The construction of an embankment on soft soil with a high groundwater level leads to an increase in pore pressure. As a result of this undrained behaviour, the effective stress remains low and intermediate consolidation periods have to be adopted in order to construct the embankment safely. During consolidation, the excess pore pressures dissipate so that the soil can obtain the necessary shear strength to continue the construction process.
This lesson concerns the construction of a road embankment in which the mechanism described above is analysed in detail. In the analysis three new calculation options are introduced, namely a consolidation analysis, an updated mesh analysis and the calculation of a safety factor by means of a safety analysis (phi/c-reduction).
PLAXIS 2D Tutorial 03: Dry excavation using a tie back wall
PLAXIS 2D Tutorial 04: Dry excavation using a tie back wall - ULS
PLAXIS 2D Tutorial 06: Settlements due to tunnel construction