Experimental Study on Characteristics of Seismic Damage and Damping Technology of Absorbing Joint of Tunnel Crossing Interface of Soft and Hard Rock

Table 1

Mechanical parameters of stratum.

Property of rock	Density (g·cm^−3)	Cohesion (kPa)	Friction angle (°)	Modulus of elasticity (MPa)	Poisson’s ratio
Gravel	1.85～2.05	87～126	19.8～30.5	212～438	0.24～0.33
Sandstone	1.98～2.26	205～267	25.7～37.8	2 886～6 484	0.19～0.21