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EP1746213A1 - Device for making a trenchwall by soil mixing - Google Patents

Device for making a trenchwall by soil mixing Download PDF

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Publication number
EP1746213A1
EP1746213A1 EP06116711A EP06116711A EP1746213A1 EP 1746213 A1 EP1746213 A1 EP 1746213A1 EP 06116711 A EP06116711 A EP 06116711A EP 06116711 A EP06116711 A EP 06116711A EP 1746213 A1 EP1746213 A1 EP 1746213A1
Authority
EP
European Patent Office
Prior art keywords
head
kelly
drilling
mixing
trajectory
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.)
Withdrawn
Application number
EP06116711A
Other languages
German (de)
French (fr)
Inventor
Philippe Chagnot
Daniel Perpezat
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.)
Soletanche Freyssinet SA
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 EP1746213A1 publication Critical patent/EP1746213A1/en
Withdrawn legal-status Critical Current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
    • E02D17/00—Excavations; Bordering of excavations; Making embankments
    • E02D17/13—Foundation slots or slits; Implements for making these slots or slits
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/18—Dredgers; Soil-shifting machines mechanically-driven with digging wheels turning round an axis, e.g. bucket-type wheels
    • E02F3/20—Dredgers; Soil-shifting machines mechanically-driven with digging wheels turning round an axis, e.g. bucket-type wheels with tools that only loosen the material, i.e. mill-type wheels
    • E02F3/205—Dredgers; Soil-shifting machines mechanically-driven with digging wheels turning round an axis, e.g. bucket-type wheels with tools that only loosen the material, i.e. mill-type wheels with a pair of digging wheels, e.g. slotting machines
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02F—DREDGING; SOIL-SHIFTING
    • E02F3/00—Dredgers; Soil-shifting machines
    • E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
    • E02F3/18—Dredgers; Soil-shifting machines mechanically-driven with digging wheels turning round an axis, e.g. bucket-type wheels
    • E02F3/22—Component parts
    • E02F3/26—Safety or control devices

Definitions

  • the subject of the present invention is an installation for making a buried wall by mixing the ground with a binder allowing a correction of trajectory and a method for correcting the trajectory of the drill head of such an installation.
  • diaphragm walls which consists, using a drilling machine such as a hydrofraise, to achieve successively in the ground trench portions and to fill the trench thus produced with a cement or a concrete .
  • This technique which consists of mixing the cut soil to make the trench with the binder is known as the Anglo-Saxon soil mixing.
  • the installation 10 comprises a mobile frame 12 on which is mounted a vertical guide mast 14.
  • a translational movement head 16 can slide along the vertical mast 14 to drive in turn, in the vertical direction, a guide beam 18.
  • a guide beam is commonly called “kelly” by those skilled in the art. It is therefore this term that will be used in the rest of the text.
  • a drilling and mixing head 20 At the lower end 18a of the kelly 18 is mounted a drilling and mixing head 20 of the type known per se.
  • the drill head 20 is rigidly attached to the lower end 18a of the kelly 18 and essentially consists of two sets of rotating tools 22 and 24 rotating about horizontal parallel axes when using the machine. These rotary tools allow both the cutting of the soil to make the trench corresponding to the wall to be made and the mixture of the binder or cement with the ground thus cut.
  • the binder or cement is injected through a tubing 26 which passes through the kelly 18.
  • the kelly 18 transmits to the drilling and mixing head 20 the thrust exerted by the displacement head 16 guided by the mast. Being guided along a mast placed in a vertical position thanks to a certain rigidity, the kelly participates in driving the tool along a vertical axis.
  • a certain rigidity of torsion makes it possible to resist risks of twisting of the kelly and thus of the drilling and mixing head.
  • the assembly on kelly allows a correction of the deviations in the direction perpendicular to the common axis of rotation of the rotary tools by adjusting differential speeds between the right and left motors controlling the rotary tools.
  • this arrangement does not make it possible to correct deviations corresponding to a kinking or a deflection in the direction of the axes of rotation of the rotary tools.
  • a first object of the invention is to provide an installation for producing a buried wall by mixing soil / binder that allows trajectory corrections along the three axes of orthogonal coordinates.
  • the installation is characterized in that it further comprises controllable mechanical means mounted at the lower end of said kelly to cause an angulation relative to the vertical of said drilling and mixing head at least about an axis substantially orthogonal to said direction YY ', whereby the trajectory of the drilling and mixing head can be corrected.
  • controllable mechanical means comprise means forming a pivot axis between the lower end of the kelly and said drilling and mixing head extending in a direction XX 'substantially orthogonal to the direction YY and means for controlling the pivoting of said head about said axis.
  • the drilling and mixing head comprises two distinct parts juxtaposed and each mounted on said pivot axis, each part comprising a rotary tool, the axes of the rotary tools being parallel to each other when the two parts of the drilling and mixing head are aligned, and each part having its own pivot control means.
  • said drilling and mixing head is rigidly fixed to the lower end of the kelly and the controllable mechanical means comprise two substantially identical flaps mounted on either side of the lower end of the kelly. to be able to pivot about a common geometric axis substantially orthogonal to said direction YY ', and control means of said flaps about said common axis.
  • the two flaps symmetrically mounted on the lower end of the kelly will, by a dynamic action, allow, thanks to their controlled orientation, to obtain a deviation of the lower end of the kelly by a certain bending thereof and thus the drilling and mixing head.
  • each drilling tool is constituted by two coaxial cutters 22a and 22b arranged from and the other of the plate 32.
  • the elements such as 34 mounted on the strawberries have a suitable shape for carrying out both the cutting of the soil and the mixing of the soil with the binder.
  • the fixing plate 30 of the head 20 is connected to the lower end 18a of the kelly 18 by a pivoting system 36.
  • the pivoting system essentially consists of an axis 38 which extends along the direction XX 'orthogonal to the general direction of the kelly and the axes YY' of rotation of the rotary tools.
  • the shaft 38 is mounted in bearings carried respectively by lugs 40 extending the lower end 18a of the kelly and by non-visible bearings integral with the fixing plate 30.
  • the pivoting system 36 also comprises means for rotating the head 20 with respect to the end 18a of the kelly around the axis 38.
  • these control means are constituted by two jacks 42 and 44, one of which end is articulated on the attachment plate 30 of the head 20 and the other end is articulated on the lower end of the kelly 18.
  • the cylinders 42 and 44 By controlling the cylinders 42 and 44, it is thus possible to control the angulation of the head 20 relative to the vertical axis XX 'defined by the axis 38.
  • the cylinders are hydraulic and their control system is disposed at the lower end of the kelly 18.
  • the drilling and mixing head which bears the reference 20 'is constituted by two distinct parts 110 and 112.
  • Each part comprises a half-plate 32a, 32b symmetrical and independent of one another.
  • On each half-plate 32a, 32b are mounted two drilling tools 22a, 22b respectively constituting the drilling tools 22 and 24.
  • each half-plate 32a, 32b is pivotally mounted about the pivot axis 38 mounted at the lower end of the kelly 18.
  • Each half-plate 32a, 32b is secured to one end of one of the cylinders 42 and 44. Cylinders 42 and 44 can be ordered separately. It is thus possible to give the two drilling tools 22 and 24 angulations that are opposite to the longitudinal direction of the kelly 18. This configuration makes it possible to correct kelly twist.
  • the drilling and mixing head 20 which is identical in all respects to that described in connection with FIGS. 2 and 3 is directly bolted by its fixing plate 30 to the lower end 18a.
  • kelly thus obtaining a connection as rigid as possible between the kelly 18 and the head 20.
  • the portion of the kelly near its lower end 18a, and more precisely in its zone 18b, is equipped with two identical flaps 50 and 52 which are pivotally mounted about a geometric axis xx 'which is orthogonal to the axes of rotation of the rotary tools 22 and 24.
  • FIG 8 there is shown in detail a first mounting mode of the flaps 50 and 52 on the portion 18b of the kelly.
  • the flaps 50 and 52 are integral with a common axis of rotation 54 which passes through the walls of the kelly by bearings 56 and 58.
  • the flaps 50 and 52 which, at rest, are vertical, are symmetrical with respect to the geometric axis xx 'defined by the axis of rotation 54.
  • Inside the kelly are provided means for controlling the rotation of the flaps 50 and 52.
  • These control means may consist of a motor, for example a hydraulic motor 60 of which output shaft drives a first gear 62 meshing with a second gear 64 integral with the pivot axis 54.
  • the two flaps 50 and 52 are the same pivot angle.
  • the motor 60 is controlled from the surface.
  • FIG. 9 shows a second method of mounting the flaps 50 and 52 on the portion 18b of the kelly, the flaps being identical to those shown in FIG. 6.
  • each flap is mounted on a half pivot shaft respectively 70 and 72 which passes through the wall of the kelly 18 by bearings 56 and 58.
  • Each rotating half-shaft 70 and 72 is driven by a specific motor 74 and 76 via a train gears 78 and 80.
  • flaps can be oriented independently, it is understood that these flaps not only make it possible to correct a trajectory error in the direction XX 'of the rotational axes of the rotary tools, but also of the trajectory errors due to kelly twisting, this twisting being corrected by giving different orientations to the shutters 50 and 52.
  • the flaps 50 and 52 act as a boat rudder or elevator of a "duck plane" plane in the non-solid material that fills the trench being excavated. So that properly oriented shutters can produce their deviation effect, especially given the density of the material that fills the trench, it is necessary that the flaps, that is to say the assembly consisting of the kelly and the head 20, have a certain speed.
  • FIG. 10a there is shown the trench 100 being drilled, the lower end 102 of the trench being deflected.
  • This figure also schematically shows the material 104 filling the trench and constituted by the mixture of cut soil and binder.
  • the kelly 18 / head assembly 20 is raised in the trench of sufficient height as shown in FIG. 8b.
  • the flaps 50 and 52 are suitably oriented to correct the deflection of the previously detected drill bit. After the correct orientation of the flaps, using the guide mast, it controls the descent of the kelly 18 / head 20 with a suitable controlled speed. If the length of the stroke and the linear speed of displacement of the kelly 18 are suitable, the flaps 50 and 52 play their role of deflecting the lower end of the kelly and thus of the head 20.

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  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Paleontology (AREA)
  • Earth Drilling (AREA)
  • Bulkheads Adapted To Foundation Construction (AREA)

Abstract

The installation has a translation displacement head sliding along a vertical mast for driving a kelly (18) along a vertical direction. A soil drilling and mixing head (20) is fixed to lower end of kelly, where the head (20) has rotating tools (22, 24) whose axles are parallel between them and parallel to horizontal direction. Flaps (50, 52) are mounted at end of the kelly for controlling angulation of the head (20) with respect to the vertical of the head (20) around an axis orthogonal to the direction. An independent claim is also included for a method of correcting trajectory of mixing and drilling head of a buried wall making installation.

Description

La présente invention a pour objet une installation de réalisation de paroi enterrée par mélange du sol avec un liant autorisant une correction de trajectoire et un procédé de correction de trajectoire de la tête de forage d'une telle installation.The subject of the present invention is an installation for making a buried wall by mixing the ground with a binder allowing a correction of trajectory and a method for correcting the trajectory of the drill head of such an installation.

Lorsque l'on veut réaliser des parois enterrées dans le sol, plusieurs techniques sont disponibles. La plus connue est celle des parois moulées qui consiste, à l'aide d'une machine de forage telle qu'une hydrofraise, à réaliser successivement dans le sol des portions de tranchée et à remplir la tranchée ainsi réalisée avec un ciment ou un béton.When one wants to make walls buried in the ground, several techniques are available. The best known is that of diaphragm walls which consists, using a drilling machine such as a hydrofraise, to achieve successively in the ground trench portions and to fill the trench thus produced with a cement or a concrete .

Pour diminuer le coût de la réalisation de la paroi enterrée, on a développé des techniques qui consistent à exécuter des panneaux successifs en mélangeant le sol découpé de la tranchée avec du ciment ou plus généralement avec un liant, le mélange sol/liant formant la paroi. Cette technique est particulièrement utilisée pour la réalisation de murs de soutènement ou d'écrans d'étanchéité.To reduce the cost of producing the buried wall, techniques have been developed which consist in executing successive panels by mixing the cut soil of the trench with cement or, more generally, with a binder, the soil / binder mixture forming the wall. . This technique is particularly used for the realization of retaining walls or sealing screens.

Cette technique qui consiste donc à mélanger le sol découpé pour réaliser la tranchée avec le liant est connue sous le vocable anglo-saxon de soil mixing.This technique which consists of mixing the cut soil to make the trench with the binder is known as the Anglo-Saxon soil mixing.

Plusieurs types d'installations ou de machines peuvent être utilisés pour réaliser ces parois enterrées par mélange du sol et d'un liant.Several types of installations or machines can be used to make these buried walls by mixing the soil and a binder.

Sur la figure 1 annexée, on a représenté une machine utilisable qui correspond à la présente invention.In Figure 1 attached, there is shown a usable machine that corresponds to the present invention.

L'installation 10 comprend un châssis mobile 12 sur lequel est monté un mât vertical de guidage 14. Une tête de déplacement en translation 16 peut coulisser le long du mât vertical 14 pour entraîner à son tour, selon la direction verticale, une poutre de guidage 18. Une telle poutre est couramment appelée "kelly" par l'homme de l'art. C'est donc ce terme qui sera utilisé dans la suite du texte. A l'extrémité inférieure 18a du kelly 18, est montée une tête de forage et de mélange 20 de type en soi connu. La tête de forage 20 est fixée de façon rigide à l'extrémité inférieure 18a du kelly 18 et elle est essentiellement constituée par deux ensembles d'outils rotatifs 22 et 24 tournant autour d'axes parallèles horizontaux lors de l'utilisation de la machine. Ces outils rotatifs permettent à la fois la découpe du sol pour réaliser la tranchée correspondant à la paroi à réaliser et le mélange du liant ou ciment avec le sol ainsi découpé. Le liant ou ciment est injecté par une tubulure 26 qui traverse le kelly 18.The installation 10 comprises a mobile frame 12 on which is mounted a vertical guide mast 14. A translational movement head 16 can slide along the vertical mast 14 to drive in turn, in the vertical direction, a guide beam 18. Such a beam is commonly called "kelly" by those skilled in the art. It is therefore this term that will be used in the rest of the text. At the lower end 18a of the kelly 18 is mounted a drilling and mixing head 20 of the type known per se. The drill head 20 is rigidly attached to the lower end 18a of the kelly 18 and essentially consists of two sets of rotating tools 22 and 24 rotating about horizontal parallel axes when using the machine. These rotary tools allow both the cutting of the soil to make the trench corresponding to the wall to be made and the mixture of the binder or cement with the ground thus cut. The binder or cement is injected through a tubing 26 which passes through the kelly 18.

Le kelly 18 transmet à la tête de forage et de mélange 20 la poussée exercée par la tête de déplacement 16 guidée par le mât. Etant guidé le long d'un mât placé dans une position verticale grâce à une certaine rigidité, le kelly participe à l'entraînement de l'outil selon un axe vertical. Une certaine rigidité de torsion permet de résister à des risques de vrillage du kelly et donc de la tête de forage et de mélange.The kelly 18 transmits to the drilling and mixing head 20 the thrust exerted by the displacement head 16 guided by the mast. Being guided along a mast placed in a vertical position thanks to a certain rigidity, the kelly participates in driving the tool along a vertical axis. A certain rigidity of torsion makes it possible to resist risks of twisting of the kelly and thus of the drilling and mixing head.

Il est compréhensible que, malgré ces rigidités, dans le cas de panneaux de profondeurs importantes, des efforts de flexion et/ou de torsion puissent faire dévier l'outil et donc entraîner une déviation de la paroi qui serait ainsi réalisée.It is understandable that, despite these rigidities, in the case of panels of large depths, bending and / or torsion forces may deflect the tool and thus cause a deflection of the wall that would be achieved.

Le montage sur kelly permet une rectification des déviations suivant la direction perpendiculaire à l'axe commun de rotation des outils rotatifs par réglage de vitesses différentielles entre les moteurs droit et gauche commandant les outils rotatifs. Cependant, ce montage ne permet pas de rectifier des déviations correspondant à un vrillage ou à une déviation suivant la direction des axes de rotation des outils rotatifs.The assembly on kelly allows a correction of the deviations in the direction perpendicular to the common axis of rotation of the rotary tools by adjusting differential speeds between the right and left motors controlling the rotary tools. However, this arrangement does not make it possible to correct deviations corresponding to a kinking or a deflection in the direction of the axes of rotation of the rotary tools.

Un premier objet de l'invention est de fournir une installation de réalisation de paroi enterrée par mélange sol/liant qui permette des corrections de trajectoire selon les trois axes de coordonnées orthogonales.A first object of the invention is to provide an installation for producing a buried wall by mixing soil / binder that allows trajectory corrections along the three axes of orthogonal coordinates.

Pour atteindre ce but, selon l'invention, l'installation de réalisation de paroi enterrée par mélange du sol avec un liant comprend :

  • un mât sensiblement vertical de guidage ;
  • un kelly guidé en translation le long dudit mât;
  • des moyens de déplacement vertical dudit kelly par rapport au mât ;
  • une tête de forage et de mélange du sol découpé avec un liant fixée à l'extrémité inférieure du kelly, ladite tête du forage et de mélange comportant deux outils rotatifs dont les axes sont parallèles entre eux et parallèles à une direction YY' sensiblement horizontale ; et
  • des moyens pour injecter un liant.
To achieve this object, according to the invention, the buried wall installation installation by mixing the soil with a binder comprises:
  • a substantially vertical guide mast;
  • a kelly guided in translation along said mast;
  • means for vertically moving said kelly relative to the mast;
  • a drill head and soil mixing cut with a binder attached to the lower end of the kelly, said head of the drilling and mixing comprising two rotary tools whose axes are parallel to each other and parallel to a substantially horizontal direction YY '; and
  • means for injecting a binder.

L'installation se caractérise en ce qu'elle comprend en outre des moyens mécaniques commandables montés à l'extrémité inférieure dudit kelly pour provoquer une angulation par rapport à la verticale de ladite tête de forage et de mélange au moins autour d'un axe sensiblement orthogonal à ladite direction YY', par quoi la trajectoire de la tête de forage et de mélange peut être corrigée.The installation is characterized in that it further comprises controllable mechanical means mounted at the lower end of said kelly to cause an angulation relative to the vertical of said drilling and mixing head at least about an axis substantially orthogonal to said direction YY ', whereby the trajectory of the drilling and mixing head can be corrected.

On comprend que, grâce au fait que l'extrémité inférieure du kelly est équipée de moyens mécaniques commandables pour provoquer une angulation de la tête de forage et de mélange par rapport à la verticale, on peut effectivement corriger d'éventuelles déviations de l'outil selon la direction des axes de rotation des outils rotatifs de la tête de forage.We understand that, thanks to the fact that the lower end of the kelly is equipped with controllable mechanical means to cause angulation of the drill head and mixing relative to the vertical, it can effectively correct any deviations from the tool according to the direction of the axes of rotation of the rotary tools of the drill head.

Selon un premier mode de mise en oeuvre, les moyens mécaniques commandables comprennent des moyens formant un axe de pivotement entre l'extrémité inférieure du kelly et ladite tête de forage et de mélange s'étendant selon une direction XX' sensiblement orthogonale à la direction YY' et des moyens de commande du pivotement de ladite tête autour dudit axe.According to a first embodiment, the controllable mechanical means comprise means forming a pivot axis between the lower end of the kelly and said drilling and mixing head extending in a direction XX 'substantially orthogonal to the direction YY and means for controlling the pivoting of said head about said axis.

Grâce à la présence de l'axe de pivotement entre l'extrémité inférieure du kelly et la partie supérieure de la tête de forage et de mélange d'une part, et aux moyens de commande de pivotement d'autre part, il est possible de donner à la tête une angulation par rapport au kelly qui permet une correction effective de la trajectoire.Thanks to the presence of the pivot axis between the lower end of the kelly and the upper part of the drilling and mixing head on the one hand, and the pivot control means on the other hand, it is possible to give the head angulation relative to the kelly which allows an effective correction of the trajectory.

Selon une variante du premier mode de mise en oeuvre, la tête de forage et de mélange comprend deux parties distinctes juxtaposées et montées chacune sur ledit axe de pivotement, chaque partie comprenant un outil rotatif, les axes des outils rotatifs étant parallèles entre eux lorsque les deux parties de la tête de forage et de mélange sont alignées, et chaque partie comportant ses propres moyens de commande de pivotement. Avec cette variante, il est possible de donner à chaque partie de la tête de forage et de mélange des inclinaisons inverses par rapport à la verticale. On peut ainsi corriger un vrillage du kelly.According to a variant of the first embodiment, the drilling and mixing head comprises two distinct parts juxtaposed and each mounted on said pivot axis, each part comprising a rotary tool, the axes of the rotary tools being parallel to each other when the two parts of the drilling and mixing head are aligned, and each part having its own pivot control means. With this variant, it is possible to give each part of the drilling and mixing head inclinations opposite to the vertical. It is thus possible to correct a twist of the kelly.

Selon un deuxième mode de mise en oeuvre, ladite tête de forage et de mélange est rigidement fixée à l'extrémité inférieure du kelly et les moyens mécaniques commandables comprennent deux volets sensiblement identiques montés de part et d'autre de l'extrémité inférieure du kelly pour pouvoir pivoter autour d'un axe géométrique commun sensiblement orthogonal à ladite direction YY', et des moyens de commande desdits volets autour dudit axe commun.According to a second embodiment, said drilling and mixing head is rigidly fixed to the lower end of the kelly and the controllable mechanical means comprise two substantially identical flaps mounted on either side of the lower end of the kelly. to be able to pivot about a common geometric axis substantially orthogonal to said direction YY ', and control means of said flaps about said common axis.

On comprend que dans ce deuxième mode de mise en oeuvre de l'invention, les deux volets montés symétriquement sur l'extrémité inférieure du kelly vont, par une action dynamique, permettre, grâce à leur orientation commandée, d'obtenir une déviation de l'extrémité inférieure du kelly par une certaine flexion de celui-ci et donc de la tête de forage et de mélange.It is understood that in this second embodiment of the invention, the two flaps symmetrically mounted on the lower end of the kelly will, by a dynamic action, allow, thanks to their controlled orientation, to obtain a deviation of the lower end of the kelly by a certain bending thereof and thus the drilling and mixing head.

Un deuxième objet de l'invention est de fournir un procédé de correction de trajectoire de la tête de forage et de mélange d'une installation selon le deuxième mode de réalisation, qui comprend les étapes suivantes :

  • on détecte une erreur de trajectoire de ladite tête de forage et de mélange par rapport à la verticale selon la direction YY', ladite tête étant à une profondeur déterminée ;
  • on remonte, à l'aide du kelly, ladite tête d'une hauteur prédéterminée ;
  • on commande le pivotement desdits volets autour dudit axe commun en fonction de la correction à apporter ; et
  • on provoque la descente de la tête et du kelly dans la tranchée, par quoi l'orientation angulaire desdits volets permet d'obtenir la correction de trajectoire.
A second object of the invention is to provide a method of correcting the trajectory of the drilling and mixing head of an installation according to the second embodiment, which comprises the following steps:
  • detecting a trajectory error of said drilling and mixing head relative to the vertical in the direction YY ', said head being at a determined depth;
  • using the kelly, said head is raised to a predetermined height;
  • the pivoting of said flaps around said common axis is controlled according to the correction to be made; and
  • it causes the descent of the head and the kelly in the trench, whereby the angular orientation of said flaps makes it possible to obtain the trajectory correction.

On comprend qu'ainsi, en orientant correctement les volets, on peut corriger une déviation selon la direction des axes de rotation des outils rotatifs de la tête de forage et de mélange du fait de l'effet dynamique des volets dans le milieu remplissant la tranche.It is thus understood that, by correctly orienting the flaps, it is possible to correct a deviation in the direction of the axes of rotation of the rotary tools of the drilling and mixing head because of the dynamic effect of the flaps in the medium filling the wafer. .

Un troisième objet de l'invention est de fournir un procédé de correction de trajectoire de la tête de forage et de mélange d'une installation selon le deuxième mode de mise en oeuvre, qui se caractérise en ce qu'il comprend les étapes suivantes :

  • on détecte une erreur de trajectoire de ladite tête de forage et de mélange correspondant à un vrillage autour de l'axe longitudinal du kelly ;
  • on remonte, à l'aide du kelly, ladite tête d'une hauteur prédéterminée ;
  • on commande séparément le pivotement de chacun desdits volets autour de l'axe commun en fonction de la correction de vrillage à apporter ; et
  • on provoque la descente de la tête et du kelly dans le forage, par quoi l'orientation angulaire desdits volets permet d'obtenir la correction de trajectoire.
A third object of the invention is to provide a method for correcting the trajectory of the drilling and mixing head of an installation according to the second embodiment, which is characterized in that it comprises the following steps:
  • detecting a trajectory error of said drilling and mixing head corresponding to a twisting around the longitudinal axis of the kelly;
  • using the kelly, said head is raised to a predetermined height;
  • the pivoting of each of said flaps around the common axis is separately controlled according to the twisting correction to be made; and
  • it causes the descent of the head and the kelly in the bore, whereby the angular orientation of said flaps makes it possible to obtain the trajectory correction.

On comprend que grâce à la commande distincte de l'orientation des deux volets, il est possible de corriger un effet de vrillage du kelly.It is understood that through the separate control of the orientation of the two components, it is possible to correct a twisting effect of the kelly.

Un quatrième objet de l'invention est de fournir un procédé de correction de trajectoire de la tête de forage et de mélange d'une installation selon le deuxième mode de mise en oeuvre, qui se caractérise en ce qu'il comprend les étapes suivantes :

  • on détecte une erreur de trajectoire de ladite tête de forage et de mélange ;
  • on commande le pivotement des volets en fonction de l'erreur de trajectoire détectée ; et
  • on provoque la remontée de ladite tête et du kelly avec une vitesse prédéterminée, par quoi on obtient une correction de la direction du forage.
A fourth object of the invention is to provide a method for correcting the trajectory of the drilling and mixing head of an installation according to the second embodiment, which is characterized in that it comprises the following steps:
  • detecting a trajectory error of said drilling and mixing head;
  • the flaps are controlled according to the detected path error; and
  • the said head and the kelly are raised with a predetermined speed, whereby a correction of the drilling direction is obtained.

D'autres caractéristiques et avantages de l'invention apparaîtront mieux à la lecture de la description qui suit de plusieurs modes de réalisation de l'invention donnés à titre d'exemples non limitatifs. La description se réfère aux figures annexées sur lesquelles :

  • la figure 1, déjà décrite, montre une installation connue de réalisation de paroi enterrée par mélange sol/liant du type à kelly ;
  • la figure 2 est une vue de la partie inférieure de l'installation montrant le montage de la tête de forage par rapport au kelly selon un premier mode de mise en oeuvre de l'invention ;
  • la figure 3 est une vue de côté de la partie inférieure de l'installation représentée sur la figure 2 ;
  • la figure 4 est une vue en perspective de la tête de forage et de mélange selon une variante du mode de réalisation des figures 2 et 3 ;
  • la figure 5 est une vue de côté de la variante de la figure 4, les deux outils rotatifs ayant des orientations différentes ;
  • la figure 6 est une vue en perspective de la partie inférieure de l'installation selon un deuxième mode de mise en oeuvre de l'invention ;
  • la figure 7 est une vue en élévation du mode de réalisation de la figure 6 ;
  • la figure 8 est une vue en coupe verticale partielle de l'extrémité inférieure du kelly montrant un premier mode de réalisation de la commande des volets du deuxième mode de réalisation ;
  • la figure 9 est une vue analogue à celle de la figure 8 montrant un deuxième mode de réalisation de la commande des volets ; et
  • les figures 10a à 10c montrent les différentes étapes du procédé d'utilisation de l'installation de forage et de mélange selon le deuxième mode de mise en oeuvre.
Other characteristics and advantages of the invention will appear better on reading the following description of several embodiments of the invention given as non-limiting examples. The description refers to the appended figures in which:
  • FIG. 1, already described, shows a known installation for producing a buried wall by means of a kelly-type sol / binder mixture;
  • Figure 2 is a view of the lower part of the installation showing the mounting of the drill head relative to the kelly according to a first embodiment of the invention;
  • Figure 3 is a side view of the lower part of the installation shown in Figure 2;
  • Figure 4 is a perspective view of the drilling and mixing head according to a variant of the embodiment of Figures 2 and 3;
  • Figure 5 is a side view of the variant of Figure 4, the two rotary tools having different orientations;
  • Figure 6 is a perspective view of the lower part of the installation according to a second embodiment of the invention;
  • Figure 7 is an elevational view of the embodiment of Figure 6;
  • Figure 8 is a partial vertical sectional view of the lower end of the kelly showing a first embodiment of the shutter control of the second embodiment;
  • Figure 9 is a view similar to that of Figure 8 showing a second embodiment of the flap control; and
  • Figures 10a to 10c show the different steps of the method of use of the drilling and mixing plant according to the second embodiment.

En se référant maintenant aux figures 2 et 3, on va décrire un premier mode de réalisation de l'installation.Referring now to Figures 2 and 3, a first embodiment of the installation will be described.

Sur ces figures, on a représenté l'extrémité inférieure 18a du kelly 18, ainsi que la tête de forage et de mélange 20. La tête de mélange et de forage comporte une plaque supérieure de fixation 30, et une plaque verticale 32 constituant le bâti principal de la tête 20, plaque sur laquelle sont montés les outils rotatifs de forage et de mélange 22 et 24. De préférence, comme le montre mieux la figure 3, chaque outil de forage est constitué par deux fraises coaxiales 22a et 22b disposées de part et d'autre de la plaque 32. Les éléments tels que 34 montés sur les fraises ont une forme convenable pour réaliser à la fois la découpe du sol et le mélange du sol avec le liant.In these figures, there is shown the lower end 18a of the kelly 18, and the drilling and mixing head 20. The mixing head and drilling comprises an upper fixing plate 30, and a vertical plate 32 constituting the frame main head 20, plate on which are mounted the rotary drilling and mixing tools 22 and 24. Preferably, as best shown in Figure 3, each drilling tool is constituted by two coaxial cutters 22a and 22b arranged from and the other of the plate 32. The elements such as 34 mounted on the strawberries have a suitable shape for carrying out both the cutting of the soil and the mixing of the soil with the binder.

Dans ce premier mode de réalisation, la plaque de fixation 30 de la tête 20 est reliée à l'extrémité inférieure 18a du kelly 18 par un système de pivotement 36. Le système de pivotement est essentiellement constitué par un axe 38 qui s'étend selon la direction XX' orthogonale à la direction générale du kelly et aux axes YY' de rotation des outils rotatifs. De façon connue, l'axe 38 est monté dans des paliers portés respectivement par des oreilles 40 prolongeant l'extrémité inférieure 18a du kelly et par des paliers non visibles solidaires de la plaque de fixation 30. Pour commander le pivotement de la tête 20 par rapport à l'extrémité inférieure du kelly, le système de pivotement 36 comporte également des organes de mise en rotation de la tête 20 par rapport à l'extrémité 18a du kelly autour de l'axe 38. Dans le mode de réalisation considéré, ces moyens de commande sont constitués par deux vérins 42 et 44, dont une extrémité est articulée sur la plaque de fixation 30 de la tête 20 et dont l'autre extrémité est articulée sur l'extrémité inférieure du kelly 18. En commandant les vérins 42 et 44, on peut donc ainsi commander l'angulation de la tête 20 par rapport à la verticale autour de l'axe XX' défini par l'axe 38. De préférence, les vérins sont hydrauliques et leur système de commande est disposé à l'extrémité inférieure du kelly 18.In this first embodiment, the fixing plate 30 of the head 20 is connected to the lower end 18a of the kelly 18 by a pivoting system 36. The pivoting system essentially consists of an axis 38 which extends along the direction XX 'orthogonal to the general direction of the kelly and the axes YY' of rotation of the rotary tools. In known manner, the shaft 38 is mounted in bearings carried respectively by lugs 40 extending the lower end 18a of the kelly and by non-visible bearings integral with the fixing plate 30. To control the pivoting of the head 20 by relative to the lower end of the kelly, the pivoting system 36 also comprises means for rotating the head 20 with respect to the end 18a of the kelly around the axis 38. In the embodiment considered, these control means are constituted by two jacks 42 and 44, one of which end is articulated on the attachment plate 30 of the head 20 and the other end is articulated on the lower end of the kelly 18. By controlling the cylinders 42 and 44, it is thus possible to control the angulation of the head 20 relative to the vertical axis XX 'defined by the axis 38. Preferably, the cylinders are hydraulic and their control system is disposed at the lower end of the kelly 18.

On comprend ainsi que dès qu'une déviation de la tête de forage et de mélange par rapport à la verticale est détectée par tout moyen convenable, il est possible, depuis la surface, de commander les vérins 42 et 44 pour donner une angulation convenable à la tête 20 et ainsi corriger la trajectoire de l'outil de forage selon la direction YY'.It will thus be understood that as soon as a deflection of the drilling and mixing head relative to the vertical is detected by any suitable means, it is possible, from the surface, to control the cylinders 42 and 44 to give a suitable angulation to the the head 20 and thus correct the trajectory of the drill bit in the direction YY '.

Ainsi que l'on a déjà indiqué, les corrections de trajectoire selon la direction XX' peuvent être obtenues en commandant de façon différentielle les moteurs entraînant la rotation des outils rotatifs 22 et 24.As already indicated, the trajectory corrections in the direction XX 'can be obtained by differentially controlling the motors driving the rotation of the rotary tools 22 and 24.

En se référant aux figures 4 et 5, on va décrire une variante du premier mode de mise en oeuvre de l'invention. Selon cette variante, la tête de forage et de mélange qui porte la référence 20' est constituée par deux parties distinctes 110 et 112. Chaque partie comprend une demi-plaque 32a, 32b symétriques et indépendantes l'une de l'autre. Sur chaque demi-plaque 32a, 32b sont montés deux outils de forage 22a, 22b constituant respectivement les outils de forage 22 et 24.Referring to Figures 4 and 5, we will describe a variant of the first embodiment of the invention. According to this variant, the drilling and mixing head which bears the reference 20 'is constituted by two distinct parts 110 and 112. Each part comprises a half-plate 32a, 32b symmetrical and independent of one another. On each half-plate 32a, 32b are mounted two drilling tools 22a, 22b respectively constituting the drilling tools 22 and 24.

La partie supérieure de chaque demi-plaque 32a, 32b est montée pivotante autour de l'axe de pivotement 38 monté à l'extrémité inférieure du kelly 18. Chaque demi-plaque 32a, 32b est solidaire d'une extrémité d'un des vérins 42 et 44. Les vérins 42 et 44 peuvent être commandés séparément. On peut ainsi donner aux deux outils de forage 22 et 24 des angulations inverses par rapport à la direction longitudinale du kelly 18. Cette configuration permet de corriger un vrillage du kelly.The upper part of each half-plate 32a, 32b is pivotally mounted about the pivot axis 38 mounted at the lower end of the kelly 18. Each half-plate 32a, 32b is secured to one end of one of the cylinders 42 and 44. Cylinders 42 and 44 can be ordered separately. It is thus possible to give the two drilling tools 22 and 24 angulations that are opposite to the longitudinal direction of the kelly 18. This configuration makes it possible to correct kelly twist.

En se référant maintenant aux figures 6 et 7, on va décrire un deuxième mode de réalisation de l'installation objet de l'invention.Referring now to Figures 6 and 7, there will be described a second embodiment of the facility object of the invention.

Dans ce deuxième mode de réalisation, la tête de forage et de mélange 20 qui est en tout point identique à celle qui a été décrite en liaison avec les figures 2 et 3 est directement boulonnée par sa plaque de fixation 30 sur l'extrémité inférieure 18a du kelly en obtenant ainsi une liaison aussi rigide que possible entre le kelly 18 et la tête 20. Pour permettre la correction de trajectoire, la portion du kelly à proximité de son extrémité inférieure 18a, et plus précisément dans sa zone 18b, est équipée de deux volets identiques 50 et 52 qui sont montés pivotants autour d'un axe géométrique xx' qui est orthogonal aux axes de rotation des outils rotatifs 22 et 24.In this second embodiment, the drilling and mixing head 20 which is identical in all respects to that described in connection with FIGS. 2 and 3 is directly bolted by its fixing plate 30 to the lower end 18a. kelly thus obtaining a connection as rigid as possible between the kelly 18 and the head 20. To allow the correction of trajectory, the portion of the kelly near its lower end 18a, and more precisely in its zone 18b, is equipped with two identical flaps 50 and 52 which are pivotally mounted about a geometric axis xx 'which is orthogonal to the axes of rotation of the rotary tools 22 and 24.

Au repos, les deux volets sont symétriques par rapport au kelly.At rest, the two flaps are symmetrical with respect to the kelly.

Sur la figure 8, on a représenté en détail un premier mode de montage des volets 50 et 52 sur la portion 18b du kelly. Les volets 50 et 52 sont solidaires d'un axe commun de mise en rotation 54 qui traverse les parois du kelly par des paliers 56 et 58. Les volets 50 et 52 qui, au repos, sont verticaux, sont symétriques par rapport à l'axe géométrique xx' défini par l'axe de rotation 54. A l'intérieur du kelly sont prévus des moyens de commande de la rotation des volets 50 et 52. Ces moyens de commande peuvent consister en un moteur par exemple hydraulique 60 dont l'arbre de sortie entraîne un premier pignon 62 engrenant avec un deuxième pignon 64 solidaire de l'axe de pivotement 54. Ainsi, dans ce mode de réalisation, les deux volets 50 et 52 on le même angle de pivotement. Le moteur 60 est commandé depuis la surface.In Figure 8, there is shown in detail a first mounting mode of the flaps 50 and 52 on the portion 18b of the kelly. The flaps 50 and 52 are integral with a common axis of rotation 54 which passes through the walls of the kelly by bearings 56 and 58. The flaps 50 and 52 which, at rest, are vertical, are symmetrical with respect to the geometric axis xx 'defined by the axis of rotation 54. Inside the kelly are provided means for controlling the rotation of the flaps 50 and 52. These control means may consist of a motor, for example a hydraulic motor 60 of which output shaft drives a first gear 62 meshing with a second gear 64 integral with the pivot axis 54. Thus, in this embodiment, the two flaps 50 and 52 are the same pivot angle. The motor 60 is controlled from the surface.

Sur la figure 9, on a représenté un deuxième mode de montage des volets 50 et 52 sur la portion 18b du kelly, les volets étant identiques à ceux qui sont représentés sur la figure 6. Dans ce montage, chaque volet est monté sur un demi-arbre de pivotement respectivement 70 et 72 qui traverse la paroi du kelly 18 par des paliers 56 et 58. Chaque demi-arbre de mise en rotation 70 et 72 est entraîné par un moteur spécifique 74 et 76 par l'intermédiaire d'un train d'engrenages 78 et 80.FIG. 9 shows a second method of mounting the flaps 50 and 52 on the portion 18b of the kelly, the flaps being identical to those shown in FIG. 6. In this arrangement, each flap is mounted on a half pivot shaft respectively 70 and 72 which passes through the wall of the kelly 18 by bearings 56 and 58. Each rotating half-shaft 70 and 72 is driven by a specific motor 74 and 76 via a train gears 78 and 80.

Du fait que les volets peuvent être orientés indépendamment, on comprend que ces volets permettent non seulement de corriger une erreur de trajectoire selon la direction XX' des axes de rotation des outils rotatifs, mais également des erreurs de trajectoire dues à un vrillage du kelly, ce vrillage étant corrigé en donnant des orientations différentes aux volets 50 et 52.Because the flaps can be oriented independently, it is understood that these flaps not only make it possible to correct a trajectory error in the direction XX 'of the rotational axes of the rotary tools, but also of the trajectory errors due to kelly twisting, this twisting being corrected by giving different orientations to the shutters 50 and 52.

Les volets 50 et 52 agissent comme un safran de bateau ou une gouverne de profondeur d'un avion « plan en canard » dans le matériau non solide qui remplit la tranchée en cours d'excavation. Pour que les volets correctement orientés puissent produire leur effet de déviation, notamment compte tenu de la densité du matériau qui remplit la tranchée, il est nécessaire que les volets, c'est-à-dire l'ensemble constitué par le kelly et la tête 20, présentent une certaine vitesse.The flaps 50 and 52 act as a boat rudder or elevator of a "duck plane" plane in the non-solid material that fills the trench being excavated. So that properly oriented shutters can produce their deviation effect, especially given the density of the material that fills the trench, it is necessary that the flaps, that is to say the assembly consisting of the kelly and the head 20, have a certain speed.

Sur les figures 10a et 10c, on a représenté les différentes étapes d'utilisation de l'installation de réalisation de paroi enterrée selon le deuxième mode de mise en oeuvre.In Figures 10a and 10c, there is shown the various steps of use of the buried wall embodiment installation according to the second embodiment.

Sur la figure 10a, on a représenté la tranchée 100 en cours de forage, l'extrémité inférieure 102 de la tranchée étant déviée. Sur cette figure, on a également représenté schématiquement le matériau 104 remplissant la tranchée et constitué par le mélange de sol découpé et de liant. A la suite de la détection de la déviation de la tête 20, l'ensemble kelly 18/tête 20 est remonté dans la tranchée d'une hauteur suffisante comme le montre la figure 8b. Ensuite, les volets 50 et 52 sont convenablement orientés pour corriger la déviation de l'outil de forage précédemment détectée. Après l'orientation correcte des volets, à l'aide du mât de guidage, on commande la descente de l'ensemble kelly 18/tête 20 avec une vitesse contrôlée convenable. Si la longueur de la course et la vitesse linéaire de déplacement du kelly 18 sont convenables, les volets 50 et 52 jouent leur rôle de déflection de l'extrémité inférieure du kelly et donc de la tête 20.In Figure 10a, there is shown the trench 100 being drilled, the lower end 102 of the trench being deflected. This figure also schematically shows the material 104 filling the trench and constituted by the mixture of cut soil and binder. Following the detection of the deflection of the head 20, the kelly 18 / head assembly 20 is raised in the trench of sufficient height as shown in FIG. 8b. Next, the flaps 50 and 52 are suitably oriented to correct the deflection of the previously detected drill bit. After the correct orientation of the flaps, using the guide mast, it controls the descent of the kelly 18 / head 20 with a suitable controlled speed. If the length of the stroke and the linear speed of displacement of the kelly 18 are suitable, the flaps 50 and 52 play their role of deflecting the lower end of the kelly and thus of the head 20.

Sur les figures 10a à 10c, on a envisagé le cas où la déviation de la tranchée se produisait selon la direction des axes de rotation des outils rotatifs de la tête de forage. Si la déviation détectée correspondait à un vrillage du kelly, les mêmes opérations seraient réalisées mais avant de provoquer la descente du kelly et de la tête 20 dans la tranchée, on donnerait aux volets 50 et 52 des inclinaisons différentes pour corriger l'effet de vrillage.In FIGS. 10a to 10c, consideration is given to the case where the deviation of the trench occurred in the direction of the axes of rotation of the rotary tools of the drill head. If the detected deviation corresponded to kelly twisting, the same operations would be performed but before causing the kelly and the head 20 to descend into the trench, the flaps 50 and 52 would be given different inclinations to correct the twisting effect. .

Pour corriger la trajectoire de la tête 20 et donc le tracé de la tranchée, on peut également arrêter la descente du kelly dès qu'une déviation est détectée. On oriente alors convenablement les volets 50 et 52 en fonction de la correction à apporter. On provoque alors la remontée du kelly et de la tête avec une vitesse prédéterminée. La déflection provoquée par les volets permet, par raclage des parois de la tranchée par les outils rotatifs, de corriger le tracé de la tranchée déjà réalisée.To correct the trajectory of the head 20 and thus the trench, we can also stop the descent of the kelly as soon as a deviation is detected. The flaps 50 and 52 are then properly oriented according to the correction to be made. It then causes the rise of the kelly and the head with a predetermined speed. The deflection caused by the flaps makes it possible, by scraping the walls of the trench by the rotary tools, to correct the shape of the trench already made.

Claims (9)

Installation de réalisation de paroi enterrée par mélange du sol avec un liant comprenant : - un mât sensiblement vertical de guidage ; - un kelly guidé en translation le long dudit mât ; - des moyens de déplacement vertical dudit kelly par rapport au mât ; - une tête de forage et de mélange du sol découpé avec un liant fixée à l'extrémité inférieure du kelly, ladite tête du forage et de mélange comportant deux outils rotatifs dont les axes sont parallèles entre eux et parallèles à une direction YY' sensiblement horizontale ; et - des moyens pour injecter un liant, ladite installation se caractérisant en ce qu'elle comprend en outre des moyens mécaniques commandables montés à l'extrémité inférieure dudit kelly pour provoquer une angulation par rapport à la verticale de ladite tête de forage et de mélange au moins autour d'un axe sensiblement orthogonal à ladite direction YY', par quoi la trajectoire de la tête de forage et de mélange peut être corrigée.Installation for producing a buried wall by mixing the soil with a binder comprising: a substantially vertical guide mast; a kelly guided in translation along said mast; means for vertically moving said kelly with respect to the mast; - A drilling head and soil mixture cut with a binder attached to the lower end of the kelly, said head of the drilling and mixing comprising two rotary tools whose axes are parallel to each other and parallel to a substantially horizontal direction YY '; and means for injecting a binder, said installation being characterized in that it further comprises controllable mechanical means mounted at the lower end of said kelly to cause angulation with respect to the vertical of said drilling and mixing head at least about a substantially orthogonal axis in said direction YY ', whereby the trajectory of the drilling and mixing head can be corrected. Installation selon la revendication 1, caractérisée en ce que lesdits moyens mécaniques commandables comprennent des moyens formant un axe de pivotement entre l'extrémité inférieure du kelly et ladite tête de forage et de mélange s'étendant selon une direction XX' sensiblement orthogonale à la direction YY' et des moyens de commande du pivotement de ladite tête autour dudit axe.Installation according to claim 1, characterized in that said controllable mechanical means comprise means forming a pivot axis between the lower end of the kelly and said drilling and mixing head extending in a direction XX 'substantially orthogonal to the direction YY 'and means for controlling the pivoting of said head about said axis. Installation selon la revendication 2, caractérisée en ce que lesdits moyens de commande comprennent au moins un vérin dont une extrémité est solidaire de la partie supérieure de ladite tête de forage et de mélange et dont l'autre extrémité est solidaire de l'extrémité inférieure du kelly.Installation according to claim 2, characterized in that said control means comprise at least one jack whose one end is secured to the upper part of said drill head and mixing and whose other end is secured to the lower end of the kelly. Installation selon la revendication 2, caractérisée en ce que ladite tête de forage et de mélange comprend deux parties distinctes juxtaposées et montées chacune sur ledit axe de pivotement, chaque partie comportant un outil rotatif de forage, les axes de rotation desdits outils étant parallèles entre eux lorsque les deux parties sont alignées, et en ce que chaque partie comprend des moyens propres de commande de pivotement.Installation according to claim 2, characterized in that said drilling and mixing head comprises two distinct parts juxtaposed and each mounted on said pivot axis, each part comprising a rotary drilling tool, the axes of rotation of said tools being parallel to each other when both sides are aligned, and in that each part comprises own pivot control means. Installation selon la revendication 1, caractérisée en ce que ladite tête de forage et de mélange est rigidement fixée à l'extrémité inférieure du kelly et en ce que lesdits moyens mécaniques commandables comprennent deux volets sensiblement identiques montés de part et d'autre de l'extrémité inférieure du kelly pour pouvoir pivoter autour d'un axe commun sensiblement orthogonal à ladite direction YY', et des moyens de commande desdits volets autour dudit axe commun.Installation according to claim 1, characterized in that said drilling and mixing head is rigidly fixed to the lower end of the kelly and in that said controllable mechanical means comprise two substantially identical flaps mounted on either side of the lower end of the kelly to be able to pivot about a common axis substantially orthogonal to said direction YY ', and means for controlling said flaps about said common axis. Installation selon la revendication 5, caractérisée en ce que chaque volet comporte ses propres moyens de commande de pivotement.Installation according to claim 5, characterized in that each flap comprises its own pivot control means. Procédé de correction de trajectoire de la tête de forage et de mélange d'une installation selon l'une quelconque des revendications 5 et 6, caractérisé en ce qu'il comprend les étapes suivantes : - on détecte une erreur de trajectoire de ladite tête de forage et de mélange par rapport à la verticale selon la direction YY', ladite tête étant à une profondeur déterminée ; - on remonte, à l'aide du kelly, ladite tête d'une hauteur prédéterminée ; - on commande le pivotement desdits volets autour dudit axe commun en fonction de la correction à apporter ; et - on provoque la descente de la tête et du kelly, par quoi l'orientation angulaire desdits volets permet d'obtenir la correction de trajectoire. Method for correcting the trajectory of the drilling head and for mixing an installation according to any one of Claims 5 and 6, characterized in that it comprises the following steps: an error in the trajectory of said drilling and mixing head is detected with respect to the vertical in the direction YY ', said head being at a determined depth; - Go back, using the kelly, said head of a predetermined height; - It controls the pivoting of said flaps around said common axis according to the correction to be made; and - It causes the descent of the head and the kelly, whereby the angular orientation of said flaps provides the correction of trajectory. Procédé de correction de trajectoire de la tête de forage et de mélange d'une installation selon la revendication 6, caractérisé en ce qu'il comprend les étapes suivantes : - on détecte une erreur de trajectoire de ladite tête de forage et de mélange correspondant à un vrillage autour de l'axe longitudinal du kelly ; - on remonte, à l'aide du kelly, ladite tête d'une hauteur prédéterminée ; - on commande séparément le pivotement de chacun desdits volets autour de l'axe commun en fonction de la correction de vrillage à apporter ; et - on provoque la descente de la tête et du kelly, par quoi l'orientation angulaire desdits volets permet d'obtenir la correction de trajectoire. Method for correcting the trajectory of the drilling head and for mixing an installation according to claim 6, characterized in that it comprises the following steps: detecting a trajectory error of said drilling and mixing head corresponding to a twisting around the longitudinal axis of the kelly; - Go back, using the kelly, said head of a predetermined height; the pivoting of each of said flaps around the common axis is controlled separately according to the twisting correction to be made; and - It causes the descent of the head and the kelly, whereby the angular orientation of said flaps provides the correction of trajectory. Procédé de correction de la trajectoire de la tête de forage et de mélange d'une installation selon l'une quelconque des revendications 5 et 6, caractérisé en ce qu'il comprend les étapes suivantes : - on détecte une erreur de trajectoire de ladite tête de forage et de mélange ; - on arrête le mouvement de descente de ladite tête dans la tranchée ; - on commande le pivotement des volets en fonction de l'erreur de trajectoire détectée ; et - on provoque la remontée de ladite tête et du kelly avec une vitesse prédéterminée, par quoi on obtient une correction de la direction du forage. Method for correcting the trajectory of the drilling head and for mixing an installation according to any one of Claims 5 and 6, characterized in that it comprises the following steps: detecting a trajectory error of said drilling and mixing head; the movement of the descent of said head into the trench is stopped; the flaps are pivoted according to the detected path error; and - It raises said head and kelly with a predetermined speed, whereby we obtain a correction of the direction of drilling.
EP06116711A 2005-07-21 2006-07-06 Device for making a trenchwall by soil mixing Withdrawn EP1746213A1 (en)

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FR0507754A FR2888859B1 (en) 2005-07-21 2005-07-21 MIXED FLOOR WALL MOUNTING INSTALLATION WITH BINDER AND METHOD OF CORRECTING TRACK OF DRILLING HEAD OF SUCH FACILITY

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EP2028319A1 (en) * 2007-08-23 2009-02-25 BAUER Maschinen GmbH Milling device for earth working.
EP2417304B1 (en) 2009-04-10 2018-06-06 Soletanche Freyssinet Soil excavation machine of the mill type provided with a movable carriage
WO2010116081A1 (en) * 2009-04-10 2010-10-14 Soletanche Freyssinet Soil excavation machine of the mill type provided with a movable carriage
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US8931978B2 (en) 2009-12-15 2015-01-13 Soilmec S.P.A. Tool for thin diaphragms
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CN108495966A (en) * 2015-09-10 2018-09-04 索列丹斯-弗莱西奈公司 Drilling machine
US10480147B2 (en) 2015-09-10 2019-11-19 Soletanche Freyssinet Drilling machine
EP3347527B1 (en) * 2015-09-10 2021-03-03 Soletanche Freyssinet Machine for making a diaphragm wall
CN108495966B (en) * 2015-09-10 2021-09-21 索列丹斯-弗莱西奈公司 Drilling machine
PL422492A1 (en) * 2017-08-08 2019-02-11 Instytut Badawczy Dróg i Mostów Device for in-place forming of continuous walls made from the earth reinforced by a bonding agent
US20210262192A1 (en) * 2020-02-25 2021-08-26 Soletanche Freyssinet Excavation machine having a frame equipped with guide wings

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