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Open AccessArticle

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

1
Key Laboratory of Mountain Hazards and Earth Surface Process, Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu 610041, China
2
University of Chinese Academy of Sciences, Beijing 100049, China
3
College of Architecture & Environment, Sichuan University, Chengdu 610065, China
4
Institute of Acoustics, Chinese Academy of Sciences, Beijing 100190, China
5
Chongqing Institute of green and Intelligent Technology, Chinese Academy of Sciences, Chongqing 400714, China
*
Author to whom correspondence should be addressed.
Sensors 2017, 17(11), 2486; https://doi.org/10.3390/s17112486
Received: 6 September 2017 / Revised: 24 October 2017 / Accepted: 26 October 2017 / Published: 30 October 2017
(This article belongs to the Special Issue Fiber Bragg Grating Based Sensors)
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. View Full-Text
Keywords: FBG; PVC tube; slip surface monitoring; slope model FBG; PVC tube; slip surface monitoring; slope model
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MDPI and ACS Style

Wang, K.; Zhang, S.; Chen, J.; Teng, P.; Wei, F.; Chen, Q. A Laboratory Experimental Study: An FBG-PVC Tube Integrated Device for Monitoring the Slip Surface of Landslides. Sensors 2017, 17, 2486.

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