EP0371533A1 - Method for providing concrete foundation piles and hallow earth drill to be used for that purpose - Google Patents
Method for providing concrete foundation piles and hallow earth drill to be used for that purpose Download PDFInfo
- Publication number
- EP0371533A1 EP0371533A1 EP89202872A EP89202872A EP0371533A1 EP 0371533 A1 EP0371533 A1 EP 0371533A1 EP 89202872 A EP89202872 A EP 89202872A EP 89202872 A EP89202872 A EP 89202872A EP 0371533 A1 EP0371533 A1 EP 0371533A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- tube
- ground
- concrete
- discharge opening
- valve
- 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
Links
- 238000000034 method Methods 0.000 title claims abstract description 11
- 238000005553 drilling Methods 0.000 claims description 4
- 230000003014 reinforcing effect Effects 0.000 claims description 3
- 238000005056 compaction Methods 0.000 description 3
- 230000001419 dependent effect Effects 0.000 description 2
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Images
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
- E02D5/38—Concrete or concrete-like piles cast in position ; Apparatus for making same making by use of mould-pipes or other moulds
- E02D5/385—Concrete or concrete-like piles cast in position ; Apparatus for making same making by use of mould-pipes or other moulds with removal of the outer mould-pipes
-
- 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
- E02D5/66—Mould-pipes or other moulds
- E02D5/665—Mould-pipes or other moulds for making piles
-
- 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
- E02D5/72—Pile shoes
-
- 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
- E21B10/60—Drill bits characterised by conduits or nozzles for drilling fluids
Definitions
- the invention relates to a method for providing concrete foundation piles in the ground, whereby a tube provided with a helical blade on its periphery is screwed into the ground to the desired depth, after which, while the tube is being withdrawn, concrete is introduced in the hole formed by means of the tube through the interior of the tube, via a discharge opening located near the bottom side of said tube.
- Such a method can be derived from the European patent 0010037. This method makes use of a tube whose bottom end has a larger diameter than the remaining part of the tube. In said part having a larger diameter there is provided a hydraulically operated adjusting mechanism for opening and closing a valve closing the bottom side of the tube.
- a first disadvantage is constituted by the fact that the shape of the bottom end of the tube is less suitable for promoting the penetration of the tube into the ground. Besides that it will be possible for the earth moved sideways by the bottom end of the tube to move back into the hole formed by the bottom end of the tube, as a result of which no effective compaction of the earth is achieved, and possible narrowings may be formed in the freshly formed pile shaft.
- a similar method can be derived from FR-A-438,488. From US-A- 3,875,751 a method can be derived whereby a column of earth is loosened by means of a short helical blade secured on the end of a thin shaft, after which concrete is injected into the hole. Also in this case no essential compaction of the earth around the foundation pile will be effected.
- the object of the invention is to meet the disadvantages of the known method and device respectively.
- this objective can be accomplished in that use is made of a tube having a constant diameter along at least substantially its entire length, whose bottom end, along which the end of the helical blade extends, is conical, whereby, when the tube is being withdrawn from the ground, concrete is supplied under pressure and pressed out of the tube via the discharge opening, a closing means of said discharge opening being opened under the influence of the pressure exerted by the concrete.
- the tube When using the method according to the invention the tube can be screwed into the ground while effectively compacting the earth surrounding the tube, whilst the concrete can be pressed into the hole formed by the tube while maintaining an effective pressure when the tube is being withdrawn in a non- rotating manner.
- a particularly advantageous embodiment of a hollow earth drill for drilling holes in the ground with a view to making concrete foundation piles in the ground, with a tube provided with a helical blade on its periphery can thereby be obtained if the tube has a constant diameter along at least substantially its entire length, whilst the bottom end of the tube, along which the end of the helical blade extends, is conical and is provided with a discharge opening, which can be closed by means of a valve pivotally connected with the tube.
- Fig 1 For drilling holes in the ground with a view to making concrete foundation piles in the ground use is made of the tube 1 illustrated in Fig 1, which tube may have any desired length and may be built up of several sections to be coupled with each other.
- the preferably thick-walled tube 1 has a constant diameter along at least substantially its entire length, whilst in the interior of the tube 1 there is provided a central passage 2 extending along the entire length of the tube.
- a helical blade 3 which extends along the entire length of the tube and also along the conical bottom end 4 of the tube, therefore.
- said conical end 4 there is provided an opening 5 in the wall of the tube, which opening can be closed by means of a valve 6.
- said valve 6 is coupled to the tube 1 by means of a pivot pin 7 extending upwards and being located near one side of the valve 6. The valve 6 can thereby pivot freely about the pivot pin 7 between the position illustrated in Fig 2, in which the valve 6 closes the opening 5, and an open position illustrated in Fig 3.
- the lower part 8 of the valve 6 thereby forms the point of the tube 1 in the closed position, so that in the open position of the valve the opening 5 not only extends into the side of the conical end 4, but also along along the bottom end of the tube, so that the tube is open at its bottom side then.
- Forming the concrete foundation pile in the ground can be done in the desired manner by measuring the torque exerted on the tube 1 when the tube is being screwed into the ground, and/or by controlling the pressure at which the concrete is being pressed into the borehole when the tube 1 is being withdrawn, dependent on and related to the depth at which the outlet opening at the bottom end of the tube is located. These parameters can also be registered simultaneously during operation.
- a thick-walled tube 1 instead of a thick-walled tube 1 also a double-walled tube may be used.
- the external diameter of the helical block may vary between e.g. 320 - 620 mm and the external diameter of the tube 1 may vary between e.g. 220 - 420 mm.
- the diameter of the passage 2 is 125 mm thereby.
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Structural Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Paleontology (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Geochemistry & Mineralogy (AREA)
- Piles And Underground Anchors (AREA)
- Earth Drilling (AREA)
Abstract
Description
- The invention relates to a method for providing concrete foundation piles in the ground, whereby a tube provided with a helical blade on its periphery is screwed into the ground to the desired depth, after which, while the tube is being withdrawn, concrete is introduced in the hole formed by means of the tube through the interior of the tube, via a discharge opening located near the bottom side of said tube.
- Such a method can be derived from the European patent 0010037. This method makes use of a tube whose bottom end has a larger diameter than the remaining part of the tube. In said part having a larger diameter there is provided a hydraulically operated adjusting mechanism for opening and closing a valve closing the bottom side of the tube.
- A first disadvantage is constituted by the fact that the shape of the bottom end of the tube is less suitable for promoting the penetration of the tube into the ground. Besides that it will be possible for the earth moved sideways by the bottom end of the tube to move back into the hole formed by the bottom end of the tube, as a result of which no effective compaction of the earth is achieved, and possible narrowings may be formed in the freshly formed pile shaft.
- Besides that the earth drill is vulnerable, in particular in connection with the adjusting mechanism for the valve closing the tube at the bottom side and the hydraulic lines required for that purpose, and in view of the rough operation to which such an earth drill is exposed.
- A similar method can be derived from FR-A-438,488. From US-A- 3,875,751 a method can be derived whereby a column of earth is loosened by means of a short helical blade secured on the end of a thin shaft, after which concrete is injected into the hole. Also in this case no essential compaction of the earth around the foundation pile will be effected.
- The object of the invention is to meet the disadvantages of the known method and device respectively.
- According to the invention this objective can be accomplished in that use is made of a tube having a constant diameter along at least substantially its entire length, whose bottom end, along which the end of the helical blade extends, is conical, whereby, when the tube is being withdrawn from the ground, concrete is supplied under pressure and pressed out of the tube via the discharge opening, a closing means of said discharge opening being opened under the influence of the pressure exerted by the concrete.
- When using the method according to the invention the tube can be screwed into the ground while effectively compacting the earth surrounding the tube, whilst the concrete can be pressed into the hole formed by the tube while maintaining an effective pressure when the tube is being withdrawn in a non- rotating manner.
- According to a further aspect of the invention a particularly advantageous embodiment of a hollow earth drill for drilling holes in the ground with a view to making concrete foundation piles in the ground, with a tube provided with a helical blade on its periphery, can thereby be obtained if the tube has a constant diameter along at least substantially its entire length, whilst the bottom end of the tube, along which the end of the helical blade extends, is conical and is provided with a discharge opening, which can be closed by means of a valve pivotally connected with the tube.
- When using this construction a hollow earth drill having a particularly simple design can be obtained, by means of which an even displacement and compaction of the earth around the tube can be obtained when the tube is being screwed into the ground, whilst the valve can be pressed open by means of the concrete supplied through the hollow tube and being under pressure, in order to make it possible that concrete is pressed into the hole formed by the tube at the correct pressure.
- The invention will be further explained hereinafter with reference to a possible embodiment, diagrammatically illustrated in the accompanying figures, of a tube provided with a helical blade.
- Fig 1 is an elevational view of a part of a tube for drilling a hole in the ground.
- Fig 2 is a larger-scale illustration of the lower part of the tube, with a valve closing the bottom end of the tube in the closed position.
- Fig 3 is an elevational view, corresponding with Fig 2, of the valve in the open position.
- Fig 4 is an elevational view of Fig 3, seen according to the arrow IV.
- For drilling holes in the ground with a view to making concrete foundation piles in the ground use is made of the tube 1 illustrated in Fig 1, which tube may have any desired length and may be built up of several sections to be coupled with each other. The preferably thick-walled tube 1 has a constant diameter along at least substantially its entire length, whilst in the interior of the tube 1 there is provided a central passage 2 extending along the entire length of the tube.
- Around the outer periphery of the tube 1 there is provided a
helical blade 3, which extends along the entire length of the tube and also along theconical bottom end 4 of the tube, therefore. - In said
conical end 4 there is provided anopening 5 in the wall of the tube, which opening can be closed by means of a valve 6. As appears from the Figs 2 and 3 said valve 6 is coupled to the tube 1 by means of a pivot pin 7 extending upwards and being located near one side of the valve 6. The valve 6 can thereby pivot freely about the pivot pin 7 between the position illustrated in Fig 2, in which the valve 6 closes theopening 5, and an open position illustrated in Fig 3. - As appears from the Figs 2 and 3 the
lower part 8 of the valve 6 thereby forms the point of the tube 1 in the closed position, so that in the open position of the valve theopening 5 not only extends into the side of theconical end 4, but also along along the bottom end of the tube, so that the tube is open at its bottom side then. - When the tube is being screwed into the ground the earth around the hole formed by the tube will be compacted. Because the pivot pin 7 is located in front of the valve 6, seen in the direction of rotation, when the tube is being screwed into the ground, the valve 6 will be automatically kept in its closed position thereby.
- After the tube has been screwed into the ground to the desired depth, concrete can be pressed to the bottom end of the tube through the passage 2. When the tube is being withdrawn the valve 6 will be pressed open automatically by the concrete which is under pressure, so that when the tube is being screwed back the concrete is pressed into the hole formed by the tube at the correct pressure.
- Before the injecting of the concrete is started it will for example be possible to place a central steel reinforcing rod in the passage 2. Because an opening is also formed at the bottom side of the tube when the valve 6 opens said reinforcing bar can remain behind in the ground, surrounded by the injected concrete, when the tube 1 is being screwed back. After all the concrete required has been injected and the tube 1 has been removed from the borehole, it will also be possible to vibrate a reinforcement basket of reinforcing steel into the fresh concrete by means of a vibrating means. Also it will be possible for any desired profiles or the like to be vibrated into the fresh concrete.
- Forming the concrete foundation pile in the ground can be done in the desired manner by measuring the torque exerted on the tube 1 when the tube is being screwed into the ground, and/or by controlling the pressure at which the concrete is being pressed into the borehole when the tube 1 is being withdrawn, dependent on and related to the depth at which the outlet opening at the bottom end of the tube is located. These parameters can also be registered simultaneously during operation.
- Instead of a thick-walled tube 1 also a double-walled tube may be used.
- Dependent on the requirements made of a foundation pile and its dimensions the external diameter of the helical block may vary between e.g. 320 - 620 mm and the external diameter of the tube 1 may vary between e.g. 220 - 420 mm.
- The diameter of the passage 2 is 125 mm thereby.
- Of course also other values are conceivable within the scope of the invention.
Claims (6)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT89202872T ATE73513T1 (en) | 1988-11-30 | 1989-11-13 | METHOD OF MAKING CONCRETE BASE PILES AND HOLLOW BASE DRILL USED THERETO. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL8802944A NL8802944A (en) | 1988-11-30 | 1988-11-30 | METHOD FOR APPLICATION OF CONCRETE FOUNDATION POSTS AND HOLLOW DRILL FOR USE THEREFOR |
NL8802944 | 1988-11-30 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0371533A1 true EP0371533A1 (en) | 1990-06-06 |
EP0371533B1 EP0371533B1 (en) | 1992-03-11 |
Family
ID=19853311
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP89202872A Expired - Lifetime EP0371533B1 (en) | 1988-11-30 | 1989-11-13 | Method for providing concrete foundation piles and hallow earth drill to be used for that purpose |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP0371533B1 (en) |
AT (1) | ATE73513T1 (en) |
DE (1) | DE68900977D1 (en) |
ES (1) | ES2029924T3 (en) |
NL (1) | NL8802944A (en) |
Cited By (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19616593A1 (en) * | 1996-04-25 | 1997-11-06 | Bauer Spezialtiefbau | Device for closing and opening of concrete opening of continuous screw |
WO2000040808A1 (en) * | 1999-01-07 | 2000-07-13 | Menard Soltraitement | Method and device for forming a foundation pipe pile in the ground |
WO2000050358A1 (en) * | 1999-02-25 | 2000-08-31 | Menard Soltraitement | Concrete comprising an elastic substance and pile made of such a concrete |
US6824331B2 (en) * | 2000-04-10 | 2004-11-30 | Clifford Alan Parker | Screw form anchor device |
NL1025689C2 (en) * | 2004-03-10 | 2005-09-20 | Konink Bam Groep Nv | Borehole tube for sinking foundation piles, has closed bottom end with convex shape |
NL1027112C2 (en) | 2004-09-24 | 2006-03-27 | Ecodrie B V | Earth auger useful for fabricating foundation piles comprises a cylindrical drill body with a drill tip whose outer surface is indented with respect to the drill body |
GB2424430A (en) * | 2005-03-22 | 2006-09-27 | Roxbury Ltd | Method of introducing ground loops or pile reinforcing bars into the ground |
EP1726718A1 (en) * | 2005-05-20 | 2006-11-29 | SOILMEC S.p.A. | Bit for excavation and compaction equipment for erecting piles, and excavation equipment provided with said bit |
EP1734222A1 (en) * | 2005-06-14 | 2006-12-20 | BAUER Maschinen GmbH | System for making concrete piles in a ground and drilling- tool therefor |
NL1029541C2 (en) * | 2005-07-15 | 2007-01-16 | Ecodrie B V | Screw injection drill is used for production of foundation column and comprises shaft provided with at least one injection aperture and screw blade |
ITTO20090310A1 (en) * | 2009-04-20 | 2010-10-21 | Soilmec Spa | EXCAVATION AND CONSTIPATION EQUIPMENT FOR CONSTRUCTION OF SCREW POLES. |
NL2005298C2 (en) * | 2010-09-01 | 2012-03-05 | Jan Vos | COMPOSITION OF TUBE AND DRILL HEAD AND METHOD FOR FORMING A BODY OF MATERIAL IN A BOTTOM. |
NL2009919C2 (en) * | 2012-11-30 | 2014-06-04 | Digi Exchange V O F | INJECTION DRILL FOR MANUFACTURING A CONSTRUCTION ELEMENT IN A BOTTOM. |
US9217293B1 (en) | 2014-10-17 | 2015-12-22 | Berkel & Company Contractors, Inc. | Reversible displacement auger tool |
US9512588B2 (en) | 2014-10-17 | 2016-12-06 | Berkel & Company Contractors, Inc. | Reversible displacement auger tool |
CN107386282A (en) * | 2017-07-20 | 2017-11-24 | 重庆交通大学 | A kind of embedded rock pile shape of threads steel pile casting crept into and its application method |
EP3299520A2 (en) | 2016-09-27 | 2018-03-28 | Kroeze Holding B.V. | Stabilization of dikes |
NL2018306B1 (en) * | 2017-02-03 | 2018-08-28 | European Found Group B V | Auger and method for manufacturing drill piles |
NL2018390B1 (en) * | 2017-02-17 | 2018-09-17 | European Found Group B V | Auger and method for manufacturing a drill pile |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR438488A (en) * | 1911-12-06 | 1912-05-18 | Heinrich Gassmann | Device for the construction of piles or foundation piles |
US3875751A (en) * | 1967-06-14 | 1975-04-08 | Kjeld F W Paus | Strengthening cohesive soils |
-
1988
- 1988-11-30 NL NL8802944A patent/NL8802944A/en not_active Application Discontinuation
-
1989
- 1989-11-13 ES ES198989202872T patent/ES2029924T3/en not_active Expired - Lifetime
- 1989-11-13 AT AT89202872T patent/ATE73513T1/en not_active IP Right Cessation
- 1989-11-13 EP EP89202872A patent/EP0371533B1/en not_active Expired - Lifetime
- 1989-11-13 DE DE8989202872T patent/DE68900977D1/en not_active Expired - Fee Related
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR438488A (en) * | 1911-12-06 | 1912-05-18 | Heinrich Gassmann | Device for the construction of piles or foundation piles |
US3875751A (en) * | 1967-06-14 | 1975-04-08 | Kjeld F W Paus | Strengthening cohesive soils |
Non-Patent Citations (1)
Title |
---|
PATENT ABSTRACTS OF JAPAN, vol. 7, no. 98 (M-210)[1243], 26th April 1983, page 52 M 210; & JP-A-58 20 819 (ENU AI TEI K.K.) 07-02-1983 * |
Cited By (24)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19616593A1 (en) * | 1996-04-25 | 1997-11-06 | Bauer Spezialtiefbau | Device for closing and opening of concrete opening of continuous screw |
DE19616593C2 (en) * | 1996-04-25 | 1998-07-02 | Bauer Spezialtiefbau | Concrete protection for endless screws |
WO2000040808A1 (en) * | 1999-01-07 | 2000-07-13 | Menard Soltraitement | Method and device for forming a foundation pipe pile in the ground |
WO2000050358A1 (en) * | 1999-02-25 | 2000-08-31 | Menard Soltraitement | Concrete comprising an elastic substance and pile made of such a concrete |
US6824331B2 (en) * | 2000-04-10 | 2004-11-30 | Clifford Alan Parker | Screw form anchor device |
NL1025689C2 (en) * | 2004-03-10 | 2005-09-20 | Konink Bam Groep Nv | Borehole tube for sinking foundation piles, has closed bottom end with convex shape |
NL1027112C2 (en) | 2004-09-24 | 2006-03-27 | Ecodrie B V | Earth auger useful for fabricating foundation piles comprises a cylindrical drill body with a drill tip whose outer surface is indented with respect to the drill body |
GB2424430A (en) * | 2005-03-22 | 2006-09-27 | Roxbury Ltd | Method of introducing ground loops or pile reinforcing bars into the ground |
GB2424430B (en) * | 2005-03-22 | 2010-11-03 | Roxbury Ltd | Method and apparatus for introducing elongate members into the ground |
EP1726718A1 (en) * | 2005-05-20 | 2006-11-29 | SOILMEC S.p.A. | Bit for excavation and compaction equipment for erecting piles, and excavation equipment provided with said bit |
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 |
EP1734222A1 (en) * | 2005-06-14 | 2006-12-20 | BAUER Maschinen GmbH | System for making concrete piles in a ground and drilling- tool therefor |
NL1029541C2 (en) * | 2005-07-15 | 2007-01-16 | Ecodrie B V | Screw injection drill is used for production of foundation column and comprises shaft provided with at least one injection aperture and screw blade |
ITTO20090310A1 (en) * | 2009-04-20 | 2010-10-21 | Soilmec Spa | EXCAVATION AND CONSTIPATION EQUIPMENT FOR CONSTRUCTION OF SCREW POLES. |
EP2246478A1 (en) * | 2009-04-20 | 2010-11-03 | Soilmec S.p.A. | Device for the construction of piles. |
NL2005298C2 (en) * | 2010-09-01 | 2012-03-05 | Jan Vos | COMPOSITION OF TUBE AND DRILL HEAD AND METHOD FOR FORMING A BODY OF MATERIAL IN A BOTTOM. |
NL2009919C2 (en) * | 2012-11-30 | 2014-06-04 | Digi Exchange V O F | INJECTION DRILL FOR MANUFACTURING A CONSTRUCTION ELEMENT IN A BOTTOM. |
US9217293B1 (en) | 2014-10-17 | 2015-12-22 | Berkel & Company Contractors, Inc. | Reversible displacement auger tool |
US9506295B1 (en) | 2014-10-17 | 2016-11-29 | Berkel & Company Contractors, Inc. | Reversible displacement auger tool |
US9512588B2 (en) | 2014-10-17 | 2016-12-06 | Berkel & Company Contractors, Inc. | Reversible displacement auger tool |
EP3299520A2 (en) | 2016-09-27 | 2018-03-28 | Kroeze Holding B.V. | Stabilization of dikes |
NL2018306B1 (en) * | 2017-02-03 | 2018-08-28 | European Found Group B V | Auger and method for manufacturing drill piles |
NL2018390B1 (en) * | 2017-02-17 | 2018-09-17 | European Found Group B V | Auger and method for manufacturing a drill pile |
CN107386282A (en) * | 2017-07-20 | 2017-11-24 | 重庆交通大学 | A kind of embedded rock pile shape of threads steel pile casting crept into and its application method |
Also Published As
Publication number | Publication date |
---|---|
DE68900977D1 (en) | 1992-04-16 |
ES2029924T3 (en) | 1992-10-01 |
NL8802944A (en) | 1990-06-18 |
ATE73513T1 (en) | 1992-03-15 |
EP0371533B1 (en) | 1992-03-11 |
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Legal Events
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---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
17P | Request for examination filed |
Effective date: 19900328 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT BE CH DE ES FR GB GR IT LI LU NL SE |
|
17Q | First examination report despatched |
Effective date: 19910719 |
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