Abstract
To estimate the bearing capacity of the piles during driving, both of the dynamic resistance of the soil against penetration of the pile and the setup factors of the each soils should be determined. In this paper, the method to measure the dynamic resistance of the ground working along the pile shaft and beneath the pile base based on the stress wave theory and so callled re-driving method to determine the setup foctors of soil layers are presented. And the fact that the estimated bearing capacity of the test pile from the dynamic measurement and it determinted by the static loading test are very close is shown in this paper.