JP3357648B2 - Cavitation jet ground hardened layer formation method and device by differential pressure confluence - Google Patents
Cavitation jet ground hardened layer formation method and device by differential pressure confluenceInfo
- Publication number
- JP3357648B2 JP3357648B2 JP2000112300A JP2000112300A JP3357648B2 JP 3357648 B2 JP3357648 B2 JP 3357648B2 JP 2000112300 A JP2000112300 A JP 2000112300A JP 2000112300 A JP2000112300 A JP 2000112300A JP 3357648 B2 JP3357648 B2 JP 3357648B2
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- pressure
- nozzle
- jet
- square
- injection
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- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Description
【０００１】[0001]
【発明の属する技術分野】本発明は軟弱地盤の改良、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、地盤硬化材を較差圧噴流と
してロッド内で合流させ噴射時の衝撃によりキャビテー
ション噴流として掘削地盤の周囲等に注入して地盤硬化
層を造成する較差圧合流によるキャビテーション噴流地
盤硬化層造成工法とその装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is intended to improve soft ground, to support the lining of underground tunnels such as tunnels, to strengthen the foundation foundation, or to stop water. The present invention relates to a method and apparatus for forming a cavitation jet ground hardened layer by differential pressure confluence in which a cavitation jet is injected into the periphery of an excavated ground by an impact at the time of injection to form a ground hardened layer.
【０００２】[0002]
【発明が解決しようとする課題】従来、軟弱地盤の改
良、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, ground hardening material injection for improvement of soft ground, support of ground lining or reinforcement, or formation of a hardening material layer for the purpose of water stoppage has been achieved by the injection of a hardening material jet. Ideally, the distance should be extended a little to create a large-diameter hardening material layer.Various devices such as air-winding jets have been devised. The focus has been on preventing a drop in injection pressure.
【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、高圧作動による
危険が増大するという問題が付きまとっている。[0003] However, there is a limit in increasing the injection pressure itself of the hardening material injection, and there is a problem that the danger due to the high-pressure operation increases.
【０００４】これに対応して重合する核噴流と囲周噴流
との噴射圧に較差を設け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
砕力と噴流推進力増進に利用することについては、本願
出願人により既に提案（特願平９ー317552号）されてい
る。[0004] The cavitation phenomenon generated by providing a difference in the injection pressure between the core jet and the surrounding jet that polymerize correspondingly is used for enhancing the ground crushing force and the jet propulsion force of the jet in the injection of ground hardening material. Has already been proposed by the present applicant (Japanese Patent Application No. 9-317552).
【０００５】しかしながら、硬化材噴射の噴射圧自体の
高圧化に替えてキャビテーション現象による破砕力を積
極的に利用し、構成として複雑な重合噴射ノズルによら
ずキャビテーション噴流を発生させ、切削水噴射による
硬化材層拡径効果との調和によって噴射圧の高圧化を更
に減少させることが、更なる課題としてある。However, the crushing force due to the cavitation phenomenon is positively used instead of increasing the injection pressure itself of the hardening material injection, and a cavitation jet is generated without using a complicated polymerization injection nozzle as a configuration, and the cutting water injection is performed. It is a further problem to further reduce the increase in the injection pressure in harmony with the effect of expanding the diameter of the hardened material layer.
【０００６】[0006]
【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、その１流路とその２流路
をロッド内において合流させ、合流部の先において両側
に分岐して開口する先端両側ノズル、先端両側ノズルか
ら所定間隔を置いた上部に高圧流体噴射ノズルを設けた
注入ロッドを対象地盤の所定深度まで挿入し、その１流
路に高圧硬化材、その２流路にその１流路より低圧の硬
化材を圧送して合流させ、差圧共振による発生気泡を含
む硬化材噴流を先端両側ノズルから噴射し、噴射衝撃に
よるキャビテーション噴流として噴射すると共に、高圧
流体噴射ノズルから切削噴流を噴射しつつ回動ながら、
後退させることにより、対象地盤中に硬化材を注入する
ように構成したものである。According to the present invention, in order to solve the above-mentioned problems, the first flow path and the two flow paths are merged in a rod, and branched to both sides at the end of the junction. Insert the injection rod, which is provided with a high-pressure fluid injection nozzle at the top of the nozzle at a predetermined interval from the nozzle at both ends and open to the predetermined depth of the target ground, and pressurize the high-pressure hardening material into one flow path. A low-pressure hardening material is pressure-fed from the one flow path and merged, and a hardening material jet including bubbles generated by differential pressure resonance is jetted from nozzles on both ends at the tip, and is jetted as a cavitation jet due to jet impact and a high-pressure fluid jet. While rotating while injecting the cutting jet from the nozzle,
By retreating, the hardening material is injected into the target ground.
【０００７】すなわち、その１流路に高圧硬化材、その
２流路にその１流路より低圧の硬化材を圧送してロッド
内において合流させることにより、重合噴射ノズルとい
う複雑な構成を取らずに高圧噴流と低圧噴流の差圧共振
による気泡を多数発生させることができた。That is, a high-pressure curing material is supplied to one of the flow paths, and a curing material having a lower pressure than the one flow path is supplied to the two flow paths and merged in the rod. Many bubbles could be generated by the differential pressure resonance between the high pressure jet and the low pressure jet.
【０００８】本発明は上記発生気泡を内包する硬化材噴
流を先端両側ノズルから噴射し、周辺土壌との衝突によ
る噴射衝撃により気泡を圧潰するキャビテーション噴流
として噴射するように構成したものであり、ロッド内に
おいて気泡内包噴流が形成され、両側に分岐して開口す
る先端両側ノズルから噴射されることにより、確実な破
砕力の発生と硬化材吐出量の増大を図ることができる。According to the present invention, a hardening material jet containing the generated bubbles is jetted from the nozzles on both ends of the tip, and jetted as a cavitation jet which crushes the bubbles by jetting impact due to collision with surrounding soil. A bubble-enclosed jet is formed inside the nozzle, and is jetted from a nozzle on both ends that branches off and opens on both sides, so that it is possible to generate a reliable crushing force and increase the discharge amount of the hardener.
【０００９】一方、先端両側ノズルから所定間隔を置い
た上部高圧流体噴射ノズルから清水等の高圧流体を噴射
することにより、硬化材噴射域の事前改良とパッキング
効果によって注入効果を更に高めることができる。On the other hand, by injecting a high-pressure fluid such as fresh water from the upper high-pressure fluid ejection nozzle spaced a predetermined distance from the nozzles on both ends of the tip, the injection effect can be further enhanced by advance improvement of the hardened material ejection area and packing effect. .
【００１０】更に、上部高圧流体噴射ノズルを噴射口を
角型に構成した角型重合噴射ノズルに構成し、その角型
核ノズルから高圧切削噴流、角型囲周ノズルから角型核
ノズルからの切削噴流より低圧の切削噴流を噴射するよ
うにすれば、重合噴射ノズルの噴射口が角型に構成され
ることにより、コーナー流は噴射口の角部に衝合して噴
射圧が低減しセンター流との間に較差を生じ、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）が多数生じ、角型核ノズルと角型囲周ノズルそ
れぞれの較差圧噴流効果と重合較差圧効果が、更に重合
して極めて強力なキャビテーション効果を得ることがで
きる。Further, the upper high-pressure fluid injection nozzle is configured as a square polymerization injection nozzle having a square injection port, and the high-pressure cutting jet from the square core nozzle and the high-pressure cutting jet from the square surrounding nozzle to the square core nozzle. By injecting a cutting jet at a lower pressure than the cutting jet, the injection port of the polymerization injection nozzle is formed in a square shape, so that the corner flow abuts the corner of the injection port and the injection pressure is reduced, and the center pressure is reduced. A vortex is generated near the boundary due to the relative velocity difference between the high-pressure jet and the low-pressure jet, and a low-pressure region is generated at the center of the vortex, where a large number of cavities (cavities) are generated. The differential pressure jet effect and the polymerization differential pressure effect of each of the core nozzle and the square surrounding nozzle are further polymerized to obtain an extremely strong cavitation effect.
【００１１】また、注入ロッド先端に削孔水噴出孔を設
けると共に、ロッド側壁に張出させた攪拌翼を設け、先
端両側ノズル上部の高圧流体噴射ノズルを噴射口を角型
に構成した角型噴射ノズルに構成し、攪拌翼先端に開口
させるようにして、物理的攪拌を加えると共に高圧流体
の到達距離を伸長させて硬化材層の拡径とキャビテーシ
ョン効果の拡大を図るようにした。In addition, a drilling water jetting hole is provided at the tip of the injection rod, and a stirring blade protruding from the side wall of the rod is provided. The injection nozzle was configured to be opened at the tip of the stirring blade, so that physical stirring was performed and the reaching distance of the high-pressure fluid was extended to increase the diameter of the hardened material layer and the cavitation effect.
【００１２】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.
【００１３】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。The cavitation jet has an area that generates the ground crushing force and the jet propulsion force several to tens of times wider than that of a normal jet, so that the ground crushing force and the jet propulsion force are extremely strong.
【００１４】本発明は、較差圧合流によるキャビテーシ
ョンと較差噴射圧重合噴流、更に、角型形状規制による
較差噴流の合成による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
には先行改良噴射、パッキング噴流噴射にも適用するよ
うにしたものである。According to the present invention, cavitation due to differential pressure confluence and differential jet pressure polymerization jet, and further, cavitation jet obtained by synthesizing the differential jet according to the regulation of the square shape, are combined with the normal hardening material injection and the liquid A of the instantaneous hardening material. The present invention is also applied to the mixed injection of the liquid B, the preceding improved injection, and the packing jet injection.
【００１５】[0015]
【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、その４流路14を備え、その
１流路11とその２流路12はロッド内において合流し、合
流部21の先において両側に分岐して注入ロッド１の先端
部両側に開口する先端両側ノズル２に連通する。先端両
側ノズル２は角型或いは円型の単孔ノズルとして構成さ
れる。Embodiments of the present invention will be described below with reference to the drawings. Reference numeral 1 denotes an injection rod, which has one flow path 11, two flow paths 12, three flow paths 13, and four flow paths 14, and the one flow path 11 and the two flow paths 12 merge in the rod, At the end of the junction 21, it branches off on both sides and communicates with the nozzles 2 on both ends that open on both sides of the tip of the injection rod 1. The nozzles 2 on both ends are configured as square or circular single-hole nozzles.
【００１６】また、注入ロッド１は先端にコンポジット
硬装された掘削翼41を備え、継手手段42により所定スト
ロークごとに継手されて構成されるようになっている。The injection rod 1 is provided with an excavating wing 41 which is compositely mounted on the tip thereof, and is joined by a joint means 42 at every predetermined stroke.
【００１７】先端両側ノズル２の上部には２メートル程
度の間隔を置いて上部高圧流体噴射ノズル３が設定さ
れ、その３流路13がこれに連通するが、上部高圧流体噴
射ノズル３を噴射口が角型に構成された角型重合噴射ノ
ズルに構成する場合には、その３流路13が角型核ノズル
31、その４流路14が角型囲周ノズル32にそれぞれ連通し
て開口し、ノズル31、32が重合して角型重合噴射ノズル
３を構成する。An upper high-pressure fluid injection nozzle 3 is set above the nozzles 2 on both ends at an interval of about 2 meters, and the three flow paths 13 communicate with the upper high-pressure fluid injection nozzle 3. Is configured as a square polymerization injection nozzle having a square shape, the three flow paths 13 are square nuclear nozzles.
31 and the four flow paths 14 are respectively opened to communicate with the square surrounding nozzle 32, and the nozzles 31 and 32 are superposed to constitute the square superposed spray nozzle 3.
【００１８】角型ノズル噴射口の角型形状は、対象地盤
の状况に対応して三角形、正方形、縦矩形、横矩形等の
隅角を有する形状に形成され、それぞれ、特色のあるキ
ャビテーション噴流を構成するようになっている。The square shape of the square nozzle orifice is formed in a shape having corners such as a triangle, a square, a vertical rectangle, and a horizontal rectangle in accordance with the condition of the target ground. Configuration.
【００１９】他の実施例としてロッド側壁に張出させた
攪拌翼４を設け、先端両側ノズル上部の高圧流体噴射ノ
ズル３を攪拌翼先端に開口させる場合には、高圧流体噴
射ノズル３は角型或いは円型の単孔ノズルとし、その３
流路13がこれに連通し、その４流路14は注入ロッド先端
に設けられる削孔水噴出孔33に連通する。In another embodiment, when a stirring blade 4 protruding from the side wall of the rod is provided, and the high-pressure fluid injection nozzle 3 above the nozzle on both sides at the tip is opened at the tip of the stirring blade, the high-pressure fluid injection nozzle 3 is square. Alternatively, a circular single-hole nozzle is used.
The flow path 13 communicates with this, and the four flow paths 14 communicate with the drilling water jet holes 33 provided at the tip of the injection rod.
【００２０】その１流路11、その２流路12、その３流路
13、その４流路14は、注入ロッド１の後端のスイベル５
と圧送ポンプを介してそれぞれ材料供給部に連絡するホ
ース51に連結し、施工状况に応じて必要とされる材料を
選択的に供給できるようになっている。The first channel 11, the second channel 12, the three channels
13. The four flow paths 14 are provided with a swivel 5 at the rear end of the injection rod 1.
And a hose 51 connected to a material supply unit via a pressure feed pump, so that a required material can be selectively supplied according to a construction situation.
【００２１】その１流路11とその２流路12にそれぞれに
硬化材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、その１流路11への圧送ポンプは高圧、その２流
路12への圧送ポンプは低圧となっており、合流部21にお
いて合流することにより高圧噴流と低圧噴流の差圧共振
による気泡が多数発生し、気泡内包硬化材噴流となって
先端両側ノズル２から噴射される。The pump for pumping the hardening material into each of the first flow path 11 and the second flow path 12 is provided with a predetermined difference in the feeding pressure. The pressure feed pump to the passage 12 is at a low pressure, and when it joins at the junction 21, a number of bubbles are generated due to the differential pressure resonance between the high-pressure jet and the low-pressure jet. It is injected.
【００２２】このように構成された注入ロッド１は、バ
ックホウ型の移動装置６に装置された注入ロッド作動機
構７に支持され、回転、回動、上下動（水平方向への施
工の場合は前進後退）の操作が行なえるようになってい
る。The injection rod 1 configured as described above is supported by an injection rod operating mechanism 7 provided in a backhoe-type moving device 6, and is rotated, rotated, moved up and down (in the case of construction in a horizontal direction, forward. Backward) operation can be performed.
【００２３】造成施工は、１つの実施例として、先ず、
移動装置５によって注入ロッド１を挿入対象地盤に設定
すると共に、その１流路11に200kg/cm2 程度の高圧水、
その２流路12に50kg/cm2程度の低圧水を圧送し、気泡内
包切削水噴流として先端両側ノズル２から噴射し、或い
は、併せてその３流路13に高圧水、その４流路14に低圧
水を圧送し、角型核ノズル31と角型囲周ノズル32によっ
て形状規制重合キャビテーション噴流として噴射しなが
ら、掘削翼41によって対象地盤Ｇを掘削し注入ロッド１
を対象地盤Ｇに向けて推進挿入する。[0023] The construction work is, as one embodiment, first,
The injection rod 1 is set on the ground to be inserted by the moving device 5, and high pressure water of about 200 kg / cm 2 is
The low pressure water of about 50 kg / cm 2 is pumped into the two flow paths 12 and jetted from the nozzles 2 on both sides at the tip as a bubble-containing cutting water jet, or the high pressure water and the four flow paths 14 The low pressure water is pumped to the target ground G by the excavation wing 41 and injected into the injection rod 1 while the low pressure water is jetted by the square core nozzle 31 and the square surrounding nozzle 32 as a shape-controlled polymerization cavitation jet.
Into the target ground G.
【００２４】これによって、周辺土壌は硬化材噴射到達
域より広範囲にわたって切削攪拌され、事前改良域が造
成される。なお、この事前改良域造成は対象地盤の状况
や施工条件に対応して行なうもので、オーバー施工にな
る場合には行なわないことは勿論であり、注入ロッド１
の対象地盤Ｇへの挿入は適宜手段によって行なえば良
い。Thus, the surrounding soil is cut and agitated over a wider area than the hardened material injection reaching area, and a pre-improved area is created. This pre-improvement area development is performed in accordance with the condition of the target ground and construction conditions.
May be inserted into the target ground G by appropriate means.
【００２５】所定の深度に達したところで、その１流路
11、その２流路12への圧送材料を地盤硬化材に切替え、
前記切削水と同様に200kg/cm2 程度の硬化材噴流と50kg
/cm2程度の硬化材噴流の較差圧噴流として合流させ気泡
内包硬化材噴流として先端両側ノズル２から噴射し、併
せてその３流路13に高圧水、その４流路14に低圧水を圧
送し、角型核ノズル31と角型囲周ノズル32によって形状
規制重合キャビテーション噴流として噴射しつつ、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。When a predetermined depth is reached, the one flow path
11, switch the material to be pumped to the two flow paths 12 to the ground hardening material,
Wherein similarly to the cutting water 200 kg / cm 2 about curing material jet and 50kg
/ cm 2 is jetted from the nozzles 2 on both ends as a hardening material jet encapsulating bubbles, and high-pressure water is supplied to the three flow paths 13 and low-pressure water is supplied to the four flow paths 14. When the injection rod 1 is rotated and retracted in the withdrawal direction while being injected as a shape-regulated polymerization cavitation jet by the square core nozzle 31 and the square surrounding nozzle 32, the hardened material jet is formed as a cavitation jet to the surrounding ground. The hardened material injection layer X is formed into a cylindrical shape along the driving locus of the injection rod 1 on the target ground G by drilling and cutting the soil particles.
【００２６】ロッド側壁に張出させたコンポジット硬装
された攪拌翼４を設け、先端両側ノズル上部の高圧流体
噴射ノズル３を攪拌翼先端に開口させる他の実施例の場
合には、その４流路14に削孔水を圧送して注入ロッド先
端に設けられた削孔水噴出孔33から噴出させ、その３流
路13に削孔水を圧送して攪拌翼先端に開口する高圧流体
噴射ノズル３から噴射しながら、掘削翼41と攪拌翼４に
よって対象地盤Ｇを掘削し注入ロッド１を対象地盤Ｇに
向けて推進挿入する。In the case of another embodiment in which a stirring wing 4 mounted on the rod and protruding from the side wall of the composite is provided, and the high-pressure fluid jet nozzle 3 above the nozzles on both sides at the tip is opened at the tip of the stirring wing. High-pressure fluid injection nozzle that pressurizes drilling water into the passage 14 and jets it out from the drilling water jetting hole 33 provided at the tip of the injection rod. The target ground G is excavated by the excavating wings 41 and the stirring wings 4 while being injected from 3, and the injection rod 1 is propelled and inserted toward the target ground G.
【００２７】所定の深度に達したところで、その３流路
13に高圧水を圧送し、攪拌翼先端に開口する噴射口を角
型に構成した角型高圧流体噴射ノズル３から形状規制に
よるキャビテーション噴流として噴射し、その１流路11
に高圧硬化材、その２流路12に低圧硬化材を圧送し、合
流部21において較差圧噴流として合流させ気泡内包硬化
材噴流として先端両側ノズル２からキャビテーション噴
流として噴射しつつ、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。When a predetermined depth is reached, the three flow paths
High-pressure water is pumped to the nozzle 13 and the jet opening opening at the tip of the stirring blade is jetted from a square high-pressure fluid jet nozzle 3 having a square shape as a cavitation jet by shape regulation.
The high pressure hardening material and the low pressure hardening material are pressure-fed to the two flow paths 12 thereof, and merged as a differential pressure jet at the merging section 21 to eject the injection rod 1 as a cavitation jet from the nozzles 2 at both ends as a bubble-encapsulated hardener jet. If the hardening material jet is retreated in the withdrawal direction while rotating, the hardening material jet is cavitational jet to pierce and cut the surrounding ground to crush the soil particles, and to inject the hardening material into the target ground G in a cylindrical shape along the driving trajectory of the injection rod 1. Layer X is formed.
【００２８】瞬結性硬化材を用いる場合には、上記の各
場合に対応した挿入工程により注入ロッド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Ａ液を高圧の硬化材噴流として、その２
流路12にＢ液をそれよりも低圧の硬化材噴流として圧送
して合流部21において較差圧噴流として合流させ、Ａ液
Ｂ液混合気泡内包硬化材噴流として先端両側ノズル２か
らキャビテーション噴流として噴射しつつ、上記の各場
合に対応した高圧流体噴射ノズル３からのキャビテーシ
ョン噴流噴射を行い、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、Ａ液とＢ液は混合キャビテーシ
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２液性硬化材の混合注入層Ｘを造成する。In the case where the instantaneous hardening material is used, the injection rod 1 is propelled and inserted toward the target ground G by an insertion process corresponding to each of the above cases.
The liquid A is supplied to the channel 11 as a high-pressure hardening material jet, and
The liquid B is pumped into the flow path 12 as a hardening material jet having a lower pressure than the liquid B and merges as a differential pressure jet at the junction 21, and is jetted as a cavitation jet from the nozzles 2 on both ends as a hardening material jet including the liquid A and the liquid B mixed bubbles. While performing the cavitation jet injection from the high-pressure fluid injection nozzle 3 corresponding to each of the above cases and retreating in the withdrawal direction while rotating the injection rod 1, the liquid A and the liquid B become mixed cavitation jets in the surrounding ground. To crush the soil particles to form a mixed injection layer X of the two-component hardening material in a cylindrical shape on the target ground G along the driving trajectory of the injection rod 1.
【００２９】角型高圧切削水噴射ノズル３若しくは角型
重合噴射ノズル３からの切削水キャビテーション噴流の
噴射は周辺土壌を切削攪拌して、その後に上昇してくる
先端両側ノズル２からの硬化材キャビテーション噴流の
硬化材到達距離を延伸すると共に、パッキング噴流とし
ても作用し、地内圧等による噴射硬化材の上昇を押さえ
密度の高い硬化材層を造成することができる。The injection of the cutting water cavitation jet from the square high-pressure cutting water injection nozzle 3 or the square polymerization injection nozzle 3 cuts and agitates the surrounding soil, and then hardens the material cavitation from the nozzles 2 on both ends of the tip which rises thereafter. In addition to extending the reach of the hardening material of the jet, it also acts as a packing jet, thereby suppressing the rise of the spray hardening material due to ground pressure or the like, thereby forming a hardening material layer having a high density.
【００３０】また、その３流路13、その４流路14が連通
する角型重合噴射ノズル３の核ノズル31、囲周ノズル32
に供給する流体を粘性水もしくは高分子ポリマー溶液と
し、核ノズル31からの流体を高圧で、囲周ノズル32から
の流体を核ノズル31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れば、破砕効果を更に高め
ることができる。Further, the nucleus nozzle 31 and the surrounding nozzle 32 of the square polymerization injection nozzle 3 to which the three flow paths 13 and the four flow paths 14 communicate.
If the fluid supplied to the viscous water or the polymer solution is high, the fluid from the core nozzle 31 is injected at a high pressure, and the fluid from the surrounding nozzle 32 is injected at a low pressure from the core nozzle 31 to be jetted as a cavitation jet for polymerization. The crushing effect can be further enhanced.
【００３１】このように重合噴射ノズル31、32からの噴
流はパッキング噴流としても作用し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 jets from the polymerization injection nozzles 31 and 32 also act as packing jets, and the ground pressure and the excess slime of the high-pressure injection are drawn in the injection direction by the jet barrier and the acceleration force, so that an appropriate injection environment is created. The extension of the reach of the injection hardening material increases because of the retention, and the extension of the reach increases the mixing capacity of the injection region.
【００３２】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, the sludge discharge phenomenon caused by the ejection of the slime has conventionally occurred, but the hardening material can be continuously mixed into the soil with almost no sludge.
【００３３】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部分に同様の注入層を順次造成
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。The injection layer X formed as described above is formed by forming similar injection layers sequentially in the portion adjacent to the injection layer X as necessary, and then sequentially adjoining the injection layer X in a predetermined shape.
A predetermined ground hardened layer is formed.
【００３４】[0034]
【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攪拌翼ロッドの施工
状況を示す全体側面図FIG. 2 is an overall side view showing a working state of a stirring blade rod according to another embodiment of the present invention.
【図３】本発明の実施例による注入ロッド先端部の要部
構造を示す縦断拡大側面図FIG. 3 is an enlarged longitudinal sectional side view showing a main part structure of a tip end portion of an injection rod according to an embodiment of the present invention.
【図４】図３におけるＡ−Ａ断面図FIG. 4 is a sectional view taken along line AA in FIG. 3;
【図５】本発明の他の実施例による攪拌翼を設けた場合
における注入ロッド先端部の要部構造を示す縦断部分拡
大側面図FIG. 5 is an enlarged longitudinal sectional side view showing a main structure of a tip end portion of an injection rod when a stirring blade according to another embodiment of the present invention is provided.
【図６】図５におけるＢ−Ｂ断面図FIG. 6 is a sectional view taken along line BB in FIG. 5;
【図７】角型ノズルの実施例を示す注入ロッドノズル部
の拡大正面図FIG. 7 is an enlarged front view of an injection rod nozzle portion showing an embodiment of a square nozzle.
【図８】攪拌翼ロッド角型ノズルの実施例を示す注入ロ
ッドノズル部の拡大正面図FIG. 8 is an enlarged front view of an injection rod nozzle showing an embodiment of a stirring blade rod square nozzle.
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 ２ 先端両側ノズル 21 先端両側ノズルの流路合流部 ３ 上部高圧流体噴射ノズル・角型重合噴射ノズル 31 角型核ノズル 32 角型囲周ノズル 33 削孔水噴出孔 ４ コンポジット硬装攪拌翼 41 掘削翼 42 ロッド継手手段 ５ スイベル 51 噴射材料供給ホース ６ バックホウ型の移動装置 ７ 注入ロッド作動機構 Ｇ 対象地盤 Ｘ 硬化材注入層 DESCRIPTION OF SYMBOLS 1 Injection rod 11 1st flow path 12 2nd flow path 13 3rd flow path 14 4th flow path 2 Both end nozzles 21 Converging part of both end nozzle flow paths 3 Upper high-pressure fluid injection nozzle / square polymerization injection nozzle 31 Angle Mold core nozzle 32 Square-shaped surrounding nozzle 33 Drilling water jetting hole 4 Composite hard stirring agitator blade 41 Drilling blade 42 Rod joint means 5 Swivel 51 Injection material supply hose 6 Backhoe type moving device 7 Injection rod operating mechanism G Target ground X Hardening material injection layer
フロントページの続き (58)調査した分野(Int.Cl.7，ＤＢ名) E02D 3/12 102 Continuation of the front page (58) Field surveyed (Int.Cl. 7 , DB name) E02D 3/12 102
Claims (11)
いて合流させ、合流部の先において両側に分岐して開口
する先端両側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、その１流路に高圧硬化材、その２流
路にその１流路より低圧の硬化材を圧送して合流させ、
差圧共振による発生気泡を含む硬化材噴流を先端両側ノ
ズルから噴射し、噴射衝撃によるキャビテーション噴流
として噴射しつつ回動ながら、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較差圧
合流によるキャビテーション噴流地盤硬化層造成工法1. An injecting rod provided with a nozzle at both ends at the end of a merging portion, wherein the first and second flow passages are merged in a rod, and branched and opened on both sides at the tip of the merging portion. A high-pressure hardening material in the one flow path, and a low-pressure hardening material from the one flow path in the two flow paths under pressure;
By injecting a hardening material jet containing bubbles generated by differential pressure resonance from the nozzles on both ends of the tip, rotating and retreating while jetting as a cavitation jet by the jet impact,
Cavitation jet ground hardened layer formation method by differential pressure consolidation characterized by injecting hardened material into target ground
部に高圧流体噴射ノズルを設け、先端両側ノズルからの
キャビテーション噴流の噴射と共に、高圧流体噴射ノズ
ルから切削噴流を噴射しつつ回動ながら、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記載の較差圧合流によるキャビテーション
噴流地盤硬化層造成工法2. A high-pressure fluid injection nozzle is provided at an upper portion at a predetermined distance from both nozzles on the front end, and retreats while rotating while ejecting a cutting jet from the high-pressure fluid injection nozzle together with the ejection of the cavitation jet from the nozzles on the front end. 2. A method for forming a ground hardened layer of cavitation jet by differential pressure confluence according to claim 1, wherein the hardened material is injected into the target ground by causing the ground to be hardened.
ルを噴射口を角型に構成した角型重合噴射ノズルに構成
し、その角型核ノズルから高圧切削噴流、角型囲周ノズ
ルから角型核ノズルからの切削噴流より低圧の切削噴流
を噴射するようにした請求項２記載の較差圧合流による
キャビテーション噴流地盤硬化層造成工法3. The high-pressure fluid injection nozzle above the nozzles on both sides at the tip is configured as a square polymerization injection nozzle having a square injection port, the high-pressure cutting jet from the square core nozzle, and the square high-pressure cutting jet from the square surrounding nozzle. 3. A method for forming a ground hardened layer of cavitation jet by differential pressure converging according to claim 2, wherein a cutting jet having a lower pressure is jetted than a cutting jet from a core nozzle.
と共に、ロッド側壁に張出させた攪拌翼を設け、先端両
側ノズル上部の高圧流体噴射ノズルを攪拌翼先端に開口
させるようにした請求項２記載の較差圧合流によるキャ
ビテーション噴流地盤硬化層造成工法4. A drilling water jetting hole is provided at the tip of the injection rod, and a stirring blade protruding from the side wall of the rod is provided to open a high-pressure fluid jet nozzle above the nozzle on both sides of the tip at the tip of the stirring blade. Cavitation jet ground hardened layer formation method by differential pressure confluence according to item 2
ルの角型核ノズルから高圧切削噴流、角型囲周ノズルか
ら角型核ノズルからの切削噴流より低圧の切削噴流を噴
射しながら、注入ロッドを回動下降させて対象地盤の所
定深度まで挿入するようにした請求項３記載の較差圧合
流と角型ノズルによるキャビテーション噴流地盤硬化層
造成工法5. Injection while jetting a high-pressure cutting jet from the square core nozzle of the square polymerization injection nozzle on the upper side nozzle on both sides of the tip, and a lower pressure cutting jet from the square peripheral nozzle from the square surrounding nozzle. 4. A method for forming a ground hardened layer with a cavitation jet by a differential pressure merging and a square nozzle according to claim 3, wherein the rod is rotated down and inserted to a predetermined depth of the target ground.
出し、攪拌翼先端の噴射口を角型に構成した高圧流体噴
射ノズルから高圧切削噴流を噴射しながら、注入ロッド
を回動下降させて対象地盤の所定深度まで挿入するよう
にした請求項４記載の較差圧合流によるキャビテーショ
ン噴流地盤硬化層造成工法6. The injection rod is rotated down while jetting drilling water from the injection hole at the tip of the injection rod and jetting a high-pressure cutting jet from a high-pressure fluid injection nozzle having a square injection port at the tip of the stirring blade. 5. The method of forming a ground hardened layer for cavitation jet by differential pressure confluence according to claim 4, wherein the ground is inserted to a predetermined depth of the target ground.
のＡ液、その２流路のその１流路より低圧の硬化材を瞬
結性硬化材のＢ液とした請求項１又は請求項２又は請求
項３又は請求項４又は請求項５又は請求項６記載の較差
圧合流によるキャビテーション噴流地盤硬化層造成工法7. The high-pressure hardening material in one of the channels is liquid A of the instantaneous hardening material, and the hardening material of a lower pressure than the one of the two channels is liquid B of the instantaneous hardening material. Cavitation jet ground hardened layer formation method by differential pressure confluence according to claim 1 or claim 2 or claim 3 or claim 4 or claim 5 or claim 6.
いて合流させ、合流部の先において両側に分岐して開口
する先端両側ノズルを設けた注入ロッドを前進後退機構
と回動機構を備える駆動機構によって支持し、その１流
路への圧送ポンプとその２への圧送ポンプの送圧力に、
その１流路への送圧力を高く、その２流路への送圧力を
低く設定する所定の較差を設けたことを特徴とする較差
圧合流によるキャビテーション噴流地盤硬化層造成装置8. An injecting rod provided with a nozzle on both ends which is joined by joining the first flow path and the second flow path in a rod, and is branched and opened on both sides at the end of the merging portion. Supported by the drive mechanism provided, the pressure of the pressure pump to the one channel and the pressure of the pressure pump to the second,
Cavitation jet ground hardened layer forming apparatus by differential pressure confluence, wherein a predetermined range is provided for setting a high pressure for sending to one flow path and a low pressure for sending to two flow paths.
部に高圧流体噴射ノズルを設けたことを特徴とする請求
項８記載の較差圧合流によるキャビテーション噴流地盤
硬化層造成装置9. A cavitation jet ground hardened layer forming apparatus by differential pressure confluence according to claim 8, wherein a high-pressure fluid injection nozzle is provided at an upper portion at a predetermined interval from both nozzles at the tip.
ズルを噴射口を角型に構成した角型重合噴射ノズルに構
成し、角型重合噴射ノズルの角型核ノズル流路への圧送
ポンプと角型囲周ノズル流路への圧送ポンプの送圧力
に、角型核ノズル流路への送圧力を高く、角型囲周ノズ
ル流路への送圧力を低く設定する所定の較差を設けたこ
とを特徴とする請求項９記載の較差圧合流によるキャビ
テーション噴流地盤硬化層造成装置10. A high-pressure fluid injection nozzle above the nozzles on both sides at the tip is configured as a square polymerization injection nozzle having a square injection port, and a pump for pumping the square polymerization injection nozzle to the square core nozzle flow path. A predetermined range is set for the pressure of the pressure feed pump to the mold surrounding nozzle flow path to set a high pressure for the square core nozzle flow path and a low pressure for the square surrounding nozzle flow path. The cavitation jet ground hardened layer forming apparatus by differential pressure confluence according to claim 9, characterized in that:
ると共に、ロッド側壁に張出させた攪拌翼を設け、先端
両側ノズル上部の高圧流体噴射ノズルを攪拌翼先端に開
口させるようにした請求項９記載の較差圧合流によるキ
ャビテーション噴流地盤硬化層造成装置11. A drilling water jetting hole at the tip of the injection rod, and a stirring blade protruding from the side wall of the rod, and a high-pressure fluid jet nozzle above the nozzle on both sides of the tip is opened at the tip of the stirring blade. Item 9. Cavitation jet ground hardened layer formation device by differential pressure confluence according to item 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000112300A JP3357648B2 (en) | 2000-04-13 | 2000-04-13 | Cavitation jet ground hardened layer formation method and device by differential pressure confluence |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000112300A JP3357648B2 (en) | 2000-04-13 | 2000-04-13 | Cavitation jet ground hardened layer formation method and device by differential pressure confluence |
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| Publication Number | Publication Date |
|---|---|
| JP2001295263A JP2001295263A (en) | 2001-10-26 |
| JP3357648B2 true JP3357648B2 (en) | 2002-12-16 |
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| JP5717148B2 (en) * | 2013-05-30 | 2015-05-13 | 前田建設工業株式会社 | Underground consolidated body construction method |
| KR101589531B1 (en) * | 2014-02-20 | 2016-01-29 | 이영식 | Boring machine for reinforcing earth using thereof |
| JP7398281B2 (en) * | 2020-01-08 | 2023-12-14 | ケミカルグラウト株式会社 | High pressure injection stirring method and injection equipment |
| CN114105381B (en) * | 2021-11-08 | 2023-12-26 | 徐州沃力能源科技有限公司 | Collision type uniform cavitation sewage treatment device and method thereof |
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