A reasonable model is proposed of soil-underground structure interaction with viscous-elastic artificial boundary condition on both sides and with restrictions at the buttom.By using FEM software

the effects of some key factors

such as the buried depth

the condition of soil layers and the styles of structure

on the earthquake-resistant capacity of underground structure are studied.It is demonstrated that the buried depth has great effects on the seismic response of underground structure

and the earthquake-resistant capacity of structure can be improved greatly if the soil layers and type of structure are appropriately selected.