EP2146046A1 - Tête de forage pour un dispositif de forage destiné à la création de trous de forage dans un sol de fondation insuffisamment portant - Google Patents

Tête de forage pour un dispositif de forage destiné à la création de trous de forage dans un sol de fondation insuffisamment portant Download PDF

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Publication number
EP2146046A1
EP2146046A1 EP08160413A EP08160413A EP2146046A1 EP 2146046 A1 EP2146046 A1 EP 2146046A1 EP 08160413 A EP08160413 A EP 08160413A EP 08160413 A EP08160413 A EP 08160413A EP 2146046 A1 EP2146046 A1 EP 2146046A1
Authority
EP
European Patent Office
Prior art keywords
drill
base plate
drill head
plate
head
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.)
Granted
Application number
EP08160413A
Other languages
German (de)
English (en)
Other versions
EP2146046B1 (fr
Inventor
Daniel Leuenberger
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.)
Marti Gruendungstechnik AG
Original Assignee
Marti Gruendungstechnik AG
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
Application filed by Marti Gruendungstechnik AG filed Critical Marti Gruendungstechnik AG
Priority to PL08160413T priority Critical patent/PL2146046T3/pl
Priority to EP08160413.4A priority patent/EP2146046B1/fr
Publication of EP2146046A1 publication Critical patent/EP2146046A1/fr
Application granted granted Critical
Publication of EP2146046B1 publication Critical patent/EP2146046B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • EFIXED CONSTRUCTIONS
    • E21EARTH OR ROCK DRILLING; MINING
    • E21BEARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B10/00Drill bits
    • E21B10/62Drill bits characterised by parts, e.g. cutting elements, which are detachable or adjustable
    • E21B10/627Drill bits characterised by parts, e.g. cutting elements, which are detachable or adjustable with plural detachable cutting elements
    • E21B10/633Drill bits characterised by parts, e.g. cutting elements, which are detachable or adjustable with plural detachable cutting elements independently detachable

Definitions

  • the present invention relates to a drill head for a drilling device for creating wells in unsustainable soil by displacing the soil material, which drill head can be placed on a drill pipe of the drilling device and forms with the drill pipe a secured against rotation, releasable connection, and which drill head the End of the drill pipe concludes.
  • a steel pipe referred to below as a drill pipe
  • Bohkopf and drill pipe are connected to each other secure against rotation.
  • this drill pipe is screwed under high vertical pressure to the required depth in the soil, the soil material is displaced by the volume of the drill pipe.
  • a prefabricated pile reinforcement is inserted into the drill pipe and the pipe filled with concrete. Subsequently, the drill pipe is retracted under constant rotation. The drill head separates from the drill pipe and remains in the ground.
  • Such drill heads are known in many ways. For example, shows the EP-A 1 279 793 a drill head made of cast steel and having a conical shape which is helical. Such a drill head, which can be used only once, is relatively expensive to produce, in addition, it has a relatively high weight and, accordingly, the transport of such drill heads from the production site to the construction site is complex and takes up a lot of space.
  • the object of the present invention is therefore to design a drill head so that it can be produced with little effort and cost, that it has a low weight and can be stored and transported to save space.
  • the solution of this object is achieved in that the drill head has a base plate with which the Bohrrohrende is closed, on which base plate at least one substantially perpendicular thereto aligned drill head plate is placed, which drill head plate is equipped with cams, which cam by corresponding to the base plate protruding recesses protrude and which drill head plate is connected to the base plate via connecting means.
  • Such a drill head thus consists of a few plate-like structures, which can be produced very easily and inexpensively, these plate-shaped structures can be assembled directly on site depending on what are used for connecting means, whereby the transport is greatly simplified.
  • the side edges of the at least one drill head plate project over the peripheral edge of the base plate. Since the diameter of the base plate corresponds at least to the outer diameter of the drill pipe, the soil is displaced so far during the drilling process that sufficient clearance is formed between the drill hole and the drill pipe so that the friction between drill pipe and borehole can be minimized.
  • a further advantageous embodiment of the invention is that the cams of the at least one drill head plate on the Bohrrohrseite above the base plate are prominent and protrude into accordance with the Bohrrohrende mounted slots.
  • a further advantageous embodiment of the invention is that the connecting means consist of hook-shaped projections attached to the cam, so that wedges can be inserted between these hook-shaped projections and the base plate.
  • the drill head can be assembled in the simplest way on site, the connection between the base plate and drill head plates is very stable.
  • the invention can also be configured such that the connecting means consist of recesses mounted on the cam, in which at least one retaining clip can be inserted, which is supported on the base plate, whereby another simple connection between the base plate and drill head plate can be achieved.
  • the at least one drill head plate is equipped with a centrally arranged additional cam, which is also projecting over the base plate and which is provided with indentations, in which a headband can be inserted, which is supported on the base plate. This also gives a simple connection.
  • the base plate is configured such that two drill head plates are placed on this, which drill head plates are provided with slot-shaped recesses such that the drill head plates are crosswise nestable. This achieves a further embodiment of the drill head.
  • the cams of those drill head plate are provided with hook-shaped projections, wherein in the assembled state of the two drill head plates with the base plate, the slot-shaped recess is directed against the base plate.
  • the drill head plates can be made by cutting from a commercially available steel plate, whereby a cost-effective and easy production can be achieved.
  • a further advantageous embodiment of the invention consists in that the form of the drill head plates forming the drill bit can be adapted to the properties of the soil to be drilled. Depending on the nature of the soil, the plates can be provided with a pointed angle forming drill head tip, the tip can also be obtuse, it can be provided rounding, the most appropriate form of these drill head plates can be found for example by experiment.
  • This drill head 1 comprises a base plate 2, which is circular.
  • This base plate is provided with two recesses 3, which are rectangular in shape and lie on a diameter of the base plate 2.
  • This drill head 1 shown here comprises a drill head plate 4, which consists of a base body 5 which is rectangular in shape and on which two cams 6 are mounted.
  • the drill head plate 4 is placed on the base plate 2, wherein the cams 6 protrude through the recesses 3 of the base plate 2, as is made Fig. 2 is apparent.
  • the drill head plate 4 is connected to the base plate 2.
  • connecting means 7 are provided, which consist of hook-shaped projections 8 which are attached to the cam 6.
  • wedges 9 can be used, whereby the drill head plate 4 is held on the base plate 2.
  • the end portion 10 of the drill pipe 11 can be placed on the thus assembled drill head 1.
  • 11 slots 12 are mounted on the end portion 10 of the drill pipe into which project beyond the base plate 2 projecting cam 6 of the drill head plate 4. Thereby, the rotational movement of the drill pipe 11 is transferred in an optimal manner to the drill head plate 4 during the drilling process.
  • the diameter of the base plate 2 is slightly larger than the outer diameter of the end portion 10 of the drill pipe 11.
  • the side edges of the drill head plate 4 project beyond the peripheral edge of the base plate 2. This will make the diameter the bore produced in the soil larger than the diameter of the drill pipe, whereby the friction between the bore wall and drill pipe can be kept low during pipe retraction.
  • the base plate 2 and the drill head plate 4 can be produced in a simple manner in which they are cut out of commercially available steel plates.
  • the base plate 2 may have a thickness of, for example, about 10 mm with a bore diameter of about 500 mm, since this only has to close the end region of the drill pipe 11, while the thickness of the drill head plate 4 may be about 30 mm.
  • the connecting means 7 consist of wedges 9, which allows easy assembly of the drill head of base plate 2 and drill head plate 4 at the site for this drill head.
  • the drill head can be delivered in individual parts, which greatly facilitates handling and space requirements.
  • the drill head 1 in turn consists of a base plate 2 which is provided with four recesses 3, which are each arranged at 90 ° on the circular base plate.
  • the drill head plate 4 is held by the nesting with the drill head plate 4 'via these connecting means 7 also on the base plate 2, for the drill head plate 4 thus the cam 6 need not be provided with hook-shaped projections, as is apparent from Fig. 6 is apparent.
  • the diameter of the base plate 2 is slightly larger than the diameter of the drill pipe 11, the drill head plates 4 and 4 'are laterally above the base plate 2 above, also here at the end portion 10 of the drill pipe wedges 11 can be added.
  • Fig. 4 to 8 can be removed, the base body 5 and 5 'of the drill head plates 4 and 4' against the well plate toward a tapered region.
  • the shaping of these tips may be formed depending on the soil to be drilled, depending on the ground conditions of the soil to be drilled, the shape designs may be different, which is advantageously determined by experiments.
  • FIGS. 9 and 10 show a drill head 1, which in turn is formed from two drill head plates 4 and 4 'and a base plate 2.
  • a headband 18 is inserted such that in each case one leg 19 of this retaining clip 18 comes to rest in a recess 17 of a respective cam 6 and the drill head plate 4 'and thus the drill head plate 4, as has been described for the previously illustrated embodiment , are attached to the base plate 2.
  • the retaining bracket 18 may be made of a metallic rod by appropriate bending.
  • FIGS. 11 and 12 a further variant of a connection between the drill head plates 4 and 4 'with the base plate 2 is shown.
  • the drill head plate 4 ' is in this case equipped with an additional, centrally arranged cam 20, which protrudes through a corresponding recess in the base plate 2 and on whose two opposite sides in each case a recess 17 is attached.
  • a headband 18 is inserted such that in each case a leg 19 of this retaining clip 18 comes to lie in one of the indentations 17 of this additional cam 20 and the drill head plate 4 'and
  • the retaining bracket 18 may in turn be formed from a bent metallic rod.
  • FIGS. 13 and 14 Another possibility for connection between the drill head plates 4 and 4 'and the base plate 2 is the FIGS. 13 and 14 removable.
  • the drill head plate 4 ' is provided with an additional, centrally arranged cam 20, which, as in the previously described variant, is provided with indentations 17.
  • indentations 17 are also attached to the two cams 6 of this drill head plate 4 ', according to the variant according to FIG FIGS. 9 and 10 ,
  • two headband 18 and 18 ' can be used so that in each case one leg 19 of each retaining bracket 18 and 18' in the recess 17 of a cam 6 comes to rest, while the other leg 19 of each retaining bracket 18 and 18 'in a Dent 17 of the additional cam 20 comes to rest.
  • the headband 18 and 18'jeweils be formed from a correspondingly bent metallic rod.
  • a headband 18 may also be designed such that it is in use in all four indentations.
  • the base plate 2 and the drill head plates 4 and 4 ' can be cut in a simple manner from commercially available steel plates, as described in the first embodiment.
  • the drill heads 1 can be transported in a simple and space-saving manner to the place of use and assembled on site, which facilitates their handling.
  • drilling heads can be produced in a simple manner, which are suitable for creating wells in unsustainable soil, in which holes then concrete piles are created, the drill heads remain in the ground.
  • Drilling heads also cost-effective.
  • shape of the drilling area of these drill heads can be designed in many ways, depending on the ground conditions of the soil, in which these holes are to be attached.

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Earth Drilling (AREA)
EP08160413.4A 2008-07-15 2008-07-15 Tête de forage pour un dispositif de forage destiné à la création de trous de forage dans un sol de fondation insuffisamment portant Active EP2146046B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PL08160413T PL2146046T3 (pl) 2008-07-15 2008-07-15 Głowica wiertnicza dla urządzenia wiertniczego do wykonywania otworów w gruncie budowlanym o niedostatecznej nośności
EP08160413.4A EP2146046B1 (fr) 2008-07-15 2008-07-15 Tête de forage pour un dispositif de forage destiné à la création de trous de forage dans un sol de fondation insuffisamment portant

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP08160413.4A EP2146046B1 (fr) 2008-07-15 2008-07-15 Tête de forage pour un dispositif de forage destiné à la création de trous de forage dans un sol de fondation insuffisamment portant

Publications (2)

Publication Number Publication Date
EP2146046A1 true EP2146046A1 (fr) 2010-01-20
EP2146046B1 EP2146046B1 (fr) 2014-04-09

Family

ID=40637267

Family Applications (1)

Application Number Title Priority Date Filing Date
EP08160413.4A Active EP2146046B1 (fr) 2008-07-15 2008-07-15 Tête de forage pour un dispositif de forage destiné à la création de trous de forage dans un sol de fondation insuffisamment portant

Country Status (2)

Country Link
EP (1) EP2146046B1 (fr)
PL (1) PL2146046T3 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3216974A1 (fr) 2016-03-10 2017-09-13 Marti Gründungstechnik AG Tete de forage pour un dispositif de forage destine a la creation de trous de forage dans un sol de fondation insuffisamment porteur
US10337253B2 (en) 2017-06-22 2019-07-02 Marti Gründungstechnik Ag Drill head for a drilling device for creating drill holes in insufficiently stable foundation
EP3771774A1 (fr) * 2019-07-30 2021-02-03 Marti Gründungstechnik AG Tête de forage, cage d'armature et unité de forage destinée à la fabrication de pieux
EP4227467A1 (fr) * 2022-02-09 2023-08-16 Marti Gründungstechnik AG Mèche de forage pour un dispositif de forage permettant de créer des trous de forage dans un terrain de fondation

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3898895A (en) * 1974-01-14 1975-08-12 Thomas L Taylor Method of attaching teeth to an earth drilling tool
GB2354023A (en) * 1999-09-10 2001-03-14 Kvaerner Cementation Found Ltd Displacement hole forming tool
EP1279793A1 (fr) 2001-07-26 2003-01-29 Beheersmaatschappij Verstraeten B.V. Tête de forage
EP1860274A1 (fr) 2006-04-26 2007-11-28 BAUER Maschinen GmbH Pointe de forage

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3898895A (en) * 1974-01-14 1975-08-12 Thomas L Taylor Method of attaching teeth to an earth drilling tool
GB2354023A (en) * 1999-09-10 2001-03-14 Kvaerner Cementation Found Ltd Displacement hole forming tool
EP1279793A1 (fr) 2001-07-26 2003-01-29 Beheersmaatschappij Verstraeten B.V. Tête de forage
EP1860274A1 (fr) 2006-04-26 2007-11-28 BAUER Maschinen GmbH Pointe de forage

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3216974A1 (fr) 2016-03-10 2017-09-13 Marti Gründungstechnik AG Tete de forage pour un dispositif de forage destine a la creation de trous de forage dans un sol de fondation insuffisamment porteur
US10337253B2 (en) 2017-06-22 2019-07-02 Marti Gründungstechnik Ag Drill head for a drilling device for creating drill holes in insufficiently stable foundation
EP3771774A1 (fr) * 2019-07-30 2021-02-03 Marti Gründungstechnik AG Tête de forage, cage d'armature et unité de forage destinée à la fabrication de pieux
CH716469A1 (de) * 2019-07-30 2021-02-15 Marti Gruendungstechnik Ag Bohrkopf, Bewehrungskorb und Bohreinheit zur Herstellung von Pfählen.
EP4227467A1 (fr) * 2022-02-09 2023-08-16 Marti Gründungstechnik AG Mèche de forage pour un dispositif de forage permettant de créer des trous de forage dans un terrain de fondation

Also Published As

Publication number Publication date
EP2146046B1 (fr) 2014-04-09
PL2146046T3 (pl) 2014-09-30

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