EP3690187B1 - Pre-loadable ground anchor - Google Patents

Pre-loadable ground anchor Download PDF

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Publication number
EP3690187B1
EP3690187B1 EP14450046.9A EP14450046A EP3690187B1 EP 3690187 B1 EP3690187 B1 EP 3690187B1 EP 14450046 A EP14450046 A EP 14450046A EP 3690187 B1 EP3690187 B1 EP 3690187B1
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EP
European Patent Office
Prior art keywords
anchor
tension members
tension
loadable
tensioning
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.)
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EP14450046.9A
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German (de)
French (fr)
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EP3690187A1 (en
Inventor
Richard GUTSCHE
Gerold BRANDSTÄTTER
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.)
Porr Bau GmbH
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Porr Bau GmbH
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Priority to PL14450046T priority Critical patent/PL3690187T3/en
Publication of EP3690187A1 publication Critical patent/EP3690187A1/en
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Publication of EP3690187B1 publication Critical patent/EP3690187B1/en
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Classifications

    • 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
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
    • E02D5/74—Means for anchoring structural elements or bulkheads
    • E02D5/80—Ground anchors
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
    • E02D5/74—Means for anchoring structural elements or bulkheads
    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
    • E02D5/74—Means for anchoring structural elements or bulkheads
    • E02D5/80—Ground anchors
    • E02D5/808—Ground anchors anchored by using exclusively a bonding material
    • 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
    • E21D21/0053—Anchoring-bolts in the form of lost drilling rods
    • 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
    • E21D21/0066—Anchoring-bolts formed by a bundle of radially arranged rigid elements

Definitions

  • the invention relates to a pre-tensionable grout anchor according to the preamble of claim 1.
  • Grout anchors are known which are intended to transmit an applied tensile force to a layer in the subsurface.
  • the grout anchor has a grout body which is arranged in the ground and which is connected to an anchor head via tension members.
  • the anchor head is connected to the structure to be held or rests on it, which is anchored to the ground by means of the prestressed tension members.
  • Such grout anchors can be used as temporary anchors or as permanent anchors.
  • a prestressable grout anchor with anchor tension members made of a non-metallic material is known, one end of the anchor tension members being connected to a coupling device with an adhesive, a tension tension member for tensioning the prestressable grout anchor being indirectly connected to the coupling device and one end of the anchor tension members being embedded in the adhesive .
  • the anchor tension members comprising a non-metallic fiber material and the anchor tension members being glued to the coupling device at one end with an adhesive.
  • the anchor tension members comprising a non-metallic fiber material and being glued to the coupling device at one end with an adhesive.
  • Fiber optic cables as tension members, as these are easier to cut than tension members made of steel or other metals, which is why they can remain in the ground without any problems.
  • the object of the invention is therefore to provide a pre-stressable grout anchor of the type mentioned at the beginning, with which the mentioned disadvantages can be avoided, which is easy to handle and can be pre-stressed with conventional means.
  • anchor tension members By using a non-metallic fiber material as anchor tension members, they can remain in the ground without any problems even after the excavation has been dismantled, as they can be easily separated. Furthermore, a compact design can thereby be achieved, whereby the diameter of the borehole can be kept small.
  • a particularly simple but also durable coupling of the anchor tension members with the coupling device can be effected, whereby damage to the anchor tension members can be avoided, which would be the case, for example, with a purely mechanical connection such as clamps.
  • the Figs. 1 to 3 show a pre-stressable grout anchor 1 comprising a plurality of anchor tension members 2 according to the invention.
  • a grout anchor 1 is also referred to as a prestressed anchor or a ground or rock anchor.
  • the ground anchor 1 is a geotechnical component which transmits an applied tensile force into the subsoil 10.
  • a borehole 11 is made in the subsurface 10
  • the anchor tension members 2 are introduced into the bore hole 11 and then the anchor tension members 2 are anchored in the bore hole 11 by means of a grouting body 12.
  • the grout 12 can be made of cement, concrete or the like.
  • the anchor tension members 2 comprise a non-metallic fiber material.
  • a non-metallic fiber material can in particular be glass fiber cables.
  • Fiber optic cables offer the advantage that they have a high tensile strength, are chemically resistant and are easy to manufacture.
  • carbon fibers, plastic fibers, for example made of aramid or nylon, natural fibers, ceramic fibers or similar material can be used for the anchor tension members 2.
  • the anchor tension members 2 can in particular comprise a composite material comprising non-metallic fiber material.
  • the anchor tension members 2 are glued to a coupling device 4 at one end 6 by means of an adhesive 3, and a tension tension member 5 for tensioning the pre-tensionable grout anchor 1 is at least indirectly connected to the coupling device 4.
  • the coupling device 4 connects the anchor tension members 2 to a tension tension member 5, the tension tension member 5 proceeding to be tensioned with a tensioning device 9.
  • the tension member 5 can in particular be made of metal, in particular steel.
  • the tension member 5 is designed as a steel tension member.
  • anchor tension members 2 are essentially glued to their lateral surfaces.
  • the adhesive point is subjected to thrust and not tensile stress, which means that it can absorb particularly high forces.
  • another end 13 of the anchor tension members that is to say an end 13 of the anchor tension members 2 opposite the end 6 bonded to the coupling device 4, can be in direct contact with the grout body 12.
  • the grout anchor 1 can in particular be designed as a short-term anchor or as a temporary grout anchor. Such grout anchors 1 are provided for a period of use of only a few years. By using the non-metallic fiber material, the anchor tension members 2 can remain in the subsurface 10, which means that the dismantling effort can be significantly reduced.
  • the grout anchor 1 is designed as a permanent anchor.
  • Such grout anchors 1 are provided for a long period of use, for example at least a hundred years.
  • the anchor tension members 2 comprising non-metallic fiber material can be more corrosion-resistant than anchor tension members 2 made of metal.
  • the pressing body 12 can essentially only be arranged adjacent to the other end 13 of the anchor tension members 2.
  • the grouting body 12 essentially fills the entire borehole 11.
  • a preferred embodiment of the pre-tensionable grout anchor 1 is shown, the grout body 12 not being shown.
  • the complete grout anchor 1 is shown, which is arranged in the borehole 11. It can particularly preferably be provided that a free-running section 14 is arranged between the one end 6 and the other end 13 of the anchor tension members 2.
  • the anchor tension members 2 can be arranged in a sleeve 15, in particular in a plastic sleeve, so as to be freely movable in the longitudinal direction thereof.
  • the sheath 15 can enclose individual anchor tension members 2 or an entire strand of anchor tension members 2.
  • the anchor tension members 2 can transfer the tensile forces from the coupling device 4 to the grouting body 12 without hindrance, with the anchor tension members 2 also being able to expand unhindered under the pretension in the freewheeling section 14. Due to the sheath 15, the anchor tension members 2 in the freewheeling section 14 are not in contact with the grouting body 12.
  • the anchor tension members 2 have a length between 3 m and 20 m.
  • anchor tension members 2 are essentially of the same length.
  • a length of the freewheeling section 14 is greater than the areas which represent one end 6 and the other end 13 of the anchor tension members 2.
  • anchor tension members 2 run parallel to one another.
  • the anchor tension members 2 are at least four times as long as the tension tension member 5.
  • the anchor tension members 2 can be left in the subsurface 10, while in the case of a short-term anchor only the shorter tension tension member 5 has to be removed.
  • the adhesive 3 is a resin, preferably a synthetic resin, in particular an epoxy resin.
  • Resins have the advantage that they can be easily implemented by means of casting.
  • epoxy resin is water-resistant.
  • one end 6 of the anchor tension members 2 in the Adhesive 3 is embedded.
  • a particularly large adhesive surface can be achieved here. Furthermore, the penetration of fluids causing corrosion into the coupling device 4 and the areas below it can be prevented.
  • the coupling device 4 has a sleeve 7, and one end 6 of the anchor tension members 2 is arranged within the sleeve 7.
  • the sleeve 7, which in Fig. 1 and Fig. 3 is shown partially cut away, surrounds the ends 6 of the anchor tension members 2 and is glued to them by means of the adhesive 3.
  • a good integration of the ends 6 of the anchor tension members 2 can be achieved through the sleeve 7, wherein the sleeve 7 can provide a defined area which can be filled with the adhesive 3.
  • the sleeve 7 can in particular be designed to include metal and / or plastic.
  • the sleeve 7 can in particular have a hollow cylindrical shape.
  • the coupling device 4 has a length of less than 2 m. As a result, it can easily be removed from the substrate 10 again in the case of a short-term anchor.
  • the length of the sleeve 7 can essentially correspond to the length of the coupling device 4.
  • the anchor tension members 2 extend essentially over the entire length of the sleeve 7 in the sleeve 7.
  • the anchor tension members 2 can be arranged in the sleeve over the entire length of the sleeve 7. As a result, a particularly large adhesive surface can be provided.
  • the grout anchor 1 has only one tension member 5.
  • One tension member 5 can be designed as a strand, rod or rope.
  • the grout anchor 1 has several tension members.
  • the number of anchor tension members 2 is greater than the number of tension tension members 5.
  • a first region 8 of the tension member 5 is arranged inside the sleeve 7.
  • the first area 8 of the tension tension member 5 and the one ends 6 of the anchor tension members 2 can be arranged in an overlapping manner in the sleeve 7, whereby a particularly good transmission of force through the adhesive 3 is possible.
  • a second region 16 of the tensioning tension member 5 of the tensioning tension member can be provided which can be tensioned with a tensioning device 9.
  • the clamping device 9 is provided for applying and holding the clamping force.
  • the tensioning tension member 5 has a thread for engaging a tensioning device 9.
  • the tensioning device 9 can in particular have an internal thread, whereby the tensioning force can be adjusted by turning the tensioning device 9 and the pre-tensionable grout anchor 1 can be easily re-tensioned.
  • the tensioning tension member 5 is designed as a threaded rod.
  • the clamping device 9 is provided as a perforated plate with wedges.
  • the tension member 5 can be tensioned by means of an external device and then fixed in the perforated plate with the wedges in the pre-tensioned situation.
  • the anchor tension members 2 are arranged in a substantially uniformly distributed manner around the first region 8 of the tension tension member 5.
  • the coupling device 4 can thereby be designed in a particularly simple and space-saving manner.
  • Such an arrangement is in Fig. 2 shown, wherein the individual strands of the anchor tension members 2 are arranged in a circular arrangement around the central tension member 5.
  • the tension member can in particular be arranged coaxially to the sleeve 4.
  • the pre-tensionable grout anchor 1 has at least three anchor tension members 2, in particular five to twenty anchor tension members 2.
  • the introduction of force can be passed on particularly evenly via the individual anchor tension members 2 to a centrally arranged tension tension member 5.
  • a diameter of the tension tension member 5 is greater than a diameter of the anchor tension members 2.
  • the anchor tension members 2 can be arranged better circumferentially around the tension tension member 5, as a result of which a uniform transmission of force is improved.
  • the tension member 5 is glued directly to the coupling device 4 by means of the adhesive 3.
  • the use of additional connecting means can be dispensed with, as a result of which the coupling of the tensioning tension member 5 to the coupling device 4 can be made particularly simple.
  • the tensioning tension member 5 is essentially glued to its outer surface.
  • the tension tension member 5 and the anchor tension members 2 are jointly embedded in an adhesive formed as a resin. Such a connection is in Fig. 2 shown, wherein the tension member 5 and the annularly arranged anchor tension members 2 are embedded in the resin.
  • the coupling device 4 has a connecting device, and that the tensioning tension member 5 is connected to the connecting device.
  • the connecting device can in particular be designed for releasably connecting the tensioning tension member 5.
  • the connecting device can be designed as a threaded sleeve into which the tensioning tension member 5 is screwed.
  • the connecting device can be attached to the sleeve 7.
  • the connecting device has the advantage that the tensioning tension member 5 can easily be detached from the coupling device 4, as a result of which the dismantling of the grout anchor 1 can be made particularly simple.
  • an injection tube passes through the sleeve 7.
  • the injection tube is used to bring the material for the grout body 12 to the ground of the borehole 11 to direct.
  • the injection tube can be passed between the tension member 5 and the anchor members 2 through the sleeve 7 and embedded there. This enables a particularly compact design to be achieved.

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  • Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Paleontology (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Piles And Underground Anchors (AREA)

Description

Die Erfindung betrifft einen vorspannbaren Verpressanker gemäß dem Oberbegriff des Patentanspruches 1.The invention relates to a pre-tensionable grout anchor according to the preamble of claim 1.

Es sind Verpressanker bekannt, welche dazu vorgesehen sind eine aufgebrachte Zugkraft auf eine Schicht im Untergrund zu übertragen. Hierbei weist der Verpressanker einen im Untergrund angeordneten Verpresskörper auf, welcher über Zugglieder mit einem Ankerkopf verbunden sind. Der Ankerkopf ist hierbei mit der zu haltenden Konstruktion verbunden oder liegt an dieser auf, welche dadurch mittels den vorgespannten Zugglieder mit dem Untergrund verankert ist. Derartige Verpressanker können hierbei als temporärer Anker oder als Daueranker eingesetzt werden.Grout anchors are known which are intended to transmit an applied tensile force to a layer in the subsurface. Here, the grout anchor has a grout body which is arranged in the ground and which is connected to an anchor head via tension members. The anchor head is connected to the structure to be held or rests on it, which is anchored to the ground by means of the prestressed tension members. Such grout anchors can be used as temporary anchors or as permanent anchors.

Aus der JP H05 33336 A ist ein vorspannbarer Verpressanker mit Ankerzuggliedern aus einem nichtmetallischen Material bekannt, wobei ein Ende der Ankerzugglieder mit einem Klebstoff an einer Kopplungsvorrichtung verbunden ist, wobei ein Spannzugglied zum Spannen des vorspannbaren Verpressankers mittelbar mit der Kopplungsvorrichtung verbunden ist und ein Ende der Ankerzugglieder in dem Klebstoff eingebettet ist.From the JP H05 33336 A a prestressable grout anchor with anchor tension members made of a non-metallic material is known, one end of the anchor tension members being connected to a coupling device with an adhesive, a tension tension member for tensioning the prestressable grout anchor being indirectly connected to the coupling device and one end of the anchor tension members being embedded in the adhesive .

Aus der JP H07 42380 U ist ein vorspannbarer Verpressanker mit Ankerzuggliedern bekannt, wobei die Ankerzugglieder ein nichtmetallisches Fasermaterial umfassen und die Ankerzugglieder an einem Ende mit einem Klebstoff mit der Kopplungsvorrichtung verklebt sind.From the JP H07 42380 U a prestressable grout anchor with anchor tension members is known, the anchor tension members comprising a non-metallic fiber material and the anchor tension members being glued to the coupling device at one end with an adhesive.

Aus der JP H11 193526 A ist ein vorspannbarer Verpressanker mit Ankerzuggliedern bekannt, wobei die Ankerzugglieder ein nichtmetallisches Fasermaterial umfassen und an einem Ende mit einem Klebstoff mit der Koppelungsvorrichtung verklebt sind.From the JP H11 193526 A a prestressable grout anchor with anchor tension members is known, the anchor tension members comprising a non-metallic fiber material and being glued to the coupling device at one end with an adhesive.

Für die Zugglieder wird bei herkömmlichen Verpressanker üblicherweise Stahl verwendet. Hierbei ergibt sich allerdings der Nachteil, dass aus ein Zugglied aus Stahl bei einem temporären Anker, welcher beispielsweise zur Sicherung einer Baugrube eingesetzt wird, nicht im Erdreich verbleiben darf. Dies ist insbesondere im urbanen Gebiet von Bedeutung, da hier die Zugglieder oft in Nachbargrundstücke ragen. Ein Zugglied aus Stahl stellt hierbei beim Ausheben einer anderen Grube oder dem Vorantreiben eines Kanals oder eines Tunnels ein wesentliches Hindernis dar, da es für herkömmliche Baumaschinen nur schwer zu durchtrennen ist.Steel is usually used for the tension members in conventional grout anchors. However, this results in the disadvantage that a tension member made of steel in a temporary anchor, which is used, for example, to secure an excavation, must not remain in the ground. This is particularly important in urban areas, since here the tension members often protrude into neighboring properties. A tension member made of steel is a major obstacle when digging another pit or driving a canal or tunnel, as it is difficult to cut through for conventional construction machinery.

Eine mögliche Lösung dieses Problems besteht in der Verwendung von Glasfaserkabeln als Zugglieder, da diese leichter zu durchtrennen sind als Zugglieder aus Stahl oder anderen Metallen, weshalb diese ohne Probleme im Untergrund verbleiben dürfen.One possible solution to this problem is to use fiber optic cables as tension members, as these are easier to cut than tension members made of steel or other metals, which is why they can remain in the ground without any problems.

Nachteilig bei bekannten Verpressankern mit Glasfaserkabeln als Zugglieder ist allerdings, dass diese wesentlich aufwendiger in der Handhabe sind und aufwendige Konstruktionen zum Vorspannen benötigen.However, the disadvantage of known grout anchors with glass fiber cables as tension members is that they are considerably more complex to handle and require complex structures for prestressing.

Aufgabe der Erfindung ist es daher einen vorspannbaren Verpressanker der eingangs genannten Art anzugeben, mit welchem die genannten Nachteile vermieden werden können, welcher einfach in der Handhabe ist und mit herkömmlichen Mitteln vorgespannt werden kann.The object of the invention is therefore to provide a pre-stressable grout anchor of the type mentioned at the beginning, with which the mentioned disadvantages can be avoided, which is easy to handle and can be pre-stressed with conventional means.

Erfindungsgemäß wird dies durch die Merkmale des Patentanspruches 1 erreicht.According to the invention, this is achieved by the features of claim 1.

Dadurch ergibt sich der Vorteil, dass ein vorspannbarer Verspressanker mit Zuggliedern aus einem nichtmetallischen Fasermaterial mit herkömmlichen Mitteln gespannt werden kann. Durch die Koppelungsvorrichtung, mit welcher die Zugglieder verklebt sind, kann ein einfacher und leicht herzustellender Übergang auf ein herkömmlichen Spannzugglied geschaffen werden, wobei mittels dem Spannzuggliedes der Verpressanker mit den herkömmlichen Methoden und Gerätschaften vorgespannt werden kann. Dadurch ergibt sich für den Benützer, dass dieser bei der Verwendung des gegenständlichen Verspressankers die gleichen Geräte zum Verspannen verwenden kann wie bei herkömmlichen Verpressanker mit Stahlzugglieder. Dadurch kann beispielsweise der Geräteeinsatz bei einer Baugrube gering gehalten werden, wobei auf zugelassene und bewährte Methoden und Geräte zum Vorspannen zurückgegriffen werden kann. Durch die Verwendung eines nichtmetallischen Fasermaterials als Ankerzugglieder können diese selbst nach Abbau der Baugrube problemlos im Untergrund verbleiben, da diese leicht durchtrennbar sind. Weiters kann dadurch eine kompakte Bauform erreicht werden, wodurch der Durchmesser des Bohrloches gering gehalten werden kann. Durch die Klebeverbindung kann hierbei eine besonders einfach ausgebildete aber auch haltbare Koppelung der Ankerzugglieder mit der Koppelungsvorrichtung bewirkt werden, wobei eine Beschädigung der Ankerzugglieder vermieden werden kann, welche beispielsweise bei einer rein mechanischen Verbindung wie Klemmen gegeben wäre.This has the advantage that a pre-tensionable compression anchor with tension members made of a non-metallic fiber material can be tensioned using conventional means. By means of the coupling device with which the tension members are glued, a simple and easy-to-produce transition to a conventional tension member can be created, whereby the grout anchor can be prestressed using conventional methods and equipment by means of the tension member. This means that the user can use the same devices for bracing when using the pressure anchor in question as with conventional pressure anchors with steel tension members. In this way, for example, the use of equipment in a construction pit can be kept to a minimum, whereby approved and proven methods and devices for prestressing can be used. By using a non-metallic fiber material as anchor tension members, they can remain in the ground without any problems even after the excavation has been dismantled, as they can be easily separated. Furthermore, a compact design can thereby be achieved, whereby the diameter of the borehole can be kept small. Through the adhesive connection, a particularly simple but also durable coupling of the anchor tension members with the coupling device can be effected, whereby damage to the anchor tension members can be avoided, which would be the case, for example, with a purely mechanical connection such as clamps.

Die Unteransprüche betreffen weitere vorteilhafte Ausgestaltungen der Erfindung.The subclaims relate to further advantageous embodiments of the invention.

Ausdrücklich wird hiermit auf den Wortlaut der Patentansprüche Bezug genommen, wodurch die Ansprüche an dieser Stelle durch Bezugnahme in die Beschreibung eingefügt sind und als wörtlich wiedergegeben gelten.Express reference is hereby made to the wording of the patent claims, whereby the claims are inserted into the description at this point by reference and are considered to be reproduced verbatim.

Die Erfindung wird unter Bezugnahme auf die beigeschlossenen Zeichnungen, in welchen lediglich eine bevorzugte Ausführungsform beispielhaft dargestellt ist, näher beschrieben. Dabei zeigt:

  • Fig. 1 einen Teil einer bevorzugten Ausführungsform des vorspannbaren Verpressankers als Schnitt in Seitenansicht;
  • Fig. 2 den Schnitt A-A in Fig. 1;
  • Fig. 3 die bevorzugte Ausführungsform des vorspannbaren Verpressankers als Schnitt in Seitenansicht.
The invention is described in more detail with reference to the accompanying drawings, in which only one preferred embodiment is shown by way of example. It shows:
  • Fig. 1 part of a preferred embodiment of the prestressable Grout anchor as a section in side view;
  • Fig. 2 the section AA in Fig. 1 ;
  • Fig. 3 the preferred embodiment of the pre-tensionable grout anchor as a section in side view.

Die Fig. 1 bis 3 zeigen einen vorspannbaren Verpressanker 1 umfassend eine Mehrzahl an Ankerzugglieder 2 gemäß der Erfindung. Ein Verpressanker 1 wird auch als vorgespannter Anker oder als Erd- oder Felsanker bezeichnet. Der Verpressanker 1 ist ein Bauteil der Geotechnik, welches eine aufgebrachte Zugkraft in den Untergrund 10 weiterleitet. Hierbei wird ein Bohrloch 11 in den Untergrund 10 eingebracht, die Ankerzugglieder 2 in das Bohrloch 11 eingebracht und dann die Ankerzugglieder 2 im Bohrloch 11 mittels eines Verpresskörpers 12 verankert. Der Verpresskörpers 12 kann hierbei aus Zement, Beton oder dergleichen sein.the Figs. 1 to 3 show a pre-stressable grout anchor 1 comprising a plurality of anchor tension members 2 according to the invention. A grout anchor 1 is also referred to as a prestressed anchor or a ground or rock anchor. The ground anchor 1 is a geotechnical component which transmits an applied tensile force into the subsoil 10. Here, a borehole 11 is made in the subsurface 10, the anchor tension members 2 are introduced into the bore hole 11 and then the anchor tension members 2 are anchored in the bore hole 11 by means of a grouting body 12. The grout 12 can be made of cement, concrete or the like.

Erfindungsgemäß, umfassen die Ankerzugglieder 2 ein nichtmetallisches Fasermaterial. Ein derartiges nichtmetallisches Fasermaterial können insbesondere Glasfaserkabeln sein. Glasfaserkabel bieten hierbei den Vorteil, dass diese eine hohe Zugfestigkeit aufweisen, chemisch beständig und einfach in der Herstellung sind. Alternativ können auch Kohlefasern, Kunststofffasern, beispielsweise aus Aramid oder Nylon, Naturfasern, keramische Fasern oder ähnliches Material für die Ankerzugglieder 2 verwendet werden. Weiters können die Ankerzugglieder 2 insbesondere ein Verbundmaterial umfassend nichtmetallisches Fasermaterial umfassen.According to the invention, the anchor tension members 2 comprise a non-metallic fiber material. Such a non-metallic fiber material can in particular be glass fiber cables. Fiber optic cables offer the advantage that they have a high tensile strength, are chemically resistant and are easy to manufacture. Alternatively, carbon fibers, plastic fibers, for example made of aramid or nylon, natural fibers, ceramic fibers or similar material can be used for the anchor tension members 2. Furthermore, the anchor tension members 2 can in particular comprise a composite material comprising non-metallic fiber material.

Erfindungsgemäß, sind die Ankerzugglieder 2 an einem Ende 6 mittels eines Klebstoffes 3 mit einer Koppelungsvorrichtung 4 verklebt, und ist ein Spannzugglied 5 zum Spannen des vorspannbaren Verpressankers 1 zumindest mittelbar mit der Koppelungsvorrichtung 4 verbunden. Die Koppelungsvorrichtung 4 verbindet die Ankerzugglieder 2 mit einem Spannzugglied 5, wobei das Spannzugglied 5 vorgehen ist mit einer Spannvorrichtung 9 gespannt zu werden. Das Spannzugglied 5 kann hierbei insbesondere aus Metall, insbesondere aus Stahl, ausgebildet sein. Weiters kann vorgesehen sein, dass das Spannzugglied 5 als Stahlzugglied ausgebildet ist. Dadurch können die Zugkräfte des Spannzuggliedes 5, welches mit herkömmlichen Mitteln gespannt werden kann, einfach und zuverlässig an die Ankerzugglieder 2 weitergeleitet werden, und durch die Ankerzugglieder 2 über den Verpresskörper 12 an den Untergrund 10. Durch die Klebeverbindung der Ankerzugglieder 2 mit der Koppelungsvorrichtung 4 kann eine zuverlässige Verbindung mit dem nichtmetallischen Faserstoff hergestellt werden, wobei dieser nicht beschädigt wird.According to the invention, the anchor tension members 2 are glued to a coupling device 4 at one end 6 by means of an adhesive 3, and a tension tension member 5 for tensioning the pre-tensionable grout anchor 1 is at least indirectly connected to the coupling device 4. The coupling device 4 connects the anchor tension members 2 to a tension tension member 5, the tension tension member 5 proceeding to be tensioned with a tensioning device 9. The tension member 5 can in particular be made of metal, in particular steel. Furthermore, it can be provided that the tension member 5 is designed as a steel tension member. As a result, the tensile forces of the tension member 5, which can be tensioned by conventional means, can be easily and reliably passed on to the anchor tension members 2, and through the anchor tension members 2 via the grouting body 12 to the subsurface 10. The adhesive connection of the anchor tension members 2 to the coupling device 4 enables a reliable connection to be established with the non-metallic fibrous material without damaging it .

Besonders bevorzugt kann vorgesehen sein, dass die Ankerzugglieder 2 im Wesentlichen an deren Mantelflächen verklebt sind. Dadurch wird die Klebestelle auf Schub und nicht auf Zug beansprucht, wodurch diese besonders hohe Kräfte aufnehmen kann.It can particularly preferably be provided that the anchor tension members 2 are essentially glued to their lateral surfaces. As a result, the adhesive point is subjected to thrust and not tensile stress, which means that it can absorb particularly high forces.

Insbesondere kann ein anderes Ende 13 der Ankerzugglieder 2, also ein, dem mit der Koppelungsvorrichtung 4 verklebten Ende 6 gegenüberliegendes, Ende 13 der Ankerzugglieder 2, mit dem Verpresskörper 12 in direktem Kontakt sein.In particular, another end 13 of the anchor tension members 2, that is to say an end 13 of the anchor tension members 2 opposite the end 6 bonded to the coupling device 4, can be in direct contact with the grout body 12.

Der Verpressanker 1 kann insbesondere als Kurzzeitanker oder als temporärer Verpressanker ausgebildet sein. Derartige Verpressanker 1 sind für eine Benützungsdauer von lediglich wenigen Jahren vorgesehen. Durch die Verwendung des nichtmetallischen Fasermaterials können die Ankerzugglieder 2 im Untergrund 10 verbleiben, wodurch der Abbauaufwand wesentlich reduziert werden kann.The grout anchor 1 can in particular be designed as a short-term anchor or as a temporary grout anchor. Such grout anchors 1 are provided for a period of use of only a few years. By using the non-metallic fiber material, the anchor tension members 2 can remain in the subsurface 10, which means that the dismantling effort can be significantly reduced.

Alternativ kann vorgesehen sein, dass der Verpressanker 1 als Daueranker ausgebildet ist. Derartige Verpressanker 1 sind für eine lange Benützungsdauer vorgesehen, beispielsweise mindestens hundert Jahre. Hierbei können die Ankerzugglieder 2 umfassend nichtmetallisches Fasermaterial korrosionsbeständiger als Ankerzugglieder 2 aus Metall sein.Alternatively, it can be provided that the grout anchor 1 is designed as a permanent anchor. Such grout anchors 1 are provided for a long period of use, for example at least a hundred years. Here, the anchor tension members 2 comprising non-metallic fiber material can be more corrosion-resistant than anchor tension members 2 made of metal.

Insbesondere kann der Verpresskörper 12 im Wesentlichen lediglich benachbart zu dem anderen Ende 13 der Ankerzugglieder 2 angeordnet sein.In particular, the pressing body 12 can essentially only be arranged adjacent to the other end 13 of the anchor tension members 2.

Alternativ kann vorgesehen sein, dass der Verpresskörper 12 im Wesentlichen das gesamte Bohrloch 11 ausfüllt.Alternatively, it can be provided that the grouting body 12 essentially fills the entire borehole 11.

In Fig. 1 ist eine bevorzugte Ausführungsform des vorspannbaren Verpressankers 1 gezeigt, wobei der Verpresskörper 12 nicht dargestellt ist. In Fig. 3 ist der vollständige Verpressanker 1 gezeigt, welcher im Bohrloch 11 angeordnet ist. Besonders bevorzugt kann vorgesehen sein, dass zwischen dem einen Ende 6 und dem anderen Ende 13 der Ankerzugglieder 2 eine Freilaufstrecke 14 angeordnet ist. In der Freilaufstrecke 14 können die Ankerzugglieder 2 in eine Hülle 15, insbesondere in eine Kunststoffhülle, in deren Längsrichtung frei beweglich angeordnet sein. Hierbei kann die Hülle 15 einzelne Ankerzugglieder 2 oder einen ganzen Strang an Ankerzugglieder 2 umhüllen. Durch die Freilaufstrecke 14 können die Ankerzugglieder 2 die Zugkräfte von der Koppelungsvorrichtung 4 ungehindert an den Verpresskörper 12 weiterleiten, wobei sich die Ankerzugglieder 2 unter der Vorspannung in der Freilaufstrecke 14 auch ungehindert dehnen können. Durch die Hülle 15 sind die Ankerzugglieder 2 in der Freilaufstrecke 14 mit dem Verpresskörper 12 nicht in Kontakt.In Fig. 1 a preferred embodiment of the pre-tensionable grout anchor 1 is shown, the grout body 12 not being shown. In Fig. 3 the complete grout anchor 1 is shown, which is arranged in the borehole 11. It can particularly preferably be provided that a free-running section 14 is arranged between the one end 6 and the other end 13 of the anchor tension members 2. In the freewheeling section 14, the anchor tension members 2 can be arranged in a sleeve 15, in particular in a plastic sleeve, so as to be freely movable in the longitudinal direction thereof. Here, the sheath 15 can enclose individual anchor tension members 2 or an entire strand of anchor tension members 2. Through the freewheeling section 14, the anchor tension members 2 can transfer the tensile forces from the coupling device 4 to the grouting body 12 without hindrance, with the anchor tension members 2 also being able to expand unhindered under the pretension in the freewheeling section 14. Due to the sheath 15, the anchor tension members 2 in the freewheeling section 14 are not in contact with the grouting body 12.

Insbesondere kann vorgesehen sein, dass die Ankerzugglieder 2 eine Länge zwischen 3 m und 20 m aufweisen.In particular, it can be provided that the anchor tension members 2 have a length between 3 m and 20 m.

Weiters kann vorgesehen sein, dass die Ankerzugglieder 2 im Wesentlichen gleich lang sind.Furthermore, it can be provided that the anchor tension members 2 are essentially of the same length.

Bevorzugt kann vorgesehen sein, dass eine Länge der Freilaufstrecke 14 größer ist als die Bereiche welche das eine Ende 6 und das andere Ende 13 der Ankerzugglieder 2 darstellen.It can preferably be provided that a length of the freewheeling section 14 is greater than the areas which represent one end 6 and the other end 13 of the anchor tension members 2.

Besonders bevorzugt kann vorgesehen sein, dass die Ankerzugglieder 2 parallel zueinander verlaufen.It can particularly preferably be provided that the anchor tension members 2 run parallel to one another.

Weiters kann vorgesehen sein, dass die Ankerzugglieder 2 mindestens vier mal so lange sind wie das Spannzugglied 5. Hierbei können die Ankerzugglieder 2 im Untergrund 10 belassen werden, während bei einem Kurzzeitanker lediglich das kürzere Spannzugglied 5 zu entfernen ist.Furthermore, it can be provided that the anchor tension members 2 are at least four times as long as the tension tension member 5. The anchor tension members 2 can be left in the subsurface 10, while in the case of a short-term anchor only the shorter tension tension member 5 has to be removed.

Besonders bevorzugt kann vorgesehen sein, dass der Klebstoff 3 ein Harz, bevorzugt ein Kunstharz, insbesondere ein Epoxidharz, ist. Harze haben hierbei den Vorteil der einfachen Implizierbarkeit mittels Gießen. Weiters ist Epoxidharz wasserbeständig.It can particularly preferably be provided that the adhesive 3 is a resin, preferably a synthetic resin, in particular an epoxy resin. Resins have the advantage that they can be easily implemented by means of casting. Furthermore, epoxy resin is water-resistant.

Weiters kann vorgesehen sein, dass das eine Ende 6 der Ankerzugglieder 2 in dem Klebstoff 3 eingebettet ist. Hierbei kann eine besonders großflächige Klebefläche erreicht werden. Weiters kann dadurch das Eindringen von korrosionsverursachenden Fluide in die Koppelungsvorrichtung 4 und die darunter liegenden Bereiche unterbunden werden.Furthermore, it can be provided that one end 6 of the anchor tension members 2 in the Adhesive 3 is embedded. A particularly large adhesive surface can be achieved here. Furthermore, the penetration of fluids causing corrosion into the coupling device 4 and the areas below it can be prevented.

Erfindungsgemäß, weist die Koppelungsvorrichtung 4 eine Hülse 7 auf, und ist eine Ende 6 der Ankerzugglieder 2 innerhalb der Hülse 7 angeordnet. Die Hülse 7, welche in Fig. 1 und Fig. 3 teilaufgeschnitten dargestellt ist, umfängt die Enden 6 der Ankerzugglieder 2 und ist mittels des Klebstoffes 3 mit diesen verklebt. Durch die Hülse 7 kann eine gute Einbindung der Enden 6 der Ankerzugglieder 2 erreicht werden, wobei durch die Hülse 7 ein definierter Bereich bereitgestellt werden kann, welcher vom Klebstoff 3 ausgegossen werden kann. Die Hülse 7 kann insbesondere umfassend Metall und/oder Kunststoff ausgebildet sein. Weiters kann die Hülse 7 insbesondere eine hohlzylindrische Form aufweisen.According to the invention, the coupling device 4 has a sleeve 7, and one end 6 of the anchor tension members 2 is arranged within the sleeve 7. The sleeve 7, which in Fig. 1 and Fig. 3 is shown partially cut away, surrounds the ends 6 of the anchor tension members 2 and is glued to them by means of the adhesive 3. A good integration of the ends 6 of the anchor tension members 2 can be achieved through the sleeve 7, wherein the sleeve 7 can provide a defined area which can be filled with the adhesive 3. The sleeve 7 can in particular be designed to include metal and / or plastic. Furthermore, the sleeve 7 can in particular have a hollow cylindrical shape.

Weiters kann bevorzugt vorgesehen sein, dass die Koppelungsvorrichtung 4 eine Länge von weniger als 2 m aufweist. Dadurch kann diese bei einem Kurzzeitanker leicht wieder aus dem Untergrund 10 entfernt werden.Furthermore, it can preferably be provided that the coupling device 4 has a length of less than 2 m. As a result, it can easily be removed from the substrate 10 again in the case of a short-term anchor.

Die Länge der Hülse 7 kann im Wesentlichen der Länge der Koppelungsvorrichtung 4 entsprechen.The length of the sleeve 7 can essentially correspond to the length of the coupling device 4.

Insbesondere kann vorgesehen sein, dass die Ankerzugglieder 2 sich im Wesentlichen über die gesamte Länge der Hülse 7 in der Hülse 7 erstrecken. Mit anderen Worten können die Ankerzugglieder 2 über die gesamte Länge der Hülse 7 in der Hülse angeordnet sein. Dadurch kann eine besonders große Klebefläche bereitgestellt werden.In particular, it can be provided that the anchor tension members 2 extend essentially over the entire length of the sleeve 7 in the sleeve 7. In other words, the anchor tension members 2 can be arranged in the sleeve over the entire length of the sleeve 7. As a result, a particularly large adhesive surface can be provided.

Insbesondere kann vorgesehen sein, dass der Verpressanker 1 lediglich ein Spannzugglied 5 aufweist. Das eine Spannzugglied 5 kann hierbei als Strang, Stange oder Seil ausgebildet sein.In particular, it can be provided that the grout anchor 1 has only one tension member 5. One tension member 5 can be designed as a strand, rod or rope.

Alternativ kann vorgesehen sein, dass der Verpressanker 1 mehrere Spannzugglieder aufweist. Hierbei kann insbesondere vorgesehen sein, dass die Anzahl der Ankerzugglieder 2 größer ist als die Anzahl der Spannzugglieder 5.Alternatively, it can be provided that the grout anchor 1 has several tension members. In particular, it can be provided here that the number of anchor tension members 2 is greater than the number of tension tension members 5.

Erfindungsgemäß, ist ein erster Bereich 8 des Spannzuggliedes 5 innerhalb der Hülse 7 angeordnet. Hierbei können der erste Bereich 8 des Spannzuggliedes 5 und die einen Enden 6 der Ankerzugglieder 2 in der Hülse 7 überlappend angeordnet sein, wodurch eine besonders gute Kraftüberleitung durch den Klebstoff 3 möglich ist.According to the invention, a first region 8 of the tension member 5 is arranged inside the sleeve 7. Here, the first area 8 of the tension tension member 5 and the one ends 6 of the anchor tension members 2 can be arranged in an overlapping manner in the sleeve 7, whereby a particularly good transmission of force through the adhesive 3 is possible.

Weiters kann ein zweiter Bereich 16 des Spannzuggliedes 5 des Spannzuggliedes vorgesehen sein, welcher mit einer Spannvorrichtung 9 verspannbar ist. Die Spannvorrichtung 9 ist hierbei zum Aufbringen und Halten der Spannkraft vorgesehen.Furthermore, a second region 16 of the tensioning tension member 5 of the tensioning tension member can be provided which can be tensioned with a tensioning device 9. The clamping device 9 is provided for applying and holding the clamping force.

Besonders bevorzugt kann vorgesehen sein, dass das Spannzugglied 5 ein Gewinde zum Eingriff einer Spannvorrichtung 9 aufweist. Die Spannvorrichtung 9 kann hierbei insbesondere ein Innengewinde aufweisen, wobei durch ein Drehen der Spannvorrichtung 9 die Spannkraft eingestellt werden kann und der vorspannbare Verpressanker 1 leicht nachgespannt werden kann. Insbesondere kann vorgesehen sein, dass das Spannzugglied 5 als Gewindestange ausgebildet ist.It can particularly preferably be provided that the tensioning tension member 5 has a thread for engaging a tensioning device 9. The tensioning device 9 can in particular have an internal thread, whereby the tensioning force can be adjusted by turning the tensioning device 9 and the pre-tensionable grout anchor 1 can be easily re-tensioned. In particular, it can be provided that the tensioning tension member 5 is designed as a threaded rod.

Alternativ kann vorgesehen sein, dass die Spannvorrichtung 9 als Lochplatte mit Keilen vorgesehen ist. Hierbei kann das Spannzugglied 5 mittels eines externen Gerätes gespannt und anschließend in der Lochplatte mit den Keilen in der vorgespannten Situation fixiert werden.Alternatively, it can be provided that the clamping device 9 is provided as a perforated plate with wedges. Here, the tension member 5 can be tensioned by means of an external device and then fixed in the perforated plate with the wedges in the pre-tensioned situation.

Besonders bevorzugt kann vorgesehen sein, dass die Ankerzugglieder 2 im Wesentlichen gleichmäßig verteilt um den ersten Bereich 8 des Spannzuggliedes 5 angeordnet sind. Dadurch kann eine besonders gleichmäßige Kraftübertragung der vielen Ankerzugglieder 2 an das Spannzugglied erfolgen. Weiters kann dadurch die Koppelungsvorrichtung 4 besonders einfach und platzsparrend ausgebildet sein. Eine derartige Anordnung ist in Fig. 2 dargestellt, wobei die einzelnen Stränge der Ankerzugglieder 2 in einer kreisförmigen Anordnung um das zentrale Spannzugglied 5 angeordnet sind. Das Spannzugglied kann insbesondere koaxial zu der Hülse 4 angeordnet sein.It can particularly preferably be provided that the anchor tension members 2 are arranged in a substantially uniformly distributed manner around the first region 8 of the tension tension member 5. As a result, a particularly uniform transmission of force from the many anchor tension members 2 to the tension tension member can take place. Furthermore, the coupling device 4 can thereby be designed in a particularly simple and space-saving manner. Such an arrangement is in Fig. 2 shown, wherein the individual strands of the anchor tension members 2 are arranged in a circular arrangement around the central tension member 5. The tension member can in particular be arranged coaxially to the sleeve 4.

Weiters kann vorgesehen sein, dass der vorspannbare Verpressanker 1 mindesten drei Ankerzugglieder 2, insbesondere fünf bis zwanzig Ankerzugglieder 2, aufweist. Hierbei kann die Krafteinleitung besonders gleichmäßig über die einzelnen Ankerzugglieder 2 an ein zentral angeordnetes Spannzugglied 5 weitergeleitet werden.Furthermore, it can be provided that the pre-tensionable grout anchor 1 has at least three anchor tension members 2, in particular five to twenty anchor tension members 2. Here, the introduction of force can be passed on particularly evenly via the individual anchor tension members 2 to a centrally arranged tension tension member 5.

Insbesondere kann vorgesehen sein, dass ein Durchmesser des Spannzuggliedes 5 größer als ein Durchmesser der Ankerzugglieder 2 ist. Hierbei können die Ankerzugglieder 2 besser umlaufend um das Spannzugglied 5 angeordnet werden, wodurch eine gleichmäßige Kraftübertragung verbessert wird.In particular, it can be provided that a diameter of the tension tension member 5 is greater than a diameter of the anchor tension members 2. In this case, the anchor tension members 2 can be arranged better circumferentially around the tension tension member 5, as a result of which a uniform transmission of force is improved.

Erfindungsgemäß, ist das Spannzugglied 5 unmittelbar mit dem Klebstoff 3 mit der Koppelungsvorrichtung 4 verklebt. Hierbei kann auf die Verwendung zusätzlicher Verbindungsmitteln verzichtet werden, wodurch die Ankopplung des Spannzugglied 5 mit der Koppelungsvorrichtung 4 besonders einfach ausgebildet sein kann. Hierbei kann vorgesehen sein, dass das Spannzugglied 5 im Wesentlichen an seiner Mantelfläche verklebt ist. Insbesondere kann vorgesehen sein, dass das Spannzugglied 5 und die Ankerzugglieder 2 in einem als Harz ausgebildeten Klebstoff gemeinsam eingebettet sind. Eine derartige Verbindung ist in Fig. 2 gezeigt, wobei das Spannzugglied 5 und die ringförmig angeordneten Ankerzugglieder 2 in dem Harz eingebettet sind.According to the invention, the tension member 5 is glued directly to the coupling device 4 by means of the adhesive 3. In this case, the use of additional connecting means can be dispensed with, as a result of which the coupling of the tensioning tension member 5 to the coupling device 4 can be made particularly simple. It can be provided here that the tensioning tension member 5 is essentially glued to its outer surface. In particular, it can be provided that the tension tension member 5 and the anchor tension members 2 are jointly embedded in an adhesive formed as a resin. Such a connection is in Fig. 2 shown, wherein the tension member 5 and the annularly arranged anchor tension members 2 are embedded in the resin.

Alternativ kann vorgesehen sein, dass die Koppelungsvorrichtung 4 eine Verbindungseinrichtung aufweist, und dass das Spannzugglied 5 mit der Verbindungseinrichtung verbunden ist. Die Verbindungseinrichtung kann insbesondere zum lösbaren Verbinden des Spannzugglied 5 ausgebildet sein. Beispielsweise kann die Verbindungseinrichtung als Gewindemuffe ausgebildet sein, in welche das Spannzugglied 5 eingeschraubt ist. Weiters kann die Verbindungseinrichtung an der Hülse 7 befestigt sein. Durch die Verbindungseinrichtung ergibt sich der Vorteil, dass das Spannzugglied 5 leicht von der Koppelungsvorrichtung 4 gelöst werden kann, wodurch der Abbau des Verpressankers 1 besonders einfach gestaltet werden kann.Alternatively, it can be provided that the coupling device 4 has a connecting device, and that the tensioning tension member 5 is connected to the connecting device. The connecting device can in particular be designed for releasably connecting the tensioning tension member 5. For example, the connecting device can be designed as a threaded sleeve into which the tensioning tension member 5 is screwed. Furthermore, the connecting device can be attached to the sleeve 7. The connecting device has the advantage that the tensioning tension member 5 can easily be detached from the coupling device 4, as a result of which the dismantling of the grout anchor 1 can be made particularly simple.

Weiters kann vorgesehen sein, dass ein Injektionsrohr durch die Hülse 7 durchführt. Das Injektionsrohr dient dazu, das Material für den Verpresskörper 12 an den Boden des Bohrloches 11 zu leiten. Zur Platzersparnis kann dass Injektionsrohr zwischen das Spannzugglied 5 und die Ankerglieder 2 durch die Hülse 7 geführt, und dort eingebettet werden. Dadurch kann eine besonders kompakte Bauform erreicht werden.Furthermore, it can be provided that an injection tube passes through the sleeve 7. The injection tube is used to bring the material for the grout body 12 to the ground of the borehole 11 to direct. To save space, the injection tube can be passed between the tension member 5 and the anchor members 2 through the sleeve 7 and embedded there. This enables a particularly compact design to be achieved.

Claims (9)

  1. Pre-loadable grouted anchor (1), comprising a plurality of anchor tension members (2), wherein the anchor tension members (2) comprise a non-metallic fiber material, wherein the anchor tension members (2) are bonded at one end (6) to a coupling device (4) by means of an adhesive (3), wherein a tensioning tension member (5) for tensioning said pre-loadable grouted anchor (1) is connected to the coupling device (4), wherein the coupling device (4) comprises a sleeve (7), and that the one end (6) of the anchor tension member (2) is arranged inside the sleeve (7), characterized in that a first region (8) of the tensioning tension member (5) is arranged inside the sleeve (7), and in that the tensioning tension member (5) is directly bonded with the adhesive (3) to the coupling device (4).
  2. Pre-loadable grouted anchor (1) according to claim 1, characterized in that the adhesive (3) is a resin, in particular an epoxy resin.
  3. Pre-loadable grouted anchor (1) according to claim 1 or 2, characterized in that one end (6) of the anchor tension members (2) is embedded in the adhesive (3).
  4. Pre-loadable grouted anchor (1) according to claim 1 to 3, characterized in that the anchor tension members (2) are arranged substantially evenly distributed around the first region (8) of the tensioning tension member (5).
  5. Pre-loadable grouted anchor (1) according to one of claims 1 to 4, characterized in that the tensioning tension member (5) has a thread for engaging a tensioning device (9).
  6. Pre-loadable grouted anchor (1) according to one of claims 1 to 5, characterized in that the pre-loadable grouted anchor (1) has at least three anchor tension members (2), in particular five to twenty anchor tension members (2).
  7. Pre-loadable grouted anchor (1) according to one of claims 1 to 6, characterized in that a diameter of the tensioning tension member (5) is larger than a diameter of the anchor tension members (2).
  8. Pre-loadable grouted anchor (1) according to one of claims 1 to 7, characterized in that the anchor tension members (2) are at least four times as long as the tensioning tension member (5).
  9. Pre-loadable grouted anchor (1) according to one of claims 1 to 8, characterized in that an injection pipe passes through the sleeve (7).
EP14450046.9A 2013-10-18 2014-10-15 Pre-loadable ground anchor Active EP3690187B1 (en)

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ATA806/2013A AT514992B1 (en) 2013-10-18 2013-10-18 Prestressing anchor

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DE202017102490U1 (en) 2017-04-27 2017-05-17 FiReP International AG Anchor arrangement in the ground as well as ground anchors
CN114197463A (en) * 2021-11-26 2022-03-18 北京市市政四建设工程有限责任公司 GFRP (glass fiber reinforced plastic) rib and steel strand composite anchor rod structure and using method thereof
CN114622554A (en) * 2022-01-18 2022-06-14 吉林大学 Pressure dispersion type anchor rope bearing structure

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JP2876056B2 (en) * 1991-08-02 1999-03-31 株式会社銭高組 New material ground permanent anchor
JP2590930Y2 (en) * 1993-12-28 1999-02-24 東京製綱株式会社 Anchor body for ground anchor
JPH11193526A (en) * 1997-12-26 1999-07-21 Tokyo Seiko Co Ltd Tension and anchorage method for fiber composite linear material
CN203035213U (en) * 2012-11-16 2013-07-03 山东科技大学 Expansion type anchor rod

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AT514992A1 (en) 2015-05-15
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EP3690187A1 (en) 2020-08-05

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