南京九华山隧道主体结构变形分布式光纤监测技术应用

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。

Nanjing Jiuhuashan Tunnel Use FBG Technology for Supervision Tunnel Main Structure Deformation

FBG is applied to establish the long-term supervision system monitoring the deformation of main structure of Nanjing Jiuhuashan Tunnel.During the operation stage,the system monitors the concrete strain and displacement of expansion joint and makes analysis to the results.The monitoring results show that the deformation of tunnel(both the mountain section and the lake section),which is influenced by environment,seasonal temperature difference and precipitation,is within the safe threshold value.