海潮影响区既有混凝土桥梁耐久性不足现象非常普遍,迫切需要进行维护。结合“沿海海潮影响区混凝土桥梁耐久性评价与防腐技术研究”中取得的研究成果,提出了海潮影响区既有混凝土桥梁抗氯离子侵蚀耐久性恢复设计的原则、基本规定、设计方法,并给出了一个设计实例。 The existing concrete bridges in the Tide Affected Area have the problem of insufficient durability and are in urgent need of maintenance. Combining with the research results in “Evaluation of Durability of Concrete Bridges and Anticorrosion Technology in Coastal Tide-affected Area”, the principles, basic rules and design methods of design for restoration of durability against chloride ion erosion of existing concrete bridges in tide-affected area are proposed Out of a design example.