RESEARCH ON DEFORMATION MECHANICS OF MYYANPO SLOPE CREEP DEFORMATION ROCK MASS

摘要

Due to the construction excavation and heavily raining, resulted in serious creep deformation on the Mayanpo slope. Through the analysis of the deformation monitoring material, together with the in situ detail geological survey results, this paper present the deformation characters of the slope rock mass. As an effective numerical method used in analysis the discontinue surface of geotechnical material such as fault, bedding plane and joints, DEM (Discrete Element Method) was used in this paper. With the two-dimension DEM software UDEC, this paper analysis the deformation characters and mechanism in detail. Three cases were used in the numerical modeling. First, an initial static loading is applied in this model to simulate the prevailing rock mass conditions at the site. Second, excavation cutting of the slope was simulated. Third, heavily raining was simulated by saturated the joint condition. In doing so, the model simulates the effect of degradation of discontinuities in the rock mass. This study has provided some insight into the deformation mechanism of the Mayanpo slope. The simulation results indicate that the deformation of Mayanpo slope rock mass was mainly controlled by weak interlayer, while the construction cutting and raining are the external inducing factors. The results of this paper can provide some reference to the similar engineering.