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（中鐵大橋局集團(tuán)第一工程有限公司  鄭州 450053）
【提要】  環(huán)境介質(zhì)的侵襲是影響預(yù)應(yīng)力混凝土結(jié)構(gòu)腐蝕的關(guān)鍵因素，控制預(yù)應(yīng)力混凝土結(jié)構(gòu)腐蝕的重點(diǎn)應(yīng)該是控制結(jié)構(gòu)的防水。多層防護(hù)和監(jiān)視檢測是結(jié)構(gòu)防水的關(guān)鍵。分析認(rèn)為，要實(shí)現(xiàn)預(yù)應(yīng)力結(jié)構(gòu)的長期耐久性能保護(hù)，需要及時(shí)審定現(xiàn)行國家標(biāo)準(zhǔn)和規(guī)范，從總體規(guī)劃、施工設(shè)計(jì)、建造細(xì)節(jié)、操作程序、試驗(yàn)檢測、工人素質(zhì)、設(shè)備性能、材料材質(zhì)以及認(rèn)證制度等諸多方面進(jìn)行控制和實(shí)施。
【關(guān)鍵詞】  預(yù)應(yīng)力混凝土結(jié)構(gòu)  耐久性  腐蝕機(jī)理  多層次防護(hù)  監(jiān)視與檢測
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