Abstract
The behavior of single piles driven into contaminated clayey soil samples subjected to a combination of static axial and cyclic lateral loadings have been studied in this research. A laboratory model was manufactured especially for studying such behavior. A solid circular cross sectional area pile of diameter 19 mm and made from aluminum, the pile was embedded into the soil with an eccentricity to embedded length (e/L) ratio of 0.334. The intact soil samples and industrial wastewater were obtained from the center of Iraq. The industrial wastewater is a byproduct disposed from Musayib thermal electric power plant. The intact clayey soil samples were synthetically contaminated with four percentages of 10, 20, 40 and 100% from the weight of water used in the soaking process which continued for a period of 30 days. The different percentages of contaminant concentrations have significant effects on the lateral load-displacement relation of the piles subjected to a combination of axial and lateral loadings. The vertical displacement under the same vertical load increased by 5–95%, the axial strength of piles decreased by 10–34% and the lateral-bearing capacity of the piles decreased by 10–34% with increasing the percentage of contamination from 10 to 100%. The ratio of permanent lateral displacement to the total lateral displacement was increased by 23–27% when the concentration of contaminant increased by 10-100%. Generally, the application of axial loading increases the lateral-bearing capacity of piles, and reduces the total lateral displacement.
Highlights
Soil contamination can be defined as the sum of all factors that deteriorate the quality, texture and mineral content of the soil [1]
The impacts of industrial wastewater on the performance of single pile foundation driven in contaminated clayey soil under a combination of static axial load and lateral cyclical loads has been investigated experimentally, where several ratios of contaminant mixed with soil synthetically
Industrial wastewater has diverse effects on the lateral carrying capacity of piles subjected to lateral cyclical loading
Summary
Soil contamination can be defined as the sum of all factors that deteriorate the quality, texture and mineral content of the soil [1]. Haigh and Bolton [10] studied the response of a large-diameter single-pile under one-way force of cyclical lateral loads. They discussed the accumulated pile shaft horizontal displacement caused by the permanent cyclical lateral displacement, and the effects of lateral loads on the pile cyclical lateral secant stiffness. Basack [9] studied the response of 2×2 piles group subjected to horizontal cyclical load in soft clay. The impacts of industrial wastewater on the performance of single pile foundation driven in contaminated clayey soil under a combination of static axial load and lateral cyclical loads has been investigated experimentally, where several ratios of contaminant mixed with soil synthetically.
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