EP0414611B1 - Method and arrangement for positioning jacks for prestressing cables in auctures - Google Patents

Method and arrangement for positioning jacks for prestressing cables in auctures Download PDF

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Publication number
EP0414611B1
EP0414611B1 EP90402337A EP90402337A EP0414611B1 EP 0414611 B1 EP0414611 B1 EP 0414611B1 EP 90402337 A EP90402337 A EP 90402337A EP 90402337 A EP90402337 A EP 90402337A EP 0414611 B1 EP0414611 B1 EP 0414611B1
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EP
European Patent Office
Prior art keywords
support
piece
jack
bracket
cable
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
EP90402337A
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German (de)
French (fr)
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EP0414611A1 (en
Inventor
Jean-Pierre Brisset
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.)
Bouygues SA
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Bouygues SA
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Filing date
Publication date
Application filed by Bouygues SA filed Critical Bouygues SA
Publication of EP0414611A1 publication Critical patent/EP0414611A1/en
Application granted granted Critical
Publication of EP0414611B1 publication Critical patent/EP0414611B1/en
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Expired - Lifetime legal-status Critical Current

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    • 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
    • E04G21/121—Construction of stressing jacks

Definitions

  • the invention relates to the positioning of a jack for tensioning a prestressing cable.
  • the positioning of a jack in the extension of a prestressing cable for the tensioning of this cable is generally carried out in a more or less approximate manner by moving the handling machine which carries the jack and it is long and difficult to '' ensure correct positioning due to the weight of the jack (200 to 1000 kg), difficulties of access and the orientation of the cable outlet which can be arbitrary in space.
  • the present invention aims to solve this positioning problem.
  • one uses, as part fixed to the structure, a part arranged around the cable to be stretched and, for example, one very advantageously uses the anchoring plate or other anchoring body which is normally provided, in a known manner. itself, to facilitate an injection of cement slurry in the cable passage and for the mounting of a cover on the end of the cable after tensioning of the cable.
  • the anchoring plate or other anchoring body which is normally provided, in a known manner. itself, to facilitate an injection of cement slurry in the cable passage and for the mounting of a cover on the end of the cable after tensioning of the cable.
  • the jack is slidably mounted on a support capable of being hung on the anchoring piece temporarily by a movement from top to bottom.
  • a support capable of being suspended from a handling device for example a support capable of being suspended from the hook of a bracket or of an operating arm.
  • the support has the form of a console which has a front part capable of being applied and fixed on the anchoring part fixed to the structure and a longitudinal rear part perpendicular to the front part and under which the jack is supported so that it can slide towards the front.
  • the device shown in the figures is intended for position a jack V to tension a prestressing cable P coming out of a concrete structure S to be prestressed (Fig. 1).
  • an anchor plate A is embedded in the concrete around the outlet of the cable P and has bolt holes for receiving a cover, and this anchor is used as a guide and as a primary support for position the cylinder.
  • the anchor A used in this example, is shown in Figure 2 in front view and in Figure 3 in side view.
  • This part, of arcuate shape, is fixed in the concrete of the structure around the outlet of the prestressing cable, in a manner known per se. It has holes 1 for receiving bolts for fixing a cover in a manner known per se.
  • two of these holes 1 ′, 1 ⁇ are used to bolt a sector 2 shown in FIG. 4 to the anchoring part.
  • This sector forms teeth 3, 4 at its ends which can be seen in section in FIG. 5. These teeth are intended to retain and fix a console C to which the tensioning jack is suspended.
  • This console C is shown as a whole in FIG. 1 and, in more detail, in the figures.
  • It comprises a front part and a rear part which, in this example, are substantially perpendicular.
  • the front part is a part 5 of arcuate shape capable of being disposed against the anchoring part A, around the cable outlet, and it has an upper edge shaped with a flange 6 (FIG. 7) able to be retained by the teeth 3, 4 of sector 2.
  • Figure 8 shows the front part of the console in place on the anchor.
  • the rear part of the console is mainly constituted by a rail 7 fixed to the front part by a suitable elbow 8 of any structure in itself.
  • This rail is for example an I-shaped profile, the top of which is provided with a ring 9 allowing the console to be hooked to the hook 10 of a gantry 11 of a crane or other handling machine (FIG. 1).
  • the lower branch of the rail constitutes a raceway for the rollers 12 of a carriage 13 to which the jack V for tensioning is fixed, and a jack 14 controls the movement of the carriage along the rail ( Figures 1, 8, 9 ).
  • the structure of the carriage is arbitrary. In the example shown, this carriage comprises a sheath 15 in which the tensioning cylinder V is mounted. Means may be provided for adjusting the position of the jack with respect to the carriage and / or the carriage with respect to the rail, so as to center the jack with respect to the cable to be stretched.
  • Figure 10 shows the tensioning cylinder in the service position on the cable.
  • the console equipped with said cylinder is suspended from a handling machine which allows the console to be approached from the anchoring part until the front part of the console is hooked, by a movement from above below, on the anchor. You can then move the jack on the console towards the cable to grab the cable and pull it. Reverse operations allow the cylinder to be removed.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Manufacturing Of Electrical Connectors (AREA)
  • Bridges Or Land Bridges (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Load-Engaging Elements For Cranes (AREA)
  • Ropes Or Cables (AREA)

Abstract

According to the invention, the arrangement comprises a primary support (A) fixed to the structure (5) and a secondary support (C) which can be manipulated by means of a machine, these two supports comprising means which interact for fastening the secondary support (C) onto the primary support (A), and the secondary support (C) comprises means for carrying the tensioning jack (V). According to the method of the invention, a part is fixed to the structure to be prestressed, facing the use position of the jack, and a support capable of carrying the jack in the suitable use position is added to this part. <IMAGE>

Description

L'invention concerne le positionnement d'un vérin pour la mise en tension d'un câble de précontrainte.The invention relates to the positioning of a jack for tensioning a prestressing cable.

Le positionnement d'un vérin dans le prolongement d'un câble de précontrainte pour la mise en tension de ce câble est généralement réalisé de façon plus ou moins approximative en déplaçant l'engin de manutention qui porte le vérin et il est long et difficile d'assurer un positionnement correct en raison du poids du vérin (200 à 1000 kg), des difficultés d'accès et de l'orientation de la sortie du câble qui peut être quelconque dans l'espace.The positioning of a jack in the extension of a prestressing cable for the tensioning of this cable is generally carried out in a more or less approximate manner by moving the handling machine which carries the jack and it is long and difficult to '' ensure correct positioning due to the weight of the jack (200 to 1000 kg), difficulties of access and the orientation of the cable outlet which can be arbitrary in space.

La présente invention vise à résoudre ce problème de positionnement.The present invention aims to solve this positioning problem.

Il est connu de fixer une pièce à la structure à précontraindre en sorte que cette pièce soit en vis-à-vis de la position de service du vérin et d'utiliser cette pièce pour porter le vérin (Publications US-A-3588045 et US-A-3333819).It is known to fix a part to the structure to be prestressed so that this part is opposite the operating position of the jack and to use this piece to carry the jack (Publications US-A-3588045 and US -A-3333819).

Dans ces solutions connues, le vérin est directement boulonné à ladite pièce, ce qui présente des difficultés et des inconvénients que la présente invention cherche à éviter.In these known solutions, the jack is directly bolted to said part, which presents difficulties and disadvantages which the present invention seeks to avoid.

On y parvient selon la présente invention en accrochant à ladite pièce un support manipulable au moyen d'un engin de manutention et en faisant coulisser le vérin sur ce support pour l'amener dans la position de service adéquate.This is achieved according to the present invention by attaching to said piece a support that can be manipulated by means of a handling device and by sliding the jack on this support to bring it into the appropriate service position.

De préférence, on utilise, comme pièce fixée à la structure, une pièce disposée autour du câble à tendre et, par exemple, on utilise très avantageusement la plaque d'ancrage ou autre corps d'ancrage qui est normalement prévu, de façon connue en soi, pour faciliter une injection de coulis de ciment dans le passage du câble et pour le montage d'un capot sur l'extrémité du câble après mise en tension du câble.Preferably, one uses, as part fixed to the structure, a part arranged around the cable to be stretched and, for example, one very advantageously uses the anchoring plate or other anchoring body which is normally provided, in a known manner. itself, to facilitate an injection of cement slurry in the cable passage and for the mounting of a cover on the end of the cable after tensioning of the cable.

De façon préférée, selon l'invention, le vérin est monté à coulisse sur un support apte à être accroché sur la pièce d'ancrage de façon provisoire par un mouvement de haut en bas.Preferably, according to the invention, the jack is slidably mounted on a support capable of being hung on the anchoring piece temporarily by a movement from top to bottom.

De préférence, on utilise un support apte à être suspendu à un engin de manutention, par exemple un support apte à être suspendu au crochet d'une potence ou d'un bras de manoeuvre.Preferably, use is made of a support capable of being suspended from a handling device, for example a support capable of being suspended from the hook of a bracket or of an operating arm.

Dans une réalisation avantageuse, le support a la forme d'une console qui présente une partie antérieure apte à être appliquée et fixée sur la pièce d'ancrage fixée à la structure et une partie postérieure longitudinale perpendiculaire à la partie antérieure et sous laquelle le vérin est supporté de façon à pouvoir coulisser en direction de la partie antérieure.In an advantageous embodiment, the support has the form of a console which has a front part capable of being applied and fixed on the anchoring part fixed to the structure and a longitudinal rear part perpendicular to the front part and under which the jack is supported so that it can slide towards the front.

On décrira ci-après une réalisation conforme à la présente invention et qui présente encore d'autres particularités faisant également partie de l'invention, en référence aux figures jointes sur lesquelles :

  • . la figure 1 est une vue schématique d'un dispositif conforme à l'invention ;
  • . la figure 2 est une vue de face d'une pièce d'ancrage servant au dispositif ;
  • . la figure 3 est une vue latérale d'une dent de la pièce d'ancrage ;
  • . la figure 4 est une vue de face d'un secteur à rapporter sur la pièce d'ancrage ;
  • . la figure 5 est une coupe d'une extrémité du secteur de la figure 4 ;
  • . la figure 6 est une vue frontale de la partie antérieure d'une console de support du vérin de mise en tension ;
  • . la figure 7 est une coupe du bord supérieur de la partie antérieure de la console ;
  • . la figure 8 est une vue longitudinale avec coupe partielle de la console en place sur la pièce d'ancrage ;
  • . la figure 9 est une coupe schématique par un plan vertical transversal de la partie postérieure de la console, et
  • . la figure 10 est une vue longitudinale avec coupe partielle de la console en place sur la pièce d'ancrage, le vérin de mise en tension étant en position de service.
An embodiment in accordance with the present invention will be described below, which also has other features also forming part of the invention, with reference to the attached figures in which:
  • . Figure 1 is a schematic view of a device according to the invention;
  • . Figure 2 is a front view of an anchor for the device;
  • . Figure 3 is a side view of a tooth of the anchor;
  • . Figure 4 is a front view of a sector to be attached to the anchor;
  • . Figure 5 is a section through one end of the sector of Figure 4;
  • . FIG. 6 is a front view of the front part of a support console for the tensioning jack;
  • . Figure 7 is a section of the upper edge of the front part of the console;
  • . Figure 8 is a longitudinal view with partial section of the console in place on the anchor;
  • . FIG. 9 is a diagrammatic section through a vertical transverse plane of the rear part of the console, and
  • . Figure 10 is a longitudinal view with partial section of the console in place on the anchor, the tensioning cylinder being in the service position.

Le dispositif représenté sur les figures est destiné à positionner un vérin V pour tendre un câble de précontrainte P sortant d'une structure S en béton à précontraindre (Fig. 1).The device shown in the figures is intended for position a jack V to tension a prestressing cable P coming out of a concrete structure S to be prestressed (Fig. 1).

De façon en soi connue, une plaque d'ancrage A est noyée dans le béton autour de la sortie du câble P et présente des trous de boulonnage pour recevoir un capot, et on utilise cette pièce d'ancrage comme guide et comme support primaire pour positionner le vérin.In known manner, an anchor plate A is embedded in the concrete around the outlet of the cable P and has bolt holes for receiving a cover, and this anchor is used as a guide and as a primary support for position the cylinder.

Pour ce faire, on utilise certains des trous de boulonnage pour fixer provisoirement sur la pièce d'ancrage une pièce de retenue apte au montage d'une console ou, en variante, on utilise une pièce d'ancrage venue de fabrication avec une pièce de retenue permanente.To do this, we use some of the bolt holes to temporarily fix on the anchoring piece a retaining piece suitable for mounting a console or, alternatively, we use an anchoring piece from manufacturing with a piece of permanent detention.

La pièce d'ancrage A, utilisée dans cet exemple, est représentée sur la figure 2 en vue de l'avant et sur la figure 3 en vue latérale. Cette pièce, de forme arquée, est fixée dans le béton de l'ouvrage autour de la sortie du câble de précontrainte, de façon connue en soi. Elle présente des trous 1 pour recevoir des boulons de fixation d'un capot de façon connue en soi.The anchor A, used in this example, is shown in Figure 2 in front view and in Figure 3 in side view. This part, of arcuate shape, is fixed in the concrete of the structure around the outlet of the prestressing cable, in a manner known per se. It has holes 1 for receiving bolts for fixing a cover in a manner known per se.

Selon l'invention, on utilise deux de ces trous 1′, 1˝ pour boulonner sur la pièce d'ancrage un secteur 2 représenté sur la figure 4. Ce secteur forme à ses extrémités des dents 3, 4 que l'on voit en coupe sur la figure 5. Ces dents sont destinées à retenir et fixer une console C à laquelle le vérin de mise en tension est suspendu.According to the invention, two of these holes 1 ′, 1˝ are used to bolt a sector 2 shown in FIG. 4 to the anchoring part. This sector forms teeth 3, 4 at its ends which can be seen in section in FIG. 5. These teeth are intended to retain and fix a console C to which the tensioning jack is suspended.

Cette console C est représentée dans son ensemble sur la figure 1 et, plus en détails, sur les figures.This console C is shown as a whole in FIG. 1 and, in more detail, in the figures.

Elle comprend une partie antérieure et une partie postérieure qui, dans cet exemple, sont sensiblement perpendiculaires.It comprises a front part and a rear part which, in this example, are substantially perpendicular.

La partie antérieure est une pièce 5 de forme arquée apte à être disposée contre la pièce d'ancrage A, autour de la sortie du câble, et elle présente un bord supérieur conformé avec un rebord 6 (figure 7) apte à être retenu par les dents 3, 4 du secteur 2.The front part is a part 5 of arcuate shape capable of being disposed against the anchoring part A, around the cable outlet, and it has an upper edge shaped with a flange 6 (FIG. 7) able to be retained by the teeth 3, 4 of sector 2.

La figure 8 montre la partie antérieure de la console en place sur la pièce d'ancrage.Figure 8 shows the front part of the console in place on the anchor.

La partie postérieure de la console est principalement constituée par un rail 7 fixé à la partie antérieure par un coude approprié 8 de structure en soi quelconque.The rear part of the console is mainly constituted by a rail 7 fixed to the front part by a suitable elbow 8 of any structure in itself.

Ce rail est par exemple un profilé en forme de I dont le sommet est muni d'un anneau 9 permettant d'accrocher la console au crochet 10 d'un portique 11 de grue ou autre engin de manutention (figure 1). La branche inférieure du rail constitue un chemin de roulement pour les galets 12 d'un chariot 13 auquel est fixé le vérin V de mise en tension, et un vérin 14 commande le déplacement du chariot le long du rail (figures 1, 8, 9). La structure du chariot est quelconque. Dans l'exemple représenté, ce chariot comporte un fourreau 15 dans lequel le vérin V de mise en tension est monté. Des moyens peuvent être prévus pour régler la position du vérin par rapport au chariot et/ou du chariot par rapport au rail, de façon à centrer le vérin par rapport au câble à tendre.This rail is for example an I-shaped profile, the top of which is provided with a ring 9 allowing the console to be hooked to the hook 10 of a gantry 11 of a crane or other handling machine (FIG. 1). The lower branch of the rail constitutes a raceway for the rollers 12 of a carriage 13 to which the jack V for tensioning is fixed, and a jack 14 controls the movement of the carriage along the rail (Figures 1, 8, 9 ). The structure of the carriage is arbitrary. In the example shown, this carriage comprises a sheath 15 in which the tensioning cylinder V is mounted. Means may be provided for adjusting the position of the jack with respect to the carriage and / or the carriage with respect to the rail, so as to center the jack with respect to the cable to be stretched.

La figure 10 montre le vérin de mise en tension en position de service sur le câble.Figure 10 shows the tensioning cylinder in the service position on the cable.

Pour positionner le vérin de mise en tension, on suspend la console équipée dudit vérin à un engin de manutention qui permet d'approcher la console de la pièce d'ancrage jusqu'à accrocher la partie antérieure de la console, par un mouvement de haut en bas, sur la pièce d'ancrage. On peut ensuite déplacer le vérin sur la console en direction du câble pour saisir le câble et le tirer. Des opérations inverses permettent de retirer le vérin.To position the tensioning cylinder, the console equipped with said cylinder is suspended from a handling machine which allows the console to be approached from the anchoring part until the front part of the console is hooked, by a movement from above below, on the anchor. You can then move the jack on the console towards the cable to grab the cable and pull it. Reverse operations allow the cylinder to be removed.

Claims (20)

  1. Method for positioning a jack (V) for tensioning a cable (P) for prestressing a structure (S), in which:
    - a piece (A) is fixed to the structure to be prestressed, opposite the operating position of the jack,
    - a support (C), which can be manipulated by means of a manipulating appliance (11), is hooked onto the said piece,
    - this support (C) is used to carry the jack (V), and
    - the jack (V) is caused to slide on the said support (C) in order to bring it into the appropriate operating position.
  2. Method according to Claim 1, characterised in that a piece (A) disposed around the cable (P) to be tensioned is used as the piece fixed to the structure.
  3. Method according to Claim 2, characterised in that the plate or other anchoring body normally provided for mounting a cap on the end of the cable (P) after tensioning of the cable is used as the piece (A) fixed to the structure.
  4. Method according to one of Claims 1 to 3, characterised in that a bracket (C) suitable for being hooked onto the said piece (A) by a downward movement is used as the support.
  5. Method according to Claim 4, characterised in that a bracket (C) suitable for being suspended from the handling appliance (11) is used.
  6. Device for implementing the method according to Claim 1, this device including a primary support (A) fixed to the structure (S), characterised in that it includes a secondary support (C) which can be manipulated by means of a handling appliance (11), these two supports having means (2-6) interacting for hooking the secondary support onto the primary support, and the secondary support having means for slidably carrying the tensioning jack (V).
  7. Device according to Claim 6, characterised in that the said primary support (A) is a piece anchored to the structure around the prestressing cable (P).
  8. Device according to Claim 6 or 7, characterised in that it includes teeth (3, 4) attached to the primary support or manufactured in one piece with it for holding the secondary support (C).
  9. Device according to Claim 8, characterised in that the said teeth (3, 4) are carried by a curved piece (2) bolted onto the primary support.
  10. Device according to one of Claims 6 to 9, characterised in that the said secondary support is a bracket (C).
  11. Device according to Claim 10, characterised in that the said bracket (c) comprises a front part (5) hooked onto the said primary support.
  12. Device according to Claim 11, characterised in that the said front part (5) is a piece with a curved shape disposed around the cable (P).
  13. Device according to Claim 8 or 9 and Claim 11 or 12, characterised in that the said front part (5) has a shoulder (6) suitable for being held by the said teeth.
  14. Device according to one of Claims 10 to 13, characterised in that the bracket (C) has a longitudinal rear part (7) along which a carriage (13), which carries the tensioning jack (V), is able to move.
  15. Device according to Claim 14, characterised in that the said rear part comprises a rail (7) which constitutes a track for the said carriage (13).
  16. Device according to Claim 14 or 15, characterised in that the said rear part (7) is substantially at right angles to the front part (5) of the bracket.
  17. Device according to one of Claims 14 to 16, characterised in that the said bracket also carries a jack (14) which controls the movement of the said carriage (13).
  18. Device according to one of Claims 10 to 17, characterised in that the said bracket has a suspension means (9) enabling it to be suspended from a handling appliance.
  19. Device according to Claim 18, characterised in that the said suspension means (9) is fixed to the said rear part of the bracket.
  20. Device according to Claim 19, characterised in that the said suspension means (9) is a ring.
EP90402337A 1989-08-25 1990-08-22 Method and arrangement for positioning jacks for prestressing cables in auctures Expired - Lifetime EP0414611B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8911259 1989-08-25
FR8911259A FR2651266B1 (en) 1989-08-25 1989-08-25 METHOD AND DEVICE FOR POSITIONING A TENSIONER OF A TENSIONING OF A PRESSURE CABLE OF A STRUCTURE.

Publications (2)

Publication Number Publication Date
EP0414611A1 EP0414611A1 (en) 1991-02-27
EP0414611B1 true EP0414611B1 (en) 1993-04-14

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ID=9384922

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90402337A Expired - Lifetime EP0414611B1 (en) 1989-08-25 1990-08-22 Method and arrangement for positioning jacks for prestressing cables in auctures

Country Status (6)

Country Link
EP (1) EP0414611B1 (en)
AT (1) ATE88234T1 (en)
DE (1) DE69001339T2 (en)
DK (1) DK0414611T3 (en)
ES (1) ES2040084T3 (en)
FR (1) FR2651266B1 (en)

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1123233A (en) * 1964-11-17 1968-08-14 Carves Simon Ltd Improvements in and relating to hydraulic jacks
US3588045A (en) * 1969-01-31 1971-06-28 Allan H Stubbs Prestressing apparatus

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Publication number Publication date
ATE88234T1 (en) 1993-04-15
DK0414611T3 (en) 1993-05-17
EP0414611A1 (en) 1991-02-27
FR2651266B1 (en) 1991-12-13
DE69001339D1 (en) 1993-05-19
FR2651266A1 (en) 1991-03-01
DE69001339T2 (en) 1993-07-29
ES2040084T3 (en) 1993-10-01

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