Study on soil fatigue effect in the drivability analysis for foundation piles of offshore oil platform

In the drivability analysis design of foundation piles of offshore oil platform, it needs a comprehensive consideration of soil fatigue surrounding the pile. Engineering practice repeatedly indicates that the currently widely used calculation method for soil fatigue effect is not adapted to the drivability analysis. Calculation method for soil fatigue should be different between clay and dense sand. Based on the current nonlinear calculation method for soil fatigue, a new approach for soil fatigue calculating is put forward, in which a strength compensatory approach for dense sand has been considered. This approach has been applied to some practical engineering projects successfully, which may give more reasonable results than the currently used method.