Lining Design for Alborz Tunnel in Iran

Abstract

The paper describes the application of analytical methods if tunnel linings design under static, tectonic and seismic effects for the design of the transport tunnel Albors in Iran. The methods are based on solutions of the corresponding plane problems of the elasticity theory simulating the initial stress fields in the rock mass caused by gravitational or tectonic forces and actions of long arbitrary directed longitudinal (P) and shear (S) waves propagating in the plane of the tunnel cross-section. For the design of tunnel linings under seismic effects the original approach has been applied consisting in the determination of maximal compressive and tensile circumferential stresses wich may appear in points of the lining internal outline at any combinations and directions of P- and S- waves

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