首页|Monitoring shear deformation of sliding zone via fiber Bragg grating and particle image velocimetry

Monitoring shear deformation of sliding zone via fiber Bragg grating and particle image velocimetry

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Monitoring shear deformation of sliding zones is of great significance for understanding the landslide evolution mechanism,in which fiber optic strain sensing has shown great potential.However,the cor-relation between strain measurements of quasi-distributed fiber Bragg grating(FBG)sensing arrays and shear displacements of surrounding soil remains elusive.In this study,a direct shear model test was conducted to simulate the shear deformation of sliding zones,in which the soil internal deformation was captured using FBG strain sensors and the soil surface deformation was measured by particle image velocimetry(P1V).The test results show that there were two main slip surfaces and two secondary ones,developing a spindle-shaped shear band in the soil.The formation of the shear band was successfully captured by FBG sensors.A sinusoidal model was proposed to describe the fiber optic cable deformation behavior.On this basis,the shear displacements and shear band widths were calculated by using strain measurements.This work provides important insight into the deduction of soil shear deformation using soil-embedded FBG strain sensors.

LandslideShear bandFiber bragg grating(FBG)Particle image velocimetry(PIV)Sinusoidal modelStrain-displacement proportionalcoefficient

Deyang Wang、Honghu Zhu、Guyu Zhou、Wenzhao Yu、Baojun Wang、Wanhuan Zhou

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School of Earth Sciences and Engineering,Nanjing University,Nanjing,210023,China

Institute of Earth Exploration and Sensing,Nanjing University,Nanjing,210023,China

State Key Laboratory of Internet of Things for Smart City,University of Macau,Macau,China

National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaOpen Research Project Program of the State Key Laboratory of Internet of Things for Smart City(University of Macau)

4222570242077235SKL-IoTSCUM-2021-2023/ORP/GA10/2022

2024

10.1016/j.jrmge.2023.03.007

岩石力学与岩土工程学报(英文版)
中国科学院武汉岩土力学所中国岩石力学与工程学会武汉大学

岩石力学与岩土工程学报(英文版)

CSTPCD
影响因子：0.404
ISSN：1674-7755
年,卷(期)：2024.16(1)
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