EP0722024B1 - Membre tendu libre protégé contre la corrosion, notamment membre de précontrainte pour béton précontraint sans adhérence - Google Patents

Membre tendu libre protégé contre la corrosion, notamment membre de précontrainte pour béton précontraint sans adhérence Download PDF

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Publication number
EP0722024B1
EP0722024B1 EP96100100A EP96100100A EP0722024B1 EP 0722024 B1 EP0722024 B1 EP 0722024B1 EP 96100100 A EP96100100 A EP 96100100A EP 96100100 A EP96100100 A EP 96100100A EP 0722024 B1 EP0722024 B1 EP 0722024B1
Authority
EP
European Patent Office
Prior art keywords
tension member
member according
sheathing
tension
annular space
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
EP96100100A
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German (de)
English (en)
Other versions
EP0722024A1 (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 G.M.B.H.
Original Assignee
Dyckerhoff and Widmann AG
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Filing date
Publication date
Application filed by Dyckerhoff and Widmann AG filed Critical Dyckerhoff and Widmann AG
Publication of EP0722024A1 publication Critical patent/EP0722024A1/fr
Application granted granted Critical
Publication of EP0722024B1 publication Critical patent/EP0722024B1/fr
Anticipated expiration legal-status Critical
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Classifications

    • 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
    • E04C5/10—Ducts
    • 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

Definitions

  • the invention relates to a corrosion-protected free Tension member, in particular a tendon for prestressed concrete without Composite, of at least two within a tubular Sheathing arranged tensile elements, such as steel rods, -wires or strands, at least in its course is redirected once.
  • Prestressing When erecting prestressed concrete structures, Prestressing is known, particularly in bridge structures with and without composite. Prestressing with composite is usually considered Preload with subsequent bond.
  • the tendons within the concrete cross section Stretching channels guided longitudinally, after hardening of the Concrete tensioned and anchored to the building as well by injecting cement paste into the tensioning channels Brought together with the building. With preload without The tendons are usually outside the Concrete cross section, however, are opposite the building supported; they can be viewed and retightened at any time and, if necessary, also be replaced.
  • the object of the invention under consideration of the requirements of the Corrosion protection a more economical design for free Specify tendons at their deflection points.
  • the inventive design of the tension member is limited but not only in the design of the deflection points its course. Rather, it can be used as needed, e.g. with increased mechanical protection or Fire protection requirements, just as well on the free Distance, i.e. next to the deflection points in the rest Use areas of the tension member, but also in direct connection to an anchor at the end of the Tension member.
  • the envelope 4 consists here of an outer Sheath 5 made of plastic, e.g. Polyethylene, with smooth Surface, and one within it within a short distance of which is arranged inner jacket 6 with a Cross-ribbed tube, which is also made of plastic or can also consist of sheet metal.
  • annular space 7 Between the outer jacket 5 and the inner jacket 6 This creates an annular space 7. At a defined distance between the outer and inner sheaths 5 and 6 respectively ensure spacers 8 are arranged.
  • the Spacers 8 are annular and with Breakthroughs or recesses, primarily on their outer edge touching the outer jacket 5 to the passage of the to be pressed into the annular space 7 Material.
  • the Annulus 7 At the front is the Annulus 7 each closed by a sealing ring 9.
  • a flowable hardening material such as. Inject cement or synthetic resin mortar.
  • the sheath 4 closes at both ends tight, e.g. by means of electric welding sleeves 10 to which Piping 11 on the free length of the tension member 1. Forces, the tensioning of the tension elements 12 on the inner jacket 6 the envelope 4 act and thus a shift of the inner Mantle 6 could cause over one non-positive connection between the inner jacket 6 and the piping 11 removed over this.
  • a tension member 1 according to the invention When installing a tension member 1 according to the invention in a Concrete structure is usually the area of the deflection point manufactured first.
  • the method of installation is in the Fig. 3 and 4 and 5 and 6 illustrates, but on Example of a saddle 2a formed on the structure symmetrically guided tension member 1.
  • the tensioning channel is first concreted in curved formwork tube 13 formed.
  • this Formwork tube 13 is then the tubular casing 4, consisting of the outer jacket 5 and the inner jacket 6 inserted.
  • the distance between the inner jacket 6 and the outer jacket 5 is secured by spacers which 3 as helix 14 are formed.
  • the individual Tension elements 12 usually steel wire strands, introduced and the piping 11 in the area of the free length of the Tendon to the sheathing 4 in the deflection area connected.
  • the tension elements 12 are located at the deflection point due to the forced change of direction close to the Inner surface of the inner shell 6 and so press the Envelope 4 in the deflection area against the formwork tube 13 or the concrete component.
  • the cavity 18 within the envelope 4 can, if the individual tension elements 12 made of so-called fat strands persist, remain free; it is bare, so strands not protected by fat and a covering, so this cavity must also be filled with anti-corrosion compound become.
  • the deflection Vent line 19 with a vent opening 20 provided through an opening in the piping 11 after is led outside.
  • spacers 21 that spring apart at intervals arranged.
  • These spacers 21 can be made, for example short sections of a plastic pipe that consist allow to compress in the manner shown in FIG. 6 and so the vent line 19 in the apex of the casing 4th hold.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Reinforcement Elements For Buildings (AREA)

Claims (13)

  1. Organe de tension libre protégé contre la corrosion (1), en particulier élément de précontrainte pour le béton précontraint sans adhérence, se composant d'au moins deux éléments de tension (12) disposés à l'intérieur d'une enveloppe tubulaire (4), tels que des tiges, des fils ou des torons en acier, dont le profil est coudé au moins une fois, caractérisé en ce que l'enveloppe (4) se compose au moins au niveau des parties coudées d'une gaine extérieure (5) et d'une gaine intérieure (6) maintenue par celle-ci à une faible distance, et en ce que l'espace annulaire (7) résultant est rempli d'un matériau durcissant.
  2. Organe de tension selon la revendication 1, caractérisé en ce que la gaine extérieure (5) se compose d'un tube présentant une surface lisse.
  3. Organe de tension selon la revendication 1 ou 2, caractérisé en ce que la gaine intérieure (6) se compose d'un tube qui est muni de nervures s'étendant de manière transversale par rapport à son axe longitudinal.
  4. Organe de tension selon l'une quelconque des revendications 1 à 3, caractérisé en ce que des pièces d'écartement (8) sont dosposées pour fixer la distance entre la gaine extérieure (5) et la gaine intérieure (6).
  5. Organe de tension selon la revendication 4, caractérisé en ce que les pièces d'écartement sont de forme annulaire et présentent des alésages et/ou des évidements.
  6. Organe de tension selon la revendication 4, caractérisé en ce que la pièce d'écartement est une hélice (14) en fil d'acier.
  7. Organe de tension selon l'une quelconque des revendications 1 à 6, caractérisé en ce que l'espace annulaire situé entre la gaine intérieure (6) et la gaine extérieure (5) est fermé hermétiquement au niveau de sa face avant au moyen de joints d'étanchéité (9).
  8. Organe de tension selon l'une quelconque des revendications 1 à 7, caractérisé en ce que le matériau durcissant situé dans l'espace annulaire (7) est du mortier à base de ciment ou de résine synthétique.
  9. Organe de tension selon l'une quelconque des revendications 1 à 8, caractérisé en ce que le matériau durcissant situé dans l'espace annulaire (7) est armé.
  10. Organe de tension selon l'une quelconque des revendications 1 à 9, caractérisé en ce que l'enveloppe (4) se compose d'un matériau flexible.
  11. Organe de tension selon l'une quelconque des revendications 1 à 10, caractérisé en ce que l'espace annulaire compris entre la gaine intérieure (6) et les différents éléments de tension (12) est rempli d'une masse de remplissage.
  12. Organe de tension selon l'une quelconque des revendications 1 à 11, caractérisé en ce que l'enveloppe (4) est reliée hermétiquement au tubage de raccordement (11) de l'organe de tension (1).
  13. Organe de tension selon l'une quelconque des revendications 1 à 12, caractérisé en ce que la gaine extérieure (5) de l'enveloppe (4) est assemblée au tubage (11) par adhérence.
EP96100100A 1995-01-14 1996-01-05 Membre tendu libre protégé contre la corrosion, notamment membre de précontrainte pour béton précontraint sans adhérence Expired - Lifetime EP0722024B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE29500560U DE29500560U1 (de) 1995-01-14 1995-01-14 Korrosionsgeschütztes freies Zugglied, vornehmlich Spannglied für Spannbeton ohne Verbund
DE29500560U 1995-01-14

Publications (2)

Publication Number Publication Date
EP0722024A1 EP0722024A1 (fr) 1996-07-17
EP0722024B1 true EP0722024B1 (fr) 1999-02-24

Family

ID=8002514

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96100100A Expired - Lifetime EP0722024B1 (fr) 1995-01-14 1996-01-05 Membre tendu libre protégé contre la corrosion, notamment membre de précontrainte pour béton précontraint sans adhérence

Country Status (3)

Country Link
EP (1) EP0722024B1 (fr)
JP (1) JP2796566B2 (fr)
DE (2) DE29500560U1 (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19634682C2 (de) * 1996-08-28 1999-07-08 Dyckerhoff & Widmann Ag Dichtung zur Begrenzung von mit einer Vergußmasse auszufüllenden Bereichen an einem Bündelzugglied für Spannbeton
DE19743876A1 (de) * 1997-10-04 1999-04-29 Bilfinger Berger Bau Spannglied
DE19845200C2 (de) * 1998-10-01 2002-09-26 Bilfinger Berger Ag Hüllrohr für ein Spannglied ohne Verbund
DE19858001A1 (de) * 1998-12-16 2000-06-21 Bilfinger Berger Bau Externes Spannglied
DE10134777B4 (de) * 2001-07-06 2008-11-20 Martin Krone Bauwerk und Verfahren zu seiner Herstellung
CN1710207B (zh) * 2005-07-11 2010-11-03 上海市政工程设计研究院 一种钢绞线后张预应力孔道压浆方法
KR101732564B1 (ko) * 2010-08-03 2017-05-04 소레탄체 프레씨네트 스트랜드, 구조용 케이블 및 스트랜드 제조방법
CN109162206A (zh) * 2018-10-30 2019-01-08 中国十七冶集团有限公司 一种现浇箱梁预应力钢束的施工结构及其施工方法
CN112049027A (zh) * 2020-09-04 2020-12-08 上海市机械施工集团有限公司 预应力孔道的补救方法

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH299955A (de) * 1950-07-18 1954-07-15 Baur Willi Verfahren zum Herstellen von Bauteilen aus Spannbeton.
DE1130988B (de) * 1956-12-10 1962-06-07 Rudolf Buehrer Dipl Ing Spannglied aus mehreren Einzeldraehten oder -staeben
US3060640A (en) * 1959-06-11 1962-10-30 Span Tendons Ltd Cables for prestressing concrete
FR1587229A (fr) * 1968-10-25 1970-03-13
DE8716677U1 (fr) * 1987-03-13 1988-02-11 Dyckerhoff & Widmann Ag, 8000 Muenchen, De
DE3734953C2 (de) * 1987-03-13 1994-02-24 Dyckerhoff & Widmann Ag Abstandhalter für ein spannbares Zugglied
DE3731722A1 (de) * 1987-09-21 1989-04-06 Suspa Spannbeton Gmbh Umlenkkoerper fuer spannelemente eines spanngliedes zur vorspannung von spannbetontragwerken
DE3831069A1 (de) * 1988-09-13 1990-03-22 Dyckerhoff & Widmann Ag Zugglied mit einer ummantelung und verfahren zu seiner herstellung
FR2662725A1 (fr) * 1990-05-31 1991-12-06 Dyckerhoff & Widmann Ag Procede de fabrication d'un membre tendu compose d'un faisceau d'elements.
DE4118897A1 (de) * 1991-06-08 1992-12-10 Hochtief Ag Hoch Tiefbauten Bauwerkslagereinrichtung fuer ein spannglied und verfahren zum auswechseln eines solchen spanngliedes

Also Published As

Publication number Publication date
JPH08253982A (ja) 1996-10-01
JP2796566B2 (ja) 1998-09-10
EP0722024A1 (fr) 1996-07-17
DE29500560U1 (de) 1996-05-15
DE59601319D1 (de) 1999-04-01

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