JPH0523620Y2 - - Google Patents
Info
- Publication number
- JPH0523620Y2 JPH0523620Y2 JP1864186U JP1864186U JPH0523620Y2 JP H0523620 Y2 JPH0523620 Y2 JP H0523620Y2 JP 1864186 U JP1864186 U JP 1864186U JP 1864186 U JP1864186 U JP 1864186U JP H0523620 Y2 JPH0523620 Y2 JP H0523620Y2
- Authority
- JP
- Japan
- Prior art keywords
- air
- soil
- pipe
- air inlet
- stirring blade
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 239000002689 soil Substances 0.000 claims description 53
- 238000003756 stirring Methods 0.000 claims description 25
- 239000000463 material Substances 0.000 claims description 16
- 238000011084 recovery Methods 0.000 claims description 15
- 238000002347 injection Methods 0.000 claims description 12
- 239000007924 injection Substances 0.000 claims description 12
- 230000000630 rising effect Effects 0.000 claims description 5
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 238000013019 agitation Methods 0.000 claims 1
- 230000007423 decrease Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 239000011800 void material Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000011362 coarse particle Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Landscapes
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Description
【考案の詳細な説明】
〔産業上の利用分野〕
本考案は、土壌内で稼動させることにより、ス
ラリー状、粉粒状の地盤改良材を、圧縮空気によ
つて当該土壌中に噴出すると共に、これを攪拌し
て当該改良材を土壌と混合させ、かつこの際土壌
に向け噴出されたエヤーは、可及的に回収して大
気中へ放出させ、これにより軟弱地盤を改良する
のに用いられる攪拌装置に関する。[Detailed description of the invention] [Industrial application field] The present invention operates within the soil to eject a slurry or powdery ground improvement material into the soil using compressed air. This is stirred to mix the improvement material with the soil, and at this time, the air ejected towards the soil is recovered as much as possible and released into the atmosphere, which is used to improve soft ground. Regarding a stirring device.
既知のように、土壌改良材を空気圧送によつて
噴射ノズルから土中に噴射するこの種の地盤改良
装置にあつては、圧送エヤーが改良地盤に残留し
て、土の中で気泡を形成することとなり、当該気
泡の混入によつて、折角改良された地盤の強度が
低下してしまうこととなる。
As is known, in this type of soil improvement device that injects a soil improvement material into the soil from an injection nozzle using air pressure, the air being fed remains in the improved soil and forms air bubbles in the soil. As a result, the strength of the ground, which has been painstakingly improved, decreases due to the inclusion of air bubbles.
このような現象は、特に鋭敏比の高い粘土や、
粗粒分を含む砂質土の場合に生じ易いが、一般に
改良を必要とする地盤は、上記の如き土質を含む
各種の土質が互層となつていることが多いことか
ら、気泡残留を阻止するためのエヤー回収に高い
性能が要求されることとなる。 This phenomenon occurs especially in clays with high sensitivity ratios,
This tends to occur in sandy soils that contain coarse particles, but in general, the ground that requires improvement is often made up of alternating layers of various soil types, including those listed above, so air bubbles can be prevented from remaining. Therefore, high performance is required for air recovery.
ところが、従来のこの種装置は第７図のよう
に、地盤Ａ内に角形の回転パイプａを駆動回転さ
せながら深部まで進入させ、この際回転パイプａ
の供給路ｂに土壌改良材ｃを供給し、これを下端
のヘツドｄに開口した噴射ノズルｅから土中に噴
出すると同時に、同ヘツドｄから突設の土壌攪拌
翼ｆによつて、土壌改良材ｃを混合できるように
している。 However, as shown in Fig. 7, the conventional device of this type advances a rectangular rotating pipe a deep into the ground A while driving and rotating it, and at this time, the rotating pipe a
A soil improvement material c is supplied to the supply path b, and is ejected into the soil from an injection nozzle e opened at a head d at the lower end, and at the same time, soil improvement is carried out by a soil stirring blade f protruding from the same head d. Material c can be mixed.
従つて、角形の回転パイプａを回転させること
で、同図のｂによつて明示されるように同パイプ
ａと土壌Ａに穿設された円形孔Ｂの内壁面との間
に空隙ｇが形成され、この空隙ｇを通して、前記
土壌Ａ内に噴入された圧送エヤーｈが上昇し、外
気に放出されることになる。 Therefore, by rotating the rectangular rotary pipe a, a gap g is created between the pipe a and the inner wall surface of the circular hole B drilled in the soil A, as shown by b in the figure. Through this gap g, the pressurized air h injected into the soil A rises and is discharged to the outside air.
しかし、上記の場合は角パイプを用意しなえれ
ばならないので高価につくだけでなく、土壌の改
良深度が深くなつてきたり、可成りの軟弱地盤の
場合には、前記の空隙ｇを形成することが困難と
なり、従つて充分に圧送エヤーｈの外気放出、す
なわちエヤーの回収ができないこととなる。 However, in the above case, it is not only expensive because a square pipe must be prepared, but also when the soil improvement depth becomes deep or the ground is quite soft, it is necessary to form the above-mentioned void g. Therefore, it becomes difficult to sufficiently discharge the pressurized air h to the outside air, that is, to recover the air.
そこで第８図の如く角パイプを用いることなく
円形の回転パイプa1を用い、その外周壁から突設
した突出条ｉを縦設することで、この突出条ｉの
回転により空隙ｇを形成することも提案されてい
る。 Therefore, as shown in Fig. 8, a circular rotating pipe a1 is used instead of a square pipe, and a protruding strip i protruding from the outer peripheral wall is installed vertically, thereby forming a gap g by the rotation of the protruding strip i. It is also proposed that
この場合は、確かに円形パイプの使用ですむ利
点があり、前者よりも空隙ｇの形成は良好となる
ものの、やはり地盤が極度に軟弱であるときは、
上記の空隙ｇが閉塞状態となり、エヤー回収の用
をなさないこととなる。 In this case, it is true that a circular pipe can be used, and the formation of the void g is better than in the former case, but if the ground is extremely soft,
The above-mentioned gap g becomes closed and becomes useless for air recovery.
そこで、さらに第９図の通り回転パイプa2に内
挿固設した供給パイプｊから土壌改良材ｃを提供
して、土壌攪拌翼ｇに臨設の噴射ノズルｅから、
これを噴出するのであるが、このとき圧送空気ｈ
は、当該攪拌翼ｆの先端側に開口しているエヤー
導入口k1から、同攪拌翼ｆの上部に設けた導入路
k2、そして回転パイプa2と供給パイプｊとの間に
形成されているエヤー回収路k3を介して外気へ放
出させるようにしたものも、既に提案されてい
る。 Therefore, as shown in Fig. 9, the soil improvement material c is supplied from the supply pipe j inserted and fixed in the rotary pipe a2 , and the soil improvement material c is supplied from the temporary injection nozzle e installed on the soil stirring blade g.
This is blown out, and at this time the pressurized air h
is an air introduction passage provided at the top of the stirring blade f from the air inlet port k1 opened at the tip side of the stirring blade f.
It has already been proposed that the air be discharged to the outside air via the air recovery path k 3 formed between the rotary pipe a 2 and the supply pipe j.
これによれば、前記の欠陥を可成り解消するこ
とができるものの、この場合にあつては、エヤー
導入口k1が土壌攪拌翼ｆの回転と共に、回転する
こととなるから、エヤー導入口k1の近傍における
エヤーの静圧は低下することとなり、このこと
が、エヤーの円滑な外気への放出を阻害すること
となる難点がある。 According to this, the above-mentioned defects can be eliminated to a large extent, but in this case, since the air inlet k1 rotates with the rotation of the soil stirring blade f, the air inlet k1 The static pressure of the air in the vicinity of point 1 decreases, which poses a problem in that it prevents the air from being smoothly released into the outside air.
本考案は上記の従来例がもつ諸欠陥に鑑み、回
転パイプの外側に、非回転の固定外装パイプを配
すると共に、さらにその外側にエヤー回収用であ
るエヤー回収路を形成するだけでなく、上記回転
パイプの延出下端ヘツドに、土壌攪拌翼だけでな
く、その直上に空洞形成翼を設けるようにし、し
かもこの際空洞形成翼には、前記の非回転である
エヤー回収路におけるエヤー導入口を囲繞するよ
うに立上り先端片部を設定することで、エヤー導
入口を静止状態に保ち、かつ当該導入口の外周箇
所に空洞状態を保有させ得るようにして、土壌改
良材と共に土壌に送出されることとなる圧送エヤ
ーを、効率的に外気へ放出して、これを回収可能
とするのが、その目的である。
In view of the deficiencies of the above-mentioned conventional examples, the present invention not only arranges a non-rotating fixed exterior pipe outside the rotating pipe and also forms an air recovery path for air recovery outside of the rotating pipe. Not only the soil stirring blade but also a cavity forming blade is provided directly above the extending lower end head of the rotary pipe, and in this case, the cavity forming blade is provided with an air inlet in the non-rotating air recovery path. By setting the rising end piece to surround the air inlet, the air inlet can be kept stationary and a hollow state can be maintained around the outer periphery of the air inlet, so that the air can be delivered to the soil together with the soil improvement material. The purpose is to efficiently release the pumped air to the outside atmosphere so that it can be recovered.
本考案は上記の目的を達成するために、ベース
マシンに取り付けられる基部に、固定外装パイプ
を垂設し、この固定外装パイプ内に、動力部によ
つて回転駆動自在で、かつ土壌改良材を圧縮空気
により供給可能とした供給路をもつ回転パイプ
が、貫通状態で軸承され、上記固定外装パイプの
外側には、下端にエヤー導入口、上端にエヤー放
出口を開口したエヤー回収路を形成し、上記回転
パイプの延出下端ヘツドに、前記回転パイプの供
給路と連通して噴射ノズルに開口する連通路と、
当該噴射ノズルよりも外側まで横向突出の土壌攪
拌翼と、当該土壌攪拌翼の直上位にあつて、横向
きに突出させた複数の空洞形成翼とを夫々設け、
この空洞形成翼は、前記エヤー導入口の下位まで
延出して近設した横向基片部と、これに連続して
同上エヤー導入口よりも高所まで突出させた立上
り先端片部とにより形成されてなる軟弱地盤改良
用攪拌装置を提供しようとするものである。
In order to achieve the above object, the present invention has a fixed exterior pipe installed vertically on the base that is attached to the base machine, and inside this fixed exterior pipe, it can be freely rotated by a power section and a soil improvement material is installed. A rotary pipe having a supply path that can be supplied with compressed air is supported in a penetrating state, and an air recovery path is formed on the outside of the fixed exterior pipe with an air inlet at the lower end and an air outlet at the upper end. , a communication path at the extending lower end head of the rotary pipe that communicates with the supply path of the rotary pipe and opens to the injection nozzle;
A soil stirring blade that projects laterally to the outside of the injection nozzle, and a plurality of cavity forming blades that are located directly above the soil stirring blade and project laterally, are respectively provided,
This cavity-forming wing is formed by a horizontal base piece that extends to a lower level of the air inlet and is located close to the air inlet, and a rising tip piece that continues from this and projects higher than the air inlet. The purpose of this invention is to provide a stirring device for improving soft ground.
回転パイプに供給された土壌改良材は、同パイ
プの延出下端ヘツドに穿設された噴射ノズルか
ら、土壌内へ噴出され、土壌攪拌翼によつて土壌
と攪拌混合されると共に、このとき当該土壌中に
噴入された給送用の圧送エヤーは、その直上にあ
つて回転する空洞形成翼により形成されることと
なる空洞に流入した後、当該空洞に開口すること
となるエヤー導入口よりエヤー回収路へ流入し、
さらにそのエヤー放出口から外気へ放出されるこ
ととなつてエヤーの回収が行われる。
The soil improvement material supplied to the rotating pipe is injected into the soil from an injection nozzle drilled in the lower end head of the pipe, and is stirred and mixed with the soil by soil stirring blades. The compressed air for feeding that is injected into the soil flows into the cavity formed by the rotating cavity forming blades located directly above it, and then from the air inlet that opens into the cavity. Flows into the air recovery path,
Furthermore, the air is discharged to the outside air from the air discharge port, and the air is recovered.
本考案を図示の実施例によつて詳記すれば、第
６図のように別途用意されたベースマシン１に垂
持して用いられることとなるが、当該垂持箇所と
なる基部２の横向部２ａに固定外装パイプ３を、
縦向部２ｂに油圧モータなどによる原動機４を
夫々固設する。
If the present invention is described in detail with reference to the illustrated embodiment, it is used by being suspended on a separately prepared base machine 1 as shown in FIG. The fixed exterior pipe 3 is attached to the part 2a,
A prime mover 4 such as a hydraulic motor is fixedly installed in each vertical portion 2b.
上記固定外装パイプ３の軸心位置には、回軸パ
イプ５が、軸受６，６…によつて回転自在となる
よう貫通軸承されており、当該回転パイプ５の横
向部２ａから突出している上端部には、従動歯車
７ａが固設され、これに噛合する駆動歯車７ｂ
を、前記原動機４により駆動して、回転パイプ５
を回転させるようにしてあり、当該上端部にはス
イベルジヨイント８を介して改良材供給パイプ９
が連結されている。 A rotary pipe 5 is rotatably supported through bearings 6, 6, etc. at the axial center position of the fixed exterior pipe 3, and the upper end of the rotary pipe 5 protrudes from the horizontal portion 2a. A driven gear 7a is fixedly installed in the part, and a driving gear 7b that meshes with the driven gear 7a is fixedly attached to the driven gear 7a.
is driven by the prime mover 4 to rotate the rotating pipe 5.
The improvement material supply pipe 9 is connected to the upper end via a swivel joint 8.
are connected.
さらに上記固定外装パイプ３の外周壁には、縦
長曲帯１０ａ，１０ｂを縦装固設することによつ
て、両者で形成されるエヤー回収路１１，１１が
設けられ、この際下端にエヤー導入口１１ａ，１
１ａを、上端にエヤー放出口１１ｂを夫々開口さ
せるのである。 Further, on the outer peripheral wall of the fixed exterior pipe 3, air recovery passages 11, 11 formed by the vertically long curved bands 10a, 10b are provided by vertically fixing them, and at this time, air is introduced into the lower end. Mouth 11a, 1
The air discharge ports 11b are opened at the upper ends of each of the air holes 1a.
前記回転パイプ５の固定外装パイプ３から下方
へ突出している延出下端ヘツド１２は、図示例の
場合回転パイプ５の延出部１２ａと、その下端か
ら連設の倒立円錐状の先端部１２ｂとからなつて
おり、この際先端部１２ｂはスクリユー形とした
り、切削刃様のものでもよく、当該先端部１２ｂ
の側部上端からは、外側へ向け放射状に、所要複
数の土壌攪拌翼１３，１３…が横向突設されてい
ると共に、当該攪拌翼１３，１３…と同高位にあ
つて、同上先端部１２ｂに所要数の噴射ノズル１
３ａ，１３ａ…が穿設されており、当該ノズル１
３ａ，１３ａ…は、回転パイプ５の軸心に貫通す
る供給路５ａに連通させてある。 In the illustrated example, the extending lower end head 12 of the rotary pipe 5 that protrudes downward from the fixed exterior pipe 3 includes an extended portion 12a of the rotary pipe 5 and an inverted conical tip portion 12b continuous from the lower end thereof. In this case, the tip portion 12b may be screw-shaped or may be shaped like a cutting blade.
A required plurality of soil stirring blades 13, 13... are laterally protruded from the upper end of the side radially outward, and at the same height as the stirring blades 13, 13... the required number of injection nozzles 1
3a, 13a... are bored, and the nozzle 1
3a, 13a... are communicated with a supply path 5a penetrating the axis of the rotary pipe 5.
さらに、本考案では上記延出下端ヘツド１２の
基端側である延出部１２ａから、これまた放射状
に、しかも前記土壌攪拌翼１３，１３……の上端
縁と同高の下端縁となるよう直上に、所要数の空
洞形成翼１４，１４…を横向突設する。 Furthermore, in the present invention, the soil stirring blades 13, 13, etc. are arranged radially from the extending portion 12a, which is the proximal end side of the lower extending end head 12, and have a lower end edge that is at the same height as the upper end edge of the soil stirring blades 13, 13... Directly above, a required number of cavity forming wings 14, 14, . . . are provided to protrude laterally.
しかも、この際上記空洞形成翼１４，１４…
は、土壌攪拌翼１３，１３…よりも短かくしてあ
るだけでなく、前記エヤー導入口１１ａ，１１ａ
の下位まで延出して、しかもこれに近設した横向
基片部１４ａと、これに連続して前記縦長曲帯１
０ａ，１０ｂの外側に近接するように、エヤー導
入口１１ａ，１１ａよりも高所まで突出させた立
上り先端片部１４ｂとによつて形成するようにし
てある。 Moreover, at this time, the cavity forming blades 14, 14...
are not only shorter than the soil stirring blades 13, 13..., but also the air inlet ports 11a, 11a
The horizontal base piece 14a extends to a lower level and is located close to this, and the vertically long curved band 1 continues from this.
0a, 10b, and a rising end piece 14b protruding higher than the air introduction ports 11a, 11a.
そこで、上記のものを用いるには、ベースマシ
ン１の操作によつて、本攪拌装置を下降させなが
ら、原動機４によつて回転パイプ５を回転させ、
これにより延出下端ヘツド１２を土壌Ａ内にて回
転させ、かつ圧縮空気によつて土壌改良材を、改
良材供給パイプ９−回転パイプ５の供給路５ａ−
噴射ノズル１３ａ，１３ａ…の経路にて、土壌Ａ
内に噴出させ、このことで土壌改良材は、土壌攪
拌翼１３，１３により土壌Ａと共に攪拌混合され
ることになる。 Therefore, in order to use the above-mentioned device, the rotary pipe 5 is rotated by the prime mover 4 while the stirring device is lowered by operating the base machine 1.
As a result, the extending lower end head 12 is rotated in the soil A, and the soil improvement material is transferred from the improvement material supply pipe 9 to the supply path 5a of the rotary pipe 5 to the soil improvement material by compressed air.
Soil A in the path of the injection nozzles 13a, 13a...
As a result, the soil improvement material is agitated and mixed with the soil A by the soil stirring blades 13, 13.
そして、上記稼動により、もちろん空洞形成翼
１４，１４…も回転するので、これにより同翼１
４を半径とする円筒状の空洞が形成されることに
なり、上記噴射ノズル１３ａ，１３ａ…から土壌
Ａ内に噴出されたエヤーは、破線で示すように当
該空洞に進入し、さらに同空洞に開口するエヤー
導入口１１ａ，１１ａ…からエヤー回収路１１，
１１…に流入してエヤー放出口１１ｂより外気へ
放出されることとなるのであり、第５図の実線で
示す矢印は当該攪拌装置の稼動時における土の流
れを示している。 As a result of the above-mentioned operation, the cavity forming blades 14, 14, etc. also rotate.
A cylindrical cavity with a radius of 4 is formed, and the air ejected into the soil A from the injection nozzles 13a, 13a... enters the cavity as shown by the broken line, and further enters the cavity. Air recovery path 11,
11... and is discharged to the outside air from the air discharge port 11b, and the solid arrows in FIG. 5 indicate the flow of soil when the stirring device is in operation.
本考案は、上記のように構成されるものである
から、エヤー回収路１１，１１…のエヤー導入口
１１ａは回転せず静止状態となり、このため同口
１１ａの近傍における静圧が低下して、エヤー回
収路１１，１１…から外気へのエヤー放流が阻害
されることなく、土壌改良の効果を充分にあげ得
る。
Since the present invention is configured as described above, the air inlet ports 11a of the air recovery channels 11, 11, etc. do not rotate and are in a stationary state, so that the static pressure in the vicinity of the ports 11a decreases. , air discharge to the outside air from the air recovery channels 11, 11, .
また空洞形成翼１４，１４…により形成される
空洞が土壌攪拌翼１３，１３の直上に存し、しか
も当該空洞にエヤー導入口１１ａが開口されるの
で、土壌Ａに放出された圧送エヤーの外気連通路
が確保され、不本意な閉塞を生じないので、当該
エヤーが土壌中に残留して、当該改良の実をあげ
得ないといつた問題を解消することができる。 In addition, the cavity formed by the cavity forming blades 14, 14, . Since the communication path is secured and no unwanted blockage occurs, it is possible to solve the problem of the air remaining in the soil and making the improvement impossible.
第１図は本考案に係る軟弱地盤改良用攪拌装置
の縦断正面図、第２図と第３図は第１図の夫々
−線、−線横断面図、第４図は同装置の下
端側を示した斜視図、第５図は同装置の下端側に
よる土とエヤーの流れを示した縦断正面説明図、
第６図は同装置の使用状態を示した背面説明図、
第７図と第８図のａは夫々第１、第２従来例の縦
断正面説明図、同ｂは夫々第１、第２従来例のｂ
−ｂ線横断面図、第９図は第３従来例の下端側を
示す縦断正面説明図である。
１……ベースマシン、２……基部、３……固定
外装パイプ、４……原動機、５……回転パイプ、
５ａ……供給路、１０ａ，１０ｂ……縦長曲帯、
１１……エヤー回収路、１１ａ……エヤー導入
口、１１ｂ……エヤー放出口、１２……延出下端
ヘツド、１３……土壌攪拌翼、１３ａ……噴射ノ
ズル、１４……空洞形成翼、１４ａ……横向基片
部、１４ｂ……立上り先端片部。
Figure 1 is a longitudinal sectional front view of the stirring device for improving soft ground according to the present invention, Figures 2 and 3 are cross-sectional views taken along lines - and -, respectively, of Figure 1, and Figure 4 is the lower end side of the same device. Fig. 5 is a vertical cross-sectional front view showing the flow of soil and air through the lower end of the device.
FIG. 6 is an explanatory rear view showing how the device is used;
In FIGS. 7 and 8, a is a longitudinal cross-sectional front explanatory view of the first and second conventional examples, respectively, and b is a longitudinal cross-sectional front view of the first and second conventional examples, respectively.
9 is a vertical cross-sectional front view showing the lower end side of the third conventional example. 1... Base machine, 2... Base, 3... Fixed exterior pipe, 4... Prime mover, 5... Rotating pipe,
5a... Supply path, 10a, 10b... Vertically long curved belt,
11... Air recovery path, 11a... Air inlet, 11b... Air discharge port, 12... Extension lower end head, 13... Soil stirring blade, 13a... Injection nozzle, 14... Cavity forming blade, 14a ... Lateral base piece part, 14b... Rising tip piece part.
Claims (1)
外装パイプを垂設し、この固定外装パイプ内
に、動力部によつて回転駆動自在で、かつ土壌
改良材を圧縮空気により供給可能とした供給路
をもつ回転パイプが、貫通状態で軸承され、上
記固定外装パイプの外側には、下端にエヤー導
入口、上端にエヤー放出口を開口したエヤー回
収路を形成し、上記回転パイプの延出下端ヘツ
ドに、前記回転パイプの供給路と連通して噴射
ノズルに開口する連通路と、当該噴射ノズルよ
りも外側まで横向突出の土壌攪拌翼と、当該土
壌攪拌翼の直上位にあつて、横向きに突出させ
た複数の空洞形成翼とを夫々設け、この空洞形
成翼は、前記エヤー導入口の下位まで延出して
近設した横向基片部と、これに連続して同上エ
ヤー導入口よりも高所まで突出させた立上り先
端片部とにより形成されてなる軟弱地盤改良用
攪拌装置。 (2) エヤー導入口と、エヤー放出口をもつエヤー
回収路が、固定外装パイプの外周面と、これに
固設の縦長曲帯によつて形成されている実用新
案登録請求の範囲第１項記載の軟弱地盤改良用
攪拌装置。[Claims for Utility Model Registration] (1) A fixed exterior pipe is installed vertically on the base that is attached to the base machine, and the soil improvement material is compressed within the fixed exterior pipe, which can be freely rotated by a power unit. A rotary pipe having a supply path that can be supplied with air is supported in a penetrating state, and an air recovery path is formed outside the fixed exterior pipe with an air inlet at the lower end and an air outlet at the upper end, At the extending lower end head of the rotary pipe, there is provided a communication path that communicates with the supply path of the rotary pipe and opens to the injection nozzle, a soil stirring blade that projects laterally to the outside of the injection nozzle, and a soil stirring blade that is directly connected to the soil stirring blade. A plurality of cavity-forming blades are provided on the upper side and project laterally, and each of the cavity-forming blades extends to a lower part of the air inlet and is located close to the horizontal base piece, and a horizontal base piece part that extends to a lower part of the air inlet and is connected to the horizontal base piece. An agitation device for improving soft ground formed by a rising end piece protruding higher than the air inlet. (2) Scope of Utility Model Registration Claim 1, in which the air recovery path having an air inlet and an air outlet is formed by the outer peripheral surface of a fixed exterior pipe and a vertically curved band fixed thereto. The described stirring device for improving soft ground.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1864186U JPH0523620Y2 (en) | 1986-02-12 | 1986-02-12 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1864186U JPH0523620Y2 (en) | 1986-02-12 | 1986-02-12 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62133729U JPS62133729U (en) | 1987-08-22 |
| JPH0523620Y2 true JPH0523620Y2 (en) | 1993-06-16 |
Family
ID=30812498
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1864186U Expired - Lifetime JPH0523620Y2 (en) | 1986-02-12 | 1986-02-12 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0523620Y2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7515253B2 (en) | 2005-01-12 | 2009-04-07 | Kla-Tencor Technologies Corporation | System for measuring a sample with a layer containing a periodic diffracting structure |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6298192B1 (en) * | 2017-05-02 | 2018-03-20 | 株式会社エスエスティー協会 | How to create a concrete structure in the ground |
-
1986
- 1986-02-12 JP JP1864186U patent/JPH0523620Y2/ja not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7515253B2 (en) | 2005-01-12 | 2009-04-07 | Kla-Tencor Technologies Corporation | System for measuring a sample with a layer containing a periodic diffracting structure |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62133729U (en) | 1987-08-22 |
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