EP1277887B1 - Verdrängerbohrer und Gerät, welches den Bohrer benutzt - Google Patents
Verdrängerbohrer und Gerät, welches den Bohrer benutzt Download PDFInfo
- 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
Links
- 238000005553 drilling Methods 0.000 title claims abstract description 66
- 238000006073 displacement reaction Methods 0.000 title claims description 21
- 239000002689 soil Substances 0.000 claims abstract description 31
- 230000007423 decrease Effects 0.000 claims abstract description 4
- 239000004567 concrete Substances 0.000 claims description 29
- 238000001035 drying Methods 0.000 claims 1
- 238000000034 method Methods 0.000 description 6
- 230000008901 benefit Effects 0.000 description 5
- 230000009471 action Effects 0.000 description 3
- 238000005056 compaction Methods 0.000 description 3
- 244000273618 Sphenoclea zeylanica Species 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000002028 premature Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000004927 clay Substances 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000010006 flight Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000011178 precast concrete Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 239000002699 waste material 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
- 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)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (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)
- 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)
- Ein Bohrgerät (32), um Pfosten in die Erde zu bohren, das einen Vorbau mit einer Spitze umfasst, ein oberes Ende und eine Längsachse (x) zum Verbinden an wenigstens einen drehenden Druckkolbenkanal und einen spiralförmigen Gewindegang, der den Vorbau (18) umgibt, der Gewindegang ist mit Fräsmessern (28) ausgestattet, das Bohrgerät ist dadurch gekennzeichnet, dass der Außendurchmesser des Vorbaus vom oberen Ende zur Spitze hin abnimmt, um die Wandung der Bohrung zu verdichten, die von diesem Gerät gebildet wird, der spiralförmige Gewindegang hat einen im Wesentlichen konstanten Außendurchmesser und die Fräsmesser (28) sind in der Nähe der Spitze an den spiralförmige Gewindegang befestigt, die Fräsmesser (28) ragen außerhalb des spiralförmigen Gewindegangs (20) heraus und verlängern entlang einer Achse in festgelegter Richtung im Wesentlichen senkrecht zur Längsachse zur Erzielung einer spiralförmiger Nut innerhalb der verdichteten Wandung.
- Ein Bohrgerät nach Anspruch 1, dadurch gekennzeichnet, dass der Vorbau (18) einen achsenförmigen Durchgang (14) hat um Beton zu liefern und weiterhin dadurch, dass es eine bewegliche Abdeckung umfasst, eingestellt um die niederen Enden des achsenförmigen Durchgangs zu schließen.
- Ein Bohrgerät nach einem der Anspräche 1 bis 2, dadurch gekennzeichnet, dass der spiralförmige Gewindegang (20) eine Schraubensteigung hat, die im Wesentlichen konstant ist.
- Ein Bohrgerät nach allen vorausgehenden Ansprüchen, dadurch gekennzeichnet, dass der Außendurchmesser des Gewindegangs (20) im Wesentliche gleich groß ist, wie der größte Durchmesser des Kegelvorbaus.
- Ein Bohrgerät nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass es weiterhin mindestens einen Druckkolbenkanal ohne einen Gewindegang (20) umfaßt, der Gewindegang hat im Wesentlichen denselben
- Ein Bohrgerät nach einem der Anspruche 1 bis 5, dadurch gekennzeichnet, dass die Fräsmesser (28) in einem Winkel, der, in Bezug auf das niederste Ende des Gewindegangs, nicht größer als 180 Grad ist, angeordnet sind.
- Ein Gerät um Pfosten in die Erde zu bohren, dadurch gekennzeichnet, dass es- ein Bohrgerät gemäß allen Ansprüche von 1 bis 5- erste Motorenmittel zum Drehen des Bohrgeräts um die Längsachse- zweite Motorenmittel zum vertikalen hoch- und herunterbewegen des Bohrgeräts;- Kontrollmittel um Kontrollsignale an den ersten und zweiten Motorenmitteln zu verwenden, sodass sich das Bohrgerät (32) auch während der Aufwärtsverlagerung mit einer vorherbestimmten Drehgeschwindigkeit im Uhrzeigersinn dreht und dieses Bohrgerät bewegt sich mit einer vorherbestimmten Lineargeschwindigkeit nach oben, wobei die spiralförmig Aussparung, die in der Wandung der Bohrung der Fräsmesser ausgebildet ist, eine vorherbestimmte Schraubensteigung hat,umfasst.
- Ein Gerät nach Anspruch 6, dadurch gekennzeichnet, dass das Bohrgerät weiterhin eine bewegliche Abdeckung umfasst, eingestellt um das niedere Ende des achsenförmigen Durchgangs (14) am Vorbau des Geräts zu schließen und dass es weiterhin Geräte umfasst um an den achsenförmigen Durchgang Beton zu liefern.
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 (de) | 2003-01-22 |
EP1277887A3 EP1277887A3 (de) | 2004-09-08 |
EP1277887B1 true EP1277887B1 (de) | 2008-08-27 |
Family
ID=9918662
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP02291716A Expired - Lifetime EP1277887B1 (de) | 2001-07-17 | 2002-07-09 | Verdrängerbohrer und Gerät, welches den Bohrer benutzt |
Country Status (8)
Country | Link |
---|---|
EP (1) | EP1277887B1 (de) |
AT (1) | ATE406481T1 (de) |
DE (1) | DE60228527D1 (de) |
ES (1) | ES2312534T3 (de) |
GB (1) | GB2377235A (de) |
HK (1) | HK1052537A1 (de) |
PL (1) | PL211015B1 (de) |
PT (1) | PT1277887E (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2246479A1 (de) | 2009-04-21 | 2010-11-03 | Soilmec S.p.A. | Vorrichtung zur Herstellung von Bohrpfählen |
Families Citing this family (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2400869B (en) * | 2003-04-22 | 2006-11-15 | Cie Du Sol | Threading equipment |
WO2004101897A1 (en) * | 2003-05-15 | 2004-11-25 | Pass, Jonathan, Charles | A method of constructing a pile |
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. |
ATE480670T1 (de) * | 2005-07-28 | 2010-09-15 | Soletanche Freyssinet | Bohrschnecke |
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 (de) | 2009-08-28 | 2012-05-16 | BAUER Maschinen GmbH | Bohrgerät und Verfahren zur Bohrpfahlherstellung |
IT1403419B1 (it) * | 2010-12-23 | 2013-10-17 | Soilmec Spa | Metodo ed apparato per la perforazione del terreno. |
US10443318B2 (en) | 2013-12-27 | 2019-10-15 | Halliburton Energy Services, Inc. | Threaded connection with high bend and torque capacities |
CN106457360B (zh) * | 2014-04-10 | 2019-06-04 | 森泰克有限公司 | 土钻和制造方法 |
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 |
HUE049572T2 (hu) | 2017-10-06 | 2020-10-28 | Bauer Maschinen Gmbh | Eljárás egy cölöp készítésére talajban, valamint ehhez való talajmegmunkáló berendezés |
EP3728742B1 (de) * | 2017-12-18 | 2023-06-07 | Nordwind S.r.l. | Verfahren und vorrichtung zur stabilisierung von baugrund |
Family Cites Families (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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 |
WO1994002687A1 (en) * | 1992-07-24 | 1994-02-03 | Wagstaff Piling Pty. Ltd. | Apparatus and method for forming piles |
DE4228580C1 (de) * | 1992-09-01 | 1993-10-28 | Strabag Bau Ag | Erdbohrer zum Herstellen eines Ortbeton-Verdrängungspfahles |
BE1007558A5 (nl) | 1993-10-28 | 1995-08-01 | Hareninvest | Grondverdringingsboorkop voor het vormen van palen in de grond. |
JPH07116707B2 (ja) * | 1993-12-24 | 1995-12-13 | 小井 輝夫 | 基礎地盤の掘孔工法とその装置 |
JP3015935B2 (ja) * | 1996-07-30 | 2000-03-06 | 小井 輝夫 | 基礎地盤の掘孔装置 |
GB9620251D0 (en) * | 1996-09-26 | 1996-11-13 | Cementation Piling & Found | Bearing capacity enhancement for piling applications |
US6033152A (en) * | 1997-04-11 | 2000-03-07 | Berkel & Company Contractors, Inc. | Pile forming apparatus |
GB9719254D0 (en) * | 1997-09-11 | 1997-11-12 | Limited | Earthworking equipment |
-
2001
- 2001-07-17 GB GB0117410A patent/GB2377235A/en not_active Withdrawn
-
2002
- 2002-07-09 ES ES02291716T patent/ES2312534T3/es not_active Expired - Lifetime
- 2002-07-09 AT AT02291716T patent/ATE406481T1/de not_active IP Right Cessation
- 2002-07-09 PT PT02291716T patent/PT1277887E/pt unknown
- 2002-07-09 DE DE60228527T patent/DE60228527D1/de not_active Expired - Lifetime
- 2002-07-09 EP EP02291716A patent/EP1277887B1/de not_active Expired - Lifetime
- 2002-07-16 PL PL355067A patent/PL211015B1/pl unknown
-
2003
- 2003-05-28 HK HK03103794A patent/HK1052537A1/xx not_active IP Right Cessation
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2246479A1 (de) | 2009-04-21 | 2010-11-03 | Soilmec S.p.A. | Vorrichtung zur Herstellung von Bohrpfählen |
Also Published As
Publication number | Publication date |
---|---|
ATE406481T1 (de) | 2008-09-15 |
EP1277887A2 (de) | 2003-01-22 |
EP1277887A3 (de) | 2004-09-08 |
GB0117410D0 (en) | 2001-09-05 |
PL211015B1 (pl) | 2012-03-30 |
ES2312534T3 (es) | 2009-03-01 |
PT1277887E (pt) | 2008-12-03 |
HK1052537A1 (en) | 2003-09-19 |
DE60228527D1 (de) | 2008-10-09 |
PL355067A1 (en) | 2003-01-27 |
GB2377235A (en) | 2003-01-08 |
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