Abstract: Pile foundation driveability analysis is very important for pile design. In actual projects, precise pile driveability analyses would prevent the pile from being cut off or damaged when the pile couldn’t drive into the given depth, and could also keep pile bearing capacity not less than design capacity when penetration depth is deeper than the design depth. In order to analyze the pile foundation driveability accurately, this paper studies the sensitive factors which could affect pile foundation driveability analysis. 32 experiments are designed with orthogonal experiment and completed by GRLWEAP; the pile driving analysis results are obtained afterwards. Through the case study of Bohai sea oil field platform project, same conclusions can be drawn on the sensitivity regularity of pile foundation driveability influencing factors. The sensitivity of the factors that influencing pile foundation drivability from large to small is in this particular order: piling energy, geological conditions, pile diameter, pile length, cushion thickness, pile wall thickness, stop-driving time, stop-driving location and the pile section numbers.

Key words: pile foundation, driveability, influencing factors, GRLWEAP soft, sensitivity