EP1756367B1 - Lightweight metal joint for concrete surfaces - Google Patents

Lightweight metal joint for concrete surfaces Download PDF

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Publication number
EP1756367B1
EP1756367B1 EP05742465.7A EP05742465A EP1756367B1 EP 1756367 B1 EP1756367 B1 EP 1756367B1 EP 05742465 A EP05742465 A EP 05742465A EP 1756367 B1 EP1756367 B1 EP 1756367B1
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EP
European Patent Office
Prior art keywords
slab
concrete
joint
slabs
edge
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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.)
Not-in-force
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EP05742465.7A
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German (de)
French (fr)
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EP1756367A1 (en
Inventor
Pierre Raymond Kerrels
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Plakabeton SA
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Plakabeton SA
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Publication of EP1756367A1 publication Critical patent/EP1756367A1/en
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Publication of EP1756367B1 publication Critical patent/EP1756367B1/en
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    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01CCONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C11/00Details of pavings
    • E01C11/02Arrangement or construction of joints; Methods of making joints; Packing for joints
    • E01C11/04Arrangement or construction of joints; Methods of making joints; Packing for joints for cement concrete paving
    • E01C11/08Packing of metal
    • EFIXED CONSTRUCTIONS
    • E01CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
    • E01CCONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
    • E01C11/00Details of pavings
    • E01C11/02Arrangement or construction of joints; Methods of making joints; Packing for joints
    • E01C11/04Arrangement or construction of joints; Methods of making joints; Packing for joints for cement concrete paving
    • E01C11/14Dowel assembly ; Design or construction of reinforcements in the area of joints
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00Metal working
    • Y10T29/49Method of mechanical manufacture
    • Y10T29/49616Structural member making
    • Y10T29/49623Static structure, e.g., a building component
    • Y10T29/49632Metal reinforcement member for nonmetallic, e.g., concrete, structural element

Definitions

  • the present invention relates to the production of concrete surfaces and more particularly to the metal gasket used for this purpose to delimit the slabs.
  • this surface is divided into rectangular or square sections constituting the concrete slabs. This sharing is usually done using metal profiles defining each concrete slab and constituting the joint between the slabs.
  • these seals are provided with means for absorbing variations in the dimensions of the slabs due to thermal variations. These joints must also be able to absorb heavy loads while maintaining the correct level of the slab surface and avoiding any deterioration of the edges of concrete slabs.
  • these joints for concrete slabs are made from sheet steel profiles and more particularly of the type with double profile male and female interlocking such as mortise and tenon which allows the expansion of the slabs and which oppose displacements. vertical when passing heavy loads.
  • a commonly used gasket is made using a double substantially omega-shaped profile whose outer contour of one contours the contour inside each other.
  • the male central portion of the seal must necessarily have a sufficient volume to allow its filling by the concrete during molding.
  • the document WO 99/55968 also discloses a structural joint for concrete slabs comprising on the one hand an L-shaped female profile whose vertical flange extends along the edge of the slab and up to the upper edge thereof and whose double horizontal wing extends inwards from the slab and on the other hand an L-shaped male profile whose vertical wing also extends along the edge of the slab and up to the stop upper and the horizontal flange extends outwardly of the slab so as to engage in the female profile of the adjacent slab.
  • structural joints for concrete slabs comprise on the one hand, an L-shaped female metal profile whose vertical flange extends along the edge of the slab and up to the upper edge of that and on the other hand, an L-shaped male profile whose vertical wing also extends along the edge of the slab and up to the upper edge thereof, extending continuously. along the entire length of the slab.
  • a joint for concrete slabs comprising slab separation means and means for horizontal displacement of the slabs relative to each other, while avoiding a vertical displacement between the edges of adjacent slabs, the joint between two adjacent edges of two adjacent slabs comprising (a) a first profile provided at mid-height and at regular distances a series of tenons, said first section extending along an edge of a first slab; (b) a second profile extending along an edge of a second slab, and (c) a series of mortise-shaped elements.
  • the upper edges of said profiles do not show a fold.
  • the object of the present invention is to overcome the drawbacks mentioned above by simple and effective means which will be described in more detail below.
  • the seal is made from thinner sheet and reinforce the upper edge of the male and female profiles by folding the sheet on itself and compressing this doubled part by means mechanical cold forming to obtain a greater width of the edge with sharp corners and thus obtain an ideal shape of this edge; that is to say to obtain a right angle of the external side of the slab and an edge with a sharp angle on the concrete side.
  • This geometry therefore gives the upper edge of the concrete slab, in contact with the metal edge, an obtuse angle which supports the edge during heavy loads on the edge of the joint.
  • the metal gasket according to the present invention is produced according to the features as described in the appended claims.
  • a joint assembly comprising the male parts 1 and the female parts 2, distributing the surface to be concreted in square or rectangular sections or slabs.
  • FIGS. 2 and 3 show details of the seal in a vertical section AA in the figure 1 .
  • the first male part 1 is made from a steel plate 3 folded on itself, along its upper edge, and cold profiled to form the edge.
  • a series of studs 6 provided at their end with a head or enlargement 7. These studs 6 extend slightly downwards at an angle sufficient to allow effective attachment of the part 1 in the mass of the concrete.
  • this sheet 3 On the lower edge of this sheet 3 are welded at regular distances, a series of pins 5 which extend substantially horizontally on either side of the sheet 3. Below the pins 5 is provided a second vertical sheet 4 which extends downward in substance to the lower part of the slab. The thickness of this sheet 4 may be smaller than that of the sheet 3 since it serves only to separate the two adjacent concrete slabs.
  • the second part 2 of the seal according to the invention is shown in FIG. figure 2 and is composed of a longitudinal plate 8, similar to the sheet 3 of the first part 1.
  • the height of this sheet 8 is limited with respect to the sheet 3 and the lower end is folded on itself in the form of an L directed towards the interior of part 2.
  • a series of studs 12 provided at their end with a head or enlargement 13. These studs 12 extend slightly downwards at an angle sufficient to allow effective attachment of the part 2 in the mass of the concrete.
  • Part 2 also comprises a series of U-shaped mortises 10 whose opening 1 1 is intended to receive the tenons 5 of the male part 1.
  • This opening 1 1 is preferably provided with a conical inlet to facilitate the introduction of the tenon 5.
  • the outer surface of the mortises 10 is provided with attachment grooves for the concrete. Before pouring the concrete, these mortises 10 are pressed on the outer parts of the tenons 5.
  • the mortises 10 are advantageously made of plastic.
  • the two sheets 3 and 8 are juxtaposed and their upper folded surfaces form the sharp edge of the concrete slabs. We can also see the disposition of the series of mortises 10, driven on the respective tenons and studs 12.
  • the figure 5 is a plan view corresponding to the figure 4 on which we can also see the inner part of the pins 5 protruding from the sheet 3 and the series of studs 6 of the first part 1.
  • the concrete is poured until it reaches the upper edges of the sheets 3, 8.
  • the concrete will have flowed on both sides of the separating plate 4 and will have coated the pins 6, 12 and the pieces of the tenons 5 on the one hand of the separation and the mortises 10 on the other hand of separation.
  • a seal is obtained as shown in FIG. figure 6 or one can see the edge of a first slab 14 incorporating the first part 1 of the seal and the edge of a second slab 15 incorporating the second part 2 of the seal according to the invention.
  • the temporary fastening means 9 of the sheets 3 and 6 will break and the slab 15 can then take off completely from the slab 14 and move slightly to the left by moving the tenons 5, the slab 14 inside the mortises 10, the slab 15. This displacement will be much more flexible and without clashes or retained by rusted parts through the mortises 10 of plastic.
  • the vertical loads exerted on the upper surface of the joint according to the invention will be uniformly distributed over the two slab edges; the vertical displacements will be avoided by the pins 5 and the strength of the upper edges of concrete is increased thanks to the obtuse angles ⁇ of the upper corners.
  • the parts of the slabs located between the pieces of the tenons 5 and mortises 10 also allow the recovery of large loads without excessive play at the joint. Indeed, these parts retain the total thickness of the slab thus avoiding as much as possible the cracks and the fracture initiators in the longitudinal direction near the seal.
  • the figure 7 shows in detail the shaping of the upper edge of steel sheets 3 and 8.
  • this edge is folded on itself over the entire length and then profiled cold.
  • a set of three rollers is used, the first of which acts in a horizontal plane H, the second in a vertical plane V (angle of 90 °) and the third in an oblique plane A situated at an acute angle to the roller V and leaving, therefore, an obtuse angle ⁇ relative to the upper surface of the concrete.
  • This angle ⁇ should preferably be obtuse to confer increased strength of the edge of the concrete slab.
  • the figure 8 shows the upper edge of a portion of the joint thus obtained which has sharp corners C and a smooth upper surface S through rolling and cold working.
  • the upper edge of the seal according to the invention is therefore made from steel sheets, 3 to 4 mm thick, whose upper edges are folded on themselves and then cold rolled to obtain a Smooth upper surface with a width of 8 to 12 mm with sharp corners made of hardened steel thanks to the cold deformation which hardens the material and makes it more resistant.
  • the figure 9 shows a corner of concrete slab provided with a portion of the seal according to the invention.
  • the shape thus obtained by the concrete during casting gives it greater resistance F to the wrinkle thanks to its obtuse angle ⁇ at the most critical place.
  • gasket according to the invention Another advantage of the gasket according to the invention is that the quantity of steel required is greatly reduced while providing sharp edges that are reinforced and straight because they can be made from thin steel sheets, one edge of which is folded over. itself and cold rolled which gives it a glossy appearance and increased resistance to the steel thus compressed relative to the edge of a thick sheared sheet with a rough section or a rolled steel plate.

Description

La présente invention se rapporte à la réalisation de surfaces en béton et plus particulièrement au joint métallique utilisé à cet effet pour délimiter les dalles.The present invention relates to the production of concrete surfaces and more particularly to the metal gasket used for this purpose to delimit the slabs.

Pour réaliser de grandes surfaces bétonnées, on partage cette surface en sections rectangulaires ou carrées constituant les dalles de béton. Ce partage est en général réalisé à l'aide de profilés métalliques délimitant chaque dalle de béton et constituant le joint entre les dalles.To produce large concrete surfaces, this surface is divided into rectangular or square sections constituting the concrete slabs. This sharing is usually done using metal profiles defining each concrete slab and constituting the joint between the slabs.

Avantageusement, ces joints sont prévus de moyens permettant d'absorber les variations de dimensions des dalles dues aux variations thermiques. Ces joints doivent aussi pouvoir absorber les charges lourdes tout en maintenant le niveau correct de la surface des dalles et en évitant toute dégradation des bords de dalles en béton.Advantageously, these seals are provided with means for absorbing variations in the dimensions of the slabs due to thermal variations. These joints must also be able to absorb heavy loads while maintaining the correct level of the slab surface and avoiding any deterioration of the edges of concrete slabs.

A cet effet, ces joints doivent répondre aux critères suivants :

  • offrir une protection efficace de l'arête vive des dalles de béton ;
  • garantir un ancrage positif pour éviter tout risque de décollage avec la dalle ;
  • permettre la réalisation d'une épaisseur suffisante de matière pour éviter le cisaillement de la dalle dû aux points faibles causé par le profil du joint ;
  • permettre le retrait ou une dilatation des dalles par des moyens tels qu'un emboîtement du type tenon et mortaise, qui assurent en plus le maintien à niveau des dalles.
For this purpose, these joints must meet the following criteria:
  • provide effective protection of the sharp edge of concrete slabs;
  • guarantee a positive anchorage to avoid any risk of taking off with the slab;
  • allow the realization of a sufficient thickness of material to avoid shearing of the slab due to weak points caused by the profile of the joint;
  • allow the removal or expansion of the slabs by means such as an interlocking type mortise and tenon, which further ensure the maintenance of the slabs.

Généralement, ces joints pour dalles en béton sont réalisés à partir de profils en tôle d'acier et plus particulièrement du genre à profil double à emboîtement mâle et femelle tel que tenon et mortaise qui permet la dilatation des dalles et qui s'opposent aux déplacements verticaux lors de passage de charges lourdes.Generally, these joints for concrete slabs are made from sheet steel profiles and more particularly of the type with double profile male and female interlocking such as mortise and tenon which allows the expansion of the slabs and which oppose displacements. vertical when passing heavy loads.

Un joint courammènt utilisé est réalisé à l'aide d'un double profil en substance en forme d'oméga dont le contour extérieur de l'un épouse le contour intérieur de l'autre. La partie centrale mâle du joint doit nécessairement présenter un volume suffisant pour permettre son remplissage par le béton lors du moulage.A commonly used gasket is made using a double substantially omega-shaped profile whose outer contour of one contours the contour inside each other. The male central portion of the seal must necessarily have a sufficient volume to allow its filling by the concrete during molding.

Pour une épaisseur constante de la dalle et dans le cas où la partie supérieure du joint devrait être augmentée pour des raisons de capacités de reprises de charges importantes, la partie inférieure du joint devient automatiquement insuffisante et, par conséquent, cette partie inférieure ne sera plus capable de supporter ces charges par manque d'épaisseur de la matrice. Il en résulte qu'il est nécessaire de pouvoir disposer de nombreux modèles de joints avec des hauteurs différentes.For a constant thickness of the slab and in the case where the upper part of the joint should be increased for reasons of high load carrying capacity, the lower part of the seal automatically becomes insufficient and, consequently, this lower part will no longer be able to support these loads due to lack of thickness of the matrix. As a result, it is necessary to have many models of joints with different heights.

Un autre problème rencontré avec ce genre de profils est que, en cas de hauteur limitée de la dalle de béton, les dimensions minimum du profil en forme d'oméga reste malgré tout très important à cause du volume nécessaire de la partie centrale (mâle) du joint. Il en résulte que la masse de béton qui subsiste dans la partie supérieure du bord de la dalle, située au-dessus de l'emboîtement du profil, est largement insuffisante pour pouvoir résister aux charges normales (verticales) sur la surface de la dalle et que, par conséquent, cette partie est exposée aux dégradations par fissuration ou par épaufrement du béton.Another problem encountered with this type of profile is that, in case of limited height of the concrete slab, the minimum dimensions of the omega-shaped profile is still very important because of the necessary volume of the central part (male) of the seal. As a result, the mass of concrete that remains in the upper part of the edge of the slab, located above the interlocking profile, is largely insufficient to withstand the normal loads (vertical) on the surface of the slab and that, consequently, this part is exposed to the degradations by cracking or by wadding of the concrete.

Actuellement, il existe déjà des joints du genre à emboîtement mâle et femelle décalé vers le bas par rapport à la ligne médiane de la dalle pour obtenir une épaisseur de matière plus importante au-dessus de l'emboîtement en vue d'obtenir une résistance accrue contre les charges sur les bords des dalles.Currently, there are already male and female interlocking seals offset downward from the median line of the slab to obtain a greater material thickness above the interlocking for increased strength. against the loads on the edges of the slabs.

Le document WO 99/55968 décrit également un joint de structure pour dalles en béton comprenant d'une part un profil femelle en forme de L dont l'aile verticale s'étend le long du bord de la dalle et jusqu'à l'arrête supérieure de celle-ci et dont la double aile horizontale s'étend vers l'intérieur de la dalle et d'autre part un profil mâle en forme de L dont l'aile verticale s'étend également le long du bord de la dalle et jusqu'à l'arrête supérieure de celle-ci et dont l'aile horizontale s'étend vers l'extérieur de la dalle de façon à pouvoir s'engager dans le profil femelle de la dalle adjacente.The document WO 99/55968 also discloses a structural joint for concrete slabs comprising on the one hand an L-shaped female profile whose vertical flange extends along the edge of the slab and up to the upper edge thereof and whose double horizontal wing extends inwards from the slab and on the other hand an L-shaped male profile whose vertical wing also extends along the edge of the slab and up to the stop upper and the horizontal flange extends outwardly of the slab so as to engage in the female profile of the adjacent slab.

Le problème rencontré avec ce genre de profil est qu'il est laminé en longueur continue et, lorsqu'il est placé dans le béton, il coupe l'épaisseur de la dalle en deux parties à proximité du joint. A cet endroit, il n'y a plus que la moitié de l'épaisseur du béton de chaque coté du profil mâle et femelle ce qui provoque des amorces de rupture dans le sens longitudinal de la dalle.The problem with this type of profile is that it is laminated in continuous length and, when placed in concrete, it cuts the thickness of the slab into two parts near the joint. At this point, there is more than half the thickness of the concrete on each side of the male and female profile which causes breakage initiators in the longitudinal direction of the slab.

Bien que ce joint offre une bonne résistance contre les charges verticales on observe néanmoins des amorces de fissurations aux extrémités des parties horizontales des profils dues au fait que ces joints s'étendent de façon continue sur toute la longueur de la dalle tout en affaiblissant les bords des dalles de béton. En effet, l'épaisseur ou hauteur des dalles en béton est calculée pour supporter des charges verticales maximales mais les bords des dalles ne disposent plus de toute la hauteur nécessaire pour supporter ces charges, étant donné qu'ils sont interrompus sur toute leur longueur par l'aile horizontale du profil de joint.Although this joint offers good resistance against vertical loads, there are nevertheless cracking primers at the ends of the horizontal sections of the profiles due to the fact that these joints extend continuously over the entire length of the slab while weakening the edges. concrete slabs. Indeed, the thickness or height of the concrete slabs is calculated to support maximum vertical loads but the edges of the slabs no longer have all the height necessary to support these loads, since they are interrupted over their entire length by the horizontal wing of the joint profile.

Un autre problème de ce type de joint est qu'il n'offre qu'une résistance limitée aux déformations de l'arrête vive de la dalle de béton, étant donné que l'épaisseur du profil qui s'étend jusqu'à la surface supérieure reste limitée à l'épaisseur de la tôle formant le profil. Il est important de mettre en oeuvre des joints procurant un renforcement efficace de l'arrête vive supérieure des dalles de béton.Another problem with this type of joint is that it offers only limited resistance to the deformations of the sharp edge of the concrete slab, since the thickness of the profile which extends to the surface upper limit remains limited to the thickness of the sheet forming the profile. It is important to use joints that effectively strengthen the sharp edge of concrete slabs.

En général, les joints de structure pour dalles en béton comprennent d'une part, un profil métallique femelle en forme de L dont l'aile verticale s'étend le long du bord de la dalle et jusqu'à l'arête supérieure de celle-ci et d'autre part, un profil mâle de forme de L dont l'aile verticale s'étend également le long du bord de la dalle et jusqu'à l'arête supérieure de celle-ci, s'étendant de façon continue sur toute la longueur de la dalle.In general, structural joints for concrete slabs comprise on the one hand, an L-shaped female metal profile whose vertical flange extends along the edge of the slab and up to the upper edge of that and on the other hand, an L-shaped male profile whose vertical wing also extends along the edge of the slab and up to the upper edge thereof, extending continuously. along the entire length of the slab.

Ces deux profils s'assemblent face à face de façon à former les lèvres renforcées des dalles de béton à joindre. Ces joints métalliques sont lourds et onéreux.These two profiles meet face to face to form the reinforced lips of the concrete slabs to join. These metal seals are heavy and expensive.

On connaît par le document EP1389648 un joint pour dalles en béton comprenant des moyens de séparation des dalles et des moyens permettant un délacement horizontal des dalles les unes par rapport aux autres, tout en évitant un déplacement vertical entre les bords de dalles adjacentes, le joint entre deux bords adjacents de deux dalles adjacentes comprenant (a) un premier profilé muni à mi-hauteur et à distances régulières d'une séries de tenons, ledit premier profilé s'étendant le long d'un bord d'une première dalle; (b) un deuxième profilé s'étendant le long d'un bord d'une deuxième dalle, et (c) une série d'éléments en forme de mortaises. Les bords supérieurs desdits profilés ne présentent pas de repli.We know from the document EP1389648 a joint for concrete slabs comprising slab separation means and means for horizontal displacement of the slabs relative to each other, while avoiding a vertical displacement between the edges of adjacent slabs, the joint between two adjacent edges of two adjacent slabs comprising (a) a first profile provided at mid-height and at regular distances a series of tenons, said first section extending along an edge of a first slab; (b) a second profile extending along an edge of a second slab, and (c) a series of mortise-shaped elements. The upper edges of said profiles do not show a fold.

Le but de la présente invention est de remédier aux inconvénients cités ci-dessus par des moyens simples et efficaces qui seront décrit plus en détail ci-après.The object of the present invention is to overcome the drawbacks mentioned above by simple and effective means which will be described in more detail below.

A cet effet, le joint, conforme à la présente invention, est réalisé à partir de tôle plus mince et de renforcer l'arrête supérieure des profils mâle et femelle en repliant la tôle sur elle-même et en comprimant cette partie doublée par des moyens mécaniques de profilage à froid pour obtenir une largeur plus importante de l'arête avec des coins vifs et ainsi obtenir une forme idéale de cette arête; c'est à dire obtenir un angle droit du côté extérieur de la dalle et une arête avec un angle aigu côté béton.For this purpose, the seal, according to the present invention, is made from thinner sheet and reinforce the upper edge of the male and female profiles by folding the sheet on itself and compressing this doubled part by means mechanical cold forming to obtain a greater width of the edge with sharp corners and thus obtain an ideal shape of this edge; that is to say to obtain a right angle of the external side of the slab and an edge with a sharp angle on the concrete side.

Cette géométrie confère donc au bord supérieur de la dalle en béton, en contact avec l'arête métallique, un angle obtus qui soutient l'arête lors de charges importantes sur l'arête du joint.This geometry therefore gives the upper edge of the concrete slab, in contact with the metal edge, an obtuse angle which supports the edge during heavy loads on the edge of the joint.

A cet effet, le joint métallique, conforme à la présente invention, est réalisé selon les caractéristiques telles que décrit dans les revendications annexées.For this purpose, the metal gasket according to the present invention is produced according to the features as described in the appended claims.

Afin de bien faire comprendre l'invention, un exemple de réalisation du joint est décrit dans la description qui suit et dans laquelle on se réfère aux dessins annexés dans lesquelles :

  • la figure 1 : montre la préparation d'une partie de surface à bétonner à l'aide d'un ensemble de joints conforme à l'invention ;
  • la figure 2 : montre un détail en perspectif d'une première partie du joint selon l'invention comportant des éléments mâles ;
  • la figure 3 : montre un détail en perspectif d'une deuxième partie du joint selon l'invention comportant des éléments femelles ;
  • figure 4 : est une vue en perspectif d'un assemblage des deux parties selon l'invention avant la coulée du béton ;
  • la figure 5 : est une vue en plan de l'assemblage selon la figure 4 ;
  • la figure 6 : est une vue en coupe verticale du joint métallique après la coulée du béton;
  • les figures 7, 8 et 9: montrent en détail la réalisation de la partie supérieure du joint métallique selon l'invention.
In order to clearly understand the invention, an embodiment of the joint is described in the description which follows and in which reference is made to the appended drawings in which:
  • the figure 1 shows the preparation of a surface portion to be concreted with a set of joints according to the invention;
  • the figure 2 : shows a perspective detail of a first part of the seal according to the invention comprising male elements;
  • the figure 3 : shows a perspective detail of a second part of the seal according to the invention comprising female elements;
  • the figure 4 is a perspective view of an assembly of the two parts according to the invention before pouring concrete;
  • the figure 5 : is a plan view of the assembly according to the figure 4 ;
  • the figure 6 : is a vertical sectional view of the metal seal after pouring concrete;
  • the Figures 7, 8 and 9 : show in detail the realization of the upper part of the metal seal according to the invention.

Sur la figure 1 , on a montré un assemblage de joints, comprenant les parties mâles 1 et les parties femelles 2, répartissant la surface à bétonner en sections ou dalles carrées ou rectangulaires.On the figure 1 a joint assembly has been shown, comprising the male parts 1 and the female parts 2, distributing the surface to be concreted in square or rectangular sections or slabs.

Les figures 2 et 3 montrent des détails du joint selon une coupe verticale A-A dans la figure 1.The Figures 2 and 3 show details of the seal in a vertical section AA in the figure 1 .

La première partie mâle 1 est réalisée à partir d'une tôle en acier 3 repliée sur elle-même, le long de son bord supérieur, et profilée à froid pour former l'arête.The first male part 1 is made from a steel plate 3 folded on itself, along its upper edge, and cold profiled to form the edge.

Sur une des faces latérales de la tôle 3, qui est dirigée vers l'intérieur de la partie 1 du joint, sont prévus une série de goujons 6 munis à leur extrémité d'une tête ou élargissement 7. Ces goujons 6 s'étendent légèrement vers le bas sous un angle suffisant pour permettre un accrochage efficace de la partie 1 dans la masse du béton.On one of the side faces of the sheet 3, which is directed towards the inside of the part 1 of the seal, are provided a series of studs 6 provided at their end with a head or enlargement 7. These studs 6 extend slightly downwards at an angle sufficient to allow effective attachment of the part 1 in the mass of the concrete.

Sur le bord inférieur de cette tôle 3 sont soudés, à distances régulières, une série de tenons 5 qui s'étendent en substance horizontalement de part et d'autre de la tôle 3. En dessous des tenons 5 on prévoit une seconde tôle verticale 4 qui s'étend vers le bas en substance jusqu'à la partie inférieure de la dalle. L'épaisseur de cette tôle 4 peut être inférieure que celle de la tôle 3 étant donné qu'elle sert uniquement à séparer les deux dalles de béton adjacentes.On the lower edge of this sheet 3 are welded at regular distances, a series of pins 5 which extend substantially horizontally on either side of the sheet 3. Below the pins 5 is provided a second vertical sheet 4 which extends downward in substance to the lower part of the slab. The thickness of this sheet 4 may be smaller than that of the sheet 3 since it serves only to separate the two adjacent concrete slabs.

La deuxième partie 2 du joint selon l'invention est montrée à la figure 2 et est composée d'une tôle longitudinal 8, similaire à la tôle 3 de la première partie 1. La hauteur de cette tôle 8 est limitée par rapport à la tôle 3 et l'extrémité inférieure est repliée sur elle-même en forme de L dirigé vers l'intérieur de la partie 2.The second part 2 of the seal according to the invention is shown in FIG. figure 2 and is composed of a longitudinal plate 8, similar to the sheet 3 of the first part 1. The height of this sheet 8 is limited with respect to the sheet 3 and the lower end is folded on itself in the form of an L directed towards the interior of part 2.

Sur une des faces latérales du plat 8, qui est dirigée vers l'intérieur de la partie 2, sont prévus, à distances régulières, une série de goujons 12 munis à leur extrémité d'une tête ou élargissement 13.
Ces goujons 12 s'étendent légèrement vers le bas sous un angle suffisant pour permettre un accrochage efficace de la partie 2 dans la masse du béton.
On one of the lateral faces of the plate 8, which is directed towards the inside of the part 2, are provided, at regular distances, a series of studs 12 provided at their end with a head or enlargement 13.
These studs 12 extend slightly downwards at an angle sufficient to allow effective attachment of the part 2 in the mass of the concrete.

La partie 2 comprend également une série de mortaises 10 en forme de U dont l'ouverture 1 1 est destinée à recevoir les tenons 5 de la partie mâle 1. Cette ouverture 1 1 est de préférence pourvue d'une entrée conique pour faciliter l'introduction du tenon 5. La surface extérieure des mortaises 10 est munie de rainures d'accrochage pour le béton. Avant la coulée du béton, ces mortaises 10 sont enfoncées sur les parties extérieures des tenons 5. Les mortaises 10 seront avantageusement réalisées en matière plastique.Part 2 also comprises a series of U-shaped mortises 10 whose opening 1 1 is intended to receive the tenons 5 of the male part 1. This opening 1 1 is preferably provided with a conical inlet to facilitate the introduction of the tenon 5. The outer surface of the mortises 10 is provided with attachment grooves for the concrete. Before pouring the concrete, these mortises 10 are pressed on the outer parts of the tenons 5. The mortises 10 are advantageously made of plastic.

Sur la figure 4 on a montré une section de joint assemblé avant le moulage du béton et montrant la deuxième partie 2 du joint accroché sur la partie 1 par des moyens pouvant se rompre lors de la contraction ultérieure des dalles adjacentes. Ces moyens pouvant être des boulons ou rivets 9 en matière plastique.On the figure 4 an assembled joint section has been shown prior to concrete casting and showing the second portion 2 of the joint attached to the part 1 by means which can break upon subsequent contraction of the adjacent slabs. These means may be bolts or rivets 9 made of plastic.

Les deux tôles 3 et 8 sont juxtaposées et leurs surfaces supérieures repliées forment l'arête vive des dalles de béton. On peut également voir la disposition des séries de mortaises 10, enfoncées sur les tenons 5 respectifs et des goujons 12.The two sheets 3 and 8 are juxtaposed and their upper folded surfaces form the sharp edge of the concrete slabs. We can also see the disposition of the series of mortises 10, driven on the respective tenons and studs 12.

La figure 5 est une vue en plan correspondante à la figure 4 sur laquelle on peut voir également la partie intérieure des tenons 5 dépassant la tôle 3 et la série des goujons 6 de la première partie 1.The figure 5 is a plan view corresponding to the figure 4 on which we can also see the inner part of the pins 5 protruding from the sheet 3 and the series of studs 6 of the first part 1.

La mise en oeuvre des joints selon l'invention se réalise comme suit :

  • Lorsque les joints 1 , 2 sont assemblés comme illustré à la figure 1 , on coule du béton dans chaque section délimitée par les joints 1, 2 afin de former une surface de dalles de béton.
The implementation of the joints according to the invention is carried out as follows:
  • When the joints 1, 2 are assembled as shown in FIG. figure 1 concrete is poured into each section delimited by the joints 1, 2 to form a surface of concrete slabs.

On coule le béton jusqu'à ce qu'il arrive à fleur des arêtes supérieures des tôles 3, 8.The concrete is poured until it reaches the upper edges of the sheets 3, 8.

A ce moment, le béton aura coulé de part et d'autre de la tôle de séparation 4 et aura enrobée les goujons 6, 12 et les morceaux des tenons 5 d'une part de la séparation et les mortaises 10 de l'autre part de la séparation.At this time, the concrete will have flowed on both sides of the separating plate 4 and will have coated the pins 6, 12 and the pieces of the tenons 5 on the one hand of the separation and the mortises 10 on the other hand of separation.

Après durcissement on obtient ainsi un joint tel que représenté à la figure 6 ou l'on peut voir le bord d'une première dalle 14 incorporant la première partie 1 du joint et le bord d'une deuxième dalle 15 incorporant la deuxième partie 2 du joint selon l'invention.After hardening, a seal is obtained as shown in FIG. figure 6 or one can see the edge of a first slab 14 incorporating the first part 1 of the seal and the edge of a second slab 15 incorporating the second part 2 of the seal according to the invention.

En cas de rétrécissement, les moyens de fixations provisoires 9 des tôles 3 et 6 vont se rompre et la dalle 15 pourra alors se décoller complètement de la dalle 14 et se déplacer légèrement vers la gauche grâce au déplacement des tenons 5, de la dalle 14 à l'intérieur des mortaises 10, de la dalle 15. Ce déplacement s'effectuera de façon beaucoup plus souple et sans accrochages ou retenue par des parties rouillées grâce aux mortaises 10 en matière plastique.In case of shrinkage, the temporary fastening means 9 of the sheets 3 and 6 will break and the slab 15 can then take off completely from the slab 14 and move slightly to the left by moving the tenons 5, the slab 14 inside the mortises 10, the slab 15. This displacement will be much more flexible and without clashes or retained by rusted parts through the mortises 10 of plastic.

Les charges verticales exercées sur la surface supérieure du joint selon l'invention, seront réparties de façon uniforme sur les deux bords de dalle; les déplacements verticaux seront évités par les tenons 5 et la résistance des bords supérieurs en béton est augmentée grâce aux angles obtus α des coins supérieures.The vertical loads exerted on the upper surface of the joint according to the invention will be uniformly distributed over the two slab edges; the vertical displacements will be avoided by the pins 5 and the strength of the upper edges of concrete is increased thanks to the obtuse angles α of the upper corners.

Les parties des dalles situées entre les morceaux des tenons 5 et des mortaises 10 permettent en outre la reprise des charges importantes sans jeu excessif au niveau du joint. En effet, ces parties conservent l'épaisseur totale de la dalle évitant ainsi au maximum les fissures et les amorces de rupture dans le sens longitudinal à proximité du joint.The parts of the slabs located between the pieces of the tenons 5 and mortises 10 also allow the recovery of large loads without excessive play at the joint. Indeed, these parts retain the total thickness of the slab thus avoiding as much as possible the cracks and the fracture initiators in the longitudinal direction near the seal.

La figure 7 montre en détail le façonnage du bord supérieur des tôles d'acier 3 et 8.The figure 7 shows in detail the shaping of the upper edge of steel sheets 3 and 8.

Comme déjà décrit ci-dessus, ce bord est replié sur lui- même sur toute la longueur et ensuite profilé à froid. A cet effet, on utilise un jeu de trois rouleaux dont le premier agit selon un plan horizontal H, le second selon un plan vertical V (angle de 90°) et le troisième selon un plan oblique A situé sous un angle aigu par rapport au rouleau V et laissant, par conséquent, un angle obtus α par rapport à la surface supérieure du béton. Cet angle α doit, de préférence être obtus pour conférer une résistance accrue du bord de la dalle de béton.As already described above, this edge is folded on itself over the entire length and then profiled cold. For this purpose, a set of three rollers is used, the first of which acts in a horizontal plane H, the second in a vertical plane V (angle of 90 °) and the third in an oblique plane A situated at an acute angle to the roller V and leaving, therefore, an obtuse angle α relative to the upper surface of the concrete. This angle α should preferably be obtuse to confer increased strength of the edge of the concrete slab.

La figure 8 montre le bord supérieur d'une partie du joint ainsi obtenu qui présente des coins vifs C et une surface supérieure lisse S grâce au laminage et écrouissage à froid. L'arête supérieure du joint selon l'invention est donc réalisée à partir de tôles d'acier, de 3 à 4 mm d'épaisseur, dont les bords supérieurs sont repliés sur eux- mêmes et ensuite laminé à froid de façon à obtenir une surface supérieure lisse ayant une largueur de 8 à 12 mm avec des coins vifs en acier durci grâce à la déformation à froid qui écroui la matière et la rend plus résistante.The figure 8 shows the upper edge of a portion of the joint thus obtained which has sharp corners C and a smooth upper surface S through rolling and cold working. The upper edge of the seal according to the invention is therefore made from steel sheets, 3 to 4 mm thick, whose upper edges are folded on themselves and then cold rolled to obtain a Smooth upper surface with a width of 8 to 12 mm with sharp corners made of hardened steel thanks to the cold deformation which hardens the material and makes it more resistant.

La figure 9 montre un coin de dalle en béton pourvu d'une partie du joint conforme à l'invention. La forme ainsi obtenue par le béton lors de la coulée lui confère une plus grande résistance F à l'épaufrement grâce à son angle obtus α à l'endroit de plus critique.The figure 9 shows a corner of concrete slab provided with a portion of the seal according to the invention. The shape thus obtained by the concrete during casting gives it greater resistance F to the wrinkle thanks to its obtuse angle α at the most critical place.

Grâce à l'invention, on obtient dès lors un joint pour dalles de béton dont le poids et par conséquent le coût est fortement réduit par rapport aux joints existants.Thanks to the invention, there is therefore obtained a joint for concrete slabs whose weight and therefore the cost is greatly reduced compared to existing joints.

Un autre avantage du joint selon l'invention est que la quantité d'acier nécessaire est largement réduite tout en procurant des arêtes vives renforcées et rectilignes du fait qu'ils peuvent être réalisés à partir de tôles minces en acier dont un bord est replié sur lui même et laminé à froid ce qui lui confère un aspect brillant et une résistance accrue à l'acier ainsi comprimé par rapport au bord d'une tôle épaisse cisaillée à section rugueuse ou d'un plat en acier laminé.Another advantage of the gasket according to the invention is that the quantity of steel required is greatly reduced while providing sharp edges that are reinforced and straight because they can be made from thin steel sheets, one edge of which is folded over. itself and cold rolled which gives it a glossy appearance and increased resistance to the steel thus compressed relative to the edge of a thick sheared sheet with a rough section or a rolled steel plate.

La présente description se rapporte à un exemple de réalisation mais d'autres formes de réalisations restent possibles sans pour autant sortir du cadre de la présente invention.The present description relates to an exemplary embodiment but other embodiments are possible without departing from the scope of the present invention.

Claims (12)

  1. Metal joint for concrete slabs, including means for separating the slabs (14, 15) and means allowing horizontal displacement of the slabs (14, 15) with respect to one another while avoiding vertical displacement between the edges of the slabs, the metal joint comprising:
    - a first portion (1) incorporated in a first slab (14) and comprising a vertical wall (3) with an upper edge and provided at approximately mid-height with a regularly spaced series of tenons (5) extending horizontally towards the outside of the slab (14), and
    - a second portion (2) incorporated in a second slab (15) and comprising in its upper section a wall (8) with an upper edge and a series of elements in the form of mortises (10) extending towards the inside of the second slab (15) and disposed opposite the tenons (5) so as to be able to cooperate with them, characterised in that
    the upper edges of the walls (3, 8) terminate at the top with an upper edge reinforced by a fold formed by cold-rolling to produce an increased width of the edge, the upper edges having a smooth upper surface (S) and sharp corners, with a right angle on the outer side of the slab and an edge with an acute angle (β) in contact with the concrete of the slab.
  2. Joint according to Claim 1, characterised in that the upper edge of the concrete slab in contact with the upper edge of the wall (3, 8) is formed by an obtuse angle (α) which supports the metal edge in the event of heavy loads on the joint.
  3. Joint according to Claim 1, characterised in that the upper edges are produced from sheet steel 3 to 4 mm thick having a smooth upper surface 8 to 12 mm wide with sharp corners.
  4. Joint according to Claim 1, characterised in that each tenon (5) extends on both sides of the wall of the first portion in such a way that one part extends towards the inside of the first slab (14) and the other part extends towards the outside of the slab.
  5. Joint according to Claim 1, characterised in that the mortise elements (10) of the second portion are substantially U-shaped so as to form an opening (11) able to cooperate with the corresponding tenons (5) of the first portion (1) of the joint.
  6. Joint according to Claim 3, characterised in that the mortise elements (10) are made of plastics material and are captive in the concrete of the slab (15).
  7. Joint according to Claim 1, characterised in that the walls (3, 8) of the portions (1, 2) are provided with a series of pins (6, 12) for anchoring in the concrete of the slab (14, 15).
  8. Joint according to Claim 7, characterised in that the pins (6, 12) are fixed at regular intervals to the walls (3, 8) and in that they are provided at their ends with a widened portion or head (7, 13).
  9. Joint according to Claim 1, characterised in that the first portion (1) of the joint is prolonged downwardly by a sheet metal section (4) extending vertically downwards substantially as far as the lower portion of the slab (14).
  10. Method for fabricating a metal joint for concrete slabs including means for separating the slabs and means allowing horizontal displacement of the slabs with respect to one another while avoiding vertical displacement between the edges of the slabs, the metal joint comprising
    - a first portion (1) incorporated in a first slab (14) and comprising a vertical wall (3) with an upper edge and provided at approximately mid-height with a regularly spaced series of tenons (5) extending horizontally towards the outside of the slab (14), and
    - a second portion (2) incorporated in a second slab (15) and comprising in its upper section a wall (8) with an upper edge and a series of elements in the form of mortises (10) extending towards the inside of the slab (15) and disposed opposite the tenons (5) so as to be able to cooperate with them,
    characterised in that
    the walls (3, 8) are produced from sheet steel the upper edges of which are folded back on themselves along their full length and then are cold-rolled and compressed by mechanical cold-profiling means so as to obtain an increased width of the edge and so as to obtain a right angle on the outer side of the slab and an edge with an acute angle on the inner side in contact with the concrete so as to form a smooth upper surface and sharp edges of the metal joint of the adjacent slabs (14, 15).
  11. Method according to Claim 10, characterised in that the folded upper edges of the walls (3, 8) are cold-rolled by a set of three rollers the first of which acts in a horizontal plane (H), the second in a vertical plane (V) and the third in an oblique plane (A) disposed at an acute angle (β) with respect to the vertical roller (V) and leaving an obtuse angle (α) with respect to the upper surface of the concrete.
  12. Method according to Claim 10, characterised in that the folded upper edges of the walls (3, 8) made of sheet steel are subjected to work-hardening of the material as a result of the cold-rolling.
EP05742465.7A 2004-05-19 2005-05-11 Lightweight metal joint for concrete surfaces Not-in-force EP1756367B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
BE2004/0252A BE1016053A4 (en) 2004-05-19 2004-05-19 Seal metal lightweight concrete surface.
PCT/BE2005/000073 WO2005111307A1 (en) 2004-05-19 2005-05-11 Lightweight metal joint for concrete surfaces

Publications (2)

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EP1756367A1 EP1756367A1 (en) 2007-02-28
EP1756367B1 true EP1756367B1 (en) 2016-06-15

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EP05742465.7A Not-in-force EP1756367B1 (en) 2004-05-19 2005-05-11 Lightweight metal joint for concrete surfaces

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US (1) US8091306B2 (en)
EP (1) EP1756367B1 (en)
BE (1) BE1016053A4 (en)
CA (1) CA2565724C (en)
WO (1) WO2005111307A1 (en)
ZA (1) ZA200609601B (en)

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BE1016053A4 (en) 2006-02-07
US8091306B2 (en) 2012-01-10
US20090007512A1 (en) 2009-01-08
ZA200609601B (en) 2008-05-30
CA2565724C (en) 2014-03-11
WO2005111307A1 (en) 2005-11-24
CA2565724A1 (en) 2005-11-24
EP1756367A1 (en) 2007-02-28

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