戈壁滩盐渍土地区桥涵结构物耐久性设计研究  

Study on Durability Design of Bridge Culvert Structure in Salinized Soil Area of Gobi Desert

作　　者：黄继兴 樊小伟 Huang Jixing;Fan Xiaowei

机构地区：[1]中交第二航务工程勘察设计院有限公司

出　　处：《城市道桥与防洪》2019年第7期133-135,160,M0016,共5页Urban Roads Bridges & Flood Control

摘　　要：戈壁滩盐渍土地区的环境较为特殊,盐渍土和地下水中的盐分会对钢筋混凝土造成严重的腐蚀和破坏,工程中必须采取一定的措施来保护钢筋混凝土,保证戈壁滩盐渍土地区桥涵构造物的耐久性。以G215线柳园至敦煌公路工程为工程案例,根据桥涵结构中混凝土和钢筋受腐蚀破坏的机理及部位,并结合设计规范及工程经验,提出了钢筋混凝土的防腐蚀技术措施,对桥涵结构物的后期养护运营起到了积极的作用,也为戈壁滩盐渍土地区的新建公路工程提供参考和借鉴。The environment in the salinized soil area of the gobi desert is more special. The salinity in the salinized soil and underground water will seriously corrode and damage the steel reinforced concrete. A certain measures must be taken to protect the steel reinforced concrete in the projects and ensure the durability of bridge culvert structures in the salinized soil areas of the gobi desert. Taking the G215 Line Liuyuan - Dunhuang Highway Project as an engineering case, based on the mechanism and location of corrosion damage of the concrete and rebar in bridge culvert structure, and combined with the design specifications and engineering experience, this paper puts forward the anti-corrosion technical measures for the steel reinforced concrete, which plays the positive role in the later maintenance and operation of bridge culvert structures, and provides the reference for the new highway projects in the salinized soil areas of the gobi desert.

关 键 词：戈壁滩盐渍土 桥涵结构 耐久性设计 物理腐蚀 化学腐蚀 

分 类 号：U441[建筑科学—桥梁与隧道工程]