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