EP1749951A1 - Permanent formwork element and module for building such an element - Google Patents

Permanent formwork element and module for building such an element Download PDF

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Publication number
EP1749951A1
EP1749951A1 EP06118434A EP06118434A EP1749951A1 EP 1749951 A1 EP1749951 A1 EP 1749951A1 EP 06118434 A EP06118434 A EP 06118434A EP 06118434 A EP06118434 A EP 06118434A EP 1749951 A1 EP1749951 A1 EP 1749951A1
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EP
European Patent Office
Prior art keywords
module
spacer
panel
length
modules
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP06118434A
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German (de)
French (fr)
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EP1749951B1 (en
Inventor
Philippe Perrot
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tout pour l'Eau - Prat
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Tout pour l'Eau - Prat
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Priority claimed from FR0508322A external-priority patent/FR2889550B1/en
Application filed by Tout pour l'Eau - Prat filed Critical Tout pour l'Eau - Prat
Publication of EP1749951A1 publication Critical patent/EP1749951A1/en
Application granted granted Critical
Publication of EP1749951B1 publication Critical patent/EP1749951B1/en
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Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
    • E04H4/00—Swimming or splash baths or pools
    • E04H4/0075—Swimming or splash baths or pools made of concrete
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B2/00—Walls, e.g. partitions, for buildings; Wall construction with regard to insulation; Connections specially adapted to walls
    • E04B2/84—Walls made by casting, pouring, or tamping in situ
    • E04B2/86—Walls made by casting, pouring, or tamping in situ made in permanent forms
    • E04B2/8623—Walls made by casting, pouring, or tamping in situ made in permanent forms with spacers and at least one form leaf being monolithic
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B2/00—Walls, e.g. partitions, for buildings; Wall construction with regard to insulation; Connections specially adapted to walls
    • E04B2/84—Walls made by casting, pouring, or tamping in situ
    • E04B2/86—Walls made by casting, pouring, or tamping in situ made in permanent forms
    • E04B2/8647—Walls made by casting, pouring, or tamping in situ made in permanent forms with ties going through the forms
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B2/00—Walls, e.g. partitions, for buildings; Wall construction with regard to insulation; Connections specially adapted to walls
    • E04B2/84—Walls made by casting, pouring, or tamping in situ
    • E04B2/86—Walls made by casting, pouring, or tamping in situ made in permanent forms
    • E04B2002/867—Corner details

Definitions

  • the present invention relates to the technical field of masonry concrete pool walls.
  • each lost formwork element by assembling two identical modules made of plastic material. Each module then comprises a rectangular panel having a front face and a reverse side and a series of half-spacers distributed on the back side of the panel extending perpendicularly to the panel. In order to allow an assembly of the two modules together, each half-spacer comprises, at its distal end, a male and / or female interlocking element intended to engage in a complementary interlocking element of a half -entretoise corresponding. Finally, the irreversibility of the assembly is obtained by welding the two half-spacers at the interlocking elements.
  • Such a piece of lost formwork has the disadvantage of imposing a weld at each junction between the half-spacers.
  • this welding can be achieved only manually, which induces a relatively high manufacturing cost.
  • it is not possible to guarantee perfect reproducibility of the welds so that the latter do not always have optimum strength and may yield during the injection of the concrete into the formwork element, which induces structural disorders in the wall in progress.
  • the lost formwork element is likely to deform locally under pressure. concrete so that the resulting wall does not have a perfect flatness.
  • this module is characterized in that at least some of the half-spacers comprise a proximal bore which is intended to receive an assembly screw and which opens at the front face of the panel.
  • the invention also relates to a lost formwork element for producing a pool wall which comprises two identical modules according to the invention nested one inside the other at their half-spacers and assembled by a series of screws. engaged in proximal bores of nested half-spacers.
  • the implementation of the screws, for assembling the constituent modules of the lost formwork element makes it possible to obtain a lost formwork element having a very high mechanical strength and in particular a high rigidity of its panels preventing any deformation of these elements. last under the effect of concrete pressure.
  • the screw connection can be achieved without other tools that a screwdriver or an electric screwdriver while offering a very high quality of assembly so that the assembly of the modules can be performed by a poorly qualified staff, even by the end user of the lost formwork element who can be a simple handyman.
  • the implementation of a screw connection makes it possible to envisage delivery of the unassembled modules, which allows a reduction in the selling price but also the storage volume of the modules before implementation and assembly.
  • half-spacers may have a proximal bore.
  • all the half-struts will have a proximal bore.
  • the proximal bore extends over only a portion of the length of the half-spacer.
  • each half-spacer comprising a proximal bore comprises a distal bore which is coaxial with the proximal bore and which opens at the distal end of the half-spacer.
  • the proximal bore has a length less than or equal to one quarter of the length of the half-spacer measured between its distal end and the back side of the panel while the distal bore has a length less than or equal to half of the length of the half-spacer and greater than one quarter of the length of the half-spacer.
  • a portion of the wall of the distal bore is intended to form a hooking zone for the thread of an assembly screw. This feature of the invention reduces the forces required for screwing while ensuring the effectiveness of the anchoring of the net.
  • the distal bore has a proximal portion whose diameter is greater than the maximum diameter of the thread of the screw. assembly and a distal portion whose diameter is smaller than the maximum diameter of the thread of the assembly screw.
  • the proximal bore has a proximal portion whose diameter is greater than the maximum diameter of the thread of the assembly screw and a distal portion whose diameter is smaller than the maximum diameter of the thread of the screw. assembly.
  • each half-spacer comprises three ribs located at 120 ° others and a rib is oriented towards an upper edge of the module, the ribs of the half-spacer being intended to strengthen the latter and to ensure a breeze breaker function and deflector during the casting of concrete.
  • the front face of the panel of each module comprises at least one cutting line for to guide a user for a panel cut of the module.
  • the half-spacers are then preferably arranged so as not to be on a cutting path defined by a cutting line.
  • the front face of the panel comprises at least one cutting line located nearby. a side edge of the panel and intended after cutting the panel to define a concrete passage opening between two shuttering elements forming a right angle.
  • the lateral edges as well as the upper and lower edges of the panel comprise interlocking means intended to allow the interlocking of two adjacent or superposed formwork elements.
  • a module according to the invention can be made of any suitable material and preferably, in order to reduce its weight and its manufacturing cost, it will be made of injected plastic such as for example polypropylene or polyethylene.
  • the invention also relates to a lost formwork element obtained by assembling, by means of screws, identical modules according to the invention.
  • the small modules are obtained by cutting a large module.
  • each spacer comprises, on the one hand, near an edge a series of holes for the implementation of screws on a small first module and on the other hand, a series of horizontal elongate windows for the establishment of fixing screws on a second module of small size allowing a continuous adjustment of the distance between the spacers. two edges facing the two neighboring small modules.
  • each spacer comprises at least one line of graduations placed over an elongated window to form reference marks. adjusting the spacing between two neighboring small modules.
  • each spacer comprises at least two slots for the establishment of a template for defining the spacing of two neighboring small modules.
  • each spacer comprises at least two series of horizontally aligned holes intended to receive fixing screws and to allow an adjustment of the spacing between small modules.
  • the two modules are assembled by means of screws which each have a length greater than 1.3 times the length of a half-spacer with an unthreaded portion, which is heard from the head of the screw over a length greater than or equal to the length of a half-spacer and having beyond the unthreaded portion a self-tapping thread and whose self-tapping thread is engaged in the wall of a distal bore and / or in the solid area of the half-spacer of the module located opposite the head of the screw.
  • the heads of the assembly screws are preferably all located on the face of the same module.
  • each assembly screw does not open into the proximal bore of the corresponding half-spacer.
  • modules or lost formwork elements according to the invention can be implemented with each other in different combinations when they are not exclusive of each other.
  • Fig. 1 is a cross section of a lost formwork element according to the invention.
  • Fig. 2 is a perspective in front view of a module for producing the lost formwork element illustrated in FIG. 1.
  • Fig. 3 is a side perspective view of the module shown in FIG. 2.
  • Fig. 4 is a perspective of a curved formwork element according to the invention.
  • Figs. 5 and fig. 6 are partial views showing details of mounting a curved formwork element according to the invention obtained from the assembly of a large module and small modules of the invention.
  • Fig. 7 is a partial section along the plane VII-VII of FIG. 4, of the curved formwork element illustrated in FIG. 4 .
  • a lost formwork element according to the invention as illustrated in FIG. 1 and designated as a whole by the reference 1 has a generally parallelepipedal general shape.
  • the lost formwork element 1 is intended to be associated with other identical elements to define, for example, the formwork of a vertical wall of a swimming pool.
  • the lost formwork elements 1 are then nested in each other vertically and laterally depending on the height and the desired wall length.
  • Each shuttering element 1 is obtained by assembling two identical modules 2 made of injected plastic material. As shown more particularly in FIGS. 2 and 3, each module 2 comprises a rectangular panel 3 which has a front face 4 visible in FIG. 2 and a reverse side 5 visible in FIG. 3.
  • the panel 3 has at its upper edges 6 and lower 7 interlocking means which, according to the illustrated example, comprise, on the one hand, at the the lower edge 7 a series of tabs 8 separated from each other by notches 9 and other on the upper edge 6 a series of fingers 10 extending perpendicular to the back side 5 being aligned with the indentations 9.
  • the fingers 10 are separated from each other by a distance d substantially equal to the thickness e of a lost formwork element 1.
  • the panel 3 is as interlocking means at its side edges 11 and left Law 12 a lateral tongue 13 located in the lower part of the left edge 11 and in the upper part of the right edge 12. It should be noted that the lateral tongues 13 also assume a function of limiting seepage of concrete at the junction of two formwork elements.
  • each panel 3 comprises a series of half-spacers 20 distributed on the back side 5 while extending perpendicularly to the panel 3.
  • Each half-spacer 20 has at its distal end, opposite the panel 3, a male and / or female interlocking element 21 intended to engage in a complementary interlocking element. corresponding half-spacer when assembling two modules 2.
  • the half-spacers 20 are arranged in four rows parallel to the upper edge 6 of the panel 3 and the half-spacers of the same rank present alternately at their distal ends a male conformation and a female conformation so as to avoid errors in the assembly of two identical modules 2.
  • the half-spacers 20 are arranged symmetrically with respect to a median plane P perpendicular to the panel 3.
  • each half-spacer 20 comprises a proximal bore 22 which is intended to receive an assembly screw V and which opens out at the front face. 4 of the panel 3.
  • the bore 22 is called proximal because of its position relative to the panel 3.
  • the bore 22 does not extend over the entire length l of the half-spacer 20 so that it is not crossing.
  • the proximal bore 22 has a length l 22 less than or equal to a quarter of the length l of the half-spacer 20.
  • an excessive thickness of half-spacer 20 also has a distal bore 23 which is coaxial with the proximal bore 22 and which opens out at the distal end of the half-spacer 20.
  • the distal bore 23 does not open into the distal bore 23 .
  • proximal bore 22 so that it is separated from the latter by a solid zone 24.
  • the distal bore 23 has a length l 23 less than or equal to half the length l of the half-spacer 20 and greater than one quarter of the length l of the half-spacer 20.
  • two identical modules 2 are used as described above.
  • the half-spacers 20 of the two modules are nested one inside the other at their distal end, and then an assembly screw V is engaged at each of the proximal bores 22 of the front face 4 of one of the two modules. 2 so that the front face of the other module provides a substantially smooth surface adapted to receive a sealing coating.
  • Each assembly screw V will be chosen so as to have a length l V greater than 1.3 times and preferably equal to 1.5 times the length of a half-spacer l with a non-threaded portion extending from the head of the screw to a length greater than or equal to the length of a half-spacer l .
  • Each assembly screw V will furthermore have beyond the unthreaded portion a self-tapping thread.
  • the proximal bore 22 has close to its bottom a catching area for the thread of the assembly screw V.
  • the proximal bore 22 will be made to have a proximal portion whose diameter is greater than the maximum diameter of the thread of the assembly screw and a distal portion whose diameter is smaller than the maximum diameter of the thread of the assembly screw V.
  • part of the wall of the distal bore 23 is intended to form a fastening zone for the thread of the assembly screw V .
  • the distal bore 23 then has a proximal portion whose diameter is greater than the maximum diameter of the cap screw thread and a distal portion having a diameter less than the maximum thread diameter of the screw assembly.
  • the thread of the assembly screw is hooked into the distal portion of smaller diameter of the distal bore 23 of the half-spacer 20 located opposite the head of the assembly screw V.
  • the presence of a larger diameter portion at the bores 23 reduces the effort required to install each screw assembly V.
  • the lost formwork element 1 After the installation of all the assembly screws V, the lost formwork element 1 thus obtained has a particularly high mechanical strength and is therefore perfectly adapted to withstand the internal pressure exerted by the concrete during casting.
  • each half-spacer 20 is preferably reinforced by three ribs 25 located at 120 ° from each other and a rib is oriented towards an upper edge of the module.
  • the ribs of each half-spacer 20 then provide additional reinforcing function and during casting a guiding function, breeze motte and baffle concrete.
  • the back side 5 of the panel also has stiffening ribs 26 .
  • each module 2 has a series of cutting lines 30 to 33 intended to guide a user for a cutting the module panel.
  • the half-spacers are preferably arranged so as not to be on a cutting path defined by a cutting line.
  • the cutting line 30 allows the realization of an opening for the establishment of a part to be sealed for the reception of a submerged projector.
  • the cutting lines 31 allow the realization of an opening for the establishment of a suction mouth of the water.
  • the cutting lines 32 located near a side edge of the panel 3 are intended after cutting the panel to define a concrete passage opening between two shuttering elements forming a right angle.
  • the cutting lines 33 are intended to allow the realization of openings for the introduction of nozzles.
  • the lost formwork element 1 as described above and illustrated in FIG. 1 has a straight form more particularly for the realization of straight wall.
  • the modules according to the invention 2 can be used to produce a curved or curved lost formwork element 1c as illustrated in FIG. 4.
  • the curved formwork element 1c is obtained by assembling a large module 2 with small modules 2p according to the invention.
  • the large module then has a height H 2 and a length L p while each small module has a height H 2p substantially equal to the height H 2 and a length L 2p .
  • the curved formwork element 1c is formed by assembling a large module 2 with four small modules 2p obtained by cutting into four parts of a large module 2 , for example along the three lines 40 shown in phantom in FIG. 3.
  • the small size modules 2p are assembled with the large module 2 by interlocking the half-spacers 20 and screw connections as previously described.
  • the flexibility of the large module 2 is then used to curvage it and to confer on the inner face of the curved element 1c that it defines a shape concave, while the outer face, defined by the small modules 2p, will have a convex shape.
  • a spacer 41 is placed between two small modules 2p adjacent neighbors so that the curved formwork element 1c comprises, according to the illustrated example, three spacers 41.
  • Each spacer 41 then comprises close to the one of its vertical edges a series of holes 42 for receiving screws 43 for fixing the spacer 41 on a first small module 2p 1 as shown in Figs. 5 and 6.
  • Each spacer 41 further comprises a series of horizontal elongated windows 44 for the introduction of screws 45 for fixing the spacer 41 on a second small module 2p 2 adjacent the first small module 2p 1 .
  • the oblong shape of each window 44 allows a continuous adjustment of the spacing distance e between the two edges opposite two small modules 2p 1 and 2p 2 .
  • each spacer 41 comprises above the windows 44 a graduation line 46. Still in order to facilitate the adjustment of spacing and according to the illustrated example, the spacer 41 further comprises at least two slots 47 for engaging a template, not shown, between the edges of the two small modules 2p 1 and 2p 2 before tightening the screws 45.
  • the windows 44 allow a continuous adjustment of the spacing, it is also possible to provide two series 48 horizontally aligned holes for the establishment of fastening screws to keep apart small modules 2p neighbors.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Forms Removed On Construction Sites Or Auxiliary Members Thereof (AREA)
  • Moulds, Cores, Or Mandrels (AREA)

Abstract

The module has a set of semi-cross-bars (20) distributed on a back side (5) of a rectangular panel (3) by extending perpendicular to the panel. The semi-cross-bars are placed in four rows parallel to an upper edge of the panel. Each semi-cross-bar has a male and/or female embedding element at the level of its distal end for engagement in a complimentary embedding element of a corresponding semi-cross-bar during the assembly of the module with another module. The semi-cross-bars have a proximal bore (22) receiving an assembling screw and emerge out at the level of a front side (4) of the panel. An independent claim is also included for a permanent formwork element comprising two identical modules embedded with each other at the level of their semi-cross-bars and assembled by a set of screws engaged by a set of screws engaged in proximal bores of embedded semi-cross-bars.

Description

La présente invention concerne le domaine technique de la maçonnerie de parois de piscine en béton.The present invention relates to the technical field of masonry concrete pool walls.

Il est connu de réaliser des parois de piscine en béton armé en utilisant des éléments de coffrage perdu tels que décrits dans la demande de brevet FR 2 790 777 . Ainsi, il est proposé de réaliser chaque élément de coffrage perdu par l'assemblage de deux modules identiques en matière plastique. Chaque module comprend alors un panneau rectangulaire présentant une face recto et une face verso et une série de demi-entretoises réparties sur la face verso du panneau en s'étendant perpendiculairement au panneau. Afin de permettre un assemblage des deux modules entre eux, chaque demi-entretoise comprend, au niveau de son extrémité distale, un élément d'emboîtement mâle et/ou femelle destiné à s'engager dans un élément d'emboîtement complémentaire d'une demi-entretoise correspondante. Enfin, l'irréversibilité de l'assemblage est obtenue par soudure des deux demi entretoises au niveau des éléments d'emboîtement.It is known to produce reinforced concrete pool walls using lost formwork elements as described in the patent application. FR 2,790,777 . Thus, it is proposed to make each lost formwork element by assembling two identical modules made of plastic material. Each module then comprises a rectangular panel having a front face and a reverse side and a series of half-spacers distributed on the back side of the panel extending perpendicularly to the panel. In order to allow an assembly of the two modules together, each half-spacer comprises, at its distal end, a male and / or female interlocking element intended to engage in a complementary interlocking element of a half -entretoise corresponding. Finally, the irreversibility of the assembly is obtained by welding the two half-spacers at the interlocking elements.

Un tel élément de coffrage perdu présente l'inconvénient d'imposer une soudure au niveau de chaque jonction entre les demi-entretoises. Or, compte tenu de la répartition des demi-entretoises, cette soudure ne peut être réalisée que manuellement, ce qui induit un coût de fabrication relativement important. De plus, il n'est pas possible de garantir une parfaite reproductibilité des soudures de sorte que ces dernières ne présentent pas toujours une résistance optimale et sont susceptibles de céder lors de l'injection du béton dans l'élément de coffrage, ce qui induit des désordres structurels dans la paroi en cours de réalisation. Par ailleurs, si, afin de réduire les coûts de main-d'oeuvre, il est choisi de réaliser une soudure au niveau de certaines seulement des demi-entretoises, alors l'élément de coffrage perdu est susceptible de se déformer localement sous la pression du béton de sorte que la paroi obtenue ne présente pas une parfaite planéité.Such a piece of lost formwork has the disadvantage of imposing a weld at each junction between the half-spacers. However, given the distribution of the half-spacers, this welding can be achieved only manually, which induces a relatively high manufacturing cost. In addition, it is not possible to guarantee perfect reproducibility of the welds so that the latter do not always have optimum strength and may yield during the injection of the concrete into the formwork element, which induces structural disorders in the wall in progress. On the other hand, if, in order to reduce labor costs, it is chosen to weld at only some of the half-spacers, then the lost formwork element is likely to deform locally under pressure. concrete so that the resulting wall does not have a perfect flatness.

Ainsi, il est apparu le besoin d'un nouveau type de module pour la réalisation d'un élément de coffrage dont la mise en oeuvre soit susceptible de garantir une parfaite résistance mécanique de l'élément de coffrage de manière à prévenir les risques de rupture et à permettre l'obtention de paroi parfaitement plane au moins au niveau de la face destinée à se trouver à l'intérieur de la piscine.Thus, it appeared the need for a new type of module for producing a formwork element whose implementation is likely to ensure a perfect mechanical strength of the formwork element of in order to prevent the risk of rupture and to obtain a perfectly flat wall at least at the level of the face intended to be inside the pool.

Afin d'atteindre cet objectif, l'invention concerne un module destiné à être assemblé avec un autre module identique pour former un élément de coffrage perdu pour la réalisation d'une paroi de piscine en béton. Selon l'invention, ce module comprend :

  • â–  un panneau rectangulaire présentant une face recto et une face verso,
  • â–  une série de demi-entretoises réparties sur la face verso du panneau en s'étendant perpendiculairement au panneau, chaque demi-entretoise comprenant, au niveau de son extrémité distale, un élément d'emboîtement mâle et/ou femelle destiné à s'engager dans un élément d'emboîtement complémentaire d'une demi-entretoise correspondante lors de l'assemblage de deux modules.
In order to achieve this objective, the invention relates to a module intended to be assembled with another identical module to form a lost formwork element for the realization of a concrete pool wall. According to the invention, this module comprises:
  • â–  a rectangular panel with a front face and a back side,
  • A series of half-spacers distributed on the back side of the panel extending perpendicular to the panel, each half-spacer comprising, at its distal end, a male and / or female interlocking element intended to engage in a complementary interlocking element of a corresponding half-spacer when assembling two modules.

De plus, selon l'invention, ce module est caractérisé en ce que certaines au moins des demi-entretoises comprennent un alésage proximal qui est destiné à recevoir une vis d'assemblage et qui débouche au niveau de la face recto du panneau.In addition, according to the invention, this module is characterized in that at least some of the half-spacers comprise a proximal bore which is intended to receive an assembly screw and which opens at the front face of the panel.

L'invention concerne également un élément de coffrage perdu pour la réalisation d'une paroi de piscine qui comprend deux modules identiques selon l'invention emboîtés l'un dans l'autre au niveau de leur demi-entretoises et assemblés par une série de vis engagées dans des alésages proximaux de demi-entretoises emboîtées.The invention also relates to a lost formwork element for producing a pool wall which comprises two identical modules according to the invention nested one inside the other at their half-spacers and assembled by a series of screws. engaged in proximal bores of nested half-spacers.

La mise en oeuvre des vis, pour l'assemblage des modules constitutifs de l'élément de coffrage perdu, permet d'obtenir un élément de coffrage perdu présentant une très grande résistance mécanique et notamment une grande rigidité de ses panneaux empêchant toute déformation de ces derniers sous l'effet de la pression du béton. De plus, l'assemblage par vis peut être réalisé sans autre outillage qu'un tournevis ou une visseuse électrique tout en offrant une très grande qualité d'assemblage de sorte que l'assemblage des modules peut être effectué par un personnel peu qualifié, voire par l'utilisateur final de l'élément de coffrage perdu qui peut être un simple bricoleur. Ainsi, la mise en oeuvre d'un assemblage par vis permet d'envisager une livraison des modules non assemblés, ce qui permet une réduction du prix de vente mais aussi du volume de stockage des modules avant mise en oeuvre et assemblage. En effet, il est possible de stocker avant assemblage les deux modules constitutifs d'un élément de coffrage perdu de manière que l'extrémité distale des demi-entretoises d'un module soit au contact de la face verso du panneau de l'autre module de sorte que l'ensemble ainsi constitué présente un encombrement inférieur à celui de l'élément de coffrage dont les deux modules constitutifs ont leurs demi-entretoises emboîtées au niveau de leurs extrémités distales.The implementation of the screws, for assembling the constituent modules of the lost formwork element, makes it possible to obtain a lost formwork element having a very high mechanical strength and in particular a high rigidity of its panels preventing any deformation of these elements. last under the effect of concrete pressure. In addition, the screw connection can be achieved without other tools that a screwdriver or an electric screwdriver while offering a very high quality of assembly so that the assembly of the modules can be performed by a poorly qualified staff, even by the end user of the lost formwork element who can be a simple handyman. Thus, the implementation of a screw connection makes it possible to envisage delivery of the unassembled modules, which allows a reduction in the selling price but also the storage volume of the modules before implementation and assembly. Indeed, it is possible to store before assembly the two constituent modules of a lost formwork element so that the distal end of the half-spacers of a module is in contact with the reverse side of the panel of the other module so that the assembly thus formed has a footprint smaller than that of the formwork element whose two constituent modules have their half-spacers nested at their distal ends.

Il est à noter que selon l'invention, certaines seulement des demi-entretoises peuvent présenter un alésage proximal. Toutefois dans une forme préférée de réalisation, toutes les demi-entretoises présenteront un alésage proximal.It should be noted that according to the invention, only some of the half-spacers may have a proximal bore. However, in a preferred embodiment, all the half-struts will have a proximal bore.

Selon une caractéristique de l'invention et afin d'éviter une oxydation de l'extrémité filetée de la vis, l'alésage proximal s'étend sur une partie seulement de la longueur de la demi-entretoise. Cette caractéristique avantageuse de l'invention permet d'éviter l'apparition de taches au niveau du revêtement d'étanchéité placé au contact de la paroi réalisée au moyen d'éléments de coffrage perdu selon l'invention.According to a feature of the invention and to prevent oxidation of the threaded end of the screw, the proximal bore extends over only a portion of the length of the half-spacer. This advantageous characteristic of the invention makes it possible to avoid the appearance of spots at the level of the sealing liner placed in contact with the wall made by means of lost formwork elements according to the invention.

Dans le même sens et afin de faciliter la mise en place des vis d'assemblage, selon une autre caractéristique de l'invention, chaque demi-entretoise comprenant un alésage proximal comprend un alésage distal qui est coaxial avec l'alésage proximal et qui débouche au niveau de l'extrémité distale de la demi-entretoise. Cette caractéristique de l'invention permet d'éviter de devoir perforer au moyen de la vis une trop grande épaisseur de matière. Les alésages proximal et distal sont alors séparés par une zone intermédiaire pleine.In the same direction and in order to facilitate the introduction of the assembly screws, according to another characteristic of the invention, each half-spacer comprising a proximal bore comprises a distal bore which is coaxial with the proximal bore and which opens at the distal end of the half-spacer. This characteristic of the invention makes it possible to avoid having to perforate by means of the screw an excessive thickness of material. The proximal and distal bores are then separated by a solid intermediate zone.

De manière préférée, l'alésage proximal possède une longueur inférieure ou égale à un quart de la longueur de la demi-entretoise mesurée entre son extrémité distale et la face verso du panneau tandis que l'alésage distal possède une longueur inférieure ou égale à la moitié de la longueur de la demi-entretoise et supérieure au quart de la longueur de la demi-entretoise.Preferably, the proximal bore has a length less than or equal to one quarter of the length of the half-spacer measured between its distal end and the back side of the panel while the distal bore has a length less than or equal to half of the length of the half-spacer and greater than one quarter of the length of the half-spacer.

Selon une caractéristique de l'invention, une partie de la paroi de l'alésage distal est destinée à former une zone d'accroche pour le filet d'une vis d'assemblage. Cette caractéristique de l'invention permet de réduire les efforts nécessaires au vissage tout en garantissant l'efficacité de l'ancrage du filet.According to a feature of the invention, a portion of the wall of the distal bore is intended to form a hooking zone for the thread of an assembly screw. This feature of the invention reduces the forces required for screwing while ensuring the effectiveness of the anchoring of the net.

Toujours dans le sens d'une plus grande facilité de mise en place de la vis tout en garantissant la solidité de l'assemblage, l'alésage distal possède une partie proximale dont le diamètre est supérieur au diamètre maximal du filet de la vis d'assemblage et une partie distale dont le diamètre est inférieur au diamètre maximal du filet de la vis d'assemblage.Still in the sense of greater ease of installation of the screw while ensuring the strength of the assembly, the distal bore has a proximal portion whose diameter is greater than the maximum diameter of the thread of the screw. assembly and a distal portion whose diameter is smaller than the maximum diameter of the thread of the assembly screw.

Selon une autre caractéristique de l'invention, l'alésage proximal possède une partie proximale dont le diamètre est supérieur au diamètre maximal du filet de la vis d'assemblage et une partie distale dont le diamètre est inférieur au diamètre maximal du filet de la vis d'assemblage. Cette caractéristique de l'invention permet de réduire la longueur sur laquelle il est nécessaire de visser la vis tout en laissant subsister une partie au niveau de laquelle le filetage accroche de manière à faciliter l'engagement de la vis dans la zone pleine au niveau du fond de l'alésage proximal.According to another characteristic of the invention, the proximal bore has a proximal portion whose diameter is greater than the maximum diameter of the thread of the assembly screw and a distal portion whose diameter is smaller than the maximum diameter of the thread of the screw. assembly. This feature of the invention reduces the length on which it is necessary to screw the screw while leaving a portion at which the thread hangs so as to facilitate the engagement of the screw in the solid area at the level of bottom of the proximal bore.

Selon une autre caractéristique de l'invention destinée à faciliter la coulée de béton dans l'élément de coffrage obtenu à partir de l'assemblage de deux modules selon l'invention, chaque demi-entretoise comprend trois nervures situées à 120° les unes des autres et dont une nervure est orientée vers un bord supérieur du module, les nervures de la demi-entretoise étant destinées à renforcer cette dernière et à assurer une fonction de brise motte et de déflecteur lors de la coulée du béton.According to another characteristic of the invention intended to facilitate the pouring of concrete into the shuttering element obtained from the assembly of two modules according to the invention, each half-spacer comprises three ribs located at 120 ° others and a rib is oriented towards an upper edge of the module, the ribs of the half-spacer being intended to strengthen the latter and to ensure a breeze breaker function and deflector during the casting of concrete.

Selon une autre caractéristique de l'invention destinée à faciliter la mise en oeuvre de l'élément de coffrage obtenu par l'assemblage de deux modules selon l'invention, la face recto du panneau de chaque module comprend au moins une ligne de découpe destinée à guider un utilisateur pour une découpe du panneau du module.According to another characteristic of the invention intended to facilitate the implementation of the shuttering element obtained by the assembly of two modules according to the invention, the front face of the panel of each module comprises at least one cutting line for to guide a user for a panel cut of the module.

Afin de réduire les obstacles à la découpe du panneau, les demi-entretoises sont alors de préférence disposées de manière à ne pas se trouver sur une trajectoire de découpe définie par une ligne de découpe.In order to reduce the obstacles to cutting the panel, the half-spacers are then preferably arranged so as not to be on a cutting path defined by a cutting line.

Selon une autre caractéristique de l'invention et afin de permettre une cohésion au niveau des angles droits de parois réalisées au moyen d'éléments de coffrage perdu selon l'invention, la face recto du panneau comprend au moins une ligne de découpe située à proximité d'un bord latéral du panneau et destinée après découpe du panneau à définir une ouverture de passage du béton entre deux éléments de coffrage formant un angle droit.According to another characteristic of the invention and to allow a cohesion at the right angles of walls made by means of lost formwork elements according to the invention, the front face of the panel comprises at least one cutting line located nearby. a side edge of the panel and intended after cutting the panel to define a concrete passage opening between two shuttering elements forming a right angle.

Selon encore une autre caractéristique de l'invention, les bords latéraux ainsi que les bords supérieur et inférieur du panneau comprennent des moyens d'emboîtement destinés à permettre l'emboîtement de deux éléments de coffrage adjacents ou superposés.According to yet another characteristic of the invention, the lateral edges as well as the upper and lower edges of the panel comprise interlocking means intended to allow the interlocking of two adjacent or superposed formwork elements.

Un module selon l'invention peut être réalisé en tout matériau approprié et de manière préférée, afin de réduire son poids et son coût de fabrication, il sera réalisé en matière plastique injectée telle que par exemple en polypropylène ou polyéthylène.A module according to the invention can be made of any suitable material and preferably, in order to reduce its weight and its manufacturing cost, it will be made of injected plastic such as for example polypropylene or polyethylene.

Comme cela a été dit précédemment, l'invention concerne également un élément de coffrage perdu obtenu par l'assemblage, au moyen de vis, de modules identiques selon l'invention.As has been said above, the invention also relates to a lost formwork element obtained by assembling, by means of screws, identical modules according to the invention.

L'invention concerne aussi un élément de coffrage perdu pour la réalisation d'une paroi courbe de piscine, cet élément de coffrage perdu courbe comprend :

  • â–  un module selon l'invention, de grande taille, qui définit une face interne de l'élément de coffrage de hauteur et de longueur,
  • â–  au moins deux modules selon l'invention, de petite taille, qui définissent une face externe de l'élément de coffrage et présentent chacun une hauteur égale à la hauteur du grand module et une longueur inférieure à la longueur du grand module, et qui sont liés au grand module par emboîtement de leurs demi-entretoises avec les demi-entretoises du grand module et par une série de vis engagées dans des alésages proximaux de demi-entretoises emboîtées,
  • â–  et au moins une entretoise fixée sur chacun des deux petits modules de manière à maintenir écartés leurs bords voisins pour incurver le grand module.
The invention also relates to a lost formwork element for producing a curved pool wall, this curved formwork element comprises:
  • A module according to the invention, of large size, which defines an internal face of the formwork element of height and length,
  • At least two modules according to the invention, of small size, which define an external face of the shuttering element and each have a height equal to the height of the large module and a length less than the length of the large module, and are connected to the large module by interlocking their half-spacers with the half-spacers of the large module and by a series of screws engaged in proximal bores of interlocked half-spacers,
  • And at least one spacer fixed on each of the two small modules so as to keep their neighboring edges apart to bend the large module.

Selon une caractéristique de l'invention visant à réduire le nombre de pièces ou d'éléments différents pour réaliser un coffrage de piscine courbe, les modules de petite taille sont obtenus par découpe d'un module de grande taille.According to a feature of the invention to reduce the number of different parts or elements to achieve a curved pool formwork, the small modules are obtained by cutting a large module.

Selon une autre caractéristique de l'invention visant à permettre un réglage de la courbure de chaque élément de coffrage perdu courbe, chaque entretoise comprend, d'une part, à proximité d'un bord une série de perçages pour la mise en place de vis de fixation sur un premier module de petite taille et, d'autre part, une série de fenêtre allongées horizontales pour la mise en place de vis de fixation sur un second module de petite taille permettant un ajustement continu de la distance d'écartement entre les deux bords en regard des deux modules de petite taille voisins.According to another characteristic of the invention intended to allow adjustment of the curvature of each curved formwork element, each spacer comprises, on the one hand, near an edge a series of holes for the implementation of screws on a small first module and on the other hand, a series of horizontal elongate windows for the establishment of fixing screws on a second module of small size allowing a continuous adjustment of the distance between the spacers. two edges facing the two neighboring small modules.

Afin de faciliter ce réglage de courbure et permettre sa reproductibilité d'un élément courbe à l'autre, dans une forme préférée de réalisation chaque entretoise comprend au moins une ligne de graduations placée au-dessus d'une fenêtre allongée pour former des repères de réglage de l'écartement entre deux modules de petite taille voisins.In order to facilitate this curvature adjustment and allow its reproducibility from one curved element to another, in a preferred embodiment each spacer comprises at least one line of graduations placed over an elongated window to form reference marks. adjusting the spacing between two neighboring small modules.

Dans le même sens et selon une autre caractéristique de l'invention, chaque entretoise comprend au moins deux fentes pour la mise en place d'un gabarit destiné à définir l'écartement de deux modules de petite taille voisins.In the same direction and according to another characteristic of the invention, each spacer comprises at least two slots for the establishment of a template for defining the spacing of two neighboring small modules.

Selon encore une autre caractéristique de l'invention permettant de prédéfinir, à la conception des entretoises, des rayons de courbure, chaque entretoise comprend au moins deux séries de perçages alignés horizontalement destinés à recevoir des vis de fixation et à permettre un ajustement de l'écartement entre les modules de petite taille.According to yet another characteristic of the invention making it possible to predefined, in the design of the spacers, radii of curvature, each spacer comprises at least two series of horizontally aligned holes intended to receive fixing screws and to allow an adjustment of the spacing between small modules.

Selon une caractéristique de l'invention, les deux modules sont assemblés au moyen de vis qui possèdent chacune une longueur supérieure à 1,3 fois la longueur d'une demi-entretoise avec une partie non filetée s'entendant à partir de la tête de la vis sur une longueur supérieure ou égale à la longueur d'une demi-entretoise et présentant au-delà de la partie non filetée un filet autotaraudeur et dont le filet autotaraudeur est engagé dans la paroi d'un alésage distal et/ou dans la zone pleine de la demi-entretoise du module situé à l'opposé à la tête de la vis.According to a characteristic of the invention, the two modules are assembled by means of screws which each have a length greater than 1.3 times the length of a half-spacer with an unthreaded portion, which is heard from the head of the screw over a length greater than or equal to the length of a half-spacer and having beyond the unthreaded portion a self-tapping thread and whose self-tapping thread is engaged in the wall of a distal bore and / or in the solid area of the half-spacer of the module located opposite the head of the screw.

Par ailleurs, afin de permettre l'obtention d'un élément de coffrage perdu dont une face au moins est lisse, les têtes des vis d'assemblage sont de préférence toutes situées au niveau de la face recto d'un même module.Furthermore, in order to make it possible to obtain a lost formwork element of which at least one face is smooth, the heads of the assembly screws are preferably all located on the face of the same module.

De plus, afin d'éviter une oxydation susceptible de tacher le revêtement d'étanchéité susceptible d'être appliqué contre la paroi obtenue au moyen d'un élément de coffrage perdu selon l'invention, l'extrémité filetée de chaque vis d'assemblage ne débouche pas dans l'alésage proximal de la demi-entretoise correspondante.In addition, in order to avoid an oxidation liable to stain the sealing coating that can be applied against the wall obtained by means of a lost formwork element according to the invention, the threaded end of each assembly screw does not open into the proximal bore of the corresponding half-spacer.

Bien entendu, les différentes caractéristiques, évoquées ci-dessus, des modules ou des éléments de coffrage perdu selon l'invention, peuvent être mises en oeuvre les unes avec les autres selon différentes combinaisons lorsqu'elles ne sont pas exclusives les unes des autres.Of course, the various characteristics, mentioned above, modules or lost formwork elements according to the invention can be implemented with each other in different combinations when they are not exclusive of each other.

Par ailleurs, diverses autres caractéristiques de l'invention ressortent de la description faite ci-dessous en référence aux dessins annexés qui montrent, à titre d'exemples non limitatifs, une forme de réalisation préférée d'un élément de coffrage perdu et de ses modules constitutifs selon l'invention.Furthermore, various other features of the invention will emerge from the description given below with reference to the accompanying drawings which show, by way of non-limiting examples, a preferred embodiment of a lost formwork element and its modules. constituent parts according to the invention.

La fig. 1 est une coupe transversale d'un élément de coffrage perdu selon l'invention. Fig. 1 is a cross section of a lost formwork element according to the invention.

La fig. 2 est une perspective en vue côté recto d'un module pour la réalisation de l'élément de coffrage perdu illustré à la fig. 1. Fig. 2 is a perspective in front view of a module for producing the lost formwork element illustrated in FIG. 1.

La fig. 3 est une perspective en vue côté verso du module illustré à la fig. 2. Fig. 3 is a side perspective view of the module shown in FIG. 2.

La fig. 4 est une perspective d'un élément de coffrage perdu courbe selon l'invention. Fig. 4 is a perspective of a curved formwork element according to the invention.

Les fig. 5 et fig. 6 sont des perspectives partielles montrant des détails de montage d'un élément de coffrage perdu courbe selon l'invention obtenu à partir de l'assemblage d'un module de grande taille et de modules de petite taille selon l'invention. Figs. 5 and fig. 6 are partial views showing details of mounting a curved formwork element according to the invention obtained from the assembly of a large module and small modules of the invention.

La fig. 7 est une coupe partielle, selon le plan VII-VII de la fig. 4, de l'élément de coffrage perdu courbe illustré à la fig. 4. Fig. 7 is a partial section along the plane VII-VII of FIG. 4, of the curved formwork element illustrated in FIG. 4 .

Un élément de coffrage perdu selon l'invention, tel qu'illustré à la fig. 1 et désigné dans son ensemble par la référence 1 présente une forme générale sensiblement parallélépipédique. L'élément de coffrage perdu 1 est destiné à être associé avec d'autres éléments identiques pour définir par exemple le coffrage d'une paroi verticale de piscine. Les éléments de coffrage perdu 1 sont alors emboîtés les uns dans les autres verticalement et latéralement en fonction de la hauteur et de la longueur de paroi souhaitée.A lost formwork element according to the invention, as illustrated in FIG. 1 and designated as a whole by the reference 1 has a generally parallelepipedal general shape. The lost formwork element 1 is intended to be associated with other identical elements to define, for example, the formwork of a vertical wall of a swimming pool. The lost formwork elements 1 are then nested in each other vertically and laterally depending on the height and the desired wall length.

Chaque élément de coffrage 1 est obtenu par l'assemblage de deux modules identiques 2 en matière plastique injectée. Comme le montrent plus particulièrement les fig. 2 et 3, chaque module 2 comprend un panneau rectangulaire 3 qui possède une face recto 4 visible à la fig. 2 et une face verso 5 visible à la fig. 3. Each shuttering element 1 is obtained by assembling two identical modules 2 made of injected plastic material. As shown more particularly in FIGS. 2 and 3, each module 2 comprises a rectangular panel 3 which has a front face 4 visible in FIG. 2 and a reverse side 5 visible in FIG. 3.

Afin de permettre un emboîtement d'éléments de coffrage perdu 1 superposés, le panneau 3 présente au niveau de ses bords supérieur 6 et inférieur 7 des moyens d'emboîtement qui, selon l'exemple illustré, comprennent, d'une part, au niveau du bord inférieur 7 une série de languettes 8 séparées les unes des autres par des échancrures 9 et, d'autre part, au niveau du bord supérieur 6 une série de doigts 10 s'étendant perpendiculairement à la face verso 5 en étant alignés avec les échancrures 9. Selon l'exemple illustré, les doigts 10 sont séparés les uns des autres d'une distance d sensiblement égale à l'épaisseur e d'un élément de coffrage perdu 1. In order to allow a nesting of lost formwork elements 1 superimposed, the panel 3 has at its upper edges 6 and lower 7 interlocking means which, according to the illustrated example, comprise, on the one hand, at the the lower edge 7 a series of tabs 8 separated from each other by notches 9 and other on the upper edge 6 a series of fingers 10 extending perpendicular to the back side 5 being aligned with the indentations 9. According to the illustrated example, the fingers 10 are separated from each other by a distance d substantially equal to the thickness e of a lost formwork element 1.

De la même manière, afin de permettre un emboîtement d'éléments de coffrage perdu 1 juxtaposés, le panneau 3 présente en tant que moyen d'emboîtement au niveau de ses bords latéraux gauche 11 et droit 12 une languette latérale 13 située en partie basse du bord gauche 11 et en partie haute du bord droit 12. Il est à noter que les languettes latérales 13 assument également une fonction de limitation de suintement du béton à la jonction de deux éléments de coffrage.Similarly, in order to allow interlocking lost formwork elements 1 juxtaposed, the panel 3 is as interlocking means at its side edges 11 and left Law 12 a lateral tongue 13 located in the lower part of the left edge 11 and in the upper part of the right edge 12. It should be noted that the lateral tongues 13 also assume a function of limiting seepage of concrete at the junction of two formwork elements.

Afin de maintenir à distance les panneaux 3 des modules 2 constitutifs de l'élément de coffrage perdu 1 pour définir le volume de réception du béton, chaque panneau 3 comprend une série de demi-entretoises 20 réparties sur la face verso 5 en s'étendant perpendiculairement au panneau 3. Chaque demi-entretoise 20 possède au niveau de son extrémité distale, à l'opposé du panneau 3, un élément d'emboîtement 21 mâle et/ou femelle destiné à s'engager dans un élément d'emboîtement complémentaire d'une demi-entretoise correspondante lors de l'assemblage de deux modules 2. Selon l'exemple illustré, les demi-entretoises 20 sont disposées en quatre rangs parallèles au bord supérieur 6 du panneau 3 et les demi-entretoises d'un même rang présentent alternativement au niveau de leurs extrémités distales une conformation mâle et une conformation femelle de manière à éviter des erreurs dans l'assemblage de deux modules identiques 2. Il doit être remarqué que selon l'exemple illustré les demi-entretoises 20 sont disposées de manière symétrique par rapport à un plan médian P perpendiculaire au panneau 3. In order to keep the panels 3 of the modules 2 constituting the lost formwork element 1 at a distance to define the receiving volume of the concrete, each panel 3 comprises a series of half-spacers 20 distributed on the back side 5 while extending perpendicularly to the panel 3. Each half-spacer 20 has at its distal end, opposite the panel 3, a male and / or female interlocking element 21 intended to engage in a complementary interlocking element. corresponding half-spacer when assembling two modules 2. According to the illustrated example, the half-spacers 20 are arranged in four rows parallel to the upper edge 6 of the panel 3 and the half-spacers of the same rank present alternately at their distal ends a male conformation and a female conformation so as to avoid errors in the assembly of two identical modules 2. It should be noted that according to the illustrated example the half-spacers 20 are arranged symmetrically with respect to a median plane P perpendicular to the panel 3.

Afin de permettre un assemblage de deux modules 2 entre eux, chaque demi-entretoise 20 comprend un alésage proximal 22 qui est destiné à recevoir une vis d'assemblage V et qui débouche au niveau de la face recto 4 du panneau 3. L'alésage 22 est qualifié de proximal en raison de sa position par rapport au panneau 3. L'alésage 22 ne s'étend pas sur toute la longueur ℓ de la demi-entretoise 20 de sorte qu'il est non traversant. De manière préférée, l'alésage proximal 22 possède une longueur ℓ22 inférieure ou égale au quart de la longueur ℓ de la demi-entretoise 20. Afin d'avoir à percer au moyen de la vis d'assemblage V une épaisseur trop importante de matière, la demi-entretoise 20 possède également un alésage distal 23 qui est coaxial avec l'alésage proximal 22 et qui débouche au niveau de l'extrémité distale de la demi-entretoise 20. L'alésage distal 23 ne débouche pas dans l'alésage proximal 22 de sorte qu'il est séparé de ce dernier par une zone pleine 24. De manière préférée, l'alésage distal 23 possède une longueur ℓ23 inférieure ou égale à la moitié de la longueur ℓ de la demi-entretoise 20 et supérieure au quart de la longueur ℓ de la demi-entretoise 20. In order to allow an assembly of two modules 2 between them, each half-spacer 20 comprises a proximal bore 22 which is intended to receive an assembly screw V and which opens out at the front face. 4 of the panel 3. The bore 22 is called proximal because of its position relative to the panel 3. The bore 22 does not extend over the entire length ℓ of the half-spacer 20 so that it is not crossing. Preferably, the proximal bore 22 has a length ℓ 22 less than or equal to a quarter of the length ℓ of the half-spacer 20. In order to have to pierce by means of the assembly screw V an excessive thickness of half-spacer 20 also has a distal bore 23 which is coaxial with the proximal bore 22 and which opens out at the distal end of the half-spacer 20. The distal bore 23 does not open into the distal bore 23 . proximal bore 22 so that it is separated from the latter by a solid zone 24. Preferably, the distal bore 23 has a length ℓ 23 less than or equal to half the length ℓ of the half-spacer 20 and greater than one quarter of the length ℓ of the half-spacer 20.

Pour la réalisation d'un élément de coffrage perdu 1, il est mis en oeuvre deux modules identiques 2 tels que décrits précédemment. Les demi-entretoises 20 des deux modules sont emboîtées les unes dans les autres au niveau de leur extrémité distale puis il est engagé une vis d'assemblage V au niveau de chacun des alésages proximaux 22 de la face recto 4 d'un des deux modules 2 de sorte que la face recto de l'autre module offre une surface sensiblement lisse apte à recevoir un revêtement d'étanchéité.For the production of a lost formwork element 1, two identical modules 2 are used as described above. The half-spacers 20 of the two modules are nested one inside the other at their distal end, and then an assembly screw V is engaged at each of the proximal bores 22 of the front face 4 of one of the two modules. 2 so that the front face of the other module provides a substantially smooth surface adapted to receive a sealing coating.

Chaque vis d'assemblage V sera choisie de manière à présenter une longueur ℓV supérieure à 1,3 fois et de préférence égale à 1,5 fois la longueur d'une demi-entretoise ℓ avec une partie non filetée s'étendant à partir de la tête de la vis sur une longueur supérieure ou égale à la longueur d'une demi-entretoise ℓ. Chaque vis d'assemblage V présentera de plus au-delà de la partie non filetée un filet autotaraudeur.Each assembly screw V will be chosen so as to have a length ℓ V greater than 1.3 times and preferably equal to 1.5 times the length of a half-spacer ℓ with a non-threaded portion extending from the head of the screw to a length greater than or equal to the length of a half-spacer ℓ . Each assembly screw V will furthermore have beyond the unthreaded portion a self-tapping thread.

Afin de faciliter la pénétration de la vis d'assemblage V dans la partie pleine 24, l'alésage proximal 22 possède à proximité de son fond une zone d'accrochage pour le fil de la vis d'assemblage V. De manière préférée, l'alésage proximal 22 sera réalisé pour posséder une partie proximale dont le diamètre est supérieur au diamètre maximal du filet de la vis d'assemblage et une partie distale dont le diamètre est inférieur au diamètre maximal du filet de la vis d'assemblage V. In order to facilitate the penetration of the assembly screw V into the solid portion 24, the proximal bore 22 has close to its bottom a catching area for the thread of the assembly screw V. Preferably, the proximal bore 22 will be made to have a proximal portion whose diameter is greater than the maximum diameter of the thread of the assembly screw and a distal portion whose diameter is smaller than the maximum diameter of the thread of the assembly screw V.

Afin d'assurer l'efficacité de l'assemblage réalisé par la vis d'assemblage V, une partie de la paroi de l'alésage distal 23 est destinée à former une zone d'accroche pour le filet de la vis d'assemblage V. De manière préférée, l'alésage distal 23 possède alors une partie proximale dont le diamètre est supérieur au diamètre maximal du filet de la vis d'assemblage et une partie distale dont le diamètre est inférieur au diamètre maximal du filet de la vis d'assemblage. Ainsi, le filet de la vis d'assemblage vient s'accrocher dans la partie distale de plus faible diamètre de l'alésage distal 23 de la demi-entretoise 20 située à l'opposé de la tête de la vis d'assemblage V. La présence d'une partie de plus grand diamètre au niveau des alésages 23 permet de réduire les efforts nécessaires à la mise en place de chaque vis d'assemblage V. In order to ensure the effectiveness of the assembly carried out by the assembly screw V, part of the wall of the distal bore 23 is intended to form a fastening zone for the thread of the assembly screw V . preferably, the distal bore 23 then has a proximal portion whose diameter is greater than the maximum diameter of the cap screw thread and a distal portion having a diameter less than the maximum thread diameter of the screw assembly. Thus, the thread of the assembly screw is hooked into the distal portion of smaller diameter of the distal bore 23 of the half-spacer 20 located opposite the head of the assembly screw V. The presence of a larger diameter portion at the bores 23 reduces the effort required to install each screw assembly V.

Après la mise en place de toutes les vis d'assemblage V, l'élément de coffrage perdu 1 ainsi obtenu présente une résistance mécanique particulièrement importante et se trouve donc parfaitement adapté pour subir la pression interne exercée par le béton en cours de coulée.After the installation of all the assembly screws V, the lost formwork element 1 thus obtained has a particularly high mechanical strength and is therefore perfectly adapted to withstand the internal pressure exerted by the concrete during casting.

Afin de garantir une rigidité optimale à l'élément de coffrage perdu 1, chaque demi-entretoise 20 est de préférence renforcée par trois nervures 25 situées à 120° les unes des autres et dont une nervure est orientée vers un bord supérieur du module. Les nervures de chaque demi-entretoise 20 assurent alors de façon supplémentaire à sa fonction de renfort et lors de la coulée une fonction de guidage, de brise motte et de déflecteur du béton. Dans le même sens, la face verso 5 du panneau présente également des nervures 26 de rigidification.In order to ensure optimum rigidity to the lost formwork element 1, each half-spacer 20 is preferably reinforced by three ribs 25 located at 120 ° from each other and a rib is oriented towards an upper edge of the module. The ribs of each half-spacer 20 then provide additional reinforcing function and during casting a guiding function, breeze motte and baffle concrete. In the same direction, the back side 5 of the panel also has stiffening ribs 26 .

Par ailleurs, afin de faciliter la mise en oeuvre de l'élément de coffrage perdu et son adaptation aux différentes configurations susceptibles d'être rencontrées, la face recto 4 de chaque module 2 présente une série de lignes de découpe 30 à 33 destinées à guider un utilisateur pour une découpe du panneau du module. Afin de garantir une découpe facile, les demi-entretoises sont de préférence disposées de manière à ne pas se trouver sur une trajectoire de découpe définie par une ligne découpe.Furthermore, in order to facilitate the implementation of the lost formwork element and its adaptation to the different configurations that may be encountered, the front face 4 of each module 2 has a series of cutting lines 30 to 33 intended to guide a user for a cutting the module panel. In order to guarantee easy cutting, the half-spacers are preferably arranged so as not to be on a cutting path defined by a cutting line.

Ces lignes de découpe permettent de remplir différentes fonctions. Ainsi, la ligne de découpe 30 permet la réalisation d'une ouverture pour la mise en place d'une pièce à sceller pour la réception d'un projecteur immergé. Les lignes de découpe 31 permettent la réalisation d'une ouverture pour la mise en place d'une bouche d'aspiration de l'eau. Les lignes de découpe 32 situées à proximité d'un bord latéral du panneau 3 sont destinées après découpe du panneau à définir une ouverture de passage du béton entre deux éléments de coffrage formant un angle droit. Et enfin les lignes de découpe 33 sont destinées à permettre la réalisation d'ouvertures pour la mise en place de buses.These cutting lines make it possible to fulfill different functions. Thus, the cutting line 30 allows the realization of an opening for the establishment of a part to be sealed for the reception of a submerged projector. The cutting lines 31 allow the realization of an opening for the establishment of a suction mouth of the water. The cutting lines 32 located near a side edge of the panel 3 are intended after cutting the panel to define a concrete passage opening between two shuttering elements forming a right angle. And finally the cutting lines 33 are intended to allow the realization of openings for the introduction of nozzles.

L'élément de coffrage perdu 1 tel que décrit précédemment et illustré à la fig. 1 présente une forme droite plus particulièrement destinée à la réalisation de mur droit. Cependant, les modules selon l'invention 2 peuvent être utilisés pour réaliser un élément de coffrage perdu incurvé ou courbe 1c tel qu'illustré à la fig. 4. Ainsi, l'élément de coffrage courbe 1c est obtenu par l'assemblage d'un module de grande taille 2 avec des modules de petite taille 2p selon l'invention. Le modules de grande taille présente alors une hauteur H2 et une longueur Lp tandis que chaque module de petite taille possède une hauteur H2p sensiblement égale à la hauteur H2 et une longueur L2p. Dans une forme préférée de réalisation, l'élément de coffrage courbe 1c est formé par l'assemblage d'un module de grande taille 2 avec quatre modules de petite taille 2p obtenus par une découpe en quatre parties d'un module de grande taille 2, par exemple le long des trois lignes 40 illustrées en trait mixte à la fig. 3. Les modules de petite taille 2p sont assemblés avec le module de grande taille 2 par emboîtement des demi entretoises 20 et liaisons par vis comme cela a été décrit précédemment. La flexibilité du grand module 2 est alors mise à profit pour l'incurver et pour conférer à la face interne de l'élément courbe 1c, qu'il définit une forme concave, tandis que la face externe, définie par les modules de petite taille 2p, présentera une forme convexe. À cet effet, il est placé entre deux modules de petite taille 2p voisins une entretoise 41 de sorte que l'élément de coffrage courbe 1c comprend, selon l'exemple illustré, trois entretoises 41. Chaque entretoise 41 comprend alors à proximité de l'un de ses bords verticaux une série de perçages 42 destinée à recevoir des vis 43 pour la fixation de l'entretoise 41 sur un premier module de petite taille 2p1 comme le montrent les fig. 5 et 6. Chaque entretoise 41 comprend en outre une série de fenêtres allongées horizontales 44 pour la mise en place de vis 45 permettant la fixation de l'entretoise 41 sur un second module de petite taille 2p2 voisin du premier module de petite taille 2p1. La forme oblongue de chaque fenêtre 44 permet un ajustement continu de la distance d'écartement e entre les deux bords en regard des deux modules de petite taille 2p1 et 2p2. Compte tenu de la flexibilité du module de grande taille 2 en agissant sur la distance d'écartement e il est possible de moduler la courbure du module de grande taille 2 qui définit la face interne de l'élément de coffrage perdu courbe 1c comme le montre la fig. 7. Afin de faciliter ce réglage et selon l'exemple illustré, chaque entretoise 41 comprend au-dessus des fenêtres 44 une ligne de graduation 46. Toujours afin de faciliter le réglage d'écartement et selon l'exemple illustré, l'entretoise 41 comprend en outre au moins deux fentes 47 permettant d'engager un gabarit, non représenté, entre les bords des deux modules de petite taille 2p1 et 2p2 avant serrage des vis 45. The lost formwork element 1 as described above and illustrated in FIG. 1 has a straight form more particularly for the realization of straight wall. However, the modules according to the invention 2 can be used to produce a curved or curved lost formwork element 1c as illustrated in FIG. 4. Thus, the curved formwork element 1c is obtained by assembling a large module 2 with small modules 2p according to the invention. The large module then has a height H 2 and a length L p while each small module has a height H 2p substantially equal to the height H 2 and a length L 2p . In a preferred embodiment, the curved formwork element 1c is formed by assembling a large module 2 with four small modules 2p obtained by cutting into four parts of a large module 2 , for example along the three lines 40 shown in phantom in FIG. 3. The small size modules 2p are assembled with the large module 2 by interlocking the half-spacers 20 and screw connections as previously described. The flexibility of the large module 2 is then used to curvage it and to confer on the inner face of the curved element 1c that it defines a shape concave, while the outer face, defined by the small modules 2p, will have a convex shape. For this purpose, a spacer 41 is placed between two small modules 2p adjacent neighbors so that the curved formwork element 1c comprises, according to the illustrated example, three spacers 41. Each spacer 41 then comprises close to the one of its vertical edges a series of holes 42 for receiving screws 43 for fixing the spacer 41 on a first small module 2p 1 as shown in Figs. 5 and 6. Each spacer 41 further comprises a series of horizontal elongated windows 44 for the introduction of screws 45 for fixing the spacer 41 on a second small module 2p 2 adjacent the first small module 2p 1 . The oblong shape of each window 44 allows a continuous adjustment of the spacing distance e between the two edges opposite two small modules 2p 1 and 2p 2 . Given the flexibility of the large module 2 by acting on the spacing distance e it is possible to modulate the curvature of the large module 2 which defines the inner face of the curved formwork element curve 1c as shown fig. 7. In order to facilitate this adjustment and according to the illustrated example, each spacer 41 comprises above the windows 44 a graduation line 46. Still in order to facilitate the adjustment of spacing and according to the illustrated example, the spacer 41 further comprises at least two slots 47 for engaging a template, not shown, between the edges of the two small modules 2p 1 and 2p 2 before tightening the screws 45.

Si les fenêtres 44 permettent un réglage continu de l'écartement, il est également possible de prévoir deux séries 48 de perçages alignés horizontalement permettant la mise en place de vis de fixation pour maintenir écartés les modules de petite taille 2p voisins.If the windows 44 allow a continuous adjustment of the spacing, it is also possible to provide two series 48 horizontally aligned holes for the establishment of fastening screws to keep apart small modules 2p neighbors.

Bien entendu, diverses modifications peuvent être apportées au module 2 ou à l'élément de coffrage perdu 1 selon l'invention sans sortir du cadre de cette dernière.Of course, various modifications may be made to the module 2 or to the lost formwork element 1 according to the invention without departing from the scope thereof.

Claims (24)

- Module destiné à être assemblé avec un autre module identique pour former un élément de coffrage perdu pour la réalisation d'une paroi de piscine en béton, module comprenant : ■ un panneau rectangulaire (3) présentant une face recto (4) et une face verso (5), ■ une série de demi-entretoises (20) réparties sur la face verso (5) du panneau en s'étendant perpendiculairement au panneau, chaque demi-entretoise (20) comprenant au niveau de son extrémité distale un élément d'emboîtement mâle et/ou femelle destiné à s'engager dans un élément d'emboîtement complémentaire d'une demi-entretoise correspondante lors de l'assemblage de deux modules, caractérisé en ce que certaines au moins des demi-entretoises (20) comprennent un alésage proximal (22) qui est destiné à recevoir une vis d'assemblage et qui débouche au niveau de la face recto du panneau. - Module intended to be assembled with another identical module to form a lost formwork element for the realization of a concrete pool wall, module comprising: A rectangular panel ( 3 ) having a front face ( 4 ) and a reverse face ( 5 ), ■ a series of half-spacers ( 20 ) distributed on the back side ( 5 ) of the panel extending perpendicular to the panel, each half-spacer ( 20 ) comprising at its distal end a male interlocking element and / or female intended to engage in a complementary interlocking element of a corresponding half-spacer during the assembly of two modules, characterized in that at least one of the half-spacers ( 20 ) comprises a proximal bore ( 22 ) which is intended to receive an assembly screw and which opens out at the front face of the panel. - Module selon la revendication 1 caractérisé en ce que l'alésage proximal (22) s'étend sur une partie seulement de la longueur (ℓ) de la demi-entretoise (20). - Module according to claim 1 characterized in that the proximal bore ( 22 ) extends over only a portion of the length ( ℓ ) of the half-spacer ( 20 ). - Module selon la revendication 1 ou 2 caractérisé en que chaque demi-entretoise (20) comprenant un alésage proximal (22) comprend un alésage distal (23) qui est coaxial avec l'alésage proximal et qui débouche au niveau de l'extrémité distale de la demi-entretoise (20). - Module according to claim 1 or 2 characterized in that each half-spacer ( 20 ) comprising a proximal bore ( 22 ) comprises a distal bore ( 23 ) which is coaxial with the proximal bore and which opens at the distal end the half-spacer ( 20 ). - Module selon la revendication 3 caractérisé en ce que les alésages proximal et distal sont séparés par une zone intermédiaire pleine (24). - Module according to claim 3 characterized in that the proximal and distal bores are separated by a solid intermediate zone ( 24 ). - Module selon la revendication 3 ou 4 caractérisé en ce que l'alésage proximal (22) possède une longueur (ℓ 22 ) inférieure ou égale à un quart de la longueur (ℓ) de la demi-entretoise mesurée entre son extrémité distale et la face verso (4) du panneau et en ce que l'alésage distal (23) possède une longueur (ℓ 23 ) inférieure ou égale à la moitié de la longueur (ℓ) de la demi-entretoise et supérieure au quart de la longueur (ℓ) de la demi-entretoise. - Module according to claim 3 or 4 characterized in that the proximal bore ( 22 ) has a length ( ℓ 22 ) less than or equal to one quarter of the length ( ℓ ) of the half-spacer measured between its distal end and the front side ( 4 ) of the panel and in that the distal bore ( 23 ) has a length ( ℓ 23 ) less than or equal to half the length ( ℓ ) of the half-strut and greater than one quarter of the length ( ℓ ) of the half-spacer. - Module selon l'une des revendications 3 à 5 caractérisé en ce qu'une partie de la paroi de l'alésage distal (23) est destinée à former une zone d'accroche pour le filet d'une vis d'assemblage (V). - Module according to one of claims 3 to 5 characterized in that a portion of the wall of the distal bore ( 23 ) is intended to form a hooking zone for the thread of an assembly screw ( V ) . - Module selon l'une des revendications 3 à 5 caractérisé en ce que l'alésage distal (23) possède une partie proximale dont le diamètre est supérieur au diamètre maximal du filet de la vis d'assemblage et une partie distale dont le diamètre est inférieur au diamètre maximal du filet de la vis d'assemblage. - Module according to one of claims 3 to 5 characterized in that the distal bore ( 23 ) has a proximal portion whose diameter is greater than the maximum diameter of the thread of the assembly screw and a distal portion whose diameter is less than the maximum diameter of the thread of the assembly screw. - Module selon l'une des revendications 1 à 7 caractérisé en ce que l'alésage proximal (22) possède une partie proximale dont le diamètre est supérieur au diamètre maximal du filet de la vis d'assemblage et une partie distale dont le diamètre est inférieur au diamètre maximal du filet de la vis d'assemblage. - Module according to one of claims 1 to 7 characterized in that the proximal bore ( 22 ) has a proximal portion whose diameter is greater than the maximum diameter of the thread of the assembly screw and a distal portion whose diameter is less than the maximum diameter of the thread of the assembly screw. - Module selon l'une des revendication 1 à 8 caractérisé en ce que chaque demi-entretoise (20) comprend trois nervures (25) situées à 120° les unes des autres et dont une nervure est orientée vers un bord supérieur du module, les nervures de la demi-entretoise étant destinées à renforcer cette dernière et à assurer une fonction de brise motte et de déflecteur lors de la coulée du béton. - Module according to one of claims 1 to 8 characterized in that each half-spacer ( 20 ) comprises three ribs ( 25 ) located at 120 ° from each other and a rib is oriented towards an upper edge of the module, the ribs of the half-spacer being intended to reinforce the latter and to provide a breaker and deflector function during the pouring of concrete. - Module selon l'une des revendications 1 à 9 caractérisé en ce que la face recto (4) du panneau comprend au moins une ligne de découpe (30) destinée à guider un utilisateur pour une découpe du panneau du module. - Module according to one of claims 1 to 9 characterized in that the front face ( 4 ) of the panel comprises at least one cutting line ( 30 ) for guiding a user for cutting the module panel. - Module selon la revendication 10 caractérisé en que les demi-entretoises (20) sont disposées de manière à ne pas se trouver sur une trajectoire de découpe définie par une ligne découpe (30).- Module according to claim 10 characterized in that the half-spacers ( 20 ) are arranged so as not to be on a cutting path defined by a cutting line ( 30 ). - Module selon la revendication 10 ou 11 caractérisé en ce que la face recto (4) du panneau comprend au moins une ligne de découpe (32) située à proximité d'un bord latéral du panneau et destinée après découpe du panneau à définir une ouverture de passage du béton entre deux éléments de coffrage formant un angle droit.- Module according to claim 10 or 11 characterized in that the front face ( 4 ) of the panel comprises at least one cutting line ( 32 ) located near a side edge of the panel and intended after cutting the panel to define an opening passage of the concrete between two formwork elements forming a right angle. - Module selon l'une des revendications 1 à 11 caractérisé en ce que les bords latéraux (11,12) ainsi que les bords supérieur (6) et inférieur (7) du panneau (3) comprennent des moyens d'emboîtement (8, 9, 10, 13) destinés à permettre l'emboîtement de deux éléments de coffrage adjacents ou superposés. - Module according to one of claims 1 to 11 characterized in that the side edges (11,12) and the upper edge (6) and lower (7) of the panel (3) comprise engagement means (8, 9, 10, 13 ) intended to allow the interlocking of two adjacent or superposed formwork elements. - Module selon l'une des revendications 1 à 13 caractérisé en ce qu'il est réalisé en matière plastique. - Module according to one of claims 1 to 13 characterized in that it is made of plastic. - Elément de coffrage perdu pour la réalisation d'une paroi de piscine caractérisé en ce qu'il comprend deux modules identiques (2) selon l'une des revendications 1 à 14 emboîtés l'un dans l'autre au niveau de leur demi-entretoises (20) et assemblés par une série de vis (V) engagées dans des alésages proximaux (22) de demi-entretoises emboîtées. - Lost formwork element for the production of a pool wall characterized in that it comprises two identical modules ( 2 ) according to one of claims 1 to 14 nested one into the other at their half-level. spacers ( 20 ) and assembled by a series of screws ( V ) engaged in proximal bores ( 22 ) of interlocked half-spacers. - Elément de coffrage perdu pour la réalisation d'une paroi courbe de piscine caractérisé en ce qu'il comprend : ■ un module (2) selon l'une des revendications 1 à 14, de grande taille, qui définit une face interne de l'élément de coffrage de hauteur H2 et de longueur L2, ■ au moins deux modules (2p) selon l'une des revendications 1 à 14, de petite taille, qui définissent une face externe de l'élément de coffrage (1c) et présentent chacun une hauteur H2p égale à la hauteur H2 du grand module et une longueur L2p inférieure à la longueur L2 du grand module, et qui sont liés au grand module par emboîtement de leur demi-entretoises (20) avec les demi-entretoises (20) du grand module et par une série de vis (V) engagées dans des alésages proximaux (22) de demi-entretoises emboîtées, ■ et au moins une entretoise (41) fixée sur chacun des deux petits modules (2p) de manière à maintenir écartés leurs bords voisins pour incurver le grand module (2). - Lost formwork element for producing a curved pool wall characterized in that it comprises: ■ a module ( 2 ) according to one of claims 1 to 14, of large size, which defines an inner face of the shuttering element height H 2 and length L 2 , ■ at least two modules (2p) according to one of claims 1 to 14, of small size, which define an external face of the shuttering element (1 c) and each have a height H 2p equal to the height H 2 of the large module and a length L 2p smaller than the length L 2 of the large module, and which are connected to the large module by interlocking their half-spacers ( 20 ) with the half-spacers ( 20 ) of the large module and by a series screws ( V ) engaged in proximal bores ( 22 ) of interlocked half-spacers, And at least one spacer ( 41 ) fixed on each of the two small modules ( 2p ) so as to keep their neighboring edges apart to bend the large module ( 2 ). - Élément de coffrage perdu selon la revendication 16, caractérisé en ce que les modules de petite taille (2p) sont obtenus par découpe d'un module de grande taille (2). - Lost formwork element according to claim 16, characterized in that the small size modules ( 2p ) are obtained by cutting a large module ( 2 ). - Élément de coffrage perdu selon la revendication 16 ou 17, caractérisé en ce que chaque entretoise (41) comprend, d'une part, à proximité d'un bord une série de perçages (42) pour la mise en place de vis (43) de fixation sur un premier module de petite taille (2p1 ) et, d'autre part, une série de fenêtre allongées horizontales (44) pour la mise en place de vis de fixation sur un second module de petite taille (2p2 ) permettant un ajustement continu de la distance d'écartement (e) entre les deux bords en regard des deux modules de petite taille voisins (2p1, 2p2 ). - lost shuttering element according to claim 16 or 17, characterized in that each spacer (41) comprises, on one hand, close to one edge a series of bores (42) for the introduction of bolts (43 ) for fixing on a first small module ( 2p 1 ) and, on the other hand, a series of horizontal elongate windows ( 44 ) for the establishment of fixing screws on a second small module ( 2p 2 ) allowing a continuous adjustment of the spacing distance ( e ) between the two edges facing the two neighboring small modules ( 2p 1 , 2p 2 ). - Élément de coffrage perdu selon la revendication 18, caractérisé en ce que chaque entretoise (41) comprend au moins une ligne de graduations (46) placée au-dessus d'une fenêtre allongée (44) pour former des repères de réglage de l'écartement entre deux modules de petite taille voisins (2p1, 2p2 ). - lost shuttering element according to claim 18, characterized in that each spacer (41) comprises at least one line of graduations (46) placed above an elongate window (44) for forming control marks on the spacing between two small neighboring modules ( 2p 1 , 2p 2 ). - Élément de coffrage perdu selon l'une des revendications 16 à 18, caractérisé en ce que chaque entretoise (41) comprend au moins deux fentes (47) pour la mise en place d'un gabarit destiné à définir l'écartement de deux modules de petite taille voisins (2p1, 2p2 ).- Lost formwork element according to one of claims 16 to 18, characterized in that each spacer ( 41 ) comprises at least two slots ( 47 ) for the establishment of a template for defining the spacing of two modules small neighbors ( 2p 1 , 2p 2 ). - Élément de coffrage perdu selon l'une des revendications 16 à 20, caractérisé en ce que chaque entretoise (41) comprend au moins deux séries (48) de perçages alignés horizontalement destinés à recevoir des vis de fixation et à permettre un ajustement de l'écartement entre les modules de petite taille. - lost shuttering element according to one of claims 16 to 20, characterized in that each spacer (41) comprises at least two series (48) horizontally aligned bores for receiving fastening screws and to permit adjustment of the spacing between small modules. - Elément de coffrage perdu selon l'une des revendications 15 à 21 caractérisé en que les modules, qui le constituent, sont assemblés au moyen de vis (V) qui possèdent chacune une longueur (ℓV ) supérieure à 1,3 fois la longueur (ℓ) d'une demi-entretoise avec une partie non filetée s'entendant à partir de la tête de la vis sur une longueur supérieure ou égale à la longueur d'une demi-entretoise et présentant au-delà de la partie non filetée un filet autotaraudeur et dont le filet autotaraudeur est engagé dans la paroi d'un alésage distal et/ou dans la zone pleine de la demi-entretoise du module situé à l'opposé à la tête de la vis. - Lost formwork element according to one of claims 15 to 21 characterized in that the modules, which constitute it, are assembled by means of screws ( V ) which each have a length ( ℓ V ) greater than 1.3 times the length ( ℓ ) a half-spacer with a non-threaded portion extending from the head of the screw over a length greater than or equal to the length of a half-spacer and having beyond the unthreaded portion a self-tapping thread and whose self-tapping thread is engaged in the wall of a distal bore and / or in the solid zone of the half-spacer of the module located opposite the head of the screw. - Elément de coffrage perdu selon la revendication 22 caractérisé en que les têtes des vis d'assemblage (V) sont toutes situées au niveau de la face recto d'un même module. - Lost formwork element according to claim 22 characterized in that the heads of the assembly screws ( V ) are all located at the front face of the same module. - Elément de coffrage perdu selon la revendication 23 caractérisé en ce que l'extrémité filetée de chaque vis assemblage (V) ne débouche pas dans l'alésage proximal de la demi-entretoise correspondante. - Lost formwork element according to claim 23 characterized in that the threaded end of each assembly screw ( V ) does not open into the proximal bore of the corresponding half-spacer.
EP20060118434 2005-08-04 2006-08-04 Permanent formwork element and module for building such an element Active EP1749951B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0508322A FR2889550B1 (en) 2005-08-04 2005-08-04 LOST FORMWORK ELEMENT AND MODULE FOR PRODUCING SUCH A COMPONENT
FR0510165A FR2889552B3 (en) 2005-08-04 2005-10-05 LOST FORMWORK ELEMENT AND MODULE FOR CARRYING OUT SUCH ELEMENT.

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EP1749951A1 true EP1749951A1 (en) 2007-02-07
EP1749951B1 EP1749951B1 (en) 2009-07-15

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Application Number Title Priority Date Filing Date
EP20060118434 Active EP1749951B1 (en) 2005-08-04 2006-08-04 Permanent formwork element and module for building such an element

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EP (1) EP1749951B1 (en)
DE (1) DE602006007769D1 (en)
ES (1) ES2329163T3 (en)
FR (1) FR2889552B3 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2921399A1 (en) * 2007-09-21 2009-03-27 Lermite Soc Par Actions Simpli Wall-tie element for e.g. underground swimming pool, has patterns forming marks to permit adjustment of length of element before assembling, based on needs, and base forming wall including surface with rib to mount element on brace top
FR3014464A1 (en) * 2013-12-05 2015-06-12 Michel Dumonte RETRACTOR FOR THE CONSTRUCTION OF A WALL OF AN EDIFICE
US11155995B2 (en) * 2018-11-19 2021-10-26 Airlite Plastics Co. Concrete form with removable sidewall
US11591813B2 (en) 2016-11-14 2023-02-28 Airlite Plastics Co. Concrete form with removable sidewall

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2790777A1 (en) 1999-03-11 2000-09-15 Abriblue BANCHING ASSEMBLY, PARTICULARLY FOR THE CONSTRUCTION OF POOLS
FR2818998A1 (en) * 2001-01-02 2002-07-05 Joel Queirel PROCESS FOR THE PRODUCTION OF CIVIL ENGINEERING WORKS, AND PARTICULARLY POOLS OR WATER-RETAINING PONDS, AND MEANS FOR IMPLEMENTING SAME

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2790777A1 (en) 1999-03-11 2000-09-15 Abriblue BANCHING ASSEMBLY, PARTICULARLY FOR THE CONSTRUCTION OF POOLS
FR2818998A1 (en) * 2001-01-02 2002-07-05 Joel Queirel PROCESS FOR THE PRODUCTION OF CIVIL ENGINEERING WORKS, AND PARTICULARLY POOLS OR WATER-RETAINING PONDS, AND MEANS FOR IMPLEMENTING SAME

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2921399A1 (en) * 2007-09-21 2009-03-27 Lermite Soc Par Actions Simpli Wall-tie element for e.g. underground swimming pool, has patterns forming marks to permit adjustment of length of element before assembling, based on needs, and base forming wall including surface with rib to mount element on brace top
FR3014464A1 (en) * 2013-12-05 2015-06-12 Michel Dumonte RETRACTOR FOR THE CONSTRUCTION OF A WALL OF AN EDIFICE
US11591813B2 (en) 2016-11-14 2023-02-28 Airlite Plastics Co. Concrete form with removable sidewall
US11155995B2 (en) * 2018-11-19 2021-10-26 Airlite Plastics Co. Concrete form with removable sidewall

Also Published As

Publication number Publication date
FR2889552A1 (en) 2007-02-09
FR2889552B3 (en) 2007-11-02
ES2329163T3 (en) 2009-11-23
DE602006007769D1 (en) 2009-08-27
EP1749951B1 (en) 2009-07-15

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