Akademik Veri Yönetim Sistemi
14th Congress of the International-Association-for-Engineering-Geology-and-the-Environment (IAEG), Chengdu, Çin, 21 - 27 Eylül 2023, ss.529-542, (Tam Metin Bildiri)
In this study, the ground improvement application that applied to the foundation of a private hospital in Amasya, Turkey was investigated as a case study. The soil profile is mainly composed of silt-sand interbedded clay and under gravelly silty sand units in the study area. As a soil improvement method, the Deep Soil Mixing (DSM) technique based on the principle of simultaneous mixing the ground while injecting with cementitious, was selected. This technique is increasingly being used worldwide because of the advantages such as the variety of soil conditions that the technique can be applied, application speed, and the application's depth. The bearing capacity of DSM columns was confirmed through five in-situ axial loading tests. In addition, core samples were taken from the DSM columns and the compressive strength tests were performed in the laboratory. For both types of tests, the results were about 25% higher than the desired values. It means that DSM columns were applied successfully. As an aim of this study, the axial load test was modelled both in Plaxis 2D and Plaxis 3D to compare their results with each other based on field data. Soil parameters that were used in numerical modelling were calibrated based on field data. This study shows us the overall physical behaviour of the soil profile can be predicted with acceptable accuracy through numerical modelling software. On the other hand, it has been observed that Plaxis 3D show more effective performance than Plaxis 2D to predict displacements.