E - Fixed Constructions – 01 – D
Patent
E - Fixed Constructions
01
D
E01D 21/00 (2006.01)
Patent
CA 2528099
The present invention refers to a gantry for use in the construction process of bridges, viaducts and other structures, said gantry being equipped with a system that automatically adjusts the prestressing of the said gantry's structure in accordance to the external actions being applied on it when loadings occure. The adjustment of the prestressing is achieved through the use of at least one sensor (2) that monitors the structure, said sensors conveying those measurements to a controller (6), said controller (6) being then capable of activating at least one actuator which alters the tension of the structure's prestressing cable or cables. Amongst the many advantages of the present invention, one is the possibility of applying a large amount of prestressing without this implying undesirable deformations in the main structure (1) when exterior loads are not applied.
L'invention concerne un portique utilisé pour la construction de ponts, de viaducs ou d'autres structures. Ce portique est équipé d'un système permettant de régler automatiquement la précontrainte de la structure de ce portique en fonction des actions extérieures exercées sur ladite structure au moment du chargement. Le réglage de la précontrainte s'effectue par l'intermédiaire d'au moins un détecteur (2) qui contrôle la structure, lesdits détecteurs transférant ces mesures à un contrôleur (6) pouvant ensuite exciter au moins un organe de commande modifiant la tension du ou des câbles de précontrainte de cette structure. Parmi les nombreux avantages de l'invention, l'un consiste en la possibilité d'application d'un niveau élevé de précontrainte sans provoquer de déformations indésirables de la structure principale (1) dans le cas de l'absence d'application de charges extérieures.
Goudreau Gage Dubuc
Pacheco Pedro Alvares Ribeiro Do Carmo
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