EP0566463A1 - Verbesserungen an vorgespannten Betonbauwerken unter Verwendung von geschmierten und beschichteten Litzen - Google Patents

Verbesserungen an vorgespannten Betonbauwerken unter Verwendung von geschmierten und beschichteten Litzen Download PDF

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Publication number
EP0566463A1
EP0566463A1 EP93400941A EP93400941A EP0566463A1 EP 0566463 A1 EP0566463 A1 EP 0566463A1 EP 93400941 A EP93400941 A EP 93400941A EP 93400941 A EP93400941 A EP 93400941A EP 0566463 A1 EP0566463 A1 EP 0566463A1
Authority
EP
European Patent Office
Prior art keywords
concrete
strands
formwork
mass
greased
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
EP93400941A
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English (en)
French (fr)
Other versions
EP0566463B1 (de
Inventor
Jean-François Nieto
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.)
Freyssinet International STUP 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
Application filed by Freyssinet International STUP SA filed Critical Freyssinet International STUP SA
Publication of EP0566463A1 publication Critical patent/EP0566463A1/de
Application granted granted Critical
Publication of EP0566463B1 publication Critical patent/EP0566463B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B23/00—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects
    • B28B23/02—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects wherein the elements are reinforcing members
    • B28B23/04—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects wherein the elements are reinforcing members the elements being stressed
    • B28B23/046—Post treatment to obtain pre-stressed articles
    • 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
    • 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

Definitions

  • the invention relates to prestressed concrete structures implementing the post-tensioning of a plurality of strands of the so-called "greased sheathed" type or the like.
  • each of these strands 4 is constituted by a cable or bundle of metallic wires 5 disposed in a sheath 6, generally made of high density polyethylene, with the interposition of a lubricant such as a grease 7 making possible the relative sliding of the cable in its sheath.
  • a lubricant such as a grease 7
  • Each end of the tube 3 is connected, by means of a tubular connection 8, to a trumpet 9 -which will be designated in the following by the term "tromplaque" usually used by technicians-, which opens out of the formwork through an appropriate opening 10 thereof, the periphery of the trochot plate being fixed to the edge of said hole in a manner sealed to concrete during its casting, in particular using threaded rod nut systems 11.
  • the said formwork After pouring the concrete into the formwork, then taking this concrete, the said formwork is released, and the strands 4 are placed in the hollow housing, in particular in a disordered manner.
  • each hole 10 is closed using a stuffing box cover 12 drilled so as to receive in a classified and sealed manner the sheathed ends of the different sections 4 put in place.
  • FIG. 1 shows the formwork 1 and the stuffing box cover 12. But in reality their respective positions are generally successive and not simultaneous, the formwork not being able to be drilled at right of the tromplaque 9, and the cover 12 can be fixed on this tromplaque by the same systems 11 as the formwork, after release of the latter].
  • the fine grout 13 forms a solid mass in which the strands 4 are intimately embedded except for their ends, which reinforces the protection, of the metal cables 5, already due to the presence of the sheaths 6 which surround them, while making possible the subsequent relative longitudinal sliding of these cables in their sheaths, sliding which occur during the subsequent tensioning of said cables.
  • the gland covers 12 are released and the cables are tensioned by applying tensile forces to the ends, of the strands 4, which protrude out of the one-piece block formed by the masses hardened concrete 2 and grout 13.
  • the second phase is for example carried out in the manner which will be described in more detail below in the context of the description of a complete embodiment of the present invention: Indeed, with regard to this second phase, the present invention does not differ from the prior art considered here.
  • the invention provides a solution which makes it possible to eliminate these various elements and even, in addition, in certain cases, the trochot 9 itself.
  • the prestressed concrete structures according to the invention also comprise a plurality of greased sheathed strands intimately embedded in a hardened mass over their entire length, with the exception of their stripped ends, which protrude out of this mass in positions slightly spaced transversely from each other, and they are essentially characterized in that said mass is exclusively constituted by the hardened concrete constituting the main part of the work.
  • the invention includes, apart from these main provisions, certain other provisions which are preferably used at the same time and which will be more explicitly discussed below.
  • FIGS. 1 and 2 of these drawings have already been mentioned previously with reference to the prior art.
  • FIG. 3, of said drawings schematically illustrates the first phase of a method of building a prestressed structure according to the invention.
  • FIGS 4, 5, 6 and 7 schematically show the four steps making up the second phase of this process.
  • Figure 8 shows a variant of Figure 3.
  • strands 4 in question are put directly into place inside the formwork 1, in particular by orienting them along parallel sheets with the interposition of metal bars 14 of spacing and of support themselves supported by the formwork.
  • This plate 16 can be fixed in any desirable manner to the ring 15 and / or to the formwork 1, for example using the systems 11 themselves or using legs, bent or not, fixed on the formwork using said systems.
  • the lights 17 are suitable for receiving the ends of the strands 4 with a small play visible at j which is compatible with a seal of the bushings considered with respect to the poured concrete.
  • the concrete during casting is advantageously subjected to vibrations, in particular by subjecting the formwork itself 1 to vibrations or, if this is not possible, by transferring to the concrete the vibrations applied to needles. introduced into it.
  • each strand can be carried out similarly at its two ends or, more simply, it is carried out at only one end of the strand in question, its other end being simply anchored.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Reinforcement Elements For Buildings (AREA)
  • Ropes Or Cables (AREA)
  • Forms Removed On Construction Sites Or Auxiliary Members Thereof (AREA)
  • Piles And Underground Anchors (AREA)
EP93400941A 1992-04-15 1993-04-09 Verbesserungen an vorgespannten Betonbauwerken unter Verwendung von geschmierten und beschichteten Litzen Expired - Lifetime EP0566463B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9204636A FR2690189B1 (fr) 1992-04-15 1992-04-15 Perfectionnements aux ouvrages en beton precontraint a l'aide de torons gaines graisses et a leurs procedes de construction.
FR9204636 1992-04-15

Publications (2)

Publication Number Publication Date
EP0566463A1 true EP0566463A1 (de) 1993-10-20
EP0566463B1 EP0566463B1 (de) 1998-05-27

Family

ID=9428905

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93400941A Expired - Lifetime EP0566463B1 (de) 1992-04-15 1993-04-09 Verbesserungen an vorgespannten Betonbauwerken unter Verwendung von geschmierten und beschichteten Litzen

Country Status (5)

Country Link
EP (1) EP0566463B1 (de)
AT (1) ATE166690T1 (de)
DE (1) DE69318754T2 (de)
ES (1) ES2115736T3 (de)
FR (1) FR2690189B1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017002069A1 (en) 2015-07-01 2017-01-05 Vsl International Ag Anchorage assembly for a structure, concrete structure with such an assembly, and manufacturing method of such a concrete structure

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2783266B1 (fr) 1998-09-16 2000-12-15 Spie Precontrainte Organe d'ancrage remplacable, dispositif de protection mixte , systeme de precontrainte exterieure remplacable et ouvrage
DE202009013196U1 (de) 2009-09-28 2011-04-28 Dettke, Christa Elektrostatische Druckhilfe
DE202014001408U1 (de) 2014-02-13 2014-02-25 Eltex Elektrostatik Gmbh Elektrostatische Druckhilfe für eine Rotationsdruckvorrichtung

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB105927A (en) * 1916-04-26 1918-01-31 Emilio Luling Improvements in or relating to the Construction of Beams or Girders.
FR2194212A5 (de) * 1972-07-27 1974-02-22 Uti
US4442646A (en) * 1980-10-28 1984-04-17 Ponteggi Est S.P.A. Device for anchoring tensioning elements
EP0129976A2 (de) * 1983-05-25 1985-01-02 PSC Freyssinet Limited Spanngliedverbesserungen für nachgespannte Bauwerke aus Spannbeton
FR2579236A1 (fr) * 1985-03-19 1986-09-26 Elf France Cable de precontrainte prefabrique et son procede de fabrication
EP0198398A2 (de) * 1985-04-08 1986-10-22 Sumitomo Electric Industries Limited Vorspannstahlkörper
FR2638771A1 (fr) * 1988-11-10 1990-05-11 Hochtief Ag Hoch Tiefbauten Construction en beton arme comprenant au moins une unite d'armature de precontrainte constituee de differents elements de precontrainte directement betonnes et d'un systeme d'ancrage du cote terminal

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB105927A (en) * 1916-04-26 1918-01-31 Emilio Luling Improvements in or relating to the Construction of Beams or Girders.
FR2194212A5 (de) * 1972-07-27 1974-02-22 Uti
US4442646A (en) * 1980-10-28 1984-04-17 Ponteggi Est S.P.A. Device for anchoring tensioning elements
EP0129976A2 (de) * 1983-05-25 1985-01-02 PSC Freyssinet Limited Spanngliedverbesserungen für nachgespannte Bauwerke aus Spannbeton
FR2579236A1 (fr) * 1985-03-19 1986-09-26 Elf France Cable de precontrainte prefabrique et son procede de fabrication
EP0198398A2 (de) * 1985-04-08 1986-10-22 Sumitomo Electric Industries Limited Vorspannstahlkörper
FR2638771A1 (fr) * 1988-11-10 1990-05-11 Hochtief Ag Hoch Tiefbauten Construction en beton arme comprenant au moins une unite d'armature de precontrainte constituee de differents elements de precontrainte directement betonnes et d'un systeme d'ancrage du cote terminal

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017002069A1 (en) 2015-07-01 2017-01-05 Vsl International Ag Anchorage assembly for a structure, concrete structure with such an assembly, and manufacturing method of such a concrete structure

Also Published As

Publication number Publication date
ES2115736T3 (es) 1998-07-01
ATE166690T1 (de) 1998-06-15
EP0566463B1 (de) 1998-05-27
FR2690189B1 (fr) 1998-11-13
FR2690189A1 (fr) 1993-10-22
DE69318754T2 (de) 1998-11-12
DE69318754D1 (de) 1998-07-02

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