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EP3400371B1 - Tunnelier et système d'évacuation par voie hydraulique de déblais de forage et système pour établir une pression stable d'un liquide de forage dans la zone d'une roue de coupe dudit tunnelier - Google Patents

Tunnelier et système d'évacuation par voie hydraulique de déblais de forage et système pour établir une pression stable d'un liquide de forage dans la zone d'une roue de coupe dudit tunnelier Download PDF

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Publication number
EP3400371B1
EP3400371B1 EP17701714.2A EP17701714A EP3400371B1 EP 3400371 B1 EP3400371 B1 EP 3400371B1 EP 17701714 A EP17701714 A EP 17701714A EP 3400371 B1 EP3400371 B1 EP 3400371B1
Authority
EP
European Patent Office
Prior art keywords
line
pump
boring
tunnel
cuttings
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP17701714.2A
Other languages
German (de)
English (en)
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EP3400371A1 (fr
Inventor
Tobias GERHARDT
Michael LUBBERGER
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Herrenknecht AG
Original Assignee
Herrenknecht AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from DE102016001001.0A external-priority patent/DE102016001001A1/de
Priority claimed from DE102016001032.0A external-priority patent/DE102016001032A1/de
Application filed by Herrenknecht AG filed Critical Herrenknecht AG
Priority to PL17701714T priority Critical patent/PL3400371T3/pl
Publication of EP3400371A1 publication Critical patent/EP3400371A1/fr
Application granted granted Critical
Publication of EP3400371B1 publication Critical patent/EP3400371B1/fr
Active legal-status Critical Current
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Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
    • E21B21/08—Controlling or monitoring pressure or flow of drilling fluid, e.g. automatic filling of boreholes, automatic control of bottom pressure
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
    • E21D9/06—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
    • E21D9/04—Driving tunnels or galleries through loose materials; Apparatus therefor not otherwise provided for
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
    • E21D9/06—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining
    • E21D9/08—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining with additional boring or cutting means other than the conventional cutting edge of the shield
    • E21D9/087—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining with additional boring or cutting means other than the conventional cutting edge of the shield with a rotary drilling-head cutting simultaneously the whole cross-section, i.e. full-face machines
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
    • E21D9/12—Devices for removing or hauling away excavated material or spoil; Working or loading platforms
    • E21D9/13—Devices for removing or hauling away excavated material or spoil; Working or loading platforms using hydraulic or pneumatic conveying means
    • 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
    • E21B7/046—Directional drilling horizontal drilling

Definitions

  • the invention relates to a tunnel boring device for creating a bore from a starting point to a target point in the ground along a predetermined drilling line by advancing the tunnel boring device for creating a tunnel or for laying a pipe in the ground with a drilling tool for loosening the ground, with at least one feed line for feeding a drilling fluid for the drilling tool, with at least one section arranged on the rear of the drilling tool for receiving the loosened soil in the form of cuttings, the area of the drilling tool and the at least one section being substantially filled with drilling fluid, and the drilling fluid in the area of the drilling tool and is provided within the at least one section with a pressure substantially corresponding to the pressure prevailing in the ground at the working face, with at least one pump for discharging the drilling fluid mixed with the cuttings from de m section, with at least one delivery line for removing the drilling fluid mixed with cuttings from the bore, which is connected to the delivery side of the at least one pump, and wherein the at least one pump is connected to the at least one section via at least one suction line.
  • tunnel boring machines When drilling holes from a starting point to a target point along a given drilling line, different types of tunnel boring machines are used depending on the soil or rock. Such tunnel boring machines are used when the tunnel boring machine is moved along the drilling line in the feed without pilot drilling or the like. The movement can take place either by pushing against an abutment in the tunnel already created or by pushing or pushing the pipe segments themselves outside of the created tunnel. Whole pipes can also be used in partially prepared form for the feed. Such a feed then takes place via a feed device, for example a pipe thruster or a Press frame when individual pipe segments are pressed into the ground. The soil is loosened with a drilling tool, for example a cutting wheel. The loosened cuttings are brought through the drilling tool into an area behind the cutting wheel and removed from there.
  • a feed device for example a pipe thruster or a Press frame when individual pipe segments are pressed into the ground.
  • the soil is loosened with a drilling tool, for example a cutting wheel. The loosened cuttings are brought through the drilling tool
  • the type of tunnel boring machine is selected depending on the geology. If the soil in which the tunnel is to be built consists essentially of non-stable mountains, a wet drilling method is used, in which a face support is used to stabilize the drilling and the surrounding soil. For this purpose, drilling fluid is introduced in the area of the cutting wheel and the space between the face and cutting wheel is filled with the drilling fluid. The drilling fluid, which is provided in the area of the drilling tool, is pressurized in order to counteract the pressure of the water in the mountains and thus to stabilize the face.
  • Tunnel boring machines are known for this purpose, in which the working face and the section arranged behind the drilling tool for receiving cuttings are filled with a drilling fluid as drilling fluid.
  • the drilling fluid is mostly a bentonite suspension.
  • a centrifugal pump the drilling fluid mixed with the cuttings is sucked out of the section via a suction line and brought to light through the tunnel behind the tunnel boring machine by a delivery line.
  • a feed line through which drilling fluid is also fed to the working face via a pump.
  • jet pumps which are arranged directly in the section behind the drilling tool.
  • the cuttings fall into a kind of funnel above the jet pump, from which the jet pump then sucks the cuttings.
  • the cuttings are then mixed in the mixing chamber of the jet pump with a propellant to drive the jet pump (propellant, usually identical to the drilling fluid) and then removed.
  • propellant usually identical to the drilling fluid
  • the fast jet of the propellant which is accelerated by a nozzle in the jet pump, pulls the cuttings out of the funnel. Drill cuttings and propellant mix in a mixing chamber of the jet pump and from there enter the delivery line via a mixing tube.
  • FIG. 1 Another possibility for suction in a jet pump is via an open tank system, in which the funnel is designed as an open basin in the suction area of the jet pump, in which drilling fluid is provided.
  • drilling fluid is supplied to the pool so that the pool does not fall dry despite being sucked in and removed by the jet pump.
  • the loosened cuttings and the bound dust fall into the pool and are sucked in by the jet pump.
  • Such a device for stable mountains is known from EP 0208816 B1 .
  • Such devices for stable mountains are also known JP H04-49274 Y2 , JP H09-132994 A , JP H02-32437 B , JP H07-6238 Y and JP 2001- 182486 A .
  • JP H07-6238 Y and JP 2001-182486 A each additionally disclose a tunnel boring machine, the use of which is possible both in the stable mountains with an open system described above in connection with a jet pump and alternatively also in a non-stable mountains which require a face support by a flushing liquid. It is provided here that the cuttings are removed in the stable mountains via a jet pump integrated in the section behind the drilling tool. In non-stable mountains, where an east chest support is used, the jet pump is closed instead and the pumping is carried out via a centrifugal pump arranged in the feed line JP 2001-182486A is arranged outside the tunnel, for example in the shaft or above ground. The centrifugal pump pumps the feed liquid into the drilling area and then the drilling fluid mixed with the cuttings via the delivery line from the drilling area. The use of a jet pump in wet operation is not shown.
  • JP H09-4375 A discloses the use of a jet pump when opening an incident shaft with a full-cut machine. The cuttings generated during the advance are sucked in at the cutting wheel and removed with a jet pump.
  • the open jet pump systems described furthermore disclose a separation of air which, due to the open system, is present in the drilling fluid mixed with cuttings.
  • a separation to which the jet pump delivers is already revealed after a short distance in the tunnel. If air is present in the delivery line, the cuttings in air bubbles can spontaneously settle in the delivery line and block them. Furthermore, this makes it possible to minimize the high pressure losses in the jet pump in that, since only small delivery lengths have to be bridged with the jet pump, the pressure in the drive line can be kept lower.
  • the cuttings are then removed from the separation tank using a centrifugal pump.
  • JP 2007 031947 A discloses a tunnel boring machine with a bulkhead to form a pressure chamber on the face of the tunnel.
  • the task is to provide a tunnel boring machine and a system for the hydraulic removal of cuttings, with which larger tunneling lengths can be achieved, especially for smaller diameters, in particular for diameters that cannot be walked on.
  • tunnel boring machines in which the working face and the section arranged behind the drilling tool for receiving cuttings are filled with a drilling fluid as drilling fluid.
  • the drilling fluid is mostly a bentonite suspension.
  • the drilling fluid With a feed pump, the drilling fluid is introduced into the area of the working face via a feed line, and the drilling fluid is placed under the pressure required to support the working face. It is important for the face support that the face support pressure is kept constant, especially to avoid blow-out over days if the pressure is too low, or if liquid pressure from the mountains is too high or the mountains flow uncontrollably into the borehole.
  • a tunnel boring device with face support in which the section for receiving cuttings behind the cutting wheel is divided with a wall into two spaces in fluid communication with one another.
  • the space facing the cutting wheel and the area of the working face are filled with drilling fluid.
  • the partially separated room is only partially filled with liquid. Compressed air is brought into this room as a kind of cushion. This serves as pressure equalization to keep the face pressure constant. In this way, the face pressure can be regulated very finely.
  • sensors are provided for monitoring the prevailing pressure.
  • drilling fluid mixed with the cuttings is sucked out of the section via a suction line by means of a feed pump and brought to light through the tunnel behind the tunnel boring machine by a delivery line.
  • treatment stages are already interposed in the tunnel or several feed pumps are used to guarantee the entire conveyance up to days. Centrifugal pumps are used as feed pumps.
  • the extraction of the cuttings and the extraction of drilling fluid from the section directly affects the face pressure. It must be ensured that at least as much feed liquid can be supplied as is removed.
  • the provision of the compressed air cushion also serves as pressure compensation here. However, it is correspondingly necessary to provide a compressed air supply.
  • a face support is also possible without the provision of compressed air in connection with the chamber division.
  • drivers of the tunnel boring device must respond to pressure changes in good time. For this, the speed of advance, the delivery pressures or delivery volumes and the feed pressures and feed quantities must be adequately monitored and regulated. This requires a great deal of experience and attention from machine operators.
  • Another object is to provide a tunnel boring machine and a system with which it is possible to keep the face pressure of the drilling fluid constant in a simpler manner.
  • the pump is a jet pump, which is connected to a drive line via which a propellant liquid is supplied to the jet pump, that the at least one pump is arranged outside the at least one section, and that in the at least one section a suction line, at least one shut-off valve is provided, via which the suction line can be closed.
  • a connecting line is provided between the feed line and suction line, which can preferably be closed with a shut-off valve.
  • the provision of the connecting line makes it possible to avoid fluctuations or large pressure peaks or pressure drops on the face and thus on the face support pressure when starting up the tunnel boring device, which can result from the abrupt closing and opening of the shut-off valves in the feed and / or suction line.
  • Another teaching of the invention provides that a shut-off valve is provided in the feed line. In this way, the area of the working face can be separated from the rest of the pipe system in a simple manner.
  • a further teaching of the invention provides that a control device, preferably a control valve, is provided in the drive line, from which the feed line leads, via which the volume flow of the drilling fluid in the feed line can be adjusted. This makes it possible to use only one line and one pump Supply the jet pump with propellant and at the same time supply the face with the feed liquid.
  • Another teaching of the invention provides that the pump is connected to a high-pressure pump via the drive line.
  • the provision of high pressures in the drive line makes it possible to convey the drilling fluid mixed with cuttings over greater distances through the delivery line.
  • the drilling fluid and / or the driving fluid is a bentonite suspension. This is processed in particular by a separation system in order to use it in the circuit.
  • the first object is achieved with regard to the system for the hydraulic removal of drill cuttings which have been released from a tunnel boring device, preferably according to a previously described tunnel boring device, the tunnel boring device being designed for wet drilling with face pressure control and having a section for receiving the released cuttings by a system with a feed line for supplying drilling fluid to the section, with a suction line for removing drilling fluid mixed with cuttings, with a jet pump for removing the drilling fluid mixed with cuttings, with a driving line connected to the driving line connection of the jet pump, the driving fluid with a driving pump is conveyed to the jet pump, with a connecting line between the feed line and the suction line, at least one shut-off element being provided in each case in the suction line, the feed line and the connecting line.
  • the further object is achieved with regard to the system for generating a stable fluid pressure of a drilling fluid in the area of a cutting wheel of a tunnel boring device designed for wet drilling, preferably according to a tunnel boring device described above, on a working face, which when drilling a hole from a starting point to a destination point in the Soil along a predetermined drilling line by advancing the tunnel boring device to create a tunnel or to lay a pipe, the tunnel boring device having a section for receiving the cuttings loosened by the cutting wheel behind the cutting wheel, a feed line for supplying drilling fluid to the working face, a suction line for conveying away of drilling fluid mixed with drilling cuttings from the section, a jet pump for removing the drilling fluid mixed with drilling cuttings, a drive line which is connected to the drive line connection of the jet pump, wherein the propellant is conveyed to the jet pump with a propellant pump, has a connecting line between the feed line and the suction line, at least one shut-off element being provided in the suction line, the feed line and
  • Fig. 1 shows a first embodiment of the tunnel boring device 10 according to the invention
  • Fig. 1 A shaft 40 is shown schematically. Furthermore, above-ground systems 30 as well as the borehole already created and the tunnel erected therein or the pipeline 50 incorporated therein are shown.
  • the tunnel boring device 10 comprises a schematically illustrated cutting wheel 11 as a boring tool.
  • a section 12 is provided behind the cutting wheel 11, in which the cuttings (not shown) released by the cutting wheel 11 collect.
  • the area of the cutting wheel 11 and the section 12 is filled with a drilling fluid (not shown) here, for example in the form of a bentonite flush.
  • the area of the cutting wheel 11 on the working face (not shown) and the section 12 are connected to a feed line 13.
  • the drilling fluid is supplied to the area of the cutting wheel 11 and the section 12 via the feed line 13.
  • Section 12 is also connected to a suction line 14.
  • the suction line 14 is connected to a suction connection 16 of a jet pump 15.
  • a shut-off valve 17 is provided in the suction line 14.
  • a delivery line 19 is provided at the delivery connection 18 of the jet pump 15.
  • the jet pump 15 has a drive line connection 21 for a drive line 20.
  • the feed line 13 extends from the surface systems 30 or from the shaft 40 through the pipeline that has already been introduced or the tunnel 50 that has already been created.
  • a feed pump 22 is provided in the feed line 13. This can be provided in the area of the surface systems 30 or in the shaft 40.
  • a drive pump 23, which is designed as a high-pressure pump, is connected to the drive line 20.
  • the delivery line 19 is connected to a separation system 31 for separating the drilling fluid from the cuttings.
  • the feed pump 22 and the drive pump 23 are supplied with drilling fluid from the separation system 31, which in turn then feed them via the feed line 13 or drive line 20 to the cutting wheel 11 or the jet pump 15.
  • the area of the cutting wheel 11 on the working face and the section 12 are supplied with drilling fluid via the feed pump 22 through the feed line 13.
  • the jet pump 15 is also supplied with drilling fluid by the drive pump 23 via the drive line 20.
  • the driving fluid enters the jet pump 15 through the driving line connection 21.
  • the propellant then passes to the propellant nozzle 24 and through it, accelerating it, into the mixing chamber 25.
  • the drilling fluid that fills the mixing chamber 25 is transported into a mixing tube 26.
  • the drilling fluid accelerated in this way entrains the drilling fluid located in the suction connection 16 and thus correspondingly also the drilling fluid which is located in the suction line 14 into the mixing chamber 25, as a result of which the jet pump 15 then pulls the drilling fluid and that out of the section 12 via the suction line 14 Sucks in cuttings.
  • the drilling fluid present as the driving fluid is then mixed with the liquid consisting of cuttings and drilling fluid from the suction line and transported into the delivery line 19 via the mixing tube 26.
  • the shut-off valve 17 in the suction line 14 is first closed.
  • the drilling fluid in the drive line 20 is then fed to the jet pump 15 via the drive pump 23.
  • the drilling fluid is transported into the delivery line and through this to the separation system 31.
  • a negative pressure is formed in the area of the suction connection 16 when the operation of the pump has settled. This causes that when the shut-off valve 17 is opened, the drilling fluid located in the suction line 14 is sucked directly into the pump 15.
  • the cuttings loosened when the tunnel boring device 10 is driven are transported into the section 12 and mixed therein with the drilling fluid. The mixture of cuttings and drilling fluid is sucked in accordingly through the suction line 14 by the jet pump 15.
  • the shut-off valve 17 in the suction line 14 is also first closed.
  • the feed pump 22 is started and drilling fluid is supplied to the area of the cutting wheel 11 until the desired pressure is applied to the working face.
  • the drilling fluid in the drive line 20 is then fed to the jet pump 15 via the drive pump 23.
  • the drilling fluid is transported into the delivery line and through this to the separation system 31.
  • a negative pressure is formed in the area of the suction connection 16 when the operation of the pump has settled. This causes that when the shut-off valve 17 is opened, the drilling fluid located in the suction line 14 is sucked directly into the pump 15.
  • the pressure on the working face is adjusted after opening the shut-off valve 17 by regulating the feed pump, if necessary. Subsequently, the cuttings loosened when the tunnel boring device 10 is driven are transported into the section 12 and mixed therein with the drilling fluid. The mixture of cuttings and drilling fluid is sucked in accordingly through the suction line 14 by the jet pump 15. This increases the density and the friction losses in the delivery line 19. At the same time, the suction power of the jet pump 15 drops when the pressure at the nozzle remains the same.
  • the delivery parameters can, for example, take place at the maximum in the delivery characteristic of the delivery pump, which is associated with energy losses during pumping, or the delivery parameters are set below the maximum but above the delivery parameters normally required (pressure and volume flow), so that there is adequate scope. If a limit value is then exceeded, a corresponding regulation is required.
  • the jet pump 15 continues to be operated until there is no more cuttings in the separation system 31. Then the shut-off valve 17 is closed, the delivery of the feed pump 22 is stopped, and then the delivery of the drive pump 23 is stopped, whereby the delivery of the drilling fluid through the delivery line 19 is then ended.
  • Fig. 3 and Fig. 4 show a second embodiment of a device according to the invention. This differs from the embodiment according to Fig. 1 , 2nd thereby, that the feed line 13 no longer extends to the shaft 40. Furthermore, no feed pump 22 is provided. Instead, only one drive pump 23 is provided, which is connected to the jet pump 15 by a drive line 20. In the area of the tunnel boring device 10, a control valve 27 is provided in the drive line 20, on which the feed line 13 taps. As before, the feed line 13 is connected to the region of the cutting wheel 11 and the section 12.
  • the drilling fluid When starting, the drilling fluid is supplied from the drive pump 23 to the jet pump 15 via the drive line 20 to the drive line connection 21.
  • the control valve 27 and the shut-off valve 17 are closed, so that the drilling fluid, which was conveyed from the drive pump 23 to the jet pump 15, is returned to the separation system 31 through the delivery line 19.
  • the control valve 27 is opened to such an extent that the required volume flow of drilling fluid, which is required in the area of the cutting wheel, for example in order to provide the desired working face pressure and is to be supplied to the section 12, is available.
  • the shutoff valve 17 is then opened, so that, as described above, the drilling fluid and cuttings are conveyed through the suction line 14.
  • the feed volume flow must be adjusted by adjusting / adjusting the control valve 27.
  • the area of the cutting wheel 11 and the section 12 is first subjected to drilling fluid until a separation system 31 does not produce any further cuttings.
  • the control valve 27 and the shut-off valve 17 are then closed, and the delivery of the drilling fluid by the drive pump 23 is set.
  • Fig. 5 , 6 show an alternative embodiment for executing the Fig. 1 , 2nd .
  • a shut-off valve 28 is provided in the region of section 12 in the feed line 13.
  • the shut-off valve 17 is arranged analogously to this.
  • a connecting line 32 is provided in a section 29 between the shut-off valve 17 and the suction connection 16, which has a shut-off valve 33.
  • the shut-off valves 17 and 28 are closed for starting and preparing for drilling.
  • the shut-off valve 33 in the connecting line is open.
  • the drive pump 23 and the feed pump 22 are switched on and the drilling fluid is transported through the feed line 13 and the connecting line 32 to the suction connection 16 of the jet pump 15.
  • the drilling fluid supplied via the drive line 20 and the drilling fluid supplied via the feed line 13 combine in the mixing chamber 25 and are transported away via the delivery line 19.
  • the two shut-off valves 17 and 28 are opened and the shut-off valve 33 in the connecting line 32 is closed, so that the jet pump 15 now draws in from the section 12 through the suction line 14, the area of the working face or the Cutting wheel 11 and section 12 is supplied with drilling fluid accordingly via the feed line 13.
  • the feed pump 22 feeds the mining area and the working face until a corresponding working face pressure prevails. Possibly. readjustment via the feed pump 22 is required.
  • the jet pump 15 now draws in from the section 12 through the suction line 14, the region of the working face or the cutting wheel 11 and the section 12 being fed back in accordingly via the feed line 13. Drilling and keeping the face pressure constant is done as previously described.
  • shutoff valves 17, 28, 33 are switched in the reverse order.
  • Fig. 7 , 8th shows an alternative embodiment Fig. 3 , 4th .
  • a corresponding connecting line 32 with shut-off valve 33 is also provided here analogously.
  • the feed line 13 also has a shut-off valve 28.
  • the shut-off valve 33 is open and the control valve 27 is regulated accordingly, the drive pump 23 is switched on, so that the necessary drive volume flow reaches the jet pump 15 via the drive line 20 at the drive line connection 21.
  • the feed volume flow set via the control valve 27 flows through the connecting line 22 to the suction connection 16 of the jet pump 15. If the system has adjusted, the shut-off valves 17, 28 are opened and the shut-off valve 33 of the connecting line 32 is closed.
  • the feed volume flow of the drilling fluid is transported to the cutting wheel 11 or section 12 and, at the same time, is conveyed from the section 12 correspondingly mixed with cuttings via the suction line 14 to the suction connection 16 of the jet pump 15.
  • the drilling fluid together with the cuttings enters the mixing chamber 25 of the jet pump 15, is mixed there with the volume flow from the drive line 20 and fed to the separation system 31 via the mixing tube 26 and the delivery line 19.
  • the termination of the drilling operation causes a reverse switching sequence of the shut-off valves 17, 28, 33.
  • the face pressure is kept constant as previously described.
  • jet pump as the feed pump, it is surprisingly possible to compensate for density fluctuations by taking up / sucking in / discharging cuttings with the drilling fluid within the characteristic values, so that the face pressure remains essentially constant despite changes in the rate of advance or the density of the cuttings.
  • the connecting line 32 and the provision of the shut-off valves 17, 28, 33 bring about a decisive improvement when starting up the tunnel boring device 10 in such a way that the jet pump 15 is already in a fully regulated operation and there is no vacuum at the suction connection 16. If the shut-off valves 17, 28, 33 are now switched, the direct transport of the drilling fluid into and out of the section 12 immediately begins. Since section 12 is already correspondingly filled with drilling fluid, this avoids a breakdown of the vacuum that prevails at shut-off valve 17 when no connecting line 32 is provided. The release of the vacuum by actuating the shut-off valve 17 causes a sudden increase in pressure in the area of the working face, which can be avoided accordingly by providing the connecting line 32.

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  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Environmental & Geological Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Earth Drilling (AREA)
  • Excavating Of Shafts Or Tunnels (AREA)

Claims (9)

  1. Tunnelier pour créer un trou de perçage dans le sol depuis un point de départ jusqu'à un point d'arrivée le long d'une ligne de perçage prédéfinie par avance du tunnelier (10) pour créer un tunnel ou pour poser un tuyau de canalisation (50) dans le sol avec un outil de perçage (11) pour ameublir le sol, avec au moins une conduite d'alimentation (13) pour alimenter un liquide de perçage à l'outil de perçage (11), avec au moins une section disposée au niveau du côté arrière de l'outil de perçage (11) pour recevoir le sol ameubli se présentant sous forme de déblais de perçage, la région de l'outil de perçage (11) et l'au moins une section étant sensiblement remplies avec du liquide de perçage, et le liquide de perçage dans la région de l'outil de perçage (11) et à l'intérieur de l'au moins une section étant à une pression correspondant essentiellement à la pression régnant dans le sol au niveau du front de taille, avec au moins une pompe (15) pour évacuer le liquide de perçage mélangé aux déblais de perçage hors de la section, avec au moins une conduite de refoulement (19) pour refouler le liquide de perçage mélangé aux déblais de perçage hors du trou de perçage, qui est raccordée au côté de refoulement de l'au moins une pompe (15) et l'au moins une pompe (15) étant raccordée à l'au moins une section par le biais d'au moins une conduite d'aspiration (14), la pompe (15) étant une pompe à jet qui est raccordée à une conduite d'entraînement (20), par le biais de laquelle un liquide d'entraînement de la pompe à jet (15) est acheminé, l'au moins une pompe (15) étant disposée à l'extérieur de l'au moins une section et au moins une vanne d'arrêt (17) étant prévue dans l'au moins une conduite d'aspiration (14), par le biais de laquelle la conduite d'aspiration (14) peut être fermée.
  2. Tunnelier selon la revendication 1, caractérisé en ce qu'entre la conduite d'alimentation (13) et la conduite d'aspiration (14) est prévue une conduite de raccordement (32).
  3. Tunnelier selon la revendication 2, caractérisé en ce que la conduite de raccordement (32) peut être fermée avec une vanne d'arrêt (33).
  4. Tunnelier selon l'une quelconque des revendications 1 à 3, caractérisé en ce qu'une vanne d'arrêt (28) est prévue dans la conduite d'alimentation (13).
  5. Tunnelier selon l'une quelconque des revendications 1 à 4, caractérisé en ce qu'un dispositif de réglage est prévu dans la conduite d'entraînement (20), depuis lequel part la conduite d'alimentation (13), par le biais duquel le débit volumique du liquide de perçage peut être ajusté dans la conduite d'alimentation (13).
  6. Tunnelier selon la revendication 5, caractérisé en ce que le dispositif de réglage est une vanne de réglage (27).
  7. Tunnelier selon l'une quelconque des revendications 1 à 6, caractérisé en ce que la pompe (15) est raccordée à une pompe haute pression (23) par le biais de la conduite d'entraînement (20).
  8. Tunnelier selon l'une quelconque des revendications 1 à 7, caractérisé en ce que le liquide de perçage et/ou le liquide d'entraînement est une suspension de bentonite.
  9. Tunnelier selon la revendication 8, caractérisé en ce que la suspension de bentonite peut être utilisée en circuit en tant que suspension de perçage traitée.
EP17701714.2A 2016-02-01 2017-01-27 Tunnelier et système d'évacuation par voie hydraulique de déblais de forage et système pour établir une pression stable d'un liquide de forage dans la zone d'une roue de coupe dudit tunnelier Active EP3400371B1 (fr)

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PL17701714T PL3400371T3 (pl) 2016-02-01 2017-01-27 Urządzenie do wiercenia tuneli i system hydraulicznego odprowadzania zwiercin oraz system wytwarzania stabilnego ciśnienia cieczy płuczki wiertniczej w obszarze tarczy skrawającej urządzenia do wiercenia tuneli

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DE102016001001.0A DE102016001001A1 (de) 2016-02-01 2016-02-01 Tunnelbohrvorrichtung und System zum Erzeugen eines stabilen Flüssigkeitsdruck einer Bohrflüssigkeit im Bereich eines Schneidrades einer Tunnelbohrvorrichtung
DE102016001032.0A DE102016001032A1 (de) 2016-02-01 2016-02-01 Tunnelbohrvorrichtung und System zum hydraulischen Abfördern von Bohrklein
PCT/EP2017/051816 WO2017133986A1 (fr) 2016-02-01 2017-01-27 Tunnelier et système d'évacuation par voie hydraulique de déblais de forage et système pour établir une pression stable d'un liquide de forage dans la zone d'une roue de coupe dudit tunnelier

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EP3400371B1 true EP3400371B1 (fr) 2020-04-08

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CN (1) CN108603406B (fr)
AU (1) AU2017214202B2 (fr)
CA (1) CA3010425C (fr)
DK (1) DK3400371T3 (fr)
ES (1) ES2805052T3 (fr)
PL (1) PL3400371T3 (fr)
PT (1) PT3400371T (fr)
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WO (1) WO2017133986A1 (fr)

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CN113617724B (zh) * 2021-08-02 2022-06-28 中铁工程装备集团有限公司 用于盾构机主驱动迷宫腔的清渣系统及其清渣方法

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Publication number Publication date
AU2017214202B2 (en) 2019-04-04
PT3400371T (pt) 2020-07-13
DK3400371T3 (da) 2020-07-13
US20190032430A1 (en) 2019-01-31
CN108603406B (zh) 2020-08-18
CA3010425C (fr) 2020-04-28
US11118454B2 (en) 2021-09-14
PL3400371T3 (pl) 2020-09-21
RU2689100C1 (ru) 2019-05-23
EP3400371A1 (fr) 2018-11-14
CN108603406A (zh) 2018-09-28
ES2805052T3 (es) 2021-02-10
CA3010425A1 (fr) 2017-08-10
AU2017214202A1 (en) 2018-08-02
WO2017133986A1 (fr) 2017-08-10

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