通过对海底隧道结构耐久性影响因素进行分析，并根据工程试验研究成果及设计施工技术经验，提出了渤海海峡隧道初期支护和二次衬砌结构耐久性的提高措施。对已成功修建的海底隧道耐久性设计参数进行分析整理，结合渤海海峡隧道的实际情况，采用工程类比法提出了渤海海峡隧道的耐久性设计参数，为渤海海峡隧道100年使用年限提供了有力的保障。

Through the analysis of factors affecting the durability of the tunnel structure,and according to the relevant engineering test results and the experience of design and construction technology, improving measures of the primary support and secondary lining durability of Bohai Strait tunnel were put forward. The durability design parameters of successfully built tunnel were analyzed. Combining with the actual situation of the Bohai Strait tunnel, the engineering analogy method was adopted to get the durability design parameters of the Bohai Strait tunnel. It could provide a strong guarantee to the fixed number of 100 years of the Bohai Strait tunnel.