Analytical Solution for Seismic Response of Deep Tunnels Near a Fault Zone Subjected to SH Waves

A novel analytical solution for stresses and displacements of deep tunnels near a fault zone subjected to SH waves is presented. The ground, fault and liner are assumed as linear isotropic elastic, with a no-slip condition at all contact interfaces. It is assumed that the tunnel is parallel to the fault and therefore the displacements perpendicular to the tunnel axis are zero. The effect of the fault on the wave diffracted by the tunnel is neglected, to be able to obtain the solution. Validation of the proposed analytical solution is accomplished by comparing the results of the solution with those obtained from ABAQUS. The relevance of key parameters, namely: the stiffness ratio between the fault and the ground, the width of the fault, and the frequency of the incident SH wave, are discussed using the numerical results and analytical formulation.