Bayesian Approach for Sequential Probabilistic Back Analysis of Uncertain Geomechanical Parameters and Reliability Updating of Tunneling-Induced Ground Settlements

Table 2

Geomechanical parameters for different soil layers.

Soil layers	Density (kg/m^3)	Young’s modulus (MPa)	Poisson’s ratio	Cohesion (kPa)	Friction angle (°)
Plain fill	1813	15	0.42	5	10
Silty clay	1933	15	0.35	44.7	19.3
Fine sand	1913	16	0.4	1	30
Gravel	1893	28	0.39	1	36
Highly weathered silty mudstone	2050	120	0.3	60	37
Moderately weathered silty mudstone	2390	450	0.39	120	32