EP0414611B1 - Procédé et dispositif pour positionner un vérin de mise en tension d'un câble de précontrainte d'une structure - Google Patents

Procédé et dispositif pour positionner un vérin de mise en tension d'un câble de précontrainte d'une structure 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
Authority
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
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0414611A1 (fr
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
Original Assignee
Bouygues 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
Application filed by Bouygues SA filed Critical Bouygues SA
Publication of EP0414611A1 publication Critical patent/EP0414611A1/fr
Application granted granted Critical
Publication of EP0414611B1 publication Critical patent/EP0414611B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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.

Landscapes

  • 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)
EP90402337A 1989-08-25 1990-08-22 Procédé et dispositif pour positionner un vérin de mise en tension d'un câble de précontrainte d'une structure Expired - Lifetime EP0414611B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8911259A FR2651266B1 (fr) 1989-08-25 1989-08-25 Procede et dispositif pour positionner un verin de mise en tension d'un cable de precontrainte d'une structure.
FR8911259 1989-08-25

Publications (2)

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

Family

ID=9384922

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90402337A Expired - Lifetime EP0414611B1 (fr) 1989-08-25 1990-08-22 Procédé et dispositif pour positionner un vérin de mise en tension d'un câble de précontrainte d'une structure

Country Status (6)

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

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

Also Published As

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

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