Mechanical Response and Parametric Sensitivity Analyses of a Drainage Pipe under Multiphysical Coupling Conditions

Table 5

Physical and mechanical properties of materials of the basic case.

Parameter	Unit	Value
Subgrade (dry)
Density, ρ	kg·m^−3	1850
Elastic modulus, E	MPa	15.0
Poisson’s ration, υ	—	0.25
Friction angle, φ	°	20.0
Damping, α	—	0.32
Subgrade (saturated)
Density, ρd	kg·m^−3	1400
Elastic modulus, E	MPa	15.0
Poisson’s ration, υ	—	0.3
Friction angle, φ	°	15.0
Damping, α	—	0.32
Permeability coefficient, k	m/s	1e − 07
Void ratio, e	—	1.2
Backfill
Density, ρ	kg·m^−3	2000
Elastic modulus, E	MPa	20.0
Poisson’s ration, υ	—	0.25
Friction angle, φ	°	20.0
Damping, α	—	0.34
Void ratio, e	—	0.5
Permeability coefficient, k	m/s	1e − 08
Bedding
Density, ρ	kg·m^−3	2400
Elastic modulus, E	MPa	200.0
Poisson’s ration, υ	—	0.2
Friction angle, φ	°	30.0
Damping, α	—	0.20
Void ratio, e	—	0.6
Permeability coefficient, k	m/s	1e − 06
Gasket
Elastic modulus, E	MPa	4.00
Poisson’s ration, υ	—	0.40
Concrete
Elastic modulus, E	MPa	30000
Poisson’s ratio, υ	—	0.20
Density, ρ	kg·m^−3	2400
Permeability coefficient, k	m/s	1e − 12
Void ratio, e	—	0.01
Dilation angle, ψ	°	30.0
Flow potential eccentricity, e	—	0.10
Viscosity parameter, μ	—	0.005