EP2843138B1 - Procédé et dispositif destinés à la fabrication de poteaux de sol - Google Patents

Procédé et dispositif destinés à la fabrication de poteaux de sol Download PDF

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Publication number
EP2843138B1
EP2843138B1 EP13182106.8A EP13182106A EP2843138B1 EP 2843138 B1 EP2843138 B1 EP 2843138B1 EP 13182106 A EP13182106 A EP 13182106A EP 2843138 B1 EP2843138 B1 EP 2843138B1
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EP
European Patent Office
Prior art keywords
tool
drilling tool
drilling
depth
expanding
Prior art date
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Active
Application number
EP13182106.8A
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German (de)
English (en)
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EP2843138A1 (fr
Inventor
Andreas Wieland
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Keller Holding GmbH
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Keller Holding GmbH
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Publication date
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Priority to EP13182106.8A priority Critical patent/EP2843138B1/fr
Publication of EP2843138A1 publication Critical patent/EP2843138A1/fr
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Publication of EP2843138B1 publication Critical patent/EP2843138B1/fr
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    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D7/00—Methods or apparatus for placing sheet pile bulkheads, piles, mouldpipes, or other moulds
    • E02D7/28—Placing of hollow pipes or mould pipes by means arranged inside the piles or pipes
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D7/00—Methods or apparatus for placing sheet pile bulkheads, piles, mouldpipes, or other moulds
    • E02D7/22—Placing by screwing down

Definitions

  • the invention relates to a method and an apparatus for producing ground piles with extended pile heads.
  • an apparatus for forming an enlarged head in a locally cast pile has a collar which is releasably adapted to a lower end of a continuous threaded screw. Subsequently, the pile tool is introduced with the collar in the ground. Thereafter, the collar is decoupled from the pile tool, wherein the pile tool is then introduced without collar further into the ground until reaching the desired depth. Subsequently, the pile tool is initially retracted with simultaneous supply of concrete or mortar to the lower end of the collar and then together with the collar, while concrete is supplied to fill the cavity.
  • From the EP 1 698 731 A1 is a drilling tool for ground improvement by material columns in the ground known.
  • the columns introduced into the ground have each a lower set column portion of settable material such as mortar or cement and an upper compacted column section of rolligem material such as gravel.
  • a hollow tool is drilled with displacement of the soil and introduced the hardenable material in pulling the hollow tool out of this in the borehole.
  • the present invention has for its object to provide a method for the production of soil piles with extended pile heads, which can be carried out quickly and efficiently.
  • the object is further to propose a corresponding device, are quickly and easily produced with the ground piles with extended pile heads.
  • the solution consists in a method for producing ground piles with extended pile heads by means of a device comprising a drilling tool having a first outer diameter and a first rotary drive and an extension tool having a second outer diameter and a second rotary drive, wherein the first outer diameter is smaller than the second Outer diameter, and wherein the drilling tool is longitudinally movably guided in a tubular body of the expansion tool, comprising the steps of: drilling the expansion tool under rotary drive to a first depth T1; Drilling the drilling tool under rotating drive to a second depth T2 which is below the first depth T1, wherein the rotational speed of the expansion tool is reduced when drilling tool from the first depth T1 to the second depth T2; and pulling the drilling tool and the extension tool out of the ground with application of suspension, wherein the suspension fills a cavity formed by the tools when pulled.
  • the advantage is that the method enables soil piles with extended pile heads to be produced quickly and easily in a single operation.
  • the head of the manufactured pile has a larger diameter than the main column.
  • the introduced, for example, from a foundation of a building in the ground pile force is distributed over a larger area, so that the punctual load on the load on the ground pile structure or the bottom plate or the foundation is reduced.
  • Both tools can be sunk to individual depths independent of each other in the ground due to the separate rotary actuators, resulting in a high degree of flexibility in the creation of the ground piles.
  • the depth of the extended pile head can be adjusted individually, by appropriately lowering the expansion tool.
  • the first rotary drive which can also be referred to as the main drive
  • the second rotary drive which can also be referred to as a secondary drive
  • the sinking of the expansion tool and the drilling tool can thus be done together, whereby the respective depth depths can be adjusted by appropriately controlling the rotary drives.
  • the extension tool is propelled without feed, solely by rotating drive of the associated rotary drive, sunk.
  • this is meant that no separate linear drive is provided to bring the expansion tool in the ground. Rather, the introduction into the ground is due to the weight of the expansion tool in combination with the rotational movement of the tool.
  • the rotational speed of the rotary drive is reduced, in particular reduced to zero. By stopping the rotary motion, the expansion tool does not drill further into the ground, but remains in the depth reached T1.
  • the drilling tool and the expansion tool are sunk together to the first depth T1.
  • the two tools are at least partially lowered with temporal overlap.
  • the drilling tool and the extension tool are preferably driven in the same direction and / or preferably at the same speed.
  • the drilling tool and the expansion tool can each be driven at a speed of 15 to 30 revolutions per minute until reaching the first depth T1.
  • the expansion tool upon further drilling down of the drilling tool from the first depth T1 to the second depth T2, the expansion tool remains in the lowered position (depth T1) and, when the drilling tool recovers the first depth T1 while pulling, together with it pulled further up.
  • depth T1 When pulling the expansion tool is stationary, that is, it is not driven in rotation, so that the soil located between the flights is dug with.
  • the diameter D1 of the first cavity which later forms the enlarged column head, corresponds approximately to the largest outer diameter D9 of the expansion tool.
  • the extension tool is coupled to the drilling tool such that the drilling tool when pulling from the depth T2 up and reaching the depth T1 entrains the expansion tool and both tools are pulled together from the ground.
  • the lengthwise coupling of the two tools is effected in particular by means of a chain, one end of which is connected directly or indirectly to the expansion tool and whose other end is directly or indirectly connected to the drilling tool.
  • an indirect connection can be made for example via the respective rotary drive or slide.
  • the length of the chain is adjusted so that it tightens when pulling the drilling tool and when reaching the first depth T1, so that the further pulling the expansion tool is moved together with the drilling tool upwards.
  • the suspension preferably contains water and a hydraulic binder such as concrete or cement.
  • a hydraulic binder such as concrete or cement.
  • a device for producing pile heads in the ground comprising: a drilling tool with a tubular body and a drill bit, wherein the drilling tool has a closable outlet opening at the lower end, a first rotary drive for rotating Driving the drilling tool; an expansion tool having a tubular body, wherein the drilling tool is longitudinally displaceably guided in the tubular body of the expansion tool, a second rotary drive for rotationally driving the expansion tool; wherein the drilling tool and the extension tool are independently rotatably driven.
  • the device advantageously allows efficient production of soil columns with extended column heads in one operation, without retooling.
  • the expansion tool is coupled via connecting means with the drilling tool.
  • the connecting means may comprise a chain which is attached at least indirectly with the extension tool with a first end and at least indirectly with the drilling tool with a second end.
  • the phrase "at least indirectly” should be included as a possibility that the chain is directly or indirectly connected to the extension tool or the drilling tool, for example with the respective rotary drive or with a carriage on which the rotary drive for each tool on the mast is held.
  • the coupling of the two tools allows during the drawing in an advantageous manner that the drilling tool entrains the expansion tool when reaching the depth T1. Furthermore, when lowering a further lowering of the drilling tool relative to the expansion tool from reaching the depth T1 is possible.
  • the expansion tool is preferably designed in the form of a worm boring machine.
  • the auger fills with cuttings, which is then excavated while pulling. In this way creates a cavity whose diameter is the outer diameter of the auger.
  • the auger is externally mounted on the tubular body of the tool.
  • the tubular body is penetrated by the drilling tool.
  • the proportions of the two tools are coordinated so that the drilling tool can be passed through the tubular body of the expansion tool with radial clearance. It is advantageous if the ratio between the largest outer diameter of the drilling tool to the inner diameter of the tubular body of the expansion tool is greater than 0.9.
  • the extension tubular body may have, for example, an inner diameter of 300 mm to 500 mm, in particular of about 400 mm.
  • a largest outer diameter of the auger may for example be between 500 mm and 900 mm. The greater the difference between the inner diameter of the pipe and the outer diameter of the auger, the greater the ratio of the head diameter to the diameter of the column shaft of the ground pile to be produced.
  • the drilling tool is preferably designed in the form of a Verdrängerwebbohr réelles, with which the upcoming soil is displaced during drilling. By displacing the soil a particularly good connection between the upcoming soil and the column body is achieved.
  • the drilling tool has at its end a drill bit and an outlet opening which can be selectively opened or closed by means of a controllable closure part. Upon reaching the desired final depth, the outlet opening is opened and binder suspension filled in the cavity formed while the drilling tool is pulled upwards.
  • the drilling tool preferably has a first helical gear and a second helical gear opposite thereto above the drill bit.
  • a largest outer diameter of the drilling tool can be between 300 mm to 500 mm and in particular be about 380 mm.
  • FIGS. 1 to 5 will be described together below. It is shown a drill 2 with a device 11 according to the invention for producing pile heads in the ground.
  • the drill 2 is on a bottom surface 3 and is in the Figures 1 and 2 Side view shown.
  • a Swissklermast 4 is fixed, which has a movable support device 5, on which a drill string 6 are fixed with a drilling tool 7.
  • an extension tool 9 is further attached, which is guided along the Switzerlandklermasts 4 longitudinally displaceable.
  • the drilling tool 7 has a tubular body 15 and a drill bit 16. At a lower end of the drilling tool 7, a closable outlet opening 17 is provided, which can optionally be opened or closed with a controllable closure member 18 for dispensing suspension.
  • the drilling tool 7 is connected via the support device 5 with the Switzerland Kneklermast 4 and relative to this movable in the longitudinal direction.
  • the support device may also be referred to as a carriage.
  • a longitudinal drive can be provided for moving the carriage 5 along the mast 4. By lowering or raising the carriage 5, the drilling tool can be sunk into the ground and pulled back with the application of suspension to produce a ground pile.
  • a rotary drive 14 and a flushing head 19 are provided, which can both be moved vertically at the broker 4.
  • the rotary drive 14 and the flushing head 19 are attached to the support device 5.
  • the rotary drive 14 is used for the rotary drive of the drill pipe 7, wherein it is provided that the drill pipe 7 can be driven independently of the extension tool 9.
  • the flushing head 19, which is also referred to as a swivel, serves to connect lines 20 for introducing a settable suspension, wherein only a portion of the lines is shown.
  • the drilling tool 7 is designed in the form of a Verdrängerwebbohr réelles, with which the pending soil is displaced during drilling. Upon reaching the desired final depth, the outlet opening 17 is opened and it is, while the drilling tool 7 is pulled back up, filled binder suspension in the cavity formed by the tool by displacement. Above the drill bit 16, the drilling tool has a lower first worm gear 24 and an upper worm gear 25 opposite thereto. A largest outer diameter of the drilling tool 7 may be, for example, about 380 mm.
  • the inner tubular body 15 has a smaller inner diameter, which is about 300 may be mm.
  • the drilling tool 7 is in FIG. 3 shown in overall view. He is the tubular body 15 with the first screw 24, the adjoining above the opposite worm gear 25 and the drill bit 16 recognizable. At the lower end of a further screw 22 is provided, which is bolted to the first flight 24. As further details struts 12 and the outlet opening 17 are shown here.
  • the drilling tool 7 is attached with its upper end to the drill pipe 6, which is guided on the broker 4.
  • the borehole is created by screwing or shaking in a pure displacement process.
  • a support device 8 for supporting an extension tool 9 is also provided on the Switzerland.
  • the support device 8 for the extension tool 9 is held longitudinally displaceable on Switzerland, wherein a drive for advancing the support device 8 is not provided, but could theoretically be provided.
  • the expansion tool 9 is arranged coaxially to the drilling tool 7 and has a tubular body 26 through which the drilling tool 7 is passed, and a externally attached to the tubular body 26 Bohrschnecke 27.
  • a separate rotary drive 23 is provided as Through boring or designed as a hydraulically driven screw cleaner can be. With the rotary drive 23, the extension tool 9 is rotatably driven about the axis of rotation A9 to be introduced into the ground.
  • the two tools 7, 9 can be driven independently of one another and sink into the ground, specifically to individually adjustable depths T1, T2.
  • the drilling tool 7 and the extension tool 9 are parts of the device 11 according to the invention for the production of soil piles in the ground.
  • the extension tool 9 is designed in the form of a worm boring device, which is shown as a detail in FIG. 4 is shown.
  • the tubular body 26 with the auger 27 attached thereto on the outside and a drill bit 13 can be seen.
  • the auger drilling device 9 When screwing the auger drilling device 9 in the ground by the rotary drive 23rd fills the auger 27 with cuttings, which is then excavated when re-pulling the tool. In this way, a cavity whose diameter D1 the outer diameter of the auger 27 is formed.
  • the proportions of the two tools 7, 9 are coordinated so that the drilling tool 7 can be passed through the tubular body 27 of the expansion tool 9 with radial clearance.
  • the ratio between the largest outer diameter D7 of the drilling tool 7 to the inner diameter D9 of the tubular body 27 may be greater than 0.9 in order to obtain the smallest possible annular gap between said tools.
  • the tubular body 27 of the expansion tool 9 may for example have an inner diameter D26 of 300 mm to 500 mm, in particular of about 400 mm.
  • a largest outer diameter D27 of the auger 27 may for example be between 500 mm and 900 mm and in particular is about 700 mm.
  • connecting means 28 are provided, which may be designed in particular in the form of a chain, one end of which are connected to the drilling tool 7 and the other end to the extension tool 9.
  • the chain 28 may be attached with its lower end to the rotary drive 23 for the extension tool 9.
  • the upper end of the chain 28 is attached to the carriage 5 to which the drilling tool 7 is attached.
  • FIG. 1 shows the device 11 according to the invention with the two Tools 7, 9 in the initial state before producing a bored pile, the lower ends of the tools 7, 9 hang on the bottom edge.
  • FIG. 2 shows the device 11 in the sunken state, wherein the extension tool 9 has reached the desired end depth T1, and the drilling tool 7 has been sunk down to the underlying second depth T2 beyond.
  • FIG. 5a shows the drill 2 according to FIG. 1 in a slightly simplified representation, with the two tools 7, 9 sit on the ground level.
  • the expansion tool 9 is positioned by means of the steel chain 28 about 20 cm above the leading drill bit 16, so that the suspension exit point is approximately flush with the cutting edge 13 of the expansion tool 9.
  • FIG. 5b shows the method after performing the first step, namely after the sinking of the two tools 7, 9 to the depth T1.
  • the drilling tool 7 and the extension tool 9 lying on the outside thereof are sunk around their respective axis A7, A9 while rotating the drive.
  • the feed is effected by the main auger drive 14, while the augmentation tool 9, hanging from the chain 28, drills by gravity into the bottom 3.
  • the depth T1 provided for the extended pile head is reached, the lowering of the extension tool 9 is stopped, which is done by switching off the secondary rotary drive 23. This position is in FIG. 5b shown.
  • the drilling tool 7 and the extension tool 9 are preferably lowered together, in particular at the same speed, which may for example be 15 to 30, in particular 20 to 25 revolutions per minute, and rotating drive in the same direction of rotation. This achieves fast and efficient process management; However, it is also conceivable in principle that the tools are sunk with a time lag.
  • the drilling tool 7 is further sunk into the ground, up to the intended final depth T2, which later marks the lower end of the ground pile to be produced.
  • the pending soil is displaced by the drilling tool 7 radially outward.
  • FIG. 5c The lowering takes place by the provided for the drilling tool 7 rotary head 14 and the corresponding linear drive for the carriage 5.
  • the drilling tool 7 is the extension tool 9 still and initially remains unchanged in the depth T1.
  • FIG. 5d This third process step is in FIG. 5d shown, wherein the emerging from the drilling tool 7 suspension is recognizable.
  • the suspension contains water and a hydraulic binder such as concrete or cement.
  • the pulling takes place at defined parameters such as hydraulic pressure and speed.
  • By setting the binder results in a solid base pile 29, which can also be referred to as a column body or, in displacement of the soil by the drilling tool, as a displacement drill column.
  • the process is carried out from bottom to top, first from the depth T2 to the depth T1.
  • the renewed reaching of the depth T1 is in FIG. 5e shown.
  • the lengthwise coupling between the drilling tool 7 and the extension tool 9 is effective, so that the drilling tool 7 entrains the extension tool 9 and both tools together the last portion T1 are pulled out of the bottom 3.
  • the lengthwise coupling of the two tools 7, 9 is effected by the chain 24, with which the desired distance of the two tools 7, 9 has been set to each other before the sinking.
  • the common drawing of the two tools 7, 9 is still carried out with application of binder suspension, so that now the pile head is made with a large diameter.
  • a column body is formed with an upper first section 30 having a correspondingly larger first diameter D1 and a lower second section 31 having a correspondingly smaller diameter D2.
  • the length of the extended pile head 30 corresponds to the depth T1, to which the expansion tool 9 has been lowered, while the length of the lower column part corresponds to the difference of the depths T2 and T1.
  • the finished floor post 29 is in FIG. 5f shown.
  • the device according to the invention or the method according to the invention offers the advantage that ground piles 29 with extended pile heads 30 can be produced quickly and easily in one operation.
  • both tools 7, 9 can be driven individually rotating, so that they can be sunk to individual depths T1, T2.
  • the length of the extended pile head can be adapted to the static needs.

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  • Engineering & Computer Science (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)
  • Structural Engineering (AREA)
  • Earth Drilling (AREA)

Claims (15)

  1. Procédé de fabrication de poteaux de sol dotés de têtes de poteaux élargies, au moyen d'un dispositif (11), qui présente un outil de forage (7) ayant un premier diamètre extérieur (D7) et une première commande rotative (14), ainsi qu'un outil d'élargissement (9) ayant un second diamètre extérieur (D9) et une seconde commande rotative (23), le premier diamètre extérieur (D7) étant inférieur au second diamètre extérieur (D9), l'outil de forage (7) étant guidé de manière mobile longitudinalement dans un corps tubulaire (26) de l'outil d'élargissement (9), par les étapes opératoires suivantes :
    enfoncement de l'outil d'élargissement (9) sous rotation de la commande jusqu'à une première profondeur (T1) ;
    enfoncement de l'outil de forage (7) sous rotation de la commande jusqu'à une seconde profondeur (T2) qui se situe en-dessous de la première profondeur (T1), la vitesse de rotation de l'outil d'élargissement (9) étant réduite lors de l'enfoncement de l'outil de forage (7) de la première profondeur (T1) jusqu'à la seconde profondeur (T2) ;
    extraction de l'outil de forage (7) et de l'outil d'élargissement (9) du sol (3) en répandant une suspension, la suspension remplissant une cavité formée par l'outil de forage (7) et l'outil d'élargissement (9).
  2. Procédé selon la revendication 1,
    caractérisé en ce que
    les première et seconde commandes rotatives (14, 23) peuvent être entraînées en rotation indépendamment l'une de l'autre.
  3. Procédé selon la revendication 1 ou 2,
    caractérisé en ce que
    l'outil d'élargissement (9) est enfoncé sans entraînement vers l'avant, seulement par entraînement tournant de la seconde commande rotative (23), la vitesse de rotation de la seconde commande rotatives (23) étant réduite à zéro à l'atteinte de la première profondeur (T1).
  4. Procédé selon une des revendications 1 à 3,
    caractérisé en ce que
    l'outil de forage (7) et l'outil d'élargissement (9) sont enfoncés ensemble jusqu'à la première profondeur (T1).
  5. Procédé selon une des revendications 1 à 4,
    caractérisé en ce que
    l'outil de forage (7) et l'outil d'élargissement (9) sont entraînés dans le même sens de rotation.
  6. Procédé selon une des revendications 1 à 5,
    caractérisé en ce que
    l'outil de forage (7) et l'outil d'élargissement (9), jusqu'à l'atteinte de la première profondeur (T1),
    sont entraînés respectivement à une vitesse de 15 à 30 rotations par minute.
  7. Procédé selon une des revendications 1 à 6,
    caractérisé en ce que
    l'outil d'élargissement (9), lors de l'extraction de l'outil de forage (7) de la seconde profondeur (T2) jusqu'à la première profondeur (T1), reste dans la position enfoncée et, lorsque l'outil de forage (7) atteint à nouveau la première profondeur (T1), est tiré vers le haut avec celui-ci.
  8. Procédé selon une des revendications 1 à 7,
    caractérisé en ce que
    l'outil d'élargissement (9) est couplé à l'outil de forage (7) de manière à ce que l'outil de forage (7) lors de l'extraction depuis la profondeur (T2) vers le haut, entraîne l'outil d'élargissement (9) lorsque la profondeur (T1) est de nouveau atteinte et que les deux outils sont extraits ensemble du sol.
  9. Procédé selon une des revendications 1 à 8,
    caractérisé en ce que
    la suspension contient de l'eau et un liant hydraulique comme du béton ou du ciment, un poteau de forage étant obtenu au durcissement du liant.
  10. Dispositif de fabrication de têtes de poteaux dans le sol, comprenant :
    un outil de forage (7) doté d'un corps tubulaire (15) et d'une couronne de forage (16), l'outil de forage présentant un orifice d'évacuation fermant (17) à son extrémité inférieure,
    une première commande rotative (14) pour entraîner l'outil de forage (7) en rotation ;
    un outil d'élargissement (9) doté d'un corps tubulaire (26), l'outil de forage (7) étant guidé de manière mobile longitudinalement dans le corps tubulaire (26) de l'outil d'élargissement (9) ;
    une seconde commande rotative (23) pour entraîner l'outil d'élargissement (9) en rotation ;
    l'outil de forage (7) et l'outil d'élargissement (9) étant entraînés en rotation indépendamment l'un de l'autre.
  11. Dispositif selon la revendication 10,
    caractérisé en ce que
    l'outil d'élargissement (9) est couplé à l'aide de moyens de connexion (28) à l'outil de forage (7).
  12. Dispositif selon une des revendications 10 ou 11,
    caractérisé en ce que
    les moyens de connexion (28) comprennent une chaîne qui est fixée par une première extrémité du moins indirectement à l'outil d'élargissement (9) et par une seconde extrémité du moins indirectement à l'outil de forage (7).
  13. Dispositif selon une des revendications 10 à 12,
    caractérisé en ce que
    l'outil d'élargissement (9) est conçu sous la forme d'une foreuse rotative à vis qui présente une vis de forage (27) qui se remplit de matériau de forage lors de son enfoncement.
  14. Dispositif selon une des revendications 10 à 13,
    caractérisé en ce que
    l'outil de forage (7) est conçu sous la forme d'une foreuse rotative à refoulement à l'aide de laquelle le sol présent (3) est refoulé lors de son enfoncement.
  15. Dispositif selon une des revendications 10 à 14,
    caractérisé en ce que
    l'outil d'élargissement (9) présente un diamètre extérieur (D9) de 500 mm à 900 mm et/ou
    que le corps tubulaire (26) de l'outil d'élargissement (9) un diamètre intérieur (D26) de 300 mm à 500 mm, le plus grand diamètre (D7) de l'outil de forage (7) étant établi de manière à ce que l'outil de forage (7) puisse être guidé à travers le corps tubulaire (26) de l'outil d'élargissement (9) avec un jeu radial.
EP13182106.8A 2013-08-28 2013-08-28 Procédé et dispositif destinés à la fabrication de poteaux de sol Active EP2843138B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP13182106.8A EP2843138B1 (fr) 2013-08-28 2013-08-28 Procédé et dispositif destinés à la fabrication de poteaux de sol

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP13182106.8A EP2843138B1 (fr) 2013-08-28 2013-08-28 Procédé et dispositif destinés à la fabrication de poteaux de sol

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Publication Number Publication Date
EP2843138A1 EP2843138A1 (fr) 2015-03-04
EP2843138B1 true EP2843138B1 (fr) 2016-02-24

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Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL2018729B1 (nl) * 2017-04-18 2018-10-29 Chinforce B V Boorpunt voor een grondverdringingsboor
WO2021092437A1 (fr) 2019-11-08 2021-05-14 Ojjo, Inc. Systèmes, procédés et machines pour l'entraînement automatisé d'une vis d'ancrage
US12359389B2 (en) 2019-11-08 2025-07-15 Ojjo, Inc. Systems, methods, and machines for automated screw anchor driving
AU2021374402A1 (en) * 2020-11-06 2023-06-29 Ojjo, Inc. Systems, methods, and machines for automated screw anchor driving
WO2024261654A1 (fr) * 2023-06-23 2024-12-26 IANDOLO, Daniele Appareil et procédé pour la construction de pieux de fondation forés

Family Cites Families (3)

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Publication number Priority date Publication date Assignee Title
GB2334543B (en) 1998-02-24 2002-09-11 Kvaerner Cementation Found Ltd Method and apparatus for forming enlarged pile heads
GB2378471A (en) 2001-08-08 2003-02-12 Cementation Found Skanska Ltd Method of forming enlarged pile heads with pre-cast driven piles
EP1698731A1 (fr) 2005-03-04 2006-09-06 KELLER GRUNDBAU GmbH Outil de forage pour améliorer le terrain des fondations avec des colonnes de matériel dans le sol

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