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Ground response curves for rock excavations supported by ungrouted tensioned rockbolts

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Labiouse, V

A numerical analysis has been developed for the design of ungrouted tensioned rockbolts as support of excavations under axisymmetric conditions. The bolts dimensions (length, cross-section, longitudinal and circumferential spacings), their stiffness, their pre-tension load and the delay of installation are taken into account. Moreover, the method effects three main improvements in the usual theory, taking into consideration: 1. the reaction force transferred to the rock mass in the bolts anchoring zone, 2. the elastic recompression of the carrying ring surrounding the excavation due to the bolts preload, and 3. the relative displacement of the bolts ends which has a repercussion on their tension. Since the usual rock-support interaction analysis is only available when the rock mass and the support behave independently, an alternative solution has been explored for the bolting system (since it cannot be considered as an internal support). It consists to include the effect of the rockbolts into the ground reaction curve. In this paper, the principles of the analysis are explained and a numerical application is taken.

Document type Article de périodique (Journal article) – Article de recherche
Access type Accès restreint
Publication date 1996
Language Anglais
Journal information "Rock Mechanics and Rock Engineering" - Vol. 29, no. 1, p. 19-38 (1996)
Peer reviewed yes
Publisher Springer-verlag Wien (Vienna)
issn 0723-2632
e-issn 1434-453X
Publication status Publié
Affiliation UCL
Links
  1. A.F.T.E.S. (1986): Recommendations for use of convergence ? confinement method. Tunnels et Ouvrages Souterains 73 (1/2), 18.
  2. Brown, E. T., Bray, J. W., Ladanyi, B., Hoek, E. (1983): Ground response curves for rock tunnels. J. Geotechn. Engng. 109 (1) 15.
  3. Corbetta, F. (1990): Nouvelles méthodes d'étude des tunnels profonds. Calculs analytiques et numériques. Doctoral Thesis, Ecole National Supérieure des Mines de Paris.
  4. Hoek, E., Brown, E. T. (1980): Underground excavations in Rock. The Institution of Mining and Metallurgy, London, 525 pp.
  5. Holmberg, M. (1991): The mechanical behaviour of untensioned grouted rockbolts. Doctoral Thesis, Dept. of Soil and Rock Mechanics, Royal Institute of Technology, Stockholm.
  6. Labiouse, V. (1993): Etudes analytique et numériques du boulonnage à ancrage ponctuel comme soutènement de tunnels profonds creusés dans la roche. Doctoral Thesis, Université Catholique de Louvain, Louvain-la-Neuve.
  7. Lamé, G. (1852): Leçons sur la théorie de l'élasticité. Gauthiers-Villars, Paris.
  8. Panet, M. (1975): Analyse de la stabilité d'un tunnel creusé dans un massif rocheux en tenant compte du comportement après la rupture. Rock Mech. Rock Engng. 8 (4).
  9. Stille, H., Holmberg, M., Nord, G. (1989): Support of weak rock with grouted bolts and shotcrete. Int. J. Rock Mech. Min. Sci. 26 (1), 99.
Bibliographic reference Labiouse, V. Ground response curves for rock excavations supported by ungrouted tensioned rockbolts. In: Rock Mechanics and Rock Engineering, Vol. 29, no. 1, p. 19-38 (1996)
Permanent URL http://hdl.handle.net/2078.1/47368