Process for the production of a component with very good mechanical properties, forming by deep-drawing, of rolled, in particular hot-rolled and coated steel sheet

IMPROVEMENTS IN CABLE ANCHORING DEVICES AND THEIR METHODS OF ESTABLISHMENT

L'INVENTION CONCERNE UN DISPOSITIF D'ANCRAGE POUR UN CABLE A BRINS MULTIPLES 2 COMPORTANT UN BLOC 1 DANS LEQUEL CES BRINS SONT ANCRES INDIVIDUELLEMENT PAR SERRAGE RADIAL AUTOUR DE CHAQUE BRIN D'UN MORS TRONCONIQUE FENDU 3 ENTOURANT CE BRIN ET LOGE DANS UN EVIDEMENT COMPLEMENTAIRE 4 DU BLOC. CE DISPOSITIF COMPREND UN ORGANE DE POUSSEE UNIQUE 6 DISPOSE AXIALEMENT EN REGARD DES DIFFERENTS MORS 3 ET UNE PLURALITE D'ENTRETOISES 10 INTERPOSEES AXIALEMENT CHACUNE ENTRE LEDIT ORGANE 6 ET UN MORS 3 AUTOUR DU BOUT DE BRIN 2 SERRE PAR CE MORS, LESDITES ENTRETOISES 10 ETANT IDENTIQUES ENTRE ELLES, CONSTITUEES EN UN METAL OU ALLIAGE DONT LA CARACTERISTIQUE DEFORMATIONCONTRAINTE PRESENTE UN LONG PALIER D'ECOULEMENT PLASTIQUE, ET DIMENSIONNEES DE FACON TELLE QU'A LA FIN DE LA POUSSEE LA DEFORMATION DE CHACUNE D'ELLES AIT ATTEINT, MAIS NON DEPASSE, LE STADE DE SON ECOULEMENT PLASTIQUE.

IMPROVEMENTS ON ANCHORING DEVICES FOR TENSIONED STRUCTURES

IMPROVEMENTS IN THE DISTRIBUTION ELEMENTS INTERPOSED BETWEEN THE FRETS AND THE BODIES FRETTED THEREWITH

POUR REPARTIR LA PRESSION EXERCEE PAR UN CABLE DE FRETTAGE 2, NOTAMMENT CONTENU DANS UNE GAINE 10 AVEC REMPLISSAGE DE GRAISSE, SUR UN CORPS TUBULAIRE 1, TEL QU'UNE CONDUITE FORCEE OU QU'UN SILO EN BETON, CEINTURE PAR CE CABLE, ON INTERPOSE ENTRE LEDIT CABLE ET LEDIT CORPS DES PATINS 3 CONSTITUES PAR DES TRONCONS D'UN PROFILE PLEIN EN CAOUTCHOUC QUI PRESENTENT LA FORME GENERALE D'UN C A OUVERTURE ETRANGLEE DEFINISSANT UN LOGEMENT CYLINDRIQUE 4 PROPRE A RECEVOIR JOINTIVEMENT LE CABLE ET QUI SONT DELIMITES, DU COTE OPPOSE A L'OUVERTURE DU C, PAR UNE FACE D'APPUI RECTANGULAIRE PLANE 6. TO DISTRIBUTE THE PRESSURE EXERCISED BY A FRETTORING CABLE 2, ESPECIALLY CONTAINED IN A SHEATH 10 WITH GREASE FILLING, ON A TUBULAR BODY 1, SUCH AS A FORCED PIPE OR A CONCRETE SILO, BELTED BY THIS CABLE, INTERPOSED BETWEEN SAID CABLE AND SAID BODY OF SKATES 3 CONSISTING OF SECTION OF A FULL RUBBER PROFILE WHICH PRESENT THE GENERAL FORM OF A STRANGED OPENING DEFINING A CYLINDRICAL HOUSING 4 OWN TO JOINTIVELY THE CABLE AND THAT IS DELIMITED AT THE OPENING OF THE C, BY A PLANE RECTANGULAR SUPPORT SIDE 6.

IMPROVEMENTS ON ANCHORING DEVICES FOR TENSIONED CABLES

ANCHORING DEVICE FOR A TWIST CABLE

SUSPENDED CIVIL ENGINEERING WORK AND CONSTRUCTION METHOD

DEVICES FOR REMOVING THE SOFT OF THE STRANDS IN A PRE-STRESS CABLE.

Il s'agit d'un dispositif pour mettre sous tension dans sa gaine (2) un câble de précontrainte composé de n torons (3), comprenant un bloc d'ancrage (4) percé par n alésages (5) garnis de n mors (6) fendus, eux-mêmes traversés par les torons. Il comprend en outre un vérin multiple (8) formant n sous-vérins à double effet composés chacun d'un cylindre (12) et d'un piston tubulaire (13) traversé avec jeu par un toron et des moyens (C, D, 16, 17) pour faire communiquer à volonté avec une même source de liquide sous pression (18) soit la totalité des chambres (A), des cylindres, disposées à une première extrémité axiale, soit la totalité des autres chambres (B), chaque piston portant un dispositif (19) propre à serrer automatiquement le toron associé lorsque le piston se déplace dans le sens de la mise sous tension du toron et au contraire à relâcher le toron pour le sens inverse. This is a device for putting under tension in its sheath (2) a prestressing cable made up of n strands (3), comprising an anchoring block (4) pierced by n bores (5) furnished with n jaws (6) split, themselves crossed by the strands. It further comprises a multiple cylinder (8) forming n double-acting sub-cylinders each composed of a cylinder (12) and a tubular piston (13) traversed with clearance by a strand and means (C, D, 16, 17) to communicate at will with the same source of pressurized liquid (18) either all of the chambers (A), of the cylinders, arranged at a first axial end, or all of the other chambers (B), each piston carrying a device (19) capable of automatically clamping the associated strand when the piston moves in the direction of tensioning of the strand and, on the contrary, of releasing the strand for the opposite direction.

Ready-to-assemble set of parts for barring a torrent to maintain a fixed level ford.

Ensemble prêt à monter, des pièces permettant de barrer un torrent pour maintenir un passage à gué à niveau fixe. L’invention s’applique à des torrents de montagne qui n’ont pas atteint leur profil d’équilibre et creusent leur lit à chaque crue, empêchant ainsi qu’un passage à gué stable permette de les traverser. L’ensemble est installé dans une tranchée provisoire et comporte des poteaux en forme de H (1) sur semelle, séparés par des madriers de mélèze non jointifs (9) et recouverts par une lierne de liaison (4) clavetée sur lesdits poteaux constituant la paroi verticale perméable de la structure. La tranchée étant remblayée sur ladite paroi installée on vient accrocher des tôles (3) constituant un déversoir qui projette l’eau du torrent vers l’aval et empêche l’affouillement au pied du dispositif. Cet équipement permet de conserver un niveau fixe au passage à gué, ce qui est l’objet de l’invention. Figure pour l’abrégé : Fig. 2 Ready-to-assemble set of parts for barring a torrent to maintain a fixed level ford. The invention applies to mountain streams which have not reached their equilibrium profile and dig their beds with each flood, thus preventing a stable fording from crossing them. The assembly is installed in a provisional trench and comprises H-shaped posts (1) on a sole, separated by non-contiguous larch planks (9) and covered by a connecting rod (4) keyed on said posts constituting the permeable vertical wall of the structure. Since the trench is backfilled on said installed wall, sheets (3) are attached, constituting a weir which projects the water from the torrent downstream and prevents scouring at the foot of the device. This equipment makes it possible to maintain a fixed level when fording, which is the object of the invention. Figure for the abstract: Fig. 2

Split taper collets for securing stranded cable - have helicoidal form and internal grooves corresponding to cable strands (BR 16.6.81)

A device for anchoring the end of a twisted-strand cable comprises a set of three 120-deg. split taper collets forming a truncated cone which is drawn into a cavity of similar form by the tension in the cable. The end side faces of the collets are radial helicoidal surfaces which correspond in pitch to that of the cable strands. The internal surface has helical grooves with the same pitch, but slightly smaller radius than the cable strands. The collets are pref. formed from sintered metallic powder, giving an irregular surface with improved grip on the cable. The assembled collets can be driven along the cable by a bearing bush which allows them to rotate and screw themselves along the cable strands.

IMPROVEMENTS TO ANCHORING DEVICES FOR TENSILE CABLES

IL S'AGIT D'UN DISPOSITIF D'ANCRAGE POUR CABLE TENDU 1, COMPORTANT UNE PLAQUE D'APPUI 5, UNE PORTEE SPHERIQUE CONVEXE 7 SOLIDAIRE DE LA TETE D'ANCRAGE 2 DU CABLE ET PROPRE A COAGIR AVEC UNE PORTEE ANNULAIRE 8 DE LA PLAQUE, ET UN VERIN DE TRACTION 11 DISPOSE AUTOUR DE LA TETE D'ANCRAGE. CE DISPOSITIF COMPORTE EN OUTRE UN EPAULEMENT ANNULAIRE 9 RAPPORTE SUR L'EXTREMITE LIBRE DE LA TETE D'ANCRAGE ET DELIMITE DU COTE DE LA PLAQUE PAR UNE SECONDE PORTEE SPHERIQUE CONVEXE 10 CONCENTRIQUE A LA PREMIERE 7 ET LE VERIN 11 EST INTERPOSE ENTRE LA PLAQUE 5 ET L'EPAULEMENT 9 ET COMPORTE UNE PORTEE SPHERIQUE CONCAVE 14 PROPRE A COAGIR JOINTIVEMENT AVEC LA PORTEE SPHERIQUE CONVEXE 10 DE L'EPAULEMENT DE FACON A RENDRE POSSIBLE UN GLISSEMENT SOUS CHARGE DE CET EPAULEMENT PAR RAPPORT AU VERIN. THIS IS AN ANCHORING DEVICE FOR TENSIONED CABLE 1, INCLUDING A SUPPORT PLATE 5, A CONVEX SPHERICAL REACH 7 JOINT WITH ANCHORING HEAD 2 OF THE CABLE AND CLEAN TO ACT WITH AN ANNULAR REACH 8 OF THE PLATE, AND A TRACTION CYLINDER 11 HAS AROUND THE ANCHORING HEAD. THIS DEVICE FURTHER INCLUDES AN ANNULAR SHOULDER 9 RELATED TO THE FREE END OF THE ANCHORING HEAD AND LIMITATION OF THE SIDE OF THE PLATE BY A SECOND SPHERICAL RANGE CONVEX 10 CONCENTRIC TO THE FIRST 7 AND THE CYLINDER 11 IS INTERPOSED BETWEEN PLATE 5 AND THE SHOULDER 9 AND INCLUDES A CONCAVE SPHERICAL RANGE 14 CLEAN TO COACT JOINTLY WITH THE CONVEX SPHERICAL RANGE 10 OF THE SHOULDER SO AS TO MAKE POSSIBLE A SLIDING UNDER LOAD OF THIS SHOULDER IN RELATION TO THE CYLINDER.

IMPROVEMENTS TO PROCESSES FOR REHABILITATING SUSPENDED BRIDGES AND TO BRIDGES THUS REHABILITED

A method for rehabilitating a suspension bridge including a deck (1) and at least two towers (2) supporting two parallel suspension cables from which said deck is suspended via hangers, the ends of each suspension cable being anchored in an anchorage (4). For this purpose, two guy supporting constructions (7) are mounted on each tower, angled guy webs (8) that are symmetrical in pairs relative to said tower and stretched between said constructions and the deck are positioned on either side of each tower in order to replace the two series of hangers located between the tower in question and the adjacent anchorage, as well as the two series of hangers that are symmetrical to the two above-mentioned series relative to the tower, two new suspension cables (11) that are much weaker than the original cables are positioned on the towers, and the central portion of the deck is suspended from said new suspension cables by means of hangers (12).

METHOD FOR MAKING A PART WITH VERY HIGH MECHANICAL CHARACTERISTICS, SHAPED BY STAMPING, FROM A STRIP OF LAMINATED AND IN PARTICULAR HOT ROLLED AND COATED STEEL SHEET

IMPROVEMENTS IN PROCESSES AND DEVICES FOR PRE-STRESSING CONCRETE STRUCTURES AND THE CORRESPONDING STRUCTURES

Improvements to the devices for holding the multiple strands constituting a stay cable juxtaposed laterally.

Improvements to frustoconical anchoring jaws for cables and to the methods by which they are used

The invention relates to a device intended for anchoring a cable in a retention block which has a recessed seat which is at least partly frustoconical, this device comprising a slotted frustoconical jaw (4) consisting of a number of wedge elements (41, 42, 43) which are intended to be arranged around the cable in the recessed seat of the retention block, and to cooperate with this recessed seat in order to clamp the cable after it has been tensioned. According to the invention, this device additionally comprises an insert (5) which is made of a material different from that of the jaw and which is designed to be interposed between the jaw and the cable by adhering to the jaw and to the cable. Thus, the characteristics of friction of the insert on the cable are independent of the material of the jaw, which fact makes it possible in particular to fix very hard cables, or cables subjected to very great dynamic stresses, depending on the material used for the insert.

Construction of suspended bridges or roofs with two masts

The construction has two or more masts (2), a load bearing cable (3) extending between two anchor points (5) on the ground and supported by the masts. The structure (1) is suspended from the load bearing cable by suspension rods (4), each attached to a ring (A1-An etc.) clamped around the cable (3). Each clamping ring is subjected to a load by its suspension rod which is tangential to the load bearing cable (3). To reduce this load there are one or more smaller, linking cables (10, 11, 12) with sections which extend to between clamping rings (A1 etc.). These sections are attached rigidly to the mast and the clamping rings and are successively less tensioned the further they are from the mast. The linking cable exercises a compensating force on the clamping rings to which is attached which partially compensates for the tangential load on the clamping rings. Pref. the cable (3) has a sheath (9) of high density polyethylene.

Anchoring jaw for tensioned cable e.g. in civil engineering structures

The anchoring jaw consists of a number of wedging keys (6, 7) in the form of angular sectors around a cylindrical channel (8) containing the tensioned cable, the keys being shaped so that the jaw has a symmetry of revolution about the axis of the channel in a first zone but no symmetry of revolution in a second zone. The inner surface of each key has the general shape of a cylindrical sector, while its outer surface is in the form of a truncated conical sector of varying shape.

Fastening system for load transmitter on cable e.g. of suspension bridge

The fastening system consists of a collar made from two shells (10a, 10b), at least one of which has a connector (15) for a load transmitter fitted round a cable made from tensioned strands in a deformable matrix. The shells are clamped on the cable by means of elongated rods (17) which have a longitudinal elastic deformation capacity at least five times greater than the maximum compassion of the cable matrix. Each rod is located in a tube (18a, 18b) filled with petroleum wax, grease or resin.

Cable deviation saddle for civil engineering structure has separate conduits for strands formed by offset plates with holes

The deviation saddle for a cable (4) made up of n strands (8) has a series of n guide ducts (12, 14), at least some of which are curved, formed by holes in successive plastic plates (11, 13) inside a metal sleeve (9). Adjacent plates are in mutual contact, with the holes in one plate leading to the holes in the next, and curved ducts are produced by having the holes with flared ends in successive plates offset relative to one another by less than 4 degrees.

Steel cable with individually protected strands for suspended systems

The steel cable consists of strands made from twisted steel wires (7) inside an outer sleeve (9) of a flexible plastic. The wires are fitted inside the sleeve with spaces which are filled with a protective material (8). The sleeve (9) is made from a plastic selected from polyolefins and polyamides, such as high-density polyethylene, and the protective filler is an elastomer such as polybutadiene. The cable strand is made by coating the steel wires in the protective material, leaving no gaps between them. The outer surface of the protective material is coated with an agent which enables it to adhere to the outer sleeve by chemical interaction. The adhesive agent is, for example, from ethylene - acrylic ester - maleic anhydride terpolymers of polyethylenes.

Cotter pin anchorage for prestressed reinforcement cable - has truncated pins wedging into truncated cavity in anchor block

The cable anchor resists fatigue due to varying forces and has three pins (2) forced into a truncated cavity (3) in an anchor block (4). The exterior surfaces of the pins are smooth and machined as exactly as possible to the same angle as that of the smooth cavity. The thin end of the pins is entirely housed in the cavity which extends beyond the pins and the internal pin faces are roughened over their full length to grip the reinforcement (1).

Stay cables and their anchorage

DEVIATION SADDLE FOR CABLE AND CIVIL ENGINEERING STRUCTURE COMPRISING SUCH A DEVIATION SADDLE

Distribution elements placed between bindings and the bodies bound thereby

For distributing the pressure exerted by a binding cable (2), more especially contained in a sheath (10) with a grease filling, over a tubular body (1), such as a forced duct or a concrete silo, surrounded by this cable, there are inserted between said cable and said body shoes (3) formed by sections of a solid shaped bar of rubber which have the general shape of a C with constricted opening defining a cylindrical groove (4) adapted for jointingly receiving the cable and which are defined, on the side opposite the opening of the C, by a flat rectangular bearing face (6).

DEVICE CONSISTING OF A BARDUNE AND ITS ANCHORING CONSTRUCTION

Prestress conduits

To manufacture a bent prestress conduit (5) adapted to receive without damage cables (7) subjected to extremely high pulling forces, one of the faces of a metal strip (1) is coated intimately with a metal phosphate layer (4) itself covered by a soap and this metal strip is wound in helical form so as to obtain a continuous tube whose inner face is formed by the thus coated face of the metal strip.

Improvements to processes and devices for prestressing concrete by post-tensioning

Il s'agit de mettre en précontrainte un ouvrage en béton 1 à l'aide de câbles traversant cet ouvrage et mis sous tension postérieurement au durcissement du béton, chaque câble étant constitué par une pluralité de torons métalliques dénudés 3 contenus dans une même gaine étanche 2 avec interposition d'une cire de protection 16 n'adhérant pratiquement pas à ces torons, chaque toron étant lui-même composé par un faisceau de fils. On injecte la cire à l'état liquéfié dans la gaine mise en place au sein du béton durci et garnie de ses torons, mais avant mise sous tension de ces torons, l'étanchéité au niveau des traversées d'un couvercle terminal 4 de la gaine par les torons étant assurée par des presse-étoupe 10, 13 et par réfrigération locale de la cire présente dans les petits canaux formés entre les fils des torons, et l'on met les torons sous tension après remplissage de la gaine par la cire et solidification de celle-ci.

IMPROVEMENTS IN PROCESSES AND DEVICES FOR PRE-STRESSING CONCRETE BY POST-TENSION

Prestressing ducts and methods for their manufacture

To manufacture a bent prestress conduit (5) adapted to receive without damage cables (7) subjected to extremely high pulling forces, one of the faces of a metal strip (1) is coated intimately with a metal phosphate layer (4) itself covered by a soap and this metal strip is wound in helical form so as to obtain a continuous tube whose inner face is formed by the thus coated face of the metal strip.

Anchoring device for tensioned cables

1. An anchorage for a tensioning cable (1), comprising a bearer plate (5), a convex spherical bearing surface (17) forming part of the anchoring head (2) of the cable and adapted to co-operate with an annular bearing surface (8) of the bearer plate, and a draw jack (11) arranged to surround the anchoring head, characterised in that it further includes an annular shoulder piece (9) carried on the free end of the anchoring head and located with respect to the bearer plate by a second convex spherical bearing surface (10) concentric with the first mentioned said surface (7), and in that the jack (11) is interposed between the bearer plate (5) and the shoulder piece (9) and has a concave sphérical bearing surface (14) adapted to co-operate in the manner of a joint with the convex spherical bearing surface (10) of the shoulder piece, whereby to allow the shoulder piece to slide under load with respect to the jack.

Anchorage for stressed reinforcements

1. Anchoring device for a tensioned cable (1), which comprises a longitudinally split jaw (3) having a rough inner cylindrical surface (7), particularly striated, and an outer lateral surface of frustoconic shape, which jaw surrounds one end of the cable and which cooperates with a complementary housing (4) hollowed in a rigid part (5), this housing being dimensioned so that it surrounds contiguously the totality of the tapered end of the jaw, the half-angle (A) at the apex of the outer lateral surface, of frustoconic shape, of the tapered end of the jaw being less than 10 degrees, characterized in that the radical thickness (E) of the annular terminal section of said tapered end is less than or equal to 1/10 of the inner radius (R) of this end.

Process for producing a piece with very high-level mechanical characteristics, formed by drawing, from a strip of laminated steel plate, hot rolled and coated

Procédé de réalisation d'une pièce à très hautes caractéristiques mécaniques, mise en forme par emboutissage, à partir d'une bande de tôle d'acier laminée, et revêtue de zinc ou en alliage à base de zinc assurant une protection de la surface et de l'acier, caractérisée en ce que: - on découpe la tôle pour l'obtention d'un flan de tôle, - on effectue un emboutissage à chaud, à partir du flan de tôle pour obtenir la pièce, - on réalise, avant emboutissage, un composé allié intermétallique, en surface, assurant une protection contre la corrosion, contre la décarburation de l'acier, le composé intermétallique pouvant assurer une fonction de lubrification, ledit composé étant obtenu par transformation du revêtement en un alliage intermétallique par une élévation de température supérieure à 700°C, - on retire par découpage, les excédents de tôle nécessaires à l'opération d'emboutissage. Process for producing a part with very high mechanical characteristics, shaped by stamping, from a strip of rolled steel sheet, and coated with zinc or a zinc-based alloy ensuring surface protection and steel, characterized in that: - the sheet is cut to obtain a sheet blank, - a hot stamping is carried out, from the sheet blank to obtain the part, - before stamping, an intermetallic alloy compound, on the surface, providing protection against corrosion, against decarburization of steel, the intermetallic compound being able to provide a lubrication function, said compound being obtained by transformation of the coating into an intermetallic alloy by elevation with a temperature above 700 ° C, - the excess sheet necessary for the stamping operation is removed by cutting.

Method for manufacturing a body featuring very high mechanical properties, forming by drawing from a rolled steel sheet, in particular hot rolled and coated sheet

Procédé de réalisation d'une pièce à très hautes caractéristiques mécaniques, mise en forme par emboutissage, à partir d'une bande de tôle d'acier laminée, notamment laminée à chaud et revêtue d'un métal ou d'un alliage métallique assurant une protection de la surface et de l'acier, caractérisée en ce que : on découpe la tôle pour l'obtention d'un flan de tôle, on effectue un emboutissage, à partir du flan de tôle pour obtenir la pièce, on réalise, avant ou après emboutissage, un composé allié intermétallique, en surface, assurant une protection contre la corrosion, contre la décarburation de l'acier, le composé intermétallique pouvant assurer une fonction de lubrification, on retire par découpage, les excédents de tôle nécessaires à l'opération d'emboutissage.

IMPROVEMENTS TO PROCESSES FOR REHABILITATING SUSPENDED BRIDGES AND TO BRIDGES THUS REHABILITED

Individually protected strand for suspended civil engineering structures, structures having such strands and method for manufacturing it

Improvements to devices for connecting prestressing cables together

The invention relates to a device for connecting together, end to end, two cables 4 and 12 with a plurality of strands 5 and 11 which are capable for generating respectively prestressing forces on two concrete sections 1 and 13 made in succession and forming part of an "advancing" construction, comprising a perforated disc 21 serving as an anchoring means for the strands 5 of the primary cable 4, a ring notched radially at 10 serving as an anchoring means for the strands 11 of the secondary cable 12 and a load-transferring sleeve 20 inserted axially between the disc and the first section 1. The sleeve 20 comprises a distributing footing 19 which bears directly against the concrete 2 making up the primary section 1 and is sufficiently wide to distribute, by itself, the prestressing force in this concrete.

ANCHORING A TIGHT CABLE

1. An anchorage for a tensioning cable (1), comprising a bearer plate (5), a convex spherical bearing surface (17) forming part of the anchoring head (2) of the cable and adapted to co-operate with an annular bearing surface (8) of the bearer plate, and a draw jack (11) arranged to surround the anchoring head, characterised in that it further includes an annular shoulder piece (9) carried on the free end of the anchoring head and located with respect to the bearer plate by a second convex spherical bearing surface (10) concentric with the first mentioned said surface (7), and in that the jack (11) is interposed between the bearer plate (5) and the shoulder piece (9) and has a concave sphérical bearing surface (14) adapted to co-operate in the manner of a joint with the convex spherical bearing surface (10) of the shoulder piece, whereby to allow the shoulder piece to slide under load with respect to the jack.

TENSION CABLE WITH ANCHORING.

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>

Cable anchoring devices and their manufacturing methods

The invention provides an anchorage device for a cable with multiple strands (2) comprising a block (1) in which the strands are anchored individually by radially clamping about each strand a split truncated cone shaped jaw (3) surrounding this strand and housed in a complementary housing (4) of the block. This device comprises a single thrust member (6) disposed axially opposite the different jaws (3) and a plurality of spacers (10) each interposed axially between said member (6) and a jaw (3) about the strand end (2) clamped by this jaw, said spacers (10) being identical to each other, formed from a metal or an alloy whose deformation/stress characteristic has a long plastic flow plateau and dimensioned so that at the end of the thrust the deformation of each of them has reached, but not exceeded, the plastic flow stage thereof.

IMPROVEMENTS ON BRIDGE BRIDGES AND MORE ESPECIALLY THEIR PYLONES AND BRIDGES

IMPROVEMENTS IN PROCESSES AND DEVICES FOR PRE-STRESSING CONCRETE STRUCTURES AND THE CORRESPONDING STRUCTURES

The invention relates to a concrete work prestressed by means of tensioned reinforcements (7) having bell shaped ends (71) and formed from an alternate succession of first sections housed, with interposition of an injected cement, in metal sheaths (9) themselves embedded in the concrete and rectilinear sections outside the concrete. For easy replacement of these reinforcements, the first sections have a rectilinear or curved shape of an arc of a circle and they are housed in plastic material tubes (10) adapted to slide against the metal, the tube ends situated at the level of the bell mouthed reinforcement ends (71) being themselves given the shape of open mouthed sleeves (11) made from plastic material.

Method and device for fixing a load-transmitting element on a cable, and cable-suspended bridge comprising said devices

Le dispositif comprend un collier formé de deux coquilles (10a, 10b), prévu pour la liaison avec l'élément transmetteur de charge. Le câble comporte un ensemble de brins tendus contenus, au droit du collier dans une matrice comblant les interstices entre les brins. Cette matrice est, en totalité ou en partie, en une matière de plastique susceptible de fluer sous l'action du serrage du collier. Le serrage est exercé au moyen d'éléments de forme allongée (17) transmettant un effort de serrage aux coquilles du collier. Ces éléments de forme allongée sont contraints de façon à présenter une déformation élastique longitudinale très supérieur au tassement maximal par fluage de la matrice. On évite ainsi des deserrages intempestifs du collier.

Improvements to prestressing devices or the like comprising ties

In a prestressing device intended to continuously stress two spans 3 of a same rigid structure 1 towards each other by means of a tie 2 anchored on these two spans, the tie consists of at least two superimposed parallel flat strips 4 made of a material with a very high tensile strength, the ratio between the width and the thickness of this strip being greater than 10, and each anchoring member for such a strip comprises a rigid span 3 through which the said tie passes, a rigid plate 6 which has a central portion inserted contiguously between the two strips and two end portions protruding transversely and bearing on the rigid span, and means 7-9 capable of strongly clamping the two strips against the rigid plate in the direction perpendicular to the plate.

Devices for stressing tendons before anchoring

For stressing the second end of a tendon (1) whose first end is already anchored on a first bearing surface of a rigid structure (5), with a view to anchoring this second end on a second bearing surface (3) of the said structure after stressing of the said tendon, use is made of a device comprising a longitudinal stressing jack (V1) whose stationary element (9) is capable of bearing on the second bearing surface (3), a first temporary clamping jaw (30) of the above second end, which jaw is integral with the axially movable element (10, 11) of the jack, and a second temporary clamping jaw (20) of the abovementioned second end, which jaw is integral with the fixed element (9) of the jack. The two jaws work in succession in order to grip the tendon to be stressed during the to-and-fro action of the stressing jack and the clamping pressure of their jaws (32, 22) is applied to the tendon in exclusively transverse directions. <IMAGE>

Method and device for fixing a load-transmitting element on a cable, and cable-suspended bridge comprising said devices

TORO INDIVIDUALLY PROTECTED FOR CIVIL ENGINEERING WORK SUSPENDED WORK THAT INCLUDES THESE TOROS AND MANUFACTURING PROCESS

Individually protected strands for hanging structures, structures with these strands and manufacturing processes

TENSION CABLE ANCHORING DEVICE.

METHOD AND DEVICE FOR FASTENING A LOAD-TRANSFERING ELEMENT ON A ROPE, AND SUSPENSION BRIDGE HAVING SUCH DEVICES

Method and apparatus for attaching a load-carrying element to a cable, and suspension bridges including such devices

Verfahren zum herstellen eines bauteils mit sehr guten mechanischen eigenschaften, umformung durch tiefziehen, aus gewalztem insbesondere warmgewalztem und beschichtetem stahlblech

Verfahren zum herstellen eines bauteils mit sehr guten mechanischen eigenschaften, umformung durch kaltes tiefziehen aus gewalztem, insbesondere warmgewalztem und beschichtetem stahlblech

Vorspannvorrichtungen fuer beton mit sinuskurvenfoermigem spannkabel und verfahren zur anwendung.

Individuell geschützte litze für hängende bauwerke, bauwerke mit diesen litzen und herstellungsverfahren

Ankervorrichtungen fuer kabel.

Perfectionnements aux dispositifs d'ancrage des cables

Un dispositif pour ancrer un câble tendu 2, 4 sur une portée traversée par ce câble comprend un corps en U 8 propre à chevaucher un tronçon du câble, corps dont les ailes sont prolongées par des rebords 9 dirigés l'un vers l'autre, et une cheville 12 propre à être logée dans l'ouverture en U dudit corps de façon à prendre appui contre les rebords de ses ailes, l'ensemble du corps et de la cheville étant dessiné de façon à définir un logement tronconique pour un mors tronconique fendu 14 connu en soi, propre à serrer le susdit tronçon.

Ankervorrichtungen fuer kabel.

Perfeccionamientos en los dispositivos de anclaje de cables.

UN DISPOSITIVO PARA ANCLAR UN CABLE TENDIDO (2, 4) SOBRE UN ALCANCE ATRAVESADO POR ESTE CABLE, CONTIENE UN CUERPO EN U (8) PROPIO A SUPERPONERSE SOBRE UN TRAMO DE UN CABLE, CUERPOS CUYAS ALAS SE PROLONGAN POR REBORDES (9) DIRIGIDOS EL UNO HACIA AL OTRO, Y UN TARUGO (12) QUE SE ALOJA EN LA ABERTURA EN U DE DICHO CUERPO DE MANERA A TOMAR APOYO CONTRA LOS REBORDES DE SUS ALAS, EL CONJUNTO DEL CUERPO Y DEL TARUGO DEFINEN UN ALOJAMIENTO TRONCOCONICO PARA UNA PIEZA TRONCOCONICA FUNDIDA (14) QUE ENCIERRA DICHO TRAMO.