Abstract: based on the effective stress approach by Terzaghi, the paper presents the parametric variational principle for seepage and consolidation with elastoplasticity in sotl-The proposed principle is nciple is free from the restraint of Drucker's postulate of plasticity, consequently suitable for solving the nonassociated plastic flow problems in seepage and consolidation of soil.based on the effective stress approach by Terzaghi, the paper presents the parametric variational principle for seepage and consolidati...