E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
E21D15/00—Props; Chocks, e.g. made of flexible containers filled with backfilling material
E21D15/14—Telescopic props
E21D15/28—Telescopic props with parts held relatively to each other by friction or gripping
E21D15/32—Telescopic props with parts held relatively to each other by friction or gripping by a deformable collar or clamping means applied symmetrically inside a locking ring
E21D15/325—Telescopic props with parts held relatively to each other by friction or gripping by a deformable collar or clamping means applied symmetrically inside a locking ring by a clamping ring
Procédé de fabrication de panneaux plans par juxtaposition et assemblage de profilés longitudinaux, profilés mis en Óoeuvre, et panneaux plans réalisés.
Systeme de verrouillage complementaire des jambes sur un pont d'une plate-forme d'exploitation en mer et procedes de pose d'un tel systeme de verrouillage