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3-Dimensional Modelling for the Rock Slope Excavation and Reinforcement by the Bolts in Civil Engineering

Rock jointed slopes are widely existed in geotechnical engineering, whose stability is the main content for design and construction. Recently, the limit equilibrium method is still mainly adopted to analyze the stability of jointed slope, in which the neither stress-strain relationship of rock mass, nor the deformation and stress response of rock mass in the jointed slope can be described well. Due to the complicated mechanism of jointed rock mass reinforced by bolts, the limit equilibrium method can no longer be available for analyzing the stability of this type of slope. So in the present paper, the 3-dimensional numerical simulation method is adopted to analyze the couple mechanism between the rock mass and bolts. Firstly the 3-dimensional numerical model is built, then the excavation of rock slope is simulated; in order to stabilize the slope, the rock bolts are placed in the slope, and the parameters of the bolts like the bolt length, bolt inclination, bolt spacing, to the stability of slope are studied. Some useful conclusions are obtained, which can give some guidance for the real practice.