Abstract
The left bank slope in JinpingⅠhydropower station is one of the highest slope with the maximum excavation and the worst stability conditions in the current hydro power stations in the world. Based on the combination of the elasto-viscoplastic finite element method and artificial neural networks, a model of back analysis of the mechanical parameters of slope is established. In this paper, the left bank slope (II1-II1) in JinpingⅠhydropower station is taken as an example．Construction procedure and anchor measures are simulated carefully; the key mechanical parameter of rock is back analyzed according to the monitored displacement; the real time forecast of deformation and stability of the rock slope are realized by this model based on the monitored displacement. Most of research results are taken as the references for the optimization of design and information construction in the practical engineering．
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