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Application of the distinct element code PFC3D for simulating effects of tunnel failure on slope surface

S. Kuraoka & T. Makino

ABSTRACT: The risk of subsidence and instability of a natural slope, which may be caused by potential failure of a tunnel built in the slope, was assessed. Failure of soils and weathered rocks, due to potential tunnel failure, were simulated with the distinct element method code PFC3D, which models dynamic and static particle assemblies. Parameters of the model for the two particles in contact were determined through simulations of rock failure that was recorded at the time of construction. The strengths of the particle assemblies were then evaluated by simulation of compression tests such as the triaxial and plane strain tests. Simulated tunnel failure indicated not only settlement of slope surface, but also the possibility of a slope failure.

Available in Continuum and Distinct Element Numerical Modeling in Geo-Engineering - 2008

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