Parametric Sensitivity Study of Deep Excavation in Singapore Old Alluvium Formation

Table 2

HS soil parameters based on the back analysis of similar geotechnical conditions [15].

Soil type	Model	γ (kN/m)	Poisson’s ratio ()	E50,ref (kN/m^2)	Eode,ref (kN/m^2)	Eur,ref (kN/m^2)	cref (kN/m^2)/Cu (kN/m^2)	Φ(°)	Power m
Fill	Drained	20	0.15	1000	1300	3000	0.1	25	0.5
Marine clay	Undrained	16	0.2	3740	3740	11220	18.7	0	0
OA	Undrained	20	0.2	1.4e^5	1.4e^5	4.3e^5	250	0	0

Notes: E_50,ref, effective secant modulus (50% stress level) at confining pressure of 100 kPa; E_ode,ref, effective 1D compression modulus at a vertical stress of 100 kPa; E_ur,ref, effective unloading-reloading modulus at a confining pressure of 100 kPa; m, modulus exponent controlling the stress dependency of the modulus.