Numerical modelling of stone columns installation in clay
Numerical modelling of stone columns installation in clay
Installation effects of stone columns in purely cohesive soils are analysed using a Coupled Eulerian Lagrangian formulation in three-dimensions (3D). The installation process is simplified to the inclusion of rigid cylindrical elements with conical tips pushed into a single homogeneous soil layer with constant undrained shear strength. Dynamic effects, gravel placement and dissipation of excess pore pressures are not modelled. Tresca plasticity and a quasi-incompressible elastic law are used in the analyses. Installation of one single column, two columns and a group of nine columns are simulated to study the interaction between them. Results show the increase in radial stresses and pore pressures in the area close to the column, where the soil has been affected. When more than one column is modelled, the installation effects interact between each other, producing slightly higher radial stresses and pore pressures in a larger area. The peak of radial stresses appears a bit further away from the column in these cases
Marina Miranda; Atefe Geramian; Jorge Castro; M. Ghazavi
10th European Conference on Numerical Methods in Geotechnical Engineering (NUMGE2023)
11. Reinforcements and ground improvement
https://doi.org/10.53243/NUMGE2023-118
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