EP0323285B2 - Stay cables and their anchorage - Google Patents

Stay cables and their anchorage Download PDF

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Publication number
EP0323285B2
EP0323285B2 EP88402934A EP88402934A EP0323285B2 EP 0323285 B2 EP0323285 B2 EP 0323285B2 EP 88402934 A EP88402934 A EP 88402934A EP 88402934 A EP88402934 A EP 88402934A EP 0323285 B2 EP0323285 B2 EP 0323285B2
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EP
European Patent Office
Prior art keywords
strands
block
stay
chamber
perforated
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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EP88402934A
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German (de)
French (fr)
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EP0323285A1 (en
EP0323285B1 (en
Inventor
Jean-Claude Percheron
Pierre Jartoux
Carlos De La Fuente
André Stouffs
Luc De Cordier
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Sa Laboratoire De Cinematique Nv
Freyssinet International STUP SA
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Sa Laboratoire De Cinematique Nv
Freyssinet International STUP SA
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Application filed by Sa Laboratoire De Cinematique Nv, Freyssinet International STUP SA filed Critical Sa Laboratoire De Cinematique Nv
Priority to AT88402934T priority Critical patent/ATE76139T1/en
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    • 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
    • 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
    • E01D19/16—Suspension cables; Cable clamps for suspension cables ; Pre- or post-stressed cables
    • 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 assemblies comprising on the one hand cables or shrouds having a high tensile strength and composed of a plurality of strands themselves constituted individually by sets of parallel or twisted metal wires and on the other hand anchoring structures for the ends of these shrouds.
  • the various constituent strands are generally brought together in a common protective envelope and linked together transversely by a protective binder which fills the intervals between the strands and the envelope.
  • This binder is generally a grout of injected cement hardened after injection.
  • the protective binder is a fatty or the like.
  • the aim sought by this other formula is to make possible the individual replacement of the strands.
  • the object of the invention is, above all, to remedy these drawbacks.
  • 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.
  • Figure 1 shows, upper half in schematic axial section and lower half in external view, the head of a shroud established according to the invention.
  • Figure 2 shows in axial section on a larger scale a terminal portion of a head similar to the previous one.
  • Figure 3 is an enlarged cross section of a guy like that cut along III-III, Figure 1.
  • Figure 4 is an enlarged cross section of one of the strands constituting said stay.
  • the shroud considered is composed of a plurality of individual strands 1.
  • the number of these strands is generally less than 100, preferably being between 15 and 70.
  • Each strand 1 is itself formed by a plurality of elementary wires 2, for example the number of 7 in the embodiment illustrated in FIG. 4.
  • wires can be parallel or twisted: in the latter case, the corresponding strands are generally designated by the name of "strands".
  • the wires 2 are for example made of drawn and galvanized steel.
  • All of these wires are surrounded by a protective sheath 3 which is able to protect them during their whole life against corrosion due to bad weather or other external aggressions, and in particular to humidity and handling.
  • This sheath is for example made of a plastic material, such as polyethylene or a polyamide, or a metal such as aluminum or stainless steel.
  • the sheath in question can also be constituted by any other desirable coating of the wire bundle 2, for example by an epoxy paint coated on it.
  • the intervals between the wires 2 and the sheath 3, if they exist, may or may not be filled with a protective substance 4 such as, for example, a resinous pitch of the epoxy type or a wax.
  • Each strand 1 is manufactured in the factory and it is available at the exit of this factory in the form of a site coil.
  • the thickness of the sheath 3 a value low enough to make possible the winding of the strand: if it is a metal, we give said thickness a value of the order of 1/10 of mm.
  • the sheathed strands 1 thus defined, all identical to each other, are autonomous and remain so throughout the life of the stay they constitute.
  • each jaw 5 has, on the one hand, a cylindrical internal bore suitable for contiguously surrounding the end of the strand to be anchored, and, on the other hand, a frustoconical external surface suitable for cooperating with a complementary housing hollowed out in an anchoring block 6.
  • This cable gland 8 comprises two transverse perforated plates 81, 82 between which is interposed a cushion 83 made of elastomeric or similar material, and means suitable for bringing the two plates closer together, which causes the cushion to swell while ensuring the desired seals.
  • Chamber A communicates by a channel 12 with a chamber B provided outside of block 6 and delimited by a cover 13 applied contiguously against this block, by tightening screws 14.
  • the assembly of the two chambers A and B is filled at the end of the anchoring of all the strands 1 on the block 6 with a grease or similar material having simultaneously the following properties: flexibility, weak adhesion with respect to the strands and their bare ends, protection of these ends against corrosion.
  • a ring 15 suitable for resting itself axially against an annular bearing 16 forming part of a structure 17 for anchoring the guy, structure such as a pylon top or a solid mass on the ground.
  • the portions, of stretched strands 1, which are arranged outside of the grease box A, B, can be parallel to each other and be directly exposed to the air.
  • the collar 19 can be easily disassembled, which makes it possible to separate the various strands 1 from each other, it is advantageously constituted by two half-shells which can be assembled and separated at will.
  • the bundle can be left in the open air or be itself protected by an envelope 20 of any desired nature and size, for example made of polyethylene.
  • each strand 1 and its environment are located at the level of the individual anchors (jaws 5 in the illustrated case): the other elements which are in contact with these strands are the furs 26 and 83 cushions.
  • Each strand can therefore be considered completely autonomous over its entire length and can be stretched or relaxed independently of its neighbors.
  • each strand 1 it may be useful to give the free ends 21 (FIG. 2) of these strands, which protrude beyond the anchoring members, a greater length. than that shown, to facilitate the taking of these ends.

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  • Architecture (AREA)
  • Engineering & Computer Science (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Piles And Underground Anchors (AREA)
  • Bridges Or Land Bridges (AREA)
  • Joining Of Building Structures In Genera (AREA)
  • Cable Accessories (AREA)
  • Shutters For Cameras (AREA)
  • Pit Excavations, Shoring, Fill Or Stabilisation Of Slopes (AREA)
  • Reinforcement Elements For Buildings (AREA)
  • Conveying And Assembling Of Building Elements In Situ (AREA)
  • Compounds Of Unknown Constitution (AREA)
  • Jib Cranes (AREA)
  • Dental Preparations (AREA)

Abstract

The cable lines (1) forming the stay cable, mounted so as to be able to work and to be dismantled independently of one another, each consist of an assembly of parallel or twisted steel wires, surrounded by a sheath (3) in polyethylene, polyamide or a corrosion-resistant metal, with interposition of a filling material, such as an epoxy-type resinous pitch, or a wax. The ends of the cable lines (1), stripped of their sheaths (3) for their individual anchoring on a perforated block (6) are embedded in a protective grease. The grease chamber (A), formed by a sleeve (7) connected to the anchoring block (6), is closed by a stuffing-box seal (8) traversed by the cable lines (1), which are sheathed again, and comprising an outer plate (82) which, controlled by clamping rods (10) which can be actuated from outside the anchoring block (6), presses an elastomer cushion (83) against an inner plate (81) bearing on spacer rings (11) arranged in the chamber (A). <IMAGE>

Description

L'invention est relative aux ensembles comportant d'une part des câbles ou haubans présentant une grande résistance à la traction et composés d'une pluralité de brins eux-mêmes constitués individuellement par des ensembles de fils métalliques parallèles ou torsadés et d'autre part des structures d'ancrage pour les extrémités de ces haubans.The invention relates to assemblies comprising on the one hand cables or shrouds having a high tensile strength and composed of a plurality of strands themselves constituted individually by sets of parallel or twisted metal wires and on the other hand anchoring structures for the ends of these shrouds.

Elle vise plus particulièrement, mais non exclusivement, parmi ces ensembles, ceux qui sont destinés à équiper les ponts haubanés en reliant les sommets des pylônes de ces ponts à leurs tabliers et à leurs massifs d'ancrage.It is aimed more particularly, but not exclusively, among these assemblies, those which are intended to equip the cable-stayed bridges by connecting the tops of the pylons of these bridges with their decks and their anchor blocks.

Elle vise également les brins composant lesdits haubans.It also targets the strands making up said stay cables.

Dans les modes de réalisation connus des haubans du genre en question, les différents brins constitutifs sont généralement rassemblés dans une enveloppe de protection commune et liés entre eux transversalement par un liant de protection qui remplit les intervalles compris entre les brins et l'enveloppe.In the known embodiments of guy wires of the type in question, the various constituent strands are generally brought together in a common protective envelope and linked together transversely by a protective binder which fills the intervals between the strands and the envelope.

Ce liant est en général un coulis de ciment injecté durci après injection.This binder is generally a grout of injected cement hardened after injection.

Cette formule présente un certain nombre d'inconvénients tels que le poids élevé et la raideur du hauban, les risques de fissuration du coulis durci et surtout le fait que le hauban constitue un ensemble monobloc : il n'est donc pas possible de remplacer individuellement les brins qui le composent dans le cas où seulement certains de ces brins sont détériorés, par exemple à la suite d'un choc d'un véhicule ou chargement de véhicule contre le hauban.This formula presents a certain number of drawbacks such as the high weight and the stiffness of the shroud, the risks of cracking of the hardened grout and especially the fact that the shroud constitutes a one-piece assembly: it is therefore not possible to individually replace the strands which compose it in the case where only some of these strands are damaged, for example following an impact of a vehicle or vehicle loading against the shroud.

Selon une autre formule, le liant de protection est une grasse ou analogue.According to another formula, the protective binder is a fatty or the like.

Le but recherché par cette autre formule est de rendre possible le remplacement individuel des brins.The aim sought by this other formula is to make possible the individual replacement of the strands.

Mais dans la pratique une telle opération se révèle très difficile car il est nécessaire chaque fois de vider l'enveloppe de sa grasse et de la recharger ensuite en graisse : en particulier, cette graisse tend à s'écouler à l'extrémité la plus basse du hauban lors de l'ouverture de celle-ci, mais cet écoulement naturel ne suffit pas pour dégager l'enveloppe et rendre possible dans de bonnes conditions la mise en place du brin de câble neuf après dégagement du brin usagé.But in practice such an operation proves to be very difficult because it is necessary each time to empty the envelope of its fatty and then reload it with fat: in particular, this fat tends to flow out at the lowest end. shroud when opening it, but this natural flow is not enough to clear the envelope and make possible in good conditions the establishment of the new cable strand after clearing the used strand.

L'invention a pour but, surtout, de remédier à ces inconvénients.The object of the invention is, above all, to remedy these drawbacks.

A cet effet les ensembles du genre en question selon l'invention comprennent encore, d'une façon connue en soi, par exemple par le document JP-A-6 015 035, un bloc perforé sur lequel sont ancrées individuellement les extrémités dénudées des différents brins composant le hauban, une portée annulaire contre laquelle est appliqué axialement le pourtour du bloc, et un manchon auquel est raccordé ledit bloc du côté de ladite portée, la chambre formée à l'intérieur de ce manchon étant remplie d'une matière assurant la protection des portions dénudées de brins présentes dans cette chambre, les différents brins étant protégés par gainage indépendamment les uns des autres, la gaine de protection de chaque brin étant interrompue au niveau d'une tranche terminale à une petite distance de chaque extrémité de ce brin et la chambre ci-dessus contenant les tranches terminales des gaines et étant fermée de façon étanche, du côté du hauban, par un dispositif d'étanchéité traversé de façon étanche par des portions gainées des brins, et ils sont essentiellement caractérisés en ce que la matière protectrice est une graisse, et en ce que le dispositif d'étanchéité est un presse-étoupe comprenant

  • deux plaques perforées (8₁,8₂), dont l'une "intérieure" (8₁) est disposée du côté de la chambre ci-dessus (A) et dont l'autre "extérieure" (8₂) est disposée du côté du hauban,
  • un coussin d'étoupe (8₃) interposé entre ces deux plaques,
  • des tiges de serrage (10) fixées sur la plaque extérieure (8₂), tiges traversant librement, successivement, le bloc perforé (6) et la plaque intérieure (8₁) et actionnables depuis le côté, du bloc perforé, le plus éloigné du hauban, et
  • des bagues entretoises rigides (11) entourant librement les tiges de serrage et interposées axialement, directement ou non, entre le bloc perforé (6) et la plaque intérieure (8₁).
To this end, the assemblies of the kind in question according to the invention also comprise, in a manner known per se, for example from document JP-A-6 015 035, a perforated block on which the stripped ends of the various are individually anchored strands making up the shroud, an annular bearing surface against which the periphery of the block is applied axially, and a sleeve to which said block is connected on the side of said bearing, the chamber formed inside this sleeve being filled with a material ensuring the protection of the bare portions of strands present in this chamber, the different strands being protected by sheathing independently of each other, the protective sheath of each strand being interrupted at the level of a terminal slice at a small distance from each end of this strand and the above chamber containing the end sections of the sheaths and being closed in a sealed manner, on the side of the shroud, by a sealing device crossed in a sealed manner by sheathed portions of the strands, and they are essentially characterized in that the protective material is a grease, and in that the sealing device is a cable gland comprising
  • two perforated plates (8₁, 8₂), one of which "inside" (8₁) is placed on the side of the above chamber (A) and the other of which "outside" (8₂) is placed on the side of the guy wire,
  • a packing cushion (8₃) interposed between these two plates,
  • clamping rods (10) fixed on the outer plate (8₂), rods passing freely, successively, the perforated block (6) and the internal plate (8₁) and actuable from the side, of the perforated block, furthest from the shroud , and
  • rigid spacer rings (11) freely surrounding the clamping rods and interposed axially, directly or not, between the perforated block (6) and the inner plate (8₁).

On peut avoir recours en outre à l'une et/ou à l'autre des dispositions suivantes :

  • les différents brins gainés composant le hauban convergent légèrement à partir de leurs extrémités dénudées ancrées jusqu'à un collier de guidage au-delà duquel ils sont réunis jointivement de façon à former un faisceau de brins parallèles,
  • chaque brin est constitué par un ensemble de fils en acier noyés à l'intérieur d'une gaine de protection, notamment en polyéthylène, en polyamide ou en métal, avec éventuellement interposition d'un matériau de remplissage, tel qu'un brai résineux de type époxy ou qu'une cire.
One and / or the other of the following provisions may also be used:
  • the various sheathed strands making up the stay slightly converge from their bared ends anchored up to a guide collar beyond which they are joined together so as to form a bundle of parallel strands,
  • each strand is constituted by a set of steel wires embedded inside a protective sheath, in particular made of polyethylene, polyamide or metal, with possibly the interposition of a filling material, such as a resinous pitch of epoxy type or a wax.

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 des modes de réalisation préférés de l'invention en se référant au dessin ci-annexé d'une manière bien entendu non limitative.In what follows, we will describe preferred embodiments of the invention with reference to the accompanying drawing of course in a non-limiting manner.

La figure 1, de ce dessin, montre, moitié supérieure en coupe axiale schématique et moitié inférieure en vue extérieure, la tête d'un hauban établie selon l'invention.Figure 1, of this drawing, shows, upper half in schematic axial section and lower half in external view, the head of a shroud established according to the invention.

La figure 2 montre en coupe axiale à plus grande échelle une portion terminale d'une tête semblable à la précédente.Figure 2 shows in axial section on a larger scale a terminal portion of a head similar to the previous one.

La figure 3 est une coupe transversale agrandie d'un hauban du genre de celui coupé selon III-III, figure 1.Figure 3 is an enlarged cross section of a guy like that cut along III-III, Figure 1.

La figure 4 est une coupe transversale agrandie de l'un des brins constitutifs dudit hauban.Figure 4 is an enlarged cross section of one of the strands constituting said stay.

Le hauban considéré est composé d'une pluralité de brins individuels 1.The shroud considered is composed of a plurality of individual strands 1.

Le nombre de ces brins est généralement inférieur à 100, étant de préférence compris entre 15 et 70.The number of these strands is generally less than 100, preferably being between 15 and 70.

Chaque brin 1 est formé lui-même par une pluralité de fils élémentaires 2, par exemple au nombre de 7 dans la réalisation illustrée sur la figure 4.Each strand 1 is itself formed by a plurality of elementary wires 2, for example the number of 7 in the embodiment illustrated in FIG. 4.

Ces fils peuvent être parallèles ou torsadés : dans ce dernier cas, les brins correspondants sont généralement désignés sous le nom de "torons".These wires can be parallel or twisted: in the latter case, the corresponding strands are generally designated by the name of "strands".

Les fils 2 sont par exemple constitués en acier tréfilé et galvanisé.The wires 2 are for example made of drawn and galvanized steel.

L'ensemble de ces fils est entouré par une gaine de protection 3 qui est apte à protéger ceux-ci au cours de toute leur vie contre la corrosion due aux intempéries ou autres agressions extérieures, et notamment à l'humidité et aux manutentions.All of these wires are surrounded by a protective sheath 3 which is able to protect them during their whole life against corrosion due to bad weather or other external aggressions, and in particular to humidity and handling.

Cette gaine est par exemple constituée en une matière plastique, telle que le polyéthylène ou qu'une polyamide, ou en un métal tel que l'aluminium ou l'acier inoxydable.This sheath is for example made of a plastic material, such as polyethylene or a polyamide, or a metal such as aluminum or stainless steel.

Elle peut être directement rapportée sur le faisceau de fils par extrusion.It can be directly attached to the bundle of wires by extrusion.

La gaine en question peut également être constituée par tout autre revêtement désirable du faisceau de fils 2, par exemple par une peinture époxy enduite sur celui-ci.The sheath in question can also be constituted by any other desirable coating of the wire bundle 2, for example by an epoxy paint coated on it.

Les intervalles compris entre les fils 2 et la gaine 3, s'ils existent, peuvent être comblés ou non par une substance protectrice 4 telle que, par exemple, un brai résineux de type époxy ou une cire.The intervals between the wires 2 and the sheath 3, if they exist, may or may not be filled with a protective substance 4 such as, for example, a resinous pitch of the epoxy type or a wax.

Chaque brin 1 est fabriqué en usine et il est disponible à la sortie de cette usine sous la forme d'une bobine de chantier.Each strand 1 is manufactured in the factory and it is available at the exit of this factory in the form of a site coil.

On prévoit donc pour l'épaisseur de la gaine 3 une valeur suffisamment faible pour rendre possible l'enroulement du brin : s'il s'agit d'un métal, on donne à ladite épaisseur une valeur de l'ordre du 1/10 de mm.We therefore provide for the thickness of the sheath 3 a value low enough to make possible the winding of the strand: if it is a metal, we give said thickness a value of the order of 1/10 of mm.

Les brins gainés 1 ainsi définis, tous identiques entre eux, sont autonomes et le demeurent pendant toute la vie du hauban qu'ils constituent.The sheathed strands 1 thus defined, all identical to each other, are autonomous and remain so throughout the life of the stay they constitute.

Les montages de ces brins gainés sur les structures d'ancrage sont assurés individuellement d'une façon connue en soi, par exemple à l'aide de manchons filés ou encore, comme illustré, par serrage des extrémités dénudées desdits brins dans des mors fendus 5 : chaque mors 5 présente d'une part un alésage intérieur cylindrique propre à entourer jointivement l'extrémité du brin à ancrer, et d'autre part une surface extérieure tronconique propre à coopérer avec un logement complémentaire évidé dans un bloc d'ancrage 6.The assemblies of these sheathed strands on the anchoring structures are provided individually in a manner known per se, for example using spun sleeves or, as illustrated, by clamping the stripped ends of said strands in split jaws 5 : each jaw 5 has, on the one hand, a cylindrical internal bore suitable for contiguously surrounding the end of the strand to be anchored, and, on the other hand, a frustoconical external surface suitable for cooperating with a complementary housing hollowed out in an anchoring block 6.

La tranche terminale T de chaque gaine 3 au-delà de laquelle commence l'extrémité dénudée du brin 1 correspondant est située à l'intérieur d'une chambre A délimitée :

  • à une extrémité axiale, par le bloc 6,
  • transversalement, par un manchon rigide 7 prolongeant la périphérie du bloc 6 et fixé sur celui-ci à l'aide de vis 18,
  • et à l'extrémité axiale opposée au bloc 6, par un presse-étoupe 8 traversé de façon étanche par les brins gainés 1 et appliqué radialement de façon étanche contre la face intérieure du manchon 7.
The terminal section T of each sheath 3 beyond which the stripped end of the corresponding strand 1 begins is located inside a chamber A delimited:
  • at an axial end, by block 6,
  • transversely, by a rigid sleeve 7 extending the periphery of the block 6 and fixed thereon with screws 18,
  • and at the axial end opposite the block 6, by a cable gland 8 traversed in a sealed manner by the sheathed strands 1 and applied radially from tightly against the inside of the sleeve 7.

Ce presse-étoupe 8 comprend deux plaques perforées transversales 8₁, 8₂ entre lesquelles est interposé un coussin 8₃ en matériau élastomère ou analogue, et des moyens propres à rapprocher mutuellement les deux plaques, ce qui fait gonfler le coussin en assurant les étanchéités désirées.This cable gland 8 comprises two transverse perforated plates 8₁, 8₂ between which is interposed a cushion 8₃ made of elastomeric or similar material, and means suitable for bringing the two plates closer together, which causes the cushion to swell while ensuring the desired seals.

Ces moyens de rapprochement travaillent notamment par vissage, comprenant alors des écrous 9 accessibles depuis l'extérieur du bloc 6 et montés sur des tiges filetées 10 elles-mêmes fixées sur la plaque 8₂ la plus éloignée dudit bloc, la plaque 8₁ la plus proche de ce bloc étant maintenue écartée de celui-ci par des bagues d'écartement 11 entourant les tiges 10.These approximation means work in particular by screwing, then comprising nuts 9 accessible from outside the block 6 and mounted on threaded rods 10 themselves fixed on the plate 8₂ furthest from said block, the plate 8₁ closest to this block being kept apart from the latter by spacing rings 11 surrounding the rods 10.

La chambre A communique par un canal 12 avec une chambre B prévue à l'extérieur du bloc 6 et délimitée par un couvercle 13 appliqué jointivement contre ce bloc, par serrage de vis 14.Chamber A communicates by a channel 12 with a chamber B provided outside of block 6 and delimited by a cover 13 applied contiguously against this block, by tightening screws 14.

L'ensemble des deux chambres A et B est rempli à la fin de l'ancrage de tous les brins 1 sur le bloc 6 par une graisse ou matière analogue possédant simultanément les propriétés suivantes : souplesse, faible adhérence vis-à-vis des brins et de leurs extrémités dénudées, protection de ces extrémités contre la corrosion.The assembly of the two chambers A and B is filled at the end of the anchoring of all the strands 1 on the block 6 with a grease or similar material having simultaneously the following properties: flexibility, weak adhesion with respect to the strands and their bare ends, protection of these ends against corrosion.

Autour du manchon 7 ou du bloc 6 est rapportée, notamment par vissage le long de filetages complémentaires de ces deux éléments, une bague 15 propre à reposer elle-même axialement contre une portée annulaire 16 faisant partie d'une structure 17 d'ancrage du hauban, structure telle qu'un sommet de pylône ou qu'un massif au sol.Around the sleeve 7 or of the block 6 is added, in particular by screwing along complementary threads of these two elements, a ring 15 suitable for resting itself axially against an annular bearing 16 forming part of a structure 17 for anchoring the guy, structure such as a pylon top or a solid mass on the ground.

Les portions, des brins tendus 1, qui sont disposées en dehors de la boîte à graisse A,B, peuvent être parallèles entre elles et être directement mises à l'air libre.The portions, of stretched strands 1, which are arranged outside of the grease box A, B, can be parallel to each other and be directly exposed to the air.

On préfère toutefois les faire converger légèrement à partir du bloc 6, jusqu'à un point disposé à une distance généralement comprise entre 1 et 3 m du bloc, à l'aide d'un collier de guidage 19 situé en ce point : au-delà dudit point, les brins 1 sont rassemblés en un faisceau de brins jointifs, ainsi que visible sur les figures 1 et 3.However, it is preferable to make them converge slightly from block 6, to a point disposed at a distance generally between 1 and 3 m from the block, using a guide collar 19 located at this point: au- beyond said point, the strands 1 are combined into a bundle of contiguous strands, as can be seen in FIGS. 1 and 3.

Pour que le collier 19 puisse être facilement démonté, ce qui permet d'écarter mutuellement les divers brins 1, on le constitue avantageusement par deux demi-coquilles assemblables et séparables à volonté.So that the collar 19 can be easily disassembled, which makes it possible to separate the various strands 1 from each other, it is advantageously constituted by two half-shells which can be assembled and separated at will.

Le faisceau peut être laissé à l'air libre ou être lui-même protégé par une enveloppe 20 de toutes nature et dimensions désirables, par exemple en polyéthylène.The bundle can be left in the open air or be itself protected by an envelope 20 of any desired nature and size, for example made of polyethylene.

On voit encore :

  • sur la figure 1, un certain nombre de tubes et raccords dont certains présentent des tronçons tronconiques, reliant, les uns, tels que 22, le manchon 7 à l'enveloppe 20, et les autres 23,24,25, la portée 16 au pourtour de l'enveloppe 20,
  • et sur la figure 2, des douilles ou fourrures 26 en matière plastique, notamment en polyamide, interposées entre les portions dénudées des brins 1 et les alésages évidés dans le bloc 6 pour permettre les glissements relatifs, et une plaque perforée 27 traversée par les extrémités dénudées des brins et interposée axialement entre les embases élargies des douilles 26 et les cales 11.
We still see:
  • in FIG. 1, a certain number of tubes and fittings, some of which have frustoconical sections, connecting, some, such as 22, the sleeve 7 to the casing 20, and the others 23,24,25, the scope 16 at the periphery of the envelope 20,
  • and in FIG. 2, sockets or furs 26 made of plastic, in particular polyamide, interposed between the stripped portions of the strands 1 and the bores hollowed out in the block 6 to allow relative sliding, and a perforated plate 27 crossed by the ends stripped of the strands and interposed axially between the enlarged bases of the sockets 26 and the shims 11.

Il est à noter que les seuls contacts métal-métal réalisés entre chaque brin 1 et son environnement sont situés au niveau des ancrages individuels (mors 5 dans le cas illustré) : les autres éléments qui sont en contact avec ces brins sont les fourrures 26 et les coussins 8₃.It should be noted that the only metal-metal contacts made between each strand 1 and its environment are located at the level of the individual anchors (jaws 5 in the illustrated case): the other elements which are in contact with these strands are the furs 26 and 8₃ cushions.

Chaque brin peut donc être considéré comme totalement autonome sur toute sa longueur et peut être tendu ou détendu indépendamment de ses voisins.Each strand can therefore be considered completely autonomous over its entire length and can be stretched or relaxed independently of its neighbors.

Dans le cas où une telle détente individuelle de chaque brin 1 est envisagée, il pourra être utile de donner aux extrémités libres 21 (figure 2), de ces brins, qui font saillie au-delà des organes d'ancrage, une longueur plus grande que celle représentée, pour faciliter la prise de ces extrémités.In the case where such individual relaxation of each strand 1 is envisaged, it may be useful to give the free ends 21 (FIG. 2) of these strands, which protrude beyond the anchoring members, a greater length. than that shown, to facilitate the taking of these ends.

En suite de quoi, et quel que soit le mode de réalisation adopté, on dispose finalement d'un hauban dont la constitution et le montage résultent suffisamment de ce qui précède.As a result of which, and whatever the embodiment adopted, there is finally a guy wire whose constitution and assembly result sufficiently from the above.

Ce hauban présente un certain nombre d'avantages par rapport à ceux antérieurement connus et notamment les suivants :

  • chacun des brins individuels 1 qui composent le hauban peut être remplacé indépendamment des autres, c'est-à-dire alors même que tous les autres brins demeurent tendus, ce qui permet d'intervenir sur l'ouvrage équipé dudit hauban sans interrompre le fonctionnement de cet ouvrage, et en particulier le trafic s'il s'agit d'un pont,
  • le poids du hauban est relativement faible, vu la suppression des coulis ou autres liants durcis des réalisations antérieures,
  • la longévité du hauban est accrue, vu la suppression des risques de fissuration inhérents aux coulis et la grande qualité qui peut être conférée en usine aux gaines de protection individuelles des brins.
This guy has a number of advantages over those previously known and in particular the following:
  • each of the individual strands 1 that make up the shroud can be replaced independently of the others, that is to say even when all the other strands remain taut, which makes it possible to intervene on the structure equipped with said shroud without interrupting operation of this structure, and in particular the traffic if it is a bridge,
  • the weight of the shroud is relatively low, given the removal of grouts or other hardened binders from previous embodiments,
  • the longevity of the shroud is increased, given the elimination of the risks of cracking inherent in the grouts and the high quality which can be conferred in the factory to the individual protective sheaths of the strands.

Claims (2)

  1. Assembly consisting of a stay and its anchoring structure, the said stay being made up of a plurality of strands (1) themselves made up individually of sets of parallel or twisted metal wires, and the structure comprising a perforated block (6) onto which are anchored individually the bared ends of the different strands, an annular bearing area (16) against which the perimeter of the block is applied axially, and a sleeve (7) to which the said block is connected on the same side as the said bearing area, the chamber (A) formed inside this sleeve being filled with a material providing protection for the bared portions of the strands situated in this chamber, the different strands (1) being protected by sheathing (3) independently of each other, the protective sheath (3) on each strand (1) being interrupted at an end section (T) at a small distance from each extremity of this strand and the above chamber (A) containing the end sections (T) of the sheaths and being closed off sealingly, on the stay side, by a sealing device (8) with sheathed portions of the strands passing through it sealingly, characterized in that the protective material is a grease, and in the sealing device is a stuffing box comprising:
    - two perforated plates (8₁, 8₂), one "inner" of which (8₁) is arranged on the side of the above chamber (A) and the other "outer" of which (8₂) is arranged on the stay side,
    - a packing cushion (8₃) interposed between said two plates,
    - clamping rods (10) fixed to the outer plate (8₂), said rods passing freely, successively, through the perforated block (6) and through the inner plate (8₁) and being operable from the side, of the perforated block which is furthest away from the stay,
    - and rigid spacer rings (11) freely surrounding the clamping rods and interposed axially, directly or not, between the perforated block (6) and the inner plate (8₁).
  2. Assembly according to claim 1, characterized in that the clamping rods (10) are threaded rods and in that their control means are nuts (9) mounted on them and accessible from the outside of the perforated block (6).
EP88402934A 1987-11-25 1988-11-23 Stay cables and their anchorage Expired - Lifetime EP0323285B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88402934T ATE76139T1 (en) 1987-11-25 1988-11-23 STAY CABLES AND THEIR ANCHORING.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8716354A FR2623551B1 (en) 1987-11-25 1987-11-25 IMPROVEMENTS ON SURFACES AND THEIR COMPONENTS
FR8716354 1987-11-25

Publications (3)

Publication Number Publication Date
EP0323285A1 EP0323285A1 (en) 1989-07-05
EP0323285B1 EP0323285B1 (en) 1992-05-13
EP0323285B2 true EP0323285B2 (en) 1995-02-08

Family

ID=9357159

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88402934A Expired - Lifetime EP0323285B2 (en) 1987-11-25 1988-11-23 Stay cables and their anchorage

Country Status (8)

Country Link
EP (1) EP0323285B2 (en)
AT (1) ATE76139T1 (en)
DE (1) DE3871113D1 (en)
DK (1) DK167540B1 (en)
ES (1) ES2030888T5 (en)
FR (1) FR2623551B1 (en)
HK (1) HK158096A (en)
NO (1) NO171738C (en)

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US10889988B2 (en) 2013-08-01 2021-01-12 Dywidag-Systems International Gmbh Corrosion-protected tension member and plastically deformable disc of corrosion protection material for such a tension member

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FR2739113B1 (en) * 1995-09-26 1997-12-05 Freyssinet Int Stup INDIVIDUALLY PROTECTED STRAND FOR SUSPENDED CIVIL ENGINEERING STRUCTURE, STRUCTURE INCLUDING SUCH STRANDS, AND METHOD OF MANUFACTURE
FR2744467B1 (en) * 1996-02-06 1998-04-03 Freyssinet Int Stup SUSPENSION DEVICE FOR CIVIL ENGINEERING STRUCTURE AND CONSTRUCTION METHOD
ES2153269B1 (en) * 1998-01-16 2001-09-01 Dragados Obras Y Proyectos Tit SYSTEM OF ASSEMBLY OF SELF-PROTECTED CABLES IN THE BREAST OF BIRDS WITH EXTREME HEADS OF AMARRE.
FR2794484B1 (en) 1999-06-03 2001-08-03 Freyssinet Int Stup DEVICE FOR ANCHORING A STRUCTURAL CABLE
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FR2798410B1 (en) * 1999-09-15 2001-11-23 Freyssinet Int Stup ANCHORING DEVICE FOR ATTACHING A STRUCTURAL CABLE TO A CONSTRUCTION ELEMENT
FR2817566B1 (en) 2000-12-04 2003-02-07 Freyssinet Int Stup INDIVIDUALLY PROTECTED CORD, USE THEREOF IN CONSTRUCTION, AND MANUFACTURING METHOD
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DE20205149U1 (en) 2002-04-03 2002-07-04 Dywidag Systems Int Gmbh Corrosion-protected tension member, especially stay cable for a stay cable bridge
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PL2697447T3 (en) * 2011-04-15 2016-09-30 Method of protecting the end of a multi-tendon cable
EP2834418B1 (en) 2012-04-05 2020-07-22 Soletanche Freyssinet Seal for cable anchor device of a cable construction
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CN104314353B (en) * 2014-11-11 2016-05-04 国网河北饶阳县供电公司 The installation method of line of power sheath and this sheath
CN105064617A (en) * 2015-08-06 2015-11-18 江阴法尔胜住电新材料有限公司 Anchor device sealing structure of steel stranded wire stay cable
CN106400675B (en) * 2016-08-31 2018-08-03 中交一公局第三工程有限公司 A kind of steel anchor box and its installation method
CN107245940B (en) * 2017-08-11 2023-07-25 广西路桥工程集团有限公司 Device and method for sealing arch rib open holes of concrete filled steel tube arch bridge
CN108360379B (en) * 2018-01-08 2024-05-14 江苏法尔胜缆索有限公司 Corrosion-resistant and fatigue-resistant cable clamp structure for hot extrusion polyethylene cable with electrochemical protection
CN110258299B (en) * 2019-06-28 2024-02-06 柳州欧维姆机械股份有限公司 Tapered anti-slip key anchoring steel strand inhaul cable with fork lugs and construction method thereof
CN111894302A (en) * 2020-08-17 2020-11-06 哈尔滨工业大学 Cable dismantling device and method
CN114589462B (en) * 2022-03-02 2023-08-01 柳州欧维姆机械股份有限公司 Manufacturing method of bridge tie bar inhaul cable wire divider

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DE19833332C1 (en) * 1998-07-24 1999-12-16 Dyckerhoff & Widmann Ag Corrosion protected tension cable for building
DE20311950U1 (en) * 2003-08-02 2004-12-09 Dywidag-Systems International Gmbh Corrosion-protected tension member, in particular tendon for prestressed concrete
EP1505223A1 (en) 2003-08-02 2005-02-09 Dywidag-Systems International GmbH Corrosion protected tendon, especially for prestressed concrete
US10889988B2 (en) 2013-08-01 2021-01-12 Dywidag-Systems International Gmbh Corrosion-protected tension member and plastically deformable disc of corrosion protection material for such a tension member

Also Published As

Publication number Publication date
ES2030888T3 (en) 1992-11-16
ES2030888T5 (en) 1995-08-16
NO885238L (en) 1989-05-26
NO171738C (en) 1993-04-28
DE3871113D1 (en) 1992-06-17
EP0323285A1 (en) 1989-07-05
NO885238D0 (en) 1988-11-24
NO171738B (en) 1993-01-18
DK660988D0 (en) 1988-11-25
EP0323285B1 (en) 1992-05-13
HK158096A (en) 1996-08-30
DK167540B1 (en) 1993-11-15
FR2623551A1 (en) 1989-05-26
DK660988A (en) 1989-05-26
FR2623551B1 (en) 1992-04-24
ATE76139T1 (en) 1992-05-15

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