利用地下圆形衬砌隧道对入射平面P波和SV波散射级数解答,定量分析了入射波长、入射角度、隧道直径、衬砌刚度等因素对沿线地表位移放大作用的影响。计算结果表明,当入射频率较低时,地下隧道的存在对地表位移幅值影响不大;而当入射频率较高时,地表位移幅值可以达到无隧道情况的4.5倍以上;衬砌情况下地表位移幅值可以高出非衬砌情况的87.8%。建议在地铁的规划设计中考虑地下隧道的建设对隧道沿线设计地震动的影响。 The effects of incident wavelength, incident angle, tunnel diameter and lining stiffness on surface displacement magnification along the line were quantitatively analyzed by using the solution of the P and SV wave scattering levels of the incident plane under the circular tunnel. The calculated results show that the underground tunnel has little influence on the displacement amplitude when the incident frequency is low, and 4.5 times more than the tunnel without high tunneling frequency. When the incident frequency is high, The displacement amplitude can be 87.8% higher than the non-lining case. It is suggested to consider the impact of the construction of underground tunnel on the design of ground motion along the tunnel in the planning and design of subway.