EP3190257A1 - Dispositif de forage et procede de fabrication d'un pieu fore dans le sol - Google Patents

Dispositif de forage et procede de fabrication d'un pieu fore dans le sol Download PDF

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Publication number
EP3190257A1
EP3190257A1 EP16150572.2A EP16150572A EP3190257A1 EP 3190257 A1 EP3190257 A1 EP 3190257A1 EP 16150572 A EP16150572 A EP 16150572A EP 3190257 A1 EP3190257 A1 EP 3190257A1
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EP
European Patent Office
Prior art keywords
drilling
auger
rotary
rotary bottom
drill
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
EP16150572.2A
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German (de)
English (en)
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EP3190257B1 (fr
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.)
Bauer Spezialtiefbau GmbH
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Bauer Spezialtiefbau GmbH
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.)
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Publication date
Application filed by Bauer Spezialtiefbau GmbH filed Critical Bauer Spezialtiefbau GmbH
Priority to EP16150572.2A priority Critical patent/EP3190257B1/fr
Publication of EP3190257A1 publication Critical patent/EP3190257A1/fr
Application granted granted Critical
Publication of EP3190257B1 publication Critical patent/EP3190257B1/fr
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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
    • E21B7/00—Special methods or apparatus for drilling
    • E21B7/003—Drilling with mechanical conveying means
    • E21B7/005—Drilling with mechanical conveying means with helical conveying means
    • 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 invention relates to a drilling device for producing a bored pile in a soil with a drilling auger, which is rotatably drivable and has at least one boring spiral which runs along a central core tube, a drill pipe which is drivable independently of the auger and at least partially surrounds the auger. and a rotary bottom which is rotatably disposed at a lower portion of the auger and is adjustable between a drilling position in which a passage for soil material to the drilling helix is opened and a closing position in which the passage is closed, according to the preamble of claim 1.
  • the invention further relates to a method for producing a bored pile in the ground with a boring device in which a boring screw with at least one boring spiral is rotationally driven to create a borehole in the ground, a boring pipe which at least partially surrounds the boring auger, independently of the auger is moved, a rotary bottom at the bottom of the auger in the drilling operation in a drilling position, wherein a passage is opened, passes through which soil material to the drill spiral, and the rotary bottom is moved when pulling the drilling device from the ground in a closed position, in which the rotary bottom is closed, according to the preamble of claim 12.
  • Such a drilling method is also referred to as double-head drilling.
  • Such a drilling device and such a drilling method for example, from the DE 103 59 103 A1 out.
  • the Doppelkopfbohren becomes particularly with loose Soils used, wherein the Bohrschnecke surrounding drill pipe supports the surrounding soil.
  • Upon reaching the desired final depth of a passage at the bottom of the auger is closed with a rotary bottom. This prevents that when pulling the drilling device drilled soil material from the drilling helices falls back into the wellbore.
  • filling material is introduced into the borehole through which the borehole wall is also supported.
  • the invention has for its object to provide a drilling apparatus and a method for producing a bored pile, with which a bored pile is particularly reliable and efficient to produce.
  • the drilling device is characterized in that the auger and the drill pipe are axially adjustable relative to each other between a first stroke position and a second stroke position, that in the first stroke position, the rotary bottom is in the drilling position with open passage and that in the second stroke position of the rotary bottom is arranged in its closed position with closed passage.
  • a basic idea of the invention is to set the two operating positions of the rotary base, namely on the one hand the drilling position with open passage for the soil material and the closing position on the other hand by a targeted axial movement between auger and drill pipe.
  • the closed position of the rotary bottom is locked, the passage to the drill spiral is closed.
  • a release of the closure position is possible only by a further opposite axial movement.
  • the drilling device with the rotary bottom in the closed position can be easily withdrawn from the borehole using a rotational movement, including a reversing rotary movement, without the risk of unintentional opening of a rotary bottom.
  • the drilling device can be easily withdrawn without the risk of inadvertent entry of drilled drilling material from the drilling helices into the area of the borehole.
  • a preferred embodiment of the invention is that a locking device is provided, by which a rotation of the rotary bottom is locked in its closed position in at least one direction of rotation.
  • the blocking is provided in both directions of rotation.
  • the locking device has at least one radially directed locking element on the circumference of the rotary bottom and at least one locking stop on an inner wall of the drill pipe.
  • the radially directed blocking element may be a simple pin or a nose or a radially directed stop surface on the outer circumference of the rotary bottom.
  • a plurality of locking elements are arranged distributed over the circumference.
  • the catch may have one or two stop bars.
  • the radially directed blocking element can be retracted axially on the circumference of the rotary base into a running intermediate space between the two axial stop strips.
  • a reverse arrangement is possible in which at least one radially directed blocking element on the inner circumference of the drill pipe extends radially inwardly, while one or more stop bars are provided on the outer periphery of the rotary bottom.
  • Locking element and / or locking stop can each be releasably supported on the rotary bottom or on the drill pipe.
  • the invention is preferably further developed according to a further embodiment, that along the inner circumference of the drill pipe at least one inclined guide rail is arranged, which cooperates with the axial displacement of the first stroke position in the second stroke position with at least one cam element on the rotary bottom, the rotary bottom in the shutter position is rotatable.
  • a cam-cam follower mechanism provided by which the axial lifting movement is converted into an at least partial rotational movement of the rotary bottom.
  • the radially directed blocking element is at the same time the cam element.
  • it may also be provided a separate cam element, which is provided with a friction-reducing device, such as a roller.
  • the guide bar can pass into the catch stop and thus form part of the locking device.
  • a kinematic reversal is possible, wherein the cam element is then provided on the radially inner side of the drill pipe and a guide strip on the drill spiral.
  • a further preferred embodiment of the invention consists in that the core tube of the auger has at least one outlet opening for a hardenable filling material in a lower region.
  • the filler in particular concrete or other hardenable mass or other pourable filling material, such as sand, gravel, gypsum, etc. can be introduced when pulling the drill pipe in the liberated borehole.
  • the filler in particular concrete or other hardenable mass or other pourable filling material, such as sand, gravel, gypsum, etc. can be introduced when pulling the drill pipe in the liberated borehole.
  • the support of the borehole wall can be taken directly by the contents.
  • the contents can harden immediately or after addition of another additive to the bored pile.
  • the outlet opening for the filling material has a closure. It is preferred according to a development of the invention that in the first stroke position, the outlet opening for the filling material is closed and that in the second Stroke position, the outlet opening for the filling material is open.
  • the opening and closing of the outlet opening for the filling material can be effected by a separate closure device, which is controlled from the outside.
  • the closure device for the outlet opening is preferably in direct communication with the rotary bottom, wherein during the adjustment of the rotary bottom from the drilling position into the closed position, the outlet opening is simultaneously moved from the closed position to the open position. This can be achieved by a corresponding slider on the outside or inside of the tube soul, wherein the slider is fixedly connected to the rotary bottom or is in mechanical operative connection with the rotary bottom.
  • a particularly compact arrangement is achieved according to an embodiment of the invention in that the rotary bottom is rotatably mounted on a lower end of the core tube and that are arranged on a bottom of the rotary bottom Bodenabtragswerkmaschinemaschinee.
  • the soil erosion tools can be chisels or erosion teeth.
  • a pilot with centering tip or other Abtragsm adoptedeln can be arranged in the region of the axis of rotation of the rotary base.
  • the outlet opening for the filling material is located below the rotary base, so that the filling material can emerge from the tube when the rotary floor is closed.
  • the invention further relates to a drilling apparatus for producing a bored pile in a ground with a carrier device and a mast arranged on the carrier device, wherein according to the invention the drilling device described above is provided.
  • a drilling device can be used which, except for the drilling device according to the invention, is designed like a conventional drilling device for double-head drilling.
  • a preferred embodiment of the drill according to the invention is that a lifting device is provided, with which the auger is axially adjustable relative to the drill pipe.
  • the lifting device may preferably have at least one actuating cylinder, in particular a hydraulic cylinder, through which an axial stroke movement between auger and drill pipe is executable.
  • the lifting device has two or more actuating cylinders.
  • the lifting device can be controlled by the operator of the drill, preferably a simple adjusting knob is provided.
  • a first rotary drive for the auger and a second rotary drive for the drill pipe are arranged axially adjustable on the mast.
  • the rotary actuators are preferably hydraulic drives, which are preferably movable along the mast by means of adjusting cylinders or cable pull mechanisms.
  • the axial travel drives for the two rotary drives can also be used to adjust the stroke to move drill pipe and auger axially to each other.
  • the lifting device is arranged between the first rotary drive and the second rotary drive.
  • the one or more actuating cylinders are arranged between the two rotary drives, so that the rotary actuators can be moved in a simple manner between the first stroke position and the second stroke position relative to each other.
  • the first rotary drive is axially fixed to the auger and the second rotary drive axially fixed to the drill pipe.
  • the invention is characterized in that for adjusting the rotary bottom, the auger and the drill pipe are axially displaced from each other between a first stroke position and a second stroke position, that in the first stroke position, the rotary bottom is in the drilling position with open passage and that in the second stroke position of the rotary bottom is adjusted in its closed position.
  • the drilling device described above or the drilling device described above can be used.
  • the advantages described above can be achieved with the method according to the invention.
  • the rotary bottom can be rotated before, after or during the axial adjustment into a closed position, in particular with one of the rotary drives.
  • a preferred variant of the method according to the invention consists in that during the axial adjustment of the auger relative to the drill pipe the rotary floor is rotated between the drilling position and the closing position.
  • a so-called cam cam follower mechanism can be used by which the axial adjustment is at least partially converted into a desired rotational movement.
  • the rotary bottom is adjusted from the drilling position into the closed position or optionally vice versa.
  • the rotary bottom in the drilling position closes an outlet opening for a hardenable filling material in a lower region of the at least one drill spiral, that the rotary floor releases the outlet opening in the closed position and that filling material for forming the outlet opening is provided Bored pile is introduced into the borehole.
  • the adjustment of the rotary bottom can also control the opening or closing of the outlet opening for the filling material.
  • FIG Fig. 1 A drill 10 with a drilling device 20 according to the invention is shown in FIG Fig. 1 shown.
  • the drill 10 has a carrier device 12 with a crawler track and a rotatable superstructure, on which a vertical mast 14 is arranged.
  • a first rotary drive 15 and a second rotary drive 16 are mounted vertically displaceable and movable by means of a cable mechanism 19 in a known manner.
  • the first rotary drive 15 is fixedly connected to a drilling auger 22 of the drilling device 20 to drive the auger 22 rotationally.
  • an outer drill pipe 30 of the drilling device 20 is rotatably connected to the second rotary drive 16. Drilling screw 22 and drill pipe 30 can be independently driven in terms of speed and direction and torque.
  • the rotary actuators 15, 16 are each independently supported axially displaceable on slides, wherein between the two rotary actuators 15, 16 a lifting device 18 is shown only schematically.
  • the lifting device 18, which has at least one hydraulic cylinder the first rotary drive 15 can be adjusted relative to the second rotary drive 16 axially by a defined stroke.
  • the auger 22 of the drilling device 20 has a central hollow core tube 24 along the circumference of a conveyor coil 24 is arranged for conveying processed soil material.
  • FIG Fig. 2 A lower end of a drilling device 20 according to the invention is shown in FIG Fig. 2 shown.
  • a lower annular cutter 32 is releasably arranged with a plurality of downwardly directed Abtragszähnen 34.
  • the auger 22 is rotatably arranged with the central core tube 26 and the only partially recognizable drill spiral 24.
  • a rotary bottom 40 which consists essentially of a rotatably mounted plate 42 with two lateral, opposite V-shaped recesses 46.
  • the two recesses 46 in the plate 42 form an open passage 29, through which soil material worked off by the soil removal tools 48 passes into the interior of the drill pipe 30 and over the at least one Drill spiral 24 can be conveyed upward.
  • On the outer periphery of the plate 42 more chisel 49 are arranged for removing the soil.
  • a radially directed locking element 50 releasably mounted in a radial outer region of the rotary bottom 40 via a respective U-shaped holder 52.
  • a pilot tip 44 is provided in a central region of the rotary bottom 40, which is also provided with a plurality of Abtragsm faced.
  • FIGS. 3 and 4 The structure of the lower portion of the drilling device 20 with the rotary bottom 40 is further in the FIGS. 3 and 4 clarified.
  • the plate 42 of the rotary bottom 40 Via a central pivot bearing 43, the plate 42 of the rotary bottom 40 is rotatably mounted about a center axis of the drilling device 20.
  • the radially directed outer locking elements 50 reach the rotary bottom 40 in the circumferential direction in engagement with the radially inwardly projecting locking stops 60, which are screwed from an outer side of the drill pipe 30 projecting radially inwardly.
  • second stroke position of the rotary bottom 40 is rotated by about 90 ° to a fixed end plate 28 at the lower end of the auger 22, so that the passages are closed in the interior of the drill pipe 30.
  • the drilling apparatus 20 may be axially withdrawn from the wellbore without the risk of drilled soil material falling from the wellbore 24 back into the wellbore.
  • an outlet opening, not shown, for a filling material is opened at the same time, wherein via a line 27 in the interior of the core tube 26 filler, such as concrete, can be introduced when retracting the drilling device 20 in the well.
  • Fig. 5 is clearly shown how the radially outwardly directed blocking element 50 comes to stop on the outer circumference of the rotary bottom 40 for blocking a rotational movement with the projecting radially from the inner wall of the drill pipe 30 locking stopper 60 comes.

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  • 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)
EP16150572.2A 2016-01-08 2016-01-08 Dispositif de forage et procede de fabrication d'un pieu fore dans le sol Active EP3190257B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP16150572.2A EP3190257B1 (fr) 2016-01-08 2016-01-08 Dispositif de forage et procede de fabrication d'un pieu fore dans le sol

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP16150572.2A EP3190257B1 (fr) 2016-01-08 2016-01-08 Dispositif de forage et procede de fabrication d'un pieu fore dans le sol

Publications (2)

Publication Number Publication Date
EP3190257A1 true EP3190257A1 (fr) 2017-07-12
EP3190257B1 EP3190257B1 (fr) 2018-04-25

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2832438A1 (fr) 2001-11-20 2003-05-23 Durmeyer Entrp Travaux Publics Tariere pour la realisation de trous fores et/ou betonnes et procedes mettant en oeuvre ladite tariere
DE10359103A1 (de) 2003-12-17 2005-07-21 Bauer Spezialtiefbau Gmbh Drehboden für Doppelkopfbohren
EP1895090A1 (fr) * 2006-08-23 2008-03-05 Bauer Spezialtiefbau GmbH Procédé et dispositif de réalisation d'un trou de forage dans le sol
EP2740882A1 (fr) * 2012-12-04 2014-06-11 Bauer Spezialtiefbau GmbH Dispositif de forage et procédé de création d'un trou de forage

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB191421078A (en) * 1914-10-16 1915-04-01 Benjamin Hosking Trewhella An Improvement in Ground-augers.
DE502004000661D1 (de) * 2004-03-26 2006-07-06 Bauer Maschinen Gmbh Bohrschnecke und Verfahren zum Erstellen einer Gründungssäule im Boden

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2832438A1 (fr) 2001-11-20 2003-05-23 Durmeyer Entrp Travaux Publics Tariere pour la realisation de trous fores et/ou betonnes et procedes mettant en oeuvre ladite tariere
DE10359103A1 (de) 2003-12-17 2005-07-21 Bauer Spezialtiefbau Gmbh Drehboden für Doppelkopfbohren
EP1895090A1 (fr) * 2006-08-23 2008-03-05 Bauer Spezialtiefbau GmbH Procédé et dispositif de réalisation d'un trou de forage dans le sol
EP2740882A1 (fr) * 2012-12-04 2014-06-11 Bauer Spezialtiefbau GmbH Dispositif de forage et procédé de création d'un trou de forage

Also Published As

Publication number Publication date
EP3190257B1 (fr) 2018-04-25

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