Abstract: There is argument in correctness of Terzaghi′s effective stress principle. The separate calculation of water and soil suits for sandy soil, which is consistent with the effective stress principle of Terzaghi, while integrate calculation of soil and water suits for cohesive soil, which is not inconsistent with effective stress principle of Terzaghi. The origin and core content of Terzaghi′s effective stress principle are analyzed, and it is points out that the view of Terzaghi takes pore water pressure as neutralization stress (neutralization stress has no effect on soil deformation) is not correct, and the effective stress derived from it is not correct as well. In this paper, the principle of effective stress of new saturated soil is derived by using the force balance principle of horizontal crosssection and introducing specific yield parameters. The calculated water and soil pressure is more consistent with the actual situation. The results can provide reference for the development of theoretical soil mechanics and calculation of water and soil pressure.

Key words: Terzaghi′s effective stress principle, neutralization stress, effective stress, specific yield, new effective stress principle of saturated soil