Abstract: A three-dimensional numerical model of the station including the station structure, entrances and exits, the ventilation pavilion and the ventilation tunnel was established. The influence of the deep excavation and construction of the three new towers on the displacement of the existing station structure are analyzed. The following conclusions are obtained: the excavation stage has the most obvious influence on the existing railway structure and is the critical stage for protecting the existing structures; the stability of the existing structure can be effectively protected by steel pipe piles, steel mesh and angle steel braces; under the same conditions, among the factors affecting the excavation, the location of the structure is higher than the scale of the structure.

Key words: Station Adjunct Structures, Station Structure, Foundation Excavation, Tower Buildings, 3D Simulation