Soil Water Content Measurement Using Polymer Optical Fibre Bragg Gratings

Abstract

Measuring soil water content is crucially important and can affect soil strength, which is a key parameter in the analysis, design and monitoring of geo-structures. In this study, an optical fibre Bragg grating sensor inscribed in polymer optical fibre was developed, and for the first time, its ability to measure soil water content was investigated. The sensitivity of the sensor to different values of gravimetric soil water content under the different compaction conditions of loose and normal compaction was tested. The effect of soil temperature on the sensor’s performance was considered. To assess the sensor’s implementation, accuracy and reliability, a commercial soil water content probe (SM150), which measures volumetric soil water content was employed. The results indicate that the developed sensor, when calibrated correctly, is able to provide detailed data on any minor variation of soil water content (e.g. 0.5%) with high precision. The outcomes of this study define an additional capability of the polymer optical fibre Bragg grating sensors, which is significantly important for the long-term performance monitoring of geo-structures.

Publication DOI: https://doi.org/10.1680/jsmic.21.00029
Divisions: College of Engineering & Physical Sciences > School of Infrastructure and Sustainable Engineering > Engineering Systems and Supply Chain Management
College of Engineering & Physical Sciences > Aston Institute of Urban Technology and the Environment (ASTUTE)
College of Engineering & Physical Sciences > Aston Logistics and Systems Institute
College of Engineering & Physical Sciences
College of Engineering & Physical Sciences > Aston Institute of Photonics Technology (AIPT)
College of Engineering & Physical Sciences > School of Infrastructure and Sustainable Engineering > Civil Engineering
Additional Information: © 2021 Thomas Telford Ltd. Original article available at https://www.icevirtuallibrary.com/doi/10.1680/jsmic.21.00029. Permission is granted by ICE Publishing to print one copy for personal use. Any other use of these PDF files is subject to reprint fees.
Uncontrolled Keywords: ground condition monitoring, gravimetric soil water content, polymer optical fibre Bragg grating (POFBG) sensor, geostructures,Civil and Structural Engineering,Geotechnical Engineering and Engineering Geology,Electrical and Electronic Engineering,SDG 11 - Sustainable Cities and Communities,SDG 9 - Industry, Innovation, and Infrastructure
Publication ISSN: 2397-8759
Last Modified: 18 Jul 2024 07:09
Date Deposited: 05 Jan 2022 10:50
Full Text Link:
Related URLs: https://www.ice ... /jsmic.21.00029 (Publisher URL)
PURE Output Type: Article
Published Date: 2022-01-15
Published Online Date: 2021-12-20
Accepted Date: 2021-12-01
Authors: Mehravar, Moura (ORCID Profile 0000-0002-2517-4475)
Yang, Hanrui
Webb, David J (ORCID Profile 0000-0002-5495-1296)
Zhang, Wei
Sestelani, Sina Fadaie
Chapman, David N

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