干湿循环对旱区铁路桥梁性能劣化的影响  

WETTING AND DRYING INFLUENCE OF CORROSION OF REINFORCEMENT IN RAILWAY CONCRETE BEAMS IN ARID REGION

作　　者：王春芬[1] 牛荻涛[1] 董振平[1] 

机构地区：[1]西安建筑科技大学土木工程学院,西安,710055

出　　处：《建筑技术开发》2005年第8期32-34,共3页Building Technology Development

摘　　要：在对干旱地区铁路普通钢筋混凝土桥梁病害调查的基础上,分析了导致梁体钢筋锈蚀和保护层开裂的主要原因.通过实验验证了旱区大气环境下干湿循环对钢筋锈蚀的加速作用,针对目前梁体构造特点提出了整治和改进建议.The investigation of deterioration of railway reinforced concrete beams in arid region was executed. It was the wetting and drying at cover to reinforcement of concrete beams which caused corrosion and cracking. The result of corrosion tests shows that wetting and drying at cover to reinforcement can accelerate the rate of corrosion of steel. The suggestion of improving standard design of drainage construction for and repairing method for existing beams is also put forward in this paper.

关 键 词：旱区 干湿循环 铁路桥梁 钢筋锈蚀 

分 类 号：U441[建筑科学—桥梁与隧道工程] TU279.72[交通运输工程—道路与铁道工程]