Numerical simulation of the experiment on testing a group of piles using different models of soil base

In the paper, influence of selected model soil environment on stress-strain state (SSS) pile foundation is studied. The following issue sare considered: 1) analysis main models environment, widely used in modeling interaction foundations with foundations; 2) Numerical "base – foundation" system was performed using form of: variable stiffness coefficients, volume tricelastic and elastic-plastic elements mass; 3) a comparison SSS obtained by numerical modelingusing various verification results comparing data field experiment testing group piles given. This study based experiments full-scale piles, conducted prof. Bartolomey A.A. colleagues. experiment, groupof 9 length 5 m section 30x30 cm driven into ground. were combined reinforced concrete grillage. - pilefoundation" carried out SP "Lira SAPR 2019".
 It revealed that calculated values longitud alforces modeled rod elements, base factors simulated variables give good convergence experimental studies. error for all fields wide range loads up to 20%. When determining value it necessary refine miteratively more than 3 times. disadvantage difficulty obtaining correct bending moments piles. volumetric elastic finite longitudinal forces 45%, use increases accuracy calculation. After actual ettlement, we observe an excellent correlation variant Mohr-Coulomb strength criterion. within 0.8 ... 2%. massif leads under estimation settlement 8%. also estimates 15%.