This paper shows the revise of the equations and the evaluation of the accuracy to estimate the axial bearing capacities of piles. Firstly, the estimation equations on the axial bearing capacities of piles are improved by analysis of pile load test results. Secondly, the ratio of the axial bearing capacities estimated by improved the equations to actual values are compared with the one estimated by the former equations. Finally, the accuracy to estimate the axial bearing capacities of piles by improved the estimation equations are evaluated.
