Feasibility study on sinkhole monitoring with fiber optic strain sensing nerves

作     者：Yuxin Gao Honghu Zhu Liang Qiao Xifeng Liu Chao Wei Wei Zhang Yuxin Gao;Honghu Zhu;Liang Qiao;Xifeng Liu;Chao Wei;Wei Zhang

作者机构：School of Earth Sciences and EngineeringNanjing UniversityNanjing210023China Institute of Earth Exploration and SensingNanjing UniversityNanjing210023China 

出 版 物：《Journal of Rock Mechanics and Geotechnical Engineering》 (岩石力学与岩土工程学报（英文版）)

年 卷 期：2023年第15卷第11期

页      面：3059-3070页

核心收录：

学科分类：08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：support provided by the National Natural Science Foundation of China(Grant Nos.42225702,and 42077232) the Open Research Project Program of the State Key Laboratory of Internet of Things for Smart City(University of Macao)(Grant No.SKL-IoTSC(UM)-2021-2023/ORP/GA10/2022) 

主　　题：Sinkhole Geotechnical monitoring Distributed fiber optic sensing(DFOS) Artificial neural network(ANN) Ground settlement Soil arching Micro-anchor 

摘      要：Anthropogenic activity-induced sinkholes pose a serious threat to building safety and human life ***-time detection and early warning of sinkhole formation are a key and urgent problem in urban *** paper presents an experimental study to evaluate the feasibility of fiber optic strain sensing nerves in sinkhole *** the artificial neural network(ANN)and particle image velocimetry(PIV)techniques,a series of model tests have been performed to explore the relationship between strain measurements and sinkhole development and to establish a conversion model from strain data to ground *** is demonstrated that the failure mechanism of the soil above the sinkhole developed from a triangle failure plane to a vertical failure plane with increasing collapse ***,the soil-embedded fiber optic strain sensing nerves allowed deformation monitoring of the ground soil in real ***,the characteristics of the measured strain profiles indicate the locations of sinkholes and the associated shear *** on the strain data,the ANN model predicts the ground settlement ***,micro-anchored fiber optic cables have been proven to increase the soil-to-fiber strain transfer efficiency for large deformation monitoring of ground collapse.