EP0010037A1 - Hohlbohrer zum Bohren bei der Herstellung von Betonpfählen - Google Patents

Hohlbohrer zum Bohren bei der Herstellung von Betonpfählen Download PDF

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Publication number
EP0010037A1
EP0010037A1 EP79400690A EP79400690A EP0010037A1 EP 0010037 A1 EP0010037 A1 EP 0010037A1 EP 79400690 A EP79400690 A EP 79400690A EP 79400690 A EP79400690 A EP 79400690A EP 0010037 A1 EP0010037 A1 EP 0010037A1
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EP
European Patent Office
Prior art keywords
auger
cylindrical body
fingers
point
concrete
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
EP79400690A
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English (en)
French (fr)
Other versions
EP0010037B1 (de
Inventor
Jean-Marie Labrue
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
Application filed by Individual filed Critical Individual
Publication of EP0010037A1 publication Critical patent/EP0010037A1/de
Application granted granted Critical
Publication of EP0010037B1 publication Critical patent/EP0010037B1/de
Expired legal-status Critical Current

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

Definitions

  • the present invention relates to methods of injecting concrete for in situ molding of piles in holes drilled with a continuous auger.
  • a technique is already known for drilling holes by means of a hollow auger by which concrete is injected after the end of drilling, at the same time as the auger is removed.
  • the hollow auger formed by a cylindrical body around which is fixed a helical drilling blade is screwed into the ground and which is terminated by a removable attack point closing the open lower end of the cylindrical body.
  • fresh pressurized concrete is sent from top to bottom which drives out this point and the auger is raised as the concrete arrives to fill the drilled hole with concrete and make the desired pile.
  • the removable attack point therefore remains at the bottom of the hole, below the stake, in this method. It is not recoverable.
  • a lost point must therefore be placed on the auger when making each pile, and this point cannot. for cost reasons, be equipped with very good quality attack tools.
  • the present invention proposes, to remedy this drawback, a new hollow auger for drilling and injection, further comprising a body. hollow cylindrical provided at its periphery with a helical drilling blade, and a leading point at the lower end of the cylindrical body for sealing it during drilling.
  • the auger further comprises, according to the invention, means for pushing back the point in order to release an opening at the end of the cylindrical body for the injection of concrete, while maintaining the point secured to the cylindrical body when it is in this pushed-back position to allow it to be raised when the auger is raised.
  • These means are preferably constituted by a double-acting hydraulic cylinder, which receives pressurized oil to pull the tip up against the end of the cylindrical body or push it down.
  • This arrangement according to the invention makes it possible not to lose a point of attack in each borehole.
  • it has a great advantage during the concrete injection phase at the end of drilling because it allows easy control, permanently, of the concrete injection pressure.
  • the concrete exerts a pressure on the point forming a shutter valve and this pressure is transmitted directly to the hydraulic supply circuit of the jack so that we can measure the differential pressure between the thrust of the concrete on the inner face of the shutter when it comes out of the auger and the reaction on the external force of the injected concrete.
  • the body of the auger consists of a core composed of two concentric tubes, respectively an inner tube and an outer tubular envelope, separated and kept apart from one another by spacers placed in the interval between the two.
  • the spacers can be separated from the tubes or be integral with one or the other of the tubes.
  • Hydraulic conduits can be passed between the inner tube and the outer casing without damaging the concrete.
  • the resulting increase in diameter of the auger allows an increase in the drilling torque; in addition, the buckling rigidity of the auger is increased thanks to the presence of the two concentric tubes and spacers which hold them, especially if these extend over the entire length of the auger.
  • the auger is preferably made up of several elements put to end and fixed to each other by a bayonet system, each element being terminated by an end piece having axial fingers which fit into a corresponding end piece of an opposite element, and which is axially locked by relative rotation with respect to this other end piece thanks to a set of notches (pins and mortises) provided laterally on the fingers of each nozzle.
  • Ribs provided on the inner tube then serve to key the ends thus hooked to each other to prevent any relative rotation of the two auger elements after they have been placed end to end, nested and turned.
  • the auger of the invention comprises a hollow cylindrical body 1 at the outer periphery of which is welded a helical drilling blade 2 descending to the lower end of the body.
  • This lower end is open downwards but can be closed off by a valve 3 constituting at the same time an attack point for drilling. This point is provided with good quality cutting edges for drilling in the best conditions.
  • the valve tip 3 is mobile and can either come in the closed position (Figure 1) from the end of the cylindrical body, or be pushed down (Figure 2) in the concrete injection position.
  • the point In the closed position, the point is engaged by a lug 4 in a mortise 5 formed in the cylindrical body 2, or by other means capable of securing in rotation the point and the cylindrical body while retaining a obturation of the last.
  • the means for pushing downwardly the tip 3 are constituted by a piston-cylinder unit actuated by a hydrauli q uement oil circuit extending over the entire length of the auger inside thereof, so to be able to be connected to a hydraulic control on the ground surface.
  • This hydraulic circuit comprises a line 6 for supplying pressurized oil in a direction tending to raise the tip in the closed position and a line 7 for supplying pressurized oil for the descent of the point .
  • the double-acting piston-cylinder assembly is housed in an enlarged cylindrical part 8 at the base of the cylindrical body, so as not to reduce the passage section of the concrete inside the auger.
  • This assembly comprises a fixed cylinder 9 screwed onto the wall of the hollow cylindrical body e ⁇ delimiting between its external cylindrical surface and the internal wall of the enlarged part 8 of the cylindrical body an annular chamber 11 capable of being filled with oil under pressure by the pipe 6 which opens into this chamber 11.
  • the latter is closed at its lower part by an annular flange 12 extending transversely to the outer wall of the cylinder 9.
  • a piston 10 is capable of moving in this annular chamber 11 by dividing it into an upper half chamber into which the pipe 7 opens and a lower half chamber into which the pipe 6 opens.
  • the piston is for this purpose formed of a wall cylindrical terminated by a transverse annular rim 13 which separates the chamber 11 into two half chambers and on which the fluid pressure is exerted, on one side or the other to move the piston coaxially with the cylinder 9.
  • the tip 3 closes the open end of the cylindrical body of the auger, and the pin 4 is engaged in the mortise 5.
  • the piston pushes the tip 3 down, leaving free passage to let out the injected concrete.
  • the piston is made integral with the tip for example by a rib 14 around which the passage is free for concrete when the point is pushed down.
  • FIG. 3 represents a general drilling installation using the auger according to the invention.
  • a drilling mast 15 is seen with a hydraulic rotation table 16 for driving the auger 17 in rotation, a rotation table which slides along the mast 15 and descends as the drilling advances and then rises during casting. concrete.
  • a pipe 18 for supplying fresh concrete is connected.
  • manometers 21 and 22 are placed manometers 21 and 22 respectively, for controlling the differential injection pressure of concrete.
  • Oil is supplied to the lines by a pump 23 and a distributor 21, oil tanks graduated 25 and 26 with sliders being interposed between the distributor and the pipes 19 and -20 to allow control of the lowering of the tip 3 during the injection of concrete; this more or less large lowering corresponds in fact to a more or less large section of passage of the concrete in the borehole and therefore defines the flow rate of the concrete.
  • the invention therefore makes it possible to effectively control the flow and quality of concrete molding, avoiding the disadvantage of the prior art in which the concrete pressure could only be controlled at the top of the auger.
  • FIG. 5 is a cross section corresponding to FIG. 4.
  • conduits 39 serving to bring the hydraulic pressure to the means for moving the auger attack point (point not shown ), means which are located at the bottom of the auger.
  • conduits 39 are sheltered from mechanical stresses liable to be caused by the presence of concrete inside the tube 34.
  • the spacers 33 extend over the entire length of the auger elements, one of these crosssen- t e an excellent buckling strength compared with a simple hollow cylindrical auger.
  • the torque applied to the auger may be greater given the increase in diameter for the same concrete passage section.
  • Figures 6 and 7 is shown the junction between two auger elements according to the invention, elements which are fitted and locked by a bayonet system.
  • the external body 31 ′ of one of the elements of the auger and the external body 31 ′′ of the other element of the auger are placed end to end and fitted into each other, the body 31 'ending with fingers projecting in the axial direction, arranged circumferentially with a diameter less than or equal to the internal diameter of the body 31 "in order to be able to penetrate therein; these fingers 310 'on the figures 6 and 7, extend inside the body 31' where they form ribs along the walls of the body 31 '; the fingers 310 ′ and the ribs 311 1 which extend them extend circumferentially over only part of the internal periphery of the body, spaces being reserved between these ribs to allow passage to the corresponding fingers 310 ′′, made exactly the same way, from the body 31 "; the fingers 310 "of the body 31” can therefore extend in the axial direction between the ribs 11 'extending the fingers 310', while the fingers 310 'can extend in the body 31 "between the ribs 11" extending
  • each finger 310 ′ or 310 ′′ has a notched lateral side, opposite a lateral side notched in a manner complementary to a rib 311 ′′ or 311 ′ respectively in such a way that a rotation of the element 31 'relative to the element 31 ", causes a lateral interlocking of the fingers 310" of an element in the ribs 311 "of the other element and consequently a locking in the axial direction since the lateral interlocking fingers 310 'with ribs 311 "extending fingers 310" is by mutual engagement of side edges notched in a complementary manner.
  • the inner tube 34 has at its outer periphery several longitudinal ribs 312 distributed so that these ribs can be inserted exactly between the fingers 310 'and the ribs 311 "; so that between the fingers 310 "and the ribs 311" once the elements 31 'and 31 "have been turned into their axial locking position. Consequently, after having carried out the axial locking of the outer bodies 31 'and 31 ", the inner tube 34 is axially inserted with its ribs exactly in place between the fingers and ribs of each of the elements; it is then no longer possible to rotate the bodies 31' and 31 "relatively to each other since the ribs 312 prevent this rotation.
  • These ribs 312 can be constituted by the spacers 33 provided between the inner tube 34 and the outer casing 31 of the auger.
  • each body comprises four fingers 310 'or 310 "with their extensions 311', 311" inside the body, these fingers extending at an angle of 45 ° each so that there is barely room to fit the fingers of one of the bodies between the ribs extending the fingers of the other body, the lateral notches of the fingers and their extensions have a depth corresponding to half the circumferential extent of each finger, so that once the fingers of one of the bodies are nested in the extensions of the fingers of the other body after relative rotation of the two bodies, there remains for the ribs 312 a space corresponding to half of 45 ° and we will therefore choose ribs having this circumferential dimension and having as radial dimension the distance between the inner tube and the outer tube.
  • the fingers projecting axially and their extensions inside the body have a radial dimension which corresponds to the interval between the inner tube and the outer auger tube.
  • the nozzles thus formed for connecting two auger elements form an obstacle to the passage of the hydraulic conduits 39 provided in the interval between the two concentric tubes of the auger.

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Geology (AREA)
  • Structural Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • Physics & Mathematics (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Mechanical Engineering (AREA)
  • Paleontology (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Earth Drilling (AREA)
  • Piles And Underground Anchors (AREA)
EP19790400690 1978-09-27 1979-09-27 Hohlbohrer zum Bohren bei der Herstellung von Betonpfählen Expired EP0010037B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR7827632 1978-09-27
FR7827632A FR2437468A1 (fr) 1978-09-27 1978-09-27 Tariere creuse pour le forage en vue du moulage de pieux en beton

Publications (2)

Publication Number Publication Date
EP0010037A1 true EP0010037A1 (de) 1980-04-16
EP0010037B1 EP0010037B1 (de) 1982-12-01

Family

ID=9213084

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19790400690 Expired EP0010037B1 (de) 1978-09-27 1979-09-27 Hohlbohrer zum Bohren bei der Herstellung von Betonpfählen

Country Status (3)

Country Link
EP (1) EP0010037B1 (de)
DE (1) DE2964153D1 (de)
FR (1) FR2437468A1 (de)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU585755B2 (en) * 1987-07-10 1989-06-22 Frankipile Australia Pty. Limited Method and apparatus for boring piles
EP0831180A1 (de) * 1996-09-20 1998-03-25 Gaspar Jozef Coelus Stangenbohrer zur Herstellung eines Pfahls im Boden und Verfahren zum Anbringen dieses Pfahls
CN103899252A (zh) * 2014-04-23 2014-07-02 山西八建集团有限公司 水下喷浆固壁钻头
CN104452768A (zh) * 2014-12-05 2015-03-25 张璐 矩形灌注桩成孔机
CN106192996A (zh) * 2016-08-26 2016-12-07 武汉谦诚桩工科技股份有限公司 一种t形桩的施工方法及t形浇注桩施工用的t形钻具
WO2021082769A1 (zh) * 2019-10-29 2021-05-06 国家电网有限公司 一种盐碱地区输电塔 uhpc-nc 组合桩基础及施工方法

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2516958B1 (fr) * 1981-09-22 1985-08-16 Dn Inzh Str Inst Dispositif pour confection par moulage de pieux creux et procede de confection de tels pieux en utilisant ce dispositif
BE903965A (nl) * 1985-12-31 1986-04-16 Coelus Gaspar Jozef Apparaat en methode om boorpalen uit te voeren.
CN102392598B (zh) * 2011-09-24 2013-08-14 邵金安 液压振动冲击器及其构成的桩工动力头

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1322130A (fr) * 1961-02-28 1963-03-29 Méthode et appareil pour former un pieu en béton dans le sol par forage
US3300988A (en) * 1960-12-23 1967-01-31 Raymond Int Inc Apparatus for forming piles
FR1595399A (de) * 1967-01-08 1970-06-08

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3300988A (en) * 1960-12-23 1967-01-31 Raymond Int Inc Apparatus for forming piles
FR1322130A (fr) * 1961-02-28 1963-03-29 Méthode et appareil pour former un pieu en béton dans le sol par forage
FR1595399A (de) * 1967-01-08 1970-06-08

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU585755B2 (en) * 1987-07-10 1989-06-22 Frankipile Australia Pty. Limited Method and apparatus for boring piles
EP0831180A1 (de) * 1996-09-20 1998-03-25 Gaspar Jozef Coelus Stangenbohrer zur Herstellung eines Pfahls im Boden und Verfahren zum Anbringen dieses Pfahls
BE1010638A3 (nl) * 1996-09-20 1998-11-03 Poorteman Frank Boor voor het maken van een paal in de grond en werkwijze die deze boor toepast.
US5875860A (en) * 1996-09-20 1999-03-02 Gaspar Coelus Drill for making a pole in the ground and a method for applying such a drill
CN103899252A (zh) * 2014-04-23 2014-07-02 山西八建集团有限公司 水下喷浆固壁钻头
CN103899252B (zh) * 2014-04-23 2016-06-15 山西八建集团有限公司 水下喷浆固壁钻头
CN104452768A (zh) * 2014-12-05 2015-03-25 张璐 矩形灌注桩成孔机
CN106192996A (zh) * 2016-08-26 2016-12-07 武汉谦诚桩工科技股份有限公司 一种t形桩的施工方法及t形浇注桩施工用的t形钻具
WO2021082769A1 (zh) * 2019-10-29 2021-05-06 国家电网有限公司 一种盐碱地区输电塔 uhpc-nc 组合桩基础及施工方法

Also Published As

Publication number Publication date
DE2964153D1 (en) 1983-01-05
EP0010037B1 (de) 1982-12-01
FR2437468A1 (fr) 1980-04-25
FR2437468B1 (de) 1982-11-19

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