EP1181422A1 - Vorrichtung zur verankerung einer kabelstruktur - Google Patents

Vorrichtung zur verankerung einer kabelstruktur

Info

Publication number
EP1181422A1
EP1181422A1 EP00936978A EP00936978A EP1181422A1 EP 1181422 A1 EP1181422 A1 EP 1181422A1 EP 00936978 A EP00936978 A EP 00936978A EP 00936978 A EP00936978 A EP 00936978A EP 1181422 A1 EP1181422 A1 EP 1181422A1
Authority
EP
European Patent Office
Prior art keywords
cable
guide member
guide
tube
anchoring
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
EP00936978A
Other languages
English (en)
French (fr)
Other versions
EP1181422B1 (de
Inventor
Jean-Philippe Fuzier
Jérôme Stubler
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Soletanche Freyssinet SA
Original Assignee
Freyssinet International STUP SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=9546331&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP1181422(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Freyssinet International STUP SA filed Critical Freyssinet International STUP SA
Publication of EP1181422A1 publication Critical patent/EP1181422A1/de
Application granted granted Critical
Publication of EP1181422B1 publication Critical patent/EP1181422B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D19/00—Structural or constructional details of bridges
    • E01D19/16—Suspension cables; Cable clamps for suspension cables ; Pre- or post-stressed cables
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
    • E04C5/08—Members specially adapted to be used in prestressed constructions
    • E04C5/12—Anchoring devices
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T24/00—Buckles, buttons, clasps, etc.
    • Y10T24/39—Cord and rope holders
    • Y10T24/3909—Plural-strand cord or rope

Definitions

  • the present invention relates to devices used for anchoring structural cables used in the construction of engineering structures. It applies in particular to guy lines, prestressing cables and cables for suspension bridges.
  • the shrouds are cables generally intended to transmit tensile forces between two points of a structure where they are anchored. They are therefore in theory rectilinear if we neglect the external effects which tend to curve their trajectory.
  • the constitution of the anchors is generally such that only the tensile force is taken up satisfactorily.
  • the local bending moments caused by the angular deviations mentioned above which could request the anchor are filtered by means of a continuous or isolated guide at the outlet of the anchor and located at an adequate distance to be sufficiently effective.
  • the principle of anchoring is based on the individual wedging of each of the strands constituting the cable. This imposes a certain transverse spacing of the strands at the level of the anchoring block in order to have enough space to arrange the individual wedging means which are generally jaws with frustoconical keys.
  • a diverter gathers the strands in a compact arrangement at a certain distance from the anchor, in order to minimize the overall cross section of the guy line in the current part.
  • the guide which filters the bending moments is located at the level of the deflector which gathers the strands in compact formation (see for example EP-A-0 323 285).
  • the relatively large distance between the guide and the anchoring block (typically more than a meter) is necessary to limit the excessive angular deviations of each strand, which could damage it and become would result in additional bending moments at the anchor block.
  • resuming the bending moments too close to the anchor would allow significant transverse forces to remain at the level of the anchor block.
  • GB-A-2 157 339 describes a stay anchoring device in which a diverter is mounted in two parts in a tube integral with the anchoring block.
  • the part furthest from the anchor block avoids contact of the external strands with the tube, while the part closest to the anchor block prevents the strands from rubbing together when cyclic loads are applied to the stay cable.
  • the bending moments, to which the document does not pay particular attention, are essentially taken up at the part of the deflector furthest from the anchoring block.
  • the shroud crosses downstream of the anchor an orifice which widens towards the main part, and which allows an overall angular deviation of the shroud by taking up the bending forces over the length of the stay zone of the stay cable in the hole (see for example GB-A-2 097 835).
  • An object of the present invention is to provide an anchoring system which limits the bending stresses of the cable to admissible values as soon as it leaves the anchoring. Another object is to possibly make it possible to dispense with an additional external device to take up the bending forces due to variations in the trajectory of the cable.
  • the invention thus provides a device for anchoring a structural cable, comprising an anchoring block traversed by orifices each receiving a strand of the cable and a means for blocking said strand, a support piece for the block anchoring, and means for guiding the strands between the anchoring block and a running part of the cable, connected to the support piece and comprising for each strand of the cable an individual guide conduit allowing angular deviation.
  • Each guide duct flares towards the current part of the cable.
  • the guide conduits have a transverse distribution in the direction of the anchor block aligned with that of the orifices of the anchor block.
  • each guide duct widens in the direction of the current part of the cable according to a radius of curvature which is substantially constant in a plane passing through the axis of said duct.
  • the guide means comprise at least one guide member housed in a tube connected to the support piece, through which the strand guide conduits are formed.
  • the guide member can be located just behind the anchor block, or be spaced a certain distance from the anchor block. In the latter case, provision can be made for the strands of the cable to be individually protected strands in the running part, the individual protection of each strand being interrupted in a chamber located between the guide member and the anchoring block, with sealing means placed between said chamber and the guide member in order to form a sealed separation between the chamber and the running part of the cable and to contain a filling and protective product injected inside the chamber.
  • the device optionally includes a second guide member located between the anchoring block and the sealing means.
  • the guide member may be made of a rigid or deformable material. In the latter case, it is advantageous to leave a clearance, in the direction of the current part of the cable, between the circumference of the guide member and the tube in which it is housed, in order to allow an angular deviation of the set of cable strands by deformation of the material of the guide member.
  • the shape of this game is optimized to provide a regular curvature.
  • the play may result from a flaring of the inner face of the tube in the direction of the current part of the cable, according to a radius of curvature substantially constant in a plane passing through the axis of the tube.
  • the play may result from a narrowing of the periphery of the guide member in the direction of the current part of the cable, according to a radius of curvature substantially constant in a plane passing through the axis of the tube.
  • the play results in part from a narrowing of the periphery of the guide member in the direction of the current part of the cable, and partly a flare of the inner face of the tube towards the current part of the cable.
  • the deformable guide member has a viscosity, in order to provide damping of the cable when the latter oscillates.
  • This viscosity can be intrinsic to the deformable material of the organ, and / or result from a viscous substance contained in cavities formed in this organ.
  • the deformable guide member may comprise, between the guide conduits, inserts of decreasing inertia in the direction of the current part of the cable, which makes it possible to control the curvature undergone by the cable through the member.
  • the tube in which the deformable guide member is housed may have a decreasing inertia in the direction of the current part of the cable.
  • FIG. 1 to 4 are schematic views in longitudinal section of anchoring devices produced in accordance with the invention.
  • FIG. 5 is a longitudinal sectional view of an embodiment of a guide member.
  • the shroud anchored by means of one of the devices described below by way of example consists of a bundle of strands 1, only one of which is drawn in FIG. 1.
  • the strands 1 are of the type individually protected: the assembly of stranded metal wires is coated with a product protecting against corrosion (for example a grease) and contained in an individual sheath 2 of plastic material (for example a high density polyethylene (HDPE)).
  • the anchoring device comprises an anchoring block 3 applied against a support piece 4 along a surface substantially perpendicular to the general direction of the stay. The support piece 4 is applied, opposite the anchor block 3 against the structural element to which the guy wire is attached.
  • the anchoring block 3 is crossed by orifices 5 which have a frustoconical profile which widens towards the face of the block opposite to the support piece 4.
  • Each of the orifices 5 receives a strand 1 as well as a frustoconical jaw 6 who stuck the strand in the hole.
  • the individual protection of each strand in the running part is interrupted in a chamber 7 located behind the anchoring block 3.
  • the jaws 6 directly grip the metal wires of the strands.
  • a filling product for example petroleum wax, grease or resin
  • the end of the chamber 7 opposite the anchoring block 3 is closed by a sealing device 8 which makes sealing around each sheathed strand 1 and at the level of the internal face of the cylindrical tube 10 which delimits the chamber 7.
  • the sealing device 8 can in particular be of stuffing box type, as described in application EP-A- 0 323285.
  • a deflecting member 11 gathers the strands 1 in a more compact formation than in the anchoring, in order to minimize the overall cross section of the shroud in the running part. There is therefore a slight angular convergence of the strands 1 of the anchoring device towards the deflecting member 11.
  • the anchoring device shown in Figure 1 comprises a guide member 12 housed inside the aforementioned tube 10.
  • This tube 10 is connected to the support piece 4. It can for example be in one piece with this piece 4, as shown, or with the pieces 4 and 3, or even fixed to an anchoring yoke.
  • the guide member 12 is constituted by a rigid cylindrical block (for example made of HDPE) inserted substantially without play in the tube 10.
  • Individual conduits 13 are formed in this block 12 to allow passage and guide each of the strands 1.
  • the conduits 13 are circular with a diameter corresponding to that of the individually protected strands 1, and their transverse distribution is the same as that of the orifices 5 in the anchoring block 3.
  • each guide duct 13 In the direction of the running part of the shroud, each guide duct 13, whose general shape is of revolution, flares according to a profile which, in a plane passing through the axis of the duct, has a constant radius of curvature R.
  • This curvature allows the angular deflection of the strand towards the deflecting member 11, and also authorizes overall bending movements of the shroud.
  • the bending moments are taken up by the guide member 12 over the length of the zone where the strand 1 is in contact with the wall of its duct.
  • the guide member 15, 17 is made of a deformable material such as "Neoprene".
  • This material can advantageously have visco-elastic properties in order to participate in the damping of the vibrations of the cable, the viscosity providing a dissipation of the vibratory energy.
  • the conduits 16 formed for the strands in the guide member made of deformable material 15, 17 widen towards the main part of the stay cable with a radius of curvature R 2 which may be greater than the radius R of the embodiment according to FIG. 1.
  • This radius R 2 is determined as a function of the angular deviation due to the convergence of the strands towards the deflecting member 11.
  • this angular deviation may correspond to a tangent of the order of 2% , the radius R2 and the axial length L of the guide member then being chosen so that the half-angle of the mouth of the conduit 16 towards the main part of the stay has a tangent slightly greater than 2%.
  • a clearance J is present between the internal face of the tube 10 and the periphery of the guide member 15, 17 in the direction of the current part of the stay cable. , and this over the entire circumference of the member 15, 17. Thanks to this clearance J, the material of the member 15, 17 can deform overall by following the bending movements of the stay.
  • the clearance J is preferably defined by a curvature of constant radius
  • This radius R. is determined, with the length L, depending on the extent of the flexions to which the shroud can be subjected.
  • R 3 a maximum radius of curvature defined by a combination of R 1 and R 2 , such that R 3 ⁇ R-
  • This radius R 3 can be of the same order as the radius R of FIG. 1. In the example of FIG.
  • the curvature of radius R 1 is formed on the internal face of revolution of the tube 10, which widens in the direction of the running part of the stay, the periphery of the guide member 15 being cylindrical.
  • the curvature of radius Ri is defined on the periphery of revolution of the guide member made of deformable material 17, which narrows in the direction of the current part of the shroud, the internal face of the tube 10 being cylindrical.
  • the clearance J results from a combination of curvatures of the internal face of the tube 10 (FIG. 2) and of the periphery of the member made of deformable material (FIG. 3).
  • the guide means comprise two members made of deformable material, one 20 placed between the anchoring block 3 and the sealing device 8, and the other 22 placed beyond the sealing device 8.
  • Each guide duct receiving a strand then comprises a cylindrical portion 21, of diameter corresponding to that of the strand, formed in the member 20, and a portion 23 formed in the member 22 and which widens towards the running part of the shroud according to the radius of curvature R 2 .
  • the member 20 is housed in the cylindrical tube 10, which holds it in place on the side of the block 3. Towards the main part, the periphery of the member 20 tightens according to the radius of curvature R- j in order to resume movement bending.
  • the member 22, which can be fixed to the sealing device 8, comprises the portions of conduit 23 which widen along the radius of curvature R 2 towards the main part to allow the strands to converge towards the deflecting member 11.
  • the clearance J is created in the same mode as in FIG. 3, by curvature towards the inside of the periphery of the deformable member.
  • the clearance J could be created, in whole or in part, by an outward curvature (according to FIG. 2) of the inner face of the tube 10 in line with the member 20 adjacent to the anchoring block .
  • the tube connected to the support piece 4 has two successive portions 10a, 10b.
  • the cylindrical portion 10a contains the sealing device.
  • the portion 10b mounted in cantilever, contains the deformable guide member 15 which may have a constitution similar to that of FIG. 2.
  • the inertia of this portion 10b decreases in the direction of the current part of the shroud, which allows progressive bending of the cable and of the guide member.
  • the decreasing inertia is made by reducing the thickness of the wall of the tube portion 10b (we could also play on the properties of the material).
  • the progressive bending of the cable and of the deformable guide member 25 results from the decreasing inertia, in the direction of the current part of the stay, of inserts 27 placed in the deformable material between the conduits guide 26.
  • inserts 27 are for example metallic and tapered. They can be connected to a common support located on the side of the member 25 directed towards the anchoring block.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Bridges Or Land Bridges (AREA)
  • Piles And Underground Anchors (AREA)
  • Flexible Shafts (AREA)
  • Reinforcement Elements For Buildings (AREA)
  • Laying Of Electric Cables Or Lines Outside (AREA)
  • Ropes Or Cables (AREA)
EP00936978A 1999-06-03 2000-05-30 Vorrichtung zur verankerung einer kabelstruktur Expired - Lifetime EP1181422B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR9907016 1999-06-03
FR9907016A FR2794484B1 (fr) 1999-06-03 1999-06-03 Dispositif d'ancrage d'un cable de structure
PCT/FR2000/001479 WO2000075453A1 (fr) 1999-06-03 2000-05-30 Dispositif d'ancrage d'un cable de structure

Publications (2)

Publication Number Publication Date
EP1181422A1 true EP1181422A1 (de) 2002-02-27
EP1181422B1 EP1181422B1 (de) 2003-04-02

Family

ID=9546331

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00936978A Expired - Lifetime EP1181422B1 (de) 1999-06-03 2000-05-30 Vorrichtung zur verankerung einer kabelstruktur

Country Status (13)

Country Link
US (1) US6748708B1 (de)
EP (1) EP1181422B1 (de)
JP (1) JP3884289B2 (de)
AT (1) ATE236314T1 (de)
AU (1) AU771495B2 (de)
DE (1) DE60001936T2 (de)
DK (1) DK1181422T3 (de)
ES (1) ES2194738T3 (de)
FR (1) FR2794484B1 (de)
HK (1) HK1044580A1 (de)
MX (1) MXPA01012440A (de)
PT (1) PT1181422E (de)
WO (1) WO2000075453A1 (de)

Cited By (2)

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Publication number Priority date Publication date Assignee Title
WO2012079625A1 (de) 2010-12-15 2012-06-21 Bbr Vt International Ltd. Vorrichtung zum verankern einer mehrzahl von seilsträngen eines seilbündels
US9850630B2 (en) 2013-05-31 2017-12-26 Vsl International Ag Cable anchorage with bedding material

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US7984542B1 (en) 2007-02-26 2011-07-26 Tillitski Stephan W Multi-strand cable termination means
US20090022551A1 (en) * 2007-07-22 2009-01-22 Thomas Raymond Beidle Method and apparatus providing internal structural reinforcements for canal and levee walls
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FR2968681B1 (fr) 2010-12-08 2015-05-29 Soletanche Freyssinet Dispositif de deviation d'un cable de structure tel qu'un hauban, et ouvrage ainsi equipe
US8621725B2 (en) * 2011-12-07 2014-01-07 Horsepower Electric Inc. Large wire anti-theft device
KR101491499B1 (ko) 2012-12-28 2015-02-11 재단법인 포항산업과학연구원 케이블용 정착장치
CN103088547B (zh) * 2013-01-30 2014-06-18 建科机械（天津）股份有限公司 一种钢绞线材梳编束生产线
US9257760B2 (en) 2013-03-14 2016-02-09 Hubbell Incorporated Stranded composite core compression connector assembly
DE102013215136A1 (de) 2013-08-01 2015-02-05 Dywidag-Systems International Gmbh Korrosionsgeschütztes Zugglied und plastisch verformbare Scheibe aus Korrosionsschutzmaterial für ein derartiges Zugglied
CN103835237B (zh) * 2014-03-04 2015-09-09 浙江省交通规划设计研究院 一种悬索桥的防滑索鞍结构
SG11201608865QA (en) * 2014-04-22 2016-11-29 Richard V Campbell Advanced stranded cable termination methods and design
CN104060525B (zh) * 2014-06-28 2016-04-13 苏交科集团股份有限公司 钢绞线夹片锚附加锚固装置、张拉工具和安装方法
EP3289136A4 (de) * 2015-04-27 2019-01-30 Richard V. Campbell Erweiterte verfahren und entwürfe zum auswuchten einer litzenabschlussanordnung
RU2661514C2 (ru) * 2016-07-25 2018-07-17 Общество с ограниченной ответственностью "Следящие тест-системы" Анкерное устройство
FR3069555A1 (fr) 2017-07-28 2019-02-01 Soletanche Freyssinet Ensemble ameliore comprenant un cable de structure et un dispositif de deviation
CN109958232B (zh) * 2019-03-11 2021-05-25 中国建筑第八工程局有限公司 预应力锚具紧固装置及其使用方法
CN111119055A (zh) * 2019-09-12 2020-05-08 中电建路桥集团有限公司 一种用于后张法预应力的扣件式快速封锚装置
CN111827078B (zh) * 2020-07-28 2022-03-15 浙江数智交院科技股份有限公司 一种带波形纵隔板的防滑索鞍结构

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012079625A1 (de) 2010-12-15 2012-06-21 Bbr Vt International Ltd. Vorrichtung zum verankern einer mehrzahl von seilsträngen eines seilbündels
US9850630B2 (en) 2013-05-31 2017-12-26 Vsl International Ag Cable anchorage with bedding material

Also Published As

Publication number Publication date
DE60001936T2 (de) 2004-02-12
WO2000075453A1 (fr) 2000-12-14
DE60001936D1 (de) 2003-05-08
JP2003501571A (ja) 2003-01-14
MXPA01012440A (es) 2003-10-14
PT1181422E (pt) 2003-08-29
DK1181422T3 (da) 2003-07-28
JP3884289B2 (ja) 2007-02-21
AU5228300A (en) 2000-12-28
HK1044580A1 (en) 2002-10-25
FR2794484A1 (fr) 2000-12-08
ATE236314T1 (de) 2003-04-15
AU771495B2 (en) 2004-03-25
US6748708B1 (en) 2004-06-15
EP1181422B1 (de) 2003-04-02
ES2194738T3 (es) 2003-12-01
FR2794484B1 (fr) 2001-08-03

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