JP2930939B1 - Construction method of ground hardened layer by polymerization jet - Google Patents
Construction method of ground hardened layer by polymerization jetInfo
- Publication number
- JP2930939B1 JP2930939B1 JP19577098A JP19577098A JP2930939B1 JP 2930939 B1 JP2930939 B1 JP 2930939B1 JP 19577098 A JP19577098 A JP 19577098A JP 19577098 A JP19577098 A JP 19577098A JP 2930939 B1 JP2930939 B1 JP 2930939B1
- Authority
- JP
- Japan
- Prior art keywords
- jet
- nozzle
- polymerization
- injection
- hardening material
- 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
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- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
【要約】
【課題】 地盤の覆工支保や強化支保、或いは止水を目
的とする硬化材層造成のための地盤硬化材注入は、エア
リフト効果や地内圧の関係からスライム等、大量の産業
廃棄物の排出を伴うという問題があり、課題を残してい
る。
【解決手段】 注入材料として二液性の瞬結性硬化材を
用い、基本として三重同心円形態による重合噴射ノズル
の核ノズル21から高圧による硬化材Ａ液噴流ａ、囲周ノ
ズル22から核ノズル21からの硬化材Ａ液噴流より低圧の
硬化材Ｂ液噴流ｂ、外側囲周ノズル23から囲周ノズル22
からの硬化材Ｂ液噴流より低圧の硬化促進剤噴流ｃを噴
射することにより、硬化材噴流をキャビテーション噴流
に構成して地盤硬化材の注入を行うようにし、必要に応
じてパッカー噴流、事前改良工程を用いるようにした。[PROBLEMS] To inject a ground hardening material for lining or strengthening the ground, or for forming a hardened material layer for the purpose of stopping water, a large amount of industrial waste such as slime due to an air lift effect and ground pressure. There is a problem that it involves the discharge of goods, leaving a problem. SOLUTION: A two-component flash-setting hardening material is used as an injection material, and a hardening material A liquid jet a by high pressure from a core nozzle 21 of a polymerization injection nozzle having a basically triple concentric shape, and a core nozzle 21 from a surrounding nozzle 22 are basically used. From the outside surrounding nozzle 23 to the surrounding nozzle 22
By injecting the hardening material jet into the cavitation jet by injecting the hardening accelerator jet c at a lower pressure than the hardening material B liquid jet from A process was used.
Description
【０００１】[0001]
【発明の属する技術分野】本発明はトンネル等地中坑道
の覆工支保や構築基礎地盤の強化支保、或いは止水を目
的として掘削地盤の周囲等に噴射圧に差を設けた重合キ
ャビテーション噴流として瞬結性地盤硬化材を注入する
ことにより、産業廃棄物となるスライムの排出なしに地
盤硬化層を造成することを目的とした重合噴流による地
盤硬化層造成工法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cavitation jet having a difference in injection pressure around an excavation ground or the like for the purpose of supporting lining of an underground tunnel such as a tunnel, strengthening and supporting a foundation foundation, or water stoppage. The present invention relates to a method for forming a ground hardened layer by a polymerization jet for the purpose of forming a ground hardened layer without discharging slime that is an industrial waste by injecting a flash hardening material.
【０００２】[0002]
【発明が解決しようとする課題】従来、地盤の覆工支保
や強化支保、或いは止水を目的とする硬化材層造成のた
めの地盤硬化材注入は、硬化材噴流の到達距離を少しで
も延長して大径の硬化材層を造成することを理想とし、
エアー巻き噴流など様々な工夫が凝らされてきたが、い
ずれも硬化材噴射の噴射圧自体を高圧化し付帯構成によ
って噴射圧の低下を防止することに中心が置かれてきた
た。Conventionally, the injection of a ground hardening material to support the lining or reinforcement of the ground or to form a hardening material layer for the purpose of stopping water extends the reaching distance of the hardening material jet as much as possible. Ideally to create a large diameter hardened material layer,
Various measures such as air jets have been devised, but in each case, the emphasis has been placed on increasing the injection pressure itself of the hardening material injection and preventing the injection pressure from being reduced by the accompanying configuration.
【０００３】しかしながら、硬化材噴射の噴射圧自体を
高圧化することには限界があり、また、エアーを使用す
る場合はエアーリフト効果により、エアーを使用しない
場合でも瞬結効果が充分に期待できない場合には内圧調
整のために産業廃棄物となるスライムが大量に排出され
るという問題が付きまとっている。[0003] However, there is a limit to increasing the injection pressure itself of the hardening material injection, and when air is used, the instantaneous setting effect cannot be sufficiently expected even when air is not used due to the air lift effect. In such a case, there is a problem that a large amount of slime that is industrial waste is discharged due to internal pressure adjustment.
【０００４】[0004]
【課題を解決するための手段】本発明は、上記の課題に
対応してこれを解決するため、先端部側壁に設定する重
合ノズルを三重同心円構造に設定し、核ノズルから高圧
による硬化材Ａ液噴流、中間囲周ノズルから核ノズルか
らの硬化材Ａ液噴流より低圧の硬化材Ｂ液噴流、更に最
外側囲周ノズルから中間囲周ノズルからの硬化材Ｂ液噴
流より低圧の硬化促進剤噴流を噴射することにより瞬結
性硬化材を重合キャビテーション噴流として噴射注入す
ることによって発生するキャビテーション現象を地盤硬
化材注入における噴流の地盤破砕力と瞬結力増進に利用
するようにしたものである。According to the present invention, in order to solve the above-mentioned problems, a polymerization nozzle set on a side wall of a tip portion is set to have a triple concentric structure, and a hardening material A by a high pressure is applied from a core nozzle. A liquid jet, a hardening material B liquid jet having a lower pressure than the hardening material A jet from the intermediate surrounding nozzle from the core nozzle, and a hardening accelerator having a lower pressure than a hardening material B liquid jet from the outermost circumferential nozzle to the middle surrounding nozzle. The cavitation phenomenon generated by injecting the instantaneous hardening material as a polymerization cavitation jet by injecting a jet is used to enhance the ground crushing force and instantaneous setting force of the jet in the injection of ground hardening material. .
【０００５】すなわち、三重同心円構造に設定した重合
噴射ノズルの核ノズルから高圧による硬化材噴流、囲周
ノズルから核ノズルからの硬化材噴流より低圧の硬化材
噴流、更に最外側囲周ノズルから中間囲周ノズルからの
硬化材Ｂ液噴流より低圧の硬化促進剤噴流を噴射するこ
とにより、高圧噴流と低圧噴流の境界の相対速度差によ
り境界付近に渦が発生し、渦中心には低圧領域が生じて
ここにキャビティ（空洞）が多数生ずる。[0005] That is, a hardening material jet at a high pressure from the core nozzle of the polymerization injection nozzle set in a triple concentric structure, a hardening material jet at a lower pressure than the hardening material jet from the surrounding nozzle to the middle nozzle from the outermost surrounding nozzle. By injecting a hardening accelerator jet at a lower pressure than the hardener B liquid jet from the surrounding nozzle, a vortex is generated near the boundary due to the relative speed difference between the high pressure jet and the low pressure jet, and a low pressure region is formed at the center of the vortex And many cavities occur here.
【０００６】キャビティは対象地盤と噴流の接触面まで
成長を続け対象地盤と噴流の接触面付近で消滅するが、
消滅の際に発生するショックウエーブとジェット流によ
り対象地盤に対する噴流作用面積が拡張され、地盤破砕
力と噴流推進力が発生するものである。The cavity continues to grow to the contact surface between the target ground and the jet and disappears near the contact surface between the target ground and the jet.
The jet wave acting on the target ground is expanded by the shock wave and the jet flow generated at the time of disappearance, and the ground crushing force and the jet propulsion force are generated.
【０００７】キャビテーション噴流は、この地盤破砕力
と噴流推進力を発生する面積が通常のジェットに比べ数
倍から数十倍広いので、地盤破砕力と噴流推進力も極め
て強力なものとなる一方、ショックウエーブによって三
重構造の噴流硬化材ＡＢＣの接触混合力が高められ、破
砕力の消失と同時に瞬結効果を発揮してスライム発生の
余地を残さない。The cavitation jet has an area for generating the ground crushing force and the jet propulsion force several to several tens times larger than that of a normal jet, so that the ground crushing force and the jet propulsion force are extremely strong, while the shock wave As a result, the contact mixing force of the triple structure jet hardening material ABC is enhanced, and the instantaneous setting effect is exhibited simultaneously with the disappearance of the crushing force, leaving no room for slime generation.
【０００８】本発明は、このキャビテーション噴流を通
常の硬化材噴射、瞬結性硬化材のＡ液とＢ液の混合噴
射、更に最近開発された硬化促進剤の添加噴射に利用
し、更には先行改良噴射、パッキング噴流噴射に適用す
るようにしたものである。In the present invention, the cavitation jet is used for normal hardening material injection, mixed injection of the liquid A and liquid B of the instantaneous hardening material, and addition injection of a recently developed hardening accelerator. This is applied to improved jetting and packing jet jetting.
【０００９】[0009]
【発明の実施の形態】以下図面に従って本発明の実施の
形態を説明する。１は注入ロッドでその１流路11、その
２流路12、その３流路13を備え、各流路はそれぞれ核ノ
ズル21、囲周ノズル22、最外側囲周ノズル23に連通して
開口し、ノズル21、22、23は重合して重合噴射ノズルを
構成する。Embodiments of the present invention will be described below with reference to the drawings. Reference numeral 1 denotes an injection rod having a first flow path 11, a second flow path 12, and a third flow path 13. Each flow path is opened to communicate with a nuclear nozzle 21, a surrounding nozzle 22, and an outermost surrounding nozzle 23, respectively. The nozzles 21, 22, and 23 are superposed to form a superposition spray nozzle.
【００１０】その１流路11とその２流路12、その３流路
13に、それぞれ硬化材等を圧送する圧送ポンプは送圧力
に所定の較差が設けられ、核ノズル21への圧送ポンプは
超高圧、囲周ノズル22への圧送ポンプは高圧、最外側囲
周ノズル23への圧送ポンプは低圧となっており、噴射時
に重合して相互にキャビテーション噴流を構成するよう
になっている。The first flow path 11, the second flow path 12, and the three flow paths
13, a pressure pump for pressure-feeding the hardening material etc. is provided with a predetermined range in the pressure, a pressure pump for the core nozzle 21 is super high pressure, a pressure pump for the peripheral nozzle 22 is high pressure, and an outermost peripheral nozzle. The pressure pump to the pump 23 has a low pressure, and is superimposed at the time of injection to form a cavitation jet mutually.
【００１１】注入ロッド１の後端はスイベル３と圧送ポ
ンプを介して材料供給部に連絡するホース31、32、33に
連結すると共に、基台４上に装置された注入ロッド作動
機構５とロッド転向機構６に支持される。The rear end of the injection rod 1 is connected to hoses 31, 32, and 33 connected to a material supply unit via a swivel 3 and a pressure pump, and is connected to an injection rod operating mechanism 5 mounted on a base 4 and a rod. It is supported by the turning mechanism 6.
【００１２】先ず、ロッド転向機構６によって挿入対象
地盤に対する注入ロッド１の角度を垂直方向、水平方
向、仰向方向に転向させると共に、注入ロッド作動機構
５が注入ロッド１を対象地盤Ｇに挿入させるため注入ロ
ッド１に対して前進、後退、回転等の作動を与える。First, the angle of the injection rod 1 with respect to the ground to be inserted is turned in the vertical, horizontal, and elevation directions by the rod turning mechanism 6, and the injection rod operating mechanism 5 causes the injection rod 1 to be inserted into the target ground G. Therefore, the injection rod 1 is given operations such as forward, backward, and rotation.
【００１３】このように装置された注入ロッド１を対象
地盤Ｇに向けて推進挿入し、所定の深度に達したところ
で、その１流路11に超高圧のＡ液硬化材噴流ａ、その２
流路12に高圧のＢ液硬化材噴流ｂ、その３流路13に低圧
の硬化促進剤噴流ｃを圧送して重合噴射ノズル21、22、
23から噴射しつつ、注入ロッド１を回転させながら抜去
方向に後退させれば、硬化材噴流は瞬結性の重合キャビ
テーション噴流として周辺地盤を穿孔切削し土粒子を破
砕して、対象地盤Ｇに注入ロッド１の駆動軌跡に沿って
円筒状に硬化材注入層Ｘを造成する。The injection rod 1 constructed as described above is propulsively inserted toward the target ground G, and when it reaches a predetermined depth, an ultra-high pressure liquid-liquid hardening material jet a, 2
A high-pressure B liquid hardening material jet b is supplied to the flow path 12, and a low-pressure hardening accelerator jet c is supplied to the three flow paths 13 by the polymerization injection nozzles 21 and 22.
When the injection rod 1 is rotated and retracted in the withdrawal direction while rotating from the injection ground 23, the hardening material jet is pierced and cut into the surrounding ground as a flashing polymerization cavitation jet to break the soil particles, and the target ground G A hardening material injection layer X is formed in a cylindrical shape along the driving trajectory of the injection rod 1.
【００１４】更に、パッキング噴流Ｙを用いる場合に
は、注入ロッドにその４流路14、その５流路15を設け、
各流路が重合噴射ノズル21、22、23から所定の間隔を置
いた位置に開口する重合噴射ノズルの核ノズル24、囲周
ノズル25に連通するように構成し、核ノズル24から清水
或いは粘性水もしくは高分子ポリマー溶液等、パッキン
グ噴流を構成する流体を高圧で、囲周ノズル25から同じ
く清水或いは粘性水もしくは高分子ポリマー溶液等、パ
ッキング噴流を構成する流体を核ノズル24より低圧で噴
射し、重合するキャビテーション噴流として噴射する。Further, when the packing jet Y is used, the injection rod is provided with four flow paths 14 and five flow paths 15,
Each flow path is configured to communicate with the core nozzle 24 of the polymerization injection nozzle, which is open at a predetermined distance from the polymerization injection nozzles 21, 22, and 23, and the surrounding nozzle 25. A fluid constituting a packing jet, such as water or a polymer solution, is jetted at a high pressure from the surrounding nozzle 25, and a fluid constituting the packing jet, such as fresh water, viscous water, or a polymer solution, is jetted from the core nozzle 24 at a lower pressure. Injects as a cavitation jet to polymerize.
【００１５】重合噴射ノズル24、25は、重合噴射ノズル
21、22、23の上部位置に開口しているので、重合噴射ノ
ズル21、22、23からの硬化材噴射によって発生する地内
圧の上昇をパッキング噴流Ｙによって抑制し、噴射方向
に誘導して硬化材噴流の到達距離を伸長させる。The polymerization spray nozzles 24 and 25 are polymerization spray nozzles.
Opening at the upper positions of 21, 22, and 23, the rise in the ground pressure generated by the injection of the hardening material from the polymerization injection nozzles 21, 22, and 23 is suppressed by the packing jet Y, and the injection is cured in the injection direction. Extend the reach of the material jet.
【００１６】このように重合噴射ノズル24、25からのパ
ッキング噴流による噴流バリアと加速力によって高圧噴
射の地内圧と余剰スライムは噴射方向に引き込み誘導さ
れて、適度な注入環境を保つので噴射硬化材の到達距離
を伸長すると共に、到達距離の伸長が注入域の混入容量
を増大させる。As described above, the ground pressure and the excess slime of the high-pressure injection are drawn in the injection direction by the jet barrier and the accelerating force by the packing jets from the polymerization injection nozzles 24 and 25, and a proper injection environment is maintained. The extension of the reach increases the mixing capacity of the injection zone.
【００１７】この混入容量の増大により、従来、スライ
ムの噴出による排泥現象を生じていたものが、排泥が殆
ど無い状態で硬化材の土壌への混入を継続することがで
きるものである。Due to the increase in the mixing capacity, a sludge discharge phenomenon caused by slime ejection has conventionally occurred, but the hardening material can be continuously mixed into the soil with almost no sludge.
【００１８】更に、注入ロッド１を対象地盤Ｇに挿入す
る際に、上部重合噴射ノズルの核ノズル24から高圧によ
る流体噴流、囲周ノズル25から核ノズル24からの硬化材
噴流より低圧の流体噴流を噴射することにより流体をキ
ャビテーション噴流として噴射しながら注入ロッドを回
動させつつ注入ロッドを対象地盤の所定深度まで挿入す
れば、周辺土壌はキャビテーション噴流により穿孔破砕
され、ロッド１が所定深度まで挿入されるまでに周辺土
壌の先行改良部Ｚが造成される。Further, when the injection rod 1 is inserted into the target ground G, a fluid jet of high pressure from the core nozzle 24 of the upper polymerization injection nozzle, and a fluid jet of lower pressure than the hardening material jet from the surrounding nozzle 25 and the core nozzle 24 If the injection rod is inserted to a predetermined depth of the target ground while rotating the injection rod while injecting the fluid as a cavitation jet by injecting, the surrounding soil is punctured and broken by the cavitation jet, and the rod 1 is inserted to the predetermined depth. By this time, the preceding improvement part Z of the surrounding soil is created.
【００１９】なお、上部重合噴射ノズルを設けない場合
には、重合噴射ノズルの核ノズル21から高圧による流体
噴流、囲周ノズル22から核ノズル21からの硬化材噴流よ
り低圧の流体噴流を噴射することにより流体をキャビテ
ーション噴流として噴射しながら注入ロッドを回動させ
つつ注入ロッドを対象地盤の所定深度まで挿入するよう
にする。When the upper polymerization injection nozzle is not provided, a high pressure fluid jet is injected from the core nozzle 21 of the polymerization injection nozzle, and a lower pressure fluid jet is injected from the surrounding nozzle 22 than the hardening material jet from the core nozzle 21. Thus, the injection rod is inserted to a predetermined depth of the target ground while rotating the injection rod while ejecting the fluid as a cavitation jet.
【００２０】次いで、前記した硬化材のキャビテーショ
ン噴流により地盤注入を行えば、対象地盤は既に事前改
良されているので、キャビテーション噴流の効果を更に
高めることができる。Next, if the ground is injected by the cavitation jet of the hardened material, the effect of the cavitation jet can be further enhanced because the target ground has already been improved in advance.
【００２１】このように造成される注入層Ｘは、必要に
応じてこれに隣接するX1の部分に同様の注入層を造成
し、次々に隣接させて所定形状に並列することにより、
所定の地盤硬化層を造成していくものである。[0021] injection layer X to be Construction in this manner is to construct a similar injection layer X 1 portion adjacent thereto as required, by parallel into a predetermined shape by adjacent successively,
A predetermined ground hardened layer is formed.
【００２２】[0022]
【図１】本発明の実施例による施工状況を示す全体側面
図FIG. 1 is an overall side view showing a construction state according to an embodiment of the present invention.
【図２】本発明の他の実施例による先行改良部を造成
し、パッキング噴流を用いての施工状況を示す全体側面
図FIG. 2 is an overall side view showing a state of construction using a packing jet when a preceding improvement part according to another embodiment of the present invention is created.
【図３】本発明の実施例による注入ロッド先端部の一部
を切欠して要部構造と噴射状況を示す拡大側面図FIG. 3 is an enlarged side view showing a main part structure and an injection state by cutting out a part of an injection rod tip according to an embodiment of the present invention.
【図４】本発明の他の実施例による二段重合噴射ノズル
を設けた注入ロッド先端部の一部を切欠して要部構造を
示す拡大側面図FIG. 4 is an enlarged side view showing a main part structure in which a part of a tip end of an injection rod provided with a two-stage polymerization injection nozzle according to another embodiment of the present invention is cut away.
【図５】本発明の他の実施例による二段重合噴射ノズル
を設けた注入ロッドのノズル部の拡大正面図FIG. 5 is an enlarged front view of a nozzle portion of an injection rod provided with a two-stage polymerization injection nozzle according to another embodiment of the present invention.
１ 注入ロッド 11 その１流路 12 その２流路 13 その３流路 14 その４流路 15 その５流路 ２ 重合噴射ノズル 2A 上部重合噴射ノズル 21 硬化材超高圧噴流噴射ノズル 22 硬化材高圧噴流噴射ノズル 23 硬化促進剤低圧噴流噴射ノズル 24 流体高圧噴流噴射ノズル 25 流体低圧噴流噴射ノズル ３ スイベル 31、32、33、34、35 硬化材等圧送ホース ４ 基台 ５ 注入ロッド作動機構 ６ 注入ロッド転向機構 Ｇ 対象地盤 Ｘ 硬化材注入層 X1 硬化材注入層造成予定地盤 ａ 硬化材超高圧噴流 ｂ 硬化材高圧噴流 ｃ 硬化促進剤低圧噴流 Ｙ パッキング噴流によるバリア部 Ｚ 先行改良部DESCRIPTION OF SYMBOLS 1 Injection rod 11 1st flow path 12 2nd flow path 13 3rd flow path 14 4th flow path 15 5th flow path 2 Polymerization injection nozzle 2A Upper polymerization injection nozzle 21 Ultra high pressure jet of hardening material 22 High pressure jet of hardening material Injection nozzle 23 Hardening accelerator low-pressure jet injection nozzle 24 Fluid high-pressure jet injection nozzle 25 Fluid low-pressure jet injection nozzle 3 Swivel 31, 32, 33, 34, 35 Hardening material pressure feeding hose 4 Base 5 Injection rod operation mechanism 6 Injection rod turning Mechanism G Target ground X Hardened material injection layer X 1 Hardened material injection layer planned ground a Hardened material ultra-high pressure jet b Hardened material high pressure jet c Hardening accelerator low pressure jet Y Barrier part by packing jet Z Advance improvement part
Claims (3)
ノズルを設けた注入ロッドを対象地盤の所定深度まで挿
入し、重合噴射ノズルの核ノズルから高圧による硬化材
Ａ液噴流、中間囲周ノズルから核ノズルからの硬化材Ａ
液噴流より低圧の硬化材Ｂ液噴流、更に最外側囲周ノズ
ルから中間囲周ノズルからの硬化材Ｂ液噴流より低圧の
硬化促進剤噴流を噴射することにより瞬結性硬化材を重
合キャビテーション噴流として噴射しながら注入ロッド
を回動させつつ後退させることにより、対象地盤中に瞬
結性硬化材を注入することを特徴とする重合噴流による
地盤硬化層造成工法An injection rod provided with a polymerization injection nozzle for triple polymerization is inserted to a predetermined depth of a target ground on a side wall of a distal end portion. Hardening material A from nozzle to core nozzle
A cavitation jet of polymerization hardening material by jetting a hardening material B jet at a lower pressure than the liquid jet and a hardening accelerator jet at a lower pressure than the jetting of the hardening material B from the outermost peripheral nozzle to the intermediate peripheral nozzle. A method for forming a ground hardened layer using a polymerized jet, characterized by injecting a quick-setting hardening material into the target ground by rotating the injection rod while retracting while injecting.
所定間隔を置いて更に二重に重合する重合噴射ノズルを
設け、三重合噴射ノズルからの瞬結性硬化材の重合キャ
ビテーション噴流噴射と共に、上部重合噴射ノズルの核
ノズルから高圧による流体噴流、囲周ノズルから核ノズ
ルからの硬化材噴流より低圧の流体噴流を噴射すること
により流体をキャビテーション噴流として噴射しながら
注入ロッドを回動させつつ後退させることにより、対象
地盤中に硬化材を注入することを特徴とする請求項１記
載の重合噴流による地盤硬化層造成工法2. A polymerization spray nozzle for double polymerization is further provided at a predetermined interval above the polymerization spray nozzle for triple polymerization, and a polymerization cavitation jet spray of the instantaneous curing material from the triple polymerization spray nozzle is provided. By injecting a fluid jet at a high pressure from the core nozzle of the upper polymerization injection nozzle and a fluid jet at a lower pressure than the hardening material jet from the surrounding nozzle from the surrounding nozzle, the injection rod is rotated and retracted while ejecting the fluid as a cavitation jet. 2. A method for forming a ground hardened layer by a polymerization jet according to claim 1, wherein the hardened material is injected into the target ground by causing the hardened material to be injected.
による流体噴流、囲周ノズルから核ノズルからの流体噴
流より低圧の流体噴流を噴射することにより流体をキャ
ビテーション噴流として噴射しながら注入ロッドを回動
させつつ注入ロッドを対象地盤の所定深度まで挿入し
て、注入ロッド挿入時に対象地盤を事前改良して硬化材
注入を行うようにした請求項１又は請求項２記載の重合
噴流による地盤硬化層造成工法3. The injection rod is rotated while ejecting the fluid as a cavitation jet by ejecting a fluid jet at a high pressure from the core nozzle of the upper polymerization injection nozzle and a fluid jet at a lower pressure than the fluid jet from the core nozzle from the surrounding nozzle. 3. The ground hardened layer by polymerization jet according to claim 1 or 2, wherein the injection rod is inserted to a predetermined depth of the target ground while being moved, and the target ground is preliminarily improved when the injection rod is inserted to inject the hardening material. Construction method
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19577098A JP2930939B1 (en) | 1998-07-10 | 1998-07-10 | Construction method of ground hardened layer by polymerization jet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19577098A JP2930939B1 (en) | 1998-07-10 | 1998-07-10 | Construction method of ground hardened layer by polymerization jet |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2930939B1 true JP2930939B1 (en) | 1999-08-09 |
| JP2000027173A JP2000027173A (en) | 2000-01-25 |
Family
ID=16346681
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19577098A Expired - Fee Related JP2930939B1 (en) | 1998-07-10 | 1998-07-10 | Construction method of ground hardened layer by polymerization jet |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2930939B1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007056477A (en) * | 2005-08-23 | 2007-03-08 | Toko Corp | High-pressure jetting type grouting method |
| US7874766B2 (en) | 2008-07-10 | 2011-01-25 | Daiei Sangyo Co., Ltd. | Jet-mixing method and jet-mixing apparatus |
-
1998
- 1998-07-10 JP JP19577098A patent/JP2930939B1/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JP2000027173A (en) | 2000-01-25 |
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