An Investigation on the Influences of Construction Schemes on Backfilling the River-Crossing Section of a Utility Tunnel

Table 2

Basic physical and mechanical parameters of the materials.

Materials	Density (kg/m^3)	Young’s modulus (kPa)	Poisson’s ratio	Cohesion (kPa)	Internal friction angle (°)
Soil	1.49	12000	0.30	21.5	20
Grouted soil	1.59	21600	0.32	28	26
Concrete	2.35	31500000	0.2	—	—