Study on Stability of Shield Tunnel Excavation Face in Soil-Rock Composite Stratum

Table 3

Table of geotechnical parameters.

Name	Density (kg/m3)	Elastic modulus (MPa)	Poisson’s ratio	Cohesion (kPa)	Internal friction angle (°)
Plain fill	1940	3	0.25	12.6	14.2
Loess-like silty clay	1910	8	0.21	16.4	11.9
Silty clay	1960	5	0.30	19.4	12.9
Moderately weathered marl	2500	2590	0.24	150	32