Abstract: A reinforcement apparatus for reinforcing a structure comprising at least one pier bearing on foundations, a cross-beam bearing on said pier and at least one structure element located above the cross-beam, the reinforcement apparatus comprising at least one column (20) destined to surround the pier at least partly, to be mechanically coupled to the pier and to bear on said foundations, and at least one transverse beam (22) fixed relative to the column and destined to be mechanically coupled to the cross-beam, and at least one load transfer element (36) arranged on an upper face of said at least one transverse beam (22) to take up at least part of the load of the structure element.

Abstract: A method for establishing an air-tight connection between post-tensioning tendon ducts of two consecutive precast segments of a structure, each segment being cast with a recess opening out on a jointing face of the segment leaving an access to ends of the ducts. The method including connecting pairs of respective duct ends of the two consecutive segments together, and pouring a sealing material into the recesses of the two consecutive segments around the duct ends while preventing the material to enter the internal space of the ducts, thus forming an air-tight connection at the junction of ducts.

Abstract: A reinforcement apparatus for reinforcing a structure comprising at least one pier bearing on foundations, a cross-beam bearing on said pier and at least one structure element located above the cross-beam, the reinforcement apparatus comprising at least one column (20) destined to surround the pier at least partly, to be mechanically coupled to the pier and to bear on said foundations, and at least one transverse beam (22) fixed relative to the column and destined to be mechanically coupled to the cross-beam, and at least one load transfer element (36) arranged on an upper face of said at least one transverse beam (22) to take up at least part of the load of the structure element.