Abstract: As the construction of metro station becomes more and more intensive, more and more metro stations are connected to the surrounding commercial facilities, so the evaluation of the structure design of the metro station connected to the surrounding commercial structures becomes more and more important. This paper presents a case history of the surrounding commercial subway station in Nanchang. The PLAXIS finite element software and SAP2000 are used to perform the retaining structure and the main structure analysis under different working conditions. These analyses provide a reference for the similar subway station structure design. The results show that: 1) the horizontal constraints, such as plate support and other horizontal constraints, which connect with the surrounding businesses, can control the horizontal displacement of the internal structure of the subway station and ensure the safety of the deep excavation. 2) the main structure under the eccentric load and the load results under the non-eccentric loading conditions have a large difference. Under the eccentric load condition, the bending moments in main structure of roof and side wall are very large so that the proper reinforcement in these areas should be considered in the structure design.

Key words: Metro Station, Structural Design, Finite Element Simulation