Evaluating the Geotechnical Effectiveness of Artificial Sand Cushions in Strengthening Foundation Soils under Saline Ground Conditions

Аbstrаct This study evaluates the geotechnical effectiveness of artificial sand cushions in strengthening the foundation soil of strip footings within the saline ground conditions of Nukus city. The research involves a comparative analysis between the natural state of the soil massif and scenarios utilizing fine, medium, and coarse-grained sand cushions. Numerical simulations were performed using the finite element method (FEM) within the “PLAXIS 3D FOUNDATION” software environment. The modeling process identified the distribution patterns of horizontal and vertical effective stresses, mean stress, mean effective stress, and deviatoric stress throughout the soil massif. The findings indicate that the application of artificial sand cushions leads to a reduction in induced stresses within the soil. Notably, a significant decrease in both horizontal and vertical effective stresses was observed with the use of coarse-grained sand cushions. Conversely, an increase in deviatoric stress values was recorded as the sand grain size increased. The results obtained hold substantial practical significance for enhancing foundation reliability, minimizing settlement, and selecting optimal geotechnical design solutions in regions characterized by saline soils.

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