Analysis on Effective Coefficient of Porous Continuous Medium in Seepage Field

Abstract

Abstract When a porous continuous medium is in a saturated state, the effect of pore water pressure on its deformation depends on the effective coefficient in the stress equation. Determination of this coefficient is an important subject for analyzing the deformation of porous continuous media in the seepage field. This work considers a porous continuous medium with square pores to determine the effective coefficient by combining theoretical analysis and a numerical test method. The water element analysis method is applied to further verify the value of the effective coefficient and to analyze the influence of pore water pressure on the deformation of a porous continuous medium from a mesoscopic perspective. Then, the correctness of the pore water pressure is verified using the initial strain method. Through the above methods, the action mechanism of pore water pressure on porous continuous media could be further understood. A reasonable and accurate method for calculating the effective coefficient is also provided. The correct method for analyzing the deformation of porous continuous media in the seepage field is also explained.