埋入式光纤Bragg光栅应变传感器在隧道二次衬砌中的监测研究

Monitoring research of fiber Bragg grating strain sensors embedded in tunnel secondary lining

隧道二次衬砌性能劣化是影响隧道健康运营的主要病害,对隧道二次衬砌进行监测是保证隧道健康运营的重要手段。应用埋入式光纤Bragg光栅应变传感器深入研究了隧道二次衬砌的变化。通过FBG(Fiber Bragg Grating)传感器在隧道内的布设及温度补偿技术,对隧道断面的应变变化情况进行了分析。结果表明,数据的曲线走势在一定程度上反映了隧道二次衬砌的变化,为进一步的病害预报提供了有效的支持。

The performance degradation of secondary lining is the main disease that affects the operation of tunnel,monitoring the secondary lining is an important means to ensure the tunnel operate healthily.The changes of secondary lining are studied to apply embedded FBG strain sensor.According to the layout schemes of FBG and temperature compensation technology,the strain variation of the tunnel cross-section is analyzed.The results show that the data curve trend reflects changes in the tunnel secondary lining,the effective support is provided for disease forecasting further.