【摘要】 通过对某滨海地区地铁工程沿线地下水中侵蚀性离子进行调查与分析,根据GB/T 50476—2008混凝土结构耐久性设计规范和TB 10005—2010铁路混凝土结构耐久性设计规范,对该工程存在的混凝土耐久性问题进行分析与论证。结果表明,该工程潜水中主要腐蚀离子为Cl^-和SO₄^2-;该工程存在的混凝土耐久性问题重点在于氯盐腐蚀,其次为硫酸盐及镁盐引起的盐类结晶腐蚀,碳化问题可忽略不计。更多还原

【Abstract】 Based on the investigation and analysis on the erosive ions of underwater along the subway project in Binhai new area of Tianjin,and according to Code for Design of Concrete Structure Durability（ GB/T 50476—2008） and Railway Concrete Structure Durability Design Specification（ TB 10005—2010）,the analysis and argumentation of the concrete durability of the project were obtained. The results showed that Cl^- and SO₄^2- are the main erosive ions in this project,the main problem of durability of concrete in this project is the chloride corrosion and the secondary problem is salt crystallization corrosion caused by sulfate and magnesium salt. Meanwhile,carbonation can be neglected.更多还原