Abstract
In this study, the performances of the sand piles in Istanbul's Bağcılar and Zeytinburnu districts has been analyzed using Finite Element Method (FEM). Single and group (triple) piles with various length/diameter ratios (L/D) were placed in the water-saturated soft clay soil. Sand piles were modeled in various L/D ratios (10, 5.71, and 8.57). The distance between the piles was chosen as 2 meters and the group effect was also investigated. A uniformly distributed load of 162 kN/m2 is placed on the ground. In addition, the soil was modeled with the Soft-Soil soil model, the hardening soil model for the infill part, and the sand piles with the Mohr-Coulomb soil model. According to the results , the settlement of the soil decreases by 52.8% for a single pile with an L/D ratio of 8.57. However, the best L/D ratio for triple piles was found to be 5.71. In this case, the settlement decreases by 52.8% compared to the pileless situation. Finally it was concluded that the model with the L/D ratio of 8.57 reduced settlement in the best and the most efficient way.
Highlights
Clayey soils tend to settle excessively due to their lowstrength and high compressibility
There are studies conducted by placing sand piles in clayey soil, using finite element analysis methods and small scale experiments
Hasan and Samadhiya [3], conducted experimental model tests to investigate the behavior of piles under short-term loading in order to increase the load bearing capacity and reduce settlements in soft clay soils
Summary
Clayey soils tend to settle excessively due to their lowstrength and high compressibility. Hasan and Samadhiya [3], conducted experimental model tests to investigate the behavior of piles under short-term loading in order to increase the load bearing capacity and reduce settlements in soft clay soils. Hasan and Samadhiya [4], Study conducted experiments to examine the swelling effect of the sandy piles As a result of laboratory experiments, load settlement behavior was obtained for sand piles. The results show that the maximum strength is at L/D=4 and as the L/D ratio increases, the loading capacity decreases due to soil swelling.The purpose of Safin [7], in his 2020's study, is to evaluate the deformation of a group of sand piles under load in a saturated clayey soil. A single pile and a triple group piles were selected and loaded with a uniformly distributed load of 162 kN/m2
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