海底隧道环境腐蚀性评价及二次衬砌混凝土室内加速腐蚀分析  

Evaluation on Environment Corrosion of Subsea Tunnels and Indoor Aaccelerated Corrosion Test on Secondary Lining Concrete

作　　者：王学斌[1] 

机构地区：[1]厦门路桥建设集团有限公司,厦门361026

出　　处：《隧道建设》2012年第6期796-801,共6页Tunnel Construction

基　　金：交通运输部行业联合科技攻关项目(2008353335240)

摘　　要：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 lin- ing of subsea tunnels, a series of researches based on both technical codes and indoor accelerated corrosion tests are car- ried out. The result shows that the corrosion grade of the exterior side of the secondary lining of Xiang＇ an tunnel in Xia- men 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 recom- mended for Xiang＇ an tunnel. In the end, Type B mixing proportion is adopted for the concrete of the secondary lining of Xiang＇ an tunnel.

关 键 词：海底隧道 环境腐蚀性等级 掺合料 室内加速腐蚀实验 

分 类 号：U455[建筑科学—桥梁与隧道工程]