（中铁大桥局集团第一工程有限公司  郑州 450053）
【提要】  环境介质的侵袭是影响预应力混凝土结构腐蚀的关键因素，控制预应力混凝土结构腐蚀的重点应该是控制结构的防水。多层防护和监视检测是结构防水的关键。分析认为，要实现预应力结构的长期耐久性能保护，需要及时审定现行国家标准和规范，从总体规划、施工设计、建造细节、操作程序、试验检测、工人素质、设备性能、材料材质以及认证制度等诸多方面进行控制和实施。
【关键词】  预应力混凝土结构  耐久性  腐蚀机理  多层次防护  监视与检测
Corrosion Protection for Prestressed Structure/Sun Xinxi（China Zhongtie Major Bridge Engineer Group Co.，Ltd.，Zhengzhou 450053，China）
Abstract:The ingress of environmental medium is major cause of the durability problem of posttensional RC structure. A key element of protection of the steel against corrosion for internally ducted tendons is to keep water off the structure and the reinforcement. Emphasis should be put on the concept of multilayer protection and inspection and monitoring methods. It concludes that to guarantee long term protection of the tendons and durability of the structure，all involved in the construction process such as over all concept，design，details，procedures，inspection and monitoring，training of workers，equipments，material，qualification and approval，should be considered.
Keywords:prestressed concrete structure；durability；corrosion mechanism；multilayer protection；inspection and monitoring