Akademik Veri Yönetim Sistemi
Journal of Polytechnic, cilt.24, sa.3, ss.997-1007, 2021 (ESCI)
In soft soils, soil liquefaction and related ground changes constitute a large part of the damages occurred due to the earthquakes in past years. One of the methods used to prevent the occurrence of these damages is the stone column method whose importance is increasing every day. Despite the studies, the working behaviour of stone columns under dynamic loading continues to be a complex issue. In this study, the performance of stone columns in loose, saturated sandy soils was investigated with a three dimensional finite element model. In the analysis, both pore water pressure ratios and settlement results were compared for soils with and without stone columns. Also a parametric study is carried out to see how changes in stone column parameters affect stone column performance. A three-dimensional two-phase element (u20p8) implemented to ANSYS program to make the usage of hypoplastic material model possible, in order to obtain pore water pressure accumulations that may occur under dynamic loading in saturated soils. It is seen that the model is well suited for the examination of the behaviour of granular soils under repeated loading. In this study, the advantages of using stone columns in saturated granular soils were discussed. This study is useful for the further studies to see the effect of stone column applications in liquefaction susceptible soils.