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随着城市化进程的加快,城市地下结构污染腐蚀耐久性成为工程人员关注的焦点问题。根据大量文献调研,系统总结了国内外地下结构污染腐蚀耐久性研究历史、现状,同时对城市地下结构混凝土、内部钢筋的污染腐蚀机理、试验方法以及耐久性影响因素等重要问题进行了论述。比较和梳理了各种污染介质扩散模型及地下结构腐蚀劣化典型室内试验结果,并对24SO?和Cl?双侵蚀、应力腐蚀、腐蚀疲劳耦合作用下的地下结构耐久性寿命预测理论进行了探讨。列举了两类城市地下工程,继而分析了两类典型城市地下结构的污染腐蚀耐久性响应特性。最后,在已有研究成果基础上分析了城市地下结构污染腐蚀耐久性研究方面存在的问题和不足,并指出和强调今后的研究思路和发展方向,以期更好地推进城市地下工程污染腐蚀耐久性的研究。
With the acceleration of urbanization, the pollution corrosion durability of underground structures in cities has become a focus issue for engineers. According to a large number of literature surveys, the history and status quo of the research on the durability of the pollution of underground structures at home and abroad have been systematically summarized. At the same time, important issues such as the pollution corrosion mechanism, test methods, and durability influencing factors of urban underground concrete and internal steel bars have been discussed. Comparing and combing the diffusion model of various contaminated media and the typical indoor test results of corrosion degradation of underground structures, the durability life prediction theory of underground structures under the coupled effects of 24SO and Cl double erosion, stress corrosion, and corrosion fatigue was discussed. Two types of urban underground engineering are listed, and then the pollution corrosion durability response characteristics of underground structures of two typical types of cities are analyzed. Finally, on the basis of existing research results, the problems and deficiencies in the study of the pollution corrosion durability of urban underground structures are analyzed, and the future research ideas and development directions are pointed out and emphasized in order to better promote the pollution corrosion durability of urban underground engineering. Research.