Subway Tunnel Construction Settlement Analysis Based on the Combination of Numerical Simulation and Neural Network

Table 2

Model plate unit material properties.

Name of the material	Natural density (g/cm³)	Compression modulus (MPa)	Angle of internal friction (°)	Cohesion (kPa)	Poisson’s ratio
Shield shell (70 mm thickness)	7.72	210,000	50.00	20,000	0.28
C50 concrete segment (300 mm thickness)	2.49	35,000	62.63	4,241	0.16
Shield tail void medium (grouting material)	1.63	0.94	10.00	1.12	0.45