With the rise of prefabricated metro stations in metro construction, the
selection of its block type has become a key issue under specific stratigraphic
conditions. In this paper, three types of prefabricated metro stations (Type 1,
Type 2 and Type 3) are studied in the stratum of a metro station in Shenzhen as
an example. Through MIDAS GTS NX, a single-ring stratum-structure model is
established and the same calculation step is set to analyse the mechanical
response of precast component assembly to the concrete at the bottom of the pit
and the bottom slab. In terms of the concrete at the base of the footing, the
stress of Type 3 has an advantage but the overall fluctuation is complicated,
the stress of Type 2 fluctuates greatly and the stress of some nodes is high,
and the change of Type 1 is relatively smooth; in terms of deformation, Type 2
and Type 3 settle symmetrically, and the influence of Type 2 is small. For
precast structural base plate, stress on type 3 part of the stage of stress
mutation, type 1 and type 2 have less impact; deformation on type 1 uniform
contraction, type 2 small and complex change in the early stage of the late node
difference, type 3 discrete and localized concentration. Comprehensive
assessment shows that the type 2 integrated performance is the best, in the
basal concrete deformation impact is small and structural stability, force and
type 1 similar to the bottom plate force impact is small, compared to type 3 can
better ensure the overall structural stability and force performance, can be
assembled subway station selection and construction to provide reference.