EP1748108B1 - Auger for piling - Google Patents
Auger for piling Download PDFInfo
- Publication number
- EP1748108B1 EP1748108B1 EP06117715A EP06117715A EP1748108B1 EP 1748108 B1 EP1748108 B1 EP 1748108B1 EP 06117715 A EP06117715 A EP 06117715A EP 06117715 A EP06117715 A EP 06117715A EP 1748108 B1 EP1748108 B1 EP 1748108B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- auger
- core
- gouge
- movable
- translation
- 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.)
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Links
- 238000006073 displacement reaction Methods 0.000 claims abstract description 23
- 230000000149 penetrating effect Effects 0.000 claims description 4
- 239000002002 slurry Substances 0.000 claims 2
- 239000011440 grout Substances 0.000 description 10
- 239000004567 concrete Substances 0.000 description 8
- 238000005553 drilling Methods 0.000 description 6
- 239000007788 liquid Substances 0.000 description 5
- 210000000078 claw Anatomy 0.000 description 4
- 238000002347 injection Methods 0.000 description 4
- 239000007924 injection Substances 0.000 description 4
- 239000004568 cement Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- 239000004459 forage Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 240000008042 Zea mays Species 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- -1 through orifices Substances 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B10/00—Drill bits
- E21B10/44—Bits with helical conveying portion, e.g. screw type bits; Augers with leading portion or with detachable parts
-
- 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
- E02D5/22—Piles
- E02D5/34—Concrete or concrete-like piles cast in position ; Apparatus for making same
- E02D5/38—Concrete or concrete-like piles cast in position ; Apparatus for making same making by use of mould-pipes or other moulds
- E02D5/385—Concrete or concrete-like piles cast in position ; Apparatus for making same making by use of mould-pipes or other moulds with removal of the outer mould-pipes
Definitions
- the present invention relates to a mobile pin auger.
- the auger For the production of drilled or molded piles, it is most often used as an auger tool that allows to dig into the ground a cylindrical excavation corresponding to the dimensions of the pile to be made and which also allows the recovery of the ground dug or cut.
- the auger is equipped with a dip tube which is slidably mounted in the hollow core of the auger and which allows to inject into the borehole, as and when the auger is raised, concrete or grout used to make the stake.
- the forces that can absorb the molded or drilled pile depend on the one hand of the diameter of the latter and on the other hand the coefficient of friction that exists between the outer wall of the pile and the inner wall of the borehole.
- the increase in the diameter of the pile leads to an increase in the cost of drilling and especially an increase in the amount of grout or concrete to be used to make the pile. It is therefore understood that it is advantageous, to increase the efficiency of the pile, to improve the coefficient of friction between the pile and the ground. For this, it is known to make, using a pin, a helical groove in the inner wall of the borehole which will subsequently be filled as the drilling by concrete or grout to form a helical rib penetrating into the ground .
- the reference 10 representing the cylindrical bore
- the reference 12 representing the inner wall of this bore
- the reference 14 representing the helical groove formed in the wall 12 of the borehole.
- This figure also shows the pile 16 with its helical rib 18 penetrating the soil S.
- the lower end of the auger blade is usually equipped with a lug.
- this lug is fixed, that is to say that it makes a groove in the direction of the descent and the ascent of the auger. This is what is described in the patent EP 1 277 887 on behalf of COMPAGNIE DU SOL.
- COMPAGNIE DU SOL To obtain a high quality of this groove, that is to say an effective compaction of the walls of the rib, it is necessary in particular to precisely control the rotational speed and linear displacement of the auger on the descent and especially at the ascent.
- An object of the present invention is to provide an auger equipped with a movable pin for which we can ensure the effective output of the pin during the recovery of the auger reliably and holding the pin in this position.
- the auger is characterized in that said additional member is a tubular element extending over the entire length of the core of the auger and whose upper end is connected to a duct. a supply of pressurized liquid and the inner end of which is provided with at least one orifice for injection into the borehole
- the auger is characterized in that said tubular element is movable in translation in said core and in that said control means causes the displacement of the lug from its retracted position to its active position. response to the translational movement of said tubular member.
- the auger is characterized in that said tubular element is rotatable in said core and in that said control means causes the displacement of the lug from its retracted position to its active position. response to rotation of said tubular member.
- the auger is preferably characterized in that said tubular element is a dip tube which is movable in translation in said hollow core between a retracted position in which the lower end of the dip tube closes. lower end of the auger core and an extended position in which the lower end of the dip tube protrudes out of the lower end of the auger.
- the auger is characterized in that said additional member is a portion of tube mounted to move in translation and / or in rotation in the hollow core of the auger, at its lower end.
- the auger is characterized in that said tube portion is mounted to move in translation inside the core of the auger and in that said control means cause the displacement of the pin from its retracted position to its active position in response to the displacement of the tube portion.
- the auger is characterized in that said tube portion is rotatable inside the core of the auger and in that said control means cause the displacement of the pin from its retracted position to its active position in response to rotation of said tube portion.
- the auger is characterized in that the core of said auger comprises an upper part and a lower part movable in translation relative to said upper part over a predetermined length, said lug being mounted on said lower part, in that said additional member comprises a tubular piece integral with the lower end of the upper part of said core and penetrating inside said lower part of the hollow core, and in that said control means are mounted on said tubular member such that the relative displacement in translation of said lower portion of the core and said tubular member causes the displacement of the lug from its retracted position to its active position.
- FIG. 2 we will describe the entire drilling machine with the ergot auger.
- the platform 20 with its articulated guide post 22 controlled symbolically by the cylinders 24.
- the carriage 26 can be moved along the mast 22 by means not shown. It is thus possible to control on the one hand the rotational speed of the auger by means of the rotation head 28 and on the other hand the linear displacement speed of the auger by controlling the displacement of the carriage 26 with respect to the mast 22.
- the auger 30 is constituted by a hollow cylindrical core 32 and by two helical blades 34 and 36 angularly offset by 180 degrees.
- the core 32 ends with a point 35.
- the leading edges 34a and 36a of the blades are equipped with teeth such as 38.
- the additional member is a tubular piece which extends over the entire length of the core of the auger and which is preferably a dip tube.
- the auger tubes are well known drilling machines and in particular described in the patent application FR 2,807,455 on behalf of the applicant, which should be considered an integral part of this description.
- the auger with a hollow core in which can move in translation a so-called tube dip tube whose upper end is connected by a hose to a source of grout or cement or more generally a loaded liquid and whose Inner end may protrude out of the lower end of the auger to allow injection, through orifices, grout or concrete into the auger borehole.
- the plunger tube can be moved in translation relative to the auger using, for example, cylinders mounted on the auger rotation head and, most often, the dip tube can also be rotated about its longitudinal axis relative to the auger.
- the relative movement of said dip tube with respect to the auger is used to control the motor means of the mobile pin.
- the lower part of the auger 30 is shown with its core 32, its blades 34 and 36 and its pivot pin 42.
- a dip tube 100 whose lower end is closed by a tapered tip 102.
- the dip tube has a plurality of orifices 104 to allow the exit of the grout or cement.
- the plunger tube 100 is in the raised position inside the core of the auger 32, the plunger tube and the auger are integral in rotation.
- the lower face 32a of the core 32 of the auger is provided with notches such as 106 which can cooperate with jaws 108 provided on the periphery of the lower end of the dip tube, that is to say immediately above its end 102.
- the auger and the plunger tube are integral in rotation.
- the plunger tube when the plunger tube is in the extended position to allow the injection of concrete, cement or grout, the lower end of the plunger tube 100 occupies a position such that the orifices 104 are disengaged and of course the jaws 108 are out of the notches 106.
- movable pistons such as 110 are mounted in the notches 106.
- the end 32a of the core of the auger may comprise four notches 106, in each notch two movable pistons 110 being mounted.
- each piston 110 is constituted by a rod 112 capable of receiving the action of the claws 108 by its first end 112a while its second end 112b cooperates with a return spring 114.
- a piston 116 mounted movably in a cylindrical chamber 118 filled with an incompressible liquid.
- the piston 116 divides the cylinder 118 into two chambers respectively 120 and 122.
- Each chamber is connected by a pipe 124, 126 to a control cylinder 128 and 130.
- the control cylinders 128 and 130 act on both sides of the cylinder.
- pivot axis 44 of the lug 42 for respectively bringing the lug in the output position or in the retracted position.
- FIGS. 6, 7 and 8 illustrate a second embodiment of the invention.
- a rotational movement of the dip tube relative to the auger is used to control the motor means of the movable pin.
- an additional motor 140 which allows to cause a rotational movement of the plunger tube 100 relative to the core 32 of the auger. More specifically, this possibility of rotation is limited by two stops 142 and 144 formed at the upper end of the core 32 of the auger and by an extension 146 secured to the outer face of the upper end 100a of the dip tube.
- the plunger tube 100 can be brought into a first position in which the extension 146 is in contact with the abutment 142 and a second position in which the extension 146 is in contact with the second abutment 144 .
- the plunger tube 100 has a recessed portion 150 relative to its outer wall 100b which is also visible on the Figures 8A and 8B .
- This recess portion 150 constitutes a rotary cam about the longitudinal axis X, X 'of the dip tube and the core 32 of the auger.
- At the mobile pin 42 are mounted two pushers 152 and 154 movable in translation in holes 156 and 158 formed in the core 32 of the auger. The first ends of the pushers are in contact with the outer face of the dip tube 100 while their second ends are in contact with the control portion of the mobile pin 42 on either side of its pivot axis 44.
- the pusher 152 In the first angular position of the dip tube 100, the pusher 152 is in contact with the outer wall 100b of the dip tube while the pusher 154 is in contact with the recess 150, which causes the mobile pin 42 to be in the extended position ( figure 8A ).
- the second angular position it is the first pusher 152 which in contact with the recess 150, while the second pusher 154 is in contact with the outer wall 100b of the plunger tube 100. the lug 42 in its retracted position.
- the control member essentially consists of a toothed ring 160 which surrounds the plunger tube 100 and which is free to rotate relative thereto but immobilized in vertical translation relative to the plunger tube.
- the ring 160 is integral with a control finger 162 which penetrates into a helical slot 164 formed in the corresponding portion of the plunger tube and which constitutes a cam.
- the helical slot formed in the dip tube is preceded by a vertical slot which is therefore without effect on the ring.
- the toothed portion of the rotary ring 162 cooperates with a control portion 42a of the movable pin 42 which is also toothed.
- the meshing between the toothed portion of the ring 162 and the control portion 42a of the lug 42 is via a slot 166 formed in the lower part of the hollow core 32 of the auger.
- the relative displacements (rotation or translation) of the plunger tube with respect to the core of the auger will be used instead to detect that the lug 42 has been brought into the extended position. Indeed, these movements can easily be detected at the upper end of the auger.
- FIG. 11A and 11B a third embodiment of the invention will be described. It corresponds to the case where the auger 30 is not equipped with a tubular element extending over the entire length of the core of the auger. The injection of grout or concrete into the borehole is then performed by feeding the hollow core 32 of the auger with this product.
- the lower end of the auger is equipped with a moving part 170 constituted by a portion of tube 172 of reduced length relative to the length of the auger and closed at its lower end by a bottom 174 of conical shape that forms the tip of the auger.
- the portion of tube 172 is free in translation in the hollow core of the auger and provided with orifices 176 for the outlet of the grout or concrete.
- the movable member 170 is in the retracted position in the auger, the movable piece is rotatably secured thereto by claws 178 and notches 180 formed in the lower edge of the core 32 of the auger.
- the moving part 170 During the descent movement of the auger, which corresponds to the digging of the borehole, the moving part 170 is held back into the core of the auger ( figure 11A ).
- the auger when the auger is raised and a grout or concrete is injected into the hollow core thereof, the pressure of the material on the moving part 170 as well as the action of the surrounding ground cause relative movement. of translation of the moving part 170 relative to the core of the auger, the amplitude of this relative movement is limited for example by stops (not shown in the figures). This is what is represented on the Figure 11B .
- This result can also be obtained by interposing a spring between the core of the auger and the moving part. During the descent movement of the auger, the spring is compressed. When initiating the upward movement, the spring relaxes and causes the output of the moving part.
- This relative translation movement serves to control the pivoting of the lug 42 by motor means symbolically represented by the reference 181.
- the control means may be of the type illustrated by the Figures 6 to 8 (hydraulic) or the type illustrated by the Figures 9 and 10 (mechanical), the tube portion 172 of the moving part replacing the dip tube.
- the figure 12 illustrates a fourth embodiment of the invention.
- the auger 30 is equipped with a moving part 170 slidably mounted in the hollow core 32 of the auger.
- the difference with the third embodiment consists in the fact that the outer face of the portion of the tube 172 and the lower end of the inner face of the hollow core 32 of the auger comprise conjugate reliefs 182 capable of converting the movement relative translation of the movable part 170 relative to the core of the auger, during the ascent thereof, in a rotational movement. It is this movement that is used to control the movement of the pin 42.
- control means symbolized by the reference 184 can then be of the type represented on the Figures 6 and 8 , the tube portion 172 replacing the dip tube.
- the movable pin is rotated to move from its retracted position to its active or output position.
- control means could be arranged so that the movable pin is driven in a translational movement in a radial direction relative to the axis of the soul of the auger.
- the auger is constituted by a cutting head 220 which is mounted at the lower end of a hollow drill string, these rods being provided with an external helical blade.
- the cutting head 220 which allows the movement of the lug 240 will be considered.
- the movement of the lug is a movement in translation in a radial direction substantially orthogonal to the lug. longitudinal axis of the cutting head 220. It goes without saying that, by a simple modification within the reach of ordinary skill in the art, this movement could be a pivoting movement about an axis connected to the head of the art. chopped off.
- the cutting head 220 comprises an upper portion 222 and a lower portion 224.
- the lower end 222b of the cutting head is connected to a blade stem string by connecting means 226.
- the lower end 222b of the part upper part is extended downwards by a tubular extension 228.
- the upper part 222 is constituted by a cylindrical body 230 and a blade 232.
- the lower portion 224 has the general shape of a cylindrical hollow rod 234 provided with a blade 236.
- the extension 218 of the lower portion 222 is slidably mounted in the hollow rod 234 of the lower portion 224.
- the lower part 224 is connected to the upper part 222 by connecting means 238.
- the connecting means 238 rotate integrally with the parts 222 and 224 and allow a relative movement in translation of the parts 222 and 224 of limited amplitude.
- the lower end 224a of the lower portion 224 is provided with a movable lug (or cutting tooth) 240.
- the lug 240 is connected to displacement means 242 for moving the lug.
- the lower end 228a of the tubular end 228 is provided with control means 244.
- the control means 244 cooperate with the displacement means 242.
- the lug 240 is in its retracted position shown on the figure 13 . This corresponds to the descent movement of the auger.
- the control means 244 act on the displacement means 242 to bring the pin 240 into its output position and keep it there. This corresponds to the lift movement of the auger.
- connection means 238 a preferred embodiment of connection means 238 will be described.
- the upper end 234a of the hollow rod 234 is integral with a female hexagonal connection box 246.
- the lower end 222b of the upper portion 222 is secured to the upper portion 248a of a hexagonal drive male member 248
- the lower end 248b of the male member 248 is integral with the upper end 228b of the extension 228.
- the male and female members 246 are integral in rotation.
- the upper end 246a of the female member is provided with a retaining ring 250 integral with the female drive box 246 and protrudes from the inner wall 246c of the drive box 246.
- the outer wall 248c of the male member 248 is provided with a shoulder 252 which cooperates with the retaining ring 250.
- a protected volume 254 is limited by the blade propeller 256, a side wall 258 and a bottom plate 259.
- a horizontal axis guide tube 260 is fixed on the rod 234 of the lower part 224.
- the tube 260 extends radially.
- a piston 262 is slidably mounted in this tube.
- the lug 240 is attached to a first end 262a of the piston.
- the second end of the piston has the shape of an inclined surface 264.
- the lower end of the rod 234 is provided with a slot 266 in which a wedge-shaped controller 268 can move vertically.
- the wedge 268 is attached to the lower end of the extension 228.
- a vertical movement of the extension 228 is converted into a horizontal movement of the lug 240 by the cooperation of the surface 264 and the wedge 268.
- a return system consisting of the lever 270 connected to the piston 262 and a return spring 272 causes the withdrawal of the lug 240.
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Abstract
Description
La présente invention a pour objet une tarière à ergot mobile.The present invention relates to a mobile pin auger.
Pour la réalisation de pieux forés ou moulés, on utilise le plus souvent comme outil une tarière qui permet de creuser dans le sol une excavation cylindrique correspondant aux dimensions du pieu à réaliser et qui permet également la remontée du terrain creusé ou découpé. Souvent, la tarière est équipée d'un tube plongeur qui est monté coulissant dans l'âme creuse de la tarière et qui permet d'injecter dans le forage, au fur et à mesure de la remontée de la tarière, le béton ou le coulis servant à réaliser le pieu.For the production of drilled or molded piles, it is most often used as an auger tool that allows to dig into the ground a cylindrical excavation corresponding to the dimensions of the pile to be made and which also allows the recovery of the ground dug or cut. Often, the auger is equipped with a dip tube which is slidably mounted in the hollow core of the auger and which allows to inject into the borehole, as and when the auger is raised, concrete or grout used to make the stake.
Les efforts que peut absorber le pieu moulé ou foré dépendent d'une part du diamètre de celui-ci et d'autre part du coefficient de frottement qui existe entre la paroi externe du pieu et la paroi interne du forage.The forces that can absorb the molded or drilled pile depend on the one hand of the diameter of the latter and on the other hand the coefficient of friction that exists between the outer wall of the pile and the inner wall of the borehole.
L'augmentation du diamètre du pieu entraîne un accroissement du coût du forage et surtout une augmentation de la quantité de coulis ou de béton à utiliser pour réaliser le pieu. On comprend donc qu'il est intéressant, pour augmenter l'efficacité du pieu, d'améliorer le coefficient de frottement entre le pieu et le sol. Pour cela, il est connu de réaliser, à l'aide d'un ergot, une rainure hélicoïdale dans la paroi interne du forage qui sera ultérieurement remplie tout comme le forage par le béton ou le coulis pour former une nervure hélicoïdale pénétrant dans le sol.The increase in the diameter of the pile leads to an increase in the cost of drilling and especially an increase in the amount of grout or concrete to be used to make the pile. It is therefore understood that it is advantageous, to increase the efficiency of the pile, to improve the coefficient of friction between the pile and the ground. For this, it is known to make, using a pin, a helical groove in the inner wall of the borehole which will subsequently be filled as the drilling by concrete or grout to form a helical rib penetrating into the ground .
C'est ce qu'on a représenté sur la
Pour réaliser la rainure hélicoïdale dans la paroi du forage, on équipe habituellement l'extrémité inférieure de la pale de la tarière d'un ergot. Dans certains cas, cet ergot est fixe, c'est-à-dire qu'il réalise une rainure dans le sens de la descente et de la remontée de la tarière. C'est ce qui est décrit dans le brevet
Pour simplifier ces opérations, on a proposé d'utiliser des tarières équipées d'un ergot escamotable ne faisant saillie hors de la pale de la tarière pour réaliser la rainure que durant la remontée de la tarière. En général, la sortie de l'ergot mobile est provoquée simplement par l'inversion du sens de rotation de la tarière. Une telle solution est décrite dans le
Le document
Un objet de la présente invention est de fournir une tarière équipée d'un ergot mobile pour laquelle on peut assurer la sortie effective de l'ergot lors de la remontée de la tarière de façon fiable et le maintien de l'ergot dans cette position.An object of the present invention is to provide an auger equipped with a movable pin for which we can ensure the effective output of the pin during the recovery of the auger reliably and holding the pin in this position.
Pour atteindre ce but, selon l'invention, la tarière comprend :
- une âme ;
- au moins une pale hélicoïdale montée sur la face externe de l'âme et s'étendant sur au moins une partie substantielle de la longueur de l'âme ;
- un ergot mobile de découpe apte à prendre une position active dans laquelle l'ergot fait saillie hors du volume limité par la périphérie de la pale et une position rentrée dans laquelle il est disposé à l'intérieur dudit volume ; et
- des moyens pour déplacer ledit ergot de sa position rentrée à sa position active ;
- ladite âme de la tarière est creuse ; et
- lesdits moyens de déplacement comprennent :
- un organe additionnel monté mobile dans ladite âme en translation et/ou en rotation et disposé au moins à l'extrémité inférieure de ladite âme ; et
- un moyen de commande pour provoquer le déplacement dudit ergot de sa position rentrée à sa position active en réponse au mouvement relatif dudit organe additionnel par rapport à au moins la partie inférieure de ladite âme creuse.
- a soul ;
- at least one helical blade mounted on the outer face of the core and extending over at least a substantial portion of the length of the core;
- a movable lug of cutting adapted to take an active position in which the lug protrudes out of the volume limited by the periphery of the blade and a retracted position in which it is disposed within said volume; and
- means for moving said pin from its retracted position to its active position;
- said core of the auger is hollow; and
- said moving means comprise:
- an additional member movably mounted in said core in translation and / or rotation and disposed at least at the lower end of said core; and
- control means for causing said pin to move from its retracted position to its active position in response to relative movement of said additional member with respect to at least the lower portion of said hollow core.
On comprend que le déplacement de l'ergot mobile de sa position rentrée à sa position active ou sortie est provoqué par la translation ou la rotation de l'organe additionnel. On obtient ainsi, lors de la remontée de la tarière, la sortie de l'ergot dans sa position active de façon très fiable.It is understood that the movement of the movable pin from its retracted position to its active or output position is caused by the translation or rotation of the additional member. Thus, during the recovery of the auger, the output of the pin in its active position very reliably.
Selon une première forme de mise en oeuvre, la tarière se caractérise en ce que ledit organe additionnel est un élément tubulaire s'étendant sur toute la longueur de l'âme de la tarière et dont l'extrémité supérieure est raccordée à une conduite d'alimentation en liquide chargé sous pression et dont l'extrémité intérieure est munie d'au moins un orifice pour permettre l'injection dans le forageAccording to a first embodiment, the auger is characterized in that said additional member is a tubular element extending over the entire length of the core of the auger and whose upper end is connected to a duct. a supply of pressurized liquid and the inner end of which is provided with at least one orifice for injection into the borehole
Selon un premier mode de mise en oeuvre, la tarière se caractérise en ce que ledit élément tubulaire est mobile en translation dans ladite âme et en ce que ledit moyen de commande provoque le déplacement de l'ergot de sa position rentrée à sa position active en réponse au mouvement de translation dudit élément tubulaire.According to a first mode of implementation, the auger is characterized in that said tubular element is movable in translation in said core and in that said control means causes the displacement of the lug from its retracted position to its active position. response to the translational movement of said tubular member.
Selon un deuxième mode de mise en oeuvre, la tarière se caractérise en ce que ledit élément tubulaire est mobile en rotation dans ladite âme et en ce que ledit moyen de commande provoque le déplacement de l'ergot de sa position rentrée à sa position active en réponse à la rotation dudit élément tubulaire.According to a second embodiment, the auger is characterized in that said tubular element is rotatable in said core and in that said control means causes the displacement of the lug from its retracted position to its active position. response to rotation of said tubular member.
Dans cette première forme de mise en oeuvre, de préférence, la tarière se caractérise en ce que ledit élément tubulaire est un tube plongeur qui est mobile en translation dans ladite âme creuse entre une position rentrée dans laquelle l'extrémité inférieure du tube plongeur obture l'extrémité inférieure de l'âme de la tarière et une position sortie dans laquelle l'extrémité inférieure du tube plongeur fait saillie hors de l'extrémité inférieure de la tarière.In this first embodiment, the auger is preferably characterized in that said tubular element is a dip tube which is movable in translation in said hollow core between a retracted position in which the lower end of the dip tube closes. lower end of the auger core and an extended position in which the lower end of the dip tube protrudes out of the lower end of the auger.
Selon une deuxième forme de mise en oeuvre, la tarière se caractérise en ce que ledit organe additionnel est une portion de tube montée mobile en translation et/ou en rotation dans l'âme creuse de la tarière, à son extrémité inférieure.According to a second form of implementation, the auger is characterized in that said additional member is a portion of tube mounted to move in translation and / or in rotation in the hollow core of the auger, at its lower end.
Selon un troisième mode de mise en oeuvre, la tarière se caractérise en ce que ladite portion de tube est montée mobile en translation à l'intérieur de l'âme de la tarière et en ce que lesdits moyens de commande provoquent le déplacement de l'ergot de sa position rentrée à sa position active en réponse au déplacement de la portion de tube.According to a third mode of implementation, the auger is characterized in that said tube portion is mounted to move in translation inside the core of the auger and in that said control means cause the displacement of the pin from its retracted position to its active position in response to the displacement of the tube portion.
Selon un quatrième mode de mise en oeuvre, la tarière se caractérise en ce que ladite portion de tube est mobile en rotation à l'intérieur de l'âme de la tarière et en ce que lesdits moyens de commande provoquent le déplacement de l'ergot de sa position rentrée à sa position active en réponse à la rotation de ladite portion de tube.According to a fourth mode of implementation, the auger is characterized in that said tube portion is rotatable inside the core of the auger and in that said control means cause the displacement of the pin from its retracted position to its active position in response to rotation of said tube portion.
Selon un cinquième mode de mise en oeuvre, la tarière se caractérise en ce que l'âme de ladite tarière comprend une partie supérieure et une partie inférieure mobile en translation par rapport à ladite partie supérieure sur une longueur prédéterminée, ledit ergot étant monté sur ladite partie inférieure, en ce que ledit organe additionnel comprend une pièce tubulaire solidaire de l'extrémité inférieure de la partie supérieure de ladite âme et pénétrant à l'intérieur de ladite partie inférieure de l'âme creuse, et en ce que lesdits moyens de commande sont montés sur ladite pièce tubulaire de telle manière que le déplacement relatif en translation de ladite partie inférieure de l'âme et de ladite pièce tubulaire provoque le déplacement de l'ergot de sa position rentrée à sa position active.According to a fifth mode of implementation, the auger is characterized in that the core of said auger comprises an upper part and a lower part movable in translation relative to said upper part over a predetermined length, said lug being mounted on said lower part, in that said additional member comprises a tubular piece integral with the lower end of the upper part of said core and penetrating inside said lower part of the hollow core, and in that said control means are mounted on said tubular member such that the relative displacement in translation of said lower portion of the core and said tubular member causes the displacement of the lug from its retracted position to its active position.
D'autres caractéristiques et avantages de l'invention apparaîtront mieux à la lecture de la description qui suit de plusieurs modes de réalisation de l'invention donnés à titre d'exemples non limitatifs. La description se réfère aux figures annexées, sur lesquelles :
- la
figure 1 , déjà décrite, montre en coupe verticale un pieu foré obtenu à l'aide d'une tarière à ergot. - la
figure 2 est une vue en élévation de l'ensemble de la machine de forage comportant la tarière à ergot mobile ; - les
figures 3A et 3B montrent l'extrémité inférieure d'une tarière équipée d'un tube plongeur correspondant à un premier mode de mise en oeuvre de l'invention ; - la
figure 4 montre en vue de dessous, l'extrémité inférieure de l'âme de la tarière selon le premier mode de mise en oeuvre de l'invention ; - la
figure 5 montre les circuits de commande de l'ergot mobile selon le premier mode de mise en oeuvre de l'invention ; - la
figure 6 montre l'extrémité inférieure de la tarière selon un deuxième mode de mise en oeuvre de l'invention ; - la
figure 7 est une vue de dessus simplifiée de la tarière de lafigure 6 ; - les
figures 8A et 8B sont des vues en coupe selon la ligne XI-XI de lafigure 6 montrant l'ergot en position "sortie" et en position "rentrée" ; - la
figure 9 est une vue en coupe verticale de l'extrémité inférieure de la tarière selon une variante du premier mode de mise en oeuvre de l'invention ; - les
figures 10A et 10B sont des vues partielles en perspective de la partie inférieure de la tarière de lafigure 9 montrant l'ergot mobile dans ses deux positions ; - les
figures 11A et 11B montrent l'extrémité inférieure de la tarière selon un troisième mode de mise en oeuvre de l'invention ; - la
figure 12 montre l'extrémité inférieure de la tarière selon un quatrième mode de mise en oeuvre de l'invention ; - la
figure 13 est une vue en élévation d'un cinquième mode de réalisation de l'invention ; - la
figure 14 est une vue de côté du cinquième mode de réalisation de l'invention ; - la
figure 15 est une vue en coupe verticale du cinquième mode de réalisation de l'invention ; - la
figure 16 est une vue en élévation de la partie supérieure de la tête de coupe en position rentrée d'un cinquième mode de réalisation de l'invention ; - la
figure 17 est une vue en coupe verticale selon la ligne A-A de lafigure 16 ; - la
figure 18 est une vue en coupe horizontale selon la ligne B-B de lafigure 16 ; - la
figure 19 est une vue similaire à celle de lafigure 16 , la tête de coupe étant en position étendue ; - la
figure 20 est une vue en coupe verticale selon la ligne C-C de lafigure 19 ; - la
figure 21 est une vue en perspective de la partie inférieure de la tête de coupe ; - la
figure 22 est une vue analogue à celle de lafigure 21 , mais en partie écorchée ; et - la
figure 23 est une vue en coupe verticale de l'extrémité inférieure de la tête de coupe.
- the
figure 1 , already described, shows in vertical section a drilled pile obtained using a hook auger. - the
figure 2 is an elevational view of the entire drilling machine including the movable pin auger; - the
Figures 3A and 3B show the lower end of an auger equipped with a dip tube corresponding to a first embodiment of the invention; - the
figure 4 shows in bottom view, the lower end of the core of the auger according to the first embodiment of the invention; - the
figure 5 shows the control circuits of the movable pin according to the first embodiment of the invention; - the
figure 6 shows the lower end of the auger according to a second embodiment of the invention; - the
figure 7 is a simplified top view of the auger of thefigure 6 ; - the
Figures 8A and 8B are sectional views along line XI-XI of thefigure 6 showing the pin in the "out" position and in the "retracted"position; - the
figure 9 is a vertical sectional view of the lower end of the auger according to a variant of the first embodiment of the invention; - the
Figures 10A and 10B are partial perspective views of the lower part of the auger thefigure 9 showing the movable pin in its two positions; - the
Figures 11A and 11B show the lower end of the auger according to a third embodiment of the invention; - the
figure 12 shows the lower end of the auger according to a fourth embodiment of the invention; - the
figure 13 is an elevational view of a fifth embodiment of the invention; - the
figure 14 is a side view of the fifth embodiment of the invention; - the
figure 15 is a vertical sectional view of the fifth embodiment of the invention; - the
figure 16 is an elevational view of the upper part of the cutting head in the retracted position of a fifth embodiment of the invention; - the
figure 17 is a vertical sectional view along line AA of thefigure 16 ; - the
figure 18 is a horizontal sectional view along line BB of thefigure 16 ; - the
figure 19 is a view similar to that of thefigure 16 the cutting head being in the extended position; - the
figure 20 is a vertical sectional view along the line CC of thefigure 19 ; - the
figure 21 is a perspective view of the lower part of the cutting head; - the
figure 22 is a view similar to that of thefigure 21 but partly skinned; and - the
figure 23 is a vertical sectional view of the lower end of the cutting head.
En se référant tout d'abord à la
La tarière 30 est constituée par une âme cylindrique creuse 32 et par deux pales hélicoïdales 34 et 36 décalées angulairement de 180 degrés. L'âme 32 se termine par une pointe 35. Les bords d'attaque 34a et 36a des pales sont équipés de dents telles que 38.The
Il va de soi qu'on ne sortirait pas de l'invention si la tarière comportait une seule pale hélicoïdale ou si cette tarière comportait une pale hélicoïdale sur toute sa hauteur et une deuxième pale sur sa partie terminale proche de la pointe 35.It goes without saying that it would not go beyond the invention if the auger had a single helical blade or if this auger had a helical blade over its entire height and a second blade on its end portion near the
Dans la description qui suit en référence aux
Les tarières à tube plongeur sont des machines de forage bien connues et notamment décrites dans la demande de brevet
Dans le premier mode de mise en oeuvre de l'invention, on utilise, pour commander les moyens moteurs de l'ergot mobile, le mouvement relatif en translation dudit tube plongeur par rapport à la tarière.In the first embodiment of the invention, the relative movement of said dip tube with respect to the auger is used to control the motor means of the mobile pin.
Sur les
Selon ce premier mode de mise en oeuvre représenté sur les
On comprend que lorsque le tube plongeur est en position rentrée comme cela est représenté sur les figures 6B, les crabots 108 entrant dans les encoches 106 poussent les pistons 110. En revanche, lorsque le tube plongeur est en position sortie, aucune action n'est exercée sur le piston 110. C'est cette absence d'action sur les pistons 110 qui va être utilisée pour commander le pivotement de l'ergot mobile 42.It is understood that when the plunger tube is in the retracted position as shown in FIGS. 6B, the
Comme le montre mieux la
On comprend que lorsque le tube plongeur est en positon rentrée (
Les
Comme le montre mieux la
Dans la première position angulaire du tube plongeur 100, le poussoir 152 est au contact de la paroi externe 100b du tube plongeur alors que le poussoir 154 est au contact de l'évidement 150, ce qui amène l'ergot mobile 42 en position sortie (
En se référant maintenant aux
Pour commander les déplacements de l'ergot mobile 42, on utilise le mouvement de translation verticale du tube plongeur 100 par rapport à l'âme de la tarière 32. L'organe de commande est essentiellement constitué par une bague en partie dentée 160 qui entoure le tube plongeur 100 et qui est libre en rotation par rapport à celui-ci mais immobilisé en translation verticale par rapport au tube plongeur. La bague 160 est solidaire d'un doigt de commande 162 qui pénètre dans une fente hélicoïdale 164 ménagée dans la portion correspondante du tube plongeur et qui constitue une came. En réalité, pour tenir compte de la longueur de la course relative du tube plongeur par rapport à l'âme de la tarière, la fente hélicoïdale ménagée dans le tube plongeur est précédée par une fente verticale qui est donc sans effet sur la bague. La portion dentée de la bague rotative 162 coopère avec une portion de commande 42a de l'ergot mobile 42 qui est également dentée. L'engrènement entre la partie dentée de la bague 162 et la partie de commande 42a de l'ergot 42 se fait par l'intermédiaire d'une fente 166 ménagée dans la partie inférieure de l'âme creuse 32 de la tarière.To control the movements of the
On comprend que lorsque l'on déplace le tube plongeur 100 selon la direction verticale par rapport à l'âme de la tarière, la fente hélicoïdale 164 qui joue le rôle de came provoque la rotation dans un sens ou dans l'autre du doigt de commande 162 et donc la rotation de la bague partiellement dentée 162. La rotation de cette bague entraîne elle-même la rotation de l'ergot mobile 42 autour de son axe 44 pour l'amener soit en position rentrée comme cela est représenté sur la
Comme dans le premier mode de mise en oeuvre, on peut monter sur l'axe 44 de pivotement de l'ergot 42 un capteur de rotation. Le signal délivré par ce capteur et transmis à l'ensemble de commande de la tarière permet de s'assurer que l'ergot 42 occupe effectivement la position souhaitée.As in the first embodiment, it is possible to mount on the
Cependant, dans ces deux modes de mise en oeuvre, on utilisera plutôt les déplacements relatifs (rotation ou translation) du tube plongeur par rapport à l'âme de la tarière pour détecter que l'ergot 42 a bien été amené en position sortie. En effet, ces mouvements peuvent aisément être détectés à l'extrémité supérieure de la tarière.However, in these two embodiments, the relative displacements (rotation or translation) of the plunger tube with respect to the core of the auger will be used instead to detect that the
En se référant maintenant aux
Selon ce mode de réalisation, l'extrémité inférieure de la tarière est équipée d'une pièce mobile 170 constituée par une portion de tube 172 de longueur réduite par rapport à la longueur de la tarière et obturée à son extrémité inférieure par un fond 174 de forme conique qui forme la pointe de la tarière. La portion de tube 172 est libre en translation dans l'âme creuse de la tarière et munie d'orifices 176 pour la sortie du coulis ou du béton. De plus, lorsque la pièce mobile 170 est en position rentrée dans la tarière, la pièce mobile est solidaire en rotation de celle-ci par des crabots 178 et des encoches 180 ménagées dans le bord inférieur de l'âme 32 de la tarière.According to this embodiment, the lower end of the auger is equipped with a moving
Lors du mouvement de descente de la tarière qui correspond au creusement du forage, la pièce mobile 170 est maintenue rentrée dans l'âme de la tarière (
Ce résultat peut également être obtenu en interposant un ressort entre l'âme de la tarière et la pièce mobile. Lors du mouvement de descente de la tarière, le ressort est comprimé. Lorsqu'on amorce le mouvement de remontée, le ressort se détend et provoque la sortie de la pièce mobile.This result can also be obtained by interposing a spring between the core of the auger and the moving part. During the descent movement of the auger, the spring is compressed. When initiating the upward movement, the spring relaxes and causes the output of the moving part.
Ce mouvement relatif de translation sert à commander le pivotement de l'ergot 42 par des moyens moteurs représentés symboliquement par la référence 181.This relative translation movement serves to control the pivoting of the
Les moyens de commande peuvent être du type illustré par les
La
Selon ce mode de mise en oeuvre, la tarière 30 est équipée d'une pièce mobile 170 montée coulissante dans l'âme creuse 32 de la tarière. La différence avec le troisième mode de réalisation consiste dans le fait que la face externe de la portion du tube 172 et l'extrémité inférieure de la face interne de l'âme creuse 32 de la tarière comportent des reliefs conjugués 182 capables de convertir le mouvement relatif de translation de la pièce mobile 170 par rapport à l'âme de la tarière, lors de la remontée de celle-ci, en un mouvement de rotation. C'est ce mouvement qui est utilisé pour commander le déplacement de l'ergot 42.According to this embodiment, the
Les moyens de commande symbolisés par la référence 184 peuvent alors être du type représenté sur les
Dans les modes de réalisation de l'invention décrits en liaison avec les
En se référant maintenant aux
Dans ce mode de réalisation, la tarière est constituée par une tête de coupe 220 qui est montée à l'extrémité inférieure d'un train de tiges creuses, ces tiges étant munies d'une pale hélicoïdale externe. Dans la description qui suit, on ne considérera que la tête de coupe 220 qui permet le mouvement de l'ergot 240. Comme on le verra, le mouvement de l'ergot est un mouvement en translation selon une direction radiale sensiblement orthogonale à l'axe longitudinal de la tête de coupe 220. Il va cependant de soi que, par une modification simple à la portée de l'homme de l'art, ce mouvement pourrait être un mouvement de pivotement autour d'un axe lié à la tête de coupe.In this embodiment, the auger is constituted by a cutting
La tête de coupe 220 comprend une partie supérieure 222 et une partie inférieure 224. L'extrémité inférieure 222b de la tête de coupe est reliée à un train de tiges à pale par des moyens de connexion 226. L'extrémité inférieure 222b de la partie supérieure est prolongée vers le bas par une extension tubulaire 228. La partie supérieure 222 est constituée par un corps cylindrique 230 et une pale 232.The cutting
La partie inférieure 224 a la forme générale d'une tige creuse cylindrique 234 munie d'une pale 236. L'extension 218 de la partie inférieure 222 est montée coulissante dans la tige creuse 234 de la partie inférieure 224.The
La partie inférieure 224 est reliée à la partie supérieure 222 par des moyens de connexion 238. Les moyens de connexion 238 solidarisent en rotation les parties 222 et 224 et autorisent un mouvement relatif en translation des parties 222 et 224 d'amplitude limitée.The
L'extrémité inférieure 224a de la partie inférieure 224 est munie d'un ergot mobile (ou dent de coupe) 240. L'ergot 240 est relié à des moyens de déplacement 242 pour déplacer l'ergot.The
L'extrémité inférieure 228a de l'extrémité tubulaire 228 est munie de moyens de commande 244.The
Les moyens de commande 244 coopèrent avec les moyens de déplacement 242.The control means 244 cooperate with the displacement means 242.
Comme on l'expliquera plus en détails ultérieurement, lorsque la partie supérieure 222 est en appui sur l'extrémité supérieure 224b de la partie inférieure, l'ergot 240 est dans sa position rétractée représentée sur la
En se référant maintenant aux
Ainsi que le montrent les
L'extrémité supérieure 246a de l'organe femelle est munie d'une bague de retenue 250 solidaire de la boîte d'entraînement femelle 246 et fait saillie hors de la paroi interne 246c de la boîte d'entraînement 246. La paroi externe 248c de l'organe mâle 248 est munie d'un épaulement 252 qui coopère avec la bague de retenue 250.The
Lorsque la partie supérieure 222 est écartée de la partie inférieure 224, l'amplitude du déplacement est limitée par la coopération de la bague 250 et de l'épaulement 252.When the
En se référant maintenant aux
A proximité de l'extrémité inférieure 224a de la partie inférieure, un volume protégé 254 est limité par l'hélice 256 de la pale, par une paroi latérale 258 et par une plaque inférieure 259. Dans le volume 254, un tube guide 260 à axe horizontal est fixé sur la tige 234 de la partie inférieure 224. Le tube 260 s'étend radialement. Un piston 262 est monté coulissant dans ce tube. L'ergot 240 est fixé à une première extrémité 262a du piston. La deuxième extrémité du piston a la forme d'une surface inclinée 264.Near the
L'extrémité inférieure de la tige 234 est munie d'une fente 266 dans laquelle un organe de commande en forme de coin 268 peut se déplacer verticalement. Le coin 268 est fixé sur l'extrémité inférieure de l'extension 228. Un déplacement vertical de l'extension 228 est converti en un mouvement horizontal de l'ergot 240 par la coopération de la surface 264 et du coin 268. Lorsque le coin 268 ne coopère pas avec la surface 264, un système de rappel constitué par le levier 270 relié au piston 262 et un ressort de rappel 272 provoque le retrait de l'ergot 240.The lower end of the
Le fonctionnement de ce cinquième mode de réalisation de l'invention est le suivant :
- Lorsque la tête de coupe 220 a un mouvement de descente et de rotation pour réaliser le forage, la partie supérieure 222 est en appui sur la partie inférieure 224.
L'extension 228 est en position basse dans la tige 234 de la partie inférieure 224 et le coin 268 n'agit pas sur lasurface inclinée 264.L'ergot 240 est maintenu dans sa position rétractée. - Lorsque la tête de coupe 220 a un mouvement ascendant, les parties supérieure 222 et inférieure 224 sont écartées l'une de l'autre.
Le coin 268 occupe une position haute et agit sur lasurface inclinée 264 dupiston 262.L'ergot 240 est amené dans sa position "sortie" et est maintenu dans cette position aussi longtemps qu'une traction est exercée sur la partie supérieure 222 de la tête de coupe.
- When the cutting
head 220 has a movement of descent and rotation to carry out the drilling, theupper part 222 bears on thelower part 224. Theextension 228 is in the lower position in therod 234 of thelower part 224 and thewedge 268 does not act on theinclined surface 264. Thelug 240 is held in its retracted position. - When the cutting
head 220 has an upward movement, the upper 222 and lower 224 are spaced from each other. Thewedge 268 occupies a high position and acts on theinclined surface 264 of thepiston 262. Thelug 240 is brought into its "out" position and is held in this position as long as traction is exerted on theupper portion 222 of the cutting head.
Claims (17)
- An auger (30) for making a borehole that presents in its inside wall a groove (36) that is substantially helical, said auger comprising:- a hollow core (100) having a longitudinal axis;- at least one helical blade (34) mounted on the outside face of the core;- a movable cutter gouge (42) suitable for taking up an active position in which the gouge projects outside the volume defined by the periphery of the blade and a retracted position in which it is disposed inside said volume; and- displacement means (152, 154) for displacing said gouge from its retracted position to its active position;said auger being characterized in that:- said helical blade extends over at least a substantial fraction of the length of the core;- said displacement means comprise:· an additional member (150) mounted to move in said core in translation along said longitudinal axis and/or in rotation about said longitudinal axis and disposed at least at the bottom end of said core; and. control means (162) for causing said gouge to be displaced from its retracted position to its active position in response to said additional member moving relative to at least the bottom portion of said hollow core.
- An auger (30) according to claim 1, characterized in that said additional member (150) is a tubular element extending over the entire length of the core of the auger and having a top end connected to a pipe for feeding a slurry under pressure and whose bottom end is provided with at least one orifice for enabling the slurry to be injected into the borehole.
- An auger (30) according to claim 2, characterized in that said tubular element (150) is movable in translation in said core, and in that said control means (162) cause the gouge to be displaced from its retracted position to its active position in response to the movement in translation of said tubular element.
- An auger (30) according to claim 2, characterized in that said tubular element (150) is movable in rotation in said core, and in that said control means cause the gouge to be displaced from its retraced position to its active position in response to said tubular element turning.
- An auger (30) according to any one of claims 2 to 4, characterized in that said tubular element (150) is a dip tube which is movable in translation in said hollow core between a retracted position in which the bottom end of the dip tube closes the bottom end of the core of the auger, and an extended position in which the bottom end of the dip tube projects from the bottom end of the auger (30).
- An auger (30) according to claim 5, characterized in that said gouge (42) is mounted to pivot about an axis that is substantially parallel to the axis of the core (100), and in that the control means (162) comprise a movable piston (240) mounted at the bottom end of the core of the auger, occupying a first position for a first position of the dip tube relative to the core of the auger, and a second position for a second position of the dip tube (150) relative to the core of the auger, said piston in its first position feeding a first actuator that acts on the movable gouge so as to bring it into its first position, and in its second position feeding a second actuator acting on the movable gouge (42) so as to bring it into its second position.
- An auger (30) according to claim 5, characterized in that said gouge (42) is mounted to pivot about an axis substantially parallel to the axis of the core (100), and in that the control means (162) comprise a ring mounted to turn about the dip tube (150) and prevented from moving in translation relative to the core of the auger, said ring being secured to a control finger suitable for co-operating with a helical slot formed in the dip tube or said movable part, whereby movement in translation of the dip tube or said movable part is converted into movement in rotation of said ring, said ring including at least a portion that is toothed and suitable for co-operating with a toothed portion of the movable gouge.
- An auger (30) according to claim 5, characterized in that said gouge (42) is mounted to pivot about an axis substantially parallel to the axis of the core (100), and in that the dip tube (150) is movable in rotation and the control means (162) comprise a set-back portion formed in the outside face of the dip tube (150) over a fraction of its periphery, and two pushers (152, 154) slidably mounted in the core (100) of the auger (30), each pusher having a first end in contact with the outside face of the dip tube (150) or the movable part, and a second end in contact with said movable gouge (42), whereby the dip tube (150) turning relative to the core of the auger causes said pushers to be displaced so as to cause the movable gouge to pivot in one direction or the other.
- An auger (30) according to claim 1, characterized in that said additional member (150) is a tube segment mounted to move in translation and/or in rotation in the hollow core (100) of the auger (30), at its bottom end.
- An auger (30) according to claim 9, characterized in that said tube segment is mounted to move in translation inside the core (100) of the auger, and in that said control means (162) cause the gouge (42) to be displaced from its retracted position to its active position in response to the displacement of the tube segment.
- An auger (30) according to claim 10, characterized in that the control means (162) comprise a movable piston (240) mounted at the bottom end of the core of the auger, occupying a first position for a first position of said tube segment relative to the core of the auger, and a second position for a second position of said tube segment relative to the core of the auger, said piston (240) in its first position feeding a first actuator that acts on the movable gouge (42) to bring it into its first position, and in its second position feeding a second actuator acting on the movable gouge (42) to bring it into its second position.
- An auger (30) according to claim 10, characterized in that said gouge (42) is mounted to pivot about an axis substantially parallel to the axis of the core (100), and in that the control means (162) comprise a ring mounted to turn about the tube segment and prevent it from moving in translation relative to the core (100) of the auger, said ring being secured to a control finger suitable for co-operating with a helical slot formed in said movable tube segment whereby movement in translation of the tube segment or movable part is converted into movement in rotation of said ring, said ring including at least a portion that is toothed, suitable for co-operating with a toothed portion of the movable gouge.
- An auger (30) according to claim 9, characterized in that said tube portion is movable in rotation inside the core (100) of the auger, and in that said control means (162) cause the gouge (42) to be displaced from its retracted position to its active position in response to the movement in rotation of said tube portion.
- An auger (30) according to claim 10, characterized in that said gouge (42) is mounted to pivot about an axis substantially parallel to the axis of the core (100), and in that the control means (162) comprise a set-back portion formed in the outside face of the tube portion over a fraction of its periphery, and two pushers (152, 154) slidably mounted in the core (100) of the auger, each pusher having a first end in contact with the outer face of the tube segment and a second end in contact with said movable gouge, whereby the tube segment turning relative to the core of the auger causes said pushers to be displaced so as to cause the movable gouge (42) to pivot in one direction or the other.
- An auger (30) according to claim 1, characterized in that the core (100) of said auger (30) comprises a top portion and a bottom portion that is movable in translation relative to said top portion over a predetermined length, said gouge (42) being mounted on said bottom portion, in that said additional member (150) comprises a tubular part secured to the bottom end of the top portion of said core and penetrating inside said bottom portion of the hollow core, and in that said control means are mounted on said tubular part in such a manner that displacement of said bottom portion of the core in translation relative to said tubular part causes the gouge to be displaced from its retracted position to its active position.
- An auger (30) according to claim 15, characterized in that it further includes means for constraining said top and bottom portions of the core relative to each other in rotation.
- An auger (30) according to claim 16, characterized in that said gouge (42) is movable in translation along a radial direction.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PL06117715T PL1748108T3 (en) | 2005-07-28 | 2006-07-24 | Auger for piling |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0508057A FR2889241B1 (en) | 2005-07-28 | 2005-07-28 | TARIERE A MOBILE ERGOT |
GB0607612A GB2440939B (en) | 2006-04-18 | 2006-04-18 | Cutting head provided with threading means |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1748108A1 EP1748108A1 (en) | 2007-01-31 |
EP1748108B1 true EP1748108B1 (en) | 2010-09-08 |
Family
ID=37441280
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP06117715A Active EP1748108B1 (en) | 2005-07-28 | 2006-07-24 | Auger for piling |
Country Status (6)
Country | Link |
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US (1) | US7591329B2 (en) |
EP (1) | EP1748108B1 (en) |
KR (1) | KR101355053B1 (en) |
AT (1) | ATE480670T1 (en) |
DE (1) | DE602006016690D1 (en) |
PL (1) | PL1748108T3 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102012109333A1 (en) * | 2012-10-01 | 2014-04-03 | Götz Hudelmaier | Excavation device for forming hollow space in base for producing in-situ concrete structure, and for use in system, has unit for selective generation of expansion of hollow space perpendicular to rotation axis |
Families Citing this family (16)
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US8926228B2 (en) * | 2006-09-08 | 2015-01-06 | Ben Stroyer | Auger grouted displacement pile |
US7748479B2 (en) * | 2008-05-29 | 2010-07-06 | Barbera James S | Box gusseted earth auger |
US8196681B2 (en) * | 2008-06-09 | 2012-06-12 | Thad Bick | Earth boring device |
WO2010027274A1 (en) * | 2008-09-08 | 2010-03-11 | Sinvent As | An apparatus and method for modifying the sidewalls of a borehole |
IT1394001B1 (en) * | 2009-04-20 | 2012-05-17 | Soilmec Spa | EXCAVATION AND CONSTIPATION EQUIPMENT FOR BUILDING SCREW POLES. |
IT1394002B1 (en) * | 2009-04-21 | 2012-05-17 | Soilmec Spa | EXCAVATION AND CONSTIPATION EQUIPMENT FOR BUILDING SCREW POLES. |
US9995087B2 (en) * | 2012-01-19 | 2018-06-12 | Frankie A. R. Queen | Direct torque helical displacement well and hydrostatic liquid pressure relief device |
US9366084B2 (en) * | 2012-01-19 | 2016-06-14 | Frankie A. R. Queen | Direct torque helical displacement well and hydrostatic liquid pressure relief device |
GB2506235B (en) * | 2012-07-05 | 2017-07-05 | Arnold Tunget Bruce | Apparatus and method for cultivating a downhole surface |
US20140301791A1 (en) * | 2013-03-15 | 2014-10-09 | Edick Shahnazarian | Telescopic Foundation Screw Pile with Continuously Tapered Pile Body |
BE1021912B1 (en) * | 2014-06-19 | 2016-01-26 | Jde Funderingstechniek Bvba | DRILLING DEVICE FOR MANUFACTURING A FOUNDATION POLE |
US9523241B2 (en) | 2014-12-30 | 2016-12-20 | Halliburton Energy Services, Inc. | Multi shot activation system |
AT15492U1 (en) * | 2016-05-20 | 2017-10-15 | Dywidag-Systems Int Gmbh | Method for impact or rotary impact drilling of holes and simultaneous profiling of borehole walls in earth, soil or rock material |
US10161096B2 (en) * | 2016-05-31 | 2018-12-25 | Soletanche Freyssinet | Ground reinforcing device |
US20190234146A1 (en) * | 2016-10-11 | 2019-08-01 | Halliburton Energy Services, Inc. | Automatic bonding system for grounding mobile equipment |
EP3784839A4 (en) | 2018-04-25 | 2022-02-09 | PPX Technology Pty Ltd | Tool and method for forming piles |
Family Cites Families (13)
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DE2709030C2 (en) * | 1977-03-02 | 1985-05-15 | Stahl- Und Apparatebau Hans Leffer Gmbh, 6602 Dudweiler | Rotary drill bit with swivel blades |
US4565252A (en) * | 1984-03-08 | 1986-01-21 | Lor, Inc. | Borehole operating tool with fluid circulation through arms |
GB2183703A (en) * | 1985-08-22 | 1987-06-10 | Cementation Piling & Found | In situ concrete pile construction and under cutting tool |
JPH0786231B2 (en) * | 1988-05-24 | 1995-09-20 | 東扇アサノポール株式会社 | How to build an enlarged bulb for large diameter piles |
WO1994002687A1 (en) * | 1992-07-24 | 1994-02-03 | Wagstaff Piling Pty. Ltd. | Apparatus and method for forming piles |
JP3222973B2 (en) * | 1992-11-25 | 2001-10-29 | ヨーコン株式会社 | Expanded drilling rig |
CA2115004A1 (en) * | 1994-02-04 | 1995-08-05 | Vern Arthur Hult | Pilot bit for use in auger bit assembly |
JP3046194B2 (en) * | 1994-02-09 | 2000-05-29 | 鹿島建設株式会社 | Auger bit |
GB9620251D0 (en) * | 1996-09-26 | 1996-11-13 | Cementation Piling & Found | Bearing capacity enhancement for piling applications |
GB2377235A (en) * | 2001-07-17 | 2003-01-08 | Cie Du Sol | Drilling tool |
GB2400869B (en) * | 2003-04-22 | 2006-11-15 | Cie Du Sol | Threading equipment |
FR2854179B1 (en) * | 2003-04-23 | 2005-07-15 | Cie Du Sol | TARGET SYSTEM IN ERGOT |
US6991046B2 (en) * | 2003-11-03 | 2006-01-31 | Reedhycalog, L.P. | Expandable eccentric reamer and method of use in drilling |
-
2006
- 2006-07-24 DE DE602006016690T patent/DE602006016690D1/en active Active
- 2006-07-24 EP EP06117715A patent/EP1748108B1/en active Active
- 2006-07-24 PL PL06117715T patent/PL1748108T3/en unknown
- 2006-07-24 AT AT06117715T patent/ATE480670T1/en not_active IP Right Cessation
- 2006-07-27 KR KR1020060070610A patent/KR101355053B1/en active IP Right Grant
- 2006-07-27 US US11/493,706 patent/US7591329B2/en active Active
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102012109333A1 (en) * | 2012-10-01 | 2014-04-03 | Götz Hudelmaier | Excavation device for forming hollow space in base for producing in-situ concrete structure, and for use in system, has unit for selective generation of expansion of hollow space perpendicular to rotation axis |
Also Published As
Publication number | Publication date |
---|---|
ATE480670T1 (en) | 2010-09-15 |
PL1748108T3 (en) | 2011-03-31 |
KR20070015015A (en) | 2007-02-01 |
US7591329B2 (en) | 2009-09-22 |
KR101355053B1 (en) | 2014-01-24 |
EP1748108A1 (en) | 2007-01-31 |
DE602006016690D1 (en) | 2010-10-21 |
US20070023207A1 (en) | 2007-02-01 |
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