A Technical Guide for Assessment, Setting Up, and Protection of Rockbolts for Hydroelectric Facilities
Publication: Geo-Congress 2023
ABSTRACT
Hydro-Quebec owns more than 680 dams and dykes, and a large number of appurtenant structures such as powerhouses, spillways, and water intakes distributed among 100 hydroelectric installations. Such large structures require deep surface and underground rock excavations coupled with rock reinforcement systems that insure stability and safety. The geological context for most of these hydroelectric installations requires ground support design, which mainly relies on permanent mechanically anchored rock bolts, fully grouted after installation. Over the years visual inspections revealed noteworthy corrosion on visible parts of rock bolts in delimited areas. The purpose of this paper is to present the results of an industrial research project initiated to investigate the extent of corrosion, its effect on bolt serviceability, and possible causes of premature rock bolts aging in a hydroelectric setting. This paper will present the importance and benefits of rock bolt environmental characterization, selection of suitable corrosion protection, and implementation of selected protection. The outcomes of this research served for the development of a technical guide to be used for inspection and maintenance.
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REFERENCES
Béranger, G., and Mazille, H. (2002). Corrosion des métaux et alliages : mécanismes et phénomènes. Paris: Hermes Science Publications.
Bertolini, L. (2004). Corrosion of steel in concrete: prevention, diagnosis, repair. Weinheim, Wiley-VCH.
Cigna, R., Andrade, C., Nürnbergrt, U., Polder, R., Weydert, R., and Seitz, E. (2003). Corrosion of Steel in Reinforced Concrete Structures –. Bruxelles: European Commission.
Crosky, A., Fabjanczyk, M., Gray, P., Hebblewhite, B., and Smith, B. (2002). Premature Rock Bolt Failure (A. C. A. R. Program, Trans.): The University of New South Wales Mining Research Centre, SCT Operations Pty Ltd, Ground Support Services Pty Ltd.
Dorion, J. F. (2013). La Corrosion du Soutènement Minier. (Thèse de Doctorat. Université Laval. Québec, Canada).
Gamboa, E., and Atrens, A. (2003). Environmental influence on the stress corrosion cracking of rock bolts. Engineering Failure Analysis, 10(5), 521–558.
Habib, P., and Logeais, L. (1995). Tirants d’ancrage : Recommandations concernant la conception, le calcul, l’exécution et le contrôle. Recommandations T.A. 95. In Comité Français de la Mécanique des Sols et des Travaux de Fondations (Ed.), (pp. 184): Eyrolles.
Landolt, D. (1993). Corrosion et chimie de surfaces des métaux. Lausanne, Suisse: Presses polytechniques et universitaires romandes.
Li, C., and Lindblad, K. (1999). Corrosivity classification of the underground environment. Dans Rock support and reinforcement practice in mining: proceedings of the international symposium on ground support. Kalgoorlie, Western Australia, pp 15–17. Rotterdam, Pays-Bas: Balkema Pub., AA/Taylor & Francis.
Pourbaix, M., and de Zoubov, N. (1974). Section 12.1: Iron. In M. Pourbaix (Ed.), Atlas of Electrochemical Equilibria in Aqueous Solutions (pp. 307–321). Houston, Texas USA: Natl. Ass. of Corrosion Engineers.
Post-Tensionninig Institute. (2014). Recommendations for Prestressed Rock and Soil Anchors. Londres, Royaume-Uni.
Revie, R. W. (2011). Uhlig’s Corrosion Handbook (3rd Edition). New York, USA : John Wiley & Sons.
Roy, J. M., Preston, R., and Bewick, R. P. (2016). Classification of Aqueous Corrosion in Underground Mines. Dans Rock Mechanics and Rock Engineering, Feb., 2016.
The Highways Agency. (1999). Design Manual for Roads and Bridges (DMRB) Volume 2, section 1, part 7 – Use of rockbolts. Écosse, BA -80/99.
Withiam, J. L., Fishmann, K. L., Gaus, M. P., and T. R. B. N. C. H. R. Program. (2002). Recommended practice for evaluation of metal-tensioned systems in geotechnical applications. Washington, D.C., National Academy Press.
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Geo-Congress 2023
Pages: 22 - 34
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Published online: Mar 23, 2023
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