EP1045091A1 - Construction element reinforcement method - Google Patents

Construction element reinforcement method Download PDF

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Publication number
EP1045091A1
EP1045091A1 EP00401042A EP00401042A EP1045091A1 EP 1045091 A1 EP1045091 A1 EP 1045091A1 EP 00401042 A EP00401042 A EP 00401042A EP 00401042 A EP00401042 A EP 00401042A EP 1045091 A1 EP1045091 A1 EP 1045091A1
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EP
European Patent Office
Prior art keywords
elements
spacers
synthetic resin
building element
hole
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Granted
Application number
EP00401042A
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German (de)
French (fr)
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EP1045091B1 (en
Inventor
Marc-Henry Menard
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M Lefevre SA
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M Lefevre SA
M Lefevre SA
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Publication of EP1045091A1 publication Critical patent/EP1045091A1/en
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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
    • E04G23/0225—Increasing or restoring the load-bearing capacity of building construction elements of circular building elements, e.g. by circular bracing
    • 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 present invention relates to the field of reinforcement construction elements such as walls, pillars or posts.
  • Such construction elements are subjected to stresses compression due to their own mass and possibly to loads that they have to support, for example other building elements of the type superstructures, arches, walls, pillars, frames, etc.
  • the object of the present invention is to allow such a reinforcement in situ and without disassembly or complete replacement.
  • the on-site reinforcement method according to the invention is intended for an existing building element subjected to at least stresses compression, the construction element being of the pile, post or wall, process in which one inserts inside said element of construction of at least three non-coplanar elements for the recovery of compression forces and spacers capable of preventing buckling elements of resumption of efforts, elements of resumption of efforts and the spacers comprising a synthetic resin.
  • the elements of resumption of the forces are put in place by drilling longitudinal holes in the building element.
  • the elements of resumption of forces are put in place by digging grooves longitudinal in the building element, said grooves being patched up after the installation of the force recovery elements, with a material similar to the original material of the building element.
  • an element of resumption of efforts consists of a synthetic resin composition loaded.
  • an element of recovery of forces includes a central rod and a peripheral part of sealing in the hole or the groove which receives it, the central rod being of the synthetic resin type loaded with fibers and the peripheral part being of the loaded synthetic resin composition type.
  • a layer isolation is put in place between a force recovery element and the wall of the hole or the groove that receives it, to avoid sealing of the force recovery element and said wall.
  • an element of resumption of forces is sealed in the wall of the hole or groove which receives.
  • the spacers are put in place by drilling transverse holes in the building element, a spacer comprising a central rod and a peripheral sealing part in the hole which receives it, the central rod being of the synthetic resin type loaded with fibers and the peripheral part being of the composition type charged synthetic resin.
  • the building element can be a wall, a post or a pile, generally an element of vertical architecture, or oblique compressed, constructed of stone, for example in part or in whole in ashlar, brick, wood.
  • the pillar 1 to section octagonal is pierced with four longitudinal holes 2 arranged in a square and centered with respect to pillar 1.
  • Each hole 2 is equipped with a rod 3 in synthetic resin, for example fiber reinforced epoxy for example of glass, arranged substantially in the center of said hole 2, and a mortar or a epoxy resin concrete 4 surrounding the rod 3 and in contact with the walls of the hole 2.
  • the resin 4 is mechanically integral with the rod 3 and the walls of the hole 2 and thus ensures the sealing of the rod 3 in the hole 2.
  • the mortar will include a mixture of epoxy resin and a charge such as sand.
  • Concrete will include a mixture of resin epoxy, and a filler such as gravel and sand.
  • This insulation can be achieved by means of a part felt, plastic or a non-adherent layer, wax or grease, not shown, matching the outline of hole 2.
  • spacers 5 are arranged between the holes 2.
  • the spacers 5 are also produced by drilling holes, installation of an epoxy resin rod reinforced with glass fibers and sealing with epoxy resin mortar.
  • the spacers 5 will preferably be slightly inclined, of a angle of 10 to 15 °, with respect to the transverse section plane of FIG. 1. This inclination increases the rigidity of the whole.
  • the holes 2 are drilled from above the pillar 1 without intervening on its outer wall 1a.
  • the holes in which are arranged the spacers 5 are drilled from said wall 1a.
  • damage or modifications to the wall 1a are limited to drilling holes for spacers which are of a diameter relatively small, for example 20 or 30 mm.
  • the ends of these holes for spacers can then be filled with part of the original material of pillar 1, or with a filling material imitating the wall 1a as much as possible.
  • the wall 1a is therefore almost entirely preserved, which is highly desired when it is worked, present historical, artistic interest.
  • the four longitudinal reinforcements arranged in pillar 1 allow the forces due to a mass of 80,000 kg, which the original pillar was unable or no longer able to take up.
  • FIG. 2 an embodiment of the invention is illustrated, which differs from that of FIG. 1 in that the pillar 6 is not accessible by one of its ends. We must therefore intervene on the side walls 6a by digging longitudinal grooves or grooves 7 through said walls 6a. Then we have in said grooves 7 rods 2. We then fill the bleeding 7 of resin mortar 4 by giving it a desired shape, by example using formwork. This form is intended so that one can then add a facing 8 covering the resin mortar 4. The facing 8 will be made with the original material of the pillar 6 or with a material with mechanical and aesthetic characteristics compatible. For the simplicity of the drawing in FIG. 2, we have not represented the spacers which are nevertheless present.
  • the reinforcement can only be formed in mortar or concrete resin 4 without having a rod 2.
  • the number reinforcements can be more important, for example up to six or eight.
  • the number of rods 2 in a given reinforcement is adapted to the load.
  • Their diameter is also adapted to the charge.
  • the function of resin 4 is essentially to take up the compression forces, while the rods 2 allow both resume compression forces and avoid buckling.
  • the spacers 5 prevent buckling.
  • the pillar 9 includes at least three reinforcements 10 of which only two are visible and made by drilling a vertical hole or a vertical groove, by laying unrepresented armed rods and a resin mortar.
  • Reinforcements 10 are provided with spacers 11 slightly inclined relative to the horizontal.
  • the spacers can be arranged in alternate pairs at a given height.
  • the spacers 11 of a pair are each arranged in a vertical plane parallel to the vertical plane of the other spacer 11, their angle of inclination with respect to the horizontal being the same or of sign reversed.
  • the spacers of the pair arranged immediately above, will be in two vertical planes perpendicular to the previous ones, and so right now.
  • Rods 12 and 13 are therefore oblique and can be subjected to a prestress during their installation. First seal the end of the rods 12 and 13 in pillar 9, then at their other end, not shown, we exerts a prestressing effort. We seal said other end of rods 12 and 13 while maintaining the prestressing force, then after setting the sealing mortar, the prestressing effort is released.
  • the present invention is particularly suitable for reinforcement of walls, pillars or posts which must not be dismantled and which we want to keep as much material and surface as possible of origin. This reinforces all or part of an element whose mechanical characteristics have decreased, for example due to a migration of mineral salts or any other cause of aging.

Abstract

The pile (6) may be of a generally square cross-section, with rounded extensions (6a) at the corners, to increase stability acting like buttresses. Each side of the pile has two square-section grooves (7) on either side of a central rib. Each recess contains a reinforcing rod (2) bedded in resin (4) and held behind a V-section sealing strip (8).

Description

La présente invention concerne le domaine du renforcement d'éléments de construction tels que des murs, des piliers ou des poteaux.The present invention relates to the field of reinforcement construction elements such as walls, pillars or posts.

De tels éléments de construction sont soumis à des efforts de compression dus à leur masse propre et, éventuellement, à des charges qu'ils doivent supporter, par exemple d'autres éléments de construction du type superstructures, voûtes, murs, piliers, charpentes, etc.Such construction elements are subjected to stresses compression due to their own mass and possibly to loads that they have to support, for example other building elements of the type superstructures, arches, walls, pillars, frames, etc.

Pour des raisons telles qu'un accroissement des charges ou un affaiblissement de l'élément de construction, il peut s'avérer nécessaire d'augmenter sa capacité à supporter les efforts de compression. Certaines pierres ou briques constituant de tels éléments de construction peuvent se détériorer au cours du temps et voir diminuer leurs caractéristiques mécaniques en raison d'infiltration d'eau ou de pollutions diverses, notamment par des sels minéraux.For reasons such as increased charges or weakening of the building element, it may be necessary increase its capacity to withstand compression forces. Some stones or bricks constituting such construction elements can be deteriorate over time and see their characteristics diminish mechanical due to water infiltration or various types of pollution, especially by mineral salts.

Dans de tels cas, on peut bien sûr procéder au remplacement de l'élément de construction par un élément neuf réalisé dans le même matériau ou dans un matériau différent tel que le béton armé. Toutefois, pour des raisons historiques ou artistiques, il s'avère nécessaire de renforcer l'élément de construction en conservant le plus possible l'élément d'origine et sans procéder à un démontage complet extrêmement coûteux.In such cases, it is of course possible to replace the building element by a new element made in the same material or in a different material such as reinforced concrete. However, for historical or artistic reasons, it is necessary to reinforce the building element while keeping as much as possible the original element and without carrying out a complete disassembly extremely expensive.

La présente invention a pour objet de permettre un tel renforcement in situ et sans démontage ni remplacement complet.The object of the present invention is to allow such a reinforcement in situ and without disassembly or complete replacement.

Le procédé de renforcement sur site, selon l'invention, est destiné à un élément de construction existant soumis au moins à des efforts de compression, l'élément de construction étant du type pile, poteau ou mur, procédé dans lequel on insère à l'intérieur du dit élément de construction au moins trois éléments non-coplanaires de reprise des efforts de compression et des entretoises aptes à prévenir le flambement des éléments de reprise des efforts, les éléments de reprise des efforts et les entretoises comprenant une résine synthétique.The on-site reinforcement method according to the invention is intended for an existing building element subjected to at least stresses compression, the construction element being of the pile, post or wall, process in which one inserts inside said element of construction of at least three non-coplanar elements for the recovery of compression forces and spacers capable of preventing buckling elements of resumption of efforts, elements of resumption of efforts and the spacers comprising a synthetic resin.

Dans un mode de réalisation de l'invention, les éléments de reprise des efforts sont mis en place par forage de trous longitudinaux dans l'élément de construction.In one embodiment of the invention, the elements of resumption of the forces are put in place by drilling longitudinal holes in the building element.

Dans un autre mode de réalisation de l'invention, les éléments de reprise des efforts sont mis en place par creusement de rainures longitudinales dans l'élément de construction, les dites rainures étant rebouchées après la pose des éléments de reprise des efforts, avec un matériau semblable au matériau d'origine de l'élément de construction.In another embodiment of the invention, the elements of resumption of forces are put in place by digging grooves longitudinal in the building element, said grooves being patched up after the installation of the force recovery elements, with a material similar to the original material of the building element.

Dans un mode de réalisation de l'invention, un élément de reprise des efforts est constitué d'une composition de résine synthétique chargée.In one embodiment of the invention, an element of resumption of efforts consists of a synthetic resin composition loaded.

Dans un autre mode de réalisation de l'invention, un élément de reprise des efforts comprend une tige centrale et une partie périphérique de scellement dans le trou ou la rainure qui le reçoit, la tige centrale étant du type résine synthétique chargée de fibres et la partie périphérique étant du type composition de résine synthétique chargée.In another embodiment of the invention, an element of recovery of forces includes a central rod and a peripheral part of sealing in the hole or the groove which receives it, the central rod being of the synthetic resin type loaded with fibers and the peripheral part being of the loaded synthetic resin composition type.

Dans un mode de réalisation de l'invention, une couche d'isolement est mise en place entre un élément de reprise des efforts et la paroi du trou ou de la rainure qui le reçoit, pour éviter le scellement de l'élément de reprise des efforts et de la dite paroi.In one embodiment of the invention, a layer isolation is put in place between a force recovery element and the wall of the hole or the groove that receives it, to avoid sealing of the force recovery element and said wall.

Dans un autre mode de réalisation de l'invention, un élément de reprise des efforts est scellé dans la paroi du trou ou de la rainure qui le reçoit.In another embodiment of the invention, an element of resumption of forces is sealed in the wall of the hole or groove which receives.

Avantageusement, les entretoises sont mises en place par forage de trous transversaux dans l'élément de construction, une entretoise comprenant une tige centrale et une partie périphérique de scellement dans le trou qui la reçoit, la tige centrale étant du type résine synthétique chargée de fibres et la partie périphérique étant du type composition de résine synthétique chargée.Advantageously, the spacers are put in place by drilling transverse holes in the building element, a spacer comprising a central rod and a peripheral sealing part in the hole which receives it, the central rod being of the synthetic resin type loaded with fibers and the peripheral part being of the composition type charged synthetic resin.

Avantageusement, on dispose quatre éléments de reprise des efforts régulièrement répartis dans l'élément de construction et une pluralités de paires d'entretoises, deux entretoises d'une paire étant parallèles et à la même hauteur, deux paires voisines étant mutuellement perpendiculaires, et soit disposées à la même hauteur, soit décalées.Advantageously, there are four elements for resuming the efforts regularly distributed in the building element and a pluralities of pairs of spacers, two spacers of one pair being parallel and at the same height, two neighboring pairs being mutually perpendicular, and either arranged at the same height, or offset.

L'élément de construction peut être un mur, un poteau ou une pile, de façon générale un élément d'architecture vertical, ou oblique comprimé, construit en pierre, par exemple en partie ou en totalité en pierre de taille, en brique, en bois.The building element can be a wall, a post or a pile, generally an element of vertical architecture, or oblique compressed, constructed of stone, for example in part or in whole in ashlar, brick, wood.

Lorsqu'on peut avoir accès à une extrémité de l'élément, on peut alors forer les trous longitudinaux par cette extrémité sans intervenir sur ses côtés, ce qui permet de réduire les surfaces modifiées par les travaux de renforcement.When you can access one end of the element, you can then drill the longitudinal holes through this end without intervening on its sides, which makes it possible to reduce the surfaces modified by the works reinforcement.

La présente invention sera mieux comprise à l'étude de la description détaillée de quelques modes de réalisation pris à titre d'exemples nullement limitatifs et illustrés par les dessins annexés, sur lesquels :

  • la figure 1 est une vue en coupe transversale d'un pilier renforcé par le procédé conforme à l'invention;
  • la figure 2 montre une variante de la figure 1; et
  • la figure 3 est une vue en coupe longitudinale d'un pilier renforcé conformément à l'invention.
    • The present invention will be better understood on studying the detailed description of some embodiments taken by way of non-limiting examples and illustrated by the appended drawings, in which:
  • Figure 1 is a cross-sectional view of a pillar reinforced by the method according to the invention;
  • Figure 2 shows a variant of Figure 1; and
  • Figure 3 is a longitudinal sectional view of a reinforced pillar according to the invention.

    • Comme on peut le voir sur la figure 1, le pilier 1 à section octogonale est percé de quatre trous longitudinaux 2 disposés en carré et centrés par rapport au pilier 1. Chaque trou 2 est équipé d'une tige 3 en résine synthétique, par exemple époxyde armée de fibres par exemple de verre, disposée sensiblement au centre dudit trou 2, et d'un mortier ou d'un béton de résine époxyde 4 entourant la tige 3 et en contact avec les parois du trou 2. La résine 4 est solidaire mécaniquement de la tige 3 et des parois du trou 2 et assure ainsi le scellement de la tige 3 dans le trou 2. On peut prévoir des trous 2 de 100 à 120 mm de diamètre avec des tiges 3 de 30 mm de diamètre. Le mortier comprendra un mélange de résine époxyde et d'une charge telle que du sable. Le béton comprendra un mélange de résine époxyde, et d'une charge telle que du gravier et du sable.As can be seen in Figure 1, the pillar 1 to section octagonal is pierced with four longitudinal holes 2 arranged in a square and centered with respect to pillar 1. Each hole 2 is equipped with a rod 3 in synthetic resin, for example fiber reinforced epoxy for example of glass, arranged substantially in the center of said hole 2, and a mortar or a epoxy resin concrete 4 surrounding the rod 3 and in contact with the walls of the hole 2. The resin 4 is mechanically integral with the rod 3 and the walls of the hole 2 and thus ensures the sealing of the rod 3 in the hole 2. We can provide holes 2 from 100 to 120 mm in diameter with rods 3 from 30 mm of diameter. The mortar will include a mixture of epoxy resin and a charge such as sand. Concrete will include a mixture of resin epoxy, and a filler such as gravel and sand.

    A titre de variante, dans le cas où le matériau constituant le pilier 1 est trop dégradé, on pourra prévoir d'isoler mécaniquement la résine 4 de la paroi du trou 2. Cette isolation pourra être réalisée au moyen d'une pièce de feutre, de plastique ou d'une couche non adhérente, de cire ou de graisse, non représentée, épousant le contour du trou 2.As a variant, in the case where the material constituting the pillar 1 is too degraded, provision may be made to mechanically isolate the resin 4 from the wall of hole 2. This insulation can be achieved by means of a part felt, plastic or a non-adherent layer, wax or grease, not shown, matching the outline of hole 2.

    Pour assurer la rigidité et éviter le flambement des renforts formés chacun par une tige 3 et la résine 4, des entretoises 5 sont disposées entre les trous 2. Les entretoises 5 sont également réalisées par forage de trous, pose d'une tige de résine époxy armée de fibres de verre et scellement au mortier de résine époxy.To ensure rigidity and avoid buckling of reinforcements each formed by a rod 3 and the resin 4, spacers 5 are arranged between the holes 2. The spacers 5 are also produced by drilling holes, installation of an epoxy resin rod reinforced with glass fibers and sealing with epoxy resin mortar.

    Les entretoises 5 seront de préférence légèrement inclinées, d'un angle de 10 à 15°, par rapport au plan transversal de coupe de la figure 1. Cette inclinaison accroít la rigidité de l'ensemble.The spacers 5 will preferably be slightly inclined, of a angle of 10 to 15 °, with respect to the transverse section plane of FIG. 1. This inclination increases the rigidity of the whole.

    On comprend que les trous 2 sont forés par le dessus du pilier 1 sans intervenir sur sa paroi extérieure 1a. Les trous dans lesquels sont disposées les entretoises 5 sont forés à partir de ladite paroi 1a. Dans ce mode de réalisation, les dommages ou modifications causés à la paroi 1a sont limités au percement des trous pour entretoises qui sont d'un diamètre relativement faible, par exemple de 20 ou 30 mm. Les extrémités de ces trous pour entretoises peuvent ensuite être rebouchés avec une partie du matériau d'origine du pilier 1, ou avec un matériau de rebouchage imitant le plus possible la paroi 1a. La paroi 1a est donc presque intégralement préservée, ce qui est vivement souhaité lorsqu'elle est ouvragée, présente un intérêt historique, artistique.We understand that the holes 2 are drilled from above the pillar 1 without intervening on its outer wall 1a. The holes in which are arranged the spacers 5 are drilled from said wall 1a. In this embodiment, damage or modifications to the wall 1a are limited to drilling holes for spacers which are of a diameter relatively small, for example 20 or 30 mm. The ends of these holes for spacers can then be filled with part of the original material of pillar 1, or with a filling material imitating the wall 1a as much as possible. The wall 1a is therefore almost entirely preserved, which is highly desired when it is worked, present historical, artistic interest.

    Dans un exemple particulier, le pilier 1 est en pierre, admettant une contrainte de compression σp = 50 kg/cm2 et présente une section S. Soit S1 la section des quatre renforts formés de mortier de résine époxy 4 et de tiges 3, admettant une contrainte de compression σr = 250 kg/cm2.In a particular example, the pillar 1 is made of stone, admitting a compression stress σ p = 50 kg / cm 2 and has a section S. Let S1 be the section of the four reinforcements formed of epoxy resin mortar 4 and rods 3, admitting a compressive stress σ r = 250 kg / cm 2 .

    La résistance d'origine Ro du pilier 1 est égale à : Ro = S x σp .The original resistance R o of pillar 1 is equal to: R o = S x σ p .

    Après le renforcement, la résistance Rp du pilier est égale : Rp = (S-S1) x σp + S1 x σr.After the reinforcement, the resistance R p of the pillar is equal: R p = (S-S1) x σ p + S1 x σ r .

    Dans notre exemple, on a σr = 5 x σp, d'où la résistance du pilier renforcé : Rp = S x σp + 4 x S1 x σp.In our example, we have σ r = 5 x σ p , hence the resistance of the reinforced pillar: R p = S x σ p + 4 x S1 x σ p .

    La résistance additionnelle Ra obtenue grâce à l'invention, est donc égale à : Ra = 4 x S1 x σp.The additional resistance R a obtained thanks to the invention is therefore equal to: R a = 4 x S1 x σ p .

    Dans le cas où l'aire de chaque trou 2 est égal à 100 cm2, on a S1 = 400 cm2 d'où Ra = 80 000 kg. In the case where the area of each hole 2 is equal to 100 cm 2 , we have S1 = 400 cm 2 from where R a = 80,000 kg.

    On comprend que les quatre renforts longitudinaux disposés dans le pilier 1 permettent de reprendre les efforts dus à une masse de 80 000 kg, que le pilier d'origine n'était pas ou plus capable de reprendre.It is understood that the four longitudinal reinforcements arranged in pillar 1 allow the forces due to a mass of 80,000 kg, which the original pillar was unable or no longer able to take up.

    La disposition en carré desdits renforts et la présence des entretoises 5, permettent de former un ensemble en squelette d'échelles associées, de grande rigidité et évitant le flambement des renforts susceptible de provoquer l'éclatement du palier 1.The square arrangement of said reinforcements and the presence of spacers 5, used to form a skeleton set of scales associated, of great rigidity and avoiding buckling of the reinforcements likely to cause the bearing 1 to burst.

    Sur la figure 2, est illustré un mode de réalisation de l'invention, qui diffère de celui de la figure 1 en ce que le pilier 6 n'est pas accessible par l'une de ses extrémités. On doit donc intervenir sur les parois latérales 6a en creusant des saignées ou rainures longitudinales 7 par lesdites parois 6a. Puis on dispose dans lesdites saignées 7 des tiges 2. On remplit ensuite la saignée 7 de mortier de résine 4 en lui conférant une forme voulue, par exemple au moyen d'un coffrage. Cete forme est prévue pour que l'on puisse rapporter ensuite un parement 8 recouvrant le mortier de résine 4. Le parement 8 sera réalisé avec le matériau d'origine du pilier 6 ou avec un matériau présentant des caractéristiques mécaniques et esthétiques compatibles. Pour la simplicité du dessin de la figure 2, on n'a pas représenté les entretoises qui sont néanmoins présentes.In FIG. 2, an embodiment of the invention is illustrated, which differs from that of FIG. 1 in that the pillar 6 is not accessible by one of its ends. We must therefore intervene on the side walls 6a by digging longitudinal grooves or grooves 7 through said walls 6a. Then we have in said grooves 7 rods 2. We then fill the bleeding 7 of resin mortar 4 by giving it a desired shape, by example using formwork. This form is intended so that one can then add a facing 8 covering the resin mortar 4. The facing 8 will be made with the original material of the pillar 6 or with a material with mechanical and aesthetic characteristics compatible. For the simplicity of the drawing in FIG. 2, we have not represented the spacers which are nevertheless present.

    Dans certains cas, lorsque la charge à reprendre est faible et/ou que la section disponible pour former des trous 2 ou des saignées 7 est importante, on peut former le renfort uniquement en mortier ou en béton de résine 4 sans disposer de tige 2.In certain cases, when the load to be resumed is low and / or that the section available to form holes 2 or grooves 7 is important, the reinforcement can only be formed in mortar or concrete resin 4 without having a rod 2.

    Bien entendu et en fonction de la charge à reprendre et de la forme de la section transversale du pilier, on peut disposer un nombre adapté de renforts avec un minimum de trois disposés en triangle, de façon à résister aux efforts de flambement dans toutes les directions. Le nombre de renforts peut être plus important, par exemple jusqu'à six ou huit. Le nombre de tiges 2 dans un renfort donné est adapté à la charge. On peut prévoir une ou plusieurs tiges 2. Leur diamètre est également adapté à la charge.Of course and depending on the load to be resumed and the shape of the cross section of the pillar, we can have a number adapted from reinforcements with a minimum of three arranged in a triangle, so to resist buckling forces in all directions. The number reinforcements can be more important, for example up to six or eight. The number of rods 2 in a given reinforcement is adapted to the load. We can provide one or more rods 2. Their diameter is also adapted to the charge.

    La fonction de la résine 4 est essentiellement de reprendre les efforts de compression, tandis que les tiges 2 permettent à la fois de reprendre les efforts de compression et d'éviter le flambement. Les entretoises 5 permettent d'éviter le flambement. The function of resin 4 is essentially to take up the compression forces, while the rods 2 allow both resume compression forces and avoid buckling. The spacers 5 prevent buckling.

    Dans le mode de réalisation illustré sur la figure 3, le pilier 9 comprend au moins trois renforts 10 dont seuls deux sont visibles et réalisés par forage d'un trou vertical ou d'une rainure verticale, par pose de tiges armées non représentées et d'un mortier de résine. Les renforts 10 sont pourvus d'entretoises 11 légèrement inclinées par rapport à l'horizontal. Dans le cas où quatre renforts 10 sont prévus, les entretoises peuvent être disposées par paires alternées à une hauteur donnée. En d'autres termes, les entretoises 11 d'une paire sont chacune disposées dans un plan vertical parallèle au plan vertical de l'autre entretoise 11, leur angle d'inclinaison par rapport à l'horizontale étant le même ou de signe inversé. Les entretoises de la paire disposée immédiatement au-dessus, seront dans deux plans verticaux perpendiculaires aux précédents, et ainsi de suite.In the embodiment illustrated in FIG. 3, the pillar 9 includes at least three reinforcements 10 of which only two are visible and made by drilling a vertical hole or a vertical groove, by laying unrepresented armed rods and a resin mortar. Reinforcements 10 are provided with spacers 11 slightly inclined relative to the horizontal. In the case where four reinforcements 10 are provided, the spacers can be arranged in alternate pairs at a given height. In in other words, the spacers 11 of a pair are each arranged in a vertical plane parallel to the vertical plane of the other spacer 11, their angle of inclination with respect to the horizontal being the same or of sign reversed. The spacers of the pair arranged immediately above, will be in two vertical planes perpendicular to the previous ones, and so right now.

    Deux tiges 12 et 13, ou encore deux nappes de tiges, en matériau similaire aux tiges 2, ont leur extrémité scellée au moyen de mortier de résine dans des trous forés dans le pilier 9. Ces tiges 12 et 13 permettent de reprendre une partie des efforts de compression s'exerçant sur le pilier 9. Cette reprise est effectuée par d'autres éléments de construction adjacents tels que des murs capables de supporter cette charge supplémentaire.Two rods 12 and 13, or two plies of rods, made of material similar to rods 2, have their ends sealed with mortar resin in holes drilled in the pillar 9. These rods 12 and 13 allow resume some of the compression forces exerted on pillar 9. This recovery is carried out by other adjacent building elements such as walls capable of supporting this additional load.

    Les tiges 12 et 13 sont donc obliques et peuvent être soumises à une précontrainte lors de leur pose. On scelle d'abord l'extrémité des tiges 12 et 13 dans le pilier 9, puis à leur autre extrémité, non représentée, on exerce un effort de précontrainte. On scelle ladite autre extrémité des tiges 12 et 13 en maintenant l'effort de précontrainte, puis après prise du mortier de scellement, on relâche l'effort de précontrainte.Rods 12 and 13 are therefore oblique and can be subjected to a prestress during their installation. First seal the end of the rods 12 and 13 in pillar 9, then at their other end, not shown, we exerts a prestressing effort. We seal said other end of rods 12 and 13 while maintaining the prestressing force, then after setting the sealing mortar, the prestressing effort is released.

    Les différents scellements pourrront être effectués d'après le procédé décrit dans le brevet français publié sous le n° 2 545 132, auquel le lecteur est invité à se référer.The various seals could be carried out according to the process described in the French patent published under No. 2,545,132, in which the reader is invited to refer.

    La présente invention est particulièrement adaptée au renforcement de murs, piliers ou poteaux ne devant pas être démontés et dont on souhaite conserver le plus possible du matériau et de la surface d'origine. On renforce ainsi tout ou partie d'un élément dont les caractéristiques mécaniques ont diminué, par exemple en raison d'une migration de sels minéraux ou de toute autre cause de vieillissement.The present invention is particularly suitable for reinforcement of walls, pillars or posts which must not be dismantled and which we want to keep as much material and surface as possible of origin. This reinforces all or part of an element whose mechanical characteristics have decreased, for example due to a migration of mineral salts or any other cause of aging.

    Claims (9)

    Procédé de renforcement sur site d'un élément de construction (1) existant soumis au moins à des efforts de compression et de flambement, l'élément de construction étant du type pile, poteau ou mur, dans lequel on insère à l'intérieur du dit élément de construction au moins trois éléments non-coplanaires de reprise des efforts de compression et des entretoises (5) aptes à prévenir le flambement des éléments de reprise des efforts, les éléments de reprise des efforts et les entretoises comprenant une résine synthétique.Method for reinforcing a building element on site (1) existing subject to at least compression and buckling, the construction element being of the pile, post or wall type, in which we insert inside said building element at least three non-coplanar elements for resuming compression forces and spacers (5) capable of preventing buckling of the recovery elements forces, the elements of force recovery and the spacers comprising a synthetic resin. Procédé selon la revendication 1, dans lequel les éléments de reprise des efforts sont mis en place par forage de trous longitudinaux (2) dans l'élément de construction.The method of claim 1, wherein the elements of resumption of the forces are put in place by drilling longitudinal holes (2) in the building element. Procédé selon la revendication 1, dans lequel les éléments de reprise des efforts sont mis en place par creusement de rainures longitudinales (7) dans l'élément de construction, les dites rainures étant rebouchées après la pose des éléments de reprise des efforts, avec un matériau semblable au matériau d'origine de l'élément de construction.The method of claim 1, wherein the elements of resumption of forces are put in place by digging grooves longitudinal (7) in the building element, said grooves being patched up after the installation of the force recovery elements, with a material similar to the original material of the building element. Procédé selon l'une quelconque des revendications précédentes, dans lequel un élément de reprise des efforts est constitué d'une composition de résine synthétique chargée.Method according to any of the claims previous, in which a force recovery element is constituted of a charged synthetic resin composition. Procédé selon l'une quelconque des revendications précédentes, dans lequel un élément de reprise des efforts comprend une tige centrale (2) et une partie périphérique de scellement dans le trou ou la rainure qui le reçoit, la tige centrale étant du type résine synthétique chargée de fibres et la partie périphérique étant du type composition de résine synthétique chargée.Method according to any of the claims previous, in which a force recovery element comprises a central rod (2) and a peripheral sealing part in the hole or the groove which receives it, the central rod being of the synthetic resin type loaded with fibers and the peripheral part being of the composition type charged synthetic resin. Procédé selon l'une quelconque des revendications précédentes, dans lequel une couche d'isolement est mise en place entre un élément de reprise des efforts et la paroi du trou ou de la rainure qui le reçoit, pour éviter le scellement de l'élément de reprise des efforts et de la dite paroi.Method according to any of the claims previous, in which an insulation layer is placed between a force-absorbing element and the wall of the hole or of the groove which receives, to avoid the sealing of the force recovery element and the said wall. Procédé selon l'une quelconque des revendications 1 à 5, dans lequel un élément de reprise des efforts est scellé dans la paroi du trou ou de la rainure qui le reçoit. Process according to any one of Claims 1 to 5, in which a force recovery element is sealed in the wall of the hole or of the groove that receives it. Procédé selon l'une quelconque des revendications précédentes, dans lequel les entretoises sont mises en place par forage de trous transversaux dans l'élément de construction, une entretoise comprenant une tige centrale et une partie périphérique de scellement dans le trou qui la reçoit, la tige centrale étant du type résine synthétique chargée de fibres et la partie périphérique étant du type composition de résine synthétique chargée.Method according to any of the claims previous ones, in which the spacers are put in place by drilling transverse holes in the building element, a spacer comprising a central rod and a peripheral sealing part in the hole which receives it, the central rod being of the synthetic resin type loaded with fibers and the peripheral part being of the composition type charged synthetic resin. Procédé selon l'une quelconque des revendications précédentes, dans lequel on dispose quatre éléments de reprise des efforts régulièrement répartis dans l'élément de construction et une pluralités de paires d'entretoises, deux entretoises d'une paire étant parallèles et à la même hauteur, deux paires voisines étant mutuellement perpendiculaires, et soit disposées à la même hauteur, soit décalées.Method according to any of the claims previous ones, in which there are four elements of force recovery regularly distributed in the building element and a plurality of pairs of spacers, two spacers of a pair being parallel and at the same height, two neighboring pairs being mutually perpendicular, and either arranged at the same height or offset.
    EP00401042A 1999-04-16 2000-04-14 Construction element reinforcement method Expired - Lifetime EP1045091B1 (en)

    Applications Claiming Priority (2)

    Application Number Priority Date Filing Date Title
    FR9904843 1999-04-16
    FR9904843A FR2792355B1 (en) 1999-04-16 1999-04-16 METHOD FOR REINFORCING A BUILDING ELEMENT

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    EP1045091A1 true EP1045091A1 (en) 2000-10-18
    EP1045091B1 EP1045091B1 (en) 2006-07-05

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    AT (1) ATE332426T1 (en)
    DE (1) DE60029159D1 (en)
    ES (1) ES2267472T3 (en)
    FR (1) FR2792355B1 (en)
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    Citations (7)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    FR2545132A1 (en) * 1983-04-28 1984-11-02 Renofors France Method for securing stone constructions
    EP0141782A2 (en) * 1983-10-24 1985-05-15 René Lacroix Method for the restoration of beams for giving them a higher resistance
    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
    FR2635550A1 (en) * 1988-08-18 1990-02-23 Georges Culica Method for raising buildings
    GB2302896A (en) * 1995-07-01 1997-02-05 William George Edscer Arch reinforcement
    JPH09151612A (en) * 1995-12-01 1997-06-10 Kajima Corp Reinforcing method for reinforced concrete column
    WO1999009277A1 (en) * 1997-08-14 1999-02-25 William George Edscer Methods of reinforcing existing masonry structures

    Patent Citations (7)

    * Cited by examiner, † Cited by third party
    Publication number Priority date Publication date Assignee Title
    FR2545132A1 (en) * 1983-04-28 1984-11-02 Renofors France Method for securing stone constructions
    EP0141782A2 (en) * 1983-10-24 1985-05-15 René Lacroix Method for the restoration of beams for giving them a higher resistance
    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
    FR2635550A1 (en) * 1988-08-18 1990-02-23 Georges Culica Method for raising buildings
    GB2302896A (en) * 1995-07-01 1997-02-05 William George Edscer Arch reinforcement
    JPH09151612A (en) * 1995-12-01 1997-06-10 Kajima Corp Reinforcing method for reinforced concrete column
    WO1999009277A1 (en) * 1997-08-14 1999-02-25 William George Edscer Methods of reinforcing existing masonry structures

    Non-Patent Citations (1)

    * Cited by examiner, † Cited by third party
    Title
    PATENT ABSTRACTS OF JAPAN vol. 1997, no. 103 31 October 1997 (1997-10-31) *

    Also Published As

    Publication number Publication date
    PT1045091E (en) 2006-11-30
    ATE332426T1 (en) 2006-07-15
    FR2792355A1 (en) 2000-10-20
    EP1045091B1 (en) 2006-07-05
    DE60029159D1 (en) 2006-08-17
    FR2792355B1 (en) 2007-10-12
    ES2267472T3 (en) 2007-03-16

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