EP0663475A1 - Apparatus for forming piles of soil stabilised and compacted in situ - Google Patents

Apparatus for forming piles of soil stabilised and compacted in situ Download PDF

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Publication number
EP0663475A1
EP0663475A1 EP95400033A EP95400033A EP0663475A1 EP 0663475 A1 EP0663475 A1 EP 0663475A1 EP 95400033 A EP95400033 A EP 95400033A EP 95400033 A EP95400033 A EP 95400033A EP 0663475 A1 EP0663475 A1 EP 0663475A1
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EP
European Patent Office
Prior art keywords
augers
auger
shafts
axes
centered
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Granted
Application number
EP95400033A
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German (de)
French (fr)
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EP0663475B1 (en
Inventor
Jean-Claude Gessay
Alain Deniau
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Soletanche Bachy France
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SIF ENTREPRISE
Sondages Injections Forages SIF Enterprise Bachy
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    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
    • E02D5/18—Bulkheads or similar walls made solely of concrete in situ
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
    • E02D3/12—Consolidating by placing solidifying or pore-filling substances in the soil
    • E02D3/126—Consolidating by placing solidifying or pore-filling substances in the soil and mixing by rotating blades

Definitions

  • the invention relates to an improved device for the production in place of columns of stabilized and compacted soil.
  • EP-B-0 161 974 describes a process for the production in place of columns of stabilized and compacted soil. This method comprises a first phase consisting in driving into the ground a rotary drilling tool disintegrating the ground and mixing it with a filler material, and during which an upward movement is imparted to at least part of the disaggregated ground.
  • a device is used, as drilling tool, which comprises at least two parallel shafts, each shaft driving in rotation of an auger, each auger being provided at its end opposite the drive shaft with a disaggregating drilling head and the distance between the axes of the augers being less than the diameter of an auger, the shafts and barrels of the augers comprising a bore connected to a source of filler material and at least one orifice communicating with said bore being provided on the barrel of each auger for discharging er the filler material, the augers being of opposite pitch and being rotated in opposite directions and which further comprises means for reversing the direction of rotation of the augers, in that the first phase is carried out driving said device into the ground while discharging a filler material through said orifice so as to mix it with the disaggregated ground, and in that the second phase is carried out, after having reversed the direction of rotation of the augers,
  • EP-B-0 161 974 claims, moreover, a device suitable for implementing said method which comprises at least two augers, it specifically describes only one device with only two augers.
  • the object of the invention is precisely to provide such a device.
  • the invention relates to a device for producing columns of stabilized and compacted soil in place, of the type which comprises at least two parallel shafts, each shaft driving an auger in rotation, each auger being provided at its end opposite the shaft. for driving a disaggregating drilling head and the distance between the axes of the augers being less than the diameter of an auger, the shafts and barrels of the augers having a bore and at least one orifice communicating with said bore being provided on the barrel of each auger for discharging filler material, the augers being of opposite pitch and being rotated in opposite directions and which further comprises means for reversing the direction of rotation of the augers, characterized in that it includes an even number n , at least equal to 4, of augers and in that, seen in cross section, the axes of the augers are centered at the vertices of a regular polygon of n sides.
  • the device preferably comprises a single motor driving, by an appropriate gearbox, all the augers, this in order to synchronize the augers in rotation, which is essential given their mutual nesting, but it is not obviously not excluded from using several drive motors, if desired, if, moreover, provision is made for adequate synchronization means of the rotation of the augers.
  • Figures 1 and 2 are schematic views in elevation and in cross section (along line II-II) respectively, of an embodiment of the device according to the invention.
  • Figures 3 and 4 are schematic cross-sectional views, at the augers, of other embodiments of the device of the invention.
  • the device represented in FIGS. 1 and 2 comprises the following elements:
  • Each auger is provided at its free end with a disaggregating drilling head 3 adapted to the nature of the ground. It can be, for example, as illustrated, a helical head, or a knife.
  • the distance X between the adjacent axes of the augers is less than the diameter of the augers so that the turns of the adjacent augers are effectively engaged one in the other so as to ensure a movement or forced flow of the disaggregated ground 4 by the augers.
  • each auger also has a bore 5a which communicates with the bore of the corresponding drive shaft, thus making it possible to bring the filler material or binder, coming from a source (not shown), by dry or wet to openings 6 formed on the height of the barrel of each auger so as to ensure intimate mixing with the disaggregated soil.
  • the length of the augers is adapted to the type of terrain and is usually less than the depth of the column to be produced.
  • augers instead of having a continuous helical profile, could be discontinuous, that is to say be replaced by a plurality of spaced propellers.
  • a number of double bearings 7, depending on the depth of the column to be produced, are distributed over the height of the drive shafts and augers so as to maintain their parallelism.
  • the four shafts 1 are rotated by means of a gear reversing reduction device 8, itself connected to a motor 9, which drives them and the augers, rotating in opposite directions and at the same speed.
  • This motor-reduction unit 8-9 can be carried by a drilling machine (not shown) installed on the surface in line with the column to be produced, either by means of a slide on which it can move longitudinally either freely or by through a translation device. Alternatively, it can be suspended from the boom of a lifting device (crane or other). In the latter case, the weight of the device can be adapted so that it exerts the desired bearing force.
  • Figure 3 schematically illustrates a device similar to that of Figures 1 and 2 except that it has six augers 2 instead of four.
  • the shafts 1 of these augers are arranged so that, in cross section, their axes are centered at the vertices of an imaginary regular hexagon H (shown in dotted lines).
  • Figure 4 schematically illustrates a device similar to that of Figures 1 and 2 except that it has eight augers 2 instead of four.
  • the shafts 1 of these augers are arranged so that, in cross section, their axes are centered at the vertices of an imaginary regular octagon O (shown in dotted lines).
  • the improved device of the invention is used in the same way as the device described in EP-B-0 161 974 to which reference will be made for more details.
  • the latter is free from the defect presented by the device of EP-B-0 161 974 when it is used in soft ground, and recalled in the preamble of this description.

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  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Paleontology (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Agronomy & Crop Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Soil Sciences (AREA)
  • Soil Working Implements (AREA)
  • Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
  • Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
  • Earth Drilling (AREA)
  • Agricultural Machines (AREA)
  • Piles And Underground Anchors (AREA)
  • Bulkheads Adapted To Foundation Construction (AREA)

Abstract

The machine has two or more parallel shafts (1) equipped with rotary augers (2) with cutting heads (3) on their free ends, with the distance between the axes of the shafts smaller than the diameter of the augers. The shafts and augers have through channels (1a,5a) for delivering a fluid for mixing with the soil. The shafts and augers are in even numbers - at least four - and are situated, when viewed from above, at the corners of a regular polygon, such a hexagon or octagon. The machine is driven by a motor and reduction gear system (8,9) and is used e.g. suspended from a crane.

Description

L'invention concerne un dispositif perfectionné pour la réalisation en place de colonnes de sol stabilisé et compacté.The invention relates to an improved device for the production in place of columns of stabilized and compacted soil.

EP-B-0 161 974 décrit un procédé pour la réalisation en place de colonnes de sol stabilisé et compacté. Ce procédé comporte une première phase consistant à enfoncer dans le terrain un outil de forage rotatif désagrégeant le terrain et le mélangeant avec un matériau d'apport, et au cours de laquelle on imprime à au moins une partie du terrain désagrégé un mouvement ascendant à travers l'outil de forage, et une deuxième phase consistant à retirer l'outil de forage du terrain, et est caractérisé en ce qu'on utilise, comme outil de forage, un dispositif qui comprend au moins deux arbres parallèles, chaque arbre entraînant en rotation une tarière, chaque tarière étant munie à son extrémité opposée à l'arbre d'entraînement d'une tête de forage désagrégatrice et la distance entre les axes des tarières étant inférieure au diamètre d'une tarière, les arbres et les fûts des tarières comportant un alésage relié à une source de matériau d'apport et au moins un orifice communiquant avec ledit alésage étant prévu sur le fût de chaque tarière pour décharger le matériau d'apport, les tarières étant de pas opposés et étant entraînées en rotation en sens contraire et qui comprend, en outre, des moyens d'inversion du sens de rotation des tarières, en ce qu'on réalise la première phase en enfonçant dans le terrain ledit dispositif tout en déchargeant un matériau d'apport par ledit orifice de façon à le mélanger avec le terrain désagrégé, et en ce qu'on réalise la deuxième phase, après avoir inversé le sens de rotation des tarières, en exerçant un appui réglé sur ledit dispositif pendant qu'on le retire de façon à imprimer au terrain désagrégé mélangé au matériau d'apport, un mouvement descendant, tendant à le compacter, à travers ledit dispositif.EP-B-0 161 974 describes a process for the production in place of columns of stabilized and compacted soil. This method comprises a first phase consisting in driving into the ground a rotary drilling tool disintegrating the ground and mixing it with a filler material, and during which an upward movement is imparted to at least part of the disaggregated ground. the drilling tool, and a second phase consisting in withdrawing the drilling tool from the ground, and is characterized in that a device is used, as drilling tool, which comprises at least two parallel shafts, each shaft driving in rotation of an auger, each auger being provided at its end opposite the drive shaft with a disaggregating drilling head and the distance between the axes of the augers being less than the diameter of an auger, the shafts and barrels of the augers comprising a bore connected to a source of filler material and at least one orifice communicating with said bore being provided on the barrel of each auger for discharging er the filler material, the augers being of opposite pitch and being rotated in opposite directions and which further comprises means for reversing the direction of rotation of the augers, in that the first phase is carried out driving said device into the ground while discharging a filler material through said orifice so as to mix it with the disaggregated ground, and in that the second phase is carried out, after having reversed the direction of rotation of the augers, by exercising a press set on said device while it is being withdrawn so as to print on the disaggregated ground mixed with the material input, a downward movement, tending to compact it, through said device.

Bien que EP-B-0 161 974 revendique, en outre, un dispositif convenant à la mise en oeuvre dudit procédé qui comprend au moins deux tarières, il ne décrit spécifiquement qu'un dispositif à deux tarières seulement.Although EP-B-0 161 974 claims, moreover, a device suitable for implementing said method which comprises at least two augers, it specifically describes only one device with only two augers.

Lors de la mise en oeuvre de ce dispositif spécifique à deux tarières dans des terrains très mous selon le procédé décrit, on a rencontré des difficultés dues au fait que la trajectoire du dispositif peut être fortement déviée par rapport à celle désirée. Après étude, il est apparu que ce phénomène, non perceptible dans des terrains relativement fermes, résulte de la dissymétrie de la répartition des efforts qui s' exercent sur le dispositif en cours de fonctionnement.During the implementation of this specific device with two augers in very soft ground according to the method described, difficulties have been encountered due to the fact that the trajectory of the device can be strongly deviated from that desired. After study, it appeared that this phenomenon, not perceptible in relatively firm ground, results from the asymmetry of the distribution of the forces which are exerted on the device during operation.

Les principaux efforts, qui s'appliquent sur les tarières ou têtes de forage, à savoir :

  • les efforts résultant de l'action de coupe
  • les efforts dus au frottement latéral entre les tarières et le terrain, et
  • les efforts résultant de l'accumulation de matériaux à l'entrée des tarières imbriquées,
    agissent tous dans le même sens et tendent à impartir un mouvement (translation et/ou rotation) au dispositif par rapport au sol, ainsi qu'à exercer un couple sur la glissière de la machine de forage qui sert à guider le dispositif à tarières.
The main efforts, which apply to augers or drill heads, namely:
  • the forces resulting from the cutting action
  • the forces due to the lateral friction between the augers and the ground, and
  • the efforts resulting from the accumulation of materials at the entrance to the nested augers,
    all act in the same direction and tend to impart movement (translation and / or rotation) to the device relative to the ground, as well as to exert a torque on the slide of the drilling machine which serves to guide the auger device.

Les terrains normaux présentant des caractéristiques mécaniques bonnes ou moyennes peuvent développer des réactions limitant les réactions induites par lesdits efforts, mais il n'en est pas de même dans le cas de sols très mous, en particulier dans les argiles sensibles, où les forces de réaction étant insuffisantes, les déviations deviennent inacceptables.Normal soils with good or average mechanical characteristics can develop reactions limiting the reactions induced by said efforts, but it is not the same in the case of very soft soils, in particular in sensitive clays, where the forces of reaction being insufficient, the deviations become unacceptable.

Il existe donc un besoin pour un dispositif perfectionné qui serait exempt de l'inconvénient sus-mentionné.There is therefore a need for an improved device which would be free from the above-mentioned drawback.

L'invention a justement pour objet de fournir un tel dispositif.The object of the invention is precisely to provide such a device.

Plus précisément l'invention concerne un dispositif de réalisation en place de colonnes de sol stabilisé et compacté, du genre qui comprend au moins deux arbres parallèles, chaque arbre entraînant en rotation une tarière, chaque tarière étant munie à son extrémité opposée à l'arbre d'entraînement d'une tête de forage désagrégatrice et la distance entre les axes des tarières étant inférieure au diamètre d'une tarière, les arbres et les fûts des tarières comportant un alésage et au moins un orifice communiquant avec ledit alésage étant prévu sur le fût de chaque tarière pour décharger un matériau d'apport, les tarières étant de pas opposés et étant entraînées en rotation en sens contraire et qui comprend, en outre, des moyens d'inversion du sens de rotation des tarières, caractérisé en ce qu'il comporte un nombre pair n, au moins égal à 4, de tarières et en ce que, vus en section transversale, les axes des tarières sont centrés aux sommets d'un polygone régulier de n côtés.More precisely, the invention relates to a device for producing columns of stabilized and compacted soil in place, of the type which comprises at least two parallel shafts, each shaft driving an auger in rotation, each auger being provided at its end opposite the shaft. for driving a disaggregating drilling head and the distance between the axes of the augers being less than the diameter of an auger, the shafts and barrels of the augers having a bore and at least one orifice communicating with said bore being provided on the barrel of each auger for discharging filler material, the augers being of opposite pitch and being rotated in opposite directions and which further comprises means for reversing the direction of rotation of the augers, characterized in that it includes an even number n , at least equal to 4, of augers and in that, seen in cross section, the axes of the augers are centered at the vertices of a regular polygon of n sides.

Selon des modes de réalisation préférés, le dispositif comporte 4, 6 ou 8 tarières et les axes des tarières sont disposés aux sommets d'un carré, d'un hexagone régulier ou d'un octogone régulier, respectivement.According to preferred embodiments, the device comprises 4, 6 or 8 augers and the axes of the augers are arranged at the vertices of a square, a regular hexagon or a regular octagon, respectively.

Avec une telle géométrie, on obtient un dispositif symétrique dans lequel les efforts sus-mentionnés se compensent de sorte qu'on n'observe plus de déviations en terrains mous.With such a geometry, a symmetrical device is obtained in which the above-mentioned forces compensate each other so that no more deviations in soft ground are observed.

Le dispositif comporte, de préférence, un seul moteur entraînant, par une boîte à engrenages appropriée, toutes les tarières, ceci dans le but de synchroniser les tarières en rotation, ce qui est essentiel compte tenu de leur imbrication mutuelle, mais il n'est évidemment pas exclu d'employer plusieurs moteurs d'entraînement, si désiré, si, par ailleurs, on prévoit des moyens de synchronisation adéquats de la rotation des tarières.The device preferably comprises a single motor driving, by an appropriate gearbox, all the augers, this in order to synchronize the augers in rotation, which is essential given their mutual nesting, but it is not obviously not excluded from using several drive motors, if desired, if, moreover, provision is made for adequate synchronization means of the rotation of the augers.

La description qui va suivre, en regard des dessins annexés, donnée à titre d'exemple non limitatif, fera bien comprend comment l'invention peut être réalisée.The description which follows, with reference to the appended drawings, given by way of nonlimiting example, will make it clear how the invention can be implemented.

Les figures 1 et 2 sont des vues schématiques en élévation et en coupe transversale (selon la ligne II-II) respectivement, d'un mode de réalisation du dispositif selon l'invention.Figures 1 and 2 are schematic views in elevation and in cross section (along line II-II) respectively, of an embodiment of the device according to the invention.

Les figures 3 et 4 sont des vues schématiques en coupe transversale, au niveau des tarières, d'autres modes de réalisation du dispositif de l'invention.Figures 3 and 4 are schematic cross-sectional views, at the augers, of other embodiments of the device of the invention.

Le dispositif représenté sur les figures 1 et 2 comporte les éléments suivants :The device represented in FIGS. 1 and 2 comprises the following elements:

Quatre arbres parallèles 1, pourvus chacun d'un alésage 1a, entraînent quatre tarières hélicoïdales 2 de pas opposés tournant en sens contraire. Les arbres 1 sont disposés de façon que, en coupe transversale (figure 2), leurs axes soient centrés aux sommets d'un carré imaginaire C (représenté en pointillé). Chaque tarière est munie à son extrémité libre d'une tête de forage désagrégatrice 3 adaptée à la nature du terrain. Ce peut être, par exemple, comme illustré, une tête en forme d'hélice, ou bien un couteau. La distance X entre les axes adjacents des tarières est inférieure au diamètre des tarières de façon que les spires des tarières adjacentes soient effectivement engagées l'une dans l'autre de manière à assurer un mouvement ou écoulement forcé du terrain désagrégé 4 par les tarières. Le fût 5 de chaque tarière comporte aussi un alésage 5a qui communique avec l'alésage de l'arbre d'entraînement correspondant, permettant ainsi d'amener le matériau ou liant d'apport, provenant d'une source (non représentée), par voie sèche ou par voie humide jusqu'à des orifices 6 ménagés sur la hauteur du fût de chaque tarière de façon à en assurer le mélange intime avec le terrain désagrégé.Four parallel shafts 1, each provided with a bore 1a, drive four helical augers 2 of opposite pitches rotating in opposite directions. The shafts 1 are arranged so that, in cross section (Figure 2), their axes are centered at the vertices of an imaginary square C (shown in dotted lines). Each auger is provided at its free end with a disaggregating drilling head 3 adapted to the nature of the ground. It can be, for example, as illustrated, a helical head, or a knife. The distance X between the adjacent axes of the augers is less than the diameter of the augers so that the turns of the adjacent augers are effectively engaged one in the other so as to ensure a movement or forced flow of the disaggregated ground 4 by the augers. The barrel 5 of each auger also has a bore 5a which communicates with the bore of the corresponding drive shaft, thus making it possible to bring the filler material or binder, coming from a source (not shown), by dry or wet to openings 6 formed on the height of the barrel of each auger so as to ensure intimate mixing with the disaggregated soil.

La longueur des tarières est adaptée au type de terrain et est habituellement inférieure à la profondeur de la colonne à réaliser.The length of the augers is adapted to the type of terrain and is usually less than the depth of the column to be produced.

Il est à noter que les tarières, au lieu de présenter un profil hélicoïdal continu, pourraient être discontinues, c'est-à-dire être remplacées par une pluralité d'hélices espacées.It should be noted that the augers, instead of having a continuous helical profile, could be discontinuous, that is to say be replaced by a plurality of spaced propellers.

Un certain nombre de doubles-paliers 7, fonction de la profondeur de la colonne à réaliser, sont répartis sur la hauteur des arbres d'entraînement et des tarières de façon à maintenir leur parallélisme.A number of double bearings 7, depending on the depth of the column to be produced, are distributed over the height of the drive shafts and augers so as to maintain their parallelism.

Les quatre arbres 1 sont entraînés en rotation par l'intermédiaire d'un dispositif réducteur inverseur à engrenages 8, lui-même relié à un moteur 9, qui les entraîne ainsi que les tarières, en rotation dans des sens opposés et à même vitesse. Cet ensemble moto-réducteur 8-9 peut être porté par une machine de forage (non représentée) installée en surface au droit de la colonne à réaliser soit par l'intermédiaire d'une glissière sur laquelle il peut se déplacer longitudinalement soit librement soit par l'intermédiaire d'un dispositif de translation. En variante, il peut être suspendu à la flèche d'un engin de levage (grue ou autre). Dans ce dernier cas, on peut adapter le poids du dispositif de façon qu'il exerce l'effort d'appui souhaité.The four shafts 1 are rotated by means of a gear reversing reduction device 8, itself connected to a motor 9, which drives them and the augers, rotating in opposite directions and at the same speed. This motor-reduction unit 8-9 can be carried by a drilling machine (not shown) installed on the surface in line with the column to be produced, either by means of a slide on which it can move longitudinally either freely or by through a translation device. Alternatively, it can be suspended from the boom of a lifting device (crane or other). In the latter case, the weight of the device can be adapted so that it exerts the desired bearing force.

La figure 3 illustre schématiquement un dispositif similaire à celui des figures 1 et 2 si ce n'est qu'il comporte six tarières 2 au lieu de quatre. Les arbres 1 de ces tarières sont disposés de façon que, en coupe transversale, leurs axes soient centrés aux sommets d'un hexagone régulier imaginaire H (représenté en pointillé).Figure 3 schematically illustrates a device similar to that of Figures 1 and 2 except that it has six augers 2 instead of four. The shafts 1 of these augers are arranged so that, in cross section, their axes are centered at the vertices of an imaginary regular hexagon H (shown in dotted lines).

La figure 4 illustre schématiquement un dispositif similaire à celui des figures 1 et 2 si ce n'est qu'il comporte huit tarières 2 au lieu de quatre. Les arbres 1 de ces tarières sont disposés de façon que, en coupe transversale, leurs axes soient centrés aux sommets d'un octogone régulier imaginaire O (représenté en pointillé).Figure 4 schematically illustrates a device similar to that of Figures 1 and 2 except that it has eight augers 2 instead of four. The shafts 1 of these augers are arranged so that, in cross section, their axes are centered at the vertices of an imaginary regular octagon O (shown in dotted lines).

Le dispositif perfectionné de l'invention s'utilise de la même manière que le dispositif décrit dans EP-B-0 161 974 auquel on se reportera pour plus de détails.The improved device of the invention is used in the same way as the device described in EP-B-0 161 974 to which reference will be made for more details.

Cependant, du fait de la nature symétrique du dispositif de l'invention, ce dernier est exempt du défaut présenté par le dispositif de EP-B-0 161 974 lorsqu'on l'utilise dans des terrains mous, et rappelé dans le préambule de la présente description.However, due to the symmetrical nature of the device of the invention, the latter is free from the defect presented by the device of EP-B-0 161 974 when it is used in soft ground, and recalled in the preamble of this description.

Il va de soi que les modes de réalisation décrits ne sont que des exemples et l'on pourrait les modifier, notamment par substitution d'équivalents techniques, sans sortir pour cela du cadre de l'invention.It goes without saying that the embodiments described are only examples and they could be modified, in particular by substitution of technical equivalents, without departing from the scope of the invention.

Claims (4)

Dispositif de réalisation en place de colonnes de sol stabilisé et compacté, du genre qui comprend au moins deux arbres parallèles (1), chaque arbre entraînant en rotation une tarière (2), chaque tarière étant munie à son extrémité opposée à l'arbre d'entraînement d'une tête de forage désagrégatrice (3) et la distance (X) entre les axes des tarières étant inférieure au diamètre d'une tarière, les arbres et les fûts (5) des tarières comportant un alésage (1a, 5a) et au moins un orifice (6) communiquant avec ledit alésage étant prévu sur le fût de chaque tarière pour décharger un matériau d'apport, les tarières étant de pas opposés et étant entraînées en rotation en sens contraire et qui comprend, en outre, des moyens d'inversion (8) du sens de rotation des tarières, caractérisé en ce qu'il comporte un nombre pair n, au moins égal à 4, de tarières et en ce que, vus en section transversale, les axes des tarières sont centrés aux sommets d'un polygone régulier (C, H, O) de n côtés.Device for producing columns of stabilized and compacted soil in place, of the type which comprises at least two parallel shafts (1), each shaft driving in rotation an auger (2), each auger being provided at its end opposite the shaft d drive of a disaggregating drilling head (3) and the distance (X) between the axes of the augers being less than the diameter of an auger, the shafts and the drums (5) of the augers having a bore (1a, 5a) and at least one orifice (6) communicating with said bore being provided on the barrel of each auger for discharging a filler material, the augers being of opposite pitch and being driven in rotation in opposite directions and which further comprises reversing means (8) of the direction of rotation of the augers, characterized in that it comprises an even number n , at least equal to 4, of augers and in that, seen in cross section, the axes of the augers are centered at the tops of a regular polygon (C, H, O) of n sides. Dispositif selon la revendication 1, caractérisé en ce qu'il comporte quatre tarières dont les axes, en coupe transversale, sont centrés aux sommets d'un carré imaginaire.Device according to claim 1, characterized in that it comprises four augers whose axes, in cross section, are centered at the vertices of an imaginary square. Dispositif selon la revendication 1, caractérisé en ce qu'il comporte six tarières dont les axes, en coupe transversale, sont centrés aux sommets d'un hexagone régulier imaginaire.Device according to claim 1, characterized in that it comprises six augers whose axes, in cross section, are centered at the vertices of an imaginary regular hexagon. Dispositif selon la revendication 1, caractérisé en ce qu'il comporte huit tarières dont les axes, en coupe transversale, sont centrés aux sommets d'un octogone régulier imaginaire.Device according to claim 1, characterized in that it comprises eight augers whose axes, in cross section, are centered at the vertices of an imaginary regular octagon.
EP95400033A 1994-01-14 1995-01-06 Apparatus for forming piles of soil stabilised and compacted in situ Expired - Lifetime EP0663475B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9400380 1994-01-14
FR9400380A FR2715177B1 (en) 1994-01-14 1994-01-14 Improved device for making in place columns of stabilized and compacted soil.

Publications (2)

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EP0663475A1 true EP0663475A1 (en) 1995-07-19
EP0663475B1 EP0663475B1 (en) 1998-03-04

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US (1) US5738465A (en)
EP (1) EP0663475B1 (en)
JP (1) JPH0835223A (en)
AT (1) ATE163704T1 (en)
AU (1) AU682731B2 (en)
DE (1) DE69501668D1 (en)
DK (1) DK0663475T3 (en)
ES (1) ES2114723T3 (en)
FR (1) FR2715177B1 (en)
HK (1) HK1004609A1 (en)
MY (1) MY131724A (en)
SG (1) SG52201A1 (en)

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EP1741836A1 (en) * 2005-06-28 2007-01-10 SOILMEC S.p.A. Equipment and method mixing in loco for the formation of diaphragms
EP2666911A1 (en) * 2012-05-25 2013-11-27 Bauer Spezialtiefbau GmbH Method for producing a floor mortar wall in the floor
CN104631449A (en) * 2015-02-28 2015-05-20 朱艳菊 Parallelogram-shaped mixing-pile drilling machine
CN105507248A (en) * 2015-12-31 2016-04-20 卢兴耐 Equipment for latching H-shaped piles and rectangular piles in trapezoidal manner
CN105625393A (en) * 2015-12-31 2016-06-01 宗琪 Fillet parallelogram drilling stirrer
EP3508555A1 (en) * 2018-01-09 2019-07-10 Holcim Technology Ltd. Method for the production of underground foundations

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DE102006028473A1 (en) * 2006-06-21 2007-12-27 Winter Von Adlersflügel, Johannes Bernhard Filling unit
ATE541991T1 (en) * 2007-05-10 2012-02-15 Luc Maria Hugo Corneel Smet IMPROVED DRILLING JIG
US10161097B2 (en) * 2012-05-23 2018-12-25 Ext Co., Ltd. Hybrid foundation structure, and method for building same
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GB2525147B (en) * 2014-01-27 2020-09-09 Mmi Engineering Ltd Pile insertion
CN104153358A (en) * 2014-08-26 2014-11-19 上海强劲地基工程股份有限公司 Multi-row and multi-shaft cemented soil mixing pile drilling machine
CN104612140B (en) * 2015-02-28 2016-05-18 宗超 π shape cement earth pile wall telephone
JP6238088B2 (en) * 2015-04-03 2017-11-29 学校法人関東学院 Improved ground and ground improvement method
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CN104878749B (en) * 2015-06-05 2016-11-30 华北水利水电大学 Octagon soil cement pile-formation machine
CN105019439B (en) * 2015-06-05 2016-09-14 秦劳（上海）实业有限公司 Octagon soil cement pile-formation machine
CN105239566B (en) * 2015-08-12 2017-01-25 河海大学 Multi-head stirring type large-diameter cast-in-situ pipe pile device and application thereof
CN105113488B (en) * 2015-08-12 2017-05-03 河海大学 Construction method of multi-head minor-diameter long-spiral drilling machine in cast-in-situ major-diameter tubular pile
CN105421371A (en) * 2015-12-31 2016-03-23 卢兴耐 Combination type pile stirring machine
CN105442536A (en) * 2015-12-31 2016-03-30 卢兴耐 Rectangular pile and H pile trapezoidal latch equipment
US11492774B2 (en) * 2019-01-04 2022-11-08 Ojjo, Inc. Systems, methods and machines for driving screw anchors

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EP1741836A1 (en) * 2005-06-28 2007-01-10 SOILMEC S.p.A. Equipment and method mixing in loco for the formation of diaphragms
EP2666911A1 (en) * 2012-05-25 2013-11-27 Bauer Spezialtiefbau GmbH Method for producing a floor mortar wall in the floor
CN104631449A (en) * 2015-02-28 2015-05-20 朱艳菊 Parallelogram-shaped mixing-pile drilling machine
CN104631449B (en) * 2015-02-28 2016-05-25 卢兴耐 Parallelogram mixing pile rig
CN105507248A (en) * 2015-12-31 2016-04-20 卢兴耐 Equipment for latching H-shaped piles and rectangular piles in trapezoidal manner
CN105625393A (en) * 2015-12-31 2016-06-01 宗琪 Fillet parallelogram drilling stirrer
EP3508555A1 (en) * 2018-01-09 2019-07-10 Holcim Technology Ltd. Method for the production of underground foundations
WO2019138319A3 (en) * 2018-01-09 2019-10-03 Holcim Technology Ltd Method for the production of underground foundations

Also Published As

Publication number Publication date
HK1004609A1 (en) 1998-11-27
ES2114723T3 (en) 1998-06-01
SG52201A1 (en) 1998-09-28
JPH0835223A (en) 1996-02-06
MY131724A (en) 2007-08-30
DK0663475T3 (en) 1998-09-28
EP0663475B1 (en) 1998-03-04
FR2715177B1 (en) 1996-03-01
DE69501668D1 (en) 1998-04-09
AU682731B2 (en) 1997-10-16
ATE163704T1 (en) 1998-03-15
AU1013395A (en) 1995-07-27
FR2715177A1 (en) 1995-07-21
US5738465A (en) 1998-04-14

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