نوع مقاله : مقاله پژوهشی
1 گروه آموزشی مهندسی ژئوتکنیک و آب، دانشکده مهندسی عمران، دانشگاه تربیت دبیر شهید رجایی
2 دانش آموخته مهندسی ژئوتکنیک، دانشکده مهندسی عمران، دانشگاه تربیت دبیر شهید رجایی
عنوان مقاله [English]
One of the control criteria in the design of machine foundations is the stress and deformations resulting from the movement of the machine, which must be within the allowable range of materials and safety performance of the machine. In this regard, the use of three-dimensional geocell reinforcement can be very useful, which due to the three-dimensional cell structure with soil confinement, has a very good performance in terms of increasing bearing capacity compared to flat reinforcements. In this research, large-scale modeling of steam turbine under asymmetric loading located on reinforced soil has been studied in real scale, in which geocells with different geometric dimensions and in different levels have been placed. In numerical analysis, FLAC-3D finite difference software is used to evaluate the stress and its deformation. The results of this study show that with increasing the geometry and height of the geocell and also increasing the number of cells per unit area, the stress on the soil decreases and in other words, the bearing capacity increases. Also, increasing the number of geocell layers has some effect on bearing capacity, but has a significant effect on reducing the cyclic amplitude and cumulative strain of the soil under the foundation and the displacement of both foundations The results showed that the appropriate and optimal selection of the number of layers and the distance between them has a significant effect on the performance of machine foundations in asymmetric and asymmetric operating conditions and depends on the safe distance between the two devices.