Influence of Grouting Interruption on Mechanical Performance of Offshore Wind Turbine Jacket Foundation Connection

Offshore working environment is complex and variable, and sometimes the grouting pipe is blocked and cannot be continued in the offshore wind power jacket foundation. In this paper, the effect of grouting interruption on the mechanical performance of jacket foundation connection was analyzed by numerical simulation. Firstly, a finite element analysis model for the axial force behavior of grouting connection was established, and the validity was verified by existing experiments. Then three different simulation methods of grouting interruption were compared and analyzed. Moreover, the parameters of grouting break position, shear key height, shear key spacing, the thickness of grouting body and the number of shear key were analyzed. Based on the analysis results, a calculation method of bearing capacity for rapid assessment of the grouting interruption was established.