JPS6110620A - Structure of agitating vane body for ground improving device - Google Patents
Structure of agitating vane body for ground improving deviceInfo
- Publication number
- JPS6110620A JPS6110620A JP13165184A JP13165184A JPS6110620A JP S6110620 A JPS6110620 A JP S6110620A JP 13165184 A JP13165184 A JP 13165184A JP 13165184 A JP13165184 A JP 13165184A JP S6110620 A JPS6110620 A JP S6110620A
- Authority
- JP
- Japan
- Prior art keywords
- hardener
- rotary shaft
- stirring
- excavated soil
- rotated
- 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
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
- E02D3/12—Consolidating by placing solidifying or pore-filling substances in the soil
- E02D3/126—Consolidating by placing solidifying or pore-filling substances in the soil and mixing by rotating blades
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Structural Engineering (AREA)
- Agronomy & Crop Science (AREA)
- Environmental & Geological Engineering (AREA)
- Soil Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
Description
【発明の詳細な説明】
（イ） 産業上の利用分野
この発明は地盤改良装置の撹拌翼構造に関するものであ
る。DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application This invention relates to a stirring blade structure for a soil improvement device.
（ロ） 従来の技術
従来、軟弱地盤を改良するために、ペーストマシン等で
地盤に垂直孔を穿設し、同孔中で掘削土と、硬化剤とを
撹拌混練し、その硬化により地盤を改良するという工法
があり、掘削土と、硬化剤との撹拌混線には、回転軸に
突設した撹拌棒等が用いられていた。(b) Conventional technology In the past, in order to improve soft ground, a vertical hole was drilled in the ground using a paste machine, etc., and the excavated soil and a hardening agent were stirred and kneaded in the hole, and the hardening caused the ground to improve. There is an improved construction method, in which a stirring rod or the like protruding from a rotating shaft is used to stir and mix the excavated soil and the hardening agent.
（ハ） 発明が解決しようとする問題点しかし、同撹拌
棒はすべて回転軸と一体に回転するものであるから、掘
削土が同軸と一体に回転する、いわゆる共回り現象を起
して充分な撹拌混練が行えず、特に、潟地等の水分含量
が多い地盤に粉状の硬化剤を用いた場合は、掘削上が撹
拌体を包み込む形の団子状になり、撹拌混練が全く行え
ないという欠点があった。(C) Problems to be solved by the invention However, since all of the stirring rods rotate together with the rotating shaft, the excavated soil rotates together with the same shaft, which is the so-called co-rotation phenomenon. Stirring and kneading cannot be performed, especially when powdered hardeners are used in ground with high moisture content, such as in lagoons. There were drawbacks.
（ニ） 問題点を解決するための手段
この発明では、相互に回転方向の異なる多重軸に内側よ
り順次互い違いに回転する略環状の撹拌翼体により撹拌
部を構成して充分な撹拌混練を行う地盤改良１Ａ置の撹
拌翼構造を提供Ｕんとするものである１゜
（ホ） 作 用
従って、複数の撹拌翼体は、相互に逆方向に回転してい
るので、掘削土が複雑な撹拌作用、特に相隣る撹拌翼体
間の掘削土は剪断作用を受けて共回り現象及び団子化が
防止されて充分な撹拌混線がなされるものである。(d) Means for Solving the Problems In this invention, the stirring section is constituted by substantially annular stirring blades that alternately rotate sequentially from the inside on multiple shafts with mutually different rotation directions, and sufficient stirring and kneading is performed. The purpose is to provide a stirring blade structure for soil improvement at 1A. In particular, the excavated soil between adjacent stirring blades is subjected to a shearing action, preventing co-rotation and clump formation, and achieving sufficient mixing.
〈へ） 効 果
この発明によれば、地盤改良装置の撹拌翼構造を上記の
ように構成することにより、掘削土を充分に撹拌混練し
て地盤改良の効果を向上させるという効果がある。Effects According to the present invention, by configuring the stirring blade structure of the soil improvement device as described above, there is an effect that the excavated soil is sufficiently stirred and kneaded to improve the effect of soil improvement.
（１〜） 実施例
本発明の実施例を図面にもとづき詳説すれば、＜Ａ）は
、地盤改良装置を示し、同装置＜Ａ）は、移動自在のベ
ースマシン（１）、硬化剤ポンプ（２）により構成され
ており、ベースマシン（１）はリーダー（３）により回
転軸（４）を垂直に支持し、リーダー（３）と回転軸（
４）との間に介設した油圧モーター（５）により回転軸
（４）と同軸（４）下端に連設した刃先（６）とを回転
させつつリーダー（３）に沿って同軸（４）を降下せし
めることにＪ：す、地盤（Ｇ）に垂直な掘削孔（Ｈ）を
穿設するように構成している。(1~) Embodiments The embodiments of the present invention will be described in detail based on the drawings. <A) shows a soil improvement device, and the device <A) includes a movable base machine (1), a hardener pump ( 2), the base machine (1) vertically supports the rotating shaft (4) by the leader (3), and the leader (3) and the rotating shaft (
The coaxial (4) is rotated along the leader (3) while rotating the rotary shaft (4) and the cutting edge (6) connected to the lower end of the coaxial (4) by the hydraulic motor (5) interposed between the coaxial (4) and the coaxial (4). The construction is such that an excavation hole (H) perpendicular to the ground (G) is drilled in order to lower the ground.
回転軸（４）は、二重軸、すなわち管状の外軸（７）内
部に内軸（８）を挿通し、同内外軸（７）、（８）上端
と油圧モーターく５）との間に介設した二重反転歯車機
構（９）により相互に反対方向に回転するように構成さ
れており、内軸（８）は外軸（７）下端よりも更に下方
向に延出しており、内軸（８）下端には掘削用の刃先（
６）が連設されている。The rotating shaft (4) is a double shaft, that is, the inner shaft (8) is inserted inside the tubular outer shaft (7), and the inner shaft (8) is inserted between the upper ends of the inner and outer shafts (7), (8) and the hydraulic motor (5). The inner shaft (8) extends further downward than the lower end of the outer shaft (7). The lower end of the inner shaft (8) has a cutting edge for digging (
6) are installed in succession.
回転軸（４）の刃先（６）上方位置には、撹拌部（Ｎ）
が構成されており、同撹拌部（Ｎ）は、内側、中間、外
側撹拌翼体（１０）（１１）（１２）で構成されており
、内側撹拌翼体（１ｏ）は、側面形が略半円弧状であり
、上下両端（１０）−１、（１０）−２は内軸（８）外
側面に固着している。A stirring part (N) is located above the cutting edge (6) of the rotating shaft (4).
The stirring section (N) is composed of inner, intermediate, and outer stirring blades (10), (11), and (12), and the inner stirring blade (1o) has an approximately lateral side shape. It has a semicircular arc shape, and both upper and lower ends (10)-1 and (10)-2 are fixed to the outer surface of the inner shaft (8).
中間撹拌翼体（１１）は、同上端（１１）−１が外軸く
７）の外側面に固着し、同下端は、同下端に構成した中
間軸支部（１１）−２を介して内軸（８）外側面に軸支
されている。The upper end (11)-1 of the intermediate stirring blade (11) is fixed to the outer surface of the outer shaft 7), and the lower end is connected to the inner part through the intermediate shaft support (11)-2 formed at the lower end. The shaft (8) is pivotally supported on the outer surface.
外側撹拌翼体（１２）は、同下端（１２＞ −１が内軸
（８）外側面に固着し、同上端は、同上端に構成した外
側軸支部（１２）−２を介して外軸（７）外側面に軸支
されている。The outer stirring blade (12) has its lower end (12>-1) fixed to the outer surface of the inner shaft (8), and its upper end connected to the outer shaft via the outer shaft support (12)-2 formed at the upper end. (7) Pivotally supported on the outer surface.
外軸（７）と内軸（８）は相互に逆方向に回転するもの
であるから、中間撹拌翼体（１１）が外側と内側撹拌翼
体（１０）（１２）の間にあってこれらとは逆方向に回
転し、この相互反転により、外側撹拌翼体（１２）で形
成される略球形状の空間内部、すなわち撹拌部＜Ｎ）内
部の掘削土を強力かつ複雑に撹拌混練し、特に、共回り
現象及び団子化を防止して充分な撹拌混練効果を得るも
のである。Since the outer shaft (7) and the inner shaft (8) rotate in opposite directions, the intermediate stirring blade (11) is located between the outer and inner stirring blades (10) and (12). They rotate in opposite directions, and by this mutual reversal, the excavated soil inside the approximately spherical space formed by the outer stirring blade (12), that is, inside the stirring section <N, is stirred and kneaded in a powerful and complex manner, and in particular, This is to prevent the co-rotation phenomenon and clump formation and obtain a sufficient stirring and kneading effect.
内側撹拌翼体上下端（１０）−１，（１０）−２の中間
に当る内軸（８）外側面には硬化剤噴射のだめの硬化剤
ノズル（１３）が噴射方向を水平にして配設されており
、同ノズル（１３）は内軸（８）中に設（プた通路（１
４）及び、同軸（８）上端に連設したスイベルジヨイン
ト（１５）及びホース（１６）を介して硬化剤ポンプ〈
２）と連通連結しているる
この考案の実施例は上記のように構成されており、地盤
改良作業に際して、まず、油圧モーター（５）の作動に
より回転軸（４）及び刃先（６）を回転させつつ降下さ
せて、地盤に円形柱状の掘削孔（）−１’）を穿設する
のであるが、この際周孔（Ｈ）中の排土は行わず、従っ
て刃先（６）及び撹拌部（Ｎ）は掘削土中に埋没した状
態となっている。 刃先（６）が所定深度に達すると、
回転軸（４）の降下を停止し、硬化剤ポンプ〈２）から
の硬化剤を硬化剤ノズル（１３）から噴射して掘削土と
硬化剤とを撹拌混練しつつ回転軸（４）を上昇せしめて
掘削孔（Ｈ）中に地盤改良部分を形成するものである。A curing agent nozzle (13) for curing agent injection is arranged on the outer surface of the inner shaft (8), which is located between the upper and lower ends of the inner stirring blade body (10)-1 and (10)-2, with the injection direction being horizontal. The nozzle (13) is installed in the inner shaft (8) through a passage (1).
4) and a curing agent pump <
2) is constructed as described above, and during ground improvement work, the rotating shaft (4) and the cutting edge (6) are first operated by the hydraulic motor (5). It is rotated and lowered to drill a circular column-shaped excavation hole ()-1') in the ground, but at this time, the soil in the peripheral hole (H) is not removed, and therefore the cutting edge (6) and the stirring Part (N) is buried in the excavated soil. When the cutting edge (6) reaches a predetermined depth,
Stop the descent of the rotating shaft (4), and raise the rotating shaft (4) while stirring and kneading the excavated soil and hardening agent by injecting the hardening agent from the hardening agent pump (2) from the hardening agent nozzle (13). At the very least, a ground improvement portion is formed in the excavation hole (H).
特に、内・外側撹拌翼体（１０）（１２）と中間撹拌翼
体（１１）どは、相互に反転しているので、同翼体（１
０）（１１）（１２）間に介入した掘削土には剪断力が
作用し、同反転作動によるｆ２ ｉｔな撹拌作用により
、撹拌混練作用を強化して掘削土と硬化剤との混合をよ
り均一なものとすると共に、同反転作動により共回り現
象が防止され確実な撹拌混線を行うことができるもので
ある。In particular, since the inner/outer stirring blades (10), (12) and the intermediate stirring blade (11) are reversed, the same blades (1
A shear force acts on the excavated soil interposed between 0) (11) and (12), and the f2 it stirring action due to the same reversal action strengthens the stirring and kneading action and improves the mixing of the excavated soil and hardening agent. In addition to making it uniform, the reversal action prevents the co-rotation phenomenon and ensures reliable stirring and mixing.
特に、湿地等の水分含量が多い地盤では、粉状の硬化剤
使用が望ましいが、かかる地盤で粉状硬化剤を使用する
と、掘削孔内周壁の地盤よりも、硬化剤の噴射を受けた
掘削土の方が剪断力が大となり、従来の撹拌翼では、同
翼体が団子状に包み込まれて充分な撹拌混線が行えない
ものであったが、本発明の撹拌翼体を有する撹拌部では
、相互に反転作用により、上記の団子化が防止され充分
な撹拌混練がなされるものである。In particular, it is desirable to use a powdered hardener in ground with a high moisture content such as wetlands, but if a powdered hardener is used in such ground, the excavation that has been sprayed with the hardener will be more likely to occur than in the ground on the inner circumferential wall of the borehole. The shearing force of soil is greater than that of soil, and with conventional stirring blades, the blades are wrapped in a lump shape, making it impossible to achieve sufficient stirring and mixing.However, in the stirring section with the stirring blades of the present invention, The mutual reversal action prevents the above-mentioned formation of clumps and ensures sufficient stirring and kneading.
なお、粉状硬化剤は、いわゆる空気粉体輸送法により、
気流中に粉状硬化剤を浮遊せしめ、流体と同様に管路内
を流れて噴射ノズルから空気と共に噴射されるものであ
る。In addition, the powdered curing agent is produced by the so-called air powder transport method.
A powdered curing agent is suspended in an air stream, flows through a pipe like a fluid, and is injected from an injection nozzle together with air.
なお、第３、第４、第５図は、それぞれ他実施例を示し
、第３図示のものは撹拌翼体（１７）形状を略角型とし
たもの、第４図示のものは同翼体く１８）数を５個とし
たもの、第５図示のものは、同翼体（１９）形状を略軍
配置形状としたものを示しており、土質等により選択使
用するものである。Note that FIGS. 3, 4, and 5 each show other embodiments, and the one shown in the third figure has the stirring blade (17) in a substantially rectangular shape, and the one shown in the fourth figure has the same blade. 18) The one shown in Figure 5, with five pieces in number, shows the same wing body (19) shaped approximately like a military configuration, which can be selected depending on the soil quality, etc.
第１図、本発明による撹拌翼構造を有する地盤改良装置
の全体側面図
第２図は、同要部拡大一部切欠側面図
第３図、第４図、第５図は他実施例
（４）：回転軸
（７）：外軸
（８）：内軸
（１０）：撹拌翼体（内側）
（１１）：撹拌翼体く中間）
（１２）：撹拌翼体（外側）FIG. 1 is an overall side view of a ground improvement device having a stirring blade structure according to the present invention. FIG. 2 is an enlarged partially cutaway side view of the same main part. ): Rotating shaft (7): Outer shaft (8): Inner shaft (10): Stirring blade body (inside) (11): Stirring blade body (middle) (12): Stirring blade body (outside)
Claims (1)
転軸（４）長手方向に沿って架橋状態の複数の撹拌翼体
（１０）（１１）（１２）を、各翼体（１０）（１１）
（１２）が互い違いに回転すべく連設してなる地盤改良
装置の撹拌翼構造。1) A plurality of cross-linked stirring blades (10), (11), and (12) are connected to a concentric rotating shaft (4) that rotates alternately along the longitudinal direction of the rotating shaft (4). (10) (11)
(12) A stirring blade structure of a soil improvement device in which the blades (12) are arranged in series so as to rotate alternately.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13165184A JPS6110620A (en) | 1984-06-25 | 1984-06-25 | Structure of agitating vane body for ground improving device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13165184A JPS6110620A (en) | 1984-06-25 | 1984-06-25 | Structure of agitating vane body for ground improving device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6110620A true JPS6110620A (en) | 1986-01-18 |
| JPH0573852B2 JPH0573852B2 (en) | 1993-10-15 |
Family
ID=15063039
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13165184A Granted JPS6110620A (en) | 1984-06-25 | 1984-06-25 | Structure of agitating vane body for ground improving device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6110620A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61165416A (en) * | 1985-01-16 | 1986-07-26 | Itakura Yoshie | Method and apparatus for improving soft ground |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS51149905U (en) * | 1975-05-26 | 1976-11-30 | ||
| JPS5915118A (en) * | 1982-07-16 | 1984-01-26 | Kokudo Sogo Kensetsu Kk | Method and apparatus for ground improvement |
-
1984
- 1984-06-25 JP JP13165184A patent/JPS6110620A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS51149905U (en) * | 1975-05-26 | 1976-11-30 | ||
| JPS5915118A (en) * | 1982-07-16 | 1984-01-26 | Kokudo Sogo Kensetsu Kk | Method and apparatus for ground improvement |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61165416A (en) * | 1985-01-16 | 1986-07-26 | Itakura Yoshie | Method and apparatus for improving soft ground |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0573852B2 (en) | 1993-10-15 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |