EP0571600A1 - Slab formwork panel - Google Patents

Slab formwork panel

Info

Publication number
EP0571600A1
EP0571600A1 EP19930900226 EP93900226A EP0571600A1 EP 0571600 A1 EP0571600 A1 EP 0571600A1 EP 19930900226 EP19930900226 EP 19930900226 EP 93900226 A EP93900226 A EP 93900226A EP 0571600 A1 EP0571600 A1 EP 0571600A1
Authority
EP
European Patent Office
Prior art keywords
panel
formwork
intended
panels
beams
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.)
Withdrawn
Application number
EP19930900226
Other languages
German (de)
French (fr)
Inventor
Edmond Souvignet
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.)
SOFRAMAT
Original Assignee
SOFRAMAT
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 SOFRAMAT filed Critical SOFRAMAT
Publication of EP0571600A1 publication Critical patent/EP0571600A1/en
Withdrawn legal-status Critical Current

Links

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
    • E04G1/00—Scaffolds primarily resting on the ground
    • E04G1/15—Scaffolds primarily resting on the ground essentially comprising special means for supporting or forming platforms; Platforms
    • E04G1/153—Platforms made of plastics, with or without reinforcement
    • 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
    • E04G9/00—Forming or shuttering elements for general use
    • E04G9/02—Forming boards or similar elements
    • E04G9/05—Forming boards or similar elements the form surface being of plastics

Definitions

  • the present invention relates to a slab formwork panel intended to be disposed between two rows of
  • Î parallel beams was based on the international formwork f borrowire a head capable of occupying at least two vertical positions.
  • the purpose of the present invention is to remedy at least in part to these drawbacks by providing a reusable panel incorporating in its structure elements intended * to replace the secondary beams of the above solution ⁇ mentioned so that the two operations poses s, secondary beams and panels is replaced by a single panel installation operation from below.
  • the subject of the present invention is a formwork panel intended to be placed between two rows of parallel beams resting on props by means of
  • Figure 1 is a plan view of a portion of a slab formwork system using the panel object of the invention.
  • Figure 2 is a sectional view along line II-II of Figure 1.
  • Figure 3 is a sectional view along line III-III of Figure 1.
  • FIG. 4 is a view of a variant of FIG. 3.
  • FIG. 5 is a sectional view along arrow V of FIG. 1.
  • Figure 6 is a view of Figure 5 illustrated in another position.
  • each formwork head 2 has a tubular part 4 provided with two pins 5 diametrically opposite ( Figure 6) and two sliding elements one constitutes by a support 6 provided with fins 6 intended to penetrate into grooves 1a formed transversely under the ends of the primary beams 1, the other by a rotary bolt 7 intended to cooperate with the pins 5 to fix the support 6 in the high position.
  • This shuttering head is not part of the present invention, it may explain how the formwork takes place as we will see later.
  • Two attachment profiles 8 protrude laterally on either side of the primary beam 1.
  • the structure of primary beams which has just been described is intended to receive the formwork panel 9 object of the present invention.
  • this panel essentially comprises a sandwich structure comprising two external layers formed from a composite material 10 based of a vinylester resin chosen for its good chemical resistance, in particular with respect to the constituents of concrete and good temperature resistance. Its implementation is rapid and its good fluidity ensures good wetting of the reinforcing filaments incorporated in the resin.
  • the tubular profiles 11 are arranged so as to extend transversely to the primary beams 1.
  • the tubular profiles 11 located at the ends of the panel 9 have, in the extension of their end face 11a two flanges 11b projecting respectively from the upper faces and lower. These edges 11b have a height equal to the thickness of the composite 10 and are intended to protect the edge of the composite.
  • REPLACEMENT SHEET perpendicular to the tubular profiles 11 are covered with an aluminum strip 13 which can be welded to the ends of the tubular profiles 11 and glued to the mouse between these tubes ( Figure 3).
  • connection between the panel 9 and the primary beams is obtained by fixing under the panel at the places where the ends of the tubular sections 11 are located, hooks 14 which penetrate into the channel formed by the attachment profiles 8 which projects from on either side of the primary beam 1.
  • hooks 14 can, in the variant illustrated in FIG. 3, be glued to the layer of composite material 10 or be screwed into the metal profile 11.
  • the aluminum strip 13 is replaced by an aluminum profile 15 in the form of a slide on which the hooks 16 are slidably mounted.
  • This variant has the advantage of allowing successive use of the two panel faces. When one side is out of use, the hooks 16 and the panel 9 are turned over to use the other side, which doubles the life of the panel.
  • This strip 17 can also be produced from a readable composite material.
  • the panel 9 can be produced using sheets of composite material 1.2 mm thick comprising three layers of glass filaments with a modulus of elasticity of 70,000 MPa oriented one in the longitudinal direction, the others at 45 * on either side of the longitudinal direction.
  • the module considered according to these guidelines is 49,500 MPa.
  • the resin modulus is 3000 MPa and the volume proportion of the resin is 40%.
  • We can consider that the effective module of the composite is around 24000 MPa.
  • This example shows that the panel according to the example above is widely dimensioned since the maximum admissible deflection is 1/400 so that one can choose a foam of lower density and also reduce the weight of the composite.
  • a panel according to the above example of 1.5 x 1.6 m represents a weight of the order of 18 Kg which, as we have seen, is capable of being lightened. If we compare the panel in this example to a traditional wooden panel of the same size, we obtain a reduction of 4 to 11 kg which can undoubtedly be further increased as we have seen.
  • the elastic modulus of the resin material of each layer of composite material is at least equal to 2500 MPa - in particular at least equal to 3000 MPa.
  • the density of the foam 12 can be between 20 and 150 kg / m 3 - in particular between 20 and 90 kg / m 3 -.
  • the invention also relates to a slab formwork comprising rows of parallel beams 1 resting on props by means of a formwork head capable of occupying at least two vertical positions, characterized in that it comprises formwork panels 9 according to the invention intended to be arranged between and hooked to each pair of parallel beams 1 in extension of each other so as to form a continuous planar formwork surface.
  • the formwork is characterized in that it comprises a strip 17 placed above each beam 1 and formwork heads 2 in the interval separating two panels 9 arranged on either side of the beam and whose the upper face is at n i calf those panels 9.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Forms Removed On Construction Sites Or Auxiliary Members Thereof (AREA)
  • Laminated Bodies (AREA)

Abstract

Ce panneau (9) de coffrage de dalle présente une structure sandwich dont la partie médiane est recouverte par deux couches externes (10) d'un matériau composite résine filaments de renforcement. La partie médiane est formée de profilés métalliques (11) parallèles et régulièrement espacés les intervalles séparant ces profilés étant remplis d'un matériau mousse (12) d'une densité comprise entre 20 et 90 kg/m3. Des crochets (14) sont fixés contre la face inférieure du panneau aux endroits correspondant aux extrémités des profilés (11). Ces crochets sont destinés à relier les panneaux (9) à des profilés d'accrochage (8) solidaires de poutrelles (1) destinées à porter les panneaux (9).This slab formwork panel (9) has a sandwich structure, the middle part of which is covered by two external layers (10) of a composite resin for reinforcing filaments. The middle part is formed of metal sections (11) which are parallel and regularly spaced, the intervals separating these sections being filled with a foam material (12) with a density of between 20 and 90 kg / m3. Hooks (14) are fixed against the underside of the panel at the locations corresponding to the ends of the profiles (11). These hooks are intended to connect the panels (9) to attachment profiles (8) integral with beams (1) intended to carry the panels (9).

Description

PANNEAU DE COFFRAGE DE DALLE SLAB FORMWORK PANEL
La présente invention se rapporte à un panneau de coffrage de dalle destiné à être disposé entre deux rangées deThe present invention relates to a slab formwork panel intended to be disposed between two rows of
«î poutrelles parallèles reposant sur des étais par l'inter- f médiaire d'une tête coffrante susceptible d'occuper au moins deux positions verticales."Î parallel beams was based on the international formwork f médiaire a head capable of occupying at least two vertical positions.
Il existe sur le marché un système de coffrage de dalle commercialisé sous la marque ISCHEBECK ^ par la maison Friedr. Ischebeck GmbH - 5828 Ennepetal en Allemagne, qui comporte des poutrelles primaires soutenues par des étais par l'inter¬ médiaire de têtes coffrantes et disposées en rangées paral¬ lèles. Ces poutrelles primaires sont solidaires d'éléments d'accrochages auxquels des poutrelles secondaires trans¬ versales aux poutrelles primaires s'accrochent par leurs extrémités respectives, les poutrelles primaires formant deux rangées parallèles. Cette ossature métallique est destinée à recevoir les panneaux de coffrage en contre-plaqué.There is a slab formwork system marketed under the brand ISCHEBECK ^ by the house Friedr. Ischebeck GmbH - 5828 Ennepetal in Germany, which has primary beams supported by struts by means of shuttering heads and arranged in parallel rows. These primary beams are integral with hooking elements to which secondary beams transverse to the primary beams are hooked by their respective ends, the primary beams forming two parallel rows. This metal frame is intended to receive the plywood formwork panels.
Cette solution comporte deux inconvénients dont l'un est l'utilisation de panneaux en contre-plaqué, qui ne permettent pas beaucoup de réutilisations. D'une part, la consommation croissante de bois pose de graves problèmes d'équilibre écologique, d'autre part, pour permettre le décoffrage, ces panneaux doivent être enduits d'huile de décoffrage. Un autre inconvénient réside dans le fait de nécessiter de placer les panneaux en contre-plaqué après la pose des poutrelles se¬ condaires, par-dessus l'ossature métallique, ce qui constitue un travail dangereux.This solution has two drawbacks, one of which is the use of plywood panels, which do not allow many re-uses. On the one hand, the increasing consumption of wood poses serious problems of ecological balance, on the other hand, to allow formwork, these panels must be coated with formwork oil. Another drawback lies in the fact that it is necessary to place the plywood panels after the installation of the secondary beams, over the metal framework, which constitutes dangerous work.
Le but de la présente invention est de remédier au moins en partie à ces deux inconvénients en proposant un panneau réutilisable intégrant dans sa structure des éléments destinés * à remplacer les poutrelles secondaires de la solution sus¬ mentionnée de sorte que les deux opérations de pose des s, p'outrelles secondaires et des panneaux est remplacée par une seule opération de pose des panneaux depuis le dessous.The purpose of the present invention is to remedy at least in part to these drawbacks by providing a reusable panel incorporating in its structure elements intended * to replace the secondary beams of the above solution ¬ mentioned so that the two operations poses s, secondary beams and panels is replaced by a single panel installation operation from below.
A cet effet, la présente invention a pour objet un panneau de coffrage destiné à être disposé entre deux rangées de poutrelles parallèles reposant sur des étais par l'intermé-To this end, the subject of the present invention is a formwork panel intended to be placed between two rows of parallel beams resting on props by means of
Fm-- ,-, !, ^ v-.: : ^~r~"> -»r-5s Λ C >pr•*• «s "7* diaire d'une tête coffrante susceptible d'occuper au moins deux positions verticales, caractérisé par le fait qu'il comporte une structure sandwic dont la partie médiane est recouverte par deux couches externes d'un matériau composite comprenant une matrice en résine dont le module d'élasticité est au moins égal à 2.500 MPa et dont les renforts sont constitués par au moins deux nappes de filaments parallèles dont le module d'élasticité est au moins égal à 60 000 MPa orientées selon des directions différentes, la partie médiane comprenant des éléments de renfort destinés à s'étendre transversalement aux rangées de poutrelles parallèles et alternant avec un matériau mousse d'une densité comprise entre 20 et 150 kg/m3. Les extrémités desdits éléments de renfort sont solidaires d'organes d'accrochage destinés à venir en prise avec des éléments d'accrochage solidaires desdites poutrelles.Fm--, -,!, ^ V- .:: ^ ~ r ~ "> -» r-5s Λ C> pr • * • "s" 7 * diary of a formwork head capable of occupying at least two vertical positions, characterized in that it comprises a sandwic structure, the middle part of which is covered by two external layers of a composite material comprising a resin matrix, the module of which of elasticity is at least equal to 2,500 MPa and the reinforcements of which consist of at least two sheets of parallel filaments whose elastic modulus is at least equal to 60,000 MPa oriented in different directions, the middle part comprising elements reinforcement intended to extend transversely to the rows of parallel beams and alternating with a foam material with a density of between 20 and 150 kg / m 3 . The ends of said reinforcing elements are secured to fastening members intended to come into engagement with fastening elements secured to said beams.
D'autres avantages de l'invention apparaîtront à la lumière de la description qui va suivre et des dessins annexés qui illustrent schëmatiquement et à titre d'exemple, une forme d'exécution et une variante du panneau objet de la présente invention.Other advantages of the invention will become apparent in the light of the description which follows and of the appended drawings which illustrate schematically and by way of example, an embodiment and a variant of the panel which is the subject of the present invention.
La figure 1 est une vue en plan d'une portion d'un système de coffrage de dalle utilisant le panneau objet de l'invention.Figure 1 is a plan view of a portion of a slab formwork system using the panel object of the invention.
La figure 2 est une vue en coupe selon la ligne II-II de la figure 1.Figure 2 is a sectional view along line II-II of Figure 1.
La figure 3 est une vue en coupe selon la ligne III- III de la figure 1.Figure 3 is a sectional view along line III-III of Figure 1.
La figure 4 est une vue d'une variante de la figure 3.FIG. 4 is a view of a variant of FIG. 3.
La figure 5 est une vue en coupe selon la flèche V de la figure 1.FIG. 5 is a sectional view along arrow V of FIG. 1.
La figure 6 est une vue de la figure 5 illustrée dans une autre position.Figure 6 is a view of Figure 5 illustrated in another position.
Le système de coffrage de dalle illustré par la figure 1 est basé sur le système I.V.H Ischebeck ® qui comporte des rangées parallèles de poutrelles primaires 1 dont les extrémités sont crochées à des têtes coffrantes 2 fixées à l'extrémité d'étais 3 (figure 5) . chaque tête coffrante 2 comporte une partie tubulaire 4 munie de deux tenons 5 diametralement opposés (figure 6) et de deux éléments coulis sants l'un constitue par un support 6 muni d'ailettes 6 destinées à pénétrer dans des rainures 1a ménagées trans versalement sous les extrémités des poutrelles primaires 1, l'autre par un verrou rotatif 7 destiné à coopérer avec le tenons 5 pour fixer le support 6 en position haute. Cette têt coffrante ne fait pas partie de la présente invention, mai elle permet d'expliquer comment s'effectue le décoffrage comm on le verra par la suite.The slab formwork system illustrated in FIG. 1 is based on the IVH Ischebeck ® system which comprises parallel rows of primary beams 1, the ends of which are hooked to formwork heads 2 fixed to the end of the prop 3 (FIG. 5 ). each formwork head 2 has a tubular part 4 provided with two pins 5 diametrically opposite (Figure 6) and two sliding elements one constitutes by a support 6 provided with fins 6 intended to penetrate into grooves 1a formed transversely under the ends of the primary beams 1, the other by a rotary bolt 7 intended to cooperate with the pins 5 to fix the support 6 in the high position. This shuttering head is not part of the present invention, it may explain how the formwork takes place as we will see later.
Deux profilés d'accrochage 8 (figures 3 et 4) font saillie latéralement de part et d'autre de la poutrelle primaire 1. La structure de poutrelles primaires qui vient d'être décrite est destinée à recevoir le panneau de coffrage 9 objet de la présente invention.Two attachment profiles 8 (Figures 3 and 4) protrude laterally on either side of the primary beam 1. The structure of primary beams which has just been described is intended to receive the formwork panel 9 object of the present invention.
La forme d'exécution de ce panneau donnée à titre d'exemple, mais dont les dimensions et les composants peuvent être modifiés en fonction des besoins, comporte essentiel¬ lement une structure sandwich comprenant deux couches externes formées d'un matériau composite 10 à base d'une résine vinylester choisie pour sa bonne résistance chimique en particulier vis-à-vis des constituants du béton et une bonne tenue en température. Sa mise en oeuvre est rapide et sa bonne fluidité permet d'assurer un bon mouillage des filaments de renfort incorporés à la résine.The embodiment of this panel given by way of example, but the dimensions and components of which can be modified as required, essentially comprises a sandwich structure comprising two external layers formed from a composite material 10 based of a vinylester resin chosen for its good chemical resistance, in particular with respect to the constituents of concrete and good temperature resistance. Its implementation is rapid and its good fluidity ensures good wetting of the reinforcing filaments incorporated in the resin.
On dispose entre les couches de matériau composite 10 des profilés métalliques 11 , dans cet exemple, des profilés tubulaires d'aluminium de section rectangulaire régulièrement espaces les uns des autres alternant avec un matériau mousse 12 qui, dans cet exemple, est une mousse de polyuréthane de 40 Kg/m3. Les profiles tubulaires 11 sont disposés de façon à s'étendre transversalement aux poutrelles primaires 1. Les profilés tubulaires 11 situés aux extrémités du panneau 9 présentent, dans le prolongement de leur face d'extrémité 11a deux rebords 11b faisant saillie respectivement sur les faces supérieures et inférieures. Ces rebords 11b ont une hauteur égale à l'épaisseur du composite 10 et sont destinés à protéger le bord du composite. Les faces du panneau 9 parallèles aux poutrelles 1, c'est-à-dire les facesThere are between the layers of composite material 10 metal profiles 11, in this example, tubular aluminum profiles of rectangular section regularly spaced from each other alternating with a foam material 12 which, in this example, is a polyurethane foam 40 Kg / m 3 . The tubular profiles 11 are arranged so as to extend transversely to the primary beams 1. The tubular profiles 11 located at the ends of the panel 9 have, in the extension of their end face 11a two flanges 11b projecting respectively from the upper faces and lower. These edges 11b have a height equal to the thickness of the composite 10 and are intended to protect the edge of the composite. The faces of the panel 9 parallel to the beams 1, that is to say the faces
FEUILLE DE REMPLACEMENT perpendiculaires aux profilés tubulaires 11, sont recouvertes d'une bande d'aluminium 13 qui peut être soudée aux extrémités des profilés tubulaires 11 et collée à la mouse entre ces tubes (figure 3).REPLACEMENT SHEET perpendicular to the tubular profiles 11, are covered with an aluminum strip 13 which can be welded to the ends of the tubular profiles 11 and glued to the mouse between these tubes (Figure 3).
La liaison entre le panneau 9 et les poutrelles primaires est obtenue en fixant sous le panneau aux endroits où se trouvent les extrémités des profilés tubulaires 11, des crochets 14 qui pénètrent dans le canal ménagé par les prof lés d'accrochage 8 qui fait saillie de part et d'autre de la poutrelle primaire 1. Ces crochets 14 peuvent, dans la variante illustrée par la figure 3, être collés à la couche de matériau composite 10 ou être vissés dans le profilé métallique 11.The connection between the panel 9 and the primary beams is obtained by fixing under the panel at the places where the ends of the tubular sections 11 are located, hooks 14 which penetrate into the channel formed by the attachment profiles 8 which projects from on either side of the primary beam 1. These hooks 14 can, in the variant illustrated in FIG. 3, be glued to the layer of composite material 10 or be screwed into the metal profile 11.
Dans la variante de la figure 4, la bande d'aluminium 13 est remplacée par un profilé aluminium 15 en forme de glissière sur lequel les crochets 16 sont montés coulissants. Cette variante a pour avantage de permettre d'utiliser successivement les deux faces de panneau. Lorsqu'une face est hors d'usage, on retourne les crochets 16 et le panneau 9 pour utiliser l'autre face ce qui double la durée de vie du panneau.In the variant of Figure 4, the aluminum strip 13 is replaced by an aluminum profile 15 in the form of a slide on which the hooks 16 are slidably mounted. This variant has the advantage of allowing successive use of the two panel faces. When one side is out of use, the hooks 16 and the panel 9 are turned over to use the other side, which doubles the life of the panel.
On place dans l'intervalle séparant deux panneaux 9 disposés de part et d'autre d'une poutrelle primaire.1, une bande 17 par exemple en contre-plaqué d'épaisseur convenable pour que sa face supérieure soit au niveau de celles des panneaux 9 adjacents. On peut aussi réaliser cette bande 17 en un matériau composite réut lisable.Is placed in the interval between two panels 9 arranged on either side of a primary beam. 1, a strip 17 for example of plywood of suitable thickness so that its upper face is at the level of those of the panels 9 adjacent. This strip 17 can also be produced from a readable composite material.
A titre d'exemple, on peut réaliser le panneau 9 à l'aide de feuilles de matériau composite de 1,2 mm d'épaisseur comprenant trois nappes de filaments de verre d'un module d'élasticité de 70000 MPa orientées l'une dans le sens longitudinal, les autres à 45* de part et d'autre de la direction longitudinale. Le module considéré suivant ces orientations est de 49500 MPa. Le module de la résine est de 3000 MPa et la proportion en volume de la résine est de 40 %. On peut considérer que le module effectif du composite est d'environ 24000 MPa. Avec des profilés tubulaires d'aluminium d'une section de 50 x 150 mm et 4 mm d'épaisseur de paroi, unBy way of example, the panel 9 can be produced using sheets of composite material 1.2 mm thick comprising three layers of glass filaments with a modulus of elasticity of 70,000 MPa oriented one in the longitudinal direction, the others at 45 * on either side of the longitudinal direction. The module considered according to these guidelines is 49,500 MPa. The resin modulus is 3000 MPa and the volume proportion of the resin is 40%. We can consider that the effective module of the composite is around 24000 MPa. With aluminum tubular profiles with a cross-section of 50 x 150 mm and 4 mm wall thickness, a
FEUÏLLE DE REMPLACEMENT écartement entre profilé de 0,215 m, un module de cisaillement de la mousse 12 disposée entre les profilés tubulaires 11 de 40 MPa et une charge uniformément répartie de 10,500 KPa, et une flèche des profilés tubulaires de 9,2501 x 10 ~5m, la flèche entre les profilés tubulaires 11 est de - 0,18 mm ce qui donne un rapport entre cette flèche et la distance de 0,215 m entre les profilés de 1/1194.REPLACEMENT SHEET distance between profiles of 0.215 m, a foam shearing module 12 arranged between the tubular profiles 11 of 40 MPa and a uniformly distributed load of 10,500 KPa, and a deflection of the tubular profiles of 9.2501 x 10 ~ 5 m, the arrow between the tubular sections 11 is - 0.18 mm which gives a ratio between this arrow and the distance of 0.215 m between the sections of 1/1194.
Cet exemple montre que le panneau selon l'exemple ci- dessus est largement di ensionné puisque la déflexion maximum admissible est de 1/400 de sorte que l'on peut choisir une mousse de densité plus faible et réduire également le poids du composite. Un panneau conforme à l'exemple susmentionné de 1,5 x 1,6 m représente un poids de l'ordre de 18 Kg qui, comme on l'a vu est susceptible d'être allégé. Si l'on compare le panneau de cet exemple à un panneau de bois traditionnel de même dimension, on obtient un allégement de 4 à 11 kg qui peut sans aucun doute être encore accru comme on a pu le constater.This example shows that the panel according to the example above is widely dimensioned since the maximum admissible deflection is 1/400 so that one can choose a foam of lower density and also reduce the weight of the composite. A panel according to the above example of 1.5 x 1.6 m represents a weight of the order of 18 Kg which, as we have seen, is capable of being lightened. If we compare the panel in this example to a traditional wooden panel of the same size, we obtain a reduction of 4 to 11 kg which can undoubtedly be further increased as we have seen.
Selon l'invention, le module d'élasticité de la matière en résine de chaque couche de matériau composite est au moins égal à 2500 MPa -notamment au moins égal à 3000 MPa-. Et la densité de la mousse 12 peut être comprise entre 20 et 150 kg/m3 -notamment entre 20 et 90 kg/m3-. Ces valeurs permettent de réaliser un panneau dont les caractéristiques mécaniques -notamment de rigidité- sont satisfaisantes dans les dimensions usuelles rencontrées et dont le poids est suffisamment faible pour être porté et monté par le dessous. De plus les raccords entre panneaux et entre chaque panneau et les bandes 17 permettent de réaliser des surfaces planes sans joint apparent. Et les panneaux peuvent être démontés rapidement, les étais et les poutrelles primaires étant maintenus en place jusqu'à la fin de la prise du séchage du béton de la dalle.According to the invention, the elastic modulus of the resin material of each layer of composite material is at least equal to 2500 MPa - in particular at least equal to 3000 MPa. And the density of the foam 12 can be between 20 and 150 kg / m 3 - in particular between 20 and 90 kg / m 3 -. These values make it possible to produce a panel whose mechanical characteristics, in particular rigidity, are satisfactory in the usual dimensions encountered and whose weight is low enough to be carried and mounted from below. In addition, the connections between panels and between each panel and the strips 17 make it possible to produce flat surfaces without visible joints. And the panels can be dismantled quickly, the stays and the primary beams being held in place until the curing of the concrete slab has cured.
L'invention concerne également un coffrage de dalle comprenant des rangées de poutrelles parallèles 1 reposant sur des étais par l'intermédiaire d'une tête coffrante susceptible d'occuper au moins deux positions verticales, caractérisé en ce qu'il comporte des panneaux de coffrage 9 selon l'invention destinés à être disposés entre et accrochés à chaque paire de poutrelles parallèles 1 en prolongement les unes des autres de façon à former une surface plane continue de coffrage. Selon l'invention, le coffrage est caractérisé en ce qu'il comporte une bande 17 placée au dessus de chaque poutrelle 1 et des têtes coffrantes 2 dans l'intervalle séparant deux panneaux 9 disposés de part et d'autre de la poutrelle et dont la face supérieure est au niveau de celles des panneaux 9. The invention also relates to a slab formwork comprising rows of parallel beams 1 resting on props by means of a formwork head capable of occupying at least two vertical positions, characterized in that it comprises formwork panels 9 according to the invention intended to be arranged between and hooked to each pair of parallel beams 1 in extension of each other so as to form a continuous planar formwork surface. According to the invention, the formwork is characterized in that it comprises a strip 17 placed above each beam 1 and formwork heads 2 in the interval separating two panels 9 arranged on either side of the beam and whose the upper face is at n i calf those panels 9.

Claims

REVENDICATIONS
1. Panneau de coffrage de dalle destiné à être disposé entre deux rangées de poutrelles parallèles reposant sur des étais par l'intermédiaire d'une tête coffrante susceptible d'occuper au moins deux positions verticales, caractérisé par le fait qu'il comporte une structure sandwich dont la partie médiane est recouverte par deux couches externes d'un matériau composite (10) comprenant une matrice en résine dont le module d'élasticité est au moins égal à 2500 MPa et dont les renforts sont constitués par au moins deux nappes de filaments parallèles dont le module d'élasticité est au moins égal à 60000 MPa orientées selon des directions différentes, la partie médiane comprenant des éléments de renfort (11) destinés à s'étendre transversalement aux rangées de poutrelles parallèles (l) et alternant avec un matériau mousse (12) d'une densité comprise entre 20 et 150 kg/m3.1. Slab formwork panel intended to be disposed between two rows of parallel beams resting on props by means of a formwork head capable of occupying at least two vertical positions, characterized in that it comprises a structure sandwich, the middle part of which is covered by two external layers of a composite material (10) comprising a resin matrix, the elastic modulus of which is at least equal to 2500 MPa and the reinforcements of which consist of at least two layers of filaments parallel whose elastic modulus is at least equal to 60,000 MPa oriented in different directions, the middle part comprising reinforcing elements (11) intended to extend transversely to the rows of parallel beams (l) and alternating with a material foam (12) with a density between 20 and 150 kg / m 3 .
2. Panneau selon la revendication 1 caractérisé en ce que le module d'élasticité de ladite matrice en résine est au moins égal à 3000 MPa.2. Panel according to claim 1 characterized in that the elastic modulus of said resin matrix is at least equal to 3000 MPa.
3. Panneau selon l'une des revendications l et 2 caractérisé en ce que la densité du matériau mousse (12) est comprise entre 20 et 90 kg/m3. 3. Panel according to one of claims l and 2 characterized in that the density of the foam material (12) is between 20 and 90 kg / m 3 .
4. Panneau selon l'une des revendications 1 à 3 caractérisé en ce que les extrémités desdits éléments de renfort (11) sont solidaires d'organes d'accrochage (14, 16) destinés à venir en prise avec des éléments d'accrochage (8) solidaires desdites poutrelles (1) . 4. Panel according to one of claims 1 to 3 characterized in that the ends of said reinforcing elements (11) are integral with fastening members (14, 16) intended to come into engagement with fastening elements ( 8) integral with said beams (1).
5. Panneau selon la revendication 4, caractérisé par le fait que les organes d'accrochage (14) sont fixés contre la face inférieure du panneau.5. Panel according to claim 4, characterized in that the hooking members (14) are fixed against the underside of the panel.
6. Panneau selon la revendication 4, caractérisé par le fait que des profilés (15) en forme de glissières sont fixés contre les faces de chant opposées du panneau auxquelles aboutissent lesdits éléments de renfort (11) , lesdits organes d'accrochage (16) étant montés coulissant le long de ces profilés (15) de manière à pouvoir être orientés selon deux directions opposées par rapport aux grandes faces du panneau afin de permettre d'utiliser successivement chacune de ces grandes faces comme face coffrante.6. Panel according to claim 4, characterized in that the profiles (15) in the form of slides are fixed against the opposite edge faces of the panel to which said reinforcing elements (11) terminate, said hooking members (16) being slidably mounted along these profiles (15) so as to be able to be oriented in two opposite directions with respect to to the large faces of the panel in order to allow each of these large faces to be used successively as a formwork face.
7. Panneau selon l'une des revendications l à 6, caractérisé par le fait que la face (lia) de chaque élément de renfort (11) formant une face de chant du panneau présente un rebord (11b) faisant saillie sur chaque grande face du panneau, la hauteur de ce rebord (11b) correspondant à l'épaisseur de la couche de matériau composite (10) .7. Panel according to one of claims l to 6, characterized in that the face (11a) of each reinforcing element (11) forming an edge face of the panel has a flange (11b) projecting from each large face of the panel, the height of this rim (11b) corresponding to the thickness of the layer of composite material (10).
8. Coffrage de dalle comprenant des rangées de poutrelles parallèles (1) reposant sur des étais par l'intermédiaire d'une tête coffrante susceptible d'occuper au moins deux positions verticales, caractérisé en ce qu'il comporte des panneaux de coffrage (9) selon l'une des revendications 1 à 7 destinés à être disposés et accrochés entre et accrochés à chaque paire de poutrelles parallèles8. Slab formwork comprising rows of parallel beams (1) resting on struts by means of a formwork head capable of occupying at least two vertical positions, characterized in that it comprises formwork panels (9 ) according to one of claims 1 to 7 intended to be arranged and hung between and hung on each pair of parallel beams
(1) en prolongement les uns des autres de façon à former une surface plane continue de coffrage. (1) in extension of each other so as to form a continuous flat formwork surface.
9. Coffrage selon la revendication 8 caractérisé en ce qu'il comporte une bande (17) placée au dessus de chaque poutrelle (1) et des têtes coffrantes (2) dans l'intervalle séparant deux panneaux (9) disposés de part et d'autre de la poutrelle (1) et dont la face supérieure est au niveau de celles des panneaux (9) . 9. Formwork according to claim 8 characterized in that it comprises a strip (17) placed above each beam (1) and shuttering heads (2) in the interval between two panels (9) arranged on the side and d 'other of the beam (1) and whose upper face is at the level of those of the panels (9).
EP19930900226 1991-11-07 1992-11-05 Slab formwork panel Withdrawn EP0571600A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9114042 1991-11-07
FR9114042A FR2683575B1 (en) 1991-11-07 1991-11-07 SLAB FORMWORK PANEL.

Publications (1)

Publication Number Publication Date
EP0571600A1 true EP0571600A1 (en) 1993-12-01

Family

ID=9418932

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19930900226 Withdrawn EP0571600A1 (en) 1991-11-07 1992-11-05 Slab formwork panel

Country Status (4)

Country Link
EP (1) EP0571600A1 (en)
CA (1) CA2099492A1 (en)
FR (1) FR2683575B1 (en)
WO (1) WO1993009312A1 (en)

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Publication number Priority date Publication date Assignee Title
GB2370603B (en) * 2000-10-07 2004-06-16 Odell Consultants Ltd Improvement in concrete shuttering platforms and support beams
ES2264296B1 (en) * 2003-05-26 2008-04-16 Sistemas Tecnicos De Encofrados, S.A. STRUCTURE FOR CONCRETE FLOORING OF CONCRETE FLOORS AND CORRESPONDING FORMWORK PROCEDURE.
ES2296430B1 (en) * 2004-09-16 2009-03-16 Eugenio Del Castillo Cabello RECOVERY WINDING SYSTEM.

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US3592435A (en) * 1968-09-09 1971-07-13 Mattingly Inc Form structure
GB1386966A (en) * 1971-04-28 1975-03-12 Kwikform Ltd Supporting structure for shuttering
BE792918A (en) * 1971-12-16 1973-04-16 Veba Chemie Ag PLASTIC CONCRETE FORMWORK PLATE
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Title
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Also Published As

Publication number Publication date
FR2683575B1 (en) 1994-01-21
CA2099492A1 (en) 1993-05-08
FR2683575A1 (en) 1993-05-14
WO1993009312A1 (en) 1993-05-13

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