Considering the features of slope rock mass failure, this article applies residual thrust method and linear programming theory on the basis of FE (Finite Element) Method, to assess safety of each cell of slope rock mass in dangerous zone. Meanwhile, a C++ based 3D-Slope program is developed through the using of OOP (Object-Oriented Programming) technology for purposes of three-dimensional slope stability analysis. The results obtaining through applying 3D-Slope program in actual projects appear consistency with actual situation.
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