借鉴已建成海底隧道的成功经验，采用工程类比法进行渤海海峡隧道支护结构形式及参数设计。通过调研及对比分析，支护结构形式采用复合式衬砌，针对各级围岩初期支护采用相应的支护措施组合方案。隧道主要采用限量排放的防排水系统，衬砌外水压力采用折减系数法计算。在衬砌结构受力分析时，分析了不同水压力下衬砌的安全系数，并初步确定衬砌的设计参数。

Referring to the successful experience of subsea tunnels having been completed,the engineering analogy method can be adopted to design supporting structure form and parameters of Bohai Strait tunnel. Through the investigation and comparative analysis, composite lining is used. For all levels of the surrounding rock,corresponding combination supporting measures are adopted in the primary support design. Tunnel mainly adopts limited emissions scheme,and reduction factor method is used to calculate the water pressure on lining. In the stress analysis of lining structure, safety coefficients under different water pressure are analyzed,and the design parameters of secondary lining are preliminarily determined.