New method for 3D and asymmetrical slope stability analysis

C. C. Huang, C. C. Tsai

Research output: Contribution to journalArticlepeer-review

126 Citations (Scopus)


A new three-dimensional (3D) slope stability analysis method is developed based on two-directional moment equilibrium. This method calculates not only the safety factor but also the possible direction of sliding for semispherical and composite failure surfaces. As a result, the possible errors associated with assuming a plane of symmetry in 3D stability analyses are eliminated. Another advantage of the new method is to eliminate the tedious work on the coordinate transformation prior to the analysis. Two examples of symmetrical failure surfaces are used to verify the basic formulation in the present study. Three additional examples further demonstrate the applicability of the proposed method in analyzing 3D asymmetrical failure surfaces. An analysis on a slope, subject to asymmetrical excavation unloading and geological conditions, shows that using the method of one-directional moment equilibrium may give an overestimated safety factor of the slope.

Original languageEnglish
Pages (from-to)917-927
Number of pages11
JournalJournal of Geotechnical and Geoenvironmental Engineering
Issue number10
Publication statusPublished - 2000 Oct 1

All Science Journal Classification (ASJC) codes

  • Geotechnical Engineering and Engineering Geology
  • Environmental Science(all)


Dive into the research topics of 'New method for 3D and asymmetrical slope stability analysis'. Together they form a unique fingerprint.

Cite this