JPH05501B

Formwork method, inner and outer formwork and linking parts used for the erection of circular constructions, for example cylindrical or spherical constructions. According to the method, a formwork surface (2) having the height of the wall to be cast is erected. Thereafter the casings are set in place and the second surface (2) of the formwork is pulled upwardly by runs of 50 cm, while introducing the concrete each time the formwork is lifted. The formworks (2) are comprised of flexible ring metal sheets. The rings are tensioned to obtain a stable form. The metal sheets are held together by key assemblies comprising retractable wedges between the supports and the clamps of the metal sheets.