EP0012486B1 - Method and apparatus for forming a reinforced concrete pile in an earth situs - Google Patents

Method and apparatus for forming a reinforced concrete pile in an earth situs Download PDF

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Publication number
EP0012486B1
EP0012486B1 EP19790200750 EP79200750A EP0012486B1 EP 0012486 B1 EP0012486 B1 EP 0012486B1 EP 19790200750 EP19790200750 EP 19790200750 EP 79200750 A EP79200750 A EP 79200750A EP 0012486 B1 EP0012486 B1 EP 0012486B1
Authority
EP
European Patent Office
Prior art keywords
auger
hole
concrete
pipes
reinforcing rods
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
Application number
EP19790200750
Other languages
German (de)
French (fr)
Other versions
EP0012486A1 (en
Inventor
Karel Frederik Brons
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.)
Hollandsche Beton Groep NV
Original Assignee
Hollandsche Beton Groep NV
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Filing date
Publication date
Application filed by Hollandsche Beton Groep NV filed Critical Hollandsche Beton Groep NV
Publication of EP0012486A1 publication Critical patent/EP0012486A1/en
Application granted granted Critical
Publication of EP0012486B1 publication Critical patent/EP0012486B1/en
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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

Definitions

  • the invention relates to a method for forming a reinforced concrete pile in an earth situs, in which a hollow-shafted auger provided with a helical blade is screwed into the earth situs and in which reinforcing rods are introduced into the hole by means of said auger, whilst concrete is fed into the hole through the hollow-shaft of the auger as the auger is withdrawn from the hole during which withdrawal the reinforcing rods are caused to remain in the concrete in the hole.
  • Purpose of the invention is to provide a method by means of which said disadvantages are avoided.
  • this purpose is achieved in that the helical blade of the auger is provided with series of aligned openings or indents through which during the drilling operation bars or pipes extend, that prior to the withdrawal of the auger and the introduction of the concrete the reinforcing rods are placed so as to extend through the series of aligned openings or indents or through the pipes and that during the introduction of the concrete the auger is non-rotatably withdrawn whilst the reinforcing rods are caused to remain in the hole.
  • the bars are preferably the reinforcing rods which remain in the hole when the auger is being withdrawn.
  • the reinforcing rods are passed therethrough before the auger is withdrawn.
  • Said pipes can contain the reinforcing rods already during the drilling operation but said rods can also be inserted at the end of the drilling operation.
  • the withdrawing takes place without rotation so that the rods for reinforcing the concrete of the pile remain in their proper position.
  • the reinforcing rods with the method of the invention are placed outside the hollow shaft of the auger they can be located at the proper place with respect to the outer wall of the concrete pile and it is not necessary to provide the auger with a removable drill bit which remains in the hole. If a drill bit is used it can be used again and again because it forms an integral part of the auger.
  • a diagrammatic representation of part of a framework is indicated by reference numeral 1 and the gear case 2 of the auger is movable in vertical direction along said framework.
  • the auger 3 comprises a hollow core or shaft 4 and communicates with a hose 5 through casing 2; concrete is fed through said hose.
  • the hollow core is surrounded by a helical blade 6 which, preferably, constitutes a continuous helical line.
  • Pipes 7 and 8 pass through a series of openings running parallel to the centre line of the auger and a reinforcing rod 9 may be inserted into said pipes.
  • rods 9 are positioned within pipes 7 and 8 and in other pipes, if required, whereupon the auger is non-rotatably withdrawn while leaving the rods behind in the hole; simultaneously, said hole is filled by feeding concrete into the bottom of the hole through hose 5 and hollow core 4.
  • the helical blade instead of pipes, it is also possible to provide the helical blade with indents 10 or openings 11 (Fig. 2). During the drilling operation there are bars in said openings or indents and, preferably, they are reinforcing rods which remain behind in the hole when the auger is withdrawn.
  • the pipes may be closed, e.g. by a plug, said plug being removed by the rods. It is now possible to install clean rods, i.e. which are not fouled by earth, and thus the adhesion between rods and concrete will be improved.

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  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Paleontology (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Piles And Underground Anchors (AREA)

Description

  • The invention relates to a method for forming a reinforced concrete pile in an earth situs, in which a hollow-shafted auger provided with a helical blade is screwed into the earth situs and in which reinforcing rods are introduced into the hole by means of said auger, whilst concrete is fed into the hole through the hollow-shaft of the auger as the auger is withdrawn from the hole during which withdrawal the reinforcing rods are caused to remain in the concrete in the hole.
  • Such a method is known from U.S. specification 3.464.216. According to said known method at the end of the drilling operation reinforcing rods are inserted through the interior of the hollow shaft of the auger and in doing this are used to disconnect the driving bit from the auger when the latter is withdrawn. The disadvantage of said known method accordingly is that the reinforcing rods are concentrated too far from the outer side of the pile which means too far from the region where they are needed to take up stress during bending of the pile whilst furthermore with the construction of each pile the drill bit is lost and a new one has to be used.
  • Purpose of the invention is to provide a method by means of which said disadvantages are avoided.
  • According to the invention this purpose is achieved in that the helical blade of the auger is provided with series of aligned openings or indents through which during the drilling operation bars or pipes extend, that prior to the withdrawal of the auger and the introduction of the concrete the reinforcing rods are placed so as to extend through the series of aligned openings or indents or through the pipes and that during the introduction of the concrete the auger is non-rotatably withdrawn whilst the reinforcing rods are caused to remain in the hole.
  • This means that during the drilling operation an auger is used, the turns of the blade of which are coupled to each other in the longitudinal direction of the auger by bars or pipes which have to cooperate with the rotating auger and which therefore, have to move with respect to the earth present between the turns of the helical auger blade. Surprisingly it was found that this did not lead to problems and that the auger is properly filled with earth with only the earth which is substantially outside the rods or pipes but within the circumference of the auger being slightly stirred.
  • When the auger in this way has been properly installed at its required depth the bars could be replaced by the reinforcing rods which are necessary for the concrete pile. This replacement of the bars by the reinforcing rods can be taken into consideration when there is a risk that during the drilling operation a comparative thin reinforcing rod might bend. To avoid this during drilling thick bars can be used which are withdrawn when the drilling has been completed and which are then replaced by the reinforcing rods.
  • Naturally the bars are preferably the reinforcing rods which remain in the hole when the auger is being withdrawn. When pipes are used the reinforcing rods are passed therethrough before the auger is withdrawn. Said pipes can contain the reinforcing rods already during the drilling operation but said rods can also be inserted at the end of the drilling operation.
  • The withdrawing takes place without rotation so that the rods for reinforcing the concrete of the pile remain in their proper position.
  • It is thus achieved that the concrete supplied through the hollow core of the auger surrounds the reinforcing rods when they are already positioned in the hole.
  • Due to the fact that the reinforcing rods with the method of the invention are placed outside the hollow shaft of the auger they can be located at the proper place with respect to the outer wall of the concrete pile and it is not necessary to provide the auger with a removable drill bit which remains in the hole. If a drill bit is used it can be used again and again because it forms an integral part of the auger.
  • It is observed that from U.S. specification 4.022.286 an auger is known having a hollow shaft and a helical blade which helical blade at its outer edge has been provided with a plurality of indents which in a direction parallel to the axis of the hollow shaft are in line. Said recesses are at the location of spray means having their outlet opening at their inner edge of the indent.
  • The invention will now be elucidated more in detail with reference to the accompanying drawings, where:
    • Fig. 1 illustrates one embodiment of the method with an apparatus in accordance with the invention; and
    • Fig. 2 illustrates a variant.
  • In Fig. 1, a diagrammatic representation of part of a framework is indicated by reference numeral 1 and the gear case 2 of the auger is movable in vertical direction along said framework. The auger 3 comprises a hollow core or shaft 4 and communicates with a hose 5 through casing 2; concrete is fed through said hose. The hollow core is surrounded by a helical blade 6 which, preferably, constitutes a continuous helical line. Pipes 7 and 8 pass through a series of openings running parallel to the centre line of the auger and a reinforcing rod 9 may be inserted into said pipes.
  • When the borehole has its requisite depth, as shown in Fig. 1, rods 9 are positioned within pipes 7 and 8 and in other pipes, if required, whereupon the auger is non-rotatably withdrawn while leaving the rods behind in the hole; simultaneously, said hole is filled by feeding concrete into the bottom of the hole through hose 5 and hollow core 4.
  • Instead of pipes, it is also possible to provide the helical blade with indents 10 or openings 11 (Fig. 2). During the drilling operation there are bars in said openings or indents and, preferably, they are reinforcing rods which remain behind in the hole when the auger is withdrawn.
  • At their lower ends, the pipes may be closed, e.g. by a plug, said plug being removed by the rods. It is now possible to install clean rods, i.e. which are not fouled by earth, and thus the adhesion between rods and concrete will be improved.
  • It is also possible to carry out sounding tests through the pipes in order to check the assumed bearing capacity of the floor of the borehole.

Claims (3)

1. A method for forming a reinforced concrete pile in an earth situs, in which a hollow-shafted auger (3) provided with a helical blade (6) is screwed into the earth situs and in which reinforcing rods (9) are introduced into the hole by means of said auger, whilst concrete is fed into the hole through the hollow-shaft (4) of the auger as the auger is withdrawn from the hole, during which withdrawal the reinforcing rods are caused to remain in the concrete in the hole, characterized in that the helical blade (6) of the auger (3) is provided with series of aligned openings (11) or indents (10) through which during the drilling operation bars or pipes (7) extend, that prior to the withdrawal of the auger and the introduction of the concrete the reinforcing rods (9) are placed so as to extend through the series of aligned openings (11) or indents (10) or through the pipes (7) and that during the introduction of the concrete the auger is non-rotatably withdrawn whilst the reinforcing rods (9) are caused to remain in the hole.
2. Method according to claim 1, characterized in that the bars present in the openings (11) or indents (10) during the drilling operation are the reinforcing rods (9) which remain in the hole.
3. Auger for applying the method according to claim 1 comprising a hollow shaft (4) and a helical blade (6), characterized in that pipes (7) are secured in series of aligned openings (11) or indents (10) provided in the helical blade (6), said pipes running parallel to the center line of the auger and having a length which is substantially the same as the length of the auger, each pipe having a bore adapted to receive a reinforcing rod (9).
EP19790200750 1978-12-12 1979-12-11 Method and apparatus for forming a reinforced concrete pile in an earth situs Expired EP0012486B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL7812084A NL7812084A (en) 1978-12-12 1978-12-12 METHOD AND APPARATUS FOR MANUFACTURING AN ARMED CONCRETE POST IN THE GROUND.
NL7812084 1978-12-12

Publications (2)

Publication Number Publication Date
EP0012486A1 EP0012486A1 (en) 1980-06-25
EP0012486B1 true EP0012486B1 (en) 1982-05-12

Family

ID=19832058

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19790200750 Expired EP0012486B1 (en) 1978-12-12 1979-12-11 Method and apparatus for forming a reinforced concrete pile in an earth situs

Country Status (5)

Country Link
EP (1) EP0012486B1 (en)
DE (1) DE2962854D1 (en)
HK (1) HK66183A (en)
MY (1) MY8500047A (en)
NL (1) NL7812084A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004005967A1 (en) * 2004-02-06 2005-09-08 Bauer Spezialtiefbau Gmbh Archimedean screw for placing concrete in ground for construction of vertical walls in ground with mixed-in-place concrete has single spiral fin with cutouts surrounding circular-section tube

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8905166U1 (en) * 1989-04-12 1990-06-28 Delmag Maschinenfabrik Reinhold Dornfeld Gmbh & Co, 7300 Esslingen, De
NL193640C (en) * 1990-03-02 2000-05-04 Fundamentum Bv Assembly for the manufacture of a foundation pile in the ground as well as a method for operating that assembly.
GB2355750B (en) * 1999-10-30 2003-12-17 Kvaerner Cementation Found Ltd Forming piles
GB2356882A (en) * 1999-11-12 2001-06-06 Kvaerner Cementation Found Ltd An auger with a cutting element having recesses
US10456762B1 (en) 2015-03-26 2019-10-29 Juneau County, a Wisconsin body corporate Machine for mixing and conveying a road application mixture and the methods of use thereof

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1343902A (en) * 1918-06-10 1920-06-22 American Well Works Weli-sinking apparatus
US1604722A (en) * 1924-08-04 1926-10-26 Alexander G Rotinoff Pile
FR69922E (en) * 1956-03-27 1959-01-09 Pile driver
US3363422A (en) * 1965-03-19 1968-01-16 Lee A. Turzillo Method and apparatus for anchoring a tie-down bar in an earth situs
US3464216A (en) * 1968-01-08 1969-09-02 Lee A Turzillo Method and means for forming cast-inplace reinforced concrete pile
US4022286A (en) * 1975-09-05 1977-05-10 Leeco, Inc. Auger

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004005967A1 (en) * 2004-02-06 2005-09-08 Bauer Spezialtiefbau Gmbh Archimedean screw for placing concrete in ground for construction of vertical walls in ground with mixed-in-place concrete has single spiral fin with cutouts surrounding circular-section tube

Also Published As

Publication number Publication date
HK66183A (en) 1983-12-23
NL7812084A (en) 1980-06-16
MY8500047A (en) 1985-12-31
EP0012486A1 (en) 1980-06-25
DE2962854D1 (en) 1982-07-01

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