Risk Analysis of Tunnel Construction Scheme Change based on Field Monitoring and Numerical Analysis

Table 1

Material parameters of the model.

Material	E (MPa)	μ	γ (kN·m^3)	C (MPa)	Φ (°)
Miscellaneous fill	15	0.39	15.7	0.01	12
Loess-like soil	29	0.30	17.8	0.017	21
The pebble	250	0.22	21	0	20
Sandstone	57.5	0.24	21.2	0.03	25
Advance catheter	20 × 10^4	0.25	78.5	0.2	25
Big pipe shed	18 × 10^4	0.25	78.5	—	—
Concrete primary support	1 × 10^4	0.25	25	—	—
Secondary lining	3 × 10^4	0.20	25	—	—