Table 4.

Physical and mechanical parameters of soils.

Soil layer	Soil thickness /(m)	/(kN·m−3)	/MPa	/MPa	/MPa	/MPa	/10−3
Miscellaneous fill	3	18	3.5	3.5	10.5	35	0.4
Fine sand	6	20	5.5	5.5	16.5	55	0.4
Silty clay	10.5	20	2.6	2.6	7.8	26	0.4
Medium sand	1.5	21	6.0	6.0	18	60	0.4
Fully weathered granite	5	21	40	40	120	400	0.4
Granular strongly weathered granite	14	20	60	60	180	600	0.4

Note: represents the natural element weight of the soil; is the reference stiffness modulus at the reference confining pressure , where = 100 kPa; is the tangent compression modulus at the reference confinement; indicates the unloaded and reloaded modulus at the reference confinement; is the initial small-strain shear modulus; and represents the strain level at which the secant modulus, , decreases to 70% of 70%.