IJE TRANSACTIONS B: Applications Vol. 21, No. 3 (October 2008) 235-248   

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M. Gharavi*
College of Civil Engineering, Iran University of Science and Technology
P.O. Box 16846, Tehran, Iran
N. Shafiezadeh
epartment of Civil and Environment Engineering, University of Alberta
P.O. Box T6G 2W2, Edmonton, Canada

*Corresponding Author
( Received: January 09, 2008 – Accepted in Revised Form: May 09, 2008 )

Abstract    It is of great importance to consider long-term stability of rock mass around the openings of underground structure, during design, construction and operation of the said structures in rock. In this context, three methods namely, empirical, analytical and numerical have been applied to design and analyze the stability of underground infrastructure at the Siah Bisheh Pumping Storage Hydro-Electric Power Project (HEPP) in Iran. The geological and geotechnical data utilized in this article were selected and based on the preliminary studies of this project. In the initial stages of design, it was recommended that, two methods of rock mass classification Q and RMR should be utilized for the support system of the underground cavern. Next, based on the structural instability, the support system was adjusted by the analytical method. The performance of the recommended support system was reviewed by the comparison of the ground response curve and rock support interactions with surrounding rock mass, using FEST03 software. Moreover, for further assessment of the realistic rock mass behavior and support system, the numerical modeling was performed utilizing FEST03software. Finally both the analytical and numerical methods were compared, to obtain satisfactory results complimenting each other.


Keywords    Empirical Method, Analytical Method, Numerical Method, Ground Response Curve, Design, Stability Analysis



1. Engineering Report, “Engineering Geology and Geotechnical Investigations-Phase II”, Lameyer and Moshanir, Vol. I, No. 3, (1986), Completely Used.

2. Shafiezadeh, N., “Design, Stability Analysis and support System Design Siah Bisheh Cavern Powerhouse Project”, M. S. Final thesis of Rock Mechanics Faculty of Technical, Tarbiat Modarres University, Tehran, Iran, (2003).

3. Soil and Rock Laboratory Investigation Report, Lameyer and Moshanir, Vol. I, (1986), Totally Used.

4. Bieniawski, Z. T., “Engineering Rock Mass Classification”, John Wiley and Sons, Pennsylvania, U.S.A., (1989).

5. Barton, N., “Some New Q-Value Correlations to Assist in Site Characterization and Tunnel Design”, Int. J. Rock Mech. Min. Sci., Vol. 39, (2002), 185-216.

6. Ramamurthy, T., “A Geo-Engineering Classification for Rocks and Rock Masses”, Int. J. Rock Mech. Min. Sci., Vol. 41, (2003), 89-101.

7. Hoek, E., “Rock Engineering”, Course Notes, E-Book, http://www.rocsience.com/, ( September, 1998).

8. Hoek, E. and Brown, E., T., “Underground Excavation in Rock”, Institute of Mining and Metallurgy, London, U.K., (1980).

9. Palmstorm, A., “RMI-A Rock Mass Classification System for Rock Engineering Purpose”, Ph. D Thesis, Oslo University, Norway, (1995).

10. Wittke, W., “Rock Mechanics”, Springer, New York, U.S.A., (1990).

11. Wittke, W., “Stability Analysis for Tunnels”, Springer, New York, U.S.A., (2000).

12. FEST03 Users Manual, Version E.1, WBI Consulting Engineers for Tunneling and Geotechnical Engineering, Aachen, Germany, (2001).

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