城市地下复杂化学环境混凝土结构耐久性研究现状

摘要

我国正处于城市地下工程建设高速发展时期.与地上结构相比,城市地下结构的服役环境更为复杂,污染源更加多样,结构混凝土极易遭受多种腐蚀性离子的侵蚀,材料性能将不断劣化,最终引起结构功能失效、服役寿命大幅缩短,因此,开展城市地下复杂化学环境混凝土耐久性研究显得尤为重要和紧迫.对城市地下复杂化学环境混凝土结构耐久性研究研究成果进行了系统的介绍,对现有研究中存在的问题进行了深入分析,在此基础上提出进一步的研究建议,旨在促进我国城市地下工程耐久性相关科学技术的发展.%Nowadays,China is in the period that urban underground construction is developing at a high speed.Compared with the superstructure,the service environment of urban underground structure is more complex,while the pollution sources is more diverse.Therefore,structural concrete is vulnerable to erosion by a variety of corrosive ion.Furthermore,the material property is going to degenerate continuously,which will cause the failure of structural condition and the reduction of service life dramatically.Therefore,it is urgent and significant to carry out the research on durability of urban underground concrete structure in the complex chemical environment.In this paper,a systematic introduction of the research on durability of urban underground concrete structure in the complex chemical environment is given.Meanwhile,the problems exist in the research are,analyzed.Then,several suggestions are made in order to promote the development of relative scientific technology of urban underground engineering durability in China.