EP0439399B1 - Baueinheit zum Herstellen von vorgespannten Betongegenständen - Google Patents

Baueinheit zum Herstellen von vorgespannten Betongegenständen Download PDF

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Publication number
EP0439399B1
EP0439399B1 EP19910400141 EP91400141A EP0439399B1 EP 0439399 B1 EP0439399 B1 EP 0439399B1 EP 19910400141 EP19910400141 EP 19910400141 EP 91400141 A EP91400141 A EP 91400141A EP 0439399 B1 EP0439399 B1 EP 0439399B1
Authority
EP
European Patent Office
Prior art keywords
module
products
prestressed concrete
wires
concrete products
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
EP19910400141
Other languages
English (en)
French (fr)
Other versions
EP0439399A1 (de
Inventor
Paul Savard-Chambard
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.)
RECTOR S.A.
Original Assignee
RECTOR 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 RECTOR SA filed Critical RECTOR SA
Publication of EP0439399A1 publication Critical patent/EP0439399A1/de
Application granted granted Critical
Publication of EP0439399B1 publication Critical patent/EP0439399B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B15/00—General arrangement or layout of plant ; Industrial outlines or plant installations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B13/00—Feeding the unshaped material to moulds or apparatus for producing shaped articles; Discharging shaped articles from such moulds or apparatus
    • B28B13/04—Discharging the shaped articles
    • B28B13/06—Removing the shaped articles from moulds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B23/00—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects
    • B28B23/02—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects wherein the elements are reinforcing members
    • B28B23/04—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects wherein the elements are reinforcing members the elements being stressed

Definitions

  • the present invention relates to an independent module for manufacturing prestressed concrete products, its preparation device and the products obtained with such modules.
  • the manufacturing technique for these products is based on the provision in the molds, before concreting, of special steels for prestressing; these are held by one of their ends beyond one end of the mold, and receive at their other end, beyond the other end of the mold, a force causing them to have elastic elongation. After pouring, setting and drying the concrete, the steels are relaxed and released, thus putting the molded product in prestress.
  • Steels are generally wires which can be used over long lengths, the tension being the same in all respects.
  • the consumption of long products (beams and beams) being important, we developed the mass production technique on large benches.
  • These consist of a long (50 to 100 meters and more) and flat slab on which there is a plurality of modules, each comprising several molds arranged in parallel.
  • Steel wires run the entire length of the bench between two massifs where they are anchored. The molds of the adjacent modules are aligned so that a cable passes successively through all of the modules.
  • one of the production techniques is manufacturing on a carousel. It is a closed circuit composed of successive stations, each station corresponding to a particular operation.
  • This technique adapts well to the production of medium-sized elements of the order of a few meters (up to about 20 meters), transportable from station to station and inside an oven, and capable of be handled easily. It also adapts to variable production rates according to demand.
  • Carousel installations are known for elongated products preloaded in particular by patents US-A-3,577,610, GB-A-2,113,600 or US-A-3,281,911, however the products are produced in independent molds, one from the other. other and not grouped and arranged in a module, and the molds themselves have a framework supporting the prestressing forces.
  • EP-A-0 057 635 describes a device for producing elongated prestressed products in a carousel.
  • the head screens on which the ends of the wires are anchored relate directly to the concrete product. It is therefore not possible to relax the wires in the screens before cutting them, which is a serious drawback from the point of view of operator safety and for the quality of the product.
  • the shape of the molds cannot be arbitrary because the demoulding must take place by lifting the product simultaneously with the release of the tensioning hooks.
  • the device does not allow the production of prestressed pre-slabs because it is impossible in practice to produce head screens supporting the stress imposed by the large number of steel wires without deformation.
  • One objective of the invention is the production of an independent module for manufacturing prestressed concrete products of small dimension of the beam, beam or pre-slab or other type in molds usable in large benches such as those described in the patents of the applicant. cited above, for example.
  • the subject of the invention is a module for manufacturing flat or elongated products of prestressed concrete of the type comprising, on the one hand, a rigid frame made up of two longitudinal members held parallel by at least two spacers and intended to receive at least one mold placed on the spacers, on the other hand, a means of attachment by trimmers and of tensioning a bundle of steel wires intended to pass through said mold, characterized in that one of the trimmers is fixed, mounted at one end of the side members , the other is mobile, connected to the other end of the side members by at least one tensioning jack, the trimmers being and remaining mechanically independent of the mold.
  • the module is also remarkable in that the headers each carry a comb for prepositioning the wires.
  • the module 1 is a rectangle frame inside which the formworks are arranged.
  • the formwork can be either: a pre-slab plate 3a, beams molds 3b of the type described in the aforementioned patents, or lintel molds 3c.
  • the frame is formed on the one hand by two parallel longitudinal longitudinal members 2, or equivalent elements, dimensioned to take up the prestressing forces, maintained by spacers 4 preferably profiles, on the other hand by two trimmers 5, 6 perpendicular to the longitudinal members , intended to receive a comb where the prestressed steel wires 20 are positioned and anchored and to tension the bundle of wires.
  • One 5 of the two headers is fixed, rigidly mounted at one of the ends 7 of the side members, the other 6 is mobile and is connected to the opposite ends 8 of said side members by a jack 9 for tensioning.
  • the two headers 5 and 6 each carry a support 49 for the prepositioning of the wires.
  • the upper surface of the spacers 4 defines a plane on which the molds 3 rest ( Figure 2).
  • the components 2, 3, 4, 5, 9 are mechanically rigidly assembled so that the various manipulations do not cause harmful deformations.
  • modules 1 can be incorporated into the various systems for manufacturing concrete elements by carousels, therefore their dimensions are variable. However, it is possible to set as a medium base a width of 2.70 m x 12.50 m long and a height requirement of the order of 60 cm; this last dimension is dependent on the products to be manufactured while the other two are more related to the geometry of the manufacturing carousel which will receive the modules.
  • Two profiles 10 are also arranged along the side members 2, on the outer sides. These are profiles bearing and guide provided for moving the module in the carousel.
  • the originality of the module is that it can be prepared in a station separate from the path of the carousel, and above all that the steel wires 20 can be put in place on a comb which will then be installed in the forms 3 themselves installed. in the module, this installation being carried out in a station provided for this purpose.
  • the shape of the molds does not depend on the demolding process, because one can use molds that open laterally, like those used in production on large benches.
  • this module can be used in a carousel without substantially modifying the operation of said carousel.
  • the carousel, hitherto reserved for the production of slabs becomes a multi-product installation.
  • the modules being prepared outside the carousel circuit, the operation is not interrupted by the change of form, and the production can be continuous.

Landscapes

  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Manufacturing Of Tubular Articles Or Embedded Moulded Articles (AREA)

Claims (2)

  1. Modul zur Herstellung flacher oder länglicher Erzeugnisse aus Spannbeton, mit einem steifen Rahmen, der aus zwei Längsträgern (2) gebildet ist, die durch wenigstens zwei Verbindungsträger (4) parallel zueinander gehalten werden, und der zur Aufnahme wenigstens einer auf den Verbindungsträgern angeordneten Schalung (3) bestimmt ist, und mit einer aus Balken bestehenden Einrichtung zum Einhängen und zum Spannen eines Bündels (38) von Stahldrähten zum Durchlaufen der Schalung, dadurch gekennzeichnet, daß der eine (5) der Balken fest an einem Ende (7) der Längsträger befestigt ist, während der andere Balken (6) beweglich angebracht und mit dem anderen Ende (8) der Längsträger über wenigstens einen Spannzylinder (9) verbunden ist, wobei die Balken von der Schalung (3) mechanisch unabhängig sind und bleiben.
  2. Modul nach Anspruch 1, dadurch gekennzeichnet, daß die Balken (5, 6) jeweils einen Halter (49) als Element zum Vorpositionieren der Drähte tragen.
EP19910400141 1990-01-22 1991-01-22 Baueinheit zum Herstellen von vorgespannten Betongegenständen Expired - Lifetime EP0439399B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9000682A FR2657382B1 (fr) 1990-01-22 1990-01-22 Module independant de fabrication de beton precontraint et son procede de mise en óoeuvre.
FR9000682 1990-01-22

Publications (2)

Publication Number Publication Date
EP0439399A1 EP0439399A1 (de) 1991-07-31
EP0439399B1 true EP0439399B1 (de) 1995-06-14

Family

ID=9392985

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19910400141 Expired - Lifetime EP0439399B1 (de) 1990-01-22 1991-01-22 Baueinheit zum Herstellen von vorgespannten Betongegenständen

Country Status (3)

Country Link
EP (1) EP0439399B1 (de)
DE (1) DE69110308T2 (de)
FR (1) FR2657382B1 (de)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2050650T1 (es) * 1992-10-08 1994-06-01 Wayss & Freytag Ag Encofrado circundante para piezas acabadas de hormigon pretensado.
SE532267C2 (sv) * 2008-03-28 2009-11-24 Ulrika Palmer System och metod för tillverkning och hantering av prefabricerade byggnadsdelar
US8025493B2 (en) * 2009-08-12 2011-09-27 Petrov George Apparatus for manufacturing a pre-cast retaining wall
CZ304279B6 (cs) * 2010-09-14 2014-02-12 Václav Nevřiva Způsob výroby předem předpjatých monolitických železobetonových konstrukcí a zařízení k provádění způsobu
CN105835226B (zh) * 2016-05-26 2019-02-01 中铁二十三局集团轨道交通工程有限公司 一种先张法预制梁台座
CN109571721B (zh) * 2018-12-10 2024-01-30 江苏建筑职业技术学院 一种便于调整的预应力混凝土双t板自承力模具

Family Cites Families (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE641590C (de) * 1934-11-09 1937-02-06 Konrad Kisse Vorrichtung zum Vorspannen der Bewehrungseisen in Eisenbetonstaeben
GB532395A (en) * 1939-07-21 1941-01-23 William Herbert Smith Improvements in or relating to methods and apparatus for removing moulds from moulded concrete or other articles
FR891889A (fr) * 1942-11-16 1944-03-22 Procédé et appareillage pour la construction d'éléments en béton dont les armatures sont soumises à tension préalable
FR1003109A (fr) * 1946-12-05 1952-03-14 Ile De Rech S Pour L Etude De Moule pour éléments en béton armé précontraint
GB645449A (en) * 1948-04-05 1950-11-01 Ernest Roland Hole Improvements in and relating to prestressing reinforcement for moulding concrete beams and the like
BE492711A (fr) * 1949-12-13 1949-12-31 Delcourt G G Procédé et dispositif pour la fabrication en sèrie d'elements en bèton vibré precontraint
DE1083169B (de) * 1956-06-07 1960-06-09 Betoma Meyer Farion & Co K G Verfahren und Vorrichtung zum Herstellen von Spannbetonteilen
GB851140A (en) * 1958-05-07 1960-10-12 Siporex Int Ab Apparatus for manufacturing reinforcement for concrete building elements
US3281911A (en) * 1959-10-05 1966-11-01 American Concrete Crosstie Co Pallet for making prestressed concrete
US3577610A (en) * 1968-04-16 1971-05-04 Little Inc A Apparatus for manufacturing prestressed concrete members
DE1759681A1 (de) * 1968-05-27 1971-06-16 Bartram Friedrich Dipl Ing Einrichtung zum Herstellen von Spannbeton-Bauelementen
US3666385A (en) * 1969-07-03 1972-05-30 Robert S Baker Apparatus for making prestressed concrete members
US3611518A (en) * 1969-10-30 1971-10-12 American Concrete Crosstie Co Apparatus for removing cured concrete articles from pallets
GB1377189A (en) * 1971-03-05 1974-12-11 Hollandsche Betongroep Nv Mould for casting concrete
US4040775A (en) * 1975-09-29 1977-08-09 Nordbak John A Apparatus for making a prestressed concrete slab
US4102957A (en) * 1975-11-20 1978-07-25 Canfarge Ltd (Francon Division) Apparatus and method for manufacturing prestressed concrete railway ties
FR2498976A1 (fr) * 1981-02-04 1982-08-06 Borcoman Mircea Methode, dispositifs, structures porteuses de moules et installations pour l'amelioration de l'efficacite des procedes pour la fabrication des produits en beton precontraint
FR2519898B1 (fr) * 1982-01-21 1987-08-28 Vagneux Traverses Beton Arme S Ensemble de moulage d'elements en beton arme precontraint, notamment de traverses, et procede de fabrication de ces elements
DE3931201C1 (en) * 1989-09-19 1990-11-22 Wayss & Freytag Ag, 6000 Frankfurt, De Concrete railway sleepers mfr. - uses moving frame mechanism which releases each sleeper immediately

Also Published As

Publication number Publication date
EP0439399A1 (de) 1991-07-31
DE69110308D1 (de) 1995-07-20
FR2657382A1 (fr) 1991-07-26
FR2657382B1 (fr) 1996-07-19
DE69110308T2 (de) 1996-03-07

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