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Excavation Simulation of Tunnel with Loess-Rock Belt Geological Condition

With the development of in the western area, transportation infrastructure meets more and more tunnels covered by loess soil. During the excavation of these tunnels, special geological problems are inevitably encountered when through the loess-rock interface. With regard to these problems, the present paper establishes a three-dimensional numerical model by finite different software Flac 3D. Based on this model, the up-down excavation processes of the tunnel through loess-rock interface are simulated.