Estimating mechanical rock mass parameters relating to the Three Gorges Project permanent shiplock using an intelligent displacement back analysis method

摘要: Establishing the mechanical rock mass parameters is one of important tasks for highwall stability analysis permanent shiplock at Three Gorges Project in China. Existing back methods are not sufficient to provide necessary accuracy and recognize non-linear relations. The new displacement method proposed this paper a combination neural network, an evolutionary calculation, numerical techniques. relation involving adequately recognized by network networks learn using technique, with samples created orthogonal design tested cases given event design. With model established, genetic algorithm over large search space global range. predicted occurring each excavation step from January 1998 end their cumulative values 5 later steps closely characterized technique.