Application of novel distributed fibre-optic sensing for slope deformation monitoring: a comprehensive review
Application of novel distributed fibre-optic sensing for slope deformation monitoring: a comprehensive review
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DOI：
10.1007/s13762-022-04697-5
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发表时间：
2022-12
影响因子：
3.1
通讯作者：
A. Acharya-;T. Kogure
中科院分区：
文献类型：
--
作者：
A. Acharya-;T. Kogure
近几十年来，分布式光纤传感技术在包括边坡工程在内的多个技术领域得到了迅速发展，因为它具有传统滑坡监测方法无法比拟的优势。光纤（FO）电缆可以嵌入浅沟或埋在钻孔中，以便在坍塌前检测故障的初步迹象。通过测量发送和反向散射光，FO系统可以从电缆的变化中检测到质量移动，从而可以进行早期预警测量。本文简要讨论了光纤的基本原理，然后简要解释了各种DFOS技术（瑞利，布里渊，和拉曼后向散射）的传感原理。重点介绍了在钻孔/浅沟中安装FO电缆进行变形传感的重要考虑因素以及地锚-电缆耦合机制。DFOS应用于边坡变形监测的最新进展，从实验室模型尺寸到现场规模进行了详细讨论，强调在过去十年内取得的进展。最后，讨论了DFOS传感面临的一些挑战和未来的发展前景。工程地质学家和斜坡灾害缓解规划者预计将受益于广泛的，深入的信息收集在这里。
Distributed fibre-optic sensing (DFOS) has developed expeditiously over recent decades in multiple technical fields, including slope engineering, as it furnishes several advantages over conventional landslide monitoring approaches. Fibre-optic (FO) cables can be embedded in a shallow trench or buried in a borehole to detect precursory signs of failure well before collapse. By measuring sent and backscattered light, FO systems detect mass movement from changes on the cable so that early warning measurements can be made. This review paper briefly discusses the fundamentals of optical fibres, followed by a compendious explanation of the sensing principle of various DFOS techniques (Rayleigh, Brillouin, and Raman backscattering). The significant considerations for installing an FO cable in a borehole/shallow trench for deformation sensing and the ground-anchor-cable coupling mechanism are emphasised. The most recent advancements of DFOS applications on slope deformation monitoring from the laboratory model size to the field scale are discussed in great detail, emphasising the progress made within the last ten years. Ultimately, some challenges associated with DFOS sensing and future development prospects are discussed. Engineering geologists and slope hazard mitigation planners are anticipated to benefit from the wide-ranging, in-depth information gathered here.