Study on the Mechanical Characteristics and Ground Surface Settlement Influence of the Rise–Span Ratio of the Pile–Beam–Arch Method

The pile–beam–arch method (PBA) is increasingly being used in the construction of metro stations with complex traffic conditions. rise–span ratio arch not only affects height station, but also rationality design subway and safety construction. mechanical response steel pipe piles different ratios effect controlled surface settlement have been investigated interactions involved pile–soil system. In this paper, finite element model each was established, demonstrated by comparing numerical simulation calculation field monitoring data. characteristics influence analysis deformation during excavation cave pile were investigated. results show that maximum axial force central first decreases then increases increase ratio. bending moment as increases, negatively correlated located at bottom plate. Due to symmetry structure, centre small, whole station side wall As increases. pilot tunnel upper most important factor leading settlement, so it necessary strengthen soil layer.