为保障深中通道沉管隧道管节钢壳船坞内移位二次坐墩的结构受力安全，验证混凝土浇筑工位与钢壳总拼工位分离优化方案的可行性，通过建立精细化局部钢壳有限元模型计算分析支承力在不同偏位量下对结构的影响。该方法给出了钢壳结构最不利支承部位的精细化应力计算结果，弥补了整体管节计算模型对细节部位模拟的不足。在此基础上，考虑安全富余和船舶制造操作经验，确定钢壳二次坐墩的精度控制标准，同时验证支承设计与隔仓构造设计匹配的安全性。

In order to guarantee the structural stress safety of the steel shell after shift and secondary sitting onto the dock piers of ShenzhenZhongshan link immersed tunnel tube, and verify the feasibility of optimization scheme of separating the concrete casting station and the steel shell assembly station, the refined local steel shell finite element model is established to calculate and analyze the influence of the support with different deviation on the structure. The method gives the refined stress calculation results of the most unfavorable supporting position of the steel shell structure, remedying for the shortage of the overall tube model in the simulation of detailed parts. On this basis, considering the safety margin and shipbuilding operation experience，the accuracy control requirement of the steel shell secondary sitting onto the dock piers is determined, and the safety of the design matching of the support and the compartment structure is verified.