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Three-dimensional finite element modelling in piled raft foundation design

Songür, Sinem
This thesis is about optimization of load sharing between piles and raft. Starting with comparison of two pile models named volume pile and embedded pile in a finite element software, verification with an existing building was made. In the next part of the thesis, optimization on pile configuration, pile length, soil type and soil models are presented. Based on the results, it can be concluded that as spacing over diameter ratio increases, settlement reduction ratio also increases and piled raft coefficient, which is ratio of the axial load on piles over total load, decreases. Moreover, increase in single and total pile lengths also increases the piled raft coefficient, whereas it decreases settlement reduction ratio. Lastly, it is implied that a value of “80” for “total length of piles / length of single pile” leads to optimum conditions for all cases analyzed in this study.