EP2444567A1 - Formwork element for building a beam - Google Patents

Formwork element for building a beam Download PDF

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Publication number
EP2444567A1
EP2444567A1 EP11153695A EP11153695A EP2444567A1 EP 2444567 A1 EP2444567 A1 EP 2444567A1 EP 11153695 A EP11153695 A EP 11153695A EP 11153695 A EP11153695 A EP 11153695A EP 2444567 A1 EP2444567 A1 EP 2444567A1
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EP
European Patent Office
Prior art keywords
profile
formwork
shuttering
elements
sole
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EP11153695A
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German (de)
French (fr)
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EP2444567B1 (en
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Gérard Sekrane
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    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
    • E04C5/01—Reinforcing elements of metal, e.g. with non-structural coatings
    • E04C5/06—Reinforcing elements of metal, e.g. with non-structural coatings of high bending resistance, i.e. of essentially three-dimensional extent, e.g. lattice girders
    • E04C5/065—Light-weight girders, e.g. with precast parts
    • E04C5/0653—Light-weight girders, e.g. with precast parts with precast parts
    • E04C5/0656—Light-weight girders, e.g. with precast parts with precast parts with lost formwork
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C3/00—Structural elongated elements designed for load-supporting
    • E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
    • E04C3/20—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of concrete or other stone-like material, e.g. with reinforcements or tensioning members

Definitions

  • the invention relates to a formwork element for the construction of beams used, in particular, for floors manufactured through beams / interjoists or even balconies or loggia type constructions.
  • the heel is formed, in known manner, by a U-shaped sheet metal profile serving as a formwork in which the concrete is poured.
  • This profile is fixed permanently during the pouring of the concrete of the beam, the latter becoming self-supporting.
  • self-supporting beams are ISOLTOP® beams filled with polyurethane foam.
  • associates also called hourdis, which are pieces intended to rest on the beams, to be used for the formwork of the floor during the pouring of the concrete of paving of the floor.
  • floors including thermally insulating intervous obtained by cutting or molding a body of cellular insulating material, for example expanded polystyrene.
  • Euromac 2®-type interjoists can be mentioned.
  • a known structure thus provides for adding an insulating structure of Placoplatre type under the beams by means of fasteners adapted to ensure the fire resistance of the latter.
  • Another known work provides insulating interjoists protruding cantilever so as to cover the lower surface of adjacent beams to thermally insulate it.
  • the known floors do not have, sometimes, the thermal performance necessary for the fire resistance of buildings.
  • An object of the present invention is to overcome the aforementioned drawbacks.
  • Another object of the present invention is to provide beams providing effective thermal insulation while reducing the mass of the floor frame.
  • Another object of the present invention is to provide beams providing easy and fast construction and assembly.
  • Another object of the invention is to provide beams that can meet satisfactory thermal performance to be certified according to the new thermal standards of building construction.
  • a shuttering element for the construction of a reinforcement beam comprising a profile intended to be fixed to the reinforcement and to receive means for partially embedding said remarkable reinforcement in that said profile is formed of composite material to ensure the fire resistance of said beam.
  • the formwork element ensures the fire resistance of the beam and the entire floor has a continuous fire resistance, without thermal bridges.
  • the invention also relates to a remarkable beam in that it comprises at least one shuttering element as mentioned above and a metal or composite reinforcement intended to be fixed to said shuttering element.
  • the invention also relates to a building assembly comprising a beam as mentioned above and transverse reinforcement bars of composite material adapted for traversing the shuttering elements of said beam.
  • At least two formwork elements are configured to be installed on a wall base or a construction element and to support a beam through one or more recesses each adapted to receive a transverse reinforcing bar .
  • a skeleton of a floor consists of self-supporting beams parallel to each other, intended to be interconnected by filling elements such as slabs or interjoists.
  • a concrete pour for floor paving ensures the interlocking joints and beams.
  • a self-supporting beam comprises, in a conventional manner, a reinforcing metal reinforcement embedded in a heel formed of a suitable material whose contours are delimited by a formwork element remaining permanently after filling the beam with the material.
  • the heel is intended in particular to support interjoists located on either side of the beam.
  • beams include a prefabricated truss on the manufacturing table or manufactured on site or a prestressed beam.
  • the beam 10 comprises a structural element acting as formwork, designated by the general reference 100.
  • Such a shuttering element 100 comprises a profile 101, of U cross-section, having a flange 110 and two parallel lateral wings 150, disposed on either side of said flange 110.
  • the metal reinforcement 200 forming the web of the beam 100 is intended to be fixed on the soleplate 110 in the concavity of the profile 101.
  • This longitudinal reinforcement 200 conventionally comprises an upper bar 201 and two parallel lower bars 202, 203, each lower bar 202, 203 being secured to the upper bar 201 by a mesh 204.
  • This lattice 204 comprises a series of inclined bars, which form a triangulated assembly secured by welding with the upper bars 201 and lower 202,203 of the frame 200.
  • the bars of the lattice 204 may be arranged in a different manner depending on the triangulation system adopted.
  • the armature 200 is not metallic but formed of reinforcement bars of composite material.
  • reinforcing bars of the V-ROD composite reinforcing bar type from Pultrall (www.pultrall.com). These reinforcing bars may especially promote the fight against the corrosion of the frame 200.
  • metal frame 200 is also valid for a reinforcement of composite material.
  • a reinforcement 200 formed of metal reinforcing bars or composites 201, 202, 203, 204 and lattice comprising a system other than triangular.
  • Such a composite reinforcement is composed of a series of bars 204 perpendicular to the upper bar 201 and lower 202,203 of the frame 200 thus drawing a square or rectangular lattice.
  • the latter is provided with indexing means 120 of the reinforcement 200 on its inner face 111.
  • indexing means 120 are illustrated on the Figures 1 and 4 especially.
  • bosses 121 projecting from the inner face 111 of the soleplate 110, in the concavity of the profile 101, each boss 121 forming a longitudinal fixing groove for receiving a corresponding portion of a lower bar 202,203 of the frame 200 .
  • bosses 120 may be fixed or repositionable. In an exemplary embodiment of the present invention, four bosses 120 are distributed on the inner face 111 of the sole 110, to the right of the lower bars 202,203 of the frame 200.
  • the attachment groove of these bosses 120 is universal, namely that its shape and dimensions adapt to the shapes and dimensions of the rebar 200 that it receives.
  • the metal or composite reinforcement 200 is placed in a precise manner on the formwork element 100, before any partial embedding in a suitable material to form the final beam.
  • Such a material forming the heel of the beam 10 encasing the reinforcement 200 may be, without limitation, an insulating material such as reinforced concrete, thermal concrete, prestressed concrete, high-performance concrete or an insulating material. polyurethane foam type.
  • the heel of the beam 10 enclosing the frame 200 may comprise an insulating structure 320 honeycomb (NIDA or NIDAPLAST type) housed in the concavity of the profile 101.
  • This honeycomb structure 320 may or may not be subsequently embedded in concrete or covered with an insulating foam of polyurethane foam type or the like.
  • This honeycomb structure 320 may be formed, in a non-limiting example, of polypropylene material
  • the cells of the honeycomb structure 320 may be filled with a flexible insulating material, airgel type.
  • Nonlimiting examples of airgel include aerogels from Aspen aerogels (www.aerogel.com).
  • Such alternative embodiments reinforce the thermal insulation of the shuttering elements 100 according to the various embodiments of the present invention.
  • the profile 101 of the shuttering element 100 is formed of a composite material structure.
  • Such a composite material may be of the organic matrix, ceramic or metallic composite type.
  • the section 101 is formed of a composite material comprising an organic matrix associated with structural reinforcements formed of cut fibers and / or from recycling.
  • the section 101 is formed of a composite material comprising a polyester resin matrix filled with glass fibers.
  • such a section 101 is adapted to thermally isolate the beam and ensure its resistance to fire.
  • the thermal bridges of the beams 10 are eliminated during the production of a floor while offering formwork elements 100 of reduced mass.
  • profiles 101 meet the new standards and regulations on buildings, such as, for example, the BBC (Low Energy Building) and BEPOS (positive energy building) standards.
  • Non-limiting examples of materials for the profile 101 include the materials SMC 96 LP 13017 and SMC 75 LS 17000 from the company Menzolit® (www.menzolit.com), classified respectively, M1F1 and M1FO in the ranking. fire smoke.
  • Such formwork elements 100 of composite material are monoblock, namely that they are achievable by a single overall molding.
  • the indexing means 120, the connecting plates, the return fins or the mounting inserts described below can be integrally molded with the profile 101 of the formwork element 100.
  • the shuttering element 100 may be made of thin composite material, especially for shuttering elements that do not have mounting inserts.
  • a thickness of less than 2 mm may be mentioned.
  • the shuttering element 100 may further comprise a connection plate 300 integral with the soleplate 110 of the profile 101, projecting at one end thereof.
  • This connecting plate 300 is intended to allow the attachment of the beam 10 on a base of a wall, a sill or a cross beam during the production of a floor.
  • This connecting plate 300 may or may not include a mounting hole 310, of oblong shape, adapted to cooperate with complementary fastening elements integral walls, beams or aforementioned beams.
  • the plate 300 is intended to cooperate with a suitable bracket secured to a beam, via removable fastening means of threaded rods / bolts.
  • the fixing orifice 310 is thus intended to receive the threaded rod.
  • the plate is also made of composite material and molded with the profile 101.
  • the shuttering element 100 further comprises mounting inserts 140 and reservations 130 integrally molded with the profile 101 of the shuttering element 100.
  • the inserts 140 for mounting are adapted to receive screwing elements allowing the attachment of additional elements such as ceilings directly on the beam 10, without intermediate fasteners such as tongues screwed into the concrete beams to support said arrangements.
  • the reservations 130 may be used as a marker for the subsequent installation of mounting inserts or any other suitable mounting piece.
  • inserts 140 and reservations 130 are also zones of reinforcement of the section 101.
  • They can also be reinforced with a honeycomb structure.
  • Such inserts 140 and reservations 130 may have various embodiments.
  • Nonlimiting examples of embodiment are illustrated on the Figures 2 and 3 .
  • an insert 140 may be formed by a boss 141 projecting into the concavity of the profile 101, on the inner face 111 of the sole 110 of the profile 101.
  • Such a boss 141 may have, as illustrated on the figure 2 , a section of generally ⁇ -shaped, the concavity of ⁇ being directed outwardly of the section 101, forming an open fixing groove 142 adapted to receive a corresponding fastening element.
  • Such a boss 141 may also present, in a second embodiment illustrated in FIG. figure 3 a section of general shape in ⁇ right and be provided, on its side facing the sole 110 of the profile 101, a finger 143 projecting outside the section 101, perpendicular to the sole 110.
  • This finger 143 is shaped to cooperate with a complementary fastening element. Thus, in a non-limiting example, it may have a tapped central hole 144 for cooperating with a threaded fastener rod 1.
  • reservations 130 may comprise, themselves, mounting inserts 140 as mentioned above.
  • mounting inserts 140 may be associated with insert boosters 145 (illustrated in FIG. figure 6 ) having a function similar to that of the fixing groove 142 described above and allowing attachment, such as screwing into the thickness of the composite material of the profile 101.
  • the shuttering element 100 comprises, on the upper edges 151 of the lateral wings 150, one or more transverse return fins 160 extending parallel to the sole 110 and directed towards the inside of the profile 101.
  • these return fins 160 are located at one end of the lateral flanges 151 and, preferably, at their end opposite to the connecting plate 300.
  • This particular shape of the fins 160 offers the advantage of a simplified demoulding of the profile 101.
  • the return fins 160 are intended to provide a greater contact surface to the section 101 of the shuttering element 100, this to ensure a better bonding of the section 101 with the concrete of the pavement.
  • the return fins 160 serve as strapping for better holding the beam 10 after the section 101 filled.
  • a second embodiment provides return fins 160 that are uniform along the entire length of the lateral wings 150, forming a flat at the upper edge 151 of each lateral wing 150.
  • the shuttering element 100 can be adapted as needed.
  • brackets 20 may be dressed with airgel and honeycomb.
  • each end-formwork element 102 comprises, on the outer face 153 of the lateral wings 150 of the profile 101, snap-fastening means 154 or similar devices intended to cooperate with complementary fastening means provided on the brackets 20.
  • These complementary fixing means may be notches formed on the vertical edges of the brackets 20, facing the outer faces 153 of the lateral wings 150 of the section 101.
  • brackets 20 are also made of composite material.
  • each end formwork element 102 may be provided with a connection plate 300 previously described.
  • Each end-shuttering element 102 can also be made by placing, if necessary, reservations 130, mounting inserts 140 or return fins 160, before any molding of the profile 100.
  • the shuttering element 100 may be an intermediate spar 103 extending over all or part of the length of the beam 10, between two end shuttering elements 102.
  • Such an intermediate formwork element 103 may, in a manner similar to an end formwork element 102, include, if necessary, reservations 130, mounting inserts 140 or return fins 160.
  • the composite nature of the profiles 101 of the formwork elements 100, 102, 103 makes it possible to produce a single molding of the complex formwork parts, favoring a modular aspect of the formwork of the beam 10 that is simple to implement.
  • the formwork of the beam 10 may be formed of a series of formwork elements 100 similar or not, these formwork elements being adapted to the needs of realization of the beam 10.
  • a beam 10 may comprise an end formwork element 102, at each of its ends, as illustrated in FIG. figure 5 .
  • It may also comprise an end-shuttering element 102 at each of its ends, associated with a plurality of intermediate formwork elements 103, similar or not, distributed remotely or not along the beam 10, as illustrated. on the figure 6 .
  • the figure 7 illustrates a beam 10 comprising two end formwork elements 102 and an intermediate formwork element 103 extending between the two end formwork elements 102, continuously along the entire length of the beam 10.
  • any type of formwork elements 100 according to the invention and any combination thereof for the production of beams 10 is possible, without departing from the scope of the present invention.
  • the shuttering element 100 may be an end shuttering element 102 extending the entire length of the beam 10 from one end of the latter to another.
  • the intermediate formwork elements 103 may be different depending on their position on the beam 10.
  • the formwork elements 100 may themselves be formed by a cartonboard-type package 30 as formwork during filling of the beam 10 with a suitable material.
  • This packaging 30 facilitates the manufacture of long beams 10 or beams 10 on site and reduces their manufacturing costs.
  • the formwork of a beam 10 may consist of a plurality of similar or non-nested formwork elements 100.
  • One and / or the other of the ends of the two lateral wings 150 and the corresponding sole or ends of the soleplate 110 are shaped so that the shuttering element 100 can fit with an adjacent shuttering element 100 when they are in contact.
  • one and / or the other of the ends of the two lateral wings 150 of a profile 101 may comprise, depending on the position of the profile 101 along the beam and adjacent formwork elements, a recess 152 vertical.
  • This recess 152 is able to come into contact with a recess 152 of complementary shape present at the corresponding ends of each lateral flange 150 of the profile 101 of the adjacent shuttering element 100.
  • the shape and dimensions of the recess 152 of a shuttering element 100 are adapted so that the recess 152 engages with the recess 152 of the shuttering element 100 juxtaposed.
  • the vertical edge of the recess 152 of a shuttering element 100 forms a stop at the vertical edge of the recess 152 of the shuttering element 100 juxtaposed, when arranged edge to edge.
  • Such a recess 152 vertical, of right Z section, can be provided on the upper edge or the lower edge of the lateral wings 150, this being a function of the adjacent formwork elements 100 with which it is intended to fit, as is illustrated on the figure 10 .
  • This rabbet 112 is adapted to be fixed with suitable means on a complementary bearing surface provided on the adjacent formwork element 100. These means may be gluing means, for example.
  • the support rebates 112 form pre-cut zones, offering the advantage of being able to shorten the formwork of a beam that is too long by precasting the excess formwork elements or to be able to lengthen the length of the beam formwork, by interlocking new formwork elements 100 depending on the desired length of the latter.
  • the formwork elements 100 according to the invention are thus adaptable according to the specific needs of the site.
  • Such beams 10 and the associated formwork elements 100 are illustrated in FIGS. Figures 12, 13 and 14 .
  • the beams 10 may in particular be placed between the floor 1 of the floor and the floor 2 of the balcony.
  • the shuttering elements 100 may further comprise, on their lateral walls 150, through orifices 301 adapted to receive transverse reinforcing rods 300 adapted to pass through the shuttering element on either side. 100 corresponding.
  • transverse reinforcement bars 300 are intended to form strands for the beam 10 according to the invention, and thus resume the forces exerted on the beam 10 and the corresponding formwork elements 100.
  • they are preferably made of composite material, in order to promote a high thermal insulation of the constructions.
  • Such beams 10 may be self-supporting or simply placed on the floor 1.
  • the reinforcing bars 300 are, moreover, embedded in the floor 1 and the floor 2 of the balcony.
  • Such beams 10 may be self-supporting or simply placed on the floor 1.
  • At least two end-to-end shuttering elements 100 can be configured to be installed on a wall screed 400 or a construction element, such as a concrete block, and to support a beam 10, as illustrated in FIG. figure 11 .
  • a platinum or transverse reinforcement bar 300 may be configured to be connected to a recess 152 of a formwork element.
  • Each shuttering element 100 may have side walls of different heights.
  • Such an embodiment makes it possible to cast a compression table at the same time as a belt.

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  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Forms Removed On Construction Sites Or Auxiliary Members Thereof (AREA)

Abstract

The formwork element (100) has a section (101) fixed with a metal reinforcement (200) and receiving units for partially drowning the metal reinforcement. The section is made of composite material to ensure resistance against fire of a self-supporting girder (10). A connection plate (300) is molded with the section, and fixes the formwork element with a wall element. The connection plate is made of composite material. Two side wings (150) are arranged on both sides of a sole (110). The metal reinforcement is made of series of metal bars. An independent claim is also included for a self-supporting girder, comprising a metal reinforcement.

Description

L'invention concerne un élement de coffrage pour la construction de poutrelles utilisées, notamment, pour des planchers fabriqués grâce à des ensembles poutrelles/entrevous ou encore des constructions de type balcons ou loggia.The invention relates to a formwork element for the construction of beams used, in particular, for floors manufactured through beams / interjoists or even balconies or loggia type constructions.

De façon classique, pour réaliser un plancher, on utilise des poutrelles préfabriquées en béton armé ou en béton précontraint comprenant un talon de béton dans lequel est partiellement noyé une armature métallique.Conventionally, to achieve a floor, using prefabricated beams of reinforced concrete or prestressed concrete comprising a concrete heel in which is partially embedded a metal frame.

Le talon est formé, de façon connue, par un profilé en tôle pliée en U faisant office de coffrage dans lequel on coule le béton.The heel is formed, in known manner, by a U-shaped sheet metal profile serving as a formwork in which the concrete is poured.

Ce profilé est fixé à demeure lors de la coulée du béton de la poutrelle, cette dernière devenant autoporteuse.This profile is fixed permanently during the pouring of the concrete of the beam, the latter becoming self-supporting.

On peut citer, comme exemple de poutrelles autoporteuses, les poutrelles ISOLTOP®, remplies de mousse polyuréthane.Examples of self-supporting beams are ISOLTOP® beams filled with polyurethane foam.

A ces poutrelles, on associe des entrevous, encore appelés hourdis, qui sont des pièces destinées à reposer sur les poutrelles, pour servir au coffrage du plancher lors de la coulée du béton de dallage du plancher.To these joists, associates, also called hourdis, are added, which are pieces intended to rest on the beams, to be used for the formwork of the floor during the pouring of the concrete of paving of the floor.

Un aspect important de ces planchers est leur isolation thermique et leur tenue au feu.An important aspect of these floors is their thermal insulation and their fire resistance.

On a ainsi proposé des planchers comprenant des entrevous isolants thermiquement obtenus par découpe ou moulage d'un corps en matière isolante alvéolaire, par exemple en polystyrène expansé.It has thus been proposed floors including thermally insulating intervous obtained by cutting or molding a body of cellular insulating material, for example expanded polystyrene.

On peut citer, par exemple, les entrevous de type Euromac 2®.For example, Euromac 2®-type interjoists can be mentioned.

Or, on constate que la tenue au feu du plancher est interrompue au droit des poutrelles. Les ponts thermiques ainsi formés par les poutrelles sont néfastes à l'isolation thermique du plancher.However, it is found that the fire resistance of the floor is interrupted to the right of the beams. The thermal bridges thus formed by the beams are harmful to the thermal insulation of the floor.

On a également proposé de rapporter des surfaces isolantes sous le plancher et, notamment, sous les profilés des poutrelles.It has also been proposed to report insulating surfaces under the floor and, in particular, under the profiles of the beams.

Un ouvrage connu prévoit, ainsi, de rajouter une structure isolante de type Placoplatre sous les poutrelles grâce à des pièces de fixation adaptées pour assurer la tenue au feu de ces dernières.A known structure thus provides for adding an insulating structure of Placoplatre type under the beams by means of fasteners adapted to ensure the fire resistance of the latter.

Or, ces pièces sont susceptibles d'être affectées par la corrosion.However, these parts are likely to be affected by corrosion.

Par ailleurs, l'ajout de structures isolantes alourdit les poutrelles. De plus, leur montage devient laborieux et complexe.In addition, the addition of insulating structures weighs the beams. Moreover, their editing becomes laborious and complex.

Un autre ouvrage connu prévoit des entrevous isolants dépassant en porte à faux de façon à recouvrir la surface inférieure des poutrelles adjacentes pour l'isoler thermiquement.Another known work provides insulating interjoists protruding cantilever so as to cover the lower surface of adjacent beams to thermally insulate it.

Or, de tels entrevous ne permettent pas de supprimer les ponts thermiques aux extrémités des poutrelles.However, such interjoists do not remove the thermal bridges at the ends of the beams.

De plus, leur montage est laborieux.Moreover, their assembly is laborious.

Par ailleurs, les planchers connus ne possèdent, parfois, pas les performances thermiques nécessaires pour la tenue au feu des bâtiments.Furthermore, the known floors do not have, sometimes, the thermal performance necessary for the fire resistance of buildings.

En effet, compte tenu des nouvelles normes et réglementation concernant la tenue au feu des bâtiments, nombre de planchers dits isolés thermiquement connus ne répondent plus aux spécifications requises pour pouvoir être certifiés par les organismes agréés.Indeed, given the new standards and regulations regarding the fire resistance of buildings, many so-called thermally insulated floors known no longer meet the specifications required to be certified by accredited bodies.

Un but de la présente invention est de remédier aux inconvénients précités.An object of the present invention is to overcome the aforementioned drawbacks.

Il est ainsi désirable de proposer des poutrelles présentant une protection thermique telle que l'isolation thermique continue d'un plancher est assurée.It is thus desirable to provide beams with thermal protection such that the continuous thermal insulation of a floor is ensured.

Un autre but de la présente invention est de proposer des poutrelles offrant une isolation thermique efficace tout en réduisant la masse de l'ossature du plancher.Another object of the present invention is to provide beams providing effective thermal insulation while reducing the mass of the floor frame.

Il est également désirable d'offrir des poutrelles pouvant être adaptables aux besoins des chantiers sur lesquels elles sont utilisées tout en étant facilement reproductibles.It is also desirable to offer beams that can be adapted to the needs of the sites on which they are used while being easily reproducible.

Un autre but de la présente invention est de proposer des poutrelles offrant une réalisation et un montage faciles et rapides.Another object of the present invention is to provide beams providing easy and fast construction and assembly.

Un autre but de l'invention est de proposer des poutrelles pouvant répondre de performances thermiques satisfaisantes pour pouvoir être certifiées selon les nouvelles normes thermiques de la construction de bâtiments.Another object of the invention is to provide beams that can meet satisfactory thermal performance to be certified according to the new thermal standards of building construction.

A cet effet, on prévoit, selon l'invention, un élément de coffrage pour la construction d'une poutrelle à armature comprenant un profilé destiné à se fixer à l'armature et à recevoir des moyens pour noyer partiellement ladite armature remarquable en ce que ledit profilé est formé en matériau composite pour assurer la tenue au feu de ladite poutrelle.For this purpose, according to the invention, there is provided a shuttering element for the construction of a reinforcement beam comprising a profile intended to be fixed to the reinforcement and to receive means for partially embedding said remarkable reinforcement in that said profile is formed of composite material to ensure the fire resistance of said beam.

Grâce à la présente invention, l'élement de coffrage assure la tenue au feu de la poutrelle et l'ensemble du plancher présente une tenue au feu continu, sans ponts thermiques.Thanks to the present invention, the formwork element ensures the fire resistance of the beam and the entire floor has a continuous fire resistance, without thermal bridges.

Selon des modes particuliers de réalisation de l'invention, l'élément de coffrage selon l'invention peut comprendre une ou plusieurs des caractéristiques suivantes, prises isolément ou en combinaison techniquement possibles :

  • l'élément de coffrage comprend, en outre, une platine de liaison venue de moulage avec le profilé, ladite platine étant destinée à fixer l'élément de coffrage à un élément de mur adapté ;
  • la platine de liaison est en matériau composite ;
  • le profilé comprenant une semelle et deux ailes latérales de part et d'autre de ladite semelle, la semelle est conformée de sorte de comprendre au moins un insert de montage ;
  • l'insert de montage est un bossage faisant saillie de la semelle dans la concavité du profilé, ledit bossage comprenant une gorge de fixation d'éléments de fixation complémentaires ou un doigt de fixation d'éléments de fixation complémentaires faisant saillie à l'extérieur du profilé ;
  • le profilé comprend des moyens d'indexage de ladite armature ;
  • l'armature étant formée d'une série de barres en matériau métallique ou composite, les moyens d'indexage sont adaptés pour indexer lesdites barres de dimensions et de forme différentes ;
  • le profilé comprend des ailettes de retour transversales s'étendant des ailes latérales vers l'intérieur du profilé ;
  • l'une et/ou l'autre des extrémités des ailes latérales sont conformées de sorte que l'élément de coffrage peut s'emboîter avec un élément de coffrage adjacent, lesdites extrémités des ailes latérales comprennent, chacune, un décrochement apte à s'emboîter un décrochement de forme complémentaire présent à une extrémité correspondante d'une aile latérale d'un élément de coffrage adjacent ;
  • la semelle du profilé comprend au moins une feuillure d'appui propre à se fixer sur une surface d'appui complémentaire prévue sur un élément de coffrage adjacent de sorte que l'élément de coffrage peut s'emboîter avec un élément de coffrage adjacent ;
  • les ailes latérales du profilé comprennent des moyens de fixation aptes à coopérer avec des moyens de fixation complémentaires ménagés sur des équerres destinées à supporter des entrevous.
According to particular embodiments of the invention, the formwork element according to the invention may comprise one or more of the following characteristics, taken in isolation or in combination technically possible:
  • the formwork element further comprises a connecting plate integrally molded with the profile, said plate being intended to fix the formwork element to a suitable wall element;
  • the connecting plate is made of composite material;
  • the profile comprising a sole and two lateral wings on either side of said sole, the sole is shaped so as to include at least one mounting insert;
  • the mounting insert is a boss protruding from the sole in the concavity of the profile, said boss comprising a securing groove of complementary fastening elements or a fastening finger complementary fastening elements projecting outside the shaped;
  • the profile comprises means for indexing said armature;
  • the armature being formed of a series of bars of metal or composite material, the indexing means are adapted to index said bars of different dimensions and shape;
  • the profile comprises transverse return fins extending from the lateral wings towards the inside of the profile;
  • one and / or the other of the ends of the lateral flanges are shaped so that the shuttering element can fit with an adjacent shuttering element, said ends of the lateral flanges each comprise a recess capable of fitting a recess of complementary shape present at a corresponding end of a side wing of an adjacent formwork element;
  • the sole of the profile comprises at least one support rebate adapted to be fixed on a complementary support surface provided on an adjacent formwork element so that the formwork element can fit with an adjacent formwork element;
  • the lateral wings of the profile comprise fixing means adapted to cooperate with complementary fastening means formed on brackets intended to support interjoists.

L'invention concerne, également, une poutrelle remarquable en ce qu'elle comprend au moins un élément de coffrage tel que précité et une armature métallique ou composite destinée à être fixée audit élément de coffrage.The invention also relates to a remarkable beam in that it comprises at least one shuttering element as mentioned above and a metal or composite reinforcement intended to be fixed to said shuttering element.

Selon des modes particuliers de réalisation de l'invention, la poutrelle selon l'invention peut comprendre une ou plusieurs des caractéristiques suivantes, prises isolément ou en combinaison techniquement possibles :

  • la poutrelle comprend, en outre, un talon comprenant une structure en nid d'abeille ;
  • la poutrelle comprend un coffrage modulaire formé d'une série d'éléments de coffrage similaires ou non, ces éléments de coffrage étant emboîtés ou répartis le long de l'armature.
According to particular embodiments of the invention, the beam according to the invention may comprise one or more of the following characteristics, taken in isolation or in combination technically possible:
  • the beam further comprises a heel comprising a honeycomb structure;
  • the beam comprises a modular formwork formed of a series of similar formwork elements or not, these formwork elements being nested or distributed along the frame.

L'invention concerne également un ensemble de construction comprenant une poutrelle telle que précitée et des barres de renforcement transversales en matériau composite adaptées pour traversées les éléments de coffrage de la dite poutrelle.The invention also relates to a building assembly comprising a beam as mentioned above and transverse reinforcement bars of composite material adapted for traversing the shuttering elements of said beam.

Préférentiellement, au moins deux éléments de coffrage sont configurés pour être installés sur une arase de mur ou un élément de construction et servir de support à une poutrelle par l'intermédiaire d'un ou de plusieurs décrochements aptes à recevoir chacun une barre de renforcement transversale.Preferably, at least two formwork elements are configured to be installed on a wall base or a construction element and to support a beam through one or more recesses each adapted to receive a transverse reinforcing bar .

D'autres aspects, buts et avantages de l'invention apparaîtront à la lecture de la description détaillée suivante de formes de réalisation préférées de celle-ci, données à titre d'exemples non limitatifs et faites en référence aux dessins annexés sur lesquels :

  • la figure 1 représente une vue en perspective d'une poutrelle comprenant un élément de coffrage selon un premier mode de réalisation de la présente invention ;
  • les figures 2 et 3 représentent deux modes de réalisation d'inserts de montage ménagés dans l'élément de coffrage de la figure 1 ;
  • la figure 4 représente une vue en perspective de moyens d'indexage d'une armature métallique sur l'élément de coffrage de la figure 1 ;
  • les figures 5 à 8 représentent, chacune, un mode de réalisation d'une poutrelle à partir d'éléments de coffrage modulaires selon la présente invention ;
  • les figures 9 et 10 représentent, respectivement, des vues en perspective et en coupe d'un mode de réalisation d'un coffrage de poutrelle modulaire formé d'une pluralité d'éléments de coffrage selon la présente invention emboîtés ;
  • la figure 11 illustre une vue en coupe d'un élément de coffrage selon un second mode de réalisation de la présente invention ;
  • la figure 12 illustre une vue en perspective d'un élément de coffrage selon un troisième mode de réalisation de la présente invention ;
  • les figures 13 et 14 illustrent respectivement une vue en perspective et en coupe d'un mode de réalisation d'un coffrage de poutrelle modulaire formé d'une pluralité d'éléments de coffrage de la figure 12 emboîtés, ledit coffrage étant destiné à la construction d'un balcon ou loggia.
  • La figure 15 illustre une vue en perspective de deux éléments de coffrage selon un autre mode de réalisation de la présente invention.
Other aspects, objects and advantages of the invention will appear on reading the following detailed description of preferred embodiments thereof, given by way of nonlimiting examples and with reference to the appended drawings in which:
  • the figure 1 is a perspective view of a beam comprising a formwork element according to a first embodiment of the present invention;
  • the Figures 2 and 3 represent two embodiments of mounting inserts provided in the formwork element of the figure 1 ;
  • the figure 4 represents a perspective view of indexing means of a metal reinforcement on the formwork element of the figure 1 ;
  • the Figures 5 to 8 each represent an embodiment of a beam from modular formwork elements according to the present invention;
  • the Figures 9 and 10 represent, respectively, perspective and sectional views of an embodiment of a beam formwork modular formed of a plurality of shuttering elements according to the present invention nested;
  • the figure 11 illustrates a sectional view of a formwork element according to a second embodiment of the present invention;
  • the figure 12 illustrates a perspective view of a formwork element according to a third embodiment of the present invention;
  • the figures 13 and 14 respectively illustrate a perspective view in section of an embodiment of a modular beam formwork formed of a plurality of formwork elements of the figure 12 nested, said formwork being intended for the construction of a balcony or loggia.
  • The figure 15 illustrates a perspective view of two formwork elements according to another embodiment of the present invention.

Une ossature d'un plancher est constituée de poutrelles autoporteuses parallèles les unes aux autres, destinées à être reliées entre elles par des éléments de remplissage tels que des hourdis ou des entrevous.A skeleton of a floor consists of self-supporting beams parallel to each other, intended to be interconnected by filling elements such as slabs or interjoists.

Lors de la réalisation du plancher, une coulée de béton pour le dallage du plancher assure la solidarisation des entrevous et des poutrelles.During the construction of the floor, a concrete pour for floor paving ensures the interlocking joints and beams.

Une poutrelle autoporteuse comprend, de façon classique, une armature métallique de renforcement noyée dans un talon formé d'un matériau adapté dont les contours sont délimités par un élément de coffrage restant à demeure après remplissage de la poutrelle avec le matériau.A self-supporting beam comprises, in a conventional manner, a reinforcing metal reinforcement embedded in a heel formed of a suitable material whose contours are delimited by a formwork element remaining permanently after filling the beam with the material.

Le talon est notamment destiné à servir d'appui aux entrevous situés de part et d'autre de la poutrelle.The heel is intended in particular to support interjoists located on either side of the beam.

Une telle poutrelle non remplie est illustrée sur la figure 1 et désignée par la référence générale 10.Such an unfilled beam is illustrated on the figure 1 and designated by the general reference 10.

On peut citer, comme exemples de poutrelle, une poutrelle préfabriquée sur table de fabrication ou fabriquée sur chantier ou encore une poutrelle précontrainte.Examples of beams include a prefabricated truss on the manufacturing table or manufactured on site or a prestressed beam.

Sur la figure 1, la poutrelle 10 comprend un élément structural faisant office de coffrage, désigné par la référence générale 100.On the figure 1 , the beam 10 comprises a structural element acting as formwork, designated by the general reference 100.

Un tel élément de coffrage 100 comprend un profilé 101, de section transversale en U, présentant une semelle 110 et deux ailes 150 latérales parallèles, disposées de part et d'autre de ladite semelle 110.Such a shuttering element 100 comprises a profile 101, of U cross-section, having a flange 110 and two parallel lateral wings 150, disposed on either side of said flange 110.

L'armature métallique 200 formant l'âme de la poutrelle 100 est destinée à être fixée sur la semelle 110, dans la concavité du profilé 101.The metal reinforcement 200 forming the web of the beam 100 is intended to be fixed on the soleplate 110 in the concavity of the profile 101.

Cette armature 200 longitudinale, de section transversale en forme de V retourné, comprend de façon classique une barre supérieure 201 et deux barres inférieures 202,203 parallèles, chaque barre inférieure 202,203 étant solidarisée à la barre supérieure 201 par un treillis 204.This longitudinal reinforcement 200, of inverted V-shaped cross-section, conventionally comprises an upper bar 201 and two parallel lower bars 202, 203, each lower bar 202, 203 being secured to the upper bar 201 by a mesh 204.

Ce treillis 204 comprend une série de barres inclinées, qui forment un ensemble triangulé solidarisé par soudage avec les barres supérieure 201 et inférieures 202,203 de l'armature 200.This lattice 204 comprises a series of inclined bars, which form a triangulated assembly secured by welding with the upper bars 201 and lower 202,203 of the frame 200.

Les barres du treillis 204 peuvent être disposées d'une façon différente suivant le système de triangulation adopté.The bars of the lattice 204 may be arranged in a different manner depending on the triangulation system adopted.

Dans une variante de réalisation illustrée notamment sur la figure 11, l'armature 200 n'est pas métallique mais formée de barres de renforcement en matériau composite.In an embodiment variant illustrated in particular on the figure 11 , the armature 200 is not metallic but formed of reinforcement bars of composite material.

Dans un exemple non limitatif de la présente invention, on peut citer les barres de renforcement de type barres de renforcement en composite V-ROD de la société Pultrall (www.pultrall.com). Ces barres de renforcement peuvent notamment favoriser la lutte contre la corrosion de l'armature 200.In a non-limiting example of the present invention, mention may be made of reinforcing bars of the V-ROD composite reinforcing bar type from Pultrall (www.pultrall.com). These reinforcing bars may especially promote the fight against the corrosion of the frame 200.

Il est à noter que la description qui vient d'être faite pour l'armature métallique 200 est également valable pour une armature en matériau composite.It should be noted that the description that has just been made for the metal frame 200 is also valid for a reinforcement of composite material.

Par ailleurs, dans une variante de réalisation, on peut également prévoir une armature 200 formée de barres de renforcement métalliques ou composites 201, 202, 203, 204 et treillis comprenant un système autre que triangulaire.Furthermore, in an alternative embodiment, it is also possible to provide a reinforcement 200 formed of metal reinforcing bars or composites 201, 202, 203, 204 and lattice comprising a system other than triangular.

Une telle armature composite, illustrée sur la figure 12 notamment, est composée d'une série de barres 204 perpendiculaires aux barres supérieure 201 et inférieures 202,203 de l'armature 200 dessinant ainsi un treillis carré ou rectangulaire.Such a composite reinforcement, illustrated on the figure 12 in particular, is composed of a series of bars 204 perpendicular to the upper bar 201 and lower 202,203 of the frame 200 thus drawing a square or rectangular lattice.

Afin de fixer l'armature 200 sur l'élément de coffrage 100 et, plus précisément, sur la semelle 110, cette dernière est pourvue de moyens d'indexage 120 de l'armature 200 sur sa face intérieure 111.In order to fix the reinforcement 200 on the shuttering element 100 and, more precisely, on the soleplate 110, the latter is provided with indexing means 120 of the reinforcement 200 on its inner face 111.

Ces moyens d'indexage 120 sont illustrés sur les figures 1 et 4 notamment.These indexing means 120 are illustrated on the Figures 1 and 4 especially.

Ils comprennent des bossages 121 en saillie de la face intérieure 111 de la semelle 110, dans la concavité du profilé 101, chaque bossage 121 formant une gorge longitudinale de fixation destinée à recevoir une partie correspondante d'une barre inférieure 202,203 de l'armature 200.They include bosses 121 projecting from the inner face 111 of the soleplate 110, in the concavity of the profile 101, each boss 121 forming a longitudinal fixing groove for receiving a corresponding portion of a lower bar 202,203 of the frame 200 .

Ces bossages 120 peuvent être fixes ou repositionnables. Dans un exemple de réalisation de la présente invention, quatre bossages 120 sont répartis sur la face intérieure 111 de la semelle 110, au droit des barres inférieures 202,203 de l'armature 200.These bosses 120 may be fixed or repositionable. In an exemplary embodiment of the present invention, four bosses 120 are distributed on the inner face 111 of the sole 110, to the right of the lower bars 202,203 of the frame 200.

De préférence, la gorge de fixation de ces bossages 120 est universelle, à savoir que sa forme et ses dimensions s'adaptent aux formes et aux dimensions des barres d'armature 200 qu'elle reçoit.Preferably, the attachment groove of these bosses 120 is universal, namely that its shape and dimensions adapt to the shapes and dimensions of the rebar 200 that it receives.

De cette façon l'armature 200 métallique ou composite est mise en place de façon précise sur l'élément de coffrage 100, avant tout noyage partiel dans un matériau adapté afin de former la poutrelle 10 définitive.In this way the metal or composite reinforcement 200 is placed in a precise manner on the formwork element 100, before any partial embedding in a suitable material to form the final beam.

Un tel matériau formant le talon de la poutrelle 10 enrobant l'armature 200 peut être, de façon non limitative, un matériau isolant tel que du béton armé, du béton thermique, du béton précontraint, du béton haute performance ou encore un matériau isolant de type mousse en polyuréthane.Such a material forming the heel of the beam 10 encasing the reinforcement 200 may be, without limitation, an insulating material such as reinforced concrete, thermal concrete, prestressed concrete, high-performance concrete or an insulating material. polyurethane foam type.

Dans une variante de réalisation illustrée sur la figure 11, le talon de la poutrelle 10 enrobant l'armature 200 peut comprendre une structure isolante 320 en nid d'abeille (de type NIDA ou NIDAPLAST) logée dans la concavité du profilé 101.In an embodiment variant illustrated on the figure 11 , the heel of the beam 10 enclosing the frame 200 may comprise an insulating structure 320 honeycomb (NIDA or NIDAPLAST type) housed in the concavity of the profile 101.

Cette structure en nid d'abeille 320 peut être ou non, par la suite, noyée dans du béton ou recouverte d'une mousse isolante de type mousse de polyuréthane ou autre.This honeycomb structure 320 may or may not be subsequently embedded in concrete or covered with an insulating foam of polyurethane foam type or the like.

Cette structure en nid d'abeille 320 peut être formée, dans un exemple non limitatif, en matériau polypropylèneThis honeycomb structure 320 may be formed, in a non-limiting example, of polypropylene material

Dans une autre variante de réalisation, les alvéoles de la structure en nid d'abeille 320 peuvent être remplies d'un matériau isolant flexible, de type aérogel.In another alternative embodiment, the cells of the honeycomb structure 320 may be filled with a flexible insulating material, airgel type.

On peut également prévoir de déposer un film d'aérogel 310 sur les faces internes des parois 150, de la semelle 110 et des retours 160 du profilé 101 avant de déposer une structure en nid d'abeille dans la concavité dudit profilé 101. Un tel film d'aérogel 310 est observé sur les figures 11 et 12 notamment.It is also possible to deposit an airgel film 310 on the inner faces of the walls 150, the sole 110 and the returns 160 of the profile 101 before depositing a honeycomb structure in the concavity of said profile 101. Such a airgel film 310 is observed on the Figures 11 and 12 especially.

On peut citer comme exemples non limitatifs d'aérogel, les aérogels de la société Aspen aérogels (www.aerogel.com).Nonlimiting examples of airgel include aerogels from Aspen aerogels (www.aerogel.com).

De telles variantes de réalisation renforcent l'isolation thermique des éléments de coffrage 100 selon les différents modes de réalisation de la présente invention.Such alternative embodiments reinforce the thermal insulation of the shuttering elements 100 according to the various embodiments of the present invention.

Selon l'invention, le profilé 101 de l'élément de coffrage 100 est formé d'une structure en matériau composite.According to the invention, the profile 101 of the shuttering element 100 is formed of a composite material structure.

Un tel matériau composite peut être de type composite à matrice organique, céramique ou métallique.Such a composite material may be of the organic matrix, ceramic or metallic composite type.

Dans une variante de réalisation, le profilé 101 est formé d'un matériau composite comprenant une matrice organique associée à des renforts structurels formés de fibres coupées et/ ou issues du recyclage.In an alternative embodiment, the section 101 is formed of a composite material comprising an organic matrix associated with structural reinforcements formed of cut fibers and / or from recycling.

Dans une autre variante de réalisation, le profilé 101 est formé d'un matériau composite comprenant une matrice de résine polyester chargée de fibres de verre.In another alternative embodiment, the section 101 is formed of a composite material comprising a polyester resin matrix filled with glass fibers.

Ainsi, un tel profilé 101 est adapté pour isoler thermiquement la poutrelle et assurer sa tenue au feu.Thus, such a section 101 is adapted to thermally isolate the beam and ensure its resistance to fire.

Avec de tels profilés en matériau composite, on supprime les ponts thermiques des poutrelles 10 lors de la réalisation d'un plancher tout en offrant des éléments de coffrage 100 de masse réduite.With such profiles of composite material, the thermal bridges of the beams 10 are eliminated during the production of a floor while offering formwork elements 100 of reduced mass.

De plus, de tels profilés 101 permettent de répondre aux nouvelles normes et réglementation concernant les bâtiments, comme par exemple, les normes BBC (Bâtiment basse consommation) et BEPOS (bâtiment à énergie positive).In addition, such profiles 101 meet the new standards and regulations on buildings, such as, for example, the BBC (Low Energy Building) and BEPOS (positive energy building) standards.

On peut citer, ainsi, comme exemples non limitatifs de matériaux pour le profilé 101, les matériaux SMC 96 LP 13017 et SMC 75 LS 17000 de la société Menzolit® (www.menzolit.com), classés respectivement, M1F1 et M1FO dans le classement feu-fumée.Non-limiting examples of materials for the profile 101 include the materials SMC 96 LP 13017 and SMC 75 LS 17000 from the company Menzolit® (www.menzolit.com), classified respectively, M1F1 and M1FO in the ranking. fire smoke.

Par ailleurs, de tels éléments de coffrage 100 en matériau composite sont monoblocs, à savoir qu'ils sont réalisables par un moulage global unique.Furthermore, such formwork elements 100 of composite material are monoblock, namely that they are achievable by a single overall molding.

Ainsi, les moyens d'indexage 120, les platines de liaison, les ailettes de retour ou encore les inserts de montage décrits plus loin peuvent être venus de moulage avec le profilé 101 de l'élément de coffrage 100.Thus, the indexing means 120, the connecting plates, the return fins or the mounting inserts described below can be integrally molded with the profile 101 of the formwork element 100.

Ceci contribue à une simplicité de mise en oeuvre des profilés 101 dans la réalisation des poutrelles 10 autoporteuses et de planchers associés.This contributes to simplicity of implementation of the profiles 101 in the production of self-supporting beams 10 and associated floors.

Par ailleurs, de part leur nature composite, l'aspect modulaire des éléments de coffrage 100 est favorisé, comme on le verra, plus précisément, plus loin en relation avec les figures 5 à 7.Moreover, because of their composite nature, the modular aspect of the formwork elements 100 is favored, as will be seen, more precisely, further in connection with the Figures 5 to 7 .

On peut ainsi facilement proposer des éléments de coffrage 100 adaptables au chantier visé, sans complexité de montage ou coûts supplémentaires.It is thus easy to propose formwork elements 100 that are adaptable to the target site, without mounting complexity or additional costs.

Dans une variante de réalisation, l'élément de coffrage 100 peut être réalisé en matériau composite de fine épaisseur, notamment pour les éléments de coffrage ne présentant pas d'inserts de montage.In an alternative embodiment, the shuttering element 100 may be made of thin composite material, especially for shuttering elements that do not have mounting inserts.

Ceci permet de réduire les coûts de fabrication de la poutrelle 10.This reduces the manufacturing costs of the beam 10.

On peut citer, comme exemple non limitatif, une épaisseur inférieure à 2 mm.As a non-limiting example, a thickness of less than 2 mm may be mentioned.

Il est à noter que, pour les éléments de coffrage d'extrémité décrits plus loin, leur épaisseur peut être, dans un exemple non limitatif, de l'ordre de 10 mm.It should be noted that, for the end formwork elements described below, their thickness may be, in a non-limiting example, of the order of 10 mm.

Par ailleurs, l'élément de coffrage 100 peut comprendre, en outre, une platine 300 de liaison solidaire de la semelle 110 du profilé 101, faisant saillie à une extrémité de cette dernière.Furthermore, the shuttering element 100 may further comprise a connection plate 300 integral with the soleplate 110 of the profile 101, projecting at one end thereof.

Cette platine de liaison 300 est destinée à permettre la fixation de la poutrelle 10 sur une arase d'un mur, une longrine ou une poutre transversale lors de la réalisation d'un plancher.This connecting plate 300 is intended to allow the attachment of the beam 10 on a base of a wall, a sill or a cross beam during the production of a floor.

Cette platine de liaison 300 peut comprendre ou non un orifice 310 de fixation, de forme oblongue, adapté pour coopérer avec des éléments de fixation complémentaires solidaires des murs, longrines ou poutres précités.This connecting plate 300 may or may not include a mounting hole 310, of oblong shape, adapted to cooperate with complementary fastening elements integral walls, beams or aforementioned beams.

Dans une variante de réalisation, la platine 300 est destinée à coopérer avec une équerre adaptée solidaire d'une poutre, via des moyens de fixation amovibles de type tiges filetées/boulons. L'orifice de fixation 310 est ainsi destiné à recevoir la tige filetée.In an alternative embodiment, the plate 300 is intended to cooperate with a suitable bracket secured to a beam, via removable fastening means of threaded rods / bolts. The fixing orifice 310 is thus intended to receive the threaded rod.

Avantageusement, la platine est également en matériau composite et venue de moulage avec le profilé 101.Advantageously, the plate is also made of composite material and molded with the profile 101.

En participant ainsi à l'isolation thermique de la poutrelle, elle favorise la suppression des ponts thermiques des poutrelles 10 à leurs extrémités.By thus participating in the thermal insulation of the beam, it promotes the removal of the thermal bridges of the beams 10 at their ends.

L'élément de coffrage 100 comprend, en outre, des inserts de montage 140 et des réservations 130 venus de moulage avec le profilé 101 de l'élément de coffrage 100.The shuttering element 100 further comprises mounting inserts 140 and reservations 130 integrally molded with the profile 101 of the shuttering element 100.

Les inserts 140 de montage sont adaptés pour recevoir des éléments de vissage permettant la fixation d'éléments annexes tels que des plafonds directement sur la poutrelle 10, sans pièces de fixation intermédiaires telles que des languettes vissées dans le béton des poutrelles pour supporter lesdits aménagements.The inserts 140 for mounting are adapted to receive screwing elements allowing the attachment of additional elements such as ceilings directly on the beam 10, without intermediate fasteners such as tongues screwed into the concrete beams to support said arrangements.

Les réservations 130, quant à elles, sont susceptibles d'être utilisées comme repère pour la mise en place ultérieure d'inserts de montage ou toute autre pièce de montage adaptée.The reservations 130, for their part, may be used as a marker for the subsequent installation of mounting inserts or any other suitable mounting piece.

Ces inserts 140 et réservations 130 sont également des zones de renfort du profilé 101.These inserts 140 and reservations 130 are also zones of reinforcement of the section 101.

Ils peuvent, également, être renforcés d'une structure en nid d'abeille.They can also be reinforced with a honeycomb structure.

De tels inserts 140 et réservations 130 peuvent présenter diverses formes de réalisation.Such inserts 140 and reservations 130 may have various embodiments.

Des exemples non limitatifs de réalisation sont illustrés sur les figures 2 et 3.Nonlimiting examples of embodiment are illustrated on the Figures 2 and 3 .

Tel qu'illustré sur les figures 2 et 3, un insert 140 est susceptible d'être formé par un bossage 141 en saillie dans la concavité du profilé 101, sur la face intérieure 111 de la semelle 110 du profilé 101.As illustrated on Figures 2 and 3 an insert 140 may be formed by a boss 141 projecting into the concavity of the profile 101, on the inner face 111 of the sole 110 of the profile 101.

Un tel bossage 141 peut présenter, tel qu'illustré sur la figure 2, une section de forme générale en Ω droit, la concavité d' Ω étant dirigée vers l'extérieur du profilé 101, formant une gorge de fixation 142 ouverte adaptée pour recevoir un élément de fixation correspondant.Such a boss 141 may have, as illustrated on the figure 2 , a section of generally Ω-shaped, the concavity of Ω being directed outwardly of the section 101, forming an open fixing groove 142 adapted to receive a corresponding fastening element.

Un tel bossage 141 peut, également, présenter, dans un second mode de réalisation illustré sur la figure 3, une section de forme générale en Ω droit et être muni, sur sa face en regard de la semelle 110 du profilé 101, d'un doigt 143 faisant saillie à l'extérieur du profilé 101, perpendiculairement à la semelle 110.Such a boss 141 may also present, in a second embodiment illustrated in FIG. figure 3 a section of general shape in Ω right and be provided, on its side facing the sole 110 of the profile 101, a finger 143 projecting outside the section 101, perpendicular to the sole 110.

Ce doigt 143 est conformé pour coopérer avec un élément de fixation complémentaire. Ainsi, dans un exemple non limitatif, il peut présenter un trou central 144 taraudé destiné à coopérer avec une tige 1 de fixation filetée.This finger 143 is shaped to cooperate with a complementary fastening element. Thus, in a non-limiting example, it may have a tapped central hole 144 for cooperating with a threaded fastener rod 1.

Il est à noter que les réservations 130 peuvent comprendre, elles mêmes, des inserts de montage 140 comme précité.It should be noted that the reservations 130 may comprise, themselves, mounting inserts 140 as mentioned above.

De plus, les inserts de montage 140 peuvent être associés à des rehausseurs d'insert 145 (illustrés sur la figure 6) ayant une fonction similaire à celle de la gorge de fixation 142 décrite précédemment et permettant une fixation, telle qu'un vissage dans l'épaisseur du matériau composite du profilé 101.In addition, the mounting inserts 140 may be associated with insert boosters 145 (illustrated in FIG. figure 6 ) having a function similar to that of the fixing groove 142 described above and allowing attachment, such as screwing into the thickness of the composite material of the profile 101.

Par ailleurs, tel qu'illustré sur la figure 1, l'élément de coffrage 100 comprend, sur les bords supérieurs 151 des ailes latérales 150, une ou plusieurs ailettes de retour 160 transversales s'étendant parallèlement à la semelle 110 et dirigées vers l'intérieur du profilé 101.Moreover, as illustrated on the figure 1 , the shuttering element 100 comprises, on the upper edges 151 of the lateral wings 150, one or more transverse return fins 160 extending parallel to the sole 110 and directed towards the inside of the profile 101.

Dans un mode de réalisation, ces ailettes de retour 160, de forme triangulaire, sont situées à une extrémité des ailes 151 latérales et, de préférence, à leur extrémité opposée à la platine de liaison 300.In one embodiment, these return fins 160, of triangular shape, are located at one end of the lateral flanges 151 and, preferably, at their end opposite to the connecting plate 300.

Cette forme particulière des ailettes 160 offre l'avantage d'un démoulage simplifié du profilé 101.This particular shape of the fins 160 offers the advantage of a simplified demoulding of the profile 101.

Les ailettes de retour 160 sont destinées à offrir une surface de contact plus importante au profilé 101 de l'élément de coffrage 100, ceci afin d'assurer une meilleure solidarisation du profilé 101 avec le béton du dallage.The return fins 160 are intended to provide a greater contact surface to the section 101 of the shuttering element 100, this to ensure a better bonding of the section 101 with the concrete of the pavement.

De plus, les ailettes de retour 160 servent de cerclage pour une meilleure tenue de la poutrelle 10 une fois le profilé 101 rempli.In addition, the return fins 160 serve as strapping for better holding the beam 10 after the section 101 filled.

Elles jouent également un rôle de soutien pour les décrochements 152, décrits plus loin, lors de l'emboîtement de deux éléments de coffrage 100 décrit en relation avec les figures 9 et 10 ultérieurement.They also play a supporting role for the recesses 152, described below, during the interlocking of two formwork elements 100 described in connection with the Figures 9 and 10 later.

Un second mode de réalisation propose des ailettes de retour 160 uniformes sur toute la longueur des ailes 150 latérales, formant un plat au bord supérieur 151 de chaque aile latérale 150.A second embodiment provides return fins 160 that are uniform along the entire length of the lateral wings 150, forming a flat at the upper edge 151 of each lateral wing 150.

Par ailleurs, en référence aux figures 5 à 7, l'élément de coffrage 100 peut être adapté selon les besoins.Moreover, with reference to Figures 5 to 7 , the shuttering element 100 can be adapted as needed.

Il peut ainsi être réalisé en prévoyant, si nécessaire, des platines de liaison 300, des réservations 130, des inserts de montage 140, des ailettes de retour 160, des décrochements 152 (décrits plus loin en relation avec les figures 9 et 10) avant tout moulage du profilé 100.It can thus be achieved by providing, if necessary, connecting plates 300, reservations 130, mounting inserts 140, return fins 160, recesses 152 (described later in connection with the Figures 9 and 10 ) before any molding of the profile 100.

Dans une premier mode de réalisation, il peut être un élément de coffrage dit d'extrémité 102 de poutrelle 10, destiné à être fixé à des équerres 20 situées de part et d'autre de l'élément de coffrage 102 aux extrémités de la poutrelle 10, les équerres 20 étant destinées à recevoir les entrevous du plancher. Lesdites équerres 20 peuvent être habillées d'aérogel et de nid d'abeille.In a first embodiment, it may be a so-called end-end shuttering element 102 of beam 10, intended to be fixed to brackets 20 located on either side of the shuttering element 102 at the ends of the beam. 10, the brackets 20 being intended to receive floor interjoists. Said brackets 20 may be dressed with airgel and honeycomb.

Pour cela, chaque élément de coffrage d'extrémité 102 comprend, sur la face extérieure 153 des ailes latérales 150 du profilé 101, des moyens d'encliquetage 154 ou dispositifs similaires destinés à coopérer avec des moyens de fixation complémentaires prévus sur les équerres 20.For this purpose, each end-formwork element 102 comprises, on the outer face 153 of the lateral wings 150 of the profile 101, snap-fastening means 154 or similar devices intended to cooperate with complementary fastening means provided on the brackets 20.

Ces moyens de fixation complémentaires peuvent être des encoches ménagées sur les bords verticaux des équerres 20, faisant face aux faces extérieures 153 des ailes latérales 150 du profilé 101.These complementary fixing means may be notches formed on the vertical edges of the brackets 20, facing the outer faces 153 of the lateral wings 150 of the section 101.

Il est à noter que, de préférence, ces équerres 20 sont également en matériau composite.It should be noted that, preferably, these brackets 20 are also made of composite material.

De plus, chaque élément de coffrage d'extrémité 102 peut être pourvu d'une platine 300 de liaison décrite précédemment.In addition, each end formwork element 102 may be provided with a connection plate 300 previously described.

Chaque élément de coffrage d'extrémité 102 peut également être réalisé en mettant en place, si nécessaire, des réservations 130, inserts de montage 140 ou encore ailettes de retour 160, avant tout moulage du profilé 100.Each end-shuttering element 102 can also be made by placing, if necessary, reservations 130, mounting inserts 140 or return fins 160, before any molding of the profile 100.

Par ailleurs, dans un second mode de réalisation, l'élément de coffrage 100 peut être un longeron 103 intermédiaire s'étendant sur tout ou une partie de la longueur de la poutrelle 10, entre deux éléments de coffrage d'extrémité 102.Furthermore, in a second embodiment, the shuttering element 100 may be an intermediate spar 103 extending over all or part of the length of the beam 10, between two end shuttering elements 102.

Un tel élément de coffrage intermédiaire 103 peut, de façon similaire à un élément de coffrage d'extrémité 102 comprendre, si nécessaire, des réservations 130, inserts de montage 140 ou encore ailettes de retour 160.Such an intermediate formwork element 103 may, in a manner similar to an end formwork element 102, include, if necessary, reservations 130, mounting inserts 140 or return fins 160.

Leur mise en place sera réalisée avant tout moulage de l'élément de coffrage intermédiaire 103.Their implementation will be carried out before any molding of the intermediate formwork element 103.

Ainsi, la nature composite des profilés 101 des éléments de coffrage 100, 102, 103 permet de réaliser un seul moulage des pièces de coffrage complexes, favorisant un aspect modulaire du coffrage de la poutrelle 10 simple à mettre en oeuvre.Thus, the composite nature of the profiles 101 of the formwork elements 100, 102, 103 makes it possible to produce a single molding of the complex formwork parts, favoring a modular aspect of the formwork of the beam 10 that is simple to implement.

Par modulaire, on entend que le coffrage de la poutrelle 10 peut être formé d'une série d'éléments de coffrage 100 similaires ou non, ces éléments de coffrage étant adaptés aux besoins de réalisation de la poutrelle 10.By modular means that the formwork of the beam 10 may be formed of a series of formwork elements 100 similar or not, these formwork elements being adapted to the needs of realization of the beam 10.

Différentes poutrelles 10 dont le coffrage est formé par une pluralité d'éléments de coffrage sont illustrées sur les figures 5 à 7.Different beams 10 whose formwork is formed by a plurality of formwork elements are illustrated on the Figures 5 to 7 .

Ainsi, une poutrelle 10 peut comprendre un élément de coffrage d'extrémité 102, à chacune de ses extrémités, comme illustré sur la figure 5.Thus, a beam 10 may comprise an end formwork element 102, at each of its ends, as illustrated in FIG. figure 5 .

Elle peut, également, comprendre un élément de coffrage d'extrémité 102 à chacune de ses extrémités, associé à une pluralité d'éléments de coffrage intermédiaires 103, similaires ou non, répartis à distance ou non le long de la poutrelle 10, comme illustré sur la figure 6.It may also comprise an end-shuttering element 102 at each of its ends, associated with a plurality of intermediate formwork elements 103, similar or not, distributed remotely or not along the beam 10, as illustrated. on the figure 6 .

Sur la figure 6, deux types d'éléments de coffrage intermédiaire 103 sont intercalés le long de la poutrelle 10, à savoir deux éléments de coffrage intermédiaire 103 d'épaisseurs différentes.On the figure 6 two types of intermediate formwork elements 103 are interposed along the beam 10, namely two intermediate formwork elements 103 of different thicknesses.

La figure 7 illustre une poutrelle 10 comprenant deux éléments de coffrage d'extrémité 102 et un élément de coffrage intermédiaire 103 s'étendant entre les deux éléments de coffrage d'extrémité 102, de façon continue sur toute la longueur de la poutrelle 10.The figure 7 illustrates a beam 10 comprising two end formwork elements 102 and an intermediate formwork element 103 extending between the two end formwork elements 102, continuously along the entire length of the beam 10.

Comme l'illustrent ces figures de façon non limitative, tout type d'éléments de coffrage 100 selon l'invention et toute combinaison de ces derniers pour la réalisation de poutrelles 10 est possible, sans sortir du cadre de la présente invention.As illustrated in these figures without limitation, any type of formwork elements 100 according to the invention and any combination thereof for the production of beams 10 is possible, without departing from the scope of the present invention.

Ainsi, dans une variante de réalisation, l'élément de coffrage 100 peut être un élément de coffrage d'extrémité 102 s'étendant sur toute la longueur de la poutrelle 10 d'une extrémité de cette dernière à une autre.Thus, in an alternative embodiment, the shuttering element 100 may be an end shuttering element 102 extending the entire length of the beam 10 from one end of the latter to another.

De plus, dans une autre variante de réalisation, les éléments de coffrage intermédiaires 103 peuvent être différents en fonction de leur position sur la poutrelle 10.In addition, in another variant embodiment, the intermediate formwork elements 103 may be different depending on their position on the beam 10.

Ils peuvent comprendre ou non des moyens d'indexage 120 et/ou des réservations 130 et/ ou des inserts de montage 140 et/ou des ailettes 160 en fonction de leurs positions le long de la poutrelle 10.They may or may not include indexing means 120 and / or reservations 130 and / or mounting inserts 140 and / or fins 160 depending on their positions along the beam 10.

Par ailleurs, dans un mode de réalisation de la présente invention illustré sur la figure 8, les éléments de coffrage 100 peuvent être eux-mêmes coffrés par un emballage 30 de type emballage carton faisant office de coffrage lors du remplissage de la poutrelle 10 avec un matériau adapté.Moreover, in one embodiment of the present invention illustrated on the figure 8 , the formwork elements 100 may themselves be formed by a cartonboard-type package 30 as formwork during filling of the beam 10 with a suitable material.

La présence de cet emballage 30 facilite la fabrication de longues poutrelles 10 ou de poutrelles 10 sur chantier et permet de diminuer leurs coûts de fabrication.The presence of this packaging 30 facilitates the manufacture of long beams 10 or beams 10 on site and reduces their manufacturing costs.

En référence aux figures 1, 9 et 10, le coffrage d'une poutrelle 10 peut être constitué d'une pluralité d'éléments de coffrage 100 similaires ou non emboîtés.With reference to figures 1 , 9 and 10 , the formwork of a beam 10 may consist of a plurality of similar or non-nested formwork elements 100.

L'une et/ou l'autre des extrémités des deux ailes latérales 150 et la ou les extrémités de la semelle 110 correspondantes sont conformées de sorte que l'élément de coffrage 100 peut s'emboîter avec un élément de coffrage 100 adjacent lorsqu'ils sont en contact.One and / or the other of the ends of the two lateral wings 150 and the corresponding sole or ends of the soleplate 110 are shaped so that the shuttering element 100 can fit with an adjacent shuttering element 100 when they are in contact.

Ceci offre l'avantage d'offrir un coffrage de poutrelle sans rupture de continuité à partir de plusieurs éléments de coffrage 100 indépendants.This offers the advantage of providing a form of beam without continuity of continuity from several independent formwork elements 100.

Plus précisément, l'une et/ou l'autre des extrémités des deux ailes latérales 150 d'un profilé 101 peuvent comprendre, en fonction de la position du profilé 101 le long de la poutrelle et des éléments de coffrage adjacents, un décrochement 152 vertical.More specifically, one and / or the other of the ends of the two lateral wings 150 of a profile 101 may comprise, depending on the position of the profile 101 along the beam and adjacent formwork elements, a recess 152 vertical.

Ce décrochement 152 est apte à venir en contact avec un décrochement 152 de forme complémentaire présent aux extrémités correspondantes de chaque aile latérale 150 du profilé 101 de l'élément de coffrage 100 adjacent.This recess 152 is able to come into contact with a recess 152 of complementary shape present at the corresponding ends of each lateral flange 150 of the profile 101 of the adjacent shuttering element 100.

La forme et les dimensions du décrochement 152 d'un élément de coffrage 100 sont adaptées pour que ce décrochement 152 s'emboîte avec le décrochement 152 de l'élément de coffrage 100 juxtaposé.The shape and dimensions of the recess 152 of a shuttering element 100 are adapted so that the recess 152 engages with the recess 152 of the shuttering element 100 juxtaposed.

De plus, le bord vertical du décrochement 152 d'un élément de coffrage 100 forme butée au bord vertical du décrochement 152 de l'élément de coffrage 100 juxtaposé, lorsqu'ils sont disposés bord à bord.In addition, the vertical edge of the recess 152 of a shuttering element 100 forms a stop at the vertical edge of the recess 152 of the shuttering element 100 juxtaposed, when arranged edge to edge.

Un tel décrochement 152 vertical, de section en Z droit, peut être prévu sur le bord supérieur ou le bord inférieur des ailes latérales 150, ceci étant fonction des éléments de coffrage 100 adjacents avec lequel il est destiné à s'emboîter, comme cela est illustré sur la figure 10.Such a recess 152 vertical, of right Z section, can be provided on the upper edge or the lower edge of the lateral wings 150, this being a function of the adjacent formwork elements 100 with which it is intended to fit, as is illustrated on the figure 10 .

Concernant la semelle 110 du profilé 101 de l'élément de coffrage 100, elle présente une feuillure d'appui 112, à son extrémité correspondante au décrochement 150, tel qu'illustré sur les figures 1 et 9 notamment.Concerning the sole 110 of the profile 101 of the shuttering element 100, it has a support rebate 112, at its end corresponding to the recess 150, as illustrated in FIGS. figures 1 and 9 especially.

Cette feuillure 112 est propre à se fixer avec des moyens adaptés sur une surface d'appui complémentaire prévue sur l'élément de coffrage 100 adjacent. Ces moyens peuvent être des moyens de collage, par exemple.This rabbet 112 is adapted to be fixed with suitable means on a complementary bearing surface provided on the adjacent formwork element 100. These means may be gluing means, for example.

De plus, les feuillures d'appui 112 forment des zones prédécoupées, offrant l'avantage de pouvoir raccourcir le coffrage d'une poutrelle trop long en précassant les éléments de coffrage en excès ou de pouvoir rallonger la longueur du coffrage de poutrelle, en emboitant de nouveaux éléments de coffrage 100 en fonction de la longueur souhaitée de cette dernière.In addition, the support rebates 112 form pre-cut zones, offering the advantage of being able to shorten the formwork of a beam that is too long by precasting the excess formwork elements or to be able to lengthen the length of the beam formwork, by interlocking new formwork elements 100 depending on the desired length of the latter.

Les éléments de coffrage 100 selon l'invention sont ainsi adaptables en fonction des besoins spécifiques du chantier.The formwork elements 100 according to the invention are thus adaptable according to the specific needs of the site.

Bien évidemment, l'invention ne s'applique pas aux seules formes d'exécution de l'élément de coffrage qui ont été décrites ci-dessus, à titre d'exemples mais elle en embrasse, au contraire, toutes les variantes de réalisation possibles.Of course, the invention does not apply to the embodiments of the formwork element which have been described above, as examples but it embraces, on the contrary, all the possible embodiments. .

Ainsi, la description des différentes variantes de réalisation de l'élément de coffrage 100 selon l'invention et les poutrelles 10 associées ainsi que les avantages qui en résultent s'appliquent, également, à des élements de coffrage 100 de poutrelles destinées à la construction de balcons et loggia.Thus, the description of the various alternative embodiments of the shuttering element 100 according to the invention and the associated beams and the resulting advantages also apply to shuttering elements 100 of beams intended for construction. balconies and loggia.

De telles poutrelles 10 et les élements de coffrages associés 100 sont illustrés sur les figures 12, 13 et 14.Such beams 10 and the associated formwork elements 100 are illustrated in FIGS. Figures 12, 13 and 14 .

Les poutrelles 10 peuvent notamment être mises en place entre la prédalle 1 du plancher et le sol 2 du balcon.The beams 10 may in particular be placed between the floor 1 of the floor and the floor 2 of the balcony.

Dans ce type de constructions, les élements de coffrage 100 peuvent comprendre, en outre, sur leurs parois latérales 150, des orifices traversants 301 adaptés pour recevoir des barres de renforcement transversales 300 adaptées pour traverser de part et d'autre l'élement de coffrage 100 correspondant.In this type of construction, the shuttering elements 100 may further comprise, on their lateral walls 150, through orifices 301 adapted to receive transverse reinforcing rods 300 adapted to pass through the shuttering element on either side. 100 corresponding.

Ces barres de renforcement transversales 300 sont destinées à former des torons pour la poutrelle 10 selon l'invention, et reprendre ainsi les efforts exercés sur la poutrelle 10 et les éléments de coffrage 100 correspondants.These transverse reinforcement bars 300 are intended to form strands for the beam 10 according to the invention, and thus resume the forces exerted on the beam 10 and the corresponding formwork elements 100.

Dans une variante de réalisation, elles sont, de préférence, en matériau composite, ceci afin de favoriser une grande isolation thermique des constructions.In an alternative embodiment, they are preferably made of composite material, in order to promote a high thermal insulation of the constructions.

Ainsi, comme illustré sur les figures 13 et 14 dans le cas de la construction d'un balcon, la poutrelle 10 selon l'invention disposée à l'interface entre le sol 2 du balcon et la prédalle 1 de l'ossature d'un plancher coopèrent avec les barres de renforcement 300 transversales la traversant.Thus, as illustrated on figures 13 and 14 in the case of the construction of a balcony, the beam 10 according to the invention disposed at the interface between the floor 2 of the balcony and the floor 1 of the floor frame cooperate with the reinforcement bars 300 transverse the crossing.

Il est à noter que de telles poutrelles 10 peuvent être autoporteuses ou simplement posées sur la prédalle 1.It should be noted that such beams 10 may be self-supporting or simply placed on the floor 1.

Les barres de renforcement 300 sont, de plus, noyées dans la prédalle 1 et le sol 2 du balcon.The reinforcing bars 300 are, moreover, embedded in the floor 1 and the floor 2 of the balcony.

Un tel ensemble favorise la suppression des ruptures de ponts thermiques dans les constructions extérieures de type balcon et loggia.Such an assembly promotes the elimination of breaks in thermal bridges in outdoor buildings such balcony and loggia.

Il est à noter que de telles poutrelles 10 peuvent être autoporteuses ou simplement posées sur la prédalle 1.It should be noted that such beams 10 may be self-supporting or simply placed on the floor 1.

Comme illustré sur la figure 15, au moins deux éléments de coffrage 100 mis bout à bout peuventt être configurés pour être installés sur une arase de mur 400 ou un élément de construction, tel qu'un parpaing, et servir de support à une poutrelle 10, comme celle illustrée sur la figure 11. Une platine ou barre de renforcement transversale 300 peut être configurée pour venir se raccorder sur un décrochement 152 d'un élément de coffrage. Chaque élément de coffrage 100 peut avoir des parois latérales de h hauteur différente.As illustrated on the figure 15 at least two end-to-end shuttering elements 100 can be configured to be installed on a wall screed 400 or a construction element, such as a concrete block, and to support a beam 10, as illustrated in FIG. figure 11 . A platinum or transverse reinforcement bar 300 may be configured to be connected to a recess 152 of a formwork element. Each shuttering element 100 may have side walls of different heights.

Un tel mode de réalisation permet de couler une table de compression en même temps qu'une ceinture.Such an embodiment makes it possible to cast a compression table at the same time as a belt.

Ainsi, il est possible de réaliser une ceinture, et non pas une poutre, avec une carcasse composite servant à la fois de planelle de rive et permettant une isolation en totalité. L'isolation peut être améliorée grâce à un aérogel pouvant être disposé en face interne dudit élément de coffrage 100 entraînant un gain de poids dans la manipulation et l'installation.Thus, it is possible to produce a belt, and not a beam, with a composite carcass serving both as a bedplate and allowing insulation in its entirety. The insulation can be improved by means of an airgel which can be disposed on the internal face of said shuttering element 100, resulting in a gain in weight in handling and installation.

Il est possible de choisir un aérogel capable de supporter 2000 fois sa masse.It is possible to choose an airgel capable of supporting 2000 times its mass.

Claims (16)

Elément de coffrage (100) pour la construction d'une poutrelle (10) à armature comprenant un profilé (101) destiné à se fixer à l'armature (200) et à recevoir des moyens pour noyer partiellement ladite armature (200) caractérisé en ce que ledit profilé (101) est formé en matériau composite pour assurer la tenue au feu de ladite poutrelle (10).Formwork element (100) for the construction of a reinforcement beam (10) comprising a profile (101) for attachment to the reinforcement (200) and for receiving means for partially embedding said reinforcement (200) characterized by what said profile (101) is formed of composite material to ensure the fire resistance of said beam (10). Elément selon la revendication 1 caractérisé en ce qu'il comprend, en outre, une platine de liaison (300) venue de moulage avec le profilé (101), ladite platine (300) étant destinée à fixer l'élément de coffrage (100) à un élément de mur adapté.Element according to claim 1 characterized in that it further comprises a connecting plate (300) integrally molded with the profile (101), said plate (300) being intended to fix the formwork element (100) to a wall element adapted. Elément selon la revendication 2 caractérisé en ce que la platine de liaison (300) est en matériau composite.Element according to claim 2 characterized in that the connecting plate (300) is made of composite material. Elément selon l'une des revendications 1 à 3 caractérisé en ce que le profilé (101) comprenant une semelle (110) et deux ailes latérales (150) de part et d'autre de ladite semelle, la semelle (110) est conformée de sorte de comprendre au moins un insert de montage (140).Element according to one of claims 1 to 3 characterized in that the profile (101) comprising a sole (110) and two lateral wings (150) on either side of said sole, the sole (110) is shaped from to include at least one mounting insert (140). Elément selon la revendication 4 caractérisé en ce que l'insert de montage (140) est un bossage faisant saillie de la semelle (110), dans la concavité du profilé (101), ledit bossage comprenant une gorge de fixation d'éléments de fixation complémentaires ou un doigt de fixation d'éléments de fixation complémentaires faisant saillie à l'extérieur du profilé (101).Element according to Claim 4, characterized in that the mounting insert (140) is a boss projecting from the sole (110), in the concavity of the section (101), said boss comprising a fixing element fixing groove (101). complementary or a fixing finger complementary fastening elements projecting outside the profile (101). Elément selon la revendication 1 caractérisé en ce que le profilé (101) comprend des moyens d'indexage (120) de ladite armature..Element according to claim 1 characterized in that the profile (101) comprises indexing means (120) of said frame. Elément selon la revendication 6 caractérisé en ce que l'armature étant formée d'une série de barres en matériau métallique ou composite, les moyens d'indexage (120) sont adaptés pour indexer lesdites barres d'armature de dimensions et de forme différentes.Element according to claim 6 characterized in that the armature being formed of a series of bars of metal or composite material, the indexing means (120) are adapted to index said rebar of different dimensions and shape. Elément selon l'une des revendications 4 à 7 caractérisé en ce que le profilé (101) comprend des ailettes de retour (160) transversales s'étendant des ailes latérales (150) vers l'intérieur du profilé.Element according to one of claims 4 to 7 characterized in that the section (101) comprises transverse return fins (160) extending from the lateral wings (150) towards the inside of the profile. Elément selon l'une des revendications 4 à 8 caractérisé en ce que l'une et/ou l'autre des extrémités des ailes latérales (150) sont conformées de sorte que l'élément de coffrage (100) peut s'emboîter avec un élément de coffrage adjacent, lesdites extrémités des ailes latérales (150) comprennent, chacune, un décrochement (152) apte à s'emboîter un décrochement (152) de forme complémentaire présent à une extrémité correspondante d'une aile latérale (150) d'un élément de coffrage (100) adjacent.Element according to one of claims 4 to 8 characterized in that one and / or the other of the ends of the lateral wings (150) are shaped so that the shuttering element (100) can fit with a adjacent formwork element, said ends of the lateral wings (150) each comprise a recess (152) capable of fitting a recess (152) of complementary shape present at a corresponding end of a lateral wing (150) of an adjacent formwork member (100). Elément selon l'une des revendications 4 à 9 caractérisé en ce que la semelle (110) du profilé (101) comprend au moins une feuillure d'appui (112) propre à se fixer sur une surface d'appui complémentaire prévue sur un élément de coffrage (100) adjacent de sorte que l'élément de coffrage (100) peut s'emboîter avec l'élément de coffrage adjacent.Element according to one of claims 4 to 9 characterized in that the sole (110) of the profile (101) comprises at least one support rebate (112) adapted to be fixed on a complementary bearing surface provided on an element shuttering element (100) adjacent so that the shuttering element (100) can fit with the adjacent shuttering element. Elément selon l'une des revendications 4 à 10 caractérisé en ce que les ailes latérales (150) du profilé (101) comprennent des moyens de fixation aptes à coopérer avec des moyens de fixation complémentaires ménagés sur des équerres destinées à supporter des entrevous.Element according to one of claims 4 to 10 characterized in that the lateral wings (150) of the profile (101) comprise fastening means adapted to cooperate with complementary fastening means arranged on brackets for supporting interjoists. Poutrelle (10) caractérisée en ce qu'elle comprend au moins un élément de coffrage (100) selon l'une des revendications précédentes et une armature métallique ou composite (200) destinée à être fixée audit élément de coffrage (100).Beam (10) characterized in that it comprises at least one shuttering element (100) according to one of the preceding claims and a metal or composite reinforcement (200) intended to be fixed to said shuttering element (100). Poutrelle selon la revendication 13 caractérisée en ce qu'elle comprend, en outre, un talon comprenant une structure en nid d'abeille.Beam according to claim 13, characterized in that it further comprises a heel comprising a honeycomb structure. Poutrelle selon l'une des revendications 12 à 13 caractérisée en ce qu'elle comprend un coffrage modulaire formé d'une série d'éléments de coffrage (100) similaires ou non, ces éléments de coffrage étant emboîtés ou répartis le long de l'armature (200).Beam according to one of Claims 12 to 13, characterized in that it comprises a modular formwork formed of a series of similar or different formwork elements (100), these formwork elements being nested or distributed along the frame (200). Ensemble de construction comprenant une poutrelle (10) selon l'une des revendications 12 à 14 et des barres de renforcement transversales (300) en matériau composite adaptées pour traverser les éléments de coffrage (100) de ladite poutrelle (10).Construction assembly comprising a beam (10) according to one of claims 12 to 14 and transverse reinforcing bars (300) of composite material adapted to pass through the shuttering elements (100) of said beam (10). Ensemble selon la revendication précédente et les revendications 9, 10 ou 11, caractérisé en ce qu'au moins deux éléments de coffrage (100) sont configurés pour être installés sur une arase de mur (400) ou un élément de construction et servir de support à une poutrelle (10) par l'intermédiaire d'un ou de plusieurs décrochements (152) aptes à recevoir chacun une barre de renforcement transversale (300).Assembly according to the preceding claim and claims 9, 10 or 11, characterized in that at least two shuttering elements (100) are configured to be installed on a wall screed (400) or a construction element and serve as support to a beam (10) via one or more recesses (152) each adapted to receive a transverse reinforcing bar (300).
EP11153695.9A 2010-02-08 2011-02-08 Formwork element for building a beam Active EP2444567B1 (en)

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CN114150864B (en) * 2021-12-02 2023-01-31 浙江银晨建设有限公司 Large-span prestressed concrete roof beam formwork structure

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0870883A2 (en) * 1997-04-11 1998-10-14 Gruppo Effe 2 SpA Prefabricated joist for floors and/or lintels made of a framework and brick, and brick base for said joist
EP1398427A1 (en) * 2002-09-11 2004-03-17 Ezio Ferrari Element for the positioning of reinforcing bars and trestles in concrete joists
DE20309363U1 (en) * 2003-06-17 2004-07-22 Filigran Trägersysteme GmbH & Co KG Constructional beam for building wall or ceiling has cement beam with reinforcement frame connected by load transfer nodes
EP1967667A1 (en) * 2007-03-07 2008-09-10 CSR limited Roofing tile

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2077792B (en) * 1980-03-22 1983-06-08 Tinsley Building Prod Ltd Casting reinforced concrete floors
FR2940337B1 (en) * 2008-12-19 2010-12-31 Isoltop METAL BEAM FOR THE MANUFACTURE OF FLOORS

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0870883A2 (en) * 1997-04-11 1998-10-14 Gruppo Effe 2 SpA Prefabricated joist for floors and/or lintels made of a framework and brick, and brick base for said joist
EP1398427A1 (en) * 2002-09-11 2004-03-17 Ezio Ferrari Element for the positioning of reinforcing bars and trestles in concrete joists
DE20309363U1 (en) * 2003-06-17 2004-07-22 Filigran Trägersysteme GmbH & Co KG Constructional beam for building wall or ceiling has cement beam with reinforcement frame connected by load transfer nodes
EP1967667A1 (en) * 2007-03-07 2008-09-10 CSR limited Roofing tile

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FR2956139B1 (en) 2012-02-24
EP2444567B1 (en) 2021-01-13
FR2956139A1 (en) 2011-08-12

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