JPS6351515A - Excavator for ground improvement - Google Patents
Excavator for ground improvementInfo
- Publication number
- JPS6351515A JPS6351515A JP19487186A JP19487186A JPS6351515A JP S6351515 A JPS6351515 A JP S6351515A JP 19487186 A JP19487186 A JP 19487186A JP 19487186 A JP19487186 A JP 19487186A JP S6351515 A JPS6351515 A JP S6351515A
- Authority
- JP
- Japan
- Prior art keywords
- cylinder
- shaft
- ground improvement
- blades
- rotary
- 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.)
- Pending
Links
- 238000003756 stirring Methods 0.000 claims abstract description 24
- 238000009412 basement excavation Methods 0.000 claims description 5
- 238000005553 drilling Methods 0.000 claims 2
- 238000007599 discharging Methods 0.000 claims 1
- 239000003795 chemical substances by application Substances 0.000 abstract description 18
- 238000000034 method Methods 0.000 abstract description 2
- 239000010802 sludge Substances 0.000 abstract 1
- 239000002689 soil Substances 0.000 description 6
- 239000000203 mixture Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
Landscapes
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
この発明は地盤改良用掘削具に関するもので、土木機械
の分野に属する。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an excavating tool for soil improvement, and belongs to the field of civil engineering machinery.
（従来の技術）
従来、軟弱地盤を改良するには、掘削した地盤中に、硬
化剤を注入、撹拌する工法が採用されている。(Prior Art) Conventionally, in order to improve soft ground, a method of injecting and stirring a hardening agent into excavated ground has been adopted.
この地盤改良の為の掘削具としては、掘削刃と、撹拌翼
を備えた挿々の構造のものが提案されている（例えば特
開昭０ｌ−１０Ｇ２０号、特開昭６ｌ−１７Ｇ３１号、
特開昭ｆ３１−１７ｆ３３２号、特開昭６１−４０９１
７号等）。As excavating tools for this ground improvement, various structures equipped with excavating blades and stirring blades have been proposed (for example, JP-A-01-10G20, JP-A-6L-17G31,
JP-A No. 1983-17F332, JP-A No. 61-4091
No. 7, etc.).
（発明が解決しようとする問題点）
然し乍ら、従来の掘削具は、撹拌ｌが回転軸の下端部に
設けられた閘迭であったので、掘削した泥土と硬化剤を
十分に撹拌、混合する為には、撹拌翼を頻繁に上下させ
る必要があったと共に、撹拌翼の上下によって孔壁か傷
められる場合もある問題点があった。孔壁が傷められた
場合には、注入した硬化剤が孔壁の外側にも流出するの
で、それだけ硬化剤の注入量も多くしなければならない
が、必要な注入量を地上で把握することは難しく、改良
地温の性能にバラツキを生ずる場合があった。(Problem to be solved by the invention) However, in the conventional excavating tool, the stirring l was a lock installed at the lower end of the rotating shaft, so it was difficult to sufficiently stir and mix the excavated mud and hardening agent. In order to do this, it was necessary to move the stirring blade up and down frequently, and there was also the problem that the hole wall could be damaged by the up and down movement of the stirring blade. If the hole wall is damaged, the injected hardening agent will leak out to the outside of the hole wall, so the amount of hardening agent injected must be increased accordingly, but it is difficult to determine the required amount on the ground. This was difficult and sometimes caused variations in the performance of improved soil temperature.
（問題点を解決する為の手段）
そこでこの発明は、掘削した地盤中に筒体を貫入し、該
筒体内の略全長において掘削土と硬化剤の撹拌を行い得
るようにして、前記従来の問題点を解決したのである。(Means for solving the problem) Therefore, the present invention penetrates a cylindrical body into the excavated ground, and makes it possible to stir the excavated soil and hardening agent over almost the entire length of the cylindrical body, thereby improving the structure of the conventional method. It solved the problem.
即ちこの発明の地盤改良用掘削具は、下端部に、夫々掘
削刃を設けた回転筒と回転軸が同軸で、かつ互いに回転
可能としてあると共に、回転筒の内側と回転軸の外側に
、略全長に亘って互いに遊合する撹拌翼か突設してあり
、かつ前記回転軸の下端部に硬化剤の放出部が設けてあ
ることを特徴としている。That is, the ground improvement excavating tool of the present invention has a rotary cylinder provided with a cutting blade at its lower end and a rotary shaft that are coaxial and rotatable with respect to each other, and there are approximately The apparatus is characterized in that stirring blades are protruded over the entire length and are loose with each other, and a curing agent discharge part is provided at the lower end of the rotating shaft.
前記回転筒の掘削刃は、回転筒に着脱可能とした筒状ア
タッチメントの端部外側に、刃体を放射状に突設した構
成とすることが望ましく、筒状アクソチメントの内径を
、回転筒の径と略同−としたり、回転筒の径より小さい
径として、回転筒内に導かれる掘削土の量を制即するこ
とができる。It is preferable that the excavating blade of the rotary tube has a blade protruding radially from the outside of the end of a cylindrical attachment that is detachable from the rotary tube, and the inner diameter of the cylindrical axotiment is set to the diameter of the rotary tube. The amount of excavated soil introduced into the rotary cylinder can be controlled by making the diameter approximately equal to or smaller than the diameter of the rotary cylinder.
撹拌Ｘは、回転筒の内側に設けた撹拌翼と回転軸の外側
に設けた撹拌翼とがオーバーラツプするような関係とす
れば良いが、夫々の長さを、回転筒の内側より回転軸の
外側までの距離と略等しくすることによって、撹拌能力
な最大とすることができる。Stirring By making the distance approximately equal to the distance to the outside, the stirring capacity can be maximized.
又、回転軸は、中空軸とするのが望ましく、下４１部に
ノズルを連設することによって、硬化剤の注入経路を構
成することができる。Further, the rotating shaft is preferably a hollow shaft, and by connecting a nozzle to the lower portion 41, an injection path for the curing agent can be formed.
（作 用）
この発明の地盤改良用掘削具によれば、撹拌■を回転筒
および回転軸の略全長に亘って設けたので、地表より地
中に亘る範囲において、泥土と硬化剤を均一に混合する
ことかてできる。又、掘削した泥土と硬化剤は回転筒の
内側で混合するので、所望の混合比とすることができる
。(Function) According to the excavating tool for ground improvement of the present invention, since the stirring part is provided over almost the entire length of the rotating tube and rotating shaft, the mud and hardening agent can be uniformly mixed in the range from the surface of the ground to the depths of the ground. Can be mixed. Furthermore, since the excavated mud and hardening agent are mixed inside the rotary cylinder, a desired mixing ratio can be achieved.
（実施例）
以下この発明の実施例を図面を参照して説明する０図中
１は刑管でなる回転筒で、該回転筒１の中心軸上に、中
空の回転軸２が配置してあり、回転筒１の頂板３を貫通
して上方に突出しである。(Example) Examples of the present invention will be described below with reference to the drawings. 1 in the figure is a rotary tube made of a penetrating tube, and a hollow rotating shaft 2 is disposed on the central axis of the rotary tube 1. It penetrates the top plate 3 of the rotary cylinder 1 and protrudes upward.
前記回転筒１の内壁には、所定の間隔毎に撹拌翼４．４
が中心に向けて突設しであると共に、回転！Ｆ！ｆ１２
の外壁にも同様に撹拌翼５．５が放射状に突設してあり
、撹拌ｘ４．４と撹拌翼５．５とが互いに遊合させであ
る。各撹拌翼４．５の長さは、回転筒１の内壁より回転
軸２の外壁までの長さと略等しくしである。Stirring blades 4.4 are installed at predetermined intervals on the inner wall of the rotating cylinder 1.
protrudes toward the center and rotates! F! f12
Similarly, stirring blades 5.5 are provided radially protruding from the outer wall of the stirring blade 5.5, and the stirring blades 5.5 and 4.4 are loosely interlocked with each other. The length of each stirring blade 4.5 is approximately equal to the length from the inner wall of the rotating cylinder 1 to the outer wall of the rotating shaft 2.
回転筒１の下端部には、第３図に示した如くの筒状アタ
ッチメント６が嵌装され、ボルト７により固定しである
。筒状アタッチメント６は、下部内径が回転筒１の内径
より若干小径としである一方、下部外！２６ａはテーパ
ー状としてあり、根部に複数の刃体８．８を放射状に固
着して、回転筒１の掘削刃を構成している。A cylindrical attachment 6 as shown in FIG. 3 is fitted into the lower end of the rotary cylinder 1 and fixed with bolts 7. The inner diameter of the lower part of the cylindrical attachment 6 is slightly smaller than the inner diameter of the rotary cylinder 1, while the outside of the lower part! 26a has a tapered shape, and a plurality of blade bodies 8.8 are radially fixed to the root portion thereof to constitute the excavation blade of the rotary cylinder 1.
一方、回転軸２の下端部には、旋回翼９．９が直径対称
的に固着され、該旋回翼９の下端縁に沿って、刃体１０
．１０を固着して、回転軸２の掘削刃を構成している。On the other hand, a swirler 9.9 is diametrically symmetrically fixed to the lower end of the rotating shaft 2, and a blade 10 is attached along the lower edge of the swirler 9.
．． 10 is fixed to constitute the excavating blade of the rotating shaft 2.
ス、回転軸２の下端延長上にはノズル１１が連設してあ
り、回転軸２の上端側より注入した硬化剤は、ノズル１
１より土中に放出できるようになっている。A nozzle 11 is connected to the extension of the lower end of the rotating shaft 2, and the curing agent injected from the upper end of the rotating shaft 2 is passed through the nozzle 1.
1, it can be released into the soil.
上記実施例の掘削具は、第１図に図示したように、回転
装置１２に連結し、回転筒１と回転ＩＦＩ］２を互いに
逆方向に回転させて使用する９回転筒１の下端に設けた
掘削刃と回転軸２の下端に設けた掘削刃によって、改良
すべき地盤が掘削され、掘削具全体は、掘削に従って地
盤に貫入して行く。As shown in FIG. 1, the excavation tool of the above embodiment is provided at the lower end of a nine-rotary tube 1 that is connected to a rotating device 12 and used by rotating the rotary tube 1 and the rotary IFI 2 in opposite directions. The ground to be improved is excavated by the excavating blade provided at the lower end of the rotary shaft 2, and the entire excavating tool penetrates into the ground as it excavates.
貫入に当って、筒状アタッチメント６の下部内径に見合
った量の泥土が回転筒１の内側に流入するので、回転軸
２を通してノズル１１より硬化剤を放出すれば、泥土と
硬１ヒ剤は、回転筒１の内側で、撹拌翼４．４．５．５
によって均一に混合される。At the time of penetration, an amount of mud corresponding to the inner diameter of the lower part of the cylindrical attachment 6 flows into the inside of the rotary cylinder 1, so if the hardening agent is discharged from the nozzle 11 through the rotating shaft 2, the mud and hardening agent are removed. , inside the rotating cylinder 1, stirring blades 4.4.5.5
The mixture is evenly mixed.
この場合硬化剤と泥土は回転筒１で仕切られた領域で撹
拌、混合されるので、注入した全硬化剤と、回転筒１の
内側に流入した泥土を十分に混合することができると共
に、地表より掘削刃に至る範囲において撹拌するので、
全体を均一にすることができ、設計通りの混合比による
地盤改良工事を行うことができる。In this case, the hardening agent and mud are stirred and mixed in the area partitioned by the rotary cylinder 1, so that all the hardening agent injected and the mud that has flowed into the inside of the rotary cylinder 1 can be sufficiently mixed, and the soil surface Since it stirs in the area that reaches the digging blade,
It is possible to make the entire mixture uniform, and ground improvement work can be carried out using the designed mixture ratio.
掘削具が予定の深さまで貫入したら、回転筒１および回
転軸２を回転しながら引抜き、次の地点で同様の操作を
行う。When the excavation tool penetrates to the planned depth, it is pulled out while rotating the rotary tube 1 and the rotary shaft 2, and the same operation is performed at the next point.
（発明の効果）
以上に説明した通り、この発明によれば、掘削した泥土
と注入した硬化剤を均一に混合できると共に、混合比も
制御できるので、設計通りの地盤改良工事ができると共
に、改良した性能も均一にできるなどの効果がある。(Effects of the Invention) As explained above, according to the present invention, the excavated mud and the injected hardening agent can be mixed uniformly, and the mixing ratio can also be controlled. This has the effect of making the performance uniform.
第１図はこの発明の実施例の一部を破切した正面図、第
２図は第１図中Ａ−Ａ線における断面図、第３図は実施
例における筒状アタッチメントの下 ゛側斜親図である
。
１・・・回転筒 ２・・・回転軸１１．５・・
・撹拌翼 ６・・・筒状ノズル８．１０・・・刃体
１１・・・ノズル１２・・・回転装置Fig. 1 is a partially cutaway front view of an embodiment of the present invention, Fig. 2 is a sectional view taken along line A-A in Fig. 1, and Fig. 3 is a lower side oblique view of the cylindrical attachment in the embodiment. This is the parent diagram. 1... Rotating cylinder 2... Rotating shaft 11.5...
- Stirring blade 6... Cylindrical nozzle 8.10... Blade body 11... Nozzle 12... Rotating device
Claims (1)
軸で、かつ互いに回転可能としてあると共に、回転筒の
内側と、回転軸の外側に、略全長に亘って互いに遊合す
る撹拌翼が突設してあり、かつ前記回転軸の下端部に硬
化剤の放出部が設けてあることを特徴とした地盤改良用
掘削具 ２ 回転筒の掘削刃は、回転筒に着脱可能とした筒状ア
タッチメントの端部外側に刃体を放射状に突設した特許
請求の範囲第１項記載の地盤改良用掘削具 ３ 筒状アタッチメントの内径は、回転筒の径と略同一
、又は小さい径とした特許請求の範囲第２項記載の地盤
改良用掘削具 ４ 撹拌翼は、回転筒の内側より回転軸の外側までの距
離と略等しくした特許請求の範囲第１項記載の地盤改良
用掘削具 ５ 回転軸は、中空軸とし、下端部に硬化剤を放出する
為のノズルを連設した特許請求の範囲第１項記載の地盤
改良用掘削具[Scope of Claims] 1. A rotary cylinder, each having a cutting blade at its lower end, and a rotary shaft are coaxial and rotatable with respect to each other. An excavating tool for ground improvement 2 characterized by protruding stirring blades that play with each other and a curing agent release part provided at the lower end of the rotating shaft. Excavation tool 3 for ground improvement according to claim 1, wherein a blade body is radially protruded outside the end of a cylindrical attachment that can be attached to and detached from the cylinder.The inner diameter of the cylindrical attachment is approximately equal to the diameter of the rotating cylinder. Excavation tool 4 for ground improvement according to claim 2, which has the same or smaller diameter. Claim 1, wherein the stirring blade has a distance approximately equal to the distance from the inside of the rotating cylinder to the outside of the rotating shaft. Ground improvement drilling tool 5 The ground improvement drilling tool according to claim 1, wherein the rotating shaft is a hollow shaft, and a nozzle for discharging a hardening agent is connected to the lower end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19487186A JPS6351515A (en) | 1986-08-20 | 1986-08-20 | Excavator for ground improvement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19487186A JPS6351515A (en) | 1986-08-20 | 1986-08-20 | Excavator for ground improvement |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6351515A true JPS6351515A (en) | 1988-03-04 |
Family
ID=16331691
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19487186A Pending JPS6351515A (en) | 1986-08-20 | 1986-08-20 | Excavator for ground improvement |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6351515A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02132735U (en) * | 1989-04-06 | 1990-11-05 | ||
| JPH03125712A (en) * | 1989-10-12 | 1991-05-29 | Shohei Senda | Poor subsoil improvement method and device |
| JPH03140520A (en) * | 1989-10-25 | 1991-06-14 | Yoshihiro Ota | Method and device for improving soft ground |
| JPH0477631U (en) * | 1990-11-10 | 1992-07-07 | ||
| JP2020176444A (en) * | 2019-04-18 | 2020-10-29 | 株式会社フジタ | Agitation device and ground improvement method for pile embedding hole |
| JP2021011679A (en) * | 2019-07-03 | 2021-02-04 | 株式会社フジタ | Agitation device and ground improvement method of pile burying hole |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5820819A (en) * | 1981-07-28 | 1983-02-07 | N I T:Kk | Method and apparatus for injecting grout into ground |
| JPS5924026A (en) * | 1982-07-30 | 1984-02-07 | Kaitoku Kigyo:Kk | Pile formation work |
-
1986
- 1986-08-20 JP JP19487186A patent/JPS6351515A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5820819A (en) * | 1981-07-28 | 1983-02-07 | N I T:Kk | Method and apparatus for injecting grout into ground |
| JPS5924026A (en) * | 1982-07-30 | 1984-02-07 | Kaitoku Kigyo:Kk | Pile formation work |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02132735U (en) * | 1989-04-06 | 1990-11-05 | ||
| JPH03125712A (en) * | 1989-10-12 | 1991-05-29 | Shohei Senda | Poor subsoil improvement method and device |
| JPH03140520A (en) * | 1989-10-25 | 1991-06-14 | Yoshihiro Ota | Method and device for improving soft ground |
| JPH0477631U (en) * | 1990-11-10 | 1992-07-07 | ||
| JP2020176444A (en) * | 2019-04-18 | 2020-10-29 | 株式会社フジタ | Agitation device and ground improvement method for pile embedding hole |
| JP2021011679A (en) * | 2019-07-03 | 2021-02-04 | 株式会社フジタ | Agitation device and ground improvement method of pile burying hole |
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