EP0122860B1 - Verfahren und Vorrichtungen zum Einfetten von Spanngliedenden - Google Patents

Verfahren und Vorrichtungen zum Einfetten von Spanngliedenden Download PDF

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Publication number
EP0122860B1
EP0122860B1 EP84400763A EP84400763A EP0122860B1 EP 0122860 B1 EP0122860 B1 EP 0122860B1 EP 84400763 A EP84400763 A EP 84400763A EP 84400763 A EP84400763 A EP 84400763A EP 0122860 B1 EP0122860 B1 EP 0122860B1
Authority
EP
European Patent Office
Prior art keywords
cap
grease
housing
orifice
groove
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
EP84400763A
Other languages
English (en)
French (fr)
Other versions
EP0122860A3 (en
EP0122860A2 (de
Inventor
Christian Tourneur
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
Application filed by Freyssinet International STUP SA filed Critical Freyssinet International STUP SA
Priority to AT84400763T priority Critical patent/ATE31772T1/de
Publication of EP0122860A2 publication Critical patent/EP0122860A2/de
Publication of EP0122860A3 publication Critical patent/EP0122860A3/fr
Application granted granted Critical
Publication of EP0122860B1 publication Critical patent/EP0122860B1/de
Expired 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
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49826—Assembling or joining
    • Y10T29/49863—Assembling or joining with prestressing of part
    • Y10T29/49874—Prestressing rod, filament or strand

Definitions

  • the invention relates to a device for making possible the lubrication of the ends of certain reinforcements intended, by their tensioning, to ensure the prestressing of concrete elements, said reinforcements being contained in sheaths filled with grease and these sheaths being interrupted a little below the ends of the frames they contain, as well as the method for greasing using said device.
  • the end of the larger diameter of said housing namely that which opens on the side, of the plate, opposite the concrete element, constitutes the center of a bowl itself closed in a grease-tight manner by a cover then that the other end of the housing is connected in a relatively grease-tight manner to the corresponding sheath end, in particular by means of a plastic funnel.
  • the object of the invention is, above all, to remedy these drawbacks by ensuring, in a very simple manner, complete filling with grease without it being necessary to give the injection pressure a high value.
  • a rectilinear groove whose mean line is parallel to a generatrix of the truncated cone delimiting this housing and on the other share, in the cover, an orifice capable of being aligned in the extension of the groove during the mounting of this cover on the bowl.
  • 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.
  • Fig. 1 shows in axial section the end of a sheathed and greased prestressing cable as well as its anchoring device and that the lubrication means of this device established according to the invention.
  • Fig. 2 is a cross section of FIG. 1 according to 11-11.
  • the reinforcement in question intended to subject a concrete element or structure 1 to prestressing by being tensioned between its two ends, is preferably constituted by a strand 2 itself composed of wires wound around a central wire of slightly larger diameter.
  • this strand is itself even enveloped by a sheath 3 of plastic, for example polyethylene, and the volumes between this sheath and the constituent wires of the strand are filled with grease.
  • plastic for example polyethylene
  • Such a cladding and such a lubrication have the double advantage of making possible the relative sliding of the frame relative to the sheath, after pouring the concrete around the latter, which facilitates the tensioning of said frame, and of protecting this reinforcement against corrosion, in particular against humidity.
  • an anchoring device which comprises a metal plate 4, in particular of cast iron, thickened in its center and pierced in this center by a frustoconical housing 5.
  • This housing 5 is suitable for receiving the reinforcing end in question contiguously surrounded by a set of three jaws 6 forming a ring split longitudinally according to three slots 7: each of these jaws extends substantially over 120 ° around the 'axis common to the strand 2 and the housing 5 and has a cylindrical inner face adapted to match the strand and a frustoconical outer face complementary to the housing and bearing against the latter.
  • the edge of the mouth of small diameter of the frustoconical housing 5, or more precisely that of a cylindrical flange 8 extending this mouth axially, is connected in a relatively tight manner to the end of the sheath 3 - which sheath is interrupted below of the end of the frame 2 to allow the grips of the jaws 8 on this frame - by a suitable funnel 9 made of plastic material, a cylindrical end of which is force fitted onto said flange.
  • the edge of the other mouth of the housing 5, namely that of larger diameter, has the shape of a bowl of revolution 10 closed in leaktight manner by a cover 11.
  • the cross sections of the two housings 12 and 13 are such that they can both pass, preferably with clearance, to a straight rectilinear needle 14 intended to fill the device with grease, as will be explained below.
  • the outside diameter of this needle is generally between 1.5 and 3 mm so that the width of each of the housings 12 and 13 is advantageously between 2 and 5 mm.
  • the profile of the groove 12 preferably has the shape of a U.
  • one of the slots 7 separating two contiguous jaws can be located opposite the groove 12 just as the latter can be re-. covered over its entire width by the same jaw: in the latter case, if we consider that the angular width of the groove 12, seen from the axis of the device, is of the order of 10 °, this width does not represent that about one tenth of that of the portion, of the internal frustoconical face of the housing 5, against which the jaw in question bears.
  • the bowl 10 and the cover 11 are preferably constructed in such a way that the mounting of the second on the first ends automatically by placing the orifice 13 in alignment with the groove 12.
  • said elements are constituted in the manner explained in the French patent above.
  • the two elements in question are arranged in such a way that their mutual assembly is ensured by a bayonet movement, guided by cooperation of lugs 15, 16 provided on the cover with interrupted circular ribs 17 provided on the cup, the end of the angular stroke which constitutes the second and last phase of the bayonet movement being determined by angular stop of the lug 16 against one of the ribs 17.
  • the needle 14 After mounting the cover on the bowl, the needle 14 is pushed in fully through the orifice 13 and the groove 12: the end 18 of this needle then opens in the immediate vicinity of the end of the sheath 3, inside the funnel 9.
  • the evacuation of this air from the cover 11 is preferably carried out through a second orifice 20 hollowed out in the bottom of this cover and then open, but could also be through the orifice 13 itself, the cross section of which is then provided greater than that of the needle 14.
  • Such a closure can be obtained in any desirable manner by means of plugs independent or not of the cover 11.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Reinforcement Elements For Buildings (AREA)
  • Lubricants (AREA)
  • Knitting Machines (AREA)
  • Ropes Or Cables (AREA)

Claims (7)

1. Vorrichtung, die das Fetten des Endbereichs einer Armierung zum Vorspannen eines Betonelements (1) ermöglicht, welche Armierung sich in einem mit Fett gefüllten Mantel (3) befindet, der in einem kurzen Abschnitt diesseits des genannten Endbereichs unterbrochen ist, wobei dieser Endbereich mittels eines unterbrochenen kegelstumpfförmigen Kranzes von Spannbacken (6) in einem zu diesem Kranz komplementären kegelstumpfförmigen Sitz (5) verankert ist, der in einer starren Platte (4) ausgebildet ist, die sich gegen das vorzuspannende Betonelement abstützt, wobei der durchmessergrössere Endbereich des Sitzes, d.h. derjenige Endbereich, der auf der dem Betonelement entgegengesetzten Seite der Platte mündet, das Zentrum einer Schale (10) bildet, die ihrerseits durch eine Haube (11) fettdicht verschlossen ist, während das andere Ende des Sitzes relativ fettdicht mit dem entsprechenden Ende des Mantels verbunden ist, dadurch gekennzeichnet, dass einerseits in der kegelstumpfförmigen Innenseite des Sitzes (5) der Spannbacken (6) eine geradlinige Nut (12) ausgebildet ist, deren Mittellinie parallel zu einer Mantellinie des den Sitz begrenzenden Kegelstumpfs verläuft, und andererseits in der Haube (11) eine Öffnung (13) vorgesehen ist, die sich der Montage der Haube auf der Schale fluchtend zu der Verlängerung der Nut ausrichten lässt.
2. Vorrichtung zum Fetten nach Anspruch 1, dadurch gekennzeichnet, dass an der Haube (11) und an der Schale (10) zueinander komplementäre Mittel vorgesehen sind, die ein automatisches Plazieren der Öffnung (13) der Haube in der Verlängerung der Nut (12) bei Beendigung der Montage der Haube auf der Schale ermöglichen.
3. Vorrichtung zum Fetten nach Anspruch 2, dadurch gekennzeichnet, dass die Haube (11) und die Schale (10) derart ausgebildet sind, dass erstere sich mittels einer Bajonettverbindung an der letzteren montieren lässt, und dass die komplementären Mittel an der Haube und an der Schale zwei komplementäre tragende Flächen (16, 17) umfassen, die an dem die Montage der Bajonettverbindung abschliessenden Ende der Drehbewegung der Haube aneinander zum Anschlag kommen.
4. Vorrichtung zum Fetten nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die Haube (11) aus Plastikwerkstoff besteht.
5. Vorrichtung zum Fetten nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass die ummantelte und gefettete Armierung (2) von einer Einzellitze gebildet ist.
6. Verfahren zum Fetten des Endbereichs einer ummantelten und gefetteten Armierung mit Hilfe einer Vorrichtung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, dass eine geradlinige Hohlnadel (14) aufeinanderfolgend vollständig in die Öffnung (13) der Haube und in die Nut (12) derart eingeführt wird, dass das Ende (18) der Hohlnadel in unmittelbarer Nähe des Endes des Mantels (3) mündet, dass sodann durch die Hohlnadel Fett eingespritzt wird, bis dieses aus der Haube (11) zurückfliesst und dass anschliessend die Hohlnadel herausgezogen wird, wobei das Einspritzen von Fett fortgesetzt wird, bis das Herausziehen der Hohlnadel beendet ist.
7. Vorrichtung zum Fetten nach einem der Ansprüche 1 bis 5 zur Durchführung des Verfahrens nach Anspruch 6, dadurch gekennzeichnet, dass sie eine geradlinige Hohlnadel (14) umfasst, die nacheinander die in der Haube angebrachte Öffnung (3) und die mit dieser Öffnung fluchtende Nut (12) durchdringt, und dass an einem Ende dieser Hohlnadel ein Fettnippel (19) bleibend montiert ist.
EP84400763A 1983-04-19 1984-04-17 Verfahren und Vorrichtungen zum Einfetten von Spanngliedenden Expired EP0122860B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84400763T ATE31772T1 (de) 1983-04-19 1984-04-17 Verfahren und vorrichtungen zum einfetten von spanngliedenden.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8306374A FR2544768B1 (fr) 1983-04-19 1983-04-19 Perfectionnements aux procedes et dispositifs pour graisser les extremites d'armatures de precontrainte
FR8306374 1983-04-19

Publications (3)

Publication Number Publication Date
EP0122860A2 EP0122860A2 (de) 1984-10-24
EP0122860A3 EP0122860A3 (en) 1985-06-19
EP0122860B1 true EP0122860B1 (de) 1988-01-07

Family

ID=9287994

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84400763A Expired EP0122860B1 (de) 1983-04-19 1984-04-17 Verfahren und Vorrichtungen zum Einfetten von Spanngliedenden

Country Status (5)

Country Link
US (1) US4561226A (de)
EP (1) EP0122860B1 (de)
AT (1) ATE31772T1 (de)
DE (1) DE3468469D1 (de)
FR (1) FR2544768B1 (de)

Families Citing this family (27)

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Publication number Priority date Publication date Assignee Title
DE8437161U1 (de) * 1984-12-19 1985-03-21 Dyckerhoff & Widmann AG, 8000 München Ringfoermiges bewehrungselement fuer beton
US4799307A (en) * 1986-05-30 1989-01-24 Tech Research, Inc. Anchor apparatus for a tendon in prestressed concrete slab
US4928451A (en) * 1986-05-30 1990-05-29 Tech Research, Inc. Anchor apparatus for a tendon in prestressed concrete slab
US4719658A (en) * 1986-10-15 1988-01-19 Special Personal And Financial Planning And Referral Services, Inc. Hermetically sealed anchor construction for use in post tensioning tendons
DE3734954A1 (de) * 1987-03-13 1988-04-07 Dyckerhoff & Widmann Ag Korrosionsgeschuetztes zugglied, vornehmlich spannglied fuer spannbeton ohne verbund und verfahren zu seinem einbau
US5024032A (en) * 1987-08-24 1991-06-18 Alan Rodriguez Post-tensioning anchor
US4821474A (en) * 1987-08-24 1989-04-18 Alan Rodriguez Post-tensioning anchor
US5079879A (en) * 1987-08-24 1992-01-14 Alan Rodriguez Anti-corrosive post-tensioning anchorage system
US4918887A (en) * 1987-10-14 1990-04-24 Vsl Corporation Protective tendon tensioning anchor assemblies
US4896470A (en) * 1988-04-21 1990-01-30 Varitech Industries, Inc. Tendon tensioning anchor
US5072558A (en) * 1988-04-21 1991-12-17 Varitech Industries, Inc. Post-tension anchor system
DE3819023A1 (de) * 1988-06-03 1989-12-07 Werner Zapf Bewehrungsanordnung fuer baukonstruktionen aus spannbeton
ES2100171T3 (es) * 1988-12-27 1997-06-16 Varitech Ind Inc Metodo de encapsular un anclaje tensor de tendones.
US5058469A (en) * 1989-08-21 1991-10-22 Alan Rodriguez Cable shear and clamp system
US5440842A (en) * 1992-12-09 1995-08-15 Felix L. Sorkin Sealed tendon-tensioning anchor system
US5347777A (en) * 1993-04-23 1994-09-20 Post Tension Product Mfg., Inc. Anchor plate assembly
US5720139A (en) * 1996-02-26 1998-02-24 Sorkin; Felix L. Method and apparatus for installing a multi-strand anchorage system
US6027278A (en) * 1998-01-15 2000-02-22 Sorkin; Felix L. Wedge-receiving cavity for an anchor body of a post-tension anchor system
US6234709B1 (en) * 1998-01-15 2001-05-22 Felix L. Sorkin Wedge-receiving cavity with radiused edge for an anchor body of a post-tension anchor system
US6017165A (en) * 1998-01-15 2000-01-25 Sorkin; Felix L. Wedge-receiving cavity for an anchor body of a post-tension anchor system
RU2178045C1 (ru) * 2001-04-02 2002-01-10 Открытое акционерное общество "Мостотрест" Арматурный пучок из высокопрочных канатов и способ изготовления предварительно напряженных железобетонных конструкций с арматурными пучками
RU2178488C1 (ru) * 2001-04-02 2002-01-20 Открытое акционерное общество "Мостотрест" Устройство для анкеровки арматурного каната с антикоррозионной защитой
US8015774B1 (en) * 2008-07-31 2011-09-13 Sorkin Felix L Process and apparatus for forming a sheathing retaining anchor
CA2749574C (en) * 2008-12-16 2014-08-19 Research In Motion Limited Hybrid automatic repeat request round trip time and acknowledgement/negative acknowledgement repetition in discontinuous reception
CA2804282C (en) * 2010-07-13 2019-05-07 Actuant Corporation Pocketed concrete anchor
US9834933B2 (en) * 2016-01-14 2017-12-05 John T. Schmidt Post-tension cable protection system, method for installing the system and method for remediation of a defective post-tension reinforcement system
CN110130650A (zh) * 2019-05-24 2019-08-16 中国长江三峡集团有限公司 一种齿条预应力钢筋的防腐施工方法

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US2185749A (en) * 1937-01-29 1940-01-02 Kennedy Robert Charles Means of reinforcing concrete
US2614660A (en) * 1947-06-27 1952-10-21 Thomas J House Covered spring greasing device
US2628518A (en) * 1949-01-14 1953-02-17 Mitan Edward Frank Spring lubricating apparatus
US2755657A (en) * 1951-11-29 1956-07-24 Finsterwalder Ulrich Post-stressed reinforcing rod anchor
FR1209949A (fr) * 1958-05-02 1960-03-04 Stup Procedes Freyssinet Perfectionnements aux procédés et dispositifs d'ancrage pour barres de mise en précontrainte
DE1484214A1 (de) * 1963-06-15 1969-11-20 Hochtief Ag Hoch Tiefbauten Verfahren und Vorrichtung zum Fuellen von Spanndrahtkanaelen und Ankerkopfnischen mit Zementmoertel
US3268032A (en) * 1964-02-28 1966-08-23 Stewart Warner Corp Means for and method of lubricating flexible cable assemblies
GB1216923A (en) * 1968-04-24 1970-12-23 Ccl Systems Ltd Improvements in or relating to anchorage assemblies for the prestressing of concrete structures
CH482080A (de) * 1969-03-26 1969-11-30 Brandestini Antonio Ankerkörper für Spannglieder
DE1917370A1 (de) * 1969-04-03 1970-11-19 Sager & Woerner Anordnung zum Schutze von Spanngliederverankerungen
US3646748A (en) * 1970-03-24 1972-03-07 Frederic A Lang Tendons for prestressed concrete and process for making such tendons
FR2335319A1 (fr) * 1975-12-19 1977-07-15 Intrafor Cofor Procede et dispositif d'injection d'un coulis dans une gaine de cable ou de tirant precontraint de grande longueur
DE8002045U1 (de) * 1980-01-26 1980-04-30 Dyckerhoff & Widmann Ag, 8000 Muenchen Wiedergewinnbares schalungsteil fuer den verankerungsbereich eines spannglieds in einem betonbauteil
US4348844A (en) * 1980-09-25 1982-09-14 Morris Schupack Electrically isolated reinforcing tendon assembly and method
FR2492870A1 (fr) * 1980-10-27 1982-04-30 Precontrainte Structures Ste F Tete d'ancrage de cable pour ouvrage en beton precontraint

Also Published As

Publication number Publication date
FR2544768B1 (fr) 1985-08-16
DE3468469D1 (en) 1988-02-11
FR2544768A1 (fr) 1984-10-26
ATE31772T1 (de) 1988-01-15
US4561226A (en) 1985-12-31
EP0122860A3 (en) 1985-06-19
EP0122860A2 (de) 1984-10-24

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