EP4080012A1 - Machine de construction pour le génie civil spécial - Google Patents

Machine de construction pour le génie civil spécial Download PDF

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Publication number
EP4080012A1
EP4080012A1 EP21169978.0A EP21169978A EP4080012A1 EP 4080012 A1 EP4080012 A1 EP 4080012A1 EP 21169978 A EP21169978 A EP 21169978A EP 4080012 A1 EP4080012 A1 EP 4080012A1
Authority
EP
European Patent Office
Prior art keywords
construction machine
machine according
carriage
auxiliary carriage
drive
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP21169978.0A
Other languages
German (de)
English (en)
Other versions
EP4080012B1 (fr
Inventor
Christian Heichel
Tobias Schmidt
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.)
ABI Anlagentechnik Baumaschinen Industriebedarf Maschinenfabrik und Vertriebsgesellschaft mbH
Original Assignee
ABI Anlagentechnik Baumaschinen Industriebedarf Maschinenfabrik und Vertriebsgesellschaft mbH
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
Application filed by ABI Anlagentechnik Baumaschinen Industriebedarf Maschinenfabrik und Vertriebsgesellschaft mbH filed Critical ABI Anlagentechnik Baumaschinen Industriebedarf Maschinenfabrik und Vertriebsgesellschaft mbH
Priority to EP21169978.0A priority Critical patent/EP4080012B1/fr
Priority to US17/692,323 priority patent/US20220341264A1/en
Publication of EP4080012A1 publication Critical patent/EP4080012A1/fr
Application granted granted Critical
Publication of EP4080012B1 publication Critical patent/EP4080012B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • E21B7/00—Special methods or apparatus for drilling
    • E21B7/003—Drilling with mechanical conveying means
    • E21B7/005—Drilling with mechanical conveying means with helical 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
    • E21B3/00—Rotary drilling
    • E21B3/02—Surface drives for rotary drilling
    • E21B3/022—Top drives
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D11/00—Methods or apparatus specially adapted for both placing and removing sheet pile bulkheads, piles, or mould-pipes
    • 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
    • E21B19/00—Handling rods, casings, tubes or the like outside the borehole, e.g. in the derrick; Apparatus for feeding the rods or cables
    • E21B19/08—Apparatus for feeding the rods or cables; Apparatus for increasing or decreasing the pressure on the drilling tool; Apparatus for counterbalancing the weight of the rods
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D7/00—Methods or apparatus for placing sheet pile bulkheads, piles, mouldpipes, or other moulds
    • E02D7/22—Placing by screwing down

Definitions

  • the invention relates to a construction machine for special civil engineering, with a leader on which a feed carriage is guided, which has a receptacle for a working device, in particular a drilling or piling device, according to the preamble of patent claim 1.
  • Construction machines of the above type are used to hold, in particular, a drilling or piling device.
  • a drilling device picked up by the feed carriage is usually used in such a way that the drill pipe and the auger are first connected to the drill drive and brought into position.
  • the drill pipe is sunk in advance.
  • the size of the lead depends on the respective soil conditions. In heavy soils, this is minimal, as the resistance is reduced by freeing the drill pipe from the cuttings.
  • the auger is attached at the end of a Kelly drill rod, also known as a Kelly rod.
  • the Kelly bar consists of several boring bars inserted into each other, which are provided with driver strips for torque transmission.
  • the auger is screwed into the ground inside the pipe, filling its helix with cuttings. If the auger is filled with cuttings, it is pulled out of the drill pipe and the cuttings are thrown off. For this purpose, the auger is repeatedly accelerated and then stopped. Once the first section of pipe has been sunk, another piece of pipe is coupled to the drill pipe. In order to reach the required drilling depth, the Kelly bar is telescoped. This process is repeated until the desired drilling depth is reached. In this way, boreholes can be created that are many times deeper than the length of the leader. Kelly drilling is characterized by various discontinuous work steps. For example, a section of pipe has to be picked up manually again and again, or two pipes have to be placed on top of each other.
  • a piling device picked up by the attachment of the feed carriage of the construction machine also requires such a high level of cognitive performance on the part of the operator. For example, when erecting a sheet piling, corresponding sheet piling several meters long must be picked up by the piling device in a defined position in order to insert them into the subsoil in a defined manner. Here, too, it is difficult to support the operator with assistance systems.
  • the invention aims to remedy the situation.
  • the invention is based on the object of providing a construction machine for special foundation engineering for receiving a drilling or piling device, which enables simplified operation. According to the invention, this object is achieved by a construction machine having the features of the characterizing part of claim 1.
  • a construction machine for special civil engineering for receiving a drilling or piling device, which enables simplified operation. Due to the fact that an auxiliary carriage is arranged on the leader, which can be moved along the leader via a second drive, with at least one actuator and/or a sensor being arranged on the auxiliary carriage, a provided sensory or actuator support of the operator.
  • the auxiliary carriage is preferably guided on the leader.
  • an auxiliary carriage is to be understood as a carriage that can be moved along the leader, which does not directly contribute to the drilling or ramming process and in particular does not apply any feed force to a working device.
  • the auxiliary carriage is thus distinguished from the feed carriage, which takes up a working device and applies a feed force to it during the work process.
  • an actuator is to be understood as a component which, when a signal is applied, executes a defined movement relative to the auxiliary carriage on which the component is arranged.
  • the signal can be an electrical, hydraulic, pneumatic or mechanical signal.
  • the defined movement can be, for example, extending or positioning an arm.
  • the auxiliary carriage can be moved relative to the feed carriage. This enables positioning of the auxiliary carriage with the at least one actuator and/or sensor arranged on it relative to the working device.
  • the auxiliary carriage can preferably be moved independently of the feed carriage.
  • the second drive is connected to a cable winch which can be driven via the second drive and whose cable is connected to the auxiliary carriage.
  • the auxiliary carriage is provided with at least one, preferably two, winches whose cables are connected to the feed carriage, as a result of which the auxiliary carriage is positioned independently of the feed carriage.
  • the second drive is formed by an electric motor. This is a very well controllable and also cheaper Arranged drive, which allows exact positioning of the auxiliary carriage. In addition, a simple connection of the auxiliary carriage to the construction machine is made possible, since no hydraulic lines and supply valves have to be provided.
  • the second drive and the cable winch are preferably arranged on the feed carriage.
  • At least one imaging sensor and/or at least one distance sensor is arranged on the auxiliary carriage. This achieves a continuous detection of the position of a tool or a piling, in particular a pipe or a sheet pile.
  • two distance sensors are arranged, which are set at a defined angle to the auxiliary carriage and form a first sensor unit.
  • a second sensor unit is preferably arranged on the auxiliary carriage at a distance from the first sensor unit, which second sensor unit is in turn formed by two distance sensors set at a defined angle to the auxiliary carriage.
  • At least one sensor is connected to the machine controller and/or the operator terminal of the construction machine. This makes it possible to use the recorded relative position of a received pipe or a received sheet piling for assisted or automatic corrections of the position by the operator or by the machine control.
  • the output signals of the at least one sensor can be used in a position control that controls both the kinematics, via which the leader is connected to the carrier device, and the feed carriage in order to cause a pipe to move parallel to the ground.
  • An imaging sensor arranged on the auxiliary carriage is advantageously connected to a monitor. This allows the operator to visually detect the relative position of a pipe or sheet pile that has been picked up.
  • the auxiliary carriage has at least one actuator, which includes a pivotable and/or extendable arm, which can be controlled via a control unit arranged on the construction machine.
  • a control unit arranged on the construction machine.
  • the arranged control unit can be connected, for example, to an operating lever that can be actuated by the operator.
  • Automatic activation of the arm by the controller is also possible, which for this purpose is preferably connected to the sensors arranged on the auxiliary carriage.
  • the pivotable and/or extendable arm can be connected to a drive, in particular to an electric motor, which is connected to the controller and via which the arm can be moved.
  • a manipulator in particular a gripper and/or a screwing tool and/or a drill flute cleaning tool, is arranged on the arm of at least one actuator. This enables a defined manipulation of the object picked up by the working device.
  • the arm is connected to a hydraulically or electrically operated pivoting motor or cylinder, via which it can be pivoted.
  • the swivel motor or the cylinder is self-locking. This ensures a stable position of the arm in a pivoted position.
  • a reading device and/or a writing device for contactless data acquisition and/or data storage is arranged on the auxiliary carriage.
  • data attached to the object to be picked up by the working device for example in the form of a barcode, an RFID chip or some other type of data, can be recorded in a contactless manner readable identifier achieved.
  • operating times can be stored on an arranged RFID chip via a writing device. This allows tools and pipes to be recorded and provided with a work history.
  • the construction machine comprises a control device which is connected to the drive of the feed carriage and the drive of the auxiliary carriage and which comprises a memory module in which at least one movement sequence of the auxiliary carriage and its actuators is stored.
  • control device is connected to at least one sensor of the auxiliary carriage and set up in such a way that the auxiliary carriage and/or at least one actuator is moved as a function of the detected sensor signals.
  • algorithms can be stored in the control device which, depending on the positions of the auger or a pipe detected by the sensors, initiate a target position, for example the start of the drill pipe or a connection position with a drill pipe to be picked up, a movement of the auxiliary carriage or an extension of a drill pipe cleaning device .
  • the construction machine selected as an exemplary embodiment is designed as a rotary drilling rig and consists essentially of a carrier device 1 that is connected in a known manner via kinematics to a leader 2, on which a feed carriage 3 is movably arranged, to which a drilling device 5 is attached .
  • the basic structure of such a rotary drilling rig is well known and, for example, in the DE 195 14 288 A1 described.
  • the drilling device 5 comprises a drilling drive 51 which is attached to the feed carriage 3 and which has a pressure pipe 52 .
  • the drilling drive 51 accommodates a Kelly rod 53 which protrudes through the pressure pipe 52 and which can be rotated via the drilling drive 51 .
  • An auger 54 is fastened to the Kelly bar 53 at the end.
  • An auxiliary carriage 4 is guided to the leader 2 at a distance from the feed carriage 3 .
  • Two cables 41 are attached to the auxiliary carriage 4, which are taken from a cable winch--not shown--which is connected to an electric motor--not shown--via which the cable winch can be driven.
  • the cable winch and electric motor are arranged in a drive housing 31, which is fastened to the feed carriage 3 (cf. Figures 7 and 8 ). By winding or unwinding the ropes 41, a movement of the auxiliary carriage 4 guided on the leader 2 is effected independently of the feed carriage 3 relative thereto.
  • the electric motor is fed by an accumulator, which is also arranged in the drive housing 31 in the exemplary embodiment.
  • Two sensor units 42 are arranged on the auxiliary carriage 4 at a distance from one another in the longitudinal direction of the leader 2, each of which comprises two distance sensors 43 arranged at a distance in the transverse direction of the auxiliary carriage 4, as a result of which four distance sensors 43 are arranged, which are positioned at the corners of an imaginary rectangle.
  • the distance sensors 43 are in the form of ultrasonic sensors.
  • other, preferably non-contact, distance sensors can also be arranged, such as optical, inductive or capacitive sensors. Touching distance sensors such as feeler levers or measuring pins can also be used.
  • Four identical distance sensors 43 are arranged in the exemplary embodiment. Different sensors can also be arranged, with the same sensors preferably being used in pairs.
  • a sensor unit 42 is advantageously equipped with the same sensors.
  • a sensor unit can also have three or more sensors. Not all sensor units have to have the same number of sensors. Both distance sensors and imaging sensors can be arranged.
  • the distance sensors 43 are connected via electrical lines to a computer unit (not shown) which is arranged in the drive housing 31 and is supplied with power via the accumulator.
  • the lines serve both to supply power to the distance sensors 43 and to transmit signals from the distance sensors 43 to the computer unit.
  • the lines are integrated in the cables 41 in the exemplary embodiment.
  • the computer unit has a wireless transmission and reception unit, via which it is connected to a control device arranged in the carrier device. In the arrangement of an imaging sensor, the computer unit is wireless Transmitting and receiving unit also connected to a monitor, which is used to graphically display the transmitted image signals.
  • the computer unit (not shown) arranged in the drive housing 31 can also be used to control the electric motor to which it is connected.
  • the electric motor can be controlled by the control unit arranged in the carrier device 1 via a wireless initiation of the computer unit.
  • the electric motor can also be connected directly - wirelessly or via lines - to the controller of the carrier device 1 or to a separate control unit.
  • the arrangement of a computer unit in the drive housing 31 is therefore not absolutely necessary.
  • the arrangement of the cable winch and/or the electric motor in a drive housing 31 is also not absolutely necessary. These can also be attached directly to the feed carriage. It is also possible to arrange the cable winch on the auxiliary carriage 4 , with the cable 41 picked up by the cable winch being fastened to the feed carriage 3 .
  • FIGs 1 to 3 the construction machine designed as a rotary drilling rig is shown in three states when receiving a drill pipe 6 for connection to the pressure pipe 52 of the drill drive 51 .
  • the pressure pipe 52 of the drill drive 51 is located outside the borehole axis.
  • the auxiliary carriage 4 with the sensor units 42 arranged on it is positioned at the level of the connection point at the end of the pressure pipe 52 .
  • the distance from the pressure pipe 52 detected by the distance sensors 43 of the upper sensor unit 42 is significantly smaller here than the distance from the drill pipe 6 detected by the distance sensors 43 of the lower sensor unit 42.
  • the horizontal offset from the pressure pipe 52 to the drill pipe 6 is also detected by the distance sensors 43 detected.
  • the signals from the distance sensors 43 are routed to the controller in the carrier device 1 via the computer unit. Based on the continuously supplied sensor signals the controller calculates the necessary movement sequences for positioning the pressure pipe 52 on the drill pipe 6.
  • the leader 2 is positioned with the drill drive 51 attached to the feed carriage 3 in such a way that the pressure pipe 52 is located in the borehole axis.
  • the pressure pipe 52 was brought closer to the drill pipe 6 .
  • the auxiliary carriage 4 with the sensor units 42 arranged on it is again positioned at the level of the connection point.
  • the distance from the pressure pipe 52 detected by the distance sensors 43 of the upper sensor unit 42 now corresponds to the distance from the drill pipe 6 detected by the distance sensors 43 of the lower sensor unit 42.
  • the pressure pipe 52 can be moved in this position by moving the feed carriage 3 along the leader 2 on the drill pipe 6 are positioned as in figure 3 is shown.
  • This process can be visually monitored by the operator via an optionally additionally arranged imaging sensor, such as a camera, which is connected to a monitor arranged in the cabin of the carrier device 1 .
  • an actuator in the form of an actuating arm or a gripper can be arranged on the auxiliary carriage 4, via which the bolts can be inserted—or can be removed in the course of disassembly.
  • This actuator can be operated either remotely by the operator from the cabin of the carrier device 1 or also automatically via a control device set up for this purpose.
  • an image sensor in particular in the form of a camera, can be arranged on the auxiliary carriage 4, which is connected to a monitor arranged in the cabin of the carrier device 1 .
  • FIG. 4 to 6 1 shows in an analogous manner the receiving of a second drill pipe 61 which is received by the first drill pipe 6.
  • the auxiliary carriage 4 with the sensor units 42 arranged on it was moved relative to the feed carriage 3 along the leader until it is positioned at the level of the connection point at the end of the first drill pipe 6 fastened to the pressure pipe 52 .
  • an actuator in the form of a drilling flute cleaning tool 7 is arranged on the auxiliary carriage.
  • the drill flute cleaning tool 7 comprises a cylindrical cleaning arm 71 to which a scraping angle 72 is attached and which is held by a sleeve 73 of a holding device 74 which is pivotably mounted on the auxiliary carriage 4 via an axis 75 .
  • the cleaning arm 71 does not necessarily have to be of cylindrical design—it can also be of cuboid or other suitable design.
  • the cleaning arm does not necessarily have to be held by a holder. It can also be attached directly to the holding device 74 .
  • the pivot axis of the cleaning arm 71 is directed transversely to the direction of travel of the auxiliary carriage 4 .
  • the holding device 74 is connected to a pivoting drive, via which it can be pivoted about the axis 75 .
  • the swivel drive is formed by a hydraulically operated high-helix swivel motor.
  • an electric motor can also be arranged.
  • the swivel drive should be self-locking.
  • a hydraulic swivel motor in this case, for example, a high-helix swivel motor—this can be implemented by a load-holding valve.
  • the cleaning arm 71 is pivoted approximately orthogonally to the guide carriage 4 and is shown in this position in engagement with the drill helix of the auger 54.
  • the cleaning arm 71 rests with the scraping angle 72 on the upper end of the drill helix.
  • the scraper 72 slides along the drill flute, thereby removing soil material adhering to the auger 54 .
  • the cleaning arm 71 has completely passed through the spiral drill and the auger has been pulled out of the drill pipe 6 past the cleaning arm 71 .
  • the cleaning arm 71 is pivoted out of the working position into the rest position, as in figure 11 is shown. In this position, the cleaning arm 71 is pivoted downwards and positioned parallel to the guide carriage 4 .

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Geology (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Paleontology (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Earth Drilling (AREA)
EP21169978.0A 2021-04-22 2021-04-22 Machine de construction pour le génie civil spécial Active EP4080012B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP21169978.0A EP4080012B1 (fr) 2021-04-22 2021-04-22 Machine de construction pour le génie civil spécial
US17/692,323 US20220341264A1 (en) 2021-04-22 2022-03-11 Construction machine for special civil engineering

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP21169978.0A EP4080012B1 (fr) 2021-04-22 2021-04-22 Machine de construction pour le génie civil spécial

Publications (2)

Publication Number Publication Date
EP4080012A1 true EP4080012A1 (fr) 2022-10-26
EP4080012B1 EP4080012B1 (fr) 2024-05-22

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EP21169978.0A Active EP4080012B1 (fr) 2021-04-22 2021-04-22 Machine de construction pour le génie civil spécial

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US (1) US20220341264A1 (fr)
EP (1) EP4080012B1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3951128B1 (fr) * 2020-08-05 2023-06-07 BAUER Maschinen GmbH Dispositif de dégagement d'un espace intermédiaire hélicoïdal d'une tarière et procédé pour créer un alésage

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19514288A1 (de) 1995-04-23 1996-10-24 Delmag Maschinenfabrik Bohrgerät
US5944452A (en) * 1998-03-30 1999-08-31 Reinert, Sr.; Gary L. Heavy duty foundation installation apparatus and method
DE10206646C1 (de) * 2002-02-15 2003-07-24 Prime Drilling Gmbh Horizontalbohranlage
DE102007043045A1 (de) * 2007-09-11 2009-03-12 B+N Geothermie Gmbh Mobile Bohranlage
US8646546B2 (en) * 2009-12-22 2014-02-11 Soilmec S.P.A. System for handling equipments for the drilling of the ground
US9540887B2 (en) * 2012-12-28 2017-01-10 Soilmec S.P.A. Auger cleaning device for removing debris from a helical drilling tool, drilling machine provided with said cleaning device and use of said drilling machine
EP1983149B1 (fr) * 2007-04-16 2017-05-31 Liebherr-Werk Nenzing GmbH Mât
US10344586B2 (en) * 2015-04-17 2019-07-09 Bauer Maschinen Gmbh Drilling apparatus for producing a cased bore and method for operating a drilling apparatus
RU2717550C1 (ru) * 2018-12-28 2020-03-24 Федеральное государственное бюджетное образовательное учреждение высшего образования "Саратовский государственный технический университет имени Гагарина Ю.А." (СГТУ имени Гагарина Ю.А.) Оборудование для возведения буронабивных свай

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BE670646A (fr) * 1965-10-07
DE4113422C3 (de) * 1991-04-25 1998-06-10 Klemm Bohrtech Erdbohrgerät
DE9110495U1 (fr) * 1991-08-24 1991-10-17 Ing. G. Klemm, Bohrtechnik Gmbh, 5962 Drolshagen, De
NO301435B1 (no) * 1995-10-20 1997-10-27 Tom Toralv Roeynestad Anordning ved borerigg med boretårn
FR3026754B1 (fr) * 2014-10-01 2016-12-02 Soletanche Freyssinet Machine et procede pour la realisation de colonnes dans un sol
US20180313165A1 (en) * 2017-03-03 2018-11-01 Pro-Dig Gi, Llc Masted drill rig with system for applying push and/or pull force to a tool
IT201800006771A1 (it) * 2018-06-28 2019-12-28 Macchina di perforazione dotata di un sistema di rilevamento di almeno una posizione di bloccaggio di una testa rotante su una prolunga di estensione di una batteria di perforazione e metodo di rilevamento di detta almeno una posizione di bloccaggio.
US10907318B2 (en) * 2018-10-19 2021-02-02 Ojjo, Inc. Systems, methods, and machines for autonomously driving foundation components

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19514288A1 (de) 1995-04-23 1996-10-24 Delmag Maschinenfabrik Bohrgerät
US5944452A (en) * 1998-03-30 1999-08-31 Reinert, Sr.; Gary L. Heavy duty foundation installation apparatus and method
DE10206646C1 (de) * 2002-02-15 2003-07-24 Prime Drilling Gmbh Horizontalbohranlage
EP1983149B1 (fr) * 2007-04-16 2017-05-31 Liebherr-Werk Nenzing GmbH Mât
DE102007043045A1 (de) * 2007-09-11 2009-03-12 B+N Geothermie Gmbh Mobile Bohranlage
US8646546B2 (en) * 2009-12-22 2014-02-11 Soilmec S.P.A. System for handling equipments for the drilling of the ground
US9540887B2 (en) * 2012-12-28 2017-01-10 Soilmec S.P.A. Auger cleaning device for removing debris from a helical drilling tool, drilling machine provided with said cleaning device and use of said drilling machine
US10344586B2 (en) * 2015-04-17 2019-07-09 Bauer Maschinen Gmbh Drilling apparatus for producing a cased bore and method for operating a drilling apparatus
RU2717550C1 (ru) * 2018-12-28 2020-03-24 Федеральное государственное бюджетное образовательное учреждение высшего образования "Саратовский государственный технический университет имени Гагарина Ю.А." (СГТУ имени Гагарина Ю.А.) Оборудование для возведения буронабивных свай

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Publication number Publication date
US20220341264A1 (en) 2022-10-27
EP4080012B1 (fr) 2024-05-22

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