In order to investigate the effects of different working conditions and key parameters on the stress

deformation and displacement of frame-shear structure underground substation

based on the actual underground substation project

an in-depth study is carried out by using the finite element analysis software SAP2000.The results show that the floor de-sign of underground substation is determined by anti-floating under construction conditions

the external wall design is determined by groundwater level under operating conditions

the internal component design is determined by equipment load and groundwater level under operating conditions

and the seismic conditions have no con-trolling effect on component design;with or without earthquake action and seismic fortification intensity

the lateral displacement of external wall and axial force of beam in underground substation are significantly affected

and the displacement and bending moment of raft foundation are affected to a certain extent

but the influence on bending moment of external wall

shear force and bending moment of beam and internal force of frame column is not obvious;with the increase of groundwater level

except that the downward displacement of raft foundation de-creases gradually

the internal force and deformation of raft foundation

exterior wall

beam and other main members all increase in varying degrees;with the increase of the thickness of the external wall

the lateral de-formation of the external wall decreases

the bending moment increases

and the downward displacement of the raft foundation increases;with the increase of the thickness of the raft foundation

the downward displacement of the raft foundation decreases

the bending moment increases

and the lateral deformation of the external wall decreases slightly.