Research on the Interaction Mechanism between Landslide and Tunnel Engineering

Table 1

Physical and mechanical parameters of stratum around tunnel.

Soil type	Weight	Elastic modulus	Poisson’s ratio	Cohension force	Friction angle
	(kN/m³)	(MPa)		(KPa)	(°)
Silty clay	19	40	0.2	30	20
Gravelly soil 1	20	200	0.2	25	28
Gravelly soil 2	20	250	0.2	30	30
Limestone	27	25000	0.25	1000	55