WO2000056994A1 - Device for fixing a structural cable to a building element - Google Patents

Device for fixing a structural cable to a building element Download PDF

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Publication number
WO2000056994A1
WO2000056994A1 PCT/FR2000/000704 FR0000704W WO0056994A1 WO 2000056994 A1 WO2000056994 A1 WO 2000056994A1 FR 0000704 W FR0000704 W FR 0000704W WO 0056994 A1 WO0056994 A1 WO 0056994A1
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WO
WIPO (PCT)
Prior art keywords
yoke
head
cable
block
chamber
Prior art date
Application number
PCT/FR2000/000704
Other languages
French (fr)
Inventor
Jérôme Stubler
Ivica Zivanovic
Vincent Morisseau
Patrick Ladret
Original Assignee
Freyssinet International (Stup)
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Freyssinet International (Stup) filed Critical Freyssinet International (Stup)
Priority to AU33022/00A priority Critical patent/AU3302200A/en
Priority to MXPA01006115A priority patent/MXPA01006115A/en
Publication of WO2000056994A1 publication Critical patent/WO2000056994A1/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
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D19/00—Structural or constructional details of bridges
    • E01D19/14—Towers; Anchors ; Connection of cables to bridge parts; Saddle supports

Definitions

  • the present invention relates to the field of the use of cables in construction works. It finds an application whenever it is necessary to fix to a structural element a cable subjected to tensile forces.
  • structural cable as used here also covers a bundle or group of individual cables substantially parallel to each other, each individual cable may itself be composed of one or more elementary strands.
  • An important field of application of the invention is that of the shrouds used to support the decks of the cable-stayed bridges.
  • Such a guy consists of a bundle of parallel strands anchored at their two ends by means of anchoring blocks.
  • the anchoring block has, for each strand, a through hole in which the strand is wedged by means of a frustoconical jaw.
  • the bridge deck is made of concrete, and the anchoring block bears against a plate located at the lower mouth of a shuttering tube passing through the concrete deck.
  • the shroud is threaded through this shuttering tube to reach the anchor block.
  • a guide tube containing a deflector allowing on the one hand to obtain a slight divergence of the strands so that they have at the level of the block a mutual spacing sufficient to carry out the anchoring, and d 'on the other hand to resume deflection efforts to which the shroud can be subjected.
  • another protective tube provides the connection with the main shroud sheath.
  • the anchoring block is retained in a yoke connected to the structure by means of a hinge.
  • the screed must have a configuration giving access to the anchoring block so that the individual anchoring of the strands can be carried out and the means protecting the anchoring zone against corrosion put in place.
  • the anchor block is housed between the sides of the yoke, and its front face is in abutment against a head of the yoke crossed by the strands. To accommodate the block, the space between the sides of the yoke must have a sufficient length and width, so that the yoke has a relatively large size and thickness.
  • An object of the present invention is to simplify and lighten the fixing of the cable to the structure.
  • the invention thus provides a device for fixing a structural cable to a construction element, comprising an anchoring block provided with means for wedging the strands constituting the cable, and a yoke articulated on the structural element and having in direction of the cable, a head crossed by an orifice in which the cable is engaged, the yoke having a configuration suitable for retaining the anchoring block when traction is exerted on the cable.
  • the anchoring block is at least partially engaged in the orifice passing through the clevis head, which orifice has a thread receiving a complementary thread formed on the periphery of the anchoring block and / or on a stop to retain the anchor block.
  • the screwing of the anchor block, or of the abutment member, in the yoke head makes it possible to reduce the dimensions of the yoke, in particular in length and in thickness thanks in particular to better transmission of the forces between the cable and the building element. This results in particular in the use of more compact parts making it possible to obtain a better effect of continuity between the cable and its means of connection to the structure.
  • the yoke has two sides extending from the head to an opposite end of the yoke where they are crossed by an axis of articulation on the structural element, access to a rear side of the anchoring block, transverse to the direction of the articulation axis, being left between the sides of the yoke; - a cable protection tube is connected to the head of the yoke;
  • a seal providing an elastic connection is interposed between the protective tube according to the preceding paragraph and the yoke head, in order to center the protective tube on the yoke head;
  • the cable is made up of strands each protected by an individual plastic sheath which is interrupted in a chamber formed at the front of the anchoring block and crossed by the strands, so that the strands are wedged in the anchoring block in a portion where they are devoid of sheath, the chamber being filled with a protective material, and at least part of the wall of the chamber is integral with a part screwed into the internal thread formed in the head of the yoke, said part being able to form a stop member against which the anchoring block is applied;
  • a sealing system of the cable gland type comprising at least two rigid plates traversed by the strands, at least one elastic cushion placed between two of the plates and means of clamping of the cushion between the plates;
  • the clamping means according to the preceding paragraph comprise a piston bearing against the outer plate of the sealing system and connected to a thread engaged on the tapping formed in the head of the yoke;
  • the chamber according to any one of the three preceding paragraphs extends at least partially inside the head of the yoke
  • the chamber according to any one of the four preceding paragraphs communicates with another chamber situated on the rear side of the anchoring block, filled with the same protective material and closed by a cover.
  • FIG. 1 is a schematic longitudinal sectional view of a fixing device according to the invention.
  • FIG. 2 is a perspective view of a yoke of the device
  • FIG. 3 is a sectional view showing an example of means for anchoring and protecting a stay in the device of Figure 1;
  • FIG. 4 is a diagram of an organ forming part of a variant of the protection means.
  • the invention is illustrated below in its application to cable-stayed bridges.
  • the device shown in the drawings is used, for example, to fix the lower end of a stay to the bridge deck.
  • the reader will appreciate that a similar device could be used at the upper end of the shroud, and more generally for fixing other types of structural cables used in construction techniques.
  • the shroud shown in FIG. 1 is composed of a bundle of substantially parallel strands 10. In the example shown, each strand is of the sheathed-greased or sheathed-waxed type.
  • a strand working in traction formed of a stranded assembly of metallic filaments, embedded in a protective material such as a grease or a wax, and contained in an individual plastic sheath such as a polyethylene with high density (HDPE).
  • a protective material such as a grease or a wax
  • the ends of the strands constituting the cable are wedged in an anchoring block 12 retained in a yoke 13.
  • the yoke 13 is shown in FIG. 2. It comprises a head 14 crossed by a tapped orifice 15 coaxial with the shroud. At its opposite end, the yoke 13 comprises two flanges 16 carried by flanks 17 extending from the head 14.
  • the yoke 13 is installed with its two flanges 16 arranged on either side of a support 18 secured to the deck ( Figure 1).
  • a horizontal hinge pin 19 passes through the flanges 16 of the yoke and the support 18 in order to articulate the yoke 13 relative to the deck.
  • the anchoring block 12 is engaged and screwed into the threaded orifice 15 present in the head 14 of the yoke. It thus has a generally cylindrical shape, the periphery of which has a thread 21 complementary to the thread present in the head 14.
  • An optional ring 27 also having a complementary thread 37 is screwed into the threaded orifice 15 at the front of the block. anchoring 12. This ring 37 contributes to retaining in place the block 12 which bears against it.
  • the block 12 is not threaded, but only the ring 27 which is then given a sufficient length for the recovery of the tensile force.
  • the sides 17 of the yoke 13 have a length and a spacing sufficient to accommodate the whole of the anchoring block and allow easy access thereto.
  • good transmission of forces in the yoke 13 allows it to be lighter in construction than in the prior devices.
  • each strand 10 is interrupted in front of the front face of the anchoring block 12.
  • the stripped end of each strand 10 passes through an orifice formed in the block 12, ending in a frustoconical mouth on the rear face of the block 12.
  • an anchoring jaw 24, of complementary frustoconical shape from that of the mouth is placed around the strand in order to wedge it in block 12.
  • the chamber 25 is delimited laterally by a cylindrical wall 26, for example welded to the threaded ring 27.
  • this sealing system comprises three rigid plates 28a, 28b, 28c, for example made of HDPE, traversed by orifices positioned to allow the sheathed strands 10 to pass, and two elastic cushions 29, for example made of foam, sandwiched between the rigid plates 28a, 28b, 28c and also crossed by the sheathed strands 10. Threaded rods 30 extend inside the chamber 25 between the anchoring block 12 and the sealing system. These rods 30 pass through the plates 28a, 28b, 28c and the cushions 29 and receive nuts 31 beyond the sealing system and / or at the rear of the block 12.
  • Spacers 32 are arranged in the chamber 25, by example around the threaded rods 30, to define the spacing between the front face of the anchoring block 12, and the innermost rigid plate 28a.
  • the tightening of the nuts 31 from the front side and / or the rear side of the device then makes it possible to compress the cushions 29 in order to seal the front of the chamber 25.
  • One or more channels, not shown, are provided in the block d anchoring 12 to communicate the chamber 25 with another chamber 34 located on the rear face of the block.
  • This chamber 34 is delimited by a cover 35 covering the rear side of the block 12 in a sealed manner.
  • the cover 35 can be bolted to the block 12 as shown, or else screwed into the threaded orifice 15 of the yoke.
  • the cover 35 carries an injection orifice 36 for the protective wax. After injection, this fills the chamber 34, the gaps left free in the anchoring block 12, as well as the chamber 25 in which the individual sheath of the strands 10 is interrupted, in order to protect the metal parts from corrosion. exposed strands.
  • the arrangement of the fixing device can also make it possible to dispense with the guide tubes and deflectors used in the usual stay cable fastenings.
  • the articulation of the yoke 13 on the deck allows to tolerate a certain movement of the stay cable.
  • the chamber 25 and the sealing system can be extended, which facilitates the overall design of the device, in particular the fact that the chamber 25 can extend, at least in part, in the threaded orifice 15 of the clevis head
  • a protective tube 40 is put in place. on the portion of the shroud emerging from the anchoring block and from the chamber 25. This tube 40 can be connected continuously to the clevis head 14, with the interposition of a seal 41 as shown in FIGS.
  • the tube 40 ensures continuity with the sheath containing the bundle of strands in the running part of the shroud II may include water drainage channels not shown II also serves to protect the strands 10 against traffic accidents and vandalism to the base of the shroud
  • the joint 41 has a toric shape with a tubular section as shown, it produces a self-centered elastic articulation between the yoke and the sheath of the shroud
  • FIG. 4 illustrates an alternative embodiment in which the clamping means used to compress the cushion or cushions 29 between the rigid plates of the sealing system comprise a piston 44 defined by an internal annular rim of a part 45 of generally cylindrical shape Towards the anchor block 12, the part 45 ends with an externally threaded portion 46, complementary to the internal thread 15 formed in the head 14 of the yoke.
  • the part 45 ends with an externally threaded portion 46, complementary to the internal thread 15 formed in the head 14 of the yoke.
  • the outer plate 28c. of the sealing system which compresses the cushions 29 for sealing if the inner plate 28a abuts against one or more spacers placed in the chamber 25.
  • One can in particular provide a cylindrical spacer placed between the bundle of strands and the part 45.
  • the part 45 or this spacer can be used laterally delimiting the chamber 25 containing the protective wax.
  • the part ends, for example, by a portion 47 internally threaded in order to be connected to the current part of the outer sheath of the stay. It is thus possible to dispense with the additional protective tube 40 of FIG. 3.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Bridges Or Land Bridges (AREA)

Abstract

The invention concerns a device comprising an anchoring block (12) provided with means binding the strands forming the cable (10), and a clevis (13) articulated on the structural element and having in the direction of the cable a head (14) run through by an orifice wherein the cable is engaged, the clevis being so designed as to maintain the anchoring block when traction is exerted on the cable. The anchoring block is at least partly engaged in the orifice (15) passing through the clevis head, which orifice has a tapping receiving a matching thread (21, 37) formed on the periphery of the anchoring block (12) and/or on a stop element (27) to retain the anchoring block.

Description

DISPOSITIF POUR FIXER UN CABLE DE STRUCTURE A UN ELEMENT DE CONSTRUCTION DEVICE FOR FIXING A STRUCTURAL CABLE TO A CONSTRUCTION ELEMENT
La présente invention concerne le domaine de l'utilisation des câbles dans les ouvrages de construction. Elle trouve une application chaque fois qu'il est nécessaire de fixer à un élément de structure un câble soumis à des efforts de traction. Le terme "câble de structure" tel qu'utilisé ici couvre également un faisceau ou groupe de câbles individuels sensiblement parallèles les uns aux autres, chaque câble individuel pouvant lui-même être composé d'un ou plusieurs brins élémentaires. Un domaine d'application important de l'invention est celui des haubans servant à soutenir les tabliers des ponts haubanés.The present invention relates to the field of the use of cables in construction works. It finds an application whenever it is necessary to fix to a structural element a cable subjected to tensile forces. The term "structural cable" as used here also covers a bundle or group of individual cables substantially parallel to each other, each individual cable may itself be composed of one or more elementary strands. An important field of application of the invention is that of the shrouds used to support the decks of the cable-stayed bridges.
Un tel hauban consiste en un faisceau de torons parallèles ancrés à leurs deux extrémités au moyen de blocs d'ancrage. En général, le bloc d'ancrage comporte, pour chaque toron, un trou traversant dans lequel le toron est coincé au moyen d'un mors tronconique.Such a guy consists of a bundle of parallel strands anchored at their two ends by means of anchoring blocks. In general, the anchoring block has, for each strand, a through hole in which the strand is wedged by means of a frustoconical jaw.
Dans une réalisation courante, le tablier du pont est en béton, et le bloc d'ancrage prend appui contre une plaque située à l'embouchure inférieure d'un tube coffrant traversant le tablier en béton. Le hauban est enfilé dans ce tube coffrant pour atteindre le bloc d'ancrage. A l'extrémité supérieure du tube coffrant est raccordé un tube guide contenant un déviateur permettant d'une part d'obtenir une légère divergence des torons pour qu'ils aient au niveau du bloc un écartement mutuel suffisant pour réaliser l'ancrage, et d'autre part de reprendre des efforts de déviation auxquels le hauban peut être soumis. Au- delà du tube guide, un autre tube protecteur assure le raccordement avec la gaine principale du hauban.In a current embodiment, the bridge deck is made of concrete, and the anchoring block bears against a plate located at the lower mouth of a shuttering tube passing through the concrete deck. The shroud is threaded through this shuttering tube to reach the anchor block. At the upper end of the shuttering tube is connected a guide tube containing a deflector allowing on the one hand to obtain a slight divergence of the strands so that they have at the level of the block a mutual spacing sufficient to carry out the anchoring, and d 'on the other hand to resume deflection efforts to which the shroud can be subjected. Beyond the guide tube, another protective tube provides the connection with the main shroud sheath.
Ce système comporte d'assez nombreuses pièces, et entraîne plusieurs changements de diamètre dans la partie apparente du hauban émergeant du tablier, ce qui n'est pas souhaitable notamment pour des raisons esthétiques. D'autre part, le tube coffrant doit être positionné avec une grande précision, ce qui complique l'exécution du tablier en béton.This system has quite a few parts, and causes several changes in diameter in the visible part of the stay emerging from the deck, which is undesirable in particular for aesthetic reasons. On the other hand, the shuttering tube must be positioned with great precision, which complicates the execution of the concrete deck.
Dans d'autres réalisations, le bloc d'ancrage est retenu dans une chape reliée à l'ouvrage au moyen d'une articulation. La chape doit avoir une configuration donnant accès au bloc d'ancrage afin qu'on puisse réaliser l'ancrage individuel des torons et mettre en place les moyens protégeant la zone d'ancrage contre la corrosion. Dans ces réalisations, le bloc d'ancrage est logé entre les flancs de la chape, et sa face avant est en butée contre une tête de la chape traversée par les torons. Pour pouvoir loger le bloc, l'espace situé entre les flancs de la chape doit avoir une longueur et une largeur suffisantes, de sorte que la chape présente un encombrement et une épaisseur relativement importants.In other embodiments, the anchoring block is retained in a yoke connected to the structure by means of a hinge. The screed must have a configuration giving access to the anchoring block so that the individual anchoring of the strands can be carried out and the means protecting the anchoring zone against corrosion put in place. In these embodiments, the anchor block is housed between the sides of the yoke, and its front face is in abutment against a head of the yoke crossed by the strands. To accommodate the block, the space between the sides of the yoke must have a sufficient length and width, so that the yoke has a relatively large size and thickness.
Un but de la présente invention est de simplifier et d'alléger la fixation du câble à l'ouvrage.An object of the present invention is to simplify and lighten the fixing of the cable to the structure.
L'invention propose ainsi un dispositif pour fixer un câble de structure à un élément de construction, comprenant un bloc d'ancrage pourvu de moyens de coincement de brins constitutifs du câble, et une chape articulée sur l'élément de structure et présentant en direction du câble une tête traversée par un orifice dans lequel le câble est engagé, la chape ayant une configuration propre à retenir le bloc d'ancrage lorsqu'une traction est exercée sur le câble. Suivant l'invention, le bloc d'ancrage est au moins partiellement engagé dans l'orifice traversant la tête de chape, lequel orifice présente un taraudage recevant un filetage complémentaire formé sur la périphérie du bloc d'ancrage et/ou sur un organe de butée afin de retenir le bloc d'ancrage.The invention thus provides a device for fixing a structural cable to a construction element, comprising an anchoring block provided with means for wedging the strands constituting the cable, and a yoke articulated on the structural element and having in direction of the cable, a head crossed by an orifice in which the cable is engaged, the yoke having a configuration suitable for retaining the anchoring block when traction is exerted on the cable. According to the invention, the anchoring block is at least partially engaged in the orifice passing through the clevis head, which orifice has a thread receiving a complementary thread formed on the periphery of the anchoring block and / or on a stop to retain the anchor block.
Le vissage du bloc d'ancrage, ou de l'organe de butée, dans la tête de chape permet de réduire les dimensions de la chape, notamment en longueur et en épaisseur grâce notamment à une meilleure transmission des efforts entre le câble et l'élément de construction. Il en résulte notamment l'utilisation de pièces plus compactes permettant d'obtenir un meilleur effet de continuité entre le câble et ses moyens de raccordement à l'ouvrage.The screwing of the anchor block, or of the abutment member, in the yoke head makes it possible to reduce the dimensions of the yoke, in particular in length and in thickness thanks in particular to better transmission of the forces between the cable and the building element. This results in particular in the use of more compact parts making it possible to obtain a better effect of continuity between the cable and its means of connection to the structure.
Dans des modes de réalisation particuliers du dispositif : - la chape comporte deux flancs s'étendant depuis la tête jusqu'à une extrémité opposée de la chape où ils sont traversés par un axe d'articulation sur l'élément de structure, un accès à un côté arrière du bloc d'ancrage, transversalement à la direction de l'axe d'articulation, étant laissé entre les flancs de la chape ; - un tube de protection du câble est raccordé sur la tête de la chape ;In particular embodiments of the device: - the yoke has two sides extending from the head to an opposite end of the yoke where they are crossed by an axis of articulation on the structural element, access to a rear side of the anchoring block, transverse to the direction of the articulation axis, being left between the sides of the yoke; - a cable protection tube is connected to the head of the yoke;
- un joint procurant une liaison élastique est interposé entre le tube protecteur selon l'alinéa précédent et la tête de chape, afin de centrer le tube protecteur sur la tête de chape ;- A seal providing an elastic connection is interposed between the protective tube according to the preceding paragraph and the yoke head, in order to center the protective tube on the yoke head;
- le câble est composé de torons protégés chacun par une gaine individuelle en matière plastique qui s'interrompt dans une chambre formée à l'avant du bloc d'ancrage et traversée par les torons, de façon que les torons soient coincés dans le bloc d'ancrage dans une portion où ils sont dépourvus de gaine, la chambre étant remplie d'un matériau protecteur, et une partie au moins de la paroi de la chambre est solidaire d'une pièce vissée dans le taraudage formé dans la tête de la chape, ladite pièce pouvant former un organe de butée contre lequel est appliqué le bloc d'ancrage ;- the cable is made up of strands each protected by an individual plastic sheath which is interrupted in a chamber formed at the front of the anchoring block and crossed by the strands, so that the strands are wedged in the anchoring block in a portion where they are devoid of sheath, the chamber being filled with a protective material, and at least part of the wall of the chamber is integral with a part screwed into the internal thread formed in the head of the yoke, said part being able to form a stop member against which the anchoring block is applied;
- le côté avant de la chambre suivant l'alinéa précédent est fermé par un système d'étanchéité de type presse-étoupe comprenant au moins deux plaques rigides traversées par les torons, au moins un coussin élastique placé entre deux des plaques et des moyens de serrage du coussin entre les plaques ;the front side of the chamber according to the preceding paragraph is closed by a sealing system of the cable gland type comprising at least two rigid plates traversed by the strands, at least one elastic cushion placed between two of the plates and means of clamping of the cushion between the plates;
- les moyens de serrage suivant l'alinéa précédent comprennent un piston venant en appui contre la plaque extérieure du système d'étanchéité et relié à un filetage engagé sur le taraudage formé dans la tête de la chape ;- The clamping means according to the preceding paragraph comprise a piston bearing against the outer plate of the sealing system and connected to a thread engaged on the tapping formed in the head of the yoke;
- la chambre suivant l'un quelconque des trois alinéas précédents s'étend au moins en partie à l'intérieur de la tête de la chape ;- The chamber according to any one of the three preceding paragraphs extends at least partially inside the head of the yoke;
- la chambre suivant l'un quelconque des quatre alinéas précédents communique avec une autre chambre située sur le côté arrière du bloc d'ancrage, remplie du même matériau protecteur et fermée par un capot.- The chamber according to any one of the four preceding paragraphs communicates with another chamber situated on the rear side of the anchoring block, filled with the same protective material and closed by a cover.
D'autres particularités et avantages de la présente invention apparaîtront dans la description ci-après d'exemples de réalisation non limitatifs, en référence aux dessins annexés, dans lesquels :Other features and advantages of the present invention will appear in the following description of nonlimiting exemplary embodiments, with reference to the appended drawings, in which:
- la figure 1 est une vue en coupe longitudinale schématique d'un dispositif de fixation selon l'invention ;- Figure 1 is a schematic longitudinal sectional view of a fixing device according to the invention;
- la figure 2 est une vue en perspective d'une chape du dispositif ;- Figure 2 is a perspective view of a yoke of the device;
- la figure 3 est une vue en coupe montrant un exemple de moyens d'ancrage et de protection d'un hauban dans le dispositif de la figure 1 ;- Figure 3 is a sectional view showing an example of means for anchoring and protecting a stay in the device of Figure 1;
- la figure 4 est un schéma d'une organe faisant partie d'une variante des moyens de protection.- Figure 4 is a diagram of an organ forming part of a variant of the protection means.
L'invention est illustrée ci-après dans son application aux ponts à haubans. Le dispositif représenté sur les dessins sert par exemple à fixer l'extrémité inférieure d'un hauban au tablier du pont. Le lecteur appréciera qu'un dispositif semblable pourrait être employé à l'extrémité supérieure du hauban, et plus généralement pour réaliser la fixation d'autres types de câbles de structure utilisés dans les techniques de la construction. Le hauban représenté sur la figure 1 est composé d'un faisceau de torons sensiblement parallèles 10. Dans l'exemple représenté, chaque toron est de type gainé-graissé ou gainé-ciré. Il se compose d'un brin travaillant en traction, formé d'un assemblage toronné de filaments métalliques, noyé dans un matériau protecteur tel qu'une graisse ou une cire, et contenu dans une gaine individuelle en matière plastique telle qu'un polyéthylène à haute densité (PEHD).The invention is illustrated below in its application to cable-stayed bridges. The device shown in the drawings is used, for example, to fix the lower end of a stay to the bridge deck. The reader will appreciate that a similar device could be used at the upper end of the shroud, and more generally for fixing other types of structural cables used in construction techniques. The shroud shown in FIG. 1 is composed of a bundle of substantially parallel strands 10. In the example shown, each strand is of the sheathed-greased or sheathed-waxed type. It consists of a strand working in traction, formed of a stranded assembly of metallic filaments, embedded in a protective material such as a grease or a wax, and contained in an individual plastic sheath such as a polyethylene with high density (HDPE).
Les extrémités des torons constitutifs du câble sont coincées dans un bloc d'ancrage 12 retenu dans une chape 13. La chape 13 est représentée sur la figure 2. Elle comporte une tête 14 traversée par un orifice taraudé 15 coaxial au hauban. A son extrémité opposée, la chape 13 comporte deux flasques 16 portés par des flancs 17 s' étendant depuis la tête 14.The ends of the strands constituting the cable are wedged in an anchoring block 12 retained in a yoke 13. The yoke 13 is shown in FIG. 2. It comprises a head 14 crossed by a tapped orifice 15 coaxial with the shroud. At its opposite end, the yoke 13 comprises two flanges 16 carried by flanks 17 extending from the head 14.
La chape 13 est installée avec ses deux flasques 16 disposés de part et d'autre d'un support 18 solidaire du tablier (figure 1 ). Un axe d'articulation horizontal 19 traverse les flasques 16 de la chape et le support 18 afin d'articuler la chape 13 par rapport au tablier.The yoke 13 is installed with its two flanges 16 arranged on either side of a support 18 secured to the deck (Figure 1). A horizontal hinge pin 19 passes through the flanges 16 of the yoke and the support 18 in order to articulate the yoke 13 relative to the deck.
Le bloc d'ancrage 12 est engagé et vissé dans l'orifice taraudé 15 présent dans la tête 14 de la chape. Il présente ainsi une forme générale cylindrique, dont la périphérie présente un filetage 21 complémentaire du taraudage présent dans la tête 14. Une bague optionnelle 27 présentant également un filetage complémentaire 37 est vissée dans l'orifice taraudé 15 à l'avant du bloc d'ancrage 12. Cette bague 37 contribue à retenir en place le bloc 12 qui est en appui contre elle. Dans une variante de réalisation, le bloc 12 n'est pas fileté, mais seulement la bague 27 à laquelle on donne alors une longueur suffisante pour la reprise de l'effort de traction.The anchoring block 12 is engaged and screwed into the threaded orifice 15 present in the head 14 of the yoke. It thus has a generally cylindrical shape, the periphery of which has a thread 21 complementary to the thread present in the head 14. An optional ring 27 also having a complementary thread 37 is screwed into the threaded orifice 15 at the front of the block. anchoring 12. This ring 37 contributes to retaining in place the block 12 which bears against it. In an alternative embodiment, the block 12 is not threaded, but only the ring 27 which is then given a sufficient length for the recovery of the tensile force.
En conséquence, il n'est pas nécessaire de prévoir que les flancs 17 de la chape 13 aient une longueur et un écartement suffisants pour loger l'ensemble du bloc d'ancrage et permettre un accès aisé à celui-ci. En outre, une bonne transmission des efforts dans la chape 13 lui permet d'être de constitution plus légère que dans les dispositifs antérieurs.Consequently, it is not necessary to provide that the sides 17 of the yoke 13 have a length and a spacing sufficient to accommodate the whole of the anchoring block and allow easy access thereto. In addition, good transmission of forces in the yoke 13 allows it to be lighter in construction than in the prior devices.
Comme le montre la figure 3, la gaine individuelle de chaque toron 10 est interrompue en avant de la face frontale du bloc d'ancrage 12. L'extrémité dénudée de chaque toron 10 traverse un orifice ménagé dans le bloc 12, se terminant par une embouchure tronconique sur la face arrière du bloc 12. Sur cette face arrière, un mors d'ancrage 24, de forme tronconique complémentaire de celle de l'embouchure, est placé autour du toron afin de le coincer dans le bloc 12.As shown in FIG. 3, the individual sheath of each strand 10 is interrupted in front of the front face of the anchoring block 12. The stripped end of each strand 10 passes through an orifice formed in the block 12, ending in a frustoconical mouth on the rear face of the block 12. On this rear face, an anchoring jaw 24, of complementary frustoconical shape from that of the mouth, is placed around the strand in order to wedge it in block 12.
Pour protéger contre la corrosion les extrémités dénudées des torons 10, une chambre 25 remplie d'un matériau protecteur non représenté tel qu'une cire ou une résine est disposée sur le côté avant du bloc d'ancrage 12, de façon que l'interruption de la gaine individuelle de chaque toron soit située à l'intérieur de cette chambre. La chambre 25 est délimitée latéralement par une paroi cylindrique 26, par exemple soudée sur la bague filetée 27.To protect the exposed ends of the strands 10 from corrosion, a chamber 25 filled with a protective material, not shown, such as a wax or a resin, is arranged on the front side of the anchoring block 12, so that the interruption of the individual sheath of each strand is located inside this chamber. The chamber 25 is delimited laterally by a cylindrical wall 26, for example welded to the threaded ring 27.
A l'opposé du bloc 12, la chambre 25 est fermée par un système d'étanchéité de type presse-étoupe (voir brevet européen 0 323 285). Dans l'exemple représenté, ce système d'étanchéité comprend trois plaques rigides 28a, 28b, 28c, par exemple en PEHD, traversées par des orifices positionnés pour laisser passer les torons gainés 10, et deux coussins élastiques 29, par exemple en mousse, pris en sandwich entre les plaques rigides 28a, 28b, 28c et également traversés par les torons gainés 10. Des tiges filetées 30 s'étendent à l'intérieur de la chambre 25 entre le bloc d'ancrage 12 et le système d'étanchéité. Ces tiges 30 traversent les plaques 28a, 28b, 28c et les coussins 29 et reçoivent des écrous 31 au-delà du système d'étanchéité et/ou à l'arrière du bloc 12. Des entretoises 32 sont disposées dans la chambre 25, par exemple autour des tiges filetées 30, pour définir l'ecartement entre la face avant du bloc d'ancrage 12, et la plaque rigide la plus intérieure 28a. Le serrage des écrous 31 depuis le côté avant et/ou le côté arrière du dispositif permet alors de comprimer les coussins 29 pour réaliser l'étanchéité à l'avant de la chambre 25. Un ou plusieurs canaux non représentés sont ménagés dans le bloc d'ancrage 12 pour faire communiquer la chambre 25 avec une autre chambre 34 située sur la face arrière du bloc. Cette chambre 34 est délimitée par un capot 35 coiffant le côté arrière du bloc 12 de manière étanche. Le capot 35 peut être boulonné sur le bloc 12 comme représenté, ou encore vissé dans l'orifice taraudé 15 de la chape. Le capot 35 porte un orifice d'injection 36 pour la cire protectrice. Après injection, celle-ci vient combler la chambre 34, les interstices laissés libres dans le bloc d'ancrage 12, ainsi que la chambre 25 dans laquelle la gaine individuelle des torons 10 s'interrompt, afin de protéger contre la corrosion les parties métalliques exposées des torons. Pour enfiler les torons 10 dans le bloc d'ancrage 12 préalablement vissé dans la tête de chape, mettre en place les mors de coincement 24, les tiges filetées 30 et le capot 35 et procéder à l'injection de cire, on a besoin d'accéder au côté arrière du bloc, entre les flancs 17 de la chape Un certain espace est ainsi laissé disponible en arrière du bloc 12 et du capot 35 comme le montre la figure 1 Mais l'incidence de cet espace sur les dimensions de la chape est réduit du fait que le bloc 12 pénètre dans la tête de chape 14 où il est vissé, et que les flancs 17 de la chape sont transversaux à l'axe d'articulation 19, laissant ainsi un accès au côté arrière du bloc d'ancrage transversalement à la direction de l'axe d'articulationOpposite the block 12, the chamber 25 is closed by a sealing system of the cable gland type (see European patent 0 323 285). In the example shown, this sealing system comprises three rigid plates 28a, 28b, 28c, for example made of HDPE, traversed by orifices positioned to allow the sheathed strands 10 to pass, and two elastic cushions 29, for example made of foam, sandwiched between the rigid plates 28a, 28b, 28c and also crossed by the sheathed strands 10. Threaded rods 30 extend inside the chamber 25 between the anchoring block 12 and the sealing system. These rods 30 pass through the plates 28a, 28b, 28c and the cushions 29 and receive nuts 31 beyond the sealing system and / or at the rear of the block 12. Spacers 32 are arranged in the chamber 25, by example around the threaded rods 30, to define the spacing between the front face of the anchoring block 12, and the innermost rigid plate 28a. The tightening of the nuts 31 from the front side and / or the rear side of the device then makes it possible to compress the cushions 29 in order to seal the front of the chamber 25. One or more channels, not shown, are provided in the block d anchoring 12 to communicate the chamber 25 with another chamber 34 located on the rear face of the block. This chamber 34 is delimited by a cover 35 covering the rear side of the block 12 in a sealed manner. The cover 35 can be bolted to the block 12 as shown, or else screwed into the threaded orifice 15 of the yoke. The cover 35 carries an injection orifice 36 for the protective wax. After injection, this fills the chamber 34, the gaps left free in the anchoring block 12, as well as the chamber 25 in which the individual sheath of the strands 10 is interrupted, in order to protect the metal parts from corrosion. exposed strands. To thread the strands 10 into the anchor block 12 previously screwed into the clevis head, set the clamping jaws 24, the threaded rods 30 and the cover 35 and injecting wax, we need to access the rear side of the block, between the sides 17 of the yoke A certain space is thus left available behind the block 12 and the cover 35 as shown in FIG. 1 But the impact of this space on the dimensions of the yoke is reduced because the block 12 penetrates into the yoke head 14 where it is screwed, and that the sides 17 of the yoke are transverse to the hinge pin 19, thus leaving access to the rear side of the anchor block transverse to the direction of the hinge axis
L'agencement du dispositif de fixation peut en outre permettre de se dispenser des tubes-guides et déviateurs employés dans les fixations de hauban habituelles L'articulation de la chape 13 sur le tablier permet de tolérer un certain mouvement du hauban Pour laisser les torons diverger vers le bloc d'ancrage 12, on peut allonger la chambre 25 et le système d'étanchéité, ce que facilite la conception d'ensemble du dispositif, notamment le fait que la chambre 25 puisse s'étendre, au moins en partie, dans l'orifice taraudé 15 de la tête de chapeThe arrangement of the fixing device can also make it possible to dispense with the guide tubes and deflectors used in the usual stay cable fastenings. The articulation of the yoke 13 on the deck allows to tolerate a certain movement of the stay cable. towards the anchoring block 12, the chamber 25 and the sealing system can be extended, which facilitates the overall design of the device, in particular the fact that the chamber 25 can extend, at least in part, in the threaded orifice 15 of the clevis head
Après avoir installé la chape 13, le bloc d'ancrage 12, les torons 10 et leurs mors 24, le système d'étanchéité et le capot 35, et avoir procédé à l'injection de cire, on met en place un tube protecteur 40 sur la portion du hauban émergeant du bloc d'ancrage et de la chambre 25 Ce tube 40 peut être raccordé continûment sur la tête de chape 14, avec interposition d'un joint d'étanchéité 41 comme le montrent les figures 1 et 3 Le tube 40 assure la continuité avec la gaine contenant le faisceau de torons dans la partie courante du hauban II peut comporter des canaux d'évacuation d'eau non représentés II sert en outre à protéger les torons 10 contre les accidents de circulation et le vandalisme à la base du hauban Lorsque le joint 41 a une forme torique à section tubulaire comme représenté, il réalise une articulation élastique autocentrée entre la chape et la gaine du haubanAfter installing the yoke 13, the anchoring block 12, the strands 10 and their jaws 24, the sealing system and the cover 35, and having injected wax, a protective tube 40 is put in place. on the portion of the shroud emerging from the anchoring block and from the chamber 25 This tube 40 can be connected continuously to the clevis head 14, with the interposition of a seal 41 as shown in FIGS. 1 and 3 The tube 40 ensures continuity with the sheath containing the bundle of strands in the running part of the shroud II may include water drainage channels not shown II also serves to protect the strands 10 against traffic accidents and vandalism to the base of the shroud When the joint 41 has a toric shape with a tubular section as shown, it produces a self-centered elastic articulation between the yoke and the sheath of the shroud
La figure 4 illustre une variante de réalisation dans laquelle les moyens de serrage utilisés pour comprimer le ou les coussins 29 entre les plaques rigides du système d'étanchéité comprennent un piston 44 défini par un rebord annulaire interne d'une pièce 45 de forme générale cylindrique Vers le bloc d'ancrage 12, la pièce 45 se termine par une portion 46 filetée extérieurement, complémentaire du taraudage 15 formé dans la tête 14 de la chape Ainsi, en vissant la pièce 45 sur la chape, on appuie sur la plaque extérieure 28c du système d'étanchéité, ce qui comprime les coussins 29 pour réaliser l'étanchéité si la plaque intérieure 28a bute contre une ou plusieurs entretoises placées dans la chambre 25. On peut notamment prévoir une entretoise cylindrique placée entre le faisceau de torons et la pièce 45. En outre, la pièce 45 ou cette entretoise peut servir à délimiter latéralement la chambre 25 contenant la cire protectrice. A l'opposé du bloc d'ancrage, la pièce se termine par exemple par une portion 47 filetée intérieurement afin de venir se raccorder sur la partie courante de la gaine extérieure du hauban. On peut ainsi se dispenser du tube protecteur supplémentaire 40 de la figure 3. FIG. 4 illustrates an alternative embodiment in which the clamping means used to compress the cushion or cushions 29 between the rigid plates of the sealing system comprise a piston 44 defined by an internal annular rim of a part 45 of generally cylindrical shape Towards the anchor block 12, the part 45 ends with an externally threaded portion 46, complementary to the internal thread 15 formed in the head 14 of the yoke. Thus, by screwing the part 45 on the yoke, one presses on the outer plate 28c. of the sealing system, which compresses the cushions 29 for sealing if the inner plate 28a abuts against one or more spacers placed in the chamber 25. One can in particular provide a cylindrical spacer placed between the bundle of strands and the part 45. In addition, the part 45 or this spacer can be used laterally delimiting the chamber 25 containing the protective wax. Opposite the anchoring block, the part ends, for example, by a portion 47 internally threaded in order to be connected to the current part of the outer sheath of the stay. It is thus possible to dispense with the additional protective tube 40 of FIG. 3.

Claims

R E V E N D I C A T I O N S
1. Dispositif pour fixer un câble de structure à un élément de construction, comprenant un bloc d'ancrage (12) pourvu de moyens (24) de coincement de brins constitutifs du câble (10), et une chape (13) articulée sur l'élément de structure et présentant en direction du câble une tête (14) traversée par un orifice (15) dans lequel le câble est engagé, la chape ayant une configuration propre à retenir le bloc d'ancrage lorsqu'une traction est exercée sur le câble, caractérisé en ce que le bloc d'ancrage est au moins partiellement engagé dans l'orifice (15) traversant la tête de chape, lequel orifice présente un taraudage recevant un filetage complémentaire (21 , 37) formé sur la périphérie du bloc d'ancrage (12) et/ou sur un organe de butée (27) afin de retenir le bloc d'ancrage.1. Device for fixing a structural cable to a building element, comprising an anchoring block (12) provided with means (24) for wedging the constituent strands of the cable (10), and a yoke (13) articulated on the structural element and having in the direction of the cable a head (14) through which an orifice (15) in which the cable is engaged, the yoke having a configuration suitable for retaining the anchoring block when traction is exerted on the cable, characterized in that the anchoring block is at least partially engaged in the orifice (15) passing through the clevis head, which orifice has a thread receiving a complementary thread (21, 37) formed on the periphery of the block anchoring (12) and / or on a stop member (27) in order to retain the anchoring block.
2. Dispositif selon la revendication 1 , dans lequel la chape (13) comporte deux flancs (17) s' étendant depuis la tête (14) jusqu'à une extrémité opposée de la chape où ils sont traversés par un axe (19) d'articulation sur l'élément de structure, un accès à un côté arrière du bloc d'ancrage (12), transversalement à la direction de l'axe d'articulation, étant laissé entre les flancs de la chape.2. Device according to claim 1, wherein the yoke (13) has two sides (17) extending from the head (14) to an opposite end of the yoke where they are crossed by an axis (19) d hinge on the structural element, access to a rear side of the anchor block (12), transverse to the direction of the hinge pin, being left between the sides of the yoke.
3. Dispositif selon la revendication 1 ou 2, dans lequel un tube (40) de protection du câble est raccordé sur la tête (14) de la chape.3. Device according to claim 1 or 2, wherein a cable protection tube (40) is connected to the head (14) of the yoke.
4. Dispositif selon la revendication 3, dans lequel un joint (41 ) procurant une liaison élastique est interposé entre le tube protecteur (40) et la tête de chape (14), afin de centrer le tube protecteur sur la tête de chape.4. Device according to claim 3, wherein a seal (41) providing an elastic connection is interposed between the protective tube (40) and the yoke head (14), in order to center the protective tube on the yoke head.
5. Dispositif selon l'une quelconque des revendications 1 à 4, dans lequel le câble est composé de torons (10) protégés chacun par une gaine individuelle en matière plastique qui s'interrompt dans une chambre (25) formée à l'avant du bloc d'ancrage (12) et traversée par les torons, de façon que les torons soient coincés dans le bloc d'ancrage dans une portion où ils sont dépourvus de gaine, la chambre étant remplie d'un matériau protecteur, et dans lequel une partie au moins de la paroi de la chambre (26) est solidaire d'une pièce (27) vissée dans le taraudage (15) formé dans la tète (14) de la chape. 5. Device according to any one of claims 1 to 4, in which the cable is made up of strands (10) each protected by an individual plastic sheath which is interrupted in a chamber (25) formed at the front of the anchor block (12) and traversed by the strands, so that the strands are trapped in the anchor block in a portion where they have no sheath, the chamber being filled with a protective material, and in which a at least part of the wall of the chamber (26) is integral with a part (27) screwed into the thread (15) formed in the head (14) of the yoke.
6. Dispositif selon la revendication 5, dans lequel ladite pièce (27) forme un organe de butée contre lequel est appliqué le bloc d'ancrage (12).6. Device according to claim 5, wherein said part (27) forms a stop member against which is applied the anchor block (12).
7. Dispositif selon la revendication 5 ou 6, dans lequel le côté avant de ladite chambre (25) est fermé par un système d'étanchéité de type presse- étoupe comprenant au moins deux plaques rigides (28a, 28b, 28c) traversées par les torons (10), au moins un coussin élastique (29) placé entre deux des plaques et des moyens (30, 31 , 32) de serrage du coussin entre les plaques.7. Device according to claim 5 or 6, wherein the front side of said chamber (25) is closed by a packing type sealing system comprising at least two rigid plates (28a, 28b, 28c) through which the strands (10), at least one elastic cushion (29) placed between two of the plates and means (30, 31, 32) for clamping the cushion between the plates.
8. Dispositif selon la revendication 7, dans lequel les moyens de serrage comprennent un piston (44) venant en appui contre la plaque extérieure (28c) du système d'étanchéité et relié à un filetage (46) engagé sur le taraudage (15) formé dans la tête (14) de la chape.8. Device according to claim 7, wherein the clamping means comprise a piston (44) bearing against the outer plate (28c) of the sealing system and connected to a thread (46) engaged on the thread (15) formed in the head (14) of the yoke.
9. Dispositif selon l'une quelconque des revendications 5 à 8, dans lequel ladite chambre (25) s'étend au moins en partie à l'intérieur de la tête (14) de la chape.9. Device according to any one of claims 5 to 8, wherein said chamber (25) extends at least partially inside the head (14) of the yoke.
10. Dispositif selon l'une quelconque des revendications 5 à 9, dans lequel ladite chambre (25) communique avec une autre chambre (34) située sur le côté arrière du bloc d'ancrage (12), remplie du même matériau protecteur et fermée par un capot (35). 10. Device according to any one of claims 5 to 9, wherein said chamber (25) communicates with another chamber (34) located on the rear side of the anchor block (12), filled with the same protective material and closed by a cover (35).
PCT/FR2000/000704 1999-03-23 2000-03-21 Device for fixing a structural cable to a building element WO2000056994A1 (en)

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AU33022/00A AU3302200A (en) 1999-03-23 2000-03-21 Device for fixing a structural cable to a building element
MXPA01006115A MXPA01006115A (en) 1999-03-23 2000-03-21 Device for fixing a structural cable to a building element.

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FR9903583A FR2791373B1 (en) 1999-03-23 1999-03-23 DEVICE FOR FIXING A STRUCTURAL CABLE TO A CONSTRUCTION ELEMENT

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CN101608426B (en) * 2008-06-20 2012-04-04 上海浦江缆索股份有限公司 Preforming traction mechanism of unit strand imitating main cable linearity of suspension bridge
CN102535342A (en) * 2012-01-12 2012-07-04 江苏法尔胜缆索有限公司 Cable-end sealing method for suspension cable of suspension bridge
CN102787558A (en) * 2012-08-29 2012-11-21 湖南大学 Stay rope anchorage structure for cable-stayed bridge
CN104947590A (en) * 2015-06-19 2015-09-30 柳州欧维姆机械股份有限公司 Separated-type cable lug
CN106012837A (en) * 2016-07-29 2016-10-12 重庆万桥交通科技发展有限公司 Novel stay cable HDPE waterproof jacket
WO2017036514A1 (en) * 2015-08-31 2017-03-09 Vsl International Ag Cable anchorage system
EP3388579A1 (en) * 2017-04-13 2018-10-17 VSL International AG Fixing of stay cable

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WO2023179878A1 (en) * 2022-03-25 2023-09-28 Vsl International Ag Cable anchorage system and method for anchoring a cable

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Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101608426B (en) * 2008-06-20 2012-04-04 上海浦江缆索股份有限公司 Preforming traction mechanism of unit strand imitating main cable linearity of suspension bridge
CN102535342A (en) * 2012-01-12 2012-07-04 江苏法尔胜缆索有限公司 Cable-end sealing method for suspension cable of suspension bridge
CN102535342B (en) * 2012-01-12 2013-06-05 江苏法尔胜缆索有限公司 Cable-end sealing method for suspension cable of suspension bridge
CN102787558A (en) * 2012-08-29 2012-11-21 湖南大学 Stay rope anchorage structure for cable-stayed bridge
CN102787558B (en) * 2012-08-29 2014-08-20 湖南大学 Stay rope anchorage structure for cable-stayed bridge
CN104947590A (en) * 2015-06-19 2015-09-30 柳州欧维姆机械股份有限公司 Separated-type cable lug
RU2684658C1 (en) * 2015-08-31 2019-04-11 Фсл Интернациональ Аг Cable anchoring system
WO2017036514A1 (en) * 2015-08-31 2017-03-09 Vsl International Ag Cable anchorage system
JP2018526549A (en) * 2015-08-31 2018-09-13 ファウ・エス・エル・インターナツイオナール・アクチエンゲゼルシヤフト Cable mooring system
US10920383B2 (en) 2015-08-31 2021-02-16 Vsl International Ag Cable anchorage system
AU2015407931B2 (en) * 2015-08-31 2020-05-28 Vsl International Ag Cable anchorage system
CN106012837A (en) * 2016-07-29 2016-10-12 重庆万桥交通科技发展有限公司 Novel stay cable HDPE waterproof jacket
WO2018189665A1 (en) * 2017-04-13 2018-10-18 Vsl International Ag Fixing of a stay cable
EP3388579A1 (en) * 2017-04-13 2018-10-17 VSL International AG Fixing of stay cable

Also Published As

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MXPA01006115A (en) 2002-05-06
FR2791373A1 (en) 2000-09-29
FR2791373B1 (en) 2001-06-15
AU3302200A (en) 2000-10-09

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