Performance Investigation of Tunnel Lining with Cavities around Surrounding Rocks

Table 2

Material properties of concrete lining and surrounding rocks.

Material	Physical and mechanical parameters
Surrounding rock	E = 500 MPa, ρ = 2200 kg/m^3, μ = 0.35, c = 200 kPa, φ = 30°
Concrete lining	E = 28 GPa, ρ = 2400 kg/m^3, fc^’ = 11 MPa, ft = 1.1 MPa, μ = 0.2