Some assumptions for the slip surface of 3D soil slopes: (a

Reliability analysis of slopes considering spatial variability of soil properties based on efficiently identified representative slip surfaces - ScienceDirect

A 3D slope is cut by an ellipsoidal: (a) side view and (b) top view.

PDF) Determining the Critical Slip Surface of Three-Dimensional Soil Slopes from the Stress Fields Solved Using the Finite Element Method

Automatic identification of the critical slip surface of slopes - ScienceDirect

Surface layer method for analysis of slope stability using finite elements - ScienceDirect

Full article: A study on locating critical slip surface of slopes

Comparison of calculated FOS values to Duncan et al. (1990)

A GIS-based 3D slope stability analysis method based on the assumed normal stress on the slip surface

Some assumptions for the slip surface of 3D soil slopes: (a) spherical