Abstract
viscoelasto-plastic; double yield surface; equivalent sand wall; finite element; Abstract. Based on double yield elastoplastic model, one viscoelasto-plastic model is dealt with in detail. The method of transferring to equivalent sand wall is introduced when soft soil is treated by plastic drainage plate. The viscoelasto-plastic model and modified Cam-Clay model are applied into the finite element calculation of soft foundation treatment of a tailing dam. By comparison, it can be got that the displacement calculated by the viscoelasto-plastic model is closer to monitoring data than that calculated by modified Cam-Clay model. It demonstrates the reasonableness and efficiency of the viscoelasto-plastic model．
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