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EP2785975B1 - Pièce d'ancrage, en particulier pièce d'ancrage pour la pierre - Google Patents

Pièce d'ancrage, en particulier pièce d'ancrage pour la pierre Download PDF

Info

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
Application number
EP12772961.4A
Other languages
German (de)
English (en)
Other versions
EP2785975A2 (fr
Inventor
Frank Schmidt
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hilti AG
Original Assignee
Hilti AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hilti AG filed Critical Hilti AG
Publication of EP2785975A2 publication Critical patent/EP2785975A2/fr
Application granted granted Critical
Publication of EP2785975B1 publication Critical patent/EP2785975B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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.

Landscapes

  • 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)

Claims (6)

  1. Pièce d'ancrage comportant un filetage auto-taraudeur (21) et une tige d'ancrage (10), dans laquelle au moins un canal d'alimentation s'étendant axialement (15) pour un composé durcissable est agencé dans la tige d'ancrage (10),
    dans laquelle sur une première extrémité (31) de la tige d'ancrage (10) est fixé un élément de tête (20) sur lequel est agencé le filetage auto-taraudeur (21),
    caractérisée en ce que
    l'élément de tête (20) est constitué d'un matériau plein et
    le canal d'alimentation (15) est fermé par l'élément de tête (20).
  2. Pièce d'ancrage selon la revendication 1,
    caractérisée en ce que
    le diamètre à fond de filet du filetage (21) agencé sur l'élément de tête (20) est plus grand que le diamètre de la tige d'ancrage (10).
  3. Pièce d'ancrage selon l'une des revendications précédentes,
    caractérisée en ce que
    le canal d'alimentation (15) et le filetage (21) sont espacés axialement.
  4. Pièce d'ancrage selon l'une des revendications précédentes,
    caractérisée en ce que
    dans la tige d'ancrage (10) est prévu au moins un alésage de sortie (16) qui mène du canal d'alimentation (15) au côté extérieur de la pièce d'ancrage (10).
  5. Pièce d'ancrage selon l'une des revendications précédentes,
    caractérisée en ce que
    la tige d'ancrage (10) et l'élément de tête (20) sont reliés par l'intermédiaire d'un assemblage soudé, en particulier par un assemblage soudé par friction (26).
  6. Pièce d'ancrage selon l'une des revendications précédentes,
    caractérisée en ce que
    sur une zone d'extrémité (32) opposée à la première extrémité (31) de la pièce d'ancrage (10) est agencé un écrou d'ancrage (40).
EP12772961.4A 2011-11-28 2012-10-17 Pièce d'ancrage, en particulier pièce d'ancrage pour la pierre Not-in-force EP2785975B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011087178A DE102011087178A1 (de) 2011-11-28 2011-11-28 Anker, insbesondere Gesteinsanker
PCT/EP2012/070546 WO2013079254A2 (fr) 2011-11-28 2012-10-17 Pièce d'ancrage, en particulier pièce d'ancrage pour la pierre

Publications (2)

Publication Number Publication Date
EP2785975A2 EP2785975A2 (fr) 2014-10-08
EP2785975B1 true EP2785975B1 (fr) 2017-07-12

Family

ID=47022697

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12772961.4A Not-in-force EP2785975B1 (fr) 2011-11-28 2012-10-17 Pièce d'ancrage, en particulier pièce d'ancrage pour la pierre

Country Status (5)

Country Link
US (1) US9664042B2 (fr)
EP (1) EP2785975B1 (fr)
KR (1) KR20140094027A (fr)
DE (1) DE102011087178A1 (fr)
WO (1) WO2013079254A2 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
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
WO2025166406A1 (fr) * 2024-02-05 2025-08-14 Jms18 Pty Ltd Élément de fixation à double extrémité

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1892426A1 (fr) * 2005-06-13 2008-02-27 Aoyama Seisakusho Co., Ltd. Vis
WO2009079684A1 (fr) * 2007-12-21 2009-07-02 Alminco Pty Ltd Soutènement par boulons d'ancrage autoforeurs

Family Cites Families (14)

* Cited by examiner, † Cited by third party
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 (de) 1970-12-24 1975-07-03 Kali Und Salz Ag, 3500 Kassel Zugankerschraube zum Aufhägen von Lasten in Salzlagerstätten
US4553279A (en) * 1983-10-17 1985-11-19 Gassew Garry L Multi-purpose paint stick
DE3840158A1 (de) * 1988-11-29 1990-05-31 Gd Anker Gmbh & Co Kg Verfahren zum setzen eines ankers und vorrichtung zur durchfuehrung des verfahrens
US5433558A (en) * 1990-10-29 1995-07-18 Bhp Engineering Pty Ltd Self-tapping, and self-tapping and self-drilling, rock bolts
DE19608859A1 (de) * 1996-03-07 1997-09-11 Hilti Ag Ankerstange für Verbundanker
DE29707502U1 (de) 1997-04-25 1997-06-19 Gebr. Van Leeuwen Harmelen B.V., Harmelen Schraub-Injektionsanker
US6457909B1 (en) * 2000-12-22 2002-10-01 Shulin Xu Multi-purpose anchor bolt assembly
CA2624690A1 (fr) 2005-11-09 2007-05-18 Steven Weaver Boulon de roche autoforeur
DE102006000412A1 (de) * 2006-08-23 2008-02-28 Hilti Ag Befestigungselement für harte Untergründe
DE102007000829A1 (de) 2007-10-08 2009-04-09 Hilti Aktiengesellschaft Befestigungselement
FR2940807B1 (fr) * 2009-01-06 2011-02-04 Ancrest Sa Dispositif d'ancrage dans un sol
CA2749598C (fr) * 2009-09-01 2015-04-14 Fci Holdings Delaware, Inc. Boulon elastique et ensemble
DE102010002214A1 (de) 2010-02-23 2011-08-25 Hilti Aktiengesellschaft Bewehrungs- und/oder Ankerschraube

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1892426A1 (fr) * 2005-06-13 2008-02-27 Aoyama Seisakusho Co., Ltd. Vis
WO2009079684A1 (fr) * 2007-12-21 2009-07-02 Alminco Pty Ltd Soutènement par boulons d'ancrage autoforeurs

Also Published As

Publication number Publication date
US20140334885A1 (en) 2014-11-13
US9664042B2 (en) 2017-05-30
WO2013079254A3 (fr) 2013-12-05
EP2785975A2 (fr) 2014-10-08
WO2013079254A2 (fr) 2013-06-06
DE102011087178A1 (de) 2013-05-29
KR20140094027A (ko) 2014-07-29

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