METHOD FOR CONSTRUCTION OF TUNNEL LINING AND TUNNEL LINING Russian patent published in 1995 - IPC

FIELD: construction. SUBSTANCE: tunnel lining has block rings, each of which is split in longitudinal direction and consists of two components in form of rings. Conjugated surfaces of components have spherical protrusion and depression with radius equalling external radius of block ring. Prior to setting block rings into design position, their spherical protrusions and depressions are joined by longitudinal connections, and after supply of flexible plastic mixture on external surface of block rings and its hardening, the longitudinal connections are disconnected. EFFECT: higher efficiency. 5 cl, 4 dwg