河北省高速公路桥梁盐碱蚀病害的现状分析及防治措施

Current Situation Analysis and Prevention Measures on Salt and Alkali Corrosion Disease of Expressway Bridge of Hebei Province

河北省高速公路有相当比例的桥梁存在与碱蚀有关的病害,病害主要包括上部结构剥落露筋,铰缝、湿接缝、横隔板渗水碱蚀,上部结构渗水碱蚀,下部结构腐蚀等,这些病害引起混凝土强度降低、钢筋锈胀,严重影响桥梁结构的耐久性和行车安全。

Quite a proportion of the expressway bridges of Hebei Province have diseases related to alkali corrosion. The diseases mainly includes reinforce bar exposure resulted from upper structure spalling, hinge joints, wet juncture, diaphragm plate water seepage alkali corrosion, upper structure alkali corrosion, lower structure corrosion, etc. These diseases cause decrease of concrete strength, reinforce bar corrosion and expansion and seriously affect the durability of bridge structure and traffic safety.