Citation

Wang K, Zhang S, Chen J, Teng P, Wei F, Chen Q. Sensors (Basel) 2017; 17(11): s17112486.

Affiliation

Chongqing Institute of green and Intelligent Technology, Chinese Academy of Sciences, Chongqing 400714, China. chenqiao@cigit.ac.cn.

Copyright

(Copyright © 2017, MDPI: Multidisciplinary Digital Publishing Institute)

DOI

10.3390/s17112486

PMID

29084157

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.

Language: en

Keywords

FBG; PVC tube; slip surface monitoring; slope model