Research Article
Investigation of Land Subsidence Based on the Column Element Settlement Model in a Soft-Soil Area
Table 1
Material parameters for different soil layers in the study area.
| | Parameter | Name | Aquifer | Low-permeability layer | Unit | | Unconfined aquifer | Iupper | Ilower | II | III | 1, 2, 3, 4 |
| | Unsaturated density | | 17.0 | 17.5 | 16.0 | 18.0 | 17.0 | 16.0 | kN/m3 | | Saturated density | | 20.0 | 20.0 | 18.5 | 20.0 | 19.5 | 18.0 | kN/m3 | | Horizontal hydraulic conductivity | | 4.0 | 3.5 | 0.1 | 0.05 | 0.008 | 0.0001 | m/d | | Vertical hydraulic conductivity | | 2.0 | 1.75 | 0.05 | 0.025 | 0.004 | 0.00005 | m/d | | Elasticity modulus | | 14.6 | 14.4 | 14.8 | 12.6 | 13.0 | 4.56 | MPa | | Poisson’s ratio | | 0.3 | 0.31 | 0.3 | 0.32 | 0.33 | 0.35 | | | Cohesion | | 8.3 | 8.1 | 8.1 | 4.5 | 11.0 | 25.0 | kPa | | Internal friction angle | | 34.3 | 33.0 | 33.0 | 32.0 | 35.0 | 11.0 | ° | | Dilatancy angle | | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | 0.0 | ° |
|
|
