Deformation Characteristics of the Surrounding Rock of a Six-Lane Multiarch Tunnel under Different Excavation Conditions

Table 1

Main physical and mechanical parameters of surrounding rock.

Density (g/cm^3)	Uniaxial compressive strength (MPa)	Poisson’s ratio	Elastic modulus (GPa)	Cohesion c (kPa)	Internal friction angle φ (°)
1.9	21.3	0.4	1.5	100	37