Uniform effective stress equation for soil mechanics

Indexed by:会议论文

Included Journals:EI

Volume:2

Page Number:1043-1046

Abstract:The internal force of soil skeleton may, according to its different effect, be seperated into two groups of different balance system, including one by external load, and the pore fluid pressure and the skeleton internal force by it. In this paper we define the soil skeleton stress as the soil skeleton internal force by the external load excluding the pore fluid pressure. Then taking the soil skeleton, pore water and pore air as independent analysis object, we educe the soil differential equation of equilibrium from the balance analysis of infinitesimal. By comparing with the soil differential equation of equilibrium of total stress after adding up the soil differential equation of equilibrium of each phase of the soil, we can obtain the relationship expression of total soil stress, skeleton stress and pore fluid pressure, which is considered as the soil skeleton stress equation, equivalent to the effective stress equation by Terzaghi in the saturated condition. Therefore, the uniform soil mechanics effective stress equation is obtained, indicating the physical property of the effective stress equation is the interaction of inter-phase forces. The effective stress expression on the basis of the shearing strength equivalent or volume deformation equivalent can be expressed with the soil skeleton stress or pore fluid pressure as well.

Date of Publication:2013-09-02