EP3112580A1 - Method and device for forming an underground pipeline - Google Patents

Method and device for forming an underground pipeline Download PDF

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Publication number
EP3112580A1
EP3112580A1 EP16176198.6A EP16176198A EP3112580A1 EP 3112580 A1 EP3112580 A1 EP 3112580A1 EP 16176198 A EP16176198 A EP 16176198A EP 3112580 A1 EP3112580 A1 EP 3112580A1
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EP
European Patent Office
Prior art keywords
drill
drill shank
bore
cavity
shank
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EP16176198.6A
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German (de)
French (fr)
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EP3112580B1 (en
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Werner Zimmer
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Individual
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Individual
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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
    • 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
    • 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
    • E21B11/00—Other drilling tools
    • 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
    • E21B7/04—Directional drilling

Definitions

  • the invention relates to a method for forming an underground pipeline and an apparatus for carrying out the method.
  • the present invention has for its object to provide a simpler compared to the prior art method for forming the underground pipeline.
  • the object is achieved in that from a cavity in the bottom of a hole with horizontal direction component using a drilling tool, which includes a hollow drill shank is introduced into the soil, the drill shank after insertion of the drilling tool remains in the ground and the pipeline through the Drill shank is formed.
  • the formation of the tubing through the hollow drill shank out of the cavity provides the opportunity to drill and install the tubing in a single process step. Since the drilling and laying can be carried out completely underground, no material must be removed from the earth's surface and it must be made no precautions.
  • the bore can be formed as a blind hole or as a connecting hole between two cavities, preferably two shafts.
  • the drill shaft is formed from at least two tubular segments which can be connected to one another at their ends.
  • additional segments are successively attached to an end of the drill shank facing away from a drill bit in order to extend the drill shank.
  • pipelines can be formed whose lengths can be a multiple of the diameter of the cavity.
  • the work can be carried out even from narrow shafts out.
  • the segments are expediently provided with threads for their connection at their ends, wherein the segments are preferably designed such that the outer surfaces of respective adjacent segments are flush with one another.
  • the threads are provided in such a direction that the segments are bolted together by the torque applied during drilling.
  • the segments must then be screwed together, but not necessary, they screw together firmly or to fix them separately in the screwed position.
  • soil material separated from the soil which is arranged in the drill shank during drilling, is flushed out of the drill shank by means of a flushing liquid.
  • the flushing liquid is moved along the outside of the drill shaft.
  • a lubricating film which reduces drilling forces between the drill shank outer surface and the ground occurring frictional forces, so for introducing the hole in the soil, in particular by soil, rock , Concrete and / or combinations thereof may be formed, only a comparatively small torque is necessary.
  • Soil material in the area of the drill bit is loosened and drilling is facilitated thereby.
  • the irrigation fluid is moved along the outside of the drill shank to a drill bit disposed at one end of the drill shank and through the drill bit into the interior of the drill shank.
  • Soil material that accumulates in the interior of the drill shaft during drilling and is formed by a drill core and / or by material comminuted during drilling is moved out of the drill shaft counter to the drilling direction and out at the end of the drill shaft which is arranged in said cavity taken from the drill shank.
  • the inner diameter of the drill bit is smaller than the inner diameter of the drill shaft to form a gap between the outer surface of the drill core and the inner surface of the drill shaft in the axial direction of the drill shank.
  • the gap has a width ⁇ 10 mm, preferably ⁇ 5 mm.
  • a width ⁇ 3 mm may be sufficient.
  • the outer diameter of the drill bit is larger than the outer diameter of the drill shaft to form between the outer surface of the drill shaft and the inner wall of the bore in the axial direction of the drill shank a gap which preferably completely surrounds the drill shaft.
  • the gap serves to supply the rinsing liquid, on the other hand, the said lubricating film is formed in it.
  • This gap also expediently has a width ⁇ 10 mm, preferably ⁇ 5 mm.
  • a width ⁇ 3 mm may be sufficient.
  • the flushing liquid when it swells, after completion of the bore close the space formed between the drill shank and the inner wall of the bore and / or cavities present in the ground and thereby stabilize the underground pipeline.
  • a sealing device is arranged, which arranged in the bore portion outer surface of the drill shank against the cavity, in particular the gap formed between the drill shank outer surface and a bore inner wall , seals.
  • the sealing device preferably has a fastening ring for fastening the sealing device in the cavity, a sealing ring which is provided for resting on the outer surface of the drill shaft and optionally a clamping ring, by means of which the sealing ring is held on the fastening ring.
  • the sealing ring is expediently placed with its inside sealing on the outside of the drill shank, so that the annular gap is completely covered by the sealing ring.
  • it can be avoided when drilling and laying below the groundwater level through the sealing device that groundwater penetrates through the gap in the cavity.
  • the device according to the invention has a flushing device, by means of which the flushing fluid can be introduced into the bore, in particular the gap formed between the drill shaft outer surface and the inner wall of the bore.
  • a flushing device can be set up to control a flushing agent flow rate, a flushing agent flow speed and / or a pressure with which the flushing agent is introduced into the bore.
  • the purging device can be equipped with a measuring device which determines the difference between the amount of rinsing fluid introduced and the amount of rinsing fluid which is flushed out of the drill shaft. By such a measurement, information about a condition of the soil, in particular about the porosity of the soil or possibly existing cavities, can be obtained.
  • the device according to the invention comprises a device for holding, moving and guiding the drilling tool, which is preferably provided for arrangement in the cavity.
  • a device for control and / or regulation of the bore in particular to be able to arrange it outside the cavity, for example on the earth's surface next to the cavity, be spatially separated from the movement, holding and guiding device.
  • the device is provided with a spraying device, by means of which a liquid, hardenable support material, preferably concrete, seen in the direction of drilling before the drill shank and the drill bit can be introduced into the soil.
  • the spraying device preferably has a lance, through which the liquid support material can be introduced into the soil and which is inserted into the soil in such a way that its end, through which the support material emerges, is arranged in the drilling direction in front of the drill head.
  • the support material By means of the support material, porous or unstable soil in which the pipeline is to be formed can be solidified. This can on the one hand be ensured that the pipeline can be laid in a desired direction, on the other hand, the pipeline can be better supported by the support material in the ground.
  • the support material is introduced simultaneously with the bore, wherein expediently support material is used which cures so quickly that even relatively short time, preferably at most 5 minutes, can be drilled into the solidified support material after spraying.
  • the support material e.g. fast-setting concrete or a thermoset, for example, a cast resin.
  • Fig. 1 shows two arranged in a soil 7 vertical wells 9,10, the are connected to each other by means of an existing, clogged by a deposit pipe 19 18, which is provided for example for the exchange of liquids for groundwater regulation between the two shafts 9,10.
  • a subterranean pipeline 41 which extends in the horizontal direction (arrow 43) and is formed from tubular segments 20-22 of the drill shaft 4 is provided for forming a new connection of the shaft 9 with the shaft 10, introduced into the soil 7.
  • the finished pipeline 41 shows Fig. 4 ,
  • An in Fig. 1 shown drilling apparatus 2 for the preparation of the pipeline 41 has a drive means 6 and a drilling tool 3, which comprises a drill bit 5 and the hollow shaft 20 formed from the hollow cylindrical segments 20-22.
  • the drive device 6 is provided to drive the drilling tool 2 into the ground 7 and to exert a torque on the drilling tool 2.
  • both the outer diameter and the inner diameter of the drill bit 5 are larger than those of the drill shank 4 the rinsing liquid is entered.
  • a core which possibly forms in the drill shank 4 has an outer diameter which is smaller than the inner diameter of the drill shank 4 and thereby prevents the core settling in the drill shank 4.
  • the drilling device 2 further comprises a device 11 for aligning the drill shank 4 during drilling and means 13 for fixing the drilling device 2 in the shaft 9, by means of which the drilling device 2 is clamped to an inner wall 14 of the shaft wall in the shaft 9.
  • the fastening means 13 are for this purpose on opposite wall portions of the inner wall 14 of the shaft 9 to form a frictional connection.
  • the drilling apparatus 2 further has a drive unit 15 and a device 16 for controlling and / or regulating the drive unit 15 and a flushing device 24 explained below, which can be arranged outside the shaft 9.
  • the drive unit 15, which preferably comprises a hydraulic unit, generates a force which is transmitted via a connecting line 17 to the drive means 6 and there in the torque for drilling and a propelling force of Drill 2 is converted.
  • the drilling device 2 is provided with a sealing device 40, through which the segments 20-22 of the drill shank 4 are guided and which is arranged on a shaft wall 14 of the shaft 9.
  • the sealing device 40 comprises a metal ring 45 to be fastened to the shaft wall, a clamping ring 46 and a sealing ring 47 to be clamped between clamping ring 46 and metal ring 45, which is provided for bearing on an outer side of the drill shank 4.
  • the tubular segments 20,21 of the drill shank 4 are provided at their ends with threads, by means of which they can be screwed together.
  • the segments 20-22 are preferably formed from a stainless steel which has a high enough strength to transmit the torque for drilling and suitable corrosion properties. It will be appreciated that the segments 20-22 may be made of other materials such as e.g. Aluminum, composites, steel and / or cast iron could be formed.
  • Fig. 3 shows the said rinsing device 24, which is provided for introducing a swelling rinse liquid, such as bentonite, in the annular gap 25 under pressure (arrow 26).
  • a flow rate and the pressure of the introduced rinsing liquid is regulated by means of the regulating device 16.
  • the flushing liquid flows along the outside of the drill shank 4 to the drill bit 5 (arrow 27) and forms a lubricating film between the inner wall of the bore 8 and the drill shank 4. It then flows around the drill bit 5 and flows through it into the interior of the drill shank 4 (Arrow 28). In this case, the soil 7 is loosened in an area around the drill bit 5 and thereby facilitates the bore.
  • a rinsing fluid flow formed in the interior of the drill shank 4 material being chipped from the drill bit 5 is transported to the shaft 9 during drilling (arrow 29, 30) and fed to a collecting device 31, which is preferably located outside the shaft 9 and for which a separate pump can be provided.
  • a collecting device 31 which is preferably located outside the shaft 9 and for which a separate pump can be provided.
  • a separate drilling device from the shaft 9 drilled out and broken it or be pushed out of the pipe 41 after completion of the bore.
  • a shaft wall bore is provided in the inner wall 14 of the shaft 9, through which the drill shaft 4 formed from the first segment 20 can be guided with the drill bit 5 arranged at one end of the segment 20, and the sealing device 40 is fastened to the inner wall 14.
  • the drilling device 2 is positioned on the bottom of the shaft 9 and fixed by means of the fastening means 13 on wall portions of the shaft 9 on the inner wall 14.
  • the segment 20 is introduced into the alignment device 11, to which the drill bit 5 is attached at one end.
  • the side of the segment 20 facing away from the drill bit 5 is connected to the drive device 6 such that the segment 20 forming the drill bit shaft can transmit the torque for drilling to the drill bit 5.
  • the drill bit 5 and the first segment 20 are moved through the sealing ring 46 of the sealing device 40 and started with the bore.
  • the rinsing liquid is introduced into the annular gap 25 by means of the rinsing device 24 (FIG. Fig. 2 ).
  • a scavenging pressure, with which the rinsing liquid is introduced into the gap 25, is adjusted by means of the regulating device 16 such that it is greater than the pressure of the groundwater in order to push the groundwater away from the processed area.
  • the rinsing liquid flows along the outer surface of the drill shank 4 and through the drill bit 5 to form the lubricating film. It may also flow into voids 32 present in the soil 7 to fill them ( Fig. 2 , Arrow 33). After refluxing through the segment 20, the flushing liquid exits the interior of the drill shank 4 and is transported into the collecting device 31 together with the material separated and comminuted during drilling from the ground.
  • the drill bit 5 When the drill bit 5 reaches the other shaft 10, it is removed from the segment 20 and the end of the segment 20 is secured in the shaft and sealed.
  • the sealing device 40 and the drilling device 2 are removed from the shaft 9 and secured the last inserted segment 22 in the shaft 9 and the segment 22 sealed against the inner wall of the shaft 9.
  • the drill shank 4 remains in the ground 7 and forms the underground pipe 41, which is now functional.
  • a further drilling device 2a according to the invention which is suitable in particular for the formation of the underground pipeline in soft, unstable and / or porous soils, differs from that according to FIGS Fig. 1 to 3 in that a tubular lance 35 is guided through the interior of a drill shank 4a and projects with an end section 36 through a drill bit 5a out of the drill shank 4a.
  • the lance 35 is formed from segments not shown here, can be successively extended and move in the drill shank 4a back and forth in order to arrange them as the bore progresses continuously in front of the drill bit 5a can.
  • a curable material eg fast-hardening concrete
  • a curable material eg fast-hardening concrete
  • the hole is as above using the Fig. 1-3 described carried out.
  • the previously stabilized by the material area is now indeed pierced and the previously introduced material removed again, the space surrounding the hole, but is stabilized by the material.
  • the injection of the material into the bottom 7a and the subsequent drilling of the material takes place step by step or continuously.

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
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  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
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  • Earth Drilling (AREA)

Abstract

Die Erfindung betrifft ein Verfahren zur Bildung einer unterirdischen Rohrleitung. Erfindungsgemäß wird von einem Hohlraum (9,10) im Boden aus eine Bohrung (8) mit horizontaler Richtungskomponente unter Verwendung eines Bohrwerkzeugs (2), das einen hohlen Bohrerschaft (4) umfasst, in den Boden (7) eingebracht, wobei der Bohrerschaft (4) nach Einbringung des Bohrwerkzeugs (2) im Boden (7) verbleibt und die Rohrleitung (41) durch den Bohrerschaft (4) gebildet wird. Die Erfindung betrifft ferner eine Vorrichtung zur Durchführung des Verfahrens.The invention relates to a method for forming an underground pipeline. According to the invention, from a cavity (9, 10) in the bottom, a bore (8) with a horizontal directional component is introduced into the base (7) using a drilling tool (2) comprising a hollow drill shank (4), wherein the drill shank ( 4) after introduction of the drilling tool (2) in the bottom (7) remains and the pipe (41) through the drill shank (4) is formed. The invention further relates to a device for carrying out the method.

Description

Die Erfindung betrifft ein Verfahren zur Bildung einer unterirdischen Rohrleitung sowie eine Vorrichtung zur Durchführung des Verfahrens.The invention relates to a method for forming an underground pipeline and an apparatus for carrying out the method.

Ein solches Verfahren ist aus dem Tiefbau bekannt. Zur Verbindung von vertikalen Schächten wird mit einem Bagger eine Grube ausgehoben, in der die Rohrleitung verlegt wird. Danach wird die Grube mit dem zuvor entnommenen Erdreich verschlossen. Dieses Verfahren wird z.B. angewandt, wenn eine beschädigte Rohrleitung einer Kanalisation ausgetauscht werden muss. Als nachteilig bei diesem Verfahren erweist sich der große Aufwand, der zum Aushub der Grube betrieben werden muss. Darüber hinaus kann der Aushub problematisch sein, wenn dazu beispielsweise eine Straße gesperrt werden muss.Such a method is known from civil engineering. For the connection of vertical shafts a pit is dug with a digger, in which the pipeline is laid. Thereafter, the pit is closed with the previously removed soil. This method is e.g. applied when a damaged pipeline in a sewer system has to be replaced. A disadvantage of this method proves the great effort that must be operated to excavate the pit. In addition, excavation can be problematic if, for example, a road has to be closed.

Der vorliegenden Erfindung liegt die Aufgabe zugrunde, ein im Vergleich zum Stand der Technik einfacheres Verfahren zur Bildung der unterirdischen Rohrleitung zu schaffen.The present invention has for its object to provide a simpler compared to the prior art method for forming the underground pipeline.

Erfindungsgemäß wird die Aufgabe dadurch gelöst, dass von einem Hohlraum im Boden aus eine Bohrung mit horizontaler Richtungskomponente unter Verwendung eines Bohrwerkzeugs, das einen hohlen Bohrerschaft umfasst, in den Boden eingebracht wird, der Bohrerschaft nach Einbringung des Bohrwerkzeugs im Boden verbleibt und die Rohrleitung durch den Bohrerschaft gebildet wird.According to the invention the object is achieved in that from a cavity in the bottom of a hole with horizontal direction component using a drilling tool, which includes a hollow drill shank is introduced into the soil, the drill shank after insertion of the drilling tool remains in the ground and the pipeline through the Drill shank is formed.

Die Bildung der Rohrleitung durch den hohlen Bohrerschaft aus dem Hohlraum heraus eröffnet die Möglichkeit, die Bohrung und Verlegung der Rohrleitung in einem einzigen Verfahrensschritt durchzuführen. Da sich die Bohrung und Verlegung gänzlich unterirdisch durchführen lässt, muss kein Material von der Erdoberfläche abgetragen werden und es müssen dafür keine Vorkehrungen getroffen werden. Die Bohrung kann als Sacklochbohrung oder als Verbindungsbohrung zwischen zwei Hohlräumen, vorzugsweise zwei Schächten, ausgebildet werden.The formation of the tubing through the hollow drill shank out of the cavity provides the opportunity to drill and install the tubing in a single process step. Since the drilling and laying can be carried out completely underground, no material must be removed from the earth's surface and it must be made no precautions. The bore can be formed as a blind hole or as a connecting hole between two cavities, preferably two shafts.

In einer besonders bevorzugten Ausführungsform der Erfindung wird der Bohrerschaft aus mindestens zwei rohrförmigen, an ihren Enden miteinander verbindbaren Segmenten gebildet. Zum Aufbau des Bohrerschafts werden sukzessive zusätzliche Segmente an ein von einer Bohrkrone abgewandtes Ende des Bohrerschafts angebracht, um den Bohrerschaft zu verlängern. Auf diese Weise lassen sich Rohrleitungen bilden, deren Längen ein Vielfaches des Durchmessers des Hohlraums betragen können. Vorteilhaft können die Arbeiten auch aus engen Schächten heraus durchgeführt werden.
Zweckmäßigerweise sind die Segmente zu Ihrer Verbindung an Ihren Enden mit Gewinden versehen, wobei die Segmente vorzugsweise derart ausgebildet sind, dass die Außenflächen jeweilig benachbarter Segmente bündig miteinander abschließen. Vorzugsweise sind die Gewinde in einer derartigen Richtung vorgesehen, dass die Segmente durch das beim Bohren aufgebrachte Drehmoment miteinander verschraubt werden. Zum Zusammensetzen des Bohrerschafts müssen die Segmente dann zwar ineinander geschraubt werden, nicht notwendig aber ist, sie fest miteinander verschrauben oder sie in der verschraubten Position gesondert zu fixieren.In a particularly preferred embodiment of the invention, the drill shaft is formed from at least two tubular segments which can be connected to one another at their ends. To construct the drill shank, additional segments are successively attached to an end of the drill shank facing away from a drill bit in order to extend the drill shank. In this way, pipelines can be formed whose lengths can be a multiple of the diameter of the cavity. Advantageously, the work can be carried out even from narrow shafts out.
The segments are expediently provided with threads for their connection at their ends, wherein the segments are preferably designed such that the outer surfaces of respective adjacent segments are flush with one another. Preferably, the threads are provided in such a direction that the segments are bolted together by the torque applied during drilling. To assemble the drill shank, the segments must then be screwed together, but not necessary, they screw together firmly or to fix them separately in the screwed position.

In einer Ausgestaltung der Erfindung wird aus dem Boden herausgetrenntes Bodenmaterial, welches sich beim Bohren in dem Bohrerschaft anordnet, mittels einer Spülflüssigkeit aus dem Bohrerschaft ausgespült.In one embodiment of the invention, soil material separated from the soil, which is arranged in the drill shank during drilling, is flushed out of the drill shank by means of a flushing liquid.

Zweckmäßigerweise wird die Spülflüssigkeit entlang der Außenseite des Bohrerschafts bewegt. Zwischen der Außenfläche des Bohrerschafts und dem Erdreich bildet sich durch die entlang der Außenseite des Bohrerschafts strömende Spülflüssigkeit ein Schmierfilm, der beim Bohren zwischen der Bohrerschaftaußenfläche und dem Boden auftretende Reibkräfte reduziert, sodass zum Einbringen der Bohrung in den Boden, der insbesondere durch Erdboden, Gestein, Beton und/oder Kombinationen davon gebildet sein kann, lediglich ein vergleichsweise geringes Drehmoment notwendig ist. Außerdem erweist sich als vorteilhaft, dass durch die Spülflüssigkeit Bodenmaterial im Bereich der Bohrkrone aufgelockert wird und das Bohren dadurch erleichtert wird. Ferner wird durch die Ausbildung des Schmierfilms vermieden, dass sich der Bohrerschaft in der Bohrung festsetzt.
Vorzugsweise wird die Spülflüssigkeit entlang der Außenseite des Bohrerschafts bis zu einer Bohrkrone, die an einem Ende des Bohrerschafts angeordnet ist, und durch die Bohrkrone hindurch in das Innere des Bohrerschafts bewegt. Bodenmaterial, das sich beim Bohren im Innern des Bohrerschafts ansammelt und durch einen Bohrkern und/oder durch beim Bohren zerkleinertes Material gebildet ist, wird entgegen der Bohrrichtung aus dem Bohrerschaft bewegt und an dem Ende des Bohrerschafts, der in dem genannten Hohlraum angeordnet ist, aus dem Bohrerschaft entnommen.Conveniently, the flushing liquid is moved along the outside of the drill shaft. Between the outer surface of the drill stem and the soil forms by the flowing along the outside of the drill shaft flushing a lubricating film, which reduces drilling forces between the drill shank outer surface and the ground occurring frictional forces, so for introducing the hole in the soil, in particular by soil, rock , Concrete and / or combinations thereof may be formed, only a comparatively small torque is necessary. In addition, it proves to be advantageous that by the rinsing liquid Soil material in the area of the drill bit is loosened and drilling is facilitated thereby. Furthermore, it is avoided by the formation of the lubricating film that sets the drill shank in the bore.
Preferably, the irrigation fluid is moved along the outside of the drill shank to a drill bit disposed at one end of the drill shank and through the drill bit into the interior of the drill shank. Soil material that accumulates in the interior of the drill shaft during drilling and is formed by a drill core and / or by material comminuted during drilling is moved out of the drill shaft counter to the drilling direction and out at the end of the drill shaft which is arranged in said cavity taken from the drill shank.

Zwar wäre es auch möglich, die Spülflüssigkeit in entgegengesetzter Richtung, d.h. zunächst innerhalb des Bohrerschaftes durch die Bohrkrone hindurchzuführen und dann auf der Außenseite des Bohrerschafts zu bewegen. Dies hat sich gegenüber der vorgenannten Variante allerdings als nachteilig erwiesen, da dann größere Mengen des zerkleinerten Materials entlang der Außenseite des Bohrerschafts zu bewegen sind und den Bohrvorgang stören können.While it would be possible to have the rinse liquid in the opposite direction, i. first pass through the drill bit inside the drill shank and then move on the outside of the drill shank. However, this has proven to be disadvantageous compared to the aforementioned variant, since then larger amounts of the crushed material are to be moved along the outside of the drill shaft and can interfere with the drilling process.

In einer Ausführungsform der Erfindung ist vorgesehen, dass der Innendurchmesser der Bohrkrone kleiner ist als der Innendurchmesser des Bohrerschafts, um zwischen der Außenfläche des Bohrkerns und der Innenfläche des Bohrerschafts in Axialrichtung des Bohrerschafts gesehen einen Spalt zu bilden. Dadurch wird ein Raum gebildet, durch den die Spülflüssigkeit ablaufen kann, und darüber hinaus vermieden, dass sich der Bohrkern in dem Bohrerschaft festsetzt. Zweckmäßigerweise weist der Spalt eine Breite ≤ 10 mm, bevorzugt ≤ 5 mm, auf. Abhängig vom Bodenmaterial kann auch eine Breite ≤ 3 mm ausreichend sein.
Ergänzend oder alternativ dazu kann vorgesehen sein, dass der Außendurchmesser der Bohrkrone größer ist als der Außendurchmesser des Bohrerschafts, um zwischen der Außenfläche des Bohrerschafts und der Innenwand der Bohrung in Axialrichtung des Bohrerschafts gesehen einen Spalt zu bilden, der den Bohrerschaft vorzugsweise vollständig umgibt. Der Spalt dient zum einen zur Zuführung der Spülflüssigkeit, zum anderen bildet sich in ihm der genannte Schmierfilm aus. Auch dieser Spalt weist zweckmäßigerweise eine Breite ≤ 10 mm, vorzugsweise ≤ 5 mm, auf. Auch hier kann je nach Bodenmaterial eine Breite ≤ 3 mm ausreichend sein.
In einer weiteren Ausgestaltung der Erfindung wird als die Spülflüssigkeit eine, vorzugsweise aufquellende, insbesondere Bentonit aufweisende, Flüssigkeit, verwendet. Vorteilhaft kann die Spülflüssigkeit, wenn sie aufquillt, nach Abschluss der Bohrung den zwischen Bohrerschaft und Innenwand der Bohrung gebildeten Raum und/oder im Boden vorhandene Hohlräume verschließen und dadurch die unterirdische Rohrleitung stabilisieren.In one embodiment of the invention, it is provided that the inner diameter of the drill bit is smaller than the inner diameter of the drill shaft to form a gap between the outer surface of the drill core and the inner surface of the drill shaft in the axial direction of the drill shank. Thereby, a space is formed through which the rinsing liquid can drain, and moreover prevents the drill core from settling in the drill shaft. Conveniently, the gap has a width ≤ 10 mm, preferably ≤ 5 mm. Depending on the soil material, a width ≤ 3 mm may be sufficient.
Additionally or alternatively, it can be provided that the outer diameter of the drill bit is larger than the outer diameter of the drill shaft to form between the outer surface of the drill shaft and the inner wall of the bore in the axial direction of the drill shank a gap which preferably completely surrounds the drill shaft. On the one hand, the gap serves to supply the rinsing liquid, on the other hand, the said lubricating film is formed in it. This gap also expediently has a width ≦ 10 mm, preferably ≦ 5 mm. Here, too, depending on the soil material, a width ≤ 3 mm may be sufficient.
In a further embodiment of the invention is as the rinsing liquid, a preferably swelling, in particular bentonite having, liquid used. Advantageously, the flushing liquid, when it swells, after completion of the bore close the space formed between the drill shank and the inner wall of the bore and / or cavities present in the ground and thereby stabilize the underground pipeline.

Zweckmäßigerweise wird in dem genannten Hohlraum, von dem aus die Bohrung vorgenommen wird, insbesondere an einer Innenwand des Hohlraums, eine Dichtungseinrichtung angeordnet, die einen in der Bohrung angeordneten Abschnitt Außenfläche des Bohrerschafts gegen den Hohlraum, insbesondere den zwischen der Bohrerschaftaußenfläche und einer Bohrungsinnenwand gebildeten Spalt, abdichtet. Die Dichtungseinrichtung weist vorzugsweise einen Befestigungsring zur Befestigung der Dichtungseinrichtung in dem Hohlraum, einen Dichtungsring, der zur Auflage auf der Außenfläche des Bohrerschafts vorgesehen ist und ggf. einen Klemmring auf, mittels dessen der Dichtungsring an dem Befestigungsring gehalten wird. Der Dichtungsring wird zweckmäßigerweise mit seiner Innenseite dichtend auf der Außenseite des Bohrerschafts aufgelegt, so dass der ringförmige Spalt von dem Dichtungsring vollständig überdeckt wird. Vorteilhaft lässt sich bei Bohrung und Verlegung unterhalb des Grundwasserspiegels durch die Dichtungseinrichtung vermeiden, dass Grundwasser durch den Spalt in den Hohlraum eindringt.Conveniently, in said cavity, from which the bore is made, in particular on an inner wall of the cavity, a sealing device is arranged, which arranged in the bore portion outer surface of the drill shank against the cavity, in particular the gap formed between the drill shank outer surface and a bore inner wall , seals. The sealing device preferably has a fastening ring for fastening the sealing device in the cavity, a sealing ring which is provided for resting on the outer surface of the drill shaft and optionally a clamping ring, by means of which the sealing ring is held on the fastening ring. The sealing ring is expediently placed with its inside sealing on the outside of the drill shank, so that the annular gap is completely covered by the sealing ring. Advantageously, it can be avoided when drilling and laying below the groundwater level through the sealing device that groundwater penetrates through the gap in the cavity.

In einer Ausführungsform der Erfindung weist die erfindungsgemäße Vorrichtung eine Spüleinrichtung auf, mittels derer sich die Spülflüssigkeit in die Bohrung, insbesondere den zwischen der Bohrerschaftaußenfläche und der Innenwand der Bohrung gebildeten Spalt einbringen lässt. Eine solche Spüleinrichtung kann zur Regelung einer Spülmitteldurchflussmenge, einer Spülmittelströmungsgeschwindigkeit und/oder eines Drucks, mit dem das Spülmittel in die Bohrung eingebracht wird, eingerichtet sein. Ferner kann die Spüleinrichtung mit einer Messeinrichtung ausgestattet sein, die die Differenz zwischen der Menge an eingebrachter Spülflüssigkeit und der Menge an Spülflüssigkeit, die aus dem Bohrerschaft ausgespült wird, bestimmt. Durch eine solche Messung kann Information über eine Beschaffenheit des Bodens, insbesondere über die Porosität des Bodens oder ggf. vorhandene Hohlräume, gewonnen werden.In one embodiment of the invention, the device according to the invention has a flushing device, by means of which the flushing fluid can be introduced into the bore, in particular the gap formed between the drill shaft outer surface and the inner wall of the bore. Such a flushing device can be set up to control a flushing agent flow rate, a flushing agent flow speed and / or a pressure with which the flushing agent is introduced into the bore. Furthermore, the purging device can be equipped with a measuring device which determines the difference between the amount of rinsing fluid introduced and the amount of rinsing fluid which is flushed out of the drill shaft. By such a measurement, information about a condition of the soil, in particular about the porosity of the soil or possibly existing cavities, can be obtained.

In einer Ausgestaltung der Erfindung umfasst die erfindungsgemäße Vorrichtung eine Einrichtung zum Halten, Bewegen und Führen des Bohrwerkzeugs, die vorzugsweise zur Anordnung in dem Hohlraum vorgesehen ist. Eine Einrichtung zur Steuerung und/oder Regelung der Bohrung kann, insbesondere um sie außerhalb des Hohlraums, z.B. auf der Erdoberfläche neben dem Hohlraum, anordnen zu können, räumlich von der Bewegung-, Haltungs- und Führungseinrichtung getrennt sein.In one embodiment of the invention, the device according to the invention comprises a device for holding, moving and guiding the drilling tool, which is preferably provided for arrangement in the cavity. A device for control and / or regulation of the bore, in particular to be able to arrange it outside the cavity, for example on the earth's surface next to the cavity, be spatially separated from the movement, holding and guiding device.

In einer Weiterbildung der Erfindung ist die Vorrichtung mit einer Spritzeinrichtung versehen, mittels derer sich ein flüssiges, aushärtbares Stützmaterial, vorzugsweise Beton, in Bohrrichtung gesehen vor dem Bohrerschaft und der Bohrkrone in den Boden einbringen lässt. Die Spritzeinrichtung weist vorzugsweise eine Lanze auf, durch die hindurch das flüssige Stützmaterial in den Boden eingebracht werden kann und die derart in den Boden eingeschoben wird, dass ihr Ende, durch das hindurch das Stützmaterial austritt, in Bohrrichtung gesehen vor dem Bohrkopf angeordnet ist.In one embodiment of the invention, the device is provided with a spraying device, by means of which a liquid, hardenable support material, preferably concrete, seen in the direction of drilling before the drill shank and the drill bit can be introduced into the soil. The spraying device preferably has a lance, through which the liquid support material can be introduced into the soil and which is inserted into the soil in such a way that its end, through which the support material emerges, is arranged in the drilling direction in front of the drill head.

Mittels des Stützmaterials kann poröser oder instabiler Boden, in welchem die Rohrleitung gebildet werden soll, verfestigt werden. Dadurch kann zum einen sichergestellt werden, dass die Rohrleitung in einer gewünschten Richtung verlegt werden kann, zum anderen lässt sich die Rohrleitung durch das Stützmaterial besser im Boden abstützen. In einer Ausführungsform der Erfindung wird das Stützmaterial gleichzeitig mit der Bohrung eingebracht, wobei zweckmäßigerweise Stützmaterial verwendet wird, dass derart schnell aushärtet, dass schon verhältnismäßig kurze Zeit, vorzugsweise höchstens 5 min, nach dem Spritzen in das verfestigte Stützmaterial gebohrt werden kann. Als das Stützmaterial eignet sich z.B. schnellhärtender Beton oder ein Duroplast, beispielsweise ein Gießharz.By means of the support material, porous or unstable soil in which the pipeline is to be formed can be solidified. This can on the one hand be ensured that the pipeline can be laid in a desired direction, on the other hand, the pipeline can be better supported by the support material in the ground. In one embodiment of the invention, the support material is introduced simultaneously with the bore, wherein expediently support material is used which cures so quickly that even relatively short time, preferably at most 5 minutes, can be drilled into the solidified support material after spraying. As the support material, e.g. fast-setting concrete or a thermoset, for example, a cast resin.

Im Folgenden wird die Erfindung anhand zweier Ausführungsbeispiele und der beiliegenden, sich auf dieses Ausführungsbeispiel beziehenden Zeichnungen weiter erläutert. Es zeigen jeweils im Schnitt:

Fig. 1
eine in einem Untergrund angeordnete erfindungsgemäße Vorrichtung,
Fig. 2
ein Detail der Vorrichtung nach Fig. 1,
Fig. 3
ein Detail der Vorrichtung nach Fig. 1 im Bereich einer Bohrkrone der Vorrichtung,
Fig. 4
eine mittels des erfindungsgemäßen Verfahrens hergestellte Rohrleitung, und
Fig. 5
ein Detail einer weiteren erfindungsgemäßen Vorrichtung.
In the following the invention with reference to two embodiments and the accompanying, referring to this embodiment drawings will be further explained. It shows in section:
Fig. 1
a device according to the invention arranged in a subsurface,
Fig. 2
a detail of the device after Fig. 1 .
Fig. 3
a detail of the device after Fig. 1 in the area of a drill bit of the device,
Fig. 4
a pipeline produced by the method according to the invention, and
Fig. 5
a detail of another device according to the invention.

Fig. 1 zeigt zwei in einem Erdboden 7 angeordnete vertikale Schächte 9,10, die mittels einer bestehenden, durch eine Ablagerung 19 verstopfte Rohrleitung 18 miteinander verbunden sind, welche beispielsweise zum Austausch von Flüssigkeiten zur Grundwasserregulierung zwischen den beiden Schächten 9,10 vorgesehen ist. Fig. 1 shows two arranged in a soil 7 vertical wells 9,10, the are connected to each other by means of an existing, clogged by a deposit pipe 19 18, which is provided for example for the exchange of liquids for groundwater regulation between the two shafts 9,10.

Ausgehend vom Schacht 9 wird mittels des erfindungsgemäßen Verfahrens eine sich in horizontaler Richtung (Pfeil 43) erstreckende, aus rohrförmigen Segmenten 20-22 des Bohrerschafts 4 gebildete unterirdische Rohrleitung 41, die zur Bildung einer neuen Verbindung des Schacht 9 mit dem Schacht 10 vorgesehen ist, in den Erdboden 7 eingebracht. Die fertiggestellte Rohrleitung 41 zeigt Fig. 4.Starting from the shaft 9, by means of the method according to the invention, a subterranean pipeline 41 which extends in the horizontal direction (arrow 43) and is formed from tubular segments 20-22 of the drill shaft 4 is provided for forming a new connection of the shaft 9 with the shaft 10, introduced into the soil 7. The finished pipeline 41 shows Fig. 4 ,

Eine in Fig. 1 dargestellte Bohrvorrichtung 2 zur Herstellung der Rohrleitung 41 weist eine Antriebseinrichtung 6 und ein Bohrwerkzeug 3 auf, das eine Bohrkrone 5 und den aus den hohlzylindrischen Segmenten 20-22 gebildeten Bohrerschaft 4 umfasst. Die Antriebseinrichtung 6 ist dazu vorgesehen, das Bohrwerkzeug 2 in den Erdboden 7 hinein zu treiben und ein Drehmoment auf das Bohrwerkzeug 2 auszuüben.An in Fig. 1 shown drilling apparatus 2 for the preparation of the pipeline 41 has a drive means 6 and a drilling tool 3, which comprises a drill bit 5 and the hollow shaft 20 formed from the hollow cylindrical segments 20-22. The drive device 6 is provided to drive the drilling tool 2 into the ground 7 and to exert a torque on the drilling tool 2.

Wie Fig. 3 zu entnehmen ist, sind sowohl der Außendurchmesser als auch der Innendurchmesser der Bohrkrone 5 größer als diejenigen des Bohrerschafts 4. Dadurch wird zum einen zwischen der Außenfläche des Bohrerschafts 4 und der Innenwand einer mittels des Bohrwerkzeugs 3 gebildeten Bohrung 8 ein Spalt 25 gebildet, in den die Spülflüssigkeit eingegeben wird. Zum anderen wird erreicht, dass ein sich ggf. in dem Bohrerschaft 4 bildender Bohrkern einen Außendurchmesser aufweist, der kleiner ist als der Innendurchmesser des Bohrerschafts 4 und dadurch vermieden, dass sich der Bohrkern in dem Bohrerschaft 4 festsetzt.As Fig. 3 As a result, both the outer diameter and the inner diameter of the drill bit 5 are larger than those of the drill shank 4 the rinsing liquid is entered. On the other hand, it is achieved that a core, which possibly forms in the drill shank 4, has an outer diameter which is smaller than the inner diameter of the drill shank 4 and thereby prevents the core settling in the drill shank 4.

Die Bohrvorrichtung 2 umfasst ferner eine Einrichtung 11 zur Ausrichtung des Bohrerschafts 4 während des Bohrens und Mittel 13 zur Befestigung der Bohrvorrichtung 2 in dem Schacht 9, mittels derer die Bohrvorrichtung 2 an einer Innenwand 14 der Schachtwand in dem Schacht 9 festklemmt wird. Die Befestigungsmittel 13 liegen dazu an einander gegenüberliegenden Wandabschnitten der Innenwand 14 des Schachts 9 unter Bildung einer kraftschlüssigen Verbindung an.
Die Bohrvorrichtung 2 weist ferner eine Antriebseinheit 15 und eine Einrichtung 16 zum Steuern und/oder Regeln der Antriebseinheit 15 und einer nachfolgend erläuterten Spüleinrichtung 24 auf, die außerhalb des Schachts 9 angeordnet werden können. Die Antriebseinheit 15, die vorzugsweise ein Hydraulikaggregat umfasst, erzeugt eine Kraft, welche über eine Verbindungsleitung 17 an die Antriebseinrichtung 6 übertragen wird und dort in das Drehmoment zum Bohren und eine Vortriebskraft des Bohrwerkzeugs 2 umgewandelt wird.The drilling device 2 further comprises a device 11 for aligning the drill shank 4 during drilling and means 13 for fixing the drilling device 2 in the shaft 9, by means of which the drilling device 2 is clamped to an inner wall 14 of the shaft wall in the shaft 9. The fastening means 13 are for this purpose on opposite wall portions of the inner wall 14 of the shaft 9 to form a frictional connection.
The drilling apparatus 2 further has a drive unit 15 and a device 16 for controlling and / or regulating the drive unit 15 and a flushing device 24 explained below, which can be arranged outside the shaft 9. The drive unit 15, which preferably comprises a hydraulic unit, generates a force which is transmitted via a connecting line 17 to the drive means 6 and there in the torque for drilling and a propelling force of Drill 2 is converted.

Außerdem ist die Bohrvorrichtung 2 mit einer Dichtungseinrichtung 40 versehen, durch die die Segmente 20-22 des Bohrerschafts 4 hindurch geführt werden und die an einer Schachtwand 14 des Schachts 9 angeordnet ist. Die Dichtungseinrichtung 40 umfasst einen an der Schachtwand zu befestigenden Metallring 45, einen Klemmring 46 sowie einen zwischen Klemmring 46 und Metallring 45 zu verklemmenden Dichtungsring 47, der zur Anlage auf einer Außenseite des Bohrerschafts 4 vorgesehen ist.
Durch die Dichtungseinrichtung 40 wird vermieden, dass aus dem die Bohrung umgebenden Bereich Grundwasser in den Schacht 9 eindringt. Auf diese Weise wird eine Verlegung der Rohrleitung unterhalb des Grundwasserspiegels ermöglicht.In addition, the drilling device 2 is provided with a sealing device 40, through which the segments 20-22 of the drill shank 4 are guided and which is arranged on a shaft wall 14 of the shaft 9. The sealing device 40 comprises a metal ring 45 to be fastened to the shaft wall, a clamping ring 46 and a sealing ring 47 to be clamped between clamping ring 46 and metal ring 45, which is provided for bearing on an outer side of the drill shank 4.
By means of the sealing device 40 it is avoided that ground water enters the shaft 9 from the region surrounding the bore. In this way, a laying of the pipeline below the groundwater level is made possible.

Die rohrförmigen Segmente 20,21 des Bohrerschafts 4 sind an ihren Enden mit Gewinden versehen, mittels derer sie sich miteinander verschrauben lassen. Die Segmente 20-22 sind bevorzugt aus einem Edelstahl gebildet, das eine ausreichend hohe Festigkeit zur Übertragung des Drehmoments zum Bohren und geeignete Korrosionseigenschaften aufweist. Es versteht sich, dass die Segmente 20-22 auch aus anderen Materialien wie z.B. Aluminium, Verbundwerkstoffen, Stahl und/oder Gusseisen gebildet sein könnten.The tubular segments 20,21 of the drill shank 4 are provided at their ends with threads, by means of which they can be screwed together. The segments 20-22 are preferably formed from a stainless steel which has a high enough strength to transmit the torque for drilling and suitable corrosion properties. It will be appreciated that the segments 20-22 may be made of other materials such as e.g. Aluminum, composites, steel and / or cast iron could be formed.

Fig. 3 zeigt die genannte Spüleinrichtung 24, die zur Einbringung einer aufquellenden Spülflüssigkeit, z.B. Bentonit, in den ringförmigen Spalt 25 unter Druck vorgesehen ist (Pfeil 26). Eine Durchflussmenge und der Druck der eingebrachten Spülflüssigkeit wird mittels der Regelungseinrichtung 16 geregelt. Die Spülflüssigkeit strömt entlang der Außenseite des Bohrerschafts 4 bis zur Bohrkrone 5 (Pfeil 27) und bildet dabei einen Schmierfilm zwischen der Innenwand der Bohrung 8 und dem Bohrerschaft 4. Sie umströmt anschließend die Bohrkrone 5 und strömt durch diese hindurch in das Innere des Bohrerschafts 4 (Pfeil 28). Dabei wird der Erdboden 7 in einem Bereich um die Bohrkrone 5 aufgelockert und dadurch die Bohrung erleichtert. Fig. 3 shows the said rinsing device 24, which is provided for introducing a swelling rinse liquid, such as bentonite, in the annular gap 25 under pressure (arrow 26). A flow rate and the pressure of the introduced rinsing liquid is regulated by means of the regulating device 16. The flushing liquid flows along the outside of the drill shank 4 to the drill bit 5 (arrow 27) and forms a lubricating film between the inner wall of the bore 8 and the drill shank 4. It then flows around the drill bit 5 and flows through it into the interior of the drill shank 4 (Arrow 28). In this case, the soil 7 is loosened in an area around the drill bit 5 and thereby facilitates the bore.

Durch eine im Inneren des Bohrerschafts 4 gebildete Spülflüssigkeitsströmung wird beim Bohren zerspantes Material von der Bohrkrone 5 weg hin zum Schacht 9 transportiert (Pfeil 29,30) und einer Sammeleinrichtung 31 zugeführt, die sich vorzugsweise außerhalb des Schachts 9 befindet und für die eine eigene Pumpe vorgesehen sein kann. Falls z.B. in Beton oder Gestein gebohrt wird und der Bohrkern zu stabil ist, um unter der Wirkung der Spülflüssigkeit zu zerfallen, kann er mittels einer gesonderten Bohreinrichtung vom Schacht 9 aus aufgebohrt und damit aufgebrochen werden oder nach Fertigstellung der Bohrung aus der Rohrleitung 41 herausgedrückt werden.By means of a rinsing fluid flow formed in the interior of the drill shank 4, material being chipped from the drill bit 5 is transported to the shaft 9 during drilling (arrow 29, 30) and fed to a collecting device 31, which is preferably located outside the shaft 9 and for which a separate pump can be provided. For example, if drilled in concrete or rock and the core is too stable to disintegrate under the action of the irrigation fluid, it can by means of a Separate drilling device from the shaft 9 drilled out and broken it or be pushed out of the pipe 41 after completion of the bore.

Im Folgenden wird der Ablauf des Verfahrens erläutert, bei dem eine horizontale, unterirdische Rohrleitung 41 in den Erdboden 7 eingebracht wird.In the following, the procedure of the method is explained, in which a horizontal, underground pipeline 41 is introduced into the soil 7.

Zunächst wird in die Innenwand 14 des Schachts 9 eine Schachtwandbohrung vorgesehen, durch die hindurch sich der aus dem ersten Segment 20 gebildete Bohrerschaft 4 mit der an einem Ende des Segments 20 angeordnete Bohrkrone 5 führen lässt, und die Dichtungseinrichtung 40 an der Innenwand 14 befestigt.First, a shaft wall bore is provided in the inner wall 14 of the shaft 9, through which the drill shaft 4 formed from the first segment 20 can be guided with the drill bit 5 arranged at one end of the segment 20, and the sealing device 40 is fastened to the inner wall 14.

Anschließend wird die Bohrvorrichtung 2 auf dem Boden des Schachts 9 positioniert und mittels der Befestigungsmittel 13 an Wandabschnitten des Schachts 9 an der Innenwand 14 fixiert. Danach wird in die Ausrichtungseinrichtung 11 das Segment 20 eingebracht, an welches an einem Ende die Bohrkrone 5 angebracht ist. Die der Bohrkrone 5 abgewandte Seite des Segments 20 wird mit der Antriebseinrichtung 6 derart verbunden, dass das den Bohrerschaft bildende Segment 20 das Drehmoment zum Bohren auf die Bohrkrone 5 übertragen kann. Danach werden die Bohrkrone 5 und das erste Segment 20 durch den Dichtungsring 46 der Dichtungseinrichtung 40 hindurch bewegt und mit der Bohrung begonnen.
Während der Bohrung wird mittels der Spüleinrichtung 24 die Spülflüssigkeit in den ringförmigen Spalt 25 eingebracht (Fig. 2). Ein Spüldruck, mit dem die Spülflüssigkeit in den Spalt 25 eingebracht wird, wird derart mittels der Regelungseinrichtung 16 eingestellt, dass er größer ist als der Druck des Grundwassers, um das Grundwasser von dem bearbeiteten Bereich wegzudrücken. Die Spülflüssigkeit strömt zur Ausbildung des Schmierfilms entlang der Außenfläche des Bohrerschafts 4 und durch die Bohrkrone 5 hindurch. Sie kann ferner in Hohlräume 32, die im Erdboden 7 vorhanden sind, fließen, um diese zu füllen (Fig. 2, Pfeil 33). Nach Rückfluss durch das Segment 20 tritt die Spülflüssigkeit aus dem Inneren des Bohrerschafts 4 aus und wird zusammen mit dem beim Bohren aus dem Erdboden getrennten und zerkleinerten Material in die Sammeleinrichtung 31 transportiert.Subsequently, the drilling device 2 is positioned on the bottom of the shaft 9 and fixed by means of the fastening means 13 on wall portions of the shaft 9 on the inner wall 14. Thereafter, the segment 20 is introduced into the alignment device 11, to which the drill bit 5 is attached at one end. The side of the segment 20 facing away from the drill bit 5 is connected to the drive device 6 such that the segment 20 forming the drill bit shaft can transmit the torque for drilling to the drill bit 5. Thereafter, the drill bit 5 and the first segment 20 are moved through the sealing ring 46 of the sealing device 40 and started with the bore.
During the drilling, the rinsing liquid is introduced into the annular gap 25 by means of the rinsing device 24 (FIG. Fig. 2 ). A scavenging pressure, with which the rinsing liquid is introduced into the gap 25, is adjusted by means of the regulating device 16 such that it is greater than the pressure of the groundwater in order to push the groundwater away from the processed area. The rinsing liquid flows along the outer surface of the drill shank 4 and through the drill bit 5 to form the lubricating film. It may also flow into voids 32 present in the soil 7 to fill them ( Fig. 2 , Arrow 33). After refluxing through the segment 20, the flushing liquid exits the interior of the drill shank 4 and is transported into the collecting device 31 together with the material separated and comminuted during drilling from the ground.

Sobald so weit gebohrt worden ist, dass sich in der Bohrvorrichtung 2 ein weiteres Segment 21 anordnen lässt, wird die Bohrung gestoppt und das Segment 21 in die Bohrvorrichtung 2 eingesetzt und mit einem Ende mit dem der Bohrkrone 5 abgewandten Ende des Segments 20 verbunden. Das andere Ende des Segments 21 wird in der Antriebseinrichtung 6 fixiert. Danach wird der Bohrvorgang fortgesetzt und der Bohrerschaft 6 nach Bedarf in gleicher Weise sukzessive immer weiter verlängert.Once it has been drilled so far that another segment 21 can be arranged in the drilling device 2, the bore is stopped and the segment 21 inserted into the drilling device 2 and connected at one end to the end of the segment 20 facing away from the drill bit 5. The other end of the segment 21 becomes fixed in the drive device 6. Thereafter, the drilling process is continued and the drill shaft 6 as needed in the same way successively extended more and more.

Wenn die Bohrkrone 5 den anderen Schacht 10 erreicht, wird sie von dem Segment 20 abgenommen und das Ende des Segments 20 in dem Schacht befestigt sowie abgedichtet. Die Dichtungseinrichtung 40 und die Bohrvorrichtung 2 werden aus dem Schacht 9 entfernt und das letzte eingesetzte Segment 22 im Schacht 9 befestigt und das Segment 22 gegen die Innenwand des Schachts 9 abgedichtet. Der Bohrerschaft 4 verbleibt im Erdboden 7 und bildet die unterirdische Rohrleitung 41, die nun funktionstüchtig ist.When the drill bit 5 reaches the other shaft 10, it is removed from the segment 20 and the end of the segment 20 is secured in the shaft and sealed. The sealing device 40 and the drilling device 2 are removed from the shaft 9 and secured the last inserted segment 22 in the shaft 9 and the segment 22 sealed against the inner wall of the shaft 9. The drill shank 4 remains in the ground 7 and forms the underground pipe 41, which is now functional.

Es wird nun auf die Fig. 5 Bezug genommen, wo gleiche oder gleichwirkende Teile mit derselben Bezugszahl wie in Fig. 1 bis 4 bezeichnet sind und der betreffenden Bezugszahl jeweils der Buchstabe a beigefügt ist.It will now be on the Fig. 5 Reference is made to the same or equivalent parts with the same reference number as in Fig. 1 to 4 and the relevant reference number is accompanied by point (a).

Eine weitere erfindungsgemäße Bohrvorrichtung 2a, die sich insbesondere für die Bildung der unterirdischen Rohrleitung in weichen, instabilen und/oder porösen Böden eignet, unterscheidet sich von derjenigen nach den Fig. 1 bis 3 dadurch, dass durch das Innere eines Bohrerschafts 4a eine rohrförmige Lanze 35 geführt wird, die mit einem Endabschnitt 36 durch eine Bohrkrone 5a aus dem Bohrerschaft 4a vorsteht. Die Lanze 35 ist aus hier nicht gezeigten Segmenten gebildet, lässt sich sukzessive verlängern und im Bohrerschaft 4a hin und her bewegen, um sie bei Fortschreiten der Bohrung kontinuierlich vor der Bohrkrone 5a anordnen zu können.A further drilling device 2a according to the invention, which is suitable in particular for the formation of the underground pipeline in soft, unstable and / or porous soils, differs from that according to FIGS Fig. 1 to 3 in that a tubular lance 35 is guided through the interior of a drill shank 4a and projects with an end section 36 through a drill bit 5a out of the drill shank 4a. The lance 35 is formed from segments not shown here, can be successively extended and move in the drill shank 4a back and forth in order to arrange them as the bore progresses continuously in front of the drill bit 5a can.

Durch eine Austrittsöffnung 37 der Lanze 35 wird im Bereich vor einer auszuführenden Bohrung ein aushärtbares Material, z.B. schnellhärtender Beton, in den Erdboden 7a eingespritzt, um den Bereich im Boden 7a zu stabilisieren. Sobald das Material ausgehärtet ist, wird die Bohrung wie oben anhand der Fig. 1 - 3 beschrieben durchgeführt. Der zuvor durch das Material stabilisierte Bereich wird nun zwar durchbohrt und das dabei zuvor eingebrachte Material wieder entfernt, der Raum, der die Bohrung umgibt, aber ist durch das Material stabilisiert.
Je nach Bohrgeschwindigkeit und Anordnung der Lanze 35 im Verhältnis zur Bohrkrone 5a, insbesondere im Abstand zwischen der Spitze der Lanze 35 und der Bohrkrone 5a, erfolgt das Einspritzen des Materials in den Boden 7a und die darauffolgende Bohrung des Materials Schritt für Schritt oder kontinuierlich.Through an exit opening 37 of the lance 35, a curable material, eg fast-hardening concrete, is injected into the ground 7a in the region in front of a bore to be executed in order to stabilize the area in the bottom 7a. Once the material has cured, the hole is as above using the Fig. 1-3 described carried out. The previously stabilized by the material area is now indeed pierced and the previously introduced material removed again, the space surrounding the hole, but is stabilized by the material.
Depending on the drilling speed and arrangement of the lance 35 in relation to the drill bit 5a, in particular in the distance between the tip of the lance 35 and the drill bit 5a, the injection of the material into the bottom 7a and the subsequent drilling of the material takes place step by step or continuously.

Claims (15)

Verfahren zur Bildung einer unterirdischen Rohrleitung (41),
dadurch gekennzeichnet,
dass von einem Hohlraum (9) im Boden (7) aus eine Bohrung (8) mit horizontaler Richtungskomponente unter Verwendung eines Bohrwerkzeugs (3), das einen hohlen Bohrerschaft (4) umfasst, in den Boden (7) eingebracht wird, der Bohrerschaft (4) nach Einbringung des Bohrwerkzeugs (3) im Boden verbleibt, und die Rohrleitung (41) durch den Bohrerschaft (4) gebildet wird.Method of forming an underground pipeline (41),
characterized,
in that a bore (8) with a horizontal direction component is introduced into the soil (7) from a cavity (9) in the base (7) using a drilling tool (3) comprising a hollow drill shank (4), the drill shank ( 4) after insertion of the drilling tool (3) remains in the ground, and the pipe (41) through the drill shank (4) is formed. Verfahren nach Anspruch 1,
dadurch gekennzeichnet,
dass aus dem Boden (7) herausgetrenntes Material (42), welches sich in dem Bohrerschaft (4) anordnet, aus dem Bohrerschaft (4) ausgespült wird.Method according to claim 1,
characterized,
that material (42) separated from the bottom (7) which locates in the drill shank (4) is flushed out of the drill shank (4). Verfahren nach Anspruch 1 oder 2,
dadurch gekennzeichnet,
dass eine Spülflüssigkeit entlang der Außenseite des Bohrerschafts (4), und vorzugsweise bis zu einer Bohrkrone (5) und durch die Bohrkrone (5) hindurch in das Innere des Bohrerschafts (4), bewegt wird.Method according to claim 1 or 2,
characterized,
that a rinsing liquid is moved along the outside of the drill shank (4), and preferably to a drill bit (5) and through the drill bit (5) into the interior of the drill shank (4). Verfahren nach einem der Ansprüche 1 bis 3,
dadurch gekennzeichnet,
dass bei der Bohrung zwischen der Außenfläche des Bohrerschafts (4) und der inneren Mantelfläche der Bohrung (8) ein Spalt (25) gebildet wird, der die Außenfläche vorzugsweise vollständig umgibt.Method according to one of claims 1 to 3,
characterized,
in that a gap (25) which preferably completely surrounds the outer surface is formed in the bore between the outer surface of the drill shaft (4) and the inner circumferential surface of the bore (8). Verfahren nach Anspruch 4,
dadurch gekennzeichnet,
dass in dem Hohlraum (9), insbesondere an einer Innenwand (14) des Hohlraums (9), eine Dichtungseinrichtung (40) zum Dichten des Bohrerschafts (4) gegen die Innenwand (14) eingebracht wird.Method according to claim 4,
characterized,
that in the cavity (9), in particular on an inner wall (14) of the cavity (9), a sealing device (40) for sealing the drill shank (4) against the inner wall (14) is introduced. Verfahren nach einem der Ansprüche 2 bis 5,
dadurch gekennzeichnet,
das als die Spülflüssigkeit eine, vorzugsweise aufquellende, insbesondere Bentonit aufweisende, Flüssigkeit, verwendet wird.Method according to one of claims 2 to 5,
characterized
as the rinsing liquid, a preferably swelling, in particular bentonite-containing liquid, is used. Verfahren nach einem der Ansprüche 1 bis 6,
dadurch gekennzeichnet,
dass der Bohrerschaft (4) aus mindestens zwei hohlzylindrischen, an ihren Enden (23) miteinander verbindbaren Segmenten (20-22) gebildet wird.Method according to one of claims 1 to 6,
characterized,
in that the drill shank (4) is formed from at least two hollow cylindrical segments (20-22) which can be connected to each other at their ends (23). Verfahren nach einem der Ansprüche 1 bis 7,
dadurch gekennzeichnet,
dass die Bohrung (8) als Verbindungsbohrung zwischen zwei Hohlräumen (9,10), vorzugsweise zwei Schächten, oder als Sackloch ausgebildet wird.Method according to one of claims 1 to 7,
characterized,
that the bore (8) is formed as a connecting bore between two cavities (9,10), preferably two shafts, or as a blind hole. Verfahren nach einem der Ansprüche 1 bis 8,
dadurch gekennzeichnet,
dass durch eine Spritzeinrichtung (35), vorzugsweise eine in Richtung der Verbindungsbohrung (8a) angeordnete Lanze, ein aushärtendes Material (38), vorzugsweise Beton, in den Boden (7) eingebracht wird.Method according to one of claims 1 to 8,
characterized,
in that a hardening material (38), preferably concrete, is introduced into the bottom (7) by an injection device (35), preferably a lance arranged in the direction of the connection bore (8a). Vorrichtung zur Herstellung einer unterirdischen Rohrleitung (41),
dadurch gekennzeichnet,
dass die Vorrichtung dazu vorgesehen ist, von einem Hohlraum (9) im Boden (7) aus eine Bohrung (8) mit horizontaler Richtungskomponente unter Verwendung eines Bohrwerkzeugs (3), das einen hohlen Bohrerschaft (4) umfasst, in den Boden (7) einzubringen, wobei der Bohrerschaft (4) dazu vorgesehen ist, nach Einbringung des Bohrwerkzeugs (3) im Boden zu verbleiben, und die Rohrleitung (41) zu bilden.Apparatus for producing an underground pipeline (41),
characterized,
in that the device is intended to introduce into the bottom (7) from a cavity (9) in the bottom (7) a bore (8) with a horizontal directional component, using a drilling tool (3) comprising a hollow drill shank (4). the drill shank (4) is provided to remain in the ground after introduction of the drilling tool (3), and to form the pipeline (41). Vorrichtung nach Anspruch 10,
dadurch gekennzeichnet,
dass der Bohrerschaft (4) aus mindestens zwei an ihren Enden miteinander verbindbaren, hohlzylindrischen Segmenten (20-22) gebildet ist.Device according to claim 10,
characterized,
in that the drill shank (4) is formed from at least two hollow cylindrical segments (20-22) which can be connected to one another at their ends. Vorrichtung nach Anspruch 10 oder 11,
dadurch gekennzeichnet,
dass der Außendurchmesser einer Bohrkrone (5) des Bohrwerkzeugs (3) größer ist als der Außendurchmesser des Bohrerschafts (4) und/oder der Innendurchmesser der Bohrkrone (5) kleiner ist als der Innendurchmesser des Bohrerschafts (4).Device according to claim 10 or 11,
characterized,
in that the outside diameter of a drill bit (5) of the drilling tool (3) is greater than the outside diameter of the drill shank (4) and / or the inside diameter of the drill bit (5) is smaller than the inside diameter of the drill shank (4). Vorrichtung nach einem der Ansprüche 10 bis 12,
dadurch gekennzeichnet,
dass eine Einrichtung zum Halten (12), Bewegen (6) und Führen (11) des Bohrwerkzeugs (3) vorgesehen ist, die vorzugsweise zur Anordnung in dem Hohlraum (9) vorgesehen ist.Device according to one of claims 10 to 12,
characterized,
in that a device is provided for holding (12), moving (6) and guiding (11) the drilling tool (3), which is preferably provided for arrangement in the cavity (9). Vorrichtung nach einem der Ansprüche 10 bis 13,
dadurch gekennzeichnet,
dass eine Dichtungseinrichtung (40) zur Anordnung in dem Hohlraum (9), insbesondere an einer Innenwand (14) des Hohlraums (9), vorgesehen ist, und die Dichtungseinrichtung (40) vorzugsweise einen Befestigungsring, einen Klemmring und einen Dichtungsring umfasst.Device according to one of claims 10 to 13,
characterized,
that a sealing means (40) for disposition in the cavity (9), in particular on an inner wall (14) of the cavity (9) is provided, and the sealing device (40) preferably comprises a fastening ring, a clamping ring and a sealing ring. Vorrichtung nach einem der Ansprüche 10 bis 14,
dadurch gekennzeichnet,
dass eine Spüleinrichtung (24) zum Einbringen der Spülflüssigkeit in einen ringförmigen Spalt (25), der sich zwischen der Außenfläche des Bohrerschafts (4) und einer Innenwand der Bohrung bildet, vorgesehen ist.Device according to one of claims 10 to 14,
characterized,
in that a rinsing device (24) is provided for introducing the rinsing liquid into an annular gap (25) which forms between the outer surface of the drill shaft (4) and an inner wall of the bore.
EP16176198.6A 2015-07-01 2016-06-24 Method and device for forming an underground pipeline Not-in-force EP3112580B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102015110582.9A DE102015110582A1 (en) 2015-07-01 2015-07-01 Method and device for forming a subterranean pipeline

Publications (2)

Publication Number Publication Date
EP3112580A1 true EP3112580A1 (en) 2017-01-04
EP3112580B1 EP3112580B1 (en) 2018-04-18

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Application Number Title Priority Date Filing Date
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EP (1) EP3112580B1 (en)
DE (1) DE102015110582A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110485920A (en) * 2018-05-15 2019-11-22 长江岩土工程总公司（武汉） Inverted vertical hole aperture degree control method
EP3663504A1 (en) * 2018-12-04 2020-06-10 Werner Zimmer Earthworks method, earthworks device and earthworks installation

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19625073A1 (en) * 1996-06-22 1997-01-23 Thomas Dr Ing Daffner Digging=free system for laying underground drain seepage pipes
EP1818499A1 (en) * 2006-02-09 2007-08-15 Gonar Sp. Zo.o. Apparatus for simultaneously drilling and casing boreholes
WO2007143773A1 (en) * 2006-06-16 2007-12-21 Harrofam Pty Ltd Microtunnelling system and apparatus

Family Cites Families (2)

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Publication number Priority date Publication date Assignee Title
DE1219880B (en) * 1964-11-03 1966-06-30 August Goettker Erben Flachboh Rotary drive for the drill rods of a suction drill
DE3729560A1 (en) * 1987-09-04 1989-03-16 Mts Minitunnelsysteme Gmbh METHOD AND DEVICE FOR PRODUCING A PIPELINE IN A HOLE DESIGNED IN THE GROUND

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19625073A1 (en) * 1996-06-22 1997-01-23 Thomas Dr Ing Daffner Digging=free system for laying underground drain seepage pipes
EP1818499A1 (en) * 2006-02-09 2007-08-15 Gonar Sp. Zo.o. Apparatus for simultaneously drilling and casing boreholes
WO2007143773A1 (en) * 2006-06-16 2007-12-21 Harrofam Pty Ltd Microtunnelling system and apparatus

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110485920A (en) * 2018-05-15 2019-11-22 长江岩土工程总公司（武汉） Inverted vertical hole aperture degree control method
EP3663504A1 (en) * 2018-12-04 2020-06-10 Werner Zimmer Earthworks method, earthworks device and earthworks installation

Also Published As

Publication number Publication date
EP3112580B1 (en) 2018-04-18
DE102015110582A1 (en) 2017-01-05

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