一项实验室实验研究：一种用于监测滑坡滑动面的光纤光栅-聚氯乙烯管集成装置。

A Laboratory Experimental Study: An FBG-PVC Tube Integrated Device for Monitoring the Slip Surface of Landslides.

作者信息

Wang Kai, Zhang Shaojie, Chen Jiang, Teng Pengxiao, Wei Fangqiang, Chen Qiao

机构信息

Key Laboratory of Mountain Hazards and Earth Surface Process, Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu 610041, China.

University of Chinese Academy of Sciences, Beijing 100049, China.

出版信息

Sensors (Basel). 2017 Oct 30;17(11):2486. doi: 10.3390/s17112486.

DOI:10.3390/s17112486

PMID:29084157

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC5712886/

Abstract

A new detection device was designed by integrating fiber Bragg grating (FBG) and polyvinyl chloride (PVC) tube in order to monitor the slip surface of a landslide. Using this new FBG-based device, a corresponding slope model with a pre-set slip surface was designed, and seven tests with different soil properties were carried out in laboratory conditions. The FBG sensing fibers were fixed on the PVC tube to measure strain distributions of PVC tube at different elevation. Test results indicated that the PVC tube could keep deformation compatible with soil mass. The new device was able to monitor slip surface location before sliding occurrence, and the location of monitored slip surface was about 1-2 cm above the pre-set slip surface, which basically agreed with presupposition results. The monitoring results are expected to be used to pre-estimate landslide volume and provide a beneficial option for evaluating the potential impact of landslides on shipping safety in the Three Gorges area.

摘要

为了监测滑坡的滑动面，设计了一种将光纤布拉格光栅（FBG）与聚氯乙烯（PVC）管集成的新型检测装置。利用这种基于FBG的新装置，设计了一个具有预设滑动面的相应边坡模型，并在实验室条件下进行了七次不同土壤性质的试验。将FBG传感光纤固定在PVC管上，以测量不同高程处PVC管的应变分布。试验结果表明，PVC管能够与土体保持变形协调。该新装置能够在滑坡发生前监测滑动面位置，监测到的滑动面位置比预设滑动面高约1-2厘米，这与预设结果基本一致。预计监测结果可用于预估滑坡体积，并为评估三峡地区滑坡对航运安全的潜在影响提供有益选择。