EP0802286A2 - Drilling process to obtain a trenchwall with enlarged base in the ground, apparatus for performing the method, and trenchwall thus obtained - Google Patents

Drilling process to obtain a trenchwall with enlarged base in the ground, apparatus for performing the method, and trenchwall thus obtained Download PDF

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Publication number
EP0802286A2
EP0802286A2 EP97400835A EP97400835A EP0802286A2 EP 0802286 A2 EP0802286 A2 EP 0802286A2 EP 97400835 A EP97400835 A EP 97400835A EP 97400835 A EP97400835 A EP 97400835A EP 0802286 A2 EP0802286 A2 EP 0802286A2
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EP
European Patent Office
Prior art keywords
milling drums
chassis
drums
ground
borehole
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Withdrawn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
EP97400835A
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German (de)
French (fr)
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EP0802286A3 (en
Inventor
Philippe Lefort
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Compagnie du Sol SARL
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Compagnie du Sol SARL
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Publication date
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Publication of EP0802286A2 publication Critical patent/EP0802286A2/en
Publication of EP0802286A3 publication Critical patent/EP0802286A3/en
Withdrawn legal-status Critical Current

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    • 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
    • E02D17/06—Foundation trenches ditches or narrow shafts
    • 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 a drilling method for producing an enlarged base bar in the ground, an apparatus for its implementation and the bar thus obtained.
  • bars are foundation supports of substantially rectangular section.
  • Drilling rigs of the type are already known comprising a chassis provided, at its lower part, with milling drums located in the extension of the chassis and driven in rotation to disintegrate the ground as the apparatus sinks into the ground.
  • such an apparatus When in use, such an apparatus is suspended from a lifting device and in particular makes it possible to dig boreholes in order to make bars there by pouring concrete into these boreholes.
  • the present invention aims to propose a drilling method which implements such an apparatus and makes it possible to obtain a bar having high working rates, both in compression and in traction.
  • the subject of the present invention is a method for digging a borehole in the ground in order to produce a bar, according to which a drilling rig is lowered into the ground, comprising a chassis provided, at its lower part, with rotary milling drums, parallel axes of rotation, located in the extension of the chassis, said milling drums having the function of disintegrating the ground as the device is lowered into the ground, characterized in that, when the device has reached a predetermined depth, the milling drums are oriented on one side of the chassis by pivoting about a substantially horizontal pivot axis, perpendicular to the axes of rotation of the milling drums and located in the vicinity of their upper parts, while continuing to descend the device, then the device is raised to said predetermined depth while bringing the milling drums in line with the chassis.
  • the method according to the invention allows for lateral enlargements in the drilling, generally vertical, in which concrete is subsequently poured to obtain the bar.
  • the milling drums are oriented on the other side of the chassis, while continuing to lower the device, then the device is raised to said predetermined depth, while bringing the milling drums in line with the chassis.
  • the descent of the device can be continued while keeping the milling drums in line with the chassis.
  • lateral enlargements can be made at different depths of the borehole.
  • the apparatus is lowered into the ground with its drums inclined over a distance which is at most equal to the height of the apparatus, so that the upper part of the chassis always remains at the inside the straight, and generally vertical, part of the borehole.
  • the present invention also relates to a drilling apparatus allowing the implementation of the method described above.
  • This device is characterized by the fact that its milling drums are capable of being pivoted about a substantially horizontal pivot axis, perpendicular to the axes of rotation of the milling drums and located in the vicinity of their upper parts, so as to be able to exceed on either side of the chassis.
  • the angular movement of the milling drums relative to the chassis is greater than 4 ° and preferably equal to approximately 8 °.
  • - the cutting width of the milling drums, taken perpendicular to their pivot axis, is greater than the width of the chassis, so as to allow the deflection of the bottom of the chassis when the device descends with its milling drums inclined to one side of the chassis.
  • the device comprises sensors making it possible to measure the inclination of the milling drums relative to the chassis.
  • the present invention also relates to a bar comprising at least one lateral projection, obtained by pouring concrete in a borehole produced by implementing the method described above.
  • the drilling rig 1 described in FIG. 1 comprises a chassis 2 suspended by a block 3 from a lifting device (not shown) and provided at its lower part with two pairs of milling drums 4 rotated in the direction indicated by arrows 5, around axes of rotation 8 parallel to each other.
  • the milling drums are supported by a support plate 6, itself articulated on the chassis 2 around an axis 7, substantially horizontal, which is perpendicular to the axes of rotation 8 of the drums 4 and is located in the vicinity of their parts. higher.
  • the milling drums are located in the extension of the chassis 2.
  • the support plate 6 has an angular movement with respect to the chassis of approximately 8 °.
  • Cylinders 9 allow the angular positioning of the support plate relative to the chassis and sensors 10 make it possible to measure the inclination of said support plate, that is to say, milling drums, with respect to the chassis.
  • FIGS. 2 to 5 various stages in the production of a borehole are shown using the apparatus of FIG.
  • the apparatus 1 is lowered into the ground in a substantially vertical direction while keeping the milling drums 4 in the extension of the chassis 2, as shown in FIG. 2.
  • the milling drums 4 are oriented on one side of the chassis by rotating them around the axis 7.
  • the apparatus then begins to progress with its inclined drums 4 while the chassis 2 is still located in the vertical part of the borehole, as can be seen in FIG. 3.
  • a lateral widening 14 is thus hollowed out by the milling drums 4 .
  • chassis has a width less than that of the drums 4 allows it to deviate in the vertical part of the borehole following the drums in the widening 14, while the apparatus continues to descend.
  • the device When the device has reached the position shown in Figure 4, it is reassembled while replacing the milling drums in the extension of the chassis. The device then returns to its position shown in FIG. 2.
  • the dimensions of the widening thus dug can be 3 m high (H) and 1.80 m wide at its base (B) for drilling 80 cm wide (1) in its part current.
  • the milling drums are replaced in the extension of the chassis and the progression of the chassis is continued towards the down to a second depth at which the operations described above are repeated.
  • lateral enlargements 17 are made on one side of the borehole and staggered, that is to say on one side of the borehole at a first depth and on the opposite side to a second depth.

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  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Paleontology (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Earth Drilling (AREA)
  • Pit Excavations, Shoring, Fill Or Stabilisation Of Slopes (AREA)

Abstract

The implement has a cross bar on which the work head is mounted. The latter has a frame (2) with, at its lower end, cutting discs (4) rotating around parallel axes. The cutting disc drums segregate the soil dependent on how far the implement is lowered into the soil. When the implement reaches a set depth the drums on one side are oriented by pivoted around a pivot axis (7) which is horizontal perpendicular to the axes of rotation of the drums and situated adjacent to their upper ends. With continued descent of the drums, followed by lifting the implement up to the set depth and stowage of the implement in an extension of the frame. After raising of the implements to the set depth, the drums on the other side continue to descend. Advantage - Improved contact of implement with soil.

Description

La présente invention concerne un procédé de forage pour réaliser une barrette à base élargie dans le sol, un appareil pour sa mise en oeuvre et la barrette ainsi obtenue.The present invention relates to a drilling method for producing an enlarged base bar in the ground, an apparatus for its implementation and the bar thus obtained.

On rappelle que des barrettes sont des appuis de fondation de section sensiblement rectangulaire.It is recalled that bars are foundation supports of substantially rectangular section.

On connaît déjà des appareils de forage du type comportant un châssis muni, à sa partie inférieure, de tambours de fraisage situés dans le prolongement du châssis et entraînés en rotation pour désagréger le terrain à mesure que l'appareil s'enfonce dans le sol.Drilling rigs of the type are already known comprising a chassis provided, at its lower part, with milling drums located in the extension of the chassis and driven in rotation to disintegrate the ground as the apparatus sinks into the ground.

Lors de son utilisation, un tel appareil est suspendu à un engin de levage et permet notamment de creuser des forages pour y réaliser des barrettes en coulant du béton dans ces forages.When in use, such an apparatus is suspended from a lifting device and in particular makes it possible to dig boreholes in order to make bars there by pouring concrete into these boreholes.

La présente invention vise à proposer un procédé de forage qui met en oeuvre un tel appareil et permet d'obtenir une barrette présentant des taux de travail élevés, à la fois en compression et en traction.The present invention aims to propose a drilling method which implements such an apparatus and makes it possible to obtain a bar having high working rates, both in compression and in traction.

La présente invention a pour objet un procédé pour creuser un forage dans le sol pour y réaliser une barrette, selon lequel on descend dans le sol un appareil de forage comportant un châssis muni, à sa partie inférieure, de tambours de fraisage rotatifs, d'axes de rotation parallèles, situés dans le prolongement du châssis, lesdits tambours de fraisage ayant pour fonction de désagréger le terrain à mesure que l'on descend l'appareil dans le sol, caractérisé par le fait que, lorsque l'appareil a atteint une profondeur prédéterminée, on oriente les tambours de fraisage d'un coté du châssis par pivotement autour d'un axe de pivotement sensiblement horizontal, perpendiculaire aux axes de rotation des tambours de fraisage et situé au voisinage de leurs parties supérieures, tout en continuant à descendre l'appareil, puis on remonte l'appareil jusqu'à ladite profondeur prédéterminée tout en ramenant les tambours de fraisage dans le prolongement du châssis.The subject of the present invention is a method for digging a borehole in the ground in order to produce a bar, according to which a drilling rig is lowered into the ground, comprising a chassis provided, at its lower part, with rotary milling drums, parallel axes of rotation, located in the extension of the chassis, said milling drums having the function of disintegrating the ground as the device is lowered into the ground, characterized in that, when the device has reached a predetermined depth, the milling drums are oriented on one side of the chassis by pivoting about a substantially horizontal pivot axis, perpendicular to the axes of rotation of the milling drums and located in the vicinity of their upper parts, while continuing to descend the device, then the device is raised to said predetermined depth while bringing the milling drums in line with the chassis.

On comprend que le procédé selon l'invention permet de réaliser, des élargissements latéraux dans le forage, généralement vertical, dans lequel on coule ultérieurement du béton pour obtenir la barrette.It is understood that the method according to the invention allows for lateral enlargements in the drilling, generally vertical, in which concrete is subsequently poured to obtain the bar.

De tels élargissement latéraux conduisent à la formation d'excroissances latérales dans la barrette, excroissances qui permettent d'augmenter ses taux de travail, en compression et en traction, du fait que la surface d'appui de la barrette dans le terrain est augmentée.Such lateral widening leads to the formation of lateral protuberances in the bar, protuberances which make it possible to increase its working rates, in compression and in traction, because the bearing surface of the bar in the ground is increased.

Dans un mode de mise en oeuvre particulier de l'invention, après avoir remonté l'appareil jusqu'à ladite profondeur prédéterminée, on oriente les tambours de fraisage de l'autre côté du châssis, tout en continuant à descendre l'appareil, puis on remonte l'appareil jusqu'à ladite profondeur prédéterminée, tout en ramenant les tambours de fraisage dans le prolongement du châssis.In a particular embodiment of the invention, after having raised the device to said predetermined depth, the milling drums are oriented on the other side of the chassis, while continuing to lower the device, then the device is raised to said predetermined depth, while bringing the milling drums in line with the chassis.

Dans ce mode de mise en oeuvre, on réalise deux élargissements latéraux sensiblement symétriques à une même profondeur du forage.In this embodiment, two substantially symmetrical lateral enlargements are made at the same drilling depth.

Après avoir réalisé un ou deux élargissements latéraux à une même profondeur du forage, on peut poursuivre la descente de l'appareil en conservant les tambours de fraisage dans le prolongement du châssis.After having made one or two lateral widenings at the same depth of the borehole, the descent of the device can be continued while keeping the milling drums in line with the chassis.

Ainsi, on peut réaliser des élargissements latéraux à différentes profondeurs du forage.Thus, lateral enlargements can be made at different depths of the borehole.

En particulier, on peut creuser une succession d'élargissements symétriques ou une succession d'élargissements dissymétriques, en alternant le côté vers lequel on oriente les tambours de fraisage.In particular, it is possible to dig a succession of symmetrical enlargements or a succession of asymmetrical enlargements, by alternating the side towards which the milling drums are oriented.

De préférence, pour creuser les élargissement latéraux, on descend l'appareil dans le sol avec ses tambours inclinés sur une distance qui est au maximum égale à la hauteur de l'appareil, de manière que la partie supérieure du châssis reste toujours à l'intérieur de la partie rectiligne, et généralement verticale, du forage.Preferably, to dig the lateral widenings, the apparatus is lowered into the ground with its drums inclined over a distance which is at most equal to the height of the apparatus, so that the upper part of the chassis always remains at the inside the straight, and generally vertical, part of the borehole.

La présente invention a également pour objet un appareil de forage permettant la mise en oeuvre du procédé décrit ci-dessus.The present invention also relates to a drilling apparatus allowing the implementation of the method described above.

Cet appareil se caractérise par le fait que ses tambours de fraisage sont aptes à être pivotés autour d'un axe de pivotement sensiblement horizontal, perpendiculaire aux axes de rotation des tambours de fraisage et situé au voisinage de leurs parties supérieures, de manière à pouvoir dépasser d'un côté ou de l'autre du châssis.This device is characterized by the fact that its milling drums are capable of being pivoted about a substantially horizontal pivot axis, perpendicular to the axes of rotation of the milling drums and located in the vicinity of their upper parts, so as to be able to exceed on either side of the chassis.

Dans un mode de réalisation préféré de l'invention, le débattement angulaire des tambours de fraisage par rapport au châssis est supérieur à 4° et de préférence égal à environ 8°.In a preferred embodiment of the invention, the angular movement of the milling drums relative to the chassis is greater than 4 ° and preferably equal to approximately 8 °.

Dans un mode de réalisation préféré,- la largeur de coupe des tambours de fraisage, prise perpendiculairement à leur axe de pivotement, est supérieure à la largeur du châssis, de manière à permettre la déviation du bas du châssis lorsque l'appareil descend avec ses tambours de fraisage inclinés d'un côté du châssis.In a preferred embodiment, - the cutting width of the milling drums, taken perpendicular to their pivot axis, is greater than the width of the chassis, so as to allow the deflection of the bottom of the chassis when the device descends with its milling drums inclined to one side of the chassis.

Dans un mode de réalisation particulier de l'invention, l'appareil comprend des capteurs permettant de mesurer l'inclinaison des tambours de fraisage par rapport au châssis.In a particular embodiment of the invention, the device comprises sensors making it possible to measure the inclination of the milling drums relative to the chassis.

La présente invention a également pour objet une barrette comportant au moins une excroissance latérale, obtenue en coulant du béton dans un forage réalisé par mise en oeuvre du procédé décrit ci-dessus.The present invention also relates to a bar comprising at least one lateral projection, obtained by pouring concrete in a borehole produced by implementing the method described above.

Dans le but de mieux faire comprendre l'invention, on va en décrire maintenant, à titre non limitatif, des exemples de mise en oeuvre en référence au dessin annexé dans lequel :

  • la figure 1 représente en perspective un appareil de forage pour une mise en oeuvre de l'invention,
  • les figures 2 à 5 sont des vues en coupe d'un premier forage en cours de réalisation par mise en oeuvre de l'invention,
  • les figures 6 et 7 sont des vues en coupe de deux autres forages obtenus par mise en oeuvre de l'invention.
In order to better understand the invention, we will now describe, without limitation, examples of implementation with reference to the accompanying drawing in which:
  • FIG. 1 is a perspective view of a drilling device for implementing the invention,
  • FIGS. 2 to 5 are sectional views of a first borehole in progress by implementing the invention,
  • Figures 6 and 7 are sectional views of two other boreholes obtained by implementing the invention.

L'appareil de forage 1 décrit à la figure 1 comprend un châssis 2 suspendu par un moufle 3 à un engin de levage (non représenté) et muni à sa partie inférieure de deux paires de tambours de fraisage 4 entraînés en rotation dans le sens indiqué par les flèches 5, autour d'axes de rotation 8 parallèles entre eux.The drilling rig 1 described in FIG. 1 comprises a chassis 2 suspended by a block 3 from a lifting device (not shown) and provided at its lower part with two pairs of milling drums 4 rotated in the direction indicated by arrows 5, around axes of rotation 8 parallel to each other.

Les tambours de fraisage sont supportés par une plaque-support 6, elle-même articulée sur le châssis 2 autour d'un axe 7, sensiblement horizontal, qui est perpendiculaire aux axes de rotation 8 des tambours 4 et se situe au voisinage de leurs parties supérieures.The milling drums are supported by a support plate 6, itself articulated on the chassis 2 around an axis 7, substantially horizontal, which is perpendicular to the axes of rotation 8 of the drums 4 and is located in the vicinity of their parts. higher.

Dans la position représentée à la figure 1, les tambours de fraisage se situent dans le prolongement du châssis 2.In the position shown in FIG. 1, the milling drums are located in the extension of the chassis 2.

La plaque-support 6 présente un débattement angulaire par rapport au châssis d'environ 8°.The support plate 6 has an angular movement with respect to the chassis of approximately 8 °.

Des vérins 9 permettent le positionnement angulaire de la plaque-support par rapport au châssis et des capteurs 10 permettent de mesurer l'inclinaison du ladite plaque-support, c'est-à-dire, des tambours de fraisage, par rapport au châssis.Cylinders 9 allow the angular positioning of the support plate relative to the chassis and sensors 10 make it possible to measure the inclination of said support plate, that is to say, milling drums, with respect to the chassis.

Par ailleurs, pour déterminer l'orientation spatiale de l'appareil, différents niveaux 11 sont prévus sur le châssis et deux câblettes (non représentées) sont chacune tendue entre un point fixe (non représenté) de la surface du sol et un inclinomètre à deux directions 12 qui est solidaire du châssis 2 et protégé par une plaque 13.Furthermore, to determine the spatial orientation of the device, different levels 11 are provided on the chassis and two cables (not shown) are each stretched between a fixed point (not shown) on the ground surface and an inclinometer with two directions 12 which is integral with the chassis 2 and protected by a plate 13.

Sur les figures 2 à 5, on a représenté différentes étapes de la réalisation d'un forage grâce à l'appareil de la figure 1.In FIGS. 2 to 5, various stages in the production of a borehole are shown using the apparatus of FIG.

Dans un premier temps, on descend l'appareil 1 dans le sol selon une direction sensiblement verticale en conservant les tambours de fraisage 4 dans le prolongement du châssis 2, comme représenté à la figure 2.Firstly, the apparatus 1 is lowered into the ground in a substantially vertical direction while keeping the milling drums 4 in the extension of the chassis 2, as shown in FIG. 2.

A partir d'une profondeur prédéterminée, on oriente les tambours de fraisage 4 d'un côté du châssis en les faisant pivoter autour de l'axe 7.From a predetermined depth, the milling drums 4 are oriented on one side of the chassis by rotating them around the axis 7.

La descente de l'appareil se poursuit pendant cette inclinaison des tambours.The descent of the apparatus continues during this tilting of the drums.

L'appareil se met alors à progresser avec ses tambours 4 inclinés tandis que le châssis 2 se situe encore dans la partie verticale du forage, comme on le voit sur la figure 3. Un élargissement latéral 14 est ainsi creusé par les tambours de fraisage 4.The apparatus then begins to progress with its inclined drums 4 while the chassis 2 is still located in the vertical part of the borehole, as can be seen in FIG. 3. A lateral widening 14 is thus hollowed out by the milling drums 4 .

Le fait que le châssis présente une largeur inférieure à celle des tambours 4 lui permet de dévier dans la partie verticale du forage en suivant les tambours dans l'élargissement 14, tandis que l'appareil continue de descendre.The fact that the chassis has a width less than that of the drums 4 allows it to deviate in the vertical part of the borehole following the drums in the widening 14, while the apparatus continues to descend.

Lorsque l'appareil a atteint la position représentée à la figure 4, on le remonte tout en replaçant les tambours de fraisage dans le prolongement du châssis. L'appareil retrouve alors sa position représentée à la figure 2.When the device has reached the position shown in Figure 4, it is reassembled while replacing the milling drums in the extension of the chassis. The device then returns to its position shown in FIG. 2.

On répète les opérations ci-dessus en orientant cette fois les tambours de fraisage 4 de l'autre côté du châssis et l'on obtient la tranchée représentée à la figure 5.The above operations are repeated, this time orienting the milling drums 4 on the other side of the chassis and the trench shown in FIG. 5 is obtained.

A titre indicatif, les dimensions de l'élargissement ainsi creusé peuvent être de 3 m de haut (H) et de 1,80 m de large à sa base (B) pour un forage de 80 cm de large (1) dans sa partie courante.As an indication, the dimensions of the widening thus dug can be 3 m high (H) and 1.80 m wide at its base (B) for drilling 80 cm wide (1) in its part current.

Dans le mode de mise en oeuvre illustré à la figure 6, après avoir réalisé des élargissement latéraux symétriques 15 à une première profondeur du forage, on replace les tambours de fraisage dans le prolongement du châssis et l'on poursuit la progression du châssis vers le bas jusqu'à une deuxième profondeur à laquelle on réitère les opérations décrites ci-dessus.In the embodiment illustrated in FIG. 6, after having made symmetrical lateral enlargements 15 at a first depth of drilling, the milling drums are replaced in the extension of the chassis and the progression of the chassis is continued towards the down to a second depth at which the operations described above are repeated.

En répétant ces opérations, on obtient une succession d'élargissements latéraux symétriques 16.By repeating these operations, a succession of symmetrical lateral enlargements is obtained 16.

Dans l'autre mode de mise en oeuvre illustré à la figure 7, on réalise des élargissements latéraux 17 d'un seul côté du forage et en quinconce, c'est-à-dire, d'un côté du forage à une première profondeur et du côté opposé à une deuxième profondeur.In the other embodiment illustrated in FIG. 7, lateral enlargements 17 are made on one side of the borehole and staggered, that is to say on one side of the borehole at a first depth and on the opposite side to a second depth.

On peut bien entendu combiner plusieurs des modes de mise en oeuvre décrits ci-dessus pour obtenir des forages dans lesquels on réalise des barrettes présentant des taux de travail adaptés au terrain rencontré.It is of course possible to combine several of the modes of implementation described above to obtain boreholes in which bars are produced having working rates adapted to the terrain encountered.

Il est bien entendu que les modes de mise en oeuvre qui viennent d'être décrits ne présentent aucun caractère limitatif et qu'ils pourront recevoir toutes modifications désirables sans sortir pour cela du cadre de l'invention.It is understood that the modes of implementation which have just been described have no limiting character and that they can receive any desirable modification without departing from the scope of the invention.

Claims (9)

Procédé pour creuser un forage dans le sol pour y réaliser une barrette, selon lequel on descend dans le sol un appareil de forage (1) comportant un châssis (2) muni, à sa partie inférieure, de tambours de fraisage (4) rotatifs, d'axes de rotation parallèles, situés dans le prolongement du châssis (2), lesdits tambours de fraisage (4) ayant pour fonction de désagréger le terrain à mesure que l'on descend l'appareil dans le sol, caractérisé par le fait, que lorsque l'appareil a atteint une profondeur prédéterminée, on oriente les tambours de fraisage (4) d'un côté du châssis (2), par pivotement autour d'un axe de pivotement (7) sensiblement horizontal, perpendiculaire aux axes de rotation des tambours de fraisage (4) et situé au voisinage de leurs parties supérieures, tout en continuant à descendre l'appareil, puis on remonte l'appareil jusqu'à ladite profondeur déterminée tout en ramenant les tambours de fraisage (4) dans le prolongement du châssis (2).Method for digging a borehole in the ground to produce a bar thereon, according to which a drilling apparatus (1) is lowered into the ground comprising a chassis (2) provided, at its lower part, with rotary milling drums (4), parallel axes of rotation, located in the extension of the chassis (2), said milling drums (4) having the function of disaggregating the ground as the apparatus is lowered into the ground, characterized by the fact, that when the device has reached a predetermined depth, the milling drums (4) are oriented on one side of the frame (2), by pivoting around a pivot axis (7) substantially horizontal, perpendicular to the axes of rotation milling drums (4) and located in the vicinity of their upper parts, while continuing to lower the device, then the device is raised to said determined depth while returning the milling drums (4) in the extension of the chassis (2). Procédé selon la revendications 1, caractérisé par le fait qu'après avoir remonté l'appareil jusqu'à ladite profondeur prédéterminée, on oriente les tambours de fraisage (4) de l'autre côté du châssis (2) tout en continuant à descendre l'appareil, puis on remonte l'appareil jusqu'à ladite profondeur prédéterminée, tout en ramenant les tambours de fraisage (4) dans le prolongement du châssis (2).Method according to claim 1, characterized in that after having raised the device to said predetermined depth, the milling drums (4) are oriented on the other side of the frame (2) while continuing to descend l 'device, then the device is raised to said predetermined depth, while returning the milling drums (4) in the extension of the frame (2). Procédé selon l'une quelconque des revendications 1 et 2, caractérisé par le fait qu'après avoir réalisé un ou deux élargissements latéraux à une même profondeur du forage, en orientant les tambours de fraisage (4) d'un côté et/ou de l'autre côté du châssis (2), on poursuit la descente de l'appareil en conservant les tambours de fraisage (4) dans le prolongement du châssis (2).Method according to either of Claims 1 and 2, characterized in that, after having made one or two lateral enlargements at the same depth of the borehole, orienting the milling drums (4) to one side and / or on the other side of the chassis (2), the device is continued to descend, keeping the milling drums (4) in line with the chassis (2). Procédé selon la revendication 3, caractérisé par le fait que l'on réalise une succession d'élargissements latéraux à différentes profondeurs du forage.Method according to claim 3, characterized in that a succession of lateral enlargements is carried out at different depths of the borehole. Procédé selon l'une quelconque des revendications 1 à 4, caractérisé par le fait que, pour creuser un élargissement latéral, on descend l'appareil dans le sol avec ses tambours de fraisage (4) inclinés sur une distance qui est au maximum égale à la hauteur de l'appareil (1), de manière que la partie supérieure du châssis (2) reste toujours à l'intérieur de la partie rectiligne, et généralement verticale, du forage.Method according to any one of Claims 1 to 4, characterized in that, to dig a lateral widening, the apparatus is lowered into the ground with its milling drums (4) inclined over a distance which is at most equal to the height of the apparatus (1), so that the upper part of the chassis (2) always remains inside the straight, and generally vertical, part of the borehole. Appareil de forage pour la mise en oeuvre du procédé selon l'une quelconque des revendications 1 à 5, comportant un châssis (2) muni, à sa partie inférieure, de tambours de fraisage (4) rotatifs, d'axes de rotation (8) parallèles, situés dans le prolongement du châssis (2), lesdits tambours de fraisage (4) ayant pour fonction de désagréger le terrain à mesure que l'on descend l'appareil (1) dans le sol, caractérisé par le fait que lesdits tambours de fraisage (4) sont aptes à être pivotés autour d'un axe de pivotement (7) sensiblement horizontal, perpendiculaire à leurs axes de rotation (8) et situé au voisinage de leurs parties supérieures, de manière à dépasser d'un côté ou de l'autre du châssis (2).Drilling apparatus for carrying out the method according to any one of Claims 1 to 5, comprising a chassis (2) provided, at its lower part, with rotary milling drums (4), with axes of rotation (8) parallel, located in the extension of the chassis (2), said milling drums (4) having the function of disaggregating the ground as the device (1) is lowered into the ground, characterized by the fact that said milling drums (4) are able to be pivoted about a pivot axis (7) substantially horizontal, perpendicular to their axes of rotation (8) and located in the vicinity of their upper parts, so as to exceed d 'on one side or the other of the chassis (2). Appareil selon la revendication 6, caractérisé par le fait que le débattement angulaire des tambours de fraisage (4) par rapport au châssis (2) est supérieur à 4° et de préférence égal à environ 8°.Apparatus according to claim 6, characterized in that the angular movement of the milling drums (4) relative to the frame (2) is greater than 4 ° and preferably equal to approximately 8 °. Appareil selon l'une quelconque des revendications 6 et 7, caractérisé par le fait que la largeur de coupe des tambours de fraisage (4), prise perpendiculairement à leur axe de pivotement (7), est supérieure à la largeur du châssis (2).Apparatus according to either of Claims 6 and 7, characterized in that the cutting width of the milling drums (4), taken perpendicular to their pivot axis (7), is greater than the width of the frame (2) . Barrette obtenue en coulant du béton dans un forage réalisé par mise en oeuvre du procédé selon l'une quelconque des revendications 1 à 5.Bar obtained by pouring concrete in a borehole produced by implementing the method according to any one of claims 1 to 5.
EP97400835A 1996-04-19 1997-04-14 Drilling process to obtain a trenchwall with enlarged base in the ground, apparatus for performing the method, and trenchwall thus obtained Withdrawn EP0802286A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9604946 1996-04-19
FR9604946A FR2747704B1 (en) 1996-04-19 1996-04-19 DRILLING METHOD FOR REALIZING A BROAD BASED BAR IN THE GROUND, APPARATUS FOR IMPLEMENTING SAME AND BAR THUS OBTAINED

Publications (2)

Publication Number Publication Date
EP0802286A2 true EP0802286A2 (en) 1997-10-22
EP0802286A3 EP0802286A3 (en) 1997-11-05

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EP97400835A Withdrawn EP0802286A3 (en) 1996-04-19 1997-04-14 Drilling process to obtain a trenchwall with enlarged base in the ground, apparatus for performing the method, and trenchwall thus obtained

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EP (1) EP0802286A3 (en)
FR (1) FR2747704B1 (en)

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EP2378002A1 (en) * 2010-04-16 2011-10-19 BAUER Maschinen GmbH Machining device for producing vertical slits in the ground
US20240229404A9 (en) * 2021-03-23 2024-07-11 Bauer Maschinen Gmbh Measuring arrangement and removal device with a measuring arrangement

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EP1703023B1 (en) * 2005-03-18 2011-06-22 BAUER Maschinen GmbH Slit wall digging device with direction control system

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DE3602387C1 (en) * 1986-01-28 1987-06-04 Hochtief Ag Hoch Tiefbauten Device for introducing a substantially vertical bottom slot
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Cited By (6)

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Publication number Priority date Publication date Assignee Title
EP2378002A1 (en) * 2010-04-16 2011-10-19 BAUER Maschinen GmbH Machining device for producing vertical slits in the ground
AU2011201322B2 (en) * 2010-04-16 2012-12-20 Bauer Maschinen Gmbh Cutting device for producing vertically running trenches in the ground
RU2473740C2 (en) * 2010-04-16 2013-01-27 Бауэр Машинен Гмбх Milling plant for making vertical slots in soil
US8640364B2 (en) 2010-04-16 2014-02-04 Bauer Maschinen Gmbh Cutting device for producing vertically running trenches in the ground
US20240229404A9 (en) * 2021-03-23 2024-07-11 Bauer Maschinen Gmbh Measuring arrangement and removal device with a measuring arrangement
US12522997B2 (en) * 2021-03-23 2026-01-13 Bauer Maschinen Gmbh Measuring arrangement and removal device with a measuring arrangement

Also Published As

Publication number Publication date
FR2747704B1 (en) 1998-07-10
FR2747704A1 (en) 1997-10-24
EP0802286A3 (en) 1997-11-05

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