运用分布式光纤传感技术FBG,建立了南京九华山隧道主体结构变形的离线长期监测系统,介绍了FBG测量原理。在隧道运营阶段中,对结构混凝土应变与伸缩缝位移进行了长期的监测,并对结果进行了分析。监测结果表明,隧道山体段与湖底段变形均处于安全阈值内,且隧道变形主要受到环境、季节温差、降水等因素影响。 Using distributed optical fiber sensing technology FBG, an offline long-term monitoring system of Nanjing Jiuhuashan tunnel main structure deformation was established, and the principle of FBG measurement was introduced. In the stage of tunnel operation, the long-term monitoring of the strain of concrete structure and the displacement of expansion joints was conducted, and the results were analyzed. The monitoring results show that the deformation of the mountain section and the lake bottom section of the tunnel are within the safety threshold, and the deformation of the tunnel is mainly affected by the environment, seasonal temperature difference and precipitation.