EP2730702B1 - Procédé et dispositif de fabrication de dépôts parallèles au moyen d'outils à jet - Google Patents

Procédé et dispositif de fabrication de dépôts parallèles au moyen d'outils à jet Download PDF

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Publication number
EP2730702B1
EP2730702B1 EP12190925.3A EP12190925A EP2730702B1 EP 2730702 B1 EP2730702 B1 EP 2730702B1 EP 12190925 A EP12190925 A EP 12190925A EP 2730702 B1 EP2730702 B1 EP 2730702B1
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EP
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Prior art keywords
jet
tools
tool
depth
jet tool
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German (de)
English (en)
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EP2730702A1 (fr
Inventor
Wolfgang Wehr
Christian Sigmund
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Keller Holding GmbH
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Keller Holding GmbH
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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 for soil improvement by means of jet-jet technology.
  • the pending in the field of the wellbore soil is cut or eroded using a jet of water or cement suspension, which can also be coated with air.
  • the eroded soil is rearranged and mixed with cement slurry.
  • With the nozzle jet process components of various geometric shapes can be produced.
  • the load-bearing capacity of the soil can be improved, settlements avoided or ground can be solidified, for example in underpinning; likewise, the method can be used for sealing, for example under dams or excavation pits.
  • a jet-blast method for soil improvement is known to increase its carrying capacity.
  • binder suspension is injected from a plurality of distributed over a soil surface on a surface grid arranged holes in the upcoming soil.
  • the injections are applied in the jet stream immediately after drilling from a suitably prepared drill string.
  • 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 are located by located at the bottom of the tube side nozzles high-energy cutting jets from a suspension with high pressures pressed into the ground and pulled the tube with slow rotation or pivoting motion. This results in a columnar volume, which hardens by the introduced binder to a solid body.
  • various geometric elements can be produced, such as half-columns or lamellae.
  • a multiple nozzle jet method and apparatus is known.
  • a double-walled linkage is provided, is injected from the cement from several laterally arranged nozzles simultaneously in the ground.
  • several bodies are produced adjacent to one another in succession.
  • the present invention has for its object to provide a method for soil improvement, which provides a particularly high erosion performance in the production of the jet body or with the high tightness between two adjacent jet bodies can be achieved.
  • the object is further to propose a corresponding device, can be produced with the nozzle jet body assemblies efficiently or with high density between the individual bodies.
  • the advantage lies in the regulation of the angular position, which makes it possible for the outlet nozzles of two adjacent nozzle jet tools to interact in a targeted manner during the introduction of the injection medium into the soil.
  • the nozzle jets are preferably aligned against each other so that the pore water pressures of the individual jets add up, so that a base fracture of the soil occurs rather distant from the jet than when using only one jet or uncontrolled rotating jets. It can thus with a comparable center distance of the jet tools with the
  • a higher degree of coverage of the column body can be achieved, or it can be set with a comparable degree of coverage of the column body to be produced, a greater distance of the jet stream tools.
  • adjusting and regulating the depth of two adjacent jet tools is such that, in a given depth position, a cutting jet of the first jet tool inserted into the ground has an at least partial overlap with a cutting jet of the second jet tool inserted into the ground in the longitudinal direction of the tool.
  • a maximum axial offset of the two opposite outlet nozzles there is still a partial overlapping and mixing of the injection medium injected by the two jet-jet tools into the bottom between them. This offset can be up to one meter, depending on the depth of the holes.
  • the injection medium can be matched to the background conditions and the desired work result or selected accordingly.
  • injection means for example, liquids, water, suspensions, cement paste, chemical agents in the form of solutions and / or emulsions can be used.
  • a suspension of water and binder is used for the solidification of the substrate.
  • a binder in particular mortar, cement, Utrafeinzemente, silicate gels or plastic solutions in question.
  • the jet can be encased via an annular nozzle in addition with compressed air.
  • the binder hardens, two semi-columnar, columnar, or lamellar floor improvement bodies are created which have an overlapping cut area. But it is also the use of pure water as injection conceivable.
  • the apparatus may also comprise three, four or more jet guns which simultaneously inject grout into the soil.
  • Each of the jet nozzles comprises at least one outlet nozzle, wherein two, three or more outlet nozzles per tool can be provided.
  • the arrangement or distribution of the outlet nozzles is preferably identical for all jet-blasting tools. This ensures that when using a plurality of superposed outlet nozzles of a tool these can be brought into a depth position with corresponding outlet nozzles of the adjacent tool and interact with them.
  • the tools to be used can be selected according to the ground properties, geometric shape and required quality of the column body.
  • the jet tools may have one or more injector jets alone. In particular, small to medium-sized column diameters can be produced with this method, which is also referred to as a single direct method. It is also possible to use tools for dispensing air-coated injection or suspension jets for cutting and mortaring the soil. To increase the erosion performance and thus the range, the injectant jet is additionally encased with compressed air via an annular nozzle. This process, also referred to as double direct method, is used in particular for lamellar walls, underpinsings and sealing soles. According to another option, tools for dispensing an additional water jet can also be used.
  • This process also known as the triple separation process, erodes the soil with an air-quenched high-speed water jet.
  • the cement suspension is added at the same time via an additional nozzle below the water nozzle.
  • a variant of the method can also work without air jacket.
  • Crucial in the use of the last method is that two identical tools are used, so that both the suspension jets and the water jets of the two tools are in each matching depths.
  • the injection agent is introduced into the soil while controlling the depth and the angular position of a first of the at least two jet tools depending on the depth and the angular position of a second of the at least two jet tools.
  • the method for regulating the depths of the two jet nozzles or the outlet nozzles preferably comprises the steps of: detecting a first depth size representing the depth position of the first jet tool by means of a first depth gauge; Detecting a second depth size representing the depth position of the second jet tool by means of a second depth gauge; Comparing the first and second depth sizes; and adjusting the drawing speed of the first jet tool to the drawing speed of the second jet tool.
  • the regulation of the angular position can preferably take place by the following method steps: detecting a first angular quantity representing the angular position of the first jet-jet tool by means of a first angle-detecting device; Detecting a second angular quantity representing the angular position of the second jet tool by means of a second angle detection device; Comparing the first and second angular sizes; and adjusting the angular position of the first jet tool to the angular position of the second jet tool.
  • the depth or the angular position of a tool can be quickly tracked in occurring deviation from the depth or angular position of the other tool.
  • the nozzle jets face each other simultaneously when passing through a full revolution (360 °) in a certain angular range, so that the pore water pressures of the individual jets add up and the injection medium can penetrate deeper into the soil.
  • the method can be used as needed for the production of any cubes.
  • the jet nozzles are continuously rotated about their respective axis of rotation.
  • semi-columnar bodies can be created by pivoting the jet tools about their axis of rotation during drilling or pulling.
  • Slats can be produced by partial introduction of injection medium or suspension by means of the jet-jet tool at different depths.
  • the first jet tool and the second jet tool are driven so that they rotate at the same angular speed and / or that they are driven synchronously and / or that the first jet tool and the second jet tool are driven so that they turn in opposite directions of rotation.
  • the ejection of the injection medium is preferably carried out by drawing the nozzle jet tools so that columnar cubatures are produced, or stepwise so that column sections are produced, or even only in a depth position in a predetermined grid, to produce a sealing sole. During the drawing, the depths and the angular positions of the at least two jet nozzles are continuously detected and controlled.
  • the control of the angular position of the at least two jet tools is such that the outlet nozzle of the first jet tool and the outlet nozzle of the second jet nozzle viewed in a cross-sectional plane through the tools, at least about mirror symmetry in each rotational position during the injection of injection agent into the ground are aligned to a running between the two tools center plane.
  • the rotational movement of the first jet tool may be defined by a first phase angle ( ⁇ 1) over time (t) and the rotational movement of the second jet tool may be defined by a second phase angle ( ⁇ 2) over time (t).
  • the angular position of the at least two jet guns is controlled such that the sine of the first and second phase angles ( ⁇ 1, ( ⁇ 2) is in phase (phase offset of 0 °) and the cosine of the first and second phase angles ( ⁇ 1, ( ⁇ 2) is a phase offset of
  • a tolerance-related offset for the sine and the cosine deviating from these phases is preferably within a range of at most ⁇ 10 °, in particular at most ⁇ 5 °, or even at most ⁇ 2.5 °.
  • the solution of the above-mentioned object further consists in an apparatus for the production of floor elements, comprising: at least two nozzle jet tools, which are rotationally drivable by a drive unit; each jet tool a depth gauge for determining the depth of the jet tool; each nozzle jet tool an angle detection device for determining an angular size representing the angular position of the jet tool; and an actuator, with the depth and angular position of at least one of the two jet tools being adjustable such that an exit nozzle of the first jet tool and an exit nozzle of the second jet tool are at least approximately in a plane perpendicular to the axes of rotation of the jet tools and simultaneously to one between the two Jet jet tools are directed lying floor area.
  • the device advantageously allows a targeted interaction of the nozzle jets of the two adjacent tools in a floor area, so that in this area a stronger water saturation and thus a higher erosion performance is given.
  • a control unit which independently regulates the depth and the angular position of a first jet tool in dependence on the depth and the angular position of a second of the at least two jet guns.
  • a single drive unit is provided for rotationally driving the at least two jet stream tools.
  • a distributor unit is arranged in the drive train between the drive unit and the at least two nozzle jet tools, which distributes an initiated drive torque to the at least two nozzle jet tools and which can drive at least two nozzle jet rods or tools in opposite directions of rotation.
  • This provides a simple and inexpensive solution for driving both jet stream tools. It is particularly favorable if the setting unit is arranged in the drive train between the drive unit and the at least two jet-jet tools, with which the angular position of at least one of the jet-jet tools can be individually changed.
  • the detection of the angular position of the two jet stream tools by means of a corresponding angle detection device.
  • This can have a rotation angle sensor per jet tool, which cooperates with a magnet on the other jet tool.
  • the magnet generates a magnetic moment perpendicular to the longitudinal axis of the tool, which is detected by the rotation angle sensor of the parallel jet tool.
  • the rotation angle sensor has a receiver which can detect three time-dependent magnetic field components Hx (t), Hy (t) and Hz (t).
  • the Figures 1 and 2 which will be described together below, 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.
  • Attached to the drilling apparatus 2 is a Gurklermast 4, which vertically movable support means 5 for supporting two nozzle beam linkages 6, 7 for each jet nozzle 8, 9.
  • the jet tools 8, 9 each include one or more outlet nozzles 15, 16 via an injection means, as a suspension, and / or water and / or compressed air can be discharged through the nozzle jet linkage 6, 7 in the upcoming soil, and a drill bit 12, 13 which is arranged at the end of the respective jet beam linkage 6, 7.
  • the jet nozzles 8, 9 are each guided by a through-boring turret 23, by means of which the respective nozzle jet linkage 6, 7 about a rotational axis A1, A2 is rotationally driven.
  • the jet nozzles 8, 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 6, 7 are 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 nozzle beam linkage 6, 7.
  • the flushing head 22, which is also referred to as a swivel, is used to connect lines for introducing suspension or water, possibly also air, the lines are not shown.
  • the respective rotary head 14 is lowered with the nozzle jet linkage 6, 7.
  • nozzle beam linkages 6, 7 provided with rotary actuators 14 for corresponding jet tools 8, 9.
  • the two jet stream tools 8, 9 are lowered together via the respective drill pipes 6, 7 and the associated rotary drives 14 in order to call off two boreholes 20, 21 which are parallel to one another.
  • the advantage of the present device 11 with two nozzle jet tools 8, 9 is that two bottom bodies 29, 30 can be produced simultaneously.
  • FIG. 1 shows the drill 2 in the starting position. It can be seen that the bottom layers 26, 27 below the railing top edge 3 have a different nature.
  • the condition is such that the upper bottom layer 26 is softer and should be improved by the addition of a binder, such as cement or Betonit, by means of jet-blasting.
  • the underlying lower soil layer 27 is a load-bearing or water-impermeable bottom, which is to serve as a lower edge for the soil element to be created.
  • the two juxtaposed jet stream tools 8, 9 are respectively sunk by their respective axis A1, A2 through the upper bottom layer 26, namely up to the intended final depth T, in the present case approximately through the boundary the adjacent layers 26, 27 is defined.
  • two bottom bodies 29, 30 are produced simultaneously by means of the jet nozzles 8, 9. This second process step is in FIG. 2 shown.
  • the production of the two bottom bodies 29, 30, which may also be referred to as jet blasting bodies or cubatures, are accomplished by pulling the jet blasting tools 8, 9 upwards while rotating, or using one or more nozzles 15, 16 water or suspension escapes under high pressure and erodes the pending soil.
  • FIG. 2 are schematically the nozzle jets S1, S2 and lower parts of the already produced cubature recognizable.
  • This consists of two mutually centrally intersecting column bodies 29, 30. The process is carried out from bottom to top through the upper bottom layer 26, starting from a lying slightly below the depth T depth until reaching the desired height of the jet body 29, 30th After the preparation of the jet body 29, 30 are in the subsequent step, which is not shown separately, the nozzle jet tools 6, 7 pulled upwards.
  • the peculiarity of the present method and the device is that in addition to the adjustment and control of the depth of the nozzle jet tools 8, 9 and the outlet nozzles 15, 16 and a regulation of the angular position of the jet tools is done, in such a way that the outlet nozzle 15 of the a nozzle jet tool 8 and the outlet nozzle 16 of the other jet tool 9 are simultaneously directed to a lying between these area of the soil.
  • This adjustment or regulation of the angular positions of the jet nozzles 8, 9 is in the FIGS. 3a to 3d which will be described together below.
  • the two nozzle jet tools 8, 9 are brought at least approximately into an angular position, such that the radial orientation of the outlet nozzle 15 of one nozzle jet tool 8 with respect to a center plane EM lying between the two tools is mirror-symmetrical to the radial orientation of the outlet nozzle 16 the other nozzle jet tool 9 is located.
  • the outlet nozzles 15, 16 are at least approximately in a plane perpendicular to the nozzle jet tools 8, 9 level ED.
  • the two outlet nozzles 15, 16 are aligned in the same direction.
  • the drive of the two jet stream tools 8, 9 takes place synchronously with the same angular velocity. In this case, the two jet stream tools are driven in opposite directions of rotation, that is, one of the two tools is rotated in the one and the other counterclockwise.
  • the angular position of the two jet-blasting tools 8, 9 is continuously controlled so as to ensure that the jet streams S1, S2 are simultaneously directed to the ground between the two tools and in the injection means, such as a suspension or water.
  • the rotational movement of the first jet tool can be defined by a first phase angle ⁇ 1 over time t and the rotational movement of the second jet tool can be defined by a second phase angle ⁇ 2 over time t.
  • the angular position of the jet nozzles 8, 9 is controlled so that the sine of the first and second phase angles ⁇ 1, ⁇ 2 is in phase and the cosine of the first and second phase angles ⁇ 1, ⁇ 2 has a phase offset of 180 °.
  • a tolerance-related offset for the sine and the cosine deviating from these phases is preferably within a range of at most ⁇ 10 °, in particular at most ⁇ 5 °, or even at most ⁇ 2.5 °.
  • FIG. 3a shows the outlet nozzles 15, 16 and the nozzle jets S1, S2 of the first and second jet tool 8, 9, which are rotated from a starting position (0 °) by a phase angle ⁇ 1, ⁇ 2 of magnitude about 115 °. Furthermore, the radius R1, R2 of the nozzle jets S1, S2 can be seen. Radially outside the jet zone ZS detected by the jet front, whose boundary is represented by the radius R, there is an adjacent water saturation zone. The water contained in the water saturation zone can be contained in the soil from the outset, for example, by a layer below the groundwater level, or it is introduced by the jet itself into the soil. In the latter case, the water saturation zone precedes the nozzle jet or the nozzle jet front.
  • both jet streams S1, S2 jointly act on the ground area 24 lying outside the jet zone ZS in the region of the center plane EM.
  • this floor area 24 which in FIG. 3a hatched, the pore water overpressures of the two jet streams S1 and S2 add up, since these act simultaneously, which leads to a particularly high erosion performance.
  • the erosion effects associated with pore water overpressures in the water saturation zone will be discussed in greater detail below.
  • FIG. 3b are the outlet nozzles 15, 16 and the nozzle jets S1, S2 of the first and second jet tool 8, 9 further rotated, by a phase angle ⁇ 1, ⁇ 2 of about 155 ° from the starting position (0 °).
  • the two jet streams S1, S2 lie approximately in a plane defined by the longitudinal axes of the tools plane EW.
  • the two cutting beams S1, S2 of the two jet nozzles 8, 9 meet each other; It comes to the so-called "bullet" through the soil between the two rays, and to the connection of the two cubatures together to a cubature.
  • Figure 3c shows the nozzle jet tools in a further rotated position in which the two jet streams S1, S2 just meet to produce a common cubature in the center plane EM.
  • the tools or the nozzle jets S1, S2 are rotated by phase angles ⁇ 1, ⁇ 2 of about 190 ° in absolute value, which corresponds to a rotation relative to the tool plane EW of about 210 °.
  • both jet streams S1, S2 act in the region of the center plane EM on the water saturation zone 25 which lies outside the jet zone ZS and which in Figure 3c hatched.
  • the pore water overpressures add up due to the joint action of the two jet streams S1 and S2, which leads to a particularly high erosion performance.
  • the nozzle jet tools 8, 9 are shown schematically after again reaching the starting position of the nozzle jets S1, S2, that is, after exactly one complete revolution (360 °). It can be seen the two cubatures 29, 30, which are connected to one another in the region of the median plane EM with the formation of constrictions 28 to one another. These constrictions 28 in the transition region of the two cubatures are also referred to as gussets.
  • the inventive method or device with synchronously rotating in a common depth and oppositely directed outlet nozzles 15, 16 is achieved in an advantageous manner that the constrictions 28 are particularly small or that the connection area between the two cubatures 29, 30 is particularly large.
  • FIGS. 4a, 4b, 5a and 5b The preferred control steps for carrying out the method are shown in FIGS. 4a, 4b, 5a and 5b and are described below.
  • step V1 the depths of the two jet tools 8, 9 are first determined in step V1, which can be done by measuring the insertion of the linkage 6, 7. Subsequently, the determined depth of the two jet stream tools 8, 9 are compared with each other (step V2). If the two nozzle jet tools 8, 9 or the outlet nozzles 15, 16, taking into account tolerances of up to a maximum of one meter, are at the same depth (step V3: position equal), the release for the production of the cubatures takes place in step V4. If, however, it is determined that the tools are not at a depth (step V5: position different), the lower nozzle jet linkage in step V6 is subtracted by the determined difference, and the depth position is determined again (step V1).
  • FIG. 4b The regulation of the depth position during the production of a cubature is in FIG. 4b shown. This takes place analogously to the depth control before the start of production, so that with regard to the common steps to the above description FIG. 4a Reference is made.
  • the same steps are provided with the same reference numerals as in FIG. 4a ,
  • One difference is that when a different position is detected (step V5) in the subsequent method step V6 ', an adjustment of the drawing speeds of the two jet-blasting tools is carried out. This can be done, as shown, by reducing the pull rate of the higher boom for a certain period of time, but also by increasing the pull rate of the lower boom.
  • FIG. 5a is shown a flow chart for the alignment of the jets before production of the cubature. This is similar to the setting of the depth before the start of production, so in this regard to the description figure 4a Reference is made.
  • step V1 the angular positions of the two jet tools are first determined in step V1, which can be done by appropriate markings on the linkage or angular position sensors. Subsequently, the determined angular positions of the two jet stream tools are compared with each other (step V2).
  • step V3 position OK
  • step V5 alignment not OK
  • step V6 orientation not OK
  • FIG. 5b The regulation of the angular position during the production of a cubature is in FIG. 5b shown. This takes place analogously to the angle adjustment before production, so that reference is made to the above description with regard to the common steps.
  • the same or corresponding steps are provided with the same reference numerals, as in FIG. 5a ,
  • One difference is that upon detection of a different angular position (step V5) in the subsequent method step V6, an adjustment of the rotational speeds of the two jet stream tools is carried out. This can, as shown, by reducing the rotational speed of the leading tool for a certain period of time, but also by increasing the rotational speed of the trailing tool.
  • the nozzle jet process begins only when both a matching depth (loop according to FIG. 4a ) as well as the desired angular position (loop according to FIG. 5a ) of the two jet tools abuts.
  • the regulation of the depth and angular position during the production of the cubature, that is during the introduction of the injection agent in the soil, is carried out continuously over time or at defined intervals until reaching the desired end position.
  • the nozzle jet S of a nozzle jet tool is shown schematically as an arrow, wherein the arrowhead represents the nozzle jet front or the radius to which the injection medium penetrates into the soil. Adjacent thereto radially outside is a water-saturated zone, which is in direct communication with the jet.
  • the pressure level of the water contained in the pores between individual grains extends from a maximum value directly at the nozzle jet front to about zero at the edge between the water saturation zone and the upcoming dry soil. This pore water pressure in the water saturation zone is therefore higher, the smaller the distance to the jet S is.
  • FIG. 6 shows qualitatively the course of the pore water pressure P at a nozzle jet S over the distance A to the nozzle jet front.
  • the distance A to the nozzle jet front is plotted on the X axis, while the Y axis indicates the pore water overpressure P.
  • the pore water pressures P1, P2 of the nozzle jets S1, S2 facing each other are added, so that an erosion of the ground is rather distant from the respective jet S1, S2 occurs, as when using only one jet or time-shifted action of two jets.
  • FIG. 7 qualitatively shows the course of the pore water overpressure P (Y axis) over the distance A to the nozzle jet front (X axis).
  • a nozzle jet S1 acting from the left is shown schematically with a first arrow, a nozzle jet S2 acting from the right with a second arrow.
  • a first solid curve shows the pore water pressure P1 (A) caused by the first jet S1.
  • a second solid curve shows the pore water pressure P2 (A), which is caused by the oppositely directed second jet S2.
  • the pore water pressures P1 (A), P2 (A) in the soil add up to a resulting pore water pressure Pges (A), which is shown by a dashed line.
  • the two jet streams S1, S2 are directed exactly opposite. It is understood, however, that these can also run at an angle to each other.
  • the two jet streams S1, S2 do not have to touch each other directly to achieve a higher separation efficiency. Rather, the addition of the pore water overpressures P1, P2 in the area adjoining the nozzle jet zone bottom area here causes an increased soil discharge by reducing the shear strength between the soil grains. This effect occurs by the method or device according to the invention, in particular in the so-called gusset area between two full columns simultaneously produced in overcut.
  • the gusset area is the area of constriction between the two overlapping bodies.
  • FIG. 8 shows an example of a jet stream grid for a produced from individual cubes seal bottom of a pit.

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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 de dépôts au moyen d'un dispositif (11) comprenant au moins deux outils à jet (8, 9) comprenant les étapes de procédé :
    de forage et réglage de la profondeur (T) des aux moins deux outils à jet (8, 9) de telle sorte qu'une buse de sortie (15) d'un premier outil à jet (8) et une buse de sortie (16) d'un second outil à jet (9) reposent au moins environ dans un plan (ED) perpendiculaire aux axes longitudinaux (A1, A2) des outils à jet (8, 9),
    de rotation des au moins deux outils à jet (8, 9) sur leur axe longitudinal (A1, A2) respectif pour introduire un moyen d'injection dans le sol, sachant que la position angulaire (ϕ1, ϕ2) d'au moins un des outils à jet (8, 9) est ainsi réglée que la buse de sortie (15) du premier outil à jet (8) et la buse de sortie (16) du second outil à jet (9) sont dirigées simultanément sur une zone du sol placée entre les deux outils à jet (8, 9).
  2. Procédé selon la revendication 1, caractérisé en ce qu'un moyen d'injection est introduit dans le sol en réglant la profondeur et la position angulaire d'un premier outil à jet (8, 9) en fonction de la profondeur (T) et de la position angulaire (ϕ) d'un second outil à jet (9, 8).
  3. Procédé selon la revendication 1 ou 2, caractérisé en ce que sont prévus en tant qu'étapes de procédé supplémentaires :
    le retrait des au moins deux outils à jet (8, 9) du sol par introduction de moyens d'injection dans le sol, sachant que la profondeur (T) et la position angulaire (ϕ) des aux moins deux outils à jet (8, 9) sont détectées et réglées lors du retrait.
  4. Procédé selon l'une des revendications 1 à 3, caractérisé par
    le réglage de la profondeur (T) des aux moins deux outils à jet (8, 9) de telle sorte que dans une position de profondeur prédéfinie du premier, respectivement, du second outil à jet (8, 9), un jet de coupe (S1, S2) du premier outil à jet (8, 9) dans le sens longitudinal de l'outil à jet introduit dans le sol recouvre au moins partiellement un jet de coupe (S2, S1) introduit dans le sol, du second outil à jet (9, 8).
  5. Procédé selon l'une des revendications 1 à 4, caractérisé par
    le réglage de la position angulaire (ϕ) des aux moins deux outils à jet (8, 9) de telle sorte que la buse de sortie (15) du premier outil à jet (8) et la buse de sortie (16) du second outil à jet (9), vu dans un plan en coupe à travers les outils à jet (8, 9), sont alignées au moins environ en symétrie de miroir par rapport à un plan médian (EM) passant entre les deux axes longitudinaux (A1, A2) dans chaque position de rotation pendant l'introduction de moyens d'injection dans le sol.
  6. Procédé selon l'une des revendications 1 à 5, caractérisé en ce que
    le mouvement de rotation du premier outil à jet (8) est défini par un premier angle de phase (ϕ1) sur la durée (t) et le mouvement de rotation du second outil à jet (9) est défini par un second angle de phase (ϕ2) sur la durée (t),
    sachant que la position angulaire (ϕ) des aux moins deux outils à jet (8, 9) est ainsi réglée que le sinus des premier et second angles de phase (ϕ1, ϕ2) présente un décalage de phase de 0° +/- 10° et le cosinus des premier et second angles de phase (ϕ1, ϕ2) présente un décalage de phase de 180° +/- 10°.
  7. Procédé selon l'une des revendications 1 à 6, caractérisé en ce que les premier et second outils à jet (8, 9) sont ainsi entraînés qu'ils tournent à la même vitesse angulaire.
  8. Procédé selon l'une des revendications 1 à 7, caractérisé en ce que les premier et second outils à jet (8, 9) sont ainsi entraînés qu'ils tournent dans des sens de rotation opposés.
  9. Procédé selon l'une des revendications 1 à 8, caractérisé en ce que les premier et second outils à jet (8, 9) sont entraînés de façon synchrone.
  10. Procédé selon l'une des revendications 1 à 9, caractérisé en ce qu'en tant qu'étapes de procédé supplémentaire sont prévues :
    la détection d'une première grandeur de profondeur représentant la profondeur (T1) du premier outil à jet (8) au moyen d'un premier dispositif de mesure de profondeur,
    la détection d'une seconde grandeur de profondeur représentant la profondeur (T2) du second outil à jet (9) au moyen d'un second dispositif de mesure de profondeur ,
    la comparaison des première et seconde grandeurs de profondeur,
    l'adaptation de la vitesse de forage et réglage du premier outil à jet (8, 9) à la vitesse de forage et de retrait du second outil à jet (9, 8).
  11. Procédé selon l'une des revendications 1 à 10, caractérisé en ce qu'en tant qu'étapes de procédé supplémentaire sont prévues :
    la détection d'une première grandeur d'angle représentant la position angulaire (ϕ1) du premier outil à jet (8) au moyen d'un premier dispositif de détection angulaire,
    la détection d'une seconde grandeur d'angle représentant la position angulaire (ϕ2) du second outil à jet (9) au moyen d'un second dispositif de détection angulaire,
    la comparaison des première et seconde grandeurs d'angle,
    l'adaptation de la position angulaire (ϕ1) du premier outil à jet (8) à la position angulaire (ϕ2) du second outil à jet (9).
  12. Dispositif de fabrication de dépôts, comprenant :
    un premier outil à jet (8) et un second outil à jet (9) qui peuvent être entraînés en rotation par au moins une unité d'entraînement (14) ;
    un dispositif de mesure de la profondeur par outil à jet (8, 9) pour calculer la profondeur de l'outil à jet,
    un dispositif de détection d'angle par outil à jet (8, 9) pour calculer une grandeur d'angle représentant la position angulaire de l'outil à jet,
    une unité de réglage avec laquelle la profondeur (T1, T2) et la position angulaire (ϕ1, ϕ2) d'au moins un des deux outils à jet (8, 9) sont ainsi réglables qu'une buse de sortie (15) du premier outil à jet (8) et une buse de sortie (16) du second outil à jet (9) reposent au moins dans un plan (ED) perpendiculaire aux axes de rotation (A1, A2) des outils à jet (8, 9) et sont alignées simultanément sur un sol reposant entre les deux outils à jet (8, 9).
  13. Dispositif selon la revendication 12, caractérisé en ce qu'une unité de réglage est prévue qui est ainsi conçue que la profondeur (T1) et la position angulaire (ϕ1) du premier outil à jet (8) est réglable en fonction de la profondeur (T2) et de la position angulaire (ϕ2) du second outil à jet (9).
  14. Dispositif selon la revendication 12 ou 13, caractérisé en ce qu'au moins une unité d'entraînement (14) est prévue pour l'entraînement en rotation des deux outils à jet (8, 9),
    sachant que dans la chaîne d'entraînement entre l'unité d'entraînement (14) et les outils à jet (8, 9), une unité distributrice est disposée qui distribue un couple d'entraînement introduit aux au moins deux outils à jet (8, 9) et entraîne les deux outils à jet (8, 9) dans des sens de rotation opposés.
  15. Dispositif selon l'une des revendications 12 à 14, caractérisé en ce que l'unité de réglage pour régler la position angulaire d'au moins un des outils à jet (8, 9) est disposée dans la chaîne d'entraînement entre l'unité d'entraînement (14) et les outils à jet.
EP12190925.3A 2012-10-31 2012-10-31 Procédé et dispositif de fabrication de dépôts parallèles au moyen d'outils à jet Active EP2730702B1 (fr)

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JP6391876B1 (ja) * 2018-04-06 2018-09-19 小野田ケミコ株式会社 地盤改良方法

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US5589775A (en) 1993-11-22 1996-12-31 Vector Magnetics, Inc. Rotating magnet for distance and direction measurements from a first borehole to a second borehole
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
DE10225518B4 (de) 2002-06-10 2004-07-08 Rayonex Schwingungstechnik Gmbh Verfahren und Vorrichtung zur Steuerung und Positionsbestimmung eines Instruments oder Gerätes
KR20050037911A (ko) 2003-10-20 2005-04-25 한미기초개발주식회사 다중 고압분사 압밀 다짐 그라우팅 공법 및 장치

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