EP0863277A1 - Procédé de réalisation d'un ouvrage de construction pré- ou post-contraint, et procédé de fabrication de torons employés dans un tel procédé de réalisation - Google Patents
Procédé de réalisation d'un ouvrage de construction pré- ou post-contraint, et procédé de fabrication de torons employés dans un tel procédé de réalisation Download PDFInfo
- Publication number
- EP0863277A1 EP0863277A1 EP98400427A EP98400427A EP0863277A1 EP 0863277 A1 EP0863277 A1 EP 0863277A1 EP 98400427 A EP98400427 A EP 98400427A EP 98400427 A EP98400427 A EP 98400427A EP 0863277 A1 EP0863277 A1 EP 0863277A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- strand
- wires
- sheath
- grout
- filling material
- 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
Links
Images
Classifications
-
- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B1/00—Constructional features of ropes or cables
- D07B1/16—Ropes or cables with an enveloping sheathing or inlays of rubber or plastics
- D07B1/165—Ropes or cables with an enveloping sheathing or inlays of rubber or plastics characterised by a plastic or rubber inlay
-
- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B1/00—Constructional features of ropes or cables
- D07B1/14—Ropes or cables with incorporated auxiliary elements, e.g. for marking, extending throughout the length of the rope or cable
- D07B1/141—Ropes or cables with incorporated auxiliary elements, e.g. for marking, extending throughout the length of the rope or cable comprising liquid, pasty or powder agents, e.g. lubricants or anti-corrosive oils or greases
- D07B1/144—Ropes or cables with incorporated auxiliary elements, e.g. for marking, extending throughout the length of the rope or cable comprising liquid, pasty or powder agents, e.g. lubricants or anti-corrosive oils or greases for cables or cable components built-up from metal wires
-
- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B7/00—Details of, or auxiliary devices incorporated in, rope- or cable-making machines; Auxiliary apparatus associated with such machines
- D07B7/02—Machine details; Auxiliary devices
- D07B7/14—Machine details; Auxiliary devices for coating or wrapping ropes, cables, or component strands thereof
- D07B7/145—Coating or filling-up interstices
-
- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B7/00—Details of, or auxiliary devices incorporated in, rope- or cable-making machines; Auxiliary apparatus associated with such machines
- D07B7/16—Auxiliary apparatus
- D07B7/18—Auxiliary apparatus for spreading or untwisting ropes or cables into constituent parts for treatment or splicing purposes
- D07B7/185—Auxiliary apparatus for spreading or untwisting ropes or cables into constituent parts for treatment or splicing purposes for temporarily untwisting ropes or cables into constituent parts for applying a coating
-
- 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
- E04C5/085—Tensile members made of fiber reinforced plastics
-
- 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
-
- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B2201/00—Ropes or cables
- D07B2201/20—Rope or cable components
- D07B2201/2015—Strands
- D07B2201/2023—Strands with core
-
- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B2201/00—Ropes or cables
- D07B2201/20—Rope or cable components
- D07B2201/2015—Strands
- D07B2201/2024—Strands twisted
-
- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B2201/00—Ropes or cables
- D07B2201/20—Rope or cable components
- D07B2201/2047—Cores
- D07B2201/2052—Cores characterised by their structure
- D07B2201/2065—Cores characterised by their structure comprising a coating
-
- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B2201/00—Ropes or cables
- D07B2201/20—Rope or cable components
- D07B2201/2071—Spacers
- D07B2201/2073—Spacers in circumferencial direction
-
- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B2201/00—Ropes or cables
- D07B2201/20—Rope or cable components
- D07B2201/2075—Fillers
-
- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B2205/00—Rope or cable materials
- D07B2205/30—Inorganic materials
- D07B2205/3003—Glass
-
- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B2205/00—Rope or cable materials
- D07B2205/30—Inorganic materials
- D07B2205/3007—Carbon
-
- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B2205/00—Rope or cable materials
- D07B2205/30—Inorganic materials
- D07B2205/3021—Metals
- D07B2205/3025—Steel
-
- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B2205/00—Rope or cable materials
- D07B2205/30—Inorganic materials
- D07B2205/3021—Metals
- D07B2205/3071—Zinc (Zn)
-
- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B2207/00—Rope or cable making machines
- D07B2207/40—Machine components
- D07B2207/404—Heat treating devices; Corresponding methods
-
- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B2501/00—Application field
- D07B2501/20—Application field related to ropes or cables
- D07B2501/2015—Construction industries
- D07B2501/2023—Concrete enforcements
Definitions
- the present invention relates to the field of strands used in construction works. She finds an important application in pre- or post-stress such works by means of strands stretched to inside injected sheaths.
- the invention relates more precisely to strands of which at least some of the constituent wires have a portion of their surface exposed to the strand environment, as opposed to sheathed strands which, from their manufacture, are individually contained in a protective sheath, most often with a protective material such as wax, fat or elastomer.
- a protective sheath most often with a protective material such as wax, fat or elastomer.
- unsheathed strands are often preferred due to their lower cost and the fact that their anchoring is less delicate. Indeed, it is not necessary, after placement of such a strand in its sheath, to strip the portions of this strand that will be stuck in the keys of the anchor and remove the material protective in these portions. This facilitates anchoring and makes it safer since we have the assurance that it does not subsist not, between the wires and the keys, a material which would harm the firmness of the anchor.
- US-A-5,263,307 describes a prestressing strand in which a synthetic resin paint coats the wires, inward and outward of the strand.
- the constituent wires of this strand are thus incorporated into a sort of matrix whose rigidity harms deformability of the strand.
- the handling of such a strand and its implementation place in a sheath (most often not straight) are therefore problematic.
- the coating resin must be completely removed from the periphery of the strand at level of the anchors, so that the internal teeth keys fit well on the steel of the wires and not on the synthetic resin which offers only a weak shear strength.
- Figure 1 shows a book comprising several portions 2, 2A, 2B, in which passed a prestressing sheath 1.
- the strands 3 are tensioned and anchored at both ends of the sheath 1 by means of anchoring devices 4, for example at keys, shown schematically in Figure 1.
- a grout 5 generally a cement grout, is injected inside the sheath 1 after the tensioning and anchoring of the strands 3.
- This grout 5 is for example injected by the ends of the sheath by means of appropriate conduits provided in the anchoring devices 4 or in their vicinity.
- the grout 5 is injected under pressure at one end, as symbolized by pump A, the other end being provided with a depressurized vent B or simply vented.
- Figure 2 shows a cross section of a unsheathed strand as commonly used in the art anterior.
- the strand usually consists of seven wires stranded together: a central wire, or core, 6 and six wires peripherals 7 twisted around the core 6. These wires 6, 7 are solid wires, most often metallic.
- the core 6 has a diameter slightly greater than that peripheral wires 7 (for example 5.2 mm instead of 5 mm in strands with a diameter of 15.2 mm). It thus exists small intervals e between the wires peripheral devices. Towards the outside of these intervals e, the surface of peripheral wires 7 is exposed to the environment of the strand. Inward intervals e, the strand has six internal gaps i between the core 6 and the peripheral wires 7, interstices whose section is in the shape of a curvilinear triangle.
- An object of the invention is to provide a solution simple and effective to the problem of observed pockets of water in the pre- or post-stress ducts, a solution which does not significantly penalize the convenience of placing in use and anchoring the strands.
- the invention thus provides a method of making of pre- or post-stressed construction works such as as set out in claim 1.
- the filling material which, preferably, fills the entire volume of internal gaps, prevents the infiltration of water between the strand wires and its path along the internal interstices.
- the phenomenon undesirable filtration of the grout, which separates part of its liquid phase of its solid components, is further eliminated.
- the invention relates to a process for manufacturing a torcn, as defined in claim 4.
- the strand 3 shown in Figure 3 differs from the one previously commented with reference to Figure 2 by the presence of a filling material in the internal gaps i defined between the constituent wires 6, 7 of the strand.
- this strand 3 can be installed as previously described in reference to figure 1. Elimination of the phenomenon undesirable filtration of the grout between the wires strand 7 devices will remove, or at least prevent almost completely, the problems linked to the formation of water pockets in the sheath 1.
- the filling material of the interstices i is chosen so as to be viscous enough not to flow or be driven out by the pressure of the grout. She must on the other hand be compatible with the nature of the wires 6, 7 so as not to cause corrosion.
- Examples of usable materials are waxes, in particular petroleum, silicone or polybutadiene pastes, or still any similar material having the characteristics adequate physical and chemical properties, including not oppose the good jamming of the core 6 during anchoring of the strand.
- the plastic characteristics of this material are selected so that the strand retains a good plasticity, allowing its winding as well as its threading in winding sheaths.
- the material of the wires 6, 7 will generally be steel as usual, although various materials are conceivable, for example carbon fibers or of glass.
- the number of threads is preferably, but not restrictively, from seven.
- the filling material provides active protection of the wire metal.
- a polarizing material leading to cathodic protection to fight even more effectively against corrosion.
- a resin for example epoxy, charged with metallic particles, in particular zinc, or still a soft metal.
- the manufacture of a strand such as that shown in Figure 2 or 3 essentially consists of winding helix the outer wires 7 around the core 6.
- strand 3 is made from steel wires requiring thermomechanical stabilization treatment performed at medium high temperature (around 400 ° C), it could happen that the filling material is altered if it is put in place prior to treatment.
- the deposition of the filling material 9 on the core of the strand is carried out during a loosening of the strand after the thermomechanical treatment. This operation of loosening spreads the peripheral wires 7, allowing so inject the filling material between these wires peripherals 7 by means of nozzles 10 suitably positioned (figure 4).
- the contribution of filling material can correspond exactly to the quantity required or may contain a slight excess subsequently eliminated.
- FIG. 5 shows schematically an installation can be used to make a strand in accordance with present invention.
- a conventional stranding unit 20 is supplied with the core 6 and the six peripheral wires 7 from respective reels 16, 17, and manipulates these wires to form the strand 3. This is, if necessary, subjected to a heat or thermomechanical treatment in a unit 30.
- the strand thus obtained is of structure classic. It can be immediately issued to the unit of loosening and tightening 40, as shown, or be stored as is for later introduction in this unit 40.
- the reference 50 symbolizes the means used to deposit filling material during that the strand is loose (bath, or nozzles 10 as shown in Figure 4).
- a cleaning unit 60 mechanical and / or chemical eventually removes excess filling material, before the strand 3 is finally wound by a 70 unit.
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Mechanical Engineering (AREA)
- Reinforcement Elements For Buildings (AREA)
- Cable Accessories (AREA)
- Ropes Or Cables (AREA)
Abstract
Description
- la figure 1 est un schéma en coupe d'un ouvrage précontraint pendant l'injection du coulis dans la gaine ;
- la figure 2 est une vue en coupe transversale d'un toron de précontrainte selon l'art antérieur ;
- la figure 3 est une vue en coupe transversale d'un toron selon la présente invention ;
- la figure 4 est un schéma illustrant un mode de fabrication possible d'un toron selon l'invention ; et
- la figure 5 est un schéma d'une installation utilisable pour fabriquer un toron selon l'invention.
Claims (5)
- Procédé de réalisation d'un ouvrage de construction pré- ou postcontraint dans lequel on dispose au moins un toron (3) dans une gaine de pré- ou postcontrainte (1), on met ce toron en tension, on l'ancre aux extrémités de la gaine au moyen de dispositifs d'ancrage (4), et on injecte un coulis durcissable (5) dans la gaine, caractérisé en ce que, pour lutter contre l'accumulation de liquide issu du coulis (5), en partie haute du tracé de la gaine (1), on utilise un toron (3) comprenant plusieurs fils pleins toronnés (6,7) entre lesquels il comporte des interstices internes (i), les fils (7) situés à la périphérie du toron ayant une portion de leur surface directement exposée à l'environnement du toron pour assurer l'ancrage du toron dans de bonnes conditions, une matière de remplissage étant présente dans lesdits interstices internes pour empêcher que le liquide issu du coulis puisse pénétrer dans les interstices internes du toron et cheminer le long du toron dans ses interstices internes.
- Procédé selon la revendication 1, dans lequel la matière de remplissage a les caractéristiques de plasticité d'une cire, d'une pâte de silicone ou polybutadiène ou d'un métal mou laissant au toron sa capacité de déformabilité.
- Procédé selon la revendication 1 ou 2, dans lequel les fils (6,7) sont métalliques et la matière de remplissage est choisie pour procurer une protection active de type cathodique du métal des fils.
- Procédé de fabrication d'un toron de pré- ou postcontrainte (3) comportant un fil central (6) et comportant des fils périphériques (7) dont la surface, dans leur partie extérieure au toron, est exposée à l'environnement du toron, caractérisé par les étapes suivantes :toronner les fils périphériques autour du fil central pour former le toron ;desserrer le toron ;déposer un matériau de remplissage (9) sur le fil central (6) du toron desserré, entre les fils périphériques (7) ;resserrer le toron de façon que le matériau de remplissage comble les interstices (i) en forme de triangle curviligne présents entre le fil central et les fils périphériques ;nettoyer le toron resserré, pour éliminer un excès de matériau de remplissage ayant débordé à l'extérieur du toron.
- Procédé selon la revendication 4, dans lequel les étapes de desserrage, de dépôt, de resserrage et de nettoyage sont effectuées après un traitement thermique ou thermomécanique du toron.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9702013A FR2759715B1 (fr) | 1997-02-20 | 1997-02-20 | Toron pour ouvrages de construction, procedes de fabrication et de mise en oeuvre de tels torons |
FR9702013 | 1997-02-20 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0863277A1 true EP0863277A1 (fr) | 1998-09-09 |
EP0863277B1 EP0863277B1 (fr) | 2003-04-09 |
Family
ID=9503969
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP98400427A Expired - Lifetime EP0863277B1 (fr) | 1997-02-20 | 1998-02-20 | Procédé de réalisation d'un ouvrage de construction pré- ou post-contraint, et procédé de fabrication de torons employés dans un tel procédé de réalisation |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0863277B1 (fr) |
ES (1) | ES2196508T3 (fr) |
FR (1) | FR2759715B1 (fr) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN114959982A (zh) * | 2022-05-24 | 2022-08-30 | 格兰茨斯托夫工业制品(青岛)有限公司 | 一种pet轮胎帘子线的制备方法及其生产系统 |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2188004A1 (fr) * | 1972-06-07 | 1974-01-18 | Stup Procedes Freyssinet | |
GB1599410A (en) * | 1978-05-25 | 1981-09-30 | Bridon Ltd | Corrosion prevention in steel wire strand and rope |
US5263307A (en) * | 1991-02-15 | 1993-11-23 | Hokkai Koki Co., Ltd. | Corrosion resistant PC steel stranded cable and process of and apparatus for producing the same |
DE4435744A1 (de) * | 1994-10-06 | 1996-04-11 | Dyckerhoff & Widmann Ag | Verfahren zum Reinigen und Freilegen längenmäßig begrenzter Abschnitte von Litzen aus Stahldrähten |
-
1997
- 1997-02-20 FR FR9702013A patent/FR2759715B1/fr not_active Expired - Fee Related
-
1998
- 1998-02-20 ES ES98400427T patent/ES2196508T3/es not_active Expired - Lifetime
- 1998-02-20 EP EP98400427A patent/EP0863277B1/fr not_active Expired - Lifetime
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2188004A1 (fr) * | 1972-06-07 | 1974-01-18 | Stup Procedes Freyssinet | |
GB1599410A (en) * | 1978-05-25 | 1981-09-30 | Bridon Ltd | Corrosion prevention in steel wire strand and rope |
US5263307A (en) * | 1991-02-15 | 1993-11-23 | Hokkai Koki Co., Ltd. | Corrosion resistant PC steel stranded cable and process of and apparatus for producing the same |
DE4435744A1 (de) * | 1994-10-06 | 1996-04-11 | Dyckerhoff & Widmann Ag | Verfahren zum Reinigen und Freilegen längenmäßig begrenzter Abschnitte von Litzen aus Stahldrähten |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN114959982A (zh) * | 2022-05-24 | 2022-08-30 | 格兰茨斯托夫工业制品(青岛)有限公司 | 一种pet轮胎帘子线的制备方法及其生产系统 |
CN114959982B (zh) * | 2022-05-24 | 2024-02-13 | 格兰茨斯托夫工业制品(青岛)有限公司 | 一种pet轮胎帘子线的制备方法及其生产系统 |
Also Published As
Publication number | Publication date |
---|---|
FR2759715B1 (fr) | 1999-04-23 |
ES2196508T3 (es) | 2003-12-16 |
FR2759715A1 (fr) | 1998-08-21 |
EP0863277B1 (fr) | 2003-04-09 |
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