Abstract: As an important node in urban rail transit network, the exchange station connects different major metro lines, which offers a very convenience experience for the commute passengers. There are two construction methods of an exchange station: one stage construction and phased construction. For a phased construction exchange station, the excavation of the station foundation structure will have an impact of the existing station and rail tracks. A three-dimension finite element model was established to analysis the new station construction on the existing station and rail tracks. Based on the numerical results, the supporting structure design was optimized, and the potential construction hazards and their remediation methods are also discussed in this paper.

Key words: Exchange Station, Deep Excavation, Existing Subway, Finite Element Analysis