JPH0452805B2 - - Google Patents
Info
- Publication number
- JPH0452805B2 JPH0452805B2 JP7029485A JP7029485A JPH0452805B2 JP H0452805 B2 JPH0452805 B2 JP H0452805B2 JP 7029485 A JP7029485 A JP 7029485A JP 7029485 A JP7029485 A JP 7029485A JP H0452805 B2 JPH0452805 B2 JP H0452805B2
- Authority
- JP
- Japan
- Prior art keywords
- ground
- nozzle
- cylindrical
- soil
- injection port
- 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
- 238000002347 injection Methods 0.000 claims description 8
- 239000007924 injection Substances 0.000 claims description 8
- 239000002689 soil Substances 0.000 claims description 7
- 230000003014 reinforcing effect Effects 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 4
- 230000015572 biosynthetic process Effects 0.000 claims 1
- 239000004570 mortar (masonry) Substances 0.000 description 4
- 239000004568 cement Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000011083 cement mortar Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
Description
【発明の詳細な説明】
本発明は、軟弱地盤の強度を高めるための工法
に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a construction method for increasing the strength of soft ground.
軟弱地盤の特徴は密度が低く、含水比が大き
く、また、有機質土の場合もあり、土質改良に問
題がある。 Soft ground is characterized by low density, high water content, and sometimes organic soil, which poses problems in soil improvement.
このような地盤上に構造物を造る為には地盤改
良が必要であるが、従来の地盤改良工法には信頼
性の乏しいもの、あるいは工期の長くかかるもの
がある。 In order to build structures on such ground, ground improvement is necessary, but some conventional ground improvement methods are unreliable or take a long time to complete.
本発明は先端上下両方向に向けられた噴射口を
有する円筒状ノズルを回転させながら地中に挿入
し、所定間隔をおいて土壌硬化材料を土中に注入
することにより円筒状補強構造体を地中に形成す
ることを特徴とするものである。 In the present invention, a cylindrical reinforced structure is inserted into the ground while rotating a cylindrical nozzle having an injection port facing both upward and downward directions, and a soil hardening material is injected into the ground at predetermined intervals. It is characterized by being formed inside.
本発明による地盤改良工法は、地盤内に、注入
材料を土のセン断面を補強するように埋めること
と、また注入材料により構造体を造成することに
より地盤支持力を増加させることができる。 The ground improvement method according to the present invention can increase the bearing capacity of the ground by burying the injected material in the ground so as to reinforce the cross section of the soil, and by creating a structure with the injected material.
以下図面を参照して説明する。第１図に示すよ
うにセメントミキサー又はセメントと土壌内での
硬化を促進するセメント硬化剤を混合するミキサ
ー１より高圧ポンプ２によりセメントモルタルを
高圧でノズル３に送る。ノズル３は円筒状で、適
当な本数、図示の実施例では２本がフレーム４に
回転可能に支持され、各ノズルの先端に第２図に
示すように錐兼噴射体５が形成され、第１噴射口
６及び第２噴射口７が夫々上下方向へ45度傾斜し
て向けられて設けられている。各ノズルは上端に
設けられたモータ８により回転され、フレーム４
を図示しない機構により下降させることにより、
ノズルを地中へ挿入して行く。その挿入工程中に
ほぼ一定間隔（例えば1m）でモルタルを噴出さ
せる。 This will be explained below with reference to the drawings. As shown in FIG. 1, cement mortar is sent under high pressure to a nozzle 3 by a high-pressure pump 2 from a cement mixer or a mixer 1 that mixes cement and a cement hardening agent that promotes hardening in soil. The nozzles 3 are cylindrical, and an appropriate number, two in the illustrated embodiment, are rotatably supported on a frame 4. At the tip of each nozzle, a cone-cum-injection body 5 is formed as shown in FIG. The first injection port 6 and the second injection port 7 are provided to be inclined at 45 degrees in the vertical direction, respectively. Each nozzle is rotated by a motor 8 provided at the upper end of the frame 4.
By lowering it by a mechanism not shown,
Insert the nozzle into the ground. During the insertion process, mortar is ejected at approximately constant intervals (for example 1 m).
第３図はモルタルの噴出状態及びそのモルタル
により形成された補強構造体を示す。モルタルは
一定間隔で噴出するので、上下に向つた円錐形椀
形部１０，１１が地中に形成され、両椀形部が交
点１２で交叉して互いに結合され、多数の球体を
連接し内部に補強部材を有する円筒状補強構造体
１３が２個形成され、両構造体も互いに結合され
る。このような構造体を多数地中に形成すること
により軟弱地盤を改良することができる。 FIG. 3 shows the ejected state of the mortar and the reinforcing structure formed by the mortar. Since the mortar is ejected at regular intervals, upwardly facing conical bowl-shaped parts 10 and 11 are formed in the ground, and both bowl-shaped parts intersect at the intersection 12 and are connected to each other, connecting a large number of spheres and forming an internal structure. Two cylindrical reinforcing structures 13 having reinforcing members are formed in the cylindrical structure, and both structures are also connected to each other. Soft ground can be improved by forming a large number of such structures underground.
実施例 ノズル径 1.8mm 吐出圧力 250〜350Kg／cm2 高圧ポンプの吐出量 70／mmExample Nozzle diameter 1.8mm Discharge pressure 250-350Kg/cm 2 Discharge amount of high pressure pump 70/mm
第１図は本発明に使用される装置の一例を示す
概略図、第２図はノズル先端の断面図、第３図は
本発明により形成された補強構造体を示す図であ
る。
１……ミキサー、２……高圧ポンプ、３……ノ
ズル、４……フレーム、５……錐兼噴射体、６…
…第１噴射口、７……第２噴射口、８……モー
タ、１０，１１……円錐形椀形部、１２……交
点、１３……円筒状補強構造体。
FIG. 1 is a schematic diagram showing an example of a device used in the present invention, FIG. 2 is a sectional view of a nozzle tip, and FIG. 3 is a diagram showing a reinforcing structure formed according to the present invention. 1... Mixer, 2... High pressure pump, 3... Nozzle, 4... Frame, 5... Cone and injection body, 6...
...First injection port, 7...Second injection port, 8...Motor, 10, 11...Conical bowl-shaped portion, 12...Intersection, 13...Cylindrical reinforcing structure.
Claims (1)
円筒状ノズルを回転させながら地中に挿入し、所
定間隔をおいて土壌硬化材料を土中に注入するこ
とにより円筒状補強構造体を地中に形成すること
を特徴とする軟弱地盤改良工法。1. A cylindrical reinforcing structure is inserted underground by rotating a cylindrical nozzle with an injection port facing both upward and downward directions, and injecting soil hardening material into the soil at predetermined intervals. A soft ground improvement method characterized by the formation of soft ground.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7029485A JPS61229014A (en) | 1985-04-03 | 1985-04-03 | Method of improving soft ground |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7029485A JPS61229014A (en) | 1985-04-03 | 1985-04-03 | Method of improving soft ground |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61229014A JPS61229014A (en) | 1986-10-13 |
| JPH0452805B2 true JPH0452805B2 (en) | 1992-08-24 |
Family
ID=13427300
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7029485A Granted JPS61229014A (en) | 1985-04-03 | 1985-04-03 | Method of improving soft ground |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61229014A (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07892B2 (en) * | 1988-03-14 | 1995-01-11 | 株式会社エヌ、アイ、ティ | Ground improvement method by ultra-high pressure mixed hardening agent jet and its equipment |
| FR2689534A1 (en) * | 1992-04-06 | 1993-10-08 | Sif Entreprise Bachy | Method of producing underground waterproofing screens, screens thus produced, and jet device for implementing this method. |
| JP2540266B2 (en) * | 1992-06-02 | 1996-10-02 | 常盤建設株式会社 | Sludge discharge injection method and injection device |
| JP5078336B2 (en) * | 2006-12-12 | 2012-11-21 | ケミカルグラウト株式会社 | Liquefaction prevention method |
| JP5782601B2 (en) * | 2013-05-20 | 2015-09-24 | 松本 浩子 | Improved body construction method |
-
1985
- 1985-04-03 JP JP7029485A patent/JPS61229014A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61229014A (en) | 1986-10-13 |
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