A series of static piling tests and SPTs were performed to investigate the behavior of jacked piles. The study focuses on the changing law of pile toe resistance and shaft resistance in different soil strata. Then an empirical formula is put forward to calculate the jacking resistance and a visual computer program is worked out. Two calculation engineering examples indicated that the method is feasible. The calculated jacking force satisfies the engineering precision requirement. It can be concluded that the method is convenient to judge driveability of pile

estimate the bearing capacity of pile and select the jacked piling equipment. The study is significant because the SPT data is commonly used can be easily obtained.