EP1512803A1 - Interlocking moulded formwork - Google Patents

Interlocking moulded formwork Download PDF

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Publication number
EP1512803A1
EP1512803A1 EP04103549A EP04103549A EP1512803A1 EP 1512803 A1 EP1512803 A1 EP 1512803A1 EP 04103549 A EP04103549 A EP 04103549A EP 04103549 A EP04103549 A EP 04103549A EP 1512803 A1 EP1512803 A1 EP 1512803A1
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EP
European Patent Office
Prior art keywords
interjoists
compartments
allow
ribs
formwork
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EP04103549A
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German (de)
French (fr)
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EP1512803B1 (en
Inventor
Jean-François Colson
Stéphane RENAUDIN
Patrick Le Duc
Pierre Experton
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Fimurex SAC
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Fimurex SAC
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    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B5/00—Floors; Floor construction with regard to insulation; Connections specially adapted therefor
    • E04B5/16—Load-carrying floor structures wholly or partly cast or similarly formed in situ
    • E04B5/17—Floor structures partly formed in situ
    • E04B5/23—Floor structures partly formed in situ with stiffening ribs or other beam-like formations wholly or partly prefabricated
    • E04B5/26—Floor structures partly formed in situ with stiffening ribs or other beam-like formations wholly or partly prefabricated with filling members between the beams
    • E04B5/261—Monolithic filling members
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B5/00—Floors; Floor construction with regard to insulation; Connections specially adapted therefor
    • E04B5/16—Load-carrying floor structures wholly or partly cast or similarly formed in situ
    • E04B5/17—Floor structures partly formed in situ
    • E04B5/23—Floor structures partly formed in situ with stiffening ribs or other beam-like formations wholly or partly prefabricated
    • E04B5/26—Floor structures partly formed in situ with stiffening ribs or other beam-like formations wholly or partly prefabricated with filling members between the beams
    • E04B5/268—End filling members to be placed between the floor and the wall, e.g. thermal breaks
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B5/00—Floors; Floor construction with regard to insulation; Connections specially adapted therefor
    • E04B5/16—Load-carrying floor structures wholly or partly cast or similarly formed in situ
    • E04B5/17—Floor structures partly formed in situ
    • E04B5/23—Floor structures partly formed in situ with stiffening ribs or other beam-like formations wholly or partly prefabricated
    • E04B5/28—Cross-ribbed floors

Definitions

  • the invention relates to the field of the realization of concrete floors armed.
  • the framework of these floors is often composed of beams a wire mesh, and formwork elements called interjoists, the whole being covered with a concrete site called compression table.
  • the invention is more particularly a thin-walled interjoists adaptable whatever the conditions of construction, and realizing the formwork of the floor in its entirety.
  • thin-walled interjoists commonly used comprise a plurality of compartments, making it possible to reduce the volume of poured concrete, and therefore the weight of a floor made by this method.
  • GB 2 077 792 discloses a thin-walled interjoists, having a plurality of compartments. It is directly deposited on joists with wire mesh.
  • such a device does not include any arrangement provided for facilitate, before pouring concrete, the fixing of ancillary elements such as false ceilings especially. Therefore, it is necessary to drill the slab poured, which on the one hand weakens said slab and, on the other hand, requires relatively long recovery operations.
  • Document FR 2,786,514 describes a thin-walled interjoists comprising a plurality of compartments, and provided with marked areas for guiding the bucking, so as to allow the dimensional adaptation of the interjoists to its place of positioning between the beams.
  • the invention therefore relates to a thin-walled molded interjoists intended for be placed between two wire mesh girders and rest on their base fastener for forming the formwork of a compression table of a floor.
  • the contact surface between the beams and the interjoists are discontinuous along the whole length of the interjoists, ie levels of its two side edges.
  • the implementation of areas of least resistance allows for greater ease of adaptation dimensionality of interjoists, since then, it is enough for a worker to position the ad hoc rib for example on a straight edge, then to exercise a simple pressure on the compartment or compartments then being cantilevered, to obtain a substantially rectilinear zone, corresponding to the desired dimension of the interjoists.
  • the length of the interjoists does not correspond usually not to the length of the gap covered by the beams, at least one end interjoists must be cut in order to adapt its length to function of the floor to form, which thus makes it possible to carry out in an easy way the interjoists of the invention.
  • the vertical recesses may have zones thicker substantially parallel to the upper surface of the fastening base beams. These thicker areas can be in the form of pre-drilled bosses to facilitate the placement of fasteners, such as clips for holding pipes or sleeves or threaded rods for fastening false ceilings.
  • Such thicker areas may also be disposed of to others places on the interjoists, and particularly at the level of the substantially plane faces of each compartment, but also at the level of the inclined faces between two compartments.
  • the compartments are open on the face bottom of the interjoists to allow to save a lot of space when of their storage and their routing on a building site in particular. Indeed, he It is then possible to stack them one above the other so as to reduce their size.
  • the interjoists can also have at each end of his plus large dimension of complementary shape arrangements to allow a continuous splicing between two consecutive interjoists. Indeed, to allow the transport and handling of interjoin on construction sites, it is preferable to use intervous of reduced length. By the superposition of the extremities two consecutive interjoists, liquid concrete is then prevented from escaping level of the connection between two successive interjoists.
  • the interjoists To resist the weight of the liquid concrete that it must form, the interjoists must have some resistance. However, he must also answer the lightweight constraint to allow easy handling on site and especially to avoid weighing down the floor structure. Thus, it has been established that good compromise was obtained with walls whose thickness is at most equal to ten millimeters.
  • the space between two beams can vary in certain cases of figures, it it is then necessary to cut longitudinally the interjoists, which generates a lateral opening of the compartments constituting it. It is then possible to provide this open lateral face of a lid, acting as an interface with the base of fixing the beam and extending in the same direction.
  • the lid has a cross section substantially Z-shaped. This configuration makes it possible to perform the function of formwork, but also to ensure the guidance of the interjoists between the two beams.
  • the lid can be inserted by clipping on the cut face of the interjoists, and according to the size of the interjoists used, it is possible to adapt the height of the lid by cutting a portion constituting it or by sliding of one piece relative to another. Indeed, the operculum has a breakable part to adapt to different configurations possible.
  • Each end interjoist is provided with a piece of end to achieve the total formwork to the walls. So we use two ends per bay that can slide under a portion of the interjoists to perfectly fit the length of each span.
  • a relatively large portion of the tip, at the level of the contact with the wall, is also able to be cut in order to fit into the where the wall is not perpendicular to the direction of the spans.
  • the material used for such interjoists can be a composite material to base of fibers or natural particles and glue. Fibers or particles Naturals can then be chosen from wood, flax and hemp in particular.
  • lids and abouts reported can also be made in the same material as the interjois itself.
  • the invention relates to a wall-molded interjoists thin slats able to be arranged between two trusses with wire mesh and to be laid down on the base of fixing said beams.
  • the interjoists (1) comprise a plurality of compartments (5) separated by ribs (6).
  • each of these ribs (6) is provided with a zone of less resistor (18), typically constituted by a thinning, and suitable for to allow the splitting of the interjoists at the level of said rib, therefore in one or several lots of compartments (5).
  • the interjoists (1) is arranged between two trusses (2) with wire mesh (3). It rests on the upper face (8) of the fixing base (4) of said beams (2).
  • the contact surface between the interjoists (1) and the fixing base (4) is discontinuous on at least one of the support sides of interjoists (1) on the beam (2).
  • a vertical recess (7) at at least one end of each of the ribs (6) extends below the face upper (8) of the fastening base (4) of each beam (2).
  • This configuration allows then to carry out guidance during the implementation of interjoists (1) between two beams (2). This guidance is carried out at the level of side faces (9), the two beams (2) facing each other. So, setting up interjoists (1) between two beams (2) can not be hindered by the trellis metal (3) emerging from the fixing base (4) of the beams (2).
  • the lower face is hollowed out so as to create compartments (5) open on the underside or concave. In this way, it is possible stack interjoists (1) one above the other and thus reduce their footprint.
  • each compartment (5) may be advantageous, as represented in FIG. 3, to provide the upper face of each compartment (5) a reinforcing rib (15).
  • the interjoists (1) has at each end of its largest dimension of arrangements (11, 12) of complementary shape, capable of cooperate with each other, to allow continuous splicing between two interjoin (1).
  • This configuration makes it possible to form a total of one floor and thus prevents liquid concrete, during casting, from escaping through interstices between two interjoists (1). It also prevents an operator from realizing clogging at the different connections.
  • interjoists (1) whose wall thickness is at most equal to ten millimeters.
  • the interjoists (1) present, at its vertical recesses (7), zones (10) reinforced, able to support a false ceiling or pipes.
  • Reinforced zones (14) can also be arranged on the walls inclined sides (13) of the compartments (5). These reinforced areas (10, 14), therefore thicker, may have the shape of pre-drilled bosses, allowing to introduce fastening elements such as clips, to maintain in position a cable or sheath, or threaded rods to allow the installation of a false ceiling in particular.
  • the section of the covers (16) has a shape of "Z" as shown in Figure 8. These lids can further be monoblocks. In this case the operculum (16) is cut in the direction of its length to adapt to the configurations specific to each site.
  • the cover (16) can also be composed two pieces (19, 20) adapted to allow the realization of an adjustment according to the height of the interjoists (1) used.
  • the interjoists (1) may be provided with a (17) to complete the formwork to the wall. Two abouts (17) are therefore reported on each span and can slide under a portion of the interjoists (1) end to fit perfectly the length of the spans.
  • a relatively large portion of the tip (17) at the level of the zone contact with the wall is also able to be cut to allow its adaptation in the case where the wall is not perpendicular to the direction of the spans, and corollary, avoid any risk of introduction of concrete under the interjoists.
  • the interjoists (1) is made of a composite material based on natural fibers and glue.
  • the selected natural fibers make part of the group of wood, flax and hemp.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Forms Removed On Construction Sites Or Auxiliary Members Thereof (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Glass Compositions (AREA)
  • Cartons (AREA)
  • Inorganic Insulating Materials (AREA)
  • Dental Preparations (AREA)
  • Gasket Seals (AREA)

Abstract

The unit has multiple compartments (5) opening on lower side of the unit and separated by ribs. The length of the ribs is lower than the length of the compartments such that the ribs are not supported on a fixing base (4) of girders (2). An end of each rib has a vertical unhooking part projecting below an upper surface (8) of the fixing base of each girder so that the part contacts with one of lateral surfaces (9) of the base.

Description

Domaine TechniqueTechnical area

L'invention se rapporte au domaine de la réalisation de planchers en béton armé. L'ossature de ces planchers est souvent composée de poutrelles comportant un treillis métallique, et d'éléments coffrant appelés entrevous, le tout étant recouvert d'un béton de chantier appelé table de compression.The invention relates to the field of the realization of concrete floors armed. The framework of these floors is often composed of beams a wire mesh, and formwork elements called interjoists, the whole being covered with a concrete site called compression table.

L'invention vise plus particulièrement un entrevous à paroi minces adaptable quelles que soient les conditions de chantier, et réalisant le coffrage du plancher dans sa totalité.The invention is more particularly a thin-walled interjoists adaptable whatever the conditions of construction, and realizing the formwork of the floor in its entirety.

Art antérieurPrior art

De manière connue, les entrevous à parois minces couramment utilisés comportent une pluralité de compartiments, permettant de réduire le volume de béton coulé, et par conséquent le poids d'un plancher réalisé par cette méthode.In known manner, thin-walled interjoists commonly used comprise a plurality of compartments, making it possible to reduce the volume of poured concrete, and therefore the weight of a floor made by this method.

Le document GB 2 077 792, décrit un entrevous à parois minces, comportant une pluralité de compartiments. Il est directement déposé sur les poutrelles à treillis métallique.GB 2 077 792 discloses a thin-walled interjoists, having a plurality of compartments. It is directly deposited on joists with wire mesh.

Cependant, un tel dispositif ne comporte pas d'aménagement prévu pour faciliter, avant la coulée du béton, la fixation d'éléments annexes tels que des faux-plafonds notamment. Par conséquent, il est alors nécessaire de percer la dalle une fois coulée, ce qui d'une part, fragilise ladite dalle et, d'autre part, nécessite des opérations supplémentaires de reprise relativement longues.However, such a device does not include any arrangement provided for facilitate, before pouring concrete, the fixing of ancillary elements such as false ceilings especially. Therefore, it is necessary to drill the slab poured, which on the one hand weakens said slab and, on the other hand, requires relatively long recovery operations.

Dans certaines conditions particulières de chantier, lorsque l'entraxe entre deux poutrelles n'est pas constant, il devient alors nécessaire de découper l'entrevous pour l'adapter au nouvel entraxe, afin de réduire sa largeur. Cependant, dans ce cas, les compartiments d'une face latérale de l'entrevous sont ouverts et débouchent du coté où le coffrage doit être réalisé. Ces ouvertures sont alors colmatées sur place, mais ne permettent pas de réaliser un coffrage parfait du plancher. In certain particular site conditions, when the center distance between two beams is not constant, it becomes necessary to cut the interjoists to adapt to the new center distance, to reduce its width. However, in this case, the compartments of a side face of the interjoists are open and open on the side where the formwork is to be made. These openings are then clogged on the spot, but do not allow to realize a perfect formwork of the floor.

Le document FR 2 786 514 décrit un entrevous à parois minces comportant une pluralité de compartiments, et pourvu de zones marquées pour guider le tronçonnage, de telle sorte à permettre l'adaptation dimensionnelle de l'entrevous à son lieu de positionnement entre les poutrelles.Document FR 2,786,514 describes a thin-walled interjoists comprising a plurality of compartments, and provided with marked areas for guiding the bucking, so as to allow the dimensional adaptation of the interjoists to its place of positioning between the beams.

L'introduction d'un tel entrevous est guidée par au moins une poutrelle en forme de T renversé. Cependant, ce guidage particulier est problématique dans le cas où la portion centrale émergeant de la poutrelle à âme n'est pas pleine mais constituée d'un treillis métallique qui serait mal enrobé en cas de contact avec le bord de l'entrevous.The introduction of such interjoists is guided by at least one beam in T shape overturned. However, this particular guidance is problematic in the case where the central portion emerging from the beam is not full but consisting of a wire mesh that would be poorly coated in case of contact with the edge of the interjoists.

En outre, l'adaptation dimensionnelle de tels entrevous n'est pas satisfaisante.In addition, the dimensional adaptation of such interjoists is not satisfactory.

Exposé de l'inventionPresentation of the invention

L'invention concerne donc un entrevous moulé à parois minces, destiné à être disposé entre deux poutrelles à treillis métallique et à reposer sur leur base de fixation pour réaliser le coffrage d'une table de compression d'un plancher.The invention therefore relates to a thin-walled molded interjoists intended for be placed between two wire mesh girders and rest on their base fastener for forming the formwork of a compression table of a floor.

Un tel entrevous comporte une pluralité de compartiments séparés deux à deux par une nervure, et se caractérise en ce que :

  • la longueur de chaque nervure est inférieure à la longueur des compartiments, de telle sorte à ne jamais prendre appui sur la base de fixation des poutrelles ;
  • l'entrevous comporte, au niveau d'au moins une extrémité de chacune des nervures, un décrochement vertical se prolongeant en dessous de la face supérieure de la base de fixation de chaque poutrelle, et qui est apte à venir en contact avec l'une des faces latérales de ladite base de fixation ;
  • chacune des nervures est munie d'au moins une zone de moindre résistance, de telle sorte à permettre la sécabilité de l'entrevous entre deux compartiments adjacents, en l'absence de tout outil.
Such interjoists comprise a plurality of compartments separated two by two by a rib, and is characterized in that:
  • the length of each rib is less than the length of the compartments, so that never bear on the fixing base of the beams;
  • the interjoists comprises, at the level of at least one end of each of the ribs, a vertical recess extending below the upper face of the fixing base of each beam, and which is adapted to come into contact with one of side faces of said fastening base;
  • each of the ribs is provided with at least one zone of least resistance, so as to allow the breakage of the interjoists between two adjacent compartments, in the absence of any tool.

Autrement dit, selon l'invention, la surface de contact entre les poutrelles et l'entrevous est discontinue sur toute la longueur de l'entrevous, c'est à dire au niveaux de ses deux bords latéraux. In other words, according to the invention, the contact surface between the beams and the interjoists are discontinuous along the whole length of the interjoists, ie levels of its two side edges.

Au niveau de chaque zone de non contact entre l'entrevous et la face supérieure de la base de fixation des poutrelles, une portion verticale se prolonge alors en dessous de la face supérieure de la base de fixation. Ainsi, l'insertion des entrevous entre deux poutrelles est guidée au niveau des deux faces latérales proximales de deux bases de fixation se faisant face.At the level of each non-contact zone between the interjoists and the face upper part of the joists fixing base, a vertical portion is extended then below the upper face of the fixing base. Thus, the insertion of between two beams is guided at the two lateral faces proximal of two fixation bases facing each other.

Enfin, la mise en oeuvre de zones de moindre résistance, correctement conformées, permet d'aboutir à une plus grande facilité d'adaptation dimensionnelle des entrevous, puisqu'alors, il suffit pour un ouvrier de positionner la nervure ad hoc par exemple sur une arête rectiligne, puis d'exercer une simple pression sur le ou les compartiments se trouvant alors en porte à faux, pour obtenir une zone sensiblement rectiligne, correspondant à la dimension recherchée de l'entrevous. Ce faisant, comme la longueur des entrevous ne correspond généralement pas à la longueur du vide couvert par les poutrelles, au moins un entrevous d'extrémité doit donc être découpés afin d'adapter sa longueur en fonction du plancher à coffrer, ce que permet ainsi de réaliser de manière aisée l'entrevous de l'invention.Finally, the implementation of areas of least resistance, correctly consistent, allows for greater ease of adaptation dimensionality of interjoists, since then, it is enough for a worker to position the ad hoc rib for example on a straight edge, then to exercise a simple pressure on the compartment or compartments then being cantilevered, to obtain a substantially rectilinear zone, corresponding to the desired dimension of the interjoists. In doing so, as the length of the interjoists does not correspond usually not to the length of the gap covered by the beams, at least one end interjoists must be cut in order to adapt its length to function of the floor to form, which thus makes it possible to carry out in an easy way the interjoists of the invention.

Selon l'invention, les décrochements verticaux peuvent présenter des zones plus épaisses sensiblement parallèles à la surface supérieure de la base de fixation des poutrelles. Ces zones plus épaisses peuvent se présenter sous la forme de bossages pré-percés pour faciliter la mise en place d'éléments de fixation, tels des clips pour maintenir des tuyaux ou des gaines ou des tiges filetées pour la fixation de faux-plafonds.According to the invention, the vertical recesses may have zones thicker substantially parallel to the upper surface of the fastening base beams. These thicker areas can be in the form of pre-drilled bosses to facilitate the placement of fasteners, such as clips for holding pipes or sleeves or threaded rods for fastening false ceilings.

De telles zones plus épaisses peuvent également être disposées à d'autres endroits sur l'entrevous, et notamment au niveau des faces sensiblement planes de chaque compartiment, mais également au niveau des faces inclinées entre deux compartiments.Such thicker areas may also be disposed of to others places on the interjoists, and particularly at the level of the substantially plane faces of each compartment, but also at the level of the inclined faces between two compartments.

De manière avantageuse, les compartiments sont ouverts sur la face inférieure de l'entrevous pour permettre de réaliser un gain de place important lors de leur stockage et de leur acheminement sur un chantier notamment. En effet, il est alors possible de les empiler les uns au dessus des autres de manière à réduire leur encombrement. Advantageously, the compartments are open on the face bottom of the interjoists to allow to save a lot of space when of their storage and their routing on a building site in particular. Indeed, he It is then possible to stack them one above the other so as to reduce their size.

L'entrevous peut également comporter à chacune des extrémités de sa plus grande dimension des agencements de forme complémentaire pour permettre un aboutage continu entre deux entrevous consécutifs. En effet, pour permettre le transport et la manutention des entrevous sur les chantiers, il est préférable d'utiliser des entrevous de longueur réduite. De par la superposition des extrémités de deux entrevous consécutifs, on évite alors au béton liquide de s'échapper au niveau du raccord entre deux entrevous successifs.The interjoists can also have at each end of his plus large dimension of complementary shape arrangements to allow a continuous splicing between two consecutive interjoists. Indeed, to allow the transport and handling of interjoin on construction sites, it is preferable to use intervous of reduced length. By the superposition of the extremities two consecutive interjoists, liquid concrete is then prevented from escaping level of the connection between two successive interjoists.

Pour résister au poids du béton liquide qu'il doit coffrer, l'entrevous doit présenter une certaine résistance. Cependant, il doit également répondre à la contrainte de légèreté pour permettre une manutention aisée sur le chantier et surtout pour éviter d'alourdir la structure du plancher. Ainsi, il a été établi qu'un bon compromis était obtenu avec des parois dont l'épaisseur est au plus égale à dix millimètres.To resist the weight of the liquid concrete that it must form, the interjoists must have some resistance. However, he must also answer the lightweight constraint to allow easy handling on site and especially to avoid weighing down the floor structure. Thus, it has been established that good compromise was obtained with walls whose thickness is at most equal to ten millimeters.

Afin d'augmenter la rigidité de la face supérieure de l'entrevous, il est possible de la pourvoir de nervures de renforcement.In order to increase the rigidity of the upper face of the interjoists, it is possible to provide reinforcing ribs.

L'espace entre deux poutrelles pouvant varier dans certains cas de figures, il est alors nécessaire de découper longitudinalement l'entrevous, ce qui génère une ouverture latérale des compartiments le constituant. Il est alors possible de munir cette face latérale ouverte d'un opercule, jouant le rôle d'interface avec la base de fixation de la poutrelle et s'étendant selon la même direction.The space between two beams can vary in certain cases of figures, it it is then necessary to cut longitudinally the interjoists, which generates a lateral opening of the compartments constituting it. It is then possible to provide this open lateral face of a lid, acting as an interface with the base of fixing the beam and extending in the same direction.

Avantageusement, l'opercule comporte une section transversale sensiblement en forme de "Z". Cette configuration permet de réaliser la fonction de coffrage, mais également d'assurer le guidage de l'entrevous entre les deux poutrelles.Advantageously, the lid has a cross section substantially Z-shaped. This configuration makes it possible to perform the function of formwork, but also to ensure the guidance of the interjoists between the two beams.

En pratique, l'opercule peut être inséré par clipsage sur la face découpée de l'entrevous, et selon la taille de l'entrevous utilisé, il est possible d'adapter la hauteur de l'opercule par découpage d'une portion le constituant ou bien par coulissement d'une pièce par rapport à une autre. En effet, l'opercule possède une partie sécable afin de s'adapter aux différentes configurations possibles. In practice, the lid can be inserted by clipping on the cut face of the interjoists, and according to the size of the interjoists used, it is possible to adapt the height of the lid by cutting a portion constituting it or by sliding of one piece relative to another. Indeed, the operculum has a breakable part to adapt to different configurations possible.

Chaque entrevous d'extrémité est muni d'une pièce d'about pour réaliser le coffrage total jusqu'aux murs. On utilise donc deux abouts par travée qui peuvent coulisser sous une portion de l'entrevous afin de s'adapter parfaitement à la longueur de chaque travée.Each end interjoist is provided with a piece of end to achieve the total formwork to the walls. So we use two ends per bay that can slide under a portion of the interjoists to perfectly fit the length of each span.

De plus, une portion relativement large de l'about, au niveau de la zone de contact avec le mur, est également apte à être découpée afin de s'adapter dans le cas où le mur n'est pas perpendiculaire à la direction des travées.In addition, a relatively large portion of the tip, at the level of the contact with the wall, is also able to be cut in order to fit into the where the wall is not perpendicular to the direction of the spans.

Le matériau utilisé pour un tel entrevous peut être un matériau composite à base de fibres ou de particules naturelles et d'une colle. Les fibres ou particules naturelles peuvent alors être choisies parmi le bois, le lin et le chanvre notamment.The material used for such interjoists can be a composite material to base of fibers or natural particles and glue. Fibers or particles Naturals can then be chosen from wood, flax and hemp in particular.

Avantageusement en pratique, les opercules et les abouts rapportés peuvent également être réalisés dans le même matériau que l'entrevous lui même.Advantageously in practice, the lids and abouts reported can also be made in the same material as the interjois itself.

Description sommaire des figuresBrief description of the figures

La manière de réaliser l'invention ainsi que les avantages qui en découlent ressortiront bien de la description du mode de réalisation qui suit, donné à titre indicatif mais non limitatif, à l'appui des figures annexées dans lesquelles :

  • la figure 1 est une vue en perspective générale de l'entrevous disposé entre deux poutrelles, conformément à l'invention ;
  • La figure 2 est une vue latérale d'un entrevous conforme à l'invention ;
  • la figure 3 est une vue du dessus d'un entrevous conforme à l'invention ;
  • la figure 4 est une vue en section transversale d'un entrevous au niveau de sa nervure, conformément à l' invention ;
  • la figure 5 est une vue en perspective de l'entrevous muni d'un opercule, conformément à l'invention, dont la figure 6 est une vue du dessus ;
  • les figures 7 et 8 sont des vues en section transversale de deux types d'opercule, conformément à l'invention ;
  • la figure 9 est une vue en section longitudinale de l'entrevous muni d'un about.
The manner of carrying out the invention as well as the advantages derived therefrom will emerge from the description of the embodiment which follows, given by way of indication but without limitation, in support of the appended figures in which:
  • Figure 1 is a general perspective view of the interjois arranged between two beams, according to the invention;
  • Figure 2 is a side view of a interlock according to the invention;
  • Figure 3 is a top view of a interjoists according to the invention;
  • Figure 4 is a cross-sectional view of a interjoists at its rib, according to the invention;
  • Figure 5 is a perspective view of the interjoists provided with a cap, according to the invention, Figure 6 is a view from above;
  • Figures 7 and 8 are cross-sectional views of two types of cap, according to the invention;
  • Figure 9 is a longitudinal sectional view of the interjoists provided with a tip.

Manière de réaliser l'inventionWay of realizing the invention

Comme déjà évoqué, l'invention concerne un entrevous moulé à parois minces apte à être disposé entre deux poutrelles à treillis métallique et à reposer sur la base de fixation desdites poutrelles.As already mentioned, the invention relates to a wall-molded interjoists thin slats able to be arranged between two trusses with wire mesh and to be laid down on the base of fixing said beams.

Tel que représenté à la figure 1, l'entrevous (1) comporte une pluralité de compartiments (5) séparés par des nervures (6). Selon une caractéristique de l'invention, chacune de ces nervures (6) est munie d'une zone de moindre résistance (18), typiquement constituée par un amincissement, et propre à permettre la sécabilité de l'entrevous au niveau de ladite nervure, donc en un ou plusieurs lots de compartiments (5).As shown in FIG. 1, the interjoists (1) comprise a plurality of compartments (5) separated by ribs (6). According to a characteristic of the invention, each of these ribs (6) is provided with a zone of less resistor (18), typically constituted by a thinning, and suitable for to allow the splitting of the interjoists at the level of said rib, therefore in one or several lots of compartments (5).

L'entrevous (1) est disposé entre deux poutrelles (2) à treillis métallique (3). Il repose sur la face supérieure (8) de la base de fixation (4) desdites poutrelles (2).The interjoists (1) is arranged between two trusses (2) with wire mesh (3). It rests on the upper face (8) of the fixing base (4) of said beams (2).

Conformément à l'invention, la surface de contact entre l'entrevous (1) et la base de fixation (4) est discontinue sur au moins l'un des côtés d'appui de l'entrevous (1) sur la poutrelle (2).According to the invention, the contact surface between the interjoists (1) and the fixing base (4) is discontinuous on at least one of the support sides of interjoists (1) on the beam (2).

Cette discontinuité de contact s'opère au niveau des extrémités des nervures (6). En effet, les nervures (6) possèdent une longueur inférieure à celle des compartiments (5), de telle sorte à ne jamais venir reposer sur la face supérieure (8) de la base de fixation (4).This discontinuity of contact occurs at the ends of the ribs (6). Indeed, the ribs (6) have a length less than that of the compartments (5), so that they never come to rest on the upper surface (8) of the fastening base (4).

Tel que représenté en figure 2, un décrochement vertical (7) au niveau d'au moins une extrémité de chacune des nervures (6), se prolonge en dessous de la face supérieure (8) de la base de fixation (4) de chaque poutrelle (2). Cette configuration permet alors de réaliser un guidage lors de la mise en place de l'entrevous (1) entre deux poutrelles (2). Ce guidage est effectué au niveau des faces latérales (9), les deux poutrelles (2) se faisant face. Ainsi, la mise en place des entrevous (1) entre deux poutrelles (2) ne peut être gênée par le treillis métallique (3) émergeant de la base de fixation (4) des poutrelles (2). As represented in FIG. 2, a vertical recess (7) at at least one end of each of the ribs (6) extends below the face upper (8) of the fastening base (4) of each beam (2). This configuration allows then to carry out guidance during the implementation of interjoists (1) between two beams (2). This guidance is carried out at the level of side faces (9), the two beams (2) facing each other. So, setting up interjoists (1) between two beams (2) can not be hindered by the trellis metal (3) emerging from the fixing base (4) of the beams (2).

Pour faciliter le transport et le stockage des entrevous (1), il peut être avantageux que la face inférieure soit évidée de manière à créer des compartiments (5) ouverts sur la face inférieure ou concave. De cette manière, il est possible d'empiler les entrevous (1) les uns au dessus des autres et ainsi réduire leur encombrement.To facilitate the transport and storage of interjoists (1), it can be advantageous that the lower face is hollowed out so as to create compartments (5) open on the underside or concave. In this way, it is possible stack interjoists (1) one above the other and thus reduce their footprint.

Pour permettre d'augmenter leur rigidité, il peut s'avérer avantageux, tel que représenté à la figure 3, de munir la face supérieure de chaque compartiment (5) d'une nervure de renforcement (15).To increase their rigidity, it may be advantageous, as represented in FIG. 3, to provide the upper face of each compartment (5) a reinforcing rib (15).

En pratique, l'entrevous (1) comporte à chaque extrémité de sa plus grande dimension des agencements (11, 12) de forme complémentaire, susceptibles de coopérer les uns avec les autres, pour permettre un aboutage continu entre deux entrevous (1). Cette configuration permet de réaliser un coffrage total d'un plancher et évite ainsi au béton liquide, lors de la coulée, de s'échapper par des interstices entre deux entrevous (1). Elle évite également à un opérateur de réaliser un colmatage au niveau des différents raccords.In practice, the interjoists (1) has at each end of its largest dimension of arrangements (11, 12) of complementary shape, capable of cooperate with each other, to allow continuous splicing between two interjoin (1). This configuration makes it possible to form a total of one floor and thus prevents liquid concrete, during casting, from escaping through interstices between two interjoists (1). It also prevents an operator from realizing clogging at the different connections.

Un bon compromis entre les contraintes de résistance mécanique et de légèreté a été obtenu en utilisant des entrevous (1), dont l'épaisseur des parois est au plus égale à dix millimètres.A good compromise between the constraints of mechanical resistance and lightness was obtained using interjoists (1), whose wall thickness is at most equal to ten millimeters.

Tel que représenté en figure 4, l'entrevous (1) présente, au niveau de ses décrochements verticaux (7), des zones (10) renforcées, aptes à soutenir un faux-plafond ou des canalisations.As shown in FIG. 4, the interjoists (1) present, at its vertical recesses (7), zones (10) reinforced, able to support a false ceiling or pipes.

Des zones (14) renforcées peuvent également être disposées sur les parois latérales inclinées (13) des compartiments (5). Ces zones renforcées (10, 14), donc plus épaisses, peuvent avoir la forme de bossages pré-percés, permettant d'introduire des éléments de fixation tels que des clips, pour maintenir en position un câble ou une gaine, ou des tiges filetées pour permettre la mise en place d'un faux-plafond notamment. Reinforced zones (14) can also be arranged on the walls inclined sides (13) of the compartments (5). These reinforced areas (10, 14), therefore thicker, may have the shape of pre-drilled bosses, allowing to introduce fastening elements such as clips, to maintain in position a cable or sheath, or threaded rods to allow the installation of a false ceiling in particular.

Lorsque l'entraxe entre deux poutrelles (2) est réduit et tel que représenté en figures 5 et 6, il est alors nécessaire de découper les entrevous (1) dans le sens de la longueur à la dimension appropriée. Un opercule (16) est alors inséré sur la face découpée de l'entrevous (1), de manière à réaliser le guidage du coté de l'entrevous (1) qui a été découpé, mais aussi de refermer le ou les compartiments (5) ouverts sur cette face, afin d'assurer le coffrage sans risque d'introduction de béton sous l'entrevous.When the spacing between two beams (2) is reduced and as represented in Figures 5 and 6, it is then necessary to cut the interjoists (1) in the direction of the length to the appropriate dimension. A cover (16) is then inserted on the face cut out of the interjoists (1), so as to carry out the guidance of the side of the interjoists (1) which has been cut, but also to close the compartment or compartments (5) open on this face, to ensure the formwork without the risk of introducing concrete under the interjoists.

La section des opercules (16) présente une forme de "Z" tel que représenté en figure 8. Ces opercules peuvent en outre être monoblocs. Dans ce cas l'opercule (16) est découpé dans le sens de sa longueur pour s'adapter aux configurations spécifiques à chaque chantier.The section of the covers (16) has a shape of "Z" as shown in Figure 8. These lids can further be monoblocks. In this case the operculum (16) is cut in the direction of its length to adapt to the configurations specific to each site.

Tel que représenté en figure 7, l'opercule (16) peut également être composé de deux pièces (19, 20) aptes à permettre la réalisation d'un réglage en fonction de la hauteur de l'entrevous (1) utilisé.As shown in FIG. 7, the cover (16) can also be composed two pieces (19, 20) adapted to allow the realization of an adjustment according to the height of the interjoists (1) used.

Tel que représenté en figure 9, l'entrevous (1) peut être muni d'un about (17) pour réaliser le coffrage total jusqu'au mur. Deux abouts (17) sont donc rapportés sur chaque travée et peuvent coulisser sous une portion de l'entrevous (1) d'extrémité afin de s'adapter parfaitement à la longueur des travées.As shown in FIG. 9, the interjoists (1) may be provided with a (17) to complete the formwork to the wall. Two abouts (17) are therefore reported on each span and can slide under a portion of the interjoists (1) end to fit perfectly the length of the spans.

De plus, une portion relativement large de l'about (17), au niveau de la zone de contact avec le mur, est également apte à être découpée afin de permettre son adaptation dans le cas où le mur n'est pas perpendiculaire à la direction des travées, et corollairement, éviter tout risque d'introduction de béton sous l'entrevous.In addition, a relatively large portion of the tip (17) at the level of the zone contact with the wall, is also able to be cut to allow its adaptation in the case where the wall is not perpendicular to the direction of the spans, and corollary, avoid any risk of introduction of concrete under the interjoists.

En pratique, l'entrevous (1) est réalisé en un matériau composite à base de fibres naturelles et d'une colle. Avantageusement, les fibres naturelles choisies font partie du groupe du bois, du lin et du chanvre.In practice, the interjoists (1) is made of a composite material based on natural fibers and glue. Advantageously, the selected natural fibers make part of the group of wood, flax and hemp.

Il ressort de ce qui précède qu'un entrevous conforme à l'invention présente de multiples avantages, notamment :

  • il permet de réaliser un coffrage total d'un plancher à la fois rapide à mettre en oeuvre, compte tenu notamment de la sécabilité des compartiments en l'absence de tout outil, et ne présentant aucune face ouverte susceptible de permettre au béton liquide de s'échapper ;
  • il permet de fournir une solution très flexible pour la mise en place d'éléments de fixation ;
  • il permet de s'adapter à toutes les configurations présentes sur les chantiers.
It follows from the foregoing that a interjoists according to the invention have many advantages, in particular:
  • it allows to realize a total formwork of a floor at once fast to implement, taking into account in particular the securability of the compartments in the absence of any tool, and having no open face likely to allow the liquid concrete of s to escape;
  • it provides a very flexible solution for the establishment of fasteners;
  • it allows to adapt to all the configurations present on the building sites.

Claims (12)

Entrevous (1) moulé à parois minces, destiné à être disposé entre deux poutrelles (2) à treillis métallique (3) et à reposer sur la base de fixation (4) desdites poutrelles (2) afin de réaliser le coffrage d'une table de compression d'un plancher, ledit entrevous (1) comportant une pluralité de compartiments (5) séparés deux à deux par une nervure (6), la longueur de chaque nervure (6) étant inférieure à la longueur des compartiments (5), de telle sorte à ne jamais prendre appui sur la base de fixation (4) des poutrelles (2), caractérisé en ce que chacune des nervures (6) est munie d'au moins une zone de moindre résistance, de telle sorte à permettre la sécabilité de l'entrevous entre deux compartiments adjacents (5) en l'absence de tout outil.Thin-walled molded interjoists (1) intended to be arranged between two trusses (2) with wire mesh (3) and to rest on the fastening base (4) of said trusses (2) in order to form the formwork of a table compression of a floor, said interjoists (1) having a plurality of compartments (5) separated in pairs by a rib (6), the length of each rib (6) being less than the length of the compartments (5), so as never to bear on the fixing base (4) of the beams (2), characterized in that each of the ribs (6) is provided with at least one zone of least resistance, so as to allow the splitting of interjoists between two adjacent compartments (5) in the absence of any tool. Entrevous selon la revendication 1, caractérisé en ce qu'il est muni d'un about (17), destiné à permettre la réalisation totale du coffrage de la table de compression du plancher.Interlocking according to claim 1, characterized in that it is provided with an end (17) intended to allow the total completion of the formwork of the floor compression table. Entrevous selon la revendication 2, caractérisé en ce que l'about (17) est apte à coulisser sous une portion de l'entrevous (1).Interlocking according to claim 2, characterized in that the end (17) is slidable under a portion of the interjoists (1). Entrevous selon la revendication 2, caractérisé en ce que l'about (17) est adaptable à différentes dimensions d'entrevous (1).Interlocks according to claim 2, characterized in that the end (17) is adaptable to different dimensions of interjoists (1). Entrevous selon l'une des revendications 1 à 4, caractérisé en ce qu'il comporte au niveau d'au moins une extrémité de chacune des nervures (6), un décrochement vertical (7) se prolongeant en dessous de la face supérieure (8) de la base de fixation (4) de chaque poutrelle (2), apte à venir en contact avec l'une des faces latérales (9) de la dite base de fixation (4).Interveilles according to one of claims 1 to 4, characterized in that it comprises at least one end of each of the ribs (6), a vertical recess (7) extending below the upper face (8). ) of the fastening base (4) of each beam (2), adapted to come into contact with one of the lateral faces (9) of said fastening base (4). Entrevous selon la revendication 5, caractérisé en ce que les décrochements verticaux (7) présentent des zones renforcées (10) sensiblement parallèles à la face supérieure (8) de la base de fixation (4) des poutrelles (2), et destinées à permettre la fixation de faux-plafond ou de canalisations.Interlocking according to claim 5, characterized in that the vertical recesses (7) have reinforced areas (10) substantially parallel to the upper face (8) of the fixing base (4) of the beams (2), and intended to allow the fixing of false ceilings or pipes. Entrevous selon l'une des revendications 1 à 6, caractérisé en ce que les compartiments (5) sont ouverts sur une face. Entrevous according to one of claims 1 to 6, characterized in that the compartments (5) are open on one side. Entrevous selon l'une des revendications 1 à 7, caractérisé en ce qu'il comporte à chaque extrémité de sa plus grande dimension des agencements (11, 12) de formes complémentaires pour permettre un aboutage continu entre deux entrevous (1) consécutifs.Interlock according to one of claims 1 to 7, characterized in that it comprises at each end of its largest dimension arrangements (11, 12) of complementary shapes to allow continuous splicing between two interjoists (1) consecutive. Entrevous selon l'une des revendications 1 à 8, caractérisé en ce que sa face supérieure, destinée à être en contact avec le béton, comporte des nervures de renforcement (15).Interlocking according to one of claims 1 to 8, characterized in that its upper face, intended to be in contact with the concrete, comprises reinforcing ribs (15). Entrevous selon l'une des revendications 1 à 9, caractérisé en ce qu'il est muni d'un opercule (16) rapporté jouant le rôle d'interface avec la base de fixation (4) de la poutrelle (2), et s'étendant dans la même direction que ladite poutrelle (2).Interlocking according to one of Claims 1 to 9, characterized in that it is provided with an insert (16) serving as an interface with the fixing base (4) of the beam (2), and extending in the same direction as said beam (2). Entrevous selon l'une des revendications 1 à 10, caractérisé en ce qu'il est réalisé en un matériau composite à base de fibres ou particules naturelles et d'une colle.Interlock according to one of claims 1 to 10, characterized in that it is made of a composite material based on natural fibers or particles and an adhesive. Entrevous selon la revendication 11, caractérisé en ce que les fibres ou particules naturelles sont choisies dans le groupe comprenant le bois, le lin et le chanvre.Interlocks according to claim 11, characterized in that the natural fibers or particles are selected from the group consisting of wood, flax and hemp.
EP04103549A 2003-07-31 2004-07-23 Interlocking moulded formwork Expired - Lifetime EP1512803B1 (en)

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FR0309455A FR2858343B1 (en) 2003-07-31 2003-07-31 EMBOITABLE MOLDING
FR0309455 2003-07-31

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AT (1) ATE347639T1 (en)
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FR2919317A1 (en) * 2007-07-26 2009-01-30 Imerys Tc Soc Par Actions Simp Thin wall light weight structural floor unit for forming formwork element of reinforced concrete screed, has edges with regions defined by horizontal and vertical flanges, where horizontal flange is supported against upper arris of heel
FR2944816A1 (en) * 2009-04-28 2010-10-29 Jean Louis Gaziello Variable spacing slab for use between two beams of floor formwork structure on building site, has transverse edge equipped with support face over its length, where face is turned on side opposite to bottom of concave face of thin wall
FR2948706A1 (en) * 2009-07-31 2011-02-04 Kp1 MODULAR INTERVIEW
CN103452219A (en) * 2013-09-16 2013-12-18 南京工业大学 Honeycomb steel hidden beam composite floor system
CN103572875A (en) * 2013-11-05 2014-02-12 南京工业大学 Steel box hidden beam composite floor system
CN103993691A (en) * 2014-04-27 2014-08-20 绍兴精工绿筑集成建筑系统工业有限公司 Integrated floor module and assembling method thereof

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ITPD20040087A1 (en) * 2004-04-01 2004-07-01 Assounisol Srl PREFABRICATED MODULAR ELEMENT FOR THE REALIZATION OF LIGHTENINGS IN SLABS WITH LATERAL BEAMS OR PREDALLE SHEETS
ATE541099T1 (en) * 2005-06-23 2012-01-15 Plasticform S R L FILLING AND INSULATING ELEMENT AND CONSTRUCTION SYSTEM WITH SUCH AN ELEMENT
FR2916215B1 (en) * 2007-05-14 2009-07-10 Kp1 Soc Par Actions Simplifiee INJECTED PLASTIC MATERIALS
FR2916212B1 (en) * 2007-05-15 2013-12-13 Rector Lesage INSULATION DEVICE FOR FLOOR FLOORS AND FLOOR OBTAINED
ITPD20070347A1 (en) * 2007-10-22 2009-04-23 Geoplast Spa REUSABLE MODULAR FORMWORK FOR THE CONSTRUCTION OF CURED FLOORS OF C. A.
FR2956421B1 (en) 2010-02-12 2012-08-10 Rector Lesage CONVEYORS FOR FLOOR FLOORS
FR2961226A1 (en) * 2010-06-15 2011-12-16 Applic Composants Guiraud Freres Soc Et IMPROVEMENT IN HOURDIS MOULES
FR3099503B1 (en) 2019-08-02 2023-01-06 Lesage Dev Method for installing formwork spacers for floor joists and corresponding formwork spacers

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2919317A1 (en) * 2007-07-26 2009-01-30 Imerys Tc Soc Par Actions Simp Thin wall light weight structural floor unit for forming formwork element of reinforced concrete screed, has edges with regions defined by horizontal and vertical flanges, where horizontal flange is supported against upper arris of heel
FR2944816A1 (en) * 2009-04-28 2010-10-29 Jean Louis Gaziello Variable spacing slab for use between two beams of floor formwork structure on building site, has transverse edge equipped with support face over its length, where face is turned on side opposite to bottom of concave face of thin wall
FR2948706A1 (en) * 2009-07-31 2011-02-04 Kp1 MODULAR INTERVIEW
EP2309071A1 (en) * 2009-07-31 2011-04-13 Kp1 Modular structural floor unit
CN103452219A (en) * 2013-09-16 2013-12-18 南京工业大学 Honeycomb steel hidden beam composite floor system
CN103572875A (en) * 2013-11-05 2014-02-12 南京工业大学 Steel box hidden beam composite floor system
CN103993691A (en) * 2014-04-27 2014-08-20 绍兴精工绿筑集成建筑系统工业有限公司 Integrated floor module and assembling method thereof

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FR2858343A1 (en) 2005-02-04
ES2276227T3 (en) 2007-06-16
FR2858343B1 (en) 2007-04-20
DE602004003531T2 (en) 2007-04-05
EP1512803B1 (en) 2006-12-06
DE602004003531D1 (en) 2007-01-18
ATE347639T1 (en) 2006-12-15

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