الفهرس 
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Abstract
This research present a series of comparative study for the load-settlement behavior of single large diameter bored piles. Three international codes in addition to the Egyptian code (ECP 202) namely: DIN 4014, AASHTO, and the French code are considered. the ultimate bearing capacities are predicted by those codes for 38 pile case studies located in the nile delta and port said regions in Egypt. The predictions for the mentioned codes are evaluated by the modified chin (1970) method. A statistical analysis was performed on the total pile loads, and both tip- and skin resistance individually to evaluate the predictions of each code accurately. Based on the code prediction of the ultimate pile load, a proposed load-settlement model is presented . this model simplifies the analysis of piled-raft as it can easily predict the pile self-settlement. The study assured that the pile load test is an irreplaceable process to estimate the ultimate pile capacity.