Girder element for concrete formwork comprising a structure...

E - Fixed Constructions – 04 – G

Patent

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Details

E04G 11/50 (2006.01) E04G 11/56 (2006.01)

Patent

CA 2687832

A girder element (1; 21; 31; 41; 53-57) for concrete formwork comprises a girder (4) for receiving external forces (10), a tension rod (5) extending behind the girder (4) and at least one lengthwise adjustable tensioning device that is interposed between the girder (4) and the tie rod (5), the local distance between the girder (4) and the tie rod (5) being adjustable by means of said tensioning device. The invention is characterized in that the lengthwise adjustable tensioning device is configured as a lengthwise adjustable compensation device (6; 6a, 6b) which is motor driven to adjust the length of the compensation device (6; 6a, 6b). A measuring device is used to determine the position (x) of the girder (4) in the area of the compensation device (6; 6a, 6b) relative to a desired position (xs). A control device (12) is used to adjust the length (L) of the compensation device (6; 6a, 6b) depending on the position (x) of the girder (4). The girder element according to the invention allows the precise and cost-effective manufacture of any concrete structures.

L'invention concerne un élément porteur (1; 21; 31; 41; 53-57) pour un coffrage en béton, qui comprend une poutrelle (4) destinée à absorber des forces extérieures (10), un tirant (5), s'étendant derrière la poutrelle (4), et au moins un dispositif tendeur réglable en longueur, placé entre la poutrelle (4) et le tirant (5), dispositif au moyen duquel la distance locale entre la poutrelle (4) et le tirant (5) peut être réglée. L'invention se caractérise en ce que le dispositif tendeur réglable en longueur est réalisé sous la forme d'un dispositif de compensation (6; 6a, 6b) réglable en longueur, pourvu d'un système d'entraînement motorisé permettant de régler la longueur du dispositif de compensation (6; 6a, 6b); un dispositif de mesure est prévu pour permettre de déterminer la position (x) de la cible (4) au niveau du dispositif de compensation (6; 6a; 6b) par rapport à une position de consigne (xs) et un dispositif de commande (12) est prévu pour permettre de régler la longueur (L) du dispositif de compensation (6; 6a, 6b) en fonction de la position (x) de la poutrelle (4). L'élément porteur selon l'invention permet de réaliser n'importe quelle structure en béton de façon précise et économique.

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