首页|Fiber optic monitoring of an anti-slide pile in a retrogressive landslide

Fiber optic monitoring of an anti-slide pile in a retrogressive landslide

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Anti-slide piles are one of the most important reinforcement structures against landslides,and evalu-ating the working conditions is of great significance for landslide mitigation.The widely adopted analytical methods of pile internal forces include cantilever beam method and elastic foundation beam method.However,due to many assumptions involved in calculation,the analytical models cannot be fully applicable to complex site situations,e.g.landslides with multi-sliding surfaces and pile-soil interface separation as discussed herein.In view of this,the combination of distributed fiber optic sensing(DFOS)and strain-internal force conversion methods was proposed to evaluate the working conditions of an anti-sliding pile in a typical retrogressive landslide in the Three Gorges reservoir area,China.Brillouin optical time domain reflectometry(BOTDR)was utilized to monitor the strain distri-bution along the pile.Next,by analyzing the relative deformation between the pile and its adjacent inclinometer,the pile-soil interface separation was profiled.Finally,the internal forces of the anti-slide pile were derived based on the strain-internal force conversion method.According to the ratio of calculated internal forces to the design values,the working conditions of the anti-slide pile could be evaluated.The results demonstrated that the proposed method could reveal the deformation pattern of the anti-slide pile system,and can quantitatively evaluate its working conditions.

Anti-slide pileMulti-sliding surfacePile-soil interfaceBrillouin optical time domain reflectometry(BOTDR)Geotechnical monitoringReservoir landslide

Lei Zhang、Honghu Zhu、Heming Han、Bin Shi

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School of Water Resources and Environment,China University of Geosciences,Beijing,100084,China

State Key Laboratory of Hydroscience and Engineering,Tsinghua University,Beijing,100084,China

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

School of Civil and Environmental Engineering,Nanyang Technological University,639798,Singapore

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Young Scientists Fund of the National Natural Science Foundation of ChinaNational Science Fund for Distinguished Young Scholars of ChinaState Key Program of National Natural Science Foundation of China

419072324222570241230636

2024

10.1016/j.jrmge.2023.02.011

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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