Fuzzy Risk Assessment of Tunnels’ Undercrossing Existing Structures

Table 5

Physical and mechanical parameters of the materials.

The structures’ name	Material	Severe, kN/m^3	Modulus of elasticity, GPa	Poisson’s ratio
Subgrade structure	C40 reinforced concrete	25	32.5	0.3
Rail	Carbon steel	78	210.0	0.3
Secondary lining	C25	25	28.0	0.3
Shotcrete	C20	25	25.5	0.3