Abstract: This paper recommends an uplift capacity formula for bell ended piers in cobblegravel sized materials in the Gobi Desert. The uplift capacity is established based on the influence zone of the soil shear failure plane parameter, n; and the influence zone of the uplift shear failure mode. The axial compressive capacity of the bell ended pier is also recommended. The foundation dimensions of 800 kV transmission lines are optimized using a generic algorithm. The results indicate that an overall cost saving of 25% can be achieved when compared to the recommended method with the code specified formula (n=1.5).

Key words: Gobi Desert, Excavated Bell Ended Piers, Uplift Capability, Axial Compressive Capability, Genetic Algorithm, Cost Benefit