EP0293584A1 - Drilling device for high pressure injection method - Google Patents

Drilling device for high pressure injection method Download PDF

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Publication number
EP0293584A1
EP0293584A1 EP88106156A EP88106156A EP0293584A1 EP 0293584 A1 EP0293584 A1 EP 0293584A1 EP 88106156 A EP88106156 A EP 88106156A EP 88106156 A EP88106156 A EP 88106156A EP 0293584 A1 EP0293584 A1 EP 0293584A1
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EP
European Patent Office
Prior art keywords
outer tube
drilling
drilling device
channel
flushing
Prior art date
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Granted
Application number
EP88106156A
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German (de)
French (fr)
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EP0293584B1 (en
Inventor
Johann Dipl.-Ing. Haberer
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Bauer Spezialtiefbau GmbH
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Bauer Spezialtiefbau GmbH
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Priority to AT88106156T priority Critical patent/ATE62293T1/en
Publication of EP0293584A1 publication Critical patent/EP0293584A1/en
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    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D7/00—Methods or apparatus for placing sheet pile bulkheads, piles, mouldpipes, or other moulds
    • E02D7/26—Placing by using several means simultaneously
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
    • E02D5/22—Piles
    • E02D5/34—Concrete or concrete-like piles cast in position ; Apparatus for making same
    • E02D5/38—Concrete or concrete-like piles cast in position ; Apparatus for making same making by use of mould-pipes or other moulds
    • E02D5/385—Concrete or concrete-like piles cast in position ; Apparatus for making same making by use of mould-pipes or other moulds with removal of the outer mould-pipes
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
    • E02D5/22—Piles
    • E02D5/34—Concrete or concrete-like piles cast in position ; Apparatus for making same
    • E02D5/46—Concrete or concrete-like piles cast in position ; Apparatus for making same making in situ by forcing bonding agents into gravel fillings or 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
    • E02D5/62—Compacting the soil at the footing or in or along a casing by forcing cement or like material through tubes
    • 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
    • E21B33/00—Sealing or packing boreholes or wells
    • E21B33/10—Sealing or packing boreholes or wells in the borehole
    • E21B33/13—Methods or devices for cementing, for plugging holes, crevices or the like
    • 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
    • E21B7/002—Drilling with diversely driven shafts extending into the borehole
    • 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
    • E21B7/20—Driving or forcing casings or pipes into boreholes, e.g. sinking; Simultaneously drilling and casing boreholes

Definitions

  • the invention relates to a drilling device for a high-pressure injection method with a first drilling drive and with a channel rod, which has at least one injection nozzle for the discharge of a high-pressure suspension and a drilling head at its end.
  • the invention further relates to a drilling method using this drilling device.
  • High pressure injection processes are used in civil engineering for the production of supporting and sealing walls in the ground, underpinning bodies or plate-shaped bodies for base seals.
  • a drill bit attached to a rod is primarily introduced with external rinsing.
  • a concrete-cement suspension is injected into the soil under high pressure via a horizontally oriented nozzle located in the lower part of the drill pipe.
  • By rotating the drill pipe it is possible to produce column-shaped injection bodies during withdrawal, the size and strength of which are determined by the choice of drawing speed, pump pressure and nozzle diameter.
  • the wall and plate-shaped injection bodies are obtained by connecting several columns.
  • the invention has for its object to provide a drilling device and a drilling method of the type mentioned, with which the accuracy of the holes is improved.
  • the invention has the advantage that the drilling of the channel rod is made easier by the drilling aid of the outer tube.
  • the guidance of the outer pipe ensures a more precise sinking.
  • a deviation of the channel rod from the predefined direction of propulsion can be effectively countered.
  • a preferred embodiment of the drilling device is that the outer tube is double-walled to form a feed channel for the flushing medium, which is provided with outlet openings in the area of the drill bit.
  • annular space is present between the outer tube and the channel rod. Excess injection sus pension can escape unhindered. This prevents uncontrolled injection suspension from causing uplifts in the ground. In addition, there is no risk of blockages that could otherwise occur when the borehole wall collapses. Since the distance between the outer tube and the duct linkage can be freely selected, an optimal adjustment to the drilling base can be made by appropriate selection of the outer tube diameter.
  • the channel linkage includes a feed for additional flushing medium for the drill head.
  • the drilling method is preferably developed in that the outer tube and the channel linkage can be rotated independently of one another with respect to their direction of rotation and / or their speed.
  • the propulsion of the channel rod and the outer tube are independent of one another.
  • FIG. 1 a drilling tool and the associated linkage is illustrated during a drilling phase.
  • the Bohr Tool consists of a double-walled outer tube 1 with a drill bit 2 at the end.
  • a separate, independent channel linkage 3 with a drill head 4 is arranged coaxially inside the outer tube 1.
  • both the outer tube 1 and the channel linkage 3 are each provided with a separate drill drive, which can be mounted above the ground, for example, on a carriage.
  • the outer tube 1 and the rod 3 are drilled simultaneously, the directions of rotation being able to be in opposite phases, as the arrows 6 indicate. It is also possible to provide different speeds due to the two independent drilling drives. The choice of the directions of rotation and the speeds is selected depending on the properties of the soil 5 with a view to optimal propulsion.
  • a flushing medium for example bentonite suspension, is introduced as a drilling aid for the outer tube through a feed channel 7 which is formed between the outer wall 8 and the inner wall 9 of the outer tube.
  • the necessary pumping equipment and storage tanks are installed on the surface of the earth.
  • the flushing medium In the area of the drill bit 2, the flushing medium reaches the soil acted upon by the drill bit 2 via outlet openings 10, which are distributed over the circumference of the outer tube 1.
  • the escaping flushing medium is provided with the reference number 11 in the figure.
  • the bottom of the drill is further processed using the drill head 4.
  • the drill head 4 is also provided with outlet openings (not shown) for further flushing medium which is supplied in the interior of the channel rod 3. It acts in the area 13 in front of the drill head 4.
  • FIG. 1 shows a configuration in which the outer tube 1 leads the channel rod 3. Depending on the geology, it can be the same be appropriately useful to guide the channel linkage 3 in front of the outer tube 1 or at the same height of the outer tube 1.
  • the linkage 3 has at least one injection nozzle 12, which is oriented essentially horizontally. It is connected in the interior of the channel linkage 3 via a feed line (not shown) to a high-pressure pump on the surface of the earth, via which a high-pressure suspension is introduced, as the following description explains.
  • the rod 3 After reaching the final depth, the rod 3 is brought into a position in which the injection nozzle 12 or, if appropriate, a plurality of such injection nozzles are in front of the drill bit 2. This position is illustrated in FIG. 2.
  • the high-pressure suspension 14 is then injected into the soil 5, a cylindrical injection body 15 being produced by rotating and pulling the drill pipe 3.
  • the outer tube 1 and the channel linkage 3 is partially shown in longitudinal section along the longitudinal center line 17. It can be seen that the channel linkage 3 consists of two coaxial tubes, the outer channel tube being provided with the reference number 18 and the inner channel tube with the reference number 20. The suspension is passed to the injection nozzle 12 via the inner sewer pipe 20.
  • this additional flushing medium can also be used to flush out the annular space 16.
  • the outer sewer pipe 18 is provided with at least one flushing nozzle 22, which directs a liquid jet from the bottom to the top. This measure ensures a continuous backflow in the annular space 16 and prevents clogging or partial narrowing of the annular space 16.
  • the emerging further flushing medium flows upward in the direction of the earth's surface and supports the transport of the drilling material which has been released from the drill bit 2 and the drill head 4 (FIG. 1) under the additional influence of flushing medium. It prevents this drill material from assembling or clumping in the annular space 16.
  • flushing nozzle 22 it may be sufficient to have a single flushing nozzle 22. If several such flushing nozzles are distributed along the circumference of the outer sewer pipe 18, the continuous transport of drillings to the surface of the earth can be further improved. In particular in the case of longer duct linkages 3, the flushing of the annular space 16 is supported when flushing nozzles are stacked vertically are arranged along the channel rod 3.

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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)
  • General Engineering & Computer Science (AREA)
  • Civil Engineering (AREA)
  • Paleontology (AREA)
  • Fluid Mechanics (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Earth Drilling (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
  • Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)

Abstract

A drilling device as well as a high-pressure injection method which can be carried out with the use of this drilling device for producing injection bodies in the ground are described. The drilling device comprises a rod (3) provided with a drill head. At its end, the rod (3) is provided with a drill bit (4) as well as at least one injection nozzle (12) for discharging injection suspension. The rod (3) is surrounded by an outer tube (1) which is provided with a further drill head (2) as well as with a feed channel (7) for flushing medium. Rod (3) and outer tube (1) can be operated independently of one another with regard to direction of rotation, rotary speed and drilling advance. After the final depth is reached, the rod (3) is moved into a position in which the injection nozzle (12) is in front of the outer-tube drill bit (2). During the subsequent withdrawal and injection, the outer tube (1) is retracted at the same time as the rod (3). Excess injection suspension can escape to the top in the annular space (16) between the outer tube (1) and the rod (3). <IMAGE>

Description

Die Erfindung betrifft eine Bohrvorrichtung für ein Hoch­druck-Injektions-Verfahren mit einem ersten Bohrantrieb und mit einem Kanalgestänge, welches mindestens eine In­jektionsdüse zum Austritt einer Hochdruck-Suspension und an Ihrem Ende einen Bohrkopf aufweist.The invention relates to a drilling device for a high-pressure injection method with a first drilling drive and with a channel rod, which has at least one injection nozzle for the discharge of a high-pressure suspension and a drilling head at its end.

Die Erfindung betrifft ferner ein Bohrverfahren unter Ver­wendung dieser Bohrvorrichtung.The invention further relates to a drilling method using this drilling device.

Hochdruck-Injektions-Verfahren werden im Tiefbau zu Her­stellung von Stütz- und Dichtwänden im Erdreich, Unter­fangungskörpern oder plattenförmigen Körpern für Sohl­dichtungen verwendet. Hierbei wird vornehmlich unter Außen­spülung eine an einem Gestänge angebrachte Bohrkrone ein­gebracht. Nach Erreichen der Endteufe wird über eine im unteren Teil des Bohrgestänges befindliche, horizontal ausgerichtete Düse unter Hochdruck eine Betonit-Zement-­Suspension in das Erdreich injiziert. Durch Drehen des Bohrgestänges ist es beim Zurückziehen möglich, säulenför­mige Injektionskörper herzustellen, deren Größe und Festig­keit durch die Wahl von Ziehgeschwindigkeit, Pumpdruck und Düsendurchmesser festgelegt wird. Durch Verbindung von mehreren Säulen erhält man die wand- und plattenförmigen Injektionskörper.High pressure injection processes are used in civil engineering for the production of supporting and sealing walls in the ground, underpinning bodies or plate-shaped bodies for base seals. In this case, a drill bit attached to a rod is primarily introduced with external rinsing. After reaching the final depth, a concrete-cement suspension is injected into the soil under high pressure via a horizontally oriented nozzle located in the lower part of the drill pipe. By rotating the drill pipe, it is possible to produce column-shaped injection bodies during withdrawal, the size and strength of which are determined by the choice of drawing speed, pump pressure and nozzle diameter. The wall and plate-shaped injection bodies are obtained by connecting several columns.

Obwohl derartige Hochdruck-Injektions-Verfahren, die auch als HDI-Verfahren bezeichnet werden, in den meisten Fällen erfolgreich eingesetzt werden, kann die relativ schlechte Zielgenauigkeit der Bohrungen als nachteilig bezeichnet wer­den.Although such high-pressure injection methods, which are also referred to as HDI methods, are successfully used in most cases, the relatively poor accuracy of the drilling can be described as disadvantageous.

Der Erfindung liegt die Aufgabe zugrunde, eine Bohr­vorrichtung sowie ein Bohrverfahren der eingangs ge­nannten Art anzugegen, mit welchen die Zielgenauigkeit der Bohrungen verbessert wird.The invention has for its object to provide a drilling device and a drilling method of the type mentioned, with which the accuracy of the holes is improved.

Diese Aufgabe wird dadurch gelöst, daß um das Kanalge­stänge ein separates Außenrohr mit einer separaten Bohr­krone und mit einem unabhängigen zweiten Bohrantrieb längs­verschieblich angeordnet ist. Verfahrensmäßig wird die Auf­gabe mit Hilfe dieser Bohrvorrichtung durch folgende Ver­fahrensschritte gelöst:

  • a) gleichzeitiges Abbohren des Kanalgestänges und des Außen­rohres,
  • b) Einleiten eines Spülmediums als Bohrhilfe für das Außen­rohr,
  • c) nach Erreichen der Endteufe Anordnen der Injektions­düse vor der Bohrkrone des Außenrohres und anschließend
  • d) gleichzeitiges Zurückziehen des Außenrohres und des Kanalgestänges unter Injektion der Hochdruck-Suspension.
This object is achieved in that a separate outer tube with a separate drill bit and with an independent second drill drive is arranged to be longitudinally displaceable around the channel linkage. In terms of method, the task is solved with the aid of this drilling device by the following method steps:
  • a) simultaneous drilling of the ductwork and the outer pipe,
  • b) introducing a flushing medium as a drilling aid for the outer tube,
  • c) after reaching the final depth, arrange the injection nozzle in front of the drill bit of the outer tube and then
  • d) simultaneous retraction of the outer tube and the channel rod with injection of the high pressure suspension.

Die Erfindung hat den Vorteil, daß das Abbohren des Kanal­gestänges durch die Bohrhilfe des Außenrohres erleichtert wird. Die Führung des Außenrohres gewährleistet ein ziel­genaueres Abteufen. Insbesondere bei horizontalem Vortrieb kann einem Abweichen des Kanalgestänges von der vorgege­benen Vortriebsrichtung wirksam begegnet werden.The invention has the advantage that the drilling of the channel rod is made easier by the drilling aid of the outer tube. The guidance of the outer pipe ensures a more precise sinking. In particular with horizontal propulsion, a deviation of the channel rod from the predefined direction of propulsion can be effectively countered.

Eine bevorzugte Ausgestaltung der Bohrvorrichtung besteht darin, daß das Außenrohr doppelwandig zur Bildung eines Zuführkanals für das Spülmedium ausgeführt ist, der im Bereich der Bohrkrone mit Austrittsöffnungen versehen ist.A preferred embodiment of the drilling device is that the outer tube is double-walled to form a feed channel for the flushing medium, which is provided with outlet openings in the area of the drill bit.

Ferner erweist es sich als vorteilhaft, daß zwischen dem Außenrohr und dem Kanalgestänge ein Ringraum vorhanden ist. Über diesen Zwischenraum kann überschüssige Injektions-Sus­ pension ungehindert nach oben entweichen. Somit wird ver­mieden, daß unkontrolliert austretende Injektions-Suspen­sion Hebungen im Boden verursacht. Außerdem besteht keine Gefahr von Verstopfungen, die ansonsten bei einem Einfal­len der Bohrlochwand auftreten könnten. Da der Abstand zwischen dem Außenrohr und dem Kanalgestänge frei wählbar ist, kann durch entsprechende Wahl des Außenrohrdurchmessers eine optimale Anpassung an den Bohrgrund vorgenommen werden.Furthermore, it proves to be advantageous that an annular space is present between the outer tube and the channel rod. Excess injection sus pension can escape unhindered. This prevents uncontrolled injection suspension from causing uplifts in the ground. In addition, there is no risk of blockages that could otherwise occur when the borehole wall collapses. Since the distance between the outer tube and the duct linkage can be freely selected, an optimal adjustment to the drilling base can be made by appropriate selection of the outer tube diameter.

Bevorzugt ist weiterhin vorgesehen, daß das Kanalgestänge eine Zuführung für weiteres Spülmedium für den Bohrkopf um­faßt. Das Bohrverfahren wird bevorzugt dadurch weitergebil­det, daß das Außenrohr und das Kanalgestänge bezüglich ihrer Drehrichtung und/oder ihrer Drehzahl unabhängig von­einander rotierbar sind.It is also preferably provided that the channel linkage includes a feed for additional flushing medium for the drill head. The drilling method is preferably developed in that the outer tube and the channel linkage can be rotated independently of one another with respect to their direction of rotation and / or their speed.

Ferner kann es von Vorteil sein, daß der Vortrieb des Ka­nalsgestänges und des Außenrohrs unabhängig voneinander sind.It can also be advantageous that the propulsion of the channel rod and the outer tube are independent of one another.

Durch diese Maßnahmen ist eine optimale Anpassung an die je­weilige Geologie sowohl beim Abbohren als auch beim Ziehen durchführbar. Der Bohrfortschritt des Außenrohres und des Kanalgestänges kann unabhängig voneinander gewählt werden. Weitere bevorzugte Ausgestaltungen der Erfindung sind in Un­teransprüchen beschrieben. Im folgenden wird die Erfindung anhand eines in Figuren dargestellten Ausführungsbeispieles weiter beschrieben.

  • Figur 1 zeigt schematisch einen Längsschnitt durch ein Bohrloch während des Abbohrens einer Bohrvorrichtung
  • Figur 2 zeigt schematisch einen Längsschnitt durch das Bohrloch ge­maß Figur 1 während des Ziehens der Bohrvorrichtung und
  • Figur 3 zeigt schematisch einen Längsschnitt durch die Bohrvorrichtung.
Through these measures, an optimal adaptation to the respective geology can be carried out both when drilling and when pulling. The drilling progress of the outer pipe and the ductwork can be selected independently of one another. Further preferred embodiments of the invention are described in the subclaims. In the following, the invention is further described with the aid of an exemplary embodiment shown in the figures.
  • Figure 1 shows schematically a longitudinal section through a borehole while drilling a drilling device
  • Figure 2 shows schematically a longitudinal section through the borehole according to Figure 1 while pulling the drilling device and
  • Figure 3 shows schematically a longitudinal section through the drilling device.

In Figur 1 ist ein Bohrwerkzeug und das zugehörige Ge­stänge während einer Bohrphase veranschaulicht. Das Bohr­ werkzeug besteht aus einem doppelwandigen Außenrohr 1 mit einer endseitigen Bohrkrone 2. Im Inneren des Außenrohres 1 ist koaxial ein separates, unabhängiges Kanalgestänge 3 mit einem Bohrkopf 4 angeordnet. Aus Gründen einer übersicht­lichen Darstellung ist nicht gezeigt, daß sowohl das Außen­rohr 1 als auch das Kanalgestänge 3 jeweils mit einem separaten Bohrantrieb versehen sind, die oberhalb des Erd­reichs beispielsweise auf einer Lafette montiert sein können.In Figure 1, a drilling tool and the associated linkage is illustrated during a drilling phase. The Bohr Tool consists of a double-walled outer tube 1 with a drill bit 2 at the end. A separate, independent channel linkage 3 with a drill head 4 is arranged coaxially inside the outer tube 1. For the sake of a clear representation, it is not shown that both the outer tube 1 and the channel linkage 3 are each provided with a separate drill drive, which can be mounted above the ground, for example, on a carriage.

Während der in der Figur 1 gezeigten Bohrphase wird das Außenrohr 1 und das Gestänge 3 gleichzeitig abgebohrt, wo­bei die Drehrichtungen gegenphasig sein können, wie die Drehrichtungspfeile 6 andeuten. Ebenso ist es möglich, auf­grund der beiden unabhängigen Bohrantriebe unterschiedliche Drehzahlen vorzusehen. Die Wahl der Drehrichtungen und der Drehzahlen wird in Abhängigkeit von den Eigenschaften des Erdreichs 5 im Hinblick auf einen optimalen Vortrieb ge­wählt. Durch einen Zuführkanal 7, der zwischen der Außen­wand 8 und der Innenwand 9 des Außenrohres gebildet ist, wird ein Spülmedium, beispielsweise Bentonit-Suspension, als Bohrhilfe für das Außenrohr eingeleitet. Die dazu er­forderlichen Pumpeinrichtungen und Vorratsbehälter sind an der Erdoberfläche installiert. Das Spülmedium gelangt im Bereich der Bohrkrone 2 über Austrittsöffnungen 10, die über den Umfang des Außenrohres 1 verteilt sind, in das von der Bohrkrone 2 beaufschlagte Erdreich. Das austretende Spülmedium ist in der Figur mit dem Bezugszeichen 11 verse­hen. Der Bohrgrund wird ferner mit Hilfe des Bohrkopfes 4 bearbeitet. Auch der Bohrkopf 4 ist mit Austrittsöffnungen (nicht dargestellt) für weiteres Spülmedium versehen, wel­ches im Inneren des Kanalgestänges 3 zugeführt wird. Es entfaltet seine Wirkung im Bereich 13 vor dem Bohrkopf 4.During the drilling phase shown in FIG. 1, the outer tube 1 and the rod 3 are drilled simultaneously, the directions of rotation being able to be in opposite phases, as the arrows 6 indicate. It is also possible to provide different speeds due to the two independent drilling drives. The choice of the directions of rotation and the speeds is selected depending on the properties of the soil 5 with a view to optimal propulsion. A flushing medium, for example bentonite suspension, is introduced as a drilling aid for the outer tube through a feed channel 7 which is formed between the outer wall 8 and the inner wall 9 of the outer tube. The necessary pumping equipment and storage tanks are installed on the surface of the earth. In the area of the drill bit 2, the flushing medium reaches the soil acted upon by the drill bit 2 via outlet openings 10, which are distributed over the circumference of the outer tube 1. The escaping flushing medium is provided with the reference number 11 in the figure. The bottom of the drill is further processed using the drill head 4. The drill head 4 is also provided with outlet openings (not shown) for further flushing medium which is supplied in the interior of the channel rod 3. It acts in the area 13 in front of the drill head 4.

In der Figur 1 ist eine Konfiguration dargestellt, bei wel­cher das Außenrohr 1 dem Kanalgestänge 3 vorauseilt. In Abhängigkeit von der jeweiligen Geologie kann es aber glei­ chermaßen zweckmäßig sein, das Kanalgestänge 3 vor dem Außenrohr 1 oder auf gleicher Höhe des Außenrohrs 1 zu führen.FIG. 1 shows a configuration in which the outer tube 1 leads the channel rod 3. Depending on the geology, it can be the same be appropriately useful to guide the channel linkage 3 in front of the outer tube 1 or at the same height of the outer tube 1.

Im unteren Bereich weist das Gestänge 3 mindestens eine Injektionsdüse 12 auf, die im wesentlichen horizontal aus­gerichtet ist. Sie ist im Inneren des Kanalgestänges 3 über eine Zuleitung (nicht dargestellt) mit einer Hoch­druckpumpe an der Erdoberfläche verbunden, über welche eine Hochdruck-Suspension eingeleitet wird, wie die nachfolgende Beschreibung erläutert.In the lower area, the linkage 3 has at least one injection nozzle 12, which is oriented essentially horizontally. It is connected in the interior of the channel linkage 3 via a feed line (not shown) to a high-pressure pump on the surface of the earth, via which a high-pressure suspension is introduced, as the following description explains.

Nach Erreichen der Endteufe wird das Gestänge 3 in eine Stellung gebracht, in welcher die Injektionsdüse 12 oder gegebenenfalls mehrere derartiger Injektionsdüsen vor der Bohrkrone 2 stehen. Diese Stellung veranschaulicht Figur 2. Anschließend wird die Hochdruck-Suspension 14 in das Erdreich 5 injiziert, wobei durch Drehen und Ziehen des Bohrgestänges 3 ein zylinderförmiger Injektionskörper 15 erzeugt wird.After reaching the final depth, the rod 3 is brought into a position in which the injection nozzle 12 or, if appropriate, a plurality of such injection nozzles are in front of the drill bit 2. This position is illustrated in FIG. 2. The high-pressure suspension 14 is then injected into the soil 5, a cylindrical injection body 15 being produced by rotating and pulling the drill pipe 3.

Gleichzeitig mit dem Kanalgestänge 3 wird auch das Außenrohr 1 zurückgezogen. Überschüssige Injektions-Suspension, die nicht mehr in das Erdreich 5 eindringen kann, tritt über eine Ringraum 16 zwischen dem Außenrohr 1 und dem KanaI­gestänge 3 nach oben an die Erdoberfläche aus.At the same time as the duct linkage 3, the outer tube 1 is also withdrawn. Excess injection suspension, which can no longer penetrate the soil 5, exits via an annular space 16 between the outer tube 1 and the channel rod 3 upwards to the earth's surface.

In Figur 3 ist das Außenrohr 1 und das Kanalgestänge 3 teil­weise im Längsschnitt entlang der Längsmittellinie 17 darge­stellt. Es wird ersichtlich, daß das Kanalgestänge 3 aus zwei koaxialen Rohren besteht, wobei das äußere Kanalrohr mit dem Bezugszeichen 18, das innere Kanalrohr mit dem Bezugszei­chen 20 versehen sind. Über das innere Kanalrohr 20 wird die Suspension an die Injektionsdüse 12 geleitet.In Figure 3, the outer tube 1 and the channel linkage 3 is partially shown in longitudinal section along the longitudinal center line 17. It can be seen that the channel linkage 3 consists of two coaxial tubes, the outer channel tube being provided with the reference number 18 and the inner channel tube with the reference number 20. The suspension is passed to the injection nozzle 12 via the inner sewer pipe 20.

Eine Spülleitung 21, die durch den Rohrraum zwischen dem äußeren Kanalrohr 18 und dem inneren Kanalrohr 20 gebildet wird, dient zur Versorgung mit dem weiteren Spülmedium, für das bevorzugt Wasser verwendet wird.A flushing line 21, which is formed by the tube space between the outer sewer pipe 18 and the inner sewer pipe 20, is used to supply the further flushing medium, for which water is preferably used.

Wie die Figur 3 veranschaulicht, kann dieses weitere Spül­medium auch zum Ausspülen des Ringraums 16 verwendet wer­den. Zu diesem Zweck ist das äußere Kanalrohr 18 mit min­destens einer Spüldüse 22 versehen, welche einen Flüssig­keitsstrahl von unten nach oben lenkt. Durch diese Maßnahme wird ein kontinuierlicher Rückfluß im Ringraum 16 sicherge­stellt, und ein Verstopfen oder teilweises Verengen des Ringraums 16 verhindert.As FIG. 3 illustrates, this additional flushing medium can also be used to flush out the annular space 16. For this purpose, the outer sewer pipe 18 is provided with at least one flushing nozzle 22, which directs a liquid jet from the bottom to the top. This measure ensures a continuous backflow in the annular space 16 and prevents clogging or partial narrowing of the annular space 16.

Das austretende weitere Spülmedium fließt nach oben in Rich­tung auf die Erdoberfläche und unterstützt den Transport des Bohrguts, das von der Bohrkrone 2 und dem Bohrkopf 4 (Figur 1) unter dem zusätzlichen Einfluß von Spülmedium gelöst wurde. Es verhindert, daß sich dieses Bohrgut im Ringraum 16 zusammen­setzt oder verklumpt.The emerging further flushing medium flows upward in the direction of the earth's surface and supports the transport of the drilling material which has been released from the drill bit 2 and the drill head 4 (FIG. 1) under the additional influence of flushing medium. It prevents this drill material from assembling or clumping in the annular space 16.

Grundsätzlich kann es ausreichend sein, daß eine einzige Spüldüse 22 vorhanden ist. Werden mehrere derartiger Spül­düsen entlang des Umfangs des äußeren Kanalrohrs 18 ver­teilt, so kann der kontinuierliche Bohrguttransport an die Erdoberfläche weiter verbessert werden. Insbesondere bei längeren Kanalgestängen 3 wird die Spülung des Ring­raums 16 unterstützt, wenn Spüldüsen vertikal übereinander entlang des Kanalgestänges 3 angeordnet sind.In principle, it may be sufficient to have a single flushing nozzle 22. If several such flushing nozzles are distributed along the circumference of the outer sewer pipe 18, the continuous transport of drillings to the surface of the earth can be further improved. In particular in the case of longer duct linkages 3, the flushing of the annular space 16 is supported when flushing nozzles are stacked vertically are arranged along the channel rod 3.

Da eine Verstopfung oder Verengung des Ringraums 16 nicht nur beim Abbohren eintreten kann, wird die Spüldüse 22 gleichermaßen beim Rückziehen der Bohrvorrichtung, wie es im Zusammenhang mit Figur 2 beschrieben ist, betätigt. In dieser Phase wird überschüssige Hochdruck-Suspension nach oben abgeführt.Since blockage or narrowing of the annular space 16 cannot only occur during drilling, the flushing nozzle 22 is actuated equally when the drilling device is withdrawn, as described in connection with FIG. 2. In this phase, excess high-pressure suspension is discharged upwards.

Claims (13)

1. Bohrvorrichtung für Hochdruckinjektionsverfahren mit einem ersten Bohrantrieb und mit einem Kanalge­stänge, welches mindestens eine Injektionsdüse zum Austritt einer Hochdruck-Suspension und an ihrem Ende einen Bohrkopf aufweist,
dadurch gekennzeichnet, daß um das Kanalgestänge (3) ein separates Außenrohr (1) mit einer separaten Bohr­krone (2) und mit einem unabhängigen zweiten Bohrantrieb längsverschieblich angeordnet ist.1. Drilling device for high-pressure injection methods with a first drill drive and with a channel rod which has at least one injection nozzle for the discharge of a high-pressure suspension and a drill head at its end,
characterized in that a separate outer tube (1) with a separate drill bit (2) and with an independent second drill drive is arranged to be longitudinally displaceable around the duct linkage (3). 2. Bohrvorrichtung nach Anspruch 1,
dadurch gekennzeichnet, daß das Außenrohr (1) doppelwandig zur Bildung eines Zuführkanals (7) für Spülmedium (11) ausgeführt ist, der im Bereich der Bohrkrone (2) mit Austrittsöffnungen (10) versehen ist.2. Drilling device according to claim 1,
characterized in that the outer tube (1) is double-walled to form a feed channel (7) for flushing medium (11) which is provided with outlet openings (10) in the area of the drill bit (2). 3. Bohrvorrichtung nach Anspruch 1 oder 2,
dadurch gekennzeichnet, daß zwischen dem Außen­rohr (1) und dem Kanalgestänge (3) ein Ringraum (16) vor­handen ist.3. Drilling device according to claim 1 or 2,
characterized in that an annular space (16) is present between the outer tube (1) and the channel linkage (3). 4. Bohrvorrichtung nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, daß das Kanalgestänge (3) eine Spülleitung für ein weiteres Spülmedium für den Bohr­kopf (4) umfaßt.4. Drilling device according to one of the preceding claims,
characterized in that the channel linkage (3) comprises a flushing line for a further flushing medium for the drill head (4). 5. Bohrvorrichtung nach einem der vorhergehenden Ansprüche,
dadurch gekennzeichnet, daß das Kanalgestänge (3) mindestens eine in den Ring­raum (16) austretende und in Vortriebsrichtung hinter der Injektionsdüse (12) angeordnete Spüldüse (22) aufweist.5. Drilling device according to one of the preceding claims,
characterized in that the channel linkage (3) has at least one flushing nozzle (22) which emerges into the annular space (16) and is arranged behind the injection nozzle (12) in the direction of advance. 6. Bohrvorrichtung nach Anspruch 5,
dadurch gekennzeichnet, daß die Spüldüse (22) vom bohrkopfseitigen Ende wegge­richtet ist.6. Drilling device according to claim 5,
characterized in that the flushing nozzle (22) is directed away from the end on the drill head side. 7. Bohrvorrichtung nach Anspruch 5 oder 6,
dadurch gekennzeichnet, daß mehrere Spüldüsen (22) über den Umfang des Kanalge­stänges (3) verteilt sind.7. Drilling device according to claim 5 or 6,
characterized in that a plurality of flushing nozzles (22) are distributed over the circumference of the channel linkage (3). 8. Bohrvorrichtung nach einem der Ansprüche 5 bis 7,
dadurch gekennzeichnet, daß mehrere Spüldüsen (22) über die Länge des Kanalge­stänges (3) verteilt sind.8. Drilling device according to one of claims 5 to 7,
characterized in that a plurality of flushing nozzles (22) are distributed over the length of the channel linkage (3). 9. Bohrverfahren unter Verwendung der Bohrvorrichtung nach Anspruch 1,
gekennzeichnet durch folgende Verfahrens­schritte: a) gleichzeitiges Abbohren des Kanalgestänges (3) und des Außenrohres (1), b) Einleiten eines Spülmediums (11) als Bohrhilfe für das Außenrohr (1), c) nach Erreichen der Endteufe Anordnen der Injektions­düse (12) vor der Bohrkrone (2) des Außenrohres und anschließend d) gleichzeitiges Zurückziehen des Außenrohres (1) und des Kanalgestänges (3) unter Injektion der Hochdruck-­Suspension (14). 9. drilling method using the drilling device according to claim 1,
characterized by the following process steps: a) simultaneous drilling of the channel rod (3) and the outer tube (1), b) introducing a flushing medium (11) as a drilling aid for the outer tube (1), c) after reaching the final depth, arrange the injection nozzle (12) in front of the drill bit (2) of the outer tube and then d) simultaneous withdrawal of the outer tube (1) and the channel rod (3) with injection of the high pressure suspension (14). 10. Bohrverfahren nach Anspruch 9,
dadurch gekennzeichnet, daß das Außenrohr (1) und das Kanalgestänge (3) mit unterschiedlicher Drehrichtung bewegt werden.10. drilling method according to claim 9,
characterized in that the outer tube (1) and the channel linkage (3) are moved with different directions of rotation. 11. Bohrverfahren nach Anspruch 9 oder 10,
dadurch gekennzeichnet, daß das Außenrohr (1) und das Kanalgestänge (3) mit unterschiedlicher Drehzahl bewegt werden.11. drilling method according to claim 9 or 10,
characterized in that the outer tube (1) and the channel linkage (3) are moved at different speeds. 12. Bohrverfahren nach einem der Ansprüche 9 bis 11,
dadurch gekennzeichnet, daß das Außenrohr (1) und das Kanalgestänge (3) mit unterschiedlichem Vortrieb abgeteuft werden.12. Drilling method according to one of claims 9 to 11,
characterized in that the outer tube (1) and the channel linkage (3) are sunk with different propulsion. 13. Bohrverfahren nach einem der Ansprüche 9 bis 12,
dadurch gekennzeichnet, daß während des Abteufens und/oder Zurückziehens über eine Spüldüse (22) weiteres Spülmedium in den Ringraum (16) zur Spülung des Ringraums (16) eingeleitet wird.13. Drilling method according to one of claims 9 to 12,
characterized in that, during the sinking and / or withdrawal, further flushing medium is introduced into the annular space (16) for flushing the annular space (16) via a flushing nozzle (22).
EP88106156A 1987-06-02 1988-04-18 Drilling device for high pressure injection method Expired - Lifetime EP0293584B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88106156T ATE62293T1 (en) 1987-06-02 1988-04-18 DRILLING DEVICE FOR A HIGH PRESSURE INJECTION DRILLING METHOD.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3718480A DE3718480C2 (en) 1987-06-02 1987-06-02 Drilling device for a high pressure injection drilling method and drilling method using the drilling device
DE3718480 1987-06-02

Publications (2)

Publication Number Publication Date
EP0293584A1 true EP0293584A1 (en) 1988-12-07
EP0293584B1 EP0293584B1 (en) 1991-04-03

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EP (1) EP0293584B1 (en)
AT (1) ATE62293T1 (en)
DE (2) DE3718480C2 (en)

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FR2680380A1 (en) * 1991-08-14 1993-02-19 Nit Co Ltd METHOD FOR PRODUCING A UNIVERSAL FOUNDATION BODY AND DEVICE FOR IMPLEMENTING SAID METHOD
EP0853162A3 (en) * 1997-01-10 1999-02-03 Juan Vicente Herrero Codina Device and process for foundation piling with drilling machines
EP1124037A1 (en) * 2000-02-08 2001-08-16 Günter Prof. Dr.-Ing. Klemm Drilling device
DE102011000320A1 (en) * 2011-01-25 2012-07-26 TERRA AG für Tiefbautechnik Drilling rig for drilling holes in the soil
WO2017028645A1 (en) * 2015-08-18 2017-02-23 山东大学 Anti-collapse two-way rib wing jet grouting drill, grouting consolidation system and method
CN118360942A (en) * 2024-06-19 2024-07-19 四川坤德智联科技有限公司 Multi-shaft multi-layer mutual shearing high-spraying stirring pile construction drilling tool and use method thereof

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DE3718631A1 (en) * 1987-06-03 1988-12-22 Gkn Keller Gmbh Combined injection method as well as apparatus for producing a highly consolidated soil volume while simultaneously stabilising the adjacent soil
DE4121394A1 (en) * 1991-06-28 1993-01-14 Klemm Bohrtech Injection method of underground mineral extraction - using drill string with injection head used as drill bit, and flushing up loosened material from deposit to top of drill string
DE4138356A1 (en) * 1991-11-21 1993-05-27 Gu Tiefbau Ag DRILLING DEVICE FOR DEEP CONSTRUCTION AND METHOD FOR MANUFACTURING STABILIZING SAEULES OR SIMILAR PICTURES IN EARTH
DE4323766A1 (en) * 1993-07-15 1995-01-19 Keller Grundbau Gmbh Process for applying binder suspension
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DE10319800A1 (en) * 2003-04-30 2004-11-25 Kleis, Simone Hollow crown for core-drilling machine, has pipe with cutting elements arranged at front side along the propulsion direction, and a central fluid supply with its outlet set within the sphere of activity of the cutting elements
DE102006023799B4 (en) * 2006-05-20 2014-05-15 Franki Grundbau Gmbh & Co.Kg Device for producing foundation elements
DE102007023736B4 (en) * 2007-05-22 2011-01-20 Bauer Spezialtiefbau Gmbh Fast setting HDI
RU2386786C2 (en) * 2008-02-14 2010-04-20 Открытое акционерное общество "Сургутнефтегаз" Treatment method of high-permeability of well
CN109441425B (en) * 2018-11-20 2022-02-11 常州大学 A method for measuring rock-carrying capacity of a horizontal well double-wall drill pipe system
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EP1124037A1 (en) * 2000-02-08 2001-08-16 Günter Prof. Dr.-Ing. Klemm Drilling device
DE102011000320A1 (en) * 2011-01-25 2012-07-26 TERRA AG für Tiefbautechnik Drilling rig for drilling holes in the soil
WO2017028645A1 (en) * 2015-08-18 2017-02-23 山东大学 Anti-collapse two-way rib wing jet grouting drill, grouting consolidation system and method
US11085244B2 (en) 2015-08-18 2021-08-10 Shandong University Anti-collapse jet grouting drill bit with bi-directional rib wings, grouting consolidation system and method
CN118360942A (en) * 2024-06-19 2024-07-19 四川坤德智联科技有限公司 Multi-shaft multi-layer mutual shearing high-spraying stirring pile construction drilling tool and use method thereof

Also Published As

Publication number Publication date
ATE62293T1 (en) 1991-04-15
DE3718480C2 (en) 1994-04-14
DE3718480C1 (en) 1988-09-22
EP0293584B1 (en) 1991-04-03
DE3862239D1 (en) 1991-05-08

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