The Effect of Small Strain Stiffness in Deep Excavation Analyzes

The behavior of deep excavation support systems at soil-structure interaction has been studied by many researchers in recent years. However, studies that considering the rigidity of the small strain of the soil are not very common. For this situation, it can be said that there is not enough number of finite element programs evaluating this effect. Within the scope of this study, analyzes were performed by Plaxis software, is a finite element program, is frequently used to solve geotechnical problems. There are many soil models in the library of the program. Among these, Hardening Soil Model (HS), which is frequently used, and Hardening Soil Small Strain Model (HS_ss), which takes into account the effects of small strain stiffness of this model, were used in this study. Three cases were analyzed with these models. The analysis results were compared with the inlinometer measurements. As a result of the study, model analysis results and in situ measurements are presented comparatively. The HS_ss model was found to be closer to the field measurements than the HS model