The uncertainty of the design is a problem that comes out due to the alteration of the soil properties. Depended on the available geotechnical soil properties of Al Najaf city, a study program is prepared to investigate the effect of the alteration of some soil properties, such as unit weight and angle of internal friction, on the design bearing capacity of a bored pile. The soil of the city is suffering from soluble salts, such as gypsum and lime. These salts, by soaking and leaching processes, cause negative alteration of soil properties leads to negative analysis and design of the structures, such as piles for bridges and buildings. The results of the study give a view on the effect of alteration of the mentioned parameters on the design of the pile in addition to the length and diameter of the pile. The most effective parameter was the soil angle of internal friction (F) for different studied parameters.
أ.د. محمد شاكر محمود | Prof. Dr. Mohammed Shakir Mahmood | 11029