南海首个旧单点海上拆除吊装方案设计

根据涠洲10-3单点的结构特点，提出对其采用整体拆除的拆除思路。针对该单点整体吊装需求，借鉴钢桩吊装方案创新性地设计吊桩器吊装方案，借鉴隔水套管吊装方案创新性地设计套筒镗孔吊装方案。此外，还分别开展调平吊耳吊装方案、盲板吊装方案和吊耳吊装方案等3种吊装方案设计。通过对上述5种吊装方案的技术可行性分析，在综合考虑项目多方面因素后，涠洲10-3单点拆除项目最终选用吊耳吊装方案。在吊耳吊装方案应用实例中，分析吊点板式吊耳安装在套筒外侧的原因，论述所选用的吊点板式吊耳结构形式及其采用环形筋板的优点，并通过对该单点整体吊装强度的有限元分析，证明选用吊耳吊装方案设计的可行性。

Design of Lifting for Offshore Removal of First Abandon Single Point Mooring in the South China Sea

According to the structure character of WZ10-3 single point mooring, the method of lifting removal as a whole is raised. Considering the requirement of lifting removal as a whole for this single point mooring, lifting pile tool method is designed creatively inspired by pile lifting method, sleeve boring method is designed creatively inspired by conductor lifting method, and 3 other kinds of lifting methods, such as balancing padeye lifting method, blind plate lifting method and padeye lifting method, are also designed. By analyzing the technical feasibility of these 5 kinds of lifting methods and by overall considering various factors of the project, the padeye lifting method is chosen at last. In the padeye lifting design, the reason for padeye welded on the outside of the sleeve is analyzed, the advantages of padeye lifting method and ring stiffeners are also described, and finite element analysis is taken out for the structure strength check of the single point mooring lifting as a whole. It is concluded that the design of the padeye lifting method is feasible.