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Numerical Study of Bearing Capacity of Shallow Foundations on Two-Layer Soils

Fathi Mehmandoost Sofla, Mahdi | 2022

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 55308 (09)
  4. University: Sharif University of Technology
  5. Department: Civil Engineering
  6. Advisor(s): Ahmadi, Mohammad Mahdi
  7. Abstract:
  8. The purpose of designing the foundation is to transfer the load of the structure to the subsoil without creating shear failure and additional settlement in the soil. Therefore, choosing the appropriate bearing capacity is an important point that should be considered in any project. Determining the bearing capacity of foundations is one of the topics that has long been considered by researchers and geotechnical engineering designers. For this reason, its design is not considered a new issue, but the application of new methods and the development of computers, raises new perspectives on this issue that justifies new studies.Most of the recent study, which have done so far on bearing capacity, has been for homogeneous soils but in reality the soil profile is not homogeneous and consists of several layers. In this study, FLAC2d software was used to determine the ultimate bearing capacity of strip foundations located in two-layer soils by using finite difference method. In many soils profile, the soft soil layer is located at a small depth from the subsurface soil profile. Large and sensitive structures that require soil with high bearing capacity can not be placed on these weak soils. One way to solve this problem is to place the foundation in the embedded depth. Most of the focus of this research is on the effect of embedded depth on the bearing capacity of strip foundations on two-layer soils. In this research, the parameters affecting the ultimate bearing capacity of strip foundations are investigated by using finite difference method. According to the results of this research, practical relationships are presented to determine the ultimate bearing capacity of strip foundations on two-layer soils.

  9. Keywords:
  10. Bearing Capacity ; Finite Difference Method ; Soil Layers ; FLAC2d Software ; Embedded Foundation ; Embedded Depth

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