This paper describes an original approach to the problem of designing tunnel linings
against seismic effects consisting in the determination of most unfavourable lining stress state at different combinations and any directions of long longitudinal and shear waves propagating in the plane of
the tunnel cross-section. The analytical methods based on that approach are developed for designing
tunnel linings of arbitrary cross-sectional shape, including the linings constructed with the application
of rock grouting, circular linings including the multi-layer ones of mutually influencing parallel tunnels.
The proposed method is illustrated by examples of calculations.