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The Use Of Distributed Fiber Optic Strain Sensing In Order To Conduct Quality Assurance And Quality Control For Ground Support

N Vlachopoulos, B Forbes, D Cruz

In the proceedings of: GeoEdmonton 2018: 71st Canadian Geotechnical Conference; 13th joint with IAH-CNC

Session: Rock Mechanics and Engineering Geology I

ABSTRACT: This paper focuses on the development of fiber optic strain sensing and its use in order to ensure that support elements have been installed according to specifications (Quality Control) and that they are performing correctly (Quality Assurance); both in a controlled laboratory environment and in-situ. Results of the testing program demonstrated that a developed fiber optic technique could determine material flaws within grouted rock support installation as well as determine the strain and capacity of support elements in the lab and in-situ. i.e. during pull-out tests. As well, results demonstrated the capability of the optical technique to capture expected loading mechanisms of the support elements throughout their serviceability life, agreeing well with numerical and theoretical predictions. The optical technique has been successfully employed on-site at mines and tunnels around the globe.


RÉSUMÉ: Cette recherche a été consacrée à la mise en place d’une technique permettant l’installation in situ du capteur optique avec des boulons d'ancrage et d’autres éléments de support. Le développement d’une telle technique optique est un projet considérable. Cet article se concentre sur le développement et l’utilisation de cette technologie afin de s’assurer que les éléments de support conformes aux spécifications (contrôle de qualité) et fonctionnent (assurance de qualité) dans un environnement de laboratoire contrôlé et in situ. Les résultats du programme d'essais ont démontré que cette technique peut déterminer les défauts dans l’installation de support dans la roche cimenté, la tension et la capacité des éléments de support en laboratoire et in situ, c’est-à-dire pendant les essais d’arrachement. De plus, les résultats ont démontré l’aptitude de telle technique afin de capturer les mécanisme de chargement attendus ces éléments de support tout au long de leur durée de vie, ce qui concorde aux prédictions numériques et théoriques. Cette technique a été utilisée avec succès sur site, dans les mines et les tunnels autour du monde.


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Cite this article:
Vlachopoulos, N, Forbes, B, Cruz, D (2018) The Use Of Distributed Fiber Optic Strain Sensing In Order To Conduct Quality Assurance And Quality Control For Ground Support in GEO2018. Ottawa, Ontario: Canadian Geotechnical Society.

@inproceedings{Vlachopoulos_GEO2018_139, author = {{Vlachopoulos, N}, {Forbes, B}, {Cruz, D}}
title = {The Use Of Distributed Fiber Optic Strain Sensing In Order To Conduct Quality Assurance And Quality Control For Ground Support}
booktitle = {Proceedings of the 71st Canadian Geotechnical Conference; 13th joint with IAH-CNC }
year = {2018}
organization = {The Canadian Geotechnical Society},
address = {Ottawa, Canada} }
Abstracts are Copyright © the Authors and used with permission. Online database Copyright © 2026 The Canadian Geotechnical Society. All rights reserved.