EP0896108B1 - Procédé de pose et de mise en tension d'un membre de précontrainte libre, et dispositif pour la mise en oeuvre du procédé - Google Patents

Procédé de pose et de mise en tension d'un membre de précontrainte libre, et dispositif pour la mise en oeuvre du procédé Download PDF

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Publication number
EP0896108B1
EP0896108B1 EP98111670A EP98111670A EP0896108B1 EP 0896108 B1 EP0896108 B1 EP 0896108B1 EP 98111670 A EP98111670 A EP 98111670A EP 98111670 A EP98111670 A EP 98111670A EP 0896108 B1 EP0896108 B1 EP 0896108B1
Authority
EP
European Patent Office
Prior art keywords
tensioning
strand
anchoring
plate
chair
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP98111670A
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German (de)
English (en)
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EP0896108A2 (fr
EP0896108A3 (fr
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.)
DYWIDAG-Systems International GmbH
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Dywidag Systems International GmbH
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
Application filed by Dywidag Systems International GmbH filed Critical Dywidag Systems International GmbH
Publication of EP0896108A2 publication Critical patent/EP0896108A2/fr
Publication of EP0896108A3 publication Critical patent/EP0896108A3/fr
Application granted granted Critical
Publication of EP0896108B1 publication Critical patent/EP0896108B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • 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
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
    • E04G21/12—Mounting of reinforcing inserts; Prestressing
    • 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
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49826—Assembling or joining
    • Y10T29/49863—Assembling or joining with prestressing of part
    • Y10T29/49874—Prestressing rod, filament or strand

Definitions

  • the invention relates to a method for installing and Tensioning a freely tensioned tension member, in particular one Cable-stayed cables for a cable-stayed bridge and one Device for performing the method.
  • Tension members as they are used in the construction industry to anchor Components, especially as stay cables for Cable-stayed bridges used consist of one Bundle of individual elements, such as steel wires or strands.
  • the individual elements are in the free area of the tension member arranged together in a tubular envelope; she become anchored longitudinally by the person concerned Components passed through and at their entry point anchored opposite side.
  • the anchorages consist of anchor plates with holes, through which led the individual elements through and opposite which you e.g. anchored by means of multi-part ring wedges are.
  • the tubular casing can be in the free area of the Tension member made of a plastic tube, e.g.
  • PE polyethylene
  • Anchoring area usually consists of an anchor tube from steel.
  • the cavity between the individual elements and the tubular wrapping can if the individual elements themselves are protected against corrosion, remain unfilled or after clamping the individual elements with a Corrosion protection compound, e.g. Fat, or with a hardening Material, e.g. Cement mortar to be pressed out.
  • a Corrosion protection compound e.g. Fat
  • a hardening Material e.g. Cement mortar
  • a device for slicing a Cladding encasing plastic with a knife with a Cutting edge holding device become known, which in a on the sheathed tendon rotatably arranged housing is arranged (EP 0 715 040 A1).
  • This device can be placed on an already positioned, i.e. H. sheathed tendon inserted into an anchoring device be used that the cutting edge of the knife in the to attach a Anchoring wedge reaches certain conical hole and by turning the device creates an annular cut in the casing so that this after removing the device from the over the Anchoring device protruding end of the tendon deducted can be.
  • the object of the invention to create a way to achieve this goal, the smallest possible distance from the end of the PE jacket the anchoring wedges when the tension member is in use, with the least possible effort and as large as possible To achieve security and tolerances, measurement errors or Exclude the like from the outset.
  • the invention is defined by that in claim 1 Procedural features solved;
  • the invention also relates to a device for performing the method according to Claim 7.
  • the basic idea of the invention is the PE jacket to remove only in the course of the tensioning process, namely at the same time as tensioning the strand in question over the Length of the expansion path that occurs at the end of tensioning. This will cause the geometric uncertainties eliminated that can occur when the PE sheath already is removed before installing the strands.
  • this is at the tensioning end of the strand, ie where the clamping press is used for clamping and the Dehnweg occurs, a peeling tool arranged on the PE sheath that attacks the strand.
  • the peeling tool can simplest case would be a knife or the like with which the PE jacket is slit open during a break; the peeling tool is particularly advantageous from a stationary tool through which the jacket in the elongation of the strand that occurs as a result of tensioning peeled off, at least slit lengthways, so that it then has a simple cross section can be completely detached from the strand and removed.
  • the invention makes partial use of the teaching DE 34 37 108 C2, the device and a method for mounting a generic tension member.
  • a tensioning chair with one in front of the Armature plate lying and using a support structure supported against the component Intermediate anchor plate used.
  • This plate points Bores for the passage and intermediate anchoring of the Individual elements, each on the armature plate facing side of the plate in a fastened to this Pipe piece continues, on each of which a ring wedge below resilient expansion can be pushed.
  • the strands are successful pull in or push in through a ring wedge can without fear that the strands or their coating damaged by the teeth of the wedges or even the wedges prematurely in the conical bore pulled in and thus blocked the strands prematurely would.
  • the invention can also be used to tension the strands such prestressing chair are used, in contrast the Peeling tools are supported.
  • the cutting edge of the peeling tools must be as wide as possible reach up to the surface of the armature plate.
  • the later anchoring wedge Having already available, it can be tubular Peeling tool to be put on when the Peeling process of the strand is finished, through the hole in the support plate of the prestressing chair is withdrawn. In order to there will be space to remove the anchoring wedge from the To be able to push the peeling tool down onto the strand.
  • FIGS. 1 and 2 show the two end anchorages of a stay cable one Cable-stayed bridge, namely anchoring to the - upper - Clamping side A at the top of a pylon and the anchoring on the - lower anchoring side B on the carriageway girder.
  • the stay cable is separated by two strands 1a and 1b symbolizes that in practice part of a bundle of one any number of strands are.
  • the strands 1a, 1b consist of high-strength Steel wires that are galvanized, greased and each with are surrounded by a PE jacket 2a, 2b.
  • a tensioning chair 15 is then mounted on tensioning side A.
  • the tensioning chair 15 consists of a spaced from the Armature plate 8 parallel to this lying chair plate 16, by supports 17 against the abutment plate 6 and so is supported against the building 4.
  • the chair top 16 is, similar to the armature disk 8, with holes 18 provided, in the additional ring wedges 19 are used can.
  • the strands are installed individually. This can be done using one of the known assembly methods take place, e.g. by shooting in or pulling in.
  • the strand 1a is first on the Anchorage side B (Fig. 2) of the wedge 11 set, namely so that a free strand length 1 remains in front of the wedge. Then at the other end the preparations for the Peeled off the PE jacket.
  • the clamping side A (Fig. 1) in Area of the tensioning chair 15 on the stripped area the strand 1a a tubular peeling knife 20 and the one intended for later anchoring of the strand Ring wedge 11 widening to the tubular paring knife 20 postponed. This is on a larger scale in FIG. 3 shown.
  • Such a peeling knife 20 is shown in FIG. 6 in Tilt. It consists of a tube part 21 with at least one cutting edge 22 on the lower and side Approaches 23 at the top, with the help of it bayonet-like in relation to the chair plate 16 can be supported.
  • the tensioning press 14 is placed on the tensioning chair 15 attached to tension the strand 1a.
  • the clamping press 14 Appropriately on the tensioning chair 15 with the help of a small one second tensioning chair 24 supported. This offers the Possibility to use the temporary wedge 19 for a later one To be able to hold back the strand 1a.
  • the strand 1a is connected to the PE jacket 2a through the surrounding peeling knife 20 and pulled through the bore 25 in the armature plate 8.
  • Cutting edge 22 of the peeling knife 20 becomes the PE jacket 2a slit open up to the armature disk 8 and peeled off. A still necessary cross cut to complete The PE jacket 2a can then be removed become.
  • the strand 1a is easily accessible, since that Cross-section of stranded wires seen from bottom to top is built up in layers.
  • the peeling knife 20 is expedient trained that it the blow when pulling the strand following the stranded wires.
  • the paring knife must for this purpose, however, under pressure to its Axis can be rotated; at least its lower edge must be having part opposite its upper, the support effecting part, be rotatable.
  • the strand 1a can Clamping process can also be stripped by hand.
  • the wedge 11 is then placed on a tube surrounding the strand 1a positioned that on the underside of the chair plate 16th is attached.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Bridges Or Land Bridges (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
  • Tension Adjustment In Filamentary Materials (AREA)
  • Coating With Molten Metal (AREA)
  • Ropes Or Cables (AREA)
  • Piles And Underground Anchors (AREA)

Claims (15)

  1. Procédé de pose et de mise en tension d'un membre de précontrainte libre, en particulier d'un hauban pour un pont à haubans, constitué d'un faisceau de torons enveloppés de polyéthylène et formés à partir de fils d'acier, qui sont ancrés à leurs les extrémités respectives au moyen de clavettes dans un disque d'ancrage fixé par rapport à l'édifice, l'enveloppe de polyéthylène des torons étant enlevée dans la zone de l'ancrage, caractérisé en ce que l'enveloppe de polyéthylène (2a, 2b) de chaque toron (1a, 1b) individuel est enlevée sur la longueur de la course d'extension apparaissant lors du serrage sur l'extrémité de serrage (A) dans le cadre du processus de mise en tension.
  2. Procédé selon la revendication 1, caractérisé en ce que l'enveloppe de polyéthylène (2a, 2b) est décortiquée par le coulissement longitudinal apparaissant lors de la tension du toron (1a, 1b) sur l'extrémité de serrage (A) le long d'un outil de décorticage (20) disposé de façon fixe au moins pendant l'opération de mise en tension.
  3. Procédé selon la revendication 1 ou 2, caractérisé en ce que chaque toron (1a, 1b) est ancré d'abord sur une première extrémité (B), puis tendu sur la seconde extrémité (A) opposée, l'enveloppe de polyéthylène (2a, 2b) étant enlevée jusqu'à la surface du disque d'ancrage (8), et ensuite étant ancré également sur cette extrémité en relâchant la force de serrage.
  4. Procédé selon la revendication 3, caractérisé en ce que le toron (1a, 1b) est resserré sur la première extrémité (B) de la course de relâchement qui apparaít lors de l'ancrage sur la seconde extrémité (A).
  5. Procédé selon la revendication 3 ou 4, caractérisé en ce que l'enveloppe de polyéthylène du toron est enlevée sur la première extrémité (B) déjà avant son montage sur une longueur (1) telle qu'un resserrage ultérieur sur cette extrémité est possible sur la longueur correspondante.
  6. Procédé selon la revendication 3, caractérisé en ce que le toron (1a, 1b) est surtendu sur la première extrémité (B) de la course de relâchement qui apparaít lors de l'ancrage sur la seconde extrémité (A).
  7. Dispositif pour appliquer le procédé selon les revendications 1 à 6, dans lequel un outil de décorticage peut être positionné de façon fixe avec une douille pourvue sur une extrémité d'au moins une lame, et entourant le toron respectif sur au moins une partie importante de son pourtour entre le disque d'ancrage et la presse de serrage, caractérisé en ce que le toron (1a, 1b) peut être passé à travers la douille lors de l'opération de mise en tension, l'enveloppe en polyéthylène (2a, 2b) du toron (1a, 1b) pouvant être enlevée par l'outil de décorticage (20) sur la longueur de la course d'extension apparaissant lors du serrage sur l'extrémité de serrage (A) au cours de l'opération de mise en tension.
  8. Dispositif selon la revendication 7, caractérisé en ce que l'outil de décorticage (20) est un tuyau (21) entourant complètement le toron (1a, 1b).
  9. Dispositif selon la revendication 7 ou 8, caractérisé en ce que l'outil de décorticage (20) présente une lame (22) sur l'extrémité tournée vers le toron.
  10. Dispositif selon la revendication 8, caractérisé en ce que au moins la partie de l'outil de décorticage s'appliquant sur l'enveloppe de polyéthylène du toron, est conçue de façon à pouvoir pivoter par rapport à la partie restante.
  11. Dispositif selon l'une quelconque des revendications 7 à 10 avec un support de serrage (15) fixé par rapport à l'édifice (4) avec une plaque de suport (16) disposée à distance du disque d'ancrage (8) pour le soutien de la presse de serrage (14) lors de l'opération de serrage, caractérisé en ce que l'outil de décorticage (20) est disposé entre la plaque d'ancrage (8) et la plaque de support (16) et est fixé par rapport à la plaque de support (16).
  12. Dispositif selon la revendication 11, caractérisé en ce que la longueur de l'outil de décorticage (20) est adaptée à la hauteur du support de serrage (15) de telle sorte que la lame (21) de l'outil de décorticage (20) se situe à peu près au niveau de la surface de la plaque d'ancrage (8).
  13. Dispositif selon la revendication 11 ou 12, caractérisé en ce que la plaque de support (16) est conçue avec des perçages (18) en sièges de clavettes fournies pour l'ancrage intermédiaire des torons (1a, 1b).
  14. Dispositif selon l'une quelconque des revendications 7 à 12, caractérisé en ce que l'outil de décorticage (20) peut être inséré et retiré à travers les perçages (18) dans la plaque de support (16).
  15. Dispositif selon la revendication 14, caractérisé en ce que l'outil de décorticage (20) peut être relié avec la plaque de support (16), ou enlevé de celle-ci, à la façon d'une fermeture à baïonnette.
EP98111670A 1997-08-05 1998-06-25 Procédé de pose et de mise en tension d'un membre de précontrainte libre, et dispositif pour la mise en oeuvre du procédé Expired - Lifetime EP0896108B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19733822A DE19733822A1 (de) 1997-08-05 1997-08-05 Verfahren zum Einbauen und Spannen eines freigespannten Zugglieds und Vorrichtung zum Durchführen des Verfahrens
DE19733822 1997-08-05

Publications (3)

Publication Number Publication Date
EP0896108A2 EP0896108A2 (fr) 1999-02-10
EP0896108A3 EP0896108A3 (fr) 2000-09-27
EP0896108B1 true EP0896108B1 (fr) 2004-04-21

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EP98111670A Expired - Lifetime EP0896108B1 (fr) 1997-08-05 1998-06-25 Procédé de pose et de mise en tension d'un membre de précontrainte libre, et dispositif pour la mise en oeuvre du procédé

Country Status (6)

Country Link
US (1) US6055691A (fr)
EP (1) EP0896108B1 (fr)
JP (1) JP3890148B2 (fr)
AT (1) ATE264962T1 (fr)
DE (2) DE19733822A1 (fr)
ES (1) ES2217458T3 (fr)

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FR2798408B1 (fr) * 1999-09-15 2002-01-18 Freyssinet Int Stup Cable a fils paralleles pour structure d'ouvrage de construction, ancrage d'un tel cable, et procede d'ancrage
DE10062227A1 (de) 2000-12-13 2002-06-20 Dyckerhoff & Widmann Ag Verfahren zum Einbauen und Spannen eines freigespannten Zugglieds, insbesondere eines Schrägseils für eine Schrägseilbrücke sowie Verankerungsvorrichtung zum Durchführen des Verfahrens
FR2818676B1 (fr) * 2000-12-27 2003-03-07 Freyssinet Int Stup Procede de demontage d'un cable de precontrainte et dispositif pour la mise en oeuvre
DK1629154T5 (da) * 2003-06-02 2008-10-27 Freyssinet Fremgangsmåde til forankring af paralleltrådskabler
DE202004008621U1 (de) * 2004-06-01 2005-10-06 Dywidag-Systems International Gmbh Ausbildung eines korrosionsgeschützten Zugglieds im Bereich seines Eintritts in ein Bauwerk, insbesondere eines Schrägseils am Pylon einer Schrägseilbrücke
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KR100949196B1 (ko) * 2009-08-11 2010-03-23 김성희 강연선 재인장 장치
CN101793002B (zh) * 2010-03-29 2012-01-25 中铁二院工程集团有限责任公司 铁路钢桁梁斜拉桥整体复合式索梁锚固结构
CN101864725B (zh) * 2010-07-16 2011-12-28 四川省交通运输厅公路规划勘察设计研究院 Frp筋与钢绞线连接器及复合拉索
CN102003072B (zh) * 2010-10-08 2012-07-04 天津滨海盈信投资有限公司 一种钢绞线编束、穿束施工方法
CN101949218A (zh) * 2010-10-08 2011-01-19 天津滨海盈信投资有限公司 一种钢绞线的编束方法
PL2697447T3 (pl) 2011-04-15 2016-09-30 Sposób ochrony końca liny wielocięgnowej
RU2566882C2 (ru) 2011-04-15 2015-10-27 Солетанш Фрейсине Крепежное устройство для многопрядного троса
CN102704396A (zh) * 2012-06-27 2012-10-03 四川天元机械工程股份有限公司 一种悬索桥主缆锚固方法
CN103866691B (zh) * 2014-03-27 2015-09-09 中交一公局第一工程有限公司 一种大型缆索吊承重索群锚装置
BR112018072943A2 (pt) 2016-05-12 2019-02-19 Fdh Infrastructure Services, Llc dispositivo de destensionamento de haste e métodos de operação do mesmo
CN106284074B (zh) * 2016-08-30 2018-03-16 中铁大桥勘测设计院集团有限公司 一种多面承压抗拔组合传力主缆锚固结构及其施工方法
KR101943955B1 (ko) * 2018-07-04 2019-01-31 세기하이테크건설 주식회사 강성피복 강연선을 이용한 텐던 시공공법
CN109137763B (zh) * 2018-10-29 2023-12-01 招商局重庆交通科研设计院有限公司 拉索切割装置及拉索拆除施工方法
CN109610310B (zh) * 2018-12-12 2023-07-25 湖南大学 适用于悬臂状态的型钢-uhpc组合桥面结构及其施工方法

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Also Published As

Publication number Publication date
US6055691A (en) 2000-05-02
EP0896108A2 (fr) 1999-02-10
DE59811220D1 (de) 2004-05-27
JPH11117229A (ja) 1999-04-27
DE19733822A1 (de) 1999-02-11
EP0896108A3 (fr) 2000-09-27
HK1016671A1 (en) 1999-11-05
ES2217458T3 (es) 2004-11-01
JP3890148B2 (ja) 2007-03-07
ATE264962T1 (de) 2004-05-15

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