DEVICE AND SYSTEM FOR DAMPING THE CONVERGENCE OF A FIELD, METHODS OF MANUFACTURING SUCH DEVICE AND SYSTEM

摘要

A system for damping the convergence of a field (2), the system comprising a coating (3) covering at least partly an outer wall (11) of a tunnel (4) formed by voussoirs (12) and located inside a cavity (13) dug in the ground (2), the coating (3) comprising a plurality of devices (1) each comprising a ceramic body delimiting at least one closed cavity.