京港澳高速公路刘江黄河特大桥火灾后修复技术

Repairing Technology of Liujiang Yellow River Bridge After Fire for Beijing-Hongkong-Macao High-speed Railway

结合京港澳高速刘江黄河特大桥火灾后修复实践,介绍了该项目损伤程度鉴定及火灾后快速修复典型技术,创新采用格构式拆板吊卸法吊除受损混凝土桥面板。采取施工过程监测及荷载试验,研究得出实测控制指标均在预警值内且小于理论计算值,证明本项目采用的系列技术取得良好灾后修复加固效果。

Combined with the practice of fire repairing of Liujiang Yellow River Bridge in BeijingHongkong-Macao high-speed railway,this paper introduces the damage degree identification of the project and the typical technology of rapid repairing after fire. The method of removing the damaged concrete bridge deck with lattice disassembly and lifting is innovatively adopted. Through the monitoring and load test during construction,the results show that the measured control indexes are both within the warning value and less than the theoretical value,which proves that the series of technologies adopted in this project can achieve good post disaster rehabilitation and reinforcement effect.