为评价海底隧道支护结构环境腐蚀性等级和分析二次衬砌混凝土抗腐蚀性能，采用相关技术标准、规范和室内加速腐蚀试验进行综合分析。结果表明，厦门翔安隧道二次衬砌外壁环境腐蚀性等级为严重的D级，内壁为非常严重的E级，得到设计采用；矿渣组（水胶比0.36，单掺60%矿渣粉）和共掺组（水胶比0.36，掺15%粉煤灰+60%矿渣粉）综合性能均满足C45强度要求，且具有良好的抗腐蚀性能，推荐作为厦门翔安隧道二次衬砌高性能混凝土配合比的参考；根据耐久性设计综合研究成果，厦门翔安隧道最终采用推荐的共掺组二次衬砌配合比方案。

In order to evaluate the environment corrosion and to analyze the anticorrosion capacity of the secondary lining of subsea tunnels, a series of researches based on both technical codes and indoor accelerated corrosion tests are carried out. The result shows that the corrosion grade of the exterior side of the secondary lining of Xiang’an tunnel in Xiamen is Grade D, and that of the interior side of the secondary lining of Xiang’an tunnel is grade E. The results have been applied in the design of Xiang’an tunnel. Both Type A mixing proportion (water/binder ratio of 0.36, 60% of slag powder) and type B mixing proportion (water/binder ratio of 0.36, 15% of fly ash and 60% of slag powder) can meet the strength requirement of C45 concrete and can achieve good anticorrosion capacity, therefore they are recommended for Xiang’an tunnel. In the end, Type B mixing proportion is adopted for the concrete of the secondary lining of Xiang’an tunnel.