EP2366869A2 - Ancre autoforeuse - Google Patents

Ancre autoforeuse Download PDF

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Publication number
EP2366869A2
EP2366869A2 EP11001918A EP11001918A EP2366869A2 EP 2366869 A2 EP2366869 A2 EP 2366869A2 EP 11001918 A EP11001918 A EP 11001918A EP 11001918 A EP11001918 A EP 11001918A EP 2366869 A2 EP2366869 A2 EP 2366869A2
Authority
EP
European Patent Office
Prior art keywords
anchor
tube
drilling
drill bit
self
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.)
Withdrawn
Application number
EP11001918A
Other languages
German (de)
English (en)
Other versions
EP2366869A3 (fr
Inventor
Markus Swoboda
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.)
Individual
Original Assignee
Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP2366869A2 publication Critical patent/EP2366869A2/fr
Publication of EP2366869A3 publication Critical patent/EP2366869A3/fr
Withdrawn legal-status Critical Current

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    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D20/00—Setting anchoring-bolts
    • E21D20/02—Setting anchoring-bolts with provisions for grouting
    • E21D20/021—Grouting with inorganic components, e.g. cement
    • E21D20/023—Cartridges; Grouting charges
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D20/00—Setting anchoring-bolts
    • E21D20/02—Setting anchoring-bolts with provisions for grouting
    • E21D20/025—Grouting with organic components, e.g. resin
    • E21D20/026—Cartridges; Grouting charges
    • 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

Definitions

  • the invention relates to a self-drilling anchor with a cylindrical anchor tube and a drill bit, wherein the anchor tube has on its outer surface at least one profiling, wherein the drill bit is attached to the setting direction end of the anchor tube, and wherein in the anchor tube, a curable composition is arranged by an extrusion device can be brought in the direction of the drill bit.
  • Rock anchors in particular composite anchors, and suitable drilling equipment with appropriate tool frames and their use in mining and tunneling are known in the art for a long time in a variety of configurations.
  • Rock anchors serve primarily to stabilize rock strata, especially in cavities, such as tunnels, galleries, or the like. They assume the task of reinforcement or the effect of a bias and thus enhance the bearing effect of the rock.
  • the combination of superficial rock layers weakened in their load bearing capacity with deeper, stable rock layers stabilizes the rock overall and increases the load-bearing capacity.
  • Rock anchors are subdivided according to their anchoring technique, namely in rock anchors with a mechanical wedging, rock anchors with a composite effect by mortaring or gluing and rock anchors with Reibkraftübertragung.
  • rock anchors which are introduced into a prepared bore and those which are designed such that they also perform the drilling function, namely the bore for attachment to the rock bolt is carried out as a drill - Edohranker.
  • the Bohrfimtechnischtechnisch the self-drilling anchor is used only for a single hole, since the self-drilling anchor - after he is introduced into the rock - remains there.
  • Rock anchors which are connected by composite action, ie by mortaring or gluing, with the rock, are referred to as a composite anchor.
  • the DE 103 01 968 discloses a self-drilling anchor with a receiving body and a drill bit attached thereto, the self-drilling anchor having an inner tube within the receiving body.
  • a cartridge with a mounting mass and a mixing device is provided, so that mixed by pressing the cartridge, the mounting mass in the mixing device and can be applied in the direction of Bohrkrohne, so that the self-drilling anchor is firmly connected to the surrounding rock.
  • the self-drilling anchors known from the prior art have the disadvantage that they are not suitable for impact drilling and thus not for hard rock due to their complex structure with many individual components, since the impulse drilling in the axial direction resulting impact pulses can destroy the inner structure of the self-drilling anchor.
  • a shock pulse in the axial direction is applied to the drill, so that the drill strikes into the rock and removes rock pieces.
  • the present invention seeks to provide a self-drilling anchor, which is suitable by a simple and robust design for impact drilling and thus for use in special hard rocks.
  • This object is achieved in a generic self-drilling anchor in that an inner tube is arranged as flushing channel within the anchor tube, that the inner tube with outlet opening in the drill bit is in communication, and that formed between the inner tube and anchor tube annular gap in the longitudinal extent of the anchor tube at least partially with the curable mass is filled.
  • the inner tube is preferably arranged coaxially with the anchor tube within the anchor tube and serves to guide a cooling or rinsing liquid to the drill bit during the drilling process, wherein water is usually used as rinsing liquid.
  • the curable composition filled into the annular space between the armature tube and the inner tube at least partially supports the inner tube and additionally holds the inner tube in its position within the anchor tube.
  • the amount of curable material filled into the annulus is influenced by the size of the bore and the length of the self-drilling anchor and can be adjusted or fixed depending on the application.
  • the annular space in the anchor tube between the setting direction-side end and the setting direction-ended end is almost completely filled with a curable composition. '
  • the inner tube is placed in a central bore within the drill bit attached to the anchor tube and sealingly connected in the drill bit, so that no rinsing fluid between the drill bit and inner tube can escape.
  • the central bore in the drill bit communicates with the exit apertures on the face of the drill bit so that spillage fluid directed through the inner tube can exit the exit apertures and be used on the face of the drill bit for rinsing and cooling during the drilling operation.
  • the anchor tube has in its outer surface on a preferably spiral-shaped profiling, which serves during the drilling process to dissipate the dissolved by the drill bit rock in the direction of the open end of the bore.
  • the drill bit has a device for mixing the hardenable mass preferably comprising two components, that the mass can be brought by an extrusion device in the direction of the drill bit and after mixing in the side region of the drill bit emerges at the setting direction end of the anchor tube.
  • the device for mixing the curable composition comprising preferably two components is preferably formed integrally with the drill bit. It then consists of a channel with a varying cross-section, so that the components of the curable composition - for example, filler and hardener a two-component adhesive - are sufficiently mixed.
  • the curable composition is pressed out in the side region of the drill bit at the setting direction end of the anchor tube through the squeezing and so evenly distributed - surrounding the self-drilling anchor - in the hole.
  • the pressing or the transport of the hardenable mass by the device for mixing within the drill bit is done by the squeezing device, which preferably exerts a force on the end facing away from the drill bit end of the curable composition, so that the curable material within the annulus around the inner tube in Direction of the drill bit and thus transported in the direction of the device for Durclunischung.
  • the drill bit has a spiral-shaped recess at least in part of its outer surface, wherein a plurality of deflection ribs project into the recess.
  • the drill bit is in the setting direction side Inserted end of the anchor tube, so that between the inner wall of the anchor tube and the outer surface of the drill bit through the recess a mixing channel is formed.
  • the recess in the surface of the drill bit is preferably in the part of the drill bit which is inserted in the setting direction end of the anchor tube.
  • the recess extends in such a way in the surface of the drill bit, that upon insertion of the drill bit in the anchor tube, a mixing channel is formed, which has at least one inlet opening and preferably at the end of the anchor tube, in the side region of the drill bit, at least one laterally located mass outlet opening within the anchor tube.
  • the mixing channel is thus limited by the recess in the surface of the drill bit and the inner wall of the anchor tube.
  • the cross section of the mixing channel is changed locally, so that a uniform mixing of the pressed through the mixing channel mass.
  • the deflecting ribs can be distributed uniformly or unevenly within the recesses and material, force or positively connected to the drill bit.
  • the drill bit which is inserted into the setting direction end of the Auker tube, is preferably non-rotatably connected to the anchor tube.
  • This is realized for example by drivers, which form at least one projection on the drill bit, which engages in a recess in the anchor tube, so that a rotationally fixed positive connection between the drill bit and anchor tube is formed.
  • the drill bit can be connected to the anchor tube with a further additional positive, non-positive or cohesive connection.
  • a closure mechanism is provided in the anchor tube between drill bit and hardenable mass, which separates the hardenable mass from the drill bit, wherein the closure mechanism releases an outlet opening for the mass in the direction of the drill bit as the pressure on the mass increases.
  • the hardenable mass is thus separated during the drilling process by the shutter mechanism of the drill bit and thus also from the device for mixing.
  • the sealing mechanism is pressure-sensitive and consists of a pressure-sensitive film so that as the pressure on the hardenable mass increases, the film yields, thereby opening the shutter mechanism and releasing the curable composition to the mixing device.
  • the pressure increase is preferably carried out by a squeezing device, which applies a force on the setting direction side facing away from the end of the curable composition.
  • the closure mechanism is designed such that it does not already open by the axial impulses applied during the impact bore, but only by a deliberate actuation of the extrusion device.
  • the preferably two components of the hardenable mass are arranged separately from each other before thorough mixing and come into contact with each other only upon entry into the device for mixing, so that hardening of the mass in the anchor tube is prevented.
  • the curable composition is arranged in at least one tube, that the inner tube is passed through the tube and the tube is sealed at its two end sides to the inner tube.
  • the tube thus surrounds the inner tube and is filled with the hardenable mass, so that the tube substantially abuts against the inner wall of the anchor tube and the tube with the curable composition disposed therein the annular space between inner tube and anchor tube - at least on a part of the longitudinal extension of the anchor tube - completes.
  • the curable composition thus comes in this state - before the Auspressvorgang - only directly with inner tube in contact; from contact with the anchor tube, the hardenable mass is separated by the tube.
  • the tube is sealed to the inner tube, so that overall a doped volume is formed by the tube for the curable composition, wherein the tube and thus the hardenable mass is penetrated by the inner tube.
  • the hose is at least at its setting direction end with a clamp is included, which presses the hose against the outer surface of the inner tube, so that a seal between the hose and the outer surface of the inner tube is ensured, in particular the opening mechanism is realized by widening of the hose encompassing clamp.
  • the clamp preferably comprises the tube in its entirety and presses it against the outer surface of the inner tube, so that in this way the chamber for the hardenable compound is limited at least at the setting direction end of the tube.
  • the clip is so flexible and / or has an opening that, with an increase in the pressure on the curable composition or on the filled with the curable composition hose, the ends of the hose are pulled out of the clip or the clip of the Hose is pressed down so that the curable mass - after drilling - in the direction of the device for mixing or the drill bit can escape from the hose.
  • a sleeve is preferably provided between drill bit and the setting direction end of the hose, which defines the distance between the hose and the drill bit, so that the clamp in any case with an increase in pressure on the curable Mass is stripped off the end of the hose.
  • the clamp at the setting direction facing away from the end of the hose is preferably attached such that an opening of the hose is excluded at this end.
  • a development that is particularly suitable when using a multi-component curable composition provides that in the hose at least two separate, extending in the longitudinal direction of the anchor tube chambers are formed.
  • a filler and a hardener can be stored separately from each other, the filler and the hardener only come into contact with each other when they together at the setting direction end of the hose in the direction of the drill bit through
  • two tubes of different diameters are arranged around the inner tube, so that in an outer annular chamber - between the two tubes - for example, the hardener and in the inner clip - between the inner tube and inner tube - for example, the filler is arranged, both hoses are embraced by a common bracket.
  • a piston is provided as ejection device in the anchor tube at the end of the anchor tube facing away from the setting direction, wherein the piston is axially movable within the anchor tube , and wherein the pressure on the mass is increased by movement of the piston in the direction of the hardenable mass.
  • the piston exerts - upon activation or actuation - on the arranged in the annular gap between the inner tube and armature tube mass, in particular on the piston facing annular surface of the curable composition, a uniform force, the first to open the Ver gleichmechanismusses and then to the displacement of the curable Mass leads in the direction of the mixing channel in the drill bit.
  • the force of the piston is generated by a movement of the piston axially in the setting direction.
  • the piston is preferably made flat at its setting direction end.
  • an annular disc can be provided, which ensures a uniform force application to the mass in the annulus.
  • the piston is guided on the inner tube, wherein the piston is configured such that it seals the annular gap between the inner tube and anchor tube to both the inner tube and the anchor tube.
  • the Piston also serves to position the inner tube within the anchor tube, as it ensures a uniform distance between the - guided by the piston - inner tube to the inner wall of the anchor tube, preferably made of a plastic or a rubber piston seals the annular gap between the inner tube and anchor tube reliably , so that, for example, the movement of the piston in the setting direction can be generated by an applied on the setting direction side facing away from the piston medium pressure without the necessary for the pressure generation medium, eg. B, water flows past the piston, so that the medium also does not come into contact with the curable composition present on the setting direction side of the piston.
  • the pressure generation medium eg. B
  • a particularly reliable seal is achieved according to a further embodiment in that the piston has at least one flexible collar, wherein the diameter of the flexible collar is greater than the inner diameter of the anchor tube, so that a seal between the anchor tube and piston takes place.
  • the flexible collar of the piston ensures that a seal between the inner wall of the anchor tube and the piston is ensured even with irregularities in the inner wall of the anchor tube, since the flexible collar of the piston always hugs the inner wall of the Anlcerrohrs and thus ensures a seal.
  • the piston in its provided for the implementation of the inner tube central through hole additionally have at least one sealing blade, which reduces the cross section of the bore and thereby always applies a certain sealing force to the inner tube.
  • the piston has at least three successively arranged flexible collar and at least three successively arranged sealing blades, so that a multi-stage seal is realized.
  • a drilling adapter is used, which is tailored to the properties of the self-drilling anchor and the Self-drilling anchor at least partially for use with the drill takes on.
  • a termination device is provided at the end of the anchor tube facing away from the direction of the set, which has a flushing bore and a pressure channel.
  • the flushing bore extends axially over the entire length through the termination device.
  • the pressure channel has a radially extending inlet opening and an axially extending outlet opening arranged offset to the flushing bore in the setting direction-side end side of the closure device, the pressure channel preferably extending at least in sections parallel to the flushing bore in the closure device.
  • the termination device is preferably attached to the setting direction facing away from the armature tube, represents the conclusion of the anchor tube and is used to adapt the self-drilling anchor to a drilling adapter and thus for connection to a drill.
  • the closure device is preferably pierced centrally by the flushing bore, so that the flushing bore in each case has an outlet or inlet on the opposite flat end sides of the substantially cylindrically shaped closure device.
  • the diameter of the flushing bore corresponds at least in sections at least to the outer diameter of the inner tube.
  • a pressure channel is additionally provided in the terminating device which extends eccentrically in the axial direction of the terminating device, at least partially parallel to the flushing bore and has an outlet opening arranged next to the outlet of the flushing bore on the setting direction-side end side of the terminating device.
  • the pressure channel is accessible via a radially extending inlet opening, which is thus arranged orthogonal to the pressure channel.
  • the maximum outer diameter of the closure device preferably corresponds substantially to approximately a diameter of the profile of the outer tube, preferably the diameter in the base region of the outer tube profiling.
  • the radially extending inlet opening is formed in a groove extending annularly over the circumference of the closing device.
  • the groove is provided in the outer surface of the terminating device and extends substantially orthogonal to the longitudinal axis of the anchor tube, the inlet opening of the pressure channel is arranged at the bottom of the groove, with screwed onto the self-drilling anchor drilling adapter between the drilling adapter and the self-drilling anchor through the groove a first annular space is formed, in which a medium is guided, so that the medium located in the first annular space can propagate through the inlet opening and thus through the pressure channel.
  • seals are preferably provided which prevent leakage of the medium from the first annulus or realize a seal to the drilling adapter.
  • the termination device is at least partially inserted into the anchor tube and preferably between the anchor tube and terminator a sealing connection is realized.
  • the terminating device preferably has a first section with a diameter which corresponds approximately to the inner diameter of the anchor tube, and a second section whose diameter is greater than the inner diameter of the anchor tube, so that the terminating device can be inserted into the anchor tube with the first section.
  • connection between the termination device and the anchor tube is preferably designed to be sealing, so that a pressure space is created between the extrusion device - the piston - and the termination device within the anchor tube.
  • the sealing connection between the armature tube and closure device is produced, for example, by virtue of the termination device having an outer pzofiling with a slight pitch in its first section of reduced diameter, so that the terminating device can be screwed or pressed into the end of the anchor tube facing away from the direction of setting. and / or positive connection between closing device and anchor tube a sealing function is realized.
  • a seal is provided on the peripheral surface or on the contacting end faces of the termination device or of the anchor tube, which complements the sealing of the pressure chamber.
  • the inner tube is at least partially inserted into the flushing bore of the termination device, so that the inner tube is sealingly connected to the flushing hole.
  • the pressure chamber which forms between the closure device and the ejection device-the piston-is separated from the interior volume of the inner tube, so that the pressure chamber surrounds the inner tube and is accessible only via the pressure channel in the assembled state.
  • the inner volume of the inner tube is accessible through the sealing connection between Spülbohrung and Endseinseinung from the setting direction side facing away from thedicahrankers exclusively on the flushing hole within the Absehluss heard.
  • the pressure chamber can be filled or acted upon by the pressure channel with a medium, so that a medium pressure is formed in the pressure chamber, whereby the ejection device is moved in the direction of the drill bit, and a pressing of the curable composition, preferably through the mixing channel occurs ,
  • About the flushing hole in the final finishing the inner volume of the inner tube during the drilling process can be acted upon with a flushing medium, wherein the flushing medium emerges from the self-drilling anchor on the drill bit.
  • the invention further relates to a bobbin adapter with which preferably the self-drilling anchor according to the invention can be adapted to a drill.
  • the drilling adapter has a base body with which the drilling adapter can be screwed onto the profiling of the outer surface of the anchor tube.
  • the drilling adapter is characterized in that the base body has a flushing bore and a pressure channel, wherein the flushing bore is in the screwed onto the self-drilling anchor state with the flushing bore of the termination device and thus in communication with the inner tube of the self-drilling anchor.
  • the pressure channel of the drilling adapter is in the assembled state via a through the groove in the Absehlusseinriehtung between terminator and the base body formed first annular gap with the pressure channel of the termination device in connection, resulting in a joint connected through the common pressure channel. Due to the fact that the pressure channels - the termination device and the drilling adapter - are connected to one another via the first annular gap, it is not necessary to ensure exact positioning of the pressure channels relative to each other during assembly, since in each position of the termination device a connection between the two Both Duckkanälen is made through the annular gap.
  • circumferential seals are preferably provided on the terminating device and / or on the base body, which prevent leakage of the medium stirred in the annular gap.
  • the drilling adapter has a shaft at its setting direction end, with which the drilling adapter can be fastened to a drill.
  • This shaft will preferably pass axially from the flushing bore so that the flushing bore can be fed directly from a drilling rig with a flushing medium.
  • the flushing bore of the drilling adapter is connected to the flushing bore of the terminating device in such a way that a medium introduced through the flushing bore of the drilling adapter is introduced directly into the internal volume of the inner tube through the flushing bore of the terminating device.
  • additional ring seals are provided between the drilling adapter and the termination device.
  • the drilling adapter is screwed with its base body on the profiling of the anchor tube, so that the drilling adapter engages with its body the termination device and at least a portion of the anchor tube, whereby the anchor tube can be brought over the drilling adapter with a drill in a rotational movement in the drilling direction ,
  • the end face of the terminating device facing away from the setting direction preferably bears against a stop edge in the main body of the drilling adapter.
  • a sealing stub detachably connected to the base body wherein the sealing stub is at least partially plugged into the flushing bore of the closure device and connected to the flushing bore in the base body.
  • the sealing socket thus establishes a sealing connection between the flushing bore in the base body of the drilling adapter and the flushing bore in the terminating device, in that the sealing neck projects into the terminating device.
  • the sealing nozzle itself preferably has a central bore which establishes the connection between the flushing bore in the base body and the flushing bore in the closure device.
  • the sealing nozzle is preferably connected via a thread to the base body and screwed into the base body in such a way that it represents an extension of the flushing bore of the drilling adapter.
  • the sealing nozzle enters the flushing bore of the terminating device at least partially opposite the setting direction of the inner tube, whereby a sealing connection between the sealing sleeve and the terminating device is preferably produced by a seal.
  • the inner volume of the inner tube is thus connected to the flushing bore of the drilling adapter via the flushing bore in the closure device and via the sealing neck.
  • the flushing bore of the drilling adapter can thus be fed during the drilling with a flushing medium, which propagates directly and without leakage into the inner tube and is thus passed to the drill bit.
  • the sealing nozzle Due to the frequent placement of the drilling adapter on various self-drilling anchor can cause wear of the sealing nozzle or the seals on the sealing nozzle, however, the sealing nozzle can be exchanged as a wearing part in a simple manner, whereby a reliable sealing connection between the drilling adapter and termination device is always guaranteed.
  • a rotatably mounted on the body outer member wherein the outer member has a radial bore and an inner groove.
  • the groove forms a second annular gap in the assembled state between the base body and outer element, wherein the second annular gap with the pressure channel of the base body and the radial bore in the outer member is such that the pressure channel of the body through the radial bore and thus the pressure channel in the end element with a
  • the pressure channel in the closing element in the assembled state can also be acted upon by a pressure medium even when the movement is rotating via the radial bore of the outer element.
  • the second annular gap between the base body and the outer element - like the first annular gap - is preferably also sealed with at least two seals between outer element and base body, so that no medium can escape from the second annular gap.
  • the outer element is preferably rotatably supported by ball bearings on the base body of the drilling adapter and held in position by spring rings, so that the radial bore in the rotating state of the base body can always remain at a fixed position, the pressure channel of the drilling adapter rotating over the inner groove of the Outside element or over the second annular gap is performed.
  • Fig. 1 shows an embodiment of a self-drilling anchor 1 with a cylindrical anchor tube 2 and a drill bit 3.
  • the anchor tube 2 has in its outer surface 4 a spirally extending in this embodiment profiling 5, wherein the profiling 5 for discharging the dissolved by the drill bit 3 rock material in the direction of Bore outlet serves.
  • the drill bit 3 is inserted at the setting direction end 6 of the anchor tube 2 in the anchor tube 2.
  • an inner tube 7 extending coaxially to the anchor tube 2 which serves as a flushing channel, so that, for example, water is passed through the inner tube 7 during the drilling process.
  • the inner tube 2 is sealingly inserted into the drill bit 3, so that water passed through the inner tube 7 can escape through outlet openings 8 in the direction of the seal end side of the drill bit 3.
  • the annular gap 9 formed between the inner tube 7 and the anchor tube 2 is filled almost over the entire length of the self-drilling anchor 1 with a hardenable mass 10, which supports the inner tube 7 with respect to the anchor tube 2 and with the after the drilling of the between the self-drilling anchor. 1 and the - not shown - rock resulting cavity is filled.
  • Fig. 2a shows a drill bit 3 for use in a self-drilling anchor 1 according to Fig. 1 ,
  • the drill bit 3 has in a part of its outer surface 11 a helically extending recess 12, wherein in the recess 12 a plurality of deflecting ribs 13 protrude.
  • Fig. 2b shows the drill bit according to Fig. 2a in a perspective side view, in which the protruding into the recess 12 Umlenkrippen 13 are clearly visible.
  • drivers 14 are arranged, which cause a positive engagement of the drill bit 3 in recesses 15 in the anchor tube 2 and thereby realize a positive connection between the drill bit 3 and the anchor tube 2.
  • a mixing channel 17 is formed.
  • the mixing channel 17 thus begins within the anchor tube 2 and ends according to Fig. 3 - In mass outlet openings 18 in setting direction end portion 6 of the anchor tube 2.
  • the drivers 14 engage in the recesses 15 of the anchor tube 2, so that a rotationally fixed positive connection between the drill bit 3 and the anchor tube 2 is formed.
  • the drill bit 3 four cutting edges 19.
  • the hardenable mass 10 is according to the embodiment Fig. 1 disposed within a tube 20.
  • the tube 20 surrounds the inner tube 7, so that a chamber is formed around the inner tube 7 through the tube 20, in which the hardenable mass 10 is located.
  • Fig. 4 shows an inner tube 7 for a self-drilling anchor 1, wherein the inner tube 7 is surrounded by a tube 20.
  • the tube 20 is at its end sides in each case with a clamp 21, so that the hardenable mass 10 is disposed in the sealed tube 20.
  • the clamps 21 grip the tube 20 at its ends so that it is pressed against the outer surface 22 of the inner tube 7, so that a seal between the tube 20 and the outer surface 22 of the inner tube 7 is realized.
  • Fig. 1 shows the inner tube 7 with the tube 20 in the assembled state within the anchor tube. 2
  • the self-drilling anchor 1 In use, the self-drilling anchor 1 is now drilled to the desired depth in a - not shown - rock, the drill bit 3 realized the loosening and destruction of the rock and the dissolved rocks are removed by the profiling 5 in the anchor tube 2 to the hole opening against the setting direction.
  • the hardenable mass 10 present in the hose 20 To fix the self-bog anchor 1 in the rock, the hardenable mass 10 present in the hose 20 must now be pressed out of the anchor pipe 2 or the hose 20, so that the hardenable mass 10 is distributed along the outer surface 4 of the self-drilling anchor 1 and the rock. After hardening of the mass 10, the self-drilling anchor 1 is then preferably firmly connected to the rock over its entire length.
  • the pressing of the hardenable mass 10 is realized with a piston 23, for example, directly or - as in the embodiment according to Fig. 1 - Exerts a force on the setting direction facing away from the end 25 of the curable composition 10 in the tube 20 via a pulley 24, whereby the pressure in the tube 20 is increased.
  • the piston 23 is acted upon on its side facing away from the curable material 10 side with a medium pressure, so that the piston 23 in the direction of the hardenable mass 10 - in the setting direction - moves and so exerts a force on the mass 10, by the resulting pressure on the hardenable mass 10 is at the setting direction side End 6 of the hose 20, the local end 26 of the tube 20 is pulled out of the clamp 21 and stripped off the clamp 21, so that the tube 20 opens on the setting direction side and the hardenable mass 10 in the direction of the mixing channel 17 of the drill bit 3 can escape.
  • the hardenable mass 10 is then mixed in the mixing channel 17 of the drill bit 3 by the varying cross section and exits through the mass outlet openings 18 in the side region of the anchor tube 2 and as a result distributed along the Disbohrankers 1.
  • the piston 23 is guided by the medium pressure almost completely up to the setting direction end 6 of the anchor tube 2.
  • a sleeve 27 is provided between the drill bit 3 and the end 26 of the hose 20, which defines the distance between the hose 20 and drill bit 3 and an opening the hose 20 at the end 26 ensures by the pressure increase.
  • the piston 23 is designed such that it seals the annular gap 9 both against the inner tube 7 and against the anchor tube 2.
  • the piston 23 has three successively arranged flexible collar 28, wherein the diameter of the flexible collar 28 is greater than the inner diameter of the anchor tube 2, so that the collar 28 always create a sealing against the inner wall 16 of the anchor tube 2.
  • the piston 23 is according to Fig. 1 guided on the inner tube 7, so that it for sealing with respect to the inner tube 7 - according to Fig. 5a - Has three successively arranged sealing blades 29, which reduce the diameter of the central bore 31 in the piston body 30 and realize a seal with respect to the inner tube 7.
  • Fig. 5b shows the piston 23 in a perspective view obliquely from behind.
  • the flexible collar 28 are inclined, wherein the flexible collar 28 in MontagcMap according to Fig. 1 are inclined against the setting direction, so that they in a movement of the piston 23 in the direction of the setting direction side End 6 of the anchor tube 2 always dodge flexible and create the inner wall 9 of the anchor tube 2.
  • Fig. 6 is the setting direction facing away from a self-drilling anchor 1 in cut ( Fig. 6 below) and uncut ( Fig. 6 see above) side view.
  • the self-drilling anchor 1 is shown cut off in each case, wherein the tube 20 with the hardenable mass 10 or the inner tube 7 are shown as somewhat lengthened by way of example.
  • a termination device 32 is introduced, which has a in Fig. 7a and Fig. 7b illustrated outer profiling 33 has and thus pressed or screwed into the anchor tube 2 so that a sealing connection between the anchor tube 2 and the termination device 32 is formed.
  • a seal 34 is provided on the contacting end faces of the anchor tube 2 or the terminating device 32, which additionally assumes a sealing function.
  • the closure device 32 will pass centrally through a flushing bore 35, wherein the inner tube 7 is inserted into the flushing bore 35 on the side facing the setting direction of the closure device 32 such that a sealing connection between the inner tube 7 or the outer wall 22 of the inner tube 7 and the closure device 32 is realized is, whereby the inner volume of the inner tube 7 communicates with the flushing hole 35.
  • the sealing device 32 has a pressure channel 36, wherein the pressure channel 36 extends at least partially parallel to the flushing bore 35 within the closure device 32. At the setting direction side facing away from the termination device 32, the pressure channel 36 via a radially extending inlet opening 37 is accessible.
  • the radially extending inlet opening 37 terminates in the bottom region of a groove 40 which extends in an annular manner over the circumference of the closure device 32, wherein the groove 40 is formed substantially orthogonal to the longitudinal extension of the self-drilling anchor.
  • the pressure channel 36 has an offset to the flushing bore 3 5 arranged outlet opening 38 on the outlet opening 38 thus ends in the pressure chamber 39 between the piston 23 and terminator 32nd
  • a closure device 32 For attachment within a - in Fig. 6 Anchor tube 2, the termination device 32 has an outer profile 33, wherein the outer profile 33 is a positive or non-positive connection between the termination device 32 and anchor tube 2 is made, which simultaneously seals the pressure chamber 39.
  • the circumferential groove 40 On the side facing away from the mounting direction in the assembled state of the termination device 32, the circumferential groove 40 is provided, wherein at the bottom of the circumferential groove 40, the radially extending inlet opening 37 of the pressure channel 36 is arranged.
  • the groove 40 is thus in the rear portion of the terminal device 32 with an enlarged diameter, compared to the front portion which is inserted into the anchor tube 2.
  • Fig. 8 shows an embodiment of a Bohradapters 41 for use with a self-drilling anchor 1 according to the invention, wherein the Bohradapter 41 has a base 42.
  • the drilling adapter 41 can be screwed onto the profiling 5 of a self-drilling anchor 1 with the base body 42 via an internal profiling 43.
  • the main body 42 of the Bohradapters 41 has a flushing bore 44 and a pressure channel 45.
  • Fig. 9 shown assembly state in which the drill adapter 41 is screwed onto the anchor tube 2 of the self-drilling anchor 1, a first annular gap 46 is formed by the groove 40 in the termination device 32 between the base body 42 and the termination device 32.
  • the first annular gap 46 is in the assembled state with the pressure channel 36 of the termination device 32 and the pressure channel 45 of the base body 42 of the Bohradapters 41 in combination.
  • a sealing nozzle 47 is provided within the base body 42, which serves to connect the flushing bore 44 of the drilling adapter 41 with the flushing bore 35 of the termination device 32.
  • the sealing nozzle 47 is connected via a thread 48 releasably connected to the base body 42, so that the sealing nozzle 47 as soon as it is worn, can be replaced.
  • a seal 49 is arranged between the sealing nozzle 47 and body 42.
  • FIG. 9 shows that on the base body 42 of the Bohradapters 41, an outer member 50 is rotatably supported by ball bearings 51 and secured with spring washers 52 with respect to its position.
  • the outer element 50 has a radial bore 53, wherein the radial bore 53 terminates in an inner groove 54 and in the assembled state between the base body 42 and outer element 50, a second annular gap 55 is formed.
  • the second annular gap 55 is connected both to the radial bore 53 and to the pressure channel 45 of the base body 42 in conjunction.
  • the radial bore 53 is thus on the second annular gap 55, the pressure channel 45 of the base body 42, the first annular gap 46 and the pressure channel 36 of the Ab Layer 32 connected to the pressure chamber 39, when the drilling adapter 41 is screwed onto a self-drilling anchor 1.
  • seals 56 are provided in the outer element 50 in each case to the right and to the left of the inner groove 54, which seal the second annular gap 55.
  • Fig. 10 shows the setting direction facing away from a self-drilling anchor 1 according to Fig. 6 and a drill adapter 41 according to the Fig. 8 and 9 , wherein the drilling adapter 41 is not screwed in the illustrated state with its inner profiling 43 on the profiling 5 in the anchor tube 2.
  • the drilling adapter 41 is screwed onto the self-drilling anchor 1 and attached to a - not shown - drill.
  • the inner tube 7 is acted upon via the flushing holes 35, 44 with a flushing medium, which through the inner tube 7 to - in Fig. 1 shown - drill bit 3 is passed.
  • the hardenable mass 10 is pressed out of the tube 20 or the anchor tube 2, wherein it is due to the profiling 5 to the self-drilling anchor 1 distributed, hardens and thus anchored the self-drilling anchor 1 firmly in the rock.

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  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Earth Drilling (AREA)
  • Piles And Underground Anchors (AREA)
EP11001918A 2010-03-08 2011-03-08 Ancre autoforeuse Withdrawn EP2366869A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102010010705 2010-03-08
DE201010023627 DE102010023627B4 (de) 2010-03-08 2010-06-14 Selbstbohranker

Publications (2)

Publication Number Publication Date
EP2366869A2 true EP2366869A2 (fr) 2011-09-21
EP2366869A3 EP2366869A3 (fr) 2013-03-13

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ID=44063147

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EP11001918A Withdrawn EP2366869A3 (fr) 2010-03-08 2011-03-08 Ancre autoforeuse

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EP (1) EP2366869A3 (fr)
DE (1) DE102010023627B4 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3323556A1 (fr) 2016-11-17 2018-05-23 HILTI Aktiengesellschaft Appareil de fixation comprenant des arbres d'entraînement pouvant être bloqués axialement, procédé de fixation et ancre extensible associée
CN109779665A (zh) * 2019-03-29 2019-05-21 攀枝花学院 钻锚一体化锚杆
CN114352330A (zh) * 2022-03-18 2022-04-15 应急管理部国家自然灾害防治研究院 一种用于防止地震对隧道冲击的注浆支护锚索设备
CN114892655A (zh) * 2022-04-29 2022-08-12 中交一公局集团有限公司 锚管组件

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Publication number Priority date Publication date Assignee Title
DE10301968A1 (de) 2003-01-20 2004-07-29 Hilti Ag Gebirgsanker

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DE4201419C1 (en) * 1992-01-21 1993-08-19 Gd-Anker Gmbh, 3370 Seesen, De Rock anchor for location in rock with low cohesion factor - comprises outer bore anchor for making borehole and stabilising hole wall and injection anchor of hardenable material
JPH10220197A (ja) * 1996-11-13 1998-08-18 Gerhard Sauer 地質学的な構造物の固定方法および装置
DE20001930U1 (de) * 2000-02-05 2000-09-07 JORA-TEC GmbH Berg-, Tunnelbau und Felstechnik, 47441 Moers Injektionsanker
CH693934A5 (de) * 2003-10-09 2004-04-30 Kuechler Ankertechnik Gmbh Verfahren zum Bohren und Verfuellen von Loechern.
DE102008014700A1 (de) * 2008-03-18 2009-09-24 Dywidag-Systems International Gmbh Korrosionsgeschützter Selbstbohranker sowie Verfahren zu dessen Herstellung

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DE10301968A1 (de) 2003-01-20 2004-07-29 Hilti Ag Gebirgsanker

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3323556A1 (fr) 2016-11-17 2018-05-23 HILTI Aktiengesellschaft Appareil de fixation comprenant des arbres d'entraînement pouvant être bloqués axialement, procédé de fixation et ancre extensible associée
WO2018091313A1 (fr) 2016-11-17 2018-05-24 Hilti Aktiengesellschaft Appareil de pose à arbres d'entraînement verrouillables axiaux, procédé de pose et élément d'ancrage à expansion correspondant
CN109779665A (zh) * 2019-03-29 2019-05-21 攀枝花学院 钻锚一体化锚杆
CN114352330A (zh) * 2022-03-18 2022-04-15 应急管理部国家自然灾害防治研究院 一种用于防止地震对隧道冲击的注浆支护锚索设备
CN114892655A (zh) * 2022-04-29 2022-08-12 中交一公局集团有限公司 锚管组件
CN114892655B (zh) * 2022-04-29 2024-03-08 中交一公局集团有限公司 锚管组件

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Publication number Publication date
DE102010023627A1 (de) 2011-09-22
EP2366869A3 (fr) 2013-03-13
DE102010023627B4 (de) 2012-07-26

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