铁路混凝土桥梁耐久性设计研究  

Study on Durability Design of Concrete Bridge of the Railway

作　　者：李晓波 LI Xiaobo(China Railway Design Corporation,Tianjin 300308,China)

机构地区：[1]中国铁路设计集团有限公司,天津300308

出　　处：《高速铁路技术》2022年第5期49-52,共4页High Speed Railway Technology

摘　　要：随着服役年限的增加,铁路钢筋混凝土桥梁面临的耐久性问题日益突出。本文基于现场调研并结合国内外研究成果,分别论述了6种不同环境类别下钢筋混凝土结构的腐蚀机理,研究了水灰比、矿物掺合料等影响因素对混凝土结构耐久性能的作用机理和影响效果,提出了不同环境类别作用下混凝土桥梁的耐久性设计要求及强化措施,并对耦合环境作用给出了具体的设计建议。研究成果可为设计者开展桥梁混凝土结构耐久性设计提供借鉴。With the increase in service life,reinforced concrete bridges of railway show increasingly prominent problems with durability. Based on the field investigation and the research results at home and abroad,this paper discusses the corrosion mechanism of reinforced concrete structures under 6 different environmental categories,studies the action mechanism and impact effect of impact factors such as water-cement ratio and mineral admixtures on the durability of concrete structures,and puts forward the durability design requirements and strengthening measures of concrete bridges under different environmental categories. It also gives specific design suggestions for the environment coupling action. The research results can provide a reference for the designers to carry out the durability design of bridge concrete structures.

关 键 词：钢筋混凝土桥梁 耐久性 环境类别 腐蚀机理 

分 类 号：U448.33[建筑科学—桥梁与隧道工程]