EP0015895A1 - Tension bolt for anchoring construction elements in a foundation body - Google Patents

Tension bolt for anchoring construction elements in a foundation body Download PDF

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Publication number
EP0015895A1
EP0015895A1 EP19800890029 EP80890029A EP0015895A1 EP 0015895 A1 EP0015895 A1 EP 0015895A1 EP 19800890029 EP19800890029 EP 19800890029 EP 80890029 A EP80890029 A EP 80890029A EP 0015895 A1 EP0015895 A1 EP 0015895A1
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EP
European Patent Office
Prior art keywords
sleeve
anchor rod
thread
pitch
threads
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.)
Granted
Application number
EP19800890029
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German (de)
French (fr)
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EP0015895B1 (en
Inventor
Dominik Voigt
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.)
EDARCO European Development and Research Co Ltd
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EDARCO European Development and Research Co Ltd
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Publication of EP0015895A1 publication Critical patent/EP0015895A1/en
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Publication of EP0015895B1 publication Critical patent/EP0015895B1/en
Expired legal-status Critical Current

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    • 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
    • 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
    • E21D21/0033—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection characterised by constructional features of the bolts having a jacket or outer tube

Definitions

  • the invention relates to a tie rod for anchoring components in a base body, e.g. Rock, brick, concrete body, etc. using a sleeve provided with inner and outer elevations and an anchor rod that can be inserted into them.
  • a base body e.g. Rock, brick, concrete body, etc.
  • a sleeve provided with inner and outer elevations and an anchor rod that can be inserted into them.
  • Rock and earth anchors are used in tunneling, earthworks and mining and are used to hold earthworks, formwork, etc.
  • the internal thread of the sleeve can expediently have a pitch that is greater than the other threads, at least at the closed end.

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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)
  • Dowels (AREA)
  • Joining Of Building Structures In Genera (AREA)

Abstract

1. A tie rod for anchoring parts of a structure in a base, such as rock, brick, concrete element and others, wherein an anchor rod (7) is disposed in a sleeve (1), which is fixed on the hillside in an anchoring composition and which on its inside surface facing the anchor rod has female screw threads, the anchor rod is provided with male screw threads on its outside surface facing the sleeve, the sleeve is closed at its hillside end, the female screw threads (2) of the sleeve (1) have at least at the closed end a larger pitch than the screw threads of the anchor rod and the thread ribs (13) of the anchor rod (7) extend into the thread grooves (12) of the sleeve (1) with clearances, characterized in that the pitch of the female screw threads (2) of the sleeve (1) is largest at its closed end and gradually decreases towards its open end and from the one-half to two-thirds points of the length of the sleeve (1) equals the pitch of the screw threads (8) of the anchor rod (7).

Description

Die Erfindung betrifft einen Zuganker zur Verankerung von Bauteilen in einem Grundkörper, z.B. Fels, Ziegel, Betonkörper u.a. unter Verwendung einer mit inneren und äußeren Erhebungen versehenen Hülse sowie eines in diese einsetzbaren Ankerstabes.The invention relates to a tie rod for anchoring components in a base body, e.g. Rock, brick, concrete body, etc. using a sleeve provided with inner and outer elevations and an anchor rod that can be inserted into them.

Fels- und Erdanker werden im Tunnel-, Erd- und Bergbau verwendet und dienen zum Festhalten von Erdbauten, Schalungen u.a.Rock and earth anchors are used in tunneling, earthworks and mining and are used to hold earthworks, formwork, etc.

Aufgabe der vorliegenden Erfindung ist die Schaffung von Maßnahmen, durch welche mit einfachen Mitteln und mit geringem Arbeitsaufwand ein Ankerstab in einem Grundkörper so befestigt werden kann, daß er für einen Zug von einer Vielzahl von Tonnen z.B. bis zu 20 Tonnen zulässig ist.The object of the present invention is to provide measures by which an anchor rod can be fastened in a base body with simple means and with little work so that it can be used for a train of a plurality of tons e.g. up to 20 tons is permitted.

Diese Aufgabe wird dadurch wirksam gelöst, daß beim Zuganker der eingangs erwähnten Art erfindungsgemäß der Ankerstab mit einem Außengewinde in ein Innengewinde der Hülse eingesetzt bzw. eingeschraubt ist.This object is effectively achieved in that, according to the invention, the tie rod with an external thread is inserted or screwed into an internal thread of the sleeve in the tie rod of the type mentioned at the outset.

Zweckmäßig kann das Innengewinde der Hülse zumindest am geschlossenen Ende eine, gegenüber den anderen Gewindegängen größere Steigung aufweisen.The internal thread of the sleeve can expediently have a pitch that is greater than the other threads, at least at the closed end.

Nach einem weiteren Merkmal der Erfindung ist die Hülse einschließlich des Außen- und des Innengewindes als unbearbeitetes, metallisches Gußstück ausgebildet, welches vorzugsweise aus Aluminium oder Grauguß besteht. Vorzugsweise ist die Hülse mit einem als keilförmige Schneide ausgebildeten geschlossenen Ende versehen.According to a further feature of the invention, the sleeve including the external and internal thread is designed as an unprocessed, metallic casting, which preferably consists of aluminum or gray cast iron. The sleeve is preferably provided with a closed end designed as a wedge-shaped cutting edge.

Weitere Einzelheiten der Erfindung werden an Hand der Zeichnung näher erläutert, in welcher ein Ausführungsbeispiel des erfindungsgemäßen Zugankers dargestellt ist. Es zeigen

  • Figur 1 einen Längsschnitt der Hülse,
  • Figur 2 eine Seitenansicht des Ankerstabes,
  • Figur 3 einen Querschnitt desselben und
  • Figur 4 einen Querschnitt einer abgeänderten Form der Hülse mit eingesetztem Ankerstab.
Further details of the invention are explained in more detail with reference to the drawing, in which an embodiment of the tie rod according to the invention is shown. Show it
  • FIG. 1 shows a longitudinal section of the sleeve,
  • FIG. 2 shows a side view of the anchor rod,
  • 3 shows a cross section of the same and
  • Figure 4 shows a cross section of a modified form of the sleeve with an inserted anchor rod.

Der Zuganker besitzt eine Hülse 1, welche als Gußstück aus Metall, vorzugsweise Aluminium oder Grauguß hergestellt, einen zylindrischen Grundkörper 4 besitzt, auf dessen Außenseite ein Außengewinde 3 und auf dessen Innenseite ein Innengewinde 2 vorgesehen ist, so daß der Außendurchmesser des Innengewindes "d" kleiner als der Innendurchmesser des Außengewindes ist, und die Differenz zwischen den beiden Durchmessern der eigentlichen Wandstärke --a-des Grundkörpers 4 der Hülse 1 entspricht. Das Außengewinde 3 ist sägezahnartig ausgebildet, so daß die im wesentlichen lotrecht zur Achse der Hülse gelegene Fläche 5 im eingebauten Zustand der Hülse 1 nach außen und die schräge Fläche 10 nach innen gerichtet ist, wodurch ein hoher Widerstand gegen Zugwirkung in der Richtung des Pfeiles A gegeben ist. Die Gewindegänge des Außengewindes 3 schließen eng aneinander an, während das Innengewinde 2 mit größerer Steigung versehen ist, so daß zwischen den einzelnen Gewindegängen ein Abstand --b-- vorhanden ist. Zur Verhinderung von Kerbspannungen können die inneren Flankenausläufe des Außengewindes abgerundet sein. Die Hülse 1 ist an ihrem einen Ende offen und an ihrem anderen Ende in eine keilförmige Schneide 6 auslaufend verschlossen.The tie rod has a sleeve 1, which as a casting made of metal, preferably aluminum or gray cast iron, has a cylindrical base body 4, on the outside of which an external thread 3 and on the inside of which an internal thread 2 is provided, so that the external diameter of the internal thread "d" is smaller than the inside diameter of the external thread, and the difference between the two diameters corresponds to the actual wall thickness --a - of the base body 4 of the sleeve 1. The external thread 3 is sawtooth-shaped, so that the surface 5, which is essentially perpendicular to the axis of the sleeve, is directed outwards in the installed state of the sleeve 1 and the inclined surface 10 is directed inwards, as a result of which there is a high resistance to tensile action in the direction of the arrow A. given is. The threads of the external thread 3 close together, while the internal thread 2 with size rer pitch is provided so that there is a distance --b-- between the individual threads. To prevent notch stresses, the inner flank outlets of the external thread can be rounded. The sleeve 1 is open at one end and closed at its other end in a wedge-shaped cutting edge 6.

Der Ankerstab 7, welcher in die Hülse 1 eingeschraubt wird, besitzt ein dem Innengewinde 2 entsprechendes Außengewinde 8, welches als sogenanntes Mammutgewinde ausgebildet ist, dessen Gewindegänge sich, wie der Fig. 2 zu entnehmen ist, nur über einen Teil der Oberfläche erstrecken und an diametral gegenüberliegenden Stellen in die Mantelfläche auslaufen, so daß zwei axial verlaufende, diametral gegenüberliegende glatte Mantelflächen 9 entstehen. Um zu verhindern, daß bei Toleranzen des Innengewindes der Hülse 1 und des Außengewindes des Ankerstabes 7 bei Zugbelastung desselben nur die nahe dem äußeren Ende der Hülse 1 gelegenen Gewindegänge die Gesamtlast aufnehmen, wodurch das Hülsenende abgerissen werden könnte, ist in vorteilhafter Weise die Steigung des Innengewindes 2 der Hülse 1 am geschlossenen Ende derselben um eine geringe Toleranz unterschiedlich, vorzugsweise größer als für den Ankerstab 7 gedacht wäre, wodurch, wie der Fig. 4 zu entnehmen ist, auf jeden Fall die innersten Gewindegänge 10, 11 zum Tragen kommen und die Last auf die gesamte Hülsenlänge übertragen wird. Zu diesem Zwecke muß die Höhe --H-- der Gewindenuten 12 der Hülse 1 größer als die Höhe "h" der Gewindegänge 13 des Ankerstabes 7 sein, so daß die Gewindegänge 13 des Ankerstabes 7 in den Gewindenuten 12 der Hülse 1 ein Spiel haben. Diese Toleranz kann wenige Zehntel Millimeter, z.B. o,2 mm betragen. Vorzugsweise erstreckt sich diese Toleranz auf mindestens die halbe, zweckmäßig zwei Drittel der Hülsenlänge und ist fortlaufend immer kleiner, so daß die Steigung am geschlossenen Hülsenende am größten ist und sich allmählich bis zur normalen Steigung in der halben bzw. zweidrittel Länge verringert, so daß am Ende dieser Länge eine normale Steigung vorhanden ist.The anchor rod 7, which is screwed into the sleeve 1, has an external thread 8 corresponding to the internal thread 2, which is designed as a so-called mammoth thread, the threads of which, as can be seen in FIG. 2, only extend over part of the surface and on run diametrically opposite points in the outer surface, so that two axially extending, diametrically opposite smooth outer surfaces 9 are formed. In order to prevent tolerances of the internal thread of the sleeve 1 and the external thread of the anchor rod 7 when the tensile load is applied, only the threads located near the outer end of the sleeve 1 absorb the total load, which could tear off the sleeve end, is advantageously the slope of the Internal thread 2 of the sleeve 1 at the closed end of the same by a small tolerance, preferably larger than would be intended for the anchor rod 7, whereby, as can be seen in FIG. 4, the innermost threads 10, 11 definitely come into play and the Load is transferred to the entire sleeve length. For this purpose, the height --H-- of the thread grooves 12 of the sleeve 1 must be greater than the height "h" of the threads 13 of the anchor rod 7, so that the threads 13 of the anchor rod 7 have a play in the thread grooves 12 of the sleeve 1 . This tolerance can be a few tenths of a millimeter, for example 0.2 mm. This tolerance preferably extends to at least half, expediently two thirds of the sleeve length and is continuously smaller and smaller, so that the slope at the closed sleeve end is greatest and gradually decreases to the normal slope in half or two thirds of the length, so that on A normal slope at the end of this length is available.

Zur Befestigung des Ankerstabes 7 in einem Fels kann vorerst eine Kleberpatrone in eine Felsbohrung eingebracht werden, worauf die Hülse 1 in die Bohrung eingesetzt und durch einen Hammerschlag so weit eingetrieben wird, daß sie mit der Schneide 10 die Kleberpatrone zerstört, wodurch der Kleber das Hülsenende umschließt. Durch weiteres Eintreiben oder Einschrauben der Hülse 1 in die Felsbohrung mittels eines von einer Bohrmaschine angetriebenen Setzgerätes wird der Kleber fortschreitend zwischen die Gänge des Außengewindes 3 gepreßt, bzw. durch diese nach vorne getrieben, so daß bei gänzlich im Fels versenkter Hülse 1 der Kleber alle Gewindegänge durchdrungen hat und nach dem Erhärten eine feste Verankerung der Hülse im Fels bewirkt. In die so befestigte Hülse 1 wird der Ankerstab 7 eingeschraubt.To fasten the anchor rod 7 in a rock, an adhesive cartridge can first be inserted into a rock hole, whereupon the sleeve 1 is inserted into the hole and driven in by a hammer blow so that it destroys the adhesive cartridge with the cutting edge 10, as a result of which the adhesive ends the sleeve encloses. By further driving or screwing the sleeve 1 into the rock hole by means of a setting tool driven by a drilling machine, the adhesive is progressively pressed between the gears of the external thread 3, or driven through it, so that when the sleeve 1 is completely sunk in the rock, the adhesive is all Has penetrated threads and after hardening has caused the sleeve to be firmly anchored in the rock. The anchor rod 7 is screwed into the sleeve 1 fastened in this way.

Selbstverständlich können im Rahmen der Erfindung verschiedene konstruktive Abänderungen vorgenommen werden. So besteht die Möglichkeit, anstelle des sägezahnartigen Außengewindes 3 ein anderes Gewinde oder einfache Erhebungen vorzusehen, wodurch eine Verankerung in der Klebermasse erzielt wird. Auch kann anstelle der Vergrößerung der endseitigen Gewindesteigung eine Verringerung derselben gegenüber der des Ankerstabes 7 gewählt werden.Of course, various design changes can be made within the scope of the invention. It is thus possible to provide a different thread or simple elevations instead of the sawtooth-like external thread 3, as a result of which anchoring in the adhesive mass is achieved. Instead of increasing the thread pitch at the end, a reduction thereof can be chosen compared to that of the anchor rod 7.

Die erfindungsgemäße Hülse 1 kann infolge ihrer bevorzugten Verankerungseigenschaften so bemessen sein, daß mit verhältnismäßig geringer Kenge des an sich teueren Klebemittels das Auslangen gefunden werden kann. Als Kleber werden vor allem Kunststoffkleber mit hoher Festigkeit verwendet. Es besteht aber auch die Möglichkeit, andere Massen zu verwenden, welche die erforderliche Verankerungsfestigkeit ergeben.Due to its preferred anchoring properties, the sleeve 1 according to the invention can be dimensioned such that it can be found with a relatively small amount of the adhesive, which is expensive per se. Plastic adhesives with high strength are primarily used as adhesives. But there is also the possibility of using other masses, which give the required anchoring strength.

Claims (10)

1.Zuganker zur Verankerung von Bauteilen in einem Grundkörper, z.B. Fels, Ziegel, Betonkörper u.a. unter Verwendung einer mit inneren und äußeren Erhebungen versehenen Hülse sowie eines in diese einsetzbaren Ankerstabes, dadurch gekennzeichnet, daß der Ankerstab (7) mit einem Außengewinde (8) in ein Innengewindeo(2) der Hülse (1) eingesetzt bzw. eingeschraubt ist.1.Tension anchor for anchoring components in a base body, e.g. Rock, brick, concrete body, etc. using a sleeve provided with internal and external elevations and an anchor rod which can be inserted therein, characterized in that the anchor rod (7) is inserted or screwed into an internal thread (2) of the sleeve (1) with an external thread (8). 2.Zuganker nach Anspruch 1, dadurch gekennzeichnet, daß das Innengewinde (2) der Hülse (1) zumindest am geschlossenen Ende eine gegenüber den anderen Gewindegängen unterschiedliche Steigung aufweist.2. tension anchor according to claim 1, characterized in that the internal thread (2) of the sleeve (1) has at least at the closed end a different pitch compared to the other threads. 3.Zuganker nach Anspruch 2, dadurch gekennzeichnet, daß die unterschiedliche Steigung größer ist als die der anderen Gewindegänge.3. tension anchor according to claim 2, characterized in that the different pitch is greater than that of the other threads. 4.Zuganker nach Anspruch 2, dadurch gekennzeichnet, daß die Steigung des Innengewindes (2) der Hülse (1) am geschlossenen Ende derselben am größten ist und sich allmählich verringert und auf halber bis zweidrittel Länge der Hülse (1) eine der Steigung des Gewindes (8) des Ankerstabes (7) entsprechende Steigung aufweist.4.Zuganker according to claim 2, characterized in that the pitch of the internal thread (2) of the sleeve (1) is the largest at the closed end thereof and gradually decreases and to half to two-thirds of the length of the sleeve (1) one of the pitch of the thread (8) of the anchor rod (7) has a corresponding slope. 5.Zuganker nach Anspruch 4, dadurch gekennzeichnet, daß die Gewindegänge (13) des Ankerstabes (7) in den Gewindenuten (12) der Hülse (1) mit Spiel sitzen.5. tension anchor according to claim 4, characterized in that the threads (13) of the anchor rod (7) in the thread grooves (12) of the sleeve (1) sit with play. 6.Zuganker nach Anspruch 1, dadurch gekennzeichnet, daß bei beidseitigem Gewinde der Hülse (1) das Außengewinde (3) kleinere Steigung als das Innengewinde (2) aufweist.6. tension anchor according to claim 1, characterized in that when the sleeve (1) is threaded on both sides, the external thread (3) has a smaller pitch than the internal thread (2). 7. Zuganker nach Anspruch 6, dadurch gekennzeichnet, daß das Außengewinde (3) sägezahnartig ausgebildet ist, wobei die Schrägfläche der Zähne gegen ein geschlossenes Ende der Hülse (1) gerichtet ist.7. Tie rod according to claim 6, characterized in that the external thread (3) is sawtooth-shaped, the inclined surface of the teeth being directed towards a closed end of the sleeve (1). 8.Zuganker nach Anspruch 7, dadurch gekennzeichnet, daß die Gewindegänge des Außengewindes (3) eng aneinanderschließen.8. tension anchor according to claim 7, characterized in that the threads of the external thread (3) close together. 9.Zuganker nach Anspruch 1, dadurch gekennzeichnet, daß die Hülse (1) einschließlich des Außen- und des Innengewindes (3 bzw. 2) als unbearbeitetes, metallisches Gußstück ausgebildet ist, welches vorzugsweise aus Aluminium oder Grauguß besteht.9. tension anchor according to claim 1, characterized in that the sleeve (1) including the external and internal thread (3 and 2) is designed as an unprocessed, metallic casting, which preferably consists of aluminum or cast iron. 10.Zuganker nach Anspruch 9, dadurch gekennzeichnet, daß die Hülse (1) mit einem als keilförmige Schneide ausgebildeten geschlossenen Ende versehen ist.10. tension anchor according to claim 9, characterized in that the sleeve (1) is provided with a closed end designed as a wedge-shaped cutting edge.
EP19800890029 1979-03-05 1980-03-05 Tension bolt for anchoring construction elements in a foundation body Expired EP0015895B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT0164679A AT364921B (en) 1979-03-05 1979-03-05 TIE ANCHOR FOR ANCHORING COMPONENTS IN A BASIC BODY
AT1646/79 1979-03-05

Publications (2)

Publication Number Publication Date
EP0015895A1 true EP0015895A1 (en) 1980-09-17
EP0015895B1 EP0015895B1 (en) 1983-07-20

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EP19800890029 Expired EP0015895B1 (en) 1979-03-05 1980-03-05 Tension bolt for anchoring construction elements in a foundation body

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EP (1) EP0015895B1 (en)
AT (1) AT364921B (en)
DE (1) DE3064188D1 (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0188174A1 (en) * 1985-01-17 1986-07-23 H. Weidmann AG Anchor for wall consolidation in cavity structures
EP0196451A1 (en) * 1985-03-05 1986-10-08 Dyckerhoff & Widmann Aktiengesellschaft Tension element for a rock bolt or the like
AT392968B (en) * 1987-01-30 1991-07-25 Sandoz Ag NEW XANTINE DERIVATIVES
DE19740032A1 (en) * 1997-09-11 1999-03-25 Dyckerhoff & Widmann Ag Reinforcing-rod-anchoring equipment in concrete
WO2003071098A1 (en) * 2002-02-25 2003-08-28 Steffen, Robertson & Kirsten (South Africa) (Pty) Ltd And William David Ortlepp Rock bolt
KR100484021B1 (en) * 2002-10-18 2005-04-20 김국일 Removal-typed nailing apparatus for soil nailing construction method
CN104631454A (en) * 2015-01-29 2015-05-20 山东大学 Inverted wedge type recoverable anchor rod
CN109137903A (en) * 2018-09-06 2019-01-04 山东焱鑫矿用材料加工有限公司 A kind of non-cold working connection steel part with double rotational directions screw thread
CN109339840A (en) * 2018-11-13 2019-02-15 重庆大学 A kind of antitorque large deformation anchor rod

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8708914U1 (de) * 1986-12-05 1987-10-29 EGCO AG, Saanen Zug- oder Druckstab zur Verbindung zweier Betonteile
DE102022200441A1 (en) 2022-01-17 2023-07-20 Cbp Guideway Systems Gmbh Anchoring unit for anchoring in a borehole in a material, anchoring arrangement with such an anchoring unit and method for producing such an anchoring arrangement

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FR1323184A (en) * 1961-04-28 1963-04-05 Applic De Rech S Minieres Et I Self-drilling ankle enhancements
FR1390986A (en) * 1962-12-31 1965-03-05 Standard Pressed Steel Co Threading device, in particular with nut and bolt
FR2077000A5 (en) * 1970-01-26 1971-10-15 Bieri Hans
FR2248738A5 (en) * 1973-10-17 1975-05-16 Potier Claude Joining of concrete reinforcing rods - involves mild steel screwed adaptor formed onto ridged end of high tensile reinforcing rod
DE2557978A1 (en) * 1974-12-24 1976-07-08 Stump Bohr Gmbh Constructional members demountably anchored - with direct anchorage in earth concrete or rock using screw or bayonet fixing
DE2606095B1 (en) * 1976-02-16 1976-12-02 Dyckerhoff & Widmann Ag REMOVABLE INJECTOR ANCHOR WITH DESTRUCTIBLE ANCHOR BODY

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1323184A (en) * 1961-04-28 1963-04-05 Applic De Rech S Minieres Et I Self-drilling ankle enhancements
FR1390986A (en) * 1962-12-31 1965-03-05 Standard Pressed Steel Co Threading device, in particular with nut and bolt
FR2077000A5 (en) * 1970-01-26 1971-10-15 Bieri Hans
FR2248738A5 (en) * 1973-10-17 1975-05-16 Potier Claude Joining of concrete reinforcing rods - involves mild steel screwed adaptor formed onto ridged end of high tensile reinforcing rod
DE2557978A1 (en) * 1974-12-24 1976-07-08 Stump Bohr Gmbh Constructional members demountably anchored - with direct anchorage in earth concrete or rock using screw or bayonet fixing
DE2606095B1 (en) * 1976-02-16 1976-12-02 Dyckerhoff & Widmann Ag REMOVABLE INJECTOR ANCHOR WITH DESTRUCTIBLE ANCHOR BODY

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0188174A1 (en) * 1985-01-17 1986-07-23 H. Weidmann AG Anchor for wall consolidation in cavity structures
US4664573A (en) * 1985-01-17 1987-05-12 H. Weidmann Ag Mine wall support anchor
EP0196451A1 (en) * 1985-03-05 1986-10-08 Dyckerhoff & Widmann Aktiengesellschaft Tension element for a rock bolt or the like
AT392968B (en) * 1987-01-30 1991-07-25 Sandoz Ag NEW XANTINE DERIVATIVES
DE19740032A1 (en) * 1997-09-11 1999-03-25 Dyckerhoff & Widmann Ag Reinforcing-rod-anchoring equipment in concrete
DE19740032C2 (en) * 1997-09-11 2000-04-27 Dyckerhoff & Widmann Ag Device for anchoring a rebar and method for anchoring a sealing base
WO2003071098A1 (en) * 2002-02-25 2003-08-28 Steffen, Robertson & Kirsten (South Africa) (Pty) Ltd And William David Ortlepp Rock bolt
US7445406B2 (en) 2002-02-25 2008-11-04 Steffen, Robertson & Kirsten (South Africa) (Pty) Ltd. Rock bolt
KR100484021B1 (en) * 2002-10-18 2005-04-20 김국일 Removal-typed nailing apparatus for soil nailing construction method
CN104631454A (en) * 2015-01-29 2015-05-20 山东大学 Inverted wedge type recoverable anchor rod
CN104631454B (en) * 2015-01-29 2016-11-30 山东大学 A kind of reverse wedge formula recoverable anchor rod
CN109137903A (en) * 2018-09-06 2019-01-04 山东焱鑫矿用材料加工有限公司 A kind of non-cold working connection steel part with double rotational directions screw thread
CN109339840A (en) * 2018-11-13 2019-02-15 重庆大学 A kind of antitorque large deformation anchor rod
CN109339840B (en) * 2018-11-13 2024-03-05 重庆大学 Anti-torsion large-deformation anchor rod

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Publication number Publication date
EP0015895B1 (en) 1983-07-20
DE3064188D1 (en) 1983-08-25
AT364921B (en) 1981-11-25
ATA164679A (en) 1981-04-15

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