To　investigate　the　effect　of　site　specificity　on　the　seismic　response　of　underground　structures,　two　centrifuge　shaking　table　tests　under　adverse　soil　site　conditions　were　carried　out,　considering　the　case　of　structures　placed　in　saturated　clay　sites　and　saturated　sand　sites,　respectively.　Through　the　comparison　of　typical　test　results,　the　seismic　response　law　of　underground　structures　and　soil　sites　in　adverse　soil　sites　are　investigated　and　the　damage　patterns　of　underground　structures　under　adverse　soil　sites　are　attempted　to　be　revealed.　The　test　results　show　that　the　column　is　the　seismically　weak　member　of　the　subway　station　structure,　and　its　top　and　bottom　is　the　earthquake　damage-prone　position　of　the　member.　Underground　structures　are　more　severely　damaged　in　all-clay　sites　than　in　liquefiable　sites.　The　liquefiable　site　becomes　a　natural　vibration　isolation　system　for　underground　structures.　With　the　increase　of　earthquake　amplitude,　the　liquefaction　degree　of　the　saturated　sandy　soil　layer　increases,　and　the　increase　in　horizontal　displacement　for　liquefiable　sites　is　increasing　compared　to　all-clay　sites.　Although　the　liquefaction　of　the　saturated　sand　layer　resulted　in　large　horizontal　displacements　at　the　site,　the　structure　did　not　experience　large　inter-story　drifts　compared　to　the　all-clay　site,　which　may　have　been　caused　by　the　reduction　in　the　soil-structure　stiffness　ratio　due　to　the　liquefaction　of　the　sand　layer.　©　2024