EP2674272A1 - Bench for manufacturing girders by extrusion - Google Patents
Bench for manufacturing girders by extrusion Download PDFInfo
- Publication number
- EP2674272A1 EP2674272A1 EP13170499.1A EP13170499A EP2674272A1 EP 2674272 A1 EP2674272 A1 EP 2674272A1 EP 13170499 A EP13170499 A EP 13170499A EP 2674272 A1 EP2674272 A1 EP 2674272A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- grid
- decking
- beams
- ski
- height
- 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.)
- Granted
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B1/00—Producing shaped prefabricated articles from the material
- B28B1/08—Producing shaped prefabricated articles from the material by vibrating or jolting
- B28B1/084—Producing shaped prefabricated articles from the material by vibrating or jolting the vibrating moulds or cores being moved horizontally for making strands of moulded articles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B1/00—Producing shaped prefabricated articles from the material
- B28B1/29—Producing shaped prefabricated articles from the material by profiling or strickling the material in open moulds or on moulding surfaces
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B3/00—Producing shaped articles from the material by using presses; Presses specially adapted therefor
- B28B3/12—Producing shaped articles from the material by using presses; Presses specially adapted therefor wherein one or more rollers exert pressure on the material
- B28B3/123—Producing shaped articles from the material by using presses; Presses specially adapted therefor wherein one or more rollers exert pressure on the material on material in moulds or on moulding surfaces moving continuously underneath or between the rollers, e.g. on an endless belt
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B7/00—Moulds; Cores; Mandrels
- B28B7/24—Unitary mould structures with a plurality of moulding spaces, e.g. moulds divided into multiple moulding spaces by integratable partitions, mould part structures providing a number of moulding spaces in mutual co-operation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28B23/00—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects
- B28B23/02—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects wherein the elements are reinforcing members
- B28B23/04—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects wherein the elements are reinforcing members the elements being stressed
- B28B23/06—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects wherein the elements are reinforcing members the elements being stressed for the production of elongated articles
Definitions
- the invention relates to a bench for manufacturing girders by spinning, of the type known from the patent document FR2421040 , that is to say comprising a rectangular decking of great length carrying a moving element moved at regular intervals along the decking to pour the concrete beams in successive series.
- the mobile equipment comprises a grid resting on the decking, this grid being formed of a series of longitudinal members parallel to the longitudinal direction of the deck, laterally spaced from each other and rigidly secured to each other.
- the concrete is poured onto the grid immobilized on the decking, to form a series of beams, that is to say a beam in each space separating two neighboring beams.
- the moving equipment is then moved longitudinally before casting another series of beams spaced from the previous along the decking.
- These beams incorporate prestressing wires or cables stretched longitudinally above the decking, and which extend between the longitudinal members of the grid.
- the front end of the grid is equipped with a concrete retaining comb and wire guide, comprising a series of teeth interposed between the longitudinal members.
- Each tooth has one or more passage holes for the prestressing wires, and the comb is displaceable longitudinally with respect to the grid.
- the grid further comprises at its rear end a movable flap between a low position of cutting and retaining the concrete and a high release position.
- a movable flap between a low position of cutting and retaining the concrete and a high release position.
- the guillotine-shaped rear shutter is then lowered to split the concrete of the series of beams that have just been poured and that of the series of previously cast beams, after which the whole of the grid with the lowered flap is advanced by one. short distance to separate the two sets of beams.
- the amount of concrete deposited is substantially greater than that required for the manufacture of the beams.
- the excess concrete is removed with a bucket scraping the upper face of the grid, before moving it along the decking for pouring concrete a new series of beams.
- an operator Prior to the movement of the grid for the casting of a new series of beams, an operator blocks in relation to the decking the comb which is movable in translation relative to the grid, and he raises the rear door.
- the grid can then be moved forward along the decking: the movable comb being immobilized relative to the decking, it holds in place the concrete of the beams, while the rest of the grid with its side members is moved forward .
- the object of the invention is to provide a solution for smoothing the concrete located in the upper part of the grid so as to form beams having smooth upper surfaces and homogeneous composition.
- the ski floats an overpais-seur concrete corresponding substantially to the difference between the height of the upper face of the grid and the height of the beams to produce, which allows a finish to maintain the homogeneity of the composition of the concrete in the upper part of the beams.
- each transverse ski is inclined so that one edge before, relative to the direction of travel of the grid along the decking, is higher than its rear edge.
- the idea underlying the invention is to provide in the rear part of the grid a finishing element of type trowel mounted at a level which is under the upper face of the grid body while being at the height of the upper faces of the beams to be manufactured.
- the height of the concrete before it is floated is greater than the height of the upper faces of the beams: there is therefore a reserve of concrete distributed along the beam, which serves to fill the hollows during the passage of the floats, which allows to smooth the concrete in such a way that it remains homogeneous at the level of the upper face of the beams.
- the grid of the installation according to the invention which is represented in figure 1 1, comprises a set of side members 2, spaced laterally from each other, which are rigidly secured to each other by means not shown, to form a grid body 3.
- the longitudinal members 2 are metal sections of rectangular section, T, I, or other, and they are secured to each other for example by welding to sleepers not shown.
- the grid 1 is part of an unrepresented moving assembly, which is carried by a not shown deck, rectangular in shape and having a length much greater than the length of the grid 1.
- the decking and the moving equipment are provided with means guide means by which the moving element moves rectilinearly along the decking, parallel to the longitudinal members.
- These guide means comprise for example two parallel side rails along the edges of the deck, the movable assembly being provided with corresponding wheels by which it rolls on these rails.
- the mobile equipment typically carries means for casting concrete on the grid 1 and means for vibrating the concrete once poured, so that it fills correctly by thixotropic effect each space between two longitudinal members.
- the installation also comprises, at each end of the decking, means for setting the prestressing wires 4 in position and for mechanically tensioning these wires which extend above the plane and metallic upper face of the decking between the wires. rails of this grid, to be coated by the constituent concrete of the beams.
- the grid body 3 is further equipped with a concrete retaining comb 6 which is movable in translation relative to the grid body 3, in the longitudinal direction, that is to say in the direction of the longitudinal members.
- the beams 2 which are substantially identical jointly define a base face 7 through which the gate body 3 is supported on the decking, and a top face 8 of the gate body.
- the nominal height of these longitudinal members, which is denoted h1 is greater than the height of the beams to be produced, so that the upper face 8 of the grid body 3 is located above the upper faces of the beams to be produced.
- each spar 2 has a recess which locally lowers its upper face under the level of the upper face 8.
- each spar 2 has its face. upper upper locally lowermost relative to the upper face 8, so that each of these longitudinal members has at its rear end a section of dimensions are smaller than those of its nominal section.
- this recess 9 comprises a first portion 11 connected to the upper face 8 and situated at a height h2 with respect to the lower face of the spar 2, this first portion being itself connected to a second portion 12 located at a height h3 relative to the lower face 7 and extending to the termination of the spar 2.
- the height h3 of the second portion 12 corresponds to the height of the beams to be produced, while the height h2 of the first portion 11 of the recess 9 has a value between the height of the upper face 8 and that of the beams to produce.
- the gate body 3 carries at its rear portion a ski 13 which extends transversely with respect to the direction of advance 14 of this gate, having its lower face resting on the upper face of the second portion 12 of the recess.
- This ski is slightly inclined relative to the horizontal, so that its front edge is higher than its rear edge.
- the mobile equipment is provided with additional means to animate the ski 13 of lateral translational movements so that it floats the concrete of the upper face of the beams during production, these movements having an amplitude which is of the order of width of beams to produce.
- the installation further comprises a swinging cylinder 14 which extends parallel to the ski 13 while bearing on the upper face of the first portion 11 of the recess 9.
- This swinging cylinder 14, which is fixed relative to the gate body, performs a first compaction of the concrete beams during the advance of the grid along the decking.
- the concrete is first poured on the grid 1 immobilized on the decking, between the laterally separating the longitudinal members, after which vibrating needles can be moved along these spaces to compact the concrete by thixotropic effect.
- a not shown cup, part of the mobile assembly associated with the grid, is then moved along the upper face 8 of this grid to remove any excess concrete protruding from this upper face.
- the crew is moved along the decking to pour concrete from another series of beams to manufacture. It is during this displacement that the finishing operations of the upper faces of the beams are carried out.
- the crew actuates the ski 13 so that it is animated by a rectilinear reciprocating transverse movement while being held in abutment on the upper faces of the second portions 12 of the longitudinal members 2, so as to float the concrete of the upper faces of the beams.
- a bead is formed forward or upstream of the swinging roller 14, to compact the concrete.
- the upper face of the concrete, at the cylinder, at the height h2 which is substantially greater than the height h3 at which is the lower face of the ski 13.
- the ski 13 which is driven by an alternating transversal movement, causes the concrete to float on the upper faces of the beams, which makes it possible to fill any cavities that this upper face has, and to smooth these upper faces so that they have a smooth appearance.
- This ski having its front edge higher than its rear edge, it is mainly this rear edge that works when the ski is activated.
- the invention makes it possible to initially cast concrete at a height greater than the final height of the beams to be manufactured, which makes it possible to achieve an optimal finish of these upper faces, in particular avoiding the presence of hollow regions at the level of these upper faces, thanks to the excess of concrete.
- a single ski is used, but the equipment advantageously comprises a second ski to further improve the quality of the finish of the upper faces and the homogeneity of the concrete.
- These two skis are then animated with transverse movements in opposition of phase, and each ski is inclined so that its front edge is higher than its rear edge with respect to the direction of advancement of the grid along the decking.
- the two skis may, depending on the case, be located at the same height, namely the final height of the beams to be manufactured, or at two different heights.
- the threshing cylinder marked 14 in the figures is replaced by the second ski which then constitutes the upstream ski system progressing along the decking.
- the race of the skis is of the order of the width of the beams to produce. This allows, in the case where the system comprises two skis, to equip the upstream ski threshing plates, that is to say, vertical plates oriented longitudinally rigidly secured to the front edge of the ski.
- Each threshing plate thus extends upstream of the wearer, and it falls below the level of the lower face of this ski, which allows it to brew laterally. to better distribute it, the concrete located in the upper part of the corresponding beam. As understood, then provides a threshing plate at each interval separating two adjacent side members.
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Mechanical Engineering (AREA)
- On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
- Floor Finish (AREA)
- Road Paving Structures (AREA)
Abstract
Description
L'invention concerne un banc de fabrication de poutrelles par filage, du type connu du document de brevet
Dans une telle installation, l'équipage mobile comporte une grille reposant sur le platelage, cette grille étant formée d'une série de longerons parallèles à la direction longitudinale du platelage, espacés latéralement les uns des autres et rigidement solidarisés les uns aux autres.In such an installation, the mobile equipment comprises a grid resting on the decking, this grid being formed of a series of longitudinal members parallel to the longitudinal direction of the deck, laterally spaced from each other and rigidly secured to each other.
En fonctionnement, le béton est coulé sur la grille immobilisée sur le platelage, pour former une série de poutrelles, c'est-à-dire une poutrelle dans chaque espace séparant deux longerons voisins. L'équipage mobile est ensuite déplacé longitudinalement avant de procéder au coulage d'une autre série de poutrelles espacée de la précédente le long du platelage.In operation, the concrete is poured onto the grid immobilized on the decking, to form a series of beams, that is to say a beam in each space separating two neighboring beams. The moving equipment is then moved longitudinally before casting another series of beams spaced from the previous along the decking.
Ces poutrelles intègrent des fils ou câbles de précontrainte tendus longitudinalement au dessus du platelage, et qui s'étendent entre les longerons de la grille. A cet effet, l'extrémité avant de la grille est équipée d'un peigne de retenue du béton et de guidage des fils, comportant une série de dents intercalées entre les longerons. Chaque dent comporte un ou des trous de passage des fils de précontrainte, et le peigne est déplaçable longitudinalement par rapport à la grille.These beams incorporate prestressing wires or cables stretched longitudinally above the decking, and which extend between the longitudinal members of the grid. For this purpose, the front end of the grid is equipped with a concrete retaining comb and wire guide, comprising a series of teeth interposed between the longitudinal members. Each tooth has one or more passage holes for the prestressing wires, and the comb is displaceable longitudinally with respect to the grid.
La grille comporte encore à son extrémité arrière un volet mobile entre une position basse de découpe et de retenue du béton et une position haute de libération. Lorsque le volet est en position basse les dents qu'il comporte à son bord inférieur sont insérées entre les fils et les longerons pour couper et/ou retenir le béton, et lorsque ce volet est relevé, l'espace situé entre les fils et les longerons est laissé libre.The grid further comprises at its rear end a movable flap between a low position of cutting and retaining the concrete and a high release position. When the flap is in the low position the teeth that it has at its lower edge are inserted between the son and the rails to cut and / or retain the concrete, and when this flap is raised, the space between the son and the side members is left free.
Lorsque la grille est en place sur le platelage, avec son peigne mobile à son extrémité avant, le béton est coulé dans les espaces séparant les longerons, en continuité des poutrelles de la série précédemment coulée.When the grid is in place on the decking, with its mobile comb at its front end, the concrete is poured into the spaces separating the longitudinal members, in continuity with the beams of the previously cast series.
Le volet arrière qui forme guillotine est alors abaissé pour scinder le béton de la série de poutrelles venant d'être coulé et celui de la série de poutrelles précédemment coulée, après quoi l'ensemble de la grille avec le volet abaissé est avancé d'une faible distance pour séparer les deux séries de poutrelles.The guillotine-shaped rear shutter is then lowered to split the concrete of the series of beams that have just been poured and that of the series of previously cast beams, after which the whole of the grid with the lowered flap is advanced by one. short distance to separate the two sets of beams.
La quantité de béton déposée est sensiblement supérieure à celle nécessaire à la fabrication des poutrelles. L'excédent de béton est retiré avec un godet venant racler la face supérieure de la grille, avant déplacement de celle-ci le long du platelage en vue du coulage du béton d'une nouvelle série de poutrelles.The amount of concrete deposited is substantially greater than that required for the manufacture of the beams. The excess concrete is removed with a bucket scraping the upper face of the grid, before moving it along the decking for pouring concrete a new series of beams.
Préalablement au déplacement de la grille en vue du coulage d'une nouvelle série de poutrelles, un opérateur bloque par rapport au platelage le peigne qui est mobile en translation par rapport à la grille, et il relève le volet arrière. La grille peut alors être déplacée vers l'avant le long du platelage : le peigne mobile étant immobilisé par rapport au platelage, il retient en place le béton des poutrelles, pendant que le reste de la grille avec ses longerons est déplacé vers l'avant.Prior to the movement of the grid for the casting of a new series of beams, an operator blocks in relation to the decking the comb which is movable in translation relative to the grid, and he raises the rear door. The grid can then be moved forward along the decking: the movable comb being immobilized relative to the decking, it holds in place the concrete of the beams, while the rest of the grid with its side members is moved forward .
Le but de l'invention est de proposer une solution pour lisser correctement le béton situé en partie supérieure de la grille de manière à former des poutrelles ayant des faces supérieures lisses et de composition homogène.The object of the invention is to provide a solution for smoothing the concrete located in the upper part of the grid so as to form beams having smooth upper surfaces and homogeneous composition.
A cet effet, l'invention a pour objet une installation de fabrication de poutrelles par filage comportant :
- un platelage métallique rectangulaire fixe s'étendant horizontalement en étant orienté selon une direction longitudinale ;
- un équipage mobile porté par le platelage et comprenant une grille incluant une série de longerons espacés les uns des autres latéralement, les faces supérieures des longerons délimitant conjointement une face haute de la grille qui est au dessus des faces supérieures des poutrelles à produire ;
- des moyens pour retirer un excédent de béton à la face haute de la grille ;
- des moyens de guidage de l'équipage mobile le long du platelage ;
pour fabriquer des séries de poutrelles en coulant pour chaque série du béton entre les longerons de la grille immobilisée avant de retirer l'excédent de béton à la face haute de la grille, et de déplacer cette grille le long du platelage pour couler une nouvelle série de poutrelles, et dans laquelle ; - chaque extrémité arrière de longeron de la grille présente un décrochement qui est surbaissé pour être au moins en partie à la hauteur des faces supérieures des poutrelles à produire ;
- la machine comporte un ski orienté transversalement et en appui sur une portion des décochements des longerons ayant une hauteur correspondant à la hauteur des poutrelles à produire, ainsi que des moyens pour animer ce ski d'un mouvement alternatif transversal lors de l'avance de la grille le long du platelage.
- a fixed rectangular metal deck extending horizontally oriented in a longitudinal direction;
- a mobile equipment carried by the deck and comprising a grid including a series of side members spaced from each other laterally, the upper faces of the side members jointly defining an upper face of the grid which is above the upper faces of the beams to be produced;
- means for removing excess concrete at the top face of the grid;
- means for guiding the moving equipment along the decking;
to manufacture series of beams by pouring for each series of concrete between the longitudinal members of the immobilized grid before removing the excess concrete at the high face of the grid, and to move this grid along the decking to pour a new series of beams, and in which; - each rear end of the spar of the grid has a recess which is lowered to be at least partly at the height of the upper faces of the beams to be produced;
- the machine comprises a ski oriented transversely and resting on a portion of the jolts of the spars having a height corresponding to the height of the joists to be produced, and means for animating this ski with a transverse reciprocating movement during the advance of the grate along the decking.
Avec cette solution, le ski taloche une surépais-seur de béton correspondant sensiblement à la différence entre la hauteur de la face haute de la grille et la hauteur des poutrelles à produire, ce qui permet de réaliser une finition conservant l'homogénéité de la composition du béton en partie supérieure des poutrelles.With this solution, the ski floats an overpais-seur concrete corresponding substantially to the difference between the height of the upper face of the grid and the height of the beams to produce, which allows a finish to maintain the homogeneity of the composition of the concrete in the upper part of the beams.
Installation telle que définie ci-dessus, comportant encore un cylindre battant orienté transversalement en étant en appui sur une portion des décrochements ayant une hauteur comprise entre la hauteur de la face haute de la grille et la hauteur des poutrelles à produire, ce cylindre battant étant agencé en amont du ski par rapport à la direction d'avancement de la grille le long du platelage.Installation as defined above, further comprising a swing cylinder oriented transversely bearing on a portion of the recesses having a height between the height of the upper face of the gate and the height of the beams to produce, the cylinder being arranged upstream of the ski relative to the direction of advancement of the grid along the decking.
Installation telle que définie ci-dessus, comportant en outre un second ski orienté transversalement en étant en appui sur les décrochements des longerons, ainsi que des moyens pour animer ce second ski d'un mouvement alternatif transversal en opposition de phase avec l'autre ski, durant l'avance de la grille le long du platelage.Installation as defined above, further comprising a second ski oriented transversely bearing on the recesses of the side members, and means for animating the second ski of a transverse reciprocating movement in phase opposition with the other ski , during the advance of the grid along the decking.
Installation telle que définie ci-dessus, dans laquelle chaque ski transversal est incliné pour que on arête avant, par rapport au sens d'avancement de la grille le long du platelage, soit plus haute que son arête arrière.Installation as defined above, wherein each transverse ski is inclined so that one edge before, relative to the direction of travel of the grid along the decking, is higher than its rear edge.
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La
figure 1 est une vue de dessus montrant la grille selon l'invention en cours de déplacement le long du platelage qui la supporte ;Thefigure 1 is a top view showing the grid according to the invention being moved along the decking that supports it; -
La
figure 2 est une vue latérale de la grille selon l'invention ;Thefigure 2 is a side view of the grid according to the invention; -
La
figure 3 est une vue latérale de la portion arrière de la grille selon l'invention.Thefigure 3 is a side view of the rear portion of the grid according to the invention.
L'idée à la base de l'invention est de prévoir en partie arrière de la grille un élément de finition de type taloche monté à un niveau qui est sous la face haute du corps de grille tout en étant à la hauteur des faces supérieures des poutrelles à fabriquer.The idea underlying the invention is to provide in the rear part of the grid a finishing element of type trowel mounted at a level which is under the upper face of the grid body while being at the height of the upper faces of the beams to be manufactured.
La hauteur du béton avant qu'il ne soit taloché est supérieure à la hauteur des faces supérieures des poutrelles : on a donc une réserve de béton répartie le long de la poutrelle, qui sert à combler les creux lors du passage des taloches, ce qui permet de lisser le béton de telle manière qu'il reste homogène au niveau de la face supérieure des poutrelles.The height of the concrete before it is floated is greater than the height of the upper faces of the beams: there is therefore a reserve of concrete distributed along the beam, which serves to fill the hollows during the passage of the floats, which allows to smooth the concrete in such a way that it remains homogeneous at the level of the upper face of the beams.
La grille de l'installation selon l'invention, qui est représentée en
Les longerons 2 sont des profilés métalliques à section rectangulaire, en T, en I, ou autre, et ils sont solidarisés les uns aux autres par exemple par soudage à des traverses non représentées.The
La grille 1 fait partie d'un équipage mobile non représenté, qui est porté par un platelage non représenté, de forme rectangulaire et ayant une longueur très supérieure à la longueur de la grille 1. Le platelage et l'équipage mobile sont pourvus de moyens de guidage grâce auxquels l'équipage mobile se déplace de manière rectiligne le long du platelage, parallèlement aux longerons.The
Ces moyens de guidage comportent par exemple deux rails latéraux parallèles longeant les bords du platelage, l'équipage mobile étant quant à lui pourvu de roues correspondantes grâce auxquelles il roule sur ces rails.These guide means comprise for example two parallel side rails along the edges of the deck, the movable assembly being provided with corresponding wheels by which it rolls on these rails.
L'équipage mobile porte typiquement des moyens pour couler du béton sur la grille 1 ainsi que des moyens pour vibrer ce béton une fois coulé, afin qu'il comble correctement par effet thixotropique chaque espace entre deux longerons.The mobile equipment typically carries means for casting concrete on the
L'installation comporte encore, à chaque extrémité du platelage, des moyens de mise en position de fils de précontrainte 4, et de mise sous tension mécanique de ces fils qui s'étendent au dessus de la face supérieure plane et métallique du platelage entre les longerons de cette grille, pour être enrobés par le béton constitutif des poutrelles.The installation also comprises, at each end of the decking, means for setting the
Le corps de grille 3 est encore équipé d'un peigne de retenue du béton 6 qui est mobile en translation par rapport au corps de grille 3, selon la direction longitudinale, c'est-à-dire selon la direction des longerons.The
Les longerons 2 qui sont sensiblement identiques délimitent conjointement une face de base 7 par laquelle le corps de grille 3 est en appui sur le platelage, et une face haute 8 du corps de grille. La hauteur nominale de ces longerons, qui est notée h1 est supérieure à la hauteur des poutrelles à produire, de sorte que la face haute 8 du corps de grille 3 est située au dessus des faces supérieures des poutrelles à produire.The
Au niveau de l'extrémité arrière du corps de grille 3, chaque longeron 2 comporte un décrochement qui rabaisse localement sa face supérieure sous le niveau de la face haute 8. Autrement dit, en partie arrière de la grille, chaque longeron 2 a sa face supérieure localement surbaissée par rapport à la face haute 8, de sorte que chacun de ces longerons présente à son extrémité arrière une section de dimensions sont inférieures à celles de sa section nominale.At the rear end of the
Dans l'exemple des figures, ce décrochement 9 comporte une première portion 11 raccordée à la face haute 8 et située à une hauteur h2 par rapport à la face inférieure du longeron 2, cette première portion étant elle-même raccordée à une seconde portion 12 située à une hauteur h3 par rapport à la face inférieure 7 et s'étendant jusqu'à la terminaison du longeron 2.In the example of the figures, this
La hauteur h3 de la seconde portion 12 correspond à la hauteur des poutrelles à produire, alors que la hauteur h2 de la première portion 11 du décrochement 9 a une valeur comprise entre la hauteur de la face haute 8 et celle des poutrelles à produire.The height h3 of the
Le corps de grille 3 porte au niveau de sa portion arrière un ski 13 qui s'étend transversalement par rapport à la direction d'avancement 14 de cette grille, en ayant sa face inférieure en appui sur la face supérieure de la seconde portion 12 du décrochement. Ce ski est légèrement incliné par rapport à l'horizontale, de sorte que son arête avant est plus haute que son arête arrière.The
L'équipage mobile est pourvu de moyens additionnels pour animer le ski 13 de mouvements de translation latéraux afin qu'il taloche le béton de la face supérieure des poutrelles en cours de production, ces mouvements ayant une amplitude qui est de l'ordre de la largeur des poutrelles à produire.The mobile equipment is provided with additional means to animate the
L'installation comporte encore un cylindre battant 14 qui s'étend parallèlement au ski 13 tout en étant en appui sur la face supérieure de la première portion 11 du décrochement 9. Ce cylindre battant 14, qui est fixe par rapport au corps de grille, réalise un premier compactage du béton des poutrelles durant l'avance de la grille le long du platelage.The installation further comprises a swinging
En fonctionnement, le béton est d'abord coulé sur la grille 1 immobilisée sur le platelage, entre les espace séparant latéralement les longerons, après quoi des aiguilles vibrantes peuvent être déplacées le long de ces espaces pour tasser le béton par effet thixotropique.In operation, the concrete is first poured on the
Un godet non représenté, faisant partie de l'équipage mobile associé à la grille, est ensuite déplacé le long de la face haute 8 de cette grille pour retirer un éventuel excédent de béton dépassant de cette face supérieure.A not shown cup, part of the mobile assembly associated with the grid, is then moved along the
Une fois que ces opérations ont été réalisées, l'équipage est déplacé le long du platelage en vue de couler le béton d'une autre série de poutrelles à fabriquer. C'est durant ce déplacement que sont réalisées les opérations de finition des faces supérieures des poutrelles.Once these operations have been completed, the crew is moved along the decking to pour concrete from another series of beams to manufacture. It is during this displacement that the finishing operations of the upper faces of the beams are carried out.
Concrètement, l'équipage actionne le ski 13 pour qu'il soit animé d'un mouvement rectiligne alternatif transversal tout en étant maintenu en appui sur les faces supérieures des secondes portions 12 des longerons 2, de manière à talocher le béton des faces supérieures des poutrelles.Specifically, the crew actuates the
Comme représenté schématiquement à la
Dans ces conditions, le ski 13 qui est animé d'un mouvement transversal alternatif réalise le talochage du béton des faces supérieures des poutres, ce qui permet de combler les éventuels creux que comporte cette face supérieure, et de lisser ces faces supérieures pour qu'elles aient un aspect lisse. Ce ski ayant son arête avant plus haute que son arête arrière, c'est principalement cette arête arrière qui travaille lorsque le ski est activé.Under these conditions, the
Une fois que l'ensemble de la longueur des poutrelles a été parcouru, c'est-à-dire une fois que la grille est située sur le platelage au delà de la série de poutrelles, celle-ci est à nouveau immobilisée sur le platelage en vue du coulage du béton d'une nouvelle série de poutrelles.Once the entire length of the beams has been traveled, that is, once the grid is located on the decking beyond the series of beams, it is again immobilized on the decking for pouring concrete a new series of beams.
Comme on le comprend, l'invention permet de couler dans un premier temps du béton à une hauteur supérieure à la hauteur finale des poutrelles à fabriquer, ce qui permet de réaliser une finition optimale de ces faces supérieures, en évitant en particulier la présence de régions creuses au niveau de ces faces supérieures, grâce à l'excès de béton.As understood, the invention makes it possible to initially cast concrete at a height greater than the final height of the beams to be manufactured, which makes it possible to achieve an optimal finish of these upper faces, in particular avoiding the presence of hollow regions at the level of these upper faces, thanks to the excess of concrete.
Dans l'exemple des figures, un unique ski est utilisé, mais l'équipement comporte avantageusement un deuxième ski pour améliorer encore la qualité de la finition des faces supérieures ainsi que l'homogénéité du béton. Ces deux skis sont alors animés de mouvements transversaux en opposition de phase, et chaque ski est incliné pour que son arête avant soit plus haute que son arête arrière par rapport au sens d'avancement de la grille le long du platelage.In the example of the figures, a single ski is used, but the equipment advantageously comprises a second ski to further improve the quality of the finish of the upper faces and the homogeneity of the concrete. These two skis are then animated with transverse movements in opposition of phase, and each ski is inclined so that its front edge is higher than its rear edge with respect to the direction of advancement of the grid along the decking.
Les deux skis peuvent, selon le cas être situés à une même hauteur, à savoir la hauteur finale des poutres à fabriquer, ou bien à deux hauteurs différentes. Dans ce dernier cas, le cylindre de battage repéré par 14 dans les figures, est remplacé par le second ski qui constitue alors le ski amont du système progressant le long du platelage.The two skis may, depending on the case, be located at the same height, namely the final height of the beams to be manufactured, or at two different heights. In the latter case, the threshing cylinder marked 14 in the figures, is replaced by the second ski which then constitutes the upstream ski system progressing along the decking.
Comme indiqué plus haut, la course des skis est de l'ordre de la largeur des poutrelles à produire. Ceci permet, dans le cas où le système comporte deux skis, d'équiper le ski amont de plats de battage, c'est-à-dire de plaquettes verticales orientées longitudinalement en étant rigidement solidarisées à l'arête avant du ski.As indicated above, the race of the skis is of the order of the width of the beams to produce. This allows, in the case where the system comprises two skis, to equip the upstream ski threshing plates, that is to say, vertical plates oriented longitudinally rigidly secured to the front edge of the ski.
Chaque plat de battage s'étend ainsi en amont du qui le porte, et il descend sous le niveau de la face inférieure de ce ski, ce qui lui permet de brasser latéralement pour mieux le répartir, le béton situé en partie supérieure de la poutrelle correspondante. Comme on le comprend, on prévoit alors un plat de battage au niveau de chaque intervalle séparant deux longerons voisins.Each threshing plate thus extends upstream of the wearer, and it falls below the level of the lower face of this ski, which allows it to brew laterally. to better distribute it, the concrete located in the upper part of the corresponding beam. As understood, then provides a threshing plate at each interval separating two adjacent side members.
Claims (4)
pour fabriquer des séries de poutrelles en coulant pour chaque série du béton entre les longerons (2) de la grille (1) immobilisée avant de retirer l'excédent de béton à la face haute (8) de la grille, et de déplacer cette grille (1) le long du platelage pour couler une nouvelle série de poutrelles, et dans laquelle ;
to manufacture series of beams by casting for each series of concrete between the longitudinal members (2) of the grid (1) immobilized before removing the excess concrete at the high face (8) of the grid, and to move this grid (1) along the decking to cast a new series of beams, and wherein;
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PL13170499T PL2674272T3 (en) | 2012-06-11 | 2013-06-04 | Bench for manufacturing girders by extrusion |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR1255414A FR2991620B1 (en) | 2012-06-11 | 2012-06-11 | WHEEL BEAM MANUFACTURING BENCH |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP2674272A1 true EP2674272A1 (en) | 2013-12-18 |
| EP2674272B1 EP2674272B1 (en) | 2015-07-29 |
Family
ID=47172754
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP13170499.1A Active EP2674272B1 (en) | 2012-06-11 | 2013-06-04 | Bench for manufacturing girders by extrusion |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP2674272B1 (en) |
| ES (1) | ES2550102T3 (en) |
| FR (1) | FR2991620B1 (en) |
| PL (1) | PL2674272T3 (en) |
| PT (1) | PT2674272E (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1284715A (en) * | 1968-05-15 | 1972-08-09 | H F Warner Ltd | Improvements relating to sliding-mould machines for making prestressed concrete articles |
| FR2421040A1 (en) | 1978-03-30 | 1979-10-26 | Saret | Steam-heated metal plate floor for precasting bed - is fixed at single alternative points to limit product cracks due to floor expansion |
| FR2515566A1 (en) * | 1981-11-04 | 1983-05-06 | Safama | DEVICE FOR FILLING CONTINUOUSLY SHIFTING MOLDS, AND INSTALLATION COMPRISING SUCH A DEVICE |
| DE3311691A1 (en) * | 1983-03-30 | 1984-10-04 | Maschinenfabrik Weiler Marco Gmbh & Co Kg, 6531 Weiler | Sliding finisher |
| EP0384817A1 (en) * | 1989-02-22 | 1990-08-29 | Societe Anonyme De Recherche Et D'etudes Techniques S.A.R.E.T | Plant for making prestressed concrete articles, in particular elongate construction elements |
-
2012
- 2012-06-11 FR FR1255414A patent/FR2991620B1/en active Active
-
2013
- 2013-06-04 PT PT131704991T patent/PT2674272E/en unknown
- 2013-06-04 PL PL13170499T patent/PL2674272T3/en unknown
- 2013-06-04 EP EP13170499.1A patent/EP2674272B1/en active Active
- 2013-06-04 ES ES13170499.1T patent/ES2550102T3/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1284715A (en) * | 1968-05-15 | 1972-08-09 | H F Warner Ltd | Improvements relating to sliding-mould machines for making prestressed concrete articles |
| FR2421040A1 (en) | 1978-03-30 | 1979-10-26 | Saret | Steam-heated metal plate floor for precasting bed - is fixed at single alternative points to limit product cracks due to floor expansion |
| FR2515566A1 (en) * | 1981-11-04 | 1983-05-06 | Safama | DEVICE FOR FILLING CONTINUOUSLY SHIFTING MOLDS, AND INSTALLATION COMPRISING SUCH A DEVICE |
| DE3311691A1 (en) * | 1983-03-30 | 1984-10-04 | Maschinenfabrik Weiler Marco Gmbh & Co Kg, 6531 Weiler | Sliding finisher |
| EP0384817A1 (en) * | 1989-02-22 | 1990-08-29 | Societe Anonyme De Recherche Et D'etudes Techniques S.A.R.E.T | Plant for making prestressed concrete articles, in particular elongate construction elements |
Also Published As
| Publication number | Publication date |
|---|---|
| ES2550102T3 (en) | 2015-11-04 |
| PL2674272T3 (en) | 2015-12-31 |
| EP2674272B1 (en) | 2015-07-29 |
| FR2991620A1 (en) | 2013-12-13 |
| PT2674272E (en) | 2015-11-02 |
| FR2991620B1 (en) | 2014-06-20 |
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