Abstract
It is very important that the soil properties of the ground where the friction piles may be placed are sufficiently affect the bearing capacities of the piles. However, for the case of the widely expanding structures such as the piers of the viaduct, it is not practical from the economical reason that the soil explorations are implemented in every points. Using the limited information based upon the soil exploration, conventional method may not accurately clarify the soil properties due to their large uncertainties. This paper proposes the probabilistic method to deal with the N-value as the random variable accounting for its spatial variation and estimates the bearing capacities for the pile foundations of the Ogori viaduct in the Kyushu expressway.
