EP2649239B1 - Dispositif de deviation d'un cable de structure tel qu'un hauban, et ouvrage ainsi equipe - Google Patents

Dispositif de deviation d'un cable de structure tel qu'un hauban, et ouvrage ainsi equipe Download PDF

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Publication number
EP2649239B1
EP2649239B1 EP11811045.1A EP11811045A EP2649239B1 EP 2649239 B1 EP2649239 B1 EP 2649239B1 EP 11811045 A EP11811045 A EP 11811045A EP 2649239 B1 EP2649239 B1 EP 2649239B1
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EP
European Patent Office
Prior art keywords
conduit
section
cross
central portion
construction work
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.)
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Application number
EP11811045.1A
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German (de)
English (en)
French (fr)
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EP2649239A2 (fr
Inventor
Erik Mellier
Stéphane JOYE
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Soletanche Freyssinet SA
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Soletanche Freyssinet SA
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Priority to PL11811045T priority Critical patent/PL2649239T3/pl
Publication of EP2649239A2 publication Critical patent/EP2649239A2/fr
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Publication of EP2649239B1 publication Critical patent/EP2649239B1/fr
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Classifications

    • 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
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
    • E04C5/08—Members specially adapted to be used in prestressed constructions

Definitions

  • the present invention relates to devices used to deflect structural cables, including guy wires.
  • the cables In cable-stayed structures, the cables have an upper part located at a pylon and lower ends anchored to the suspended structure, for example the deck of a bridge. In a traditional design, each cable has its upper end anchored on the pylon.
  • guyed structures in which the cables follow paths of generally inverted V shape, being deflected on the pylon using a device commonly called saddle.
  • the strands of the cable follow curved paths, typically following a substantially constant radius of curvature.
  • the strands extend uninterruptedly along the saddle. It is necessary to ensure sufficient friction of the strands on the saddle to avoid unwanted sliding.
  • WO 2007/121782 A1 describes a saddle in which each strand forming a strand of the cable is received in an individual conduit whose wall has, on either side of the plane containing the curved path of the strand, two inclined faces giving the conduit a general V-shaped section.
  • the V-shaped section of the duct blocks the strand by corner effect when it is tensioned by the load of the structure.
  • This saddle design is not without drawbacks.
  • the contacts between the strand and the wall of its conduit are punctual, which is not conducive to a good distribution of local constraints.
  • the saddle is not compatible with the use of individually wrapped strands because the individual sheath of a strand would be damaged by the jamming force generated by the V-shaped duct.
  • these individually wrapped strands are very often preferred for the production of structural cables because their resistance to corrosion is enhanced by the insulation imparted to the sheath. If we nevertheless want to use such strands with the saddle of WO 2007/121782 A1 , the sheaths must be removed from the lengths of the strands placed inside the saddle, which requires the implementation of special measures to isolate the metal sufficiently from the strands. Despite these measures, which can be complex and costly, the stripping of the strands at the approach of the saddle may be a weakness in the corrosion protection of the stays.
  • An object of the present invention is to provide another saddle design that reduces the incidence of the above problems, including ensuring adequate transmission of stresses within the curved path followed by the strands.
  • the invention thus proposes a device for deflecting a structural cable comprising several stretched strands.
  • the device comprises a body traversed by conduits.
  • Each duct has a wall for guiding one of the strands along a curved path.
  • the wall of the duct has a support zone of the strand directed inwardly of the curvature of the path, which support zone has, at least in a central portion of the duct and transversely to the curved path, an arcuate section of circle of radius substantially equal to half the outer diameter of the strand.
  • the central portion of the duct has an enlarged cross section outside the support zone.
  • Maintaining the strands in their conduit, preventing their sliding along the curved path, results from the friction of the strand in the support zone of the duct wall which may have a roughness more or less marked.
  • the strand is in contact with this support zone on a surface having a certain extent given the arcuate shape of radius adapted to the strand. It is pressed against this support zone by the tension applied on the cable.
  • the deflection device makes it possible to use strands each comprising a metal strand and a plastic sheath surrounding the strand.
  • the sheath can then be uninterrupted through the saddle and cable anchors, being applied against the support area of the duct wall.
  • an angular sector of at least 60 ° for the arcuate shape of the section of the support zone provides sufficient frictional locking in many configurations.
  • This angular sector may in particular be between 90 and 120 °.
  • the ducts have a sufficient section to allow threading without difficulty strands. This property can be obtained by giving them a cross section sufficient to contain a circle with a diameter of at least 2 mm greater than the outer diameter of the strand.
  • the shape of the cross section of the central portion of the duct outside the support zone may be that of a vault of diameter greater than the outside diameter of the strand.
  • a vault shape for example circular, avoids undesirable concentrations of stress in the material located between the individual conduits of the device.
  • the conduit may be formed so that its cross section flares outwardly on at least one side of its central portion.
  • the flare may in particular follow, on the inner side of the curvature of the path, a substantially circular generative line of radius less than the radius of curvature of the path in the central portion of the conduit.
  • the deflection device further comprises a curved tube for receiving the structural cable, the body provided with the conduits being housed inside the curved tube.
  • Another aspect of the invention relates to a construction structure, such as a cable-stayed bridge, comprising at least one structural cable comprising a plurality of tensioned strands, anchors of the strands at the ends of the cable, and at least one device for deflecting the cable between the two anchors, this device being as defined above.
  • the construction example shown on the figure 1 consists of a cable-stayed bridge.
  • the deck 1 of such a bridge is traditionally carried by one or more towers 2 via stays 3 along inclined paths between the pylon and the deck.
  • each stay 3 passes through a deflection device 5 made according to the invention, hereinafter called saddle.
  • the saddle 5 comprises a curved metal tube 6 embedded in the concrete of which the tower 2 is made.
  • the curved tube 6 has, for example, been shaped by bending a steel tube and then placed in the appropriate geometric configuration before Pour the concrete tower 2.
  • the structural cable is here formed by a guy 3 composed of several strands 4 stretched through the saddle 5 without interruption.
  • the strands 4 preferably consist of individually sheathed strands, the metal strand and its plastic sheath. being both uninterrupted inside the saddle 5.
  • each strand 4 follows a curved path T ( figure 3 ) defined by an individual duct 10.
  • the ducts 10 are formed in a body 7 of molded material housed inside the curved tube 6.
  • the stay 3 extends freely to the two anchors 8 installed on the deck 1.
  • These anchors 8 may for example be in accordance with that described in FIG. WO 00/75453 A1 .
  • the ducts 10 formed in the saddle 5 each receive a respective sheathed strand 4. In their central part, they preferably follow a curved path T of constant radius R.
  • the cross section of the duct 10 has for example the shape shown on the figure 4 , where the wall of the duct has a support zone 11 directed inwardly of the curvature of the path T.
  • the shape of the support zone 11 is in an arc of radius of radius r.
  • the radius r of the arcuate shape of the support zone 11 in the central part of the duct 10 corresponds to half the outer diameter of the strand 4.
  • the support zone 11 has a relatively large contact area between the wall of the duct 10 and the periphery of the strand 4, which generates a proper friction force to maintain the strand in position when it is tensioned by the load of the structure.
  • the angular sector ⁇ on which the support zone extends is advantageously at least 60 °. Optimally, this angular aperture ⁇ is between 90 ° and 120 °.
  • the upper part 12 of the wall of the duct 10, towards the outside of its curvature, is wider than the support zone in order to allow the smooth insertion of the strand 4 during the mounting of the stay.
  • This widening of the central portion of the duct outside the support zone 11 can be achieved by giving the upper portion 12 a vault-shaped cross section of diameter greater than the outer diameter of the strand. It has been determined that the insertion of the strand 4 into the duct takes place without any problem when the cross section of the duct, in its central part, is sufficient to contain a circle C of diameter greater than minus 2 mm to the outer diameter of strand 4, as shown in figure 6 .
  • the strand 4 can be threaded into its conduit without rubbing on the saddle 5.
  • a removable wedge 15 for example in the form of a plastic ribbon, before threading.
  • the arch shape of the upper part 12 of the wall of the duct 10 may in particular have a circular profile of radius r '> r, radial shoulders 13 then connecting the support zone 11 to the upper part 12.
  • the rounded shape of the vault is favorable to the vertical flow of compressive stresses in the molded matrix 7 of the saddle 5.
  • the cross section of the duct 10 flares outwardly on either side of the central portion. This flare, visible on the figure 3 , used to guide the deviations of the strands resulting from load variations in the cables.
  • the flaring of the cross section of the duct 10 can follow a generating line whose shape is advantageously circular with a radius R 'smaller than the radius of curvature R of the path T in the central portion
  • the fact that the radius R 'is constant makes it possible to limit the bending stresses to which the strands 4 are subjected.
  • the flaring of the cross section of the duct 10 at both ends may result from a homothety of the shape shown in FIG. figure 4 .
  • One variant consists in progressively widening outwardly the inner part of the section of the duct so as to make it tend towards the circle of radius r 'on the external face of the saddle 5.
  • Another variant consists in placing, on both sides, another of the central portion of constant section of the duct 10, a flare of circular cross section, trumpet-shaped, the smallest diameter is equal to r '. In this way, the flaring can simply be achieved by a guide piece formed by machining and placed at the mouth of the duct 10.
  • the central part of the ducts 10 may be made by molding in the material 7, for example a filling mortar, constituting the matrix of the saddle 5.
  • the tube 6 is then provided with negative molds having the shape of the ducts 10. Positions and their transverse spacings are held by guides evenly spaced in the tube 6.
  • the tube 6 is then filled with a hardenable material such as a high strength mortar.
  • the formwork can be made either by mechanical destruction of the molds, or by dissolution or shrinkage.
  • This embodiment of the saddle by molding can be performed in the factory. On site, the saddle thus produced is hoisted on the pylon and put in place at the prescribed position. Once the pylon is completed, the strands 4 of the stay are hoisted, slipped into the saddle 5 and then anchored on the deck 1.
  • An advantage of the saddle 5 described above is that it is compatible with the use of strands 4 constituted by individually wrapped strands.
  • the section of such a strand 4 is shown on the Figures 5 and 6 , where the reference 16 designates the twisted metal son of the strand, and the reference 17 designates the plastic sheath that surrounds these son.
  • the wires 16 are typically made of galvanized steel while the sheath 17 is made of high density polyethylene (HDPE).
  • HDPE high density polyethylene
  • a flexible filling material fills the interstices between the wires 16 and those between the wires 16 and the sheath 17.
  • the sheathed strand 4 shown on the Figures 5 and 6 has a circular outer section.
  • the support zone 11 of the ducts 10 is then dimensioned to have the same radius r as that of the sheathed strand 4.
  • there may be a slight difference in radius between the support zone 11 and the outer section of the strand 4 to the extent that the creep of the plastic material of the sheath 17 pressed against the wall of the conduit remains acceptable.
  • the outer section of the strand 4 is not exactly circular but, for example, hexagonal rounded corners due to the extrusion of the sheath 17 on the metal strand.
  • the "outer diameter of the strand” should be understood as the diameter of the smallest circle in which the cross-section of the strand is inscribed. This definition of "outer diameter of the strand” also applies in the case of a metallic strand unsheathed. Although not preferred, the latter case may fall within the scope of the invention, the contacts between the stretched strand and the support zone 11 of its conduit then being in spiral lines rather than punctual.
  • the deflection device according to the invention can be used to deflect structural cables other than shrouds.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Bridges Or Land Bridges (AREA)
  • Laying Of Electric Cables Or Lines Outside (AREA)
  • Reinforcement Elements For Buildings (AREA)
  • Details Of Indoor Wiring (AREA)
  • Ropes Or Cables (AREA)
EP11811045.1A 2010-12-08 2011-12-07 Dispositif de deviation d'un cable de structure tel qu'un hauban, et ouvrage ainsi equipe Active EP2649239B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL11811045T PL2649239T3 (pl) 2010-12-08 2011-12-07 Urządzenie odchylające linę konstrukcyjną taką jak wanta, i budowla w niego wyposażona

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1060270A FR2968681B1 (fr) 2010-12-08 2010-12-08 Dispositif de deviation d'un cable de structure tel qu'un hauban, et ouvrage ainsi equipe
PCT/FR2011/052897 WO2012076815A2 (fr) 2010-12-08 2011-12-07 Dispositif de deviation d'un cable de structure tel qu'un hauban, et ouvrage ainsi equipe

Publications (2)

Publication Number Publication Date
EP2649239A2 EP2649239A2 (fr) 2013-10-16
EP2649239B1 true EP2649239B1 (fr) 2017-02-08

Family

ID=44512255

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11811045.1A Active EP2649239B1 (fr) 2010-12-08 2011-12-07 Dispositif de deviation d'un cable de structure tel qu'un hauban, et ouvrage ainsi equipe

Country Status (16)

Country Link
US (1) US8959692B2 (ja)
EP (1) EP2649239B1 (ja)
JP (1) JP6177134B2 (ja)
KR (1) KR101928970B1 (ja)
CN (1) CN103476993B (ja)
CA (1) CA2820024C (ja)
DK (1) DK2649239T3 (ja)
ES (1) ES2624267T3 (ja)
FR (1) FR2968681B1 (ja)
HK (1) HK1190764A1 (ja)
HU (1) HUE032808T2 (ja)
MX (1) MX357990B (ja)
PL (1) PL2649239T3 (ja)
PT (1) PT2649239T (ja)
RU (1) RU2594246C2 (ja)
WO (1) WO2012076815A2 (ja)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
PL2703331T3 (pl) * 2012-09-03 2015-06-30 Soletanche Freyssinet System ciągowy stosujący linę wielocięgnową z kątem odchylenia
CN102966040B (zh) * 2012-11-21 2016-02-17 安徽佳路机械制造有限公司 一种斜拉桥索鞍及其制造方法
CN104018433B (zh) * 2014-05-23 2016-04-27 中交隧道工程局有限公司 一种桥梁体外预应力钢索转向靴-外套管转向器
ES2589038B1 (es) * 2015-05-04 2017-09-08 Técnicas Del Pretensado Y Servicios Auxiliares, S.L. Desviador para postesado exterior de viaductos y procedimiento para su fabricación
WO2016180485A1 (en) * 2015-05-12 2016-11-17 Vsl International Ag Cable deviation saddle
CN108239937B (zh) * 2017-09-14 2021-12-28 贵州桥梁建设集团有限责任公司 拱桥塔架自平衡控制方法
WO2022111811A1 (en) 2020-11-27 2022-06-02 Dywidag-Systems International Gmbh Guiding device and combination of a guiding device with at least one strand
AU2022398488A1 (en) * 2021-11-24 2024-06-13 Felix Sorkin Polymer blend cradle for cable-stayed bridge

Family Cites Families (20)

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Publication number Priority date Publication date Assignee Title
US3152668A (en) * 1961-02-23 1964-10-13 Reliable Electric Co Anchor arrangement for the pole end of a guy wire
GB1419997A (en) * 1972-05-08 1976-01-07 Triple Bee Prestress Pty Ltd Device for anchoring or coupling cables
SU992646A1 (ru) * 1981-04-09 1983-01-30 Korneev Mikhail M Узел анкеровки канатов вантового моста
FR2511721A1 (fr) * 1981-08-21 1983-02-25 Freyssinet Int Stup Dispositif de raccordement incurve entre deux portions rectilignes d'un cable tendu
FR2527246A1 (fr) * 1982-05-21 1983-11-25 Freyssinet Int Stup Perfectionnements aux gaines de precontrainte et a leurs procedes de fabrication
US4574545A (en) * 1984-03-30 1986-03-11 Breivik-Reigstad, Inc. Method for installing or replacing tendons in prestressed concrete slabs
CH676617A5 (ja) * 1987-03-13 1991-02-15 Dyckerhoff & Widmann Ag
DE8810423U1 (de) * 1988-08-18 1988-11-10 Dyckerhoff & Widmann AG, 8000 München Vorrichtung zur Auflagerung eines Zugglieds an einer Abstützung
DE3838069C2 (de) * 1988-11-10 1995-12-14 Hochtief Ag Hoch Tiefbauten Transport- und einbetonierfähiges Spannbewehrungsaggregat für das Vorspannen von Stahlbetonbauwerken
FR2656883B1 (fr) 1990-01-11 1992-08-28 Freyssinet Int Stup Perfectionnements aux ponts a haubans et plus particulierement a leurs haubans, pylones et tabliers.
FR2663975B1 (fr) * 1990-06-29 1993-07-09 Freyssinet Int Stup Perfectionnements aux ponts a haubans et plus particulierement a leurs pylones et haubans.
JP2709279B2 (ja) * 1994-12-17 1998-02-04 住友電気工業株式会社 斜張橋の主塔側斜張ケーブル用サドル構造体
JP3840626B2 (ja) * 1998-01-27 2006-11-01 株式会社タイムスエンジニアリング 防錆ｐｃ鋼材設置構造
JP3373426B2 (ja) * 1998-03-31 2003-02-04 神鋼鋼線工業株式会社 斜張橋ケーブル用サドル構造体
EP1013830A1 (fr) * 1998-12-24 2000-06-28 Freyssinet International Stup Dispositif et procédé de fixation entre un element de construction et un cable de structure, et pont suspendu comportant de tels dispositifs
FR2794484B1 (fr) 1999-06-03 2001-08-03 Freyssinet Int Stup Dispositif d'ancrage d'un cable de structure
US6880193B2 (en) * 2002-04-02 2005-04-19 Figg Bridge Engineers, Inc. Cable-stay cradle system
DE202004008620U1 (de) * 2004-06-01 2005-10-13 Dywidag-Systems International Gmbh Ausbildung eines korrisionsgeschützten Zugglieds im Bereich einer an einer Abstützung angeordneten Umlenkstelle, insbesondere eines Schrägseils am Pylon einer Schrägseilbrücke
ES2492568T3 (es) * 2006-04-20 2014-09-09 Vsl International Ag Dispositivo de guiado para torones
KR101757406B1 (ko) * 2010-03-26 2017-07-12 파우에스엘 인터나치오날 아게 향상된 가닥 안내 장치

Also Published As

Publication number Publication date
WO2012076815A2 (fr) 2012-06-14
MX2013006537A (es) 2013-08-01
FR2968681A1 (fr) 2012-06-15
KR20130123415A (ko) 2013-11-12
WO2012076815A3 (fr) 2012-08-09
DK2649239T3 (en) 2017-05-15
EP2649239A2 (fr) 2013-10-16
MX357990B (es) 2018-07-31
FR2968681B1 (fr) 2015-05-29
CN103476993B (zh) 2016-04-06
RU2013131103A (ru) 2015-01-20
PL2649239T3 (pl) 2017-08-31
US20130255170A1 (en) 2013-10-03
US8959692B2 (en) 2015-02-24
CN103476993A (zh) 2013-12-25
JP2013544997A (ja) 2013-12-19
ES2624267T3 (es) 2017-07-13
KR101928970B1 (ko) 2018-12-13
RU2594246C2 (ru) 2016-08-10
CA2820024C (fr) 2018-12-11
HUE032808T2 (en) 2017-11-28
CA2820024A1 (fr) 2012-06-14
HK1190764A1 (zh) 2014-07-11
JP6177134B2 (ja) 2017-08-09
PT2649239T (pt) 2017-05-19

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