光纤土体形变测量方法的实验研究
首发时间:2006-07-04
摘要:提出了一种用于土体形变测量的双包层光纤传感器,可潜在应用于土坝等大型结构的无损检测与健康度评估和滑坡等地质灾害的预报。文中给出了光纤土力学传感器的结构,设计了土体形变测量的光纤传感器标定装置。在实验室中建立了土体坝段和边坡的实物仿真模型,采用白光干涉光纤形变测量方法,在标定试验的基础上和静力载荷情况下,对土坝模型的变形量进行了观测。结果表明,双包层光纤土力学传感器可以真实反映土体的形变。
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Experiment Study of Soil Deformation Measurement Based on Optic Fiber Sensor
Abstract:This paper introduces a double-coating fiber optic sensor which is used for measurement of soil deformation. Its potential applications are in damage examination of large scale structures, evaluation of the civil structural health and forecast the movements of landslide. The structure of the fiber sensor and the calibration device used in soil deformation measurement are designed and demonstrated. A simulation model of soil dam and a landslide sliding model are constructed in ore experiments. As the static press applied on the measured model, the deformations of the inside the models are detected by using the white-light fiber optic interferometer. The results show that the soil mechanics fiber optic sensor can truly reflect the strain inside the soil model deformation.
Keywords: Optic Fiber Sensors White-Light Interference Soil Calibration Deformation Measurement
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