Study on Excavation Procedure of Dawangou Shallow Tunnel under Unsymmetrical Pressure

Abstract:

The performance of a tunnel is influenced by such factors as the size and shape of the opening, the in-situ stress and the deformation field and also properties of the rock mass. Different excavation procedures have great important influence on the stability of the surrounding rock, especially for tunnels under unsymmetrical pressure. In this paper, flac^3D is used in the simulation of different excavation sequence for Dawanggou tunnel in order to analyze the variation of plastic zones and deformation of the surrounding rock. The numerical results indicate that the mechanical index is different due to variant excavation plans and an optimized plan is determined based on the comprehensive analysis of the index gained from the simulation results.

• Periodical: Applied Mechanics and Materials (Volumes 353-356)
• Pages: 1539-1542
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.353-356.1539
• Online since: August 2013
• Authors: Su Chao Xu*, T. Y. Liu, C.Y. Jin
• Keywords: Excavation Procedure, FLAC^3D, Numerical Simulation, Tunnel Engineering

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