Mechanical Behavior of the Special Segment Structure during Upward Shield Tunnel Construction

Table 3

Various material parameters.

Material	Poisson’s ratio	Elastic modulus (MPa)	Bulk density (kN/m^3)
Soil	0.3	3 × 10^4	19
Special segment	0.28	3.25 × 10^7	25
Ordinary segment	0.2	3.45 × 10^7	25
Steel	0.3	2.06 × 10^8	78.5