Rock-lining interaction calculations for tunnels excavated in Hoek-Brown rock mass considering excavation damaged zone

Document Type : Research Article

Authors

1 Department of civilengineering, Estahban higher education center

2 Department of civil and environment engineering, Amirkabir university of technology

Abstract

In this paper, the behavior of tunnels under different damage conditions is examined. In this regard, a fully analytical solution is proposed. The solution is presented for a lined tunnels excavated in elastic–brittle–plastic rock masses with Hoek–Brown failure criterion. The damaged zone is assumed to have cylindrical shape with reduced parameters. On the other hand, the lining is assumed to be homogenous, elastic and cylindrical shaped. The interaction between the lining and the rock masses is also considered. The results obtained by the proposed solution are compared with other analytical and numerical methods. The results indicated that, the effects of the alteration of rock mass properties in the damaged zone may be considerable.

Keywords

Main Subjects


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