Study on the Applicability of an Improved Pile-Beam-Arch Method of Metro Station Construction in the Upper-Soft and Lower-Hard Stratum

Table 1

Material properties.

Material	μ	γ (kN·m^−3)	E (MPa)	c (kPa)	φ (°)
Filled soil	0.40	17.0	13	10	15
Silty clay	0.35	20.3	42	47	17
Strongly weathered slate	0.28	22.0	180	60	30
Moderately weathered slate	0.23	27.0	1200	170	38
Primary lining	0.20	23.0	25000	—	—
Secondary lining	0.20	25.0	28000	—	—
Side pile	0.25	30.0	30000	—	—