Influence of lining tunnel on sub-ground motion for incident plane SH wave excitation

Taking the influence of underground tunnel on the dynamic characteristics of the nearby site as the researched objective, this paper analyzed the scattering of incident plane SH wave resulted from circular lining tunnel in elastic half space by using the wave function expansion method and the image theory based on the elastic wave theory, and then obtained the series solution of the site displacement near the underground circular lining tunnel. Numerical examples are used to analyze the influence of the underground circular tunnel on the dynamic response of the site, i.e., the influence of SH wave incidence angle, incident frequency, tunnel depth and lining stiffness on the dynamic response of soil around the tunnel with depth. The results show that underground tunnel has a significant impact on sub-ground motion along the site.