JPH0730552B2 - Control method of finished pile diameter in consolidation pile construction by jet method. - Google Patents
Control method of finished pile diameter in consolidation pile construction by jet method.Info
- Publication number
- JPH0730552B2 JPH0730552B2 JP4156539A JP15653992A JPH0730552B2 JP H0730552 B2 JPH0730552 B2 JP H0730552B2 JP 4156539 A JP4156539 A JP 4156539A JP 15653992 A JP15653992 A JP 15653992A JP H0730552 B2 JPH0730552 B2 JP H0730552B2
- Authority
- JP
- Japan
- Prior art keywords
- jet
- pile
- finished
- diameter
- ground
- 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 - Fee Related
Links
Landscapes
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
- Piles And Underground Anchors (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、高圧ジェット噴流を地
中に注入して固結杭を造成するに際しての仕上がり杭径
の制御方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for controlling the diameter of a finished pile when a high-pressure jet jet is injected into the ground to form a consolidated pile.
【０００２】[0002]
【従来の技術】高圧ジェット噴流を地中に注入して固結
杭を造成し地盤を改良する工法は公知である。2. Description of the Related Art A method for injecting a high-pressure jet jet into the ground to form a solidified pile and improve the ground is known.
【０００３】かかる工法の代表的なものとして、ジェッ
ト・グラウト工法とケミカル・チャーニング・パイル工
法とがある。Typical examples of such a construction method include a jet grout construction method and a chemical-charging pile construction method.
【０００４】ジェット・グラウト工法は、超高圧噴流と
それを取り囲むエアーとにより地盤を切削し、その空隙
に硬化材を流入充填して固結杭を造成する工法であり、
またケミカル・チャーニング・パイル工法は、硬化材を
地盤中に超高圧で噴射してその破壊力で地盤を切削し、
地盤中に固結杭を造成する工法である。The jet grout method is a method in which a ground is cut by an ultrahigh pressure jet and air surrounding the jet, and a hardening material is introduced and filled in the voids to form a consolidated pile.
In addition, the chemical-charging pile method involves injecting a hardening material into the ground at ultra-high pressure and cutting the ground with its destructive force.
This is a method of constructing solidified piles in the ground.
【０００５】ところで、かかる地盤改良工法において、
高圧ジェット噴流を地中に注入する場合、土質及び土性
（強度、含水比、間隙比）によってジェット噴流の到達
距離が異なるため、従来は過大なパワーによって水ある
いは地盤改良材を注入し、固結杭すなわち造成パイルの
仕上がり径を大きめに確保することを優先する傾向があ
った。By the way, in such a ground improvement method,
When injecting a high-pressure jet jet into the ground, the reaching distance of the jet jet differs depending on the soil quality and soil properties (strength, water content ratio, void ratio), so conventionally water or ground improvement material was injected with excessive power and solidified. There was a tendency to prioritize securing a large finished diameter of the piles, that is, the constructed piles.
【０００６】[0006]
【発明が解決しようとする課題】前述の過大なパワーに
よって水あるいは硬化材を注入し、造成パイルの仕上が
り径を大きめに確保する従来工法による場合は、材料の
ロスや多量のスライムの流出等の問題点があった。In the case of the conventional method of injecting water or a hardening material by the above-mentioned excessive power to secure a large finished diameter of the forming pile, the material loss and the outflow of a large amount of slime are caused. There was a problem.
【０００７】本発明は、ジェット噴流の到達距離を制御
して造成パイル径を状況に応じて選択できるようにし
て、従来工法における場合の材料のロス等の不都合を解
決すべくなされたものである。The present invention has been made to solve the inconvenience such as material loss in the conventional method by controlling the reaching distance of the jet jet so that the diameter of the forming pile can be selected according to the situation. .
【０００８】[0008]
【課題を解決するための手段】このため本発明によれ
ば、高圧ジェット噴流により地中に固結杭を造成するに
際し、水または硬化材を噴射するノズルとして、地中に
挿入する管にその長手方向に適宜の間隔を隔てて設けた
少なくとも２個のノズルを用い、それ等のノズルは噴射
角度調整可能なものであり、到達距離に応じてノズルの
噴射角度を調整して交差噴流を成立させ、もって仕上が
り杭径の制御を行うようにする。For this reason, according to the present invention, when a solidified pile is formed in the ground by a high-pressure jet jet, a pipe to be inserted into the ground serves as a nozzle for injecting water or a hardening material. At least two nozzles provided at appropriate intervals in the longitudinal direction are used, and these nozzles are capable of adjusting the injection angle, and the injection angle of the nozzles is adjusted according to the reach distance to establish a cross jet. Then, control the diameter of the finished pile accordingly.
【０００９】[0009]
【作用】２点以上の噴出口から噴射した流体が互いに出
会ったとき、合成された噴流のエネルギーはその交差角
度によって減少することが知られている。これを応用し
て合成された噴流の到達距離を制御し、所定の仕上り杭
径を得る。It is known that when fluids ejected from two or more jet outlets meet each other, the energy of the combined jet decreases depending on the intersection angle. By applying this, the reaching distance of the synthesized jet flow is controlled to obtain a predetermined finished pile diameter.
【００１０】[0010]
【実施例】以下図面を参照して本発明の実施例を説明す
る。Embodiments of the present invention will be described below with reference to the drawings.
【００１１】図において、１は発電機、２は発電機１に
よって駆動される高圧ポンプ、３は配管、４は配管３に
地中に挿入された管を連結しているスイベルジョイン
ト、５は攪拌処理機、６は高圧ジェット噴流を噴射する
ノズルを設けた管、７ａ、７ｂは管６の下端部でその長
手方向に間隔を隔てて設けた上、下のノズルで、このノ
ズル７ａ、７ｂは噴射角度が調整できるようになってい
る。In the figure, 1 is a generator, 2 is a high-pressure pump driven by the generator 1, 3 is a pipe, 4 is a swivel joint connecting pipes inserted in the ground to the pipe 3, and 5 is a stirrer. A processing machine, 6 is a pipe provided with a nozzle for injecting a high-pressure jet jet, 7a, 7b are upper and lower nozzles provided at the lower end of the pipe 6 at intervals in the longitudinal direction, and these nozzles 7a, 7b are The injection angle can be adjusted.
【００１２】高圧ポンプ２からスイベルジョイント４を
経由して管６の下端部に設けた上部および下部のノズル
７ａ、７ｂから水または硬化材を噴射する。ここでは硬
化材を噴射するものとし、硬化材としてはセメントミル
ク、モルタル、薬剤などが挙げられる。ノズル７ａ、７
ｂは角度調整可能なものであり、交差噴流Ｓが成立する
ように（出会うように）各々のノズル７ａ、７ｂの角度
をセットする。また交差角度αは、到達距離に応じた角
度をあらかじめ定めておきその角度にセットする。Water or a hardening material is jetted from the high pressure pump 2 through the swivel joint 4 from the upper and lower nozzles 7a and 7b provided at the lower end of the pipe 6. Here, it is assumed that a hardening material is injected, and examples of the hardening material include cement milk, mortar, and chemicals. Nozzles 7a, 7
The angle b is adjustable, and the angles of the nozzles 7a and 7b are set so that the cross jet S is established (to meet). As the intersection angle α, an angle corresponding to the reaching distance is set in advance and set to that angle.
【００１３】噴流の噴出タイミングについてはその時の
施工の状況によって決められるもので、管６の貫入時に
噴出するか管６の引抜き時に噴出するかは状況に応じて
いずれもでよい。The jetting timing of the jet flow is determined by the working conditions at that time, and it may be jetted when the pipe 6 penetrates or jetted when the pipe 6 is pulled out.
【００１４】ノズル７ａ、７ｂから硬化材を噴射しなが
ら管６が回転し上下どちらかの方向に処理機５の位置が
移動すると、図に示すように交差噴流Ｓの出会った点Ｔ
を最外縁Ｒとするコラム状の造成パイルＢが地盤Ａ中に
仕上がることになる。場合によっては、管６の先端から
ノズル７ａ、７ｂ（高圧部）よりは低い圧力で硬化材Ｍ
を吐出するようにする。この場合、ポンプを高圧、低圧
の２系統にするか圧送配管で減圧するなどの装置を設け
るとよい。When the pipe 6 rotates while spraying the hardening material from the nozzles 7a and 7b and the position of the processing machine 5 moves in either the upper or lower direction, the point T where the cross jet S meets as shown in the figure.
The column-shaped construction pile B having the outermost edge R is finished in the ground A. Depending on the case, the hardening material M is applied from the tip of the pipe 6 at a pressure lower than that of the nozzles 7a and 7b (high pressure portion).
To be discharged. In this case, it is advisable to provide an apparatus such as a high pressure and low pressure system for the pump or a pressure reducing pipe for reducing the pressure.
【００１５】また、以上に述べた工法は、ノズルから硬
化材を噴射するケミカル・チャーニング・パイル工法に
限ることなく、ノズルから水を噴射して地盤を切削し、
その空隙に硬化材を流入充填するジェット・グラウト工
法にも実施できるものである。Further, the construction method described above is not limited to the chemical-charging pile construction method in which the hardening material is jetted from the nozzle, but water is jetted from the nozzle to cut the ground,
It can also be applied to a jet grout method in which a hardening material is filled in the voids.
【００１６】[0016]
【発明の効果】従来は、噴出流量、ノズルの噴出口断面
積等との固定的関係から杭の仕上がり径を制御する自由
度がなく材料の効率的使用が難しく、またスライム湧出
量の抑制も難しかった。本発明の交差噴流の使用によっ
て、設計に適応する造成パイルの仕上がり径が硬化材の
流量と吐出口断面積の他にノズルの角度によって自由に
選択できる。また、噴流の本数は交差させるために複数
本の噴流が必要であるが、単位深さ当りの噴流が土をき
る回数は噴流の本数分だけ増加し、攪拌効率が大幅に増
大する。EFFECTS OF THE INVENTION Conventionally, since there is no degree of freedom to control the finished diameter of the pile due to a fixed relationship with the jet flow rate, the nozzle cross-sectional area of the nozzle, etc., it is difficult to use the material efficiently, and the slime seepage amount is also suppressed. was difficult. By using the cross jet of the present invention, the finished diameter of the building pile adapted to the design can be freely selected by the angle of the nozzle in addition to the flow rate of the hardening material and the cross-sectional area of the discharge port. Further, a plurality of jets are required to intersect the jets, but the number of jets per unit depth that cuts through the soil is increased by the number of jets, and the stirring efficiency is significantly increased.
【図１】本発明に係るジェット工法による固結杭造成に
おける仕上がり杭径の制御方法を実施する装置を示す
図。FIG. 1 is a view showing an apparatus for carrying out a method for controlling a diameter of a finished pile in forming a consolidated pile by a jet method according to the present invention.
１・・・発電機 ２・・・高圧ポンプ ３・・・配管 ４・・・スイベルジョイント ５・・・攪拌処理機 ６・・・地中に挿入する管 ７ａ、７ｂ・・・ノズル 1 ... Generator 2 ... High-pressure pump 3 ... Piping 4 ... Swivel joint 5 ... Agitation processor 6 ... Pipes inserted into the ground 7a, 7b ... Nozzle
───────────────────────────────────────────────────── フロントページの続き (72)発明者 磯田 知広 千葉県千葉市花見川区朝日ケ丘町3273 に れの木台２−15−102 (72)発明者 三好 朗弘 神奈川県横浜市栄区笠間町1758 (72)発明者 山口 好一郎 茨城県猿島郡総和町上辺見3281 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Tomohiro Isoda 2153-102, Norenokidai, 3273 Asahigaoka-cho, Hanamigawa-ku, Chiba-shi, Chiba (72) Akihiro Miyoshi 1758 Kasama-cho, Sakae-ku, Yokohama-shi, Kanagawa ( 72) Inventor Koichiro Yamaguchi 3281 Kamibemi, Sowa-machi, Sarushima-gun, Ibaraki Prefecture
Claims (1)
造成するに際し、水または硬化改良材を噴射するノズル
として、地中に挿入する管にその長手方向に適宜の間隔
を隔てて設けた少なくとも２個のノズルを用い、それ等
のノズルは噴射角度調整可能なものであり、到達距離に
応じてノズルの噴射角度を調整して交差噴流を成立さ
せ、もって仕上がり杭径の制御を行うことを特徴とする
ジェット工法による固結杭造成における仕上がり杭径の
制御方法。1. When a solidified pile is formed in the ground by a high-pressure jet jet, as a nozzle for injecting water or a hardening-improving material, it is provided in a pipe to be inserted into the ground at appropriate intervals in the longitudinal direction thereof. At least two nozzles are used, and those nozzles are capable of adjusting the injection angle, and the injection angle of the nozzles is adjusted according to the reaching distance to establish a cross jet flow, thereby controlling the diameter of the finished pile. A method for controlling the finished pile diameter in the consolidation pile construction by the jet method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4156539A JPH0730552B2 (en) | 1992-06-16 | 1992-06-16 | Control method of finished pile diameter in consolidation pile construction by jet method. |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4156539A JPH0730552B2 (en) | 1992-06-16 | 1992-06-16 | Control method of finished pile diameter in consolidation pile construction by jet method. |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06257139A JPH06257139A (en) | 1994-09-13 |
| JPH0730552B2 true JPH0730552B2 (en) | 1995-04-05 |
Family
ID=15630009
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4156539A Expired - Fee Related JPH0730552B2 (en) | 1992-06-16 | 1992-06-16 | Control method of finished pile diameter in consolidation pile construction by jet method. |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0730552B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5913027B2 (en) * | 2012-09-20 | 2016-04-27 | ケミカルグラウト株式会社 | Test method and test apparatus for cross-jet injection device |
| JP6391068B2 (en) * | 2014-12-24 | 2018-09-19 | ケミカルグラウト株式会社 | Determination apparatus and determination method |
-
1992
- 1992-06-16 JP JP4156539A patent/JPH0730552B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06257139A (en) | 1994-09-13 |
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