Abstract: The deep excavation case history of the East Square of Hefei West-Railway-Station is presented in this paper. A three-dimensional numerical model of deep excavation was established by using PLAXIS3D software to investigate the impact of deep excavation construction in a complex environment on the adjacent rail transit structure of Metro Line No. 3. The analysis shows that the deep excavation the East Square of the West-Railway-Station induced horizontal displacement and vertical settlement of 0.87mm and 0.80mm respectively. The maximum horizontal displacement and vertical settlement of the entrance and exit structure were 2.60mm and 2.11mm respectively; the horizontal displacement and vertical settlement of the section tunnel near Hefei West-Railway-Station adjacent to Metro Line No. 3 were 0.58mm and 0.54mm respectively. All deformations met the requirements. The research results provide a scientific engineering case for the design and construction of similar projects in this area.

Key words: Deep Excavation, Adjacent to the Subway, Lateral Displacement, Settlement