Application of novel distributed fibre-optic sensing for slope deformation monitoring: a comprehensive review

Acharya, Ashish; Kogure, Tetsuya

doi:10.1007/s13762-022-04697-5

Cited by 12 publications

(4 citation statements)

References 91 publications

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“…For rotational failure surfaces, the DAS sensitivity to strain changes will vary dependent on the difference in angle between the slip surface and the cable. However, others 40,44 have shown that DFOS can still be used successfully to detect and monitor the development of landslide shear zones over time, even in situations where the shear zone is perpendicular to the cable (e.g., when the cable is installed down a borehole). Future research should investigate the effect of cable geometry on the detectable strain thresholds.…”

Section: Discussionmentioning

confidence: 99%

“…5). As the strain is enclosed within a ber-optic cable comprising multiple layers with imperfect coupling to the surrounding ground, this results in a lower strain in the core versus the strain in the surrounding ground 39,40 . The temporal changes in displacement are well correlated, with the main increase in strain observed to occur on January 14 at noon in both the ShapeArray and DAS data.…”

Section: Assessment Of Das-derived Displacements With Geotechnical In...mentioning

confidence: 99%

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Previously hidden landslide processes revealed using distributed acoustic sensing with nanostrain-rate sensitivity

Ouellet,

Dettmer,

Lato

et al. 2024

Preprint

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Landslides can sometimes creep for decades before undergoing runaway acceleration and experiencing catastrophic failure. Observing and monitoring the evolution of strain in time and space is crucial to understand landslide processes, including the transition from slow to fast movement. However, the limited spatial or temporal resolution of existing landslide monitoring instrumentation limits the study of these processes. We present a method employing distributed acoustic sensing (DAS) strain data below 1 Hertz frequency over a three-day period of rainfall and quantify strain-rate changes at meter and sub-minute scales. The results reveal rainfall-triggered landslide processes, beginning with the onset of near-surface strain changes at the head scarp. Strain acceleration at a developing rupture zone, retrogression towards the scarp and flow-lobe activity is observed as the rainfall continues. The DAS-inferred processes with displacements of less than 0.5 mm are undetected using other landslide monitoring techniques. Our method illuminates landslide processes occurring with nanostrain-rate sensitivity at spatiotemporal resolution previously not possible.

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Section: Discussionmentioning

confidence: 99%

Section: Assessment Of Das-derived Displacements With Geotechnical In...mentioning

confidence: 99%

Previously hidden landslide processes revealed using distributed acoustic sensing with nanostrain-rate sensitivity

Ouellet,

Dettmer,

Lato

et al. 2024

Preprint

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show abstract

“…Utilizing this technology allows for the local or overall monitoring of target areas, thereby obtaining complete panoramic point cloud data and a real-time grasp of the dynamic changes in the slope, avoiding the limitations of single-point monitoring and offering a high scanning efficiency and non-contact measurement advantages [8]. Researchers domestically and abroad Buildings 2023, 13, 1589 2 of 17 have monitored the deformation of slopes and landslides through different methods such as "3S" technology [9,10], synthetic aperture radar interferometry [11][12][13][14][15], distributed optical fiber sensing technology [16][17][18][19], and photogrammetry [20][21][22]. Gili et al [9] monitored landslides in the eastern Pyrenees of Spain using GPS technology, with results demonstrating good precision.…”

Section: Introductionmentioning

confidence: 99%

“…Zhu et al [17] studied the feasibility and economic analysis of using a new type of distributed optical fiber transmitter for landslide monitoring, discovering a high monitoring efficiency and stability in slope and tunnel construction civil engineering monitoring. Acharya et al [18] emphasized the important considerations for deformation sensing when installing fiber optic cables in boreholes/shallow trenches and the coupling mechanism between ground anchors and cables. Embedding fiber optic cables in shallow trenches or burying them in boreholes can detect early signs of failure before a collapse.…”

Section: Introductionmentioning

confidence: 99%

A Case Study on the Application of 3D Scanning Technology in Deformation Monitoring of Slope Stabilization Structure

Tong

Peng

et al. 2023

Buildings

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Traditional deformation monitoring suffers from issues such as the point-based representation of surfaces and low measurement efficiency. Moreover, the majority of researchers study the deformation of slopes using methods such as 3S technology, synthetic aperture radar interferometry, distributed fiber optic sensing technology, etc. Based on this, a slope stabilization structure deformation monitoring method based on 3D laser scanning technology is proposed. First, with the slope stabilization structure of Caihong Road as the engineering background, point cloud data of the slope stabilization structure is obtained using a Trimble SX10 device. Second, the point deformation, overall deformation, and line deformation of the two-phase slope stabilization structure point cloud data are analyzed. Finally, the measurement accuracy of the 3D laser scanning technology is evaluated. The results show that the deformation analysis of points, lines, and surfaces can complement each other, thereby comprehensively assessing the situation of slope stabilization structure deformation. Moreover, the maximum displacement value in the deformation of points, lines, and surfaces is 8.52 mm, which does not exceed the standard, and 93.61% of the point deformation is between −0.76~0.92 mm, indicating that the slope stabilization structure is in a safe and stable state. The independent sample t-test has a test statistic of t = 2.074, verifying that the 3D laser scanning technology and the total station measurement accuracy are highly consistent and can meet the needs of actual engineering. The results of this study can provide a reasonable theoretical and methodological reference for analyzing similar engineering deformation monitoring in the future.

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Towards hydrometeorological thresholds of reservoir-induced landslide from subsurface strain observations

Ye,

Zhu,

Wang

et al. 2024

Sci. China Technol. Sci.

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Application of novel distributed fibre-optic sensing for slope deformation monitoring: a comprehensive review

Cited by 12 publications

References 91 publications

Previously hidden landslide processes revealed using distributed acoustic sensing with nanostrain-rate sensitivity

Previously hidden landslide processes revealed using distributed acoustic sensing with nanostrain-rate sensitivity

A Case Study on the Application of 3D Scanning Technology in Deformation Monitoring of Slope Stabilization Structure

Towards hydrometeorological thresholds of reservoir-induced landslide from subsurface strain observations

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