EP0634528A2 - Method for placing a binder suspension - Google Patents
Method for placing a binder suspension Download PDFInfo
- Publication number
- EP0634528A2 EP0634528A2 EP94111057A EP94111057A EP0634528A2 EP 0634528 A2 EP0634528 A2 EP 0634528A2 EP 94111057 A EP94111057 A EP 94111057A EP 94111057 A EP94111057 A EP 94111057A EP 0634528 A2 EP0634528 A2 EP 0634528A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- rod
- compressed air
- linkage
- interior
- binder suspension
- 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
- 239000000725 suspension Substances 0.000 title claims abstract description 35
- 238000000034 method Methods 0.000 title claims abstract description 32
- 239000011230 binding agent Substances 0.000 title claims abstract description 25
- 238000005553 drilling Methods 0.000 claims abstract description 19
- 239000000463 material Substances 0.000 claims abstract description 17
- 238000002347 injection Methods 0.000 claims description 26
- 239000007924 injection Substances 0.000 claims description 26
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 12
- 238000007789 sealing Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 2
- 241000446313 Lamella Species 0.000 claims 1
- 239000002689 soil Substances 0.000 abstract description 10
- 238000003475 lamination Methods 0.000 abstract 1
- 239000003570 air Substances 0.000 description 21
- 230000002349 favourable effect Effects 0.000 description 2
- 230000003466 anti-cipated effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
Images
Classifications
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
- E02D3/12—Consolidating by placing solidifying or pore-filling substances in the soil
-
- 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
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- 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
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- 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
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
- E02D3/12—Consolidating by placing solidifying or pore-filling substances in the soil
- E02D3/126—Consolidating by placing solidifying or pore-filling substances in the soil and mixing by rotating blades
Definitions
- the invention relates to a method for producing solidified or sealing bodies in the ground, in particular in the form of columns or lamellae, in which a drill and injection rod is sunk and pulled again with the application of binder suspension.
- the invention further relates to a drilling and injection rod for performing the method according to the invention.
- Methods of the type described above are carried out with a low injection pressure of approximately 10 bar as a simple injection method and with a high pressure of 200 to 600 bar as a high-pressure injection method; the latter are known by the applicant under the Soilcrete brand name (VDI-Lexikon Bauingenieur Weg, Düsseldorf 1991, p. 270). It is customary here that a smooth, double-walled pipe rod, which is provided with a drill bit, also serves as a drill and injection rod. After the drill pipe has sunk, binder suspension is applied during the drawing process via nozzles in the vicinity of the drill bit, which are supplied via feed channels between the walls of the drill pipe.
- the binder suspension in a high-pressure cutting jet or instead to apply the binder at a relatively low pressure and also to use water in a high-pressure cutting jet.
- the high-pressure cutting jet can be coated with compressed air, a further supply duct for compressed air being formed in the interior of the double walls of the rod assembly.
- lamellar solidified bodies are formed from a mixture of binder suspension and soil material in accordance with the alignment of the nozzles; the injection rod is pulled in a rotating manner, the rotational speed being the pulling speed is to be coordinated, columnar solidified soil bodies are formed from binder suspension mixed with soil material.
- a drilling device for a high-pressure injection method in which a wall-mounted linkage for a high-pressure suspension jet is arranged so as to be longitudinally displaceable in a further double-walled linkage for supplying flushing medium.
- Both rods have their own drill bits.
- This design requires particularly complicated drive means.
- the proposed procedure is extremely complex, with excess suspension flowing back to the surface in the annular space between the two rods. The risk of this annulus becoming blocked is addressed and should not be neglected.
- the present invention is based on the object of providing a method and a device for carrying out the method of the type mentioned at the outset which, even in the presence of heavy soils, permits the drilling and injection method described above to be carried out in one operation.
- the solution consists in a method which is characterized in that the rod is brought down in the auger drilling method and that excess material is discharged through the interior of the drill and injection rod when the rod is pulled and the binder suspension is applied.
- the auger drilling method allows drilling in dense soils in a manner known per se.
- the excess material rising in the borehole when the suspension is brought out, which is considerably impeded by a screw, can flow out through the interior of the rod according to the invention, so that despite the use of the screw drilling method, the injection according to a normal injection method with a pressure of about 10 bar or the injection after the high-pressure injection process with pressures of 200 to 600 bar can be carried out without problems, without the screw of the rod interfering with the return material.
- the method is particularly advantageously carried out in such a way that compressed air is fed to the interior of the rod, so that the dough speed of the material in the interior is increased significantly. This loosens up the return material and prevents clogging of the inside of the boom, even if the soil is firm. It is particularly advantageous if compressed air is supplied to the interior of the boom at different heights.
- a high-pressure injection method can be modified such that the cutting jet used is encased in compressed air by arranging ring nozzles for compressed air concentrically with the cutting jet nozzles.
- the cutting jet can be formed by binder suspension fed under high pressure or by water fed under high pressure, in the latter case the binder suspension being fed again under lower pressure.
- the rod can be pulled non-rotating, whereby part of the task of the cutting jet is anticipated by enlarging the borehole;
- the boom can be pulled in a direction opposite to the direction of rotation when sinking to protect the material against excessive loads.
- a drilling and injection rod suitable for carrying out the above-mentioned method with a double-walled tubular body which forms a central interior and an annular space, which is provided for guiding binder suspension and has at least one nozzle outlet at the lower end of the rod to the environment, is characterized according to the invention from the fact that at least one helical worm gear is attached to the outside of the tubular body and the tubular body has at least one jacket opening at the lower end of the rod connecting the central interior with the surroundings.
- This jacket opening forms a passage channel through the two walls of the tubular body, which is sealed against the annular space, which serves for the supply of binder suspension, water and compressed air.
- the jacket opening can be designed in such a way that the return of material from the environment into the interior and the outflow is promoted; especially when a certain direction of rotation of the linkage is provided when pulling.
- the at least one jacket opening can preferably be covered with a closure flap which can be opened or removed by pressurizing the interior of the tubular body. This effectively prevents the interior of the tubular body from becoming clogged with soil material which is not loosened or suspended by binder suspension when the rod is being sunk.
- a particularly preferred new embodiment is that at least one outlet nozzle for air to the interior of the tubular body is arranged in the linkage, preferably even a plurality of outlet nozzles to the interior are arranged at different heights in order to use the method previously described for loosening the return material in the interior to be able to.
- This outlet nozzle is preferably arranged above the jacket opening.
- either two different compressed air supply lines can be provided in the annular space in order to generate a different pressure level, or - preferably in association with the nozzles - means for reducing the pressure can be provided in front of at least one type of nozzle.
- the outlet nozzles for suspension are arranged below the at least one jacket opening. As a result, the return flow of suspension through the jacket opening when pulling the rod is kept low.
- At least one outlet nozzle for a cutting jet - in particular from water - is arranged above the at least one jacket opening.
- a drilling and injection rod 1 which comprises a double-walled tubular body 2, which forms an annular space 3 and a central interior 4.
- a worm gear 5 shown in view is attached on the outside of the tubular body.
- a jacket opening 6 is provided in the tubular body, which ends with a drill tip 7.
- the annular space 3 is formed into a longitudinal channel 8 for suspension and a longitudinal channel 9 for compressed air.
- Two radial nozzles 10, 11 extend from the longitudinal channel 8 and deliver the suspension, in particular in the high-pressure jet. These nozzles are encased by ring nozzles 12, 13 for compressed air.
- a further nozzle 14 goes from the longitudinal channel 9 for compressed air into the interior 4 for the return material.
- the nozzles 10, 11 are located below the jacket opening 6 in the tubular body, the nozzle 14 above the jacket opening.
- the annular space 3 is divided into a longitudinal channel 8 for suspension, a longitudinal channel 9 for compressed air and a longitudinal channel 15 for cutting water.
- a radial nozzle 16 extends from the longitudinal channel 8 and delivers the suspension.
- a nozzle 17 emerges from the longitudinal channel 15 and delivers cutting water under high pressure. This is through an annular nozzle 18 for Compressed air jacketed.
- a further nozzle 14 leads from the longitudinal channel 9 for compressed air into the interior 4 for the return material.
- the nozzle 16 for suspension is located below the jacket opening 6 in the tubular body, the nozzles 17 and 14 above.
- the linkage according to the invention can be composed of individual longitudinal sections.
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Structural Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Physics & Mathematics (AREA)
- Geochemistry & Mineralogy (AREA)
- Mechanical Engineering (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Agronomy & Crop Science (AREA)
- Soil Sciences (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
- Earth Drilling (AREA)
- Paper (AREA)
- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
- Bulkheads Adapted To Foundation Construction (AREA)
Abstract
Description
Die Erfindung betrifft ein Verfahren zum Herstellen von verfestigten oder abdichtenden Körpern im Boden, insbesondere in Form von Säulen oder Lamellen, bei dem ein Bohr- und Injiziergestänge abgeteuft und unter Ausbringen von Bindemittelsuspension wieder gezogen wird. Die Erfindung betrifft ferner ein Bohr- und Injiziergestänge zur Durchführung des erfindungsgemäßen Verfahrens.The invention relates to a method for producing solidified or sealing bodies in the ground, in particular in the form of columns or lamellae, in which a drill and injection rod is sunk and pulled again with the application of binder suspension. The invention further relates to a drilling and injection rod for performing the method according to the invention.
Verfahren der obenbezeichneten Art werden mit niedrigem Injektionsdruck von etwa 10 bar als einfache Injektionsverfahren und mit einem hohen Druck von 200 bis 600 bar als Hochdruckinjektionsverfahren durchgeführt; letztere sind unter Markennamen Soilcrete der Anmelderin bekannt (VDI-Lexikon Bauingenieurwesen, Düsseldorf 1991, S. 270). Hierbei ist es üblich, daß ein glattes, doppelwandiges Rohrgestänge, das mit einer Bohrkrone versehen ist, gleichzeitig als Bohr- und Injiziergestänge dient. Nach dem Abteufen des Gestänges wird während des Ziehens Bindemittelsuspension über Düsen in Nähe der Bohrkrone ausgebracht, die über Zuführungskanäle zwischen den Wandungen des Gestänges versorgt werden. Hierbei ist es bekannt, die Bindemittelsuspension in einem Hochdruckschneidstrahl auszubringen oder stattdessen das Bindemittel mit relativ niedrigem Druck auszubringen und daneben außerdem Wasser in einem Hochdruckschneidstrahl zu verwenden. Zur Verbesserung der Wirkung kann dabei jeweils der Hochdruckschneidstrahl druckluftummantelt sein, wobei im Inneren der doppelten Wände des Gestänges ein weiterer Zuführungskanal für Druckluft auszubilden ist.Methods of the type described above are carried out with a low injection pressure of approximately 10 bar as a simple injection method and with a high pressure of 200 to 600 bar as a high-pressure injection method; the latter are known by the applicant under the Soilcrete brand name (VDI-Lexikon Bauingenieurwesen, Düsseldorf 1991, p. 270). It is customary here that a smooth, double-walled pipe rod, which is provided with a drill bit, also serves as a drill and injection rod. After the drill pipe has sunk, binder suspension is applied during the drawing process via nozzles in the vicinity of the drill bit, which are supplied via feed channels between the walls of the drill pipe. It is known here to apply the binder suspension in a high-pressure cutting jet or instead to apply the binder at a relatively low pressure and also to use water in a high-pressure cutting jet. In order to improve the effect, the high-pressure cutting jet can be coated with compressed air, a further supply duct for compressed air being formed in the interior of the double walls of the rod assembly.
Wird das Injiziergestänge nicht drehend gezogen, so entstehen entsprechend der Ausrichtung der Düsen lamellenförmig verfestigte Körper aus einem Gemisch aus Bindemittelsuspension und Bodenmaterial; wird das Injiziergestänge drehend gezogen, wobei die Drehgeschwindigkeit auf die Ziehgeschwindigkeit abzustimmen ist, so entstehen säulenförmig verfestigte Bodenkörper aus Bindemittelsuspension durchmischt mit Bodenmaterial.If the injection rod is not pulled in a rotating manner, lamellar solidified bodies are formed from a mixture of binder suspension and soil material in accordance with the alignment of the nozzles; the injection rod is pulled in a rotating manner, the rotational speed being the pulling speed is to be coordinated, columnar solidified soil bodies are formed from binder suspension mixed with soil material.
Bei schweren Böden ist das relativ schlank ausgebildete mehrwandige Gestänge bekannter Art für das Niederbringen der Bohrung nicht brauchbar. Bei Verwendung des Bohr- und Injiziergestänges kann es zu Bohrabweichungen kommen oder zu Beschädigungen des Gestänges. Beides ist nicht akzeptabel. In diesen Fällen war es daher bisher erforderlich, zunächst die Bohrung mit einem schwereren Bohrgestänge niederzubringen, dieses wieder zu ziehen und anschließend das spezielle doppelwandige Injiziergestänge niederzubringen, bei dessen Ziehen dann die Bindemittelsuspension als Niederdruckinjektion alleine oder in Ergänzung zu einem Hochdruckschneidstrahl oder selber als Hochdruckschneistrahl ausgebracht wurde.In the case of heavy soils, the relatively slim, multi-walled linkage of a known type cannot be used for drilling the hole. When using the drilling and injection rod, there may be drilling deviations or damage to the rod. Neither is acceptable. In these cases, it was previously necessary to first drill the hole with a heavier drill pipe, pull it again and then bring down the special double-walled injection pipe, when pulling the binder suspension as a low-pressure injection alone or in addition to a high-pressure cutting jet or even as a high-pressure cutting jet has been.
Die Notwendigkeit zwei verschiedene Gestänge abzuteufen und wieder zu ziehen ist außerordentlich nachteilig und unerwünscht; es muß hierbei berücksichtigt werden, daß bei größerer Tiefe der Bohrungen Gestänge aus mehreren Längsabschnitten verwendet werden, deren Montage und Demontage insbesondere dann zeitraubend ist, wenn es sich um doppel- oder mehrwandige Gestänge handelt.The need to sink and pull two different poles is extremely disadvantageous and undesirable; it must be taken into account here that when the bores are deeper, rods from several longitudinal sections are used, the assembly and disassembly of which is particularly time-consuming if the rods are double or multi-walled.
Aus der DE 37 18 480 C1 ist eine Bohrvorrichtung für ein Hochdruckinjektionsverfahren bekannt, bei dem ein ein wandiges Gestänge für einen Hochdrucksuspensionsstrahl längsverschieblich in einem weiteren doppelwandigen Gestänge zur Zufuhr von Spülmedium angeordnet ist. Beide Gestänge tragen eigene Bohrkronen. Durch diese Ausbildung werden besonders komplizierte Antriebsmittel erforderlich. Die vorgesehene Verfahrensführung ist außerordentlich komplex, wobei im Ringraum zwischen den beiden Gestängen ein Rückfluß von überschüssiger Suspension zur Oberfläche erfolgen soll. Die Gefahr eines Zusetzens dieses Ringraums ist angesprochen und nicht zu vernachlässigen.From DE 37 18 480 C1, a drilling device for a high-pressure injection method is known, in which a wall-mounted linkage for a high-pressure suspension jet is arranged so as to be longitudinally displaceable in a further double-walled linkage for supplying flushing medium. Both rods have their own drill bits. This design requires particularly complicated drive means. The proposed procedure is extremely complex, with excess suspension flowing back to the surface in the annular space between the two rods. The risk of this annulus becoming blocked is addressed and should not be neglected.
Hiervon ausgehend liegt der vorliegenden Erfindung die Aufgabe zugrunde, ein Verfahren und eine Vorrichtung zur Durchführung des Verfahrens der eingangs genannten Art bereitzustellen, das auch bei Vorliegen von schweren Böden die Durchführung des obenbezeichneten Bohr- und Injizierverfahrens in einem Arbeitsgang zuläßt.Proceeding from this, the present invention is based on the object of providing a method and a device for carrying out the method of the type mentioned at the outset which, even in the presence of heavy soils, permits the drilling and injection method described above to be carried out in one operation.
Die Lösung besteht in einem Verfahren, das sich dadurch auszeichnet, daß das Gestänge im Schneckenbohrverfahren niedergebracht wird und daß beim Ziehen des Gestänges und beim Ausbringen der Bindemittelsuspension Überschußmaterial über das Innere des Bohr- und Injiziergestänges abgeführt wird.The solution consists in a method which is characterized in that the rod is brought down in the auger drilling method and that excess material is discharged through the interior of the drill and injection rod when the rod is pulled and the binder suspension is applied.
Mit dem Schneckenbohrverfahren lassen sich in an sich bekannter Weise Bohrungen in dichten Böden niederbringen. Das beim Ausbringen der Suspension im Bohrloch aufsteigende Überschußmaterial, das durch eine Bohrschnecke erheblich behindert wird, kann erfindungsgemäß durch das Innere des Gestänges abfließen, so daß trotz Anwendung des Schneckenbohrverfahrens das Injizieren gemäß einem normalen Injizierverfahren mit einem Druck von etwa 10 bar bzw. das Injizieren nach dem Hochdruckinjizierverfahren mit Drücken von 200 bis 600 bar problemlos durchgeführt werden, ohne daß die Schnecke des Gestänges das Rücklaufmaterial behindert. Dies steigt durch den Innenraum des Gestänges auf, anstatt, wie bei bekannten Injizierverfahren, sich den Weg im Bohrloch außerhalb des Gestänges suchen zu müssen.The auger drilling method allows drilling in dense soils in a manner known per se. The excess material rising in the borehole when the suspension is brought out, which is considerably impeded by a screw, can flow out through the interior of the rod according to the invention, so that despite the use of the screw drilling method, the injection according to a normal injection method with a pressure of about 10 bar or the injection after the high-pressure injection process with pressures of 200 to 600 bar can be carried out without problems, without the screw of the rod interfering with the return material. This rises through the interior of the rod instead of having to find the way in the borehole outside the rod, as in known injection methods.
Besonders vorteilhaft wird das Verfahren in der Weise durchgeführt, daß Druckluft zum Innenraum des Gestänges zugeleitet wird, so daß die teiggeschwindigkeit des Materials im Innenraum wesentlich gesteigert wird. Hierbei wird das Rücklaufmaterial aufgelokkert und selbst bei fester Bodenkonsistenz ein Verstopfen des Inneren des Gestänges vermieden. Besonders vorteilhaft ist es, wenn Druckluft zum Innenraum des Gestänges in verschiedenen Höhen zugeführt wird.The method is particularly advantageously carried out in such a way that compressed air is fed to the interior of the rod, so that the dough speed of the material in the interior is increased significantly. This loosens up the return material and prevents clogging of the inside of the boom, even if the soil is firm. It is particularly advantageous if compressed air is supplied to the interior of the boom at different heights.
Wie als solches bekannt, kann ein Hochdruckinjektionsverfahren derart abgewandelt werden, daß der verwendete Schneidstrahl druckluftummantelt ist, indem Ringdüsen für Druckluft konzentrisch zu den Schneidstrahldüsen angeordnet sind. Hierbei kann der Schneidstrahl durch unter hohem Druck zugeführte Bindemittelsuspension oder durch unter hohem Druck zugeführtes Wasser gebildet werden, wobei im letzteren Fall die Bindemittelsuspension wieder unter geringerem Druck zugeführt wird.As is known as such, a high-pressure injection method can be modified such that the cutting jet used is encased in compressed air by arranging ring nozzles for compressed air concentrically with the cutting jet nozzles. In this case, the cutting jet can be formed by binder suspension fed under high pressure or by water fed under high pressure, in the latter case the binder suspension being fed again under lower pressure.
Der unterschiedlichen Aufgabenstellung entsprechend ist es möglich, die Druckluft zum Inneren des Rohrkörpers auf ein anderes Druckniveau einzustellen als die Druckluft zu den Ringdüsen, die die Schneidstrahlen ummanteln.According to the different tasks, it is possible to adjust the compressed air to a different pressure level to the inside of the tube body than the compressed air to the ring nozzles that surround the cutting jets.
Das Gestänge kann je nach Konsistenz des Bodens nicht-drehend gezogen werden, wobei durch Vergrößerung des Bohrloches ein Teil der Aufgabe des Schneidstrahls vorweggenommen wird; bei besonders festen Böden kann zur Schonung des Materials gegen eine übermäßige Belastung das Gestänge drehend in Gegenrichtung zur Drehrichtung beim Abteufen gezogen werden.Depending on the consistency of the soil, the rod can be pulled non-rotating, whereby part of the task of the cutting jet is anticipated by enlarging the borehole; In the case of particularly solid floors, the boom can be pulled in a direction opposite to the direction of rotation when sinking to protect the material against excessive loads.
Ein zur Durchführung des vorstehend genannten Verfahrens geeignetes Bohr- und Injiziergestänge mit einem doppelwandigen Rohrkörper, der einen zentralen Innenraum und einen Ringraum bildet, der zur Führung von Bindemittelsuspension vorgesehen ist und zumindest einen Düsenaustritt am unteren Ende des Gestänges zur Umgebung hat, zeichnet sich erfindungsgemäß dadurch aus, daß außen am Rohrkörper zumindest ein wendelförmiger Schneckengang angesetzt ist und der Rohrkörper zumindest über eine Mantelöffnung am unteren Ende des Gestänges verfügt, die den zentralen Innenraum mit der Umgebung verbindet. Diese Mantelöffnung bildet dabei einen Durchtrittskanal durch die beiden Wandungen des Rohrkörpers hindurch, der gegen den Ringraum, der zur Zuführung von Bindemittelsuspension, Wasser und Druckluft dient, abgedichtet ist. Die Mantelöffnung kann hierbei in einer Weise ausgebildet sein, daß das Rücklaufen von Material von der Umgebung in den Innenraum und das Abströmen nach oben begünstigt wird; insbesondere, wenn eine bestimmte Drehrichtung des Gestänges beim Ziehen vorgesehen ist.A drilling and injection rod suitable for carrying out the above-mentioned method with a double-walled tubular body which forms a central interior and an annular space, which is provided for guiding binder suspension and has at least one nozzle outlet at the lower end of the rod to the environment, is characterized according to the invention from the fact that at least one helical worm gear is attached to the outside of the tubular body and the tubular body has at least one jacket opening at the lower end of the rod connecting the central interior with the surroundings. This jacket opening forms a passage channel through the two walls of the tubular body, which is sealed against the annular space, which serves for the supply of binder suspension, water and compressed air. The jacket opening can be designed in such a way that the return of material from the environment into the interior and the outflow is promoted; especially when a certain direction of rotation of the linkage is provided when pulling.
In bevorzugter Weise ist hierbei die zumindest eine Mantelöffnung mit einer Verschlußklappe abdeckbar, die durch Druckbeaufschlagung des Innenraums des Rohrkörpers öffenbar oder entfernbar ist. Hiermit wird wirksam verhindert, daß bereits beim Abteufen des Gestänges sich der Innenraum des Rohrkörpers mit Bodenmaterial zusetzt, das nicht durch Bindemittelsuspension aufgelockert oder aufgeschwemmt ist.In this case, the at least one jacket opening can preferably be covered with a closure flap which can be opened or removed by pressurizing the interior of the tubular body. This effectively prevents the interior of the tubular body from becoming clogged with soil material which is not loosened or suspended by binder suspension when the rod is being sunk.
Weitere vorteilhafte Ausgestaltungen des erfindungsgemäßen Gestänges sind in den Unteransprüchen beschrieben, wobei die Art der Aufteilung des Ringraums für die Zuführung von Bindemittelsuspension, Wasser und Luft sowie die Anordnung von Ringdüsen für Druckluft, die die Düsen für die Hochdruckschneidstrahlen ringförmig umgeben, in bekannter konstruktiver Ausführung erfolgen kann. Auf den Inhalt der Unteransprüche wird hiermit bezug genommen.Further advantageous embodiments of the linkage according to the invention are described in the subclaims, the type of division of the annular space for the supply of binder suspension, water and air and the arrangement of annular nozzles for compressed air, which are the nozzles for the high-pressure cutting jets surrounded in a ring, can be done in a known design. Reference is hereby made to the content of the subclaims.
Ein besonders bevorzugte neue Ausgestaltung geht dahin, daß zumindest eine Austrittdüse für Luft zum Innenraum des Rohrkörpers im Gestänge angeordnet ist, vorzugsweise sogar mehrere Austrittsdüsen zum Innenraum in unterschiedlichen Höhen angeordnet sind, um das bereits vorher beschriebene Verfahren zum Auflockern des Rücklaufmaterials im Innenraum zur Anwendung bringen zu können. Diese Austrittsdüse ist vorzugsweise oberhalb der Mantelöffnung angeordnet.A particularly preferred new embodiment is that at least one outlet nozzle for air to the interior of the tubular body is arranged in the linkage, preferably even a plurality of outlet nozzles to the interior are arranged at different heights in order to use the method previously described for loosening the return material in the interior to be able to. This outlet nozzle is preferably arranged above the jacket opening.
Soweit die Zuführung von Druckluft zu Ringdüsen, die die Schneidstrahlen ummanteln, und von Druckluft zum Innenraum des Rohrkörpers zum Auflockern des Rücklaufmaterials zugleich vorgesehen sind, können entweder zwei unterschiedliche Druckluftzuführungen im Ringraum vorgesehen sein, um ein voneinander unterschiedliches Druckniveau zu erzeugen, oder es können - bevorzugt in Zuordnung zu den Düsen - Mittel zur Druckreduzierung vor zumindest einer Art der Düsen vorgesehen sein.If the supply of compressed air to ring nozzles, which surround the cutting jets, and of compressed air to the interior of the tubular body for loosening the return material are provided at the same time, either two different compressed air supply lines can be provided in the annular space in order to generate a different pressure level, or - preferably in association with the nozzles - means for reducing the pressure can be provided in front of at least one type of nozzle.
In bevorzugter Ausgestaltung ist vorgesehen, daß die Austrittsdüsen für Suspension unterhalb der zumindest einen Mantelöffnung angeordnet sind. Hierdurch wird der Rücklauf von Suspension durch die Mantelöffnung beim Ziehen des Gestänges gering gehalten.In a preferred embodiment it is provided that the outlet nozzles for suspension are arranged below the at least one jacket opening. As a result, the return flow of suspension through the jacket opening when pulling the rod is kept low.
In weiterhin günstiger Ausgestaltung ist vorgesehen, daß zumindest eine Austrittsdüse für einen Schneidstrahl - insbesondere aus Wasser - oberhalb der zumindest einen Mantelöffnung angeordnet ist. Hierdurch wird das Rücklaufmaterial in günstiger Weise für den Abfluß über die Mantelöffnung beim Ziehen des Gestänges aufgeschlossen.In a further favorable embodiment it is provided that at least one outlet nozzle for a cutting jet - in particular from water - is arranged above the at least one jacket opening. As a result, the return material is opened up in a favorable manner for the outflow via the jacket opening when the rod is pulled.
Bevorzugte Ausführungsbeispiele des unteren Endes eines erfindungsgemäßen Bohr- und Injiziergestänges sind in den Figuren dargestellt.
- Figur 1
- zeigt einen Längsschnitt durch ein erfindungsgemäßes Gestänge mit einer Ansicht des Schneckenganges in einer ersten Ausführung;
Figur 2- zeigt einen Querschnitt durch ein erfindungsgemäßes Gestänge nach Figur 1;
Figur 3- zeigt einen Längsschnitt durch ein erfindungsgemäßes Gestänge mit einer Ansicht des Schneckenganges in einer zweiten Ausführung;
Figur 4- zeigt einen Querschnitt durch ein erfindungsgemäßes Gestänge nach
Figur 3.
- Figure 1
- shows a longitudinal section through an inventive linkage with a view of the screw flight in a first embodiment;
- Figure 2
- shows a cross section through an inventive linkage according to Figure 1;
- Figure 3
- shows a longitudinal section through a linkage according to the invention with a view of the screw flight in a second embodiment;
- Figure 4
- shows a cross section through an inventive linkage according to Figure 3.
Die Figuren werden nachstehend - soweit sie übereinstimmen - gemeinsam beschrieben, wobei gleiche Einzelheiten in den Figuren mit den gleichen Nummern belegt sind.The figures are described below, to the extent that they match, the same details being given the same numbers in the figures.
Es ist das untere Ende eines Bohr- und Injiziergestänges 1 erkennbar, das einen doppelwandigen Rohrkörper 2 umfaßt, der einen Ringraum 3 und einen zentralen Innenraum 4 ausbildet. Außen am Rohrkörper ist ein in Ansicht dargestellter Schneckengang 5 angesetzt. Nahe dem unteren Ende ist eine Mantelöffnung 6 im Rohrkörper vorgesehen, der mit einer Bohrspitze 7 abschließt.The lower end of a drilling and injection rod 1 can be seen, which comprises a double-walled
Nach den Figuren 1 und 2 ist der Ringraum 3 zu einem Längskanal 8 für Suspension und einem Längskanal 9 für Druckluft ausgebildet. Vom Längskanal 8 gehen zwei radiale Düsen 10, 11 aus, die Suspension ausbringen, insbesondere im Hochdruckstrahl. Diese Düsen sind durch Ringdüsen 12, 13 für Druckluft ummantelt. Vom Längskanal 9 für Druckluft geht außer den Ringdüsen 12, 13 eine weitere Düse 14 in den Innenraum 4 für das Rücklaufmaterial ab.According to Figures 1 and 2, the
Die Düsen 10, 11 befinden sich unterhalb der Mantelöffnung 6 im Rohrkörper, die Düse 14 oberhalb der Mantelöffnung.The
Nach den Figuren 3 und 4 ist der Ringraum 3 in einen Längskanal 8 für Suspension, einen Längskanal 9 für Druckluft und einen Längskanal 15 für Schneidwasser unterteilt. Von Längskanal 8 geht eine radiale Düse 16 aus, die Suspension ausbringt. Vom Längskanal 15 geht eine Düse 17 aus, die Schneidwasser unter hohem Druck ausbringt. Diese ist durch eine Ringdüse 18 für Druckluft ummantelt. Vom Längskanal 9 für Druckluft geht außer der Ringdüse 18 eine weitere Düse 14 in den Innenraum 4 für das Rücklaufmaterial ab. Die Düse 16 für Suspension befindet sich unterhalb der Mantelöffnung 6 im Rohrkörper, die Düsen 17 und 14 oberhalb.According to FIGS. 3 and 4, the
Das erfindungsgemäße Gestänge kann aus einzelnen Längsabschnitten zusammengesetzt sein.The linkage according to the invention can be composed of individual longitudinal sections.
Claims (16)
dadurch gekennzeichnet,
daß das Gestänge (1) im Schneckenbohrverfahren niedergebracht wird und daß beim Ziehen des Gestänges und beim Ausbringen der Bindemittelsuspension Überschußmaterial über das Innere des Bohr- und Injiziergestänges (1) abgeführt wird.Process for the production of solidified or sealing bodies in the ground, in particular in the form of columns or lamellas, in which a drill and injection rod (1) is sunk and pulled again with the application of binder suspension,
characterized,
that the rod (1) is brought down in the auger drilling process and that excess material is discharged over the interior of the drill and injection rod (1) when the rod is pulled and when the binder suspension is applied.
dadurch gekennzeichnet,
daß beim Ausbringen der Bindemittelsuspension Druckluft in das Innere des Gestänges (1) eingebracht wird.Method according to claim 1,
characterized,
that compressed air is introduced into the interior of the linkage (1) when the binder suspension is applied.
dadurch gekennzeichnet,
daß die Bindemittelsuspension in zumindest einem im wesentlichen radialen Schneidstrahl aus dem Bohr- und Injiziergestänge (1) ausgebracht wird, der vorzugsweise druckluftummantelt aus dem Bohr- und Injiziergestänge austritt.The method of claim 1 or 2,
characterized,
that the binder suspension is applied in at least one essentially radial cutting jet from the drilling and injecting rod (1), which preferably exits the drilling and injecting rod with compressed air jacketing.
dadurch gekennzeichnet,
daß Wasser in zumindest einem im wesentlichen radialen Schneidstrahl aus dem Bohr- und Injiziergestänge (1) ausgebracht wird, der vorzugsweise druckluftummantelt aus dem Bohr- und Injiziergestänge (1) austritt.The method of claim 1 or 2,
characterized,
that water is discharged from the drilling and injecting rod (1) in at least one essentially radial cutting jet, which preferably exits the drilling and injecting rod (1) with a compressed air jacket.
dadurch gekennzeichnet,
daß das Druckniveau der ins Innere des Gestänges (1) und der außen aus dem Gestänge (1) austretenden Druckluft unterschiedlich ist.Process according to claims 2 and 3 or 2 and 4,
characterized,
that the pressure level of the inside of the linkage (1) and the outside of the linkage (1) emerging compressed air is different.
dadurch gekennzeichnet,
daß das Gestänge (1) drehend - insbesondere im Gegensinn zur Drehrichtung beim Bohren - gezogen wird.Method according to one of claims 1 to 5,
characterized,
that the rod (1) is rotated - especially in the opposite direction to the direction of rotation when pulling.
dadurch gekennzeichnet,
daß das Gestänge (1) nicht-drehend gezogen wird.Method according to one of claims 1 to 6,
characterized,
that the linkage (1) is pulled non-rotating.
dadurch gekennzeichnet,
daß zumindest ein wendelförmiger Schneckengang (5) außen an den Rohrkörper (2) angesetzt ist, und daß der Rohrkörper (2) über zumindest eine Mantelöffnung (6) am unteren Ende des Gestänges (1) verfügt, der den zentralen Innenraum (4) mit der Umgebung ver- bindet.Drilling and injection rods (1) with a central tubular body (2), which forms a central interior (4) and an annular space (3), which is provided for guiding binder suspension and at least one nozzle outlet (10 - 13) at the lower end of the Linkage (1) to the environment.
characterized,
that at least one helical worm gear (5) is attached to the outside of the tubular body (2), and that the tubular body (2) has at least one jacket opening (6) at the lower end of the rod (1), which shares the central interior (4) connected to the environment.
dadurch gekennzeichnet,
daß der Ringraum (3) in zumindest zwei Längskanäle (8, 9) zur Führung von Bindemittelsuspension und Druckluft sowie ggfs. in einen Längskanal (15) zur Führung von Wasser unterteilt ist, die jeweils Austrittsdüsen (10, 11, 16; 12, 13, 18, 17) für Bindemittelsuspension (10, 11, 16) für Druckluft (12, 13, 18) und für Wasser (17) nach außen zur Umgebung haben.Linkage according to claim 8,
characterized,
that the annular space (3) is divided into at least two longitudinal channels (8, 9) for guiding binder suspension and compressed air and, if necessary, into a longitudinal channel (15) for guiding water, each of which has outlet nozzles (10, 11, 16; 12, 13 , 18, 17) for binder suspension (10, 11, 16) for compressed air (12, 13, 18) and for water (17) to the outside to the environment.
dadurch gekennzeichnet,
daß die Austrittsdüsen (12, 13, 16) für Druckluft die Austrittsdüsen (10, 11, 16) für einen Schneidstrahl aus Bindemittelsuspension (10, 11) oder Wasser (16) konzentrisch ringförmig umgeben.A drill pipe according to claim 9,
characterized,
that the outlet nozzles (12, 13, 16) for compressed air surround the outlet nozzles (10, 11, 16) for a cutting jet of binder suspension (10, 11) or water (16) concentrically in a ring.
dadurch gekennzeichnet,
daß zumindest eine Austrittsdüse (14) für Druckluft zum Innenraum (4) des Rohrkörpers (2) - insbesondere oberhalb der zumindest einen Mantelöffnung (6) -im Gestänge (1) angeordnet ist.Drill pipe according to one of claims 9 or 10,
characterized,
that at least one outlet nozzle (14) for compressed air to the interior (4) of the tubular body (2) - in particular above the at least one jacket opening (6) - is arranged in the linkage (1).
dadurch gekennzeichnet,
daß mehrere Austrittsdüsen für Druckluft zum Innenraum (4) des Rohrkörpers (2) in zueinander unterschiedlicher Höhe im Gestänge (1) angeordnet sind.A drill pipe according to claim 11,
characterized,
that several outlet nozzles for compressed air to the interior (4) of the tubular body (2) are arranged at different heights in the linkage (1).
dadurch gekennzeichnt,
daß die Austrittsdüsen (10, 11, 16) für Suspension unterhalb der zumindest einen Mantelöffnung (6) angeordnet sind.A drill pipe according to one of claims 9 to 12,
characterized by
that the outlet nozzles (10, 11, 16) for suspension are arranged below the at least one jacket opening (6).
dadurch gekennzeichnet,
daß zumindest eine Austrittsdüse (17) für einen Schneidstrahl - insbesondere aus Wasser - oberhalb der zumindest einen Mantelöffnung (6) angeordnet ist.Drill pipe according to one of claims 9 to 13,
characterized,
that at least one outlet nozzle (17) for a cutting jet - in particular from water - is arranged above the at least one jacket opening (6).
dadurch gekennzeichnet,
daß die zumindest eine Mantelöffnung (6) mit einer Verschlußkappe abdeckbar ist, die durch Druckbeaufschlagung des Innenraums (14) des Rohrkörpers (2) öffenbar oder entfernbar ist.Drill pipe according to one of claims 8 to 14,
characterized,
that the at least one jacket opening (6) can be covered with a sealing cap which can be opened or removed by pressurizing the interior (14) of the tubular body (2).
dadurch gekennzeichnet,
daß Mittel zur Beaufschlagung der Düsenaustritte (12, 13,; 14) für Druckluft zum Innenraum und zur Umgebung mit unterschiedlichem Druckniveau vorgesehen sind, insbesondere voneinander getrennte Längskanäle oder ein einzelner Längskanal mit unterschiedlichen Druckreduzierventilen.Linkage according to one of claims 11 to 15,
characterized,
that means for acting on the nozzle outlets (12, 13 ,; 14) for compressed air to the interior and to the environment are provided with different pressure levels, in particular separate longitudinal channels or a single longitudinal channel with different pressure reducing valves.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4323766 | 1993-07-15 | ||
DE4323766A DE4323766A1 (en) | 1993-07-15 | 1993-07-15 | Process for applying binder suspension |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0634528A2 true EP0634528A2 (en) | 1995-01-18 |
EP0634528A3 EP0634528A3 (en) | 1995-09-06 |
EP0634528B1 EP0634528B1 (en) | 1997-04-16 |
Family
ID=6492916
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP94111057A Expired - Lifetime EP0634528B1 (en) | 1993-07-15 | 1994-07-15 | Method for placing a binder suspension |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0634528B1 (en) |
AT (1) | ATE151834T1 (en) |
DE (2) | DE4323766A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7198434B2 (en) | 2004-07-13 | 2007-04-03 | Berkel & Company Contractors, Inc. | Full-displacement pressure grouted pile system and method |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19509053A1 (en) * | 1995-03-14 | 1996-09-26 | Coplan Ing Gmbh | Device for producing stabilising posts in soft ground |
DE19845132A1 (en) * | 1998-10-01 | 2000-04-06 | Hossein Hosseini Tudeshki | Compacting method for e.g. unconsolidated rocks uses one or more rotating spirals, with shape, length, pitch, direction, speed, all dependent upon edge conditions |
DE10003121A1 (en) * | 2000-01-26 | 2001-08-09 | Bilfinger Berger Bau | Drill for the injection of a strengthening medium into the ground has a hollow shaft linked to a pump to force the medium through outlet opening(s) at the drill shaft tip |
DE10150278B4 (en) * | 2001-10-12 | 2006-07-06 | Tracto-Technik Gmbh | Method and device for soil stabilization |
DE10308330B4 (en) * | 2003-02-26 | 2007-06-14 | Bauer Spezialtiefbau Gmbh | injection device |
CN101614008B (en) * | 2009-07-21 | 2011-04-06 | 苏州二建建筑集团有限公司 | Casting head for compact casting |
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GB796959A (en) * | 1955-06-06 | 1958-06-25 | Cementation Co Ltd | Improvements in or relating to the treatment of subterranean formations |
US3875751A (en) * | 1967-06-14 | 1975-04-08 | Kjeld F W Paus | Strengthening cohesive soils |
GB2062072A (en) * | 1979-10-31 | 1981-05-20 | Sanwa Kizai Co Ltd | Method of and Apparatus for the Construction of Mixed or Augered-in-place Piles |
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GB1234604A (en) * | 1967-06-14 | 1971-06-09 | ||
NL151761B (en) * | 1970-11-12 | 1976-12-15 | Yoshio Ichise | PROCEDURE FOR PRESSURE INJECTION OF A SOIL HARDENER. |
GB1374705A (en) * | 1971-05-11 | 1974-11-20 | Linden Alimak Ab | Implement for stabilising cohesive and friable earths |
SE383907B (en) * | 1974-06-04 | 1976-04-05 | Linden Alimak Ab | GROUND STABILIZATION EQUIPMENT DEVICE |
JPS61207712A (en) * | 1985-03-12 | 1986-09-16 | N I T:Kk | Method and device of improving ground |
DE3718480C2 (en) * | 1987-06-02 | 1994-04-14 | Bauer Spezialtiefbau | Drilling device for a high pressure injection drilling method and drilling method using the drilling device |
-
1993
- 1993-07-15 DE DE4323766A patent/DE4323766A1/en not_active Withdrawn
-
1994
- 1994-07-15 DE DE59402426T patent/DE59402426D1/en not_active Expired - Fee Related
- 1994-07-15 EP EP94111057A patent/EP0634528B1/en not_active Expired - Lifetime
- 1994-07-15 AT AT94111057T patent/ATE151834T1/en not_active IP Right Cessation
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB796959A (en) * | 1955-06-06 | 1958-06-25 | Cementation Co Ltd | Improvements in or relating to the treatment of subterranean formations |
US3875751A (en) * | 1967-06-14 | 1975-04-08 | Kjeld F W Paus | Strengthening cohesive soils |
GB2062072A (en) * | 1979-10-31 | 1981-05-20 | Sanwa Kizai Co Ltd | Method of and Apparatus for the Construction of Mixed or Augered-in-place Piles |
Non-Patent Citations (1)
Title |
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BAUTECHNIK ERNST Ÿ SOHN VERLAG, BERLIN, DE, Bd.67, Nr.7, 1990 Seiten A8 - A9, XP000195074 'Soilcrete f}r wasserundurchl{ssige Sohlen und W{nde von Baugruben' * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US7198434B2 (en) | 2004-07-13 | 2007-04-03 | Berkel & Company Contractors, Inc. | Full-displacement pressure grouted pile system and method |
Also Published As
Publication number | Publication date |
---|---|
DE59402426D1 (en) | 1997-05-22 |
DE4323766A1 (en) | 1995-01-19 |
ATE151834T1 (en) | 1997-05-15 |
EP0634528A3 (en) | 1995-09-06 |
EP0634528B1 (en) | 1997-04-16 |
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