JPS6251328B2 - - Google Patents
Info
- Publication number
- JPS6251328B2 JPS6251328B2 JP56067489A JP6748981A JPS6251328B2 JP S6251328 B2 JPS6251328 B2 JP S6251328B2 JP 56067489 A JP56067489 A JP 56067489A JP 6748981 A JP6748981 A JP 6748981A JP S6251328 B2 JPS6251328 B2 JP S6251328B2
- Authority
- JP
- Japan
- Prior art keywords
- stabilizer
- stirring blade
- ground
- compressed air
- pressure
- 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
Links
- 239000003381 stabilizer Substances 0.000 claims description 20
- 238000003756 stirring Methods 0.000 claims description 16
- 239000002689 soil Substances 0.000 claims description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- 238000007599 discharging Methods 0.000 claims description 3
- 239000007788 liquid Substances 0.000 claims description 2
- 238000000034 method Methods 0.000 claims 1
- 238000010276 construction Methods 0.000 description 2
- 230000001174 ascending effect Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000008267 milk Substances 0.000 description 1
- 210000004080 milk Anatomy 0.000 description 1
- 235000013336 milk Nutrition 0.000 description 1
- 231100000989 no adverse effect Toxicity 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 230000003313 weakening effect Effects 0.000 description 1
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)
Description
【発明の詳細な説明】
軟弱地盤中に液状の地盤安定剤（セメントミル
ク等、以下単に安定剤という）を吐出し、撹拌翼
で地盤土壌と撹拌混合して軟弱地盤を改良する技
術は既知であるが、安定剤をそのまま高圧で噴射
させる従来方式では、安定剤の噴出圧力が地盤の
土水圧に直接対抗して吐出がなされることから、
どうしても安定剤の噴射距離にむらが生じ、安定
した吐出が望めないという問題点があつた。[Detailed Description of the Invention] There is a known technology for improving soft ground by discharging a liquid ground stabilizer (cement milk, etc., hereinafter simply referred to as stabilizer) into soft ground and stirring and mixing it with the ground soil using a stirring blade. However, in the conventional method of injecting the stabilizer as it is at high pressure, the jetting pressure of the stabilizer directly opposes the soil water pressure in the ground.
There was a problem in that the spray distance of the stabilizer inevitably became uneven and stable discharge could not be expected.
本発明は、逆Ｕ字状に形成した撹拌翼内を撹拌
翼が位置する地盤深度における土水圧に対抗する
圧力の圧縮空気で満たしておき、この圧縮空気の
圧力で地盤土壌を押さえた状態の所に安定剤を吐
出することにより、前記問題点の解決を図つたも
のである。 In the present invention, the stirring blade formed in an inverted U-shape is filled with compressed air at a pressure that opposes the soil water pressure at the depth of the ground where the stirring blade is located, and the ground soil is held down by the pressure of this compressed air. This problem is solved by discharging a stabilizer at certain locations.
以下、本発を更に具体的に説明する。 The present invention will be explained in more detail below.
本発明の実施には例えば図示のような装置を用
いるが、この装置において、１は回転軸であつ
て、施工機８に懸吊された回転駆動機２から下方
に延び、下端に撹拌翼３を具えている。 For example, a device as shown in the drawings is used to carry out the present invention. In this device, reference numeral 1 denotes a rotating shaft, which extends downward from a rotary drive device 2 suspended from a construction machine 8, and has stirring blades 3 at its lower end. It is equipped with
回転軸１は中空で、中を安定剤供給管４が通つ
ており、安定剤供給管４の上端には、図示しない
スイベル機構を介して安定剤供給ホース４′が連
結されている。安定剤供給管４の下端は断面逆Ｕ
字状の撹拌翼３内に延びており、この部分の下側
の管壁には複数の吐出口９が穿設されている。 The rotating shaft 1 is hollow, and a stabilizer supply pipe 4 passes through it, and a stabilizer supply hose 4' is connected to the upper end of the stabilizer supply pipe 4 via a swivel mechanism (not shown). The lower end of the stabilizer supply pipe 4 has an inverted U cross section.
It extends inside the letter-shaped stirring blade 3, and a plurality of discharge ports 9 are bored in the tube wall below this portion.
回転軸１と安定剤供給管４との間の空隙は、回
転軸１の上方部分においてスイベル６を介して圧
縮空気供給ホース５に連通している。 The gap between the rotating shaft 1 and the stabilizer supply pipe 4 communicates with a compressed air supply hose 5 via a swivel 6 in the upper part of the rotating shaft 1 .
作業中、回転駆動機２は施工機８のリーダー７
に沿つて下降若しくは上昇しつつ回転軸１を回転
させる。そして、同時に吐出口９から安定剤が吐
出されて回転する撹拌翼３により地盤土壌と撹拌
混合される。 During work, the rotary drive machine 2 is the leader 7 of the construction machine 8.
The rotating shaft 1 is rotated while descending or ascending along the axis. At the same time, the stabilizer is discharged from the discharge port 9 and stirred and mixed with the ground soil by the rotating stirring blade 3.
本発明では、安定剤の吐出は、圧縮空気供給ホ
ース５から送られた圧縮空気で断面逆Ｕ字状の撹
拌翼３内を満たした状態でなされるが、この圧縮
空気の圧力は撹拌翼３が位置する地盤深度におけ
る土水圧に略々等しくし、圧縮空気は、撹拌翼３
内を満たしているが、外（地盤中）には吐出され
ないようにする。 In the present invention, the stabilizer is discharged while the stirring blade 3 having an inverted U-shaped cross section is filled with compressed air sent from the compressed air supply hose 5. The compressed air is approximately equal to the soil water pressure at the ground depth where the stirring blade 3 is located.
It fills the inside, but does not discharge to the outside (into the ground).
この状態で安定剤の吐出圧力を圧縮空気圧力よ
り僅かに大きくすれば、安定剤は吐出口９から地
盤土壌に向かつて恰も大気中と同様な態様で吐出
される。 In this state, if the discharge pressure of the stabilizer is made slightly higher than the compressed air pressure, the stabilizer will be discharged from the discharge port 9 toward the ground soil in the same manner as in the atmosphere.
以上の説明から明らかなように、本発明では、
断面逆Ｕ字状の撹拌翼内を圧縮空気で満たし、こ
の圧縮空気圧力で撹拌翼が位置する地盤深度にお
ける土水圧に対抗させた状態の下で安定剤の吐出
を行うので、安定剤の安定した吐出が可能で正確
な施工が行なえるのみならず、吐出口の目詰まり
も生じにくく、しかも、圧縮空気を用いてもこれ
を地盤中に吐出するのではないから、改良地盤を
気泡入りのものとして強度を弱める等の弊害はな
い。 As is clear from the above description, in the present invention,
The inside of the stirring blade, which has an inverted U-shaped cross section, is filled with compressed air, and the stabilizer is discharged under conditions where the compressed air pressure opposes the soil water pressure at the depth of the ground where the stirring blade is located, so the stabilizer is stabilized. Not only can the discharge be carried out accurately, the discharge port is less likely to become clogged, and even if compressed air is used, it is not discharged into the ground. There is no adverse effect such as weakening the strength of the product.
第１図は本発明の実施に用いる装置の一例を示
す概略側面図、第２図は同装置の撹拌翼部分の拡
大図である。
１…回転軸、２…回転駆動機、３…撹拌翼、４
…安定剤供給管、４′…安定剤供給ホース、５…
圧縮空気供給ホース、９…吐出口。
FIG. 1 is a schematic side view showing an example of an apparatus used for carrying out the present invention, and FIG. 2 is an enlarged view of the stirring blade portion of the apparatus. 1... Rotating shaft, 2... Rotating drive machine, 3... Stirring blade, 4
...Stabilizer supply pipe, 4'...Stabilizer supply hose, 5...
Compressed air supply hose, 9...discharge port.
Claims (1)
拌翼内の吐出口から吐出させる際に、断面逆Ｕ字
状の撹拌翼内を撹拌翼が位置する地盤深度におけ
る土水圧に対抗する圧力の圧縮空気で満たしてお
くことを特徴とする軟弱地盤改良工法。1. When discharging a liquid ground stabilizer from the discharge port in a stirring blade rotating in soft ground, pressure is applied inside the stirring blade, which has an inverted U-shape in cross section, to counteract soil water pressure at the depth of the ground where the stirring blade is located. A soft ground improvement method characterized by filling the air with compressed air.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6748981A JPS57184120A (en) | 1981-05-02 | 1981-05-02 | Improvement work for soft ground |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6748981A JPS57184120A (en) | 1981-05-02 | 1981-05-02 | Improvement work for soft ground |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57184120A JPS57184120A (en) | 1982-11-12 |
| JPS6251328B2 true JPS6251328B2 (en) | 1987-10-29 |
Family
ID=13346439
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6748981A Granted JPS57184120A (en) | 1981-05-02 | 1981-05-02 | Improvement work for soft ground |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57184120A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE1006153A3 (en) * | 1992-09-15 | 1994-05-24 | Smet Hugo | Method for stabilising or fixing silt or silt-containing ground on site |
| JP2013108299A (en) * | 2011-11-22 | 2013-06-06 | San & Shii Consultant Kk | Soil improvement method for preventing liquefaction upon earthquake |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5076777A (en) * | 1973-11-08 | 1975-06-23 | ||
| JPS5091110A (en) * | 1973-12-18 | 1975-07-21 |
-
1981
- 1981-05-02 JP JP6748981A patent/JPS57184120A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5076777A (en) * | 1973-11-08 | 1975-06-23 | ||
| JPS5091110A (en) * | 1973-12-18 | 1975-07-21 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57184120A (en) | 1982-11-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4028009A (en) | Jet pump | |
| EP0151526A2 (en) | Apparatus for soil stabilisation | |
| US4125331A (en) | Mixing apparatus | |
| US4586823A (en) | Device for mixing and applying wet concrete | |
| JPS61111561U (en) | ||
| US2360803A (en) | Vibrator device | |
| JPH03449B2 (en) | ||
| JPS6251328B2 (en) | ||
| IE61696B1 (en) | Center-filled chewing gum, method and apparatus for making same | |
| JPS589208B2 (en) | Powder injection device for ground improvement | |
| JP2004160391A (en) | Method of improving soil quality | |
| JP3003538B2 (en) | Construction method of mud solidification wall | |
| JPS6353327B2 (en) | ||
| CN212295529U (en) | Mortar spraying and smearing device | |
| CN217462187U (en) | Layered surrounding rock tunnel structure disease treatment vehicle device | |
| JP3019752B2 (en) | Construction method of mud solidified wall | |
| CN220908071U (en) | Sand and stone curing agent spraying and conveying device | |
| CN210999415U (en) | Concrete prefabricated component pouring device | |
| CN216031622U (en) | Cement mortar stirring device | |
| JPS61282514A (en) | Soft ground improvement work | |
| JPH05202514A (en) | Ground improvement | |
| JPS60358Y2 (en) | Stirring device for improving soft ground | |
| SU28644A1 (en) | Apparatus for mixing and pneumatic supply of mortar | |
| JPS5824022A (en) | Method and apparatus for improving soft ground under water | |
| JPH0310232Y2 (en) |