Simulation Analysis on the Creep Deformation of High Rock Slope at Discharge Structure Entrance of Jiang Ping River Hydropower Station

Since rock has the nature to creep, the high rock slope will continue creeping for a long time after excavation. If a building is constructed and completed during this period of time, a rigid structure will come into being to hold back the creep of high rock slope. Meanwhile, the high rock slope will exert on the building a strong force which will lead to deformation of the building. Therefore, regarding the high rock slope as a viscoelastic body, using the Kelvin-Volter model and adopting the full Newton-Raphson law, the adaptive decline iterative method and viscoelastic numerical calculation method, this paper makes a non-linear finite element analysis and calculation on the deformation of high rock slope after excavation, simulates the state of deformation throughout the whole proces and carries on a thorough study on the horizontal displacement and distribution over time. The result shows that, after excavation, the displacement over time can be divided into three phases: the 1st phase is the instant elastic deformation; the 2nd phase the developing period of creep deformation; the 3rd phase the stabilizing period of creep deformation. After a comprehensive analysis, the result provides an important reference to prevent the negative effects of creep deformation during the construction of entrance building.