Ultimate Lateral Load Capacity of Piles in Soils Contaminated with Industrial Wastewater

The present study devoted to determine the ultimate lateral carrying capacity of piles foundation in contaminated clayeysoils and subjected to lateral cyclical loading. Two methods have been used to calculate the lateral carrying capacity ofpiles foundation; the first one is two-line slopes intersection method (TLSI) and the second method is a modified model ofsoil degradation. The model proposed by Heerama and then developed by Smith has been modified to take intoconsideration the effects of heavy loads and soil contamination. The ultimate lateral carrying capacity of single pile andpiles group (2×2) driven into samples of contaminated clayey soils have been calculated by using the two methods. Clayeysoil samples are contaminated with four percentages of industrial wastewater (10, 20, 40 and 100) % of the distilled waterused in the soaking process, the soaking procedure of soil samples have been proceeded for 30 days. Also, two ratios ofeccentricity to embedded length (e/L = 0.25 and 0.5) have been examined. The results obtained from two analyticalmethods are well agreed with those obtained experimentally. The ultimate lateral carrying capacity, Pu (analytical) /Pu(experimentally) ranged from (75-8) % and (77-80) % of single pile with e/L = 0.25 and 0.5 respectively. In the piles groupthe ratio ranged (67-80) % and (71-79) % for e/L = 0.25 and 0.5 respectively.