Analysis of Surrounding Rock Pressure of Deep Buried Tunnel considering the Influence of Seepage

Table 1

Mechanical parameters of surrounding rock of the example project.

Mechanical parameters	Value	Mechanical parameters	Value
Elastic modulus (Gpa)	7.8	Crustal stress	22
Strength attenuation modulus (GPa)	7.8	External water pressure	6
Peak internal friction angle (°)	35	Density (g·cm^-3)	2.6
Residual internal friction angle (°)	30	Poisson’s ratio μ	0.25
Peak cohesion (MPa)	1.5	Dilatancy angle (°)	10
Residual cohesion (MPa)	0.9	Critical plastic softening coefficient	0.007