Influence of Water Inrush from Excavation Surface on the Stress and Deformation of Tunnel-Forming Structure at the Launching-Arrival Stage of Subway Shield

Table 2

Basic parameters of soil mass in the launching-arrival stage of shield tunneling in the XW interval.

Name of soil layers	Compressive modulus (kPa)	Elastic modulus (kPa)	Poisson ratio	Cohesion (kPa)	Internal friction angle (°)	Void ratio	Saturation density (kN/m^3)	Permeability coeffcient (m/s)
Miscellaneous fill 1-1	1500	879	0.36	8	18	0.69	18.5
Silty clay 10-1	24300	19215	0.28	65	29	0.67	19.7
Silty clay 10-1a	46000	8072	0.31	36	10	0.66	19.5
Silt fine sand 11-1	40900	19039	0.29	16	24	0.43	19.7
Strongly weathered mudstone 18c-1	45000	81940	0.3	48	30	0.35	21
Mudstone 20a-2	500000	371429	0.3	50	19	0.30	22.5