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A series solution for surface motion amplification due to underground twin tunnels: incident SV waves

Liang Jianwen (梁建文)1, Zhang Hao (张浩)1 and Vincent W Lee2

Department of Civil Engineering, Tianjin University, Tianjin 300072, China
Department of Civil Engineering, University of Southern California, Los Angeles, CA 90089-2531,USA

Abstract: A series solution of displacement response of the ground surface in the presence of underground twin tunnels subjected to excitation of incident plane SV waves is derived by using Fourier-Bessel series expansion method. The numerical parametric study shows that underground twin tunnels significantly amplify the nearby surface ground motion. It is suggested that the effect of subways on ground motion should be considered when the subways are planned and designed.

Keywords: underground twin tunnels; surface motion; plane SV wave; scattering; series solution