EP1277887B1 - Foret de déplacement et appareil utilisant ce foret - Google Patents

Foret de déplacement et appareil utilisant ce foret Download PDF

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Publication number
EP1277887B1
EP1277887B1 EP02291716A EP02291716A EP1277887B1 EP 1277887 B1 EP1277887 B1 EP 1277887B1 EP 02291716 A EP02291716 A EP 02291716A EP 02291716 A EP02291716 A EP 02291716A EP 1277887 B1 EP1277887 B1 EP 1277887B1
Authority
EP
European Patent Office
Prior art keywords
drilling tool
stem
flight
tool
helical
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 - Lifetime
Application number
EP02291716A
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German (de)
English (en)
Other versions
EP1277887A2 (fr
EP1277887A3 (fr
Inventor
Lewis Compagnie du Sol Stansfield
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.)
Compagnie du Sol SARL
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Compagnie du Sol SARL
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Publication date
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Application filed by Compagnie du Sol SARL filed Critical Compagnie du Sol SARL
Publication of EP1277887A2 publication Critical patent/EP1277887A2/fr
Publication of EP1277887A3 publication Critical patent/EP1277887A3/fr
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Publication of EP1277887B1 publication Critical patent/EP1277887B1/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
    • 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
    • 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
    • E21B7/26—Drilling without earth removal, e.g. with self-propelled burrowing devices
    • E21B7/267—Drilling devices with senders, e.g. radio-transmitters for position of drilling tool
    • 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 a displacement drilling tool and to an equipment for making piles in the soil, said installation using said displacement drilling tool.
  • the first category is called "Driven piles”.
  • a precast concrete pile is driven into the soil by a percussive hammer. This process has the advantage of improving compaction of the soil, therefore design rules can allow very favourable coefficients of safety.
  • this type of pile is no longer accepted on many sites, since it creates very high noise levels and high levels of vibration in the soil that could cause damage to neighbouring structures.
  • the drilling equipment is designed to displace the soil horizontally and compact it around the sides of the hole during the drilling process. A minimum of soil waste is brought to the ground surface, and the increased density of the surrounding soil improves the bearing capacity of the pile.
  • the present invention relates to the third category.
  • a helical groove can be provided in the wall of the bore.
  • the concrete When concrete is injected in the bore, the concrete also fills the helical groove to form a concrete thread which ensures the anchorage of the pile. Another advantage of the helical thread is to allow a significant reduction of the required amount of concrete.
  • Drilling tools based on the rotary displacement technique are well known per se.
  • US 6,033,152 and EP 0 693 158 describe two types of drilling tool performing a horizontal displacement of the soil during the drilling operation.
  • Another disclosure of such a tool is WO 94/02687 A , as described in the preamble of claim 1.
  • a first object of the present invention is to provide a displacement drilling tool which overcomes the drawbacks of the known drilling tools.
  • the drilling tool comprises a stem having a tip, an upper end and a longitudinal axis, to be connected to at least one rotating follower tube, and a helical flight surrounding said stem, said drilling tool being characterised in that the external diameter of said stem decreases from the upper end to said tip, said helical flight has a substantially constant external diameter and in that it further comprises cutter means fixed to said helical flight close to said tip, said cutter means projecting outside said helical flight and extending along a direction substantially perpendicular to said longitudinal axis.
  • tapered stem performs the horizontal displacement of the soil and the compaction of the wall of the bore during the downward displacement of the tool.
  • the cutter means which projects outside the flight, produces the helical grove in the compacted wall of the bore.
  • Another object of the present invention is to provide an equipment for making piles in the soil.
  • the equipment comprises:
  • the rotation speed and the upward displacement speed of the tool can be controlled independently.
  • the pitch of the helical grove produced by the cutter means can be predetermined. Moreover this pitch can be varied with depth.
  • the tool 10 consists of an auger head having particular geometrical features.
  • the tool 10 comprises a hollow stem 12 provided with an axial passage 14 for delivering concrete, a tip 16 and an upper connecting end 18.
  • the stem 12 is tapered and the external diameter D1 of the stem close to the tip 16 is inferior to the external diameter D2 of the stem at its upper end 18.
  • the total length of the tool is equal to L1.
  • the tool 10 further comprises a helical flight 20 which extends along the whole length of the stem 12.
  • the external diameter D3 of the flight is constant.
  • D3 330 mm.
  • the pitch of the helical flight is substantially constant and the external diameter D3 of the flight is substantially equal to the greater external diameter D2 of the stem.
  • the flight 20 is provided with a cutting blade 24, visible in Figures 1B, 1C , 2 and 3 .
  • the cutting blade 24 is held at a fixed angle ⁇ in a blade holder 26 near the base of the auger close to the tip 16 of the tool.
  • the cutting blade 24 projects outside the flight 20 and extends in a direction substantially perpendicular to the axis XX' of the stem 12.
  • the length L2 of the blade is equal to 60 to 85 mm, its thickness e is equal to 25 mm, and an angle ⁇ is equal to 15 degrees.
  • the flight 20 is provided with a blade 28, which is held at a steep angle in a blade holder 21.
  • a flange 22' forms a vertical skirt to reinforce the blade holder 21 and assists in maintaining correct alignment of the drilling tool when it first enters the soil.
  • the tool 10 further comprises a follower tube 32 in one or more pieces connected to each other and to the upper end 18 of the stem of the auger.
  • the follower tube 32 has the same diameter D2 as the greater diameter of the tapered stem of the tool 12. It may be plain, or may have small flights of similar external diameter to those of the auger head, as shown in Figure 1A .
  • the follower tube is 12 metres or 18 metres long, comprising 2 or 3 pieces, each piece being 6 metres long.
  • the follower tube 32 performs two functions. It allows the extension of the length of the drilling tool to enable it to bore to the required depth, and it transmits the rotary action of the drilling head of the equipment or rig.
  • the follower tube 32 has no flight.
  • the cutting blade 24 is designed to provide little resistance to penetration of the tool cutting only a thin slot 40 in the wall 42 of the bore 44.
  • the section of the slot has the same size as the section of the blade. For example, 25 mm x 60 to 85 mm. This slot is closed when the soil is displaced by the tapered stem 12 of the tool.
  • the tool 10 is still rotated in a clockwise direction and the required lifting force is applied to the tool.
  • the cutting blade 24 cuts a trapezoidal helical slot 46 in the wall 42 of the bore 44.
  • the trapezoidal slot 46 and the bore 44 are filled with concrete, pumped through the axial passage 14 and delivered by the opened lower end of the stem of the tool, as the drilling tool is being extracted from the ground.
  • the cutting blade 24 is disposed at an angle equal to 180 degrees with respect to the terminal blade 28. Preferably, this angle is reduced to about 90 degrees, whereby the cutting blade 24 is still closer to the tip 16 of the tool. In this preferred embodiment, the cutting blade 24 is closer to the opened end of the stem of the tool through which the concrete is delivered. As a result, the filling of the slot made by the cutting blade 24 is still improved.
  • the equipment shown in Figure 6 comprises a piling rig 50 provided with a vertical mast 52.
  • a trolley 54 is moved along the mast 52 by means of a cable 56 driven by a first motor 58.
  • the trolley 54 supports a rotary drive box 60.
  • the rotary drive box is equipped with a second motor 62 to rotate the follower tube 32.
  • the drilling tool 10 shown in Figures 1A to 3 is fixed to the lower end of the follower tube 32.
  • the equipment further comprises a concrete pump 64.
  • the pump is connected to the upper end of the follower tube by means of a concrete delivery pipe 66 and a rotary sealing joint 68.
  • first speed transducer 72 to measure the vertical displacement speed of the tool 10
  • second speed transducer 74 to measure the rotation speed of the tool 10.
  • a control unit 76 receives the signals delivered by the transducers 72 and 74 and emits speed control signals towards the motors 58 and 62.
  • the concrete delivery pipe 66 for delivering the concrete is equipped with transducers 78 and 80 to measure the flow rate of concrete and the concrete pressure.
  • the uplift speed of the tool 10 and the rotation speed of the tool can be controlled independently by the control unit 76. Consequently, it is possible to obtain a helical slot in the wall of the bore which has a variable pitch, and a pile having a helical thread with a variable or adjustable pitch.
  • FIG 5 shows a portion of a pile obtained by using the equipment as shown in Figure 6 .
  • This figure shows the concrete pile itself 86, the diameter of which is defined by the external diameter of the flight and the helical thread 88 corresponding to the rotation of the cutting blade 24 during the upward displacement of the tool (see Figure 4 ).
  • the preferred way of operating of the drilling equipment is as follows:
  • the displacement drilling tool and the drilling equipment according to the invention has many advantages as compared with the known devices.
  • the torque required to screw the drilling tool into the ground is less than required by the known similar tools.

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Geology (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Fluid Mechanics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Structural Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Paleontology (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Earth Drilling (AREA)
  • Drilling Tools (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
  • Piles And Underground Anchors (AREA)

Claims (8)

  1. Outil de fortage (32) pour réaliser des pileux dans le sol, comprenant une tige ayant un embout, une extrémité supérieure et un axe longitudinal (x), qu'il s'agit de connecter à au moins un tube suiveur en rotation, et un filet hélicoïdal entourant ladite tigre (18), ledit filet étant pourvu de moyens de coupe (28), ledit outil de forage étant caractérise en ce que le diamètre extérieur de ladite lige diminue depuis l'extrémité supérieure jusqu'audit embout, pour compacter la paroi du trou formé par ledit outil, ledit filet hélicoïdal ayant un diamètre extérieur sensiblement constant, et en ce que lesdits moyens de coupe (28) sont fixées maudit filet hélicoïdal (20) à proximité dudit embout, lesdits moyens de coupe se projetant vers l'extérieur dudit filet hélicoïdal et s'étendant le long d'une direction fixe sensiblement perpendiculaire audit axe longitudinal pour produire une rainure hélicoïdale à l'intérieur de ladite paroi compactée.
  2. Outil de forage selon la revendication 1, caractérisé en ce que ladite tigre (18) contient un passage axial (14) pour la fourniture de béton, et en ce qu'il comprend en outre un capuchon mobile adapté à fermer l'extrémité inférieure duit passage axial.
  3. Outil de forage salon la revendication 1 ou 2, caractérisé en ce que ledit filet hélicoïdal (20) a un pas qui est sensiblement constant.
  4. Outil de forage salon l'une quelconque des revendications précédentes, caractérisé en ce que le diamètre externe du filet (20) est sensiblement égal au plus grand diamètre de la tige effilée.
  5. Outil de forage selon l'une quelconque des revendications 1 à 4, caractérisé en ce qu'il comprend en outre au moins un tube suiveur dépourvu de filet (20), ledit tube suiveur ayant sensiblement le même diamètre que l'extrémité supérieure de la tige.
  6. Outil de fortage selon l'une quelconque des revendication 1 à 5, caractérisé en ce que lesdits moyens de coupe (28) sont disposés sous un angle qui ne dépasse pas 1800 par rapport à l'extrémité inférieur du filet.
  7. Équipement pour réaliser des pieux dans le sol, caractérisé en ce qu'il comprend :
    - un outil de forage selon l'une quelconque des revendications 1 à 5 ;
    - des premiers moyens moteurs pour faire tourner ledit outil de forage autour de son axe longitudinal ;
    - des seconds moyens moteurs pour déplacer verticalement ledit outil de forage vers le haut et vers le bas ;
    - des moyens de commande pour appliquer des signaux de commande auxdits premiers moyens moteurs et auxdits seconds moyens moteurs de sorte que pendant le déglacement descendant, l'outil de forage est mis en rotation dans le sens des aiguillés d'une montre, et de sorte que pendant le déplacement montant, l'outil de forage (32) est aussi mis en rotation dans le sens des aiguilles d'une montre avec une vitesse de rotation prédéterminée, et ledit outil de forage est déplacé vers le haut avec une vitesse linéaire prédéterminée, grâce à quoi la rainure hélicoïdale réalisée dans la paroi du trou par lesdits moyens de coupe a un pas prédéterminé.
  8. Équipement selon la revendication 6, caractérisé en ce que ledit outil de forage comprend en outre un capuchon mobile adapté à fermer l'extrémité inférieure du passage axial (14) dans la tige de l'outil, et en ce qu'il comprend en outre des moyens pour fournir du béton dudit passage axial.
EP02291716A 2001-07-17 2002-07-09 Foret de déplacement et appareil utilisant ce foret Expired - Lifetime EP1277887B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0117410 2001-07-17
GB0117410A GB2377235A (en) 2001-07-17 2001-07-17 Drilling tool

Publications (3)

Publication Number Publication Date
EP1277887A2 EP1277887A2 (fr) 2003-01-22
EP1277887A3 EP1277887A3 (fr) 2004-09-08
EP1277887B1 true EP1277887B1 (fr) 2008-08-27

Family

ID=9918662

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02291716A Expired - Lifetime EP1277887B1 (fr) 2001-07-17 2002-07-09 Foret de déplacement et appareil utilisant ce foret

Country Status (8)

Country Link
EP (1) EP1277887B1 (fr)
AT (1) ATE406481T1 (fr)
DE (1) DE60228527D1 (fr)
ES (1) ES2312534T3 (fr)
GB (1) GB2377235A (fr)
HK (1) HK1052537A1 (fr)
PL (1) PL211015B1 (fr)
PT (1) PT1277887E (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2246479A1 (fr) 2009-04-21 2010-11-03 Soilmec S.p.A. Dispositif de forage pour fabriquer des pieux

Families Citing this family (17)

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Publication number Priority date Publication date Assignee Title
GB2400869B (en) * 2003-04-22 2006-11-15 Cie Du Sol Threading equipment
WO2004101897A1 (fr) * 2003-05-15 2004-11-25 Pass, Jonathan, Charles Procede de construction de pieux
US20050039952A1 (en) 2003-08-20 2005-02-24 Hill John L. Drilling apparatus, method, and system
NL1027112C2 (nl) * 2004-09-24 2006-03-27 Ecodrie B V Grondboor en werkwijze voor het vervaardigen van een boorgat en een funderingspaal.
NL1027150C2 (nl) * 2004-09-30 2006-04-03 Ecodrie B V Grondboor; werkwijze voor het verdiepen van een schacht in een bodem; en werkwijze voor het voortbrengen van een funderingspaal.
EP1748108B1 (fr) * 2005-07-28 2010-09-08 Soletanche Freyssinet Tarière à ergot mobile pour réaliser un forage
FR2889241B1 (fr) * 2005-07-28 2013-05-17 Cie Du Sol Tariere a ergot mobile
DE502007000585D1 (de) * 2007-01-04 2009-05-20 Bauer Maschinen Gmbh Verfahren und Vorrichtung zum Erstellen einer Bohrung im Boden durch Verdrängerbohren
BE1018097A3 (nl) * 2008-04-16 2010-05-04 Noterman Putboringen Boorvoorziening en werkwijze voor het vervaardigen van een funderingspaal en verbeterde funderingspaal met schroefvorm.
MD4011C2 (ro) * 2009-08-26 2010-08-31 Григоре ЧАПА Procedeu de înălţare a pilonului armat monolit şi dispozitiv de montare auxiliar pentru realizarea lui
EP2295645B1 (fr) * 2009-08-28 2012-05-16 BAUER Maschinen GmbH Machine de forage et procédée de produire des pieux dans un sol
IT1403419B1 (it) 2010-12-23 2013-10-17 Soilmec Spa Metodo ed apparato per la perforazione del terreno.
AU2013408776B2 (en) 2013-12-27 2017-03-30 Halliburton Energy Services, Inc. Threaded connection with high bend and torque capacities
US10589332B2 (en) 2014-04-10 2020-03-17 Sentek Pty Ltd Soil auger and method of manufacture
AT15492U1 (de) * 2016-05-20 2017-10-15 Dywidag-Systems Int Gmbh Verfahren zum Schlag- oder Drehschlagbohren von Löchern sowie gleichzeitigem Profilieren von Bohrlochwänden in Erd-, Boden- oder Gesteinsmaterial
PL3467205T3 (pl) 2017-10-06 2020-06-01 Bauer Maschinen Gmbh Sposób wytwarzania pala w gruncie i urządzenie do obrabiania gruntu dla niego
WO2019123212A1 (fr) * 2017-12-18 2019-06-27 Nordwind S.R.L. Procédé de renforcement de sols et véhicule de mise en œuvre utilisable avec le procédé

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US4061197A (en) * 1975-11-06 1977-12-06 Skidmore Jr Sam C Method and apparatus for drilling in permafrost and the like
JPH01312193A (ja) * 1988-06-13 1989-12-15 Shiomigumi:Kk アースオーガ装置に使用する掘削ヘッド
JPH0711233B2 (ja) * 1991-08-05 1995-02-08 信 高橋 基礎杭の無排土施工装置および基礎杭の無排土施工方法
ZA935287B (en) * 1992-07-24 1994-04-26 Wagstaff Piling Pty Ltd Apparatus and method for forming piles
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JP3015935B2 (ja) * 1996-07-30 2000-03-06 小井 輝夫 基礎地盤の掘孔装置
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2246479A1 (fr) 2009-04-21 2010-11-03 Soilmec S.p.A. Dispositif de forage pour fabriquer des pieux

Also Published As

Publication number Publication date
DE60228527D1 (de) 2008-10-09
EP1277887A2 (fr) 2003-01-22
GB0117410D0 (en) 2001-09-05
HK1052537A1 (en) 2003-09-19
ES2312534T3 (es) 2009-03-01
EP1277887A3 (fr) 2004-09-08
GB2377235A (en) 2003-01-08
PL355067A1 (en) 2003-01-27
ATE406481T1 (de) 2008-09-15
PT1277887E (pt) 2008-12-03
PL211015B1 (pl) 2012-03-30

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