| The design of pile cap in offshore high pile cap foundation structure mainly depends on the experience of other high pile cap structures such as high-pile wharf and bridges. Based on the current construction, in order to solve the problem that it is easy to design thick caps and redundant reinforcement during design. The fine numerical simulation of the whole fan foundation including soil mass is carried out by finite element method. The calculation results are compared with the standard algorithm. The safety margin of the standard algorithm in the design of the cap is obtained, and the direction of reinforcement optimization is proposed. The results show that: Based on the calculation result of elastic material model, the finite element calculation result is smaller than that of the standard algorithm. The maximum pressure difference of foundation pile is 22.43%, and the maximum pulling force difference is 2.08%. The maximum difference of bearing moment is 57.89% and the minimum is 18.85%. Based on the calculation results of the elastic-plastic material model, the maximum stress of the steel bar appears at the head of the steel pipe pile, and the stress of the steel bar at the top of the cap is small. In the design of cap foundation, the reinforcement near the head of steel pipe pile can be strengthened and the number of steel bars on top of cap can be reduced. |
