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EP2535461B1 - Procédé et dispositif de fabrication d'éléments de sol - Google Patents

Procédé et dispositif de fabrication d'éléments de sol Download PDF

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Publication number
EP2535461B1
EP2535461B1 EP11170167.8A EP11170167A EP2535461B1 EP 2535461 B1 EP2535461 B1 EP 2535461B1 EP 11170167 A EP11170167 A EP 11170167A EP 2535461 B1 EP2535461 B1 EP 2535461B1
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EP
European Patent Office
Prior art keywords
tool
mixing
jet
jet grouting
ground
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP11170167.8A
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German (de)
English (en)
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EP2535461A1 (fr
Inventor
Christian Sigmund
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.)
Keller Holding GmbH
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Keller Holding GmbH
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Priority to PL11170167T priority Critical patent/PL2535461T3/pl
Priority to EP11170167.8A priority patent/EP2535461B1/fr
Publication of EP2535461A1 publication Critical patent/EP2535461A1/fr
Application granted granted Critical
Publication of EP2535461B1 publication Critical patent/EP2535461B1/fr
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    • 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
    • E02D3/126—Consolidating by placing solidifying or pore-filling substances in the soil and mixing by rotating blades

Definitions

  • the invention relates to a method and a device for the production of soil elements for ground improvement.
  • the so-called “deep soil stabilization” is used, which is also referred to as “Deep Soil Mixing” or “Deep Soil Mixing” (DSM).
  • DSM Deep Soil Mixing
  • the binder usually pure cement or cement-lime mixtures
  • the binder is introduced into the soil with the aid of air. This method is used in particular for soils with high water content or at freezing temperatures.
  • the binder is incorporated by mixing the soil with a suspension. One or more mixing tools are mechanically turned into the ground. When retracting or when extending the mixing tool, the binder is introduced into the soil. Subsequently, the soil-binder mixture hardens and forms a columnar element.
  • the mixing tool has a rotatable outer tube and a rotatable inner tube, at the lower end of which a cutting blade is arranged.
  • An upper mixing blade is attached to the lower end of the outer tube and a lower mixing blade is attached to the inner tube close to the lower end of the outer tube.
  • the two tubes are rotatable relative to one another by means of a gear, wherein a fixed ratio between the rotational movement of the outer tube relative to the rotational movement of the inner tube is predetermined by the transmission.
  • a supply line cement is introduced through a lower opening of the inner tube in the ground and mixed due to the rotational movement of the inner tube and outer tube to the ground.
  • the tool has nozzles between the drill bit and the blades, through which water is injected at high pressure into the soil at an angle during drilling.
  • a soil improvement method comprising a viable upper soil layer and an underlying soft layer having low bearing capacity.
  • the soft layer vertical columns are prepared by mixing in binder (Deep Soil Mixing). Tamping columns are placed in the overlying load-bearing soil layer.
  • JP 10212724 A From the JP 10212724 A is a tool with a drill pipe and a housing known to be screwed into the ground. As the drill string and housing are pulled, a high pressure binder is simultaneously injected from the ends of the blades radially outward into the soil. This results in an enlarged hardened outer layer. The incorporated binder partially flows into a core region and forms a core layer there.
  • JP 59010610 A From the JP 59010610 A is a tool with a drill head with sheaths known to which nozzles are provided. In addition, expandable cutting edges are provided which can be moved in and out radially by axial movement of a sleeve.
  • a drilling tool with a double-tube shaft assembly having outer and inner tubular shafts which are rotatable separately from one another is known.
  • the outer tubular shaft is provided on its outer surface with upper stirring and kneading means, and with radially outwardly directed liquid outlets.
  • the inner tubular shaft is provided with a drill bit, with bottom stirring and kneading means and with one or more downwardly directed liquid outlets.
  • the injection technique is used, which is also known as a jet stream method.
  • a well-adapted to the substrate conditions injection agent is pressed from wells under high pressures in the ground.
  • the so-called high-pressure injection process which is also known under company names such as Soilcrete or Jet Grouting process, represents a further development of the injection process.
  • a pipe is sunk under rinse aid. After reaching the final depth of suspension is pressed at the lower end of the tube located side nozzle suspension with high pressures and pulled the tube with slow rotation or pivotal movement. This creates a body by the soil is solved by the suspension jets and mixed.
  • the present invention has the object to improve a method for producing columnar elements of the type mentioned in that it is also applicable to unfavorable soils or at greater depths.
  • the object is further to suggest a corresponding device with which columnar elements can also be produced at great depths or in block layers or in clay soils.
  • the advantage is that treatment of immiscible soils superimposed on miscible soils is made possible.
  • deep deep soil stabilization deep soil mixing
  • soil layers which, due to their nature or depth, are not suitable for deep soil deep-soil stabilization (deep soil mixing)
  • a treatment by means of jet-jet technology can then be used.
  • a first columnar soil improvement body is thus produced in the shallower soil regions below which a second columnar, semi-column or lamellar soil improvement body is produced by means of the nozzle steel tool.
  • the design of the second floor improvement body can be designed as needed.
  • the nozzle jet tool is continuously rotated about its axis of rotation.
  • semi-columnar bodies can be created by pivoting the jet tool about the axis of rotation during drilling or pulling. Slats can be produced by partial introduction of suspension by means of the jet tool at different depths.
  • the upper body is supported on the lower body which redirects incoming forces down to a supporting soil layer. Both bodies together form a soil element for soil stabilization.
  • Another advantage of the method according to the invention is that hereby semi-columnar or columnar elements or lamellae can be produced to depths of more than 15 m.
  • the mixing tool and the jet tool are preferably sunk to the first depth T1 together.
  • the nozzle jet tool is taken up and guided with its linkage in the linkage for the mixing tool is.
  • the drill bit of the nozzle jet tool emerges from the linkage of the mixing tool at the lower end.
  • the mixing tool and the jet tool rotate about its common axis, wherein the rotational speeds are preferably controlled separately and in particular may be different.
  • the sinking of the mixing tool is stopped.
  • the nozzle jet tool is now sunk further into the ground, up to the intended final depth T2.
  • the jet tool is provided in particular that the mixing tool continues to rotate.
  • the mixing tool after a first process guide to rotate on the spot, that is, the axial position of the mixing tool remains unchanged.
  • the mixing tool is pulled up again when sinking the nozzle jet tool.
  • the mixing tool is pulled and lowered again several times, whereby a particularly good mixing of the upcoming soil is achieved in the first floor area.
  • the nozzle jet of the jet tool After reaching the final depth T2 of the nozzle jet of the jet tool is activated.
  • the nozzle jet tool is pulled upwards under pivoting motion, wherein water or a suspension emerges from one or more nozzles under high pressure and erodes the pending soil; simultaneously with the erosion of the soil cement suspension is supplied under pressure and mixed by the process-related turbulence in the immediate production area.
  • the operating pressure of the jet stream medium is above 200 bar.
  • the exit velocities of the jet stream medium are preferably more than 100 m / s.
  • the erosion width of the jet in the ground can reach up to 2.5 m from the borehole.
  • the liquid used for jet blasting is preferably a suspension of water with binder.
  • a binder in particular mortar, cement, Utrafeinzemente, silicate gels or plastic solutions in question.
  • the jet can be encased via a ring nozzle additionally compressed air.
  • the dissolution of the grain structure by means of the high-energy nozzle jet begins at the lowest point, that is, at the second depth T2. Excess water-soil-cement mixture flows from the nozzle-blasted second floor area over the well annulus through the upper first floor area.
  • a semi-column, columnar, or lamellar second floor improvement body is formed which is below the first floor area treated by Deep Soil Mixing and serves to improve the ground surface.
  • the blending tool may, after a first possibility, remain at the depth-depth, in particular continuing to rotate on the spot. After the nozzle jet tool has reached the first depth T1 again, the mixing tool and the nozzle tool are then pulled together upward. However, the jet of the jet tool is deactivated or brings the suspension only at a reduced pressure. In a second possibility, as the jet tool is drawn from the end depth T2 to the intermediate depth T1, the mixing tool is also pulled upwards. This procedure has the advantage that in the jet-jet process upward returning material is mixed in the first floor area.
  • the sinking and / or drawing of the mixing tool takes place with the introduction of a binder, with the curing of the binder, a columnar soil improvement body is formed.
  • the binder introduced with the mixing tool is selected according to the soil conditions or the requirements of the produced columnar bottom body and can be introduced in the wet or dry process in the soil.
  • Suitable binders for deep-reaching soil stabilization are the same binders mentioned in connection with jet blasting, in particular cement and / or lime, as well as ash, gypsum or mixtures of these Products.
  • the binder for the deep-reaching soil stabilization of the upper first soil layer may in principle be a different binder than the binder for the jet jetting in the underlying second soil layer.
  • the use of the same binder or the same binder suspension is preferred.
  • a particularly efficient process control is achieved if the return material of the spray injected by the jet-blasting tool is used at least partially for introduction into the first bottom area.
  • the upper first floor area is mixed again after completion of the jet of the second floor area by means of the mixing tool.
  • the soil has a higher shear strength, a lower permeability and a lower ductility or higher rigidity than the unrepaired soil.
  • the annular space formed between the nozzle jet linkage for the nozzle jet tool and the mixing rod for the mixing tool is flushed through with a liquid, at least during the nozzle jet process.
  • This controlled rinsing process prevents the suspension from undesirably penetrating into the annular space between the two rods.
  • the rinsing liquid used is preferably water.
  • the process ends with the drawing of the mixing tool and jet jet tool from the ground.
  • the pulling of the two tools as described above, done together or offset in time.
  • an apparatus for producing floor elements comprising a mixing tool for mixing soil with a binder and a jet blasting tool for eroding and mixing soil with a suspension, wherein the blending tool and the jet blasting tool are arranged coaxially with each other, and wherein the blending tool and the jet blasting tool are axially movable independently of each other. It is understood that in addition to the coaxial arrangement of mixing tool and jet tool still one or more other mixing tools can be provided. These may, for example, be arranged laterally adjacent to the mixing tool integrated with jet-jet tool.
  • the device advantageously permits soil stabilization down to great depths or the treatment of immiscible soils superimposed by miscible soils.
  • the advantages of Deep Soil Mixing for shallower soil layers are combined with those of jet grouting for deeper soil layers in that two soil enhancement bodies can be created, with a lower jet-cuboid and an overlying deep-soil mixing cubature. In this case, it results in a favorable manner in particular that the lower floor body produced by means of jet-jet tools have a greater strength than the upper floor body produced by means of deep-reaching soil improvement.
  • the nozzle jet tool and the mixing tool are independently driven to rotate.
  • the mixing of the upper floor area by means of the mixing tool on the one hand and the cutting of the lower floor area by means of the jet jet tool on the other hand can be adapted individually to the ground conditions with respect to the rotational speed.
  • this also applies to the axial movability of the mixing tool on the one hand and the nozzle jet tool on the other hand.
  • the floor elements produced with the device each have a homogeneous and adapted to the requirements structure.
  • the linkage of the jet tool is arranged within the linkage of the mixing tool.
  • the linkage of the mixing tool has at least one tube or hollow body, in which at least a part of the nozzle jet tool or of the nozzle jet linkage is guided rotatably and axially displaceably.
  • the inner diameter of the mixing rod is greater than the outer diameter of the nozzle beam linkage, so that the latter is axially movable in the former.
  • sealing means are provided here.
  • the sealing means may comprise one or more rotary seals, which are angeodnet in the annular space between an inner wall of the nozzle linkage and an outer wall of the mixing rod.
  • the seals are preferably provided at the lower end of the mixing rod.
  • rotary seal is meant that the seals allow a relative rotational movement of the nozzle beam linkage relative to the mixing linkage.
  • the mixing tool can be driven in rotation by a rotary head about an axis of rotation.
  • the jet tool is rotationally driven by a second rotary head.
  • the rotary head of the mixing tool can be controlled and driven separately from the rotary head of the jet-blasting tool. In this way, feed and rotational speed of the tools can be adjusted as needed to the different soil layers or drilling depths.
  • movements of the mixing tool are required which produce shear deformations in the soil.
  • preferably knife-like, in particular against each other rotating paddles or wings can be used.
  • the knives, paddles or wings are then filled depending on the floor with teeth, cutting or the like.
  • a Adaptation to the relevant subsoil conditions is required.
  • Single, double, triple or quad paddles can be used.
  • the addition of the binder can be done during retraction, extension or during extension and retraction of the mixing tool.
  • FIGS. 1 to 3 show a drill 2 with a device 11 according to the invention in a first embodiment.
  • the drill 2 stands on a floor surface 3 and faces the viewer.
  • a Switzerlandt 4 is fixed, which has vertically movable support means 5 for supporting a drill pipe 6, 7.
  • the drill string comprises a mixing rod 6 for a mixing tool 8 and a nozzle jet linkage 7 for a jet tool 9.
  • the mixing tool 8 is arranged at the lower end of the mixing rod 6 and has mixing paddles 17, 18 and boring helixes not further described here.
  • the nozzle jet tool 9 comprises one or more outlet nozzles 10, 10 'can be spread over the water or a suspension through the nozzle beam linkage 7, and a drill bit 12.
  • the mixing linkage 6 is guided through a through-boring head 23, by means of which the mixing rod 6 about an axis of rotation A. is rotationally driven.
  • the mixing tool 8 and the nozzle jet tool 9 are parts of the device 11 according to the invention for the production of soil elements for ground improvement in the ground.
  • the nozzle beam linkage 7 is connected via corresponding brackets or carriage with the broker 4 and movable relative to this.
  • a rotary drive 14 and a flushing head 22 are provided, which can both be moved vertically on the broker 4.
  • the rotary drive 14 is used for rotatable, respectively pivotable driving of the jet-beam linkage 7, wherein it is provided that the jet-jet linkage 7 can be driven independently of the mixing linkage 6.
  • the flushing head 22, also referred to as swivel is used to connect lines for introducing suspension, water or air, the lines are not shown.
  • the rotary head 23 for driving the mixing rod 6 is also connected via a corresponding bracket with the broker 4 and can be moved vertically relative to this.
  • the rotary head 23 with the mixing rod 6 or the rotary head 14 with the nozzle beam linkage 7 are lowered.
  • the rotary head 23 with mixing linkage 6 on the one hand and the rotary drive 14 with the nozzle jet linkage 7 on the other hand can be moved vertically independently of each other, which will be discussed in more detail below.
  • FIG. 2 showing the lower end of the device 11 according to the invention, further details can be seen.
  • the nozzle jet linkage 7 is arranged within the mixing linkage 6, in coaxial alignment with the axis of rotation A.
  • sealing means 16 are provided which prevent suspension or a soil-cement Mixture in this annulus 15 penetrates.
  • the sealing means 16 comprise three rotary seals arranged one above the other, which enable relative rotation of the jet-jet linkage 7 relative to the mixing linkage 6.
  • other suitable sealing means may be provided.
  • From the mixing tool 8 more mixing paddles 17, 18 are also recognizable, by means of which the pending soil is mixed during drilling.
  • the mixing paddles 17, 18 have a plurality of nozzles 19, 20, can be introduced via the binder or a suspension in the soil.
  • nozzle jet tool 9 can be seen that a plurality of outlet nozzles 10, 10 'distributed over the circumference. At the end of the nozzle jet tool 9 is the drill bit 12.
  • FIG. 3 further details of the drill are shown.
  • the rinsing head 22, which is connected to the nozzle jet linkage 7, is shown schematically. When jetting operating pressures for the jet stream of more than 200 bar, in particular of about 400 bar are generated.
  • Below the flushing head 22 is the turret 14 for driving the nozzle beam linkage 7 recognizable.
  • Below the rotary head 14 for the nozzle jet linkage 7 is the rotary head 23 for driving the mixing rod 6.
  • the rotary head 23 is designed as a through-drive rotary drive, that is, the mixing rod 6 is passed through the rotary drive 23.
  • sealing means 24, 25 are arranged between the upper section of the mixing rod 6 and the nozzle jet linkage 7 guided therein, which prevent dirt from penetrating into the annular space 15.
  • FIG. 4 shows a drill 2 with a device 11 according to the invention in a second embodiment.
  • the drill corresponds largely in terms of its structure and its operation in the FIG. 1 shown drill.
  • two further mixing tools 8 'and 8 are provided in addition to the apparatus 11 according to the invention with a mixing tool 8 and a jet nozzle 9.
  • a total of 3 mixing tools 8, 8', 8" with corresponding mixing rods 6, 6 ', 6 “and rotary actuators 23, 23', 23” provided.
  • the middle mixing tool 8 together with the nozzle jet tool 9 coaxially guided therein forms the device 11 according to the invention.
  • the three mixing tools 8, 8 ', 8 are moved via the respective drill rods 6, 6', 6" and the associated rotary drives 23, 23 '. 23 “together lowered to scrape the wellbore, thereby downplugging the jet-blast linkage 7 together with the mixing linkage 6.
  • the advantage of the present drilling rig 2 with three mixing tools 8, 8 ', 8" is that a comparatively larger wellbore for soil stabilization can be sunk to produce a bottom body 29 with the same width as that of the bottom body 30.
  • FIG. 5a shows the drill 2 according to FIG. 4 or the inventive method in the starting position.
  • the bottom layers 26, 27, 28 below the railing top edge 3 have a different texture.
  • the condition is such that the top bottom layer 26 with the addition of binder, for example cement or concrete, by means of mechanical mixing to a bottom body can be processed.
  • Underneath is a second bottom layer 27, which can no longer be processed with the mixing process (Deep Soil Mixing).
  • the lowermost soil layer 28 represents a load-bearing or water-impermeable bottom, which is to serve as a lower edge for the floor element to be created.
  • FIG. 5b shows the method after the first working step has been carried out, namely after the first bottom body 29 has been produced.
  • This first method step is accomplished by the three mixing tools 8, 8 ', 8 "next to one another being rotated about their respective axes A, A', A "be sunk. With the aid of the rotating mixing paddles 17, 17 ', 17 “, 18, 18', 18", the topmost bottom layer 26 is thoroughly mixed with the addition of a binder, in particular a cement or a binder suspension. This produces the first columnar bottom body 29.
  • the nozzle jet linkage 7 located in the middle mixing linkage 6 is not activated during the lowering of the mixing tools 8, 8 ', 8 ", but is lowered together with the middle mixing linkage 8. Deep Soil Mixing) provided depth T1 is reached, the Abteufen the mixing tools 8, 8 ', 8 "stopped. This position is in FIG. 5b shown.
  • the nozzle jet tool 9 is now further sunk into the ground, through the second bottom layer 27, to the intended end depth T2, which is defined herein by the boundary of the adjacent layers 27, 28.
  • FIG. 5c the state is shown after this second step.
  • the nozzle jet linkage 7 has been sunk down from the middle mixing linkage 6 into the lowest soil layer 28.
  • the jet jet linkage 7 is driven separately by means of the rotary head 14, that is to say independently of the drive of the mixing tools 8, 8 ', 8 "
  • the mixing tools 8, 8 ', 8 rotate preferably in place, that is, their vertical position remains unchanged.
  • a second bottom body 30 is produced by means of the jet-jet tool 9.
  • This third process step is in FIG. 5d shown.
  • the production of the second bottom body 30, which may also be referred to as a jet body, is accomplished by the jet-jet tool 9 being pulled upwards while being rotated, or by making pivoting movements, with water or one or more nozzles 10, 10 ' Suspension escapes under high pressure and erodes the pending soil. Simultaneously with the erosion or cutting of the soil cement suspension is supplied under pressure and mixed by the process-related turbulence.
  • the nozzle jet 31 as well as the jet body 30 already produced can be seen schematically. The process is carried out from the bottom up through the second bottom layer 27, from a depth slightly below the depth T2 lying down to the depth T1.
  • the mixing tools 8, 8 ', 8 may, after a first possibility, remain at the subsided depth T1 and continue to rotate there in. In an alternative process, the mixing tools 8, 8', 8" may also be used during the jet-blasting process be pulled up. After the third process step for producing the jet body is completed, that is, after the jet tool 9 has been pulled back to the depth T1, the jet tool 9 is deactivated.
  • FIG. 5e shows the state after the complete pulling of the mixing rod 6 and the nozzle beam linkage 7.
  • FIG. 6 the tools 7, 9 are shown schematically during the third process step, shortly before the completion of the jet body 30.
  • the mixing rods 8, 8 ', 8 "with the mixing paddles 17, 17', 17", 18 attached thereto are shown Furthermore, the nozzle jet linkage 7 coaxially guided in the middle mixing linkage 8 can be seen, and the nozzle jet 31, 31 'shown schematically emerges from the jet jet tool 9 on one or two sides Boden emotions 30 and the overlying by means of the mixing process (Deep Soil Mixing) produced upper bottom body 29 recognizable.
  • the mixing process Deep Soil Mixing
  • the device according to the invention or the method according to the invention has the advantage that a treatment of immiscible soils, which are superimposed by miscible soils, is made possible.
  • a first bottom body 29 is produced by means of deep soil stabilization (deep soil mixing).
  • a second soil-improving body 30 can be produced, which can be designed in the form of a semi-column, column or with one or more lamellae.
  • the upper body 29 is supported on the lower body 30, which is supported on a load-bearing bottom layer 28. Both bodies 29, 30 together form a bottom element 32 for soil stabilization.
  • the device according to the invention or the method according to the invention can be advantageously smaller devices to achieve greater depths use. Overall, the integration of Deep Soil Mixing and the jet blast process saves time and money.

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Structural Engineering (AREA)
  • Agronomy & Crop Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Soil Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Paleontology (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)

Claims (15)

  1. Procédé de fabrication d'éléments de sol, comportant les étapes opératoires suivantes :
    enfoncement d'un outil de mélange (8) sous mouvement rotatif jusqu'à une première profondeur (T1), le sol étant mélangé dans une première zone de sol (26) ;
    enfoncement d'un outil de projection à buse (9) jusqu'à une seconde profondeur (T2) en-dessous de la première zone de sol mélangée (26) ;
    traction de l'outil de projection à buse (9) de la seconde profondeur (T2) jusqu'à la première profondeur (T1) sous mouvement de rotation et de pivotement, le jet de buse étant activé, le sol étant érodé dans une seconde zone de sol (27) qui se situe en-dessous de la première zone de sol mélangée (26) et une suspension étend incorporée dans cette seconde zone de sol (27), l'outil de projection à buse (9) étant déplacé axialement indépendamment de l'outil de mélange (8) ; et
    traction de l'outil de mélange (8) et de l'outil de projection à buse (9) hors du sol.
  2. Procédé selon la revendication 1,
    caractérisé en ce que
    l'outil de mélange (8) et l'outil de projection à buse (9) sont enfoncés ensemble (T1) jusqu'à la première profondeur.
  3. Procédé selon la revendication 1 ou 2,
    caractérisé en ce que
    l'outil de mélange (8) continue à tourner lors de l'enfoncement de l'outil de projection à buse (9), en particulier sur place.
  4. Procédé selon une des revendications 1 à 3,
    caractérisé en ce que,
    lors de la traction de l'outil de projection à buse (9) depuis la seconde profondeur (T2) jusqu'à la première profondeur (T1), l'outil de mélange (8) est également tiré vers le haut.
  5. Procédé selon une des revendications 1 à 3,
    caractérisé en ce que
    l'outil de mélange (8), lors de la traction de l'outil de projection à buse (9) depuis la seconde profondeur (T2) jusqu'à la première profondeur (T1), reste dans sa position enfoncée et, une fois que l'outil de projection à buse (9) a atteint la première profondeur (T1), est tiré avec celui-ci vers le haut.
  6. Procédé selon une des revendications 1 à 5,
    caractérisé en ce que
    l'enfoncement et/ou la traction de l'outil de mélange (8) a lieu en l'incorporant un liant, un corps d'amélioration de sol (29) en forme de colonne se formant lors du durcissement du liant.
  7. Procédé selon une des revendications 1 à 6,
    caractérisé en ce que
    la suspension utilisée pour le jet de buse contient de l'eau et un liant hydraulique, un second corps d'amélioration de sol (30) se formant lors du durcissement du liant.
  8. Procédé selon une des revendications 1 à 7,
    caractérisé en ce que
    le matériau recyclé de la suspension injecté par l'outil de projection à buse (9) est utilisé au moins partiellement pour être incorporé dans la première zone de sol (26).
  9. Procédé selon une des revendications 1 à 8,
    caractérisé en ce que
    la première zone de sol (26), après la fin de la pulvérisation par buse de la seconde zone de sol (27), est à nouveau mélangée au moyen de l'outil de mélange (8).
  10. Procédé selon une des revendications 1 à 9,
    caractérisé en ce
    qu'un espace annulaire (15) formé entre la tige (7) de l'outil de projection à buse (9) et la tige (6) de l'outil de mélange (8) est rincé avec un liquide du moins pendant l'opération de pulvérisation par buse.
  11. Dispositif de fabrication d'éléments de sol, comprenant
    un outil de mélange (8) pour le mélange de sol avec un liant et un outil de projection à buse (9) pour l'érosion et le mélange de sol avec une suspension,
    dans lequel l'outil de mélange (8) et l'outil de projection à buse (9) sont disposés coaxialement l'un par rapport à l'autre,
    caractérisé en ce que
    l'outil de mélange (8) et l'outil de projection à buse (9) sont mobiles axialement indépendamment l'un de l'autre.
  12. Dispositif selon la revendication 11,
    caractérisé en ce que,
    pour entraîner l'outil de mélange (8), il est prévu un premier bouton rotatif (13) et, pour entraîner l'outil de projection à buse (9), un second bouton rotatif (14), le premier bouton rotatif (13) et le second bouton rotatif (14) pouvant être entraînés en rotation indépendamment l'un de l'autre.
  13. Dispositif selon la revendication 11 ou 12,
    caractérisé en ce que
    la tige de projection par buse (7) pour l'outil de projection à buse (9) est disposée dans la tige de mélange (6) de l'outil de mélange (8).
  14. Dispositif selon la revendication 13,
    caractérisé en ce que
    la tige de mélange (6) comprend au moins un tuyau dans lequel au moins une partie de la tige de projection par buse (7) est guidée avec possibilité de rotation et de décalage axial.
  15. Dispositif selon une des revendications 11 à 14,
    caractérisé en ce
    qu'un espace annulaire (15) formé entre la tige de mélange (8) et l'outil de projection à buse (9) ou la tige de projection par buse (7) est isolé grâces à des moyens d'étanchéité (16).
EP11170167.8A 2011-06-16 2011-06-16 Procédé et dispositif de fabrication d'éléments de sol Active EP2535461B1 (fr)

Priority Applications (2)

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PL11170167T PL2535461T3 (pl) 2011-06-16 2011-06-16 Sposób i urządzenie do wytwarzania elementów gruntowych
EP11170167.8A EP2535461B1 (fr) 2011-06-16 2011-06-16 Procédé et dispositif de fabrication d'éléments de sol

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EP2535461B1 true EP2535461B1 (fr) 2016-09-28

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Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5910610A (ja) 1982-07-09 1984-01-20 Kobe Steel Ltd 地盤改良装置
JPS5915118A (ja) * 1982-07-16 1984-01-26 Kokudo Sogo Kensetsu Kk 地盤改良装置
DE69013136D1 (de) * 1990-01-11 1994-11-10 Seiko Kogyo K K Doppelrohreinrichtung zum Bohren und Kneten und Methode zur Verbesserung von Fundamentgrund mit dieser Doppelrohreinrichtung zum Bohren und Kneten.
DE4311917C2 (de) * 1992-12-29 1995-12-14 Keller Grundbau Gmbh Verfahren zum Herstellen von Verfestigungsbereichen
US5560739A (en) * 1993-11-16 1996-10-01 Kabushiki Kaisha Ask Kenkyusho Method of forming a modified ground in an earthen foundation
JP3494236B2 (ja) 1994-06-23 2004-02-09 ケミカルグラウト株式会社 機械攪拌装置
JPH10212724A (ja) 1997-01-31 1998-08-11 Onoda Chemico Co Ltd 地盤改良工法
AT409007B (de) 1997-10-28 2002-05-27 Keller Grundbau Gmbh Herstellung von aushöhlungen und deren verfüllung im untergrund zum zweck der bodenstabilisierung
EP1045073A1 (fr) 1999-04-15 2000-10-18 TREVI S.p.A. Outil d'excavation et procédé de fabrication d'une colonne en sol consolidée
DE19960023A1 (de) 1999-12-13 2001-06-28 Keller Grundbau Gmbh Aktive Gründung
DE10327470B3 (de) 2003-06-18 2004-09-30 Bauer Spezialtiefbau Gmbh Vorrichtung zur Herstellung von Einzelschlitzen oder durchgehenden Wänden im Erdreich nach dem Mixed-in-Place-Verfahren
DE10333613B4 (de) 2003-07-24 2011-06-30 Keller Grundbau GmbH, 63067 Verbesserung einer Weichschicht

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PL2535461T3 (pl) 2017-04-28

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