EP1045091B1 - Procédé de renforcement d'un élément de construction - Google Patents

Procédé de renforcement d'un élément de construction 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
Authority
EP
European Patent Office
Prior art keywords
force
absorbing
construction element
spacers
synthetic resin
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP00401042A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1045091A1 (fr
Inventor
Marc-Henry Menard
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
M Lefevre SA
M Lefevre SA
Original Assignee
M Lefevre SA
M Lefevre SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by M Lefevre SA, M Lefevre SA filed Critical M Lefevre SA
Publication of EP1045091A1 publication Critical patent/EP1045091A1/fr
Application granted granted Critical
Publication of EP1045091B1 publication Critical patent/EP1045091B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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 reinforcing building elements such as walls, pillars or poles.
  • 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.
  • 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.
  • 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.
  • 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.
  • the present invention aims to allow such reinforcement in situ and without disassembly or complete replacement.
  • the on-site reinforcement method 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.
  • the stress recovery elements are implemented by drilling longitudinal holes in the construction element.
  • 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.
  • a stress recovery member is made of a charged synthetic resin composition.
  • 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.
  • 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.
  • a force recovery element is sealed in the wall of the hole or groove receiving it.
  • 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.
  • 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.
  • 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.
  • the material constituting the pillar 1 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • the reinforcement can be formed only in resin mortar or resin concrete 4 without having a rod 3.
  • 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.
  • 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.
  • 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.
  • the spacers may be arranged in alternating 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 inverted sign.
  • the spacers of the pair disposed immediately above, will be in two vertical planes perpendicular to the previous ones, and so on.
  • 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.
  • 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.

Landscapes

  • 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)
  • Piles And Underground Anchors (AREA)
  • Revetment (AREA)
  • Reinforcement Elements For Buildings (AREA)
  • Joining Of Building Structures In Genera (AREA)
  • Manufacture Of Alloys Or Alloy Compounds (AREA)
  • Road Paving Structures (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
EP00401042A 1999-04-16 2000-04-14 Procédé de renforcement d'un élément de construction Expired - Lifetime EP1045091B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9904843 1999-04-16
FR9904843A FR2792355B1 (fr) 1999-04-16 1999-04-16 Procede de renforcement d'un element de construction

Publications (2)

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

Family

ID=9544533

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00401042A Expired - Lifetime EP1045091B1 (fr) 1999-04-16 2000-04-14 Procédé de renforcement d'un élément de construction

Country Status (6)

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

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2545132B1 (fr) * 1983-04-28 1985-10-25 Renofors France Procede de consolidation de constructions en pierre
CH654060A5 (fr) * 1983-10-24 1986-01-31 Rene Lacroix Procede de restauration de poutres de bois permettant une augmentation de leur resistance.
FR2585393B1 (fr) * 1985-07-29 1988-03-25 Renofors France Poutre ou autre element de construction en bois renforce au moyen d'une armature, et procede pour sa realisation
FR2635550B1 (fr) * 1988-08-18 1991-04-26 Georges Culica Procede de surelevation d'immeubles
GB2302896B (en) * 1995-07-01 1997-11-05 William George Edscer Arch reinforcement
JP3018967B2 (ja) * 1995-12-01 2000-03-13 鹿島建設株式会社 鉄筋コンクリート柱の補強方法
AU8736198A (en) * 1997-08-14 1999-03-08 William George Edscer Methods of reinforcing existing masonry structures

Also Published As

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

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