EP0338924A1 - Cable anchoring devices - Google Patents

Cable anchoring devices Download PDF

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Publication number
EP0338924A1
EP0338924A1 EP89401091A EP89401091A EP0338924A1 EP 0338924 A1 EP0338924 A1 EP 0338924A1 EP 89401091 A EP89401091 A EP 89401091A EP 89401091 A EP89401091 A EP 89401091A EP 0338924 A1 EP0338924 A1 EP 0338924A1
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EP
European Patent Office
Prior art keywords
cable
section
shaped
flanges
edges
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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
EP89401091A
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German (de)
French (fr)
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EP0338924B1 (en
Inventor
Pierre Jartoux
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Freyssinet International STUP SA
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Freyssinet International STUP SA
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Priority to AT89401091T priority Critical patent/ATE76144T1/en
Publication of EP0338924A1 publication Critical patent/EP0338924A1/en
Application granted granted Critical
Publication of EP0338924B1 publication Critical patent/EP0338924B1/en
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    • 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

Definitions

  • the invention relates to devices for anchoring stretched cables of generally cylindrical outline on solid masses, generally made of concrete, through which these cables pass.
  • each section of cable 2 i --the index i designating the rank of the section or span considered-- must be tensioned after construction of the span 1 i which it crosses and which it is intended to reinforce, and this tension must be maintained using an anchoring device A bearing against this span and clamping the outgoing end of the section.
  • the portion of the cable, which is then external to the portion of the built structure, is still relatively long and generally wound in a coil 3, so that its end is inaccessible.
  • the anchoring devices according to the invention make it possible to obtain the result indicated above by their mounting "astride” on the sections of cable to be anchored.
  • a frustoconical housing for a split frustoconical jaw capable of surrounding and tightening a section of the cable to be anchored and they are essentially characterized in that they comprise a U-shaped body suitable for overlap said section, body whose wings are extended by edges directed towards one another, and a pin suitable for being housed in the U-shaped opening of said body so as to bear against the edges of its wings, l 'the whole body and ankle being drawn so as to define the frustoconical housing.
  • an anchoring device To implement such an anchoring device, it is placed around the section of cable exiting the structure, - that is to say in the immediate vicinity of this structure so as to bear axially against it -
  • the desired anchoring then being carried out by tightening the jaw radially around the cable section by axial biasing of this jaw in the direction of the structure, the narrowed portion of said jaw being arranged axially on the side of this structure.
  • the U-shaped body is extended at one of its axial ends by a transverse base split at right angles to the U-shaped opening of said body and ribs are interposed between this body and the base so as to oppose any enlargement of said U-shaped opening
  • - the mutual bearing faces of the ankle and the edges of the wings of the U-shaped body extend along a surface shaped so that the overall pressure exerted by the ankle on each edge does not stress the edges at the mutual spacing
  • the shape of the bearing faces according to the preceding paragraph is such that the overall pressure exerted by the pin on each edge tends to bring the two edges together.
  • the invention includes, apart from these main provisions, certain other provisions which are preferably used at the same time and which will be more explicitly discussed below.
  • FIGS. 4 and 5 show respectively in end view and in axial section along V-V, Figure 4, an anchoring device established in accordance with the invention.
  • this anchoring device is arranged so that it can be mounted astride a common portion of a prestressing cable, in order to surround and tighten this portion, which constitutes one end of a stretched section of said cable or is intended to later constitute such an end.
  • This device includes: a rigid body 8 in a U suitable for radially overlapping the section of cable 2 i or 6 to be anchored, the two wings of this U being extended by flanges 9 oriented towards one another, - And a pin 12 suitable for being housed in the opening of the U formed by the body 8 by bearing against the internal faces of the flanges 9.
  • the body 8 is extended by a transverse base 10 for pressure distribution split at the right of the opening of said body and it is reinforced by ribs 11 connecting the base to the body.
  • two of the ribs 11 bear respectively on the roots of the flanges 9 so as to oppose their mutual spacing.
  • the body 8 and the pin 12 are designed so as to define together a frustoconical internal housing 13 for a split frustoconical jaw 14, the small diameter end of this housing being located on the side of the base 10.
  • each of these faces generally extends along a cylindrical surface whose generatrices are parallel to the axis of the section to be anchored and whose directrix is: - either a line segment perpendicular to the median plane M of the U defined by the body 8, - Or a section inclined on the straight line above, as visible in FIG. 4, that is to say drawn so that the resultant R of the clamping pressure exerted on said section, resultant oriented perpendicularly to this section towards the corresponding rim 9, is directed towards the plane M which has just been defined and not in the opposite direction.
  • the jaw 14 is composed in a manner known per se three identical keys together defining a cylindrical internal face suitable for contiguously surrounding the section of cable to be anchored.
  • An anchoring device is then placed without its ankle straddling the portion of the section to be anchored, just protruding axially outside the sole 15, and the base 10 of this device is applied against this sole.
  • this jaw 14 are chosen such that its large base projects axially out of said housing at the end of its introduction.
  • a thrust device arranged so as to be able to overlap the strand, of the cable in question, leaving the structure.
  • such a thrust device bears axially in two opposite directions respectively on the cable 2 and on the structure 1 armed by this cable, by means of the jaw 14 and of the body-ankle assembly 8-12, and said device comprises for example two parallel jacks arranged on either side of said cable, jacks joined together by split frames overlapping the cable.
  • the pushing device bears in two opposite directions on the two faces in manhole, of the hopper, which are crossed by the tensioned cable to cut or more precisely on the jaws 14 of two anchoring devices mounted in the immediate vicinity of these two faces, and this device advantageously comprises a play of at least two corners able to slide transversely against each other and split so as to overlap the section 6, their mutual transverse movements being controlled by an appropriate jack.
  • This device has a certain number of advantages compared to those previously known and in particular that of being able to be very easily mounted astride a section of cable to be anchored whose free end is not accessible for the threading of an annular piece.
  • the proposed anchoring devices can be recovered as and when the advancement of the fact that successive tensioning of the contiguous strands 2 i of the cable 2 results in equalization of tensions on either side of the anchoring devices previously put in place, which makes it possible to loosen the jaws 14 correspondents: it is then enough to release these jaws axially, then the pin 12 - if, as it is supposed, the space available is sufficient for this purpose - to make possible the radial release of the body 8.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Piles And Underground Anchors (AREA)
  • Ropes Or Cables (AREA)
  • Suspension Of Electric Lines Or Cables (AREA)
  • Installation Of Indoor Wiring (AREA)
  • Communication Cables (AREA)
  • Cable Accessories (AREA)
  • Reinforcement Elements For Buildings (AREA)
  • Bridges Or Land Bridges (AREA)
  • Electric Cable Installation (AREA)

Abstract

A device for anchoring a cable (2, 4) stretched over a bearing surface traversed by this cable comprises a U-shaped body (8) suitable for covering a section of the cable, a body whose flanges are extended by edges (9) directed towards each other, and a peg (12) suitable for being housed in the U-shaped opening of the said body so as to bear against the edges of its flanges, the combination of the body and the peg being designed in such a way as to define a frustoconical housing for a split frustoconical clamping jaw (14), known per se, suitable for clamping the abovementioned section. <IMAGE>

Description

L'invention est relative aux dispositifs pour ancrer des câbles tendus de contour général cylindrique sur des massifs, généralement en béton, traversés par ces câbles.The invention relates to devices for anchoring stretched cables of generally cylindrical outline on solid masses, generally made of concrete, through which these cables pass.

Elle a pour but, surtout, de rendre ces dispo­sitifs tels qu'ils puissent être utilisés même avec des câbles dont le tronçon sortant du massif et saisi pour l'ancrage ne présente pas d'extrémité libre se prêtant à un enfilage axial simple d'éléments d'ancrage annulaires sur lui.It aims, above all, to make these devices such that they can be used even with cables, the section of which comes out of the block and gripped for anchoring does not have a free end suitable for simple axial threading of annular anchors on it.

C'est par exemple le cas dans les constructions à l'avancement d'ouvrages précontraints schématisés en 1 sur la figure 1, ouvrages qui sont formés d'une plurali­té de travées 1₁,1₂,... fabriquées successivement de proche en proche et armées respectivement par divers tronçons successifs 2₁,2₂,... d'un même câble de précon­trainte continu 2 : chaque tronçon de câble 2i --l'in­dice i désignant le rang du tronçon ou de la travée con­sidérée-- doit être tendu après construction de la tra­vée 1i qu'il traverse et qu'il est destiné à renforcer, et cette tension doit être maintenue à l'aide d'un dis­positif d'ancrage A prenant appui contre cette travée et serrant l'extrémité sortante du tronçon. Or la portion, du câble, qui est alors extérieure à la portion d'ou­vrage construite, est encore relativement longue et gé­néralement enroulée en une bobine 3, de sorte que son extrémité est inaccessible.This is for example the case in constructions with the advancement of prestressed structures shown diagrammatically at 1 in FIG. 1, structures which are formed from a plurality of spans 1₁, 1₂, ... produced successively step by step and armed respectively by various successive sections 2₁, 2₂, ... of the same continuous prestressing cable 2: each section of cable 2 i --the index i designating the rank of the section or span considered-- must be tensioned after construction of the span 1 i which it crosses and which it is intended to reinforce, and this tension must be maintained using an anchoring device A bearing against this span and clamping the outgoing end of the section. However, the portion of the cable, which is then external to the portion of the built structure, is still relatively long and generally wound in a coil 3, so that its end is inaccessible.

C'est également le cas pour l'établissement d'une ouverture ou trémie T --visible respectivement en plan sur la figure 2 et en coupe verticale partielle sur la figure 3-- dans une dalle en béton D armée par des câbles de précontrainte 4 d'un type non-adhérent, c'est-­à-dire logés avec interposition de graisse dans des gai­nes 5, dans le but par exemple d'installer dans une telle ouverture une cage d'ascenseur ou d'escalier : les portions 6, de ces câbles 4, qui traversent l'ouverture T doivent pouvoir être supprimées sans pour autant que leurs portions 7 demeurant à l'intérieur de la dalle soient dégagées hors de cette dalle ni même détendues au risque d'affaiblir ladite dalle.This is also the case for the establishment of an opening or hopper T - visible respectively in plan in Figure 2 and in partial vertical section in Figure 3 - in a concrete slab D reinforced by prestressing cables 4 of a non-adherent type, that is to say housed with interposition of grease in sheaths 5, in order for example to install in a such an opening an elevator or staircase: the portions 6 of these cables 4 which pass through the opening T must be able to be removed without their portions 7 remaining inside the slab being released from this slab or even relaxed at the risk of weakening said slab.

Les dispositifs d'ancrage selon l'invention per­mettent d'obtenir le résultat indiqué ci-dessus par leur montage "à cheval" sur les tronçons de câble à ancrer.The anchoring devices according to the invention make it possible to obtain the result indicated above by their mounting "astride" on the sections of cable to be anchored.

A cet effet ils présentent, d'une façon connue en soi, un logement tronconique pour un mors tronconique fendu propre à entourer et serrer un tronçon du câble à ancrer et ils sont essentiellement caractérisés en ce qu'ils comprennent un corps en U propre à chevaucher le­dit tronçon, corps dont les ailes sont prolongées par des rebords dirigés l'un vers l'autre, et une cheville propre à être logée dans l'ouverture en U dudit corps de façon à prendre appui contre les rebords de ses ailes, l'ensemble du corps et de la cheville étant dessiné de façon à définir le logement tronconique.For this purpose, they present, in a manner known per se, a frustoconical housing for a split frustoconical jaw capable of surrounding and tightening a section of the cable to be anchored and they are essentially characterized in that they comprise a U-shaped body suitable for overlap said section, body whose wings are extended by edges directed towards one another, and a pin suitable for being housed in the U-shaped opening of said body so as to bear against the edges of its wings, l 'the whole body and ankle being drawn so as to define the frustoconical housing.

Pour mettre en oeuvre un tel dispositif d'ancra­ge, on le met en place autour du tronçon de câble sor­tant de l'ouvrage, -- c'est-à-dire à proximité immédiate de cet ouvrage de façon à prendre appui axialement con­tre lui--, par un chevauchement radial dudit tronçon par le corps en U suivi des introductions axiales de la che­ville et du mors, l'ancrage désiré étant ensuite réalisé en serrant radialement le mors autour du tronçon de câ­ble par sollicitation axiale de ce mors en direction de l'ouvrage, la portion rétrécie dudit mors étant disposée axialement du côté de cet ouvrage.To implement such an anchoring device, it is placed around the section of cable exiting the structure, - that is to say in the immediate vicinity of this structure so as to bear axially against it - By a radial overlap of said section by the U-shaped body followed by the axial introductions of the dowel and the jaw, the desired anchoring then being carried out by tightening the jaw radially around the cable section by axial biasing of this jaw in the direction of the structure, the narrowed portion of said jaw being arranged axially on the side of this structure.

Dans des modes de réalisation préférés, on a re­cours en outre à l'une et/ou à l'autre des dispositions suivantes :
- le corps en U est prolongé à l'une de ses extrémités axiales par un socle transversal fendu au droit de l'ouverture en U dudit corps et des nervures sont interposées entre ce corps et le socle de façon à s'opposer à tout élargissement de ladite ouverture en U,
- les faces d'appui mutuelles de la cheville et des re­bords des ailes du corps en U s'étendent selon une surface conformée de façon telle que la pression glo­bale exercée par la cheville sur chaque rebord ne sol­licite pas les rebords à l'écartement mutuel,
- la forme des faces d'appui selon l'alinéa précédent est telle que la pression globale exercée par la che­ville sur chaque rebord tende à rapprocher mutuelle­ment les deux rebords.In preferred embodiments, use is also made of one and / or the other of the following arrangements:
- the U-shaped body is extended at one of its axial ends by a transverse base split at right angles to the U-shaped opening of said body and ribs are interposed between this body and the base so as to oppose any enlargement of said U-shaped opening,
- the mutual bearing faces of the ankle and the edges of the wings of the U-shaped body extend along a surface shaped so that the overall pressure exerted by the ankle on each edge does not stress the edges at the mutual spacing ,
- The shape of the bearing faces according to the preceding paragraph is such that the overall pressure exerted by the pin on each edge tends to bring the two edges together.

L'invention comprend, mises à part ces disposi­tions principales, certaines autres dispositions qui s'utilisent de préférence en même temps et dont il sera plus explicitement question ci-après.The invention includes, apart from these main provisions, certain other provisions which are preferably used at the same time and which will be more explicitly discussed below.

Dans ce qui suit, l'on va décrire un mode de réalisation préféré de l'invention en se référant aux figures 4 et 5 d'une manière bien entendu non limitati­ve.In what follows, a preferred embodiment of the invention will be described with reference to FIGS. 4 and 5 in a non-limiting manner, of course.

Ces figures 4 et 5 montrent respectivement en vue en bout et en coupe axiale selon V-V, figure 4, un dispositif d'ancrage établi conformément à l'invention.These Figures 4 and 5 show respectively in end view and in axial section along V-V, Figure 4, an anchoring device established in accordance with the invention.

D'une façon générale, ce dispositif d'ancrage est agencé de façon à pouvoir être monté à cheval sur une portion courante d'un câble de précontrainte, en vue d'entourer et de serrer fortement cette portion, laquel­le constitue une extrémité d'un tronçon tendu dudit câ­ble ou est destinée à constituer ultérieurement une telle extrémité.In general, this anchoring device is arranged so that it can be mounted astride a common portion of a prestressing cable, in order to surround and tighten this portion, which constitutes one end of a stretched section of said cable or is intended to later constitute such an end.

Ce dispositif comprend :
- un corps rigide 8 en U propre à chevaucher radialement le tronçon de câble 2i ou 6 à ancrer, les deux ailes de cet U étant prolongées par des rebords 9 orientés l'un vers l'autre,
- et une cheville 12 propre à être logée dans l'ouvertu­re de l'U formé par le corps 8 en prenant appui contre les faces internes des rebords 9.This device includes:
a rigid body 8 in a U suitable for radially overlapping the section of cable 2 i or 6 to be anchored, the two wings of this U being extended by flanges 9 oriented towards one another,
- And a pin 12 suitable for being housed in the opening of the U formed by the body 8 by bearing against the internal faces of the flanges 9.

Le corps 8 est prolongé par un socle transversal 10 de répartition de pression fendu au droit de l'ouver­ture dudit corps et il est renforcé par des nervures 11 reliant le socle au corps.The body 8 is extended by a transverse base 10 for pressure distribution split at the right of the opening of said body and it is reinforced by ribs 11 connecting the base to the body.

Comme visible sur la figure 4, deux des nervures 11 prennent appui respectivement sur les racines des rebords 9 de façon à s'opposer à leur écartement mutuel.As visible in FIG. 4, two of the ribs 11 bear respectively on the roots of the flanges 9 so as to oppose their mutual spacing.

Le corps 8 et la cheville 12 sont dessinés de façon à définir ensemble un logement interne tronconique 13 pour un mors tronconique fendu 14, l'extrémité de pe­tit diamètre de ce logement se trouvant du côté du socle 10.The body 8 and the pin 12 are designed so as to define together a frustoconical internal housing 13 for a split frustoconical jaw 14, the small diameter end of this housing being located on the side of the base 10.

En outre, les faces d'appui mutuelles de la che­ville 12 contre les rebords 9 sont dessinées de façon telle que la pression globale exercée par la cheville sur chaque rebord, lors du serrage du câble par le mors, n'ait pas tendance à écarter ces rebords l'un de l'au­tre.In addition, the mutual bearing faces of the dowel 12 against the flanges 9 are drawn so that the overall pressure exerted by the dowel on each flange, when the cable is clamped by the jaw, does not tend to spread these edges from each other.

A cet effet, chacune de ces faces s'étend géné­ralement selon une surface cylindrique dont les généra­trices sont parallèles à l'axe du tronçon à ancrer et dont la directrice est :
- soit un segment de droite perpendiculaire au plan mé­dian M de l'U défini par le corps 8,
- soit un tronçon incliné sur le segment de droite ci-­dessus, ainsi que visible sur la figure 4, c'est-à-­dire dessiné de façon telle que la résultante R de la pression de serrage exercée sur ledit tronçon, résul­tante orientée perpendiculairement à ce tronçon vers le rebord 9 correspondant, soit dirigée vers le plan M qui vient d'être défini et non pas dans le sens oppo­sé.To this end, each of these faces generally extends along a cylindrical surface whose generatrices are parallel to the axis of the section to be anchored and whose directrix is:
- either a line segment perpendicular to the median plane M of the U defined by the body 8,
- Or a section inclined on the straight line above, as visible in FIG. 4, that is to say drawn so that the resultant R of the clamping pressure exerted on said section, resultant oriented perpendicularly to this section towards the corresponding rim 9, is directed towards the plane M which has just been defined and not in the opposite direction.

Le mors 14 est composé d'une façon connue en soi de trois clavettes identiques définissant ensemble une face interne cylindrique propre à entourer jointivement le tronçon de câble à ancrer.The jaw 14 is composed in a manner known per se three identical keys together defining a cylindrical internal face suitable for contiguously surrounding the section of cable to be anchored.

La mise en oeuvre de ce dispositif d'ancrage est la suivante.The implementation of this anchoring device is as follows.

On commence par dénuder de sa gaine 5 le tronçon (2,4) à ancrer, si celui-ci était initialement gainé, après quoi l'on dégraisse le tronçon ainsi dénudé si né­cessaire.We start by stripping from its sheath 5 the section (2,4) to be anchored, if the latter was initially sheathed, after which the section thus stripped is degreased if necessary.

Puis on rapporte une semelle 15 en béton de ca­lage et d'étanchéité sur la face externe de l'ouvrage (1,D) qui est traversée par le tronçon à ancrer et qui est destinée à servir de portée d'ancrage.Then a concrete sole 15 is fitted and sealed on the external face of the structure (1, D) which is crossed by the section to be anchored and which is intended to serve as an anchoring surface.

On place ensuite un dispositif d'ancrage sans sa cheville à cheval sur la portion, du tronçon à ancrer, faisant juste saillie axialement en dehors de la semelle 15, et l'on applique le socle 10 de ce dispositif contre cette semelle.An anchoring device is then placed without its ankle straddling the portion of the section to be anchored, just protruding axially outside the sole 15, and the base 10 of this device is applied against this sole.

On introduit ensuite axialement :
- la cheville 12 entre le tronçon de câble chevauché par le dispositif d'ancrage et les rebords 9 de ce dispo­sitif,
- puis les clavettes constitutives du mors fendu 14 dans le logement annulaire formé entre le tronçon de câble et les faces tronconiques en regard du dispositif d'ancrage de façon telle que ledit mors 14 entoure ledit tronçon.Then, axially:
the pin 12 between the section of cable overlapped by the anchoring device and the flanges 9 of this device,
- Then the keys constituting the split jaw 14 in the annular housing formed between the cable section and the frustoconical faces opposite the anchoring device so that said jaw 14 surrounds said section.

Les dimensions de ce mors 14 sont choisies tel­les que sa grande base déborde axialement hors dudit logement à la fin de son introduction.The dimensions of this jaw 14 are chosen such that its large base projects axially out of said housing at the end of its introduction.

Il suffit alors d'appliquer contre cette grande base une poussée axiale P pour assurer l'ancrage désiré.It then suffices to apply an axial thrust P against this large base to ensure the desired anchoring.

On fait appel à cet effet à un appareil de pous­sée agencé de façon à pouvoir chevaucher le brin, du câble considéré, sortant de l'ouvrage.For this purpose, use is made of a thrust device arranged so as to be able to overlap the strand, of the cable in question, leaving the structure.

Selon un mode de réalisation applicable aux constructions à l'avancement qui ont été schématisées sur la figure 1, un tel appareil de poussée prend appui axialement selon deux sens opposés respectivement sur le câble 2 et sur l'ouvrage 1 armé par ce câble, par l'in­termédiaire du mors 14 et de l'ensemble corps-cheville 8-12, et ledit appareil comprend par exemple deux vérins parallèles disposés de part et d'autre dudit câble, vé­rins réunis entre eux par des armatures fendues chevau­chant le câble.According to an embodiment applicable to constructions in progress which have been shown diagrammatically in FIG. 1, such a thrust device bears axially in two opposite directions respectively on the cable 2 and on the structure 1 armed by this cable, by means of the jaw 14 and of the body-ankle assembly 8-12, and said device comprises for example two parallel jacks arranged on either side of said cable, jacks joined together by split frames overlapping the cable.

Selon un autre mode de réalisation applicable à la suppression d'un tronçon de câble tendu 6 traversant une trémie T, telle qu'illustrée sur les figures 2 et 3, l'appareil de poussée prend appui selon deux sens oppo­sés sur les deux faces en regard, de la trémie, qui sont traversées par le câble tendu à couper ou plus précisé­ment sur les mors 14 de deux dispositifs d'ancrage mon­tés à proximité immédiate de ces deux faces, et cet appareil comprend avantageusement un jeu d'au moins deux coins propres à glisser transversalement l'un contre l'autre et fendus de façon à chevaucher le tronçon 6, leurs déplacements transversaux mutuels étant commandés par un vérin approprié.According to another embodiment applicable to the removal of a stretch of stretched cable 6 passing through a hopper T, as illustrated in FIGS. 2 and 3, the pushing device bears in two opposite directions on the two faces in manhole, of the hopper, which are crossed by the tensioned cable to cut or more precisely on the jaws 14 of two anchoring devices mounted in the immediate vicinity of these two faces, and this device advantageously comprises a play of at least two corners able to slide transversely against each other and split so as to overlap the section 6, their mutual transverse movements being controlled by an appropriate jack.

En suite de quoi, et quel que soit le mode de réalisation adopté, on obtient finalement un dispositif d'ancrage de câble dont la constitution et la mise en oeuvre résultent suffisamment de ce qui précède.As a result of this, and whatever the embodiment adopted, a cable anchoring device is finally obtained, the constitution and implementation of which result sufficiently from the above.

Ce dispositif présente un certain nombre d'avan­tages par rapport à ceux antérieurement connus et en particulier celui de pouvoir être très facilement monté à cheval sur un tronçon de câble à ancrer dont l'extré­mité libre n'est pas accessible pour l'enfilage d'une pièce annulaire.This device has a certain number of advantages compared to those previously known and in particular that of being able to be very easily mounted astride a section of cable to be anchored whose free end is not accessible for the threading of an annular piece.

On peut noter également que, dans le cas des constructions à l'avancement, les dispositifs d'ancrage proposés peuvent être récupérés au fur et à mesure de l'avancement du fait que les mises sous tension succes­sives des brins contigus 2i du câble 2 se traduisent par des égalisations de tensions de part et d'autre des dis­positifs d'ancrage précédemment mis en place, ce qui rend possible le desserrage des mors 14 correspondants : il suffit alors de dégager axialement ces mors, puis la cheville 12 --si, comme il est supposé, la place dispo­nible est suffisante à cet effet-- pour rendre possible le dégagement radial du corps 8.It can also be noted that, in the case of constructions during advancement, the proposed anchoring devices can be recovered as and when the advancement of the fact that successive tensioning of the contiguous strands 2 i of the cable 2 results in equalization of tensions on either side of the anchoring devices previously put in place, which makes it possible to loosen the jaws 14 correspondents: it is then enough to release these jaws axially, then the pin 12 - if, as it is supposed, the space available is sufficient for this purpose - to make possible the radial release of the body 8.

Comme il va de soi, et comme il résulte d'ail­leurs déjà de ce qui précède, l'invention ne se limite nullement à ceux de ses modes d'application et de réali­sation qui ont été plus spécialement envisagés ; elle en embrasse, au contraire, toutes les variantes.As is obvious, and as already follows from the foregoing, the invention is in no way limited to those of its modes of application and embodiments which have been more especially envisaged; on the contrary, it embraces all its variants.

Claims (4)

1. Dispositif pour ancrer un câble tendu (2,4) de contour général cylindrique sur une portée (1,D) tra­versée par ce câble, présentant un logement tronconique pour un mors tronconique fendu (14) propre à entourer et serrer un tronçon dudit câble, caractérisé en ce qu'il comprend un corps en U (8) propre à chevaucher ledit tronçon, corps dont les ailes sont prolongées par des rebords (9) dirigés l'un vers l'autre, et une cheville (12) propre à être logée dans l'ouverture en U dudit corps de façon à prendre appui contre les rebords de ses ailes, l'ensemble du corps et de la cheville étant des­siné de façon à définir le logement tronconique.1. Device for anchoring a tensioned cable (2,4) of cylindrical general contour on a span (1, D) crossed by this cable, having a frustoconical housing for a split frustoconical jaw (14) suitable for surrounding and tightening a section of said cable, characterized in that it comprises a U-shaped body (8) capable of overlapping said section, body the wings of which are extended by flanges (9) directed towards each other, and a clean dowel (12) to be housed in the U-shaped opening of said body so as to bear against the edges of its wings, the entire body and the ankle being drawn so as to define the frustoconical housing. 2. Dispositif d'ancrage selon la revendication 1, caractérisé en ce que le corps en U (8) est prolongé à l'une de ses extrémités axiales par un socle trans­versal (10) fendu au droit de l'ouverture en U dudit corps et en ce que des nervures (11) sont interposées entre ce corps et le socle de façon à s'opposer à tout élargissement de ladite ouverture en U.2. Anchoring device according to claim 1, characterized in that the U-shaped body (8) is extended at one of its axial ends by a transverse base (10) split at right angles to the U-shaped opening of said body and in that ribs (11) are interposed between this body and the base so as to oppose any enlargement of said U-shaped opening. 3. Dispositif d'ancrage selon l'une quelconque des revendications 1 et 2, caractérisé en ce que les faces d'appui mutuelles de la cheville (12) et des re­bords (9) des ailes du corps en U (8) s'étendent selon une surface conformée de façon telle que la pression globale exercée par la cheville sur chaque rebord ne sollicite pas les rebords à l'écartement mutuel.3. An anchoring device according to any one of claims 1 and 2, characterized in that the mutual bearing faces of the pin (12) and the flanges (9) of the wings of the U-shaped body (8) s' extend along a surface shaped in such a way that the overall pressure exerted by the pin on each edge does not stress the edges at mutual spacing. 4. Dispositif d'ancrage selon la revendication 3, caractérisé en ce que la forme de chacune des faces d'appui réalisées entre la cheville (12) et les rebords (9) est telle que la pression globale exercée par la cheville sur chaque rebord tende à rapprocher mutuelle­ment les deux rebords.4. An anchoring device according to claim 3, characterized in that the shape of each of the bearing faces produced between the dowel (12) and the flanges (9) is such that the overall pressure exerted by the dowel on each flange tends to bring the two edges together.
EP89401091A 1988-04-20 1989-04-19 Cable anchoring devices Expired - Lifetime EP0338924B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89401091T ATE76144T1 (en) 1988-04-20 1989-04-19 ANCHORING DEVICES FOR CABLES.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8805225A FR2630481B1 (en) 1988-04-20 1988-04-20 IMPROVEMENTS ON CABLE ANCHORING DEVICES
FR8805225 1988-04-20

Publications (2)

Publication Number Publication Date
EP0338924A1 true EP0338924A1 (en) 1989-10-25
EP0338924B1 EP0338924B1 (en) 1992-05-13

Family

ID=9365486

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89401091A Expired - Lifetime EP0338924B1 (en) 1988-04-20 1989-04-19 Cable anchoring devices

Country Status (7)

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US (1) US4976078A (en)
EP (1) EP0338924B1 (en)
AT (1) ATE76144T1 (en)
DE (1) DE68901489D1 (en)
ES (1) ES2030984T3 (en)
FR (1) FR2630481B1 (en)
GR (1) GR3004675T3 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE69210396T2 (en) * 1992-06-24 1996-11-28 Molex Inc Modular electrical connector

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE801407C (en) * 1948-10-02 1951-01-04 Deutsche Bundesbahn Anchoring structure of pre-stressed steel inserts in prestressed concrete bodies
GB1142103A (en) * 1966-07-02 1969-02-05 Held & Franke Bauag Improvements in and relating to couplings for tensile members in prestressed concrete units
US4480369A (en) * 1982-02-22 1984-11-06 Sanders Nicholas A Gripping tool

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2245316A (en) * 1938-08-31 1941-06-10 Alfred J Amsler Clamping chuck
US2217560A (en) * 1939-08-07 1940-10-08 Joseph H M Michon Adjusting mechanism for piercing punches
US2804674A (en) * 1952-06-16 1957-09-03 Long Construction Company Double head reinforcing rod for pre-stress concrete
US2834081A (en) * 1955-08-26 1958-05-13 Jr Charles W Stump Rod fastener
US3405490A (en) * 1967-01-10 1968-10-15 Robert R. La Marr Anchor structure for posttensioned tendons
SU697667A1 (en) * 1978-05-26 1979-11-15 Научно-Исследовательский Институт Бетона И Железобетона Госстроя Ссср Gripper for tensioning reinforcing members

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE801407C (en) * 1948-10-02 1951-01-04 Deutsche Bundesbahn Anchoring structure of pre-stressed steel inserts in prestressed concrete bodies
GB1142103A (en) * 1966-07-02 1969-02-05 Held & Franke Bauag Improvements in and relating to couplings for tensile members in prestressed concrete units
US4480369A (en) * 1982-02-22 1984-11-06 Sanders Nicholas A Gripping tool

Also Published As

Publication number Publication date
US4976078A (en) 1990-12-11
FR2630481A1 (en) 1989-10-27
EP0338924B1 (en) 1992-05-13
FR2630481B1 (en) 1992-04-24
DE68901489D1 (en) 1992-06-17
ATE76144T1 (en) 1992-05-15
GR3004675T3 (en) 1993-04-28
ES2030984T3 (en) 1992-11-16

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