Construction method for reinforcing and repairing steel pipe pile for offshore wind power

A construction method for reinforcing and repairing a steel pipe pile for offshore wind power, the construction method comprising the following steps:

• step S1:
• installing a plurality of support ribs on an outer wall of a steel pipe pile to be repaired along a circumferential direction, wherein the support ribs are fixed to the outer wall of the steel pipe pile by welding;
• and, magnetic stick pieces are fixed to the support ribs and attached to the outer wall of the steel pipe pile, such that the support ribs are pre-positioned, and that the support ribs are welded;
• step S2:
• placing a plurality of support plate components on the support ribs and connecting the plurality of support plate components along the outer wall of the steel pipe pile to form an annular support plate assembly;
• step S3:
• installing a plurality of hoop cylinder components on the support plate assembly, connecting the plurality of hoop cylinder components along the outer wall of the steel pipe pile to form an annular hoop cylinder assembly, and forming a grouting cavity between the hoop cylinder assembly and the steel pipe pile;
• step S4:
• connecting grouting pipelines to grouting ports of the hoop cylinder assembly, and performing a grouting operation;
• and
• step S5:
• after grouting, forming a reinforcement and repair structure on the outer wall of the steel pipe pile when grouting materials are solidified.