Dynamic Responses of a Twin-Tunnel Subjected to Moving Loads in a Saturated Half-Space

Table 2

Parameters of the liner, the saturated ground, and the moving load.

Saturated Soil Ground	Width a (m)	Height b (m)	Length l (m)	Biot parameters
	42	24	120	0.99
	Spacing (m)	Burying depth h (m)	Porosity	Poisson’s ratio
	9–24	6–18	0.286	0.4
	Young’s modulus	Darcy permeability coefficient	Shear wave velocity	Biot parameters
	(Pa)	(m/s)	(m/s)	(N/m)
	2.23 × 10^8	1.0 × 10^−5–1.0 × 10^−2	191.1	5.74 × 10^9
	Density of the bulk material (kg/m^3)		Density of the pore fluid (kg/m^3)
	2.178 × 10^3		1.0 × 10^3
Concrete Liner	Young’s modulus	Poisson’s ratio	Density of the bulk material	outer radius	Thickness
	(Pa)		(kg/m^3)	r(m)	t(m)
	2.50 × 10^10	0.2	2.400 × 10^3	3.0	0.3
Moving Load	Point load value (N)		Load velocity (m/s)
	2.0 × 10^4		19.11–191.1