光纤光栅测试岩石变形的试件模拟实验研究
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摘要
为了预报松散含水岩层失水引起的沉降变形,采用预设钻孔埋入光纤Bragg光栅方法,对岩石变形进行监测,制作水泥砂浆试件4个,在实验室模拟预埋入光纤光栅砂浆试件的拉伸和压缩受力过程,测定光纤光栅波长偏移量,实验得出不同受力状态下光纤光栅的波长变化特征,采用光纤光栅传感技术是一种有效观测岩石变形的方法。
In order to forecast the subsidence deformation of the incompact hydrated strata because of the loss of water,adopting such ways that setting a drilling and burying fiber Bragg grating to inspect the rock deformation,making 4 concrete samples to simulate the process of pull and compression in the laboratory and measuring the excursion of wavelength,through experiment can get the different characteristic of wavelength changes under different pull and compression condition.The use of fiber Bragg grating sensor technique to detect the rock deformation is effective.
In order to forecast the subsidence deformation of the incompact hydrated strata because of the loss of water,adopting such ways that setting a drilling and burying fiber Bragg grating to inspect the rock deformation,making 4 concrete samples to simulate the process of pull and compression in the laboratory and measuring the excursion of wavelength,through experiment can get the different characteristic of wavelength changes under different pull and compression condition.The use of fiber Bragg grating sensor technique to detect the rock deformation is effective.
引文
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[9]万里冰.应用光纤Bragg光栅测量混凝土结构内部应变[J].光电子激光,2002,(7):722-725.WAN Li-bing.Determination of internal strain of concrete beam using fiber Bragg grating sensors[J].Journal of Optoelec-tronics Laser,2002,(7):722-725.
[10]June J,Nam H,Lee J H,et al.Simultaneous measurement of strain and temperature using a single fiber Bragg grating witherbium-doped fiber amplifier[J].Appl Opt,1999,(1):2 749-2 751.
[2]马少鹏.白光DSCM方法用于岩石变形观测的研究[J].实验力学,2002,(3):10-16.MA Shao-peng.Study on the white light DSCMmethod for deformation measurement of rock materials[J].Journal of Experi-mental mechanics,2002,(3):10-16.
[3]刘力强.岩石变形实验热红外观测系统[J].地震地质,2004,(9):492-499.LIU Li-qiang.Infrared measurement system for rock deformation experiment[J].Seimology and Geology,2004,(9):492-499.
[4]蒋斌松.深部岩体变形的混沌预测方法[J].岩石力学与工程学报,2005,(8):2 934-2 940.JIANG Bin-song.Chaotic prediction method of rock mass deformation in depth[J].Chinese Journal of Rock mechanics andEngineering,2005,(8):2 934-2 940.
[5]周智.混凝土结构的光纤光栅智能监测技术[J].功能材料,2003,(3):344-348.ZHOU Zhi.Smart monitoring technique of concrete structures based on optical fiber bragg grating sensors[J].Journal ofFunctional Materials,2003,(3):344-348.
[6]柴敬.光纤Bragg光栅锚杆应力应变监测系统[J].西安科技大学学报,2005,25(1):1-4.CHAI Jing.Stress-strain monitoring system of fiber bragg grating sensing for mining anchor[J].Journal of Xi′an University ofScience and Technology,2005,(3):1-4.
[7]柴敬.岩梁变形监测的分布式光纤传感技术[J].岩石力学与工程学报,2004,(12):4 068-4 071.CHAI Jing.Distributed optical fiber sensor for monitoring rock deformation[J].Chinese Journal of Rock Mechanics and En-gineering,2004,(12):4 068-4 071.
[8]Friebele P.Fibre Bragg grating strain sensors.present and future applications in smart structures[J].Optics and PhotonicsNews,1998,(9):33-37.
[9]万里冰.应用光纤Bragg光栅测量混凝土结构内部应变[J].光电子激光,2002,(7):722-725.WAN Li-bing.Determination of internal strain of concrete beam using fiber Bragg grating sensors[J].Journal of Optoelec-tronics Laser,2002,(7):722-725.
[10]June J,Nam H,Lee J H,et al.Simultaneous measurement of strain and temperature using a single fiber Bragg grating witherbium-doped fiber amplifier[J].Appl Opt,1999,(1):2 749-2 751.
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