EP1849930B1 - Support arm for a modular scaffolding system as well as modular scaffolding with such an arm - Google Patents

Support arm for a modular scaffolding system as well as modular scaffolding with such an arm Download PDF

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Publication number
EP1849930B1
EP1849930B1 EP06290678.9A EP06290678A EP1849930B1 EP 1849930 B1 EP1849930 B1 EP 1849930B1 EP 06290678 A EP06290678 A EP 06290678A EP 1849930 B1 EP1849930 B1 EP 1849930B1
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EP
European Patent Office
Prior art keywords
support arm
support
shaped portions
support arms
another
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EP06290678.9A
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German (de)
French (fr)
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EP1849930A1 (en
Inventor
Hans Hofstetter
Beat Joss
Fritz Fankhauser
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Soletanche Freyssinet SA
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Soletanche Freyssinet SA
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Priority to EP06290678.9A priority Critical patent/EP1849930B1/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
    • E04G25/00—Shores or struts; Chocks
    • E04G25/02—Shores or struts; Chocks non-telescopic
    • 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
    • E04G1/00—Scaffolds primarily resting on the ground
    • E04G1/02—Scaffolds primarily resting on the ground composed essentially of members elongated in one dimension only, e.g. poles, lattice masts, with or without end portions of special form, connected together by any means
    • E04G1/12—Scaffolds primarily resting on the ground composed essentially of members elongated in one dimension only, e.g. poles, lattice masts, with or without end portions of special form, connected together by any means comprising members of special, e.g. composite, cross-section or with lugs or the like or lateral apertures for supporting or attaching other members
    • 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
    • E04G11/00—Forms, shutterings, or falsework for making walls, floors, ceilings, or roofs
    • E04G11/36—Forms, shutterings, or falsework for making walls, floors, ceilings, or roofs for floors, ceilings, or roofs of plane or curved surfaces end formpanels for floor shutterings
    • E04G11/48—Supporting structures for shutterings or frames for floors or roofs

Definitions

  • the invention relates to support arms for modular scaffolding system and modular scaffolding systems comprising such support arms.
  • the support arms and thus the modular scaffolds can support low or medium loads and these modular scaffolds are generally constructed from steel elements that are fixed to each other temporarily.
  • These known modular scaffolds are adapted to particular circumstances of a building site or land and can therefore be used only once.
  • the beams or sleepers used to build these known modular scaffolds must be individually adjusted according to their respective length, which has a major drawback.
  • their transport requires conveying means of relatively large sizes which also significantly affect the cost of transport of these modular scaffolds.
  • the known modular scaffolding systems which consist of beams or sleepers can only withstand low or medium loads, which implies that these steel constructions are subject to sometimes high loads that can irreparably damage their connection joints especially when the modular scaffolding system must support wide-span ties.
  • the present invention is intended in particular to improve the support arms of this type.
  • the subject of the invention is a support arm for a modular scaffolding system used in the structure structures, according to claim 1.
  • the Figures 1 to 5 are all support arms 1 which extend between an upper end 2 and a lower end 3 which are interconnected by an elongate metal body 4.
  • the support arms may for example vary in length 9 centimeters, 27 centimeters, 45 centimeters, 90 centimeters, 180 centimeters and 270 centimeters for the largest.
  • each elongate body 4 comprises four U-shaped portions 5 which have two integral and substantially equal and preferably perpendicular lateral branches, to the lateral branches of the U-shaped portions 5 which are directly adjacent.
  • the junction between two side branches of two U-shaped portions 5 substantially forms a rounded corner so as to enhance the strength of the support arm as a whole.
  • each support arm 1 is formed by substantially rectangular metal plates in the center of which are formed openings 6. These openings 6 open directly into the cavity formed by the four U-shaped portions 5 constituting the elongate body 4.
  • Each plate has at its outer contour a plurality of orifices, for example 8 in number, intended to receive fasteners for fixing at least one other support arm 1 for modulating said modular scaffolding system.
  • each support arm 1 comprises a metal beam 30 which extends between the U-shaped portions 5 and between the upper and lower 2 plates of the support arm.
  • pins or reinforcement members 31, 4 in number can connect the elongated beam to the rounded corners of the U-shaped portions so as to increase the strength of the support arm, particularly with respect to buckling forces.
  • the elongated beam 30 has a substantially square section whose sides are arranged with respect to the rounded corners of the side branches of the U-shaped portions 5 and whose corners are arranged opposite the middle branches of the U-shaped portions.
  • each support arm 1 may also comprise fastening means 7 for attaching handling members or other members as will be seen below.
  • the support arms 1 shown on the Figures 1 to 5 and as they are formed by their elongated body which have a section formed by four U-shaped portions are capable of supporting axial loads up to 2000kN.
  • FIGS 7 and 8 show in more detail the fastening means 7 which can be directly attached to the elongate body 4 of the support arm 1 and the figure 8 again shows the section formed by four U-shaped portions 5 whose two lateral branches are integral and substantially perpendicular to the lateral branches of the U-shaped portions directly adjacent.
  • the eight orifices of the lower plate 3 which allow attachment of the support arm 1 to another support arm so as to make the scaffold modular.
  • the figure 9 represents a module 41 which comprises four support arms 1 of equal length and which form the corners of a square while being fixed in them by holding plates 8.
  • these holding plates 8 each comprise two upper and lower arms 9 which are connected at their ends to the fastening means 7 of the support arms 1 so as to hold and fix between them the adjacent support arms 1.
  • these holding plates 8 also comprise vertical panels 10 which extend between the arms 9. As can be seen in FIG. figure 10 these panels 10 may be formed by perforated and / or curved panels which make it possible to stiffen the assembly of the module 41 thus assembled.
  • each module 41 comprises four support arms 1 which form the corners of a square and these support arms 1 are connected between them by the holding plates 8 to stiffen the assembly.
  • the figure 12 shows a detailed view of one of the support arms 1 forming the module 41, this figure 12 representing the support arm 1 and its elongated body 4 with its four U-shaped portions 5 which are interconnected or which form only one piece and above which the upper plate 2 is fixed which is itself provided with eight holes for attachment of another upper module.
  • the figure 13 shows an exemplary embodiment in which tensioning cables 11 are arranged in the opening 6 of the upper or lower plate of the support arm 1 and thus inside the elongated body 4, these tensioning cables 11 which can be tensioned so as to improve the stressing of the support arm 1 when the latter is subjected to high stresses or prestressing.
  • these tensioning cables 11 can pass through several support arms 1 when the latter are fixed to one another by means of the substantially rectangular end plates and in which the eight orifices for fixing a plurality of other modules 41.
  • the elongate body 1 may also be filled with reinforcing materials such as concrete, foam material 12, mortar or the like in order to improve the strength of the tensioned support arms or to seal the cables 11.
  • the figure 15 represents an overview of two pylons 20 formed of a plurality of modules 41 which support a horizontal and triangular reinforcing structure 15.
  • This modular scaffolding system such as that represented on the figure 15 will be explained in detail below.
  • the figure 16 shows two modules 41 which constitute the upper end portion of one of the towers 20 shown on the figure 15 for supporting the horizontal reinforcing structure 15.
  • the lower module 41 has an upper plate 2 which is directly attached and fixed to the lower plate 3 of the module 41 which is above it so as to form a modular pylon portion 20.
  • these modules 41 which are formed by four support arms 1 can also be completed by tensioning cables which in this case will be directly arranged in the elongated body 4 of each support arm 1.
  • the upper plates 2 of the upper module 41 serve for fixing two I-shaped bearing elements 13, these two I-shaped bearing elements 13 themselves serving to support a second support member 14 substantially rectangular and which is arranged perpendicular to the two support elements 13 in the form of I.
  • These two I-shaped support members or rectangular 14 are generally fixed by fasteners such as bolts or fixing screws without use welding point to improve the modularity of the entire structure.
  • the figure 17 represents a triangulated cross member 42 which forms part of the horizontal reinforcing structure 15 shown in FIG. figure 15 .
  • This triangulated cross member 42 is formed by a plurality of upper support arms 1 identical to those shown in FIGS. Figures 1 to 5 which are connected between them by a plurality of contiguous elements 16 which will be described in more detail in the following description.
  • This triangulated crossbar 42 also comprises a plurality of lower support arms 1 which are themselves connected to each other by contiguous elements 16 of the same shape as the upper contiguous elements 16 shown in FIG. figure 17 .
  • these upper and lower contiguous elements 16 are interconnected by diagonal support arms 1 which are also formed by support arms 1 identical to those shown in the drawings. Figures 1 to 5 .
  • the figure 18 shows in detail a joined element 16 which comprises at its two ends rectangular plates 16a having an opening through which can in particular pass tensioning cables which will themselves extend through the support arms 1 or more exactly elongate bodies 4 of support arms 1.
  • Each rectangular plate 16a of a joined element 16 also has eight orifices to allow their attachment to the rectangular plate of the support arms 1.
  • each joined element 16 has four base plates 17 which are traversed by two axes for fixing two rotating members 18 which also have two perforated plates of eight orifices so as to be fixed on the diagonal support arms 1 which go partially form the triangulated cross.
  • the horizontal reinforcing structure 15 comprises two triangulated sleepers 42 which rest directly on the pylons Formed by the modular elements 41, and as can be seen from figure 19 , the two triangulated crosspieces 42 are connected to each other by means of I-shaped connecting elements 20 which fixedly connect the upper contiguous elements 16 of each triangulated cross-member 42.
  • the figure 23 represents a detailed figure of the joined element 16 when the latter is connected to two lower support arms 1 and two diagonal support arms 1.
  • the figure 24 represents for its part the end of one of the towers 20 with its upper module 41 which supports the two support elements 13 in I and the perpendicular support element 14 which itself supports the end of the horizontal reinforcement structure.
  • the figure 25 represents a scaffolding system of the prior art for replacing an elevator arm while the figure 26 represents a modular scaffolding system according to the invention which also serves to replace a lift arm.
  • the scaffolding system known and represented on the figure 25 by its construction has much more carrier elements having a relatively large length, which complicates the development of the scaffold while increasing the cost of transport. Moreover, the elements constituting this known scaffold system which is in the form of pylons comprising triangulated crosspieces are not suitable for supporting heavy loads.
  • the scaffolding system according to the invention and represented on the figure 26 , because of its pylons 20 and its reinforcing structure 15 is able to withstand loads of up to 16 000kN.
  • the figure 27 represents a scaffolding system of the prior art for lifting and moving a generator while the figure 28 represents a modular scaffolding system according to the invention which is also used for lifting and moving a same generator.
  • the scaffolding system known and represented on the figure 27 by its construction, and in particular by the existence of two towers comprising triangulated crosspieces is not adapted to withstand heavy loads and also the crossbar also has a relatively large length which also complicates the development of the scaffolding while increasing the cost of transport.
  • the scaffolding system according to the invention and represented on the figure 28 by its constitution and in particular its pylons 20 and its reinforcing structure 15 is able to support and move the generator may include a weight of the order of 6 500kN and while having easy to mount pylons of by their modularity as well as the horizontal reinforcement structure that can be easily mounted or disassembled while being made of small elements.
  • the figure 29 represents another embodiment of the horizontal reinforcing structure 15.
  • the horizontal reinforcing structure 15 here comprises six triangular crosspieces 42 all identical which are aligned to form a unit which may in particular be supported by pylons 20 or a plurality of pylons 20.
  • each triangulated cross member 42 has the same number of arms of upper, lower and diagonal supports and the same number of contiguous elements 16 so as to form a preassembled unit.
  • This horizontal reinforcing structure 15 which comprises six triangulated crosspieces 42 may in particular be fixed as a unit by connecting the contiguous elements 16 to each other by beams or crosspieces which sandwich the contiguous elements 16 against each other against each other. the others so as to bring cohesion to this horizontal reinforcing structure 15.

Description

L'invention se rapporte aux bras de support pour système d'échafaudage modulaire et aux systèmes d'échafaudage modulaires comprenant de tels bras de support.The invention relates to support arms for modular scaffolding system and modular scaffolding systems comprising such support arms.

De manière connue en soi, les bras de support et donc les échafaudages modulaires peuvent supporter de faibles ou moyennes charges et ces échafaudages modulaires sont généralement construits à partir d'éléments en acier qui sont fixés les uns aux autres temporairement. Ces échafaudages modulaires connus sont adaptés à des circonstances particulières d'un chantier ou d'un terrain et ne peuvent donc être utilisés qu'une seule fois.In a manner known per se, the support arms and thus the modular scaffolds can support low or medium loads and these modular scaffolds are generally constructed from steel elements that are fixed to each other temporarily. These known modular scaffolds are adapted to particular circumstances of a building site or land and can therefore be used only once.

Par ailleurs, les poutres ou traverses servant à construire ces échafaudages modulaires connus doivent être individuellement ajustées selon leur longueur respective, ce qui présente un inconvénient majeur. De plus, leur transport nécessite des moyens de convoyage de tailles relativement importantes ce qui grève également de manière importante le coût de transport de ces échafaudages modulaires.Furthermore, the beams or sleepers used to build these known modular scaffolds must be individually adjusted according to their respective length, which has a major drawback. In addition, their transport requires conveying means of relatively large sizes which also significantly affect the cost of transport of these modular scaffolds.

Par ailleurs comme on l'a déjà mentionné ci-dessus, les systèmes d'échafaudage modulaires connus qui sont constitués de poutres ou de traverses ne peuvent supporter que de faibles ou de moyennes charges, ce qui implique que ces constructions en acier sont soumises à des charges parfois élevées susceptibles de détériorer de manière irrémédiable leurs joints de connexion notamment lorsque le système d'échafaudage modulaire doit supporter des traverses de large portée.Moreover, as already mentioned above, the known modular scaffolding systems which consist of beams or sleepers can only withstand low or medium loads, which implies that these steel constructions are subject to sometimes high loads that can irreparably damage their connection joints especially when the modular scaffolding system must support wide-span ties.

Par ailleurs, lorsque ces échafaudages modulaires sont utilisés comme dispositifs ou systèmes de levage et de déplacement, ceux-ci sont limités dans leur utilisation du fait de leur faible résistance et de plus ils engendrent des dépenses et des coûts relativement importants tant dans leur mise en place que dans leur utilisation.In addition, where these modular scaffolds are used as lifting or They are limited in their use because of their low resistance and, moreover, they generate relatively high costs and costs both in their implementation and in their use.

Enfin, dans les systèmes d'échafaudages modulaires connus, il est souvent nécessaire de pratiquer des soudures pour moduler les assemblages, ce qui comporte des désavantages importants lors du démantèlement de ces échafaudages.Finally, in known modular scaffolding systems, it is often necessary to practice welds to modulate the assemblies, which has significant disadvantages when dismantling these scaffolds.

L'un des buts de l'invention est de procurer un système d'échafaudage modulaire qui pourrait notamment remplir les critères suivants :

  • soumission à des forces de compression ou à des forces de tension allant au-delà de plusieurs milliers de tonnes ;
  • procurer un démontage ou un montage rapide ;
  • procurer un assemblage rapide et un transport ne nécessitant pas des moyens de transport important ;
  • procurer une modularité de l'assemblage qui peut être utilisée et réutilisée dans tout type de terrain ou dé chantier ; et
  • assurer la sécurité et la fiabilité du système d'échafaudage modulaire sur tous les terrains possibles.
One of the aims of the invention is to provide a modular scaffolding system which could in particular fulfill the following criteria:
  • submission to compressive forces or tensile forces exceeding several thousand tons;
  • provide quick disassembly or assembly;
  • provide fast assembly and transportation that does not require significant means of transportation;
  • provide modularity of the assembly that can be used and reused in any type of terrain or construction site; and
  • ensure the safety and reliability of the modular scaffolding system on all possible terrains.

Le document US-A-5 240 089 décrit un bras de support pour système d'échafaudage, selon le preambule de la revendication 1.The document US-A-5,240,089 describes a support arm for a scaffolding system, according to the preamble of claim 1.

La présente invention a notamment pour but de perfectionner les bras de support de ce type.The present invention is intended in particular to improve the support arms of this type.

A cet effet, l'invention a pour objet un bras de support pour système d'échafaudage modulaire utilisé dans les structures d'ouvrage, selon la revendication 1.To this end, the subject of the invention is a support arm for a modular scaffolding system used in the structure structures, according to claim 1.

Selon d'autres caractéristiques et/ou avantages de l'invention, on peut éventuellement avoir recours à l'une et/ou à l'autre des dispositions suivantes :

  • les branches latérales des deux portions en forme de U adjacentes forment des angles sensiblement égaux entre elles ;
  • les branches latérales de deux portions en forme de U adjacentes sont sensiblement perpendiculaires entre elles ;
  • la jonction entre deux branches latérales de deux portions en forme de U adjacentes forme sensiblement un angle arrondi;
  • la plaque présente une ouverture au centre du corps allongé aligné avec la poutre allongé (30);
  • au moins un picot de renfort relie la poutre allongée et l'une des jonctions entre les branches latérales de deux portions en forme de U ;
  • des moyens de fixation sont disposés le long du corps allongé pour permettre la fixation d'organes de manutention ;
  • le système d'échafaudage modulaire comprenant au moins un module comportant quatre bras de support selon l'une quelconque des revendications précédentes, les quatre bras de support ayant une longueur égale en formant les coins d'un carré tout en étant fixés entre eux par des plaques de maintien ;
  • chaque plaque de maintien est perforée et/ou ondulée ;
  • des câbles dé mise en tension sont disposés à l'intérieur du corps allongé modulaire notamment pour améliorer sa résistance aux charges sous contraintes ;
  • l'intérieur du corps allongé où sont disposés les câbles de mise en tension est rempli d'un matériau de renfort ;
  • au moins deux pylônes sont formés chacun par une pluralité de modules, les deux pylônes portant une structure de renfort horizontale et triangulée ;
  • chaque module formant l'extrémité d'un pylône (20) comprend des éléments d'appui conformés pour soutenir la structure de renfort horizontale ;
  • la structure de renfort horizontale comprend au moins une traverse triangulée formée par une pluralité de bras de support supérieurs reliés entre eux par des éléments jointifs supérieurs et par une pluralité de bras de support inférieurs reliés entre eux par des éléments jointifs inférieurs, les éléments jointifs supérieurs et inférieurs étant en outre reliés entre eux par des bras de support disposés diagonalement ;
  • la structure de renfort horizontale comprend une pluralité de traverses triangulées reliées entre elles de manière fixe par des éléments de liaison au niveau des joints supérieurs ;
  • des câbles de mise en tension sont disposés à l'intérieur des bras de support inférieurs et/ou supérieurs de la traverse triangulée pour améliorer leur résistance aux charges sous contraintes.
According to other characteristics and / or advantages of the invention, it is possible to use one and / or the other of the following provisions:
  • the lateral branches of the two adjacent U-shaped portions form substantially equal angles to each other;
  • the side branches of two adjacent U-shaped portions are substantially perpendicular to each other;
  • the junction between two lateral branches of two adjacent U-shaped portions substantially forms a rounded angle;
  • the plate has an opening in the center of the elongate body aligned with the elongated beam (30);
  • at least one reinforcing pin connects the elongated beam and one of the junctions between the side branches of two U-shaped portions;
  • fixing means are arranged along the elongate body to allow the attachment of handling members;
  • the modular scaffolding system comprising at least one module comprising four support arms according to any one of the preceding claims, the four support arms having an equal length forming the corners of a square while being secured together by holding plates;
  • each holding plate is perforated and / or corrugated;
  • tensioning cables are arranged inside the modular elongate body in particular to improve its resistance to stress loads;
  • the interior of the elongated body where the tensioning cables are arranged is filled with a reinforcing material;
  • at least two pylons are each formed by a plurality of modules, the two pylons carrying a horizontal and triangular reinforcing structure;
  • each module forming the end of a pylon (20) comprises support elements shaped to support the horizontal reinforcing structure;
  • the horizontal reinforcing structure comprises at least one triangulated cross member formed by a plurality of upper support arms interconnected by upper contiguous elements and by a plurality of lower support arms interconnected by lower contiguous elements, the upper contiguous elements and lower are further interconnected by support arms arranged diagonally;
  • the horizontal reinforcing structure comprises a plurality of triangulated crosspieces fixedly connected to one another by connecting elements at the upper joints;
  • tensioning cables are arranged inside the lower and / or upper support arms of the triangulated cross member to improve their resistance to stress loads.

L'invention sera mieux comprise à la lecture de la description qui va suivre qui donne plusieurs modes de réalisation de l'invention et qui est donné à titre d'exemples non limitatifs en se référant aux dessins dans lesquels :

  • les figures 1 à 5 représentent différents modes de réalisation de bras de support conforme à l'invention et servant au système d'échafaudage ;
  • la figure 6 représente une vue en coupe transversale de l'un des bras de support représenté sur les figures 1 à 5 ;
  • la figure 7 représente une portion de l'un des bras de support représenté sur les figures 1 à 5 ;
  • la figure 8 représente une vue en coupe transversale du bras de support représenté du la figure 7 ;
  • la figure 9 représente un module conforme à l'invention qui est adapté pour former en partie le système d'échafaudage modulaire conforme à l'invention
  • la figure 10 est une vue d'une plaque perforée et ondulée formant en partie le module tel que représenté sur la figure 9 ;
  • la figure 11 représente une vue en coupe transversale du module représenté sur la figure 9 ;
  • la figure 12 représente une vue en coupe transversale de l'un des bras de support formant le module représenté sur la figure 11 ;
  • la figure 13 représente une vue en coupe de l'un des bras de support conforme à l'invention dans lequel sont disposés des câbles de mise sous tension ;
  • la figure 14 représente une vue en coupe transversale de l'un des bras de support avec ses câbles de mise en tension et dans lequel est disposé un matériau de renfort ;
  • la figure 15 représente un système d'échafaudage modulaire conforme à l'invention ;
  • la figure 16 représente une partie de l'un des pylônes formant une partie du système d'échafaudage modulaire conforme à l'invention ;
  • la figure 17 représente une structure de renfort conforme à l'invention ;
  • la figure 18 représente en détail l'un des éléments de joint formant le système d'échafaudage modulaire conforme à l'invention ;
  • la figure 19 représente une vue en détail d'une poutrelle rassemblant deux éléments jointifs d'une structure de renfort conforme à l'invention ;
  • les figures 20 à 22 représentent des vues en perspective sous des angles différents d'un élément jointif conforme à l'invention ;
  • la figure 23 représente une vue en perspective d'un élément jointif à partir duquel s'étendent deux bras de support ;
  • la figure 24 représente une vue en perspective d'un module sur lequel sont montées des poutrelles qui supportent la structure de renfort horizontale conforme à l'invention ;
  • la figure 25 représente un système d'échafaudage de l'art antérieur servant pour le remplacement d'un bras élévateur ;
  • la figure 26 représente un système d'échafaudage modulaire conforme à l'invention pour le même système de remplacement d'un bras élévateur ;
  • la figure 27 représente un système d'échafaudage de l'art antérieur pour le levage et le déplacement d'un générateur ;
  • la figure 28 représente un système d'échafaudage modulaire conforme à l'invention pour le levage et le déplacement d'un générateur ; et
  • la figure 29 représente une structure de renfort horizontale conforme à l'invention qui comporte une pluralité de traverses triangulées conformes à l'invention.
The invention will be better understood on reading the following description which gives several embodiments of the invention and which is given as non-limiting examples with reference to the drawings in which:
  • the Figures 1 to 5 represent different embodiments of support arm according to the invention and used for the scaffolding system;
  • the figure 6 represents a cross-sectional view of one of the support arms shown on the Figures 1 to 5 ;
  • the figure 7 represents a portion of one of the support arms shown on the Figures 1 to 5 ;
  • the figure 8 represents a cross-sectional view of the support arm shown in FIG. figure 7 ;
  • the figure 9 represents a module according to the invention which is adapted to form part of the modular scaffolding system according to the invention
  • the figure 10 is a view of a perforated and corrugated plate forming in part the module as shown in FIG. figure 9 ;
  • the figure 11 represents a cross-sectional view of the module shown in FIG. figure 9 ;
  • the figure 12 represents a cross-sectional view of one of the support arms forming the module shown in FIG. figure 11 ;
  • the figure 13 represents a sectional view of one of the support arms according to the invention in which power cables are arranged;
  • the figure 14 represents a cross-sectional view of one of the support arms with its tensioning cables and in which is disposed a reinforcing material;
  • the figure 15 represents a modular scaffolding system according to the invention;
  • the figure 16 represents a part of one of the towers forming part of the modular scaffolding system according to the invention;
  • the figure 17 represents a reinforcing structure according to the invention;
  • the figure 18 represents in detail one of the joint elements forming the modular scaffolding system according to the invention;
  • the figure 19 represents a detailed view of a beam bringing together two adjoining elements of a reinforcing structure according to the invention;
  • the Figures 20 to 22 represent perspective views at different angles of a joined element according to the invention;
  • the figure 23 is a perspective view of a joined member from which two support arms extend;
  • the figure 24 is a perspective view of a module on which beams are mounted which support the horizontal reinforcing structure according to the invention;
  • the figure 25 represents a scaffolding system of the prior art used for the replacement of a lift arm;
  • the figure 26 represents a modular scaffolding system according to the invention for the same replacement system of a lift arm;
  • the figure 27 represents a scaffolding system of the prior art for lifting and moving a generator;
  • the figure 28 represents a modular scaffolding system according to the invention for lifting and moving a generator; and
  • the figure 29 represents a horizontal reinforcing structure according to the invention which comprises a plurality of triangulated sleepers according to the invention.

Sur les différentes figures, les mêmes références désignent des éléments identiques ou similaires.
Les figures 1 à 5 représentent toutes des bras de support 1 qui s'étendent entre un extrémité supérieure 2 et une extrémité inférieure 3 qui sont reliées entre elles par un corps métallique allongé 4. Dans l'exemple considéré ici, les bras de support peuvent par exemple varier en longueur de 9 centimètres, 27 centimètres, 45 centimètres, 90 centimètres, 180 centimètres et 270 centimètres pour la plus grande.In the different figures, the same references designate identical or similar elements.
The Figures 1 to 5 are all support arms 1 which extend between an upper end 2 and a lower end 3 which are interconnected by an elongate metal body 4. In the example considered here, the support arms may for example vary in length 9 centimeters, 27 centimeters, 45 centimeters, 90 centimeters, 180 centimeters and 270 centimeters for the largest.

Ces cinq bras de support 1 représentés sur les figures 1 à 5 ont tous la même section transversale qui est représentée plus en détail sur la figure 6. En effet, chaque corps allongé 4 comprend quatre portions en forme de U 5 qui présentent deux branches latérales solidaires et sensiblement égaux et préférentiellement perpendiculaires, aux branches latérales des portions en forme de U 5 qui sont directement adjacentes.These five support arms 1 represented on the Figures 1 to 5 all have the same cross section which is represented in more detail on the figure 6 . Indeed, each elongate body 4 comprises four U-shaped portions 5 which have two integral and substantially equal and preferably perpendicular lateral branches, to the lateral branches of the U-shaped portions 5 which are directly adjacent.

Par ailleurs, comme on peut toujours le voir sur la figure 6, la jonction entre deux branches latérales de deux portions en forme de U 5 forme sensiblement un angle arrondi de manière à renforcer la résistance du bras de support dans son ensemble.Moreover, as we can always see on the figure 6 the junction between two side branches of two U-shaped portions 5 substantially forms a rounded corner so as to enhance the strength of the support arm as a whole.

Par ailleurs, les extrémités supérieure 2 et inférieure 3 de chaque bras de support 1 sont formées par des plaques métalliques sensiblement rectangulaires au centre desquelles sont réalisées des ouvertures 6. Ces ouvertures 6 débouchent directement dans la cavité formée par les quatre portions en forme de U 5 constituant le corps allongé 4.Moreover, the upper 2 and lower 3 ends of each support arm 1 are formed by substantially rectangular metal plates in the center of which are formed openings 6. These openings 6 open directly into the cavity formed by the four U-shaped portions 5 constituting the elongate body 4.

Chaque plaque présente au niveau de son contour extérieur une pluralité d'orifices, par exemple au nombre de 8, destinés à recevoir des organes de fixation pour fixer au moins un autre de bras de support 1 pour moduler ledit système d'échafaudage modulaire.Each plate has at its outer contour a plurality of orifices, for example 8 in number, intended to receive fasteners for fixing at least one other support arm 1 for modulating said modular scaffolding system.

Comme on peut le voir sur la figure 8, chaque bras de support 1 comprend une poutre métallique 30 qui s'étend entre les portions en forme de U 5 et entre les plaques supérieure 2 et inférieure du bras de support. De plus, des picots ou organes de renfort 31, au nombre de 4, peuvent relier la poutre allongée aux angles arrondis des portions en forme de U de manière à augmenter la résistance du bras de support , notamment par rapport aux efforts de flambage.As can be seen on the figure 8 each support arm 1 comprises a metal beam 30 which extends between the U-shaped portions 5 and between the upper and lower 2 plates of the support arm. In addition, pins or reinforcement members 31, 4 in number, can connect the elongated beam to the rounded corners of the U-shaped portions so as to increase the strength of the support arm, particularly with respect to buckling forces.

La disposition de la poutre allongée 30 dans le bras de support 1 est elle aussi particulière. En effet, comme on peut le voir sur la figure 8, la poutre allongée 30 présente une section sensiblement carrée dont les côtés sont disposés au regard des angles arrondis des branches latérales des portions en forme de U 5 et dont les coins sont disposés en regard des branches médianes des portions en forme de U.The arrangement of the elongated beam 30 in the support arm 1 is also particular. Indeed, as we can see on the figure 8 , the elongated beam 30 has a substantially square section whose sides are arranged with respect to the rounded corners of the side branches of the U-shaped portions 5 and whose corners are arranged opposite the middle branches of the U-shaped portions.

Par ailleurs comme on peut le voir sur les figures 3, 4 et 5, chaque bras de support 1 peut comprendre également des moyens de fixation 7 permettant la fixation d'organes de manutention ou d'autres organes comme on le verra ci-après.Moreover, as can be seen from Figures 3, 4 and 5 each support arm 1 may also comprise fastening means 7 for attaching handling members or other members as will be seen below.

Les bras de support 1 représentés sur les figures 1 à 5 et tels qu'ils sont formés par leur corps allongé qui présentent une section formée par quatre portions en forme de U sont susceptibles de supporter des charges axiales allant jusqu'à 2000kN.The support arms 1 shown on the Figures 1 to 5 and as they are formed by their elongated body which have a section formed by four U-shaped portions are capable of supporting axial loads up to 2000kN.

Les figures 7 et 8 représentent plus en détail les moyens de fixation 7 pouvant être directement rapportés sur le corps allongé 4 du bras de support 1 et la figure 8 montre à nouveau la section formée par quatre portions en forme de U 5 dont les deux branches latérales sont solidaires et sensiblement perpendiculaires aux branches latérales des portions en forme de U directement adjacentes. On voit également sur cette figure 8, les huit orifices de la plaque inférieure 3 qui permettent une fixation du bras de support 1 à un autre bras de support de manière à rendre modulaire l'échafaudage.The Figures 7 and 8 show in more detail the fastening means 7 which can be directly attached to the elongate body 4 of the support arm 1 and the figure 8 again shows the section formed by four U-shaped portions 5 whose two lateral branches are integral and substantially perpendicular to the lateral branches of the U-shaped portions directly adjacent. We also see on this figure 8 , the eight orifices of the lower plate 3 which allow attachment of the support arm 1 to another support arm so as to make the scaffold modular.

La figure 9 représente un module 41 qui comprend quant à lui quatre bras de support 1 de longueur égale et qui forment les coins d'un carré tout en étant fixés en eux par des plaques de maintien 8.The figure 9 represents a module 41 which comprises four support arms 1 of equal length and which form the corners of a square while being fixed in them by holding plates 8.

Plus exactement, ces plaques de maintien 8 comprennent chacune deux bras supérieur et inférieur 9 qui sont reliés à leurs extrémités aux moyens de fixations 7 des bras de support 1 de manière à maintenir et à fixer entre eux les bras de support 1 adjacents. Par ailleurs, ces plaques de maintien 8 comprennent également des panneaux verticaux 10 qui s'étendent entre les bras 9. Comme on peut le voir sur la figure 10, ces panneaux 10 peuvent être formés par des panneaux perforés et/ou incurvés qui permettent de rigidifier l'ensemble du module 41 ainsi assemblé.More precisely, these holding plates 8 each comprise two upper and lower arms 9 which are connected at their ends to the fastening means 7 of the support arms 1 so as to hold and fix between them the adjacent support arms 1. Moreover, these holding plates 8 also comprise vertical panels 10 which extend between the arms 9. As can be seen in FIG. figure 10 these panels 10 may be formed by perforated and / or curved panels which make it possible to stiffen the assembly of the module 41 thus assembled.

La figure 11 représente une vue en coupe transversale du module 41 tel que représenté sur la figure 9. Comme on peut le voir, chaque module 41 comprend quatre bras de support 1 qui forment les coins d'un carré et ces bras de support 1 sont reliés entre eux par les plaques de maintien 8 afin de rigidifier l'ensemble.The figure 11 represents a cross-sectional view of the module 41 as shown in FIG. figure 9 . As can be seen, each module 41 comprises four support arms 1 which form the corners of a square and these support arms 1 are connected between them by the holding plates 8 to stiffen the assembly.

La figure 12 montre une vue en détail de l'un des bras de support 1 formant le module 41, cette figure 12 représentant le bras de support 1 et son corps allongé 4 avec ses quatre portions en forme de U 5 qui sont reliées entre elles ou qui ne forment qu'une seule pièce et au-dessus desquelles sont fixées la plaque supérieure 2 qui est elle-même pourvue des huit orifices permettant une fixation d'un autre module supérieur.
La figure 13 montre un exemple de réalisation dans lequel des câbles de mise en tension 11 sont disposés dans l'ouverture 6 de la plaque supérieure ou inférieure du bras de support 1 et donc à l'intérieur du corps allongé 4, ces câbles de mise en tension 11 pouvant être tendus de manière à améliorer la mise sous contrainte du bras de support 1 lorsque ce dernier est soumis à des contraintes ou à des précontraintes élevées.The figure 12 shows a detailed view of one of the support arms 1 forming the module 41, this figure 12 representing the support arm 1 and its elongated body 4 with its four U-shaped portions 5 which are interconnected or which form only one piece and above which the upper plate 2 is fixed which is itself provided with eight holes for attachment of another upper module.
The figure 13 shows an exemplary embodiment in which tensioning cables 11 are arranged in the opening 6 of the upper or lower plate of the support arm 1 and thus inside the elongated body 4, these tensioning cables 11 which can be tensioned so as to improve the stressing of the support arm 1 when the latter is subjected to high stresses or prestressing.

Bien entendu, ces câbles de mise en tension 11 peuvent traverser plusieurs bras de support 1 lorsque ces derniers sont fixés les uns aux autres au moyen des plaques d'extrémité sensiblement rectangulaires et dans lesquelles sont réalisées les huit orifices servant à la fixation d'une pluralité d'autres modules 41. Selon un autre exemple de réalisation représenté sur la figure 14, le corps allongé 1 peut également être rempli par des matériaux de renfort tels que du béton, du matériau en mousse 12, du mortier ou autre afin d'améliorer la résistance des bras de support mis en tension ou pour assurer l'étanchéité des câbles 11.Of course, these tensioning cables 11 can pass through several support arms 1 when the latter are fixed to one another by means of the substantially rectangular end plates and in which the eight orifices for fixing a plurality of other modules 41. According to another exemplary embodiment shown on the figure 14 the elongate body 1 may also be filled with reinforcing materials such as concrete, foam material 12, mortar or the like in order to improve the strength of the tensioned support arms or to seal the cables 11.

La figure 15 représente une vue d'ensemble de deux pylônes 20 formés d'une pluralité de modules 41 qui supportent une structure de renfort horizontale et triangulée 15. Ce système d'échafaudage modulaire telle que représenté sur la figure 15 va être expliqué en détail ci-après.The figure 15 represents an overview of two pylons 20 formed of a plurality of modules 41 which support a horizontal and triangular reinforcing structure 15. This modular scaffolding system such as that represented on the figure 15 will be explained in detail below.

La figure 16 montre deux modules 41 qui constituent la partie d'extrémité supérieure de l'un de pylônes 20 représentés sur la figure 15 servant à supporter la structure de renfort horizontale 15.The figure 16 shows two modules 41 which constitute the upper end portion of one of the towers 20 shown on the figure 15 for supporting the horizontal reinforcing structure 15.

Comme on peut le voir sur cette figure 16, le module inférieur 41 présente une plaque supérieure 2 qui est directement rattachée et fixée à la plaque inférieure 3 du module 41 qui lui est supérieure de manière à former une partie de pylône modulaire 20.As we can see on this figure 16 , the lower module 41 has an upper plate 2 which is directly attached and fixed to the lower plate 3 of the module 41 which is above it so as to form a modular pylon portion 20.

Comme nous l'avons dit précédemment, ces modules 41 qui sont formés par quatre bras de support 1 peuvent être également complétés par des câbles de mise en tension qui dans ce cas seront directement disposés dans le corps allongé 4 de chaque bras de support 1.As we said above, these modules 41 which are formed by four support arms 1 can also be completed by tensioning cables which in this case will be directly arranged in the elongated body 4 of each support arm 1.

Comme on peut toujours le voir sur cette figure 16, les plaques supérieures 2 du module supérieur 41 servent à la fixation de deux éléments d'appui 13 en forme de I, ces deux éléments d'appui 13 en forme de I servant eux-mêmes à supporter un second élément d'appui 14 sensiblement rectangulaire et qui est disposé perpendiculairement aux deux éléments d'appui 13 en forme de I. Ces deux éléments d'appui en forme de I ou de forme rectangulaire 14 sont généralement fixés par des organes de fixation tels que des boulons ou vis de fixation sans utiliser de point de soudure afin d'améliorer la modularité de l'ensemble de l'ouvrage.As we can always see on this figure 16 , the upper plates 2 of the upper module 41 serve for fixing two I-shaped bearing elements 13, these two I-shaped bearing elements 13 themselves serving to support a second support member 14 substantially rectangular and which is arranged perpendicular to the two support elements 13 in the form of I. These two I-shaped support members or rectangular 14 are generally fixed by fasteners such as bolts or fixing screws without use welding point to improve the modularity of the entire structure.

La figure 17 représente une traverse triangulée 42 qui forme une partie de la structure de renfort horizontale 15 représentée sur la figure 15.The figure 17 represents a triangulated cross member 42 which forms part of the horizontal reinforcing structure 15 shown in FIG. figure 15 .

Cette traverse triangulée 42 est formée par une pluralité de bras de support supérieurs 1 identiques à ceux représentés sur les figures 1 à 5 qui sont reliés entre eux par une pluralité d'éléments jointifs 16 qui seront décrits plus en détail dans la suite de la description. Cette traverse triangulée 42 comprend également une pluralité de bras de support inférieurs 1 qui sont eux-mêmes reliées entre eux par des éléments jointifs 16 de même forme que les éléments jointifs supérieurs 16 représentés sur la figure 17. Par ailleurs, ces éléments jointifs supérieur et inférieur 16 sont reliés entre eux par des bras de support diagonaux 1 qui sont également formés par des bras de support 1 identiques à ceux représentés sur les figures 1 à 5.This triangulated cross member 42 is formed by a plurality of upper support arms 1 identical to those shown in FIGS. Figures 1 to 5 which are connected between them by a plurality of contiguous elements 16 which will be described in more detail in the following description. This triangulated crossbar 42 also comprises a plurality of lower support arms 1 which are themselves connected to each other by contiguous elements 16 of the same shape as the upper contiguous elements 16 shown in FIG. figure 17 . Moreover, these upper and lower contiguous elements 16 are interconnected by diagonal support arms 1 which are also formed by support arms 1 identical to those shown in the drawings. Figures 1 to 5 .

La figure 18 représente en détail un élément jointif 16 qui comprend à ses deux extrémités des plaques rectangulaires 16a présentant une ouverture au travers de laquelle peuvent notamment passer des câbles de mise en tension qui s'étendront eux-mêmes au travers des bras de support 1 ou plus exactement des corps allongés 4 des bras de support 1.The figure 18 shows in detail a joined element 16 which comprises at its two ends rectangular plates 16a having an opening through which can in particular pass tensioning cables which will themselves extend through the support arms 1 or more exactly elongate bodies 4 of support arms 1.

Chaque plaque rectangulaire 16a d'un élément jointif 16 présente également huit orifices pour permettre leur fixation à la plaque rectangulaire des bras de support 1.Each rectangular plate 16a of a joined element 16 also has eight orifices to allow their attachment to the rectangular plate of the support arms 1.

Comme on peut le voir sur les figures 20 et 21, chaque élément jointif 16 présente quatre plaques de base 17 qui sont traversées par deux axes permettant la fixation de deux organes de rotation 18 qui présentent également deux plaques perforées de huit orifices de manière à venir se fixer sur les bras de support diagonaux 1 qui vont former en partie la traverse triangulée.As can be seen on the Figures 20 and 21 , each joined element 16 has four base plates 17 which are traversed by two axes for fixing two rotating members 18 which also have two perforated plates of eight orifices so as to be fixed on the diagonal support arms 1 which go partially form the triangulated cross.

Comme représentée sur la figure 15, la structure de renfort horizontale 15 comprend deux traverses triangulées 42 qui reposent directement sur les pylônes 20 formés par les éléments modulaires 41, et comme on peut le voir sur la figure 19, les deux traverses triangulées 42 sont reliées les unes aux autres au moyen d'éléments de liaison en forme de I 20 qui relient de manière fixe les éléments jointifs supérieurs 16 de chaque traverse triangulée 42.As represented on the figure 15 , the horizontal reinforcing structure 15 comprises two triangulated sleepers 42 which rest directly on the pylons Formed by the modular elements 41, and as can be seen from figure 19 , the two triangulated crosspieces 42 are connected to each other by means of I-shaped connecting elements 20 which fixedly connect the upper contiguous elements 16 of each triangulated cross-member 42.

La figure 23 représente quant à elle une figure détaillée de l'élément jointif 16 lorsque ce dernier est raccordé à deux bras de support inférieurs 1 ainsi qu'à deux bras de support diagonaux 1.The figure 23 represents a detailed figure of the joined element 16 when the latter is connected to two lower support arms 1 and two diagonal support arms 1.

La figure 24 représente quant à elle l'extrémité de l'un des pylônes 20 avec son module supérieur 41 qui supporte les deux éléments d'appui 13 en I ainsi que l'élément d'appui perpendiculaire 14 qui lui-même supporte l'extrémité de la structure de renfort horizontale.The figure 24 represents for its part the end of one of the towers 20 with its upper module 41 which supports the two support elements 13 in I and the perpendicular support element 14 which itself supports the end of the horizontal reinforcement structure.

La figure 25 représente un système d'échafaudage de l'art antérieur servant au remplacement d'un bras élévateur tandis que la figure 26 représente un système d'échafaudage modulaire conforme à l'invention qui sert également au remplacement d'un bras élévateur.The figure 25 represents a scaffolding system of the prior art for replacing an elevator arm while the figure 26 represents a modular scaffolding system according to the invention which also serves to replace a lift arm.

Le système d'échafaudage connu et représenté sur la figure 25, de par sa construction, comporte beaucoup plus d'éléments porteurs ayant une longueur relativement importante, ce qui complique l'élaboration de l'échafaudage tout en augmentant les coût de transport. Par ailleurs, les éléments constituants ce système d'échafaudage connu qui se présente sous la forme de pylônes comprenant des traverses triangulées ne sont pas adaptés pour supporter des charges lourdes.The scaffolding system known and represented on the figure 25 by its construction, has much more carrier elements having a relatively large length, which complicates the development of the scaffold while increasing the cost of transport. Moreover, the elements constituting this known scaffold system which is in the form of pylons comprising triangulated crosspieces are not suitable for supporting heavy loads.

A l'inverse, le système d'échafaudage conforme à l'invention et représenté sur la figure 26, de par ses pylônes 20 et sa structure de renfort 15 est capable de supporter des charges allant jusqu'à 16 000kN.Conversely, the scaffolding system according to the invention and represented on the figure 26 , because of its pylons 20 and its reinforcing structure 15 is able to withstand loads of up to 16 000kN.

La figure 27 représente un système d'échafaudage de l'art antérieur servant au levage et au déplacement d'un générateur tandis que la figure 28 représente un système d'échafaudage modulaire conforme à l'invention qui sert également au levage et au déplacement d'un même générateur.The figure 27 represents a scaffolding system of the prior art for lifting and moving a generator while the figure 28 represents a modular scaffolding system according to the invention which is also used for lifting and moving a same generator.

Le système d'échafaudage connu et représenté sur la figure 27, de par sa construction, et notamment de par l'existence des deux pylônes comprenant des traverses triangulées n'est pas adapté pour supporter des charges lourdes et par ailleurs la traverse présente également une longueur relativement importante ce qui complique également l'élaboration de l'échafaudage tout en augmentant le coût des transports.The scaffolding system known and represented on the figure 27 , by its construction, and in particular by the existence of two towers comprising triangulated crosspieces is not adapted to withstand heavy loads and also the crossbar also has a relatively large length which also complicates the development of the scaffolding while increasing the cost of transport.

A l'inverse, le système d'échafaudage conforme à l'invention et représenté sur la figure 28, de par sa constitution et notamment de ses pylônes 20 et de sa structure de renfort 15 est capable de supporter et de déplacer le générateur pouvant notamment avoir un poids de l'ordre de 6 500kN et ce tout en ayant des pylônes faciles à monter de par leur modularité de même que la structure de renfort horizontale qui peut être facilement montée ou démontée tout en étant constituée d'éléments de petite longueur.Conversely, the scaffolding system according to the invention and represented on the figure 28 , by its constitution and in particular its pylons 20 and its reinforcing structure 15 is able to support and move the generator may include a weight of the order of 6 500kN and while having easy to mount pylons of by their modularity as well as the horizontal reinforcement structure that can be easily mounted or disassembled while being made of small elements.

La figure 29 représente un autre mode de réalisation de la structure de renfort horizontale 15. En effet, comme on peut le voir sur cette figure, la structure de renfort horizontale 15 comporte ici six traverses triangulées 42 toutes identiques qui sont alignées de manière à former une unité qui pourra notamment être supportée par des pylônes 20 ou une pluralité de pylônes 20.The figure 29 represents another embodiment of the horizontal reinforcing structure 15. Indeed, as can be seen in this figure, the horizontal reinforcing structure 15 here comprises six triangular crosspieces 42 all identical which are aligned to form a unit which may in particular be supported by pylons 20 or a plurality of pylons 20.

Dans ce mode de réalisation, chaque traverse triangulée 42 présente le même nombre de bras de supports supérieurs, inférieurs et diagonaux ainsi que le même nombre d'éléments jointifs 16 de manière à former une unité préassemblée.In this embodiment, each triangulated cross member 42 has the same number of arms of upper, lower and diagonal supports and the same number of contiguous elements 16 so as to form a preassembled unit.

Cette structure de renfort horizontale 15 qui comporte six traverses triangulées 42 peut notamment être fixée en tant qu'unité en reliant les élément jointifs 16 les uns aux autres par des poutres ou des traverses qui viennent prendre en sandwich les éléments jointifs 16 inférieurs les uns contre les autres de manière à apporter une cohésion à cette structure de renfort horizontale 15.This horizontal reinforcing structure 15 which comprises six triangulated crosspieces 42 may in particular be fixed as a unit by connecting the contiguous elements 16 to each other by beams or crosspieces which sandwich the contiguous elements 16 against each other against each other. the others so as to bring cohesion to this horizontal reinforcing structure 15.

Claims (16)

  1. Support arm for a modular scaffolding system used in structural shoring,
    said support arm extending between a bottom end (3) and a top end (2) connected to one another by an elongate body (4) having a cross-section formed by four U-shaped portions (5), each having a median part connected by two outer corners to two lateral branches at the level of a junction,
    wherein each of the top (2) and bottom (3) ends of the support arm (1) has the shape of a substantially rectangular plate, said plate being in a position substantially perpendicular to the elongate body (4) of the support arm, and wherein each plate (2, 3) has a plurality of orifices at the level of its contour designed to receive fixing members for securing at least one other support arm (1) in order to modulate said scaffolding system,
    said support arm further comprising an elongate and rigid beam (30) which extends across the centre of the elongate body (4) between the top (2) and bottom (3) ends, characterised in that each lateral branch of a U-shaped portion (5) is joined to a lateral branch of the adjacent U-shaped portion (5), and in that the elongate beam (30) has a substantially square cross-section, the sides of which are disposed facing the four junctions between the lateral branches of the four U-shaped portions (5) and the corners of which are disposed facing the median parts of the U-shaped portions (5).
  2. Support arm as claimed in claim 1, wherein the lateral branches of two adjacent U-shaped portions (5) subtend substantially identical angles with one another.
  3. Support arm as claimed in any one of the preceding claims, wherein the two lateral branches of two adjacent U-shaped portions (5) are substantially perpendicular to one another.
  4. Support arm as claimed in any one of the preceding claims, wherein the junction between two lateral branches of two adjacent U-shaped portions (5) forms a substantially rounded angle.
  5. Support arm as claimed in claim 1, wherein each plate (2, 3) has an opening (6) at the centre of the elongate body (4) aligned with the elongate beam (30).
  6. Support arm as claimed in claim 1, wherein at least one reinforcing pin (31) connects the elongate beam (30) to one of the junctions between the lateral branches of two U-shaped portions (5).
  7. Support arm as claimed in any one of the preceding claims, wherein fixing means (7) are disposed along the elongate body (4) to enable handling members to be secured.
  8. Modular scaffolding system comprising at least one module (41) comprising four support arms (1) as claimed in any one of the preceding claims, the four support arms (1) having an equal length forming the corners of a square, being secured to one another by retaining plates (8).
  9. System as claimed in claim 8, wherein each retaining plate (8) is perforated and/or undulated.
  10. System as claimed in one or other of claims 8 and 9, wherein tensioning cables (11) are disposed in the interior of the modular elongate body (4), in particular for improving its resistance to loads under stress.
  11. System as claimed in claim 10, wherein the interior of the elongate body (14') where the tensioning cables (11') are disposed is filled with a reinforcing material (12).
  12. System as claimed in any one of claims 8 to 11, wherein at least two lattice towers (20) are formed, each by a plurality of modules (41), the two lattice towers (20) bearing a horizontal and triangulated reinforcing structure (15).
  13. System as claimed in claim 12, wherein each module (41) forming the end of a lattice tower (20) comprises support elements (13, 14) of a shape designed to support the horizontal reinforcing structure (15).
  14. System as claimed in one or other of claims 12 and 13, wherein the horizontal reinforcing structure (15) comprises at least one triangulated cross-member (42) formed by a plurality of top support arms (4) connected to one another by top connecting elements (16) and by a plurality of bottom support arms (4) connected to one another by bottom connecting elements (16), the top and bottom connecting elements (16) additionally being connected to one another by diagonally disposed support arms (1).
  15. System as claimed in claim 14, wherein the horizontal reinforcing structure (15) comprises a plurality of triangulated cross members (42) connected to one another in a fixed manner by connecting elements (20) at the level of the top connecting elements (16).
  16. System as claimed in one or the other of claims 14 and 15, wherein tensioning cables (11) are disposed in the interior of the bottom and/or top support arms of the triangulated cross member (42) in order to improve their resistance to loads under stress.
EP06290678.9A 2006-04-26 2006-04-26 Support arm for a modular scaffolding system as well as modular scaffolding with such an arm Active EP1849930B1 (en)

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CN103938889B (en) * 2014-04-10 2016-04-27 北京工业大学 The Huge Steel Open that a kind of floor compartment connects supports and the practice
FR3025539B1 (en) * 2014-09-05 2017-06-30 Jean Paul Charlec ALUMINUM PROVISIONAL MODULAR STRUCTURES

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