Structure for passage under an embankment

Details Structure for passage under an embankment Structure for passage under an embankment

E - Fixed Constructions

02

D

E02D 29/045 (2006.01)

Patent

CA 2322980

The invention concerns a structure for passage under an embankment (12), delimited by a tubular wall (1), comprising, in cross-section transverse to its axis (O), at least three elements, respectively a top element (3) supported by its lateral sides (31, 31') on the upper edges (21) of two side elements (2, 2') having a top part curved towards the axis (O). The invention is characterised in that each top element (3) comprises a wall (30) having a transverse profile with double curvature comprising a central part (33) with slight curvature extended by two end parts (34, 34') each having a common radius of curvature with the upper curved part (24, 24') of the corresponding side element (2, 2') and associated with at least a stiffening rib (32). The invention is particularly useful for building structures with large cross-section for road or railway traffic.

L'invention a pour objet un ouvrage de passage sous remblai (12), limité par une paroi tubulaire (1) comprenant, en section transversale à son axe (O), au moins trois éléments, respectivement un élément supérieur (3) reposant par ses côtés latéraux (31, 31'), sur les bords supérieurs (21) de deux éléments de côté (2, 2') ayant une partie supérieure (24, 24') incurvée du côté de l'axe (O). Selon l'invention, chaque élément supérieur (3) comprend une paroi (30) ayant un profil transversal à double courbure comprenant une partie centrale (33) à faible courbure prolongé par deux parties extrêmes (34, 34') ayant chacune un même rayon de courbure que la partie supérieure incurvée (24, 24') de l'élément de côté (2, 2') correspondant et associée à au moins une nervure de raidissement (32). L'invention s'applique spécialement à la réalisation d'ouvrages de grande section pour la circulation ferroviaire ou routière.

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