The Deformation Characteristics of Weak Foundation with High Back Siltation in the Immersed Tunnel

Table 4

Soil layer parameters.

Soil	Poisson’s ratio	Cohesive force (kPa)	Internal friction angle (°)	Buoyant density (kg·m^−3)	Compression modulus (MPa)	Resilient modulus (MPa)	Recompression modulus (MPa)
Silt	0.430	7.2	19.9	680	—	—	—
Clay	0.400	60	28.8	760	24	—	—
Silty clay	0.400	54	30.0	840	23.69	159.96	84.98
Clay grit	0.296	50	18.5	870	25.54	145.69	97.73
Medium sand	0.296	20	37.8	1030	34.26	198.77	82.36
Coarse sand	0.290	18	38.3	1100	40.8	236.6	80.71