Geosynthetic-reinforced and jet-grout column-supported embankments on soft soils
DOI:
https://doi.org/10.14195/2184-8394_115_5Keywords:
Soft soils, Embankments, Jet grout columns, Geosynthetics, Numerical modellingAbstract
Using a numerical model based on the finite element method, the behaviour of a geosynthetic reinforced and column-supported embankment on soft soils is analysed. The unit cell formulation is used, which consists of one jet grout column and the soft soil, geosynthetic and embankment fill from its influence area, with confined axisymmetric behaviour. The numerical model incorporates the Biot consolidation theory (coupled formulation of the flow and equilibrium equations) with constitutive relations simulated by the p-q θ critical state model. Special emphasis is given to the analysis, during and after the construction period, of the settlements, excess pore pressures, effective stresses, stress levels, tension in the geosynthetic, arching effect, stress concentration ratio and reinforcement efficiency coefficient.
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