腐蚀性水环境下开裂地铁侧墙环氧灌浆效果试验研究  

作　　者：郑博宇 董宏波 毛江鸿 

机构地区：[1]重庆交通大学土木工程学院,重庆400074 [2]宁波市轨道交通集团有限公司,浙江宁波315101

出　　处：《科技创新与应用》2020年第11期77-78,81,共3页Technology Innovation and Application

摘　　要：沿海地区地下水环境中腐蚀性介质含量高,地铁侧墙开裂后存在高腐蚀风险。环氧树脂灌浆法是修复地铁侧墙裂缝的主要方法,然而修复后结构在腐蚀地下水环境中的长期服役性能尚不明确。文章利用干湿循环模拟腐蚀性水环境中环氧树脂灌浆修复后的混凝土长期劣化过程,结合电化学评估方法评价内部钢筋的腐蚀过程。结果表明,有效的环氧树脂灌浆修复将提升结构寿命至未开裂水平,但需要保障钢筋周围包裹环氧树脂材料。The groundwater environment in coastal areas has a high content of corrosive media,and there is a high risk of corrosion after the side walls of the subway crack.Epoxy resin grouting method is the main method for repairing cracks in the side walls of subways.However,the long-term service performance of the structure in the corroded groundwater environment after repair is not clear.In this paper,the dry-wet cycle is used to simulate the long-term deterioration process of concrete after epoxy resin grouting repair in corrosive water environment,and the electrochemical corrosion assessment method is used to evaluate the internal steel bar corrosion process.The results show that effective epoxy grouting repair will increase the life of the structure,but it is necessary to ensure that epoxy material is wrapped around the reinforcement.

关 键 词：地铁侧墙 耐久性 环氧灌浆 钢筋锈蚀 

分 类 号：U231.4[交通运输工程—道路与铁道工程]