EP0220113B1 - Perfectionnements aux dispositifs de précontrainte du béton comportant des cables tendus sinueux et à leurs procédés de mise en oeuvre - Google Patents

Perfectionnements aux dispositifs de précontrainte du béton comportant des cables tendus sinueux et à leurs procédés de mise en oeuvre Download PDF

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Publication number
EP0220113B1
EP0220113B1 EP86402243A EP86402243A EP0220113B1 EP 0220113 B1 EP0220113 B1 EP 0220113B1 EP 86402243 A EP86402243 A EP 86402243A EP 86402243 A EP86402243 A EP 86402243A EP 0220113 B1 EP0220113 B1 EP 0220113B1
Authority
EP
European Patent Office
Prior art keywords
strands
sheath
tubes
cable
cement grout
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
Application number
EP86402243A
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German (de)
English (en)
French (fr)
Other versions
EP0220113A1 (fr
Inventor
Pierre Jartoux
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=9323706&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0220113(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Freyssinet International STUP SA filed Critical Freyssinet International STUP SA
Priority to AT86402243T priority Critical patent/ATE42786T1/de
Publication of EP0220113A1 publication Critical patent/EP0220113A1/fr
Application granted granted Critical
Publication of EP0220113B1 publication Critical patent/EP0220113B1/fr
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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
    • 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 devices for prestressing concrete structures using relatively long sinuous tensioned cables constituted by bundles of several metallic strands (wires or strands), bundles which are housed in single-sheaths embedded in the at least part of their length in the concrete structure, especially during its pouring.
  • each cable strand is itself contained in a plastic tube with preferably interposition of grease.
  • spacers generally constituted by ligatures or by molded parts hollowed out by as many housings as strands to be kept apart, are relatively expensive and difficult to set up.
  • each strand is housed in a plastic tube and the different strands are stretched while the tubes are held transversely apart from each other. others according to a provision organized using spacer organs.
  • a solidifiable cement mortar is injected into said sheath after the tubes fitted with their cable strands have been placed in it.
  • the sheath is constituted by a tubular metallic section curved according to a relatively short single arc of circle and resistant to axial compression so as to absorb the prestressing tension exerted by the strands between its two ends and it has been proposed, to relieve the metal constituting this tubular section during the application of said prestress, to solidify the cement mortar before the strands are put under tension.
  • the present invention does not relate to such short and pre-stressed connection sections, but to sinuous and relatively long complete cables for which the transverse arrangement of the various constituent strands does not remain “organized” throughout their extent, but is on the contrary irregular. and messy.
  • These strands, or more precisely the tubes which contain them, are in fact here introduced into the corresponding long and sinuous sheaths, continuous or discontinuous, in groups or in isolation, without special precautions relating to their mutual spacing, which has the effect of making vary or "disorganize" their mutual transverse arrangement along said sheaths, in particular by bringing all the strands closer to the centers of curvature of the cable in the bent portions of the latter, by crossing some of these strands in a transverse direction, etc.
  • the grout in question must be sufficiently smooth and fine for this purpose during its injection and it must be solidifiable only at the end of the injection thanks to a sufficiently delayed setting.
  • Such grouts have for example been described in the French patents No. 7,040,367 and No. 8,317,485 of the applicant.
  • the invention includes, apart from this main arrangement, certain other arrangements which are preferably used at the same time and which will be more explicitly discussed below.
  • the prestressing cable 1 considered here is composed of a plurality of metal strands 2 (twisted wires or strands) extending substantially parallel so as to form a bundle.
  • Each strand is housed in a plastic tube 3 with the interposition of grease or any other lubricating product, the lubricating properties of this product may be permanent or limited in time.
  • the cable in question is intended to subject the prestressing to a concrete structure 4 in which a sheath 5, for example made of polyethylene, is embedded, this sheath having been put in place, with its final shape, in the formwork of the structure before the pouring concrete.
  • a sheath 5 for example made of polyethylene
  • Said shape is sinuous in the sense that it comprises a succession of several curved and / or straight sections, and in particular a series of several sections in opposite directions.
  • the sheath considered can be continuous or discontinuous and then limited to concrete crossings, the sections of unsheathed cable being straight and outside the concrete.
  • a cement grout 6 is sufficiently smooth and fine to be injected into the sheath 5 to fill all of the voids between the tubes 3 inside the sheath 5, said grout being chosen so that its setting is sufficiently delayed for intervene only at the end of full filling.
  • the injection in question is provided according to arrow C (FIG. 2) through a lumen 7 passing through a suitable cover 8 tightly connected to the relevant end of the sheath 5.
  • the final setting of the grout has the effect of hardening it by freezing the disorder of the strands 2 - or more precisely the irregular evolution of their transverse distribution along their extent -, in the same state as they were at the end of their installation inside the sheath 5.
  • the tubes 3 are then lined all along their extent by the rigid mass of the solidified grout 6 and they are totally blocked by this mass by forming excellent reinforced guides for the sliding of the metal strands against their internal surfaces.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Reinforcement Elements For Buildings (AREA)
  • Ropes Or Cables (AREA)
  • Tents Or Canopies (AREA)
EP86402243A 1985-10-10 1986-10-09 Perfectionnements aux dispositifs de précontrainte du béton comportant des cables tendus sinueux et à leurs procédés de mise en oeuvre Expired EP0220113B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86402243T ATE42786T1 (de) 1985-10-10 1986-10-09 Vorspannvorrichtungen fuer beton mit sinuskurvenfoermigem spannkabel und verfahren zur anwendung.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8515030 1985-10-10
FR8515030A FR2588596B1 (fr) 1985-10-10 1985-10-10 Perfectionnements aux dispositifs de precontrainte du beton comportant des cables tendus sinueux et a leurs procedes de mise en oeuvre

Publications (2)

Publication Number Publication Date
EP0220113A1 EP0220113A1 (fr) 1987-04-29
EP0220113B1 true EP0220113B1 (fr) 1989-05-03

Family

ID=9323706

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86402243A Expired EP0220113B1 (fr) 1985-10-10 1986-10-09 Perfectionnements aux dispositifs de précontrainte du béton comportant des cables tendus sinueux et à leurs procédés de mise en oeuvre

Country Status (6)

Country Link
US (1) US4693044A (enrdf_load_stackoverflow)
EP (1) EP0220113B1 (enrdf_load_stackoverflow)
JP (1) JPS6290471A (enrdf_load_stackoverflow)
AT (1) ATE42786T1 (enrdf_load_stackoverflow)
DE (1) DE3663160D1 (enrdf_load_stackoverflow)
FR (1) FR2588596B1 (enrdf_load_stackoverflow)

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2610656B1 (fr) * 1987-02-11 1991-06-21 Citra Dispositif pour guider les cables de precontrainte d'un ouvrage de genie civil
DE3731221A1 (de) * 1987-09-17 1989-04-06 Hofbauer Erich Dr Ing Kunststoffgeschuetzter spannstahl im verbund mit einpressmoertel
DE3824394C2 (de) * 1988-07-19 1995-05-04 Dyckerhoff & Widmann Ag Verfahren zum Einbau eines Bündelspannglieds großer Länge für Spannbeton mit nachträglichem Verbund
US4837885A (en) * 1988-08-01 1989-06-13 T.Y. Lin International Prestressed stay cable for use in cable-stayed bridges
DE3838069C2 (de) * 1988-11-10 1995-12-14 Hochtief Ag Hoch Tiefbauten Transport- und einbetonierfähiges Spannbewehrungsaggregat für das Vorspannen von Stahlbetonbauwerken
DE3925368A1 (de) * 1989-08-01 1991-02-14 Holzmann Philipp Ag Verfahren und einrichtung zum einfaedeln von spannstaehlen fuer buendelspannglieder in einsinnig gekruemmte spannkanaele
US5540030A (en) * 1994-07-01 1996-07-30 Morrow; Jack A. Process for the grouting of unbonded post-tensioned cables
FR2794477B1 (fr) * 1999-06-02 2001-09-14 Freyssinet Int Stup Cable de structure d'ouvrage de construction, troncon de gaine d'un tel cable, et procede de pose
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
WO2011075779A1 (en) * 2009-12-23 2011-06-30 Geotech Pty Ltd An anchorage system
USD694260S1 (en) 2012-01-06 2013-11-26 Microsoft Corporation Display screen with a transitional graphical user interface
USD696282S1 (en) 2012-01-06 2013-12-24 Microsoft Corporation Display screen with a transitional graphical user interface
JP2022064034A (ja) * 2020-10-13 2022-04-25 東京製綱株式会社 緊張材の定着構造およびプレストレストコンクリート構造物の製作方法

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3060640A (en) * 1959-06-11 1962-10-30 Span Tendons Ltd Cables for prestressing concrete
FR2112802A5 (en) * 1970-11-10 1972-06-23 Stup Procedes Freyssinet Grout for use in prestressing cables - prepd by double mixing with a plastifier
US4069677A (en) * 1975-06-20 1978-01-24 Kabushiki Kaisha Nitto Tekuno Group Anchor and method for constructing same
FR2511721A1 (fr) * 1981-08-21 1983-02-25 Freyssinet Int Stup Dispositif de raccordement incurve entre deux portions rectilignes d'un cable tendu
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
FR2554438B1 (fr) * 1983-11-03 1992-02-14 Freyssinet Int Stup Perfectionnements aux coulis d'injection pour gaines de precontraite et a leurs procedes de preparation

Also Published As

Publication number Publication date
US4693044A (en) 1987-09-15
JPH0481030B2 (enrdf_load_stackoverflow) 1992-12-22
DE3663160D1 (en) 1989-06-08
EP0220113A1 (fr) 1987-04-29
FR2588596B1 (fr) 1987-12-24
ATE42786T1 (de) 1989-05-15
FR2588596A1 (fr) 1987-04-17
JPS6290471A (ja) 1987-04-24

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