EP1045091B1 - Construction element reinforcement method - Google Patents

Construction element reinforcement method Download PDF

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Publication number
EP1045091B1
EP1045091B1 EP00401042A EP00401042A EP1045091B1 EP 1045091 B1 EP1045091 B1 EP 1045091B1 EP 00401042 A EP00401042 A EP 00401042A EP 00401042 A EP00401042 A EP 00401042A EP 1045091 B1 EP1045091 B1 EP 1045091B1
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Prior art keywords
force
absorbing
construction element
spacers
synthetic resin
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German (de)
French (fr)
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EP1045091A1 (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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    • 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

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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)
  • Working Measures On Existing Buildindgs (AREA)
  • Revetment (AREA)
  • Manufacture Of Alloys Or Alloy Compounds (AREA)
  • Reinforcement Elements For Buildings (AREA)
  • Piles And Underground Anchors (AREA)
  • Road Paving Structures (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Joining Of Building Structures In Genera (AREA)

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 reinforcing building elements such as walls, pillars or poles.

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 building elements are subjected to compressive forces due to their own mass and, possibly, to loads they must withstand, for example other structural elements of the superstructure type, vaults, walls, pillars, frameworks, 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 loads or weakening of the building element, it may be necessary to increase its ability to withstand compressive forces. Some stones or bricks constituting such building elements may deteriorate over time and see their mechanical characteristics decrease due to water infiltration or various pollutions, 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 construction element with a new element made of the same material or a different material such as reinforced concrete. However, for historical or artistic reasons, it is necessary to strengthen the building element retaining as much as possible the original element and without performing a complete disassembly extremely expensive.

Le document GB-A-2 302 896 décrit un procédé de renforcement d'une voûte ou d'une portion de voûte en particulier en maçonnerie au moyen d'un réseau de barres allongées. La structure d'origine reprend les forces de compression et maintient le réseau de barres en place, empêchant les barres de se déformer lorsqu'elles sont en compression. Les barres reprennent les forces de traction auxquelles la structure de maçonnerie ne peut pas résister et transfert lesdites forces des zones affaiblies à des zones adjacentes de compression.GB-A-2 302 896 discloses a method of reinforcing a vault or a portion of a vault, particularly in masonry, by means of a network of elongated bars. The original structure takes up compression forces and keeps the bar network in place, preventing the bars from deforming when in compression. The bars take up the tensile forces that the masonry structure can not withstand and transfer said weakened zone forces to adjacent compression areas.

Le document FR-A-2 635 550 décrit un procédé de surélévation d'immeuble dans lequel on fore des trous de l'ordre de 10 à 12 cm de diamètre pour y implanter des barres métalliques épaisses d'un diamètre légèrement inférieur au trou. Dans l'interstice entre les barres et le trou, on injecte du mortier de ciment qui a pour but d'empêcher le flambement des barres dans la hauteur d'un étage. On peut introduire un tirant horizontal à la base d'un mur de refend, qui accrocherait à la barre verticale. La présence de plancher élimine le risque de flambement sur la hauteur totale de la barre en constituant des points relativement immobiles dans l'espace.Document FR-A-2,635,550 describes a building elevation method in which holes of the order of 10 to 12 cm in diameter are drilled to implant thick metal bars with a diameter slightly smaller than the hole. In the gap between the bars and the hole, cement mortar is injected which is intended to prevent buckling of the bars in the height of a floor. A horizontal tie can be inserted at the base of a wall of the wall, which would hang on the vertical bar. The presence of floor eliminates the risk of buckling on the total height of the bar by constituting relatively immobile points in space.

La présente invention a pour objet de permettre un tel renforcement in situ et sans démontage ni remplacement complet.The present invention aims to allow such 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 construction element subjected to at least compression forces, the construction element being of the stack, post or wall, method in which is inserted inside said building element at least three non-coplanar elements for resumption of compressive forces and spacers able to prevent buckling of the elements of recovery forces, elements of recovery 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 stress recovery elements are implemented by drilling longitudinal holes in the construction 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 for taking up forces are put in place by digging longitudinal grooves in the construction element, said grooves being recapped after the installation of the elements for taking up forces, 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, a stress recovery member is made of a charged synthetic resin composition.

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, a force-absorbing element comprises a central rod and a peripheral sealing part in the hole or groove which receives it, the central rod being of the fiber-filled synthetic resin type and the peripheral part being of the type of charged synthetic resin composition.

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, an isolation layer is placed between a force-recovery element and the wall of the hole or groove that receives it, to avoid sealing of the recovery element of the efforts and the 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, a force recovery element is sealed in the wall of the hole or groove receiving it.

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 construction 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 portion being of the type of charged synthetic resin composition.

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 of recovery of forces evenly distributed in the construction element and a plurality of pairs of spacers, two spacers of a pair being parallel and at the same height, two adjacent pairs being mutually perpendicular, and are 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 may be a wall, a post or a stack, generally an element of vertical architecture, or oblique compressed, built of stone, for example partly or wholly in stone, in brick, in 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 one can have access to one end of the element, one can then drill the longitudinal holes by this end without intervening on its sides, which reduces the areas modified by the reinforcement work.

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 as non-limiting examples and illustrated by the appended drawings, in which:
  • Figure 1 is a cross-sectional view of a reinforced pillar 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 octagonal section is pierced with four longitudinal holes 2 arranged in a square and centered with respect to the pillar 1. Each hole 2 is equipped with a rod 3 of synthetic resin, for example epoxy fiber-reinforced for example glass, disposed substantially in the center of said hole 2, and a mortar or concrete epoxy resin 4 surrounding the rod 3 and in contact with the walls of the hole 2. The resin 4 is secured mechanically of the rod 3 and the walls of the hole 2 and thus ensures the sealing of the rod 3 in the hole 2. It can provide holes 2 from 100 to 120 mm in diameter with rods 3 of 30 mm in diameter. The mortar will include a mixture of epoxy resin and a filler such as sand. The concrete will include a mixture of epoxy resin, and a load 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.Alternatively, in the case where the material constituting the pillar 1 is too degraded, it can be provided to mechanically isolate the resin 4 of the wall of the hole 2. This insulation may be achieved by means of a piece of felt, plastic or a non-adherent layer, wax or grease, not shown, matching the contour of the 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 the rigidity and avoid the buckling reinforcements each formed by a rod 3 and the resin 4, spacers 5 are arranged between the holes 2. The spacers 5 are also made by drilling holes, laying an epoxy resin rod fiberglass reinforced and 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 accroît la rigidité de l'ensemble.The spacers 5 are preferably slightly inclined, at an angle of 10 to 15 °, relative to the transverse sectional plane of Figure 1. This inclination increases the rigidity of the assembly.

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.It is understood that the holes 2 are drilled from above the pillar 1 without intervening on its outer wall 1a. The holes in which the spacers 5 are arranged are drilled from said wall 1a. In this embodiment, the damage or modifications caused to the wall 1a are limited to piercing the holes for spacers which are of a relatively small diameter, for example 20 or 30 mm. The ends of these holes for spacers can then be filled with a portion of the original material of the pillar 1, or with a filling material imitating as much as possible the wall 1a. The wall 1a is almost completely preserved, which is strongly desired when it is worked, has a historical interest, artistic.

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 S 1 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 of stone, admitting a compression stress σ p = 50 kg / cm 2 and has a section S. Let S 1 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 the 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 to: 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 strength 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 obtained by the invention is therefore equal to: R = 4 x S1 x σ p.

Dans le cas où l'aire de chaque trou 2 est égal à 100 cm2, on a S 1 = 400 cm2 d'où Ra = 80 000 kg.In the case where the area of each hole 2 is equal to 100 cm 2 , S 1 = 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 disposed in the pillar 1 can resume the efforts due to a mass of 80 000 kg, the original pillar was not or no longer able to resume.

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 the spacers 5 make it possible to form a skeleton assembly of associated ladders, of high rigidity and avoiding the buckling of the reinforcements liable to cause the bursting of the bearing 1.

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 3. 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 Figure 2, is illustrated an embodiment of the invention, which differs from that of Figure 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 grooves or longitudinal grooves 7 by said walls 6a. Said rods 3 are then provided in said grooves 3. The groove 7 is then filled with resin mortar 4, giving it a desired shape, for example by means of a formwork. This form is provided so that we can then report 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 having compatible mechanical and aesthetic characteristics. For the simplicity of the drawing of Figure 2, it has not shown the spacers that 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 de résine ou en béton de résine 4 sans disposer de tige 3.In some cases, when the load to be resumed is low and / or the section available to form holes 2 or grooves 7 is important, the reinforcement can be formed only in resin mortar or resin concrete 4 without having a rod 3.

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 3 dans un renfort donné est adapté à la charge. On peut prévoir une ou plusieurs tiges 3. 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, it is possible to have a suitable number of reinforcements with a minimum of three arranged in a triangle, so as to withstand the buckling forces in all directions. . The number of reinforcements may be greater, for example up to six or eight. The number of rods 3 in a given reinforcement is adapted to the load. One or more rods 3 can be provided. Their diameter is also adapted to the load.

La fonction de la résine 4 est essentiellement de reprendre les efforts de compression, tandis que les tiges 3 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 the resin 4 is essentially to resume the compression forces, while the rods 3 allow both to resume compression efforts and to avoid buckling. The spacers 5 make it possible to avoid 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 comprises at least three reinforcements 10, only two of which are visible and made by drilling a vertical hole or a vertical groove, by laying unrepresented armed rods and a resin mortar. The reinforcements 10 are provided with spacers 11 slightly inclined relative to the horizontal. In the case where four reinforcements 10 are provided, the spacers may be arranged in alternating pairs at a given height. 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 inverted sign. The spacers of the pair disposed immediately above, will be in two vertical planes perpendicular to the previous ones, and so on.

Deux tiges 12 et 13, ou encore deux nappes de tiges, en matériau similaire aux tiges 3, 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 sheets of rods, of material similar to the rods 3, their end sealed by means of resin mortar in holes drilled in the pillar 9. These rods 12 and 13 allow to take some of the efforts compression is exerted on the pillar 9. This recovery is performed 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.The rods 12 and 13 are oblique and can be subjected to a prestress during their installation. First seal the end of the rods 12 and 13 in the pillar 9, and at their other end, not shown, it exerts a prestressing force. Sealing said other end of the rods 12 and 13 while maintaining the prestressing force, then after setting the sealing mortar, relaxes the prestressing force.

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 different seals can be made according to the method described in the French patent published under No. 2,545,132, to 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 reinforcing walls, pillars or posts that must not be disassembled and that it is desired to keep as much of the original material and surface as possible. 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)

  1. Method for the in situ reinforcement of an existing construction element (1) subjected at least to compressive and buckling forces, by inserting inside the said construction element longitudinal elements which absorb compressive forces, the compressive force-absorbing elements comprising a central rod (3) absorbing the compressive forces and a peripheral bedding portion, characterized in that at least three non-coplanar longitudinal elements and spacers (5) which are able to prevent the force-absorbing elements from buckling are inserted by cutting or drilling inside the said construction element, the force-absorbing elements and the spacers comprising a synthetic resin, the construction element being a pier, a post or a wall, the said central rod (3) preventing buckling and the peripheral bedding portion essentially having the function of absorbing the compressive forces.
  2. Method according to Claim 1, in which the force-absorbing elements are put in place by drilling longitudinal holes (2) into the construction element.
  3. Method according to Claim 1, in which the force-absorbing elements are put in place by cutting longitudinal grooves (7) into the construction element, the said grooves being plugged, after placing the force-absorbing elements, with a material similar to the original material of the construction element.
  4. Method according to any one of the preceding claims, in which a force-absorbing element consists of a reinforced synthetic resin composition.
  5. Method according to any one of the preceding claims, in which a force-absorbing element comprises a central rod (3) and a peripheral portion for bedding it in the hole or the groove which receives it. The central rod being of the fibre-reinforced synthetic resin type and the peripheral portion being of the reinforced synthetic resin composition type.
  6. Method according to any one of the preceding claims, in which an isolation layer is placed between a force-absorbing element and the wall of the hole or of the groove which receives it in order to prevent the force-absorbing element from bedding with the said wall.
  7. Method according to any one of claims 1 to 5, in which a force-absorbing element is bedded in the wall of the hole or of the groove which receives it.
  8. Method according to any one of the preceding claims, in which the spacers are put in place by drilling transverse holes into the construction element, a spacer comprising a central rod and a peripheral portion for bedding it in the hole which receives it, the central rod being of the fibre-reinforced synthetic resin type and the peripheral portion being of the reinforced synthetic resin composition type.
  9. Method according to any one of the preceding claims, in which four force-absorbing elements regularly distributed in the construction element and a plurality of pairs of spacers are arranged, two spacers of a pair being parallel and at the same height, two neighbouring pairs being mutually perpendicular and either arranged at the same height or staggered.
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

Publications (2)

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

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Application Number Title Priority Date Filing Date
EP00401042A Expired - Lifetime EP1045091B1 (en) 1999-04-16 2000-04-14 Construction element reinforcement method

Country Status (6)

Country Link
EP (1) EP1045091B1 (en)
AT (1) ATE332426T1 (en)
DE (1) DE60029159D1 (en)
ES (1) ES2267472T3 (en)
FR (1) FR2792355B1 (en)
PT (1) PT1045091E (en)

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2545132B1 (en) * 1983-04-28 1985-10-25 Renofors France PROCESS OF CONSOLIDATION OF STONE CONSTRUCTIONS
CH654060A5 (en) * 1983-10-24 1986-01-31 Rene Lacroix Beams restoration process of wood for increased their resistance.
FR2585393B1 (en) * 1985-07-29 1988-03-25 Renofors France BEAM OR OTHER STRUCTURAL ELEMENT IN WOOD REINFORCED BY A REINFORCEMENT, AND METHOD FOR THE PRODUCTION THEREOF
FR2635550B1 (en) * 1988-08-18 1991-04-26 Georges Culica PROCESS FOR OVER-LIFTING BUILDINGS
GB2302896B (en) * 1995-07-01 1997-11-05 William George Edscer Arch reinforcement
JP3018967B2 (en) * 1995-12-01 2000-03-13 鹿島建設株式会社 Reinforcement method for reinforced concrete columns
AU8736198A (en) * 1997-08-14 1999-03-08 William George Edscer Methods of reinforcing existing masonry structures

Also Published As

Publication number Publication date
EP1045091A1 (en) 2000-10-18
FR2792355A1 (en) 2000-10-20
PT1045091E (en) 2006-11-30
FR2792355B1 (en) 2007-10-12
ES2267472T3 (en) 2007-03-16
DE60029159D1 (en) 2006-08-17
ATE332426T1 (en) 2006-07-15

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