Numerical Study and Field Monitoring of the Ground Deformation Induced by Large Slurry Shield Tunnelling in Sandy Cobble Ground

Table 2

Physicomechanical parameters of surrounding rock and tunnel segment.

Depth z (m)	Elastic modulus E (MPa)	Poisson’s ratio μ (−)	Unit weight γ (kN·m^−3)	Cohesion c (kPa)	Internal friction angle φ (°)	Thickness t (m)
0–6	10	0.4	18	10	20	—
6–20	30	0.35	19	25	27	—
20–40	80	0.28	20	40	35	—
40–60	100	0.26	21	50	38	—
Tunnel segment	33.5 × 10^3	0.2	25	—	—	0.55