天津滨海地区地铁工程耐久性影响因素分析

Analysis of Factors to the Durability of Subway Engineering in Tianjin Coastal Area

鉴于天津滨海地区地铁工程环境的复杂性和特殊性,对影响耐久性的氯离子侵蚀、硫酸盐侵蚀、杂散电流、碳化破坏和冻融破坏等主要外部工程环境因素进行了分析和阐述,主要分析了其成因、机理及现行规范中的相关规定等,为工程的耐久性设计、施工及运营提供参考借鉴。最后建议天津滨海地区地铁工程建设引入针对性的耐久性专题研究,以保证百年设计目标的顺利实现。

In view of the complexity and particularity of the subway engineering environment in Tianjin coastal area,the main external engineering environmental factors of durability are analyzed and expounded,such as chloride ion corrosion, sulfate attack,carbonation,stray current and freeze-thaw damage and so on,the causes of formation,the failure mechanism and the relevant regulations of current codes are analyzed to provide reference for the durability design,the construction and operation.Finally,it is suggested that durability study should be introduced in the engineering construction,in order to en-sure the design goal.