固定）して多軸のオーガーユニット10を装着す
る。Next, when the excavation of the single hole (reference hole) B is completed within the required range, the axis of the single-axis auger 5 is moved.
The auger head 6 is removed from the tip of the 5'and the shaft 5'end from which the auger head 6 is removed is attached to the shaft end 12 of the driving shaft 12 of the multi-shaft auger unit 10 as shown in FIG. 'Is connected and fixed (for example, fixed with a set bolt after screw connection), and the multi-axis auger unit 10 is mounted.
【００１５】この多軸のオーガーユニット10が装着され
た状態で、杭打ち機Ａを先に掘削された単一の穴Ｂ（基
準穴）２個を基準にして、図３(b) で示すようにこれら
基準穴Ｂに多軸のオーガーユニット10の先進オーガーヘ
ッド16，17を挿入し、そのまま駆動装置３を下降させ
る。すると、オーガー軸5'に与えられる動力がギヤーボ
ックス11内でのギヤー駆動によって駆動軸12から両側に
位置する軸13と軸13' とに相反する方向の回転力が与え
られる。軸13に連結される先進オーガーヘッド16が左回
転されると、軸13' に連結される先進オーガーヘッド17
が右回転させられて基準穴Ｂ内を進行し、駆動軸12に直
結される後続オーガーヘッド15は両基準穴Ｂ，Ｂ間にお
ける部分を掘削し、図３(c) で示されるように先に掘削
済みの基準穴Ｂ，Ｂ間に別の穴Ｃが掘削される。With the multi-axis auger unit 10 attached, two single holes B (reference holes) previously drilled by the pile driver A are used as a reference, as shown in FIG. 3 (b). Thus, the advanced auger heads 16 and 17 of the multi-axis auger unit 10 are inserted into these reference holes B, and the drive device 3 is lowered as it is. Then, the driving force applied to the auger shaft 5 ′ is given a rotational force in opposite directions to the shaft 13 and the shaft 13 ′ located on both sides of the drive shaft 12 by the gear drive in the gear box 11. When the advanced auger head 16 connected to the shaft 13 is rotated counterclockwise, the advanced auger head 17 connected to the shaft 13 'is rotated.
Is rotated rightward to advance in the reference hole B, and the subsequent auger head 15 directly connected to the drive shaft 12 excavates a portion between the reference holes B and B, and as shown in FIG. Another hole C is drilled between the already drilled reference holes B and B.
【００１６】このようにして両先進オーガーヘッド16，
17による先導で基準穴Ｂ，Ｂ間を後続オーガーヘッド15
により別の穴Ｃを掘削すると、前記のように両先進オー
ガーヘッド16，17と後続オーガーヘッド15との掘削半径
が重複される関係にあるから、新たに掘削される別の穴
Ｃの掘削によって、左右両基準穴Ｂ，Ｂの一部a ，a'が
図３(c) で示されるように連通され、その結果連続した
穴Ｄが形成されることになる。In this way, both advanced auger heads 16,
The leading auger 17 leads the trailing auger head between the reference holes B and B 15
When another hole C is drilled by the above, since the drilling radii of the advanced auger heads 16 and 17 and the subsequent auger head 15 are overlapped with each other as described above, the drilling of another hole C newly drilled , The left and right reference holes B, part of a and a'of the B are communicated as shown in FIG. 3 (c), and as a result, a continuous hole D is formed.
【００１７】次に前記のようにして三個の穴Ｂ，Ｃ，Ｂ
が連結する穴Ｄに対し、更に隣接部を連続させるために
は、図３(c) で示される基準穴Baと次の右側の基準穴Bb
とに先進オーガーヘッド16，17を合致させて、前記要領
で後続オーガーヘッド15により基準穴Ba，Bb間を掘削す
る。以後このような操作を繰り返して連続壁形成の穴が
形成される。この連続する穴Ｄに掘削形成される際、後
続オーガーヘッド15による掘削は、その両側に位置する
先進オーガーヘッド16と17とが相反する方向に回転しつ
つ前進されるので、駆動軸12と直結する後続オーガーヘ
ッド15の掘削によって生じるモーメントは両先進オーガ
ーヘッド16，17によるそれぞれのトルクの相殺で、後続
オーガーヘッド15の回転トルクだけが生じるため少ない
駆動力で掘削されることになる。なお、両先進オーガー
ヘッド16，17が取り付く軸13，13' の各上側軸端に付設
されるオーガーヘッド19，20は、掘削の進行に伴う掘削
土砂を上方に排除させる役目をなす。Next, as described above, the three holes B, C, B
In order to further connect the adjacent portion to the hole D that is connected by, the reference hole Ba shown in FIG. 3 (c) and the next reference hole Bb on the right side are shown.
The advanced auger heads 16 and 17 are matched with and, and the space between the reference holes Ba and Bb is excavated by the subsequent auger head 15 in the same manner as described above. Thereafter, such an operation is repeated to form a hole for forming a continuous wall. When excavating and forming in the continuous hole D, the excavation by the subsequent auger head 15 is advanced while the advanced auger heads 16 and 17 located on both sides thereof are rotated while rotating in opposite directions, so that the drive shaft 12 is directly connected. The moment generated by the excavation of the succeeding auger head 15 is offset by the torques of the advanced auger heads 16 and 17, and only the rotational torque of the succeeding auger head 15 is produced, so that the excavation is performed with a small driving force. The auger heads 19 and 20 attached to the upper shaft ends of the shafts 13 and 13 'to which the advanced auger heads 16 and 17 are attached respectively serve to remove the excavated sediment along with the progress of excavation.
【００１８】以上の実施例では三本のオーガーを備えた
オーガーユニットを用いた場合について説明したが、必
要に応じてそれ以上例えば５本のオーガーを備える多軸
のオーガーユニットを用いることもできる。このような
多数本の場合、左右のバランスを取るために、先進オー
ガーヘッドは中央軸線を基準にして対称に配されること
が好ましい。また、本発明の連続壁形成穴の掘削工法
は、上記実施例に限定されるものではなく、例えば図４
で示されるような公知のリーダー７を用いる杭打ち機
Ａ’を使用して実施することもできる。この図中前記実
施例のものと同様の部分については同一の符号を付して
説明を省略する。In the above embodiments, the case of using the auger unit having three augers has been described, but a multi-axis auger unit having more than five augers, for example, may be used if necessary. In the case of such a large number, the advanced auger heads are preferably arranged symmetrically with respect to the central axis in order to balance the left and right. Further, the method for excavating the continuous wall forming hole of the present invention is not limited to the above-mentioned embodiment, and for example, as shown in FIG.
It can also be carried out by using a pile driver A ′ using a known leader 7 as shown in FIG. In this figure, the same parts as those of the above-mentioned embodiment are designated by the same reference numerals and the description thereof will be omitted.
【００１９】[0019]
【発明の効果】上記のように本発明によれば、連結壁形
成穴を掘削するにあたり二工程に分けて掘削するので、
第１の工程となる単一の穴の掘削と、第２の工程となる
連続させる穴の掘削とが、いずれも実質的に最小数の穴
を掘削することになってオーガーの駆動力が少なくて済
む。したがって、小型の杭打ち機を用いて掘削できるの
で、狭い工事現場でも無理なく施工できる。また、この
連続壁形成穴用の掘削装置は、簡単な構成で掘削時２本
の先進オーガーヘッドによって実質的な掘削を行う後続
オーガーヘッドの掘進姿勢を正しく保てるようにされて
いるので、簡単な操作で正確な掘削ができる。As described above, according to the present invention, since the connection wall forming hole is excavated in two steps,
Both the excavation of a single hole, which is the first step, and the excavation of continuous holes, which is the second step, both result in the excavation of a substantially minimum number of holes, and the driving force of the auger is small. Complete. Therefore, since it is possible to excavate using a small-sized pile driver, it is possible to perform the construction easily even in a narrow construction site. In addition, the drilling device for the continuous wall forming hole has a simple structure and is capable of accurately maintaining the digging posture of the succeeding auger head which is substantially drilled by the two advanced auger heads during drilling. Accurate excavation can be done by operation.
【図１】本発明の掘削装置の一具体例正面図である。FIG. 1 is a front view of a specific example of an excavation device of the present invention.
【図２】本発明の連続壁形成穴の掘削に用いられる杭打
ち機の一例を示し、(a) は全体の側面図で、(b) は単軸
のオーガーとして用いられる際のオーガーの態様を示す
図である。FIG. 2 shows an example of a pile driver used for excavating a continuous wall forming hole of the present invention, (a) is a side view of the whole, and (b) is a mode of an auger when used as a uniaxial auger. FIG.
【図３】掘削の態様を説明する図であって、(a) は単軸
のオーガーによって基準穴となる先行掘削穴を配する位
置関係を示し、(b) は先に掘削された基準穴に多軸のオ
ーガーの先進オーガーヘッドを受け入れて後続オーガー
ヘッドにより連続穴を掘削形成する態様を示す図であ
り、(c) は連続壁穴が形成される位置関係を示す図であ
る。FIG. 3 is a diagram for explaining a mode of excavation, where (a) shows a positional relationship in which a preceding excavation hole serving as a reference hole is arranged by a uniaxial auger, and (b) shows a reference hole previously excavated. It is a figure which shows the aspect which accepts the advanced auger head of a multi-axis auger and excavates and forms a continuous hole with a subsequent auger head, and (c) is a figure which shows the positional relationship in which a continuous wall hole is formed.
【図４】本発明の連続壁形成穴の掘削に用いられる杭打
ち機の別例を示す図である。FIG. 4 is a view showing another example of the pile driver used for excavating the continuous wall forming hole of the present invention.
１ 本発明で使用されるクレーン車 ２ ブーム ３ 駆動装置 ５ 単軸のオーガー ５’ オーガーの軸 ６ 単軸のオーガーヘッド ７ リーダー １０ 多軸オーガーユニット １１ ギヤーボックス １２ 駆動軸 １２’，１２” 駆動軸の軸端部 １３，１３’ 従動する軸 １５ 後続オーガーヘッド １６，１７ 先進オーガーヘッド １５ａ，１６ａ，１７ａ，１９ａ，２０ａ 掘削羽根 １９，２０ オーガーヘッド Ａ，Ａ’ 杭打ち機 Ｂ 基準穴 Ｃ 穴 Ｄ 連続する穴 DESCRIPTION OF SYMBOLS 1 Crane vehicle used in the present invention 2 Boom 3 Drive device 5 Single-axis auger 5'Auger shaft 6 Single-axis auger head 7 Leader 10 Multi-axis auger unit 11 Gear box 12 Drive shaft 12 ', 12 "Drive shaft Shaft end part 13,13 'Driven shaft 15 Subsequent auger head 16,17 Advanced auger head 15a, 16a, 17a, 19a, 20a Drilling blade 19,20 Auger head A, A'Pile driver B Reference hole C Hole D Consecutive holes
Claims (2)
隔で連続壁の構築位置に基準穴を順次掘削し、その後に
前記アースオーガーのオーガーヘッドに代えて多軸オー
ガーユニットの駆動軸を連結して、さきに掘削の少なく
とも２個の基準穴に前記多軸オーガーユニットの先進オ
ーガーヘッド２本を各々挿入させて、その基準穴に沿っ
て連続させる穴を後続オーガーで掘削して連続穴を形成
することを特徴とする連続壁形成穴の掘削工法。1. A single-axis earth auger is used to sequentially drill reference holes at required positions in a continuous wall construction position, and then the drive shaft of a multi-axis auger unit is connected in place of the auger head of the earth auger. Then, each of the two advanced auger heads of the multi-axis auger unit is inserted into at least two reference holes for drilling, and a continuous auger is drilled with successive auger holes to form a continuous hole along the reference hole. A method for excavating a continuous wall forming hole, which is characterized by forming.
て、単一のオーガー軸先端に着脱可能に連結される駆動
軸を有する多軸オーガーユニットは、その駆動軸と並列
に複数の軸を配設して、これら各軸が同調駆動されるギ
ヤーボックスと、このギヤーボックスから突き出される
前記各軸のうち少なくともその軸間隔の２ピッチ離れた
２本の軸の前端にそれぞれ取り付けられる先進オーガー
ヘッドと、この両先進オーガーヘッドを備える軸以外の
軸に取り付けられる後続オーガーヘッドとを備え、前記
先進オーガーヘッドの回転方向は相反する向きに回転さ
れるようにして、その先進オーガーヘッドと後続オーガ
ーヘッドとはその掘削半径の一部が重複される状態に配
されていることを特徴とする連続壁形成穴の掘削に用い
られる掘削装置。2. A multi-axis auger unit having a drive shaft detachably connected to a single auger shaft tip as an excavator for constructing a continuous wall, wherein a plurality of shafts are arranged in parallel with the drive shaft. A gearbox in which each of these shafts is synchronously driven, and an advanced auger head attached to the front ends of at least two shafts of the shafts protruding from the gearbox, which are separated by at least two pitches. And a subsequent auger head attached to a shaft other than the shaft including the advanced auger head, the advanced auger head is rotated in opposite directions, and the advanced auger head and the subsequent auger head are rotated. Is a drilling device used for drilling a continuous wall forming hole, wherein the drilling radii are partially overlapped.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14382892A JPH06167013A (en) | 1992-06-04 | 1992-06-04 | Drilling engineering method for continuous wall forming hole and drilling device used in the drilling method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14382892A JPH06167013A (en) | 1992-06-04 | 1992-06-04 | Drilling engineering method for continuous wall forming hole and drilling device used in the drilling method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH06167013A true JPH06167013A (en) | 1994-06-14 |
Family
ID=15347895
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14382892A Withdrawn JPH06167013A (en) | 1992-06-04 | 1992-06-04 | Drilling engineering method for continuous wall forming hole and drilling device used in the drilling method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06167013A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101219377B1 (en) * | 2011-05-11 | 2013-01-10 | 주식회사 대창중기계 | Earth auger machine having multi shaft |
| JP2019090271A (en) * | 2017-11-16 | 2019-06-13 | 株式会社竹中工務店 | Management method of verticality of shaft member, and construction method of earth retaining wall |
-
1992
- 1992-06-04 JP JP14382892A patent/JPH06167013A/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101219377B1 (en) * | 2011-05-11 | 2013-01-10 | 주식회사 대창중기계 | Earth auger machine having multi shaft |
| JP2019090271A (en) * | 2017-11-16 | 2019-06-13 | 株式会社竹中工務店 | Management method of verticality of shaft member, and construction method of earth retaining wall |
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| A300 | Withdrawal of application because of no request for examination |
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