Processing of engineering and geological survey data for determining parameters of the hardening soil model on the example of clay soils in the Nizhny Novgorod region

Introduction. The paper examines the key aspects of obtaining parameters for the hardening soil model used in the analysis of soil bases. This model is increasingly popular due to its effectiveness in calculating various structures, such as pile foundations, retaining walls, and anchorages. Aim. To analyze the experience of obtaining parameters for the hardening soil model based on laboratory data derived from engineering and geological surveys. Materials and methods. The methodology involved analyzing and processing the results of laboratory studies on soils in the Nizhny Novgorod region. The laboratory tests were performed as part of engineering surveys. The parameters were optimized and the model was calibrated for the obtained parameters of the hardening soil model using the Plaxis software suite, specifically within the Soil Test module. Results. A set of design parameters was obtained for the hardening soil model. A comparison between laboratory results and numerical modeling outcomes was performed to confirm the accuracy and reliability of these parameters. This stage of the study demonstrated that the optimized and calibrated parameters of the hardening soil model provide a high degree of consistency between laboratory data and numerical calculations. Conclusions. Currently, no universally accepted methodology exists for processing the results of laboratory tests and statistical analysis. Overall, the analysis of results and parameter selection for implementing the calculation model remains at an expert level and is not regulated by normative documents. Further research in this area will enable the development of more effective methods and approaches, contributing to advancements in both science and practice in geotechnical engineering.