Abstract: Through the design and installment of a quick deflection monitoring system on Gaojiahuayuan Bridge，the monitoring data after fire disaster in box beam are analyzed． Since the system performs a long term deflection monitoring for the deflection change of the bridge in a short time after fire disaster，the monitoring data could guide the research on the structure deformation of the bridge after the fire．

Key words: Gaojiahuayuan Bridge, fire in box beam, deflection monitoring

摘要： 通过设计、安装重庆嘉陵江高家花园大桥快速挠度监测系统，并分析了该桥火灾后的监测数据，结果对指导桥梁状态评估起到较好作用。在桥梁受火灾后很短时间内该系统就可以开始观察、监测桥梁后期挠度变化情况，因此相关数据对研究桥梁火灾后结构变化具有一定指导意义。

关键词: 高家花园大桥, 箱梁火灾, 挠度监测