Method and apparatus for forming a trench

E - Fixed Constructions – 04 – G

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Details

E04G 11/20 (2006.01) E02D 5/00 (2006.01) E03F 3/04 (2006.01)

Patent

CA 2131867

A trench forming assembly and removable form for forming a trench of predetermined shape is disclosed according to the present invention. The removable form includes an elongate form body having top, bottom and opposed side surfaces and first and second elongate form removal slots extending upwardly from the bottom surface of the form body. Preferably the removable form has a top surface defining a complex shape including at least a first upwardly extending ear portion which extends longitudinally along the top surface. At least a first form removal slot of this elongate form body extends into a portion of the first ear portion. Advantageously, the form body includes a pair of coplanar elongate slots integrally formed in the side surfaces for receiving a pair of frame members in a predetermined coplanar, spaced relationship above the bottom surface of the form body. In another embodiment, a removable form includes a second elongate form body portion extending laterally along one side surface of the elongate form body and having a predetermined shape for forming a structure having a corresponding shape, such as a curb.

Cette invention concerne un dispositif de profilage de tranchée et un noyau amovible de forme prédéterminée servant à cette fin. Le noyau amovible présente une forme allongée définie par un dessus, un fond et des faces latérales opposées et comportant une première et une seconde rainures se prolongeant du fond vers le haut et servant à son extraction de la tranchée profilée. De préférence, le noyau amovible présente un dessus de forme complexe comprenant au moins un rebord faisant saillie vers le haut et faisant toute sa longueur. Chaque rainure d'extraction du noyau se prolonge jusque dans la partie inférieure du rebord correspondant en partie haute. Le noyau comporte également une paire d'ailes latérales allongées et coplanaires qui sont destinées chacune à recevoir un profilé servant à le surélever par rapport au fond de la tranchée. Une autre variante du noyau amovible comprend d'un côté une seconde partie allongée de forme prédéterminée servant à la coulée d'un élément de forme correspondante, une bordure par exemple.

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