Finite element comparative analysis on the influence of new commercial development on subway station structure

Abstract

The newly added commercial projects can effectively connect the subway station with the original commercial ones, and their constructions and breaking holes for the station exterior wall have an impact on the adjacent station structure. The risk analysis of the renovation construction is necessary for the insurance of the station safe operation. Combined with the renovation commercial project, Finite Element methods are adopted to simulate the construction process and the influences on the adjacent station structure are evaluated. The maximum lateral displacement of the station exterior wall for two three-dimensional models are 3.7 mm and 3.8 mm, respectively. The maximum lateral displacement and maximum vertical displacement of the station structure by two-dimensional model are 4.1 mm and 5.2 mm, respectively, and the bending moment and shear force of the station exterior wall increase by 4%. Considering the restriction effect of the transverse wall in two three-dimensional models, the maximum bending moment of the station exterior wall has a small difference and is smaller than that of two-dimensional model, and the opening width of the outer wall of the station is 0.2 mm. The force between piles for two three-dimensional models is close and the construction has little influence on the tenon joint.