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EP1231326B1 - Druckinjektionskopf - Google Patents

Druckinjektionskopf Download PDF

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Publication number
EP1231326B1
EP1231326B1 EP02290261A EP02290261A EP1231326B1 EP 1231326 B1 EP1231326 B1 EP 1231326B1 EP 02290261 A EP02290261 A EP 02290261A EP 02290261 A EP02290261 A EP 02290261A EP 1231326 B1 EP1231326 B1 EP 1231326B1
Authority
EP
European Patent Office
Prior art keywords
injection head
nozzle
duct
forming means
injection
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 - Lifetime
Application number
EP02290261A
Other languages
English (en)
French (fr)
Other versions
EP1231326A1 (de
Inventor
Jacques C/O Compagnie du Sol Morey
Jean-Claude c/o Compagnie du Sol Gessay
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Compagnie du Sol SARL
Original Assignee
Compagnie du Sol SARL
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Compagnie du Sol SARL filed Critical Compagnie du Sol SARL
Publication of EP1231326A1 publication Critical patent/EP1231326A1/de
Application granted granted Critical
Publication of EP1231326B1 publication Critical patent/EP1231326B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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

Definitions

  • the subject of the present invention is an injection head under pressure of a liquid to drill an excavation in the ground and in particular an injection head for implementing the technique known as Anglo-Saxon term of "jet grouting".
  • jet grouting consists in disaggregating the ground using a very high kinetic energy liquid jet set up works in a borehole, the jet of liquid causing soil erosion in which we want to excavate.
  • a nozzle which is attached to the end of the drill rods, these rods allowing both the routing to the nozzle or the nozzles of the liquid under high pressure and progressive translation of the nozzle in the ground.
  • the nozzle (s) are mounted on a member called the most often monitor or injection head which is attached to the lower end of the drill string, this monitor can itself be equipped at its end bottom of a mechanical drilling tool.
  • the liquid used most often is a cement-based grout that will allow, after drilling, to make a cement floor element molded into the ground in square.
  • the liquid which is carried by the rods is sent from the surface by a pump at pressures from one to several tens of MPa.
  • the internal diameter of the rods carrying the liquid must be enough great for limiting pressure drops in the rods. This diameter can typically be of the order of 20 to 50 mm.
  • the diameter of nozzle outlet should be reduced enough to print liquid a sufficient speed at its exit in order to erode the ground at a distance.
  • the outlet diameter of the nozzle is included, the more often between 2 and 5 mm and the speed of the liquid leaving the nozzle is one to several hundred meters per second.
  • the inner shape of the nozzle is optimized to keep the liquid jet as high a speed as possible as the jet moves away from the nozzle towards the ground so that it can erode the ground the most possible by using a minimum of kinetic energy.
  • the injection head of the Japanese patent is composed of a liquid supply line connected to a nozzle by a tubing substantially constant section and the mean line of curvature has the regular shape of a quarter circle.
  • the axis of the nozzle is perpendicular to the axis of the injection head so that the direction main of the liquid jet undergoes a deviation of 90 degrees between the inlet of the tubing and the outlet of the nozzle. As this deviation occurs over a very short distance, this results in pressure losses in the tubing.
  • FIG. 1 there is shown the head injection device described in US Patent 5,228,809.
  • the injection head 10 comprises a body 12 having a side wall 14 defining a internal cavity.
  • a pressurized liquid injection nozzle 16 is mounted in the external wall 14 of the monitor.
  • elements 18 for connection to the drill string and elements 20 and 22 for connection to the liquid line under pressure and to an annular air duct circulating in the rods so simultaneously supply the liquid nozzle and an annular air nozzle 16.
  • the nozzle 16 is supplied from the line 22 conveying the pressurized liquid through a passage 24 provided in the body of the monitor 10 and by a tube 26 connecting the end of this passage at the entrance to the nozzle 16.
  • the tubing 26 which has a constant section has a regular curvature in order to limit disturbances pressurized liquid between the drill pipe and the nozzle 16 itself.
  • the injection nozzle has a very large diameter. reduced compared to the diameter of the pipe used to convey the liquid under pressure through the rods.
  • An object of the present invention is to provide a head especially for the implementation of the jet grouting which allows to improve more significantly the quality of the jet provided by the nozzle (s) the injection head mounted at the lower end of the drill string.
  • the invention relates to a head for injecting pressure of a soil erosion liquid, mounted at the end of a train of rods or tubes, said train comprising means for pressurized liquid supply, said head comprising a body having an upper end for connection to the lower end of the drill string or tubes and an external wall, body in which is mounted at least one injection nozzle whose diameter d 'inlet is equal to d , and which has an axis x, x', and means forming a conduit for connecting the liquid supply to the inlet of said nozzle, said means forming a conduit having a mean line the first end of which is connected to the axis of the liquid supply pipe at its lower end and the second end of which is tangentially connected to the axis x, x 'of the nozzle, said mean line being defined by at least a portion of curve e continuous and continuously differentiable, injection head according to which the cross section of said means forming a conduit decreases regularly over at least half of its length from its first end to
  • the quality and direction of the jet produced by the nozzle are significantly improved due to the gradual reduction and regular cross-section of the duct forming means, for example tubing, at least half its length from its end for connection to the pressure liquid supply line until it is connected to the inlet port of the injection nozzle.
  • This characteristic combined with the fact that the mean line of means forming a conduit has a radius of curvature, which varies regularly, minimizes disruption of liquid flow in this tubing and therefore to obtain a jet whose energy is maximum and whose erosive power is kept at a maximum distance from the nozzle in the field.
  • the axis of said supply line substantially coincides with the axis of the body of the injection head.
  • the mean line of the means forming a conduit comprises a first part of the curve extending between the first end and an intermediate point and having a regular curvature, the concavity of which has a first sign and a second portion of the curve between said intermediate point and the second end having a regular curvature whose concavity has an opposite sign.
  • the liquid line under pressure extends into said injection head and the first end of the conduit means is a side tap on said pipe substantially tangential to said pipe.
  • the injection head 30 shown in Figure 2 has a body 32 consisting of a cylindrical side wall 34, one end lower 36 comprising means, for example a thread 38, of attachment of a mechanical drilling tool and an upper end 40.
  • This upper end 40 comprises on the one hand a thread 42 of connection to the lower end of a drill pipe 44 and other share an internal sleeve 46 for connection to the pipe 48 formed in the drill pipe 44 for conveying the pressurized liquid which is most often, as we have already indicated, a grout.
  • the annular space 50 between the rod borehole 44 and the pipe 48 is used to convey pressurized air. he goes of course, in some embodiments, we would not find this annular space.
  • the side wall 34 of the injection head is provided with an injection nozzle 50 of axis x, x '.
  • the axis x, x 'of the nozzle 50 is substantially perpendicular to the vertical axis z, z 'of the injection head but, in other embodiments, the axis could make an angulation with the horizontal, for example, between + 15 degrees and - 15 degrees.
  • the nozzle can be in horizontal projection, perpendicular to the external wall of the monitor (nozzle 50 'in FIG. 4) or substantially tangential to this wall (nozzle 50 "in Figure 5) or its axis xx 'can occupy any orientation intermediate.
  • a tube 54 used to connect the supply 46 in pressurized liquid at the inlet 50a of the nozzle 50.
  • S1 is called the cross section of the line 46 for supplying pressurized liquid and s1 the straight section of the inlet of the nozzle 50.
  • the tubing 54 of which call L the middle line has a first end 56 of connection to line 46 and a second end 58 of connection to the nozzle.
  • the first end 56 of the tubing 54 has a straight section S'1 equal to section S1 and its second end has a straight section s'1 equal to the section s1 of the nozzle.
  • the cross section of the tubing 54 that is to say the section of this tubing by planes orthogonal to the mean line L decreases regularly from the value S'1 to the value s'1.
  • the tubing 54 may include portions of cylindrical tubing of very limited length.
  • the cross section of the tubing can be circular but it can also have an oval shape, an ellipse shape, etc.
  • the end sections 56 and 58 are generally circular, but they can also be elliptical.
  • the middle line L of the tube 54 has a non-constant curvature but which varies regularly.
  • the middle line L of the tube 54 comprises a first portion L 1 which goes from the end 56 to an intermediate point A and a second portion L 2 which goes from the intermediate point A to 'at the second end 58.
  • the portion L 1 has a radius of curvature which keeps the same sign, the same applies to the portion L 2 but the sign of this last radius of curvature is the opposite of that of the portion L 1 .
  • the portions L 1 and L 2 are tangentially connected but the mean line L has an inflection point at point A.
  • This embodiment makes it possible in particular thanks to the portion L 2 of the mean line and therefore the corresponding portion of tubing to increase the length of the part of the tubing having a large radius of curvature in its zone of connection to the nozzle.
  • This arrangement makes it possible to stabilize even better the flow of the liquid under pressure in the tube 54 near the nozzle 50.
  • tubing 54 could have other shapes as soon as when its middle line shows regular variations in curvature and that its cross section decreases substantially regularly from its first end 56 to its second end 58 of connection to the nozzle.
  • Tubing may have only one radius of curvature and also might not have a midline arranged in a plane but be constituted by a form of propeller or spiral, that is, to be a three-dimensional curve.
  • the tube 54 shown in FIG. 2 it is possible to increase the total length of the mean line L of this tube while maintaining the external dimensions of the useful part of the head. injection at reduced values corresponding to the diameter D 1 and the height H 1 .
  • the increase in the length of the tube 54 makes it possible to improve the progressiveness of the reduction in cross section for straight sections given at the two ends of the tube.
  • the diameter D 1 is less than 15 cm and the useful height of the injection head H 1 is less than 50 cm.
  • FIG. 3 shows a second embodiment of a monitor according to the invention.
  • This monitor essentially stands out by the fact that the line 48 for supplying pressurized liquid is extends into the monitor via a tool supply pipe 70 mechanical which can be fixed in the threaded sleeve 78. When it is mounted, the tool is supplied by line 70 via a controllable valve 72.
  • the first end 56 'of the tube 54' is a lateral stitching on the pipe 70.
  • this stitching is substantially tangential to the wall of the pipe 70.
  • the middle line L 'of tubing 54' is a three-point curve dimensions.
  • the tubing 54 is an element separate line, mounted in the body of the injection head.
  • the body of the head injection was carried out by molding and that the tubing 54 was produced during of this molding using an appropriate technique.
  • the body of the injection head would be a massive part in which the tube 54 would be formed by a recess.

Landscapes

  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Soil Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Paleontology (AREA)
  • Civil Engineering (AREA)
  • Agronomy & Crop Science (AREA)
  • Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)
  • Earth Drilling (AREA)
  • Catching Or Destruction (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
  • Loading And Unloading Of Fuel Tanks Or Ships (AREA)
  • Nozzles (AREA)

Claims (10)

  1. Kopf zum Einspritzen unter Druck einer Flüssigkeit, um den Boden aus einer Bohrung zu lockern, wobei der Kopf am Ende eines Bohrgestänges oder Rohrsatzes angebracht ist, wobei das Gestänge Mittel für die Flüssigkeitszufuhr unter Druck enthält, wobei der Kopf einen Körper (32) aufweist, der ein oberes Ende (40) zum Anschluss an das untere Ende des Bohrgestänges oder Rohrsatzes sowie eine Außenwand (34) hat, wobei in dem Körper wenigstens eine Einspritzdüse (50), deren Eingangsdurchmesser gleich d ist und die eine Achse x,x' aufweist, sowie eine Leitungsröhre bildende Mittel zum Anschließen der Flüssigkeitszufuhr an den Eingang der Düse angeordnet sind, wobei die eine Leitungsröhre bildenden Mittel (54, 54') eine mittlere Leitung (L) aufweisen, deren erstes Ende (56) an die Achse der Flüssigkeitszufuhrleitung (48) an ihrem unteren Ende angeschlossen ist und deren zweites Ende (58) tangential an die Achse x,x' der Düse (50) angeschlossen ist, wobei die genannte mittlere Leitung (L) durch wenigstens einen kontinuierlichen und kontinuierlich ableitbaren Kurventeil definiert ist, Einspritzkopf nach dem der Querschnitt der eine Leitungsröhre bildenden Mittel über wenigstens die Hälfte ihrer Länge von ihrem ersten Ende bis zu ihrem mit der Düse (50) verbundenen zweiten Ende regelmäßig abnimmt.
  2. Kopf zum Einspritzen nach Anspruch 1, dadurch gekennzeichnet, dass die Flüssigkeitszufuhrmittel eine Druckflüssigkeitsleitung (48) aufweisen, die über eine Leitung (70) zum Speisen eines Werkzeugs in den Einspritzkopf verlängert ist, und dass das erste Ende der eine Leitungsröhre bildenden Mittel (54') eine Seitenrohrabzweigung (56') an der Leitung (70) zum Speisen des Werkzeugs ist, wobei die Seitenrohrabzweigung im Wesentlichen tangential zu der genannten Leitung ist.
  3. Kopf zum Einspritzen unter Druck nach Anspruch 1, dadurch gekennzeichnet, dass das erste Ende (56) der mittleren Leitung (L) der eine Leitungsröhre bildenden Mittel (54) tangential an die Achse des unteren Endes der Flüssigkeitszufuhrleitung (48) angeschlossen ist.
  4. Kopf zum Einspritzen unter Druck nach Anspruch 1, dadurch gekennzeichnet, dass die Achse der Flüssigkeitszufuhrleitung (48) im Wesentlichen mit der Achse des Körpers (32) des Einspritzkopfes zusammenfällt.
  5. Kopf zum Einspritzen unter Druck nach Anspruch 4, dadurch gekennzeichnet, dass die mittlere Leitung (L) der eine Leitungsröhre bildenden Mittel (54) einen ersten Kurventeil (L1) aufweist, der sich zwischen dem ersten Ende (56) und einem Zwischenpunkt (A) erstreckt und eine regelmäßige Krümmung aufweist, deren Konkavität ein erstes Vorzeichen aufweist, sowie einen zweiten Kurventeil (L2), der sich zwischen dem Zwischenpunkt (A) und dem mit der Düse (50) verbundenen zweiten Ende (58) erstreckt und eine regelmäßige Krümmung aufweist, deren Konkavität ein entgegengesetztes Vorzeichen aufweist.
  6. Kopf zum Einspritzen nach irgendeinem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass die eine Leitungsröhre bildenden Mittel (54, 54') einen im Wesentlichen kreisrunden Querschnitt aufweisen.
  7. Kopf zum Einspritzen nach irgendeinem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass die eine Leitungsröhre bildenden Mittel (54, 54') einen ovalen Querschnitt aufweisen.
  8. Kopf zum Einspritzen nach irgendeinem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass er eine Vielzahl von Einspritzdüsen und eine Vielzahl von eine Leitungsröhre bildenden Mitteln aufweist, wobei ein jedes an eine Einspritzdüse angeschlossen ist.
  9. Kopf zum Einspritzen nach irgendeinem der Ansprüche 1 bis 8, dadurch gekennzeichnet, dass die eine Leitungsröhre bildenden Mittel (54, 54') aus einem von dem Körper (32) des Einspritzkopfes getrennten Rohrstutzen bestehen.
  10. Kopf zum Einspritzen nach irgendeinem der Ansprüche 1 bis 8, dadurch gekennzeichnet, dass der Körper des Einspritzkopfes durch Formen hergestellt ist und dass die eine Leitungsröhre bildenden Mittel während des Formens hergestellt werden.
EP02290261A 2001-02-12 2002-02-05 Druckinjektionskopf Expired - Lifetime EP1231326B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0101856 2001-02-12
FR0101856A FR2820780B1 (fr) 2001-02-12 2001-02-12 Tete d'injection sous pression d'un liquide pour forer une excavation dans le sol

Publications (2)

Publication Number Publication Date
EP1231326A1 EP1231326A1 (de) 2002-08-14
EP1231326B1 true EP1231326B1 (de) 2004-04-21

Family

ID=8859884

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02290261A Expired - Lifetime EP1231326B1 (de) 2001-02-12 2002-02-05 Druckinjektionskopf

Country Status (9)

Country Link
US (1) US6648084B2 (de)
EP (1) EP1231326B1 (de)
AT (1) ATE264952T1 (de)
DE (1) DE60200384T2 (de)
DK (1) DK1231326T3 (de)
ES (1) ES2220878T3 (de)
FR (1) FR2820780B1 (de)
HK (1) HK1049866B (de)
PT (1) PT1231326E (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2463443A1 (de) 2010-12-13 2012-06-13 Soilmec S.p.A. Einspritzkopf zum Einspritzen konsolidierender unter Druck stehender Flüssiggemische in den Boden
EP3489418A1 (de) 2017-11-23 2019-05-29 VSL International AG Hocheffizienter injektionskopf zur injektion konsolidierender fluidgemische unter druck in den boden

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10236257A1 (de) * 2002-08-09 2004-02-26 Stump Spezialtiefbau Gmbh Düsenstrahlvorrichtung
FR2843609B1 (fr) * 2002-08-13 2004-10-29 Cie Du Sol Tete d'injection sous pression d'un fluide pour desagreger le terrain a partir d'un forage
US7040423B2 (en) 2004-02-26 2006-05-09 Smith International, Inc. Nozzle bore for high flow rates
US20060070740A1 (en) * 2004-10-05 2006-04-06 Surjaatmadja Jim B System and method for fracturing a hydrocarbon producing formation
ITPC20050020A1 (it) * 2005-04-08 2006-10-09 Cesare Melegari Metodo e attrezzatura per la realizzazione di micropali nel terreno
US7484575B2 (en) * 2005-04-27 2009-02-03 Frank's Casing Crew & Rental Tools, Inc. Conductor pipe string deflector and method
US20090266559A1 (en) * 2005-12-03 2009-10-29 Frank's International, Inc. Method and apparatus for installing deflecting conductor pipe
US7694608B2 (en) * 2005-12-20 2010-04-13 Smith International, Inc. Method of manufacturing a matrix body drill bit
US8371369B2 (en) * 2007-12-04 2013-02-12 Baker Hughes Incorporated Crossover sub with erosion resistant inserts
IT1401219B1 (it) * 2010-07-15 2013-07-12 Trevi Spa Testa di iniezione per iniettare miscele consolidanti fluide pressurizzate nel terreno.
US9097104B2 (en) 2011-11-09 2015-08-04 Weatherford Technology Holdings, Llc Erosion resistant flow nozzle for downhole tool
WO2014032006A1 (en) 2012-08-23 2014-02-27 Ramax, Llc Drill with remotely controlled operating modes and system and method for providing the same
US10094172B2 (en) 2012-08-23 2018-10-09 Ramax, Llc Drill with remotely controlled operating modes and system and method for providing the same
AU2014201020B2 (en) 2013-02-28 2016-05-19 Weatherford Technology Holdings, Llc Erosion ports for shunt tubes
JP2017166135A (ja) * 2016-03-14 2017-09-21 株式会社オーケーソイル 地盤改良装置および地盤改良方法

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6153912A (ja) * 1984-08-24 1986-03-18 Yuji Kaneko 円柱状硬化壁の造成による地盤改良方法
JPS61207712A (ja) * 1985-03-12 1986-09-16 N I T:Kk 地盤改良工法及びその装置
US5228809A (en) 1989-01-27 1993-07-20 Kajima Corporation Consolidating agent injecting apparatus and injecting apparatus for improving ground
JP3614211B2 (ja) * 1995-07-11 2005-01-26 ケミカルグラウト株式会社 注入装置
JP3218369B2 (ja) * 1997-01-09 2001-10-15 株式会社日東テクノ・グループ 地盤改良装置

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2463443A1 (de) 2010-12-13 2012-06-13 Soilmec S.p.A. Einspritzkopf zum Einspritzen konsolidierender unter Druck stehender Flüssiggemische in den Boden
EP3489418A1 (de) 2017-11-23 2019-05-29 VSL International AG Hocheffizienter injektionskopf zur injektion konsolidierender fluidgemische unter druck in den boden

Also Published As

Publication number Publication date
ATE264952T1 (de) 2004-05-15
FR2820780A1 (fr) 2002-08-16
HK1049866A1 (en) 2003-05-30
FR2820780B1 (fr) 2003-05-02
HK1049866B (zh) 2004-09-10
PT1231326E (pt) 2004-08-31
EP1231326A1 (de) 2002-08-14
DE60200384D1 (de) 2004-05-27
US20020108752A1 (en) 2002-08-15
ES2220878T3 (es) 2004-12-16
US6648084B2 (en) 2003-11-18
DE60200384T2 (de) 2005-05-04
DK1231326T3 (da) 2004-08-16

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