Abstract: FLAC^3D was employed to establish the numerical model of the foundation pit of Mingdu station of Wuhan subway line 2. By comparing the numerical analysis with field monitoring data, we analyzed the regularity of deformation caused by excavation. Results show that numerical analysis is consistent with field monitoring results. High-rise building Baolihuadu in the north of the foundation pit suffers small settlement owing to its pile foundation, and the settlement curve of the side-pit’s ground surface displays a triangle shape; while Tibetan school in the south undergoes large settlement because of its strip shallow foundation, with stepped settlement curve of the side-pit’s ground surface. The numerical simulation analysis could well reflect the deformation regularity, and could provide effective and reasonable basis for the informatized construction and the modification of foundation pit support scheme.

Key words: Fast Lagrangian Analysis of Continua in 3-dimensions (FLAC^3D), subway foundation pit, deformation regularity, numerical simulation analysis