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辽河特大桥为主跨436m的双塔双索面斜拉桥,位于辽河入海口处。本项目混凝土结构耐久性不但要考虑海水及淡水双重腐蚀,还要考虑冻融损伤对耐久性的影响,因此,对混凝土结构耐久性有非常高的要求。结合工程实例,重点介绍高性能混凝土、外加电流阴极保护、防腐涂层等提高混凝土耐久性措施在本桥混凝土中的应用。
The main span of the Liaohe River Bridge spanning 436m is the twin-tower double cable plane cable-stayed bridge located at the mouth of the Liaohe River. The durability of concrete structures in this project not only considers the dual corrosion of seawater and freshwater, but also considers the impact of freeze-thaw damage on durability. Therefore, there is a very high requirement on the durability of concrete structures. Combined with engineering examples, focusing on high performance concrete, plus current cathodic protection, anti-corrosion coating and other measures to improve the durability of concrete in the bridge concrete application.