EP0566463B1 - 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
EP0566463B1
EP0566463B1 EP93400941A EP93400941A EP0566463B1 EP 0566463 B1 EP0566463 B1 EP 0566463B1 EP 93400941 A EP93400941 A EP 93400941A EP 93400941 A EP93400941 A EP 93400941A EP 0566463 B1 EP0566463 B1 EP 0566463B1
Authority
EP
European Patent Office
Prior art keywords
concrete
strands
formwork
block
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.)
Expired - Lifetime
Application number
EP93400941A
Other languages
English (en)
French (fr)
Other versions
EP0566463A1 (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
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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 concrete structures prestressed using the post-tension of a plurality of strands of the so-called "greased sheathed" type or analogues.
  • each of these strands 4 is constituted by a cable or bundle of metallic wires 5 arranged in a sheath 6, generally made of high density polyethylene, with interposition of a lubricant such as a grease 7 making possible relative slippage of the cable in its sheath.
  • a lubricant such as a grease 7
  • Each end of the tube 3 is connected, by via a tubular connector 8, to a trumpet 9 -which will be designated in the following by the term "tromplaque" usually used by technicians- which opens to the outside of the formwork through an opening appropriate 10 of it, the perimeter of the trochot being attached to the edge of said hole in a sealed manner to concrete when it is poured, in particular using systems threaded rod nuts 11.
  • Concrete is then poured into the formwork taking care that no portion of the concrete poured, does not penetrate inside the delimited hollow housing externally by the tube 3 extended by the trochot 9.
  • each hole 10 is closed with a cable gland cover 12 drilled so as to receive a classified and sealed manner the sheathed ends of different sections 4 set up.
  • the bushing of the stuffing box cover 12 by each sheathed end of strand 4 must be made so waterproof to the grout 13.
  • the fine grout 13 After setting or hardening, the fine grout 13 forms a solid mass in which are intimately embedded the strands 4 with the exception of their ends, which reinforces protection, metal cables 5, already due to the presence of the sheaths 6 which surround them, while making possible the relative longitudinal sliding subsequent of these cables in their sheaths, sliding involved in the subsequent power up said cables.
  • the second phase is for example carried out from the manner which will be described in more detail later in the part of the description of a complete embodiment of the present invention: in fact, as regards this second phase, the present invention does not differ of the prior art considered here.
  • the invention proposes a solution which makes it possible to delete these different elements and even further in in some cases, trochot 9 itself.
  • anchor by which one or more sheathed strands greased can be individually drowned, on the most of their length in hardened concrete constituting the essential of the work.
  • Such systems anchors are described in documents FR-A-2 638 771 and EP-A-0 129 976.
  • the hardened concrete in which the strand is embedded belongs to a stripped block after casting and the hardening of the concrete, and the end of the strand is stripped beyond an outer face of this block, where it projection and where it is anchored by means of a key sectional.
  • a support plate belonging to the block stripped is between said outer face of the block and the end of the sheath of the strand, which poses a serious sealing problem when pouring concrete, which can result in premature corrosion of the strand.
  • the present invention aims to simplify the prestressed concrete structures relative to a structure conventional such as that illustrated in FIG. 1, and therefore to make them more economical, without encounter too serious problems with sealing and corrosion.
  • the invention thus provides a work such as defined in claim 1.
  • the invention includes, apart from these arrangements main, certain other provisions which preferably used at the same time and which will be more explicitly question below.
  • Figure 3 of said drawings schematically illustrates the first phase of a construction process of prestressed structure according to the invention.
  • FIGS 4, 5, 6 and 7 show schematically the four stages making up the second phase of this process.
  • Figure 8 shows a variant of the figure 3.
  • This plate 16 can be fixed anyway desirable on the ring 15 and / or on the formwork 1, by example using systems 11 themselves or using legs, angled or not, fixed to the formwork using of said systems.
  • the lights 17 are suitable for receiving the ends of the strands 4 with a small visible play in j which is compatible with sealing of the bushings considered vis-à-vis the poured concrete.
  • each strand can be carried out similarly at its two ends or, more simply, it is carried out at one end only of the strand considered, its other end being simply anchored.

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  • 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)

Claims (3)

  1. Betonbauwerk, das mit Hilfe von mehreren geschmierten, beschichteten Litzen (4) vorgespannt wird, wobei diese über den größten Teil ihrer Längsausdehnung einzeln in dem gehärteten Beton (2), der die wesentliche Substanz des Bauwerks bildet, versenkt werden, wobei der gehärtete Beton, in dem die Litzen versenkt werden, Teil eines Blocks ist, der nach dem Schütten und Aushärten des genannten Betons (2) ausgeschalt wird, wobei die Enden der Litzen jenseits einer Außenseite (S) des genannten Blocks bloßgelegt sind und dort in quer leicht voneinander beabstandeten Stellungen herausragen und in den Befestigungskeilen einer Platte (19) verankert sind, dadurch gekennzeichnet, daß die Beschichtung (6) jeder Litze (4) bis zu der genannten Außenseite (S) des Blocks reicht und von dem genannten gehärteten Beton (2) umgeben ist, dergestalt daß der Beton sämtliche Außenflächen der Litzen, die im Inneren der zur Formung des genannten Blocks verwendeten Verschalung angeordnet wurden, anliegend umhüllt.
  2. Verfahren zur Herstellung eines vorgespannten Betonbauwerks nach Anspruch 1, bei dem die geschmierten, beschichteten Litzen (4), die dazu vorgesehen sind, dieses Bauwerk in parallelen oder im wesentlichen parallelen sowie leicht voneinander beabstandeten Stellungen vorzuspannen, direkt in der Verschalung (1) angeordnet werden, die dazu vorgesehen ist, den Beton (2) aufzunehmen, der das Bauwerk bildet, das eine Ende jeder der genannten Litzen durch eine Öffnung (10), die in der Verschalung ausgespart ist, sowie durch einen Stützring (15), der an der Innenseite der Verschalung an dem Rand dieser Öffnung angeordnet ist, gesteckt wird, das genannte Ende außerdem durch eine Lochplatte (16) zur Abstandshaltung und Ordnung der Litzenenden gesteckt wird, wobei der Durchlaß der Löcher (17) in der Platte (16) für die Litzen nur gegenüber dem Schüttbeton dicht ist, ferner der Beton dergestalt in die Verschalung geschüttet wird, daß dieser Beton sämtliche Außenflächen der Litzen, die im Inneren der Verschalung angeordnet sind, anliegend umhüllt, und nach dem Härten des genannten Betons die Verschalung und gegebenenfalls die Lochplatte (16) entfernt wird, wonach die einzelnen Litzen gespannt und ihre hervorstehenden Enden geschützt werden.
  3. Herstellungsverfahren nach Anspruch 2, dadurch gekennzeichnet, daß der Stützring die verbreiterte Basis eines konischen Rohrs (9) bildet, das die Gesamtanordnung der Litzen (4) umgibt und seinerseits mit Beton (2) gefüllt wird, wenn dieser in die Verschalung geschüttet wird.
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
FR9204636 1992-04-15
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.

Publications (2)

Publication Number Publication Date
EP0566463A1 EP0566463A1 (de) 1993-10-20
EP0566463B1 true 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 (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2308680A1 (de) 2009-09-28 2011-04-13 Hubertus Dettke Elektrostatische Druckhilfe
DE202014001408U1 (de) 2014-02-13 2014-02-25 Eltex Elektrostatik Gmbh Elektrostatische Druckhilfe für eine Rotationsdruckvorrichtung

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
RU2372458C2 (ru) * 2007-04-09 2009-11-10 Открытое акционерное общество "Опытное Конструкторское Бюро Машиностроения имени И.И. Африкантова" (ОАО "ОКБМ Африкантов") Арматурный пучок предварительно напряженного железобетонного сооружения
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

Family Cites Families (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
GB8314417D0 (en) * 1983-05-25 1983-06-29 Psc Freyssinet Ltd Tendons for concrete structures
FR2579236B1 (fr) * 1985-03-19 1987-07-17 Elf France Cable de precontrainte prefabrique et son procede de fabrication
AU587442B2 (en) * 1985-04-08 1989-08-17 Sumitomo Electric Industries, Ltd. Prestressing steel material
DE3838069C2 (de) * 1988-11-10 1995-12-14 Hochtief Ag Hoch Tiefbauten Transport- und einbetonierfähiges Spannbewehrungsaggregat für das Vorspannen von Stahlbetonbauwerken

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2308680A1 (de) 2009-09-28 2011-04-13 Hubertus Dettke Elektrostatische Druckhilfe
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

Also Published As

Publication number Publication date
EP0566463A1 (de) 1993-10-20
FR2690189B1 (fr) 1998-11-13
DE69318754D1 (de) 1998-07-02
DE69318754T2 (de) 1998-11-12
ATE166690T1 (de) 1998-06-15
FR2690189A1 (fr) 1993-10-22
ES2115736T3 (es) 1998-07-01

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