EP2080601A1 - Moulding bench for producing linear elements, in particular from concrete - Google Patents

Moulding bench for producing linear elements, in particular from concrete Download PDF

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Publication number
EP2080601A1
EP2080601A1 EP09360004A EP09360004A EP2080601A1 EP 2080601 A1 EP2080601 A1 EP 2080601A1 EP 09360004 A EP09360004 A EP 09360004A EP 09360004 A EP09360004 A EP 09360004A EP 2080601 A1 EP2080601 A1 EP 2080601A1
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EP
European Patent Office
Prior art keywords
molding
bench
modules
frame
bench according
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
Application number
EP09360004A
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German (de)
French (fr)
Other versions
EP2080601B1 (en
Inventor
René LEDUC
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Rector Lesage SAS
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Rector Lesage SAS
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Filing date
Publication date
Application filed by Rector Lesage SAS filed Critical Rector Lesage SAS
Priority to PL09360004T priority Critical patent/PL2080601T3/en
Publication of EP2080601A1 publication Critical patent/EP2080601A1/en
Application granted granted Critical
Publication of EP2080601B1 publication Critical patent/EP2080601B1/en
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Classifications

    • 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
    • B28B7/26—Assemblies of separate moulds, i.e. of moulds or moulding space units, each forming a complete mould or moulding space unit independently from each other
    • B28B7/266—Assemblies of separate moulds, i.e. of moulds or moulding space units, each forming a complete mould or moulding space unit independently from each other for making oblong objects, e.g. girders
    • 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
    • B28B7/0002—Auxiliary parts or elements of the mould
    • B28B7/0011—Mould seals
    • 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
    • B28B7/0002—Auxiliary parts or elements of the mould
    • B28B7/0014—Fastening means for mould parts, e.g. for attaching mould walls on mould tables; Mould clamps
    • 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
    • B28B7/241—Detachable assemblies of mould parts providing only in mutual co-operation a number of complete moulding spaces
    • B28B7/246—Detachable assemblies of mould parts providing only in mutual co-operation a number of complete moulding spaces for making oblong objects, e.g. girders
    • 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
    • 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
    • B28B7/02—Moulds with adjustable parts specially for modifying at will the dimensions or form of the moulded article

Definitions

  • the present invention relates to a molding bench for manufacturing linear elements including concrete, this molding bench having a frame adapted to receive a continuous mold having parallel impressions extending over a predefined length and arranged to be able to manufacture said linear elements by series of parallel elements and in the axial extension of each other, said continuous mold consisting of several molding modules assembled end-to-end.
  • the molding benches make it possible in particular to manufacture linear structural elements such as beams or beams, concrete or the like, armed or not, and prestressed or not.
  • the current molding benches have a length greater than 15 or 20 meters and consist of several modules juxtaposed to allow to stretch cables or steel prestressing bars over the entire length of the molding bench. These modules have for example a length of between 15 and 20 meters and the number of these juxtaposed modules is not limited.
  • each module is independent and must be individually fixed to the ground by sealing into specific foundations.
  • each module is separated from the next by an interval.
  • the fact that the molding bench is discontinuous poses a constraint in the organization of the production of beams of different lengths in particular to optimize the filling of the molding bench.
  • the pouring of the concrete is complicated because of the passage of the existing intervals between consecutive modules. These intervals receive concrete residues and are difficult to clean.
  • the present invention aims at overcoming these drawbacks by proposing a continuous, gap-free molding bench whose implementation of the bench is greatly simplified, making it possible to optimize the production of the beams of different lengths, while ensuring the qualities of alignment. and straightness necessary for a good operation of this type of installation.
  • the invention relates to a molding bench of the type indicated in the preamble, characterized in that the molding modules are assembled end-to-end by integrated engagement means associated with fastening means so as to ensure the alignment and straightness of said indentations along the entire length of said molding bench.
  • These integrated engagement means may comprise at the ends of the molding modules respectively a complementary male part and a female part, the female part consisting of the external surface of the side walls and the bottom of the indentations and the male part comprising centering parts. extending said side walls and the bottom of the footprints.
  • the fastening means may comprise at the ends of the molding modules complementary lateral flanges adapted to receive fixing members.
  • each molding module has sleepers arranged to stiffen the module, support the impressions and ensure their alignment and straightness over the length of the module.
  • junction zone between the consecutive molding modules may advantageously be covered with a cold weld bead.
  • the molding modules preferably have a width that allows them to fit into said frame.
  • the continuous mold is locked relative to the frame at a fixed point, for example located at one end of the molding bench, this fixed point comprising a protruding blocking piece provided on the frame or the corresponding molding module. and a housing provided on the molding module or the frame, said housing being adapted to receive said protruding blocking piece with a minimum clearance.
  • the molding bench is equipped with means for preloading cables extending along the said bench and comprising a fixed trimmers at one end of the bench and a movable trunking at the other end of the bench, the fixed point is preferably located on the side of the fixed head.
  • the frame may also consist of frame modules assembled end to end and arranged to ensure the alignment of the modules over the entire length of the molding bench.
  • the frame modules are assembled by fastening means comprising at the ends of the frame modules complementary lateral flanges adapted to receive fasteners, and the fixed head is fixed directly to the side flanges of said frame.
  • the molding bench 1 comprises a frame 2 supporting a continuous mold 3 in which fingerprints 4 are formed.
  • parallel for example T-shaped, for the manufacture of linear elements (not shown) used in particular for the construction of buildings, such as beams, beams, concrete or the like, armed or not, with prestressing cables or not.
  • This molding bench 1 has a length greater than 20 meters and for example a length of 60 to 100 meters allowing the simultaneous manufacture of several series of parallel linear elements and in the axial extension of each other.
  • the continuous mold 3 consists of several molding modules 30, comprising said indentations 4, which are fitted end-to-end and adapted to guarantee the continuity of the imprints 4 along the entire length of the molding bench 1 as well as their alignment and straightness .
  • These molding modules 30 may be identical or different, of the same length or not.
  • the assembly of these molding modules 30 is provided by integrated nesting means and associated with fixing means. Any other method of assembly by patches or the like may be suitable.
  • the integrated nesting means comprise at the ends of the molding modules 30 respectively a male portion 31 and a female portion 32 complementary, forming a male / female sheath system that ensures perfect alignment right fitting.
  • the female part 32 is constituted by the outer surface of the side walls 40 and the bottom 41 of said indentations 4 and the male part 31 comprises centering pieces 33, 34 extending said side walls 40 and the bottom 41 of said indentations.
  • these centering pieces are formed by plates 33 backed to the side walls 40 and a square section 34 backed to the bottom 41, these parts being fixed by a weld seam 35 or any other equivalent means.
  • These centering pieces 33, 34 may have any other suitable form.
  • the male / female sheath system can have a different design depending on the shape of the fingerprints 4, the main thing is to ensure perfect alignment right fitting.
  • the fastening means comprise at the ends of the molding modules 30 complementary lateral flanges 36 adapted to receive fixing members (not shown) such as bolts or the like, through orifices 37 provided for this purpose.
  • fixing members not shown
  • Any other equivalent attachment means is also conceivable provided that it is removable.
  • Each molding module 30 consists of a metal structure formed in particular of two longitudinal members 38b assembled to sleepers 38 distributed over the length of the module to ensure the parallelism of the longitudinal members 38b and the mechanical rigidity of the module 30.
  • the cross members 38a extend along the entire width of the module and are provided with cutouts corresponding to the fingerprints 4.
  • These sleepers 38a form templates to support the fingerprints 4 by ensuring their alignment and straightness over the entire length of the module 30.
  • These sleepers 38a can be perforated by orifices 39 for the passage of electrical resistances (not shown) for heating the mold and setting the concrete. Any other equivalent form of construction may also be suitable.
  • connection or joining zone 42 (cf. Fig. 8B ) can be covered with a cold weld bead (not shown) to smooth this junction area.
  • This cold welding technique is advantageous because it does not involve any deformation of the material that may impair the straightness of the imprints 4.
  • the chassis 2 of the molding bench 1 consists of several frame modules 20 assembled end to end to ensure the alignment of said modules 20 over the entire length of the bench.
  • These frame modules 20 may be identical or different, of the same length or not, of the same length as the molding modules 30 or not.
  • each frame module 20 comprises a metal structure formed in particular of two longitudinal members 23 assembled to sleepers 24 distributed along their length to ensure the parallelism of the longitudinal members and the mechanical rigidity of the frame 2. Any other equivalent form of construction may also be suitable.
  • These sleepers 24 carry dampers 25 in the form of silentblocs or the like, able to support the molding modules 30, in particular at the right of the longitudinal members 38b.
  • These dampers 25 have the function of separating the continuous mold 3 from the chassis 2 during the vibrating of the concrete after pouring.
  • the construction of the frame 2 delimits an interior volume adapted to receive the continuous mold 3 by interlocking, the internal width L between the longitudinal members 23 being substantially equal to the width of the molding modules 30 to block them transversely.
  • the frame 2 can rest on the ground on a concrete slab 5 for example, and can be fixed by fastening lugs (not shown) reported, resting on a border of the frame and screwed into the slab, or by any other means equivalent.
  • the continuous mold 3 is in turn locked relative to the frame 2 to prevent slippage at the release of the preload, as explained below, this blocking being located preferably at a fixed point.
  • this fixed point consists of a protruding blocking piece 26 provided on the frame 2 and a housing 27 provided on the corresponding molding module 30, the housing 27 being able to receive the piece. blocking 26 with a minimum clearance.
  • the reverse configuration that is to say the locking piece 26 on the molding module 30 and the housing 27 on the frame 2 is also possible.
  • This fixed point is preferably located at one end of the molding bench 1.
  • This type of molding bench 1 may be equipped with prestressing means (not shown) of cables which extend all along the molding bench 1 inside the cavities 4.
  • prestressing means comprise in known manner a fixed trimmer disposed at one end of the bench and a movable trimmer disposed at the other end of the bench, to which the prestressing cables are fixed.
  • the fixed point is preferably located on the side of the fixed header, more precisely in the first molding module 30, in order to constrain the molding modules 30 towards the fixed header when releasing the prestress, avoiding thus any risk of dislocation of the modules.
  • the fixed trimmer is preferably fixed directly to the frame 2 via the side flanges 21 left and right. This method of assembly allows the resumption of prestressing forces in the longitudinal members 23 of the frame 2 and to eliminate the ground fixing of the fixed head.
  • the molding bench 1 as described is conventionally designed in parts, profiles and metal sheets assembled in particular by welding or the like. Its modular and removable design allows it to be easily and quickly set up on an industrial site without the need for major works. Once assembled, it is operational and allows the manufacture of linear elements such as beams or beams or the like, by positioning combs at predetermined intervals in the continuous mold 3 to delimit the length of said elements, these lengths may be different from one series to another.
  • the series of linear elements can succeed one another inside the continuous mold 3, without loss of volume, optimizing the filling of the imprints 4 over the entire length of the bench, unlike the molds of the prior art.
  • the invention achieves all the goals.
  • the fact of having a molding bench 1 in one piece optimizes the distribution of linear elements to manufacture.
  • the fact of no longer having discontinuous and separated modules facilitates the pouring of concrete and eliminates the cleaning operations between the modules.
  • the choice of the fixing point of the continuous mold 3 with respect to the frame 2 makes it possible to distribute to a certain extent the expansions of the molding modules 30 on either side of the fixed point, while forcing the molding modules 30 to slide towards this fixed point, which avoids any risk of disengagement of the modules between them, without soliciting cold soldering whose role is to seal the junction area 42 between the molding modules 30 to join them.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Moulds, Cores, Or Mandrels (AREA)

Abstract

The bench (1) has a chassis (2) for receiving a continuous mold (3) comprising T-shaped parallel fingerprints (4) extending in a predetermined length arranged for fabricating a series of linear elements in parallel and in axial extension of each other. The continuous mold consists of molding modules (30) that are assembled end to end by interlocking units integrated and associated with a fixation unit in a manner to ensure alignment and straightness of the fingerprints along entire length of the bench.

Description

Domaine technique :Technical area :

La présente invention concerne un banc de moulage pour fabriquer des éléments linéaires notamment en béton, ce banc de moulage comportant un châssis apte à recevoir un moule continu comportant des empreintes parallèles s'étendant sur une longueur prédéfinie et agencées pour pouvoir fabriquer lesdits éléments linéaires par série d'éléments parallèles et dans le prolongement axial les uns des autres, ledit moule continu étant constitué de plusieurs modules de moulage assemblés bout à bout.The present invention relates to a molding bench for manufacturing linear elements including concrete, this molding bench having a frame adapted to receive a continuous mold having parallel impressions extending over a predefined length and arranged to be able to manufacture said linear elements by series of parallel elements and in the axial extension of each other, said continuous mold consisting of several molding modules assembled end-to-end.

Technique antérieure :Prior art:

Les bancs de moulage permettent notamment de fabriquer des éléments de construction linéaires tels que des poutres ou des poutrelles, en béton ou similaire, armé ou non, et précontraint ou non. Les bancs de moulage actuels ont une longueur supérieure à 15 ou 20 mètres et sont constitués de plusieurs modules juxtaposés pour permettre de tendre des câbles ou des barres de précontrainte en acier sur toute la longueur du banc de moulage. Ces modules ont par exemple une longueur comprise entre 15 et 20 mètres et le nombre de ces modules juxtaposés n'est pas limité. Dans la technique actuelle, chaque module est indépendant et doit être fixé individuellement au sol par scellement dans des fondations spécifiques. De plus, chaque module est séparé du suivant par un intervalle. Le fait que le banc de moulage est discontinu pose une contrainte dans l'organisation de la production des poutrelles de différentes longueurs notamment pour optimiser le remplissage du banc de moulage. De plus, la coulée du béton est compliquée du fait du passage des intervalles existants entre des modules consécutifs. Ces intervalles reçoivent des résidus de béton et sont difficiles à nettoyer.The molding benches make it possible in particular to manufacture linear structural elements such as beams or beams, concrete or the like, armed or not, and prestressed or not. The current molding benches have a length greater than 15 or 20 meters and consist of several modules juxtaposed to allow to stretch cables or steel prestressing bars over the entire length of the molding bench. These modules have for example a length of between 15 and 20 meters and the number of these juxtaposed modules is not limited. In the present art, each module is independent and must be individually fixed to the ground by sealing into specific foundations. In addition, each module is separated from the next by an interval. The fact that the molding bench is discontinuous poses a constraint in the organization of the production of beams of different lengths in particular to optimize the filling of the molding bench. In addition, the pouring of the concrete is complicated because of the passage of the existing intervals between consecutive modules. These intervals receive concrete residues and are difficult to clean.

Les publications US 4 149 306 , US 6 374 475 et GB 1 359 627 décrivent des bancs de moulage continus, formés de modules de moulage mis bout à bout en appui plan et maintenus soit par des câbles de précontrainte, soit par des tiges de liaison. Néanmoins, ces modes de fixation ne sont pas fiables ni rigides et ne permettent pas d'assurer l'alignement ni la rectitude des empreintes de moulage.The publications US 4,149,306 , US 6,374,475 and GB 1,359,627 describe continuous molding benches formed of molding modules placed end to end in plane support and held either by prestressing cables or by connecting rods. However, these methods of attachment are unreliable and rigid and do not allow to ensure the alignment and straightness of moldings.

Exposé de l'invention:Presentation of the invention

La présente invention vise à pallier ces inconvénients en proposant un banc de moulage continu, sans intervalle, dont la mise en oeuvre du banc est grandement simplifiée, permettant une optimisation de la production des poutrelles de longueurs différentes, tout en assurant les qualités d'alignement et de rectitude nécessaires à une bonne exploitation de ce type d'installation.The present invention aims at overcoming these drawbacks by proposing a continuous, gap-free molding bench whose implementation of the bench is greatly simplified, making it possible to optimize the production of the beams of different lengths, while ensuring the qualities of alignment. and straightness necessary for a good operation of this type of installation.

Dans ce but, l'invention concerne un banc de moulage du genre indiqué en préambule, caractérisé en ce que les modules de moulage sont assemblés bout à bout par des moyens d'emboîtement intégrés associés à des moyens de fixation de manière à assurer l'alignement et la rectitude desdites empreintes sur toute la longueur dudit banc de moulage.For this purpose, the invention relates to a molding bench of the type indicated in the preamble, characterized in that the molding modules are assembled end-to-end by integrated engagement means associated with fastening means so as to ensure the alignment and straightness of said indentations along the entire length of said molding bench.

Ces moyens d'emboîtement intégrés peuvent comporter aux extrémités des modules de moulage respectivement une partie mâle et une partie femelle complémentaires, la partie femelle étant constituée par la surface extérieure des parois latérales et du fond des empreintes et la partie mâle comportant des pièces de centrage prolongeant lesdites parois latérales et le fond des empreintes.These integrated engagement means may comprise at the ends of the molding modules respectively a complementary male part and a female part, the female part consisting of the external surface of the side walls and the bottom of the indentations and the male part comprising centering parts. extending said side walls and the bottom of the footprints.

Les moyens de fixation peuvent comporter aux extrémités des modules de moulage des brides latérales complémentaires aptes à recevoir des organes de fixation.The fastening means may comprise at the ends of the molding modules complementary lateral flanges adapted to receive fixing members.

Dans la forme de réalisation préférée, chaque module de moulage comporte des traverses agencées pour rigidifier le module, supporter les empreintes et assurer leur alignement et leur rectitude sur la longueur du module.In the preferred embodiment, each molding module has sleepers arranged to stiffen the module, support the impressions and ensure their alignment and straightness over the length of the module.

La zone de jonction entre les modules de moulage consécutifs peut être avantageusement recouverte d'un cordon de soudure à froid.The junction zone between the consecutive molding modules may advantageously be covered with a cold weld bead.

Les modules de moulage ont de préférence une largeur qui leur permet de s'emboîter dans ledit châssis.The molding modules preferably have a width that allows them to fit into said frame.

Dans la forme de réalisation préférée, le moule continu est bloqué par rapport au châssis en un point fixe par exemple localisé à une extrémité du banc de moulage, ce point fixe comportant une pièce de blocage protubérante prévue sur le châssis ou le module de moulage correspondant et un logement prévu sur le module de moulage ou le châssis, ledit logement étant apte à recevoir ladite pièce de blocage protubérante avec un jeu minimum.In the preferred embodiment, the continuous mold is locked relative to the frame at a fixed point, for example located at one end of the molding bench, this fixed point comprising a protruding blocking piece provided on the frame or the corresponding molding module. and a housing provided on the molding module or the frame, said housing being adapted to receive said protruding blocking piece with a minimum clearance.

Si le banc de moulage est équipé de moyens de mise en précontrainte de câbles s'étendant tout le long dudit banc et comportant un chevêtre fixe à une extrémité du banc et un chevêtre mobile à l'autre extrémité du banc, le point fixe est de préférence localisé du côté du chevêtre fixe.If the molding bench is equipped with means for preloading cables extending along the said bench and comprising a fixed trimmers at one end of the bench and a movable trunking at the other end of the bench, the fixed point is preferably located on the side of the fixed head.

Le châssis peut être également constitué de modules de châssis assemblés bout à bout et agencés pour assurer l'alignement des modules sur toute la longueur du banc de moulage.The frame may also consist of frame modules assembled end to end and arranged to ensure the alignment of the modules over the entire length of the molding bench.

Dans la forme de réalisation préférée, les modules de châssis sont assemblés par des moyens de fixation comportant aux extrémités des modules de châssis des brides latérales complémentaires aptes à recevoir des organes de fixation, et le chevêtre fixe est fixé directement aux brides latérales dudit châssis.In the preferred embodiment, the frame modules are assembled by fastening means comprising at the ends of the frame modules complementary lateral flanges adapted to receive fasteners, and the fixed head is fixed directly to the side flanges of said frame.

Description sommaire des dessins :Brief description of the drawings:

La présente invention et ses avantages apparaîtront mieux dans la description suivante d'un mode de réalisation donné à titre d'exemple non limitatif, en référence aux dessins annexés, dans lesquels :

  • la figure 1 est une vue de dessus d'un banc de moulage selon l'invention,
  • la figure 2 est une vue en bout du banc de moulage de la figure 1,
  • la figure 3 est une vue en coupe longitudinale selon l'axe III-III du banc de moulage de la figure 2,
  • la figure 4 est une vue agrandie du détail IV de la figure 3,
  • la figure 5 est une vue agrandie du détail V de la figure 3,
  • la figure 6 est une vue partielle en perspective de dessous d'un côté d'un module de moulage montrant la partie mâle d'emboîtement,
  • la figure 7 est une vue partielle en perspective de dessous de l'autre côté d'un module de moulage montrant la partie femelle d'emboîtement,
  • les figures 8A et 8B sont des vues partielles en coupe longitudinale de deux modules de moulage respectivement avant et après emboîtement des parties mâle et femelle,
  • la figure 9 est une vue en perspective du châssis du banc de moulage de la figure 1,
  • la figure 10 est une vue en bout du châssis de la figure 9, et
  • la figure 11 est une vue partielle en coupe longitudinale du châssis de la figure 9.
The present invention and its advantages will appear better in the following description of an embodiment given by way of non-limiting example, with reference to the appended drawings, in which:
  • the figure 1 is a top view of a molding bench according to the invention,
  • the figure 2 is an end view of the molding bench of the figure 1 ,
  • the figure 3 is a longitudinal sectional view along the axis III-III of the molding bench of the figure 2 ,
  • the figure 4 is an enlarged view of detail IV of the figure 3 ,
  • the figure 5 is an enlarged view of detail V of the figure 3 ,
  • the figure 6 is a partial perspective view from below of one side of a molding module showing the male interlocking portion,
  • the figure 7 is a partial perspective view from below of the other side of a molding module showing the female interlocking portion,
  • the Figures 8A and 8B are partial views in longitudinal section of two molding modules respectively before and after interlocking of the male and female parts,
  • the figure 9 is a perspective view of the chassis of the molding bench of the figure 1 ,
  • the figure 10 is an end view of the chassis of the figure 9 , and
  • the figure 11 is a partial view in longitudinal section of the chassis of the figure 9 .

Illustrations de l'invention et meilleure manière de la réaliser :Illustrations of the invention and best way to achieve it:

En référence aux figures 1 et 2, le banc de moulage 1 selon l'invention comporte un châssis 2 supportant un moule continu 3 dans lequel sont formées des empreintes 4 parallèles, par exemple en forme de T, pour la fabrication d'éléments linéaires (non représentés) utilisés notamment pour la construction de bâtiments, tels que des poutres, des poutrelles, en béton ou similaire, armé ou non, avec des câbles de précontrainte ou non. Ce banc de moulage 1 a une longueur supérieure à 20 mètres et par exemple une longueur de 60 à 100 mètres permettant la fabrication simultanée de plusieurs séries d'éléments linéaires parallèles et dans le prolongement axial les uns des autres.With reference to Figures 1 and 2 , the molding bench 1 according to the invention comprises a frame 2 supporting a continuous mold 3 in which fingerprints 4 are formed. parallel, for example T-shaped, for the manufacture of linear elements (not shown) used in particular for the construction of buildings, such as beams, beams, concrete or the like, armed or not, with prestressing cables or not. This molding bench 1 has a length greater than 20 meters and for example a length of 60 to 100 meters allowing the simultaneous manufacture of several series of parallel linear elements and in the axial extension of each other.

En référence plus particulièrement aux figures 6 à 8, le moule continu 3 est constitué de plusieurs modules de moulage 30, comportant lesdites empreintes 4, qui sont emboîtés bout à bout et adaptés pour garantir la continuité des empreintes 4 sur toute la longueur du banc de moulage 1 ainsi que leur alignement et leur rectitude. Ces modules de moulage 30 peuvent être identiques ou non, de même longueur ou non.With particular reference to Figures 6 to 8 , the continuous mold 3 consists of several molding modules 30, comprising said indentations 4, which are fitted end-to-end and adapted to guarantee the continuity of the imprints 4 along the entire length of the molding bench 1 as well as their alignment and straightness . These molding modules 30 may be identical or different, of the same length or not.

Dans l'exemple représenté, l'assemblage de ces modules de moulage 30 est assuré par des moyens d'emboîtement intégrés et associés à des moyens de fixation. Tout autre mode d'assemblage par des pièces rapportées ou similaire peut convenir.In the example shown, the assembly of these molding modules 30 is provided by integrated nesting means and associated with fixing means. Any other method of assembly by patches or the like may be suitable.

Dans cet exemple, les moyens d'emboîtement intégrés comportent aux extrémités des modules de moulage 30 respectivement une partie mâle 31 et une partie femelle 32 complémentaires, formant un système de fourreau mâle/femelle qui garantit un alignement parfait au droit du raccord. La partie femelle 32 est constituée par la surface extérieure des parois latérales 40 et du fond 41 desdites empreintes 4 et la partie mâle 31 comporte des pièces de centrage 33, 34 prolongeant lesdites parois latérales 40 et le fond 41 desdites empreintes 4. Dans l'exemple représenté, ces pièces de centrage sont formées par des plaques 33 adossées aux parois latérales 40 et par un profilé carré 34 adossé au fond 41, ces pièces étant fixées par un cordon de soudure 35 ou tout autre moyen équivalent. Ces pièces de centrage 33, 34 peuvent avoir toute autre forme adaptée. De même, le système de fourreau mâle/femelle peut avoir une conception différente en fonction de la forme des empreintes 4, l'essentiel étant d'assurer un alignement parfait au droit du raccord.In this example, the integrated nesting means comprise at the ends of the molding modules 30 respectively a male portion 31 and a female portion 32 complementary, forming a male / female sheath system that ensures perfect alignment right fitting. The female part 32 is constituted by the outer surface of the side walls 40 and the bottom 41 of said indentations 4 and the male part 31 comprises centering pieces 33, 34 extending said side walls 40 and the bottom 41 of said indentations. example shown, these centering pieces are formed by plates 33 backed to the side walls 40 and a square section 34 backed to the bottom 41, these parts being fixed by a weld seam 35 or any other equivalent means. These centering pieces 33, 34 may have any other suitable form. Similarly, the male / female sheath system can have a different design depending on the shape of the fingerprints 4, the main thing is to ensure perfect alignment right fitting.

Dans l'exemple représenté, les moyens de fixation comportent aux extrémités des modules de moulage 30 des brides latérales 36 complémentaires aptes à recevoir des organes de fixation (non représentés) tels que des boulons ou similaires, à travers des orifices 37 prévus à cet effet. Tout autre moyen de fixation équivalent est également envisageable pour autant qu'il soit démontable.In the example shown, the fastening means comprise at the ends of the molding modules 30 complementary lateral flanges 36 adapted to receive fixing members (not shown) such as bolts or the like, through orifices 37 provided for this purpose. . Any other equivalent attachment means is also conceivable provided that it is removable.

Chaque module de moulage 30 est constituée d'une structure métallique formée notamment de deux longerons 38b assemblés à des traverses 38 réparties sur la longueur du module pour garantir le parallélisme des longerons 38b et la rigidité mécanique du module 30. Les traverses 38a s'étendent sur toute la largeur du module et sont pourvues de découpes correspondantes aux empreintes 4. Ces traverses 38a forment des gabarits pour soutenir les empreintes 4 en garantissant leur alignement et leur rectitude sur toute la longueur du module 30. Ces traverses 38a peuvent être perforées par des orifices 39 pour le passage des résistances électriques (non représentées) assurant le chauffage du moule et la prise du béton. Toute autre forme de construction équivalente peut également convenir.Each molding module 30 consists of a metal structure formed in particular of two longitudinal members 38b assembled to sleepers 38 distributed over the length of the module to ensure the parallelism of the longitudinal members 38b and the mechanical rigidity of the module 30. The cross members 38a extend along the entire width of the module and are provided with cutouts corresponding to the fingerprints 4. These sleepers 38a form templates to support the fingerprints 4 by ensuring their alignment and straightness over the entire length of the module 30. These sleepers 38a can be perforated by orifices 39 for the passage of electrical resistances (not shown) for heating the mold and setting the concrete. Any other equivalent form of construction may also be suitable.

Après assemblage des modules de moulage 30, leur raccord ou zone de jonction 42 (cf. fig. 8B) peut être recouvert d'un cordon de soudure à froid (non représenté) pour lisser cette zone de jonction. Cette technique de soudure à froid est avantageuse car elle n'implique aucune déformation de la matière risquant de nuire à la rectitude des empreintes 4.After assembly of the molding modules 30, their connection or joining zone 42 (cf. Fig. 8B ) can be covered with a cold weld bead (not shown) to smooth this junction area. This cold welding technique is advantageous because it does not involve any deformation of the material that may impair the straightness of the imprints 4.

En référence plus particulièrement aux figures 9 à 11, le châssis 2 du banc de moulage 1 est constitué de plusieurs modules de châssis 20 assemblés bout à bout pour assurer l'alignement desdits modules 20 sur toute la longueur du banc de moulage 1. Ces modules de châssis 20 peuvent être identiques ou non, de même longueur ou non, de même longueur que les modules de moulage 30 ou non.With particular reference to Figures 9 to 11 , the chassis 2 of the molding bench 1 consists of several frame modules 20 assembled end to end to ensure the alignment of said modules 20 over the entire length of the bench. These frame modules 20 may be identical or different, of the same length or not, of the same length as the molding modules 30 or not.

Dans l'exemple représenté, l'assemblage des modules de châssis 20 est assuré par des moyens de fixation comportant aux extrémités des modules de châssis 20 des brides latérales 21 complémentaires aptes à recevoir des organes de fixation (non représentés) tels que des boulons ou similaires au travers d'orifices 22. Tout autre mode d'assemblage est possible. Chaque module de châssis 20 comporte une structure métallique formée notamment de deux longerons 23 assemblés à des traverses 24 réparties sur leur longueur pour garantir le parallélisme des longerons et la rigidité mécanique du châssis 2. Toute autre forme de construction équivalente peut également convenir. Ces traverses 24 portent des amortisseurs 25 sous la forme de silentblocs ou similaire, aptes à supporter les modules de moulage 30, notamment au droit des longerons 38b. Ces amortisseurs 25 ont pour fonction de désolidariser le moule continu 3 du châssis 2 lors de la mise en vibration du béton après coulage.In the example shown, the assembly of the frame modules 20 is provided by fastening means comprising, at the ends of the frame modules 20, complementary lateral flanges 21 capable of receiving fastening members (not shown) such as bolts or Similar to ports 22. Any other method of assembly is possible. Each frame module 20 comprises a metal structure formed in particular of two longitudinal members 23 assembled to sleepers 24 distributed along their length to ensure the parallelism of the longitudinal members and the mechanical rigidity of the frame 2. Any other equivalent form of construction may also be suitable. These sleepers 24 carry dampers 25 in the form of silentblocs or the like, able to support the molding modules 30, in particular at the right of the longitudinal members 38b. These dampers 25 have the function of separating the continuous mold 3 from the chassis 2 during the vibrating of the concrete after pouring.

La construction du châssis 2 délimite un volume intérieur apte à recevoir le moule continu 3 par emboîtement, la largeur intérieure L entre les longerons 23 étant sensiblement égale à la largeur des modules de moulage 30 pour les bloquer transversalement.The construction of the frame 2 delimits an interior volume adapted to receive the continuous mold 3 by interlocking, the internal width L between the longitudinal members 23 being substantially equal to the width of the molding modules 30 to block them transversely.

En référence plus particulièrement aux figures 3 à 5, le châssis 2 peut reposer au sol sur une dalle en béton 5 par exemple, et peut être fixé par des pattes de fixation (non représentées) rapportées, en appui sur une bordure du châssis et vissées dans la dalle, ou par tout autre moyen équivalent. Le moule continu 3 est quant à lui bloqué par rapport au châssis 2 pour empêcher tout glissement au moment du relâchement de la précontrainte, comme expliqué plus loin, ce blocage étant localisé de préférence en un point fixe. Dans l'exemple illustré, ce point fixe est constitué d'une pièce de blocage 26 protubérante prévue sur le châssis 2 et d'un logement 27 prévu sur le module de moulage 30 correspondant, le logement 27 étant apte à recevoir la pièce de blocage 26 avec un jeu minimum. La configuration inverse, c'est à dire la pièce de blocage 26 sur le module de moulage 30 et le logement 27 sur le châssis 2 est également possible. Ce point fixe est de préférence localisé à une extrémité du banc de moulage 1.With particular reference to Figures 3 to 5 , the frame 2 can rest on the ground on a concrete slab 5 for example, and can be fixed by fastening lugs (not shown) reported, resting on a border of the frame and screwed into the slab, or by any other means equivalent. The continuous mold 3 is in turn locked relative to the frame 2 to prevent slippage at the release of the preload, as explained below, this blocking being located preferably at a fixed point. In the example illustrated, this fixed point consists of a protruding blocking piece 26 provided on the frame 2 and a housing 27 provided on the corresponding molding module 30, the housing 27 being able to receive the piece. blocking 26 with a minimum clearance. The reverse configuration, that is to say the locking piece 26 on the molding module 30 and the housing 27 on the frame 2 is also possible. This fixed point is preferably located at one end of the molding bench 1.

Ce type de banc de moulage 1 peut être équipé de moyens de mise en précontrainte (non représentés) de câbles qui s'étendent tout le long du banc de moulage 1 à l'intérieur des empreintes 4. Ces moyens de mise en précontrainte comportent de manière connue un chevêtre fixe disposé à une extrémité du banc et un chevêtre mobile disposé à l'autre extrémité du banc, auxquels sont fixés les câbles de précontrainte. Dans cette configuration, le point fixe est de préférence localisé du côté du chevêtre fixe, plus précisément dans le premier module de moulage 30, dans le but de contraindre les modules de moulage 30 en direction du chevêtre fixe lors du relâchement de la précontrainte, évitant ainsi tout risque de déboîtement des modules. Toujours dans cette configuration, le chevêtre fixe est de préférence fixé directement au châssis 2 par l'intermédiaire des brides latérales 21 gauche et droite. Ce mode d'assemblage permet la reprise des efforts de précontrainte dans les longerons 23 du châssis 2 et de supprimer la fixation au sol du chevêtre fixe.This type of molding bench 1 may be equipped with prestressing means (not shown) of cables which extend all along the molding bench 1 inside the cavities 4. These prestressing means comprise in known manner a fixed trimmer disposed at one end of the bench and a movable trimmer disposed at the other end of the bench, to which the prestressing cables are fixed. In this configuration, the fixed point is preferably located on the side of the fixed header, more precisely in the first molding module 30, in order to constrain the molding modules 30 towards the fixed header when releasing the prestress, avoiding thus any risk of dislocation of the modules. Still in this configuration, the fixed trimmer is preferably fixed directly to the frame 2 via the side flanges 21 left and right. This method of assembly allows the resumption of prestressing forces in the longitudinal members 23 of the frame 2 and to eliminate the ground fixing of the fixed head.

Possibilités d'application industrielle :Possibilities of industrial application:

Le banc de moulage 1 tel que décrit est conçu de manière classique en pièces, profilés et tôles métalliques assemblés notamment par soudure ou similaire. Sa conception modulaire et démontable lui permet d'être facilement et rapidement mise en place sur un site industriel sans nécessiter de travaux de gros oeuvres. Une fois assemblé, il est opérationnel et permet la fabrication d'éléments linéaires tels que des poutres ou des poutrelles ou similaires, en positionnant des peignes à des intervalles prédéterminés dans le moule continu 3 pour délimiter la longueur desdits éléments, ces longueurs pouvant être différentes d'une série à l'autre. Les séries d'éléments linéaires peuvent se succéder à l'intérieur du moule continu 3, sans perte de volume, en optimisant le remplissage des empreintes 4 sur toute la longueur du banc, à l'inverse des moules de l'art antérieur.The molding bench 1 as described is conventionally designed in parts, profiles and metal sheets assembled in particular by welding or the like. Its modular and removable design allows it to be easily and quickly set up on an industrial site without the need for major works. Once assembled, it is operational and allows the manufacture of linear elements such as beams or beams or the like, by positioning combs at predetermined intervals in the continuous mold 3 to delimit the length of said elements, these lengths may be different from one series to another. The series of linear elements can succeed one another inside the continuous mold 3, without loss of volume, optimizing the filling of the imprints 4 over the entire length of the bench, unlike the molds of the prior art.

Il ressort clairement de cette description que l'invention permet d'atteindre tous les buts fixés. Comme on vient de le démontrer, le fait de disposer d'un banc de moulage 1 d'un seul tenant permet d'optimiser la répartition des éléments linéaires à fabriquer. Le fait de ne plus avoir de modules discontinus et séparés facilite la coulée du béton et supprime les opérations de nettoyage entre les modules. Le choix du point de fixation du moule continu 3 par rapport au châssis 2 permet de répartir dans une certaine mesure les dilatations des modules de moulage 30 de part et d'autre du point fixe, tout en obligeant les modules de moulage 30 à glisser vers ce point fixe, ce qui évite tout risque de déboîtement des modules entre eux, sans solliciter les soudures à froid dont le rôle est d'avantage de colmater la zone de jonction 42 entre les modules de moulage 30 que de les solidariser.It is clear from this description that the invention achieves all the goals. As just demonstrated, the fact of having a molding bench 1 in one piece optimizes the distribution of linear elements to manufacture. The fact of no longer having discontinuous and separated modules facilitates the pouring of concrete and eliminates the cleaning operations between the modules. The choice of the fixing point of the continuous mold 3 with respect to the frame 2 makes it possible to distribute to a certain extent the expansions of the molding modules 30 on either side of the fixed point, while forcing the molding modules 30 to slide towards this fixed point, which avoids any risk of disengagement of the modules between them, without soliciting cold soldering whose role is to seal the junction area 42 between the molding modules 30 to join them.

La présente invention n'est pas limitée à l'exemple de réalisation décrit mais s'étend à toute modification et variante évidentes pour un homme du métier tout en restant dans l'étendue de la protection définie dans les revendications annexées.The present invention is not limited to the embodiment described but extends to any modification and variation obvious to a person skilled in the art while remaining within the scope of protection defined in the appended claims.

Claims (14)

Banc de moulage (1) pour fabriquer des éléments linéaires notamment en béton, ce banc de moulage comportant un châssis (2) apte à recevoir un moule continu (3) comportant des empreintes (4) parallèles s'étendant sur une longueur prédéfinie agencées pour pouvoir fabriquer lesdits éléments linéaires par série d'éléments parallèles et dans le prolongement axial les uns des autres, ledit moule continu (3) étant constitué de plusieurs modules de moulage (30) assemblés bout à bout, caractérisé en ce que lesdits modules de moulage (30) sont assemblés bout à bout par des moyens d'emboîtement intégrés et associés à des moyens de fixation de manière à assurer l'alignement et la rectitude desdites empreintes (4) sur toute la longueur dudit banc de moulage (1).Bench (1) for manufacturing linear elements, in particular concrete, this molding bench comprising a frame (2) able to receive a continuous mold (3) having parallel impressions (4) extending over a predefined length arranged to being able to manufacture said linear elements by series of parallel elements and in axial extension of each other, said continuous mold (3) consisting of several molding modules (30) assembled end to end, characterized in that said molding modules (30) are assembled end-to-end by integrated engagement means and associated with fastening means so as to ensure the alignment and straightness of said indentations (4) over the entire length of said molding bench (1). Banc de moulage selon la revendication 1, caractérisé en ce que lesdits moyens d'emboîtement intégrés comportent aux extrémités des modules de moulage (30) respectivement une partie mâle (31) et une partie femelle (32) complémentaires.Molding bench according to claim 1, characterized in that said integrated interlocking means comprise at the ends of the molding modules (30) respectively a complementary male part (31) and a female part (32). Banc de moulage selon la revendication 2, caractérisé en ce que la partie femelle (32) est constituée par la surface extérieure des parois latérales (40) et du fond (41) desdites empreintes (4) et la partie mâle (31) comporte des pièces de centrage (33, 34) prolongeant lesdites parois latérales (40) et le fond (41) desdites empreintes (4).Molding bench according to Claim 2, characterized in that the female part (32) consists of the external surface of the side walls (40) and the bottom (41) of the said indentations (4) and the male part (31) comprises centering pieces (33, 34) extending said side walls (40) and the bottom (41) of said indentations (4). Banc de moulage selon la revendication 1, caractérisé en ce que lesdits moyens de fixation comportent aux extrémités des modules de moulage (30) des brides latérales (36) complémentaires aptes à recevoir des organes de fixation.Molding bench according to claim 1, characterized in that said fixing means comprise at the ends of the molding modules (30) complementary lateral flanges (36) adapted to receive fasteners. Banc de moulage selon la revendication 1, caractérisé en ce que chaque module de moulage (30) comporte des traverses (38a) agencées pour rigidifier ledit module, supporter lesdites empreintes (4) et assurer leur alignement et leur rectitude sur la longueur dudit module.Molding bench according to claim 1, characterized in that each molding module (30) comprises crosspieces (38a) arranged to stiffen said module, support said indentations (4) and ensure their alignment and straightness along the length of said module. Banc de moulage selon la revendication 1, caractérisé en ce que la zone de jonction (42) entre les modules de moulage (30) consécutifs est recouverte d'un cordon de soudure à froid.Molding bench according to claim 1, characterized in that the junction zone (42) between the consecutive molding modules (30) is covered with a cold weld bead. Banc de moulage selon la revendication 1, caractérisé en ce que lesdits modules de moulage (30) ont une largeur apte à s'emboîter dans ledit châssis (2).Molding bench according to claim 1, characterized in that said molding modules (30) have a width adapted to fit into said frame (2). Banc de moulage selon la revendication 1, caractérisé en ce que ledit moule continu (3) est bloqué par rapport audit châssis (2) en un point fixe.Molding bench according to claim 1, characterized in that said continuous mold (3) is locked with respect to said frame (2) at a fixed point. Banc de moulage selon la revendication 8, caractérisé en ce que ledit point fixe comporte une pièce de blocage (26) protubérante prévue sur le châssis (2) ou le module de moulage (30) correspondant et un logement (27) prévu sur le module de moulage (30) ou le châssis (2), ledit logement (27) étant apte à recevoir ladite pièce de blocage (26) protubérante avec un jeu minimum.Molding bench according to claim 8, characterized in that said fixed point comprises a protruding blocking piece (26) provided on the frame (2) or the corresponding molding module (30) and a housing (27) provided on the module molding (30) or the frame (2), said housing (27) being adapted to receive said protruding locking piece (26) with a minimum clearance. Banc de moulage selon la revendication 8, caractérisé en ce que ledit point fixe (26, 27) est localisé à une extrémité dudit banc de moulage (1).Mold bench according to claim 8, characterized in that said fixed point (26, 27) is located at one end of said molding bench (1). Banc de moulage selon la revendication 10, ce banc étant équipé de moyens de mise en précontrainte de câbles s'étendant tout le long dudit banc et comportant un chevêtre fixe à une extrémité du banc et un chevêtre mobile à l'autre extrémité du banc, caractérisé en ce que ledit point fixe (26, 27) est localisé du côté dudit chevêtre fixe.Molding bench according to claim 10, this bench being equipped with cable prestressing means extending along said bench and comprising a fixed head at one end of the bench and a movable head at the other end of the bench, characterized in that said fixed point (26, 27) is located on the side of said fixed trimmer. Banc de moulage selon la revendication 11, caractérisé en ce que ledit châssis (2) est constitué de modules de châssis (20) assemblés bout à bout et agencés pour assurer l'alignement desdits modules (20) sur toute la longueur dudit banc de moulage (1).Molding bench according to claim 11, characterized in that said frame (2) consists of frame modules (20) assembled end to end and arranged to ensure the alignment of said modules (20) over the entire length of said molding bench (1). Banc de moulage selon la revendication 12, caractérisé en ce que lesdits modules de châssis (20) sont assemblés par des moyens de fixation comportant aux extrémités des modules de châssis (20) des brides latérales (21) complémentaires aptes à recevoir des organes de fixation.Molding bench according to claim 12, characterized in that said frame modules (20) are assembled by fastening means comprising at the ends of the frame modules (20) complementary lateral flanges (21) adapted to receive fasteners . Banc de moulage selon la revendication 13, caractérisé en ce que lesdits chevêtres sont fixés directement aux brides latérales (21) dudit châssis (2).Molding bench according to claim 13, characterized in that said trimmers are attached directly to the side flanges (21) of said frame (2).
EP09360004A 2008-01-17 2009-01-13 Moulding bench for producing linear elements, in particular from concrete Active EP2080601B1 (en)

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FR0800242A FR2926483B1 (en) 2008-01-17 2008-01-17 MOLDING BENCH FOR MANUFACTURING LINEAR ELEMENTS, IN PARTICULAR CONCRETE

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Publication number Priority date Publication date Assignee Title
BE1022960B1 (en) * 2015-06-29 2016-10-24 Houtland Beton Nv Adjustable formwork for one or more concrete columns with base plate

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1334539A (en) 1962-06-29 1963-08-09 Veran Costamagna & Cie Improvements to molding devices for concrete elements
GB1359627A (en) 1971-10-27 1974-07-10 Monier Concrete Ind Production method and means for concrete articles
US4149306A (en) 1978-02-06 1979-04-17 Charles Pankow, Inc. Portable tensioning system for producing pre-stressed concrete beams
US6374475B1 (en) 1995-02-02 2002-04-23 David P. Ollendick Method for manufacturing prestressed reinforced concrete railroad ties

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1334539A (en) 1962-06-29 1963-08-09 Veran Costamagna & Cie Improvements to molding devices for concrete elements
GB1359627A (en) 1971-10-27 1974-07-10 Monier Concrete Ind Production method and means for concrete articles
US4149306A (en) 1978-02-06 1979-04-17 Charles Pankow, Inc. Portable tensioning system for producing pre-stressed concrete beams
US6374475B1 (en) 1995-02-02 2002-04-23 David P. Ollendick Method for manufacturing prestressed reinforced concrete railroad ties

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE1022960B1 (en) * 2015-06-29 2016-10-24 Houtland Beton Nv Adjustable formwork for one or more concrete columns with base plate

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PL2080601T3 (en) 2013-01-31
FR2926483A1 (en) 2009-07-24
EP2080601B1 (en) 2012-08-15
FR2926483B1 (en) 2012-10-26

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