JP3612684B2 - Double rotating shaft type ground mixing and processing equipment - Google Patents
Double rotating shaft type ground mixing and processing equipment Download PDFInfo
- Publication number
- JP3612684B2 JP3612684B2 JP24025399A JP24025399A JP3612684B2 JP 3612684 B2 JP3612684 B2 JP 3612684B2 JP 24025399 A JP24025399 A JP 24025399A JP 24025399 A JP24025399 A JP 24025399A JP 3612684 B2 JP3612684 B2 JP 3612684B2
- Authority
- JP
- Japan
- Prior art keywords
- rotating shaft
- soil
- stirring
- shaft type
- type ground
- 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
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Images
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- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Description
【0001】
【発明が属する技術分野】
本発明は、二重回転軸式地盤攪拌混合処理装置に関するものである。
【0002】
【従来の技術】
内外両軸の各下端部に突設した攪拌翼を互いに反対方向に回転させて地盤土壌と地盤改良材とを攪拌混合するようにした二重回転軸式地盤攪拌混合処理装置は従来公知であるが、その内外両軸の攪拌翼間の上下の間隔について特に考慮したものは知られていない。
【0003】
【発明が解決しようとする課題】
本発明が解決しようとする課題(本発明の目的)は、前述の内外両軸の攪拌翼間の上下の間隔を特定して攪拌混合効果を格段に向上させるようにした二重回転軸式地盤攪拌混合処理装置を提供することにある。
【0004】
【課題を解決するための手段】
前記課題を解決するために、本発明の二重回転軸式地盤攪拌混合処理装置(以下、単に本発明の装置という)では、互いに反対方向に回転する内外両軸の攪拌翼間の上下の間隔が前記式(1)を満足するようにしている。
【0005】
【発明の実施の形態】
本発明の装置における回転軸の要部を示す図1,図2において、1は回転軸の外軸、2は同じく内軸であり、外軸1は、例えば、ターンテーブル方式で、また、内軸2は、例えば、上端に取り付けたモータで、互いに反対方向に回転されるようになっている。
【0006】
外軸1の下端部と、外軸1を貫通してその下方に突出した内軸の下端部には、それぞれ、攪拌翼3,4が放射方向に突設され、また、攪拌翼3,4の近傍にはセメントミルク等の地盤改良材の吐出口(図示しない)が設けられ、回転軸の地中貫入時と引き抜き時に、互いに反対方向に回転する攪拌翼3,4で、地盤土壌と前記吐出口から吐出される地盤改良材を攪拌混合するようになっている。
【0007】
一般的に知られている塑性変形に基づく支持力論を適用して、攪拌翼が地盤中で水平方向に回動するときに、その前面に土の楔5ができ、この楔5で回動方向前方の土が上下にそれぞれ振り分けられて図3に示すように移動すると考えた場合、原地盤土壌は粘性土地盤では内部摩擦角が殆ど0に近い土と考えられるので、楔5の底角αは45°となり、上下にそれぞれ移動する土の巾Wは
【数2】
になると考えられ、この際の土の動きは、例えば、楔5の頂点より下側にあった土は、楔5の1辺を半径とする円弧に沿って、当初は下方に押しやられ、順次攪拌翼の後方へと追いやられるような動きとなる。
【0008】
図4は、外軸1の攪拌翼3と内軸2の攪拌翼4が反対方向に回転する際の、攪拌翼3の前方の土の下方への動きと攪拌翼4の前方の土の上方への動きを示しているが、攪拌翼3,4間の上下方向の間隔Sが
【数3】
の場合(SがW1とW2の和より大きい場合)は、攪拌翼3,4が大きく上下に離れ過ぎていて、攪拌翼3が土を下方に押しやる巾と攪拌翼4が土を上方に押しやる巾とが相互に重ならないため、攪拌翼3,4を逆回転させることの効果が得られない。
【0009】
また、間隔Sが
【数4】
の場合(SがW1とW2の最大のものより小さい場合)は、攪拌翼3が土を下方に押しやろうとする力、或いは、攪拌翼4が土を上方に押しやろうとする力が、相手側攪拌翼に当たることで減殺されるため、攪拌翼3,4を逆回転させることの効果が減少する。
【0010】
これに対して、間隔Sが前記式(1)を満足している本発明の装置の場合(Sが、W1とW2の最大のものに等しいかそれよりも大きく、W1とW2の和に等しいかそれよりも小さい場合)は、攪拌翼3が土を下方に押しやる巾と攪拌翼4が土を上方に押しやる巾とが相互に重なり、下方への土の動きと上方への土の動きとがぶつかりあって、土が複雑な動きをすることになるので、攪拌翼3,4を逆回転させることの効果が十分に発揮され、上下の土同士、および、土と地盤改良材との攪拌混合効果が著しく向上する。
【図面の簡単な説明】
【図1】本発明の装置における回転軸の要部の正面図である。
【図2】同じく側面図である。
【図3】攪拌翼による土の移動の基本的説明図である。
【図4】本発明の装置における上下の攪拌翼による土の移動の状態図である。
【符号の説明】
1:外軸、2:内軸、3:攪拌翼、4:攪拌翼、5:楔。[0001]
[Technical field to which the invention belongs]
The present invention relates to a double-rotating shaft type ground stirring and mixing apparatus.
[0002]
[Prior art]
2. Description of the Related Art A double rotating shaft type ground agitating and mixing apparatus in which agitating blades projecting at lower ends of both inner and outer shafts are rotated in opposite directions to agitate and mix ground soil and ground improvement material is conventionally known. However , no particular consideration is given to the vertical distance between the stirring blades on both the inner and outer shafts.
[0003]
[Problems to be solved by the invention]
The problem to be solved by the present invention (the object of the present invention) is to provide a double rotating shaft type ground which can significantly improve the stirring and mixing effect by specifying the vertical distance between the stirring blades of the aforementioned inner and outer shafts An object of the present invention is to provide a stirring and mixing apparatus.
[0004]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, in the double rotating shaft type ground stirring and mixing apparatus of the present invention (hereinafter simply referred to as the apparatus of the present invention), the vertical distance between the stirring blades of the inner and outer shafts rotating in opposite directions to each other Satisfies the formula (1).
[0005]
DETAILED DESCRIPTION OF THE INVENTION
1 and 2 showing the main part of the rotating shaft in the apparatus of the present invention, 1 is an outer shaft of the rotating shaft, 2 is an inner shaft, and the
[0006]
At the lower end of the
[0007]
Applying the generally known support force theory based on plastic deformation, when the stirring blade rotates in the horizontal direction in the ground, a
The movement of the soil at this time is, for example, the soil below the apex of the
[0008]
FIG. 4 shows the downward movement of the soil in front of the stirring blade 3 and the top of the soil in front of the
In the case of (S is greater than the sum of W1 and W2), the
[0009]
Also, the interval S is
(S is smaller than the maximum of W1 and W2), the force that the stirring blade 3 tries to push the soil downward or the force that the stirring
[0010]
On the other hand, in the case of the device of the present invention in which the distance S satisfies the formula (1) (S is equal to or greater than the maximum of W1 and W2, and is equal to the sum of W1 and W2 Or smaller), the width of the stirring blade 3 pushing the soil downward and the width of the
[Brief description of the drawings]
FIG. 1 is a front view of a main part of a rotating shaft in an apparatus of the present invention.
FIG. 2 is a side view of the same.
FIG. 3 is a basic explanatory view of soil movement by a stirring blade.
FIG. 4 is a state diagram of soil movement by upper and lower stirring blades in the apparatus of the present invention.
[Explanation of symbols]
1: outer shaft, 2: inner shaft, 3: stirring blade, 4: stirring blade, 5: wedge.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP24025399A JP3612684B2 (en) | 1999-07-24 | 1999-07-24 | Double rotating shaft type ground mixing and processing equipment |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP24025399A JP3612684B2 (en) | 1999-07-24 | 1999-07-24 | Double rotating shaft type ground mixing and processing equipment |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2001032262A JP2001032262A (en) | 2001-02-06 |
JP3612684B2 true JP3612684B2 (en) | 2005-01-19 |
Family
ID=17056748
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP24025399A Expired - Fee Related JP3612684B2 (en) | 1999-07-24 | 1999-07-24 | Double rotating shaft type ground mixing and processing equipment |
Country Status (1)
Country | Link |
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JP (1) | JP3612684B2 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR101731253B1 (en) * | 2015-08-06 | 2017-04-28 | 이서영 | The churner for a polyethylene and birse |
-
1999
- 1999-07-24 JP JP24025399A patent/JP3612684B2/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
JP2001032262A (en) | 2001-02-06 |
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