EP0128098A2 - Verfahren und Einrichtungen zum Vorspannen von Betonbauwerken und von entsprechenden Bauwerken - Google Patents

Verfahren und Einrichtungen zum Vorspannen von Betonbauwerken und von entsprechenden Bauwerken Download PDF

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Publication number
EP0128098A2
EP0128098A2 EP84401128A EP84401128A EP0128098A2 EP 0128098 A2 EP0128098 A2 EP 0128098A2 EP 84401128 A EP84401128 A EP 84401128A EP 84401128 A EP84401128 A EP 84401128A EP 0128098 A2 EP0128098 A2 EP 0128098A2
Authority
EP
European Patent Office
Prior art keywords
concrete
sections
axially
reinforcement
sheath
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
EP84401128A
Other languages
English (en)
French (fr)
Other versions
EP0128098A3 (en
EP0128098B1 (de
Inventor
Pierre Jartoux
Christian Brondeau
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
Priority to AT84401128T priority Critical patent/ATE28345T1/de
Publication of EP0128098A2 publication Critical patent/EP0128098A2/de
Publication of EP0128098A3 publication Critical patent/EP0128098A3/fr
Application granted granted Critical
Publication of EP0128098B1 publication Critical patent/EP0128098B1/de
Expired 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
    • 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
    • E—FIXED CONSTRUCTIONS
    • E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
    • E01D2101/00—Material constitution of bridges
    • E01D2101/20—Concrete, stone or stone-like material
    • E01D2101/24—Concrete
    • E01D2101/26—Concrete reinforced
    • E01D2101/28—Concrete reinforced prestressed

Definitions

  • the invention relates to methods and devices for prestressing concrete structures using tensile reinforcement and contained, at least in part, in sheaths themselves embedded in these structures.
  • the object of the invention is, above all, to make such replacements possible.
  • the prestressed concrete structures according to the invention are essentially characterized in that the mean lines of the sections, of their prestressing reinforcements, which are housed in masses of concrete are all straight or in an arc of a circle and in that, at least throughout said sections, each of said reinforcements is housed, with its filling material, in a plastic tube suitable for sliding against the metal, the two ends of this tube preferably being connected to two sleeves flared plastic material respectively surrounding the two corresponding frame ends, sleeves dimensioned and arranged in such a way, relative to the anchoring members of the frame, that they can be released axially through these members.
  • the sections of metal sheath intended to receive the reinforcements and to be embedded in the concrete are put into formwork before the concrete is poured. being carried out in such a way that the mean line of each of these sections extends in a straight line or in an arc of a circle and that the consecutive ends of these various mean lines are aligned two by two, then each tube is threaded in plastic material, optionally lined with its reinforcement beforehand, successively in the different sheath sections which correspond to it, before or after pouring the concrete around these sheath sections.
  • each end section of sheath is interrupted, on the side of the reinforcement end corresponding, a little below this end and we put in formwork, before pouring the concrete, on the one hand the anchoring member intended to serve as a support for said end of reinforcement and on the other hand a tapered connection suitable for establishing at least temporarily the continuity between the interrupted end of the sheath and said anchoring member, after which the concrete is poured, then the connection is released axially, if it is removable: in all cases, therefore, inside the mass of poured concrete, between the interrupted sheath end and the anchoring member, a frustoconical housing suitable for receiving one of the flared sleeves above is reserved .
  • this reinforcement is cut in at least one of its exposed areas outside the concrete so as to be able to extract all of the axially reinforcement sections thus cut which remain housed in the concrete, then these different axial extractions are carried out, the end sections being extracted with their ends flared at the head.
  • 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.
  • honeycombed that is to say composed of masses or blocks 1, 2, 3 of concrete resting on one against the others by means of webs or bracing slabs 4.5, which reserves between the blocks of the cells 6.
  • the structure in question is a bridge span constructed in any desirable manner, for example poured on site or in progress, or even prefabricated by elements.
  • reinforcements 7 are made up of multiple wires or strands 8 (FIG. 3) and stretched between their ends A and B at the level of anchoring members each bearing on one of blocks 1, 2, 3.
  • Each armature comprises an alternating succession of first sections crossing 1,2,3 blocks from iron sleeving - c themselves embedded in these blocks, and second outer rectilinear sections to concrete, extending between said blocks.
  • the mean lines of the first reinforcement sections had variable curvatures along these sections, - which made it impossible to move the axial displacements of these sections after mounting - said mean lines, according to a first characteristic of the invention, all extend according to an arc of a circle or according to a straight line segment and the same is true for metal sheaths, the formwork of which, before pouring concrete, must be specially provided accordingly.
  • metal sheaths 9 must be smooth, as illustrated in FIGS. 3 and 4.
  • Each end 7 1 of armature 7 takes, when it is under tension, a flared shape in a truncated cone.
  • the volumes inside the metal sheaths which are not occupied by the reinforcements were filled with a grout of injected cement.
  • each armature is housed end to end in a tube 10 made of a plastic material capable of sliding along the metal sheaths 9, the ends of this tube ending by open sleeves 11 (fig.3) at the flared ends of the frame.
  • These sleeves 11 are dimensioned and mounted so that they can be released axially through the corresponding anchoring members 12.
  • the plastic material constituting the tubes 10 and sleeves 11 is advantageously polyethylene but could be any other sufficiently economical plastic material, not adhering to metal and concrete and capable of forming continuous and waterproof envelopes.
  • sections of metal sheath 9 are placed in the formwork intended to receive the concrete, sections the mean lines of which extend in straight lines or in arcs of a circle.
  • ends D (fig. 3 and 4) of said sheath sections 9 are interrupted, corresponding to the reinforcing ends, a little below the corresponding orifices of the concrete blocks to be manufactured.
  • the corresponding anchoring members 12 are put in place, which are constituted in particular by cast iron or steel plates hollowed out from a central orifice 13.
  • this orifice 13 is determined as a function of the flared end of the armature 7 1 to be received, the end notably comprising a plurality of frustoconical split jaws 14 (fig. 3) each enclosing a end of wire or strand 8 and each received in a complementary housing of an anchoring head 15, the periphery of which bears on the member 12.
  • a frustoconical housing between the orifice 13 and the interrupted end D of the sheath 9 located near this orifice these two annular seats 13 and D can be brought together using d 'a frustoconical connection in sheet metal shown in Figure 3 by the broken lines 27, the various linear assemblies being executed in a sealed manner to the poured concrete, in particular by continuous welding or by spot welding and overlap to using a flexible adhesive or retractable waterproof strip.
  • a plug 16 with frustoconical outer surface is temporarily installed between the two annular seats 13 and D.
  • At least the peripheral zone of this plug is advantageously made of a radially inflatable material.
  • the plug 16 comprises for this purpose a rigid central tubular mandrel 17 surrounded contiguously by a sheath 18 of rubber or other elastomeric material with frustoconical external surface, this sleeve 18 extending axially on either side of the mandrel 17.
  • a central tie 19 extending along the axis of the mandrel 17 passes through two transverse plates 20 and 21 bearing axially on the two ends of the sleeve 18 so such that the simple screwing and unscrewing of a nut 22 on the outer end of this tie rod 19 makes it possible to inflate and deflate said sleeve 18 radially.
  • the outer plate 21 advantageously bears against the anchoring member 12.
  • the plug 16 is then released - after having deflated radially by unscrewing in the above hypothesis.
  • Said tube 10 is then put in place, which is composed of two successive strands each extending over substantially half of the total length and each terminated by a sleeve 11, fitted and glued or welded on its end E.
  • each of said strands is introduced into a discontinuous series of conduits formed by the sheath sections 9 embedded in the concrete, with the sleeve 11 corresponding to the rear, the two suites considered being arranged in the extension one on the other and covering all the sections in question.
  • the front ends of the two strands are connected to each other by means of a housing 24 (FIG. 1) and the two frustoconical sleeves are housed in the flared mouths of the terminal conduits. , without any mutual adhesion between these sleeves and the facing faces of these mouths.
  • wires or strands 8 making up the frame are then threaded into the tube 10.
  • the anchor heads 15 are then capped using suitable covers 25 fixed to the anchor members 12 in any desirable manner, in particular by bolting, and a cement grout is injected into the volumes inside the tubes 10 , to the ends 11 and to the covers 25, in particular from the housing 24, suitable vents then being provided in the covers 25.
  • the reinforcement is thus tensioned, protected, and exerts the desired prestress on the concrete structure.
  • the invention is in no way limited to those of its modes of application and embodiments which have been more especially envisaged; on the contrary, it embraces all variants, in particular those where the volume, inside the tube 10, which is not occupied by the reinforcements, would not be filled with a grout, but by another material such as a rubber or elastomer plug hollowed out from multiple channels for the reception of the various wires or strands, this formula being especially advantageous in the case where the tube 10 in question is provided only along the sections, of the reinforcement, housed at inside the concrete masses.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing Of Tubular Articles Or Embedded Moulded Articles (AREA)
  • Reinforcement Elements For Buildings (AREA)
  • Rod-Shaped Construction Members (AREA)
  • Bridges Or Land Bridges (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
  • Sampling And Sample Adjustment (AREA)
EP84401128A 1983-06-03 1984-06-04 Verfahren und Einrichtungen zum Vorspannen von Betonbauwerken und von entsprechenden Bauwerken Expired EP0128098B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84401128T ATE28345T1 (de) 1983-06-03 1984-06-04 Verfahren und einrichtungen zum vorspannen von betonbauwerken und von entsprechenden bauwerken.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8309278 1983-06-03
FR8309278A FR2546946B1 (fr) 1983-06-03 1983-06-03 Perfectionnements aux procedes et dispositifs de mise en precontrainte des ouvrages en beton et aux ouvrages correspondants

Publications (3)

Publication Number Publication Date
EP0128098A2 true EP0128098A2 (de) 1984-12-12
EP0128098A3 EP0128098A3 (en) 1985-06-26
EP0128098B1 EP0128098B1 (de) 1987-07-15

Family

ID=9289474

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84401128A Expired EP0128098B1 (de) 1983-06-03 1984-06-04 Verfahren und Einrichtungen zum Vorspannen von Betonbauwerken und von entsprechenden Bauwerken

Country Status (5)

Country Link
US (1) US4586303A (de)
EP (1) EP0128098B1 (de)
AT (1) ATE28345T1 (de)
DE (1) DE3464777D1 (de)
FR (1) FR2546946B1 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0606820A1 (de) * 1993-01-11 1994-07-20 VSL International AG Spannverankerung für mindestens ein innerhalb eines Hüllrohres verlaufendes Zugelement und Verfahren zum Herstellen der Spannverankerung
WO2000014357A3 (de) * 1998-09-09 2000-05-25 Bilfinger Berger Bau Vorrichtung zur externen vorspannung von bauwerken
WO2013150329A1 (en) * 2012-04-05 2013-10-10 Soletanche Freyssinet Seal for cable anchor device of a cable construction

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3734954A1 (de) * 1987-03-13 1988-04-07 Dyckerhoff & Widmann Ag Korrosionsgeschuetztes zugglied, vornehmlich spannglied fuer spannbeton ohne verbund und verfahren zu seinem einbau
AT396153B (de) * 1989-09-08 1993-06-25 Vorspann Technik Gmbh Spannglied
DE4118897A1 (de) * 1991-06-08 1992-12-10 Hochtief Ag Hoch Tiefbauten Bauwerkslagereinrichtung fuer ein spannglied und verfahren zum auswechseln eines solchen spanngliedes
CA2134644C (en) * 1993-04-01 1998-06-16 Min Se Koo Method to construct the prestressed composite beam structure and the prestressed composite beam for a continuous beam thereof
IT1266784B1 (it) * 1993-11-09 1997-01-21 Dlc Srl Solaio industriale prefabbricato
US5758855A (en) * 1995-11-21 1998-06-02 Cadillac Products, Inc. Pallet with flexible tensile reinforcement and method for making the same
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
KR100754789B1 (ko) 2006-06-30 2007-09-03 박재만 단위 프리스트레스트 합성 거더와 이를 이용한 연속보시공방법
US7765752B2 (en) * 2008-02-20 2010-08-03 Hayes Specialty Machining, Ltd. Anchor system with substantially longitudinally equal wedge compression
ES2402971B1 (es) * 2011-08-04 2014-08-07 Tecnicas Del Pretensado Y Servicios Auxiliares, S.L. Silla multitubo para puentes atirantados y extradorsados y procedimiento para su fabricación.
CN104169182A (zh) * 2012-02-20 2014-11-26 罗尼派尔以色列2000有限公司 托板和梁
ES2930117T3 (es) * 2019-11-07 2022-12-07 Wimao Oy Palé

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2277953A1 (fr) * 1974-07-09 1976-02-06 Stup Procedes Freyssinet Tirants libres formes d'armatures d'acier tendues
FR2488642A1 (fr) * 1980-08-16 1982-02-19 Dyckerhoff & Widmann Ag Element de coffrage recuperable pour la zone d'ancrage d'un organe tendeur dans un element de construction en beton
FR2516574A1 (fr) * 1981-11-17 1983-05-20 Freyssinet Int Stup Dispositif d'appui de la tete d'ancrage d'une armature multibrin contre une structure precontrainte

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA642128A (en) * 1962-06-05 H. Minshall Harry Deck construction
GB541437A (en) * 1940-08-13 1941-11-26 Alfred Tony Jules Gueritte Improvements in or relating to the construction of prestressed concrete
CH444441A (de) * 1965-09-16 1967-09-30 Losinger Ag Einrichtung zum Spannen und Verankern von mehreren, zusammen ein Spannkabel bildenden Spanngliedern
US3843288A (en) * 1969-04-16 1974-10-22 Conenco Int Ltd Tendon anchorage with threaded support element
US3937607A (en) * 1972-07-03 1976-02-10 Reliable Electric Company Post-tensioning anchors assembled in combination with a spacer strip
DE3138819C2 (de) * 1981-09-30 1986-10-23 Dyckerhoff & Widmann AG, 8000 München Verfahren zur Montage eines zwischen seinen Verankerungsstellen frei gespannt verlaufenden Zuggliedes, insbesondere eines Schrägkabels für eine Schrägkabelbrücke

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2277953A1 (fr) * 1974-07-09 1976-02-06 Stup Procedes Freyssinet Tirants libres formes d'armatures d'acier tendues
FR2488642A1 (fr) * 1980-08-16 1982-02-19 Dyckerhoff & Widmann Ag Element de coffrage recuperable pour la zone d'ancrage d'un organe tendeur dans un element de construction en beton
FR2516574A1 (fr) * 1981-11-17 1983-05-20 Freyssinet Int Stup Dispositif d'appui de la tete d'ancrage d'une armature multibrin contre une structure precontrainte

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
BETON- UND STAHLBETONBAU, vol. 78, no. 6, juin 1983, pages 162-164, Verlag Wilhelm Ernst & Sohn, Berlin, DE; M. HOLZAPFEL et al.: "Entstehung und Beseitigung von Risssch{den an einer Spannbetonbr}cke" *
CIVIL ENGINEERING AND PUBLIC WORKS REVIEW, vol. 66, no. 783, octobre 1971, pages 1104-1105, Morgan-Crampion Ltd., Londres, GB; W.W. YOUNG et al.: "New technique for unbonded tendons" *
INTERNATIONAL CONSTRUCTION, vol. 11, no. 5, mai 1972, pages 33-43, Business Press International Ltd., Surrey, GB; C.H.S. TUPHOLME: "New concrete bridges with special features" *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0606820A1 (de) * 1993-01-11 1994-07-20 VSL International AG Spannverankerung für mindestens ein innerhalb eines Hüllrohres verlaufendes Zugelement und Verfahren zum Herstellen der Spannverankerung
WO2000014357A3 (de) * 1998-09-09 2000-05-25 Bilfinger Berger Bau Vorrichtung zur externen vorspannung von bauwerken
WO2013150329A1 (en) * 2012-04-05 2013-10-10 Soletanche Freyssinet Seal for cable anchor device of a cable construction
US9284700B2 (en) 2012-04-05 2016-03-15 Soletanche Freyssinet Seal for cable anchor device of a cable construction
RU2602853C2 (ru) * 2012-04-05 2016-11-20 Солетанш Фрейсине Уплотнение тросового анкерного устройства в тросовой конструкции

Also Published As

Publication number Publication date
FR2546946B1 (fr) 1986-04-18
ATE28345T1 (de) 1987-08-15
DE3464777D1 (en) 1987-08-20
FR2546946A1 (fr) 1984-12-07
US4586303A (en) 1986-05-06
EP0128098A3 (en) 1985-06-26
EP0128098B1 (de) 1987-07-15

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