The impacts of soil contamination on the behavior of pile group driven into clayey soils and subjected to a combination of axial static and lateral cyclic loads have been investigated in this research. Mechanical model was prepared in order to study the behavior of pile group, 2×2. Tests were performed on a free headed pile with a ratio of eccentricity to embedded length (e/L) of 0. 334. The piles are embedded in intact and synthetically contaminated soils. The intact clayey soil samples were contaminated synthetically with industrial wastewater of 10%, 20%, 40%, and 100% from the weight of water used in the soaking process of soil samples, which continued for 30 days. It was observed that different percentages of contaminants have significant effects on the vertical and lateral displacements of the pile group. It was concluded that, the vertical displacement of piles cap increased by 5.5% to 26.6% as the percentage of contamination increased, while the lateral resistance of the pile group decreased by 5.9% to 23.5% with increasing the concentration of contamination. Furthermore, the ratio of permanent displacement to the total displacement varied by 29% to 33% as the percentage of contamination in the soil increased. The efficiency of pile group ranged between 85% and 96%.
展开▼
