EP4183974A1 - Système de tige creuse assisté par capteur - Google Patents

Système de tige creuse assisté par capteur Download PDF

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Publication number
EP4183974A1
EP4183974A1 EP22207596.2A EP22207596A EP4183974A1 EP 4183974 A1 EP4183974 A1 EP 4183974A1 EP 22207596 A EP22207596 A EP 22207596A EP 4183974 A1 EP4183974 A1 EP 4183974A1
Authority
EP
European Patent Office
Prior art keywords
hollow rod
sensor
rod system
measuring
tube
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.)
Pending
Application number
EP22207596.2A
Other languages
German (de)
English (en)
Inventor
Wolfgang Dolsak
Dominik DENDL
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.)
DSI Underground Austria GmbH
Original Assignee
DSI Underground Austria GmbH
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 DSI Underground Austria GmbH filed Critical DSI Underground Austria GmbH
Publication of EP4183974A1 publication Critical patent/EP4183974A1/fr
Pending 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
    • E21B47/00—Survey of boreholes or wells
    • E21B47/01—Devices for supporting measuring instruments on drill bits, pipes, rods or wirelines; Protecting measuring instruments in boreholes against heat, shock, pressure or the like
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D21/00—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D20/00—Setting anchoring-bolts
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D21/00—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection
    • E21D21/0026—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection characterised by constructional features of the bolts
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D21/00—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection
    • E21D21/0093—Accessories
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D21/00—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection
    • E21D21/02—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection having means for indicating tension

Definitions

  • the present invention relates to a sensor-supported hollow rod system consisting of at least one hollow rod, optionally at least one coupling element and a nut with a retaining plate and at least one condition monitoring system, comprising at least one measuring element, a transmission unit and a communication interface containing an evaluation unit.
  • Hollow rod systems in particular self-drilling hollow rod systems, in which a hollow rod is inserted into soil or rock material with a drill bit, whether for civil engineering, tunnel construction or the like, have been known for many years.
  • the so-called self-drilling systems have proven to be particularly efficient in this respect, in which the support element or the hollow rod is connected to a drill bit in such a way that on the one hand it serves to form the borehole and on the other hand, after the borehole has been formed, the hollow rod inside the borehole, for example using cement milk is fixed and the drill bit remains as a so-called lost drill bit in the mountain or in the ground.
  • Such systems are an essential part of modern tunneling, with which it is possible to provide both a working face and a radial or anticipatory anchoring, so that unintentional rock fractures can be prevented with certainty.
  • Such hollow rod systems are usually introduced into the mountain or the ground by means of so-called rotary percussion drilling or rotating drilling, in which rotary percussion drilling the drill head together with the hollow rod is first withdrawn from the working face, then rotated further by a certain angle, for example a quarter circle and again with Impact energy is applied to be driven further into the mountain or ground.
  • measuring elements there are a number of solutions for introducing measuring elements into soil or rock material, in which first a hole, in particular a borehole, is formed, the drill is pulled out of the hole and then, without excessive pressure being applied or impact energy on the rods applying a rod, the measuring element or the rod carrying the measuring elements or the tube is introduced into the mountain or soil.
  • the measuring elements can be placed both on the outside of the rod and on the inside, since they are in no way subjected to mechanical stresses comparable to those encountered when a rod or anchor is driven into the mountain.
  • Another problem with the direct Insertion of measuring elements in the mountain or soil by rotary percussion drilling is that usually inserted rods or anchors only have a certain prefabricated length and after this length has been introduced into the mountain, a coupling with a second rod or tubular element must be done via a socket and drilling is continued until a sufficient depth of the inserted rod or anchor is reached. If a hollow rod system, which is provided with measuring elements on the inside or outside, is to be extended by a further rod, the difficulty arises that measuring elements applied or arranged on the outer or inner surface can be compared with the measuring elements already installed in the mountain or Sensors must be connected that a safe and reliable measurement of the respective desired measurand can be achieved.
  • An example of such a hollow rod with a sensor system can be, for example WO 2016/076788 A1 be removed, in which a hollow rod is inserted into a borehole, inside which an elongated, electrically conductive sensor is introduced and is connected to an observation device or monitor via the anchoring end. With such a device, the condition of the hollow rod itself should be able to be checked.
  • a rock anchor with a sensor for measuring the mechanical stress can be removed.
  • a bar-shaped element such as a reinforcement bar or the like, is inserted into a prefabricated borehole, on which bar-shaped element a conductor track is applied. With such a device, the mechanical stress on the fastening section of the rod-shaped element should be able to be measured.
  • the present invention now aims to provide a self-drilling hollow rod system with which it is possible to form the borehole in one step and at the same time insert a rod-shaped element, in particular a hollow rod, which is equipped with the appropriate sensors.
  • the sensor-supported hollow rod system is essentially characterized in that the hollow rod system is designed as a self-drilling system with a lost drill bit facing the inside of a borehole and that each hollow rod is designed as at least a two-layer tube, comprising an inner measuring tube and an outer jacket tube , is trained.
  • the sensor-supported hollow rod system is designed as a self-drilling system with a lost drill bit facing the inside of a borehole, it is possible in one and the same work step to form the borehole, whether in soil or rock material, as a deep hole or, for example, as a pipe umbrella and the corresponding ones to introduce rod-shaped elements such as anchors, soil nails or micropiles into a borehole to be formed and at the same time and taking into account the fact that the hollow rod is designed as at least a two-layer tube, to introduce the necessary measuring elements into the borehole to be formed.
  • the hollow rod which is designed as at least a two-layer tube, has a jacket tube on its outside, which jacket tube is designed in such a way that impact stresses, such as those encountered in rotary percussion drilling or rotary drilling, are exerted on the piles or anchors to be driven into the mountain are, can withstand and furthermore an inner jacket tube is provided on or on which the sensitive measuring elements are arranged or on which they are applied.
  • the outer jacket tube is essentially impacted and the inner measuring tube, which is usually thinner or has a smaller cross-section, is not impacted or only slightly impacted.
  • the design can also be such that the inner measuring tube has a slightly smaller longitudinal extent than the casing tube, so that the sensitive measuring systems cannot be directly impacted in the event of an impact.
  • any tubular or rod-shaped elements are formed with a predetermined length and that in the case of a deeper drilling usually several such hollow rod elements or rod-shaped elements together need to be connected.
  • Such a connection is usually achieved by means of a pipe sleeve or a direct screw connection, in that one of the tubular elements has a female thread and the other has a female thread.
  • the invention is developed in such a way that two of a plurality of casing tubes are connected via a coupling element, in particular a pipe socket, and that at least in the area of a connection of measuring tubes or Measuring tube sections, an electrically conductive connecting element is provided.
  • a coupling element in particular a pipe socket
  • an electrically conductive connecting element is provided in the area of the connection of measuring tubes or measuring tube sections, since measurements in the ground or mountain usually take place via electrical conductivity, since opto-chemical sensors, for example, are not suitable for such purposes.
  • Such a connection can be formed, for example, by arranging electrically conductive washers, conductive pressure elements in between, which are subjected to pressure when the two pipes are pulled together and thus reliably conduct the electric current, and the like.
  • the invention is further developed in that the at least one measuring tube consists of an electrically conductive steel or plastic tube is formed and that the measuring tube is optionally additionally provided with fiber optic sensors and / or printed sensors.
  • the invention is further developed such that the at least one measuring tube is connected to the associated jacket tube in a non-positive and positive manner.
  • a non-positive and positive connection is achieved, for example, by rolling or rolling, in particular cold rolling, with which methods stretching and compressing deformations are applied to the rod-shaped element, whereby a secure and reliable connection of the two tubular elements arranged one inside the other is brought about.
  • the electrically conductive connecting element is selected from an electrically conductive foam, electrically conductive contact surfaces or plug connections.
  • the electrically conductive connecting element is made of an electrical foam or electrically conductive contact surfaces, in particular contact surfaces made of materials that can be easily deformed under pressure, such as copper sheets or the like.
  • plug connections it is possible to ensure that even when connecting several hollow rods to one another, two abutting inner measuring tubes are connected to one another over their entire surface in such a way that incorrect measurements due to incorrect contacts between two measuring tubes are excluded.
  • the sensor-based hollow rod system according to the invention is essentially developed in such a way that a protective cover, in particular a protective tube or a protective coating, is inside the measuring tube is provided.
  • a protective cover in particular a protective tube or a protective coating inside the measuring tube, it can be ensured that drill cuttings or the like penetrating into the inside of the hollow rod during the drilling process do not damage the sensitive measuring elements.
  • such a protective tube or the protective coating is formed from a plastic material such as silicone, rubber or the like, which materials are not damaged in particular by stone splinters and can nevertheless be easily and simply arranged inside the tube.
  • the sensor-supported hollow rod system is designed in such a way that the interior of the measuring tube is designed as a supply tube for flushing liquid.
  • the inside of the measuring tube can be used as a supply tube for flushing liquid.
  • the protective cover of the measuring tube is designed in such a way that it has a length exceeding the length of the measuring tube and is only cut to length at the end of the drilling process for deep-hole drilling, anchor setting or the like.
  • Such a design makes it possible to provide an inner cover of the measuring tube that has no connection points and is therefore absolutely tight, which is why the inside of the measuring tube or the inner protective cover of the measuring tube can be used as a supply line for flushing liquid or, if necessary, as a discharge device for drill cuttings .
  • the sensor-supported hollow rod system is designed in such a way that it is also coupled to a condition monitoring system via a conductive plug connection.
  • the end of the hollow rod directed towards a borehole exterior in particular that end which is provided with the nut and the retaining plate, is designed so that it is located between the retaining plate and the nut or between Borehole and support plate is coupled to a condition monitoring system via a conductive connector.
  • a plurality of measured values are taken simultaneously or over time, it is possible with such a design to obtain a complete state of, for example, a deep hole, tunnel or the like.
  • the sensor-supported hollow rod system according to the invention is essentially developed in such a way that the physical parameters measured during measurement, such as the bending moment, the pressure, the tension on an anchor, the moisture content inside the borehole and the like, can be fed safely and reliably to an evaluation unit that the status monitoring system further comprises a power supply, a microchip, at least one, preferably a plurality of sensors for status monitoring and a transmission unit.
  • an energy supply By designing it in such a way that an energy supply, a microchip, at least one, preferably a plurality of sensors for condition monitoring and a transmission unit are provided, it is possible to provide a self-sufficient, sensor-supported hollow rod system, which can be charged with a battery or an accumulator, for example energy supply is sufficient and which, unlike conventional systems, can be easily read out and monitored.
  • the transmission unit provided is also operated with a battery, for example, so that overall a simple hollow rod system that is easy to operate and maintain can be formed.
  • the sensor-based hollow rod system is designed in such a way that a long-range wide area network consisting of the measuring element(s), the transmission unit of the Condition monitoring system and the communication interface is used.
  • the evaluation of measurement data from the condition monitoring system to a communication interface with the Long Range Wide Area Network (LoRaWan network) makes it possible to bundle and evaluate an extremely large amount of data.
  • LoRaWan network also has the advantage that only extremely small battery-operated readout units have to be arranged on the corresponding end devices, which have an extremely long-lasting battery and are usually programmed in such a way that, in addition to the measurement data sent to them, they also display the battery status and the like.
  • the sensor-supported hollow rod system according to the invention is essentially further developed in that it has at least two measuring elements selected from resistance measuring elements, strain gauges, moisture sensors, Has pressure sensors, electrical conductors or fiber optic sensors.
  • the design is essentially such that one of the measuring elements is the measuring tube itself and the other or the others is an additional measuring element applied to this measuring tube, such as an electrical conductor track, pressure sensors, moisture sensors, strain gauges or the like.
  • a measuring value pickup is arranged in such a way that on the one hand it is easily accessible so that it can be replaced in the event of damage and on the other hand it is safe and reliably transmits data available from inside the hollow rod. Therefore, such a sensor-supported hollow rod system is essentially designed in such a way that a measured value sensor is provided and that the nut of the hollow rod system is designed as a measured value sensor.
  • the hollow rod system is essentially developed in such a way that the nut is designed in multiple parts and has at least one sensor carrier, a housing designed to accommodate the sensor carrier, a housing cover and, if appropriate, at least one adapter arranged inside the nut. Due to the fact that the nut is designed in several parts, it is possible on the one hand to properly fix the data obtained from inside the borehole or the conductors or conductor tracks or the like protruding from this to the nut and on the other hand to ensure that a Such a nut, as is required in particular for nuts for fixing armature plates and anchors, can be tightened accordingly without fear of damage to the sensors arranged inside the nut.
  • the multi-part nut has at least one sensor carrier on which the sensors protruding from the borehole are fixed and, if necessary, other sensors that measure environmental data that do not originate from inside the borehole are fixed, a housing that is able to to accommodate the sensor carrier and a housing cover that can be applied to the housing and thus protects the sensor carrier not only in the circumferential direction of the nut, but also in the direction of the end of a drill rod, for example in the direction of the data transmission unit against the ingress of unwanted particles and the like .closed.
  • An adapter can also be provided inside the sensor carrier, in particular when strain gauges are used as the or some of the sensors. The ends of the strain gauges protruding from the mountain must be fixed accordingly so that on the one hand they are held captive and on the other hand they can stretch and contract again without any hindrance. If such an adapter is provided, it is arranged inside the sensor carrier.
  • the invention is further developed in that the sensor carrier has at least one attachment recess or opening for sensors emerging from the hollow rod.
  • Printed circuit boards, ends of sensors, holding devices for sensors and the like, for example, can be fixed to such attachment recesses or openings in order to hold them captively on the sensor carrier.
  • the sensor-supported hollow rod system can be designed in such a way that the adapter is arranged inside the sensor carrier, so that at least the side surface of the sensor carrier that has the at least one mounting recess or opening for sensors emerging from the hollow rod is separated from the Housing is completely covered and that the housing further has at least one optionally openable inspection and maintenance window.
  • the "intelligent nut” it is not only possible to keep all sensors inside the nut safely and reliably and to read out the corresponding data, but it is also possible to check the condition of the corresponding holders from the outside and, if necessary, to access the interior of the mother. It is important to note that the inside of the nut must be protected from dust and moisture so that the sensitive sensor systems are not damaged or rendered inoperable by penetrating dirt or moisture.
  • the housing cover is non-positively connected to the housing, which ensures that on the one hand the nut is closed on all sides and, in particular, is therefore closed on all sides, as corresponds to a possible embodiment of the invention, also rests on a base plate of the sensor carrier.
  • the non-positive connection of the housing cover to the housing makes it possible to open it again later and, for example, to replace or clean parts on the sensor carrier or to disassemble the entire system again.
  • FIG. 1 schematically shows a sensor-supported hollow rod system 1 used in a borehole, in which a drill bit 3 is captively connected to a hollow rod 2 .
  • the hollow rod 2 is in the schematic representation of 1 with cement, indicated schematically in dashed lines at 4, and at its to a borehole exterior directed side, the borehole wall being indicated by 5, secured with an anchor plate or holding plate 6 and a nut 7 shown schematically.
  • the hollow rod 2 is designed in two layers, with the inner layer being denoted by 8 and can either directly accommodate measuring elements or to accommodate measuring elements or to attach measuring elements which are in 1 are not shown, is formed.
  • Measuring elements can be accommodated on the second layer 8 or in the second layer 8 by applying conductive inks, sensor strips, glass fiber webs, inserting glass fiber webs, measuring strips and the like into slots.
  • a plastic material which is designed to cover the layer 8 in order to be able to supply flushing liquid to the drill bit 3, for example.
  • a transmission unit 9 is also shown schematically, with which the data received from the sensor elements are temporarily stored and transmitted to, for example, a communication interface shown schematically at 10 and the transmission unit.
  • the data can be transmitted, for example, by means of a long range wide area network.
  • the two hollow rods 2 are connected to one another by means of a union nut 11, with the area of the in 2
  • An electrically conductive element 12, here an electrically conductive foam, is introduced at the joint shown enlarged between two hollow rods 2 for a secure conductive connection of the two hollow rods 2.
  • the electrically conductive foam extends both between the two hollow rods 2 and the conductive layer 8 arranged inside the hollow rods 2. If no further pipe is provided inside the sensor-supported hollow rod system 1 to transport drill cuttings away, for example, or to supply flushing liquid is, can, like this in 2 is shown schematically, the electrically conductive element 12 also extend over the entire cross section of the hollow rod 2. In such a case, it is ensured in particular that even in the case of greater vibrations, as is the case in particular with rotary percussion drilling, an electrical contact is not interrupted or a sufficient line cross-section is not provided.
  • the sensor carrier 13 is shown with an inserted adapter 14 for a nut 7 of the sensor-supported hollow rod system 1 according to the invention.
  • the sensor carrier 13 is designed in such a way that it has a base plate 15, which is brought into contact with the anchor plate 6 and also has a passage opening 16, the diameter of which is designed such that further elements, such as the adapter 14 can be used.
  • the sensor carrier 13 has a recess and two passage openings 17 and 18, respectively, in order to ensure access to the interior of the sensor carrier 13 that is as unhindered as possible.
  • the through-openings 18 are designed in such a way that, for example, circuit boards in which individual sensors are fixed can be inserted or the through-opening 17 is designed in order to have as free access as possible to the interior of the adapter 14 .
  • the sensor carrier 13 also has a cover plate 19, which is designed in such a way that it fits exactly with an inner diameter of a housing 20, as shown in 4 is designated, with the nut 7 can be screwed or releasably connected.
  • the base plate 15 also has passage openings either for fastening means or for cooperation with corresponding extensions of the housing 20 .
  • the housing 20 for an intelligent nut 7 is shown schematically, which housing 20 is designed in such a way that it can be screwed onto the sensor carrier 13 . Exactly the same screw holes 21 as in the sensor carrier 13 are formed for this purpose.
  • the housing 20 also has a viewing opening 22 which is arranged in order to have a clear view of an adapter 14 which is arranged inside the sensor carrier 13, for example.
  • openings can also be provided in the housing 20, with the openings being designed either as non-openable viewing windows or as tightly closable access openings to the interior of the nut 7 in order to be able to replace damaged elements or to carry out maintenance work.
  • a cover 23 is provided for the housing 20, which cover 23 can be positively connected to the housing 20.
  • the cover 23 has an edge 24 which is designed in such a way that it can grip the housing 20 in a form-fitting manner. Needless to say, this one Edge can be designed as desired or simply from one or more clamping pin (s) or the like. Can be formed.
  • the cover 23 also has a passage opening 25 which is provided for connection to, for example, a transmission unit 9 for a long range wide area network.
  • the adapter 14 is shown in more detail, which adapter 14 is designed so that it has a plurality of depressions or grooves into which a wide variety of strain gauges can be used or clamped or, for example, conductor tracks, fiber optic cables or the like. Can be clamped.
  • the grooves or depressions 26 are designed in such a way that they form essentially U-shaped grooves inside the adapter 14, both in terms of cross section and in terms of their longitudinal extent, since they start from a base surface of the Adapter 14 can extend the same over its height up to a top surface.
  • both the adapter 14 and the sensor carrier 13 can be designed in a wide variety of ways in terms of the design of ribs, grooves, depressions, passage openings and the like, but it is imperative that the external dimensions of the adapter are such that this can be accommodated inside the sensor carrier and the sensor carrier is dimensioned such that it can be overlapped or fully surrounded by the housing.

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  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Geology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Structural Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Geophysics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • Testing Or Calibration Of Command Recording Devices (AREA)
  • Measuring Fluid Pressure (AREA)
EP22207596.2A 2021-11-17 2022-11-15 Système de tige creuse assisté par capteur Pending EP4183974A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ATA50918/2021A AT525566B1 (de) 2021-11-17 2021-11-17 Sensorgestütztes hohlstab-system

Publications (1)

Publication Number Publication Date
EP4183974A1 true EP4183974A1 (fr) 2023-05-24

Family

ID=84358178

Family Applications (1)

Application Number Title Priority Date Filing Date
EP22207596.2A Pending EP4183974A1 (fr) 2021-11-17 2022-11-15 Système de tige creuse assisté par capteur

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EP (1) EP4183974A1 (fr)
AT (1) AT525566B1 (fr)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5545987A (en) * 1992-12-23 1996-08-13 Suspa Spannbeton Gmbh Monitoring device for tension members of soil or rock anchors, compression members of poles, prestressing elements for prestressed concrete structures and bridge cables
WO2002088523A1 (fr) * 2001-04-26 2002-11-07 Techmo Entwicklungs- Und Vertriebs Gmbh Procede et dispositif de forage d'un trou et de fixation d'un ancrage dans un trou de forage
US20070264088A1 (en) * 2004-10-21 2007-11-15 Archibald Richter Method for Embedding Rock Anchors
WO2016076788A1 (fr) 2014-11-13 2016-05-19 Rock Safety Systems I Norr Ab Dispositif pour un boulon d'ancrage et procédé d'utilisation du dispositif et système de renforcement comprenant un tel dispositif
CN108426517A (zh) * 2018-03-23 2018-08-21 中国科学院武汉岩土力学研究所 一种围岩径向位移测量装置
WO2020169356A1 (fr) 2019-02-19 2020-08-27 Montanuniversität Leoben Boulon d'ancrage comprenant un capteur servant à mesurer une tension mécanique
US11131191B2 (en) * 2016-06-21 2021-09-28 Alert Technologies Inc. Sensing device for a rock bolt

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011120572A1 (de) * 2011-01-27 2012-08-02 Minova International Ltd. Bohrvorrichtung zum Schlag- oder Drehschlagbohren mit Verbindungsmuffe
DE102013205319A1 (de) * 2013-03-26 2014-10-02 Gud Geotechnik Und Dynamik Consult Gmbh Bohr- und Düsenstrahlgestänge
DE102018006901B4 (de) * 2018-08-07 2023-06-15 Universität Bremen Vorrichtung und Verfahren zur Durchführung geologischer Untersuchungen

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5545987A (en) * 1992-12-23 1996-08-13 Suspa Spannbeton Gmbh Monitoring device for tension members of soil or rock anchors, compression members of poles, prestressing elements for prestressed concrete structures and bridge cables
WO2002088523A1 (fr) * 2001-04-26 2002-11-07 Techmo Entwicklungs- Und Vertriebs Gmbh Procede et dispositif de forage d'un trou et de fixation d'un ancrage dans un trou de forage
US20070264088A1 (en) * 2004-10-21 2007-11-15 Archibald Richter Method for Embedding Rock Anchors
WO2016076788A1 (fr) 2014-11-13 2016-05-19 Rock Safety Systems I Norr Ab Dispositif pour un boulon d'ancrage et procédé d'utilisation du dispositif et système de renforcement comprenant un tel dispositif
US11131191B2 (en) * 2016-06-21 2021-09-28 Alert Technologies Inc. Sensing device for a rock bolt
CN108426517A (zh) * 2018-03-23 2018-08-21 中国科学院武汉岩土力学研究所 一种围岩径向位移测量装置
WO2020169356A1 (fr) 2019-02-19 2020-08-27 Montanuniversität Leoben Boulon d'ancrage comprenant un capteur servant à mesurer une tension mécanique

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AT525566B1 (de) 2023-05-15
AT525566A4 (de) 2023-05-15

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