Special tubing for lining an underground tunnel

摘要

Special tubbing (1) for a tubbing ring (2) comprises a cylindrical sleeve section-forming base body (3) for fitting in a tubbing ring. A connecting element (4) is provided on the inside of the cylindrical sleeve for connecting at least one supporting element (5) arranged on the inside of the tunnel and supporting the tubbing shell (6). An Independent claim is also included for a tubbing ring having at least two special tubbings. Preferred Features: The connecting element protrudes from the base body on the inside of the cylindrical sleeve and receives a compression tool (7). The special tubbing is made from steel tubbing or concrete tubbing.