EP0197912A2 - Anchoring device for stressing members - Google Patents

Anchoring device for stressing members Download PDF

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Publication number
EP0197912A2
EP0197912A2 EP86890031A EP86890031A EP0197912A2 EP 0197912 A2 EP0197912 A2 EP 0197912A2 EP 86890031 A EP86890031 A EP 86890031A EP 86890031 A EP86890031 A EP 86890031A EP 0197912 A2 EP0197912 A2 EP 0197912A2
Authority
EP
European Patent Office
Prior art keywords
anchor
anchor body
tendon
wedge
pressed
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
EP86890031A
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German (de)
French (fr)
Other versions
EP0197912B1 (en
EP0197912A3 (en
Inventor
Hermann Dipl.-Ing. Thal
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.)
Vorspann Technik GmbH
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Vorspann Technik GmbH
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Publication of EP0197912A2 publication Critical patent/EP0197912A2/en
Publication of EP0197912A3 publication Critical patent/EP0197912A3/en
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Publication of EP0197912B1 publication Critical patent/EP0197912B1/en
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Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
    • E04C5/08—Members specially adapted to be used in prestressed constructions
    • E04C5/12—Anchoring devices
    • E04C5/122—Anchoring devices the tensile members are anchored by wedge-action
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T24/00—Buckles, buttons, clasps, etc.
    • Y10T24/39—Cord and rope holders
    • Y10T24/3969—Sliding part or wedge
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T403/00—Joints and connections
    • Y10T403/70—Interfitted members
    • Y10T403/7062—Clamped members
    • Y10T403/7064—Clamped members by wedge or cam
    • Y10T403/7066—Clamped members by wedge or cam having actuator

Definitions

  • the invention relates to anchoring for tendons, in particular for prestressing strands or tension rods, wherein at least one tendon is anchored in an anchor body by means of a pressing part.
  • a conventional anchor body is designed as a cone ring, in which an at least two-part ring wedge is used, the inner wall of which is serrated.
  • the teeth of the inner wall press into the surface of the tendon and create notches.
  • the cross-section of the notches can cause the tendon to tear at these points in the event of briefly high static loads or in the case of long-term dynamic loads.
  • the object of the invention is to provide an anchoring and a method for producing the same, by means of which the above risk of premature tearing of the tendon is eliminated or reduced to a minimum.
  • the anchoring of the type mentioned is ' according to the invention characterized in that the tension limb is anchored in at least one anchor body by means of at least two pressed parts penetrated by it and arranged one behind the other, the pressed part further away from the structure being harder or as hard as the tendon and the press part closer to the structure being softer than the tendon.
  • the pressed part closer to the structure is made of plastic or soft metal, whereby soft metal is understood to be a metal which is softer than the tendon, e.g. not hardened steel.
  • a layer of plastic or soft metal is provided on the inside in the pressed part closer to the building,
  • the anchor body consists of a first anchor body which is further away from the building and a second anchor body which is closer to the building, the pressed parts being designed as anchor wedges.
  • the anchor body is designed as a one-piece anchor body, at least the pressed part which is more distant from the farmer being designed as an anchor wedge.
  • the pressing part closer to the building either has a cylindrical shape or it is designed as an anchor wedge, the cone tip of which is directed away from the building.
  • a method for producing an anchor according to the first embodiment is characterized in that the tendon is tensioned first, whereupon the anchor wedge of the first anchor body is pressed in by inserting an intermediate member between the first and the second anchor body, during which the first anchor body is pressed over the intermediate member supports the second anchor body, then the intermediate member is removed and the anchor wedge of the second anchor body is then pressed in via the first anchor body.
  • a method for producing an anchor according to the second embodiment is characterized in that the tendon is first tensioned, whereupon the anchor wedge is pressed into the anchor body by inserting an intermediate member between the anchor body and an anchor plate, during which the anchor body is pressed onto the anchor plate via the intermediate member supported, then the intermediate member removed, and then the cylindrical press part or the anchor wedge is pressed over the anchor body.
  • Fig. 1, 1 denotes the tendon in the form of a tendon, tension wire or the like.
  • 2 designates a first anchor body in the form of a cone ring, which is supported via an intermediate member 3 in the form of a two-part washer ring on a second anchor body 4, which is also designed as a cone ring and is supported on an anchor plate 5.
  • anchor wedges 6 and 7 are used in the form of ring wedges.
  • the anchoring is produced in such a way that the tendon 1 is tensioned first, whereupon the anchor wedge 6 is pressed into the first anchor body 2, during which the anchor member 4 is supported on the anchor body 4 via the intermediate member 3. Thereafter, the two-part intermediate member 3 is removed, wherein the tendon 1 is re-tensioned, so that the first anchor body 2 lifts slightly from the intermediate member 3.
  • the tendon 1 is then relaxed, so that the first anchor body 2 initially rests on the anchor wedge 7 of the second anchor body 4, as shown in FIG. 2, whereupon by further relaxing the tendon 1, the anchor wedge 7 is pressed into the second anchor body 4 via the first anchor body 2 takes place until the first anchor body 2 rests directly on the second anchor body 4, as shown in FIG.
  • the pressing in can also be carried out or supported mechanically by means of a pressing device. If necessary, a small Ab stood between the two anchor bodies 2 and 4 are observed, ie that the first anchor body 2 is supported in the end position on the anchor wedge 7 of the second anchor body 4. When pressed in, the softer material of the anchor wedge 7 penetrates or "flows" into the cavities between the prestressing strands.
  • the anchor bodies 2 'and 4' accordingly each have three conical openings in which the anchor wedges 2 'and 4' are inserted. Accordingly, the intermediate member 3 'has three openings.
  • the anchor plate 5 ' has only one opening for the passage of the three tendons 1.
  • the anchoring takes place in the same way as in the first embodiment, i.e. the installation phases shown in FIGS. 4, 5 and 6 correspond to those of FIGS. 1 to 3.
  • Plastic or soft metal is preferably used as the material for the anchor wedges 7 of the second anchor body 4 or 4 ', whereby soft metal is to be understood as a metal which is softer than the tendon, for example non-hardened steel.
  • soft metal is to be understood as a metal which is softer than the tendon, for example non-hardened steel.
  • FIGS. 7 and 8 it is provided that these consist partly of plastic or soft metal.
  • a conical inner part 8 made of plastic or soft metal is provided, which is surrounded by a conical outer part 9.
  • a cylindrical inner part 8 'made of plastic or soft metal is provided, which is surrounded by a conical outer part 9'.
  • the inner parts 8, 8 'and the outer parts 9, 9' can either be inserted loosely into one another or connected, for example, by gluing.
  • There is also a possibility that on a sleeve made of plastic or soft metal is attached to the tendon 1, which corresponds to the inner part 8 or 8 ', on which the outer
  • the anchor is particularly suitable for use with cable-stayed bridge constructions.
  • the pressing part 7 ' has a cylindrical shape and is located together with the armature wedge 6 in a one-piece armature body 8. Between the armature body 8 and the armature plate 5, an intermediate member 3 in the form of a two-part washer is provided .
  • the anchoring is produced in such a way that the tendon 1 is tensioned first, whereupon the anchor wedge 6 is pressed into the anchor body 8, while the latter is supported on the anchor plate 5 via the intermediate member 3. Thereafter, the intermediate member 3 is removed, the tendon 1 being re-tensioned, so that the anchor body 8 lifts slightly from the intermediate member 3. Subsequently, the tendon 1 is relaxed, so that the anchor body 8 initially rests on the end face of the cylindrical pressing part 7 ', as shown in FIG. 11, whereupon by further relaxing the tendon 1, the pressing part 7' is pressed into the anchor body 8 or into the Cavities of the tendon 1 take place until the anchor body 8 rests directly on the anchor plate 5, as shown in FIG. 12.
  • the pressing can in turn be carried out or supported mechanically by means of a pressing device. If necessary, a small distance between the anchor body 8 and the anchor plate 5 can also be maintained, so that the anchor body 8 is supported in the end position on the pressing part 7 'on the anchor plate 5.
  • the pressing part is designed as an anchor wedge 7 ′′, the cone tip of which, however, is directed away from the building.
  • the anchoring is produced in the same way as in the third exemplary embodiment, so that a description thereof is unnecessary. It is understood that the embodiments of the pressed parts or anchor wedges according to FIGS. 7 and 8 can also be used in the embodiments according to FIGS. 10 to 12 and 13 to 15, and that these embodiments also for several tendons, similar to in 4 to 6, can be used.

Abstract

@ Eine Verankerung für Spannglieder, insbesondere für Spannlitzen, besteht aus zumindest zwei hintereinander auf dem Spannglied (1) angeordneten Preßteilen in Form von Ankerkeilen (6, 7), die in zumindest einem Ankerkörper (2,4) verankert sind. Der vom Bauwerk entferntere Preßteil (6) ist härter oder gleich hart wei das Spannglied (1), während der dem Bauwerk näher gelegene Preßteil (7) weicher als das Spannglied (1) ist. Zuerst wird das Spannglied gespannt, worauf unter Einsetzen eines Zwischenglieds (3) zwischen dem ersten und dem zweiten Ankerkörper (2,4) der Ankerkeil (6) des ersten Ankerkörpers (2) eingepreßt wird, währenddessen sich der erste Ankerkörper (2) über das Zwischenglied (3) auf dem zweiten Ankerkörper (4) abstützt, anschließend das Zwischenglied (3) entfernt und darauffolgend der Ankerkeil (7) des zweiten Ankerkörpers (4) über den ersten Ankerkörper (2) eingepreßt wird.

Figure imgaf001
@ Anchoring for tendons, in particular for prestressing strands, consists of at least two pressed parts arranged one behind the other on the tendon (1) in the form of anchor wedges (6, 7), which are anchored in at least one anchor body (2,4). The more distant press part (6) is harder or equally hard white the tendon (1), while the press part (7) closer to the building is softer than the tendon (1). First, the tendon is tensioned, whereupon an anchor wedge (6) of the first anchor body (2) is pressed in between the first and the second anchor body (2, 4), during which the first anchor body (2) is pressed over the Supporting the intermediate link (3) on the second anchor body (4), then removing the intermediate link (3) and then pressing the anchor wedge (7) of the second anchor body (4) over the first anchor body (2).
Figure imgaf001

Description

Die Erfindung betrifft eine Verankerung für Spannglieder, insbesondere für Spannlitzen oder Spannstäbe, wobei mindestens ein Spannglied mittels eines Preßteils in einem Ankerkörper verankert ist.The invention relates to anchoring for tendons, in particular for prestressing strands or tension rods, wherein at least one tendon is anchored in an anchor body by means of a pressing part.

Ein herkömmlicher Ankerkörper ist als Konusring ausgebildet, in welchen ein zumindest zweiteilig ausgebildeter Ringkeil eingesetzt wird, dessen Innenwandung gezahnt ist. Beim Einpressen des Ringkeils drückt sich die Zahnung der Innenwandung in die Oberfläche des Spannglieds ein und erzeugt Einkerbungen. Im gespannten Zustand des Spannglieds kann es bedingt durch die Querschnittsverminderung an den Einkerbungen bei kurzzeitig hohen statischen Beanspruchungen oder bei langanhaltenden dynamischen Belastungen zum Zerreißen des Spannglieds an diesen Stellen kommen.A conventional anchor body is designed as a cone ring, in which an at least two-part ring wedge is used, the inner wall of which is serrated. When the ring wedge is pressed in, the teeth of the inner wall press into the surface of the tendon and create notches. In the tensioned state of the tendon, the cross-section of the notches can cause the tendon to tear at these points in the event of briefly high static loads or in the case of long-term dynamic loads.

Aufgabe der Erfindung ist die Schaffung einer Verankerung sowie eines Verfahrens zur Herstellung derselben, durch welche obige Gefahr des frühzeitigen Zerreißens des Spannglieds beseitigt, bzw. auf ein Minimum reduziert wird.The object of the invention is to provide an anchoring and a method for producing the same, by means of which the above risk of premature tearing of the tendon is eliminated or reduced to a minimum.

Die Verankerung der eingangs genannten Art ist erfindungsgemäß'dadurch gekennzeichnet, daß das Spannglied mittels mindestens zwei von diesem durchsetzten und hintereinander angeordneten Preßteilen in zumindest einem Ankerkörper verankert ist, wobei der vom Bauwerk entferntere Preßteil härter oder gleich hart wie das Spannglied und der dem Bauwerk nähergelegene Preßteil weicher als das Spannglied ist.The anchoring of the type mentioned is ' according to the invention characterized in that the tension limb is anchored in at least one anchor body by means of at least two pressed parts penetrated by it and arranged one behind the other, the pressed part further away from the structure being harder or as hard as the tendon and the press part closer to the structure being softer than the tendon.

In vorteilhafter Weise besteht der dem Bauwerk näher gelegene Preßteil aus Kunststoff oder Weichmetall, wobei unter Weichmetall ein Metall zu verstehen ist, welches weicher als das Spannglied ist, z.B. nicht gehärteter Stahl.Advantageously, the pressed part closer to the structure is made of plastic or soft metal, whereby soft metal is understood to be a metal which is softer than the tendon, e.g. not hardened steel.

In Ausgestaltung der Erfindung ist vorgesehen, daß in dem dem Bauwerk näher gelegenen Preßteil innenseitig eine Schichte aus Kunststoff oder Weichmetall vorgesehen ist,In an embodiment of the invention it is provided that a layer of plastic or soft metal is provided on the inside in the pressed part closer to the building,

Gemäß einer ersten Ausführungsform besteht der Ankerkörper aus einem vom Bauwerk entfernteren ersten Ankerkörper und einem, dem Bauwerk näher gelegenen zweiten Ankerkörper, wobei die Preßteile als Ankerkeile ausgebildet sind.According to a first embodiment, the anchor body consists of a first anchor body which is further away from the building and a second anchor body which is closer to the building, the pressed parts being designed as anchor wedges.

Gemäß einer zweiten Ausführungsform ist der Ankerkörper als einteiliger Ankerkörper ausgebildet, wobei zumindest der vom Bauerk entferntere Preßteil als Ankerkeil ausgebildet ist. Bei dieser Ausführungsform weist der dem Bauwerk näher gelegene Preßteil entweder eine zylindrische Form auf, oder er ist als Ankerkeil ausgebildet, dessen Konusspitze vom Bauwerk weggerichtet ist.According to a second embodiment, the anchor body is designed as a one-piece anchor body, at least the pressed part which is more distant from the farmer being designed as an anchor wedge. In this embodiment, the pressing part closer to the building either has a cylindrical shape or it is designed as an anchor wedge, the cone tip of which is directed away from the building.

Ein Verfahren zur Herstellung einer Verankerung gemäß der ersten Ausführungsform ist dadurch gekennzeichnet, daß das Spannglied zuerst gespannt wird, worauf unter Einsetzen eines Zwischenglieds zwischen dem ersten und dem zweiten Ankerkörper der Ankerkeil des ersten Ankerkörpers eingepreßt wird, währenddessen sich der erste Ankerkörper über das Zwischenglied auf dem zweiten Ankerkörper abstützt, anschließend das Zwischenglied entfernt und darauffolgend der Ankerkeil des zweiten Ankerkörpers über den ersten Ankerkörper eingepreßt wird.A method for producing an anchor according to the first embodiment is characterized in that the tendon is tensioned first, whereupon the anchor wedge of the first anchor body is pressed in by inserting an intermediate member between the first and the second anchor body, during which the first anchor body is pressed over the intermediate member supports the second anchor body, then the intermediate member is removed and the anchor wedge of the second anchor body is then pressed in via the first anchor body.

Ein Verfahren zur Herstellung einer Verankerung gemäß der zweiten Ausführungsform ist dadurch gekennzeichnet, daß das Spannglied zuerst gespannt wird, worauf unter Einsetzen eines Zwischenglieds zwischen dem Ankerkörper und einer Ankerplatte der Ankerkeil in den Ankerkörper eingepreßt wird, währenddessen sich der Ankerkörper über das Zwischenglied auf der Ankerplatte abstützt, anschließend das Zwischenglied entfernt, und darauffolgend der zylindrische Preßteil bzw. der Ankerkeil über den Ankerkörper eingepreßt wird.A method for producing an anchor according to the second embodiment is characterized in that the tendon is first tensioned, whereupon the anchor wedge is pressed into the anchor body by inserting an intermediate member between the anchor body and an anchor plate, during which the anchor body is pressed onto the anchor plate via the intermediate member supported, then the intermediate member removed, and then the cylindrical press part or the anchor wedge is pressed over the anchor body.

Die Erfindung wird nachfolgend anhand mehrerer Ausführungsbeispiele mit Hilfe der Zeichnung beschrieben.The invention is described below using several exemplary embodiments with the aid of the drawing.

Es zeigen

  • Fig. 1 bis 3 ein erstes Ausführungsbeispiel einer Verankerung während des Spann- bzw. Preßvorganges,
  • Fig. 4 bis 6 ein zweites Ausführungsbeispiel einer Verankerung während des Spann- bzw. Preßvorganges,
  • Fig. 7 und 8 zwei Beispiele von Ankerkeilen,
  • Fig. 9 ein Diagramm zur Erläuterung des Verlaufs der Zugkraft entlang des Spannglieds,
  • Fig. 10 bis 12 ein drittes Ausführungsbeispiel einer Verankerung während des Spann- bzw. Preßvorgangs, und
  • Fig. 13 bis 15 ein viertes Ausführungsbeispiel einer Verankerung während des Spann- bzw. Preßvorgangs.
Show it
  • 1 to 3 a first embodiment of an anchoring during the tensioning or pressing process,
  • 4 to 6 a second embodiment of an anchoring during the tensioning or pressing process,
  • 7 and 8 two examples of anchor wedges,
  • 9 is a diagram for explaining the course of the tensile force along the tendon,
  • 10 to 12 a third embodiment of an anchoring during the tensioning or pressing process, and
  • 13 to 15 a fourth embodiment of an anchoring during the tensioning or pressing process.

In Fig. 1 bezeichnet 1 das Spannglied in Form einer Spannlitze, Spanndraht od.dgl. Mit 2 ist ein erster Ankerkörper in Form eines Konusringes bezeichnet, welcher sich über ein Zwischenglied 3 in Form eines zweiteiligen Unterlagsrings an einen zweiten Ankerkörper 4 abstützt, der ebenfalls als Konusring ausgebildet ist und sich an eine Ankerplatte 5 abstützt. Im ersten und zweiten Ankerkörper 2 und 4 sind Ankerkeile 6 bzw. 7 in Form von Ringkeilen eingesetzt.In Fig. 1, 1 denotes the tendon in the form of a tendon, tension wire or the like. 2 designates a first anchor body in the form of a cone ring, which is supported via an intermediate member 3 in the form of a two-part washer ring on a second anchor body 4, which is also designed as a cone ring and is supported on an anchor plate 5. In the first and second anchor body 2 and 4 anchor wedges 6 and 7 are used in the form of ring wedges.

Die Herstellung der Verankerung erfolgt in der Weise, daß zuerst das Spannglied 1 gespannt wird, -worauf der Ankerkeil 6 in den ersten Ankerkörper 2 eingepreßt wird, währenddessen sich dieser über das Zwischenglied 3 am Ankerkörper 4 abstützt. Danach wird das zweiteilige Zwischenglied 3 entfernt, wobei-das Spannglied 1 nachgespannt wird, sodaß sich der erste Ankerkörper 2 etwas vom Zwischenglied 3 abhebt. Anschließend wird das Spannglied 1 entspannt, sodaß der erste Ankerkörper 2 am Ankerkeil 7 des zweiten Ankerkörpers 4 zunächst anliegt, wie in Fig. 2 dargestellt, worauf durch weiteres Entspannen des Spannglieds 1 das Einpressen des Ankerkeil 7 in den zweiten Ankerkörper 4 über den ersten Ankerkörper 2 erfolgt, bis der erste Ankerkörper 2 direkt am zweiten Ankerkörper 4 aufliegt, wie in Fig.3 dargestellt. Das Einpressen kann auch maschinell mittels einer Preßvorrichtung erfolgen, bzw. unterstützt werden. Gegebenenfalls kann aber auch ein geringer Abstand zwischen den beiden Ankerkörpern 2 und 4 eingehalten werden, d.h. daß sich der erste Ankerkörper 2 in der Endlage auf den Ankerkeil 7 des zweiten Ankerkörpers 4 abstützt. Beim Einpressen dringt bzw. "fließt" das weichere Material des Ankerkeils 7 in die Hohlräume zwischen den Spannlitzen ein.The anchoring is produced in such a way that the tendon 1 is tensioned first, whereupon the anchor wedge 6 is pressed into the first anchor body 2, during which the anchor member 4 is supported on the anchor body 4 via the intermediate member 3. Thereafter, the two-part intermediate member 3 is removed, wherein the tendon 1 is re-tensioned, so that the first anchor body 2 lifts slightly from the intermediate member 3. The tendon 1 is then relaxed, so that the first anchor body 2 initially rests on the anchor wedge 7 of the second anchor body 4, as shown in FIG. 2, whereupon by further relaxing the tendon 1, the anchor wedge 7 is pressed into the second anchor body 4 via the first anchor body 2 takes place until the first anchor body 2 rests directly on the second anchor body 4, as shown in FIG. The pressing in can also be carried out or supported mechanically by means of a pressing device. If necessary, a small Ab stood between the two anchor bodies 2 and 4 are observed, ie that the first anchor body 2 is supported in the end position on the anchor wedge 7 of the second anchor body 4. When pressed in, the softer material of the anchor wedge 7 penetrates or "flows" into the cavities between the prestressing strands.

Beim zweiten Ausführungsbeispiel nach Fig. 4 bis 6 sind drei Spannglieder 1 vorgesehen. Die Ankerkörper 2' und 4' weisen demnach jeweils drei konusförmige öffnungen auf, in welche die Ankerkeile 2' und 4' eingesetzt sind. Dementsprechend weist auch das Zwischenglied 3' drei Öffnungen auf. Die Ankerplatte 5' weist nur eine öffnung für den Durchgang der drei Spannglieder 1 auf.In the second embodiment according to FIGS. 4 to 6, three tendons 1 are provided. The anchor bodies 2 'and 4' accordingly each have three conical openings in which the anchor wedges 2 'and 4' are inserted. Accordingly, the intermediate member 3 'has three openings. The anchor plate 5 'has only one opening for the passage of the three tendons 1.

Die Verankerung erfolgt in der gleichen Weise wie beim ersten Ausführungsbeispiel, d.h. die in Fig. 4, 5 und 6 dargestellten Einbauphasen entsprechen denen der Fig. 1 bis 3.The anchoring takes place in the same way as in the first embodiment, i.e. the installation phases shown in FIGS. 4, 5 and 6 correspond to those of FIGS. 1 to 3.

Als Material für die Ankerkeile 7 des zweiten Ankerkörpers 4 bzw. 4' dient vorzugsweise Kunststoff oder Weichmetall, wobei unter Weichmetall ein-Metall zu verstehen ist, das weicher als das Spannglied ist, z.B. nicht gehärteter Stahl. Gemäß den Ankerkeilen nach Fig. 7 und 8 ist vorgesehen, daß diese teilweise aus Kunststoff oder Weichmetall bestehen. Nach Fig. 7 ist ein konischer Innenteil 8 aus Kunststoff oder Weichmetall vorgesehen, der von einem konischen Außenteil 9 umgeben ist. Nach Fig. 8 ist ein zylindrischer Innenteil 8' aus Kunststoff oder Weichmetall vorgesehen, der von einem konischen Außenteil 9' umgeben ist. Die Innenteile 8, 8' und die Außenteile 9, 9' können entweder lose ineinandergesteckt oder z.B. durch Klebung verbunden sein. Es besteht auch die Möglichkeit, daß auf dem Spannglied 1 eine Hülse aus Kunststoff oder Weichmetall aufgezogen wird, die dem Innenteil 8 bzw. 8' entspricht, auf welcher dann der Außenteil 9 bzw. 9' aufgesteckt wird.Plastic or soft metal is preferably used as the material for the anchor wedges 7 of the second anchor body 4 or 4 ', whereby soft metal is to be understood as a metal which is softer than the tendon, for example non-hardened steel. According to the anchor wedges according to FIGS. 7 and 8, it is provided that these consist partly of plastic or soft metal. 7, a conical inner part 8 made of plastic or soft metal is provided, which is surrounded by a conical outer part 9. 8, a cylindrical inner part 8 'made of plastic or soft metal is provided, which is surrounded by a conical outer part 9'. The inner parts 8, 8 'and the outer parts 9, 9' can either be inserted loosely into one another or connected, for example, by gluing. There is also a possibility that on a sleeve made of plastic or soft metal is attached to the tendon 1, which corresponds to the inner part 8 or 8 ', on which the outer part 9 or 9' is then attached.

Fig. 9 zeigt in einem Diagramm den Spannkraftverlauf V0 entlang des Spannglieds 1 in seiner Längsachse X. I bezeichnet den freien Bereich des Spannglieds 1, II den Bereich innerhalb des zweiten Ankerkörpers 4, und III den Bereich innerhalb des ersten Ankerkörpers 2. Es ist ersichtlich, daß innerhalb des zweiten Ankerkörpers 4 die Spannkraft um ΔV abnimmt, und innerhalb des ersten Ankerkörpers 2 auf Null abgebaut wird (Kurve a). Die mit strichlierter Linie eingezeichnete Kurve b zeigt den Spannkraftverlauf, wenn nur der erste Ankerkörper 2 vorhanden wäre. Durch die Anordnung des zweiten Ankerkörpers 4 vor dem ersten Ankerkörper 2 wird ein Abbau der Spannkraft um AV von Δ% erreicht. Durch diese Maßnahme ergibt sich eine Steigerung der Dehnung des Spannglieds bei statischer Belastung um ein Mehrfaches und eine Steigerung der Bruchlast bis zur größtmöglichen. Bei dynamischer Belastung wird die Ermüdungsfestigkeit wesentlich gesteigert, d. h. die Wechselbeanspruchung Δδ erhöht. Die Dauerfestigkeit des auf diese Weise verankerten Spannglieds , entspricht nahezu der einer durch die Verankerung ungestörten Belastung des Spannglieds. Die Verankerung ist insbesondere zum Einsatz bei Schrägkabelbrückenkonstruktionen geeignet.9 shows in a diagram the tension force curve V 0 along the tendon 1 in its longitudinal axis X. I denotes the free area of the tendon 1, II the area within the second anchor body 4, and III the area within the first anchor body 2. It is It can be seen that the tensioning force decreases by Δ V within the second anchor body 4 and is reduced to zero within the first anchor body 2 (curve a). Curve b drawn with a broken line shows the tension force curve if only the first anchor body 2 were present. By arranging the second anchor body 4 in front of the first anchor body 2, a reduction in the tension force of AV of Δ% is achieved. This measure results in an increase in the elongation of the tendon under static load by a multiple and an increase in the breaking load to the greatest possible. With dynamic loading, the fatigue strength is increased significantly, ie the alternating stress Δδ increases. The fatigue strength of the tendon anchored in this way almost corresponds to that of the stressing of the tendon undisturbed by the anchoring. The anchor is particularly suitable for use with cable-stayed bridge constructions.

Beim dritten Ausführungsbeispiel nach Fig. 10 bis 12 weist der Preßteil 7' eine zylindrische Form auf und befindet sich zusammen mit dem Ankerkeil 6 in einem einteiligen Ankerkörper 8. Zwischen dem Ankerkörper 8 und der Ankerplatte 5 ist ein Zwischenglied 3 in Form eines zweiteiligen Unterlagsringes vorgesehen.In the third exemplary embodiment according to FIGS. 10 to 12, the pressing part 7 'has a cylindrical shape and is located together with the armature wedge 6 in a one-piece armature body 8. Between the armature body 8 and the armature plate 5, an intermediate member 3 in the form of a two-part washer is provided .

Die. Herstellung der Verankerung erfolgt in der Weise, daß zuerst das Spannglied 1 gespannt wird, worauf der Ankerkeil 6 in den Ankerkörper 8 eingepreßt wird, während sich dieser über das Zwischenglied 3 auf der Ankerplatte 5 abstützt. Danach wird das Zwischenglied 3 entfernt, wobei das Spannglied 1 nachgespannt wird, sodaß sich der Ankerkörper 8 etwas vom Zwischenglied 3 abhebt. Anschließend wird das Spannglied 1 entspannt, sodaß der Ankerkörper 8 an der Stirnseite des zylindrischen Preßteiles 7' zunächst anliegt, wie in Fig. 11 dargestellt, worauf durch weiteres Entspannen des Spannglieds 1 das Einpressen des Preßteiles 7' in den Ankerkörper 8 bzw. in die Hohlräume des Spannglieds 1 erfolgt, bis der Ankerkörper 8 direkt auf der Ankerplatte 5 anliegt, wie in Fig. 12 dargestellt. Das Einpressen kann wiederum maschinell mittels einer Preßvorrichtung erfolgen, bzw. unterstützt werden. Gegebenenfalls kann aber auch ein geringer Abstand zwischen dem Ankerkörper 8 und der Ankerplatte 5 eingehalten werden, sodaß sich der Ankerkörper 8 in der Endlage über den Preßteil 7' auf der Ankerplatte 5 abstützt.The. The anchoring is produced in such a way that the tendon 1 is tensioned first, whereupon the anchor wedge 6 is pressed into the anchor body 8, while the latter is supported on the anchor plate 5 via the intermediate member 3. Thereafter, the intermediate member 3 is removed, the tendon 1 being re-tensioned, so that the anchor body 8 lifts slightly from the intermediate member 3. Subsequently, the tendon 1 is relaxed, so that the anchor body 8 initially rests on the end face of the cylindrical pressing part 7 ', as shown in FIG. 11, whereupon by further relaxing the tendon 1, the pressing part 7' is pressed into the anchor body 8 or into the Cavities of the tendon 1 take place until the anchor body 8 rests directly on the anchor plate 5, as shown in FIG. 12. The pressing can in turn be carried out or supported mechanically by means of a pressing device. If necessary, a small distance between the anchor body 8 and the anchor plate 5 can also be maintained, so that the anchor body 8 is supported in the end position on the pressing part 7 'on the anchor plate 5.

Beim vierten Ausführungsbeispiel nach Fig. 13 bis 15 ist der Preßteil als Ankerkeil 7" ausgebildet, dessen Konusspitze jedoch vom Bauwerk weggerichtet ist.In the fourth embodiment according to FIGS. 13 to 15, the pressing part is designed as an anchor wedge 7 ″, the cone tip of which, however, is directed away from the building.

Die Herstellung der Verankerung erfolgt in der gleichen Weise wie beim dritten Ausführungsbeispiel, sodaß sich eine Beschreibung derselben erübrigt. Es versteht sich, daß die Ausführungsformen der Preßteile bzw. Ankerkeile nach Fig. 7 und 8 ebenfalls bei den Ausführungsbeispielen nach Fig. 10 bis 12, bzw. 13 bis 15 angewendet werden können, und daß diese Ausführungsbeispiele auch für mehrere Spannglieder, ähnlich wie in Fig. 4 bis 6 dargestellt, eingesetzt werden können.The anchoring is produced in the same way as in the third exemplary embodiment, so that a description thereof is unnecessary. It is understood that the embodiments of the pressed parts or anchor wedges according to FIGS. 7 and 8 can also be used in the embodiments according to FIGS. 10 to 12 and 13 to 15, and that these embodiments also for several tendons, similar to in 4 to 6, can be used.

Claims (15)

1. Verankerung für Spannglieder, insbesondere Spannlitzen oder Spannstäbe, wobei mindestens ein Spannglied mittels eines Preßteiles in einem Ankerkörper verankert ist, dadurch gekennzeichnet, daß das Spannglied (1) mittels mindestens zwei von diesem durchsetzten und hintereinander angeordneten Preßteilen (6,7,7',7") in zumindest einem Ankerkörper (2,4,8) verankert ist, wobei der vom Bauwerk entferntere Preßteil (6) härter oder gleich hart wie das Spannglied (1) und der dem Bauwerk näher gelegene Preßteil (7,7',711) weicher als das Spannglied (1) ist.1. Anchoring for tendons, in particular tendons or tendons, at least one tendon being anchored in an anchor body by means of a pressing part, characterized in that the tendon (1) by means of at least two pressing parts penetrated by it and arranged one behind the other (6, 7, 7 ') , 7 ") is anchored in at least one anchor body (2, 4, 8), the press part (6) that is farther from the building being harder or as hard as the tendon (1) and the press part (7, 7 ', 7 11 ) is softer than the tendon (1). 2. Verankerung nach Anspruch 1, dadurch gekennzeichnet, daß der dem Bauwerk näher gelegene Preßteil (7,7',7") aus Kunststoff oder Weichmetall besteht, wobei unter Weichmetall ein Metall zu verstehen ist, das weicher als das Spannglied ist, z.B. nicht gehärteter Stahl.2. Anchoring according to claim 1, characterized in that the pressed part closer to the building (7, 7 ', 7 ") consists of plastic or soft metal, whereby soft metal is to be understood as a metal which is softer than the tendon, for example not hardened steel. 3. Verankerung nach Anspruch 1, dadurch gekennzeichnet, daß in dem dem Bauwerk näher gelegenen Preßteil (7, 7',7") innenseitig eine Schichte aus Kunststoff oder Weichmetall vorgesehen ist.3. Anchoring according to claim 1, characterized in that a layer of plastic or soft metal is provided on the inside in the pressed part (7, 7 ', 7 ") closer to the building. 4. Verankerung nach Anspruch 1, dadurch gekennzeichnet, daß der Ankerkörper aus einem vom Bauwerk entfernteren ersten Ankerkörper (2) und einem dem Bauwerk näher gelegenen zweiten Ankerkörper (4) besteht, wobei die Preßteile als Ankerkeile (6,7) ausgebildet sind.4. Anchoring according to claim 1, characterized in that the anchor body consists of a distant from the structure first anchor body (2) and a closer to the structure second anchor body (4), wherein the pressing parts are designed as anchor wedges (6,7). 5. Verankerung nach Anspruch 1, dadurch gekennzeichnet, daß der Ankerkörper als einteiliger Ankerkörper (8) ausgebildet ist, wobei zumindest der vom Bauwerk entferntere Preßteil als Ankerkeil (6) ausgebildet ist.5. Anchoring according to claim 1, characterized in that the anchor body is designed as a one-piece anchor body (8), wherein at least the more distant pressing part is designed as an anchor wedge (6). 6. Verankerung nach Anspruch 5, dadurch gekennzeichnet, daß der dem Bauwerk näher gelegene Preßteil (7') eine zylindrische Form aufweist.6. Anchoring according to claim 5, characterized in that the pressed part closer to the building (7 ') has a cylindrical shape. 7. Verankerung nach Anspruch 5, dadurch gekennzeichnet, daß der dem Bauwerk näher gelegene Preßteil als Ankerkeil (7") ausgebildet ist, dessen Konusspitze vom Bauwerk weggerichtet ist.7. Anchoring according to claim 5, characterized in that the pressed part closer to the structure is designed as an anchor wedge (7 "), the cone tip of which is directed away from the structure. 8. Verfahren zur Herstellung einer Verankerung von Spanngliedern nach den Ansprüchen 1 und 4, dadurch gekennzeichnet, daß das Spannglied (1) zuerst gespannt wird, worauf unter Einsetzen eines Zwischengliedes (3) zwischen dem ersten und dem zweiten Ankerkörper (2,4) der Ankerkeil (6) des ersten Ankerkörpers (2) eingepreßt wird, währenddessen sich der erste Ankerkörper (2) über das Zwischenglied (3) auf dem zweiten Ankerkörper (4) abstützt, anschließend das Zwischenglied (3) entfernt und darauffolgend der Ankerkeil (7) des zweiten Ankerkörpers (4) über den ersten Ankerkörper (2) eingepreßt wird.8. A method for producing anchoring of tendons according to claims 1 and 4, characterized in that the tendon (1) is tensioned first, whereupon the insertion of an intermediate member (3) between the first and the second anchor body (2,4) Anchor wedge (6) of the first anchor body (2) is pressed in, during which the first anchor body (2) is supported by the intermediate member (3) on the second anchor body (4), then the intermediate member (3) is removed and then the anchor wedge (7) of the second anchor body (4) is pressed in via the first anchor body (2). 9. Verfahren nach Anspruch 8, dadurch gekennzeichnet, daß das Spannglied (1) zum Zweck der Entfernung des Zwischenglieds (3) nach dem Einpressen des Anker- kei.ls (6) in den ersten Ankerkörper (2) nachgespannt wird.9. The method according to claim 8, characterized in that the tendon (1) for the purpose of removing the intermediate member (3) after pressing the anchor kei.ls (6) in the first anchor body (2) is re-tensioned. 10. Verfahren nach den Ansprüchen 8 und 9, dadurch gekennzeichnet, daß nach dem Entfernen des Zwischenglieds (3) das Spannglied (1) entspannt wird, bis der erste Ankerkörper (2) am Ankerkeil (7) des zweiten Ankerkörpers (4) anliegt und anschließend das Einpressen des Ankerkeils (7) in den zweiten Ankerkörper (4) erfolgt.10. The method according to claims 8 and 9, characterized in that after removal of the intermediate member (3), the tendon (1) is relaxed until the first anchor body (2) on the anchor wedge (7) of the second anchor body (4) and the anchor wedge (7) is then pressed into the second anchor body (4). 11. Verfahren nach Anspruch 10, dadurch gekennzeichnet, daß das Einpressen des Ankerkeils (7) in den zweiten Ankerkörper (4) bis zum direkten Anliegen des ersten Ankerkörpers (2) auf dem zweiten Ankerkörper (4) erfolgt.11. The method according to claim 10, characterized in that the pressing of the anchor wedge (7) into the second anchor body (4) until the first anchor body (2) lies directly on the second anchor body (4). 12. Verfahren nach den Ansprüchen 1, 5, 6 oder 7, dadurch gekennzeichnet, daß das Spannglied (1) zuerst gespannt wird, worauf unter Einsetzen eines Zwischenglieds (3) zwischen dem Ankerkörper (8) und einer Ankerplatte (5) der Ankerkeil (6) in den Ankerkörper (8) eingepreßt wird, währenddessen sich der Ankerkörper (8) über das Zwischenglied (3) auf der Ankerplatte (5) abstützt, anschließend das Zwischenglied entfernt, und darauffolgend der zylindrische Preßteil (7') bzw. der Ankerkeil (7") über den Ankerkörper (8) eingepreßt wird.12. The method according to claims 1, 5, 6 or 7, characterized in that the tendon (1) is tensioned first, whereupon inserting an intermediate member (3) between the anchor body (8) and an anchor plate (5) of the anchor wedge ( 6) is pressed into the anchor body (8), during which the anchor body (8) is supported on the anchor plate (5) via the intermediate member (3), then the intermediate member is removed, and then the cylindrical press part (7 ') or the anchor wedge (7 ") is pressed in via the anchor body (8). 13. Verfahren nach Anspruch 12, dadurch gekennzeichnet, daß das Spannglied zum Zweck der Entfernung des Zwischenglieds (3) nach dem Einpressen des Ankerkeils (6) in den Ankerkörper (8) nachgespannt wird.13. The method according to claim 12, characterized in that the tendon for the purpose of removing the intermediate member (3) after the pressing of the anchor wedge (6) in the anchor body (8) is tightened. 14. Verfahren nach den Ansprüchen 12 und 13, dadurch gekennzeichnet, daß nach dem Entfernen des Zwischenglieds das Spannglied (1) entspannt wird, bis sich der Ankerkörper (8) über den zylindrischen Preßteil (7') bzw. über den Ankerkeil (7") an der Ankerplatte (5) abstützt und anschließend das Einpressen des zylindrischen Preßteils (7') bzw. des Ankerkeils (7") in den Ankerkörper (8) erfolgt.14. The method according to claims 12 and 13, characterized in that after the removal of the intermediate member, the tendon (1) is relaxed until the anchor body (8) over the cylindrical pressing part (7 ') or over the anchor wedge (7 " ) is supported on the anchor plate (5) and then the cylindrical press part (7 ') or the anchor wedge (7 ") is pressed into the anchor body (8). 15. Verfahren nach Anspruch 14, dadurch gekennzeichnet, daß das Einpressen des zylindrischen Preßteils (7') bzw. des Ankerkeils (7") in den Ankerkörper (8) bis zum direkten Anliegen desselben auf der Ankerplatte (5) erfolgt.15. The method according to claim 14, characterized in that the pressing of the cylindrical pressing part (7 ') or the anchor wedge (7 ") in the anchor body (8) until the same directly on the anchor plate (5).
EP86890031A 1985-03-05 1986-02-13 Anchoring device for stressing members Expired - Lifetime EP0197912B1 (en)

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AT646/85 1985-03-05
AT0064685A AT390100B (en) 1985-03-05 1985-03-05 ANCHORAGE FOR TENSION LINKS

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EP0197912A3 EP0197912A3 (en) 1987-05-27
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WO2005061813A1 (en) 2003-12-22 2005-07-07 Austria Wirtschaftsservice Gesellschaft M.B.H. Anchoring for pre-tensioned and/or stressed tensile elements
US7857542B2 (en) 2003-12-22 2010-12-28 Austria Wirtschaftsservice Gesellschaft M.B.H. Anchoring for pre-tensioned and/or stressed tensile elements
CN104126045A (en) * 2012-02-21 2014-10-29 Sika技术股份公司 Device for introducing a force into tension members made of fiber-reinforced flat-strip plastic lamellas
WO2014095330A1 (en) 2012-12-18 2014-06-26 Wobben Properties Gmbh Anchor, tensioning device, wind turbine and method for putting tensile element strands under tensile stress on an anchor
AU2013361923B2 (en) * 2012-12-18 2017-02-02 Wobben Properties Gmbh Anchor, tensioning device, wind turbine and method for putting tensile element strands under tensile stress on an anchor
AU2013361923C1 (en) * 2012-12-18 2017-05-11 Wobben Properties Gmbh Anchor, tensioning device, wind turbine and method for putting tensile element strands under tensile stress on an anchor
US9677275B2 (en) 2012-12-18 2017-06-13 Wobben Properties Gmbh Anchor, tensioning device, wind energy plant and method for tensioning tensile cords on an anchor
RU2632610C2 (en) * 2012-12-18 2017-10-06 Воббен Пропертиз Гмбх Anchor, tensioning device, wind power plant and method of tensioning stretch cords on anchor
KR101814886B1 (en) 2012-12-18 2018-01-04 보벤 프로퍼티즈 게엠베하 Anchor, tensioning device, wind turbine and method for putting tensile element strands under tensile stress on an anchor

Also Published As

Publication number Publication date
JPS61211555A (en) 1986-09-19
EP0197912B1 (en) 1990-04-11
AT390100B (en) 1990-03-12
JPH0325665B2 (en) 1991-04-08
DE3670331D1 (en) 1990-05-17
ATA64685A (en) 1989-08-15
EP0197912A3 (en) 1987-05-27
US4744691A (en) 1988-05-17

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