Three-Dimensional Finite Difference Analysis on the Ground-Sequential Tunneling-Superstructure Interaction

Table 1

Geotechnical and geomechanical properties of the material [30].

Parameter	Index	Unit	First layer	Second layer	Third layer
Coefficient of lateral soil pressure		—	0.65	0.85	0.58
Density			1850	2000	2000
Friction angle			23	20	25
Cohesion			18	20	60
Young’s modulus			10	15	60
Poisson’s ratio		—	0.4	0.3	0.3