Stability analysis of caverns excavated in heterogeneous salt formations

S  Nazary Moghadam; H  Mirzabozorg; A  Noorzad  and K  Nazokkar

doi:10.17485/ijst/2012/v5i8.22

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Stability analysis of caverns excavated in heterogeneous salt formations

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Indian Journal of Science and Technology

DOI: 10.17485/ijst/2012/v5i8.22

Year: 2012, Volume: 5, Issue: 8, Pages: 1-4

Review Article

Stability analysis of caverns excavated in heterogeneous salt formations

S. Nazary Moghadam¹ , H. Mirzabozorg¹ , A. Noorzad² and K. Nazokkar³

¹ Civil Engineering Department, K.N. Toosi University of Technology,
² Faculty of Water and Environmental Engineering,
³ Civil Engineering Department, Islamic Azad University, [email protected], [email protected], [email protected], [email protected]

This work is licensed under a Creative Commons Attribution 4.0 International License.

Abstract

In this paper, the influence of the presence of non-salt interbeds in the vicinity of salt caverns on the stability of the caverns was investigated. In order to describe the time-dependent inelastic behavior of rock salt, an empirical viscoplastic creep model bounded by a diagnostic failure criterion was utilized. The creep model is then implemented in a finite element program to analyze the stability of a storage cavern excavated in a salt formation interspersed with a non-salt interbed. Finally, stress distribution in the salt formation and time-dependent closure of the cavern obtained by the finite element analyses are presented and interpreted.
Keywords: Rock salt, Underground cavern, Viscoplasticity, Creep, Finite element analysis.