EP1231326A1 - Druckinjektionskopf - Google Patents

Druckinjektionskopf Download PDF

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Publication number
EP1231326A1
EP1231326A1 EP02290261A EP02290261A EP1231326A1 EP 1231326 A1 EP1231326 A1 EP 1231326A1 EP 02290261 A EP02290261 A EP 02290261A EP 02290261 A EP02290261 A EP 02290261A EP 1231326 A1 EP1231326 A1 EP 1231326A1
Authority
EP
European Patent Office
Prior art keywords
injection head
conduit
nozzle
injection
line
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.)
Granted
Application number
EP02290261A
Other languages
English (en)
French (fr)
Other versions
EP1231326B1 (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 one wants to carry out an excavation.
  • 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 conveying the liquid must be sufficient 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 small enough to print liquid a sufficient speed at its exit in order to erode the ground at a distance. Typically, 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.
  • FIG. 1 there is shown the injection head described in this patent.
  • the injection head 10 comprises a body 12 having a side wall 14 defining an internal cavity.
  • a buzzard of pressurized liquid injection 16 is mounted in the external wall 14 of the monitor.
  • This figure also shows elements 18 for connection to the drill string and elements 20 and 22 of connection to the liquid pressure line and to a line annular air circulating in the rods to simultaneously supply the liquid nozzle and an annular air nozzle 16.
  • the nozzle 16 is supplied from the line 22 for conveying the liquid under pressure through a passage 24 provided in the body of the monitor 10 and by a tube 26 connecting the end of this passage to the inlet of the nozzle 16.
  • the tubing 26 which has a constant section has a curvature regular in order to limit the disturbances of the liquid under pressure between the drill pipe and the nozzle 16 itself.
  • the injection nozzle has a very small diameter compared to the diameter of the pipe used to convey the pressurized liquid to through the rods. The solution described in the mentioned US patent above is therefore not fully satisfactory.
  • 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 head for pressure injection of a soil erosion liquid mounted at the end of a train of rods or tubes, said train comprising supply means under liquid pressure
  • said head comprising a body having an upper end for connection to the lower end of the drill string or of tubes and an external wall, body in which is mounted at least one injection nozzle whose inlet diameter is equal to d , and which has an axis x, x ', and means forming a conduit for connecting the supply of liquid to the inlet of said nozzle
  • said injection head being characterized in that said means forming conduit have a medium line, the first end of which is connected to the lower end of the liquid supply pipe and the second end of which is connected tangentially to the axis x, x 'of the nozzle, said medium line being defined by at least one portion of the curve having a continuously varying radius of curvature, the cross section of said duct means decreasing regularly over at least half of its length from its first end to its second end.
  • 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 connection to the pressurized 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 body axis of the injection head and the middle line of the conduit means comprises a first part of the curve extending between the first end and an intermediate point with a regular curvature, the concavity 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 pipe 46 for supplying pressurized liquid and s1 the straight section of the inlet of the nozzle 50.
  • the pipe 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 terminal 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 portion 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 significantly 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 the tubing 54' is a three-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)
  • Injection Moulding Of Plastics Or The Like (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Catching Or Destruction (AREA)
  • Loading And Unloading Of Fuel Tanks Or Ships (AREA)
  • Nozzles (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
  • Earth Drilling (AREA)
EP02290261A 2001-02-12 2002-02-05 Druckinjektionskopf Expired - Lifetime EP1231326B1 (de)

Applications Claiming Priority (2)

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

Publications (2)

Publication Number Publication Date
EP1231326A1 true EP1231326A1 (de) 2002-08-14
EP1231326B1 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 (4)

* 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
EP1396585A1 (de) * 2002-08-13 2004-03-10 Compagnie Du Sol Kopf zur Einspritzung unter Druck von Flüssigkeiten von einem Bohrloch aus zum Zerkleinern von Erde
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 (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
CA2631405A1 (en) * 2005-12-03 2007-06-07 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

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4624606A (en) * 1985-03-12 1986-11-25 N.I.T. Co., Ltd. Foundation improvement process and apparatus thereof
JPH10195862A (ja) * 1997-01-09 1998-07-28 Nitto Techno Group:Kk 地盤改良装置

Family Cites Families (3)

* 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
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

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4624606A (en) * 1985-03-12 1986-11-25 N.I.T. Co., Ltd. Foundation improvement process and apparatus thereof
JPH10195862A (ja) * 1997-01-09 1998-07-28 Nitto Techno Group:Kk 地盤改良装置

Cited By (6)

* 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
WO2004020742A1 (de) * 2002-08-09 2004-03-11 Stump Spezialtiefbau Gmbh Düsenstrahlvorrichtung
EP1396585A1 (de) * 2002-08-13 2004-03-10 Compagnie Du Sol Kopf zur Einspritzung unter Druck von Flüssigkeiten von einem Bohrloch aus zum Zerkleinern von Erde
EP2463443A1 (de) * 2010-12-13 2012-06-13 Soilmec S.p.A. Einspritzkopf zum Einspritzen konsolidierender unter Druck stehender Flüssiggemische in den Boden
ITTO20100988A1 (it) * 2010-12-13 2012-06-14 Soilmec Spa Testa di iniezione per iniettare miscele consolidanti fluide pressurizzate nel terreno
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
US6648084B2 (en) 2003-11-18
FR2820780B1 (fr) 2003-05-02
EP1231326B1 (de) 2004-04-21
HK1049866A1 (en) 2003-05-30
ATE264952T1 (de) 2004-05-15
FR2820780A1 (fr) 2002-08-16
ES2220878T3 (es) 2004-12-16
DE60200384D1 (de) 2004-05-27
DE60200384T2 (de) 2005-05-04
HK1049866B (zh) 2004-09-10
DK1231326T3 (da) 2004-08-16
US20020108752A1 (en) 2002-08-15
PT1231326E (pt) 2004-08-31

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