High-strength concrete wall formwork

Details High-strength concrete wall formwork High-strength concrete wall formwork

E - Fixed Constructions

04

B

E04B 2/86 (2006.01)

Patent

CA 2544521

The aim of this invention is to increase the rigidity of the integrated formworks at the time of their installation, to facilitate the work of the civil engineers in order to determine easily the contribution of the horizontal frameworks and to reduce manufacturing costs. This aim is reached by a formwork including two parallel formwork walls (1, 1') placed one facing the other provided with shaped bars forming the vertical stiffeners (2, 2') and connected by at least one articulated connection device allowing the maintenance of the formwork walls (1, 1') either at a distance defining a space to receive a filler such as concrete, or folded for storage and transport. The connection device is characterized in that it includes a first rectilinear horizontal bar (3) parallel to the first formwork wall (1) and passing through the stiffeners (2) of said first wall (1), a second rectilinear horizontal bar (3') parallel to the second formwork wall (1') and going through the stiffeners (2') of said second wall (1'), said second bar (3') being situated facing the first bar (3), and a plurality of connection bars (4) perpendicularly linking the two horizontal bars (3, 3'), said connection bars (4) being articulated around said horizontal bars (3, 3').

Le but de la présente invention est d'augmenter la rigidité des coffrages intégrés lors de leur mise en place, de faciliter le travail des ingénieurs civils qui peuvent déterminer aisément la contribution des armatures horizontales tout en diminuant les coûts de fabrication de ceux-ci. Ce but est atteint par un coffrage comportant deux parois coffrantes (1, 1') parallèles placées l'une en face de l'autre munies de barres profilées formant des raidisseurs (2, 2') verticaux et connectées par au moins un dispositif de liaison articulé permettant de maintenir les parois coffrantes (1, 1') soit à un écartement définissant un espace destiné à recevoir un matériau de remplissage tel que le béton, soit repliées pour le stockage et le transport. Le dispositif de liaison est caractérisé en ce qu'il comprend une première barre horizontale (3) rectiligne parallèle à la première paroi coffrante (1) et traversant les raidisseurs (2) de ladite première paroi (1), une seconde barre horizontale (3') rectiligne parallèle à la seconde paroi coffrante (1') et traversant les raidisseurs (2') de ladite seconde paroi (1'), ladite seconde barre (3') étant située en regard de la première barre (3), et une pluralité de barres de liaison (4) reliant perpendiculairement les deux barres horizontales (3, 3'), lesdites barres de liaison (4) étant articulées autour desdites barres horizontales (3, 3').

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