Influence of Base Rock Deterioration on Tunnel Bottom Structure Damage under Train Excitation

Table 7

Physical and mechanical parameters of surrounding rock.

Surrounding rock grade	Element	Elastic modulus (GPa)	Poisson ratio	Gravity (kN/m^3)	Cohesion (MPa)	Friction angle (°)
III	SOLID45	13	0.27	24	1.1	65
IV	SOLID45	3.6	0.33	21.5	0.45	55
V	SOLID45	1.5	0.4	18.5	0.125	45