EP0034106B1 - Bodenverdichtungs-Bohrkopf mit ebener Abschlussplatte - Google Patents

Bodenverdichtungs-Bohrkopf mit ebener Abschlussplatte Download PDF

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Publication number
EP0034106B1
EP0034106B1 EP81440005A EP81440005A EP0034106B1 EP 0034106 B1 EP0034106 B1 EP 0034106B1 EP 81440005 A EP81440005 A EP 81440005A EP 81440005 A EP81440005 A EP 81440005A EP 0034106 B1 EP0034106 B1 EP 0034106B1
Authority
EP
European Patent Office
Prior art keywords
boring bit
helical
axis
fact
drill bit
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.)
Expired
Application number
EP81440005A
Other languages
English (en)
French (fr)
Other versions
EP0034106A1 (de
Inventor
Gaspar Jozef Coelus
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Priority claimed from BE0/199306A external-priority patent/BE881598A/nl
Application filed by Individual filed Critical Individual
Priority to AT81440005T priority Critical patent/ATE4133T1/de
Publication of EP0034106A1 publication Critical patent/EP0034106A1/de
Application granted granted Critical
Publication of EP0034106B1 publication Critical patent/EP0034106B1/de
Expired legal-status Critical Current

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Classifications

    • 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
    • E02D5/36—Concrete or concrete-like piles cast in position ; Apparatus for making same making without use of mouldpipes or other moulds
    • 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

Definitions

  • the present invention relates to a drill bit intended for drilling in the ground, which acts by compressing the ground laterally in accordance with the preamble of claim 1.
  • the drill bits intended for drilling generally consist of a drilling head, extended by a tube. They have at their lower end a plug, which is released at the bottom of the borehole, which allows in particular the injection of concrete into the borehole, via the tube, as it is withdrawn.
  • the present invention proposes to remedy these drawbacks, and proposes a drill bit which has a particular shape. This shape makes it possible to close the connection tube with the ground surface by means of a simple flat plate, and yet to carry out rapid and suitable drilling.
  • the drill bit therefore lends itself particularly well to the formation of concrete foundation pillars in the ground.
  • the drill bit according to the invention is characterized in that its head has at its end two helical cylinder walls extending from the central coupling tube with an axis parallel to the axis 11 of the drill bit, facing one of the other but offset one relative to the other and relative to the axis 11 of the drill bit, arranged, taking into account the direction of rotation of the drill bit corresponding to a borehole, so as to push outwards and laterally compressing the shoe from their outer face, due to their eccentricity, the orientation of the propeller portion that they form respectively being that which corresponds to a depression of the drill bit for said rotation.
  • the drill bit consists of a central coupling tube 1, surrounded by the drill bit body 2.
  • the coupling tube is closed at the base by a closing plate 3, and is fixed at the top to the drilling tube itself 4.
  • the most characteristic elements of the drill bit body 2 are the helical cylinder walls 5 and 6, with axes respectively parallel to the axis 11 of the drill bit, but eccentric with respect to this axis 11.
  • the tube portions forming said helical walls will be called thereafter eccentric fins.
  • FIGS. 2 and 3 They are arranged so that when the drill bit is rotated in a direction of rotation corresponding to a borehole, and for example in a clockwise direction as shown by the arrow in FIG. 3, and that a force directed vertically downwards is exerted on the drill bit at the same time, the eccentric fins 5 and 6 push the earth outwards on their outside, compress the ground laterally outwards and sleep at level of their internal face of the hollow spaces 9 in which the pressure is practically zero.
  • FIGS. 2 and 3 In FIG. 2, they are delimited by the internal face of the eccentric fins 5 and 6, and by a dashed line which corresponds to the areas covered by the two eccentric fins 5 and 6 during the drill bit rotation.
  • the eccentric fins 5 and 6 are also helical.
  • the pitch of the propeller which they constitute is oriented so that a rotation of the drill bit for drilling corresponds to a "screwing" of the eccentric fins deep in the ground.
  • zone 10 On the underside of the drill bit, corresponding to zone 10, that is to say the zone which is not covered by any of the eccentric fins 5 and 6 during their displacement in rotation, there is simple contact between it this and the ground. This contact is established at a surface of the drill bit corresponding substantially to the diameter of the closure plate 3, which has a diameter equal to or less than the diameter of the helical walls, reduced by the distance separating their axes.
  • zone 10 a central core which is laterally surrounded by hollow spaces, corresponding to zones 9, that is to say to the earth repelled and compressed by the eccentric fins 5 and 6.
  • the drill bit In the case where the drill bit must be extracted from the ground after drilling, it also comprises other eccentric fins 7 and 8 arranged above the fins 5 and 6. Preferably, a cylindrical zone of revolution 12 is interposed between the fins 5 and 6 and fins 7 and 8.
  • the fins 7 and 8 are also helical, and the pitch and the orientation of the propeller portions which they constitute are substantially identical to those of the fins 5 and 6.
  • the fins 7 and 8 have an axis parallel to the axis 11, eccentric with respect thereto.
  • the eccentricity has substantially the same value as the eccentricity of the fins 5 and 6, but an opposite orientation.
  • the fins 7 and 8 therefore push the outer gap, compressing it laterally outward for a rotational movement shown diagrammatically by the arrow in FIG. 4, corresponding to an extraction of the drill bit.
  • helical flanges 13 are arranged at the outer periphery of the fins 5 and 6, of the intermediate cylinder 12, and of the fins 7 and 8. These flanges reinforce the various elements to which they are secured and also improve the grip of the drill bit in the ground at the periphery of the drill hole.
  • the eccentric fins 5 to 8 are preferably portions of cylinder of revolution. This allows for simple manufacturing, within the reach of ordinary skill in the art, and for example by mechanical welding. The cost price of the drill bit is therefore very low.
  • FIG. 5 illustrates in section a drill bit according to a variant of the invention.
  • This drill bit comprises a central tube 14, and a drill bit body 15.
  • the drill bit body 15 is intended to be left at the bottom of the borehole, and to serve as a base for the concrete pillar which will then be poured into the borehole. It therefore has a simplified structure compared to the drill bit described in FIGS. 1 to 4.
  • the coupling means between the central tube 14 and the drill bit body 15 are of any suitable type, and have been shown diagrammatically at 16.
  • a plate 17, integral with the drill bit body 15 closes off the interior zone defined by the central tube 14, when the head and tube are coupled.
  • eccentric fins 18 and 19 are located below the plate 17 below eccentric fins 18 and 19, substantially identical to the fins 5 and 6. In FIG. 5, only the parts of the fins 18 and 19 situated behind the cutting plane are visible.
  • an anchor bolt 20 of a known type is secured to the plate 17 and goes up inside the tube 14. This bolt is intended to anchor the drill bit body 15 in the concrete which will be poured then in the drilling.
  • helical flanges 21 similar to the flanges 13 are arranged at the outer periphery of the drill bit body 15.
  • FIG. 6 shows schematically the drilling operations with the drill bit according to the present invention.
  • the central drilling tube 22 is extended by a concrete tank 23.
  • the drilling tube is put in circular rotation, and is kept vertical by a machine 24 which is placed on the ground and can roll there.
  • the machine is provided with a motor 25 having sufficient power and a strong reduction, so that the drill pipe can turn slowly but with a very high torque.
  • the vertical pressure on the drill bit is also obtained by the fact that the weight of the machine is partially transmitted to the central drilling tube 22 by hydraulic cylinders 27 and by a pressure level 28.
  • the boreholes produced by means of the drill bits according to the present invention can be vertical, slightly inclined, oblique and even horizontal, when the boreholes they carry out are intended for drawing piles. In the latter case, a concrete pump is required to fill the borehole.
  • An additional advantage of the drill bits according to the present invention is that they can be formed by welding of simple shape parts of very hard steel.
  • the fins which are the most exposed to wear, can therefore also be replaced regularly without difficulty or at significant cost.

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Geology (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Structural Engineering (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Paleontology (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Earth Drilling (AREA)

Claims (9)

1. Dieses Bohrgerät für Tiefbohrungen, das mit seitlicher Bodenpressung arbeitet, besteht aus einem Bohrkörper (2, 15) und einem zentralen Kupplungsrohr (1, 14) mit verschlossenem Ende, das gemäss seiner Achse eventuell einer Krafteinwirkung unterliegt, kennzeichnet sich dadurch, dass der Bohrkopf an seinem Ende ab dem zentralen Kupplungsrohr und parallel zur Bohrerachse (11) mindestens zwei spiralförmige Zylinderwandungen (5, 6) hat, die jedoch in Bezug auf die Bohrerachse (11) gegenseitig exzentriert sind ; unter Berücksichtigung der Drehrichtung des Bohrers sind sie so angeordnet, dass sie mittels ihrer Aussenseite und infolge ihrer Exzentrierung die Erde unter seitlichem Komprimieren nach aussen drücken, während die Orientierung des von ihnen gebildeten flügelförmigen Teilses jene ist, die dem Eindringen des Bohrers in den Boden durch Drehung entspricht.
2. Bohrgerät gemäss Anspruch 1 und dadurch gekennzeichnet, dass die annähernd flache Verschlussscheibe (3) das zentrale Kupplungsrohr in einer Zone verschliesst, die durch die Drehung der zwei spiralförmigen Zylinderwandungen (5, 6) nicht überdeckt ist.
3. Bohrgerät gemäss Anspruch 2 und dadurch gekennzeichnet, dass die Verschlussscheibe (3) lösbar ist und auf dem Bohrlochgrund abgeworfen wird.
4. Bohrgerät gemäss einem der vorgenannten Ansprüche und dadurch gekennzeichnet, dass es überhalb der spiralförmigen Zylinderwandungen (5, 6) ihres Kopfes ab dem zentralen Kupplungsrohr und parallel zur Bohrerachse (11) zwei weitere spiralförmige Zylinderwandungen (7, 8) hat, welche die gleiche spiralförmige Orientierung wie die erstgenannten aufweisen, jedoch in umgekehrter Weise exzentriert sind, sodass sie infolge ihrer Exzentrierung bei der Ausziehdrehung des Bohrers mittels ihrer Aussenseite die Erde unter seitlichem Komprimieren nach aussen drücken.
5. Bohrgerät gemäss Anspruch 4 und dadurch gekennzeichnet, dass ein Rotationszylinder (12), der die gleiche Achsrichtung wie der Bohrer hat, zwischen den zwei Einheiten der spiralförmigen Zylinderwandungen (5, 6 und 7, 8) angebracht ist.
6. Bohrgerät gemäss einem der vorgenannten Ansprüche und dadurch gekennzeichnet, dass die spiralförmigen Wandungen (5 bis 8) zylindrisch und drehend sind.
7. Bohrgerät gemäss Anspruch 6 und dadurch gekennzeichnet, dass die spiralförmigen Zylinderwandungen (5 bis 8) je einen Mittelpunkswinkel von 180 Grad aufweisen.
8. Bohrgerät gemäss der Ansprüche 2, 3, 6 und dadurch gekennzeichnet, dass die Verschluss-- platte rund ist und einen Durchmesser hat, der geringer oder gleich jenem der spiralförmigen Zylinderwandungen (5, 6) ist, die um den Abstandswert verringert sind, der ihre Achsen trennt.
9. Bohrgerät gemäss Anspruch 1, das die abnehmbaren Kupplungsmittel (16) des Bohrkörpers (15) mit dem zentralen Kupplungsrohr (14) enthält und sich dadurch kennzeichnet, dass die spiralförmigen Zylinderwandungen (18, 19) mit einer Verschlussplatte (17) verbunden sind, die das zentrale Kupplungsrohr (14) verschliesst, wenn der Bohrkopf mit diesem Rohr verkuppelt ist.
EP81440005A 1980-02-07 1981-02-05 Bodenverdichtungs-Bohrkopf mit ebener Abschlussplatte Expired EP0034106B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT81440005T ATE4133T1 (de) 1980-02-07 1981-02-05 Bodenverdichtungs-bohrkopf mit ebener abschlussplatte.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BE199306 1980-02-07
BE0/199306A BE881598A (nl) 1980-02-07 1980-02-07 Verdringsboor met vlakke afsluitplaat

Publications (2)

Publication Number Publication Date
EP0034106A1 EP0034106A1 (de) 1981-08-19
EP0034106B1 true EP0034106B1 (de) 1983-07-13

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EP81440005A Expired EP0034106B1 (de) 1980-02-07 1981-02-05 Bodenverdichtungs-Bohrkopf mit ebener Abschlussplatte

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EP (1) EP0034106B1 (de)
AT (1) ATE4133T1 (de)
DE (1) DE3160575D1 (de)
FR (1) FR2475617A1 (de)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0131562B1 (de) * 1983-07-07 1986-12-10 Atlas Palen N.V. Verfahren zum Einbringen von Pfählen mit Anwendung einer Verdrängungsschraube
DE8908131U1 (de) * 1989-07-04 1990-10-31 Delmag Maschinenfabrik Reinhold Dornfeld GmbH & Co, 7300 Esslingen Kopf für einen Erdbohrer
DE4220976C1 (de) * 1992-06-26 1993-07-15 Delmag Maschinenfabrik Reinhold Dornfeld Gmbh & Co, 7300 Esslingen, De
BE1007558A5 (nl) * 1993-10-28 1995-08-01 Hareninvest Grondverdringingsboorkop voor het vormen van palen in de grond.
FR2831206B1 (fr) * 2001-10-24 2004-01-30 Cie Du Sol Outil de forage et de refoulement
CN104389525B (zh) * 2014-09-29 2017-02-01 新河县华构桩工机械厂 一种桩架前端的可升降作业平台及其操作方法

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE672746A (de) *
US2229912A (en) * 1941-01-28 Method and apparatus for displacing
FR1202851A (fr) * 1957-01-08 1960-01-14 Tarière rotative
FR1322130A (fr) * 1961-02-28 1963-03-29 Méthode et appareil pour former un pieu en béton dans le sol par forage
FR2040519A5 (de) * 1969-04-10 1971-01-22 Atlas France
FR2215075A6 (de) * 1973-01-19 1974-08-19 Atlas France

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3926267A (en) * 1974-07-31 1975-12-16 Valentin Konstant Svirschevsky Device for driving holes in the ground

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE672746A (de) *
US2229912A (en) * 1941-01-28 Method and apparatus for displacing
FR1202851A (fr) * 1957-01-08 1960-01-14 Tarière rotative
FR1322130A (fr) * 1961-02-28 1963-03-29 Méthode et appareil pour former un pieu en béton dans le sol par forage
FR2040519A5 (de) * 1969-04-10 1971-01-22 Atlas France
FR2215075A6 (de) * 1973-01-19 1974-08-19 Atlas France

Also Published As

Publication number Publication date
DE3160575D1 (en) 1983-08-18
FR2475617B1 (de) 1984-01-06
FR2475617A1 (fr) 1981-08-14
EP0034106A1 (de) 1981-08-19
ATE4133T1 (de) 1983-07-15

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