SPECIAL TIGHTENING SHOULDER FOR A TUNNEL, SET OF SUCH SPECIAL TIGHTS, COATING COMPRISING SUCH AN ASSEMBLY AND ASSOCIATED METHOD

摘要

The present invention relates to a special voussoir (10) for a coating (20) in a tunnel (30), the special voussoir (10) having: an inner face (11), intended to be oriented towards the interior of the tunnel in a assembled position; an outer face (12), opposite to the inner face (11) and intended to be oriented towards the outside of the tunnel in an assembled position; the special voussoir (10) being delimited laterally by side walls (13), said special voussoir (10) being characterized in that it comprises a groove (14) open on the side of the inner face (11) and having two ends ( 141, 142), each opening laterally with respect to the special voussoir (10) at the side walls (13), the groove (14) being delimited by a wall (15), preferably metallic, having an interior space (16) filled with a filling material (17).