EP0799950A1 - Formwork system with adjustable curvature - Google Patents

Formwork system with adjustable curvature Download PDF

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Publication number
EP0799950A1
EP0799950A1 EP97420055A EP97420055A EP0799950A1 EP 0799950 A1 EP0799950 A1 EP 0799950A1 EP 97420055 A EP97420055 A EP 97420055A EP 97420055 A EP97420055 A EP 97420055A EP 0799950 A1 EP0799950 A1 EP 0799950A1
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EP
European Patent Office
Prior art keywords
formwork
bending
formwork device
sheet
curvature
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Granted
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EP97420055A
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German (de)
French (fr)
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EP0799950B1 (en
Inventor
Gilles Four
Joel Four
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EUROBRESS Sarl
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EUROBRESS Sarl
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Publication of EP0799950A1 publication Critical patent/EP0799950A1/en
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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
    • E04G11/00—Forms, shutterings, or falsework for making walls, floors, ceilings, or roofs
    • E04G11/06—Forms, shutterings, or falsework for making walls, floors, ceilings, or roofs for walls, e.g. curved end panels for wall shutterings; filler elements for wall shutterings; shutterings for vertical ducts
    • E04G11/062—Forms for curved walls

Definitions

  • the present invention relates to a formwork device with adjustable radius of curvature, in particular for concrete structures.
  • Concrete structures are produced by placing formwork which defines a volume in the form of the desired final profile into which the concrete is poured.
  • the formwork panels In the construction of vertical flat walls of constant thickness, the formwork panels include two parallel faces supported by a rigid framework so as to take up the pressure forces of the poured concrete.
  • each formwork panel is made from a metal sheet or in some cases using plywood plates.
  • Existing formwork devices include panels with a predetermined radius of curvature, on which plywood plates are mounted.
  • Geometric defects are caused by the fact that the plywood bends but that it nevertheless undergoes, as it is used, wear which increases surface defects.
  • the plywood must be of considerable thickness to withstand the pressures of the poured concrete, which has the consequence of causing visible facets as soon as the formwork is removed.
  • Solutions have been envisaged by combining, for example, metal formwork sheets with an articulated frame so as to be able to adjust the radius of curvature of the two formwork sheets facing each other.
  • Such a device comprises vertical holding beams regularly spaced along generatrices of the sheet to be bent.
  • the support beams have V or Omega profiles, the ends of which are joined to the shuttering sheets by welding or screwing.
  • the profile of the support beams leads to an excellent connection with the formwork sheet over a large area and thus completely stiffens the connection.
  • the beams are connected in pairs using profiles which are themselves joined together by traction or compression cylinders.
  • traction or compression cylinders By acting by compression or traction of the cylinders, one obtains a bringing together or a distance of the beams from one another, thus giving the formwork sheet a radius of curvature.
  • This embodiment has drawbacks, since the connections being perfectly fixed, it can be seen that the shuttering sheet is shaped according to a radius of curvature which is not uniform and has many facets in line with each of the beams.
  • one solution consists in multiplying the number of beams, but in addition to the fact that the cost increases, the setting up and the adjustment of the radius of curvature becomes very delicate.
  • the object of the invention is to provide a formwork device with adjustable radius of curvature which is easy to set up on construction sites, and which has a very long service life.
  • the formwork device according to the invention must not be fragile during transport, and must make it possible to produce a finished product after formwork of high quality for raw use.
  • the formwork device comprises a formwork sheet integral with a set of holding beams regularly spaced along generators, length adjusting means extending transversely to the holding beams and connecting them , bending jigs cut to a determined radius of curvature, clamping means which enable the bending jigs to be pressed against the formwork sheet, and adjustment means which are provided for deforming the formwork sheet either along the radius of curvature of the bending jigs, or according to radii of curvature different from that of the bending jigs but included in the elastic deformation of said jigs.
  • the formwork device comprises a bending template in its upper part and in its lower part.
  • the particular arrangement of the holding beams makes it possible to have inside of these clamping means for applying the bending template against the formwork sheet.
  • FIG. 1 and 2 show a formwork device 1 with adjustable radius of curvature for concrete structures.
  • the formwork device 1 is shown in the rest position, that is to say before bending.
  • the formwork device 1 comprises a formwork sheet 2 which is integral with a set of holding beams 3.
  • the formwork device 1 comprises, for example, four identical parallel holding beams referenced 30 to 33 each having a shaped profile of V with truncated point.
  • the beams 30 to 33 are regularly spaced over the width of the formwork sheet 2. It is noted that the holding beams 30 to 33 are arranged along parallel generatrices over the entire height of the formwork sheet 2.
  • the beams 30 to 33 have a V-shaped profile with a truncated point, the free ends of the two branches 34, 35 of which extend respectively by a parallel segment 36, 37 which is welded to the formwork sheet 2.
  • the beams 30 to 33 are interconnected by length adjustment means extending transversely to the said beams and connecting these two by two in the upper and lower part of the formwork device 1.
  • the adjustment means consist of identical bevels 4 and 5 which are fixed to the truncated points of each beam 30 to 33.
  • the bevels 4 and 5 are arranged perpendicular to the beams 30 to 33 and in the upper and lower part of the formwork device 1.
  • the beams 30 and 31 are connected by two parallel grooves 4, while the beams 32 and 33 are connected by two parallel grooves 5.
  • the comines 4 and 5 of the formwork device 1 are connected to each other by screw jacks 6 which are either separated or tightened according to the radius of curvature of bending that the formwork device 1 must have.
  • the trays 4 and 5 each comprise at least one oblong opening 40.50 in which the fixing means 38 cooperate with the corresponding beam to allow the bending of the formwork device 1 as will be seen better below.
  • angles 4 and 5 are connected opposite to each screw jack 6 to the formwork sheet 2 by screw jacks 7 which make it possible to improve the adjustment of the radius of curvature of said formwork sheet at the level of its free ends.
  • the formwork device 1 comprises reinforcement rails 11 parallel to the beams 30 to 33.
  • the rails 11 are fixed over the entire height of the formwork sheet 2 and at the free ends of the latter.
  • FIGS. 3 and 4 show clamping means 8 which are arranged inside each beam 30 to 33, of the formwork device 1 for the installation of a bending jig 10.
  • the clamping means 8 are provided at each end of the beams 30 to 33, that is to say in the upper and lower part of the formwork device 1.
  • Each clamping means 8 consists of a metal heel 80 acting as a clamping stop which slides parallel and above the segments 36, 37 of each beam 30 to 33.
  • the horizontal heel 80 is integral with a sleeve 81 in U shape in which is welded a nut 82 which cooperates with a screw 83.
  • the latter has a conical worn head 84 which is housed in a washer 86 of the same profile.
  • the washer 86 is welded to the truncated part of the V-shaped profile of each beam 30 to 33.
  • the sleeve 81 is integral with a first tubular element 87 which cooperates coaxially with the internal part of a second element 88 of the same profile.
  • the second element 88 is welded to a plate 89 which comes to bear on the washer 86 with a conical bearing.
  • the screw 83 comprises coaxially with its body a skirt 85 which abuts against the plate 89 to prevent the removal of said screw 83.
  • FIG. 5 another clamping means 9 has been shown which is arranged at the same level as the clamping means 8 but close to the beams 30 and 35 and in the upper and lower part of the formwork device 1.
  • Each clamping means 9 consists of a tubular sleeve with a square or circular section 90 which is fixed to the reinforcing beam 11 secured to the shuttering sheet 2.
  • a nut 92 Inside the sleeve 90 is welded a nut 92 which cooperates with a screw 93.
  • the head 94 of the screw 93 has a conical bearing which comes to bear on a washer 95 having a complementary internal profile.
  • the washer 95 and welded to a support plate 96 which is integral with a sleeve 97 of the same profile as that 90 in order to penetrate inside this latter.
  • the screw 93 is integral with a stop 98 which prevents its removal by coming to bear against the washer 95.
  • the clamping means 9 makes it possible to retain the bending jig 10 against the shuttering sheet 2 by means of the plate 96 when the screw 93 is actuated in rotation.
  • a clamping means 9 is provided at each corner of the formwork device 1.
  • the adjustment means 4, 5, 6, 7 make it possible to perform a pre-bending of the formwork device 1 and more particularly of the formwork sheet 2.
  • the pre-bending is carried out simultaneously in the upper and lower part of the formwork 1.
  • the bending template 10 made either of wood, or of plastic such as polyethylene, or of nylon.
  • the bending template 10 is cut to a determined radius of curvature.
  • the bending jig 10 is arranged in the upper and lower part of the formwork device 1. Thus, each bending jig 10 is retained against the formwork sheet 2 by means of the clamping means 8 provided in each beam 30 to 33 .
  • each bending jig 10 is held at the ends of the formwork device 1 by means of the clamping means 9 which enable said jig to be pressed against the formwork sheet 2.
  • the adjustment means 4, 5, 6 and 7 are adjusted in order to perfectly deform the formwork sheet 2, ie at the radius of curvature of the jigs bending 10, either at different radii of curvature but included in the elastic deformation of said templates.
  • formwork devices 1 can be arranged one beside the other and one above the other to constitute, for example, a wall with a curved profile.
  • a central groove in which is disposed a seal is provided on the bending jigs 10 a central groove in which is disposed a seal, making it possible to avoid the flow of the laitance contained in concrete.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Moulds, Cores, Or Mandrels (AREA)
  • Forms Removed On Construction Sites Or Auxiliary Members Thereof (AREA)
  • Vehicle Body Suspensions (AREA)
  • Sanitary Device For Flush Toilet (AREA)
  • Heating, Cooling, Or Curing Plastics Or The Like In General (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)
  • Radar Systems Or Details Thereof (AREA)

Abstract

The shuttering panel, especially for concrete structures, consists of a metal sheet (2) equipped with a series of regularly-spaced lengthwise supporting beams and transverse templates (1), e.g. at the top and bottom, to vary the curvature of the metal sheet. The templates are pressed against the surface of the metal sheet by fastenings (8) and adjusted by means of regulating elements (4, 5, 6, 7). The templates can be made from wood, plastic or nylon, and each one has a central groove for a seal.

Description

La présente invention a pour objet un dispositif de coffrage à rayon de courbure réglable, notamment pour les ouvrages en béton.The present invention relates to a formwork device with adjustable radius of curvature, in particular for concrete structures.

La réalisation des ouvrages en béton s'effectue par leur mise en place de coffrages qui délimitent un volume ayant la forme du profil final recherché dans lequel est coulé le béton.Concrete structures are produced by placing formwork which defines a volume in the form of the desired final profile into which the concrete is poured.

Dans la construction de murs plans verticaux et d'épaisseur constante, les panneaux de coffrage comprennent deux faces parallèles soutenues par une ossature rigide de façon à reprendre les efforts de pressions du béton coulé.In the construction of vertical flat walls of constant thickness, the formwork panels include two parallel faces supported by a rigid framework so as to take up the pressure forces of the poured concrete.

La face de chaque panneau de coffrage est réalisée à partir d'une tôle métallique ou dans certains cas à l'aide de plaques de contre-plaqué.The face of each formwork panel is made from a metal sheet or in some cases using plywood plates.

Un problème se pose lorsqu'il s'agit de réaliser la construction de murs à profil courbe. Les dispositifs de coffrage existants comprennent des panneaux ayant un rayon de courbure prédéterminé, sur lesquels sont montées des plaques en contre-plaqué.A problem arises when it comes to constructing walls with a curved profile. Existing formwork devices include panels with a predetermined radius of curvature, on which plywood plates are mounted.

De tels dispositifs ne sont pas satisfaisant car le contre-plaqué s'use vite et il faut le remplacer régulièrement ce qui représente un temps d'immobilisation important et un coût non moins important.Such devices are not satisfactory because the plywood wears out quickly and must be replaced regularly which represents a significant downtime and a cost no less important.

Par ailleurs, de nombreuses constructions utilisent des murs en béton brut et il convient que l'état de surface de la peau extérieure constituée soit par la tôle métallique, soit par les plaques de contre-plaqué du dispositif de coffrage soit aussi parfait que possible.Furthermore, many constructions use raw concrete walls and the surface condition of the outer skin formed either by the metal sheet or by the plywood plates of the formwork device should be as perfect as possible.

L'utilisation du bois comme panneau de coffrage ne conduit pas à un état de surface suffisamment lisse et exempt de défauts pour être utilisé tel quel dans des constructions de mûrs à profil courbe.The use of wood as a formwork panel does not result in a sufficiently smooth and defect-free surface finish to be used as it is in wall constructions with curved profiles.

Les défauts géométriques sont engendrés par le fait que le contre-plaqué se courbe mais qu'il subit néanmoins, au fur et à mesure de son utilisation une usure qui vient augmenter les défauts de surface.Geometric defects are caused by the fact that the plywood bends but that it nevertheless undergoes, as it is used, wear which increases surface defects.

De plus, le contre-plaqué doit être d'une épaisseur importante pour supporter les pressions du béton coulé ayant pour conséquence de provoquer des facettes visibles dès le retrait du coffrage.In addition, the plywood must be of considerable thickness to withstand the pressures of the poured concrete, which has the consequence of causing visible facets as soon as the formwork is removed.

Des solutions ont été envisagées en associant par exemple des tôles de coffrage métallique avec un chassis articulé de façon à pouvoir régler le rayon de courbure des deux tôles de coffrage en vis à vis.Solutions have been envisaged by combining, for example, metal formwork sheets with an articulated frame so as to be able to adjust the radius of curvature of the two formwork sheets facing each other.

Un tel dispositif comprend des poutres de maintien vertical régulièrement espacées suivant des génératrices de la tôle à courber.Such a device comprises vertical holding beams regularly spaced along generatrices of the sheet to be bent.

Les poutres de maintien présentent des profils en V ou en Oméga dont les extrémités sont solidarisées sur les tôles de coffrage par soudure ou vissage.The support beams have V or Omega profiles, the ends of which are joined to the shuttering sheets by welding or screwing.

Le profil des poutres de maintien conduit à une excellente liaison avec la tôle de coffrage sur une grande surface et rigidifiant ainsi totalement la liaison.The profile of the support beams leads to an excellent connection with the formwork sheet over a large area and thus completely stiffens the connection.

Les poutres sont reliées par paires à l'aide de profilés qui sont eux-mêmes réunis entre eux par des vérins de traction ou de compression. Ainsi, en agissant par compression ou traction des vérins, on obtient un rapprochement ou un éloignement des poutres les unes des autres conférant ainsi à la tôle de coffrage un rayon de courbure.The beams are connected in pairs using profiles which are themselves joined together by traction or compression cylinders. Thus, by acting by compression or traction of the cylinders, one obtains a bringing together or a distance of the beams from one another, thus giving the formwork sheet a radius of curvature.

Cette réalisation présente des inconvénients, car les liaisons étant parfaitement fixes, on s'aperçoit que la tôle de coffrage est conformée suivant un rayon de courbure qui n'est pas uniforme et présente de nombreuses facettes au droit de chacune des poutres.This embodiment has drawbacks, since the connections being perfectly fixed, it can be seen that the shuttering sheet is shaped according to a radius of curvature which is not uniform and has many facets in line with each of the beams.

Afin de diminuer cet effet inopportun, une solution consiste à multiplier le nombre de poutres, mais outre que le fait que le coût augmente, la mise en place et le réglage du rayon de courbure devient très délicat.In order to reduce this undesirable effect, one solution consists in multiplying the number of beams, but in addition to the fact that the cost increases, the setting up and the adjustment of the radius of curvature becomes very delicate.

Une autre conséquence directe de l'utilisation d'une tôle de coffrage métallique solidaire d'un grand nombre de poutres est que le rayon minimal de courbure reste trop élevé pour les besoins des utilisateurs.Another direct consequence of the use of a metal formwork sheet integral with a large number of beams is that the minimum radius of curvature remains too large for the needs of users.

C'est à ces inconvénients qu'entend plus particulièrement remédier la présente invention.It is these drawbacks that the present invention intends to remedy more particularly.

Le but de l'invention est de proposée un dispositif coffrage à rayon de courbure réglable qui soit aisé à mettre en place sur les chantiers, et qui présente une longévité très importante. Le dispositif de coffrage suivant l'invention ne doit pas être fragile durant le transport, et doit permettre de réaliser un produit fini après décoffrage de grande qualité pour une utilisation brute.The object of the invention is to provide a formwork device with adjustable radius of curvature which is easy to set up on construction sites, and which has a very long service life. The formwork device according to the invention must not be fragile during transport, and must make it possible to produce a finished product after formwork of high quality for raw use.

A cet effet le dispositif de coffrage selon l'invention comprend une tôle de coffrage solidaire d'un jeu de poutres de maintien régulièrement espacé suivant des génératrices, des moyens de réglage en longueur s'étendant transversalement aux poutres de maintien et reliant celles-ci, des gabarits de cintrage découpés à un rayon de courbure déterminé, des moyens de serrage qui permettent de plaquer les gabarits de cintrage contre la tôle de coffrage, et des moyens de réglage qui sont prévus pour déformer la tôle de coffrage soit suivant le rayon de courbure des gabarits de cintrage, soit suivant des rayons de courbures différents de celui des gabarits de cintrage mais compris dans la déformation élastique desdits gabarits.To this end, the formwork device according to the invention comprises a formwork sheet integral with a set of holding beams regularly spaced along generators, length adjusting means extending transversely to the holding beams and connecting them , bending jigs cut to a determined radius of curvature, clamping means which enable the bending jigs to be pressed against the formwork sheet, and adjustment means which are provided for deforming the formwork sheet either along the radius of curvature of the bending jigs, or according to radii of curvature different from that of the bending jigs but included in the elastic deformation of said jigs.

Selon une autre caractéristique de l'invention, le dispositif de coffrage comprend un gabarit de cintrage dans sa partie supérieure et dans sa partie inférieure.According to another characteristic of the invention, the formwork device comprises a bending template in its upper part and in its lower part.

L'agencement particulier des poutres de maintien permet de disposer à l'intérieur de celles-ci des moyens de serrage pour appliquer le gabarit de cintrage contre la tôle de coffrage.The particular arrangement of the holding beams makes it possible to have inside of these clamping means for applying the bending template against the formwork sheet.

Le procédé pour la mise en oeuvre du dispositif de coffrage consiste :

  • à pré-cintrer une tôle de coffrage solidaire suivant ses génératrices de poutres de maintien par l'intermédiaire de moyens de réglages tel quel des vérins à vis,
  • à plaquer un gabarit de cintrage présentant un rayon de courbure déterminé dans la partie supérieure et inférieure du dispositif de coffrage,
  • à agir sur des moyens de serrage prévus dans chaque poutre de maintien pour plaquer les gabarits de cintrage contre la tôle de coffrage,
  • et à actionner les moyens de réglages pour cintrer la tôle de coffrage soit au rayon de courbure des gabarits de cintrage, soit à des rayons de courbures différents mais compris dans la déformation élastiques des gabarits de cintrage.
The method for implementing the formwork device consists of:
  • pre-bending a formwork sheet integral with its generators of holding beams by means of adjustment means such as screw jacks,
  • applying a bending template having a determined radius of curvature in the upper and lower part of the formwork device,
  • acting on clamping means provided in each holding beam to press the bending jigs against the formwork sheet,
  • and actuating the adjustment means for bending the shuttering sheet either at the radius of curvature of the bending jigs, or at different radii of curvature but included in the elastic deformation of the bending jigs.

Le dispositif de coffrage selon l'invention est décrit en détail ci-après et cette description comprend des références figurant aux différentes figures des planches de dessins annexées, qui représente :

  • la figure 1 est une vue de face schématique du dispositif de coffrage selon l'invention avec les poutres de maintien et les moyens réglables,
  • la figure 2 est une coupe suivant A-A de figure 1, montrant le dispositif de coffrage avant son cintrage,
  • la figure 3 est une vue semblable à celle de figure 2 illustrant le dispositif de coffrage en position cintrée,
  • la figure 4 est une vue en détail illustrant des moyens de serrage pour plaquer le gabarit de cintrage contre la tôle de coffrage,
  • la figure 5 est une coupe représentant d'autres moyens de serrage prévus à chaque extrémité de la tôle de coffrage,
  • la figure 6 est une vue de dessus montrant deux dispositifs de cintrage associés.
The formwork device according to the invention is described in detail below and this description includes references appearing in the various figures of the accompanying drawing plates, which represents:
  • FIG. 1 is a schematic front view of the formwork device according to the invention with the holding beams and the adjustable means,
  • FIG. 2 is a section along AA in FIG. 1, showing the shuttering device before it is bent,
  • FIG. 3 is a view similar to that of FIG. 2 illustrating the shuttering device in the bent position,
  • FIG. 4 is a detailed view illustrating clamping means for pressing the bending jig against the formwork sheet,
  • FIG. 5 is a section showing other clamping means provided at each end of the formwork sheet,
  • Figure 6 is a top view showing two associated bending devices.

On a montré en figure 1 et 2 un dispositif de coffrage 1 à rayon de courbure réglable pour des ouvrages en béton. Le dispositif de coffrage 1 est représenté en position de repos c'est à dire avant cintrage.FIG. 1 and 2 show a formwork device 1 with adjustable radius of curvature for concrete structures. The formwork device 1 is shown in the rest position, that is to say before bending.

Le dispositif de coffrage 1 comprend une tôle de coffrage 2 qui est solidaire d'un jeu de poutres de maintien 3. Le dispositif de coffrage 1 comprend, par exemple, quatre poutres de maintien identiques parallèles référencées 30 à 33 présentant chacune un profil en forme de V à pointe tronquée.The formwork device 1 comprises a formwork sheet 2 which is integral with a set of holding beams 3. The formwork device 1 comprises, for example, four identical parallel holding beams referenced 30 to 33 each having a shaped profile of V with truncated point.

Les poutres 30 à 33 sont régulièrement espacées sur la largeur de la tôle de coffrage 2. On note que les poutres de maintien 30 à 33 sont disposées suivant des génératrices parallèles sur toute la hauteur de la tôle de coffrage 2.The beams 30 to 33 are regularly spaced over the width of the formwork sheet 2. It is noted that the holding beams 30 to 33 are arranged along parallel generatrices over the entire height of the formwork sheet 2.

Les poutres 30 à 33 présentent un profil en forme de V à pointe tronquée, dont les extrémités libres des deux branches 34, 35 se prolongent respectivement par un segment parallèle 36, 37 qui est soudé sur la tôle de coffrage 2.The beams 30 to 33 have a V-shaped profile with a truncated point, the free ends of the two branches 34, 35 of which extend respectively by a parallel segment 36, 37 which is welded to the formwork sheet 2.

Les poutres 30 à 33 sont reliées entre elles par des moyens de réglage en longueur s'étendant transversalement aux dites poutres et reliant celles-ci deux à deux dans la partie supérieure et inférieure du dispositif de coffrage 1.The beams 30 to 33 are interconnected by length adjustment means extending transversely to the said beams and connecting these two by two in the upper and lower part of the formwork device 1.

Les moyens de réglage sont constitués de comières 4 et 5 identiques qui sont fixées sur les pointes tronquées de chaque poutre 30 à 33. Les comières 4 et 5 sont disposées perpendiculairement aux poutres 30 à 33 et dans la partie supérieure et inférieure du dispositif de coffrage 1.The adjustment means consist of identical bevels 4 and 5 which are fixed to the truncated points of each beam 30 to 33. The bevels 4 and 5 are arranged perpendicular to the beams 30 to 33 and in the upper and lower part of the formwork device 1.

On constate que les poutres 30 et 31 sont reliées par deux comières parallèles 4, tandis que les poutres 32 et 33 sont reliées par deux comières parallèles 5.It can be seen that the beams 30 and 31 are connected by two parallel grooves 4, while the beams 32 and 33 are connected by two parallel grooves 5.

Les comières 4 et 5 du dispositif de coffrage 1 sont raccordées l'une à l'autre par des vérins à vis 6 qui sont soit écartés, soit resserrés suivant le rayon de courbure de cintrage que doit présenter le dispositif de coffrage 1.The comières 4 and 5 of the formwork device 1 are connected to each other by screw jacks 6 which are either separated or tightened according to the radius of curvature of bending that the formwork device 1 must have.

Les comières 4 et 5 comprennent chacune au moins une lumière oblongue 40,50 dans laquelle coopère des moyens de fixation 38 avec la poutre correspondante pour permettre le cintrage du dispositif de coffrage 1 comme on le verra mieux plus loin.The trays 4 and 5 each comprise at least one oblong opening 40.50 in which the fixing means 38 cooperate with the corresponding beam to allow the bending of the formwork device 1 as will be seen better below.

Egalement, les cornières 4 et 5 sont raccordées à l'opposé de chaque vérin à vis 6 à la tôle de coffrage 2 par des vérins à vis 7 qui permettent d'améliorer le réglage du rayon de courbure de la dite tôle de coffrage au niveau de ses extrémités libres.Also, the angles 4 and 5 are connected opposite to each screw jack 6 to the formwork sheet 2 by screw jacks 7 which make it possible to improve the adjustment of the radius of curvature of said formwork sheet at the level of its free ends.

De la même manière, on constate qu'au milieu du dispositif de cintrage 1 et entre les comières supérieures et inférieures, il est prévu d'autres vérins à vis 7 identiques à ceux décrits ci-dessus.In the same way, it can be seen that in the middle of the bending device 1 and between the upper and lower moldings, other screw jacks 7 are provided, identical to those described above.

Le dispositif de coffrage 1 comporte des longerons de renfort 11 parallèles aux poutres 30 à 33. Les longerons 11 sont fixés sur toute la hauteur de la tôle de coffrage 2 et aux extrémités libres de cette dernière.The formwork device 1 comprises reinforcement rails 11 parallel to the beams 30 to 33. The rails 11 are fixed over the entire height of the formwork sheet 2 and at the free ends of the latter.

On a représenté en figures 3 et 4 des moyens de serrage 8 qui sont disposés à l'intérieur de chaque poutre 30 à 33, du dispositif de coffrage 1 pour la mise en place d'un gabarit de cintrage 10. Les moyens de serrage 8 sont prévus à chaque extrémité des poutres 30 à 33, c'est à dire dans la partie supérieure et inférieure du dispositif de coffrage 1.FIGS. 3 and 4 show clamping means 8 which are arranged inside each beam 30 to 33, of the formwork device 1 for the installation of a bending jig 10. The clamping means 8 are provided at each end of the beams 30 to 33, that is to say in the upper and lower part of the formwork device 1.

Chaque moyen de serrage 8 est constitué d'un talon métallique 80 faisant office de butée de serrage qui coulisse parallèlement et au-dessus des segments 36, 37 de chaque poutre 30 à 33. Le talon horizontal 80 est solidaire d'un manchon 81 en forme de U dans lequel est soudé un écrou 82 qui coopère avec une vis 83.Each clamping means 8 consists of a metal heel 80 acting as a clamping stop which slides parallel and above the segments 36, 37 of each beam 30 to 33. The horizontal heel 80 is integral with a sleeve 81 in U shape in which is welded a nut 82 which cooperates with a screw 83.

Cette demière présente une tête 84 a porté conique qui est logée dans une rondelle 86 de même profil. La rondelle 86 est soudée sur la partie tronquée du profil en forme de V de chaque poutre 30 à 33.The latter has a conical worn head 84 which is housed in a washer 86 of the same profile. The washer 86 is welded to the truncated part of the V-shaped profile of each beam 30 to 33.

Le manchon 81 est solidaire d'un premier élément tubulaire 87 qui coopère coaxialement avec la partie interne d'un second élément 88 de même profil. Le second élément 88 est soudé sur une plaque 89 qui vient prendre appui sur la rondelle 86 à portée conique. La vis 83 comprend coaxialement à son corps une jupe 85 qui vient en butée contre la plaque 89 pour empêcher le retrait de la dite vis 83.The sleeve 81 is integral with a first tubular element 87 which cooperates coaxially with the internal part of a second element 88 of the same profile. The second element 88 is welded to a plate 89 which comes to bear on the washer 86 with a conical bearing. The screw 83 comprises coaxially with its body a skirt 85 which abuts against the plate 89 to prevent the removal of said screw 83.

L'entraînement en rotation de la vis 83 par l'intermédiaire de sa tête 84 et au moyen d'une clef appropriée permet de déplacer en translation le talon horizontal 80 pour le serrage du gabarit de cintrage 10 qui vient en appui contre la tôle de coffrage 2 et dont on verra mieux plus loin la fonction.The rotational driving of the screw 83 by means of its head 84 and by means of an appropriate key makes it possible to move in translation the horizontal heel 80 for tightening the bending jig 10 which comes to bear against the sheet of formwork 2 and whose function will be better seen below.

En figure 5, on a représenté un autre moyen de serrage 9 qui est disposé au même niveau que les moyens de serrage 8 mais à proximité des poutres 30 et 35 et dans la partie supérieure et inférieure du dispositif de coffrage 1.In FIG. 5, another clamping means 9 has been shown which is arranged at the same level as the clamping means 8 but close to the beams 30 and 35 and in the upper and lower part of the formwork device 1.

Chaque moyen de serrage 9 est constitué d'un manchon tubulaire à section carré ou circulaire 90 qui est fixé sur le longeron de renfort 11 solidaire de la tôle de coffrage 2.Each clamping means 9 consists of a tubular sleeve with a square or circular section 90 which is fixed to the reinforcing beam 11 secured to the shuttering sheet 2.

A l'intérieur du manchon 90 est soudé un écrou 92 qui coopère avec une vis 93. La tête 94 de la vis 93 présente une porté conique qui vient prendre appuie dans une rondelle 95 ayant un profil inteme complémentaire.Inside the sleeve 90 is welded a nut 92 which cooperates with a screw 93. The head 94 of the screw 93 has a conical bearing which comes to bear on a washer 95 having a complementary internal profile.

La rondelle 95 et soudée sur une plaque d'appui 96 qui est solidaire d'un manchon 97 de même profil que celui 90 afin de pénétrer à l'intérieur de ce demier. La vis 93 est solidaire d'une butée 98 qui empêche son retrait en venant prendre appuie contre la rondelle 95.The washer 95 and welded to a support plate 96 which is integral with a sleeve 97 of the same profile as that 90 in order to penetrate inside this latter. The screw 93 is integral with a stop 98 which prevents its removal by coming to bear against the washer 95.

Le moyen de serrage 9 permet de retenir le gabarit de cintrage 10 contre la tôle de coffrage 2 par l'intermédiaire de la plaque 96 lorsque la vis 93 est actionnée en rotation.The clamping means 9 makes it possible to retain the bending jig 10 against the shuttering sheet 2 by means of the plate 96 when the screw 93 is actuated in rotation.

ll est prévu un moyen de serrage 9 à chaque angle du dispositif de coffrage 1.A clamping means 9 is provided at each corner of the formwork device 1.

Les moyens de réglage 4, 5, 6, 7 permettent d'effectuer un pré-cintrage du dispositif de coffrage 1 et plus particulièrement de la tôle de coffrage 2. Le pré-cintrage est effectué simultanément dans la partie supérieure et inférieure du dispositif de coffrage 1.The adjustment means 4, 5, 6, 7 make it possible to perform a pre-bending of the formwork device 1 and more particularly of the formwork sheet 2. The pre-bending is carried out simultaneously in the upper and lower part of the formwork 1.

On remarque que lors du pré-cintrage de la tôle de coffrage 2 les comières 4 et 5 s'inclinent de manière que les moyens de retenues 38 des poutres 31 et 32 coulissent à l'intérieur des lumières 40 et 50 prévues à cet effet.It is noted that during the pre-bending of the formwork sheet 2, the edges 4 and 5 tilt so that the retaining means 38 of the beams 31 and 32 slide inside the openings 40 and 50 provided for this purpose.

Il est ensuite placé le gabarit de cintrage 10 réalisé soit en bois, soit en plastique tel que du polyéthylène, soit en nylon. Le gabarit de cintrage 10 est découpé à un rayon de courbure déterminé.It is then placed the bending template 10 made either of wood, or of plastic such as polyethylene, or of nylon. The bending template 10 is cut to a determined radius of curvature.

Le gabarit de cintrage 10 est disposé dans la partie supérieure et inférieure du dispositif de coffrage 1. Ainsi, chaque gabarit de cintrage 10 est retenue contre la tôle de coffrage 2 par l'intermédiaire des moyens de serrage 8 prévue dans chaque poutre 30 à 33.The bending jig 10 is arranged in the upper and lower part of the formwork device 1. Thus, each bending jig 10 is retained against the formwork sheet 2 by means of the clamping means 8 provided in each beam 30 to 33 .

Egalement, chaque gabarit de cintrage 10 est maintenue aux extrémités du dispositif de coffrage 1 par l'intermédiaire des moyens de serrage 9 qui permettent de plaquer ledit gabarit contre la tôle de coffrage 2.Also, each bending jig 10 is held at the ends of the formwork device 1 by means of the clamping means 9 which enable said jig to be pressed against the formwork sheet 2.

Dès que les gabarits de cintrage 10 sont parfaitement maintenus dans la partie supérieure et inférieure du dispositif de coffrage 1 les moyens de réglage 4, 5, 6 et 7 sont ajustés afin de déformer parfaitement la tôle de coffrage 2 soit au rayon de courbure des gabarits de cintrage 10, soit à des rayons de courbures différents mais compris dans la déformation élastique desdits gabarits.As soon as the bending jigs 10 are perfectly maintained in the upper and lower part of the formwork device 1, the adjustment means 4, 5, 6 and 7 are adjusted in order to perfectly deform the formwork sheet 2, ie at the radius of curvature of the jigs bending 10, either at different radii of curvature but included in the elastic deformation of said templates.

Dès que le dispositif de coffrage 1 est ajusté au rayon de courbure adéquat et rechercher celui ci peut être associé à un autre dispositif de coffrage 1 identique au premier et réglé de la même façon (figure 6).As soon as the formwork device 1 is adjusted to the appropriate radius of curvature and find it can be associated with another formwork device 1 identical to the first and adjusted in the same way (Figure 6).

Ainsi plusieurs dispositifs de coffrage 1 peuvent être disposés les uns à côté des autres et les uns au-dessus des autres pour constituer, par exemple, un mur à profil courbe. Lorsque plusieurs dispositifs de coffrage 1 sont disposés les uns au-dessus des autres, il est prévu sur les gabarits de cintrage 10 une gorge centrale dans laquelle est disposée un joint d'étanchéité, permettant d'éviter l'écoulement de la laitance contenue dans le béton.Thus several formwork devices 1 can be arranged one beside the other and one above the other to constitute, for example, a wall with a curved profile. When several formwork devices 1 are arranged one above the other, there is provided on the bending jigs 10 a central groove in which is disposed a seal, making it possible to avoid the flow of the laitance contained in concrete.

Claims (12)

Dispositif de coffrage à rayon de courbure réglable, pour les ouvrages en béton, comprenant une tôle de coffrage solidaire d'un jeu de poutres de maintien régulièrement espacé suivant des génératrices et des moyens de réglage en longueur s'étendant transversalement aux poutres et reliant celles-ci, caractérisés en ce qu'il comprend des gabarits de cintrage (10) découpés à un rayon de courbure déterminé, des moyens de serrages (8,9) qui permettent de plaquer les gabarits de cintrage (10) contre la tôle de coffrage (2) et des moyens de réglage (4, 5, 6 et 7) qui sont prévus pour déformer la tôle de coffrage (2 ) soit suivant le rayon de courbure des gabarits de cintrage (10), soit suivant des rayons de courbures différents mais compris dans la déformation élastiques desdits gabarits.Formwork device with adjustable radius of curvature, for concrete structures, comprising a formwork sheet integral with a set of regularly maintained support beams along generators and length adjustment means extending transversely to the beams and connecting those -characterized in that it comprises bending jigs (10) cut to a determined radius of curvature, clamping means (8,9) which allow the bending jigs (10) to be pressed against the formwork sheet (2) and adjustment means (4, 5, 6 and 7) which are provided to deform the formwork sheet (2) either along the radius of curvature of the bending jigs (10), or along different radii of curvature but included in the elastic deformation of said templates. Dispositif de coffrage suivant la revendication 1, caractérisé en ce qu'il comprend un gabarit de cintrage (10) dans sa partie supérieure et inférieure.Formwork device according to claim 1, characterized in that it comprises a bending template (10) in its upper and lower part. Dispositif de coffrage suivant la revendication 1, caractérisé en ce que le gabarit de cintrage (10) comporte une gorge centrale dans laquelle est placé un joint d'étanchéité.Formwork device according to claim 1, characterized in that the bending template (10) has a central groove in which is placed a seal. Dispositif de coffrage suivant la revendication 1, caractérisé en ce que les moyens de serrage (8, 9) des gabarits de cintrage (10) sont disposés à l'intérieur des poutres de maintien (30 à 33).Formwork device according to claim 1, characterized in that the clamping means (8, 9) of the bending jigs (10) are arranged inside the holding beams (30 to 33). Dispositif de coffrage suivant la revendication 1, caractérisé en ce que les moyens de serrage (8) comportent un talon (80) qui est déplacé au moyen d'une vis (83) coopérant avec un écrou (82) fixé dans un manchon (81) en forme de U solidaire d'un premier élément tubulaire (87) coulissant dans un second (88) de même profil.Formwork device according to claim 1, characterized in that the clamping means (8) comprise a heel (80) which is moved by means of a screw (83) cooperating with a nut (82) fixed in a sleeve (81 ) U-shaped integral with a first tubular element (87) sliding in a second (88) of the same profile. Dispositif de coffrage suivant la revendication 5, caractérisé en ce que la vis (83) est solidaire d'une jupe (85) empêchant son retrait.Formwork device according to claim 5, characterized in that the screw (83) is integral with a skirt (85) preventing its removal. Dispositif de coffrage suivant la revendication 5, caractérisé en ce que le second élément (88) est solidaire d'une plaque (89) qui vient prendre appui sur une rondelle (86).Formwork device according to claim 5, characterized in that the second element (88) is integral with a plate (89) which comes to bear on a washer (86). Dispositif de coffrage suivant la revendication 1, caractérisé en ce que les moyens de serrage (9) comportent un manchon (90) solidaire d'un longeron (11) fixé sur la tôle de coffrage (2), un écrou (92) qui soudé à l'intérieur du manchon (90), une vis (93) qui coopère avec l'écrou (92) et dont la tête (94) à portée conique est introduite dans une rondelle de même profil (95) solidaire d'une plaque de serrage (96).Formwork device according to claim 1, characterized in that the clamping means (9) comprise a sleeve (90) integral with a beam (11) fixed on the formwork sheet (2), a nut (92) which is welded inside the sleeve (90), a screw (93) which cooperates with the nut (92) and whose head (94) with conical bearing is introduced into a washer of the same profile (95) secured to a plate clamping (96). Dispositif de coffrage suivant la revendication 8, caractérisé en ce que la plaque (96) est reliée à un manchon (97) qui coulisse à l'intérieur du manchon (90).Formwork device according to claim 8, characterized in that the plate (96) is connected to a sleeve (97) which slides inside the sleeve (90). Dispositif de coffrage suivant la revendication 1, caractérisé en ce que les poutres (30 à 33) présentent une forme de V dont les parties inclinées (34, 35) se prolongent par des segments parallèles (36, 37) qui sont soudés sur la tôle de coffrage (2).Formwork device according to claim 1, characterized in that the beams (30 to 33) have a V shape, the inclined parts (34, 35) of which are extended by parallel segments (36, 37) which are welded to the sheet metal formwork (2). Dispositif de coffrage suivant la revendication 1, caractérisé en ce que les gabarits de cintrage (10) sont réalisés soiten bois, soit en plastique, soit en nylon.Formwork device according to claim 1, characterized in that the bending jigs (10) are made either of wood, or of plastic, or of nylon. Procédé par la mise en oeuvre du dispositif de coffrage suivant la revendication 1, caractérisé en ce qu'il consiste : - à pré-cintrer une tôle de coffrage (2) solidaire suivant ses génératrices de poutres de maintien (30 à 33) par l'intermédiaire de moyens de réglages (4, 5, 6 et 7), - à plaquer un gabarit de cintrage (10) présentant un rayon de courbure déterminé dans la partie supérieure et inférieure du dispositif de coffrage (1), - à agir sur des moyens de serrage (8, 9) prévus dans chaque poutre de maintien (30 à 33) pour plaquer les gabarits de cintrage (10) contre la tôle de coffrage (2), - et à actionner les moyens de réglage (4, 5, 6, et 7) pour cintrer définitivement la tôle de coffrage (2) soit au rayon de courbure des gabarits de cintrage (10), soit à des rayons de courbures différents mais compris dans la déformation élastique desdits gabarits. Method by using the formwork device according to claim 1, characterized in that it consists: - pre-bending a formwork sheet (2) secured along its generators of holding beams (30 to 33) by means of adjustment means (4, 5, 6 and 7), - pressing a bending template (10) having a determined radius of curvature in the upper and lower part of the formwork device (1), - to act on clamping means (8, 9) provided in each holding beam (30 to 33) to press the bending jigs (10) against the formwork sheet (2), - And to actuate the adjustment means (4, 5, 6, and 7) to permanently bend the formwork sheet (2) either at the radius of curvature of the bending jigs (10), or at radii of different but included curvatures in the elastic deformation of said templates.
EP97420055A 1996-04-05 1997-04-03 Formwork system with adjustable curvature Expired - Lifetime EP0799950B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9604536 1996-04-05
FR9604536A FR2747145B1 (en) 1996-04-05 1996-04-05 FORMWORK DEVICE WITH ADJUSTABLE CURVE RADIUS

Publications (2)

Publication Number Publication Date
EP0799950A1 true EP0799950A1 (en) 1997-10-08
EP0799950B1 EP0799950B1 (en) 2002-07-31

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EP97420055A Expired - Lifetime EP0799950B1 (en) 1996-04-05 1997-04-03 Formwork system with adjustable curvature

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EP (1) EP0799950B1 (en)
AT (1) ATE221607T1 (en)
DE (1) DE69714329T2 (en)
ES (1) ES2183110T3 (en)
FR (1) FR2747145B1 (en)
PT (1) PT799950E (en)

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WO2002022990A1 (en) * 2000-09-18 2002-03-21 Ulma C Y E, S. Coop. Modular curved formwork system with variable radius
CN103866973A (en) * 2014-03-30 2014-06-18 青岛一建集团有限公司 Supporting device of three-dimensional arc cantilever concrete component formwork
CN105937302A (en) * 2016-06-14 2016-09-14 中建局集团第三建筑有限公司 Arc-shaped wall template system and application thereof in concrete pouring
CN111622489A (en) * 2020-05-11 2020-09-04 安徽云海建筑新材料有限公司 Steel frame wood-plastic formwork convenient to recycle
CN114809607A (en) * 2022-03-23 2022-07-29 上海大界智能设备有限公司 Mould system for concrete pouring
CN115506578A (en) * 2022-09-30 2022-12-23 上海强荣建设集团有限公司 Template of arc building and template system of constituteing thereof

Families Citing this family (1)

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Publication number Priority date Publication date Assignee Title
CN110397265B (en) * 2019-07-29 2021-09-21 国网河北省电力有限公司邢台供电分公司 Composite plastic plate, preparation method, template and shaping method

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DE8908734U1 (en) * 1989-07-18 1989-08-31 Josef Oevermann GmbH & Co., 4400 Münster Tower formwork
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FR2711705A1 (en) * 1993-10-27 1995-05-05 Sateco Sa Formwork device with adjustable radius of curvature, particularly for concrete constructions

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US2616148A (en) * 1949-01-11 1952-11-04 Kwikform Ltd Shuttering for use in molding arched concrete roof structures
DE8815339U1 (en) * 1988-12-09 1989-03-23 Werner Zapf KG, 8580 Bayreuth Formwork for large-format curved precast reinforced concrete elements
DE8908734U1 (en) * 1989-07-18 1989-08-31 Josef Oevermann GmbH & Co., 4400 Münster Tower formwork
FR2704260A1 (en) * 1993-04-21 1994-10-28 Ricard Coffrages Method for curving shuttering (formwork) and curvable shuttering making use of this method
FR2711705A1 (en) * 1993-10-27 1995-05-05 Sateco Sa Formwork device with adjustable radius of curvature, particularly for concrete constructions

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002022990A1 (en) * 2000-09-18 2002-03-21 Ulma C Y E, S. Coop. Modular curved formwork system with variable radius
US6530552B2 (en) 2000-09-18 2003-03-11 Ulma C Y E, S. Coop. Curved formwork system with varying curvature
CN103866973A (en) * 2014-03-30 2014-06-18 青岛一建集团有限公司 Supporting device of three-dimensional arc cantilever concrete component formwork
CN105937302A (en) * 2016-06-14 2016-09-14 中建局集团第三建筑有限公司 Arc-shaped wall template system and application thereof in concrete pouring
CN111622489A (en) * 2020-05-11 2020-09-04 安徽云海建筑新材料有限公司 Steel frame wood-plastic formwork convenient to recycle
CN114809607A (en) * 2022-03-23 2022-07-29 上海大界智能设备有限公司 Mould system for concrete pouring
CN114809607B (en) * 2022-03-23 2024-05-28 上海大界智能设备有限公司 Die system for concrete pouring
CN115506578A (en) * 2022-09-30 2022-12-23 上海强荣建设集团有限公司 Template of arc building and template system of constituteing thereof
CN115506578B (en) * 2022-09-30 2024-04-26 上海强荣建设集团有限公司 Template of arc building and template system formed by same

Also Published As

Publication number Publication date
DE69714329D1 (en) 2002-09-05
ATE221607T1 (en) 2002-08-15
ES2183110T3 (en) 2003-03-16
PT799950E (en) 2002-12-31
EP0799950B1 (en) 2002-07-31
DE69714329T2 (en) 2003-03-27
FR2747145B1 (en) 1998-05-22
FR2747145A1 (en) 1997-10-10

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