Abstract: The long-term monitoring of secondary tunnel lining stress and strain is always a focus problem in geotechnical engineering field. This paper analyzed the principle of optical fiber bragg grating sensor and proposed the idea that the optical fiber bragg grating sensor should be applied to the monitoring of secondary tunnel lining stress and strain. Meanwhile, test of fiber bragg grating sensors and steel wire sensor as well as analysis on advantages of the each two was held, the result showed that the optical fiber bragg grating sensor was of the advantage that very high test precision, long-term stability and remote signal transmission. Thus, it is effective and reliable for long-term monitoring.

摘要： 隧道二次衬砌应力?应变状态的长期监测,一直是国内外岩土工程界关注的焦点?对此,分析了光纤光栅传感器传感原理,提出了将光纤布拉格光栅传感器应用于隧道二次衬砌应力?应变监测的新方案?同时,在现场进行光纤布拉格光栅传感器与钢弦式传感器的对比实验,并进行优势分析?实验结果表明:光纤布拉格光栅传感器具有很高的测试精度,长期稳定性好,信号传输距离远,为长期监测提供了一种可靠有效的手段?