Using plaxis for slab foundation calculation on undermined territories

Purpose. Slab foundation calculation problem (for example round slab foundation) on the undermined territories is difficult and we need to get analysis and inventory a huge amount of factors for receiving satisfactory solution. The guidelines show us solution of this problem with linear form. It`s describing occurred processes approximately. Numerical methods application (for example finite elements method) can remove this disadvantage. In this case, huge amount of factors need to use computer technologies for calculation rationalization. Comparison of the contact tensions calculation results (linear calculation and calculation with PLAXIS) on round foundation slab base with radial bended ground base on undermined territories was our aim. Methodology. For this task execution we defined calculated values of contact tensions on round slab foundation base of tower-type building with radial bend I÷IV groups. Calculation was made for different type of deformation: a) convexity curvatures and full contact of foundation base with soil; b) concavity curvatures and full contact of foundation base with soil; c) convexity curvatures and not full contact of foundation base with soil; d) concavity curvatures and not full contact of foundation base with soil. Deformation radius varied from 1 to 15 km. Round foundation slab designed as rigid. Originality. Comparison of two calculation can show us that the calculation with using PLAXIS gives us lower unfavorable contact tensions (12…19 % lower than linear solution) and aligned diagrams (non-contact zone is absent). Practical value. PLAXIS using for round foundation calculation in case of undermined territories allow modeling round foundation slab interaction with non-uniform deformated base more qualitative.