Dynamic soil-tunnel interaction in layered half-space for incident P- and SV-waves

Abstract

The dynamic soil-tunnel interaction is studied by the model of a rigid tunnel embedded in layered half-space, which is simplified as a single soil layer on elastic bedrock to the excitation of P- and SV-waves. The indirect boundary element method is used, combined with the Green’s function of distributed loads acting on inclined lines. It is shown that the dynamic characteristics of soil-tunnel interaction in layered half-space are different much from that in homogeneous half-space, and that the mechanism of soil-tunnel interaction is also different much from that of soil-foundation-superstructure interaction. For oblique incidence, the tunnel response for in-plane incident SV-waves is completely different from that for incident SH-waves, while the tunnel response for vertically incident SV-wave is very similar to that of vertically incident SH-wave.