Effects of homogeneous hydrocarbonic contamination on the bearing capacity of in-situ concrete piles buried in silty sand

摘要

So far, many researches have been done on the effects of hydrocarbon (especially oil) contamination on such soil strength and geotechnical indices as cohesion, angle of internal friction, shear strength, permeability, dry density, and so on. In the present research, effort has been made to model buried concrete piles with known dimensions, and study the effects of the length and diameter ratios (L/L_0 and D/D_0) on their load bearing capacity using the results of previous researches, the values of the geotechnical and strength parameters of oil-contaminated silty sand (SM) specimens, and the PLAXIS 2D Software. Results have shown that with an increase in the percent hydrocarbon contamination, the ultimate load bearing capacity of a pile follows a gradual decreasing trend. Again, an increase in the pile length ratio causes an increase in the load bearing capacity, but one in the diameter ratio causes a decrease in the bearing capacity.