EP0340051A1 - Bridge floor for long span bridge - Google Patents

Bridge floor for long span bridge Download PDF

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Publication number
EP0340051A1
EP0340051A1 EP19890400731 EP89400731A EP0340051A1 EP 0340051 A1 EP0340051 A1 EP 0340051A1 EP 19890400731 EP19890400731 EP 19890400731 EP 89400731 A EP89400731 A EP 89400731A EP 0340051 A1 EP0340051 A1 EP 0340051A1
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EP
European Patent Office
Prior art keywords
bridge
beams
auxiliary
deck
diagonal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP19890400731
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German (de)
French (fr)
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EP0340051B1 (en
Inventor
Jean Muller
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Societe Centrale dEtudes et de Realisations Routieres Scetauroute
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Societe Centrale dEtudes et de Realisations Routieres Scetauroute
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Priority to AT89400731T priority Critical patent/ATE73187T1/en
Publication of EP0340051A1 publication Critical patent/EP0340051A1/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
    • E01D11/00—Suspension or cable-stayed bridges
    • E01D11/04—Cable-stayed bridges
    • 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
    • E01D2/00—Bridges characterised by the cross-section of their bearing spanning structure
    • E01D2/04—Bridges characterised by the cross-section of their bearing spanning structure of the box-girder type
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D2101/00—Material constitution of bridges
    • E01D2101/20—Concrete, stone or stone-like material
    • E01D2101/24—Concrete
    • E01D2101/26—Concrete reinforced
    • E01D2101/28—Concrete reinforced prestressed
    • E01D2101/285—Composite prestressed concrete-metal

Definitions

  • the present invention relates to a bridge, in particular to a long span bridge, of the guyed type, and capable of carrying a large amount of traffic thanks to the presence of roadways located in superimposed planes, one of them being used for example for railways, and the other for automobile traffic.
  • suspension bridges In the current state of the art, the crossing of large spans uses either suspension bridges or cable-stayed bridges.
  • Suspension bridges are economically justified for exceptional spans, but their flexibility poses problems for traffic, especially rail, and for aeroelastic stability.
  • Cable-stayed bridges for their part, do not exhibit the wind sensitivity of suspension bridges, particularly if the deck is constructed of concrete, a material which gives the structure sufficient weight and great rigidity. The weight, however, limits the spans, so that beyond the field of application of concrete cable-stayed bridges, aprons with a mixed steel / concrete structure or entirely metallic aprons have been used.
  • guyed decks with a mixed steel / concrete structure have always consisted of an upper concrete member forming a paving slab, carried by transverse and longitudinal stiffening beams intended for transferring the loads to the guy wires. while ensuring sufficient rigidity to the deck.
  • Lattice structures can also be used, because they make it possible to economically obtain high bending and torsional rigidity, while ensuring maximum transparency with respect to the wind.
  • such trellis structures generally combine steel and concrete, but despite significant research in this field, no really satisfactory solution has been found to transfer the forces between the members and the diagonals at the different nodes of the trellis. The long-term behavior of such solutions is unknown and cost prices remain high.
  • the object of the invention is to overcome all the drawbacks mentioned above, by proposing a new structure which is both light, rigid, and easy to produce, therefore economical.
  • the invention provides, to obtain this result, a bridge consisting of an apron and means for supporting this apron, the apron comprising: - an upper chord forming a circulation slab, - a lower member forming a circulation slab, narrower than the upper member, - prestressed connecting beams, called “diagonals", directed obliquely both with respect to the vertical and with respect to the length of the bridge, and connecting the edges of the upper and lower members, - the auxiliary connecting beams, also prestressed, located roughly in vertical planes passing through the edges of the internal frame, these auxiliary beams making with the diagonals and the frames a spatial trellis, of great rigidity, this bridge having the particularity that the prestressing cable or cables of a diagonal beam are anchored to the edge of the upper member, cross transversely the lower member, then the diagonal beam which is symmetrical with respect to the longitudinal vertical plane of symmetry of the bridge , to come to anchor on the opposite edge of the upper chord.
  • the prestressing cable or cables of an auxiliary beam are also anchored in the upper chord, cross the lower chord transversely, pass through the auxiliary beam which is symmetrical with respect to the longitudinal vertical plane of symmetry of the bridge, and return s 'anchor on the upper chord.
  • the auxiliary beams are located at the intersection of the vertical planes parallel to the axis, and of plane perpendicular to these vertical planes and containing the diagonal beams. An optimal distribution of forces is thus obtained.
  • the upper member is formed of a thin slab, stiffened by transverse beams located at the point where the diagonal beams and possibly the auxiliary beams join said upper member.
  • the lower member is of the metallic type with longitudinal caissons, with concrete blocks to ensure the connection with the prestressing cables of the diagonal and auxiliary beams.
  • the lower member is formed of precast concrete elements, assembled in the longitudinal direction.
  • the choice between these two solutions is, essentially, a matter of weight is cost.
  • the upper deck When the bridge according to the invention is of the fan-guyed type, provision may be made for the upper deck to be formed by assembling prefabricated or cast elements in place, at least some of which carry a stop intended to retain the anchoring head d 'a shroud, and the adjacent element carries an auxiliary stop intended to come into abutment on the stop retaining the anchor head of the stay, this auxiliary stop being intended to retain the anchor head of a longitudinal prestressing cable of the apron, exerting a force directed longitudinally in the opposite direction of the shroud, so that the combined action of the shroud and the prestressing cable tends to clamp the two prefabricated elements against each other.
  • the bridge according to the invention is of the fan guyed type with at least one inverted V pylon to support the guy wires
  • the bridge according to the invention comprises an apron 1, suspended from guy lines 2, at regularly spaced points, these guy lines are fixed towards the top of the support mast, or pylon, 3.
  • the central span is shown with only eight elements, suspended by three guy wires on either side of the key.
  • the spacing of the shrouds is variable from 10 to 20 meters, and the number of shrouds in the central half-span can reach twenty to twenty five.
  • the deck comprises an upper chord 4, forming a roadway, and a lower chord 5, which forms a second roadway. These two members are connected by connecting beams oriented obliquely, 6, 7, better visible in the following figures.
  • FIG. 2 shows an embodiment of the deck which comprises, on its lower member, a carriageway with two lanes of traffic in each direction, and, on the lower member, a railway track.
  • Figure 3 shows another embodiment of the deck, for higher traffic, comprising, on the upper frame, pavements with three lanes of traffic in each direction, and, on the lower frame, three metro lines.
  • the bridge is of the type in which the shrouds 2 form an axial vertical ply, or two adjacent vertical plies, supporting the deck by its central part.
  • the guy wires support the deck by its edges.
  • connecting beams In the two figures, the arrangement of the connecting beams is the same: diagonal connecting beams connect the edges of the two members, and auxiliary beams 7 connect the edge of the lower member to the upper member while remaining in an axial vertical plane .
  • auxiliary beams 7 connect the edge of the lower member to the upper member while remaining in an axial vertical plane .
  • the upper frame 4 is formed of a relatively thin slab 11, reinforced by transverse beams 12, located at its lower part and which carry hooking means 13 of the shrouds.
  • the lower chord 5 is, in the case of these figures, a metallic structure comprising longitudinal border boxes 14 and central 15.
  • the diagonal connecting beams 6 are hollow metal beams, which bear on the one hand on a lateral box 14 of the lower member, and on the other hand on a fitting 16 secured to the transverse beam 12.
  • the prestressing cables 17 of the diagonal connecting beams are anchored on the one hand on the edge 18 of the upper slab 13. They successively pass through a diagonal beam 6, the boxes 14 and 15 of the lower member, in a plane transverse to to the bridge, and another diagonal beam 6 to hang on the opposite edge 18 of the slab 13.
  • the prestressing cables 19 of the auxiliary beams pass, similarly, successively through a connecting beam 7, the boxes 14 and 15 of the lower member, and the connecting beam 7. They are anchored, at their two ends, to the face top of beam 12.
  • Figure 5 is an enlarged partial view of Figure 2, to better show the structure of the lower deck.
  • the boxes 14 have, on their edges, oblique surfaces 20, perpendicular to the diagonal connecting beams 6, and on which these come to bear.
  • an auxiliary box 21 which widens downwards towards the center of the frame, serves as a support for the auxiliary beam 7.
  • the boxes are closed by oblique transverse partitions 20, of inclination relative to the horizontal identical to that of the connecting beams.
  • the space in V cross section, defined by these two oblique transverse partitions 20, is filled with concrete 21, and contains the tubes 22 and 23 in which are placed the prestressing cables, respectively 17 and 19, for the transmission of the prestressing tension at the lower chord. It is in the tubes 22 and 23 that the change of direction of the prestressing cables 17, 19 takes place.
  • These cross perpendicularly the longitudinal partitions 24 which separate the lateral boxes 14 from the central boxes. traux 15. As can be seen in FIG. 5, these partitions 24 are placed to the right of the rails of the railway track.
  • Figures 7 and 8 are cross sections of a variant, in which the lower chord consists of an assembly of precast concrete elements 30, arranged longitudinally one after the other, as shown in the figure 3.
  • the elements 30 comprise a flat slab 31, which carries on its lateral edges a thickened rib 32, which in particular serves as a support for the diagonal 6 and auxiliary 7 connection beams, the latter coming to bear on the element 30 by the intermediate of a box 33, identical to the box 21 described with reference to FIGS. 7 and 8.
  • the successive elements 30 join together at the place where the connecting beams 6 and 7 hang. At their end, the elements 30 carry a lower reinforcement 34, the elements 34 coming to bear against one another at their lower end, and leaving between their upper part an empty space 35, roughly V-shaped, which is subsequently filled with concrete.
  • the tubes 36, 37 which contain and guide the prestressing cables 17 and 19 pass through the ends of the slabs 31 and through the reinforcements 34, to transmit the prestressing forces to the blocks 30.
  • Figure 9 shows a detail of the upper chord, which, like the lower chord of Figures 3, 5 and 6, is formed by an assembly of concrete elements, prefabricated or cast in place, resting on each other in the longitudinal direction.
  • Two elements 40, 41 are represented by their ends.
  • the element 40 carries a small block 42, which is used for anchoring a guy 43, which crosses the slab.
  • a second anchor block 43 facing it on the element 41. It is used for anchoring a prestressing cable 44, arranged longitudinally.
  • the two blocks 42, 43 have vertical, transverse surfaces, 45, 46, by which they come to bear one on the other. The tension of the shroud 3 and of the prestressing cable 44 therefore tends to keep them firmly in support.
  • Another longitudinal prestressing cable has been shown at 47, which crosses the junction of the elements 40 and 41, and will be anchored on elements located further in the longitudinal direction of the bridge, so as to ensure the rigidity of the assembly. of the upper chord.
  • the member has stops, the shape of which can correspond to that of the two solid masses 43 and 43 assembled, these stops each retaining the anchor head of a stay and at the same time retaining the anchor head of a longitudinal prestressing cable which exerts a horizontal force in the direction opposite to the horizontal force exerted by the stay.
  • FIG. 10 is a section of the structure at the level of a pylon 3.
  • This pylon is a metallic or concrete structure in the shape of an inverted V, the uprights of which rest on a common pile 50.
  • the deck 1 is located between the two uprights 51, 52 of the pylon.
  • the stability of the deck vis-à-vis the transverse horizontal forces is ensured by two oblique beams 53, 54, which bear on the pile 50 at the base of the uprights 51 and 52, and meet on a support piece 55 which is secured to the lower deck by a solid support 57, visible in section in Figure 4. This avoids asymmetrical and variable tensions on the uprights 51, 52 of the pylon.
  • Figure 11 shows a particularly advantageous construction method for the bridge according to the invention.
  • a movable beam 60 is mounted on the upper member 4 and fixed to two successive attachment points sifs 61, 62 of diagonal connecting beams, constituting nodes of the spatial trellis.
  • the beam advances in cantilever beyond the already built part of the bridge, a length 63 of the upper chord is first put in place corresponding to the interval between two successive connecting beams in the longitudinal direction, then, thanks to a winch 64, the assembly formed by a corresponding length 65 of the lower member is simultaneously put in place, and the corresponding diagonal and auxiliary beams 66, 67.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Bridges Or Land Bridges (AREA)
  • Bathtub Accessories (AREA)
  • Panels For Use In Building Construction (AREA)
  • Cookers (AREA)
  • Roof Covering Using Slabs Or Stiff Sheets (AREA)

Abstract

The invention concerns a bridge whose floor comprises two superimposed members (4, 5) each serving as a road. <??>These members are connected by diagonal link beams (6), directed at an oblique angle both with respect to the vertical and with respect to the length of the bridge, and connecting the edges of the upper and lower members, and auxiliary link beams (7) located in the vertical planes passing through the edges of the lower member. The prestressing cables (17) of a diagonal beam (6) are anchored to the edge of the upper member, pass transversely through the lower member, and then through the diagonal beam which is symmetrical to it with respect to the longitudinal vertical plane of symmetry of the bridge and is then anchored to the opposite edge of the upper member. <IMAGE>

Description

La présente invention est relative à un pont, notamment à un pont de grande portée, du type haubané, et susceptible d'écouler un trafic important grâce à la présence de chaussés situées dans des plans superposés, l'une d'elles servant par exemple pour des voies ferrées, et l'autre pour la circulation automobile.The present invention relates to a bridge, in particular to a long span bridge, of the guyed type, and capable of carrying a large amount of traffic thanks to the presence of roadways located in superimposed planes, one of them being used for example for railways, and the other for automobile traffic.

Dans l'état actuel de la technique, le franchisse­ment de grandes portées fait appel soit à des ponts sus­pendus, soit à des ponts haubanés. Les ponts suspendus sont économiquement justifiés pour les portées exception­nelles, mais leur souplesse pose des problèmes pour la circulation, notamment ferroviaire, et pour la stabilité aéroélastique. De leur côté, les ponts à haubans ne pré­sentent pas la sensibilité au vent des ponts suspendus, particulièrement si le tablier est construit en béton, matériau qui confère à la structure un poids suffisant et une grande rigidité. Le poids toutefois limite les portées, de sorte qu'au-delà du domaine d'application des ponts à haubans en béton, on a eu recours à des ta­bliers à structure mixte acier/béton ou à des tabliers entièrement métalliques.In the current state of the art, the crossing of large spans uses either suspension bridges or cable-stayed bridges. Suspension bridges are economically justified for exceptional spans, but their flexibility poses problems for traffic, especially rail, and for aeroelastic stability. Cable-stayed bridges, for their part, do not exhibit the wind sensitivity of suspension bridges, particularly if the deck is constructed of concrete, a material which gives the structure sufficient weight and great rigidity. The weight, however, limits the spans, so that beyond the field of application of concrete cable-stayed bridges, aprons with a mixed steel / concrete structure or entirely metallic aprons have been used.

Dans l'état actuel de la technique, les tabliers haubanés à structure mixte acier/béton ont toujours été constitués d'une membrure supérieure en béton formant dalle de chaussée, portée par des poutres de raidissement transversales et longitudinales destinées à transférer les charges aux haubans tout en assurant une rigidité suffisante au tablier. Les réalisations de ce type sont récentes et mettent en évidence les limitations actuelles des moyens connus, sur les ponts suivants :
- la cohabitation de la charpente métallique et au béton en ce qui concerne les effets du retrait et des déformations lentes du béton,
- l'apparition de gradients de température créés par l'exposition au soleil de surfaces métalliques ayant une faible inertie thermique,
- le risque de flambement d'ensemble de la struc­ture par instabilité de la membrure inférieure des poutres longitudinales de rigidité, lorsque les contraintes dues aux charges, cumulées aux effets ci-dessus, s'approchent de la limite élastique en compression du métal,
- la très faible résistance de ce type de structure vis-à-vis d'efforts accidentels tels que l'impact d'un camion contre un hauban.In the current state of the art, guyed decks with a mixed steel / concrete structure have always consisted of an upper concrete member forming a paving slab, carried by transverse and longitudinal stiffening beams intended for transferring the loads to the guy wires. while ensuring sufficient rigidity to the deck. Achievements of this type are recent and highlight the current limitations of known means, on the following bridges:
- the coexistence of the metal frame and the concrete with regard to the effects of shrinkage and slow deformations of the concrete,
- the appearance of temperature gradients created by the exposure to the sun of metallic surfaces having a low thermal inertia,
- the risk of overall buckling of the structure by instability of the lower member of the beams longitudinal stiffness, when the stresses due to the loads, cumulated to the above effects, approach the elastic limit in compression of the metal,
- the very low resistance of this type of structure vis-à-vis accidental forces such as the impact of a truck against a shroud.

On peut remédier à plusieurs de ces inconvénients en augmentant la hauteur et l'importance des poutres lon­gitudinales de rigidité, mais c'est au détriment de la prise au vent et de l'économie.Several of these drawbacks can be remedied by increasing the height and the importance of the longitudinal stiffness beams, but this is to the detriment of the wind resistance and the economy.

On peut aussi faire appel à des structures en treillis, car elles permettent d'obtenir économiquement une grande rigidité de flexion et de torsion, tout en assurant une transparence maximale vis-à-vis du vent. Dans l'état actuel de la technique, de telles structures en treillis combinent généralement l'acier et le béton, mais malgré d'importantes recherches dans ce domaine, aucune solution vraiment satisfaisante n'a été trouvée pour transférer les efforts entre les membrures et les diagonales aux différents noeuds du treillis. Le comporte­ment à long terme de telles solutions n'est pas connu etles prix de revient restent élevés.Lattice structures can also be used, because they make it possible to economically obtain high bending and torsional rigidity, while ensuring maximum transparency with respect to the wind. In the current state of the art, such trellis structures generally combine steel and concrete, but despite significant research in this field, no really satisfactory solution has been found to transfer the forces between the members and the diagonals at the different nodes of the trellis. The long-term behavior of such solutions is unknown and cost prices remain high.

L'objet de l'invention est de pallier tous les inconvénients précédemment rappelés, en proposant une structure nouvelle à la fois légère, rigide, et facile à réaliser, donc économique.The object of the invention is to overcome all the drawbacks mentioned above, by proposing a new structure which is both light, rigid, and easy to produce, therefore economical.

L'invention fournit, pour obtenir ce résultat, un pont constitué d'un tablier et de moyens pour supporter ce tablier, le tablier comprenant :
- une membrure supérieure formant dalle de circu­lation,
- une membrure inférieure formant une dalle de circulation, moins large que la membrure supérieure,
- des poutres de liaison précontraintes, dites "diagonales", dirigées obliquement à la fois par rapport à la verticale et par rapport à la longueur du pont, et reliant les bords des membrures supérieure et inférieure, - les poutres de liaison auxiliaires, également précontraintes, situées à peu près dans des plans verticaux passant par les bords de la membrure intérieure, ces pou­tres auxiliaires faisant avec les diagonales et les mem­brures un treillis spatial, de grande rigidité,
ce pont ayant pour particularité que le ou les câbles de précontrainte d'une poutre diagonale sont ancrés au bord de la membrure supérieure, traversent tranversa­lement la membrure inférieure, puis la poutre diagonale qui lui est symétrique par rapport au plan vertical longi­tudinal de symétrie du pont, pour venir s'ancrer sur le bord opposé de la membrure supérieure.The invention provides, to obtain this result, a bridge consisting of an apron and means for supporting this apron, the apron comprising:
- an upper chord forming a circulation slab,
- a lower member forming a circulation slab, narrower than the upper member,
- prestressed connecting beams, called "diagonals", directed obliquely both with respect to the vertical and with respect to the length of the bridge, and connecting the edges of the upper and lower members, - the auxiliary connecting beams, also prestressed, located roughly in vertical planes passing through the edges of the internal frame, these auxiliary beams making with the diagonals and the frames a spatial trellis, of great rigidity,
this bridge having the particularity that the prestressing cable or cables of a diagonal beam are anchored to the edge of the upper member, cross transversely the lower member, then the diagonal beam which is symmetrical with respect to the longitudinal vertical plane of symmetry of the bridge , to come to anchor on the opposite edge of the upper chord.

On obtient ainsi, par la suppression d'un certain nombre de points d'ancrage, une structure allégée et de rigidité largement renforcée à poids égal.One thus obtains, by the elimination of a certain number of anchoring points, a lightened structure and rigidity largely reinforced with equal weight.

De préférence le ou les câbles de précontrainte d'une poutre auxiliaire sont également ancrés dans la membrure supérieure, traversent transversalement la mem­brure inférieure, passent dans la poutre auxiliaire qui lui est symétrique par rapport au plan vertical longitudi­nal de symétrie du pont, et reviennent s'ancrer sur la membrure supérieure.Preferably, the prestressing cable or cables of an auxiliary beam are also anchored in the upper chord, cross the lower chord transversely, pass through the auxiliary beam which is symmetrical with respect to the longitudinal vertical plane of symmetry of the bridge, and return s 'anchor on the upper chord.

Dans une réalisation préférée, les poutres auxi­liaires se trouvent à l'intersection des plans verticaux parallèles à l'axe, et de plan perpendiculaire à ces plans verticaux et contenant les poutres diagonales. On obtient ainsi une répartition optimale des efforts.In a preferred embodiment, the auxiliary beams are located at the intersection of the vertical planes parallel to the axis, and of plane perpendicular to these vertical planes and containing the diagonal beams. An optimal distribution of forces is thus obtained.

De préférence, la membrure supérieure est formée d'une dalle mince, raidie par des poutres transversales situées à l'endroit où les poutres diagonales et éventuel­lement les poutres auxiliaires rejoignent ladite membrure supérieure.Preferably, the upper member is formed of a thin slab, stiffened by transverse beams located at the point where the diagonal beams and possibly the auxiliary beams join said upper member.

Suivant une mode de réalisation, la membrure infé­rieure est du type métallique à caissons longitudinaux, avec des massifs en béton pour assurer la liaison avec les câbles de précontrainte des poutres diagonales et auxiliaires.According to one embodiment, the lower member is of the metallic type with longitudinal caissons, with concrete blocks to ensure the connection with the prestressing cables of the diagonal and auxiliary beams.

Suivant une autre forme de réalisation, la membrure inférieure est formée d'éléments préfabriqués en béton, assemblés dans le sens longitudinal. Le choix entre ces deux solutions est, essentiellement, une question de poids est de coût.According to another embodiment, the lower member is formed of precast concrete elements, assembled in the longitudinal direction. The choice between these two solutions is, essentially, a matter of weight is cost.

Lorsque le pont selon l'invention est du type à haubanage en éventail, on peut prévoir que le tablier su­périeur est formé par assemblage d'éléments préfabriqués ou coulés en place dont au moins certains portent une bu­tée destinée à retenir la tête d'ancrage d'un hauban, et l'élément adjacent porte une butée auxiliaire destinée à venir en appui sur la butée retenant la tête d'ancrage du hauban, cette butée auxiliaire étant destinée à retenir la tête d'ancrage d'un câble de précontrainte longitudinal du tablier, exerçant une force dirigée longitudinalement en sens inverse du hauban, si bien que l'action conjuguée du hauban et du câble de précontrainte tend à serrer l'un contre l'autre les deux éléments préfabriqués.When the bridge according to the invention is of the fan-guyed type, provision may be made for the upper deck to be formed by assembling prefabricated or cast elements in place, at least some of which carry a stop intended to retain the anchoring head d 'a shroud, and the adjacent element carries an auxiliary stop intended to come into abutment on the stop retaining the anchor head of the stay, this auxiliary stop being intended to retain the anchor head of a longitudinal prestressing cable of the apron, exerting a force directed longitudinally in the opposite direction of the shroud, so that the combined action of the shroud and the prestressing cable tends to clamp the two prefabricated elements against each other.

Dans le cas où le pont selon l'invention est du type à haubanage à éventail avec au moins un pylône en V renversé pour supporter les haubans, on prévoit avantageu­sement que le tablier est placé entre les montants du py­lône, et que des butons obliques, situés dans le plan transversal du pylône, relient le tablier à la pile por­tant le pylône, pour assurer la stabilité du tablier vis-à-­vis des efforts horizontaux.In the case where the bridge according to the invention is of the fan guyed type with at least one inverted V pylon to support the guy wires, provision is advantageously made for the deck to be placed between the uprights of the pylon, and for oblique struts, located in the transverse plane of the pylon, connect the deck to the stack carrying the pylon, to ensure the stability of the deck vis-à-vis the horizontal forces.

Suivant un procédé de construction avantageux du pont selon l'invention, on met en place à l'extrémité d'une partie de tablier déjà montée, d'une part, une lon­gueur unitaire de membrure supérieure et, d'autre part, un ensemble constitué d'une longueur égale de membrure infé­rieure et des poutres de liaison diagonales et auxiliaires associées à cette longueur, et on assemble cette longueur de membrure supérieure et cet ensemble à la fois à la par­tie du tablier déjà montée et entre eux, en s'aidant d'une poutre mobile montée en porte-à-faux sur la partie du tablier déjà montée.According to an advantageous method of construction of the bridge according to the invention, there is put in place at the end of an already assembled part of the deck, on the one hand, a unit length of upper chord and, on the other hand, an assembly consisting of an equal length of lower chord and the diagonal and auxiliary connecting beams associated with this length, and this length of upper chord and this assembly is assembled both to the part of the deck already assembled and between them, in s' using a movable beam cantilevered on the part of the deck already assembled.

L'invention va maintenant être décrite de façon plus détaillée à l'aide d'exemples pratiques illustrés avec des dessins, parmi lesquels :

  • Figure 1 est une vue schématique, en élévation, d'un pont haubané conforme à l'invention,
  • Figures 2 et 3 sont des coupes transversales cou­rantes du tablier, dans deux réalisations différentes,
  • Figure 4 est une coupe longitudinale partielle du tablier,
  • Figures 5 et 6 sont des coupes transversales et longitudinales d'une membrure inférieure métallique.
  • Figures 7 et 8 sont des vues analogues, mais pour une membrure inférieure en béton.
  • Figure 9 représente, en coupe longitudinale par­tielle agrandie, le dispositif d'ancrage des haubans dans la membrure supérieure.
  • Figure 10 est une vue en élévation transversale d'une réalisation de pylône d'un pont selon l'invention,
  • Figure 11 est un dessin illustrant un mode de construction avantageux d'un pont selon l'invention.
The invention will now be described in a manner more detailed using practical examples illustrated with drawings, among which:
  • FIG. 1 is a schematic view, in elevation, of a cable-stayed bridge according to the invention,
  • Figures 2 and 3 are common cross sections of the deck, in two different embodiments,
  • FIG. 4 is a partial longitudinal section of the deck,
  • Figures 5 and 6 are cross-sectional and longitudinal sections of a metal lower chord.
  • Figures 7 and 8 are similar views, but for a lower concrete member.
  • Figure 9 shows, in an enlarged partial longitudinal section, the device for anchoring the shrouds in the upper chord.
  • FIG. 10 is a view in transverse elevation of an embodiment of a pylon of a bridge according to the invention,
  • Figure 11 is a drawing illustrating an advantageous mode of construction of a bridge according to the invention.

Dans la réalisation de la figure 1, le pont con­forme à l'invention comprend un tablier 1, suspendu à des haubans 2, en des points régulièrement espacés, ces hau­bans sont fixés vers le sommet de mât de support, ou pylô­ne, 3. Par souci de clarté, le travée centrale est repré­sentée avec huit éléments seulement, suspendus par trois haubans de part et d'autre de la clé. En fait, dans des ponts de grande portée, l'espacement des haubans est va­riable de 10 à 20 mètres, et le nombre de haubans dans la demi-travée centrale peut atteindre vingt à vingt cinq.In the embodiment of FIG. 1, the bridge according to the invention comprises an apron 1, suspended from guy lines 2, at regularly spaced points, these guy lines are fixed towards the top of the support mast, or pylon, 3. By for the sake of clarity, the central span is shown with only eight elements, suspended by three guy wires on either side of the key. In fact, in long span bridges, the spacing of the shrouds is variable from 10 to 20 meters, and the number of shrouds in the central half-span can reach twenty to twenty five.

Le tablier comprend une membrure supérieure 4, formant chaussée, et une membrure inférieure 5, qui forme une seconde chaussée. Ces deux membrures sont reliées par des poutres de liaison orientées obliquement, 6, 7, mieux visibles sur les figures suivantes.The deck comprises an upper chord 4, forming a roadway, and a lower chord 5, which forms a second roadway. These two members are connected by connecting beams oriented obliquely, 6, 7, better visible in the following figures.

On a symbolisé par des tirets, un certain nombre de cables de précontrainte 8 associés à des poutres de liaison, et d'autres câbles de précontrainte longitudinaux 9, 10, renforçant les membrures supérieure et inférieure du tablier.There have been symbolized by dashes, a certain number of prestressing cables 8 associated with connecting beams, and other longitudinal prestressing cables 9, 10, reinforcing the upper and lower members. of the apron.

La figure 2 montre une réalisation du tablier qui comporte, sur sa membrure inférieure, une chaussée à deux voies de circulation dans chaque sens, et, sur la membrure inférieure, une voie de chemin de fer.FIG. 2 shows an embodiment of the deck which comprises, on its lower member, a carriageway with two lanes of traffic in each direction, and, on the lower member, a railway track.

La figure 3 montre une autre réalisation du ta­blier, pour un trafic plus important, comportant, sur la membrure supérieure, des chaussées à trois voies de circulation dans chaque sens, et, sur la membrure infé­rieure, trois lignes de métro.Figure 3 shows another embodiment of the deck, for higher traffic, comprising, on the upper frame, pavements with three lanes of traffic in each direction, and, on the lower frame, three metro lines.

Dans les deux cas, le pont est du type dans lequel les haubans 2 forment une nappe verticale axiale, ou deux nappes verticales adjacentes, soutenant le tablier par sa partie centrale. Cependant, dans d'autres réalisations, notamment pour des ponts de grande portée, les haubans soutiennent le tablier par ses bords.In both cases, the bridge is of the type in which the shrouds 2 form an axial vertical ply, or two adjacent vertical plies, supporting the deck by its central part. However, in other embodiments, in particular for long-span bridges, the guy wires support the deck by its edges.

Sur les deux figures, la disposition des poutres de liaison est la même : des poutres de liaison diagonales relient les bords des deux membrures, et des poutres auxi­liaires 7 relient le bord de la membrure inférieure à la membrure supérieure en restant dans un plan vertical axial. En se reportant à la figure 1, on constate que les membrures 6 et 7 sont contenues dans les mêmes plans, obliques par rapport à l'horizontale, et perpendiculaires au plan vertical axial de symétrie de l'ouvrage.In the two figures, the arrangement of the connecting beams is the same: diagonal connecting beams connect the edges of the two members, and auxiliary beams 7 connect the edge of the lower member to the upper member while remaining in an axial vertical plane . Referring to Figure 1, we see that the members 6 and 7 are contained in the same planes, oblique to the horizontal, and perpendicular to the vertical axial plane of symmetry of the structure.

La membrure supérieure 4 est formée d'une dalle relativement mince 11, renforcée par des poutres transver­sales 12, situées à sa partie inférieure et qui portent des moyens d'accrochage 13 des haubans.The upper frame 4 is formed of a relatively thin slab 11, reinforced by transverse beams 12, located at its lower part and which carry hooking means 13 of the shrouds.

La membrure inférieure 5 est, dans le cas de ces figures, une structure métallique comportant des caissons longitudinaux de bordure 14, et centraux 15.The lower chord 5 is, in the case of these figures, a metallic structure comprising longitudinal border boxes 14 and central 15.

Les poutres de liaison diagonales 6 sont des pou­tres métalliques creuses, qui prennent appui d'une part sur un caisson latéral 14 de la membrure inférieure, et d'autre part sur une ferrure 16 solidaire de la poutre transversale 12. Les poutres de liaison auxiliaires 7, qui sont également creuses, prennent appui d'une part sur les caissons de bordure 14 de la membrure inférieure, et d'autre part, directement sur la poutre 12.The diagonal connecting beams 6 are hollow metal beams, which bear on the one hand on a lateral box 14 of the lower member, and on the other hand on a fitting 16 secured to the transverse beam 12. The auxiliary connecting beams 7, which are also hollow, rest on the one hand on the border boxes 14 of the lower chord, and on the other hand, directly on the beam 12.

Les câbles de précontrainte 17 des poutres de liaison diagonales sont ancrés d'une part sur le bord 18 de la dalle supérieure 13. Ils traversent successivement une poutre diagonale 6, les caissons 14 et 15 de la mem­brure inférieure, dans un plan transversal par rapport au pont, et une autre poutre diagonale 6 pour venir s'accro­cher au bord 18 opposé de la dalle 13.The prestressing cables 17 of the diagonal connecting beams are anchored on the one hand on the edge 18 of the upper slab 13. They successively pass through a diagonal beam 6, the boxes 14 and 15 of the lower member, in a plane transverse to to the bridge, and another diagonal beam 6 to hang on the opposite edge 18 of the slab 13.

Les câbles de précontrainte 19 des poutres auxi­liaires traversent, de façon similaire, successivement une poutre de liaison 7, les caissons 14 et 15 de la membrure inférieure, et la poutre de liaison 7. Ils sont ancrés, à leurs deux extrémités, à la face supérieure de la poutre 12.The prestressing cables 19 of the auxiliary beams pass, similarly, successively through a connecting beam 7, the boxes 14 and 15 of the lower member, and the connecting beam 7. They are anchored, at their two ends, to the face top of beam 12.

La figure 5 est une vue partielle agrandie de la figure 2, pour mieux montrer la structure du tablier infé­rieur.Figure 5 is an enlarged partial view of Figure 2, to better show the structure of the lower deck.

Les caissons 14 présentent, sur leurs bords, des surfaces obliques 20, perpendiculaires aux poutres de liaison diagonales 6, et sur lesquelles celles-ci viennent prendre appui.The boxes 14 have, on their edges, oblique surfaces 20, perpendicular to the diagonal connecting beams 6, and on which these come to bear.

Sur le caisson 14, un caisson auxiliaire 21, qui s'élargit vers le bas en direction du centre de la membru­re, sert d'appui à la poutre auxiliaire 7. A l'endroit de la jonction avec les poutres de liaison 6 et 7, les cais­sons sont obturés par des cloisons transversales obliques 20, d'inclinaison par rapport à l'horizontale identique à celle des poutres de liaison. L'espace à section transver­sale en V, défini par ces deux cloisons transversales obli­ques 20, est rempli de béton 21, et contient les tubes 22 et 23 dans lesquels sont placés les câbles de précontrain­te, respectivement 17 et 19, pour la transmission de la tension de précontrainte à la membrure inférieure. C'est dans les tubes 22 et 23 que s'effectue le changement de direction des câbles de précontrainte 17, 19. Ceux-ci tra­versent perpendiculairement les cloisons longitudinales 24 qui séparent les caissons latéraux 14 des caissons cen­ traux 15. Comme on peut le voir sur la figure 5, ces cloi­sons 24 sont placées au droit des rails de la voie de chemin de fer.On the box 14, an auxiliary box 21, which widens downwards towards the center of the frame, serves as a support for the auxiliary beam 7. At the place of the junction with the connecting beams 6 and 7 , the boxes are closed by oblique transverse partitions 20, of inclination relative to the horizontal identical to that of the connecting beams. The space in V cross section, defined by these two oblique transverse partitions 20, is filled with concrete 21, and contains the tubes 22 and 23 in which are placed the prestressing cables, respectively 17 and 19, for the transmission of the prestressing tension at the lower chord. It is in the tubes 22 and 23 that the change of direction of the prestressing cables 17, 19 takes place. These cross perpendicularly the longitudinal partitions 24 which separate the lateral boxes 14 from the central boxes. traux 15. As can be seen in FIG. 5, these partitions 24 are placed to the right of the rails of the railway track.

Les figures 7 et 8 sont des coupes transversales d'une variante, dans laquelle la membrure inférieure est constituée d'un assemblage d'éléments préfabriqués 30 en béton, disposés longitudinalement les uns à la suite des autres, comme cela est indiqué à la figure 3.Figures 7 and 8 are cross sections of a variant, in which the lower chord consists of an assembly of precast concrete elements 30, arranged longitudinally one after the other, as shown in the figure 3.

Les éléments 30 comprennent une dalle plane 31, qui porte sur ses bords latéraux une nervure épaissie 32, qui sert notamment d'appui pour les poutres de liaison diagonales 6 et auxiliaires 7, ces dernières venant en appui sur l'élément 30 par l'intermédiaire d'un caisson 33, identique au caisson 21 décrit à propos des figures 7 et 8.The elements 30 comprise a flat slab 31, which carries on its lateral edges a thickened rib 32, which in particular serves as a support for the diagonal 6 and auxiliary 7 connection beams, the latter coming to bear on the element 30 by the intermediate of a box 33, identical to the box 21 described with reference to FIGS. 7 and 8.

Les éléments 30 successifs se rejoignent entre eux à l'endroit où s'accrochent les poutres de liaison 6 et 7. A leur extrémité, les éléments 30 portent un ren­fort inférieur 34, les éléments 34 venant en appui l'un contre l'autre à leur extrémité inférieure, et laissant entre leur partie supérieure un espace vide 35, à peu près en forme de V, qui est rempli ultérieurement avec du bé­ton.The successive elements 30 join together at the place where the connecting beams 6 and 7 hang. At their end, the elements 30 carry a lower reinforcement 34, the elements 34 coming to bear against one another at their lower end, and leaving between their upper part an empty space 35, roughly V-shaped, which is subsequently filled with concrete.

Les tubes 36, 37 qui contiennent et guident les câbles de précontrainte 17 et 19 passent à travers les extrémités des dalles 31 et à travers les renforts 34, pour transmettre les efforts de précontrainte aux blocs 30.The tubes 36, 37 which contain and guide the prestressing cables 17 and 19 pass through the ends of the slabs 31 and through the reinforcements 34, to transmit the prestressing forces to the blocks 30.

La figure 9 montre un détail de la membrure supé­rieure, qui, comme la membrure inférieure des figures 3, 5 et 6, est formée d'un assemblage d'éléments en béton, préfabriqués ou coulés en place, en appui les uns sur les autres dans le sens longitudinal.Figure 9 shows a detail of the upper chord, which, like the lower chord of Figures 3, 5 and 6, is formed by an assembly of concrete elements, prefabricated or cast in place, resting on each other in the longitudinal direction.

Deux éléments 40, 41 sont représentés par leurs extrémités. L'élément 40 porte un petit massif 42, qui sert à l'ancrage d'un hauban 43, qui traverse la dalle. Un second massif d'ancrage 43, lui fait vis-à-vis sur l'élé­ment 41. Il sert à l'ancrage d'un câble de précontrainte 44, disposé longitudinalement. Les deux massifs 42, 43 présentent des surfaces verticales, transversales, 45, 46, par lesquelles ils viennent en appui l'un sur l'autre. La tension du hauban 3 et du câble de précontrainte 44 tend donc à les maintenir fermement en appui.Two elements 40, 41 are represented by their ends. The element 40 carries a small block 42, which is used for anchoring a guy 43, which crosses the slab. A second anchor block 43, facing it on the element 41. It is used for anchoring a prestressing cable 44, arranged longitudinally. The two blocks 42, 43 have vertical, transverse surfaces, 45, 46, by which they come to bear one on the other. The tension of the shroud 3 and of the prestressing cable 44 therefore tends to keep them firmly in support.

On a représenté en 47 un autre câble de précon­trainte longitudinal, qui traverse la jonction des élé­ments 40 et 41, et va s'ancrer sur des éléments situés plus loin dans le sens longitudinal du pont, de façon à assurer la rigidité de l'ensemble de la membrure supérieu­re.Another longitudinal prestressing cable has been shown at 47, which crosses the junction of the elements 40 and 41, and will be anchored on elements located further in the longitudinal direction of the bridge, so as to ensure the rigidity of the assembly. of the upper chord.

Dans d'autres réalisations où la membrure supé­rieure du tablier est monobloc, tout au moins au voisinage de l'ancrage d'un hauban, la membrure présente des butées, dont la forme peut correspondre à celle des deux massifs 43 et 43 assemblés, ces butées retenant chacune la tête d'ancrage d'un hauban et retenant en même temps la tête d'ancrage d'un câble de précontrainte longitudinale qui exerce une force horizontale en direction opposée à la force horizontale exercée par le hauban.In other embodiments where the upper member of the deck is in one piece, at least in the vicinity of the anchoring of a stay, the member has stops, the shape of which can correspond to that of the two solid masses 43 and 43 assembled, these stops each retaining the anchor head of a stay and at the same time retaining the anchor head of a longitudinal prestressing cable which exerts a horizontal force in the direction opposite to the horizontal force exerted by the stay.

La figure 10 est une coupe de l'ouvrage au niveau d'un pylône 3.FIG. 10 is a section of the structure at the level of a pylon 3.

Ce pylône est une structure métallique ou en béton en forme de V renversé, dont les montants reposent sur une pile commune 50. Le tablier 1 se trouve entre les deux montants 51, 52 du pylône. La stabilité du tablier vis-à-­vis des efforts horizontaux transversaux est assurée par deux poutres obliques 53, 54, qui prennent appui sur la pile 50 à la base des montants 51 et 52, et se rejoignent sur une pièce de soutien 55 qui est solidarisée au tablier inférieur par un massif d'appui 57, visible en section à la figure 4. On évite ainsi des tensions asymétriques et variables sur les montants 51, 52 du pylône.This pylon is a metallic or concrete structure in the shape of an inverted V, the uprights of which rest on a common pile 50. The deck 1 is located between the two uprights 51, 52 of the pylon. The stability of the deck vis-à-vis the transverse horizontal forces is ensured by two oblique beams 53, 54, which bear on the pile 50 at the base of the uprights 51 and 52, and meet on a support piece 55 which is secured to the lower deck by a solid support 57, visible in section in Figure 4. This avoids asymmetrical and variable tensions on the uprights 51, 52 of the pylon.

La figure 11 montre une méthode de construction particulièrement avantageuse pour le pont selon l'inven­tion.Figure 11 shows a particularly advantageous construction method for the bridge according to the invention.

Une poutre mobile 60 est montée sur la membrure supérieure 4 et fixée à deux points d'accrochage succes­ sifs 61, 62 de poutres de liaison diagonales, constituant des noeuds du treillis spatial. La poutre avance en porte-­à-faux au-delà de la partie déjà construite du pont, on met en place d'abord une longueur 63 de la membrure supé­rieure correspondant à l'intervalle entre deux poutres de liaison successives dans la direction longitudinale, puis, grâce à un treuil 64, on met en place simultanément l'ensemble formé par une longueur correspondante 65 de la membrure inférieure, et les poutres diagonales et auxi­liaires correspondantes 66, 67. Il suffit ensuite de soli­dariser cet élément triangulé avec, d'une part, la partie de tablier inférieur 68 déjà construite et, d'autre part, avec la partie de tablier supérieur 63 déjà mise en place, et d'opérer la mise en précontrainte de l'ensemble. Après cela, la poutre 60 peut être déplacée d'une nouvelle lon­gueur, et on recommence les opérations.A movable beam 60 is mounted on the upper member 4 and fixed to two successive attachment points sifs 61, 62 of diagonal connecting beams, constituting nodes of the spatial trellis. The beam advances in cantilever beyond the already built part of the bridge, a length 63 of the upper chord is first put in place corresponding to the interval between two successive connecting beams in the longitudinal direction, then, thanks to a winch 64, the assembly formed by a corresponding length 65 of the lower member is simultaneously put in place, and the corresponding diagonal and auxiliary beams 66, 67. It is then sufficient to secure this triangulated element with, d on the one hand, the lower deck part 68 already built and, on the other hand, with the upper deck part 63 already in place, and to operate the prestressing of the assembly. After that, the beam 60 can be moved a new length, and the operations are started again.

Claims (10)

1. Pont constitué d'un tablier (1) et de moyens (2, 3) pour supporter ce tablier, le tablier comprenant :
- une membrure supérieure (4) formant une dalle de circulation,
- une membrure inférieure (5) formant une dalle de circulation, moins large que la membrure supérieure,
- des poutres de liaison précontraintes, dites "diagonales" (6), dirigées obliquement à la fois par rap­port à la verticale et par rapport à la longueur du pont, et reliant les bords des membrures supérieure et inférieu­re,
- des poutres de liaison précontraintes auxiliai­res (7), situées dans des plans verticaux passant par les bords de la membrure inférieure,
caractérisé en ce que le ou les câbles de précon­trainte (17) d'une poutre diagonale (6) sont ancrés au bord de la membrure supérieure, traversent transversale­ment la membrure inférieure, puis la poutre diagonale qui lui est symétrique par rapport au plan vertical longitudi­nal de symétrie du pont pour venir s'ancrer sur le bord opposé de la membrure supérieure.1. Bridge consisting of an apron (1) and means (2, 3) for supporting this apron, the apron comprising:
- an upper chord (4) forming a circulation slab,
- a lower member (5) forming a circulation slab, narrower than the upper member,
- prestressed connecting beams, called "diagonals" (6), directed obliquely both with respect to the vertical and with respect to the length of the bridge, and connecting the edges of the upper and lower members,
- auxiliary prestressed connecting beams (7), located in vertical planes passing through the edges of the lower member,
characterized in that the prestressing cable or cables (17) of a diagonal beam (6) are anchored to the edge of the upper chord, cross the lower chord transversely, then the diagonal beam which is symmetrical to it with respect to the longitudinal vertical plane of symmetry of the bridge to come to anchor on the opposite edge of the upper chord. 2. Pont selon la revendication 1, caractérisé en ce que le ou les câbles de précontrainte (19) d'une poutre auxiliaire (7) sont ancrés sur la membrure supérieure, tra­versent transversalement la membrure inférieure puis la poutre auxiliaire qui lui est symétrique par rapport au plan vertical longitudinal de symétrie du pont.2. Bridge according to claim 1, characterized in that the prestressing cable or cables (19) of an auxiliary beam (7) are anchored on the upper chord, transversely pass through the lower chord then the auxiliary beam which is symmetrical to it by relation to the longitudinal vertical plane of symmetry of the bridge. Pont selon la revendication 1 ou 2, caractérisé en ce que les poutres auxiliaires (7) sont à l'intersection des plans verticaux passant par les bords de la membrure inférieure et les plans obliques, perpendiculaires auxdits plans verticaux et contenant les poutres diagonales (6).Bridge according to claim 1 or 2, characterized in that the auxiliary beams (7) are at the intersection of the vertical planes passing through the edges of the lower member and the oblique planes, perpendicular to said vertical planes and containing the diagonal beams (6 ). 4. Pont selon l'une des revendications 1 à 3, ca­ractérisé en ce que la membrure supérieure (4) est formée d'une dalle mince raidie par des poutres transversales (12) situées à l'endroit où les poutres diagonales, et éventuellement les poutres auxiliaires, rejoignent ladite membrure supérieure.4. Bridge according to one of claims 1 to 3, characterized in that the upper frame (4) is formed of a thin slab stiffened by transverse beams (12) located at the place where the diagonal beams, and possibly the auxiliary beams, join said upper chord. 5. Pont selon l'une des revendications 1 à 4, caractérisé en ce que la membrure inférieure est du type métallique à caissons longitudinaux (14, 15), avec des massifs en béton (21) pour assurer la liaison avec les câbles de précontrainte (17, 19) des poutres diagonales et auxiliaires.5. Bridge according to one of claims 1 to 4, characterized in that the lower member is of the metal type with longitudinal caissons (14, 15), with concrete blocks (21) to ensure the connection with the prestressing cables (17, 19) of the diagonal and auxiliary beams. 6. Pont selon l'une des revendications 1 à 4, caractérisé en ce que la membrure inférieure est formée d'éléments préfabriqués en béton (30), assemblés dans le sens longitudinal.6. Bridge according to one of claims 1 to 4, characterized in that the lower member is formed of prefabricated concrete elements (30), assembled in the longitudinal direction. 7. Pont selon l'une des revendications 1 à 6, et du type à haubanage en éventail, caractérisé en ce que le tablier supérieur est formé par assemblage d'élé­ments préfabriqués ou coulés en place (40) dont au moins certains portent une butée (42) destinée à retenir la tête d'ancrage d'un hauban (3), et l'élément adjacent porte une butée auxiliaire (43) destinée à venir en appui sur la butée retenant la tête d'ancrage du hauban, cette butée auxiliaire étant destinée à retenir la tête d'ancrage d'un câble (44) de précontrainte longitudinale du tablier, exerçant une force dirigée longitudinalement en sens inverse du hauban, si bien que l'action conjuguée du hau­ban et du câble de précontrainte tend à serrer l'un contre l'autre les deux éléments préfabriqués.7. Bridge according to one of claims 1 to 6, and of the guyed fan type, characterized in that the upper deck is formed by assembling prefabricated elements or cast in place (40) at least some of which bear a stop. (42) intended to retain the anchoring head of a stay (3), and the adjacent element carries an auxiliary stop (43) intended to come into abutment on the stop retaining the anchoring head of the stay, this stop auxiliary being intended to retain the anchoring head of a cable (44) for longitudinal prestressing of the bulkhead, exerting a force directed longitudinally in the opposite direction to the shroud, so that the combined action of the shroud and of the prestressing rope tends to clamp the two prefabricated elements against each other. 8. Pont selon l'une des revendications 1 à 6 et du type à haubanage en éventail, caractérisé en ce que la membrure supérieure présente des butées retenant chacune la tête d'ancrage d'un hauban, et retenant en même temps la tête d'ancrage d'un câble de précontrainte longitudina­le exerçant une force horizontale en direction opposée à la force horizontale exercée par le hauban.8. Bridge according to one of claims 1 to 6 and of the guyed fan type, characterized in that the upper member has stops each retaining the anchoring head of a guy line, and at the same time retaining the head d anchoring of a longitudinal prestressing cable exerting a horizontal force in the direction opposite to the horizontal force exerted by the stay. 9. Pont selon l'une des revendications 1 à 8 et du type à haubanage en éventail, comportant au moins un pylône en V renversé pour supporter les haubans, caracté­risé en ce que le tablier est placé entre les montants du pylône et que des butons obliques (54), situés dans le plan transversal du pylône, relient le tablier à la pile (50) portant le pylône, pour assurer la stabilité du ta­blier vis-à-vis des efforts horizontaux.9. Bridge according to one of claims 1 to 8 and of the guyed fan type, comprising at least one inverted V pylon to support the guy lines, characterized in that the deck is placed between the uprights of the pylon and that of the struts obliques (54), located in the transverse plane of the pylon, connect the deck to the pile (50) carrying the pylon, to ensure the stability of the deck vis-à-vis the horizontal forces. 10. Procédé de construction d'un pont selon l'une des revendications 1 à 9, caractérisé en ce qu'on met en place à l'extrémité d'une partie du tablier déjà montée, d'une part, une longueur unitiaire (63) de membrure supé­rieure et, d'autre part, un ensemble constitué d'une lon­gueur axiale (65) de membrure inférieure et des poutres de liaison diagonales et auxiliaires (66, 67) associées à cette longueur, et on assemble cette longueur de membrure supérieure et cet ensemble à la fois à la partie du tablier déjà montée et entre eux, en s'aidant d'une poutre mobile montée en porte-à-faux sur la partie de tablier déjà mon­tée.10. A method of constructing a bridge according to one of claims 1 to 9, characterized in that a unit length (at the end of a part of the deck already assembled) is placed ( 63) of upper chord and, on the other hand, an assembly consisting of an axial length (65) of lower chord and of the diagonal and auxiliary connecting beams (66, 67) associated with this length, and this length of upper chord and this assembly both at the part of the deck already mounted and between them, using a movable beam mounted in cantilever on the deck part already mounted.
EP89400731A 1988-03-25 1989-03-16 Bridge floor for long span bridge Expired - Lifetime EP0340051B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89400731T ATE73187T1 (en) 1988-03-25 1989-03-16 BRIDGE PANEL FOR A LARGE SPAN BRIDGE.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8803957 1988-03-25
FR8803957A FR2629111B1 (en) 1988-03-25 1988-03-25 APRON FOR LARGE LENGTH BRIDGE

Publications (2)

Publication Number Publication Date
EP0340051A1 true EP0340051A1 (en) 1989-11-02
EP0340051B1 EP0340051B1 (en) 1992-03-04

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US (1) US4987629A (en)
EP (1) EP0340051B1 (en)
JP (1) JPH01284601A (en)
AT (1) ATE73187T1 (en)
CA (1) CA1307082C (en)
DE (1) DE68900901D1 (en)
DK (1) DK130089A (en)
ES (1) ES2030281T3 (en)
FR (1) FR2629111B1 (en)
GR (1) GR3004332T3 (en)
PT (1) PT90101B (en)

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CN102094385A (en) * 2010-12-07 2011-06-15 中铁大桥勘测设计院有限公司 Main girder of steel box composite girder with long cantilever arms for single-plane cable stayed bridge
CN103556566A (en) * 2013-11-21 2014-02-05 中铁第四勘察设计院集团有限公司 Main girder structure of cable-stayed bridge of large-span railway
CN105113382A (en) * 2015-05-21 2015-12-02 中铁大桥勘测设计院集团有限公司 Inclined-strut and double-web connection structure for steel truss with auxiliary purlins
CN105714668A (en) * 2014-12-21 2016-06-29 湖南科技大学 Multifunctional concrete box-girder bridge for double-deck traffic
CN105714666A (en) * 2014-12-21 2016-06-29 湖南科技大学 Transverse stiffening ring based on double-layer traffic concrete box girder bridge

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KR100782523B1 (en) 2006-09-12 2007-12-06 현대건설주식회사 Prestressed concrete box girder bridge having struts
KR101171039B1 (en) * 2010-09-02 2012-08-06 오베아룹코리아(주) Partially and fully earth-anchored cable-stayed bridge using main span prestressing appratus and construction method for the same
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CH706630B1 (en) * 2013-05-14 2013-12-31 S & P Clever Reinforcement Company Ag Method for pretensioning steel structure e.g. iron bridge, involves vertically driving lifting element to polymer tapes in region between end anchorages for causing traction force tensioning between end regions of polymer tapes
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CN108505428B (en) * 2018-05-23 2023-12-19 中铁第四勘察设计院集团有限公司 Large-included-angle small-radius multi-tower curve cable-stayed bridge
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CN114960395B (en) * 2022-07-11 2023-08-25 山西省交通规划勘察设计院有限公司 Transverse long cantilever arm closed steel box combined beam bridge

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CN102094385A (en) * 2010-12-07 2011-06-15 中铁大桥勘测设计院有限公司 Main girder of steel box composite girder with long cantilever arms for single-plane cable stayed bridge
CN103556566A (en) * 2013-11-21 2014-02-05 中铁第四勘察设计院集团有限公司 Main girder structure of cable-stayed bridge of large-span railway
CN103556566B (en) * 2013-11-21 2015-08-19 中铁第四勘察设计院集团有限公司 Long-Span Railway Cable-Stayed Bridge main beam structure
CN105714668A (en) * 2014-12-21 2016-06-29 湖南科技大学 Multifunctional concrete box-girder bridge for double-deck traffic
CN105714666A (en) * 2014-12-21 2016-06-29 湖南科技大学 Transverse stiffening ring based on double-layer traffic concrete box girder bridge
CN105714666B (en) * 2014-12-21 2019-01-15 湖南科技大学 One kind being based on double-layer traffic concrete box-beam bridge lateral stiffening ring
CN105714668B (en) * 2014-12-21 2019-03-29 湖南科技大学 A kind of multifunctional concrete Box-girder Bridges for double-layer traffic
CN105113382A (en) * 2015-05-21 2015-12-02 中铁大桥勘测设计院集团有限公司 Inclined-strut and double-web connection structure for steel truss with auxiliary purlins

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DK130089D0 (en) 1989-03-17
PT90101A (en) 1989-11-10
GR3004332T3 (en) 1993-03-31
FR2629111A1 (en) 1989-09-29
FR2629111B1 (en) 1990-11-30
CA1307082C (en) 1992-09-08
US4987629A (en) 1991-01-29
DK130089A (en) 1989-09-26
JPH01284601A (en) 1989-11-15
PT90101B (en) 1994-03-31
ES2030281T3 (en) 1992-10-16
ATE73187T1 (en) 1992-03-15
EP0340051B1 (en) 1992-03-04
DE68900901D1 (en) 1992-04-09

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