EP1519000A1 - Displacement drilling tool and method of use - Google Patents
Displacement drilling tool and method of use Download PDFInfo
- Publication number
- EP1519000A1 EP1519000A1 EP04020562A EP04020562A EP1519000A1 EP 1519000 A1 EP1519000 A1 EP 1519000A1 EP 04020562 A EP04020562 A EP 04020562A EP 04020562 A EP04020562 A EP 04020562A EP 1519000 A1 EP1519000 A1 EP 1519000A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- drill string
- displacer
- drilling tool
- head
- ground
- 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
- 238000005553 drilling Methods 0.000 title claims abstract description 28
- 238000006073 displacement reaction Methods 0.000 title claims description 28
- 238000000034 method Methods 0.000 title claims description 15
- 239000002689 soil Substances 0.000 claims abstract description 19
- 239000000463 material Substances 0.000 claims description 20
- 230000003014 reinforcing effect Effects 0.000 claims description 3
- 230000003213 activating effect Effects 0.000 claims description 2
- 230000000694 effects Effects 0.000 description 6
- 238000005056 compaction Methods 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000009499 grossing Methods 0.000 description 2
- 230000000087 stabilizing effect Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000007596 consolidation process Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Images
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
- E02D5/72—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
- E21B10/44—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
Definitions
- the invention relates firstly to a drilling tool for displacement drilling in the ground, with a drill string, at the bottom End of a displacer head is releasably attached.
- the invention a method for displacement drilling in Floor, in which a displacer, which at a lower End of a drill string is releasably secured, under displacement from soil material in the ground to a designated Depth is introduced, in which the drill string from the displacer head is released and withdrawn from the ground.
- Such a method is also called positive displacement drilling lost displacer known.
- the displacer remains doing so in the ground and forms the footprint for a above it produced concrete or stabilizing column. For this is generated after retraction of the drill string in the Drilling hole concrete or other contents introduced.
- the problem is that at certain soil conditions no stable borehole wall is produced. That is, soil material can be filled before filling of the borehole produced from the borehole wall down fall. This soil material is present in the concrete or stabilizing column defects that the Detriment to the carrying capacity of the column produced.
- the invention has for its object to provide a drilling tool and a method for positive displacement drilling in the ground, with which holes can be produced with a particularly stable borehole.
- the drilling tool according to the invention is characterized that the lower end of the drill string as a displacement area is formed, which opposite to the adjacent Bohrstrang Scheme is widened. After loosening the displacer head can thus trained at the lower end of the drill string expanded displacement area again for smoothing contribute to the borehole wall when retracting the drill string.
- the displacer from above displaced soil material displaced into the borehole wall become. This prevents on the one hand prevents unwanted Soil in the cavity of the borehole to be filled accumulates. On the other hand, this leads to additional displacement of soil material in the borehole wall during retraction of the drill string for additional compaction and consolidation and thus stabilization of the borehole wall.
- the displacer area can basically have different shapes, about a purely conical or a spherical shape, have. According to the invention however, it is preferred that the displacement area a cylindrical segment which gradually, especially conical, in the adjacent drill string area passes. A cylindrical segment can be manufactured realize particularly cost-effective. In addition, over the entire length of the cylinder segment a uniform displacement effect achieved. In addition to a purely conical shape of the Transition area to the displacement area can also be another continuous curved course, such as arcuate or quarter-circular, be provided.
- the displacer head has an outer spiral.
- the displacer head can thereby be screwed into the ground, which a particularly good displacement effect can be achieved.
- the displacer head can be made not only of steel but also of Plastic, fiber concrete or other suitable material be.
- the displacement area on the drill string has an outer diameter, which equal to or smaller than the outside diameter of the outside spiral of the displacer head is.
- the outer diameter of the displacer area by up to 10 to 20% less than the outer diameter of the outer spiral.
- a further improvement of the compression effect is achieved according to the invention achieved in that at the drill string area, which adjoins the displacer area, a Bohrstrangchtl is trained. Through this drill string spiral can of above falling material at a corresponding rotational movement the drill string targeted promoted in the displacement become.
- the drill string helix opposite to the outer spiral of the displacer head is winding. In this way, at an opposite Rotation of the drill string when retracting the penetration process, the desired conveying effect to the displacement be achieved.
- the drill string for introducing a filling is tubular.
- the contents can through the inner cavity already during retraction of the drill string be filled so that thereby a support of the Borehole wall is reached.
- the method according to the invention is characterized that at the lower end of the drill string a displacement area is formed, with which when retracting the drill string From above coming drilling material is displaced laterally.
- the Displacer To produce the borehole, it is preferred that on the Displacer an outer spiral is formed, wherein the Drill strand turned in one direction when placed in the ground becomes, in which the outside spiral soil material laterally and promotes upwards.
- the displacer thus fulfills the significant compaction effect when screwed into the ground.
- a preferred embodiment of the invention is that the displacer head by turning in opposite direction and / or by activating a release device from the drill string is solved.
- a simple Screw connection between the displacer head and the drill string consist.
- it can also be another connection device, such as a bayonet lock or a release device with a mechanical or electrical adjustment Block element consist, which is a reliable release of the Displacer head allowed by the drill string.
- An additional compression is characterized according to the invention achieved that at the Bohrstrang Symposium, which at the Verdränger Symposium adjacent, a Bohrstrangplanetaryl formed is, wherein when retracting the drill string in one direction is rotated, in which the Bohrstrangplanetaryl come from above promotes the soil material in the displacement area. in this connection can come from above of the soil material also in a relative narrow gap between the displacer area and the borehole wall be pressed.
- the generated wellbore be retracted of the drill string is filled with a filling material. In this way, the borehole wall at any time by the Drilling tool or the product itself reliably supported.
- the single drawing shows a side view of an inventive Drilling tool 10.
- the drilling tool 10 has a conical for positive displacement drilling Displacer 40, on the outside of an outer coil 42 is formed.
- a conical for positive displacement drilling Displacer 40 On the outside of an outer coil 42 is formed.
- peg-shaped Carrier 44 is formed, which in corresponding recesses 34 engage the lower end of the drill string 20.
- the tubular drill string 20 has at its lower End of a widened displacement area 30, which via a cone 32 in an adjacent drill string area 22 having a substantially constant outer diameter passes.
- a Bohrstranglingerl 24 formed whose maximum outer diameter about the outer diameter of the widened cylindrical trained displacer 30 corresponds.
- the Bohrstrangchtl 24 extends to the cylindrical Range of the displacer 30 and runs in the section of the cone 32 gradually.
- the displacer head 40 in its upper region a base cylinder 46 with a Outer diameter, which corresponds to the outer diameter of the displacement 30 corresponds.
- the opposite projecting Outer spirals 42 of the displacer 40 produce during displacement drilling a fault zone in the borehole wall.
- the drill string 20 After loosening from the displacer 40 at a designated final depth of Drill hole is the drill string 20 with opposite rotation slowly pulled out of the hole.
- Soil material from the fault zone of the borehole wall is about the drill string helix 24 down to the displacer 30th promoted. Due to the outside diameter of the displacer area 30, the soil material in the borehole wall, in particular into the fault zone of the borehole wall, displaced.
- the borehole wall is smoothed and in addition compacted. At the same time it prevents soil material accumulates on the lost displacer 40 and flaws forms in a concrete column to be produced.
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Structural Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Physics & Mathematics (AREA)
- Geochemistry & Mineralogy (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Earth Drilling (AREA)
- Piles And Underground Anchors (AREA)
- Soil Working Implements (AREA)
- Drilling And Boring (AREA)
Abstract
Description
Die Erfindung betrifft zum einen ein Bohrwerkzeug zum Verdrängungsbohren im Boden, mit einem Bohrstrang, an dessen unterem Ende ein Verdrängerkopf lösbar befestigt ist. Zum anderen betrifft die Erfindung ein Verfahren zum Verdrängungsbohren im Boden, bei dem ein Verdrängerkopf, welcher an einem unteren Ende eines Bohrstranges lösbar befestigt ist, unter Verdrängung von Bodenmaterial in den Boden bis zu einer vorgesehenen Tiefe eingebracht wird, in welcher der Bohrstrang vom Verdrängerkopf gelöst und aus dem Boden zurückgezogen wird.The invention relates firstly to a drilling tool for displacement drilling in the ground, with a drill string, at the bottom End of a displacer head is releasably attached. On the other hand the invention a method for displacement drilling in Floor, in which a displacer, which at a lower End of a drill string is releasably secured, under displacement from soil material in the ground to a designated Depth is introduced, in which the drill string from the displacer head is released and withdrawn from the ground.
Ein derartiges Verfahren ist auch als Verdrängungsbohren mit verlorenem Verdrängerkopf bekannt. Der Verdrängerkopf verbleibt dabei im Boden und bildet die Aufstandsfläche für eine darüber hergestellte Beton- oder Stabilisierungssäule. Hierzu wird nach dem Zurückziehen des Bohrstranges in das erzeugte Bohrloch Beton oder ein anderes Füllgut eingeleitet.Such a method is also called positive displacement drilling lost displacer known. The displacer remains doing so in the ground and forms the footprint for a above it produced concrete or stabilizing column. For this is generated after retraction of the drill string in the Drilling hole concrete or other contents introduced.
Bei diesem bekannten Verfahren besteht das Problem, dass bei bestimmten Bodenverhältnissen keine stabile Bohrlochwandung erzeugt wird. Das heißt, Bodenmaterial kann vor dem Befüllen des erzeugten Bohrloches von der Bohrlochwandung nach unten fallen. Dieses Bodenmaterial stellt in der zu erzeugenden Beton- oder Stabilisierungssäule Fehlstellen dar, welche die Tragfähigkeit der erzeugten Säule beeinträchtigen.In this known method, the problem is that at certain soil conditions no stable borehole wall is produced. That is, soil material can be filled before filling of the borehole produced from the borehole wall down fall. This soil material is present in the concrete or stabilizing column defects that the Detriment to the carrying capacity of the column produced.
Der Erfindung liegt die Aufgabe zugrunde, ein Bohrwerkzeug und ein Verfahren zum Verdrängungsbohren im Boden anzugeben, mit welchen Bohrlöcher mit einer besonders stabilen Bohrlochwandung erzeugt werden können. The invention has for its object to provide a drilling tool and a method for positive displacement drilling in the ground, with which holes can be produced with a particularly stable borehole.
Die Aufgabe wird erfindungsgemäß zum einen durch ein Bohrwerkzeug mit den Merkmalen des Anspruchs 1 und zum anderen mit einem Verfahren mit den Merkmalen des Anspruchs 9 gelöst. Bevorzugte Ausführungsformen der Erfindung sind in den jeweiligen abhängigen Ansprüchen angegeben.The object is achieved on the one hand by a drilling tool with the features of claim 1 and the other with a Method solved with the features of claim 9. preferred Embodiments of the invention are in the respective specified dependent claims.
Das erfindungsgemäße Bohrwerkzeug ist dadurch gekennzeichnet, dass das untere Ende des Bohrstranges als ein Verdrängerbereich ausgebildet ist, welcher gegenüber dem angrenzenden Bohrstrangbereich aufweitet ist. Nach dem Lösen des Verdrängerkopfes kann somit der am unteren Ende des Bohrstranges ausgebildete aufgeweitete Verdrängerbereich nochmals zur Glättung der Bohrlochwandung beim Zurückziehen des Bohrstranges beitragen. Insbesondere kann durch den Verdrängerbereich von oben nachfallendes Bodenmaterial in die Bohrlochwandung verdrängt werden. Hierdurch wird einerseits verhindert, dass sich unerwünschtes Bodenmaterial im zu verfüllenden Hohlraum des Bohrloches ansammelt. Andererseits führt das zusätzliche Verdrängen von Bodenmaterial in die Bohrlochwandung beim Zurückziehen des Bohrstranges zu einer zusätzlichen Verdichtung und Verfestigung und damit Stabilisierung der Bohrlochwandung.The drilling tool according to the invention is characterized that the lower end of the drill string as a displacement area is formed, which opposite to the adjacent Bohrstrangbereich is widened. After loosening the displacer head can thus trained at the lower end of the drill string expanded displacement area again for smoothing contribute to the borehole wall when retracting the drill string. In particular, by the displacer from above displaced soil material displaced into the borehole wall become. This prevents on the one hand prevents unwanted Soil in the cavity of the borehole to be filled accumulates. On the other hand, this leads to additional displacement of soil material in the borehole wall during retraction of the drill string for additional compaction and consolidation and thus stabilization of the borehole wall.
Der Verdrängerbereich kann grundsätzlich verschiedene Formen, etwa eine rein konische oder eine ballige Form, aufweisen. Erfindungsgemäß ist es jedoch bevorzugt, dass der Verdrängerbereich ein zylindrisches Segment aufweist, welches allmählich, insbesondere konisch, in den angrenzenden Bohrstrangbereich übergeht. Ein zylindrisches Segment lässt sich fertigungstechnisch besonders kostengünstig verwirklichen. Zudem wird über die gesamte Länge des Zylindersegmentes eine gleichmäßige Verdrängungswirkung erzielt. Neben einer rein konischen Form des Übergangsbereiches zum Verdrängerbereich kann auch ein anderer stetiger kurvenförmiger Verlauf, etwa bogenförmig oder viertelkreisförmig, vorgesehen sein.The displacer area can basically have different shapes, about a purely conical or a spherical shape, have. According to the invention However, it is preferred that the displacement area a cylindrical segment which gradually, especially conical, in the adjacent drill string area passes. A cylindrical segment can be manufactured realize particularly cost-effective. In addition, over the entire length of the cylinder segment a uniform displacement effect achieved. In addition to a purely conical shape of the Transition area to the displacement area can also be another continuous curved course, such as arcuate or quarter-circular, be provided.
Für eine gute Verdrängerwirkung ist es erfindungsgemäß, dass der Verdrängerkopf eine Außenwendel aufweist. Der Verdrängerkopf kann hierdurch in den Boden eingeschraubt werden, wodurch sich eine besonders gute Verdrängungswirkung erzielen lässt. Der Verdrängerkopf kann nicht nur aus Stahl sondern auch aus Kunststoff, Faserbeton oder einem anderen geeigneten Material sein.For a good Verdrängerwirkung it is according to the invention that the displacer head has an outer spiral. The displacer head can thereby be screwed into the ground, which a particularly good displacement effect can be achieved. The displacer head can be made not only of steel but also of Plastic, fiber concrete or other suitable material be.
Nach der Erfindung ist es von Vorteil, das der Verdrängerbereich am Bohrstrang einen Außendurchmesser aufweist, welcher gleich oder kleiner als der Außendurchmesser der Außenwendel des Verdrängerkopfes ist. Vorzugsweise ist der Außendurchmesser des Verdrängerbereiches um bis zu 10 bis 20 % kleiner als der Außendurchmesser der Außenwendel. Auch bei diesem Untermaß wird eine gute Glättung und Verdichtung der Bohrlochwandung erzeugt, welche aufgrund der Einschraubbewegung des Verdrängerkopfes Ungleichmäßigkeiten aufweist. Eine besonders gute Verdichtungswirkung wird erfindungsgemäß dadurch erzielt, dass der Außendurchmesser des Verdrängerbereiches etwa dem Außendurchmesser der Außenwendel des Verdrängerkopfes entspricht.According to the invention, it is advantageous that the displacement area on the drill string has an outer diameter, which equal to or smaller than the outside diameter of the outside spiral of the displacer head is. Preferably, the outer diameter of the displacer area by up to 10 to 20% less than the outer diameter of the outer spiral. Even with this undersize will be a good smoothing and compaction of the borehole wall generated, which due to the screwing of the displacer head Has irregularities. A particularly good one Compaction effect is achieved according to the invention in that the outer diameter of the displacer area approximately the outer diameter the outer spiral of the displacer corresponds.
Eine weitere Verbesserung der Verdichtungswirkung wird erfindungsgemäß dadurch erreicht, dass an dem Bohrstrangbereich, welcher an den Verdrängerbereich angrenzt, eine Bohrstrangwendel ausgebildet ist. Durch diese Bohrstrangwendel kann von oben nachfallendes Material bei einer entsprechenden Drehbewegung des Bohrstranges gezielt in den Verdrängerbereich gefördert werden.A further improvement of the compression effect is achieved according to the invention achieved in that at the drill string area, which adjoins the displacer area, a Bohrstrangwendel is trained. Through this drill string spiral can of above falling material at a corresponding rotational movement the drill string targeted promoted in the displacement become.
Weiter ist es nach der Erfindung bevorzugt, dass die Bohrstrangwendel entgegengesetzt zur Außenwendel des Verdrängerkopfes gewunden ist. Auf diese Weise kann bei einer entgegengesetzten Drehung des Bohrstranges beim Zurückziehen gegenüber dem Eindringvorgang die gewünschte Förderwirkung zum Verdrängerbereich erzielt werden.Further, it is preferred according to the invention that the drill string helix opposite to the outer spiral of the displacer head is winding. In this way, at an opposite Rotation of the drill string when retracting the penetration process, the desired conveying effect to the displacement be achieved.
Zur Erzeugung besonders stabiler Gründungssäulen im Boden ist es erfindungsgemäß, dass an dem Verdrängerkopf Armierungselemente befestigbar sind. Dies können Stahlseile oder Metallstangen sein, welche beispielsweise in einer Betonsäule eine Armierung darstellen.To produce particularly stable foundation columns in the ground according to the invention, that at the displacer reinforcing elements are fastened. These can be steel cables or metal bars which, for example, in a concrete column a Represent reinforcement.
Zum Verfüllen des erzeugten Bohrloches ist es nach der Erfindung vorgesehen, dass der Bohrstrang zum Einleiten eines Füllgutes rohrförmig ausgebildet ist. Somit kann das Füllgut durch den inneren Hohlraum bereits beim Zurückziehen des Bohrstranges eingefüllt werden, so dass hierdurch eine Abstützung der Bohrlochwandung erreicht wird.To fill the borehole produced it is according to the invention provided that the drill string for introducing a filling is tubular. Thus, the contents can through the inner cavity already during retraction of the drill string be filled so that thereby a support of the Borehole wall is reached.
Das erfindungsgemäße Verfahren ist dadurch gekennzeichnet, dass am unteren Ende des Bohrstranges ein Verdrängerbereich ausgebildet ist, mit welchem beim Zurückziehen des Bohrstranges von oben kommendes Bohrmaterial seitlich verdrängt wird. Mit diesem Verfahren lassen sich die vorbeschriebenen Vorteile einer stabilen Bohrlochwandung erreichen.The method according to the invention is characterized that at the lower end of the drill string a displacement area is formed, with which when retracting the drill string From above coming drilling material is displaced laterally. With this method, the advantages described above can be reach a stable borehole wall.
Zur Erzeugung des Bohrloches ist es bevorzugt, dass an dem Verdrängerkopf eine Außenwendel ausgebildet ist, wobei der Bohrstrang beim Einbringen in den Boden in eine Richtung gedreht wird, in welcher die Außenwendel Bodenmaterial seitlich und nach oben fördert. Der Verdrängerkopf erfüllt somit die wesentliche Verdichtungswirkung beim Eindrehen in den Boden.To produce the borehole, it is preferred that on the Displacer an outer spiral is formed, wherein the Drill strand turned in one direction when placed in the ground becomes, in which the outside spiral soil material laterally and promotes upwards. The displacer thus fulfills the significant compaction effect when screwed into the ground.
Eine bevorzugte Weiterbildung der Erfindung besteht darin, dass der Verdrängerkopf durch Drehen in entgegengesetzte Richtung und/oder durch Aktivieren einer Löseeinrichtung vom Bohrstrang gelöst wird. Im ersteren Fall kann eine einfache Schraubverbindung zwischen dem Verdrängerkopf und dem Bohrstrang bestehen. Es kann jedoch auch eine andere Verbindungseinrichtung, etwa ein Bajonettverschluss oder eine Löseeinrichtung mit einem mechanisch oder elektrisch zu verstellenden Sperrelement bestehen, welches ein zuverlässiges Lösen des Verdrängerkopfes vom Bohrstrang erlaubt.A preferred embodiment of the invention is that the displacer head by turning in opposite direction and / or by activating a release device from the drill string is solved. In the former case, a simple Screw connection between the displacer head and the drill string consist. However, it can also be another connection device, such as a bayonet lock or a release device with a mechanical or electrical adjustment Block element consist, which is a reliable release of the Displacer head allowed by the drill string.
Eine zusätzliche Verdichtung wird nach der Erfindung dadurch erreicht, dass an dem Bohrstrangbereich, welcher an den Verdrängerbereich angrenzt, eine Bohrstrangwendel ausgebildet ist, wobei beim Zurückziehen der Bohrstrang in eine Richtung gedreht wird, in welcher die Bohrstrangwendel von oben kommen des Bodenmaterial in den Verdrängerbereich fördert. Hierbei kann von oben kommen des Bodenmaterial auch in einen relativ engen Spalt zwischen den Verdrängerbereich und der Bohrlochwandung gepresst werden.An additional compression is characterized according to the invention achieved that at the Bohrstrangbereich, which at the Verdrängerbereich adjacent, a Bohrstrangwendel formed is, wherein when retracting the drill string in one direction is rotated, in which the Bohrstrangwendel come from above promotes the soil material in the displacement area. in this connection can come from above of the soil material also in a relative narrow gap between the displacer area and the borehole wall be pressed.
Zur Herstellung armierter Säulen im Boden ist es erfindungsgemäß, dass beim Zurückziehen Armierungselemente, welche am Verdrängerkopf befestigt sind, mit nach oben geführt werden.For producing reinforced columns in the soil, it is according to the invention that upon retraction reinforcing elements, which on Displacer are attached, are led upwards.
Weiter ist es bevorzugt, dass das erzeugte Bohrloch beim Zurückziehen des Bohrstranges mit einem Füllgut verfüllt wird. Auf diese Weise wird die Bohrlochwandung jederzeit durch das Bohrwerkzeug oder das Füllgut selbst zuverlässig abgestützt.Further, it is preferred that the generated wellbore be retracted of the drill string is filled with a filling material. In this way, the borehole wall at any time by the Drilling tool or the product itself reliably supported.
Die Erfindung wird nachfolgend anhand eines bevorzugten Ausführungsbeispiels näher erläutert, welches schematisch in der beigefügten Zeichnung dargestellt ist.The invention will be described below with reference to a preferred embodiment explained in more detail, which schematically in the attached drawing is shown.
Die einzige Zeichnung zeigt eine Seitenansicht eines erfindungsgemäßen
Bohrwerkzeuges 10.The single drawing shows a side view of an
Das Bohrwerkzeug 10 weist zum Verdrängungsbohren einen konischen
Verdrängerkopf 40 auf, an dessen Außenseite eine Außenwendel
42 ausgebildet ist. Zum Verbinden mit einem Bohrstrang
20 sind an der Oberseite des Verdrängerkopfes 40 zapfenförmige
Mitnehmer 44 ausgebildet, welche in entsprechende Ausnehmungen
34 am unteren Ende des Bohrstranges 20 eingreifen.The
Der rohrförmig ausgebildete Bohrstrang 20 weist an seinem unteren
Ende einen aufgeweiteten Verdrängerbereich 30 auf, welcher
über einen Konus 32 in einen angrenzenden Bohrstrangbereich
22 mit einem im Wesentlichen konstanten Außendurchmesser
übergeht. Am Außenumfang des Bohrstrangbereiches 22 ist eine
Bohrstrangwendel 24 ausgebildet, deren maximaler Außendurchmesser
etwa dem Außendurchmesser des aufgeweiteten zylindrisch
ausgebildeten Verdrängerbereiches 30 entspricht. Die
Bohrstrangwendel 24 erstreckt sich bis zu dem zylindrischen
Bereich des Verdrängerkopfes 30 und läuft im Abschnitt des Konus
32 allmählich aus.The
Bei der dargestellten Ausführungsform weist der Verdrängerkopf
40 in seinem oberen Bereich einen Grundzylinder 46 mit einem
Außendurchmesser auf, welcher dem Außendurchmesser des Verdrängerbereichs
30 entspricht. Die demgegenüber vorstehenden
Außenwendeln 42 des Verdrängerkopfes 40 erzeugen beim Verdrängungsbohren
eine Störzone in der Bohrlochwandung. Nach dem Lösen
vom Verdrängerkopf 40 bei einer vorgesehenen Endtiefe des
Bohrloches wird der Bohrstrang 20 bei entgegengesetzter Drehung
langsam aus dem Bohrloch gezogen. Von oben nachfallendes
Bodenmaterial aus der Störzone der Bohrlochwandung wird über
die Bohrstrangwendel 24 nach unten zum Verdrängerbereich 30
gefördert. Aufgrund des Außendurchmessers des Verdrängerbereichs
30 wird das Bodenmaterial in die Bohrlochwandung, insbesondere
in die Störzone der Bohrlochwandung, verdrängt.
Hierdurch wird die Bohrlochwandung geglättet und zusätzlich
verdichtet. Gleichzeitig wird verhindert, dass Bodenmaterial
sich auf dem verlorenen Verdrängerkopf 40 ansammelt und Fehlstellen
in einer zu erzeugenden Betonsäule bildet.In the illustrated embodiment, the
Claims (14)
dadurch gekennzeichnet, dass das untere Ende des Bohrstranges (20) als ein Verdrängerbereich (30) ausgebildet ist, welcher gegenüber dem angrenzenden Bohrstrangbereich (22) aufgeweitet ist.Drilling tool for positive displacement drilling in the ground, comprising a drill string (20) at the lower end of which a displacer head (40) is detachably fastened,
characterized in that the lower end of the drill string (20) is formed as a displacer portion (30) which is flared over the adjacent drill string portion (22).
dadurch gekennzeichnet, dass der Verdrängerbereich (30) ein zylindrisches Segment aufweist, welches allmählich, insbesondere konisch, in den angrenzenden Bohrstrangbereich (22) übergeht.Drilling tool according to claim 1,
characterized in that the displacer section (30) comprises a cylindrical segment which gradually, in particular conically, merges into the adjacent drill string section (22).
dadurch gekennzeichnet, dass der Verdrängerkopf (40) eine Außenwendel (42) aufweist.Drilling tool according to claim 1 or 2,
characterized in that the displacer head (40) has an outer coil (42).
dadurch gekennzeichnet, dass der Verdrängerbereich (30) am Bohrstrang (20) einen Außendurchmesser aufweist, welcher gleich oder kleiner als der Außendurchmesser der Außenwendel (42) des Verdrängerkopfes (40) ist.Drilling tool according to claim 3,
characterized in that the displacer region (30) on the drill string (20) has an outer diameter which is equal to or smaller than the outer diameter of the outer spiral (42) of the displacer head (40).
dadurch gekennzeichnet, dass an dem Bohrstrangbereich (22), welcher an den Verdrängerbereich (30) angrenzt, eine Bohrstrangwendel (24) ausgebildet ist. Drilling tool according to one of claims 1 to 4,
characterized in that a drill string helix (24) is formed on the drill string area (22) which adjoins the displacement area (30).
dadurch gekennzeichnet, dass die Bohrstrangwendel (24) entgegengesetzt zur Außenwendel (42) des Verdrängerkopfes (40) gewunden ist.Drilling tool according to claim 5,
characterized in that the Bohrstrangwendel (24) opposite to the outer spiral (42) of the displacer head (40) is wound.
dadurch gekennzeichnet, dass an dem Verdrängerkopf (40) Armierungselemente befestigbar sind.Drilling tool according to one of claims 1 to 6,
characterized in that reinforcing elements can be fastened to the displacer head (40).
dadurch gekennzeichnet, dass der Bohrstrang (20) zum Einleiten eines Füllgutes rohrförmig ausgebildet ist.Drilling tool according to one of claims 1 to 7,
characterized in that the drill string (20) is tubular for introducing a filling material.
bei dem ein Verdrängerkopf (40), welcher an einem unteren Ende eines Bohrstranges (20) lösbar befestigt ist, unter Verdrängung von Bodenmaterial in den Boden bis zu einer vorgesehenen Tiefe eingebracht wird, in welcher der Bohrstrang (20) vom Verdrängerkopf (40) gelöst und aus dem Boden zurückgezogen wird,
dadurch gekennzeichnet, dass am unteren Ende des Bohrstranges (20) ein Verdrängerbereich (30) ausgebildet ist, mit welchem beim Zurückziehen des Bohrstranges (20) von oben kommendes Bodenmaterial seitlich verdrängt wird.Method for positive displacement drilling in the ground, in particular with a drilling tool (10) according to one of claims 1 to 8,
in which a displacer head (40) releasably attached to a lower end of a drill string (20) is inserted into the ground to displace soil material to a designated depth, wherein the drill string (20) is disengaged from the displacer head (40) and being withdrawn from the ground,
characterized in that at the lower end of the drill string (20) has a displacement area (30) is formed, with which when retracting the drill string (20) from above coming soil material is laterally displaced.
dadurch gekennzeichnet, dass an dem Verdrängerkopf (40) eine Außenwendel (42) ausgebildet ist, wobei der Bohrstrang (20) beim Einbringen in den Boden in eine Richtung gedreht wird, in welcher die Außenwendel (42) Bodenmaterial seitlich und nach oben fördert. Method according to claim 9,
characterized in that on the displacer head (40) an outer coil (42) is formed, wherein the drill string (20) is rotated when introduced into the ground in a direction in which the outer coil (42) promotes soil laterally and upwardly.
dadurch gekennzeichnet, dass der Verdrängerkopf (40) durch Drehen in entgegengesetzte Richtung und/oder durch Aktivieren einer Löseeinrichtung vom Bohrstrang (20) gelöst wird.Method according to claim 10,
characterized in that the displacer head (40) is released from the drill string (20) by rotation in the opposite direction and / or by activating a release device.
dadurch gekennzeichnet, dass an dem Bohrstrangbereich (22), welcher an den Verdrängerbereich (30) angrenzt, eine Bohrstrangwendel (24) ausgebildet ist, wobei beim Zurückziehen der Bohrstrang (20) in eine Richtung gedreht wird, in welcher die Bohrstrangwendel (22) von oben kommendes Bodenmaterial in den Verdrängerbereich (30) fördert.Method according to one of claims 9 to 11,
characterized in that a drill string coil (24) is formed on the drill string portion (22) adjacent to the positive displacement portion (30), wherein upon retraction, the drill string (20) is rotated in a direction in which the drill string coil (22) of above soil material promotes in the displacement area (30).
dadurch gekennzeichnet, dass beim Zurückziehen Armierungselemente, welche am Verdrängerkopf (40) befestigt sind, mit nach oben geführt werden.Method according to one of claims 9 to 12,
characterized in that upon retraction armor elements which are fixed to the displacer head (40) are guided upwards.
dadurch gekennzeichnet, dass das erzeugte Bohrloch beim Zurückziehen des Bohrstranges (20) mit einem Füllgut verfüllt wird.Method according to one of claims 9 to 13,
characterized in that the borehole generated when retracting the drill string (20) is filled with a filling material.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10344353 | 2003-09-24 | ||
DE10344353A DE10344353B4 (en) | 2003-09-24 | 2003-09-24 | Drilling device and method for positive displacement drilling in the ground |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1519000A1 true EP1519000A1 (en) | 2005-03-30 |
EP1519000B1 EP1519000B1 (en) | 2006-05-24 |
Family
ID=34177927
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP04020562A Not-in-force EP1519000B1 (en) | 2003-09-24 | 2004-08-30 | Displacement drilling tool and method of use |
Country Status (7)
Country | Link |
---|---|
EP (1) | EP1519000B1 (en) |
JP (1) | JP4395037B2 (en) |
CN (1) | CN1320250C (en) |
AT (1) | ATE327406T1 (en) |
DE (2) | DE10344353B4 (en) |
RU (1) | RU2292437C2 (en) |
UA (1) | UA75807C2 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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 |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9243452B2 (en) * | 2011-04-22 | 2016-01-26 | Baker Hughes Incorporated | Cutting elements for earth-boring tools, earth-boring tools including such cutting elements, and related methods |
JP5859079B2 (en) * | 2014-09-03 | 2016-02-10 | 有限会社清和実業 | Auger screw |
CN104878746A (en) * | 2015-06-14 | 2015-09-02 | 孔超 | Bidirectional extruding short spiral pile-forming device and pile-forming method |
EP3467205B1 (en) | 2017-10-06 | 2019-12-04 | BAUER Maschinen GmbH | Method for creating a pile in the ground and ground processing device for same |
CN110685589B (en) * | 2019-09-19 | 2020-11-24 | 温州博辉新材料科技有限公司 | Inner wall expands puncher for municipal works of tamping |
Citations (4)
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DE4220976C1 (en) * | 1992-06-26 | 1993-07-15 | Delmag Maschinenfabrik Reinhold Dornfeld Gmbh & Co, 7300 Esslingen, De | |
US5833399A (en) * | 1994-01-06 | 1998-11-10 | Global Innovations, Llc | Apparatus for use in forming piles |
US6033152A (en) * | 1997-04-11 | 2000-03-07 | Berkel & Company Contractors, Inc. | Pile forming apparatus |
FR2826050A1 (en) * | 2001-06-19 | 2002-12-20 | Cie Du Sol | Drilling tool comprises web, ending in point, with standard part and widened part, near point, with first and second truncated portions |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
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BE903965A (en) * | 1985-12-31 | 1986-04-16 | Coelus Gaspar Jozef | DEVICE AND METHOD FOR CARRYING DRILLING PILES. |
DE4107834A1 (en) * | 1991-03-12 | 1992-09-17 | Delmag Maschinenfabrik | Hollow displacement auger - has drive shaft extending longitudinally through its centre, with pointed tip, and has anti-buckling discs fitted at intervals along drive shaft, requiring minimum torque for control |
BE1010638A3 (en) * | 1996-09-20 | 1998-11-03 | Poorteman Frank | Drill for making a pile in the ground and method of making the drill applying. |
-
2003
- 2003-09-24 DE DE10344353A patent/DE10344353B4/en not_active Expired - Fee Related
-
2004
- 2004-08-30 AT AT04020562T patent/ATE327406T1/en not_active IP Right Cessation
- 2004-08-30 DE DE502004000614T patent/DE502004000614D1/en active Active
- 2004-08-30 EP EP04020562A patent/EP1519000B1/en not_active Not-in-force
- 2004-09-07 UA UA20040907328A patent/UA75807C2/en unknown
- 2004-09-20 RU RU2004127846/03A patent/RU2292437C2/en not_active IP Right Cessation
- 2004-09-22 JP JP2004274512A patent/JP4395037B2/en not_active Expired - Fee Related
- 2004-09-24 CN CNB2004100851166A patent/CN1320250C/en not_active Expired - Fee Related
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4220976C1 (en) * | 1992-06-26 | 1993-07-15 | Delmag Maschinenfabrik Reinhold Dornfeld Gmbh & Co, 7300 Esslingen, De | |
US5833399A (en) * | 1994-01-06 | 1998-11-10 | Global Innovations, Llc | Apparatus for use in forming piles |
US6033152A (en) * | 1997-04-11 | 2000-03-07 | Berkel & Company Contractors, Inc. | Pile forming apparatus |
FR2826050A1 (en) * | 2001-06-19 | 2002-12-20 | Cie Du Sol | Drilling tool comprises web, ending in point, with standard part and widened part, near point, with first and second truncated portions |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
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 |
Also Published As
Publication number | Publication date |
---|---|
EP1519000B1 (en) | 2006-05-24 |
DE502004000614D1 (en) | 2006-06-29 |
CN1601044A (en) | 2005-03-30 |
CN1320250C (en) | 2007-06-06 |
DE10344353A1 (en) | 2005-05-19 |
RU2292437C2 (en) | 2007-01-27 |
DE10344353B4 (en) | 2005-10-06 |
JP4395037B2 (en) | 2010-01-06 |
ATE327406T1 (en) | 2006-06-15 |
RU2004127846A (en) | 2006-02-20 |
JP2005098096A (en) | 2005-04-14 |
UA75807C2 (en) | 2006-05-15 |
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