Stability Analysis of Neighborhood Tunnels with Large Section Constructed in Steeply Jointed Rock Mass

Table 1

The physical and mechanical parameters of intact rock.

Material	Unit weight (kN/m^3)	Friction angle (°)	cohesion (MPa)	Elastic modulus (GPa)	Poisson ratio
Filled soil	20.5	28	0.028	0.5	0.45
Sandstone	24.9	41.5	2	3.4	0.15
Sandy mudstone	25.6	32.5	0.6	1.1	0.39