A New Calculation Method for the Soil Slope Safety Factor

Abstract

Based on the unified strength theory, a new method to calculate the plane soil slope safety factor was derived that considers the effect of intermediate principal stress 2 and at-rest lateral pressure coefficient 0 . Calculation examples from the literature were used to compare the new calculation method and the current slice method; the results showed that both provided good consistency. The new method can provide a reference for slope stability evaluation. The new method was used to calculate the soil slope safety factors for different values of intermediate principal stress parameter , double shear stress parameters , and static lateral pressure coefficient 0 . The results showed that the safety factor increased when was increased; first increased and then decreased when was increased; and increased when 0 was increased. These results show that the intermediate principal stress as well as the stress state and its changes cannot be ignored during soil slope stability analysis. The slope soil characteristics and stress state should be considered to determine the unified strength theoretical parameters and static lateral pressure coefficient, maximize the potential of slope soil strength, and effectively reduce the costs of soil slope engineering.

Stability Analyses of a Slope Reinforced with Piles Subjected to Static and Dynamic Loading Conditions

“…When it is necessary to state with a general expression, the safety factor of the slope attributes to the ratio of the shear strength of soil to the shear stress of a possible failure surface in the slope as given below [10]. (1) In addition to this, when the foregoing expression is expanded with parameters expressing the engineering properties of soils, as the conventional definition of the safety factor for any point within a soil mass, it is the ratio between the shear strength and stress at that point.…”

Ridge slope failure mode analysis using strength reduction method based on double shear unified strength criterion

“…And the limit balance method, fuzzy mathematical method, reliability method, finite element discount method and artificial intelligence method were used to calculate the stability of the slope. [12,13]. The strength reduction method (SRM) is currently recognized by most scholars, and it has been widely used in analyzing slope stability [14,15].…”