EP0141782A2 - Method for the restoration of beams for giving them a higher resistance - Google Patents

Method for the restoration of beams for giving them a higher resistance Download PDF

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Publication number
EP0141782A2
EP0141782A2 EP84810503A EP84810503A EP0141782A2 EP 0141782 A2 EP0141782 A2 EP 0141782A2 EP 84810503 A EP84810503 A EP 84810503A EP 84810503 A EP84810503 A EP 84810503A EP 0141782 A2 EP0141782 A2 EP 0141782A2
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European Patent Office
Prior art keywords
bars
mass
mortar
metal
metal bar
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EP84810503A
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German (de)
French (fr)
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EP0141782A3 (en
EP0141782B1 (en
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René Lacroix
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    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G23/00—Working measures on existing buildings
    • E04G23/02—Repairing, e.g. filling cracks; Restoring; Altering; Enlarging
    • E04G23/0218—Increasing or restoring the load-bearing capacity of building construction elements
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G23/00—Working measures on existing buildings
    • E04G23/02—Repairing, e.g. filling cracks; Restoring; Altering; Enlarging
    • E04G23/0218—Increasing or restoring the load-bearing capacity of building construction elements
    • E04G2023/0248—Increasing or restoring the load-bearing capacity of building construction elements of elements made of wood
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G23/00—Working measures on existing buildings
    • E04G23/02—Repairing, e.g. filling cracks; Restoring; Altering; Enlarging
    • E04G23/0218—Increasing or restoring the load-bearing capacity of building construction elements
    • E04G2023/0251—Increasing or restoring the load-bearing capacity of building construction elements by using fiber reinforced plastic elements

Definitions

  • the reinforcement is obtained by adding reinforcements, usually metallic q ues, as in the BONES document 25 31 656 or DE PS 547 576, or by prestressing the beam , as indicated in PCT International Application No. WO 82/03647.
  • Still other techniques advocate a reinforcement based at least partially on the use of synthetic resin, in particular epoxy resin as described in documents DE AS 24 51 639 and DE PS 22 61 820.
  • the present invention presents a solution which satisfies both the technical requirements related to the reinforcement and the aesthetic requirements.
  • a considerable advantage of the present invention is that it can be applied under very difficult access conditions, which is generally the case.
  • the present invention makes it possible to take advantage of the arrow of the old beams while the known techniques simply ignore it or see> their efficiency reduced by the existence of it while modifying its original appearance.
  • the beam (1) has an arrow which is proportionately exaggerated in the drawing in order to make it more easily understandable.
  • a tongue (7) is removed and then a groove (8) is also produced, in which there is a metal bar (9) which will also be embedded in a mass of epoxy mortar (10).
  • L then creates a formwork (13) with wood of the same essence and the same age as that of the beam.
  • the formwork is adjusted so that the outside of the formwork is an extension of the beam. In order to make this adjustment as imperceptible as possible, it is possible, as shown in the drawing, to make a swallow tail (18).
  • a simple formwork (not shown) is produced at the top of the beam for the part of the mortar mass (6) which exceeds the upper surface of the beam.
  • the lower groove 8 is closed using the tongue (7).
  • Figure 2 is illustrated a variant intervening mainly in two types of situations. First when the core of the beam is reached and secondly when the removal of unhealthy wood requires amputating the beam on an entire section.
  • the replacement of the removed wood could be done only with resin or mortar poured either in the healthy walls of the beam or in a formwork produced according to the example given in the first variant.
  • the price of the epoxy resin can dissuade the contractor from choosing the renovation solution in favor of the outright replacement of the beam.
  • the second variant involves a new piece of dry wood (17) which partially occupies the space left free by the elimination of unhealthy wood.
  • the piece of dry wood is made integral by the fiberglass bars (15) which are then sealed on the one hand in healthy wood (Fig.l No 11.) and on the other hand in the piece of dry wood (17).
  • the formwork is produced as indicated in the first variant.
  • Glass fiber bars were placed vertically so that their upper end was anchored in the mortar mass comprising the 3 metal bars. These bars were divided into 19 pairs, the spaces separating each of the pairs being smaller around the supports than around the middle of the beam.
  • the overall inertia of the new resistant section represents an increase of 240% compared to the old one, (calculated as if the wood were not not reached).
  • the present invention has multiple advantages, first of all a substantial increase in resistance. j
  • the very high adaptability of the process makes it possible to carry out each renovation taking into account the particularities of the species, access, condition of the old wood, importance, location and configuration of the areas where the old wood is no longer healthy, conservation of aesthetic characteristics.
  • the present invention also finds its application when the old beam has a satisfactory static, but one wishes to reduce its modulus of elasticity to eliminate or attenuate vibrations for example.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Rod-Shaped Construction Members (AREA)
  • Apparatuses And Processes For Manufacturing Resistors (AREA)
  • Internal Circuitry In Semiconductor Integrated Circuit Devices (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)

Abstract

1. Process for the restoration of wooden beams, employing reinforcing rods, epoxy resin and epoxy mortar, during which reinforcing rods are positioned longitudinally of the beam and other reinforcing rods are disposed substantially perpendicularly of the first rods, the various reinforcing rods being positioned in seatings previously drilled in the beam and made fast with the wood by injection or pouring of resin or epoxy mortar into the interior of the seatings, characterised in that at least one metallic reinforcing rod (3, 9) is positioned in the length direction of the beam and in that glass fibre rods (15, 16) are disposed in seatings drilled beforehand in the beam, the glass fibre rods being so positioned that at least one of their ends is free and in the vicinity of the metal rod (3, 9) and in that then, by injection or pouring, the metal rod (3, 9) and the ends of the glass fibre rods (15, 16) are coated in a mortar mass (6, 10, 12), the body of each of the glass fibre rods, in its seating, being made fast with the beam by the epoxy resin.

Description

La restauration des éléments de charpente de bâtiments anciens rencontre de multiples problèmes.The restoration of structural elements of old buildings faces multiple problems.

Chaque restauration apparaît pratiquement comme un cas unique de par l'importance relative et l'interdépendance des données particulières. Cependant, l'accroissement de la résistance à la charge et l'aspect esthétique du résultat sont des données quasi permanentes.Each restoration appears practically as a unique case due to the relative importance and the interdependence of the particular data. However, the increase in load resistance and the aesthetic appearance of the result are almost permanent data.

On connaît les techniques consistant à adjoindre à la poutre existante une nouvelle poutre destinée à soulager la prer.. 3re. Les deux poutres sont rendues solidaires par des tirants vissés de part en part ou encore par des barres pénétrant dans la poutre ancienne sans la traverser comme cela est décrit dans la demande de brevet européen No 0 034 224.We know the techniques of adding to the existing beam a new beam to relieve the prer .. 3rd. The two beams are made integral by tie rods screwed right through or by bars penetrating into the old beam without crossing it as described in European patent application No. 0 034 224.

Ces deux techniques présentent des inconvénients importants lorsque la poutre ancienne a une flèche accusée. De plus leur mise en oeuvre est compromise lorsque l'espace libre au-dessus de la poutre ancienne est compté. Enfin, l'aspect original de la poutre n'est conservé que très exceptionnellement.These two techniques have significant drawbacks when the old beam has a sharp deflection. In addition, their implementation is compromised when the free space above the old beam is counted. Finally, the original appearance of the beam is only very rarely preserved.

Selon d'autres techniques, le renforcement est obtenu par l'adjonction d'armatures, en général métalli-ques, comme dans les documents DE OS 25 31 656 ou DE PS 547 576, ou encore par la mise en précontrainte de la poutre, tel que cela est indiqué dans le document PCT demande internationale No. WO 82/03647.According to other techniques, the reinforcement is obtained by adding reinforcements, usually metallic q ues, as in the BONES document 25 31 656 or DE PS 547 576, or by prestressing the beam , as indicated in PCT International Application No. WO 82/03647.

D'autres techniques encore préconisent un renforcement fondé au moins partiellement sur l'utilisation de résine synthétique, en particulier la résine époxy comme cela est exposé dans les documents DE AS 24 51 639 et DE PS 22 61 820.Still other techniques advocate a reinforcement based at least partially on the use of synthetic resin, in particular epoxy resin as described in documents DE AS 24 51 639 and DE PS 22 61 820.

Les inconvénients liés aux solutions proposées dans les deux documents ci-dessus sont abondamment exposés et critiqués dans le document DE OS 31 33 014, qui préconise une disposition d'armatures internes propres ou destinées à combattre le cisaillement des poutres en leurs appuis.The drawbacks linked to the solutions proposed in the two above documents are abundantly exposed and criticized in document DE OS 31 33 014, which recommends a provision of internal reinforcement clean or intended to combat the shearing of beams in their supports.

Hormis les inconvénients d'ordre structurel des solutions connues, il convient de souligner l'extrême difficulté, voir l'impossibilité, d'appliquer ces solutions dans des cas concrets en raison du fait qu'elles supposent une liberté totale de manoeuvre aux abords de la poutre et qu'elles impliquent, pour certaines, la nécessité de déplacer la poutre de l'endroit qu'elle occupe. Ce grief ne s'applique pas à la solution proposée dans le document DE PS 22 61 820 qui, ne s'attachant qu'à la rénovation des extrémités de la poutre, n'intervient en rien dans l'accroissement de la résistance à la flexion et se soustrait aux contraintes y relatives.Apart from the structural disadvantages of the known solutions, it is worth emphasizing the extreme difficulty, or even the impossibility, of applying these solutions in concrete cases due to the fact that they imply total freedom of maneuver around the beam and that they imply, for some, the need to move the beam from the place it occupies. This complaint does not apply to the solution proposed in document DE PS 22 61 820 which, being concerned only with the renovation of the ends of the beam, does not intervene in any way in the increase in resistance to bending and evades related constraints.

Au surplus, les techniques connues ne satisfont que très rarement l'impératif esthétique que la rénovation doit respecter par nature.In addition, known techniques only very rarely satisfy the aesthetic imperative that renovation must respect by nature.

La présente invention présente une solution qui satisfait à la fois les exigences techniques liées au renforcement et les exigences d'ordre esthétique. De plus, un avantage considérable de la présente invention est de pouvoir s'appliquer dans des conditions d'accès très difficiles ce qui est généralement le cas. En outre, la présente invention permet de tirer parti de la flèche des poutres anciennes alors que les techniques connues l'ignorent simplement ou voient >leur efficacité réduite par l'existence de celle-ci tout en modifiant son aspect original.The present invention presents a solution which satisfies both the technical requirements related to the reinforcement and the aesthetic requirements. In addition, a considerable advantage of the present invention is that it can be applied under very difficult access conditions, which is generally the case. In addition, the present invention makes it possible to take advantage of the arrow of the old beams while the known techniques simply ignore it or see> their efficiency reduced by the existence of it while modifying its original appearance.

La solution selon l'invention est exposée dans les revendications.The solution according to the invention is set out in the claims.

On va décrire ci-après à titre d'exemple une variante )d'exécution en se fondant sur le dessin où :

  • la figure 1 montre une vue latérale partiellement dégagée de la poutre,
  • la figure 2 montre l'utilisation d'une pièce de bois sec dans une poutre évidée.
An embodiment will be described below by way of example, based on the drawing in which:
  • FIG. 1 shows a partially cleared side view of the beam,
  • Figure 2 shows the use of a piece of dry wood in a hollow beam.

; Selon la variante illustrée à la figure 1, la poutre (1) présente une flèche qui est proportionnellement exagérée sur le dessin afin de rendre celui-ci plus facilement compréhensible.; According to the variant illustrated in Figure 1, the beam (1) has an arrow which is proportionately exaggerated in the drawing in order to make it more easily understandable.

On pratique, à la surface supérieure de la poutre (1), une gorge (2) destinée à recevoir les barres métalliques (3, 4 et 5) ainsi qu'une partie de la masse de mortier d'époxy (6); on peut également utiliser des profilés.Is practiced, on the upper surface of the beam (1), a groove (2) intended to receive the metal bars (3, 4 and 5) as well as part of the mass of epoxy mortar (6); profiles can also be used.

Dans la face inférieure de la poutre, on prélève une languette (7) puis on réalise également une gorge (8) dans laquelle on dispose une barre métallique (9) qui sera noyée également dans une masse de mortier d'époxy (10).In the underside of the beam, a tongue (7) is removed and then a groove (8) is also produced, in which there is a metal bar (9) which will also be embedded in a mass of epoxy mortar (10).

On perce ensuite des trous dont l'orifice supérieur débouche dans la gorge supérieure et l'orifice inférieur dans la gorge inférieure. On place dans ces trous les barres de fibres de verre (16).Holes are then drilled, the upper opening of which opens into the upper groove and the lower opening into the lower groove. The glass fiber bars (16) are placed in these holes.

L'extrémité (11) de la poutre étant supposée atteinte, on la nettoie du bois non sain ce qui laisse un espace vacant (12) .The end (11) of the beam being assumed to be reached, it is cleaned of unhealthy wood which leaves a vacant space (12).

L réalise ensuite un coffrage (13) avec du bois de même essence et même ancienneté que celui de la poutre. L'ajustement du coffrage se fait de sorte que l'extérieur du coffrage constitue le prolongement de la poutre. Afin de rendre cet ajustement aussi imperceptible que possible on peut, comme il est montré sur le dessin, réaliser une queue d'hirondelle (18).L then creates a formwork (13) with wood of the same essence and the same age as that of the beam. The formwork is adjusted so that the outside of the formwork is an extension of the beam. In order to make this adjustment as imperceptible as possible, it is possible, as shown in the drawing, to make a swallow tail (18).

Dans la partie saine de la poutre (11) on perce des trous (14) dans lesquels on loge les barres de fibres de verre (15).In the healthy part of the beam (11) holes are drilled (14) in which the fiberglass bars (15) are housed.

On réalise un coffrage simple (non représenté) au haut de la poutre pour la partie de la masse de mortier (6) qui dépasse la surface supérieure de la poutre.A simple formwork (not shown) is produced at the top of the beam for the part of the mortar mass (6) which exceeds the upper surface of the beam.

Une fois les coffrages ajustés, et toutes les barres mises en place on referme la gorge inférieure 8 à l'aide de la languette (7).Once the formwork has been adjusted, and all the bars are in place, the lower groove 8 is closed using the tongue (7).

On peut alors injecter ou couler la résine époxy ou le mortier d'époxy qui :

  • - scelle la barre métallique inférieure (9) et la languette (7), ainsi que les extrémités inférieures des barres de fibres de verre (16),
  • - scelle les barres de fibres de verre (16) dans le corps de la poutre (1),
  • - comble l'espace laissé vacant (12) et scelle le coffrage (13), les extrémités des barres métalliques (3 et 9) et des barres de fibres de verre (15),
  • - scelle les barres métalliques (3, 4 et 5) et scelle également l'extrémité supérieure des barres de fibres de verre (16).
We can then inject or pour the epoxy resin or epoxy mortar which:
  • - seals the lower metal bar (9) and the tongue (7), as well as the lower ends of the glass fiber bars (16),
  • - seals the fiberglass bars (16) in the body of the beam (1),
  • - fills the space left vacant (12) and seals the formwork (13), the ends of the metal bars (3 and 9) and the fiberglass bars (15),
  • - seals the metal bars (3, 4 and 5) and also seals the upper end of the glass fiber bars (16).

On élimine ensuite le coffrage simple situé sur le sommet de la poutre et on lave les éventuelles bavures qui.peuvent se produire le long de la languette (7) ou au raccord (18) de la poutre et du coffrage permanent.We then eliminate the simple formwork located on the top of the beam and wash any burrs that can occur along the tongue (7) or at the connector (18) of the beam and the permanent formwork.

A la figure 2 est illustrée une variante intervenant principalement dans deux types de situations. Premièrement lorsque le coeur de la poutre est atteint et deuxièmement lorsque l'élimination du bois non sain oblige à amputer la poutre sur un tronçon entier.In Figure 2 is illustrated a variant intervening mainly in two types of situations. First when the core of the beam is reached and secondly when the removal of unhealthy wood requires amputating the beam on an entire section.

L-ns ces deux cas, le remplacement du bois éliminé pourrait se faire uniquement avec de la résine ou du mortier coulé soit dans les parois saines de la poutre soit dans un coffrage réalisé selon l'exemple donné dans la première variante. Cependant, le prix de la résine d'époxy peut dissuader l'entrepeneur de choisir la solution de la rénovation au profit du remplacement pur et simple de .la poutre. Afin de pouvoir conserver au moins l'apparence extérieure originale grâce à la rénovation, la deuxième variante met en jeu une pièce neuve de bois sec (17) qui occupe partiellement l'espace laissé libre par l'élimination du bois non sain.L-ns these two cases, the replacement of the removed wood could be done only with resin or mortar poured either in the healthy walls of the beam or in a formwork produced according to the example given in the first variant. However, the price of the epoxy resin can dissuade the contractor from choosing the renovation solution in favor of the outright replacement of the beam. In order to be able to maintain at least the original external appearance thanks to the renovation, the second variant involves a new piece of dry wood (17) which partially occupies the space left free by the elimination of unhealthy wood.

Dans le cas d'une poutre dont le coeur est attaqué, il sera possible d'insérer une poutre neuve (17) de même longueur mais de section plus faible. Pour renforcer immédiatement cette nouvelle poutre on peut pratiquer comme dans la première variante et disposer des barres métalliques (3 et 9) et des barres de fibres de verre (16). Une fois la pièce neuve (17) et les barres (3, 9 et 16) mises en place on coule une masse de mortier qui enrobe cet ensemble et le rend solidaire du reste de la poutre.In the case of a beam whose core is attacked, it will be possible to insert a new beam (17) of the same length but of smaller section. To immediately reinforce this new beam, you can practice as in the first variant and have metal bars (3 and 9) and fiberglass bars (16). Once the new part (17) and the bars (3, 9 and 16) put in place, a mass of mortar is poured which coats this assembly and makes it integral with the rest of the beam.

Dans le cas d'une poutre dont un tronçon a dû être supprimé, la pièce de bois sec est rendue solidaire par les barres de fibres de verre (15) qui sont alors scellées d'une part dans le bois sain (Fig.l No 11.) et d'autre part dans la pièce de bois sec (17). L'espace entre la poutre (11) et la pièce (17) et ensuite comblé par de la résine ou du mortier. 5Le coffrage est réalisé comme indiqué dans la première variante. Ici encore, il est souhaitable de renforcer la poutre entière grâce aux barres de fibres de verre (16) et aux barres métalliques (3 et 9).In the case of a beam from which a section had to be removed, the piece of dry wood is made integral by the fiberglass bars (15) which are then sealed on the one hand in healthy wood (Fig.l No 11.) and on the other hand in the piece of dry wood (17). The space between the beam (11) and the part (17) and then filled with resin or mortar. 5The formwork is produced as indicated in the first variant. Here again, it is desirable to reinforce the entire beam using the fiberglass bars (16) and the metal bars (3 and 9).

Une poutre dont la section résistante originale était constituée de deux éléments en bois superposés ayant chacun une largeur de 24 cm et une hauteur de 38 cm (pour une portée de plus de 9 mètres) a été rénovée selon l'invention.A beam whose original resistant section consisted of two superimposed wooden elements each having a width of 24 cm and a height of 38 cm (for a span of more than 9 meters) was renovated according to the invention.

Sur la surface supérieure de la poutre, 3 barres métalliques de 24 mm de diamètre, ayant respectivement des longueurs de 10.20 m, 4.95 m et 2.60 m, ont été scellées dans un bloc de mortier d'époxy d'une section maximum de 20 cm par 11 cm de large au milieu de la poutre, décroissant progressivement pour atteindre 7 x 11 de large aux appuis.On the upper surface of the beam, 3 metal bars 24 mm in diameter, having lengths of 10.20 m, 4.95 m and 2.60 m respectively, were sealed in a block of epoxy mortar with a maximum section of 20 cm by 11 cm wide in the middle of the beam, gradually decreasing to reach 7 x 11 wide at the supports.

Des barres en fibres de verre ont été disposées verticalement de manière que leur extrémité supérieure soit ancrée dans la masse de mortier comprenant les 3 barres métalliques. Ces barres ont été réparties en 19 paires, les espaces séparant chacune des paires étant plus petits aux abords des appuis que vers le milieu de la poutre.Glass fiber bars were placed vertically so that their upper end was anchored in the mortar mass comprising the 3 metal bars. These bars were divided into 19 pairs, the spaces separating each of the pairs being smaller around the supports than around the middle of the beam.

L'inertie globale de la nouvelle section résistante, compte tenu des coefficients de sécurité prescrits par les normes (allemandes en l'espèce), représente une augmentation de 240% par rapport à l'ancienne, (calculée comme si le bois n'était pas atteint).The overall inertia of the new resistant section, taking into account the safety coefficients prescribed by the standards (German in this case), represents an increase of 240% compared to the old one, (calculated as if the wood were not not reached).

) Il va de soi que cette proportion ne peut être généralisée mais elle donne néanmoins une idée de ce que la solution, selon l'invention, peut apporter.) It goes without saying that this proportion cannot be generalized, but it nevertheless gives an idea of what the solution according to the invention can provide.

La présente invention comporte de multiples avantages dont en premier lieu un accroissement substentiel de la résistance. jLa très grande adaptabilité du procédé permet de réaliser chaque rénovation en tenant compte des particularités de l'espèce, accès, état du bois ancien, importance, localisation et configuration des zones où le bois ancien n'est plus sain, conservation des caractéristiques esthétiques.The present invention has multiple advantages, first of all a substantial increase in resistance. jThe very high adaptability of the process makes it possible to carry out each renovation taking into account the particularities of the species, access, condition of the old wood, importance, location and configuration of the areas where the old wood is no longer healthy, conservation of aesthetic characteristics.

La présente invention trouve également son application lorsque la poutre ancienne a une statique satisfaisante, mais qu'on désire réduire son module d'élasticité pour éliminer ou atténuer les vibrations par exemple.The present invention also finds its application when the old beam has a satisfactory static, but one wishes to reduce its modulus of elasticity to eliminate or attenuate vibrations for example.

Claims (12)

1. Procédé de restauration de poutres permettant une augmentation de la résistance à la charge et mettant en jeu des barres métalliques, des barres de fibres de verre, de la résine époxy et du mortier d'époxy CARACTERISE EN CE QUE l'on place une barre métallique au moins dans le sens de la longueur de la poutre et en ce que l'on dispose des barres de fibres de verre dans des logements préalablement. percés dans la poutre, les barres de fibres de verre étant placées de manière qu'une de leurs extrémités au moins soit libre et voisine de la barre métallique et en ce que l'on enrobe ensuite, par injection ou coulage, la barre métallique et les extrémités des barres de fibres de verre dans une masse de mortier, le corps de chacune des barres de fibres de verre, dans son logement, étant rendu solidaire de la poutre par de la résine époxy.1. Method for restoring beams allowing an increase in load resistance and involving metal bars, fiberglass bars, epoxy resin and epoxy mortar CHARACTERIZED IN THAT a metal bar at least in the direction of the length of the beam and in that there are glass fiber bars in housings beforehand. drilled in the beam, the glass fiber bars being placed so that at least one of their ends is free and close to the metal bar and in that the metal bar is then coated, by injection or casting the ends of the glass fiber bars in a mass of mortar, the body of each of the glass fiber bars, in its housing, being made integral with the beam by epoxy resin. 2. Procédé selon la revendication 1 caractérisé en ce que l'on dispose la barre métallique au-dessus de la poutre et en ce que l'on coule la masse de mortier enrobant cette barre sur la surface supérieure de la poutre.2. Method according to claim 1 characterized in that one places the metal bar above the beam and in that one pours the mass of mortar coating this bar on the upper surface of the beam. 3. Procédé selon la revendication 1 caractérisé en ce que l'on dispose la masse de mortier contenant une barre métallique au moins partiellement dans une gorge que l'on a préalablement pratiquée dans la partie supérieure de la poutre.3. Method according to claim 1 characterized in that there is the mass of mortar containing a metal bar at least partially in a groove that was previously practiced in the upper part of the beam. 4. Procédé selon la revendication 3 caractérisé en ce que l'on place plusieurs barres métalliques de longueurs différentes dans la masse de mortier de façon que le milieu de chacune des barres soit situé au niveau de la flèche de la poutre, les barres étant disposées par ordre ) décroissant de longueur les unes au-dessous des autres, comblant ainsi au moins partiellement le vide créé sur la partie supérieure de la poutre du fait de la flèche.4. Method according to claim 3 characterized in that several metal bars of different lengths are placed in the mortar mass so that the middle of each of the bars is located at the level of the arrow of the beam, the bars being arranged in order) decreasing in length one below the other, thus filling at least partially the void created on the upper part of the beam due to the arrow. 5. Procédé selon l'une des revendications 1 à 4 caractérisé en ce que l'on élimine des extrémités de la poutre le bois non sain et qu'on le remplace par une masse de mortier d'époxy et en ce que l'on coule ou injecte cette masse et 1 la masse enrobant la barre métallique au cours d'une seule opération, de sorte que ces deux masses n'en forment qu'une et font bloc en un seul corps.5. Method according to one of claims 1 to 4 characterized in that one eliminates from the ends of the beam the unhealthy wood and that it is replaced by a mass of epoxy mortar and in that one flows or injects this mass and 1 the mass coating the metal bar in a single operation, so that these two masses form one and form a block in one body. 6. Procédé selon la revendication 5 caractérisé en ce que l'on réalise un coffrage permanent en bois, de même essence et de même ancienneté que la poutre, dans lequel la masse de mortier destinée à remplacer le bois non sain est coulée.6. Method according to claim 5 characterized in that a permanent wooden formwork is produced, of the same essence and of the same age as the beam, in which the mass of mortar intended to replace the unhealthy wood is poured. 7. Procédé selon l'une des revendications 1 à 6 caractérisé en ce que l'on pratique, à la partie inférieure de la 5 poutre, une gorge dans laquelle on place une barre métallique que l'on noie ensuite dans une masse de résine ou de mortier.7. Method according to one of claims 1 to 6 characterized in that one practices, at the lower part of the beam, a groove in which a metal bar is placed which is then drowned in a mass of resin or mortar. B. Procédé selon la revendication 7 caractérisé en ce que lors de la création de la gorge inférieure, on prélève une ) languette de bois et en ce que l'on remet en place cette languette lorsque la barre métallique a été placée dans la gorge.B. Method according to claim 7 characterized in that during the creation of the lower groove, one takes a) wooden tongue and in that this tongue is replaced when the metal bar has been placed in the groove. 9. Procédé selon la revendication 7 caractérisé en ce que l'on perce des logements au travers de la poutre, ces logements ayant un orifice dans la gorge supérieure et dans la gorge inférieure, et en ce que l'on dispose des barres de fibres de verre dans ces logements de manière que leurs extrémités soient voisines des barres métalliques supérieure et inférieure et en ce que l'on coule ou injecte une masse de mortier qui enrobe à la fois les barres métalliques et les extrémités des barres de verre et qui assure la liaison des barres de fibres de verre avec la poutre en comblant les interstices entre le logement et la barre.9. Method according to claim 7 characterized in that the housing is pierced through the beam, these housing having an orifice in the upper groove and in the lower groove, and in that there are fiber bars of glass in these housings so that their ends are close to the upper and lower metal bars and in that a mass of mortar is poured or injected which coats both the metal bars and the ends of the glass bars and which ensures the connection of the fiberglass bars with the beam by filling the gaps between the housing and the bar. 0. Procédé selon la revendication 1 caractérisé en ce que l'on réalise des gorges dans les flancs de la poutre en prélevant des languettes et en ce que l'on dispose dans ces gorges des barres métalliques qui, une fois les languettes remises en place sont enrobées d'une masse de mortier d'époxy par injection ou coulage.0. Method according to claim 1 characterized in that one carries out grooves in the sides of the beam by taking tongues and in that one has in these grooves metal bars which, once the tongues replaced in place are coated with a mass of epoxy mortar by injection or pouring. 11. Procédé selon la revendication 1 caractérisé en ce que l'on supprime une partie au moins de la poutre et en ce qu'on la remplace par une pièce neuve de bois sec dont la liaison avec le reste ae ia poutre est réalise au moins pour une part avec des barres de fibres de verre que l'on dispose dans des logements percés à la fois dans la partie saine de la poutre et dans la pièce neuve, et en ce qu'on noie ensuite la pièce et les barres de fibres de verre dans une masse de mortier d'époxy.11. Method according to claim 1 characterized in that one removes at least part of the beam and in that it is replaced by a new piece of dry wood whose connection with the rest ae ia beam is made at least partly with fiberglass bars which are placed in housings pierced both in the sound part of the beam and in the new part, and in that the part and the fiber bars are then drowned of glass in a mass of epoxy mortar. 12. Procédé selon la revendication 1 caractérisé en ce que l'on évide au moins partiellement le centre de la poutre à partir de son sommet et en ce que l'on place une pièce neuve de bois sec dans l'évidement, la liaison entre la pièce neuve et le reste de la poutre étant ensuite assuré pour une part au moins par le coulage d'une masse de mortier ou de résine époxy.12. Method according to claim 1 characterized in that at least partially the center of the beam is hollowed out from its top and in that a new piece of dry wood is placed in the recess, the connection between the new part and the rest of the beam then being provided at least in part by pouring a mass of mortar or epoxy resin.
EP84810503A 1983-10-24 1984-10-15 Method for the restoration of beams for giving them a higher resistance Expired EP0141782B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84810503T ATE29547T1 (en) 1983-10-24 1984-10-15 PROCEDURES FOR THE RESTORATION OF CARRIERS AND INCREASING THEIR STRENGTH.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH5752/83A CH654060A5 (en) 1983-10-24 1983-10-24 Beams restoration process of wood for increased their resistance.
CH5752/83 1983-10-24

Publications (3)

Publication Number Publication Date
EP0141782A2 true EP0141782A2 (en) 1985-05-15
EP0141782A3 EP0141782A3 (en) 1985-07-03
EP0141782B1 EP0141782B1 (en) 1987-09-09

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EP84810503A Expired EP0141782B1 (en) 1983-10-24 1984-10-15 Method for the restoration of beams for giving them a higher resistance

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EP (1) EP0141782B1 (en)
AT (1) ATE29547T1 (en)
CH (1) CH654060A5 (en)
DE (1) DE3466031D1 (en)

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FR2585393A1 (en) * 1985-07-29 1987-01-30 Renofors France Beam or other construction element made of timber which is reinforced by means of a reinforcing element, and method for its manufacture
EP0462597A1 (en) * 1990-06-19 1991-12-27 REALVOTE GmbH Construction element composed of a wooden part and a part of synthetic material
GB2299828A (en) * 1995-04-12 1996-10-16 Rotafix Repairing or constructing timber beams
EP1045091A1 (en) * 1999-04-16 2000-10-18 M. Lefevre S.A. Construction element reinforcement method
FR2871089A1 (en) * 2004-06-02 2005-12-09 Christian Plee Wooden structure e.g. boarder floor, reinforcement and/or restitution method for woodwork construction field, involves forming recesses in stiffening girder, fixing girder on wooden structure, and injecting resin in recesses
EP2376724A1 (en) * 2009-01-07 2011-10-19 CFS Concrete Forming Systems Inc. Methods and apparatus for restoring, repairing, reinforcing and/or protecting structures using concrete
US9784005B2 (en) 2012-01-05 2017-10-10 Cfs Concrete Forming Systems Inc. Systems for restoring, repairing, reinforcing, protecting, insulating and/or cladding structures with locatable stand-off components
US9783991B2 (en) 2013-12-06 2017-10-10 Cfs Concrete Forming Systems Inc. Structure cladding trim components and methods for fabrication and use of same
US9790681B2 (en) 2012-01-05 2017-10-17 Cfs Concrete Forming Systems Inc. Panel-to-panel connections for stay-in-place liners used to repair structures
US9879436B2 (en) 2009-01-07 2018-01-30 Cfs Concrete Forming Systems Inc Methods and apparatus for restoring, repairing, reinforcing and/or protecting structures using concrete
US9982444B2 (en) 2014-04-04 2018-05-29 Cfs Concrete Forming Systems Inc. Liquid and gas-impermeable connections for panels of stay-in-place form-work systems
US10022825B2 (en) 2010-07-06 2018-07-17 Cfs Concrete Forming Systems Inc. Method for restoring, repairing, reinforcing, protecting, insulating and/or cladding a variety of structures
US10151119B2 (en) 2012-01-05 2018-12-11 Cfs Concrete Forming Systems Inc. Tool for making panel-to-panel connections for stay-in-place liners used to repair structures and methods for using same
US10280636B2 (en) 2007-11-09 2019-05-07 Cfs Concrete Forming Systems Inc. Connector components for form-work systems and methods for use of same
US10731333B2 (en) 2015-12-31 2020-08-04 Cfs Concrete Forming Systems Inc. Structure-lining apparatus with adjustable width and tool for same
US11180915B2 (en) 2017-04-03 2021-11-23 Cfs Concrete Forming Systems Inc. Longspan stay-in-place liners
US11512483B2 (en) 2017-12-22 2022-11-29 Cfs Concrete Forming Systems Inc. Snap-together standoffs for restoring, repairing, reinforcing, protecting, insulating and/or cladding structures

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DE3828476C2 (en) * 1988-08-22 1998-12-10 Beta Loempel Buese Gmbh Procedure for increasing or restoring the load capacity
AU2008234382A1 (en) 2007-04-02 2008-10-09 Cfs Concrete Forming Systems Inc. Methods and apparatus for providing linings on concrete structures
CA2712533C (en) 2008-01-21 2016-06-21 Octaform Systems Inc. Stay-in-place form systems for windows and other building openings
EP2398974B1 (en) 2009-02-18 2017-08-02 CFS Concrete Forming Systems Inc. Clip-on connection system for stay-in-place form-work
WO2013075250A1 (en) 2011-11-24 2013-05-30 Cfs Concrete Forming Systems Inc. Stay-in-place formwork with anti-deformation panels
CA2855742C (en) 2011-11-24 2019-10-29 Cfs Concrete Forming Systems Inc. Stay-in place formwork with engaging and abutting connections
AU2020218008A1 (en) 2019-02-08 2021-09-16 Cfs Concrete Forming Systems Inc. Retainers for restoring, repairing, reinforcing, protecting, insulating and/or cladding structures

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DE1759680A1 (en) * 1965-03-19 1971-06-16 Rehm Gallus Procedure for the subsequent reinforcement of prestressed concrete ceiling beams whose reinforcement is damaged
DE2510262A1 (en) * 1975-03-08 1976-09-09 Hans Binker Strength improvement for timber beams - uses fibre bundles and webbing embedded in grooves along longitudinal faces
GB2060044A (en) * 1979-10-05 1981-04-29 Rickards Timber Treatment Ltd Improvements in or relating to beam restoration
FR2510163A1 (en) * 1981-07-22 1983-01-28 Renofors France Reinforcing wooden beam - using resin concrete tied to beam top increasing design load
DE3133014A1 (en) * 1981-08-20 1983-03-10 Lömpel-Bautenschutz GmbH + Co KG, 8725 Arnstein Method of restoring wooden beams

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DE1759680A1 (en) * 1965-03-19 1971-06-16 Rehm Gallus Procedure for the subsequent reinforcement of prestressed concrete ceiling beams whose reinforcement is damaged
DE2510262A1 (en) * 1975-03-08 1976-09-09 Hans Binker Strength improvement for timber beams - uses fibre bundles and webbing embedded in grooves along longitudinal faces
GB2060044A (en) * 1979-10-05 1981-04-29 Rickards Timber Treatment Ltd Improvements in or relating to beam restoration
FR2510163A1 (en) * 1981-07-22 1983-01-28 Renofors France Reinforcing wooden beam - using resin concrete tied to beam top increasing design load
DE3133014A1 (en) * 1981-08-20 1983-03-10 Lömpel-Bautenschutz GmbH + Co KG, 8725 Arnstein Method of restoring wooden beams

Cited By (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2585393A1 (en) * 1985-07-29 1987-01-30 Renofors France Beam or other construction element made of timber which is reinforced by means of a reinforcing element, and method for its manufacture
EP0462597A1 (en) * 1990-06-19 1991-12-27 REALVOTE GmbH Construction element composed of a wooden part and a part of synthetic material
GB2299828A (en) * 1995-04-12 1996-10-16 Rotafix Repairing or constructing timber beams
GB2299828B (en) * 1995-04-12 1998-08-12 Rotafix Construction and repair of timber components
EP1045091A1 (en) * 1999-04-16 2000-10-18 M. Lefevre S.A. Construction element reinforcement method
FR2792355A1 (en) * 1999-04-16 2000-10-20 Lefevre Sa M METHOD FOR REINFORCING A CONSTRUCTION ELEMENT
FR2871089A1 (en) * 2004-06-02 2005-12-09 Christian Plee Wooden structure e.g. boarder floor, reinforcement and/or restitution method for woodwork construction field, involves forming recesses in stiffening girder, fixing girder on wooden structure, and injecting resin in recesses
US10280636B2 (en) 2007-11-09 2019-05-07 Cfs Concrete Forming Systems Inc. Connector components for form-work systems and methods for use of same
US9879436B2 (en) 2009-01-07 2018-01-30 Cfs Concrete Forming Systems Inc Methods and apparatus for restoring, repairing, reinforcing and/or protecting structures using concrete
US11512484B2 (en) 2009-01-07 2022-11-29 Cfs Concrete Forming Systems Inc. Methods and apparatus for restoring, repairing, reinforcing and/or protecting structures using concrete
EP2376724A4 (en) * 2009-01-07 2012-06-20 Cfs Concrete Forming Systems Inc Methods and apparatus for restoring, repairing, reinforcing and/or protecting structures using concrete
US12037801B2 (en) 2009-01-07 2024-07-16 Cfs Concrete Forming Systems Inc. Methods and apparatus for restoring, repairing, reinforcing and/or protecting structures using concrete
EP2376724A1 (en) * 2009-01-07 2011-10-19 CFS Concrete Forming Systems Inc. Methods and apparatus for restoring, repairing, reinforcing and/or protecting structures using concrete
US10662661B2 (en) 2009-01-07 2020-05-26 Cfs Concrete Forming Systems Inc. Methods and apparatus for restoring, repairing, reinforcing and/or protecting structures using concrete
US10022825B2 (en) 2010-07-06 2018-07-17 Cfs Concrete Forming Systems Inc. Method for restoring, repairing, reinforcing, protecting, insulating and/or cladding a variety of structures
US9790681B2 (en) 2012-01-05 2017-10-17 Cfs Concrete Forming Systems Inc. Panel-to-panel connections for stay-in-place liners used to repair structures
US10151119B2 (en) 2012-01-05 2018-12-11 Cfs Concrete Forming Systems Inc. Tool for making panel-to-panel connections for stay-in-place liners used to repair structures and methods for using same
US9784005B2 (en) 2012-01-05 2017-10-10 Cfs Concrete Forming Systems Inc. Systems for restoring, repairing, reinforcing, protecting, insulating and/or cladding structures with locatable stand-off components
US9783991B2 (en) 2013-12-06 2017-10-10 Cfs Concrete Forming Systems Inc. Structure cladding trim components and methods for fabrication and use of same
US10450763B2 (en) 2014-04-04 2019-10-22 Cfs Concrete Forming Systems Inc. Liquid and gas-impermeable connections for panels of stay-in-place form-work systems
US9982444B2 (en) 2014-04-04 2018-05-29 Cfs Concrete Forming Systems Inc. Liquid and gas-impermeable connections for panels of stay-in-place form-work systems
US11053676B2 (en) 2015-12-31 2021-07-06 Cfs Concrete Forming Systems Inc. Structure-lining apparatus with adjustable width and tool for same
US11499308B2 (en) 2015-12-31 2022-11-15 Cfs Concrete Forming Systems Inc. Structure-lining apparatus with adjustable width and tool for same
US10731333B2 (en) 2015-12-31 2020-08-04 Cfs Concrete Forming Systems Inc. Structure-lining apparatus with adjustable width and tool for same
US11180915B2 (en) 2017-04-03 2021-11-23 Cfs Concrete Forming Systems Inc. Longspan stay-in-place liners
US11512483B2 (en) 2017-12-22 2022-11-29 Cfs Concrete Forming Systems Inc. Snap-together standoffs for restoring, repairing, reinforcing, protecting, insulating and/or cladding structures
US11761220B2 (en) 2017-12-22 2023-09-19 Cfs Concrete Forming Systems Inc. Snap-together standoffs for restoring, repairing, reinforcing, protecting, insulating and/or cladding structures

Also Published As

Publication number Publication date
EP0141782A3 (en) 1985-07-03
ATE29547T1 (en) 1987-09-15
EP0141782B1 (en) 1987-09-09
CH654060A5 (en) 1986-01-31
DE3466031D1 (en) 1987-10-15

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