Plastic Zone Analysis of Deep-Buried, Noncircular Tunnel and Application on the High-Speed Railway in the Karst Area

Table 1

Physical and mechanical parameters of the surrounding rock.

Density; (kg/m^3)	Elastic modulus; (GPa)	Poisson’s ratio; μ	Material cohesive force; (MPa)	Material frictional angle; (°)	Permeability coefficient
2550	2.1	0.25	0.2	53