The Simulation Analysis of Large Cross-Section Soft Rock Tunnel Excavation under the Bias Terrain
Abstract: Taking a High-speed railway tunnel as the background, This paper analyses not only the stress and displacement of surrounding rock , the plastic area distribution and size, but also the size and distribution of initial support internal force in two excavation schemes, based on the criterion of underground engineering structure design theory and rock elastic-plastic succumb Drucker-Prager, Under the guidance of New Austria Tunneling Method, this paper makes numerical simulation of soft rock tunnel excavation in large sections and initial support with the finite software ANSYS11.0. The stress and displacement of surrounding rock and the plastic area distribution and size under two excavation schemes are analyzed, the size and distribution of initial support internal force under two excavation schemes are also investigated .By comprehensive comparing advantages and disadvantages of two schemes, this paper makes some significant conclusions and gives reference for the similar tunnel design and construction.
G. Zhang and H. B. Liu, "The Simulation Analysis of Large Cross-Section Soft Rock Tunnel Excavation under the Bias Terrain", Applied Mechanics and Materials, Vols. 90-93, pp. 1853-1858, 2011