Effect of Deficiencies in the Tunnel Crown Thickness on Pressure Tunnels with Posttensioned Concrete Linings

Table 1

Material properties.

Part	Material	Elasticity modulus, E (MPa)	Poisson’s ratio, ν	Unit weight, γ (KN·m^−3)
PTCL	C40 concrete	3.25 × 10^4	0.167	24.5
Segmental lining	C50 concrete	3.45 × 10^4	0.167	25
Membrane	Composite material	1.5	0.3	—
Anchor cable	Steel	1.95 × 10^5	0.3	78.5
Reinforcing bar	Steel	2.0 × 10^5	0.3	80