EP0588143A1 - Trépan de forage pour former un pieu de béton dans le sol - Google Patents

Trépan de forage pour former un pieu de béton dans le sol Download PDF

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Publication number
EP0588143A1
EP0588143A1 EP93113869A EP93113869A EP0588143A1 EP 0588143 A1 EP0588143 A1 EP 0588143A1 EP 93113869 A EP93113869 A EP 93113869A EP 93113869 A EP93113869 A EP 93113869A EP 0588143 A1 EP0588143 A1 EP 0588143A1
Authority
EP
European Patent Office
Prior art keywords
drill
sleeve
screw
earth
shaft
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
EP93113869A
Other languages
German (de)
English (en)
Other versions
EP0588143B1 (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.)
Sa spie Fondations
Original Assignee
STRABAG HOCH- und INGENIEURBAU 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 STRABAG HOCH- und INGENIEURBAU AG filed Critical STRABAG HOCH- und INGENIEURBAU AG
Publication of EP0588143A1 publication Critical patent/EP0588143A1/fr
Application granted granted Critical
Publication of EP0588143B1 publication Critical patent/EP0588143B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • E21B7/00—Special methods or apparatus for drilling
    • E21B7/26—Drilling without earth removal, e.g. with self-propelled burrowing devices
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D7/00—Methods or apparatus for placing sheet pile bulkheads, piles, mouldpipes, or other moulds
    • E02D7/22—Placing by screwing down
    • 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
    • E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
    • E21B17/22—Rods or pipes with helical structure

Definitions

  • the invention relates to an earth drill for producing a cast-in-place concrete pile, with a tubular shaft which has a detachable drill tip at its lower end and a displacement body which surrounds the shaft at a distance from the lower end, and at least between the drill tip and displacement body on the outer circumference of the shaft a screw rib is arranged.
  • an earth drill of the type described in more detail at the outset is known (EP-B1-0228138), the screw rib of which runs from the drill tip to the displacement body and the displacement body of which has a screw surface adjoining the screw rib, which initially spirals up to the outside diameter the screw rib expanded and then narrowed again spirally to the circumference of the shaft, but in this upper region has a direction of rotation opposite to the screw rib.
  • This known earth drill has the disadvantage that the continuous screw rib loosens the soil surrounding the drill strongly when the drill is brought down and conveys it upwards when the feed speed of the drill in the axial direction is less than the slope of the screw rib. The raised soil is then pressed radially outwards by the spiral surfaces of the displacer and also downwards by the upper spiral.
  • a strong compaction and such a significant increase in friction occurs in the area of the displacer that the drill seizes itself in the ground and cannot penetrate deeper into the ground when its displacer has reached the upper horizon of the ground layer in which the Stake is to be brought down.
  • the length of the piles to be manufactured can therefore not be greater than the shank length of the drill between its drill tip and the displacer. Effective compaction of the soil is therefore achieved with the known earth drill only in the vicinity of the earth's surface, but not in deeper layers, where the continuous screw rib has loosened the soil, which cannot be removed again before the drill is pulled.
  • the object of the invention is to avoid these disadvantages and to provide an earth auger of the type explained in more detail above, which can be brought down and pulled out in various soils, in particular also in uneven soils and great depths, so that loosening of the soil surrounding the pile largely avoided and immediately eliminated again and again.
  • a sleeve is arranged at the lower end of the drill shaft, the outer diameter of which is at least as large as the outer diameter of the screw rib and its axial length is greater than the axial thickness of the screw rib or the smallest distance between two screw threads of the rib.
  • This embodiment has the advantage that the piling loosened from the drill tip during drilling and pushed aside is pushed from the collar into the laterally adjacent soil and compacted there.
  • the sleeve smoothes the borehole wall and at the same time seals it against the ascending in-situ concrete, which is filled into the borehole from above through the tubular shaft when the drill is pulled while the drill bit remains at the bottom of the borehole.
  • the cuff is expediently a metal ring which is firmly connected to the shaft and has at least one bottom entry opening on its lower end face.
  • This configuration has the advantage that part of the soil loosened from the drill tip can enter the screw threads of the screw rib and can increase and compact the soil loosened there when the drill is brought down. At the same time, this reduces the tip resistance when the drill is brought down.
  • a partial screw surface expediently emerges, which extends from the upper end face of the sleeve and which can connect to the screw threads of the screw rib. The loosened soil is then easily passed into the screw threads of the rib.
  • the outer peripheral surface of the sleeve can be cylindrical. However, it is particularly expedient if the outer circumferential surface of the sleeve widens conically towards its lower end face. This configuration has the advantage that loosened soil located in the area of the screw rib easily reaches the conical circumferential surface of the sleeve when the drill is pulled up and is pressed by it against the borehole wall and compacted therein.
  • the displacement body has an upwardly widening, smooth-walled, conical part, the largest outer diameter of which is at least as large as the outer diameter of the screw rib.
  • the displacer has a smooth-walled, cylindrical part above its conical part, the borehole wall compressed by the conical part is additionally stabilized when the drill is brought down.
  • the releasable drilling tip can be a substantially flat plate, which has a soil loosening strip extending across the plate on its underside.
  • a drill bit is inexpensive to manufacture with simple means and can remain at the bottom of the borehole if the drill is pulled out and the borehole is simultaneously filled with concrete.
  • the drill bit plate is expediently connected to the tubular shaft of the drill by a bayonet or claw lock. It then sits firmly when the drill is brought down and securely closes the lower tube opening. On the other hand, it can detach itself from its claws by turning the drill shaft back a little, if in-situ concrete is to be poured into the borehole from above and the earth drill is to be pulled out upwards.
  • 10 denotes the lower end of an earth auger which is used to produce an in-situ concrete displacement pile.
  • the earth drill 10 consists of a cylindrical, tubular shaft 11, which carries at its lower end a drill bit 12 which closes the cylindrical interior 13 of the drill 10 and is releasably fastened to the lower end of the shaft 11 with a claw closure (not shown).
  • the drill bit 12 consists of an in the western flat plate 14, which at its Underside carries a soil loosening strip 15 extending across the plate 14, which is a straight strip in the exemplary embodiment shown in FIG. 5 and is shaped according to an S in the exemplary embodiment shown in FIG. 6.
  • the shaft 11 of the earth auger 10 carries on its outer circumference a screw rib 16 which, in the exemplary embodiments shown, has only two screw turns 17 and 18, but can also be designed with more screw turns.
  • the screw rib is welded onto the outer circumferential surface 19 of the shaft 11 in the form of a narrow steel band and is designed in such a way that the pitch of the upper screw pitch 18 is greater than the pitch of the lower screw pitch.
  • the upper screw path 18 ends at a displacement body 20 which is arranged at a distance from the lower end 11a of the shaft 11, surrounds it concentrically and can also be made in one piece with the shaft.
  • the displacement body consists of an upwardly widening, smooth-walled conical part 21 and a smooth-walled cylindrical part 22, the outer diameter D of which is as large as the outer diameter S of the screw rib 16.
  • the shaft 11 of the earth auger 10 carries a sleeve 23 made of steel, which is welded onto the shaft of the tube, but can also be made in one piece with it.
  • the largest outer diameter M of the sleeve 23 is as large as the outer diameter S of the screw rib and the axial length L of the sleeve 23 is greater than the axial thickness a of the screw rib 16.
  • the screw rib has a greater axial thickness and the individual screw threads are only a small distance apart, the axial length L should be greater than the smallest distance between two screw threads of the rib.
  • the axial length L should be greater than the smallest distance between two screw threads of the rib.
  • the cuff has 23 on its lower end face 24 two projecting claws 25, which serve to loosen the soil when the drill is brought down.
  • the cuff 23 also has at least one bottom entry opening 26 on its lower end face 24, into which a partial screw surface 27 opens, which extends from the upper end face 28 of the cuff 23 and to which the lower screw thread 17 of the screw rib 16 adjoins upwards.
  • the sleeve 23 has a cylindrical larger peripheral surface.
  • the outer circumferential surface 30 of the sleeve 23 is conical in such a way that it widens towards the lower end face 24. It can be seen from FIG. 4 that the largest outer diameter M on the lower end face of the sleeve 23 is larger than the outer diameter S of the screw rib 16, which corresponds to the outer diameter on the upper end face 28 of the sleeve 23.
  • the mode of operation of the earth auger shown and described is as follows: When the earth drill 10 is brought down into the ground, the drill is axially displaced in the direction of arrow 31 under pressure and at the same time slowly rotated clockwise in the direction of arrow 32 in the circumferential direction. Loosen the claws 25 on the lower end face 24 of the collar 23 and the soil loosening strip 15 on the drill bit plate 12 and thereby loosen the soil under the drill bit. A part of this loosened soil travels over the screw part surface 27 between the screw threads 17 and from there further between the screw threads 18 of the screw rib 16.
  • the loosened earth then reaches the area of the conical part 21 of the displacer 20, which drifts downwards with the drill and that pressing the earth into its area against the borehole wall and compacting it there.
  • the cylindrical part 22 then smoothes the compressed borehole wall and guides the drill in the borehole.
  • the bayonet lock between the lower end of the shaft and the drill bit plate 12 is released by a brief rotation counterclockwise as shown by the arrow 32.
  • a suitable pile reinforcement has been introduced into the interior 13 of the shank 11
  • fresh concrete is poured into this interior 13 and the earth drill 10 is slowly pulled up in the direction of the arrow 32, the earth drill being rotated very slowly in the direction of the arrow 32.
  • the fresh concrete emerges from the lower end of the tubular shaft 11 and rises in the borehole, the borehole wall being sealed off from the fresh concrete by the collar 23.
  • the sleeve 29 smoothes the borehole wall and compresses the soil in the region of the borehole wall, which is still loosened by the screw threads 17 and 18 of the screw rib 16. A particularly good compression is achieved here if the sleeve 23 has a conical outer circumferential surface 30 shown in FIG. 4.
  • the invention is not limited to the illustrated and described embodiments, but several changes and additions are possible without leaving the scope of the invention.
  • more than two screw turns can also be provided and it can also prove expedient to carry out all screw turns of the screw rib with the same pitch.

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Geology (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • Physics & Mathematics (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Structural Engineering (AREA)
  • Paleontology (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Earth Drilling (AREA)
EP93113869A 1992-09-01 1993-08-31 Trépan de forage pour former un pieu de béton dans le sol Expired - Lifetime EP0588143B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4228580A DE4228580C1 (de) 1992-09-01 1992-09-01 Erdbohrer zum Herstellen eines Ortbeton-Verdrängungspfahles
DE4228580 1992-09-01

Publications (2)

Publication Number Publication Date
EP0588143A1 true EP0588143A1 (fr) 1994-03-23
EP0588143B1 EP0588143B1 (fr) 1995-05-10

Family

ID=6466606

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93113869A Expired - Lifetime EP0588143B1 (fr) 1992-09-01 1993-08-31 Trépan de forage pour former un pieu de béton dans le sol

Country Status (3)

Country Link
EP (1) EP0588143B1 (fr)
DE (2) DE4228580C1 (fr)
DK (1) DK0588143T3 (fr)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0855489A2 (fr) * 1997-01-22 1998-07-29 Fundex N.V. Perçoir qui déplace la terre
EP1002902A1 (fr) * 1998-03-10 2000-05-24 Nippon Steel Corporation Pile enterree par rotation et procede de mise en place d'une telle pile
EP1118718A2 (fr) * 2000-01-20 2001-07-25 Compagnie Du Sol Equipement de fondation sur pieux à déplacement rotatif
EP1277887A3 (fr) * 2001-07-17 2004-09-08 Compagnie Du Sol Foret de déplacement et appareil utilisant ce foret
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.
EP1726718A1 (fr) * 2005-05-20 2006-11-29 SOILMEC S.p.A. Mèche de refoulement pour la réalisation d'un pieu dans la sol
CN106457360A (zh) * 2014-04-10 2017-02-22 森泰克有限公司 土钻和制造方法
CN109630041A (zh) * 2018-12-19 2019-04-16 中铁上海工程局集团有限公司 长螺杆钻杆及利用其引孔施工时提高细砂输送效率的方法
BE1027995B1 (nl) * 2020-01-16 2021-08-16 Olivier Ind Nv Grondverdringende boor en werkwijze voor het vormen van een gladde funderingspaal met een dergelijke grondverdringende boor

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE1009519A3 (nl) * 1995-06-08 1997-04-01 B A Olivier Betonfabriek En Fu Werkwijze voor het vervaardigen van grondverdringende schroefpalen.
DE19530718C1 (de) * 1995-08-21 1996-09-26 Bauer Spezialtiefbau Bohrvorrichtung und Verfahren zur Herstellung eines Pfahles in einem Bohrloch
DE19616593C2 (de) * 1996-04-25 1998-07-02 Bauer Spezialtiefbau Betonierschutz für Endlosschnecken
DE19651586C2 (de) * 1996-12-11 1999-02-11 Bauer Spezialtiefbau Bohrvorrichtung für Teilverdrängungspfähle
DE19734068B4 (de) * 1997-08-06 2007-07-05 Beheersmaatschappij Verstraeten B.V. Bohrspitze
DE19744322C1 (de) * 1997-10-08 1999-01-28 Juergen Kretschmar Verfahren und Vorrichtung zum Einbringen von Ankern in sandigen, kiesigen oder bindigen Böden
DE10006973C2 (de) * 2000-02-16 2002-03-14 Bauer Spezialtiefbau Rüttelverdränger-Schnecke
DE10346040A1 (de) 2003-10-02 2005-05-25 Bauer Maschinen Gmbh Verfahren und Prüfanordnung zum Bestimmen des Tragverhaltens von Verdrängungspfählen
DE102006023799B4 (de) * 2006-05-20 2014-05-15 Franki Grundbau Gmbh & Co.Kg Vorrichtung zur Herstellung von Gründungselementen
DE102013104184A1 (de) 2013-04-25 2014-10-30 GEPRO Ingenieurgesellschaft für Geotechnik, Verkehrs- und Tiefbau und Umweltschutz mbH Trägerstütze zur Aufnahme eines Trägermittels für eine Lärmschutzwand
DE102013104179A1 (de) 2013-04-25 2014-10-30 GEPRO Ingenieurgesellschaft für Geotechnik, Verkehrs- und Tiefbau und Umweltschutz mbH Einrichtung zur Aufnahme von Horizontalkräften an einer Pfahlstütze und die Verwendung der Einrichtung bei der Montage einer Pfahlstütze
CA2980681C (fr) * 2015-04-09 2019-05-07 Jaron Lyell Mcmillan Accessoire a dent pour foret et foret equipe de celui-ci
FR3047511B1 (fr) * 2016-02-10 2018-03-16 Soletanche Freyssinet Dispositif et procede d'obturation de forage
BE1028932B1 (nl) * 2020-12-23 2022-07-18 Noterman Putboringen Boorvoorziening en werkwijze voor het vervaardigen van een in de grond gevormde grondverdringende schroefpaal

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2320610A (en) * 1940-10-21 1943-06-01 Charles W Kandle Drill bit
US2401250A (en) * 1943-09-30 1946-05-28 Charles W Kandle Earth drill
US3962879A (en) * 1973-05-03 1976-06-15 Turzillo Lee A Reinforced pile in earth situs and method of producing same
FR2504168A1 (fr) * 1981-04-17 1982-10-22 Fondedile Spa Procede pour l'execution dans le terrain d'ouvrages annulaires pour des destinations diverses telles que la construction de pieux de fondation a noyau creux; equipement pour l'execution dudit procede et structures obtenues
FR2534292A1 (fr) * 1982-10-06 1984-04-13 Sainrapt Brice Procede de mise en place de buses de fondation dans un terrain de mauvaise qualite
EP0126409A2 (fr) * 1983-05-18 1984-11-28 Hawera Probst GmbH + Co. Outil de forage
US4854396A (en) * 1988-12-21 1989-08-08 The United States Of America As Represented By The Secretary Of The Army Pivoting cutter for ice coring auger
EP0378348A1 (fr) * 1989-01-09 1990-07-18 Katsumi Kitanaka Procédé et dispositif pour la réalisation de pieux coulés en place
US4949795A (en) * 1988-07-11 1990-08-21 Gas Research Institute Rotary rapid excavation system
US5078219A (en) * 1990-07-16 1992-01-07 The United States Of America As Represented By The Secretary Of The Interior Concave drag bit cutter device and method
US5158147A (en) * 1991-08-09 1992-10-27 Mobile Drilling Company, Inc. Auger cutter head

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE903965A (nl) * 1985-12-31 1986-04-16 Coelus Gaspar Jozef Apparaat en methode om boorpalen uit te voeren.

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2320610A (en) * 1940-10-21 1943-06-01 Charles W Kandle Drill bit
US2401250A (en) * 1943-09-30 1946-05-28 Charles W Kandle Earth drill
US3962879A (en) * 1973-05-03 1976-06-15 Turzillo Lee A Reinforced pile in earth situs and method of producing same
FR2504168A1 (fr) * 1981-04-17 1982-10-22 Fondedile Spa Procede pour l'execution dans le terrain d'ouvrages annulaires pour des destinations diverses telles que la construction de pieux de fondation a noyau creux; equipement pour l'execution dudit procede et structures obtenues
FR2534292A1 (fr) * 1982-10-06 1984-04-13 Sainrapt Brice Procede de mise en place de buses de fondation dans un terrain de mauvaise qualite
EP0126409A2 (fr) * 1983-05-18 1984-11-28 Hawera Probst GmbH + Co. Outil de forage
US4949795A (en) * 1988-07-11 1990-08-21 Gas Research Institute Rotary rapid excavation system
US4854396A (en) * 1988-12-21 1989-08-08 The United States Of America As Represented By The Secretary Of The Army Pivoting cutter for ice coring auger
EP0378348A1 (fr) * 1989-01-09 1990-07-18 Katsumi Kitanaka Procédé et dispositif pour la réalisation de pieux coulés en place
US5078219A (en) * 1990-07-16 1992-01-07 The United States Of America As Represented By The Secretary Of The Interior Concave drag bit cutter device and method
US5158147A (en) * 1991-08-09 1992-10-27 Mobile Drilling Company, Inc. Auger cutter head

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0855489A3 (fr) * 1997-01-22 1999-04-21 Fundex N.V. Perçoir qui déplace la terre
US6082472A (en) * 1997-01-22 2000-07-04 Fundex N.V. Earth displacement drill
EP0855489A2 (fr) * 1997-01-22 1998-07-29 Fundex N.V. Perçoir qui déplace la terre
CN1298939C (zh) * 1998-03-10 2007-02-07 新日本制铁株式会社 旋转埋设桩
EP1002902A1 (fr) * 1998-03-10 2000-05-24 Nippon Steel Corporation Pile enterree par rotation et procede de mise en place d'une telle pile
EP1002902A4 (fr) * 1998-03-10 2004-06-09 Nippon Steel Corp Pile enterree par rotation et procede de mise en place d'une telle pile
US6881014B2 (en) 1998-03-10 2005-04-19 Nippon Steel Corporation Screwed steel pile and method of construction management therefor
EP1118718A2 (fr) * 2000-01-20 2001-07-25 Compagnie Du Sol Equipement de fondation sur pieux à déplacement rotatif
EP1118718A3 (fr) * 2000-01-20 2002-10-23 Compagnie Du Sol Equipement de fondation sur pieux à déplacement rotatif
EP1277887A3 (fr) * 2001-07-17 2004-09-08 Compagnie Du Sol Foret de déplacement et appareil utilisant ce foret
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.
EP1726718A1 (fr) * 2005-05-20 2006-11-29 SOILMEC S.p.A. Mèche de refoulement pour la réalisation d'un pieu dans la sol
US7357199B2 (en) 2005-05-20 2008-04-15 Soilmec S.P.A. Bit for excavation and compaction equipment for erecting piles, and excavation equipment provided with said bit
CN106457360A (zh) * 2014-04-10 2017-02-22 森泰克有限公司 土钻和制造方法
EP3129172A4 (fr) * 2014-04-10 2017-11-22 Sentek Pty Ltd. Tarière et procédé de fabrication
US10589332B2 (en) 2014-04-10 2020-03-17 Sentek Pty Ltd Soil auger and method of manufacture
CN109630041A (zh) * 2018-12-19 2019-04-16 中铁上海工程局集团有限公司 长螺杆钻杆及利用其引孔施工时提高细砂输送效率的方法
CN109630041B (zh) * 2018-12-19 2024-01-23 中铁上海工程局集团有限公司 长螺杆钻杆及利用其引孔施工时提高细砂输送效率的方法
BE1027995B1 (nl) * 2020-01-16 2021-08-16 Olivier Ind Nv Grondverdringende boor en werkwijze voor het vormen van een gladde funderingspaal met een dergelijke grondverdringende boor

Also Published As

Publication number Publication date
DE4228580C1 (de) 1993-10-28
EP0588143B1 (fr) 1995-05-10
DE59300184D1 (de) 1995-06-14
DK0588143T3 (da) 1995-07-17

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