JP2002332631A - Ground improvement device - Google Patents
Ground improvement deviceInfo
- Publication number
- JP2002332631A JP2002332631A JP2001137660A JP2001137660A JP2002332631A JP 2002332631 A JP2002332631 A JP 2002332631A JP 2001137660 A JP2001137660 A JP 2001137660A JP 2001137660 A JP2001137660 A JP 2001137660A JP 2002332631 A JP2002332631 A JP 2002332631A
- Authority
- JP
- Japan
- Prior art keywords
- stirring blade
- shaft
- solidified material
- soil
- face
- 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
Landscapes
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、地盤改良装置に関
する。TECHNICAL FIELD The present invention relates to a ground improvement device.
【０００２】[0002]
【従来の技術】従来、地盤改良装置の一形態として、内
側軸と外側軸とを内外側二重軸に形成すると共に、両内
・外側軸を相互に逆回転可能となした掘削軸体と、同掘
削軸体に、内側撹拌翼と外側撹拌翼とを内外側位置にて
相対的に逆回転させるべく取り付けた相対撹拌翼体と、
掘削軸体に設けて固化材を吐出する固化材吐出部とを具
備するものがある。2. Description of the Related Art Conventionally, as one form of a ground improvement apparatus, an excavation shaft body in which an inner shaft and an outer shaft are formed as inner and outer shafts and both inner and outer shafts can be rotated in opposite directions to each other. A relative stirring blade body attached to the excavation shaft so as to relatively rotate the inner stirring blade and the outer stirring blade relatively at the inner and outer positions,
There is an apparatus provided with an excavating shaft body and a solidified material discharge section for discharging the solidified material.
【０００３】そして、内・外側撹拌翼は、それぞれ掘削
軸体の半径方向に張り出し状に伸延する上下一対の上・
下部横翼片と、両上・下部横翼片の外側端部間に上下方
向に伸延させて介設した縦翼片とから弧状に形成してい
る。[0003] The inner and outer stirring blades each have a pair of upper and lower upper and lower blades extending in the radial direction of the excavating shaft body.
It is formed in an arc shape from a lower horizontal wing piece and a vertical wing piece extended vertically and interposed between outer ends of both upper and lower horizontal wing pieces.
【０００４】このようにして、かかる地盤改良装置で
は、掘削軸体により地盤を掘削しながら、内・外側撹拌
翼を相対的に逆回転させると共に、固化材吐出部より固
化材を吐出させることにより、掘削土壌を撹拌しながら
固化材と混練させるようにしている。In this way, in such a ground improvement apparatus, while excavating the ground with the excavation shaft, the inner and outer stirring blades are relatively rotated in the opposite direction, and the solidified material is discharged from the solidified material discharge section. The excavated soil is kneaded with the solidified material while stirring.
【０００５】[0005]
【発明が解決しようとする課題】ところが、上記した地
盤改良装置では、内・外側撹拌翼の横断面幅が中央部か
ら回転方向側の端面まで略同一幅に形成されているた
め、外側撹拌翼と内側撹拌翼との相対撹拌により土壌は
掘削されるものの、土壌が、例えば、強粘土の場合、各
内・外側撹拌翼の回転方向側の端面に付着して土塊状と
なり、外側撹拌翼と内側撹拌翼との間で充分に撹拌され
ない上に、固化材とも満遍なく混練されることがなく、
その結果、改良土壌の品質を良好に確保できないという
不具合がある。However, in the above-mentioned ground improvement apparatus, since the cross-sectional widths of the inner and outer stirring blades are formed to be substantially the same width from the central portion to the end surface on the rotation direction side, the outer stirring blades are formed. Although the soil is excavated by the relative agitation of the inner agitator and the inner agitator, for example, in the case of strong clay, the soil adheres to the end face on the rotation direction side of each inner / outer agitator to form a clump of soil, and In addition to being not sufficiently stirred with the inner stirring blade, it is not evenly kneaded with the solidified material,
As a result, there is a problem that the quality of the improved soil cannot be ensured satisfactorily.
【０００６】また、外側撹拌翼の上・下部横翼片は、そ
れぞれ掘削軸体の軸線と略直交する半径方向に伸延させ
ているために、土壌の掘削・撹拌後に内・外側撹拌翼を
引き上げる際に、これら内・外側撹拌翼の直上方に形成
されるブリッジ（いわゆる、ジャーミング）が大きな負
荷となって作用し、かかる引き上げ作業がスムーズに行
えないという不具合がある。Further, since the upper and lower lateral blade pieces of the outer stirring blade are respectively extended in the radial direction substantially orthogonal to the axis of the excavating shaft, the inner and outer stirring blades are pulled up after excavating and stirring the soil. In this case, a bridge (so-called "germing") formed directly above the inner and outer stirring blades acts as a large load, and there is a problem that such a lifting operation cannot be performed smoothly.
【０００７】特に、締まった砂質土（含水比が小さい細
砂若しくは微細砂）や粘着力に富んだ粘性土地盤の場
合、負荷が大きいために、地盤改良作業能率上、大きな
支障となっている。Particularly, in the case of compacted sandy soil (fine sand or fine sand having a small water content) or viscous soil with high adhesive strength, the load is large, and this greatly hinders the efficiency of soil improvement work. I have.
【０００８】[0008]
【課題を解決するための手段】そこで、本発明では、内
側軸と外側軸とを内外側二重軸に形成すると共に、両内
・外側軸を相互に逆回転可能となした掘削軸体と、同掘
削軸体に、内側撹拌翼と外側撹拌翼とを内外側位置にて
相対的に逆回転させるべく取り付けた相対撹拌翼体とを
具備し、内側撹拌翼と外側撹拌翼の少なくともいずれか
一方に、固化材を吐出する固化材吐出部を設けた地盤改
良装置において、外側撹拌翼は、両端部を掘削軸体に取
り付けると共に、中途部を外方に膨出させた弧状に形成
すると共に、横断面幅を中央部から回転方向側の端面に
向けて漸次細幅に形成して、内側面をテーパー面となし
たことを特徴とする地盤改良装置を提供するものであ
る。Therefore, according to the present invention, an inner shaft and an outer shaft are formed as inner and outer double shafts, and an inner and outer shaft is excavated in such a manner that both inner and outer shafts can rotate in opposite directions. The excavating shaft further includes a relative stirring blade attached to the inner stirring blade and the outer stirring blade for relatively rotating the inner stirring blade at the inner and outer positions, and at least one of the inner stirring blade and the outer stirring blade. On the other hand, in a ground improvement device provided with a solidified material discharge portion for discharging solidified material, the outer stirring blades are attached to the excavation shaft body at both ends, and formed in an arc shape with a middle portion bulging outward. The ground improvement device is characterized in that the width of the cross section is gradually reduced from the center toward the end face on the rotation direction side, and the inner surface is a tapered surface.
【０００９】また、本発明は、次の構成にも特徴を有す
る。The present invention also has the following configuration.
【００１０】内側撹拌翼は、両端部を掘削軸体に取り
付けると共に、中途部を外方に膨出させた弧状に形成す
ると共に、横断面幅を中央部から回転方向側の端面に向
けて漸次細幅に形成して、内側面をテーパー面となした
こと。[0010] The inner stirring blade has both ends attached to the excavating shaft, and an intermediate portion formed in an arc shape bulging outward, and the cross-sectional width gradually increases from the center toward the end face on the rotation direction side. Formed with a narrow width and tapered inner surface.
【００１１】内側撹拌翼は、両端部を掘削軸体に取り
付けると共に、中途部を外方に膨出させた弧状に形成す
ると共に、横断面幅を中央部から回転方向側の端面に向
けて漸次細幅に形成して、外側面をテーパー面となした
こと。[0011] The inner stirring blade has both ends attached to the excavating shaft body, the middle part is formed in an arc shape bulging outward, and the cross-sectional width gradually increases from the center toward the end face on the rotation direction side. Formed with a narrow width and the outer surface is tapered.
【００１２】内側軸と外側軸とを内外側二重軸に形成
すると共に、両内・外側軸を相互に逆回転可能となした
掘削軸体と、同掘削軸体に、内側撹拌翼と外側撹拌翼と
を内外側位置にて相対的に逆回転させるべく取り付けた
相対撹拌翼体とを具備し、内側撹拌翼と外側撹拌翼の少
なくともいずれか一方に、固化材を吐出する固化材吐出
部を設けた地盤改良装置において、外側撹拌翼は、掘削
軸体の半径方向に張り出し状に伸延する上下一対の上・
下部横翼片と、両上・下部横翼片の外側端部間に上下方
向に伸延させて介設した縦翼片とから弧状に形成すると
共に、上部横翼片は、掘削軸体の軸線と直交する水平線
よりも下方へ向けて下り傾斜状となす一方、下部横翼片
は、掘削軸体の軸線と直交する水平線よりも上方へ向け
て上り傾斜状となし、かつ、下り傾斜状となした上部横
翼片の俯角は、上り傾斜状となした下部横翼片の仰角よ
りも大となしたこと。An inner shaft and an outer shaft are formed as inner and outer shafts, and the inner and outer shafts are rotatable with respect to each other. A relative stirring blade body attached to rotate the stirring blades relatively at inner and outer positions, and a solidified material discharge unit configured to discharge a solidified material to at least one of the inner stirring blade and the outer stirring blade. In the ground improvement device provided with the above, the outer stirring blade is a pair of upper and lower upper and lower extending in the radial direction of the excavating shaft in a projecting manner.
The lower horizontal wing piece and the vertical wing piece extended vertically and interposed between the outer ends of the upper and lower horizontal wing pieces are formed in an arc shape, and the upper horizontal wing piece is the axis of the excavating shaft body. And the lower horizontal blade piece is upwardly inclined above the horizontal line orthogonal to the axis of the excavating shaft, and is downwardly inclined. The angle of depression of the upper horizontal wing piece made is larger than the elevation angle of the lower horizontal wing piece made uphill.
【００１３】[0013]
【発明の実施の形態】以下に、本発明の実施の形態につ
いて説明する。Embodiments of the present invention will be described below.
【００１４】すなわち、本発明に係る地盤改良装置は、
基本的構造として、内側軸と外側軸とを内外側二重軸に
形成すると共に、両内・外側軸を相互に逆回転可能とな
した掘削軸体と、同掘削軸体に、内側撹拌翼と外側撹拌
翼とを内外側位置にて相対的に逆回転させるべく取り付
けた相対撹拌翼体とを具備し、内側撹拌翼と外側撹拌翼
の少なくともいずれか一方に、固化材を吐出する固化材
吐出部を設けている。That is, the ground improvement apparatus according to the present invention comprises:
As a basic structure, an inner shaft and an outer shaft are formed as inner and outer double shafts, and both inner and outer shafts are capable of rotating in opposite directions to each other. And a relative stirring blade attached to rotate the outer stirring blades relatively at the inner and outer positions, and a solidified material that discharges the solidified material to at least one of the inner stirring blades and the outer stirring blades An ejection unit is provided.
【００１５】このようにして、本発明に係る地盤改良装
置により地盤、特に軟弱地盤の改良を行う際には、軟弱
地盤上に掘削軸体を建て込み、同掘削軸体をその軸線廻
りに回転させながら軟弱地盤を掘削して、同軟弱地盤中
を下方へ向けて掘進させると共に、掘削軸体に取り付け
た内・外側撹拌翼を、内外側で重複するオーバーラップ
状態にて相対的に逆回転（相互に反対方向に回転）させ
ることにより、大きな撹拌容積にて掘削土壌を撹拌する
ことができる。As described above, when the ground, particularly the soft ground, is improved by the ground improvement apparatus according to the present invention, the excavation shaft is built on the soft ground, and the excavation shaft is rotated around its axis. The soft ground is excavated while being made to excavate in the soft ground downward, and the inner and outer stirring blades attached to the excavation shaft are relatively reversely rotated in the overlapping state where the inner and outer stirring blades overlap. (Rotating in opposite directions to each other), the excavated soil can be stirred with a large stirring volume.
【００１６】しかも、内側撹拌翼と外側撹拌翼は、略相
似形に形成して、両撹拌翼間に形成される間隙を、両撹
拌翼のほぼ全域にわたってほぼ等しい幅員となすことに
より、掘削土壌の共回り現象を防止することができると
共に、緻密な撹拌機能を発揮させることができる。In addition, the inner stirring blade and the outer stirring blade are formed to have substantially similar shapes, and the gap formed between the two stirring blades is made to have substantially the same width over almost the entire area of both the stirring blades. Can be prevented, and a fine stirring function can be exhibited.
【００１７】すなわち、一方の撹拌翼だけを回転させた
場合には、掘削土壌が、同撹拌翼に引きずられて全体的
に回転するだけで、土塊が圧搾された状態にて残存する
が、互いに内外側に重複状態の内・外側撹拌翼を相互に
反対方向に回転させることにより、両撹拌翼間の掘削土
壌が反対方向の流動を強制されて、必然的に掘削土壌が
撹拌翼間で交錯してもみ合い、掘削土壌を均一に混練さ
せることができる。That is, when only one of the stirring blades is rotated, the excavated soil is dragged by the stirring blades and rotates as a whole, and the soil mass remains in a compressed state. By rotating the inner and outer stirring blades in the inner and outer sides in opposite directions, the excavated soil between the two stirring blades is forced to flow in the opposite direction, and the excavated soil is naturally mixed between the stirring blades. It is possible to mix and excavate soil uniformly.
【００１８】しかも、内側撹拌翼と外側撹拌翼の少なく
ともいずれか一方に、固化材を吐出する固化材吐出部を
設けている。In addition, at least one of the inner stirring blade and the outer stirring blade is provided with a solidified material discharge section for discharging the solidified material.
【００１９】このようにして、掘削軸体の回りを回転す
る少なくとも一方の撹拌翼に固化材吐出部を設けること
により、必然的に撹拌翼間で交錯してもみ合い、均一に
混練される掘削土壌中に、固化材吐出部より固化材を吐
出させることができるため、掘削土壌と固化材とを効率
良く均一に混練させることができる。By providing the solidified material discharge portion on at least one of the stirring blades rotating around the excavating shaft in this manner, the mixing blades inevitably cross each other and are uniformly kneaded. Since the solidified material can be discharged from the solidified material discharge portion, the excavated soil and the solidified material can be efficiently and uniformly kneaded.
【００２０】そして、本発明では、特徴的構造として、
外側撹拌翼は、両端部を掘削軸体に取り付けると共に、
中途部を外方に膨出させた弧状に形成すると共に、横断
面幅を中央部から回転方向側の端面に向けて漸次細幅に
形成して、内側面をテーパー面となしている。In the present invention, as a characteristic structure,
The outer stirring blades are attached to the excavation shaft at both ends,
The middle portion is formed in an arc shape bulging outward, and the width of the cross section is gradually reduced from the center portion toward the end surface on the rotation direction side, and the inner surface is formed as a tapered surface.
【００２１】このようにして、外側撹拌翼の回転方向側
の端面により土壌を掘削すると共に、掘削した土壌をテ
ーパー面に沿わせて内側撹拌翼側へスムーズに案内する
ことができるようにしている。In this manner, the soil is excavated by the end face of the outer stirring blade on the rotation direction side, and the excavated soil can be smoothly guided to the inner stirring blade side along the tapered surface.
【００２２】この際、外側撹拌翼の回転方向側の端面は
細幅に形成しているため、土壌の掘削が円滑かつ確実に
行えると共に、同端面には掘削土壌が付着されることな
く内側面のテーパー面に沿って内側撹拌翼側に案内され
る。At this time, since the end face on the rotation direction side of the outer stirring blade is formed to be narrow, the excavation of the soil can be performed smoothly and reliably, and the excavated soil does not adhere to the inner face without being attached to the end face. Is guided to the inner stirring blade side along the tapered surface of.
【００２３】その結果、外側撹拌翼により掘削された土
壌と、内側撹拌翼により掘削された土壌とを相対的に逆
回転させながら効率良く撹拌させることができ、掘削土
壌が強粘土質の場合も、同掘削土壌が土塊状となるのを
防止しながら、同掘削土壌と固化材とを効率良く均一に
混練させることができる。As a result, the soil excavated by the outer stirring blades and the soil excavated by the inner stirring blades can be efficiently stirred while being relatively rotated in the reverse direction. In addition, the excavated soil and the solidified material can be efficiently and uniformly kneaded while preventing the excavated soil from being formed into a mass of soil.
【００２４】また、内側撹拌翼は、両端部を掘削軸体に
取り付けると共に、中途部を外方に膨出させた弧状に形
成すると共に、横断面幅を中央部から回転方向側の端面
に向けて漸次細幅に形成して、内側面をテーパー面とな
している。[0024] The inner stirring blade has both ends attached to the excavating shaft, and an intermediate portion formed in an arc shape with a bulging outward, and a cross-sectional width extending from the center to the end face on the rotation direction side. The inner surface is a tapered surface.
【００２５】このようにして、内側撹拌翼の回転方向側
の端面により土壌を掘削すると共に、掘削した土壌をテ
ーパー面に沿わせて掘削軸体側へスムーズに案内するこ
とができるようにしている。Thus, the soil is excavated by the end face of the inner stirring blade on the rotation direction side, and the excavated soil can be smoothly guided to the excavation shaft along the tapered surface.
【００２６】この際、内側撹拌翼の回転方向側の端面は
細幅に形成しているため、土壌の掘削が円滑かつ確実に
行えると共に、同端面には掘削土壌が付着されることな
く内側面のテーパー面に沿って掘削土壌が掘削軸体側に
案内される。At this time, since the end face on the rotation direction side of the inner stirring blade is formed to be narrow, the excavation of the soil can be carried out smoothly and reliably, and the excavated soil is not adhered to the end face. The excavated soil is guided to the excavation shaft side along the tapered surface of.
【００２７】その結果、掘削土壌が強粘土質の場合も、
同掘削土壌が土塊状となるのを防止しながら、同掘削土
壌と固化材とを効率良く均一に混練させることができ
る。As a result, even when the excavated soil is a strong clay,
The excavated soil and the solidified material can be efficiently and uniformly kneaded while preventing the excavated soil from being formed into a mass of soil.
【００２８】また、内側撹拌翼は、両端部を掘削軸体に
取り付けると共に、中途部を外方に膨出させた弧状に形
成すると共に、横断面幅を中央部から回転方向側の端面
に向けて漸次細幅に形成して、外側面をテーパー面とな
している。The inner stirring blade has both ends attached to the excavating shaft body, the middle part is formed in an arc shape bulging outward, and the cross-sectional width is directed from the center to the end face on the rotation direction side. The outer surface is tapered.
【００２９】このようにして、内側撹拌翼の回転方向側
の端面により土壌を掘削すると共に、掘削した土壌をテ
ーパー面に沿わせて外側撹拌翼側へスムーズに案内する
ことができるようにしている。Thus, the soil is excavated by the end face of the inner stirring blade on the rotation direction side, and the excavated soil can be smoothly guided to the outer stirring blade side along the tapered surface.
【００３０】この際、内側撹拌翼の回転方向側の端面は
細幅に形成しているため、土壌の掘削が円滑かつ確実に
行えると共に、同端面には掘削土壌が付着されることな
く外側面のテーパー面に沿って掘削土壌が外側撹拌翼側
に案内される。At this time, since the end face on the rotation direction side of the inner stirring blade is formed to be narrow, the excavation of the soil can be performed smoothly and securely, and the excavated soil is not adhered to the end face. The excavated soil is guided to the outer stirring blade side along the tapered surface of.
【００３１】その結果、掘削土壌が強粘土質の場合も、
同掘削土壌が土塊状となるのを防止しながら、内・外側
撹拌翼間にて掘削土壌と固化材とを効率良く均一に混練
させることができる。As a result, even when the excavated soil is a strong clay,
The excavated soil and the solidified material can be efficiently and uniformly kneaded between the inner and outer stirring blades while preventing the excavated soil from being formed into a soil mass.
【００３２】また、外側撹拌翼は、掘削軸体の半径方向
に張り出し状に伸延する上下一対の上・下部横翼片と、
両上・下部横翼片の外側端部間に上下方向に伸延させて
介設した縦翼片とから弧状に形成すると共に、上部横翼
片は、掘削軸体の軸線と直交する水平線よりも下方へ向
けて下り傾斜状となす一方、下部横翼片は、掘削軸体の
軸線と直交する水平線よりも上方へ向けて上り傾斜状と
なし、かつ、下り傾斜状となした上部横翼片の俯角は、
上り傾斜状となした下部横翼片の仰角よりも大となして
いる。The outer stirring blade includes a pair of upper and lower upper and lower horizontal blades extending in a protruding shape in the radial direction of the excavating shaft.
The upper horizontal wing piece is formed in an arc shape from the vertical wing piece extended vertically and interposed between the outer ends of both upper and lower horizontal wing pieces, and the upper horizontal wing piece is more than a horizontal line orthogonal to the axis of the excavating shaft body. The lower horizontal wing piece is downwardly inclined while the lower horizontal wing piece is upwardly sloping upward than a horizontal line perpendicular to the axis of the excavating shaft body, and the upper horizontal wing piece is downwardly sloping. The depression angle of
The angle of elevation is larger than the angle of elevation of the lower horizontal wing piece that is inclined upward.
【００３３】このようにして、土壌の掘削・撹拌後に
は、内・外側撹拌翼を、掘削回転方向とは反対方向に回
転させながら引き上げることができ、この際、これら内
・外側撹拌翼の直上方にブリッジ（いわゆる、ジャーミ
ング）が形成されている場合にも、下り傾斜状となした
上部横翼片の俯角を、上り傾斜状となした下部横翼片の
仰角よりも大となしているため、上部横翼片にブリッジ
が大きな負荷となって作用することがなく、その結果、
内・外側撹拌翼の引き上げ作業をスムーズに行うことが
できる。In this way, after excavation and stirring of the soil, the inner and outer stirring blades can be pulled up while rotating in the direction opposite to the direction of the excavation rotation. Even when a bridge (so-called jamming) is formed on the upper side, the depression angle of the upper horizontal wing piece inclined downward is made larger than the elevation angle of the lower horizontal wing piece inclined upward. As a result, the bridge does not act as a large load on the upper horizontal wing piece, and as a result,
The lifting work of the inner and outer stirring blades can be performed smoothly.
【００３４】従って、特に、締まった砂質土（含水比が
小さい細砂若しくは微細砂）や粘着力に富んだ粘性土地
盤の場合でも、内・外側撹拌翼の引き上げ作業をスムー
ズに行うことができて、地盤改良作業能率を向上させる
ことができる。Accordingly, even in the case of a compact sandy soil (fine sand or fine sand having a small water content) or a viscous ground having a high adhesive strength, it is possible to smoothly lift the inner and outer stirring blades. It is possible to improve the efficiency of ground improvement work.
【００３５】[0035]
【実施例】以下に、本発明の実施例を、図面を参照しな
がら説明する。Embodiments of the present invention will be described below with reference to the drawings.
【００３６】図1に示すＡは、本発明に係る地盤改良装
置であり、同地盤改良装置Ａは、ベースマシン１と固化
材供給部２とを装備している。A shown in FIG. 1 is a ground improvement apparatus according to the present invention. The ground improvement apparatus A includes a base machine 1 and a solidified material supply unit 2.
【００３７】ベースマシン１は、自走可能なベースマシ
ン本体３に上下方向に伸延するリーダ４を設け、同リー
ダ４にモータ支持体５を昇降自在に取り付け、同モータ
支持体５に駆動用モータ６を搭載し、同駆動用モータ６
に上下方向に伸延する掘削軸体７の上端部を二重反転歯
車機構８を介して着脱自在に取り付け、同掘削軸体７の
下部周面に相対撹拌翼体９を取り付けると共に、同掘削
軸体７の下端部に掘削刃体10を取り付けている。The base machine 1 is provided with a vertically extending reader 4 on a self-propelled base machine main body 3, a motor support 5 is attached to the reader 4 so as to be able to move up and down, and a driving motor is mounted on the motor support 5. 6 and the driving motor 6
The upper end of the excavating shaft 7 extending vertically is detachably attached via a contra-rotating gear mechanism 8, and a relative stirring blade 9 is attached to a lower peripheral surface of the excavating shaft 7. An excavating blade 10 is attached to the lower end of the body 7.
【００３８】固化材供給部２は、固化材収容タンクと固
化材供給ポンプ（図示しない）とを具備し、同固化材供
給ポンプに固化材供給ホース11の基端部を接続し、同固
化材供給ホース11の先端部を前記掘削軸体７にスイベル
ジョイント12を介して接続している。The solidified material supply unit 2 includes a solidified material storage tank and a solidified material supply pump (not shown). The solidified material supply pump connects the base end of the solidified material supply hose 11 to the solidified material supply pump. The distal end of the supply hose 11 is connected to the excavation shaft 7 via a swivel joint 12.
【００３９】掘削軸体７は、図２及び図３にも示すよう
に、上下方向に伸延させて形成した筒状の内側軸20と、
同内側軸20の外周を囲繞する状態に上下方向に伸延させ
て形成した筒状の外側軸21とから内外側二重軸構造に構
成しており、内側軸20と外側軸21は、駆動用モータ６に
より二重反転歯車機構８を介して同一軸芯廻りに相互に
反対方向に回転するようにしている。As shown in FIGS. 2 and 3, the excavating shaft 7 has a cylindrical inner shaft 20 formed by extending vertically.
The inner shaft 20 and the outer shaft 21 are used for driving the inner shaft 20 and the outer shaft 21.The inner shaft 20 and the outer shaft 21 are composed of a cylindrical outer shaft 21 formed by extending vertically in a state surrounding the outer periphery of the inner shaft 20. The motor 6 rotates in opposite directions around the same axis through a contra-rotating gear mechanism 8.
【００４０】そして、内側軸20中には上下方向に伸延さ
せて形成した筒状体22を挿通して、同筒状体22中に内側
固化材供給路23を形成する一方、同筒状体22の外周面と
内側軸20の内周面との間に外側固化材供給路24を形成し
ている。Then, a cylindrical body 22 formed by extending vertically is inserted into the inner shaft 20 to form an inner solidified material supply passage 23 in the cylindrical body 22, while the cylindrical body 22 is An outer solidifying material supply passage 24 is formed between the outer peripheral surface of the inner shaft 22 and the inner peripheral surface of the inner shaft 20.
【００４１】しかも、内側軸20の上端部には連通路（図
示せず）を形成して、同連通路を介して内側固化材供給
路23と外側固化材供給路24とを連通させ、固化材供給ホ
ース11を通して供給される固化材を、内側固化材供給路
23と外側固化材供給路24とに分流させて供給することが
できるようにしている。Further, a communication passage (not shown) is formed at the upper end of the inner shaft 20, and the inner solidified material supply passage 23 and the outer solidified material supply passage 24 are communicated through the communication passage to solidify the solidified material. The solidified material supplied through the material supply hose 11 is supplied to the inner solidified material supply path.
The flow is divided and supplied to the outside solidification material supply path 24 and the outside solidification material supply path 24.
【００４２】ここで、内側軸20の下端部には刃体取付体
13を介して掘削刃体10を取り付けており、同刃体取付体
13に第１固化材吐出部29を設けている。Here, the lower end of the inner shaft 20 is provided with a blade mounting body.
The excavation blade body 10 is mounted via 13 and the blade body mounting body
13 is provided with a first solidified material discharge section 29.
【００４３】そして、第１固化材吐出部29は、筒状に形
成した刃体取付体13の周壁に円形状の第１固化材吐出孔
29aを形成し、同第１固化材吐出孔29aを内側固化材供給
路23に接続して、同内側固化材供給路23を通して供給さ
れる固化材は、第１固化材吐出孔29aより直下方へ向け
て吐出されるようにしている。The first solidified material discharge portion 29 is provided with a circular first solidified material discharge hole on the peripheral wall of the blade body mounting body 13 formed in a cylindrical shape.
29a, the first solidified material discharge hole 29a is connected to the inner solidified material supply passage 23, and the solidified material supplied through the inner solidified material supply passage 23 is directly below the first solidified material discharge hole 29a. The liquid is discharged toward
【００４４】相対撹拌翼体９は、図２及び図３にも示す
ように、最内側撹拌翼26と、同最内側撹拌翼26の外周を
相対的に反対方向に回転する内側撹拌翼27と、同内側撹
拌翼27の外周を相対的に反対方向に回転する外側撹拌翼
28とを具備しており、内側撹拌翼27と外側撹拌翼28は、
略相似形に形成して、両撹拌翼27,28間に形成される間
隙を、両撹拌翼27,28のほぼ全域にわたってほぼ等しい
幅員となすことにより、掘削土壌の共回り現象を防止す
ることができると共に、緻密な撹拌機能を発揮させるこ
とができるようにしている。As shown in FIGS. 2 and 3, the relative stirring blade body 9 includes an innermost stirring blade 26 and an inner stirring blade 27 that rotates the outer periphery of the innermost stirring blade 26 in a relatively opposite direction. , An outer stirring blade that rotates the outer periphery of the inner stirring blade 27 in a relatively opposite direction.
28, the inner stirring blade 27 and the outer stirring blade 28,
By forming the gap between the two stirring blades 27 and 28 in a substantially similar shape and having a width almost equal over almost the entire area of both the stirring blades 27 and 28, the co-rotation phenomenon of the excavated soil is prevented. And a fine stirring function can be exhibited.
【００４５】最内側撹拌翼26は、外側軸21の下端部より
放射状に突出させて形成しており、外側軸21の下端部の
線対称位置に一対設けて、外側軸21と一体的にａ方向に
回転するようにしている。The innermost stirring blades 26 are formed so as to project radially from the lower end of the outer shaft 21. A pair of innermost stirring blades 26 are provided at line-symmetric positions of the lower end of the outer shaft 21, and are integrally formed with the outer shaft 21. It rotates in the direction.
【００４６】内側撹拌翼27は、掘削軸体７の半径方向に
張り出し状に伸延する上下一対の上・下部横翼片27a,27
bと、両上・下部横翼片27a,27bの外側端部間に上下方向
に伸延させて介設した縦翼片27cとから弧状に形成して
おり、外側軸21の外周面に回転自在に遊嵌したリング状
の翼片支持体30に上部横翼片27aの先端部を取り付ける
一方、内側軸20の下端部に下部横翼片27bの先端部を取
り付けて、内側軸20と一体的にｂ方向に回転するように
している。The inner stirring blade 27 is a pair of upper and lower horizontal blade pieces 27a, 27 extending in the radial direction of the excavating shaft 7 so as to protrude.
b and the vertical wing piece 27c extending vertically and interposed between the outer ends of the upper and lower horizontal wing pieces 27a, 27b, and is formed in an arc shape, and is rotatable on the outer peripheral surface of the outer shaft 21 The tip of the upper horizontal wing piece 27a is attached to the ring-shaped wing piece support 30 that is loosely fitted on the inner shaft 20, while the tip of the lower horizontal wing piece 27b is attached to the lower end of the inner shaft 20 to be integrated with the inner shaft 20 To rotate in the direction b.
【００４７】そして、縦翼片27cの中央部と内側軸20と
の間には、左右方向に直状に伸延する中間横翼片27dを
横架状に形成し、同中間横翼片27d中に固化材導入路33
を形成して、同固化材導入路33を通して後述する第２固
化材吐出部32と外側固化材供給路24とを接続している。Between the central portion of the vertical wing piece 27c and the inner shaft 20, an intermediate horizontal wing piece 27d extending straight in the left-right direction is formed in a horizontal shape. Solidified material introduction path 33
Is formed, and a second solidified material discharge section 32 described later and the outer solidified material supply path 24 are connected through the solidified material introduction path 33.
【００４８】このようにして、左右方向に直状の中間翼
片27dを増設して掘削土壌の撹拌効率を向上させると共
に、かかる直状の中間翼片27d中に固化材導入路33を形
成することにより、かかる固化材導入路33を可及的に短
くかつ簡単に形成することができて、加工コストを安価
にすることができる。As described above, the straight intermediate blade pieces 27d are added in the left-right direction to improve the stirring efficiency of the excavated soil, and the solidified material introduction path 33 is formed in the straight intermediate blade pieces 27d. Thus, the solidified material introduction path 33 can be formed as short and as simple as possible, and the processing cost can be reduced.
【００４９】また、上記した内側撹拌翼27は、内側軸20
の下部の線対称位置に一対設けている。31は、縦翼片27
cの中途部より外方へ突出させて形成した小翼片であ
る。The inner stirring blade 27 described above is
Are provided at a line symmetrical position below. 31 is the vertical wing piece 27
Small wing piece formed to protrude outward from the middle part of c.
【００５０】外側撹拌翼28は、掘削軸体７の半径方向に
張り出し状に伸延する上下一対の上・下部横翼片28a,28
bと、両上・下部横翼片28a,28bの外側端部間に上下方向
に伸延させて介設した縦翼片28cとから弧状に形成して
おり、外側軸21の下端部に上部横翼片28aの先端部を取
り付ける一方、内側軸20の外周面に回転自在に遊嵌した
リング状の翼片支持体34に下部横翼片28bの先端部を取
り付けて、外側軸21と一体的にａ方向に回転するように
している。The outer stirring blade 28 includes a pair of upper and lower horizontal blades 28a, 28 extending in the radial direction of the excavating shaft 7 so as to protrude.
b and a vertical wing piece 28c extending vertically and interposed between the outer ends of the upper and lower horizontal wing pieces 28a, 28b, and is formed in an arc shape at the lower end of the outer shaft 21. While attaching the tip of the wing piece 28a, the tip of the lower horizontal wing piece 28b is attached to a ring-shaped wing piece support 34 which is rotatably and loosely fitted on the outer peripheral surface of the inner shaft 20, and is integrated with the outer shaft 21. In the direction a.
【００５１】そして、外側撹拌翼28は、掘削軸体７の下
部の円周方向に一定の間隔を開けて三個設けている。35
は、縦翼片28cの上部と下部にそれぞれ外方へ突出させ
て形成した小翼片であり、これら小翼片35,35の回転軌
跡は、内側撹拌翼27に設けた小翼片31の回転軌跡と上下
方向にオーバーラップするように配置して、相対的に逆
回転する内・外側撹拌翼27,28間において、掘削土壌の
撹拌が確実に行えるようにしている。The three outer stirring blades 28 are provided at regular intervals in the circumferential direction below the excavating shaft 7. 35
Are small wing pieces formed by projecting outwardly at the upper and lower portions of the vertical wing piece 28c, respectively, and the rotation trajectory of these small wing pieces 35, 35 is the same as that of the small wing piece 31 provided on the inner stirring blade 27. The rotating trajectory is arranged so as to overlap the vertical direction, so that the excavated soil can be surely stirred between the inner and outer stirring blades 27 and 28 which rotate relatively in reverse.
【００５２】また、内側撹拌翼27には、固化材を吐出す
る第２固化材吐出部32を設けており、以下にかかる第２
固化材吐出部32について説明する。Further, the inner stirring blade 27 is provided with a second solidified material discharge section 32 for discharging the solidified material.
The solidified material discharge section 32 will be described.
【００５３】すなわち、図２及び図３に示すように、内
側撹拌翼27の縦翼片27cと中間横翼片27dとの交差部には
第２固化材吐出部32を設けており、同第２固化材吐出部
32は、縦翼片27cの背面（回転方向側の面とは反対側の
面）に上下方向に伸延する第２固化材吐出縦長孔32aを
形成すると共に、中間横翼片27dの背面（回転方向側の
面とは反対側の面）に水平方向に伸延する第２固化材吐
出横長孔32bを形成して、両孔32a,32bをＴ字状に連通さ
せている。That is, as shown in FIGS. 2 and 3, a second solidified material discharge section 32 is provided at the intersection of the vertical blade piece 27c and the intermediate horizontal blade piece 27d of the inner stirring blade 27. 2 Solidification material discharge section
32 has a second solidified material discharge vertically elongated hole 32a extending in the vertical direction on the back surface (the surface opposite to the surface in the rotation direction) of the vertical blade piece 27c, and the rear surface (rotational surface) of the intermediate horizontal blade piece 27d. A second solidified material discharge laterally elongated hole 32b extending in the horizontal direction is formed on the surface on the opposite side to the direction side surface), and both holes 32a and 32b communicate with each other in a T-shape.
【００５４】そして、第２固化材吐出縦・横長孔32a,32
bは、中間横翼片27d中に形成した固化材導入路33を通し
て外側固化材供給路24に接続している。Then, the second solidified material discharge vertical / horizontally long holes 32a, 32
b is connected to the outer solidified material supply passage 24 through the solidified material introduction passage 33 formed in the intermediate horizontal blade piece 27d.
【００５５】このようにして、軟弱な地盤Ｇを改良する
際には、地盤改良現場にベースマシン１を移動させるこ
とにより、リーダ４を建て込み、同リーダ４に沿わせて
掘削軸体７を回転させながら下降させることにより、地
盤Ｇを掘削刃体10により掘削すると共に、相対撹拌翼体
９により掘削土壌を撹拌する。As described above, when improving the soft ground G, the leader 4 is built by moving the base machine 1 to the ground improvement site, and the excavation shaft 7 is moved along the leader 4. By lowering while rotating, the ground G is excavated by the excavating blade body 10 and the excavated soil is agitated by the relative stirring blade body 9.
【００５６】この際、固化材供給部２より固化材を固化
材供給ホース11→スイベルジョイント12→掘削軸体７→
第１・第２固化材吐出部29,32に供給して、各固化材吐
出部29,32より固化材を吐出させるようにしており、か
かる固化材を掘削土壌中に均一に撹拌して、掘削土壌を
固化させることにより、軟弱な地盤Ｇ中に柱状若しくは
壁状の地盤改良体を築造して、同地盤Ｇを改良すること
ができる。At this time, the solidified material is supplied from the solidified material supply unit 2 to the solidified material supply hose 11 → the swivel joint 12 → the excavating shaft 7 →
The solidified material is supplied to the first and second solidified material discharge units 29 and 32 so that the solidified material is discharged from each of the solidified material discharge units 29 and 32. The solidified material is uniformly stirred in the excavated soil, By solidifying the excavated soil, a columnar or wall-shaped ground improvement body can be built in the soft ground G, and the ground G can be improved.
【００５７】特に、外側固化材供給路24に供給された固
化材は、固化材導入路33を通して第２固化材吐出部32の
第２固化材吐出縦・横長孔32a,32bより吐出させること
ができるようにしており、第２固化材吐出縦長孔32a
は、内側撹拌翼27の回転方向とは反対側の背面に形成し
ているため、固化材を円滑に吐出させることができると
共に、上下縦長孔に形成しているため、固化材を上下縦
長の帯状に吐出させることができる。In particular, the solidified material supplied to the outer solidified material supply passage 24 can be discharged from the second solidified material discharge vertical and horizontal holes 32a and 32b of the second solidified material discharge portion 32 through the solidified material introduction passage 33. And a second solidified material discharge vertical hole 32a.
Is formed on the back side opposite to the rotation direction of the inner stirring blade 27, so that the solidified material can be discharged smoothly, and since the solidified material is formed in the vertically long holes, the solidified material is vertically elongated. It can be discharged in a band shape.
【００５８】しかも、内側撹拌翼27が回転しながら掘削
軸体７の掘進方向に移動することから、固化材の膜が円
周方向及び上下方向に連続した筒状膜を形成することに
なり、その結果、掘削土壌中において固化材を掘進方向
に満遍なく配置することができる。Moreover, since the inner stirring blade 27 rotates and moves in the excavation direction of the excavating shaft 7, the film of the solidified material forms a cylindrical film continuous in the circumferential direction and the vertical direction. As a result, the solidified material can be arranged evenly in the excavation direction in the excavated soil.
【００５９】さらには、第２固化材吐出横長孔32bは、
内側撹拌翼27の回転方向とは反対側の背面に形成してい
るため、固化材を円滑に吐出させることができると共
に、水平方向に横長孔に形成しているため、固化材をリ
ング状に吐出させることができる。Further, the second solidified material discharge horizontally long hole 32b is
The solidified material is formed on the back side opposite to the rotation direction of the inner stirring blade 27, so that the solidified material can be discharged smoothly, and since the solidified material is formed in a horizontally long hole, the solidified material is formed into a ring shape It can be ejected.
【００６０】しかも、内側撹拌翼27が回転しながら掘削
軸体７の掘進方向に移動することから、固化材の膜が円
周方向及び上下方向に連続したスパイラルな帯状膜を形
成することになり、その結果、掘削土壌中において固化
材を掘進方向に満遍なく配置することができる。In addition, since the inner stirring blade 27 moves in the excavating direction of the excavating shaft 7 while rotating, the solidified material film forms a spiral strip-shaped film continuous in the circumferential direction and the vertical direction. As a result, the solidified material can be arranged evenly in the excavation direction in the excavated soil.
【００６１】従って、かかる状態にて、互いに内外側に
重複状態の内・外側撹拌翼27,28を相互に反対方向に回
転させることにより、両撹拌翼27,28間の掘削土壌が反
対方向の流動を強制されて、必然的に掘削土壌が両撹拌
翼27,28間で交錯してもみ合い、掘削土壌を均一に混練
させることができ、かかる均一混練位置に上記した固化
材の筒状膜とスパイラルな帯状膜を形成することができ
ることから、掘削土壌と固化材とを効率良く均一に混練
させることができる。Therefore, in such a state, by rotating the inner and outer stirring blades 27 and 28 in an inner and outer overlapping state in opposite directions to each other, the excavated soil between the two stirring blades 27 and 28 is opposite to each other. Forced to flow, the excavated soil is inevitably intersected between the two stirring blades 27 and 28, and the excavated soil can be uniformly kneaded. Since a spiral strip film can be formed, the excavated soil and the solidified material can be efficiently and uniformly kneaded.
【００６２】ここで、固化材には、合成樹脂製の小断片
を適当な数量だけ分散させて混入させることにより、地
盤改良体中に合成樹脂製の小断片を混在させることがで
き、かかる小断片が地盤改良体に作用する水平方向の負
荷によって、同地盤改良体に生じる曲げ・引っ張り力に
対する耐力の強化に有効に機能し、その結果、地盤改良
体の水平方向の負荷耐力を増大させることができる。Here, small pieces made of synthetic resin are dispersed and mixed in an appropriate amount in the solidified material, so that small pieces made of synthetic resin can be mixed in the ground improvement body. The horizontal load acting on the ground improvement body by the fragments effectively functions to increase the strength of the ground improvement body against bending and pulling forces, thereby increasing the horizontal load capacity of the ground improvement body. Can be.
【００６３】上記のような構成において、本発明の要旨
は、図２及び図３に示すように、内・外側撹拌翼27,28
の横断面幅を中央部27e,28eから回転方向側の端面27f,2
7g,28f,28gに向けて漸次細幅に形成して、内側面をテー
パー面27h,27i,28h,28iとなしたことにある。In the above configuration, the gist of the present invention is that, as shown in FIG. 2 and FIG.
The cross-sectional width of the end face 27f, 2 on the rotation direction side from the central part 27e, 28e.
That is, the width is gradually reduced toward 7g, 28f, and 28g, and the inner side surfaces are tapered surfaces 27h, 27i, 28h, and 28i.
【００６４】このようにして、外側撹拌翼28の回転方向
ａ側の端面28fにより土壌を掘削すると共に、掘削した
土壌をテーパー面28hに沿わせて内側撹拌翼27側へスム
ーズに案内する内側撹拌翼側案内流路ｃを形成すること
ができるようにしている。In this manner, the soil is excavated by the end face 28f of the outer stirring blade 28 on the rotation direction a side, and the inner stirring is performed such that the excavated soil is smoothly guided to the inner stirring blade 27 along the tapered surface 28h. The wing-side guide flow path c can be formed.
【００６５】この際、外側撹拌翼28の回転方向ａ側の端
面28fは細幅に形成しているため、土壌の掘削が円滑か
つ確実に行えると共に、同端面28fには掘削土壌が付着
されることなく内側面のテーパー面28hに沿って内側撹
拌翼27側に案内される。At this time, since the end face 28f on the rotation direction a side of the outer stirring blade 28 is formed to be narrow, the excavation of the soil can be performed smoothly and reliably, and the excavated soil is attached to the end face 28f. It is guided to the inner stirring blade 27 side along the tapered surface 28h on the inner surface without any change.
【００６６】その結果、外側撹拌翼28により掘削される
と共に、内側撹拌翼側案内流路ｃを通して案内される土
壌と、内側撹拌翼27により掘削された土壌とを相対的に
逆回転させながら効率良く撹拌させることができ、掘削
土壌が強粘土質の場合も、同掘削土壌が土塊状となるの
を防止しながら、同掘削土壌と固化材とを効率良く均一
に混練させることができる。As a result, while being excavated by the outer stirring blade 28, the soil guided through the inner stirring blade side guide passage c and the soil excavated by the inner stirring blade 27 are efficiently rotated while being relatively reversely rotated. The excavated soil can be agitated, and even when the excavated soil is made of a strong clay, the excavated soil and the solidified material can be efficiently and uniformly kneaded while preventing the excavated soil from forming a clump of soil.
【００６７】また、内側撹拌翼27の回転方向ｂ側の端面
27fにより土壌を掘削すると共に、掘削した土壌をテー
パー面27hに沿わせて掘削軸体７側へスムーズに案内す
る掘削軸体側案内流路ｄを形成することができるように
している。The end face of the inner stirring blade 27 on the rotation direction b side
The soil is excavated by 27f, and an excavation shaft-side guide flow path d that guides the excavated soil smoothly to the excavation shaft 7 along the tapered surface 27h can be formed.
【００６８】この際、内側撹拌翼27の回転方向ｂ側の端
面27fは細幅に形成しているため、土壌の掘削が円滑か
つ確実に行えると共に、同端面27fには掘削土壌が付着
されることなく内側面のテーパー面27hに沿って掘削軸
体側案内流路ｄが形成されて、掘削土壌が掘削軸体側に
円滑かつ確実に案内される。At this time, since the end face 27f on the rotation direction b side of the inner stirring blade 27 is formed narrow, the excavation of the soil can be performed smoothly and reliably, and the excavated soil is attached to the end face 27f. The excavation shaft-side guide flow path d is formed along the tapered surface 27h on the inner side without causing the excavated soil to be smoothly and reliably guided to the excavation shaft side.
【００６９】その結果、掘削土壌が強粘土質の場合も、
同掘削土壌が土塊状となるのを防止しながら、同掘削土
壌と固化材とを効率良く均一に混練させることができ
る。As a result, even when the excavated soil is a strong clay,
The excavated soil and the solidified material can be efficiently and uniformly kneaded while preventing the excavated soil from being formed into a mass of soil.
【００７０】図４は、第２実施例としての相対撹拌翼体
９の断面平面説明図であり、同第２実施例では、内側撹
拌翼27の横断面幅を中央部27eから回転方向ａ，ｂ側の
端面27f,2 7gに向けて漸次細幅に形成して、外側面をテ
ーパー面27h,27iとなしている。FIG. 4 is an explanatory cross-sectional plan view of a relative stirring blade body 9 as a second embodiment. In the second embodiment, the transverse cross-sectional width of the inner stirring blade 27 is changed from the central portion 27e in the rotation directions a, The width is gradually reduced toward the end surfaces 27f, 27g on the b side, and the outer surfaces are tapered surfaces 27h, 27i.
【００７１】このようにして、内側撹拌翼27の回転方向
ｂ側の端面27fにより土壌を掘削すると共に、掘削した
土壌をテーパー面27hに沿わせて外側撹拌翼28側へスム
ーズに案内する外側撹拌翼側案内流路ｅを形成すること
ができるようにしている。In this manner, the soil is excavated by the end face 27f of the inner stirring blade 27 on the rotation direction b side, and the outer stirring that guides the excavated soil smoothly to the outer stirring blade 28 along the tapered surface 27h. The wing-side guide channel e can be formed.
【００７２】この際、内側撹拌翼27の回転方向ｂ側の端
面27fは細幅に形成しているため、土壌の掘削が円滑か
つ確実に行えると共に、同端面27fには掘削土壌が付着
されることなく外側面のテーパー面27hに沿って外側撹
拌翼側案内流路ｅが形成されて、掘削土壌が外側撹拌翼
28側に案内される。At this time, since the end face 27f on the rotation direction b side of the inner stirring blade 27 is formed to be narrow, the excavation of the soil can be performed smoothly and reliably, and the excavated soil is attached to the end face 27f. The outer stirring blade side guide passage e is formed along the tapered surface 27h of the outer surface without excavating soil.
You will be guided to the 28 side.
【００７３】その結果、掘削土壌が強粘土質の場合も、
同掘削土壌が土塊状となるのを防止しながら、内・外側
撹拌翼27,28間にて掘削土壌と固化材とを効率良く均一
に混練させることができる。As a result, even when the excavated soil is a strong clay,
The excavated soil and the solidified material can be efficiently and uniformly kneaded between the inner and outer stirring blades 27 and 28 while preventing the excavated soil from being formed into a mass of soil.
【００７４】図５は、第３実施例としての相対撹拌翼体
９の断面平面説明図であり、同第３実施例では、内側撹
拌翼27の横断面幅を中央部27eから回転方向ａ，ｂ側の
端面27f,27gに向けて漸次細幅に形成して、内・外側面
をそれぞれテーパー面27h,27i,27j,27kとなしている。FIG. 5 is a cross-sectional plan view of a relative stirring blade body 9 as a third embodiment. In the third embodiment, the width of the cross section of the inner stirring blade 27 is changed from the central portion 27e in the rotation direction a, The width is gradually reduced toward the end surfaces 27f, 27g on the b side, and the inner and outer surfaces are tapered surfaces 27h, 27i, 27j, 27k, respectively.
【００７５】このようにして、内側撹拌翼27の回転方向
ｂ側の端面27fにより土壌を掘削すると共に、掘削した
土壌をテーパー面27h,27jに沿わせて掘削軸体７側と外
側撹拌翼28側とに振り分け状にしてスムーズに案内する
掘削軸体側案内流路ｄと外側撹拌翼側案内流路ｅとを形
成することができるようにしている。In this manner, soil is excavated by the end face 27f of the inner stirring blade 27 on the rotation direction b side, and the excavated soil is moved along the tapered surfaces 27h and 27j to the excavating shaft 7 side and the outer stirring blade 28. An excavating shaft-side guide flow path d and an outer stirring blade-side guide flow path e are provided so as to be smoothly distributed to the side.
【００７６】この際、内側撹拌翼27の回転方向ｂ側の端
面27fは細幅に形成しているため、土壌の掘削が円滑か
つ確実に行えると共に、同端面27fには掘削土壌が付着
されることなく内・外側面のテーパー面27h,27jに沿っ
て掘削軸体側案内流路ｄと外側撹拌翼側案内流路ｅとが
形成されて、掘削土壌が掘削軸体７側と外側撹拌翼28側
とに案内される。At this time, since the end face 27f on the rotation direction b side of the inner stirring blade 27 is formed to be narrow, the excavation of the soil can be performed smoothly and reliably, and the excavated soil is attached to the end face 27f. The excavation shaft side guide flow path d and the outer stirring blade side guide flow path e are formed along the inner and outer taper surfaces 27h, 27j without any excavation, and the excavated soil is formed on the excavation shaft 7 side and the outer stirring blade 28 side. It will be guided to.
【００７７】その結果、掘削土壌が強粘土質の場合も、
同掘削土壌が土塊状となるのを防止しながら、内・外側
撹拌翼27,28間、及び、内側撹拌翼27と掘削軸体７との
間にて掘削土壌と固化材とを効率良く均一に混練させる
ことができる。As a result, even when the excavated soil is a strong clay,
The excavated soil and the solidified material are efficiently and uniformly distributed between the inner and outer stirring blades 27 and 28 and between the inner stirring blade 27 and the excavation shaft 7 while preventing the excavated soil from forming a mass of soil. Can be kneaded.
【００７８】図６は、第４実施例としての相対撹拌翼体
９の断面平面説明図であり、同第４実施例では、内側面
のテーパー面27h,27iよりも外側面のテーパー面27j,27k
の傾斜角度を大きく設定して、内側面のテーパー面27h
に沿って形成される掘削軸体側案内流路ｄの屈曲角度よ
りも外側面のテーパー面27jに沿って形成される外側撹
拌翼側案内流路ｅの屈曲角度が大きくなるようにしてい
る。FIG. 6 is an explanatory cross-sectional plan view of a relative stirring blade body 9 as a fourth embodiment. In the fourth embodiment, the tapered surfaces 27j, 27j on the outer surface are more than the tapered surfaces 27h, 27i on the inner surface. 27k
Set the inclination angle of the inner side to 27h
The bending angle of the outer stirring blade side guide flow path e formed along the tapered surface 27j on the outer side is made larger than the bending angle of the excavation shaft side guide flow path d formed along.
【００７９】このようにして、外側撹拌翼側案内流路ｅ
を通して案内される掘削土壌と、内側撹拌翼側案内流路
ｃを通して案内される掘削土壌とが速やかに混練される
ようにすることができる。In this way, the outer stirring blade side guide passage e
And the excavated soil guided through the inner stirring blade side guide channel c can be kneaded quickly.
【００８０】また、外側撹拌翼28の上部横翼片28aは、
図２及び図７に示すように、掘削軸体７の軸線と直交す
る水平線Z1よりも下方へ向けて下り傾斜状となす一方、
下部横翼片28bは、掘削軸体７の軸線と直交する水平線Z
2よりも上方へ向けて上り傾斜状となし、かつ、下り傾
斜状となした上部横翼片28aの俯角θ1は、上り傾斜状と
なした下部横翼片28bの仰角θ2よりも大となしている。The upper horizontal blade piece 28a of the outer stirring blade 28 is
As shown in FIGS. 2 and 7, while forming a downward slope below a horizontal line Z1 orthogonal to the axis of the excavation shaft 7,
The lower horizontal wing piece 28b is a horizontal line Z orthogonal to the axis of the excavating shaft 7.
The angle of depression θ1 of the upper horizontal wing piece 28a that is inclined upward and downward and that is inclined downward above the angle 2 is larger than the elevation angle θ2 of the lower horizontal wing piece 28b that is inclined upward. ing.
【００８１】ここで、図７中、ｆは、上部横翼片28aに
沿って流下する掘削土壌の流下流路、一点鎖線で示す上
部横翼片28aの仮想線は、俯角θ1を仰角θ2と同一角と
した場合を示しており、ｇは、同仮想線で示す上部横翼
片28aに沿って流下する掘削土壌の流下流路である。Here, in FIG. 7, f denotes a flow path of the excavated soil flowing down along the upper horizontal blade piece 28a, and a virtual line of the upper horizontal blade piece 28a indicated by a dashed line indicates that the depression angle θ1 is the elevation angle θ2. The case where the angles are the same is shown, and g is the flow path of the excavated soil flowing down along the upper horizontal blade piece 28a indicated by the imaginary line.
【００８２】このようにして、土壌の掘削・撹拌後に
は、内・外側撹拌翼27,28を、掘削回転方向ａとは反対
方向に回転させながら引き上げ方向ｈ（上方向）に向け
て引き上げることができ、この際、これら内・外側撹拌
翼27,28の直上方にブリッジ（いわゆる、ジャーミン
グ）が形成されている場合にも、下り傾斜状となした上
部横翼片28aの俯角θ1を、上り傾斜状となした下部横翼
片28bの仰角θ2よりも大となしているため、上部横翼片
28aにブリッジが大きな負荷となって作用することがな
く、掘削土壌が流下流路ｆを通して円滑に流下する。そ
の結果、内・外側撹拌翼27,28の引き上げ作業をスムー
ズに行うことができる。In this way, after excavating and stirring the soil, the inner and outer stirring blades 27 and 28 are lifted in the lifting direction h (upward) while being rotated in the direction opposite to the excavation rotation direction a. At this time, even when a bridge (so-called jamming) is formed directly above the inner / outer stirring blades 27 and 28, the depression angle θ1 of the downwardly inclined upper horizontal blade piece 28a can be reduced. , The upper horizontal blade piece 28b is larger than the elevation angle θ2 of the lower horizontal
The bridge does not act as a large load on 28a, and the excavated soil flows down smoothly through the downflow channel f. As a result, the work of raising the inner and outer stirring blades 27 and 28 can be performed smoothly.
【００８３】従って、特に、締まった砂質土（含水比が
小さい細砂若しくは微細砂）や粘着力に富んだ粘性土地
盤の場合でも、内・外側撹拌翼27,28の引き上げ作業を
スムーズに行うことができて、地盤改良作業能率を向上
させることができる。Accordingly, even in the case of compacted sandy soil (fine sand or fine sand having a small water content) or viscous soil with high adhesive strength, the lifting work of the inner and outer stirring blades 27 and 28 can be smoothly performed. It is possible to improve the efficiency of ground improvement work.
【００８４】[0084]
【発明の効果】本発明によれば、次のような効果が得ら
れる。According to the present invention, the following effects can be obtained.
【００８５】請求項１記載の本発明では、外側撹拌翼
は、両端部を掘削軸体に取り付けると共に、中途部を外
方に膨出させた弧状に形成すると共に、横断面幅を中央
部から回転方向側の端面に向けて漸次細幅に形成して、
内側面をテーパー面となしている。According to the first aspect of the present invention, the outer stirring blade has both ends attached to the excavating shaft, the middle part is formed in an arc shape bulging outward, and the cross-sectional width from the center part. Formed gradually narrower toward the end face on the rotation direction side,
The inner surface is tapered.
【００８６】このようにして、外側撹拌翼の回転方向側
の端面により土壌を掘削すると共に、掘削した土壌をテ
ーパー面に沿わせて内側撹拌翼側へスムーズに案内する
ことができるようにしている。In this way, the soil is excavated by the end face on the rotation direction side of the outer stirring blade, and the excavated soil can be smoothly guided to the inner stirring blade side along the tapered surface.
【００８７】この際、外側撹拌翼の回転方向側の端面は
細幅に形成しているため、土壌の掘削が円滑かつ確実に
行えると共に、同端面には掘削土壌が付着されることな
く内側面のテーパー面に沿って内側撹拌翼側に案内され
る。At this time, since the end face on the rotation direction side of the outer stirring blade is formed to be narrow, the excavation of the soil can be carried out smoothly and reliably, and the inner face is not attached to the end face without the excavated soil being attached. Is guided to the inner stirring blade side along the tapered surface of.
【００８８】その結果、外側撹拌翼により掘削された土
壌と、内側撹拌翼により掘削された土壌とを相対的に逆
回転させながら効率良く撹拌させることができ、掘削土
壌が強粘土質の場合も、同掘削土壌が土塊状となるのを
防止しながら、同掘削土壌と固化材とを効率良く均一に
混練させることができる。As a result, the soil excavated by the outer stirring blades and the soil excavated by the inner stirring blades can be efficiently agitated while being relatively rotated in the reverse direction. In addition, the excavated soil and the solidified material can be efficiently and uniformly kneaded while preventing the excavated soil from being formed into a mass of soil.
【００８９】請求項２記載の本発明では、内側撹拌翼
は、両端部を掘削軸体に取り付けると共に、中途部を外
方に膨出させた弧状に形成すると共に、横断面幅を中央
部から回転方向側の端面に向けて漸次細幅に形成して、
内側面をテーパー面となしている。According to the second aspect of the present invention, the inner stirring blade is attached to the excavating shaft at both ends, is formed in an arc shape with the middle part bulging outward, and has a cross-sectional width from the center. Formed gradually narrower toward the end face on the rotation direction side,
The inner surface is tapered.
【００９０】このようにして、内側撹拌翼の回転方向側
の端面により土壌を掘削すると共に、掘削した土壌をテ
ーパー面に沿わせて掘削軸体側へスムーズに案内するこ
とができるようにしている。In this way, the soil is excavated by the end face of the inner stirring blade on the rotation direction side, and the excavated soil can be smoothly guided to the excavation shaft along the tapered surface.
【００９１】この際、内側撹拌翼の回転方向側の端面は
細幅に形成しているため、土壌の掘削が円滑かつ確実に
行えると共に、同端面には掘削土壌が付着されることな
く内側面のテーパー面に沿って掘削土壌が掘削軸体側に
案内される。At this time, since the end face on the rotation direction side of the inner stirring blade is formed to be narrow, the excavation of the soil can be performed smoothly and reliably, and the excavated soil does not adhere to the inner face without being attached to the end face. The excavated soil is guided to the excavation shaft side along the tapered surface of.
【００９２】その結果、掘削土壌が強粘土質の場合も、
同掘削土壌が土塊状となるのを防止しながら、同掘削土
壌と固化材とを効率良く均一に混練させることができ
る。As a result, even when the excavated soil is a strong clay,
The excavated soil and the solidified material can be efficiently and uniformly kneaded while preventing the excavated soil from being formed into a mass of soil.
【００９３】請求項３記載の本発明では、内側撹拌翼
は、両端部を掘削軸体に取り付けると共に、中途部を外
方に膨出させた弧状に形成すると共に、横断面幅を中央
部から回転方向側の端面に向けて漸次細幅に形成して、
外側面をテーパー面となしている。According to the third aspect of the present invention, the inner stirring blade has both ends attached to the excavating shaft, the middle part is formed in an arc shape bulging outward, and the cross-sectional width from the center part. Formed gradually narrower toward the end face on the rotation direction side,
The outer surface is tapered.
【００９４】このようにして、内側撹拌翼の回転方向側
の端面により土壌を掘削すると共に、掘削した土壌をテ
ーパー面に沿わせて外側撹拌翼側へスムーズに案内する
ことができるようにしている。In this way, soil is excavated by the end face on the rotation direction side of the inner stirring blade, and the excavated soil can be smoothly guided to the outer stirring blade side along the tapered surface.
【００９５】この際、内側撹拌翼の回転方向側の端面は
細幅に形成しているため、土壌の掘削が円滑かつ確実に
行えると共に、同端面には掘削土壌が付着されることな
く外側面のテーパー面に沿って掘削土壌が外側撹拌翼側
に案内される。At this time, since the end face on the rotation direction side of the inner stirring blade is formed to be narrow, the excavation of the soil can be carried out smoothly and securely, and the excavated soil is not adhered to the end face. The excavated soil is guided to the outer stirring blade side along the tapered surface of.
【００９６】その結果、掘削土壌が強粘土質の場合も、
同掘削土壌が土塊状となるのを防止しながら、内・外側
撹拌翼間にて掘削土壌と固化材とを効率良く均一に混練
させることができる。As a result, even when the excavated soil is a strong clay,
The excavated soil and the solidified material can be efficiently and uniformly kneaded between the inner and outer stirring blades while preventing the excavated soil from being formed into a mass of soil.
【００９７】請求項４記載の本発明では、外側撹拌翼
は、掘削軸体の半径方向に張り出し状に伸延する上下一
対の上・下部横翼片と、両上・下部横翼片の外側端部間
に上下方向に伸延させて介設した縦翼片とから弧状に形
成すると共に、上部横翼片は、掘削軸体の軸線と直交す
る水平線よりも下方へ向けて下り傾斜状となす一方、下
部横翼片は、掘削軸体の軸線と直交する水平線よりも上
方へ向けて上り傾斜状となし、かつ、下り傾斜状となし
た上部横翼片の俯角は、上り傾斜状となした下部横翼片
の仰角よりも大となしている。According to the fourth aspect of the present invention, the outer stirring blade includes a pair of upper and lower upper and lower horizontal blades extending in the radial direction of the excavation shaft body and outer ends of the upper and lower horizontal blades. The upper horizontal wing piece is formed to be arcuate downward from a horizontal line orthogonal to the axis of the excavating shaft body, while being formed in an arc from the vertical wing piece extending vertically and interposed between the parts. The lower horizontal wing piece was upwardly inclined above a horizontal line perpendicular to the axis of the excavating shaft, and the downward angle of the upper horizontal wing piece was downwardly inclined. It is greater than the elevation angle of the lower horizontal wing piece.
【００９８】このようにして、土壌の掘削・撹拌後に
は、内・外側撹拌翼を、掘削回転方向とは反対方向に回
転させながら引き上げることができ、この際、これら内
・外側撹拌翼の直上方にブリッジ（いわゆる、ジャーミ
ング）が形成されている場合にも、下り傾斜状となした
上部横翼片の俯角を、上り傾斜状となした下部横翼片の
仰角よりも大となしているため、上部横翼片にブリッジ
が大きな負荷となって作用することがなく、その結果、
内・外側撹拌翼の引き上げ作業をスムーズに行うことが
できる。In this way, after excavation and stirring of the soil, the inner and outer stirring blades can be lifted up while rotating in the direction opposite to the direction of the excavation rotation. Even when a bridge (so-called jamming) is formed on the upper side, the depression angle of the upper horizontal wing piece inclined downward is made larger than the elevation angle of the lower horizontal wing piece inclined upward. As a result, the bridge does not act as a large load on the upper horizontal wing piece, and as a result,
The lifting work of the inner and outer stirring blades can be performed smoothly.
【００９９】従って、特に、締まった砂質土（含水比が
小さい細砂若しくは微細砂）や粘着力に富んだ粘性土地
盤の場合でも、内・外側撹拌翼の引き上げ作業をスムー
ズに行うことができて、地盤改良作業能率を向上させる
ことができる。Accordingly, even in the case of a compact sandy soil (fine sand or fine sand having a small water content) or a viscous ground having a high adhesive strength, it is possible to smoothly lift the inner and outer stirring blades. It is possible to improve the efficiency of ground improvement work.
【図１】本発明にかかる地盤改良装置の側面図。FIG. 1 is a side view of a ground improvement device according to the present invention.
【図２】掘削軸体と第１実施例としての相対撹拌翼体の
一部切欠側面図。FIG. 2 is a partially cutaway side view of an excavating shaft and a relative stirring blade body as a first embodiment.
【図３】同平面説明図。FIG. 3 is an explanatory plan view of the same.
【図４】第２実施例としての相対撹拌翼体の平面説明
図。FIG. 4 is an explanatory plan view of a relative stirring blade body as a second embodiment.
【図５】第３実施例としての相対撹拌翼体の平面説明
図。FIG. 5 is an explanatory plan view of a relative stirring blade body as a third embodiment.
【図６】第４実施例としての相対撹拌翼体の平面説明
図。FIG. 6 is an explanatory plan view of a relative stirring blade body as a fourth embodiment.
【図７】相対撹拌翼体の引き上げ作業説明図。FIG. 7 is an explanatory diagram of a lifting operation of the relative stirring blade body.
Ａ 地盤改良装置 １ ベースマシン ２ 固化材供給部 ３ ベースマシン本体 ４ リーダ ５ モータ支持体 ６ 駆動用モータ ７ 掘削軸体 ８ 二重反転歯車機構 ９ 相対撹拌翼体 A Ground improvement device 1 Base machine 2 Solidified material supply unit 3 Base machine main body 4 Reader 5 Motor support 6 Drive motor 7 Drilling shaft 8 Double reversing gear mechanism 9 Relative stirring blade
Claims (4)
すると共に、両内・外側軸を相互に逆回転可能となした
掘削軸体と、同掘削軸体に、内側撹拌翼と外側撹拌翼と
を内外側位置にて相対的に逆回転させるべく取り付けた
相対撹拌翼体とを具備し、内側撹拌翼と外側撹拌翼の少
なくともいずれか一方に、固化材を吐出する固化材吐出
部を設けた地盤改良装置において、 外側撹拌翼は、両端部を掘削軸体に取り付けると共に、
中途部を外方に膨出させた弧状に形成すると共に、横断
面幅を中央部から回転方向側の端面に向けて漸次細幅に
形成して、内側面をテーパー面となしたことを特徴とす
る地盤改良装置。An inner shaft and an outer shaft are formed as dual inner and outer shafts, and both inner and outer shafts are rotatable in opposite directions to each other. And a relative stirring blade attached to rotate the outer stirring blades relative to each other at the inner and outer positions, and a solidified material that discharges the solidified material to at least one of the inner stirring blade and the outer stirring blade. In the ground improvement device equipped with a discharge section, the outer stirring blades are attached to the excavation shaft at both ends,
The middle part is formed in the shape of an arc that bulges outward, and the width of the cross section is gradually reduced from the center to the end face on the rotation direction side, and the inner surface is tapered. Soil improvement device.
付けると共に、中途部を外方に膨出させた弧状に形成す
ると共に、横断面幅を中央部から回転方向側の端面に向
けて漸次細幅に形成して、内側面をテーパー面となした
ことを特徴とする請求項１記載の地盤改良装置。2. The inner stirring blade has both ends attached to the excavating shaft body, an intermediate portion formed in an arc shape bulging outward, and a cross-sectional width from the central portion toward the end face on the rotation direction side. The ground improvement device according to claim 1, wherein the inner surface is formed into a tapered surface by forming the inner surface into a tapered surface.
付けると共に、中途部を外方に膨出させた弧状に形成す
ると共に、横断面幅を中央部から回転方向側の端面に向
けて漸次細幅に形成して、外側面をテーパー面となした
ことを特徴とする請求項１又は２記載の地盤改良装置。3. The inner stirring blade has both ends attached to the excavation shaft body, an intermediate portion formed in an arc shape bulging outward, and a cross-sectional width extending from the center to the end face on the rotation direction side. The ground improvement device according to claim 1 or 2, wherein the outer surface is formed into a tapered surface by forming the outer surface into a tapered surface.
すると共に、両内・外側軸を相互に逆回転可能となした
掘削軸体と、同掘削軸体に、内側撹拌翼と外側撹拌翼と
を内外側位置にて相対的に逆回転させるべく取り付けた
相対撹拌翼体とを具備し、内側撹拌翼と外側撹拌翼の少
なくともいずれか一方に、固化材を吐出する固化材吐出
部を設けた地盤改良装置において、 外側撹拌翼は、掘削軸体の半径方向に張り出し状に伸延
する上下一対の上・下部横翼片と、両上・下部横翼片の
外側端部間に上下方向に伸延させて介設した縦翼片とか
ら弧状に形成すると共に、 上部横翼片は、掘削軸体の軸線と直交する水平線よりも
下方へ向けて下り傾斜状となす一方、下部横翼片は、掘
削軸体の軸線と直交する水平線よりも上方へ向けて上り
傾斜状となし、かつ、下り傾斜状となした上部横翼片の
俯角は、上り傾斜状となした下部横翼片の仰角よりも大
となしたことを特徴とする地盤改良装置。4. An excavating shaft body in which an inner shaft and an outer shaft are formed as an inner / outer double shaft, and both inner and outer shafts are rotatable in opposite directions. And a relative stirring blade attached to rotate the outer stirring blades relatively at the inner and outer positions, and a solidified material that discharges the solidified material to at least one of the inner stirring blades and the outer stirring blades In the soil improvement device provided with a discharge portion, the outer stirring blade is provided between a pair of upper and lower horizontal blades extending vertically in the radial direction of the excavation shaft and an outer end of the upper and lower horizontal blades. The upper horizontal wing piece is inclined downwards below a horizontal line perpendicular to the axis of the excavation shaft, while the upper horizontal wing piece is inclined downward. The horizontal wing pieces are inclined upward upward from a horizontal line perpendicular to the axis of the excavation shaft. And depression angle of the upper horizontal wing piece without a downward slope shape, soil improvement device being characterized in that no larger than the elevation of the lower horizontal wing piece without an upstream inclined.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001137660A JP4216487B2 (en) | 2001-05-08 | 2001-05-08 | Ground improvement device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001137660A JP4216487B2 (en) | 2001-05-08 | 2001-05-08 | Ground improvement device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2002332631A true JP2002332631A (en) | 2002-11-22 |
| JP4216487B2 JP4216487B2 (en) | 2009-01-28 |
Family
ID=18984733
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001137660A Expired - Lifetime JP4216487B2 (en) | 2001-05-08 | 2001-05-08 | Ground improvement device |
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| Country | Link |
|---|---|
| JP (1) | JP4216487B2 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006299538A (en) * | 2005-04-15 | 2006-11-02 | Epokoramu Kiko Kk | Soil improvement equipment |
| JP2009030370A (en) * | 2007-07-27 | 2009-02-12 | Jfe Steel Kk | Soil agitating method for columnar improvement of ground, and agitating head for use in it |
| JP6072950B1 (en) * | 2016-02-08 | 2017-02-01 | あおみ建設株式会社 | Deep layer processing equipment |
| JP6195186B1 (en) * | 2017-05-01 | 2017-09-13 | 有限会社 櫂設計事務所 | Excavation and stirring tool for ground improvement equipment |
| JP2019065604A (en) * | 2017-10-02 | 2019-04-25 | 日本基礎技術株式会社 | Excavation and agitation device |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10141730B2 (en) | 2017-04-07 | 2018-11-27 | Bobsbox, Llc. | In-ground enclosure system |
-
2001
- 2001-05-08 JP JP2001137660A patent/JP4216487B2/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006299538A (en) * | 2005-04-15 | 2006-11-02 | Epokoramu Kiko Kk | Soil improvement equipment |
| JP4566805B2 (en) * | 2005-04-15 | 2010-10-20 | エポコラム機工株式会社 | Ground improvement device and ground improvement method |
| JP2009030370A (en) * | 2007-07-27 | 2009-02-12 | Jfe Steel Kk | Soil agitating method for columnar improvement of ground, and agitating head for use in it |
| JP6072950B1 (en) * | 2016-02-08 | 2017-02-01 | あおみ建設株式会社 | Deep layer processing equipment |
| JP6195186B1 (en) * | 2017-05-01 | 2017-09-13 | 有限会社 櫂設計事務所 | Excavation and stirring tool for ground improvement equipment |
| JP2018188848A (en) * | 2017-05-01 | 2018-11-29 | 有限会社 櫂設計事務所 | Excavating and agitating instruments of ground improvement device |
| JP2019065604A (en) * | 2017-10-02 | 2019-04-25 | 日本基礎技術株式会社 | Excavation and agitation device |
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| Publication number | Publication date |
|---|---|
| JP4216487B2 (en) | 2009-01-28 |
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