JPH0813471A - Mechanical stirring method - Google Patents
Mechanical stirring methodInfo
- Publication number
- JPH0813471A JPH0813471A JP14134794A JP14134794A JPH0813471A JP H0813471 A JPH0813471 A JP H0813471A JP 14134794 A JP14134794 A JP 14134794A JP 14134794 A JP14134794 A JP 14134794A JP H0813471 A JPH0813471 A JP H0813471A
- Authority
- JP
- Japan
- Prior art keywords
- ground
- pressure fluid
- mechanical stirring
- radius
- cross jet
- 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
(57)【要約】
【目的】 硬い地盤に対する施工を可能にする。
【構成】 機械撹拌翼（３）と掘削ビット（２）との間
に、交差部（Ｃ）の半径（Ｄ）が、撹拌翼（３）の半径
（ｄ）より若干量（δ）だけ大きい交差噴流（Ｊ、Ｊ）
を噴射するノズル（５）を設ける。
(57) [Summary] [Purpose] To enable construction on hard ground. [Structure] The radius (D) of the intersection (C) between the mechanical stirring blade (3) and the drill bit (2) is slightly larger than the radius (d) of the stirring blade (3) by an amount (δ). Cross jet (J, J)
A nozzle (5) for injecting is provided.
Description
【０００１】[0001]
【産業上の利用分野】本発明は、機械撹拌工法の改良に
関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to improvement of mechanical stirring method.
【０００２】[0002]
【従来の技術】かかる工法は、掘削ビット、機械撹拌ブ
レード及びグラウド材噴射ノズルを備えた装置を用いて
行われる。2. Description of the Related Art Such a construction method is carried out by using an apparatus equipped with a drill bit, a mechanical stirring blade and a grout material injection nozzle.
【０００３】[0003]
【発明が解決しようとする課題】従来の機械撹拌工法に
おいては、グラウド材を噴射しブレードで撹拌する際
に、ブレートに設けた掘削ビットで掘削孔を拡径するの
で、機械撹拌工法が施工可能であるか否かは、地盤の硬
さに対するブレードの拡径能力（掘削能力）で決まる。
したがって、従来、機械撹拌工法の施工は軟弱地盤の施
工に限られていた。In the conventional mechanical agitation method, the mechanical agitation method can be applied because the diameter of the excavation hole is increased by the excavation bit provided in the blade when the grout material is jetted and agitated by the blade. Whether or not is determined by the diameter expansion ability (excavation ability) of the blade with respect to the hardness of the ground.
Therefore, conventionally, the construction of the mechanical stirring method has been limited to the construction of soft ground.
【０００４】本発明は、硬い地盤に対しても施工可能な
機械撹拌工法を提供することを目的としている。An object of the present invention is to provide a mechanical agitation method that can be applied to hard ground.
【０００５】[0005]
【課題を解決するための手段】本発明の機械撹拌工法
は、回転軸の下端に設けた掘削ビットにより地盤を穿孔
する工程と、掘削ビット上方の噴射ノズルから高圧流体
で構成された交差噴流を噴出し前記地盤を切削撹拌して
当該地盤の組織を破壊する工程と、噴射ノズル上方の機
械攪拌ブレードにより混合攪拌する工程とを含み、前記
交差噴流の交差部半径は機械撹拌ブレードの半径より若
干大きくしている。The mechanical agitation method of the present invention comprises a step of boring the ground with an excavation bit provided at the lower end of a rotary shaft and a cross jet composed of high-pressure fluid from an injection nozzle above the excavation bit. Includes a step of cutting and stirring the ground to destroy the structure of the ground, and a step of mixing and stirring with a mechanical stirring blade above the spray nozzle, and the intersection radius of the cross jet is slightly smaller than the radius of the mechanical stirring blade. Making it big.
【０００６】ここで、前記交差噴流を、高圧流体及び該
高圧流体を包囲する様に噴射される空気流とにより構成
しても良い。或いは、前記交差噴流を、粉体を含んだ高
圧流体と、該高圧流体を包囲する様に噴射される空気流
とで構成しても良い。Here, the cross jet may be constituted by a high pressure fluid and an air stream jetted so as to surround the high pressure fluid. Alternatively, the cross jet may be composed of a high-pressure fluid containing powder and an air stream jetted so as to surround the high-pressure fluid.
【０００７】また、高圧流体としては、高圧水、硬化材
等が採用可能である。そして、高圧流体に含まれる粉体
としては、例えばセメントや砂等を用いることが出来
る。Further, as the high pressure fluid, high pressure water, a hardening material, etc. can be adopted. Then, as the powder contained in the high-pressure fluid, for example, cement or sand can be used.
【０００８】前記交差噴流を高圧水のみで構成する場合
には、グラウト材を機械撹拌ブレードから噴射するのが
好ましい。そして、前記交差噴流を硬化材で構成する場
合には、機械撹拌ブレートから補助的な硬化材を噴射す
るのが好ましい。When the cross jet is composed of only high-pressure water, it is preferable to jet the grout material from a mechanical stirring blade. When the cross jet is made of a hardening material, it is preferable to inject the auxiliary hardening material from the mechanical stirring plate.
【０００９】上記した本発明の実施に際して用いられる
装置（混練装置）は、例えば、回転軸の下端に掘削ビッ
トを設けて該掘削ビットの上方にグラウド材噴射ノズル
を備えた機械撹拌ブレードを設け、該機械撹拌ブレード
と前記掘削ビットとの間に、交差部半径が前記機械撹拌
ブレードの半径より若干大きい交差噴流を噴出するノズ
ルを設けている。その装置において、上述した通り、前
記交差噴流を高圧流体で構成するか、或いは、高圧流体
と該高圧流体を覆う空気流とで構成するのが好ましい。
さらに、前記交差噴流を、粉体を含んだ高圧流体と該高
圧流体を覆う空気流とで構成することも好ましい。The above-mentioned device (kneading device) used in the practice of the present invention has, for example, a drill bit provided at the lower end of a rotary shaft and a mechanical stirring blade provided with a grout material injection nozzle above the drill bit. A nozzle for ejecting a cross jet having an intersection radius slightly larger than the radius of the mechanical stirring blade is provided between the mechanical stirring blade and the drill bit. In the apparatus, as described above, it is preferable that the cross jet is composed of a high pressure fluid, or is composed of a high pressure fluid and an air stream covering the high pressure fluid.
Further, it is also preferable that the cross jet is composed of a high-pressure fluid containing powder and an air stream covering the high-pressure fluid.
【００１０】上記機械撹拌ブレードとしては、例えば、
棒状撹拌翼やオーガブレード等がある。As the mechanical stirring blade, for example,
There are rod-shaped stirring blades and auger blades.
【００１１】さらに、交差噴流の交差部半径が機械撹拌
ブレードの半径より「若干大きい」とは、注入されたグ
ラウト材が、交差噴流により破壊された地盤組織の半径
方向最外方と機械撹拌ブレードの半径方向最外端部との
間から逃げない程度であることを意味している。Furthermore, the fact that the intersection radius of the cross jet is "slightly larger than the radius of the mechanical stirring blade" means that the injected grout material is radially outermost of the ground structure destroyed by the cross jet and the mechanical stirring blade. It means that it does not escape from between the outermost end in the radial direction of.
【００１２】[0012]
【作用】上記のように構成された混練装置においては、
交差噴流により交差部半径内の地盤を切削撹拌し、地盤
の組織を破壊する。したがって、地盤の硬さが減少し、
機械撹拌ブレードの掘削抵抗が小さくなる。その結果、
硬い地盤でも機械撹拌ブレードで掘削して拡径しつつ、
破壊された地盤組織を撹拌し混練することが可能にな
る。In the kneading device configured as described above,
The cross jet jet stirs the ground within the radius of the intersection to destroy the structure of the ground. Therefore, the hardness of the ground decreases,
Excavation resistance of mechanical stirring blade is reduced. as a result,
While excavating with a mechanical stirring blade to expand the diameter even on hard ground,
It becomes possible to stir and knead the destroyed ground structure.
【００１３】ここで、交差噴流の交差半径は、注入され
たグラウト材が破壊された地盤組織の半径方向最外方と
機械撹拌ブレードの半径方向最外端部との間から逃げな
い程度であるため、グラウト材の浪費、及び無用のグラ
ウト材による環境汚染等が防止される。Here, the intersecting radius of the intersecting jet is such that the injected grout material does not escape from between the radially outermost part of the ground structure in which it was destroyed and the radially outermost end part of the mechanical stirring blade. Therefore, it is possible to prevent waste of grout material and environmental pollution due to unnecessary grout material.
【００１４】[0014]
【実施例】以下図面を参照して本発明の実施例を説明す
る。Embodiments of the present invention will be described below with reference to the drawings.
【００１５】図１において、回転軸１の下端には、掘削
ビット２が設けられている。その掘削ビット２の上方に
は、複段（図示の例では２段）の機械撹拌翼３が設けら
れ、これら撹拌翼３には、撹拌突部４と図示しないグラ
ウド材噴射口とが設けられている。その回転軸１の機械
撹拌翼３と掘削ビット２との間には、高圧水流や硬化材
水流ｊの交差噴流Ｊ、Ｊを噴射する複対のノズル５が設
けられている。そして、交差噴流Ｊ、Ｊの交差部Ｃの半
径Ｄは、撹拌翼３の半径ｄより若干量δだけ大きく形成
されている。 次に、作用について説明する。In FIG. 1, an excavation bit 2 is provided at the lower end of the rotary shaft 1. A multi-stage (two stages in the illustrated example) mechanical stirring blade 3 is provided above the excavation bit 2, and the stirring blade 3 is provided with a stirring projection 4 and a grout material injection port (not shown). ing. Between the mechanical stirring blade 3 of the rotary shaft 1 and the excavating bit 2, there are provided a pair of nozzles 5 for injecting the cross jets J of the high-pressure water stream and the hardening material water stream j. The radius D of the intersection C of the cross jets J, J is slightly larger than the radius d of the stirring blade 3 by an amount δ. Next, the operation will be described.
【００１６】施工に際し、回転軸１を回転しながら押し
下げる。すると、掘削ビット２により削孔が行われ、交
差噴流Ｊ、Ｊにより半径Ｄの範囲の地盤が切削撹拌さ
れ、地盤の組織が破壊される。したがって、地盤の硬
さ、すなわち砂質地盤ではＮ値が、粘土質地盤では粘着
力が減少し、撹拌翼３の回転抵抗が小さくなる。その結
果、硬い地盤に対し撹拌翼３により撹拌混練が可能とな
る。At the time of construction, the rotating shaft 1 is rotated and pushed down. Then, the excavation bit 2 drills holes, and the cross jets J, J cut and agitate the ground in the range of the radius D, and the structure of the ground is destroyed. Therefore, the hardness of the ground, that is, the N value in the sandy ground, the adhesive force in the clay ground, and the rotational resistance of the stirring blade 3 are reduced. As a result, the stirrer blade 3 can stir and knead the hard ground.
【００１７】交差部Ｃにおいて、交差噴流Ｊ、Ｊは衝突
してエネルギを失うので、地盤の正確な半径Ｄの範囲を
切削撹拌できると共に、高圧水の逃げが防止される。し
たがって、造成される混練杭の品質が向上される。At the intersection C, the cross jets J, J collide with each other and lose energy, so that the range of the accurate radius D of the ground can be cut and stirred, and the escape of the high pressure water is prevented. Therefore, the quality of the kneading pile to be formed is improved.
【００１８】図２は本発明の別の実施例を示し、交差噴
流Ｊ１を、高圧水流や硬化材水流ｊと、この高圧水流や
硬化材水流ｊを覆う空気流ｊ１とで形成した例である。
この実施例では、空気流ｊ１により切削能力を高めるこ
とができる。FIG. 2 shows another embodiment of the present invention, in which the cross jet J1 is formed by a high-pressure water stream or a hardening material water stream j and an air stream j1 covering the high-pressure water stream or the hardening material water stream j. .
In this embodiment, the cutting ability can be enhanced by the air flow j1.
【００１９】図３も本発明の別の実施例を示し、交差噴
流Ｊ２を、セメントや砂等の粉体を含んだ高圧流ｊ２
と、この高圧流ｊ２を覆う空気流ｊ１とで形成した例で
ある。この実施例では、更に切削能力を高めることがで
きる。FIG. 3 also shows another embodiment of the present invention, in which the cross jet J2 is a high pressure flow j2 containing powder such as cement or sand.
And an air flow j1 that covers the high-pressure flow j2. In this embodiment, the cutting ability can be further enhanced.
【００２０】[0020]
【発明の効果】本発明の作用効果を、以下に列挙する。The effects of the present invention are listed below.
【００２１】（１） 硬い地盤に対し施工を行うことが
できる。(1) Construction can be performed on hard ground.
【００２２】（２） 混練杭など造成体の品質を向上す
ることができる。(2) The quality of the formed body such as the kneading pile can be improved.
【００２３】（３） 単軸装置による施工のみならず、
多軸装置による施工にも適用可能である。(3) Not only construction using a single shaft device,
It can also be applied to construction using a multi-axis device.
【００２４】（４） グラウト材の浪費、及び無用のグ
ラウト材による環境汚染等が防止される。(4) Waste of grout material and environmental pollution due to unnecessary grout material can be prevented.
【図１】本発明の一実施例を示す側面図。FIG. 1 is a side view showing an embodiment of the present invention.
【図２】本発明の別の実施例を示す要部の側面図。FIG. 2 is a side view of a main part showing another embodiment of the present invention.
【図３】本発明の別の実施例を示す要部の側面図。FIG. 3 is a side view of a main part showing another embodiment of the present invention.
Ｃ・・・交差部 Ｊ、Ｊ１、Ｊ２、・・・交差噴流 ｊ・・・高圧水流又は硬化材水流 ｊ１・・・空気流 １・・・回転軸 ２・・・掘削ビット ３・・・機械撹拌翼 ４・・・撹拌突部 ５・・・ノズル C ... Intersection J, J1, J2, ... Cross jet j ... High pressure water stream or hardening material water stream j1 ... Air stream 1 ... Rotating shaft 2 ... Excavation bit 3 ... Machine Stirring blade 4 ... Stirring protrusion 5 ... Nozzle
Claims (3)
地盤を穿孔する工程と、掘削ビット上方の噴射ノズルか
ら高圧流体で構成された交差噴流を噴出し前記地盤を切
削撹拌して当該地盤の組織を破壊する工程と、噴射ノズ
ル上方の機械攪拌ブレードにより混合攪拌する工程とを
含み、前記交差噴流の交差部半径は機械撹拌ブレードの
半径より若干大きくすることを特徴とする機械撹拌工
法。1. A step of boring a ground by an excavation bit provided at a lower end of a rotating shaft, and a cross jet composed of high-pressure fluid is ejected from an injection nozzle above the excavation bit to cut and agitate the ground to stir the ground. A mechanical agitation method comprising the steps of destroying a tissue and mixing and agitating with a mechanical agitating blade above an injection nozzle, wherein a radius of an intersection of the cross jet is made slightly larger than a radius of the mechanical agitating blade.
体を包囲する様に噴射される空気流とにより構成された
請求項１の機械撹拌工法。2. The mechanical agitation method according to claim 1, wherein the cross jet comprises a high-pressure fluid and an air stream jetted so as to surround the high-pressure fluid.
と、該高圧流体を包囲する様に噴射される空気流とで構
成される請求項１の機械撹拌工法。3. The mechanical stirring method according to claim 1, wherein the cross jet comprises a high-pressure fluid containing powder and an air stream jetted so as to surround the high-pressure fluid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14134794A JP3494236B2 (en) | 1994-06-23 | 1994-06-23 | Mechanical stirrer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14134794A JP3494236B2 (en) | 1994-06-23 | 1994-06-23 | Mechanical stirrer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0813471A true JPH0813471A (en) | 1996-01-16 |
| JP3494236B2 JP3494236B2 (en) | 2004-02-09 |
Family
ID=15289856
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14134794A Expired - Fee Related JP3494236B2 (en) | 1994-06-23 | 1994-06-23 | Mechanical stirrer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3494236B2 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006144536A (en) * | 2004-10-19 | 2006-06-08 | Onoda Chemico Co Ltd | Ground improvement construction machine and ground improvement construction method |
| EP2535461A1 (en) | 2011-06-16 | 2012-12-19 | Keller Holding gmbh | Device and method for manufacturing floor elements |
| WO2021238603A1 (en) * | 2020-05-28 | 2021-12-02 | 上海久卓机电设备有限公司 | Micro-perturbation cutting, stirring and grouting system |
| CN113775298A (en) * | 2021-09-28 | 2021-12-10 | 水利部交通运输部国家能源局南京水利科学研究院 | A stirring head for in-situ solidification treatment of ultra-soft soil and using method thereof |
| CN115652914A (en) * | 2022-11-06 | 2023-01-31 | 上海渊丰地下工程技术有限公司 | Cross jet flow mixing-spraying pile construction equipment and construction method thereof |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103790152B (en) * | 2014-01-17 | 2015-09-09 | 株式会社N.I.T. | Pressure controllable in ground and without mud emission high pressure jet grouting system and construction method |
-
1994
- 1994-06-23 JP JP14134794A patent/JP3494236B2/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006144536A (en) * | 2004-10-19 | 2006-06-08 | Onoda Chemico Co Ltd | Ground improvement construction machine and ground improvement construction method |
| EP2535461A1 (en) | 2011-06-16 | 2012-12-19 | Keller Holding gmbh | Device and method for manufacturing floor elements |
| WO2021238603A1 (en) * | 2020-05-28 | 2021-12-02 | 上海久卓机电设备有限公司 | Micro-perturbation cutting, stirring and grouting system |
| CN113775298A (en) * | 2021-09-28 | 2021-12-10 | 水利部交通运输部国家能源局南京水利科学研究院 | A stirring head for in-situ solidification treatment of ultra-soft soil and using method thereof |
| CN115652914A (en) * | 2022-11-06 | 2023-01-31 | 上海渊丰地下工程技术有限公司 | Cross jet flow mixing-spraying pile construction equipment and construction method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3494236B2 (en) | 2004-02-09 |
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