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阐述了光纤Bragg光栅(FBG)技术的原理以及传感器的结构设计原理和方法,采用光纤Bragg光栅(FBG)传感技术研制了适合岩土工程使用的光纤光栅孔隙水压力计,对研制的6支光纤光栅孔隙水压力计进行了试验检验并埋设于某高速公路软土路基中试测孔隙水压力以检验研发成果。实践结果表明该仪器克服了常规仪器的某些缺点,并有稳定性好、耐腐蚀等优点,可以较好地应用于岩土工程监测当中。本仪器的研制对于光纤传感技术在岩土工程领域的应用具有积极的推动作用。
The principle of fiber Bragg grating (FBG) technology and the principle and method of sensor structure design are described. Fiber Bragg Grating Water Pressure Gauge, which is suitable for geotechnical engineering, is developed by fiber Bragg grating (FBG) sensing technology. Fiber grating pore water pressure gauge was tested and buried in a highway soft soil embankment test pore pressure to test the results of research and development. Practice shows that the instrument overcomes some of the shortcomings of conventional instruments, and has good stability, corrosion resistance, etc., which can be better applied to geotechnical monitoring. The instrument for the development of optical fiber sensing technology in the field of geotechnical applications has a positive role in promoting.