使用BOTDR技术进行隧道监测的光纤护套效应

发布时间：2018-05-20 12:14

本文选题：隧道监测 + 光缆选型　；参考：《岩土力学》2017年08期

【摘要】：基于BOTDR的布里渊应变监测技术已在岩土工程领域得到了初步的应用,但一系列的试验及工程应用表明,不同类型的光缆得到的测试结果呈现较大的差别性,原因就是光纤护套效应。以BOTDR的光纤应变监测技术为基础,并通过精准定位(温度刺激)、应变测量范围(漂移量)及温度测量等一系列试验,对新型应变光缆、套装光缆以及铠装光缆的工程性能进行了对比试验研究,得到了光纤护套效应对巷道监测结果的影响,甄别了适用于不同工程应用的光缆类型,并保证监测结果与实际变形及温差变化的一致性。这些研究工作初步解决了使用BOTDR技术进行巷道应变监测的光缆选型的问题,为基于BOTDR的应变监测技术的工程应用提供了理论基础。
[Abstract]:Brillouin strain monitoring technology based on BOTDR has been applied in geotechnical engineering, but a series of tests and engineering applications show that the test results of different types of optical cables show great difference. The reason is the fiber sheath effect. Based on the fiber strain monitoring technology of BOTDR, and through a series of experiments such as precise positioning (temperature stimulation, strain measurement range (drift) and temperature measurement, etc.), the new strain fiber cable is studied. In this paper, the engineering performance of the fiber optic cable and armored fiber optic cable are compared and studied. The influence of fiber sheathing effect on the monitoring results of roadway is obtained, and the types of optical fiber cable suitable for different engineering applications are identified. The monitoring results are consistent with the actual deformation and temperature difference. These researches have solved the problem of optical cable selection of tunnel strain monitoring using BOTDR technology and provided a theoretical basis for the engineering application of strain monitoring technology based on BOTDR.
【作者单位】：中国矿业大学(北京)力学与建筑工程学院;新疆工程学院采矿工程系;
【基金】：中央在京高校重大成果转化项目(No.ZDZH20141141301) 国家自然科学基金委员会与神华集团有限责任公司联合资助重点项目(No.U1261212,No.U1361210)~~
【分类号】：U456.3

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