Study on Deformation Law of Deep Foundation Pit with the Top-Down Method and Its Influence on Adjacent Subway Tunnel

Table 3

Physical and mechanical parameters of the materials.

Materials	Thickness, H (m)	Elastic modulus, E (MPa)	Poisson ratio, µ	Unit weight, γ (kN/m^3)
Tunnel lining	0.35	34.5	0.2	26.5
Supporting structure	—	30.0	0.2	25.0
Slab	—	31.5	0.2	25.5