EP2417304B1 - Soil excavation machine of the mill type provided with a movable carriage - Google Patents

Soil excavation machine of the mill type provided with a movable carriage Download PDF

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Publication number
EP2417304B1
EP2417304B1 EP10723203.5A EP10723203A EP2417304B1 EP 2417304 B1 EP2417304 B1 EP 2417304B1 EP 10723203 A EP10723203 A EP 10723203A EP 2417304 B1 EP2417304 B1 EP 2417304B1
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EP
European Patent Office
Prior art keywords
bar
excavation machine
soil
cutter type
cutting tools
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EP10723203.5A
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German (de)
French (fr)
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EP2417304A1 (en
Inventor
Philippe Chagnot
Laurent Pivert
Régis Bernasinski
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Soletanche Freyssinet SA
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Soletanche Freyssinet SA
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Classifications

    • 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
    • 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

Definitions

  • the present invention relates to the technical field of straw-type soil excavating machines for producing rectangular panels.
  • These machines are used for excavating trenches in the ground, especially for the purpose of producing molded walls consisting of a plurality of rectangular panels.
  • the invention therefore does not relate to machines having mixing tools for performing soil-mixing operations.
  • the frame 12 comprises a frame 12 suspended at the end of lifting means 14, this frame being provided at its lower end 12a with two wheels 16 driven in rotation by hydraulic motors.
  • the wheels 16 comprise drums with horizontal axes provided with cutting teeth 18 distributed on their peripheries.
  • teeth 18 have the role of excavating the ground 20 to transform it into small pieces, debris, which can then be transported by suction using a pipe 22 connected to a suction pump 24 placed at the inside the chassis 12.
  • the chassis descends vertically, driven by its own weight, while remaining suspended from the lifting means.
  • the frame must also have transverse dimensions close to those of the forming trench to be guided longitudinally by the latter during the excavation operation.
  • the chassis is a very bulky and very heavy because it weighs several tens of tons. This piece is therefore expensive and inconvenient to transport. However, it is necessary because its mass is a ballast that generates a bearing force on the cutting teeth.
  • Such a machine is also described in EP 0 553 378 . It has a variable length bar which requires a mounting complex power supply lines of the engines. In addition, it has a particularly bulky chassis.
  • An object of the invention is to provide a compact milling type excavating machine and overcoming the aforementioned drawbacks.
  • This bar is in the form of a beam that can be full or hollow.
  • the length of the bar is very large compared to its two other dimensions.
  • the bar is preferably made up of several portions of bar that is put end to end before the use of the machine.
  • the bar therefore has a much smaller footprint than the chassis of the prior art, thanks to which it is easy to disassemble and transport the constituent elements of the excavating machine. Nevertheless, when using the machine according to the invention, the length of the longitudinal bar is fixed, that is to say that you do not add or remove bar portions to change its length.
  • the bar having a substantially lower mass than the chassis of the prior art, does not have a mass sufficient to exert the bearing force on the milling tools.
  • the thrust force on the milling tools is essentially achieved by moving the carriage along the mast.
  • the force exerted by the carriage on the bar advantageously replaces the weight of the chassis of the prior art.
  • the carriage can slide along the mast being moved by otherwise known driving members, for example by means of a cable connected to a drive motor disposed on the carrier vehicle.
  • Another advantage of the invention is that it is possible to precisely modulate the thrust force exerted on the bar by the carriage.
  • the excavating machine comprises at least one discharge pipe connected to the pumping means, this discharge pipe for the evacuation of excavated debris.
  • the discharge pipe comprises a first portion connecting the pumping means to the upper end of the bar, a second portion connecting the upper end of the bar to a connection box fixed to the mast, and a third portion connected to the connection box, thanks to which it is possible to do without a winder.
  • the carrier vehicle that is to say the vehicle carrying the means for suspending the frame
  • the carrier vehicle is generally equipped with a winder dedicated to the winding of the discharge pipe. It is therefore understood that another advantage of the invention is to be able to use a conventional carrier vehicle that is usually found on the market, which reduces the cost of the machine and its use.
  • the discharge pipe is housed at least partly inside the bar.
  • the hydraulic hydraulic supply lines of the pumping means are also housed at least partly inside the bar.
  • the pumping means comprise two pumps disposed on either side of the bar, above the milling tools, these pumps being preferentially but not necessarily removable.
  • the thickness of each of the milling tools is between 400 and 600 mm.
  • Such a thickness is generally considered to be a small thickness.
  • the transverse size of the milling tools is substantially greater than the width of the bar .
  • the invention also relates to a method of excavating a wall in a soil using a milling type excavation machine according to the invention, in which process, during the excavation of the wall, the carriage exerts a descending vertical pushing force on the bar.
  • This thrust force the intensity of which is preferably between 15 and 50 tons, makes it possible, as already stated, to exert a sufficient bearing force on the milling tools, and thus to do without a ballast as the chassis of the prior art.
  • the invention relates to the use of the excavating machine according to the invention, in order to form a molded wall, known per se, in a soil.
  • the excavating machine 100 first comprises a carrier 102, preferably a tracked vehicle, for its movement.
  • the excavation machine further comprises a mast 104 having a longitudinal direction D1 which extends here in a substantially vertical direction.
  • this mast may be slightly inclined relative to a vertical direction.
  • the mast 104 is fixed to the carrier 102 by holding means 106 which furthermore make it possible to modify the inclination of the mast, for example in order to adapt the excavation to the soil structure.
  • This pole has a lower end 104a and upper end 104b, the lower end 104b is disposed a few meters above the ground surface S.
  • the excavating machine 100 further comprises a longitudinal bar 108, having the structure of a beam of fixed length, which extends in a longitudinal direction D2, between a lower end 108a and an upper end 108b.
  • the bar 108 carries at its lower end 108a two rotary milling tools 110, 112. These two tools extend along two parallel axes A1 , A2 and distinct. As we see on the figure 2 , These two axes A1, A2 are perpendicular to the longitudinal direction D2 of the rod 108 and also orthogonal to the trench that is desired. In this example, the two axes A1 A2 are contained in the same plane which is substantially parallel to the surface of the ground S. In addition, the longitudinal direction D2 of the bar 108 is substantially parallel to the longitudinal direction D1 of the mast 104.
  • each milling tool 110, 112 comprises two coaxial cylindrical drums 110a, 110b, 112a, 112b which extend symmetrically on either side of the lower end 108a of the bar 108, and which have outer peripheral surfaces of where radially extending cutting teeth (not shown here).
  • each of the milling tools is of the order of 500 mm, whereby the invention makes it possible in particular to make trenches of small thickness.
  • the milling tools 110, 112 are rotated by two hydraulic motors 150 which are housed inside the drums 110a, 110b, 112a, 112b, these motors being fixed to the lower end 108a of the bar. 108 by means of support plates 113.
  • motors 150 which are housed inside the drums 110a, 110b, 112a, 112b, these motors being fixed to the lower end 108a of the bar. 108 by means of support plates 113.
  • FIG. EP 0 262 050 it will be possible to use the motorization technology disclosed in FIG. EP 0 262 050 .
  • drums of each of the milling tools are symmetrical with respect to a plane of symmetry orthogonal to the axes of rotation of the milling tools.
  • the axes of rotation A1 and A2 are fixed relative to each other so that the excavated trench has a rectangular geometry.
  • the bar 108 is moved in the longitudinal direction D1 of the mast 104.
  • the excavating machine 100 further includes a carriage 114 which is slidably mounted along the mast, as its longitudinal direction D1. Displacement means (not shown here) make it possible to move the carriage 114 along the mast 104 towards one or the other of its ends.
  • This carriage 114 is fixed to the bar 108 by holding means 116 disposed on the carriage which may optionally be uncoupled from the bar during maintenance or dismantling of the machine.
  • the holding means 116 are secured to the bar 108.
  • the lower end 104a of the mast comprises translation guide means 118 of the bar 108.
  • these guide means grip the bar so that the latter is free to slide through said guide means.
  • FIG 3 There is illustrated the excavating machine 100 according to the invention during an excavating operation.
  • the milling tools 110, 112 being rotated, the carriage 114 is moved towards the lower end 104a of the mast 104 while exerting a downward thrust force F on the bar 108, and thus on the cutting teeth.
  • the intensity of this thrust force F is of the order of 30 tons, so as to excavate the ground S.
  • the excavating machine 100 further comprises pumping means 120 disposed at the lower end 108a of the bar 108, these pumping means being intended to suck the soil debris excavated by the milling tools 110, 112.
  • These pumping means 120 comprise in this case two pumps 122,124, preferably centrifugal type with hydraulic drive, which are arranged on either side of the lower end 108a of the bar 108, above the milling tools 110,112, between two planes orthogonal to the A1 axes , A2 milling tools and passing through the axial ends of the milling tools.
  • two pumps 122,124 preferably centrifugal type with hydraulic drive, which are arranged on either side of the lower end 108a of the bar 108, above the milling tools 110,112, between two planes orthogonal to the A1 axes , A2 milling tools and passing through the axial ends of the milling tools.
  • These pumps are here housed in two boxes 126,128 whose thickness, considered in a direction parallel to the axes of the milling tools, is less than the thickness of each of the milling tools, as a result of which, the pumps 122,124, and especially their caissons, do not interfere with the milling tools during the excavation operation.
  • Each of the pumps 122, 124 is provided with a suction nozzle 130 through which soil debris enters.
  • the pumps 122,124 are connected to the lower end 132a of a discharge pipe 132.
  • the discharge pipe 132 is essentially housed inside the bar 108 whose interior is hollow. More specifically, the discharge pipe has a first portion 132 ' extending in the longitudinal direction D2 of the bar between its lower end 108a and its upper end 108b, the discharge pipe 132 coming out of the bar 108 by its upper end. 108b.
  • the pipe is then connected to a connection box (not represented here) by a second pipe portion 132 " , this connection box being fixed to the mast 104.
  • the third pipe portion 132"' is fixed to the connection box and ends with an outlet mouth that leads to a storage location and / or debris treatment.
  • hydraulic motors 150 for driving the rotary milling tools, as well as the hydraulically actuated pumps 122, 124 are supplied with hydraulic energy by hydraulic lines 160 which extend in the bar alongside the (or) 132.
  • hydraulic lines 160 follow essentially the same path as the discharge line 132.
  • the hydraulic lines are connected to a hydraulic source disposed on or near the carrier 102.
  • hydraulic channels for feeding the two hydraulic motors arranged in the pairs of drums 110a, 110b, 112a, 112b are preferentially formed inside the support plates 113, like the device of EP 0 262 050 .

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

Description

Arrière plan de l'inventionBackground of the invention

La présente invention concerne le domaine technique des machines d'excavation de sol du type fraise destinées à réaliser des panneaux rectangulaires.The present invention relates to the technical field of straw-type soil excavating machines for producing rectangular panels.

Ces machines sont utilisées pour l'excavation de tranchées dans le sol, notamment dans le but de réaliser des parois moulées constituées d'une pluralité de panneaux rectangulaires.These machines are used for excavating trenches in the ground, especially for the purpose of producing molded walls consisting of a plurality of rectangular panels.

L'invention n'a donc pas pour objet les machines ayant des outils de mélange pour réaliser des opérations de type soil-mixing.The invention therefore does not relate to machines having mixing tools for performing soil-mixing operations.

Sur la figure 1, on a représenté une machine d'excavation de type fraise 10, telle qu'on la connaît aujourd'hui.On the figure 1 a cutter type excavating machine 10 as known today is shown.

Elle comporte un châssis 12 suspendu à l'extrémité de moyens de levage 14, ce châssis étant muni à son extrémité inférieure 12a de deux roues 16 entraînées en rotation par des moteurs hydrauliques. Les roues 16 comportent des tambours à axes horizontaux munis de dents de coupe 18 réparties sur leurs périphéries.It comprises a frame 12 suspended at the end of lifting means 14, this frame being provided at its lower end 12a with two wheels 16 driven in rotation by hydraulic motors. The wheels 16 comprise drums with horizontal axes provided with cutting teeth 18 distributed on their peripheries.

Ces dents 18 ont pour rôle d'excaver le terrain 20 pour le transformer en morceaux de petites dimensions, les débris, qui peuvent ensuite être transportés par aspiration à l'aide d'un tuyau 22 reliée à une pompe d'aspiration 24 placée à l'intérieure le châssis 12.These teeth 18 have the role of excavating the ground 20 to transform it into small pieces, debris, which can then be transported by suction using a pipe 22 connected to a suction pump 24 placed at the inside the chassis 12.

Lors de l'opération d'excavation, le châssis descend verticalement, entraîné par son poids propre, tout en restant suspendu aux moyens de levage.During the excavation operation, the chassis descends vertically, driven by its own weight, while remaining suspended from the lifting means.

Le châssis doit également avoir des dimensions transversales proches de celles de la tranchée en formation afin d'être guidé longitudinalement par cette dernière lors de l'opération d'excavation.The frame must also have transverse dimensions close to those of the forming trench to be guided longitudinally by the latter during the excavation operation.

Comme on le comprend à l'aide de la figure 1, le châssis est donc une pièce très volumineuse et très lourde puisqu'elle pèse plusieurs dizaines de tonnes. Cette pièce est donc coûteuse et malcommode à transporter. Elle est cependant nécessaire car sa masse constitue un lest qui permet de générer une force d'appui sur les dents de coupe.As can be understood by using the figure 1 , the chassis is a very bulky and very heavy because it weighs several tens of tons. This piece is therefore expensive and inconvenient to transport. However, it is necessary because its mass is a ballast that generates a bearing force on the cutting teeth.

Une telle machine est également décrite dans EP 0 553 378 . Elle comporte une barre de longueur variable ce qui nécessite un montage complexe des lignes d'alimentation en énergie des moteurs. En outre, elle présente un châssis particulièrement encombrant.Such a machine is also described in EP 0 553 378 . It has a variable length bar which requires a mounting complex power supply lines of the engines. In addition, it has a particularly bulky chassis.

Objet et résumé de l'inventionObject and summary of the invention

Un but de l'invention est de proposer une machine d'excavation du type fraise compacte et remédiant aux inconvénients précités.An object of the invention is to provide a compact milling type excavating machine and overcoming the aforementioned drawbacks.

L'invention atteint son but par le fait qu'elle comporte :

  • un mât ayant une direction longitudinale,
  • une barre longitudinale de longueur fixe qui présente une extrémité inférieure munie de deux outils de fraisage d'axes parallèles et distincts, lesdits axes étant fixes l'un par rapport à l'autre, les deux outils de fraisage rotatifs s'étendant de part et d'autre de l'extrémité inférieure de la barre,
  • des moyens moteurs hydrauliques pour entraîner les outils de fraisage en rotation, lesdits moyens moteurs hydrauliques étant alimentés par des conduites hydrauliques qui sont logées au moins en partie à l'intérieur de la barre longitudinale,
  • un chariot, coulissant selon la direction longitudinale du mât, ledit chariot étant destiné à exercer sur la barre une force de poussée descendante selon la direction longitudinale du mât, et
  • des moyens de pompage disposés à l'extrémité inférieure de la barre et destinés à aspirer les débris de sol excavés par les outils de fraisage.
The invention achieves its goal by the fact that it comprises:
  • a mast having a longitudinal direction,
  • a longitudinal bar of fixed length which has a lower end provided with two milling tools of parallel and distinct axes, said axes being fixed relative to each other, the two rotary milling tools extending from one side to the other; else from the bottom end of the bar,
  • hydraulic drive means for driving the rotary milling tools, said hydraulic motor means being fed by hydraulic lines which are housed at least partly inside the longitudinal bar,
  • a carriage sliding in the longitudinal direction of the mast, said carriage being intended to exert on the bar a downward thrust force in the longitudinal direction of the mast, and
  • pumping means disposed at the lower end of the bar and for sucking soil debris excavated by the milling tools.

Cette barre se présente sous la forme d'une poutre pouvant être pleine ou creuse. Autrement dit, au sens de l'invention, la longueur de la barre est très grande par rapport à ses deux autres dimensions.This bar is in the form of a beam that can be full or hollow. In other words, in the sense of the invention, the length of the bar is very large compared to its two other dimensions.

Pour faciliter son transport la barre est préférentiellement constituée de plusieurs portions de barre que l'on met bout à bout avant l'utilisation de la machine. La barre présente donc un encombrement beaucoup plus réduit que celui du châssis de l'art antérieur, grâce à quoi il est aisé de démonter et transporter les éléments constitutifs de la machine d'excavation. Néanmoins, lors de l'utilisation de la machine selon l'invention, la longueur de la barre longitudinale est fixe, c'est-à-dire que l'on ne vient pas ajouter ou enlever des portions de barre de manière à modifier sa longueur.To facilitate its transport the bar is preferably made up of several portions of bar that is put end to end before the use of the machine. The bar therefore has a much smaller footprint than the chassis of the prior art, thanks to which it is easy to disassemble and transport the constituent elements of the excavating machine. Nevertheless, when using the machine according to the invention, the length of the longitudinal bar is fixed, that is to say that you do not add or remove bar portions to change its length.

Il est donc entendu que la barre, présentant une masse sensiblement inférieure à celle du châssis de l'art antérieur, ne présente pas une masse suffisante pour exercer la force d'appui sur les outils de fraisage.It is therefore understood that the bar, having a substantially lower mass than the chassis of the prior art, does not have a mass sufficient to exert the bearing force on the milling tools.

Selon l'invention, la force de poussée sur les outils de fraisage est réalisée essentiellement grâce au déplacement du chariot le long du mât. En d'autres termes, la force exercée par le chariot sur la barre, remplace avantageusement le poids du châssis de l'art antérieur.According to the invention, the thrust force on the milling tools is essentially achieved by moving the carriage along the mast. In other words, the force exerted by the carriage on the bar, advantageously replaces the weight of the chassis of the prior art.

Le chariot peut coulisser le long du mât en étant déplacé par des organes moteurs connus par ailleurs, par exemple par le biais d'un câble relié à un moteur d'entrainement disposé sur le véhicule porteur.The carriage can slide along the mast being moved by otherwise known driving members, for example by means of a cable connected to a drive motor disposed on the carrier vehicle.

Un autre avantage de l'invention est qu'il est possible de moduler précisément la force de poussée exercée sur la barre par le chariot.Another advantage of the invention is that it is possible to precisely modulate the thrust force exerted on the bar by the carriage.

Aussi, grâce à l'invention, est-il possible d'adapter l'effort de coupe en fonction de la nature du sol à excaver.Also, thanks to the invention, is it possible to adapt the cutting force according to the nature of the soil to be excavated.

De manière préférentielle, la machine d'excavation selon l'invention comporte au moins une conduite de refoulement reliée aux moyens de pompage, cette conduite de refoulement permettant l'évacuation des débris excavés.Preferably, the excavating machine according to the invention comprises at least one discharge pipe connected to the pumping means, this discharge pipe for the evacuation of excavated debris.

Avantageusement, la conduite de refoulement comprend une première portion reliant les moyens de pompage à l'extrémité supérieure de la barre, une seconde portion reliant l'extrémité supérieure de la barre à un boitier de connexion fixé au mât, et une troisième portion reliée au boitier de connexion, grâce à quoi il est possible de se passer d'un enrouleur.Advantageously, the discharge pipe comprises a first portion connecting the pumping means to the upper end of the bar, a second portion connecting the upper end of the bar to a connection box fixed to the mast, and a third portion connected to the connection box, thanks to which it is possible to do without a winder.

En effet, dans l'art antérieur, le véhicule porteur, c'est-à-dire le véhicule portant les moyens pour suspendre le châssis, est généralement équipé d'un enrouleur dédié à l'enroulement de la conduite de refoulement. On comprend donc qu'un autre intérêt de l'invention est de pouvoir utiliser un véhicule porteur classique que l'on trouve habituellement dans le commerce, ce qui permet de diminuer le coût de la machine et de son utilisation.Indeed, in the prior art, the carrier vehicle, that is to say the vehicle carrying the means for suspending the frame, is generally equipped with a winder dedicated to the winding of the discharge pipe. It is therefore understood that another advantage of the invention is to be able to use a conventional carrier vehicle that is usually found on the market, which reduces the cost of the machine and its use.

Selon un autre aspect avantageux de l'invention, la conduite de refoulement est logée au moins en partie à l'intérieur de la barre. De préférence, les conduites hydrauliques d'alimentation en énergie hydraulique des moyens de pompage sont également logées au moins en partie à l'intérieur de la barre.According to another advantageous aspect of the invention, the discharge pipe is housed at least partly inside the bar. Of Preferably, the hydraulic hydraulic supply lines of the pumping means are also housed at least partly inside the bar.

Un intérêt est d'éviter l'installation de conduites ou flexibles hydrauliques dans la tranchée qui pourrait entrainer un endommagement accéléré de ces derniers.An interest is to avoid the installation of hydraulic pipes or hoses in the trench which could lead to an accelerated damage of the latter.

Selon un mode de réalisation avantageux, les moyens de pompage comportent deux pompes disposées de part et d'autre de la barre, au dessus des outils de fraisage, ces pompes étant préférentiellement mais non nécessairement démontables.According to an advantageous embodiment, the pumping means comprise two pumps disposed on either side of the bar, above the milling tools, these pumps being preferentially but not necessarily removable.

L'utilisation de deux pompes au lieu d'une, comme dans l'art antérieur, permet de diminuer leur taille, et notamment leur encombrement selon une direction parallèle aux axes des outils de fraisage. Un intérêt est de pouvoir monter des outils de fraisage ayant une faible épaisseur axiale, en conséquence de quoi, la machine selon l'invention permet avantageusement de réaliser des tranchées d'épaisseurs plus faibles que celles pouvant être réalisées avec la machine de l'art antérieur.The use of two pumps instead of one, as in the prior art, reduces their size, and in particular their size in a direction parallel to the axes of the milling tools. An interest is to be able to mount milling tools having a small axial thickness, as a result of which, the machine according to the invention advantageously makes it possible to produce trenches of smaller thicknesses than those which can be produced with the machine of the art. prior.

De préférence, l'épaisseur de chacun des outils de fraisage, considérée selon une direction parallèle à leurs axes, est comprise entre 400 et 600 mm. Une telle épaisseur est généralement considérée comme étant une faible épaisseur.Preferably, the thickness of each of the milling tools, considered in a direction parallel to their axes, is between 400 and 600 mm. Such a thickness is generally considered to be a small thickness.

Selon un autre aspect de l'invention, considérée selon une direction orthogonale à la direction longitudinale de la barre et à une direction parallèle aux axes des outils de fraisage, l'encombrement transversal des outils de fraisage est sensiblement supérieur à la largeur de la barre. Un intérêt est de pouvoir fraiser sur une épaisseur supérieure à l'épaisseur de la barre, et ce, malgré l'absence de châssis.According to another aspect of the invention, considered in a direction orthogonal to the longitudinal direction of the bar and a direction parallel to the axes of the milling tools, the transverse size of the milling tools is substantially greater than the width of the bar . An interest is to mill on a thickness greater than the thickness of the bar, and this, despite the absence of chassis.

L'invention porte également sur un procédé d'excavation d'une paroi dans un sol à l'aide d'une machine d'excavation du type fraise selon l'invention, procédé dans lequel, lors de l'excavation de la paroi, le chariot exerce une force de poussée verticale descendante sur la barre.The invention also relates to a method of excavating a wall in a soil using a milling type excavation machine according to the invention, in which process, during the excavation of the wall, the carriage exerts a descending vertical pushing force on the bar.

Cette force de poussée, dont l'intensité est préférentiellement comprise entre 15 et 50 tonnes, permet, comme on l'a déjà dit, d'exercer une force d'appui suffisante sur les outils de fraisage, et donc de se passer d'un lest comme le châssis de l'art antérieur.This thrust force, the intensity of which is preferably between 15 and 50 tons, makes it possible, as already stated, to exert a sufficient bearing force on the milling tools, and thus to do without a ballast as the chassis of the prior art.

Enfin, l'invention porte sur l'utilisation de la machine d'excavation selon l'invention, en vue de former une paroi moulée, connue en soi, dans un sol.Finally, the invention relates to the use of the excavating machine according to the invention, in order to form a molded wall, known per se, in a soil.

Brève description des dessinsBrief description of the drawings

L'invention sera mieux comprise à la lecture de la description faite ci-après, à titre indicatif mais non limitatif, en référence aux dessins annexés, sur lesquels :

  • la figure 1 représente une machine d'excavation de type fraise de l'art antérieur ;
  • la figure 2 représente une machine d'excavation de type fraise selon la présente invention ;
  • la figure 3 illustre le procédé d'excavation mis en oeuvre par la machine de la figure 2 ; et
  • la figure 4 est une vue de détail de l'extrémité inférieure de la barre de la machine de la figure 2 , cette extrémité inférieure portant des outils de fraisage ainsi que des moyens de pompage.
The invention will be better understood on reading the description given below, by way of indication but without limitation, with reference to the appended drawings, in which:
  • the figure 1 represents a milling type excavation machine of the prior art;
  • the figure 2 represents a milling type excavation machine according to the present invention;
  • the figure 3 illustrates the excavation process implemented by the machine of the figure 2 ; and
  • the figure 4 is a detail view of the lower end of the machine bar the figure 2 , this lower end carrying milling tools and pumping means.

Description détaillée de l'inventionDetailed description of the invention

A l'aide des figures 2 à 4 , on va décrire un mode de réalisation préféré d'une machine d'excavation 100 de type fraise pour la réalisation de panneaux rectangulaires, conforme à la présente invention.With the help of Figures 2 to 4 Will be described a preferred embodiment of an excavating machine 100 Strawberry type for carrying out rectangular panels according to the present invention.

La machine d'excavation 100 comporte tout d'abord un porteur 102, de préférence un véhicule à chenilles, permettant son déplacement.The excavating machine 100 first comprises a carrier 102, preferably a tracked vehicle, for its movement.

Selon l'invention, la machine d'excavation comprend en outre un mât 104 présentant une direction longitudinale D1 qui s'étend ici selon une direction sensiblement verticale. Toutefois, sans sortir du cadre de la présente invention, ce mât peut être légèrement incliné par rapport à une direction verticale.According to the invention, the excavation machine further comprises a mast 104 having a longitudinal direction D1 which extends here in a substantially vertical direction. However, without departing from the scope of the present invention, this mast may be slightly inclined relative to a vertical direction.

Le mât 104 est fixé au porteur 102 par des moyens de maintien 106 qui permettent en outre de modifier l'inclinaison du mât, par exemple afin d'adapter l'excavation à la structure du sol.The mast 104 is fixed to the carrier 102 by holding means 106 which furthermore make it possible to modify the inclination of the mast, for example in order to adapt the excavation to the soil structure.

Comme on le voit sur la figure 2 , ce mât comporte une extrémité inférieure 104a et une extrémité supérieure 104b, l'extrémité inférieure 104b étant disposée à quelques mètres au dessus de la surface du sol S. As we see on the figure 2 , This pole has a lower end 104a and upper end 104b, the lower end 104b is disposed a few meters above the ground surface S.

Conformément à l'invention, la machine d'excavation 100 comporte en outre une barre longitudinale 108, ayant la structure d'une poutre de longueur fixe, qui s'étend selon une direction longitudinale D2, entre une extrémité inférieure 108a et une extrémité supérieure 108b. According to the invention, the excavating machine 100 further comprises a longitudinal bar 108, having the structure of a beam of fixed length, which extends in a longitudinal direction D2, between a lower end 108a and an upper end 108b.

La barre 108 porte à son extrémité inférieure 108a deux outils de fraisage rotatifs 110,112. Ces deux outils s'étendent selon deux axes A1, A2 parallèles et distincts. Comme on le voit sur la figure 2 , ces deux axes A1, A2 sont perpendiculaires à la direction longitudinale D2 de la barre 108 et également orthogonaux à la tranchée que l'on souhaite réaliser. Dans cet exemple, les deux axes A1 A2 sont contenus dans un même plan qui est sensiblement parallèle à la surface du sol S. De plus, la direction longitudinale D2 de la barre 108 est sensiblement parallèle à la direction longitudinale D1 du mât 104. The bar 108 carries at its lower end 108a two rotary milling tools 110, 112. These two tools extend along two parallel axes A1 , A2 and distinct. As we see on the figure 2 , These two axes A1, A2 are perpendicular to the longitudinal direction D2 of the rod 108 and also orthogonal to the trench that is desired. In this example, the two axes A1 A2 are contained in the same plane which is substantially parallel to the surface of the ground S. In addition, the longitudinal direction D2 of the bar 108 is substantially parallel to the longitudinal direction D1 of the mast 104.

Par ailleurs, chaque outil de fraisage 110,112 comporte deux tambours cylindriques coaxiaux 110a,110b,112a,112b qui s'étendent symétriquement de part et d'autre de l'extrémité inférieure 108a de la barre 108, et qui présentent des surfaces périphériques extérieures d'où s'étendent radialement des dents de coupe (non représentées ici).Moreover, each milling tool 110, 112 comprises two coaxial cylindrical drums 110a, 110b, 112a, 112b which extend symmetrically on either side of the lower end 108a of the bar 108, and which have outer peripheral surfaces of where radially extending cutting teeth (not shown here).

On précise que ces dents de coupe sont du même type que celles de l'art antérieur. De même, comme dans l'art antérieur de la figure 1 , ces tambours sont contrarotatifs. Dans cet exemple, l'épaisseur axiale de chacun des outils de fraisage est de l'ordre de 500 mm, grâce à quoi l'invention permet notamment de réaliser des tranchées de faible épaisseur.It is specified that these cutting teeth are of the same type as those of the prior art. Similarly, as in the prior art of the figure 1 These drums are counter. In this example, the axial thickness of each of the milling tools is of the order of 500 mm, whereby the invention makes it possible in particular to make trenches of small thickness.

De manière connue en soi, les outils de fraisage 110,112 sont entrainés en rotation par deux moteurs hydrauliques 150 qui sont logés à l'intérieur des tambours 110a, 110b, 112a,112b, ces moteurs étant fixés à l'extrémité inférieure 108a de la barre 108 par le biais de plaques de support 113. A cet effet, on pourra utiliser la technologie de motorisation divulguée dans EP 0 262 050 .In a manner known per se, the milling tools 110, 112 are rotated by two hydraulic motors 150 which are housed inside the drums 110a, 110b, 112a, 112b, these motors being fixed to the lower end 108a of the bar. 108 by means of support plates 113. For this purpose, it will be possible to use the motorization technology disclosed in FIG. EP 0 262 050 .

A l'aide de la figure 4 , on comprend par ailleurs que les tambours de chacun des outils de fraisage sont symétriques par rapport à un plan de symétrie orthogonal aux axes de rotation des outils de fraisage.Using the figure 4 it is also understood that the drums of each of the milling tools are symmetrical with respect to a plane of symmetry orthogonal to the axes of rotation of the milling tools.

On précise également que les axes de rotation A1 et A2 sont fixes l'un par rapport à l'autre de telle manière que la tranchée excavée présente une géométrie rectangulaire.It is also specified that the axes of rotation A1 and A2 are fixed relative to each other so that the excavated trench has a rectangular geometry.

Comme on le comprend à l'aide des figures 2 et 3 , lors de l'opération d'excavation, la barre 108 est déplacée selon la direction longitudinale D1 du mât 104. Pour ce faire, la machine d'excavation 100 comporte en outre un chariot 114 qui est monté coulissant le long du mât, selon sa direction longitudinale D1. Des moyens de déplacement (non représentées ici) permettent de déplacer le chariot 114 le long du mât 104 vers l'une ou l'autre de ses extrémités.As we understand it with the help of Figures 2 and 3 During the excavating operation, the bar 108 is moved in the longitudinal direction D1 of the mast 104. To do this, the excavating machine 100 further includes a carriage 114 which is slidably mounted along the mast, as its longitudinal direction D1. Displacement means (not shown here) make it possible to move the carriage 114 along the mast 104 towards one or the other of its ends.

Ce chariot 114 est fixé à la barre 108 par des moyens de maintien 116 disposés sur le chariot qui peuvent éventuellement être désaccouplés de la barre lors des opérations de maintenance ou de démontage de la machine.This carriage 114 is fixed to the bar 108 by holding means 116 disposed on the carriage which may optionally be uncoupled from the bar during maintenance or dismantling of the machine.

Bien évidemment, lors du fonctionnement de la machine d'excavation, les moyens de maintien 116 sont solidarisés à la barre 108. Of course, during operation of the excavating machine, the holding means 116 are secured to the bar 108.

On comprend donc que le déplacement du chariot le long du mât 104 entraîne le déplacement de la barre 108 selon la direction longitudinale D1. It is therefore understood that the movement of the carriage along the mast 104 causes the bar 108 to move in the longitudinal direction D1.

Par ailleurs, l'extrémité inférieure 104a du mât comporte des moyens de guidage en translation 118 de la barre 108. De manière préférentielle, ces moyens de guidage enserrent la barre de sorte que cette dernière est libre de coulisser au travers desdits moyens de guidage.Furthermore, the lower end 104a of the mast comprises translation guide means 118 of the bar 108. Preferably, these guide means grip the bar so that the latter is free to slide through said guide means.

Sur la figure 3 , on a illustré la machine d'excavation 100 selon l'invention lors d'une opération d'excavation. Les outils de fraisage 110,112 étant mis en rotation, le chariot 114 est déplacé vers l'extrémité inférieure 104a du mât 104 tout en exerçant une force de poussée descendante F sur la barre 108, et donc sur les dents de coupe. En l'espèce, l'intensité de cette force de poussée F est de l'ordre de 30 tonnes, de manière à pouvoir excaver le sol S. On the figure 3 There is illustrated the excavating machine 100 according to the invention during an excavating operation. The milling tools 110, 112 being rotated, the carriage 114 is moved towards the lower end 104a of the mast 104 while exerting a downward thrust force F on the bar 108, and thus on the cutting teeth. In this case, the intensity of this thrust force F is of the order of 30 tons, so as to excavate the ground S.

La machine d'excavation 100 comporte par ailleurs des moyens de pompage 120 disposés à l'extrémité inférieure 108a de la barre 108, ces moyens de pompage étant destinés à aspirer les débris de sol excavés par les outils de fraisage 110,112. The excavating machine 100 further comprises pumping means 120 disposed at the lower end 108a of the bar 108, these pumping means being intended to suck the soil debris excavated by the milling tools 110, 112.

Ces moyens de pompage 120, mieux visibles sur la figure 4 , comportent en l'espèce deux pompes 122,124, de préférence de type centrifuge à motorisation hydraulique, qui sont disposées de part et d'autre de l'extrémité inférieure 108a de la barre 108, au dessus des outils de fraisage 110,112, entre deux plans orthogonaux aux axes A1, A2 des outils de fraisage et passant par les extrémités axiales des outils de fraisage. Pour autant et sans sortir du cadre de la présente invention, il serait possible de ne prévoir qu'une seule pompe.These pumping means 120, better visible on the figure 4 , comprise in this case two pumps 122,124, preferably centrifugal type with hydraulic drive, which are arranged on either side of the lower end 108a of the bar 108, above the milling tools 110,112, between two planes orthogonal to the A1 axes , A2 milling tools and passing through the axial ends of the milling tools. However, and without departing from the scope of the present invention, it would be possible to provide only one pump.

Ces pompes sont ici logées dans deux caissons 126,128 dont l'épaisseur, considérée selon une direction parallèles aux axes des outils de fraisage, est inférieure à l'épaisseur de chacun des outils de fraisage, en conséquence de quoi, les pompes 122,124, et a fortiori leurs caissons, ne gênent pas les outils de fraisage lors de l'opération d'excavation.These pumps are here housed in two boxes 126,128 whose thickness, considered in a direction parallel to the axes of the milling tools, is less than the thickness of each of the milling tools, as a result of which, the pumps 122,124, and especially their caissons, do not interfere with the milling tools during the excavation operation.

Chacune des pompes 122,124 est munie d'une buse d'aspiration 130 par laquelle entrent les débris de sol.Each of the pumps 122, 124 is provided with a suction nozzle 130 through which soil debris enters.

Conformément à l'invention, les pompes 122,124 sont connectées à l'extrémité inférieure 132a, d'une conduite de refoulement 132. Comme on le voit sur la figure 4 , la conduite de refoulement 132 est essentiellement logée à l'intérieur de la barre 108 dont l'intérieur est creux. Plus précisément, la conduite de refoulement présente une première portion 132' qui s'étend selon la direction longitudinale D2 de la barre entre son extrémité inférieure 108a et son extrémité supérieure 108b, la conduite de refoulement 132 sortant de la barre 108 par son extrémité supérieure 108b. La conduite est ensuite reliée à un boitier de connexion (non représenté ici) par une deuxième portion 132" de conduite, ce boitier de connexion étant fixé au mât 104. Enfin, dans cet exemple, la troisième portion de conduite 132"' est fixée au boitier de connexion et se termine par une bouche de sortie qui débouche dans un lieu de stockage et/ou de traitement des débris.In accordance with the invention, the pumps 122,124 are connected to the lower end 132a of a discharge pipe 132. As can be seen in FIG. figure 4 , the discharge pipe 132 is essentially housed inside the bar 108 whose interior is hollow. More specifically, the discharge pipe has a first portion 132 ' extending in the longitudinal direction D2 of the bar between its lower end 108a and its upper end 108b, the discharge pipe 132 coming out of the bar 108 by its upper end. 108b. The pipe is then connected to a connection box (not represented here) by a second pipe portion 132 " , this connection box being fixed to the mast 104. Finally, in this example, the third pipe portion 132"' is fixed to the connection box and ends with an outlet mouth that leads to a storage location and / or debris treatment.

Par ailleurs, les moteurs hydrauliques 150 destinés à entrainer les outils de fraisage en rotation, ainsi que les pompes à motorisation hydraulique 122,124 sont alimentés en énergie hydraulique par des conduites hydrauliques 160 qui s'étendent dans la barre aux côtés de la (ou des) conduite de refoulement 132. Autrement dit, les conduites hydrauliques 160 suivent essentiellement le même chemin que la conduite de refoulement 132. De plus, les conduites hydrauliques sont connectées à une source hydraulique disposée sur ou à proximité du porteur 102. Furthermore, the hydraulic motors 150 for driving the rotary milling tools, as well as the hydraulically actuated pumps 122, 124 are supplied with hydraulic energy by hydraulic lines 160 which extend in the bar alongside the (or) 132. In other words, the hydraulic lines 160 follow essentially the same path as the discharge line 132. In addition, the hydraulic lines are connected to a hydraulic source disposed on or near the carrier 102.

On précise enfin que des canaux hydrauliques pour l'alimentation des deux moteurs hydrauliques disposés dans les paires de tambours 110a,110b,112a,112b, sont ménagés préférentiellement à l'intérieur des plaques de support 113, à l'instar du dispositif de EP 0 262 050 .It is finally stated that hydraulic channels for feeding the two hydraulic motors arranged in the pairs of drums 110a, 110b, 112a, 112b are preferentially formed inside the support plates 113, like the device of EP 0 262 050 .

Claims (13)

  1. A soil excavation machine of the cutter type (100) for producing rectangular panels, characterized in that it comprises:
    - a mast (104) having a longitudinal direction (D1),
    - a longitudinal bar (108) with a fixed length which has a lower end (108a) provided with two cutting tools (110, 112) with parallel and distinct axes (A1, A2), said axes being fixed with respect to one another, the two cutting tools extending on either side of the lower end of the bar,
    - hydraulic motor means (150) for driving the cutting tools (110, 112) in rotation, said hydraulic motor means being supplied by hydraulic pipes which are housed at least in part inside the longitudinal bar (108),
    - a carriage (114), sliding in the longitudinal direction (D1) of the mast, said carriage being intended to exert a downward thrust force (F) on the bar in the longitudinal direction of the mast, and
    - pumping means (122, 124) disposed at the lower end of the bar and intended to aspire the soil debris excavated by the cut cutting tools.
  2. The soil excavation machine of the cutter type (100) according to claim 1, characterized in that it further includes at least one discharge pipe (132) connected to the pumping means.
  3. The soil excavation machine of the cutter type (100) according to claim 2, characterized in that said at least one discharge pipe (132) comprises a first portion (132') connecting the pumping means to the upper end of the bar, a second portion (132") connecting the upper end of the bar to a connection box attached to the mast, and a third portion (132"') connected to the connection box (136).
  4. The soil excavation machine of the cutter type (100) according to claim 2 or 3, characterized in that the discharge pipe (132) is housed at least in part inside the bar (108).
  5. The soil excavation machine of the cutter type (100) according to any one of claims 1 to 4, characterized in that the pumping means include two pumps (122, 124) disposed on either side of the lower end of the bar, above the cutting tools.
  6. The soil excavation machine of the cutter type (100) according to any one of claims 1 to 5, characterized in that the thickness of each of the cutting tools (110, 112), considered in a direction parallel to their axes, is comprised between 400 and 600 mm.
  7. The soil excavation machine of the cutter type (100) according to any one of claims 1 to 6, characterized in that, considered in a direction orthogonal to the longitudinal direction of the bar and to a direction parallel to the axes of the cutting tools, the bulk of the cutting tools (122, 124) is substantially greater than the width of the bar.
  8. The soil excavation machine of the cutter type (100) according to any one of claims 1 to 7, characterized in that the pumping means (122, 124) are dismountable.
  9. The soil excavation machine of the cutter type according to any one of claims 1 to 8, characterized in that the lower end (104a) of the mast includes means (118) for guiding the bar (108) in translation.
  10. The soil excavation machine of the cutter type according to any one of claims 1 to 9, characterized in that the cutting tools (110, 112) include rotating drums (110a, 110b, 112a, 112b) inside which are housed the hydraulic motor means (150).
  11. A method for excavating a wall in the soil (S) using an excavation machine of the cutter type (100) according to any one of claims 1 to 10, characterized in that, during the excavation of the wall, the carriage (114) exerts a downward thrust force (F) on the bar (108).
  12. The soil excavation method according to claim 11, wherein the intensity of the thrust force (F) is comprised between 15 and 50 tons.
  13. Use of the excavation machine (100) according to any one of claims 1 to 10 to form a rectangular panel in a soil.
EP10723203.5A 2009-04-10 2010-04-06 Soil excavation machine of the mill type provided with a movable carriage Active EP2417304B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0952407A FR2944299B1 (en) 2009-04-10 2009-04-10 MILLING MACHINE EXCAVATING THE STRAWBERRY TYPE PROVIDED WITH A MOBILE TROLLEY
PCT/FR2010/050652 WO2010116081A1 (en) 2009-04-10 2010-04-06 Soil excavation machine of the mill type provided with a movable carriage

Publications (2)

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EP2417304A1 EP2417304A1 (en) 2012-02-15
EP2417304B1 true EP2417304B1 (en) 2018-06-06

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EP10723203.5A Active EP2417304B1 (en) 2009-04-10 2010-04-06 Soil excavation machine of the mill type provided with a movable carriage

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EP (1) EP2417304B1 (en)
FR (1) FR2944299B1 (en)
WO (1) WO2010116081A1 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102017112418A1 (en) * 2017-06-06 2018-12-06 Liebherr-Werk Nenzing Gmbh Work machine with an attachment, in particular a trench cutter, and attachment, in particular trench cutter

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DE1634262B1 (en) 1966-04-09 1970-09-24 Bade & Co Gmbh Milling tool for making slots for slot walls
US3848685A (en) 1971-12-31 1974-11-19 Takenaka Komuten Co Mud removing system by means of an excavator and an apparatus therefor
EP0262050A1 (en) 1986-09-26 1988-03-30 SOLETANCHE Société Anonyme dite: Digging device for earthmovingmachine used for digging trenches into the ground
EP0553378A1 (en) 1992-01-30 1993-08-04 Hochtief Aktiengesellschaft Vorm. Gebr. Helfmann Device for making a slot in the soil during the construction of a sealing or protecting wall
JPH08302670A (en) 1995-05-01 1996-11-19 Takenaka Komuten Co Ltd Method and device for improvement of ground with horizontal cutter in working with large depth
US20040037652A1 (en) 2002-08-21 2004-02-26 Ludwig Schmidmaier Boring appliance
US20040234345A1 (en) 2003-02-27 2004-11-25 Maximilian Arzberger Method for making a trench wall in the ground, trench wall cutter and trench wall cutting device
EP1626127A1 (en) 2004-08-10 2006-02-15 BAUER Maschinen GmbH Milling apparatus and method for obtaining a milled hole
EP1630297A1 (en) 2004-08-20 2006-03-01 BAUER Maschinen GmbH Method of making concrete underground walls and device therefor
EP1746213A1 (en) 2005-07-21 2007-01-24 Compagnie du Sol Device for making a trenchwall by soil mixing

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EP1580398B1 (en) * 2004-03-23 2012-01-18 BAUER Maschinen GmbH Apparatus and method for subsoil construction
ES2293142T3 (en) * 2004-09-01 2008-03-16 Bauer Maschinen Gmbh WALL SCREEN IN THE FLOOR AND METHOD FOR YOUR PRODUCTION.

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1634262B1 (en) 1966-04-09 1970-09-24 Bade & Co Gmbh Milling tool for making slots for slot walls
US3848685A (en) 1971-12-31 1974-11-19 Takenaka Komuten Co Mud removing system by means of an excavator and an apparatus therefor
EP0262050A1 (en) 1986-09-26 1988-03-30 SOLETANCHE Société Anonyme dite: Digging device for earthmovingmachine used for digging trenches into the ground
EP0553378A1 (en) 1992-01-30 1993-08-04 Hochtief Aktiengesellschaft Vorm. Gebr. Helfmann Device for making a slot in the soil during the construction of a sealing or protecting wall
JPH08302670A (en) 1995-05-01 1996-11-19 Takenaka Komuten Co Ltd Method and device for improvement of ground with horizontal cutter in working with large depth
US20040037652A1 (en) 2002-08-21 2004-02-26 Ludwig Schmidmaier Boring appliance
US20040234345A1 (en) 2003-02-27 2004-11-25 Maximilian Arzberger Method for making a trench wall in the ground, trench wall cutter and trench wall cutting device
EP1626127A1 (en) 2004-08-10 2006-02-15 BAUER Maschinen GmbH Milling apparatus and method for obtaining a milled hole
EP1630297A1 (en) 2004-08-20 2006-03-01 BAUER Maschinen GmbH Method of making concrete underground walls and device therefor
EP1746213A1 (en) 2005-07-21 2007-01-24 Compagnie du Sol Device for making a trenchwall by soil mixing

Also Published As

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WO2010116081A1 (en) 2010-10-14
FR2944299B1 (en) 2016-08-26
FR2944299A1 (en) 2010-10-15
EP2417304A1 (en) 2012-02-15

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