2007•Highway EngineeringRequires access

Supporting Principle and Numerical Simulation Analysis on Deformation and Destruction of Large Span Multi-Arch Tunnel

Long Xujian

Abstract

Based on projects of a tunnel,the excavation and support procedure of construction and also the case strength reduction of are modeled on the condition of using the modern principle.Through analyzing the alteration of the surrounding rock displacement,stress after strength reduction and the alteration of mechanical response of the surrounding rock.The failure criterion of surrounding rock in numerical simulation analysis and the stability of the surrounding rock impacting by blasting,construction and ground water are discussed.

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Key concepts: Strength reduction, Geotechnical engineering, Arch, Excavation, Deformation (meteorology), Computer simulation, Displacement (psychology), Rock blasting