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The Effect of GSI on the Stability Parameters in the Vaulted Tunnels

Journal Name:

  • International Journal of Science and Engineering Investigations

Publication Year:

  • 2015

Key Words:

Author NameUniversity of Author
Abstract (2. Language): 
This paper presents numerical analysis of the effect of geological strength index (GSI) on the stability parameters by means of elasto-plastic finite element method. In numerical analysis, a 2D finite element program with software Phase2 is utilized. The vaulted tunnels are modeled with the height of 7 meters and widths of 4, 6, 8 and 10 meters, and the values of GSI is selected equal to 25, 33, 45, 55 and 65. The results of the evaluations show that by increasing GSI, the surface settlement, displacement and yielded elements around tunnels have decreased and the effect of radius of tunnel arch in the stability parameters has reduced. Furthermore, by increasing GSI, the ratio of optimal arch radius to width of tunnel has reduced.
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REFERENCES

References: 

[1] L.R. Alejano, A. Rodr´ıguez-Dono, E. Alonso and G. Fern_andez-Manin, “Ground reaction curves for tunnels excavated in different quality rock masses showing several types of post-failure behaviour”. Tunnelling and Underground Space Technology, 2009, 24, 689–705.
[2] R. Hill, In: “The mathematical theory of plasticity”. New York: Oxford University Press, 1950.
[3] E. Hoek, and T. Brown, “Practical estimates of rock mass strength”. Int. J. Rock Mech. Min. Sci. , 1997 34 (8), 1165–1186.
[4] E. Hoek, C. Carranza-Torres and B. Corkum, “Hoek–Brown Failure Criterion—2002 Edition”. Rocscience, 2002.
[5] S. Kaliszky, “Plasticity: Theory and Engineering Applications”. Amsterdam, Elsevier, 1989.
[6] R. Osgoui and P.P. Oreste, “Convergence–control approach for rock tunnels reinforced bygrouted bolts, using the homogenization concept”. Geotech. Geolog. Eng., 2007,25, 431–440.
[7] Rocscience, “A 2D finite element program for calculating stresses and estimating support around the underground excavations”. Geomechanics Software and Research. Rocscience Inc., Toronto, Ontario, Canada, 1999.
[8] Y.Q. Wang and Y.L. Xie, “The development and research of the arch tunnel in China”. Highway, 2008, 8, 216-219 (in Chinese).

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