2008•Technology of Highway and TransportRequires access

Research on Construction Mechanics of a Large-span Multi-arch Tunnel in Guangzhou-Hezhou Expressway

Xie Fen

Abstract

During construction of large-span multi-arch tunnel,many construction steps and sequences cause a lot of adverse factors which lead to the difficulty of construction.This paper carries out the dynamic simulation and research for the complete excavation process of a large-span multi-arch tunnel in Guangzhou-Hezhou Expressway by means of finite element method and proposes problems which are easy to raise during the construction of large-span tunnel by monitoring the dynamic variations of the displacement,stress and plastic areas of the wall rock,thus providing the basis for design and construction of the large-section multi-arch tunnel.

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Key concepts: Arch, Span (engineering), Excavation, Structural engineering, Engineering, Displacement (psychology), Finite element method, Stress (linguistics)