EP2785975B1 - Anchor, especially a rock anchor - Google Patents
Anchor, especially a rock anchor Download PDFInfo
- Publication number
- EP2785975B1 EP2785975B1 EP12772961.4A EP12772961A EP2785975B1 EP 2785975 B1 EP2785975 B1 EP 2785975B1 EP 12772961 A EP12772961 A EP 12772961A EP 2785975 B1 EP2785975 B1 EP 2785975B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- anchor
- anchor rod
- head element
- thread
- rod
- 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.)
- Not-in-force
Links
- 239000011435 rock Substances 0.000 title description 14
- 239000011343 solid material Substances 0.000 claims description 4
- 238000010079 rubber tapping Methods 0.000 description 9
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000007480 spreading Effects 0.000 description 3
- 239000002131 composite material Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000005065 mining Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 239000011083 cement mortar Substances 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000011429 hydraulic mortar Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 230000005226 mechanical processes and functions Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Images
Classifications
-
- 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
- E21D20/00—Setting anchoring-bolts
- E21D20/02—Setting anchoring-bolts with provisions for grouting
-
- 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
- E21D21/0046—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection characterised by constructional features of the bolts formed by a plurality of elements arranged longitudinally
-
- 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
- E21D21/008—Anchoring or tensioning means
Definitions
- the invention relates to an anchor, in particular a rock bolt, according to the preamble of claim 1.
- Such anchor is equipped with a self-tapping thread and an anchor rod, wherein in the anchor rod at least one axially extending feed channel is arranged for a curable composition, wherein at a first End of the anchor rod, a head element is attached to which the self-tapping thread is arranged.
- the borehole diameter required for the installation of an expansion head anchor is often relatively large, eg 32 to 34 mm for a 16 mm anchor rod, which may be due in particular to a relatively complex and space-demanding structure of the expansion head.
- the force introduction of a spreading head by its basic design possibly also by tolerance variations, often very punctually, so that under certain circumstances - especially in weak geology - the recordable compressive stresses of the surrounding mountains can be exceeded.
- spreader heads are in the not yet installed state of the anchor may not be very robust, since they are composed of several parts, which are often only loosely related. Only after activation of the spreading effect, the individual components are held together positively and positively. Under certain circumstances, this can cause the expansion sleeves to be damaged during transport of the anchors underground.
- the object of the invention is to provide an anchor, in particular rock anchors, which is particularly easy to use, inexpensive and reliable.
- a generic anchor in which at a first, in particular earth side, the end of the anchor rod, a head element is attached, on which the self-tapping thread is arranged according to the invention is characterized in that the head element is made of solid material and that the supply channel is closed by the head element is.
- the invention is based on a combination of a frictionally fixable screw anchor with a glued anchor and thus combines the advantages of a classic mining Sp DrSONankers that allows an immediate bond in the rock, a ringankersystems that allows small hole diameter and robust with few components, and one bonded composite system.
- a first basic idea of the invention can be seen therein to provide the essential elements of the glued composite anchor and the essential elements of the screw anchor each on separate elements: While the supply channel is located exclusively in the anchor rod, the self-tapping thread is exclusively at one of the anchor rod separate Element, namely the head element, arranged. Because of this separation, the anchor can be made particularly favorable with particularly high reliability.
- the outer diameter of the thread arranged on the head element is greater than the diameter of the anchor rod. This ensures a reliable setting process of the armature and a defined introduction of force before the introduction of the hardenable mass. It is particularly preferred that the core diameter of the thread arranged on the head element is greater than the diameter of the anchor rod.
- the head element can form an annular axial stop, which rests against the hardened mass, so that a particularly good introduction of tensile force is given.
- the feed channel and the thread are axially spaced.
- the production cost can be further reduced, since in this case anchor rod and head element can be geometrically very easily performed.
- the axial direction can be understood to mean the longitudinal direction of the armature, in particular its anchor rod.
- At least one, preferably radially extending, outlet bore is provided according to the invention in the anchor rod, which leads from the feed channel to the outside of the anchor rod.
- the outlet bore is conveniently located just before the first end of the anchor rod, i. before the end, where the head element is located. This may in particular include that the distance between the outlet bore and the first end is less than 10 times, 5 times or 1 times the diameter of the anchor rod. This is fluidically particularly advantageous. It can also be provided additional outlet holes whose distance from the first end is greater.
- the feed channel is closed by the head element, whereby the design effort can be further reduced.
- the head member not only serves as a carrier of the thread, but also has fluid mechanical function by sealing the feed channel at the end face of the anchor rod.
- the head element consists of solid material. This implies that the head element is solid.
- the anchor rod and / or the head element are preferably made of metal, in particular steel.
- the anchor rod which may also be referred to as an anchor tube due to the internal feed channel, is suitably butt-connected to the head element.
- the anchor rod and the head element are connected via a welded connection, in particular via a friction-welded connection. Due to the inventive geometry of individual parts such a connection in a particularly simple manner can be realized. Instead of a welded connection and a screw connection is possible.
- an anchor nut is arranged at an end region of the anchor rod facing away from the first end.
- the invention also relates to the intended use of the anchor, in which the anchor is received in a rock hole, wherein the thread of the head element is screwed into the rock hole surrounding rock and the anchor rod is surrounded by a hardened mass.
- the rock hole can be cylindrical or formed as a stepped bore.
- hardenable mass e.g., cement mortar
- the mass increases into the region of the first end of the anchor rod, then exits via the at least one radial outlet bore, and steadily fills the annulus down in the borehole until it emerges again at the borehole mouth.
- the self-tapping thread is provided exclusively on the head element and it does not extend to the anchor rod.
- the anchor rod may be formed on its outer lateral surface smooth or profiled in view of a particularly good introduction of force into the cured mass. If the anchor rod is profiled on its outer lateral surface, this profiling can also be formed thread-like. According to the invention, however, the thread-like profiling is formed with other thread parameters than the self-tapping thread on the head element, is formed discontinuously to the self-tapping thread and / or is in particular not self-tapping.
- FIG. 1 An embodiment of an inventive anchor is in FIG. 1 shown.
- the anchor is disposed in a rock hole 91 formed in rock 90.
- the armature has an approximately cylindrical anchor rod 10, at the first, borehole side End 31, a head element 20 is attached.
- the anchor rod 10 and the head element 20 are thereby butt connected via a Reibschweissimpl 26.
- the thread 21 On the outside of the cylindrical head element 20, a self-tapping external thread 21 is provided.
- the thread 21 has an outer diameter d a , which is greater than the inner diameter d h of the borehole 91, that is, that thread 21 is in the rock 90, which surrounds the borehole 91, cut.
- the core diameter d k of the thread 21, which is defined by the lateral surface of the cylindrical head member 20 is greater than the outer diameter d t of the anchor rod 10. At the transition between the smaller diameter anchor rod 10 and the larger diameter head element 20 an annular step 24 is formed.
- the anchor rod 10 Since the outer diameter d t of the anchor rod 10 in the hole 91 is smaller than the inner diameter d h of the wellbore 91, the anchor rod 10 is surrounded in the bore hole 91 by an annular space 96th
- This annular space 96 can be filled with a hardenable mass for additional securing of the armature, with the hardenable mass in particular being able to be introduced after the armature has been prestressed in the borehole 91.
- the anchor rod 10 designed as an anchor tube in its interior an axially, ie in the longitudinal direction of the anchor rod 10 extending feed channel 15, which is shown in the figure with dashed lines.
- this feed channel 15 opens at least one radially extending outlet bore 16, which is provided in the region of the first end 31 of the anchor rod 10, and which leads to the outside of the anchor rod 10.
- the anchor rod 10 is provided with an external thread on which an anchor nut 40 is arranged.
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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)
- Piles And Underground Anchors (AREA)
Description
Die Erfindung betrifft einen Anker, insbesondere einen Gesteinsanker, gemäss dem Oberbegriff des Anspruchs 1. Ein solcher Anker ist ausgestattet mit einem selbstschneidenden Gewinde und einer Ankerstange, wobei in der Ankerstange zumindest ein axial verlaufender Zuführkanal für eine aushärtbare Masse angeordnet ist, wobei an einem ersten Ende der Ankerstange ein Kopfelement befestigt ist, an dem das selbstschneidende Gewinde angeordnet ist.The invention relates to an anchor, in particular a rock bolt, according to the preamble of claim 1. Such anchor is equipped with a self-tapping thread and an anchor rod, wherein in the anchor rod at least one axially extending feed channel is arranged for a curable composition, wherein at a first End of the anchor rod, a head element is attached to which the self-tapping thread is arranged.
Im Miningbereich sind, beispielsweise aus der
Allerdings ist der Bohrlochdurchmesser, der für den Einbau eines Spreizkopfankers benötigt wird, häufig relativ groß, z.B. 32 bis 34 mm für eine 16 mm Ankerstange, was insbesondere an einem relativ komplexen und Platz beanspruchenden Aufbau des Spreizkopfes liegen kann. Unter Umständen kann es überdies Probleme beim Einschieben der relativ grossen Köpfe in das Bohrloch geben, insbesondere wenn das Bohrloch nicht völlig gerade oder nicht stabil ist. Darüber hinaus ist die Krafteinleitung eines Spreizkopfes durch seine prinzipielle Gestaltung, eventuell auch durch Toleranzschwankungen, häufig sehr punktuell, so dass unter Umständen - vor allem in schwacher Geologie - die aufnehmbaren Druckspannungen des umgebenden Gebirges überschritten werden können. Ferner sind Spreizköpfe im noch nicht eingebauten Zustand des Ankers unter Umständen nicht sehr robust, da sie aus mehreren Teilen zusammengesetzt sind, die häufig nur lose zusammenhängen. Erst nach Aktivierung der Spreizwirkung werden die Einzelkomponenten kraft- und formschlüssig zusammen gehalten. Dies kann unter Umständen dazu führen, dass die Spreizhülsen beim Transport der Anker unter Tage beschädigt werden.However, the borehole diameter required for the installation of an expansion head anchor is often relatively large, eg 32 to 34 mm for a 16 mm anchor rod, which may be due in particular to a relatively complex and space-demanding structure of the expansion head. In addition, there may be problems with the insertion of the relatively large heads into the borehole, in particular if the borehole is not completely straight or unstable. In addition, the force introduction of a spreading head by its basic design, possibly also by tolerance variations, often very punctually, so that under certain circumstances - especially in weak geology - the recordable compressive stresses of the surrounding mountains can be exceeded. Furthermore, spreader heads are in the not yet installed state of the anchor may not be very robust, since they are composed of several parts, which are often only loosely related. Only after activation of the spreading effect, the individual components are held together positively and positively. Under certain circumstances, this can cause the expansion sleeves to be damaged during transport of the anchors underground.
Es sind aus der
Aus der
Aus der
Aufgabe der Erfindung ist es, einen Anker, insbesondere Gesteinsanker, anzugeben, der besonders einfach in der Handhabung, kostengünstig und zuverlässig ist.The object of the invention is to provide an anchor, in particular rock anchors, which is particularly easy to use, inexpensive and reliable.
Die Aufgabe wird erfindungsgemäss durch einen Anker mit den Merkmalen des Anspruchs 1 gelöst. Bevorzugte Ausführungsformen sind in den abhängigen Ansprüchen angegeben.The object is achieved by an anchor with the features of claim 1. Preferred embodiments are given in the dependent claims.
Ein gattungsgemässer Anker, bei dem an einem ersten, insbesondere erdseitigen, Ende der Ankerstange ein Kopfelement befestigt ist, an dem das selbstschneidende Gewinde angeordnet ist, ist nach der Erfindung dadurch gekennzeichnet, dass das Kopfelement aus Vollmaterial besteht und dass der Zuführkanal durch das Kopfelement abgeschlossen ist.A generic anchor, in which at a first, in particular earth side, the end of the anchor rod, a head element is attached, on which the self-tapping thread is arranged according to the invention is characterized in that the head element is made of solid material and that the supply channel is closed by the head element is.
Die Erfindung basiert auf einer Kombination eines reibschlüssig festlegbaren Schraubankers mit einem verklebten Anker und vereint somit die Vorteile eines klassischen Bergbau-Spreizkopfankers, der einen sofortigen Verbund im Fels zulässt, eines Schraubankersystems, das kleine Bohrlochdurchmesser zulässt und mit wenigen Bauteilen robust ausgeführt ist, und eines verklebten Verbundsystems. Ein erster Grundgedanke der Erfindung kann dabei darin gesehen werden, die wesentlichen Elemente des verklebten Verbundankers und die wesentlichen Elemente des Schraubankers jeweils an separaten Elementen vorzusehen: Während sich der Zuführkanal ausschliesslich in der Ankerstange befindet, ist das selbstschneidende Gewinde ausschliesslich an einem von der Ankerstange separaten Element, nämlich dem Kopfelement, angeordnet. Aufgrund dieser Trennung kann der Anker bei besonders hoher Zuverlässigkeit besonders günstig gefertigt werden.The invention is based on a combination of a frictionally fixable screw anchor with a glued anchor and thus combines the advantages of a classic mining Spreizkopfankers that allows an immediate bond in the rock, a Schraubankersystems that allows small hole diameter and robust with few components, and one bonded composite system. A first basic idea of the invention can be seen therein to provide the essential elements of the glued composite anchor and the essential elements of the screw anchor each on separate elements: While the supply channel is located exclusively in the anchor rod, the self-tapping thread is exclusively at one of the anchor rod separate Element, namely the head element, arranged. Because of this separation, the anchor can be made particularly favorable with particularly high reliability.
Vorzugsweise ist der Aussendurchmesser des am Kopfelement angeordneten Gewindes grösser als der Durchmesser der Ankerstange. Hierdurch werden ein zuverlässiger Setzvorgang des Ankers und eine definierte Krafteinleitung vor dem Einbringen der aushärtbaren Masse gewährleistet. Besonders bevorzugt ist es, dass der Kerndurchmesser des am Kopfelement angeordneten Gewindes grösser ist als der Durchmesser der Ankerstange. Bei dieser Ausführungsform kann das Kopfelement einen ringförmigen Axialanschlag bilden, der an der ausgehärteten Masse anliegt, so dass eine besonders gute Zugkrafteinleitung gegeben ist.Preferably, the outer diameter of the thread arranged on the head element is greater than the diameter of the anchor rod. This ensures a reliable setting process of the armature and a defined introduction of force before the introduction of the hardenable mass. It is particularly preferred that the core diameter of the thread arranged on the head element is greater than the diameter of the anchor rod. In this embodiment, the head element can form an annular axial stop, which rests against the hardened mass, so that a particularly good introduction of tensile force is given.
Weiterhin ist es besonders bevorzugt, dass der Zuführkanal und das Gewinde axial beabstandet sind. Hierdurch kann der Herstellungsaufwand noch weiter gesenkt werden, da in diesem Fall Ankerstange und Kopfelement geometrisch besonders einfach ausgeführt werden können. Grundsätzlich ist es aber auch möglich, den Zuführkanal und das Gewinde axial überlappend auszuführen, beispielsweise indem am Kopfelement eine Ausnehmung für die Ankerstange vorgesehen wird. Unter der Axialrichtung kann erfindungsgemäss die Längsrichtung des Ankers, insbesondere seiner Ankerstange, verstanden werden.Furthermore, it is particularly preferred that the feed channel and the thread are axially spaced. As a result, the production cost can be further reduced, since in this case anchor rod and head element can be geometrically very easily performed. In principle, however, it is also possible to perform the feed channel and the thread axially overlapping, for example by providing a recess for the anchor rod on the head element. According to the invention, the axial direction can be understood to mean the longitudinal direction of the armature, in particular its anchor rod.
Zweckmässigerweise ist nach der Erfindung in der Ankerstange zumindest eine, vorzugsweise radial verlaufende, Auslassbohrung vorgesehen, die vom Zuführkanal an die Aussenseite der Ankerstange führt. Hierdurch kann der Ringraum um die Ankerstange in besonders einfacher und zuverlässiger Weise mit der aushärtbaren Masse befüllt werde. Die Auslassbohrung ist zweckmässigerweise kurz vor dem ersten Ende der Ankerstange, d.h. vor dem Ende, an dem sich das Kopfelement befindet, angeordnet. Dies kann insbesondere beinhalten, dass der Abstand zwischen der Auslassbohrung und dem ersten Ende kleiner ist als das 10-fache, 5-fache oder 1-fache des Durchmessers der Ankerstange. Dies ist strömungsmechanisch besonders vorteilhaft. Es können auch zusätzliche Auslassbohrungen vorgesehen sein, deren Abstand zum ersten Ende grösser ist.Conveniently, at least one, preferably radially extending, outlet bore is provided according to the invention in the anchor rod, which leads from the feed channel to the outside of the anchor rod. As a result, the annulus around the anchor rod will be filled in a particularly simple and reliable manner with the hardenable mass. The outlet bore is conveniently located just before the first end of the anchor rod, i. before the end, where the head element is located. This may in particular include that the distance between the outlet bore and the first end is less than 10 times, 5 times or 1 times the diameter of the anchor rod. This is fluidically particularly advantageous. It can also be provided additional outlet holes whose distance from the first end is greater.
Gemäss einem ersten Erfindungsgedanken ist der Zuführkanal durch das Kopfelement abgeschlossen, wodurch der konstruktive Aufwand weiter reduziert werden kann. Demgemäss dient das Kopfelement nicht nur als Träger des Gewindes, sondern es hat auch strömungsmechanische Funktion, indem es den Zuführkanal an der Stirnseite der Ankerstange abdichtet.According to a first concept of the invention, the feed channel is closed by the head element, whereby the design effort can be further reduced. Accordingly, the head member not only serves as a carrier of the thread, but also has fluid mechanical function by sealing the feed channel at the end face of the anchor rod.
Gemäss einem zweiten Erfindungsgedanken, der insbesondere im Hinblick auf eine besonders gute Kraftaufnahme und den Herstellungsaufwand vorteilhaft sein kann, besteht, das Kopfelement aus Vollmaterial. Dies beinhaltet, dass das Kopfelement massiv ausgebildet ist.According to a second idea of the invention, which may be advantageous in particular with regard to a particularly good force absorption and the production outlay, the head element consists of solid material. This implies that the head element is solid.
Die Ankerstange und/oder das Kopfelement bestehen vorzugsweise aus Metall, insbesondere Stahl. Die Ankerstange, die aufgrund des innen liegenden Zuführkanals auch als Ankerrohr bezeichnet werden kann, ist zweckmässigerweise stumpf mit dem Kopfelement verbunden. Beispielsweise im Hinblick auf die Fertigungskosten ist es vorteilhaft, dass die Ankerstange und das Kopfelement über eine Schweissverbindung, insbesondere über eine Reibschweissverbindung verbunden sind. Aufgrund der erfindungsgemässen Geometrie der einzelnen Teile ist eine solche Verbindung in besonders einfacher Art und Weise realisierbar. Anstelle einer Schweissverbindung ist auch eine Schraubverbindung möglich.The anchor rod and / or the head element are preferably made of metal, in particular steel. The anchor rod, which may also be referred to as an anchor tube due to the internal feed channel, is suitably butt-connected to the head element. For example, in view of the manufacturing costs, it is advantageous that the anchor rod and the head element are connected via a welded connection, in particular via a friction-welded connection. Due to the inventive geometry of individual parts such a connection in a particularly simple manner can be realized. Instead of a welded connection and a screw connection is possible.
Zum Vorspannen des Ankers oder/und zur Befestigung weiterer Elemente ist es vorteilhaft, dass an einem dem ersten Ende abgewandten Endbereich der Ankerstange eine Ankermutter angeordnet ist.For biasing the armature and / or for fastening further elements, it is advantageous that an anchor nut is arranged at an end region of the anchor rod facing away from the first end.
Die Erfindung betrifft auch den bestimmungsgemässen Einsatz des Ankers, bei dem der Anker in einem Gesteinsbohrloch aufgenommen ist, wobei das Gewinde des Kopfelementes in das Gesteinsbohrloch umgebendes Gestein eingedreht ist und die Ankerstange von einer ausgehärteten Masse umgeben ist. Das Gesteinsbohrloch kann zylindrisch oder als Stufenbohrung ausgebildet sein. Nach dem Einschrauben des Ankers in das vorgebohrte Bohrloch wird aushärtbare Masse (z.B. Zementmörtel) über den Zuführkanal im Inneren der Ankerstange eingebracht. Die Masse steigt bis in den Bereich des ersten Endes der Ankerstange, tritt dann über die zumindest eine radiale Auslassbohrung aus, und verfüllt den Ringraum im Bohrloch stetig nach unten, bis sie am Bohrlochmund wieder austritt.The invention also relates to the intended use of the anchor, in which the anchor is received in a rock hole, wherein the thread of the head element is screwed into the rock hole surrounding rock and the anchor rod is surrounded by a hardened mass. The rock hole can be cylindrical or formed as a stepped bore. After screwing the anchor into the pre-drilled wellbore, hardenable mass (e.g., cement mortar) is introduced via the feed channel inside the anchor rod. The mass increases into the region of the first end of the anchor rod, then exits via the at least one radial outlet bore, and steadily fills the annulus down in the borehole until it emerges again at the borehole mouth.
Erfindungsgemäss ist das selbstschneidende Gewinde ausschliesslich am Kopfelement vorgesehen und es erstreckt sich nicht auf die Ankerstange. Die Ankerstange kann an ihrer äusseren Mantelfläche glatt oder im Hinblick auf eine besonders gute Krafteinleitung in die ausgehärtete Masse auch profiliert ausgebildet sein. Sofern die Ankerstange an ihrer äusseren Mantelfläche profiliert ist, kann dieser Profilierung auch gewindeartig ausgebildet sein. Nach der Erfindung ist die gewindeartige Profilierung aber mit anderen Gewindeparametern ausgebildet als das selbstschneidende Gewinde am Kopfelement, ist diskontinuierlich zum selbstschneidenden Gewinde ausgebildet und/oder ist insbesondere nicht selbstschneidend.According to the invention, the self-tapping thread is provided exclusively on the head element and it does not extend to the anchor rod. The anchor rod may be formed on its outer lateral surface smooth or profiled in view of a particularly good introduction of force into the cured mass. If the anchor rod is profiled on its outer lateral surface, this profiling can also be formed thread-like. According to the invention, however, the thread-like profiling is formed with other thread parameters than the self-tapping thread on the head element, is formed discontinuously to the self-tapping thread and / or is in particular not self-tapping.
Die Erfindung wird nachfolgend anhand eines bevorzugten Ausführungsbeispiels näher erläutert, welches schematisch in der beiliegenden Figur dargestellt ist. Es zeigt schematisch:
- Figur 1:
- Eine Seitenansicht eines erfindungsgemässen Ankers in einem Gesteinsbohrloch, wobei das Gestein, welches das Gesteinsbohrloch umgibt, geschnitten dargestellt ist.
- FIG. 1:
- A side view of an inventive anchor in a rock hole, wherein the rock surrounding the rock well is shown cut.
Ein Ausführungsbeispiel eines erfindungsgemässen Ankers ist in
Aussenseitig am zylindrischen Kopfelement 20 ist ein selbstschneidendes Aussengewinde 21 vorgesehen. Das Gewinde 21 weist einen Aussendurchmesser da auf, der grösser ist als der Innendurchmesser dh des Bohrlochs 91, das heisst dass Gewinde 21 ist in das Gestein 90, welches das Bohrloch 91 umgibt, eingeschnitten.On the outside of the
Der Kerndurchmesser dk des Gewindes 21, der durch die Mantelfläche des zylindrischen Kopfelements 20 definiert wird, ist grösser als der Aussendurchmesser dt der Ankerstange 10. Am Übergang zwischen der durchmesserkleineren Ankerstange 10 und dem durchmessergrösseren Kopfelement 20 eine Ringstufe 24 gebildet.The core diameter d k of the
Da der Aussendurchmesser dt der Ankerstange 10 im Bohrloch 91 kleiner ist als der Innendurchmesser dh des Bohrlochs 91, ist die Ankerstange 10 im Bohrloch 91 von einem Ringraum 96 umgeben. Dieser Ringraum 96 ist zur zusätzlichen Sicherung des Ankers mit einer aushärtbaren Masse verfüllbar, wobei die aushärtbare Masse insbesondere eingebracht werden kann, nachdem der Anker im Bohrloch 91 vorgespannt wurde. Zum Einbringen der aushärtbaren Masse in den Ringraum 96 weist die als Ankerrohr ausgebildete Ankerstange 10 in ihrem Inneren einen axial, d.h. in Längsrichtung der Ankerstange 10 verlaufenden Zuführkanal 15 auf, der in der Figur mit Strichlinien dargestellt ist. In diesen Zuführkanal 15 mündet zumindest eine radial verlaufende Auslassbohrung 16, die im Bereich des ersten Endes 31 der Ankerstange 10 vorgesehen ist, und die an die Aussenseite der Ankerstange 10 führt.Since the outer diameter d t of the
Am luftseitigen Endbereich 32 der Ankerstange 10, der dem ersten Ende 31 der Ankerstange gegenüberliegt, ist die Ankerstange 10 mit einem Aussengewinde versehen, an dem eine Ankermutter 40 angeordnet ist.At the air-side end region 32 of the
Claims (6)
- Anchor, comprising a self-cutting thread (21) and an anchor rod (10), wherein at least one axially disposed supply channel (15) for a hardenable mass is arranged in the anchor rod (10),
wherein a head element (20) on which the self-cutting thread (21) is arranged is fastened to a first end (31) of the anchor rod (10), characterised in that
the head element (20) is made of solid material and
in that the supply channel (15) is occluded by the head element (20). - Anchor according to Claim 1,
characterised in that
the core diameter of the thread (21) arranged on the head element (20 is larger than the diameter of the anchor rod (10). - Anchor according to either of the preceding claims,
characterised in that
the supply channel (15) and the thread (21) are spaced apart axially. - Anchor according to any one of the preceding claims,
characterised in that
at least one outlet bore (16) leading from the supply channel (15) to the outside of the anchor rod (10) is provided in the anchor rod (10). - Anchor according to any one of the preceding claims,
characterised in that
the anchor rod (10) and the head element (20) are connected by means of a welded connection, in particular a frictional-welded connection (26). - Anchor according to any one of the preceding claims,
characterised in that
an anchor nut (40) is arranged on an end region (32) of the anchor rod (10) oriented away from the first end (31).
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102011087178A DE102011087178A1 (en) | 2011-11-28 | 2011-11-28 | Anchors, in particular rock anchors |
PCT/EP2012/070546 WO2013079254A2 (en) | 2011-11-28 | 2012-10-17 | Anchor, especially a rock anchor |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2785975A2 EP2785975A2 (en) | 2014-10-08 |
EP2785975B1 true EP2785975B1 (en) | 2017-07-12 |
Family
ID=47022697
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP12772961.4A Not-in-force EP2785975B1 (en) | 2011-11-28 | 2012-10-17 | Anchor, especially a rock anchor |
Country Status (5)
Country | Link |
---|---|
US (1) | US9664042B2 (en) |
EP (1) | EP2785975B1 (en) |
KR (1) | KR20140094027A (en) |
DE (1) | DE102011087178A1 (en) |
WO (1) | WO2013079254A2 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20190358335A1 (en) | 2017-01-12 | 2019-11-28 | Alan J. Russell | Stomach acid-stable and mucin-binding protein-polymer conjugates |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1892426A1 (en) * | 2005-06-13 | 2008-02-27 | Aoyama Seisakusho Co., Ltd. | Bolt |
WO2009079684A1 (en) * | 2007-12-21 | 2009-07-02 | Alminco Pty Ltd | Self drilling rock bolting |
Family Cites Families (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2993950A (en) * | 1959-06-17 | 1961-07-25 | Formar Ind Inc | Self-tapping non-conductive fastener |
DE2063843C3 (en) | 1970-12-24 | 1975-07-03 | Kali Und Salz Ag, 3500 Kassel | Tie bolt for suspending loads in salt deposits |
US4553279A (en) * | 1983-10-17 | 1985-11-19 | Gassew Garry L | Multi-purpose paint stick |
DE3840158A1 (en) * | 1988-11-29 | 1990-05-31 | Gd Anker Gmbh & Co Kg | METHOD FOR SETTING AN ANCHOR AND DEVICE FOR IMPLEMENTING THE METHOD |
ES2106789T3 (en) * | 1990-10-29 | 1997-11-16 | Bhp Eng Pty Ltd | BOLTS TO CONSOLIDATE ROCK SELF-TAPPING, AS WELL AS SELF-TAPPING AND SELF-DRILLING. |
DE19608859A1 (en) * | 1996-03-07 | 1997-09-11 | Hilti Ag | Anchor rod for composite anchors |
DE29707502U1 (en) | 1997-04-25 | 1997-06-19 | Gebr. Van Leeuwen Harmelen B.V., Harmelen | Screw injection anchor |
US6457909B1 (en) * | 2000-12-22 | 2002-10-01 | Shulin Xu | Multi-purpose anchor bolt assembly |
BRPI0618483A2 (en) | 2005-11-09 | 2011-08-30 | Sandvik Intellectual Property | rock self-drilling screw |
DE102006000412A1 (en) * | 2006-08-23 | 2008-02-28 | Hilti Ag | Fixing element for hard surfaces |
DE102007000829A1 (en) | 2007-10-08 | 2009-04-09 | Hilti Aktiengesellschaft | fastener |
FR2940807B1 (en) * | 2009-01-06 | 2011-02-04 | Ancrest Sa | DEVICE FOR ANCHORING IN A SOIL |
US8721227B2 (en) * | 2009-09-01 | 2014-05-13 | Fci Holdings Delaware, Inc. | Yielding bolt and assembly |
DE102010002214A1 (en) * | 2010-02-23 | 2011-08-25 | Hilti Aktiengesellschaft | Reinforcement and / or anchor bolt |
-
2011
- 2011-11-28 DE DE102011087178A patent/DE102011087178A1/en not_active Withdrawn
-
2012
- 2012-10-17 US US14/360,755 patent/US9664042B2/en active Active
- 2012-10-17 WO PCT/EP2012/070546 patent/WO2013079254A2/en active Application Filing
- 2012-10-17 KR KR1020147017690A patent/KR20140094027A/en not_active Application Discontinuation
- 2012-10-17 EP EP12772961.4A patent/EP2785975B1/en not_active Not-in-force
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1892426A1 (en) * | 2005-06-13 | 2008-02-27 | Aoyama Seisakusho Co., Ltd. | Bolt |
WO2009079684A1 (en) * | 2007-12-21 | 2009-07-02 | Alminco Pty Ltd | Self drilling rock bolting |
Also Published As
Publication number | Publication date |
---|---|
WO2013079254A2 (en) | 2013-06-06 |
KR20140094027A (en) | 2014-07-29 |
US20140334885A1 (en) | 2014-11-13 |
DE102011087178A1 (en) | 2013-05-29 |
US9664042B2 (en) | 2017-05-30 |
WO2013079254A3 (en) | 2013-12-05 |
EP2785975A2 (en) | 2014-10-08 |
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