JPS58131219A - Ground improver using high-pressure double jet - Google Patents
Ground improver using high-pressure double jetInfo
- Publication number
- JPS58131219A JPS58131219A JP931083A JP931083A JPS58131219A JP S58131219 A JPS58131219 A JP S58131219A JP 931083 A JP931083 A JP 931083A JP 931083 A JP931083 A JP 931083A JP S58131219 A JPS58131219 A JP S58131219A
- Authority
- JP
- Japan
- Prior art keywords
- nozzle
- tube
- injection rod
- stirring blade
- rod
- 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】
本発明は軟弱地盤内に内外管からなる注入ロッドな挿入
し、内外管より硬化剤を高圧送し、注入ロッドの先端に
設けた攪拌羽根体からのノズルと側壁に設けたノズルか
ら噴射し、これを混和させて大口棒硬化層を造成するこ
とにより内部未改良部を残すことなく軟弱地ａｔ−改良
する地盤改良装置に関する◎
即ち、内外二重管からなる注入ロッド先端のヘッドに、
先端にノズルを設けた攪１羽根体と、外管側壁に設けた
ノズルから水平方向Ｋｒｊ化剤を高圧噴射しながら注入
ロッドを回転し、噴射された硬化剤を攪拌羽根体により
攪拌混和しながら上昇させて大口径円柱状硬化層を造成
し、しかも内部に未改良部を残すことなく造成する装置
を提供するものである。従来、軟刹地盤を改良する装置
は、注入ロッドの先端ヘッドの管側壁に設けたノズルか
ら硬化剤を噴射して改良を行なっている。また改良口径
を大きくするため噴射する硬化剤の到達範囲を広げるよ
うＫするには、注入圧を島めるがそのためにはエアーを
混入する手段及び氷圧縮空気等の補助力手段がとられて
いる。Detailed Description of the Invention The present invention involves inserting an injection rod consisting of an inner and outer tube into soft ground, delivering a hardening agent under high pressure from the inner and outer tubes, and applying the hardening agent to the nozzle and side wall from a stirring blade provided at the tip of the injection rod. Concerning a soil improvement device that improves soft ground without leaving any unimproved internal parts by injecting it from a provided nozzle and mixing it to create a hardened layer with a large rod. At the tip of the head,
The injection rod is rotated while injecting the Krj curing agent at high pressure in the horizontal direction from a stirring blade with a nozzle at the tip and a nozzle installed on the side wall of the outer tube, and the injected curing agent is stirred and mixed by the stirring blade. To provide an apparatus for creating a large-diameter cylindrical hardened layer by raising the hardened layer without leaving any unimproved parts inside. Conventionally, devices for improving soft ground have carried out the improvement by injecting a hardening agent from a nozzle provided on the side wall of the tube at the tip of the injection rod. In addition, in order to increase the range of the injected curing agent in order to increase the diameter of the improved aperture, the injection pressure must be reduced, but in order to do so, means of mixing air and auxiliary force means such as ice compressed air are taken. There is.
また２１！１１１４の硬化剤を別々に注入する手段とじ
て内外の二重管による注入が行なわれてきたが、しかし
、前記の注入圧の高圧化にも硬化層口径の拡大化には限
界を生じている。一方硬化剤の１１類も多様化し、単純
な二重管注入では目的を達し得なくなっている。In addition, as a means of separately injecting the curing agent of 21!1114, injection using an inner and outer double pipe has been used, but even with the above-mentioned high injection pressure, there is a limit to increasing the diameter of the hardened layer. It is occurring. On the other hand, class 11 curing agents have become more diverse, and simple double-tube injection can no longer achieve the purpose.
本発明は、内外管からなる二重管の先端ヘッドに横方向
に張出した攪拌羽根体な設け、この先端に設けたノズル
を内管と連絡させ、更に外管の側壁を通して夫々硬化剤
を高圧送して前記ノズルより噴射し、攪拌羽根体のノズ
ルより噴射する硬化剤で噴射半径を拡げ、更にその内側
を側壁に設けたノズルより硬化剤を噴射し、更にこの両
硬化剤を攪拌羽根体により混和して、攪拌羽根体より内
部側に未改良部を残さないようにして地盤を改良できる
ようにしたものである。The present invention is characterized in that a stirring blade body is provided at the tip end of a double tube consisting of an inner and outer tube, extending in the horizontal direction, a nozzle provided at the tip is connected to the inner tube, and a curing agent is applied under high pressure through the side wall of the outer tube. The curing agent is then injected from the nozzle, the injection radius is expanded by the curing agent injected from the nozzle of the stirring blade, the curing agent is further injected from a nozzle provided on the side wall on the inside, and both curing agents are injected into the stirring blade. It is possible to improve the ground by mixing it with the stirring blade so that no unimproved area is left inside the stirring blade body.
以下本発明に係る地盤改良装置の一実施例を添付図面に
基いて具体的に説明する。DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the ground improvement device according to the present invention will be described in detail below with reference to the accompanying drawings.
１は内管２と外管３からなる二重管注入ロッドでこの注
入ロッド１［は機体に支持されて縦設した案内板４に案
内される駆動装置５を上部に設け、この駆動装置２の駆
動で注入ロッド１に回転を伝えるようにしである。Reference numeral 1 denotes a double-tube injection rod consisting of an inner tube 2 and an outer tube 3, and this injection rod 1 is equipped with a drive device 5 at the top that is supported by the fuselage and guided by a vertically installed guide plate 4. Rotation is transmitted to the injection rod 1 by the drive of the injection rod 1.
駆動装置５は案内板４の上端部に設けた滑車６．７を介
してワイヤー８で吊持され昇降できるようにしである。The drive device 5 is suspended by a wire 8 via a pulley 6.7 provided at the upper end of the guide plate 4, so that it can be raised and lowered.
着た注入ロッドｌの上端には硬化剤圧送ホース９１０を
連結１．て前記内外管２．３に連絡させた二重管シイペ
ルを設け、下部の先端にはヘッド１２を連結しである。1. Connect a curing agent pressure feeding hose 910 to the upper end of the attached injection rod l. A double-pipe pipe pipe 2.3 is connected to the inner and outer pipes 2.3, and a head 12 is connected to the tip of the lower part.
ヘッド１２は、先端にノベルｎを設けた攪拌羽根体１４
を内管２に通じた通路２′と連絡させて横方向に張出し
て設けると共に攪拌羽根体１４の下部若しくは上部の側
壁に１外管３と連絡させた通路３′に通じたノズル１５
を設けであるＯｌたヘッド１２内に１金工部にスプリン
グ１６を作用させた逆止弁１７と、内管２に通じる通路
２′内に摺動弁１８をスプリング１９を作用させて設け
、一定圧以上になると摺動弁１８がスプリング１９に抗
して可動し攪拌羽根体１４の通路を開くようにしである
。The head 12 includes a stirring blade body 14 having a novel n at its tip.
A nozzle 15 is provided extending laterally in communication with a passage 2' communicating with the inner tube 2, and a nozzle 15 communicating with the passage 3' communicating with the outer tube 3 is provided on the lower or upper side wall of the stirring blade body 14.
A check valve 17 with a spring 16 acting on a metal part is provided in the oil head 12, and a slide valve 18 with a spring 19 acting in the passage 2' leading to the inner pipe 2 is provided. When the pressure exceeds the pressure, the sliding valve 18 moves against the spring 19 to open the passage of the stirring blade 14.
本発明は前記の構成で、注入ロッド：を所定位置におい
て下方若しくはノズル１５あるいはその双方から清水等
を噴射しながら地盤中に下降挿入する。地盤がある程度
硬い場合にはヘッド１２の先端及び羽根体１４に設けた
掘削刃で掘削しながら挿入するが、軟弱地盤の高い場合
はその必要がない。所定の深度に達したところで、圧送
ホース９１Ｏから夫々の内外管２．３に連絡した二重シ
イベル１１を介して、異なる種類の硬化剤を夫々高圧力
で圧送しつつ注入ロッド１に設けた羽根体１４の先端ノ
ズル１３と側壁に設けたノズル１５から水平方向に噴射
し、更に注入ロッドｌを駆動装置５により回転をあたえ
、その回転軌跡周辺の土壌を硬化剤の噴流と、攪拌羽根
ｌ／により強制攪拌し、円柱状の硬化層を造成する。The present invention has the above-mentioned configuration, and the injection rod is inserted downward into the ground at a predetermined position while spraying clean water or the like from below or from the nozzle 15 or both. If the ground is hard to some extent, the cutting blade provided on the tip of the head 12 and the blade body 14 is used to insert the tool while digging, but if the ground is soft and high, this is not necessary. When a predetermined depth is reached, different types of curing agents are pumped at high pressure through the double swivels 11 connected to the respective inner and outer tubes 2.3 from the pressure feed hose 91O. The injection rod 1 is injected horizontally from the tip nozzle 13 of the body 14 and the nozzle 15 provided on the side wall, and the injection rod 1 is further rotated by the drive device 5, and the soil around the rotation trajectory is treated with a jet of curing agent and a stirring blade 1/ The mixture is forcibly stirred to form a cylindrical hardened layer.
また例えば側壁に設けたノズルＩＳから１結性硬化剤、
羽根体１４の先端のノズル１３からは瞬結固
性硬化剤を噴射すれば外殻１が先づ〜結して外廓を造り
、これに核芯部すの緩結性軟化剤が入り込んで裏打ち混
和し離奨水のない強固な硬化層を造成することができる
０
ま、こ羽根体１４の先端と側壁のノズル１５から噴射す
るため大径口の造成ができる。Also, for example, from the nozzle IS provided on the side wall, 1 condensation curing agent,
When the flash-setting hardening agent is injected from the nozzle 13 at the tip of the blade body 14, the outer shell 1 first sets to form an outer shell, into which the slow-setting softening agent of the core part enters. It is possible to create a strong hardened layer with no separation water by mixing with the lining.Also, since it is injected from the nozzle 15 at the tip and side wall of the blade body 14, a large diameter opening can be created.
７面は本発明に係る地盤改良装置の一実施例を示すもの
で、第１図は側面図、第２図は第１図Ｘ−ｘの横断面図
、第３図は注入ロッドの先端ヘッド部の拡大断面図、第
４図はロッド壁面のノズルを羽根体の上部に付した場合
の断面図である。
１〜注入ロツド ２〜内管 ３外１Ｆ２′〜通路ｉ−道
路 ４〜案内板 ５駆動装［６％７〜滑車 ８〜ワイヤ
ー ９．１０〜圧送ホ一ス１１〜二重シイペル １２〜
ヘツド １３〜ノズル １４〜攪拌羽根体 １５〜ノズ
ル １６〜スプリング １７〜逆止弁 １８〜摺動弁
１９〜スプリング
第１図
第プ図Figure 7 shows an embodiment of the soil improvement device according to the present invention, where Figure 1 is a side view, Figure 2 is a cross-sectional view taken along line X-x in Figure 1, and Figure 3 is the tip head of the injection rod. FIG. 4 is an enlarged cross-sectional view of the rod wall when the nozzle is attached to the upper part of the blade body. 1 ~ Injection rod 2 ~ Inner pipe 3 Outside 1F 2' ~ Passage i-road 4 ~ Guide plate 5 Drive unit [6% 7 ~ Pulley 8 ~ Wire 9.10 ~ Pressure feed hose 11 ~ Double pipe 12 ~
Head 13 - Nozzle 14 - Stirring blade 15 - Nozzle 16 - Spring 17 - Check valve 18 - Sliding valve
19~Spring Figure 1 Figure 1
Claims (1)
える駆動装置を設け、注入ロッドの先端には、内管と連
絡したノズルを有する水平方向に張出した攪拌羽根体と
外管に通じた通路に連絡させたノズルに＠壁に設け、ま
た注入ロッドの上端には、前記内外管と夫々連絡し、か
つ内外管に夫々連絡させる硬化剤圧送ホースを接続させ
た二重シイベルを接続して設けてなる高圧二重噴射によ
る地盤改良装置A drive device is provided to rotate and vertically move the injection rod, which is made up of a double pipe with an inner and outer tube, and the tip of the injection rod has a horizontally projecting stirring blade body with a nozzle that communicates with the inner tube, and which communicates with the outer tube. A double swivel was connected to the nozzle connected to the passage connected to the wall, and a double swivel was connected to the upper end of the injection rod, to which a curing agent pressure feeding hose was connected, which communicated with the inner and outer tubes, respectively. A ground improvement device using high-pressure double injection installed in
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58009310A JPS5948248B2 (en) | 1983-01-25 | 1983-01-25 | Ground improvement device using high pressure double injection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58009310A JPS5948248B2 (en) | 1983-01-25 | 1983-01-25 | Ground improvement device using high pressure double injection |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP55124654A Division JPS5945049B2 (en) | 1980-09-10 | 1980-09-10 | Ground improvement method using high pressure double injection |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58131219A true JPS58131219A (en) | 1983-08-05 |
| JPS5948248B2 JPS5948248B2 (en) | 1984-11-26 |
Family
ID=11716899
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58009310A Expired JPS5948248B2 (en) | 1983-01-25 | 1983-01-25 | Ground improvement device using high pressure double injection |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5948248B2 (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01247611A (en) * | 1988-03-28 | 1989-10-03 | Tenotsukusu:Kk | Construction and device for foundation improvement with the joint use of agitator and jet |
| JPH0237937U (en) * | 1988-08-30 | 1990-03-13 | ||
| JPH0365731U (en) * | 1989-10-30 | 1991-06-26 | ||
| JPH0641943A (en) * | 1991-06-04 | 1994-02-15 | Nit Co Ltd | Large bore strong ground improved land formation device |
| JP2012158946A (en) * | 2011-02-02 | 2012-08-23 | Geo Kankyo Research Center Ltd | Formation device of underground pile |
| JP2018162593A (en) * | 2017-03-27 | 2018-10-18 | 大成建設株式会社 | Construction method of ground improvement body |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS50119413A (en) * | 1974-03-07 | 1975-09-18 | ||
| JPS5299612A (en) * | 1976-02-16 | 1977-08-20 | Wataru Nakanishi | Impregnation method with subsoil hardening liquid and so on |
| JPS5457706U (en) * | 1977-09-30 | 1979-04-21 | ||
| JPS5490812A (en) * | 1977-12-27 | 1979-07-18 | Kajima Corp | Grout injector |
-
1983
- 1983-01-25 JP JP58009310A patent/JPS5948248B2/en not_active Expired
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS50119413A (en) * | 1974-03-07 | 1975-09-18 | ||
| JPS5299612A (en) * | 1976-02-16 | 1977-08-20 | Wataru Nakanishi | Impregnation method with subsoil hardening liquid and so on |
| JPS5457706U (en) * | 1977-09-30 | 1979-04-21 | ||
| JPS5490812A (en) * | 1977-12-27 | 1979-07-18 | Kajima Corp | Grout injector |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01247611A (en) * | 1988-03-28 | 1989-10-03 | Tenotsukusu:Kk | Construction and device for foundation improvement with the joint use of agitator and jet |
| JPH0237937U (en) * | 1988-08-30 | 1990-03-13 | ||
| JPH0365731U (en) * | 1989-10-30 | 1991-06-26 | ||
| JPH0641943A (en) * | 1991-06-04 | 1994-02-15 | Nit Co Ltd | Large bore strong ground improved land formation device |
| JP2012158946A (en) * | 2011-02-02 | 2012-08-23 | Geo Kankyo Research Center Ltd | Formation device of underground pile |
| JP2018162593A (en) * | 2017-03-27 | 2018-10-18 | 大成建設株式会社 | Construction method of ground improvement body |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5948248B2 (en) | 1984-11-26 |
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