Behavior of Passive Pile Foundation in Clayey Soil contaminated with Fuel Oil

摘要

This study highlights the impacts of Medium Fuel Oil (MFO) on the behavior of passive pile foundation constructed in clayey soil. The pile foundation is loaded axially and subjected to the movement of soil resulting from the construction of a nearby embankment. The intact soil sample is classified as lean clay of low plasticity (CL). The soil samples were synthetically contaminated with two percentages of MFO, 10 and 20% according to the dry weight of the soil. The soil samples were mixed with the contaminant (MFO) manually and left for 4 days for homogeneity. The effects of an adjacent embankment on the behavior are investigated by measuring the strains along the pile shaft. An incremental surcharge was applied at distances of 5D and 10D from the edge of the pile model, where D is the model pile diameter. The main results obtained from the physical model of pile tests are vertical and horizontal displacements at the soil surface and strains along the pile shaft. Finite difference method is used to calculate the rotation of pile, pile deflection, shear force, and soil reaction from the bending moment calculated from strains. Based on the results of the tests, it was concluded that increasing the percentage of MFO in the soil causes increasing the effects of adjacent embankment load on the response of the passive pile. Also, increasing the distance between the pile and the edge of embankment decreases the effects of embankment loading on the behavior of pile.