JP3660048B2 - Continuous wall excavator - Google Patents

Continuous wall excavator Download PDF

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Publication number
JP3660048B2
JP3660048B2 JP08384496A JP8384496A JP3660048B2 JP 3660048 B2 JP3660048 B2 JP 3660048B2 JP 08384496 A JP08384496 A JP 08384496A JP 8384496 A JP8384496 A JP 8384496A JP 3660048 B2 JP3660048 B2 JP 3660048B2
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JP
Japan
Prior art keywords
support leg
slide post
excavation
main
continuous wall
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.)
Expired - Fee Related
Application number
JP08384496A
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Japanese (ja)
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JPH09273173A (en
Inventor
野 衛 浜
川 悦 雄 平
康 一 捧
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.)
Sanwa Kizai Co Ltd
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Sanwa Kizai Co Ltd
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Filing date
Publication date
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Priority to JP08384496A priority Critical patent/JP3660048B2/en
Publication of JPH09273173A publication Critical patent/JPH09273173A/en
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Description

【0001】
【発明の属する技術分野】
本発明は、地中に連続壁を造成するに適する連続壁掘削機に関する。
【0002】
【従来の技術】
従来から、地盤を掘削してその掘削跡に連続壁を造成することが行われている。このような地中連続壁の造成のための掘削には、従来、駆動部に複数本の掘削軸を並列して垂下し、これら掘削軸により竪穴列を掘削し、その竪穴の一部をラップさせて一連の穴とすることにより地中に連続柱列を形成し、これにより連続壁とする工法が広く知られている。
【0003】
【発明が解決しようとする課題】
しかるに上記従来の工法に用いられる掘削機は、個々の掘削軸を回転させて地盤を削孔するので、その掘削軸の回転反力を受けるために駆動部を支持する堅牢なリーダマストが必要となり、装置全体が著しく大掛りなものとならざるを得ないという問題点があった。
【0004】
【課題を解決するための手段】
本発明は、装置を大型化することなく地盤に竪穴を掘削し、連続壁を造成することができる連続壁掘削機を提供することを課題とするもので、作業現場に立設する支持体に昇降自在でかつ水平面内で回転不能に吊下されたスライドポストと、このスライドポストの下端に設けられ長方形断面の竪穴を掘削する掘削装置とを備え、この掘削装置は、前記スライドポストの下端に形成された2又状の支持脚部を有し、前記それぞれの支持脚部には該支持脚部の略全長にわたってその一側部に無端回動自在とされたチエン状の主掘削刃と、この主掘削刃の下端縁と下端縁が略一致するドラム型の副掘削刃とが並設され、かつ一方の支持脚部の主掘削刃と他方の支持脚部の副掘削刃とが互い違いに隣り合うように配置したことを特徴とする。
【0005】
したがって上記チエン状の主掘削刃およびドラム型の副掘削刃を回転駆動しつつスライドポストを下降させることにより地盤が削孔される。このとき上記主掘削刃およびこれを支持するスライドポストには水平面内での回転トルクの反力が作用しないので、スライドポストを支持する支持体は比較的軽量かつ小型なものですみ、装置全体の構造をコンパクトに構成することができる。また副掘削刃が前記支持脚部の範囲を掘削するので掘り残しがない。
【0006】
【発明の実施の形態】
以下、本発明を図面に示す実施の形態を参照して説明する。
【0007】
図1は本発明による連続壁掘削機の全体構成例の側面を示し、図2(A),(B)は同主要部の正面および側面を示し、さらに図2(C)は図2(B)のA−A矢視を示している。
【0008】
上記図において、スライドポスト1は両側縁が円弧状とされた偏平形状を有し、その上端が作業機械2の支持体としてのブーム3の上部にワイヤ4、滑車5,6を介して吊持され、このスライドポスト1の下方部は作業機械2の前方に延びるアーム7に支持部8を介して昇降可能かつ水平面内では不回転に支持され、前記ワイヤ4の巻上げ巻下げによりスライドポスト1が支持部8にそって上下動されるようになっている。
【0009】
上記支持部8は、図2(A),(C)にその一例を示すように、前記アーム7の先端の軸受部9に左右の把持部材10の基部10bが共通の軸11により水平面内で回転自在に枢支され、これら把持部材10の先端は前記スライドポスト1の側縁に嵌合する凹部を有する把持部10a,10aとされ、基部10bに図示しないボルト等で固定されている。各把持部10a,10aの後方位置には、基部が前記アーム7に枢支されたシリンダ12,12のピストンロッド12a,12aの先端が連結されていて、シリンダ12,12のピストンロッド12a,12aの作動により把持部材10が水平面内で旋回可能とされ、コーナー部での掘削時等に首を振れるようになっている。
【0010】
前記スライドポスト1の下端部は、正面よりみて図2(A)のように2又状に分岐されて支持脚部13,13とされており、これら支持脚部13,13の下方部は側面よりみて図2(B)のように互いに反対方向にずれるようクランク状に屈曲されている。
【0011】
上記各支持脚部13,13の上下部にはスプロケット14,15が軸着されており、これらスプロケット14,15間には無端状の主掘削刃16が巻回されている。この主掘削刃16は、上記スプロケット14,15の歯に係合して巻回されるチエン17と、このチエン17の外面に固着されたプレート17a,17a…に互いに位置をずらせて突設されたビット18,18…とからなっている。
【0012】
前記下部のスプロケット15は、油圧モータ19の回転フランジ20に固着されており、この回転フランジ20にはドラム型の副掘削刃21がその一側の取付座21aにより固着されており、この副掘削刃21の外周面には互いに位置を異にするビット22,22…を有している。そしてこの副掘削刃21内に前記の油圧モータ19が隠蔽されている。
【0013】
したがって上記支持脚部13,13の水平投影面は、竪穴の長方形断面に対応し、この竪穴の横幅方向一半部は主掘削刃16で、他半部は副掘削刃21で掘削することができる形態となり、下面からみたとき図6に示すように主掘削刃16,16と副掘削刃21,21とが互い違いにおかれた掘削装置を構成している。
【0014】
上記油圧モータ19を回転駆動するための油圧配管23,23はスライドポスト1内を通してスライドポスト1の上端から外部に導出されて作業機械2上の図示しない油圧機器に接続されている。
【0015】
上記スライドポスト1内にはセメントモルタル等の薬液注入用ホース24,24が配管され、その下端は図4に示すように支持脚部13の屈曲部13aに導かれ、その屈曲部13aの下端に開口する注出口25からスプロケット15と副掘削刃21との間の位置に注出されるようになっており、このホース24,24の上方部はスライドポスト1の上端から外部に導出されて図示しない薬液供給源に接続されている。
【0016】
前記上部のスプロケット14の軸26は、支持脚部13のガイド27にそって上下方向にスライド可能に支持された軸箱28に支持されており、この軸箱28は支持脚部13のフランジ部29に挿通するネジ軸30が固着され、前記フランジ部29に挿通する部分のネジ軸30に螺合されたナット31,31の回動操作により軸箱28を上下方向にスライドさせてスプロケット14,15の軸間距離、すなわち主掘削刃16のチエン17の張りを調整可能とされている。
【0017】
次に上記実施形態の作用を説明する。
【0018】
連続壁を造成する現場に作業機械2を移動させ、連続壁造成地点にスライドポスト1を吊り下ろして接地させたのち油圧配管23,23を通じ油圧モータ19に圧油を供給して下部のスプロケット15および副掘削刃21を回転駆動させると、主掘削刃16および副掘削刃21の各ビット18,22により地盤が掘削され、各支持脚部13,13の主、副掘削刃16,21,16,21の水平投影面に相当する面積がスライドポスト1の下降に支障をきたさぬよう掘削され、スライドポスト1を徐々に下降させることにより平面視において横長矩形状の竪穴が掘削される。
【0019】
上記掘削時にホース24,24を通じてセメントモルタル等の薬液を供給し、その注出口25,25から薬液を注出させる。この薬液は主、副掘削刃16,21の回転により掘削土砂と撹拌混練される。
【0020】
予定の深度まで掘削が進行したのちはワイヤ4を巻き上げてスライドポスト1を引き上げ、主、副掘削刃16,21を地上に引き上げる。この引き上げは緩速で行われ、必要により薬液の注出を継続する。
【0021】
1本の竪穴の掘削が完了したのち、ブーム13を旋回させて隣位の竪穴を上記竪穴と一部がラップするように前記と同様に竪穴を掘削し、こうして順次連続して施工することにより地中に連続壁が造成される。
【0022】
【発明の効果】
以上説明したように本発明によれば、掘削時に主掘削刃およびこれを支持するスライドポストには水平面内での回転トルクの反力が作用することがなく、そのためスライドポストを支持する支持体は比較的軽量かつ小型なものですみ、装置全体の構造を著しくコンパクトに構成し、しかも、一方の支持脚部の主掘削刃と他方の支持脚部の副掘削刃とが互い違いに隣り合うように配置したので、幅の狭い長方形断面の竪穴を掘り残しがなく、高能率に掘削することができる。
【図面の簡単な説明】
【図1】本発明による連続壁掘削機の全体構成例を示す掘削途上の側面図。
【図2】(A)〜(C)は本発明の主要部を示すもので、(A)は正面図、(B)は側面図、(C)は(B)のA−A矢視図。
【図3】図2における主掘削刃の一つを示す拡大正面図。
【図4】図3の縦断面図。
【図5】図3の背面図。
【図6】図2の下面拡大図。
【図7】図4のB−B矢視図。
【符号の説明】
1 スライドポスト
2 作業機械
3 ブーム(支持体)
4 ワイヤ
7 アーム
8 支持部
10 把持部材
12 シリンダ
13 支持脚部
14 上部のスプロケット
15 下部のスプロケット
16 主掘削刃
17 チエン
19 油圧モータ
21 副掘削刃
23 油圧配管
24 薬液注入用ホース
25 注出口
28 軸箱
30 ネジ軸
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a continuous wall excavator suitable for creating a continuous wall in the ground.
[0002]
[Prior art]
Conventionally, excavating the ground and creating a continuous wall at the excavation site has been performed. For excavation for creating such a continuous underground wall, conventionally, a plurality of excavation shafts hang down in parallel to the drive unit, and a row of pits is excavated by these digging shafts, and a part of the pits is wrapped. A method of forming a continuous column in the ground by forming a series of holes and thereby forming a continuous wall is widely known.
[0003]
[Problems to be solved by the invention]
However, the excavator used in the conventional method described above rotates the individual excavation shafts to drill the ground, so that a robust leader mast that supports the drive unit is required to receive the rotational reaction force of the excavation shafts. However, there is a problem that the entire apparatus has to be extremely large.
[0004]
[Means for Solving the Problems]
It is an object of the present invention to provide a continuous wall excavator capable of excavating a hole in the ground and creating a continuous wall without increasing the size of the apparatus. A slide post that can be moved up and down and suspended in a non-rotatable manner in a horizontal plane, and a drilling device that is provided at the lower end of the slide post and excavates a rectangular cross-sectional borehole, the drilling device is provided at the lower end of the slide post. A chain-shaped main excavating blade having endless turnable on one side thereof over substantially the entire length of the support leg, and having a bifurcated support leg formed. The lower edge of the main excavation blade and the drum-type sub excavation blade whose lower end edges substantially coincide with each other, and the main excavation blade of one support leg and the sub excavation blade of the other support leg are alternately arranged. It arrange | positions so that it may adjoin .
[0005]
Accordingly, the ground is drilled by lowering the slide post while rotationally driving the main drilling blade and the drum-type sub-excavation blade. At this time, since the reaction force of the rotational torque in the horizontal plane does not act on the main excavation blade and the slide post that supports it, the support body that supports the slide post can be relatively light and small. The structure can be made compact. In addition, since the auxiliary excavation blade excavates the range of the support leg portion, there is no leftover.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
The present invention will be described below with reference to embodiments shown in the drawings.
[0007]
FIG. 1 shows a side view of an overall configuration example of a continuous wall excavator according to the present invention, FIGS. 2 (A) and 2 (B) show the front and side of the main part, and FIG. 2 (C) shows FIG. ) Is shown by arrows AA.
[0008]
In the figure, the slide post 1 has a flat shape with arcs on both sides, and the upper end of the slide post 1 is suspended on the upper part of a boom 3 as a support of the work machine 2 via wires 4 and pulleys 5 and 6. The lower portion of the slide post 1 is supported by an arm 7 extending forward of the work machine 2 through a support portion 8 and supported in a non-rotating manner in a horizontal plane. It is adapted to move up and down along the support portion 8.
[0009]
As shown in FIGS. 2A and 2C, the support portion 8 has a base portion 10 b of the left and right gripping members 10 on the bearing portion 9 at the tip of the arm 7 in a horizontal plane by a common shaft 11. The ends of these gripping members 10 are pivotally supported so as to be gripped portions 10a and 10a having recesses fitted to the side edges of the slide post 1, and are fixed to the base portion 10b with bolts or the like (not shown). The front ends of the piston rods 12a and 12a of the cylinders 12 and 12 whose base portions are pivotally supported by the arm 7 are connected to the rear positions of the gripping portions 10a and 10a, and the piston rods 12a and 12a of the cylinders 12 and 12 are connected. With this operation, the gripping member 10 can be swiveled in a horizontal plane, and the head can be swung at the time of excavation at a corner portion.
[0010]
The lower end of the slide post 1 is bifurcated into support legs 13 and 13 as seen from the front as shown in FIG. 2A, and the lower portions of the support legs 13 and 13 are side surfaces. As shown in FIG. 2 (B), it is bent in a crank shape so as to be shifted in opposite directions.
[0011]
Sprockets 14 and 15 are attached to the upper and lower portions of the support leg portions 13 and 13, and an endless main excavation blade 16 is wound between the sprockets 14 and 15. The main excavation blade 16 is projected from a chain 17 that is wound around the sprockets 14 and 15 and plates 17a, 17a,. Bits 18, 18...
[0012]
The lower sprocket 15 is fixed to a rotating flange 20 of a hydraulic motor 19, and a drum-type auxiliary excavating blade 21 is fixed to the rotating flange 20 by a mounting seat 21a on one side thereof. The outer peripheral surface of the blade 21 has bits 22, 22. The hydraulic motor 19 is concealed in the auxiliary excavation blade 21.
[0013]
Accordingly, the horizontal projection plane of the support legs 13, 13 corresponds to the rectangular cross section of the borehole, and one half of the borehole in the lateral width direction can be excavated by the main excavation blade 16 and the other half can be excavated by the auxiliary excavation blade 21. As shown in FIG. 6, the main excavation blades 16 and 16 and the sub excavation blades 21 and 21 constitute an excavation device in which the main excavation blades 21 and 21 are arranged alternately.
[0014]
The hydraulic pipes 23 and 23 for rotationally driving the hydraulic motor 19 are led out from the upper end of the slide post 1 through the slide post 1 and connected to a hydraulic device (not shown) on the work machine 2.
[0015]
In the slide post 1, chemical injection hoses 24 and 24 such as cement mortar are piped, and the lower ends thereof are guided to the bent portion 13a of the support leg portion 13 as shown in FIG. The spout 15 is opened from the opening 25 to a position between the sprocket 15 and the auxiliary excavation blade 21. The upper portions of the hoses 24, 24 are led out from the upper end of the slide post 1 and are not shown. Connected to chemical supply source.
[0016]
The shaft 26 of the upper sprocket 14 is supported by a shaft box 28 supported so as to be slidable in the vertical direction along the guide 27 of the support leg 13, and the shaft box 28 is supported by the flange portion of the support leg 13. The screw shaft 30 inserted through the flange 29 is fixed, and the shaft box 28 is slid up and down by rotating the nuts 31, which are screwed into the screw shaft 30 of the portion inserted through the flange portion 29. The distance between the 15 axes, that is, the tension of the chain 17 of the main excavating blade 16 can be adjusted.
[0017]
Next, the operation of the above embodiment will be described.
[0018]
The work machine 2 is moved to the site where the continuous wall is created, the slide post 1 is suspended at the site where the continuous wall is created and grounded, and then pressure oil is supplied to the hydraulic motor 19 through the hydraulic pipes 23 and 23 to form the lower sprocket 15. When the sub-excavation blade 21 is driven to rotate, the ground is excavated by the bits 18 and 22 of the main excavation blade 16 and the sub-excavation blade 21, and the main and sub-excavation blades 16, 21, 16 of the support leg portions 13, 13 are excavated. , 21 is excavated so as not to hinder the lowering of the slide post 1, and by gradually lowering the slide post 1, a horizontally elongated rectangular hole is excavated in plan view.
[0019]
During the excavation, a chemical solution such as cement mortar is supplied through the hoses 24 and 24, and the chemical solution is discharged from the outlets 25 and 25. This chemical solution is agitated and kneaded with the excavated sediment by the rotation of the main and auxiliary excavating blades 16 and 21.
[0020]
After the excavation has progressed to a predetermined depth, the wire 4 is wound up, the slide post 1 is pulled up, and the main and auxiliary drilling blades 16 and 21 are pulled up to the ground. This pull-up is performed at a slow speed, and the chemical solution is continuously dispensed as necessary.
[0021]
After the excavation of one pothole is completed, the boom 13 is swung to excavate the pothole in the same manner as described above so that the adjacent pothole partially wraps with the pothole, and thus, successively constructed A continuous wall is created in the ground.
[0022]
【The invention's effect】
As described above, according to the present invention, the reaction force of the rotational torque in the horizontal plane does not act on the main excavation blade and the slide post that supports the main excavation blade during excavation. It is relatively light and small, and the overall structure of the device is extremely compact, and the main drilling blade of one support leg and the auxiliary drilling blade of the other support leg are adjacent to each other alternately. Since it is arranged, there is no left- over digging hole with a narrow rectangular cross section, and it can be excavated with high efficiency.
[Brief description of the drawings]
FIG. 1 is a side view of a continuous wall excavator according to the present invention showing an example of the entire configuration.
FIGS. 2A to 2C show the main part of the present invention, FIG. 2A is a front view, FIG. 2B is a side view, and FIG. 2C is a view taken along the line AA in FIG. .
FIG. 3 is an enlarged front view showing one of the main excavation blades in FIG. 2;
4 is a longitudinal sectional view of FIG. 3;
5 is a rear view of FIG. 3. FIG.
6 is an enlarged bottom view of FIG. 2. FIG.
7 is a BB arrow view of FIG.
[Explanation of symbols]
1 Slide post 2 Work machine 3 Boom (support)
4 Wire 7 Arm 8 Supporting part 10 Holding member 12 Cylinder 13 Supporting leg part 14 Upper sprocket 15 Lower sprocket 16 Main excavating blade 17 Chain 19 Hydraulic motor 21 Sub excavating blade 23 Hydraulic piping 24 Chemical solution injection hose 25 Outlet 28 Axis Box 30 Screw shaft

Claims (1)

作業現場に立設する支持体に昇降自在でかつ水平面内で回転不能に吊下されたスライドポストと、このスライドポストの下端に設けられ長方形断面の竪穴を掘削する掘削装置とを備え、この掘削装置は、前記スライドポストの下端に形成された2又状の支持脚部を有し、前記それぞれの支持脚部には該支持脚部の略全長にわたってその一側部に無端回動自在とされたチエン状の主掘削刃と、この主掘削刃の下端縁と下端縁が略一致するドラム型の副掘削刃とが並設され、かつ一方の支持脚部の主掘削刃と他方の支持脚部の副掘削刃とが互い違いに隣り合うように配置したことを特徴とする連続壁掘削機。This excavator comprises a slide post that is freely raised and lowered on a support that is erected on a work site and that is non-rotatable in a horizontal plane, and an excavator that excavates a rectangular cross-sectional borehole provided at the lower end of the slide post. The apparatus has a bifurcated support leg portion formed at the lower end of the slide post, and each of the support leg portions is endlessly rotatable at one side thereof over substantially the entire length of the support leg portion. A main drilling blade in the form of a chain and a drum-type secondary drilling blade whose lower end edge and lower end edge substantially coincide with each other, and the main drilling blade of one support leg and the other support leg A continuous wall excavator characterized in that the sub-excavation blades of the section are alternately arranged adjacent to each other .
JP08384496A 1996-04-05 1996-04-05 Continuous wall excavator Expired - Fee Related JP3660048B2 (en)

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Application Number Priority Date Filing Date Title
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JP3660048B2 true JP3660048B2 (en) 2005-06-15

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CN106930279A (en) * 2017-04-02 2017-07-07 刘玉兴 A kind of plate connects buckle pile making apparatus
CN106930270A (en) * 2017-04-02 2017-07-07 刘玉兴 A kind of embodiment of dumbbell interlocking piles
CN108999575B (en) * 2017-05-12 2022-04-22 周兆弟 Soil body fully-stirring type chain type drill bit with auxiliary cutting assembly

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108868629A (en) * 2017-05-12 2018-11-23 周兆弟 Type chain broaching is sufficiently stirred in the soil body

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106930279A (en) * 2017-04-02 2017-07-07 刘玉兴 A kind of plate connects buckle pile making apparatus
CN106930270A (en) * 2017-04-02 2017-07-07 刘玉兴 A kind of embodiment of dumbbell interlocking piles
CN108999575B (en) * 2017-05-12 2022-04-22 周兆弟 Soil body fully-stirring type chain type drill bit with auxiliary cutting assembly

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