Universiti Teknologi Malaysia Institutional Repository

Determination of three-dimensional shape of failure in soil slopes

Kalatehjari, Roohollah and Arefnia, Ali and A. Rashid, Ahmad Safuan and Ali, Nazri and Hajihassani, Mohsen (2015) Determination of three-dimensional shape of failure in soil slopes. Canadian Geotechnical Journal, 52 (9). pp. 1283-1301. ISSN 0828-8666

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Abstract

This paper presents the application of particle swarm optimization (PSO) in three-dimensional (3D) slope stability analysis to determine the shape and direction of failure as the critical slip surface. A detailed description of adopted PSO is presented and a rotating ellipsoidal shape is introduced as the possible failure surface in the analysis. Based on the limit equilibrium method, an equation of factor of safety (FoS) was developed with the ability to calculate the direction of sliding (DoS) in its internal process. A computer code was developed in Matlab to determine the 3D shape of the failure surface and calculate its FoS and DoS. Then, two example problems were used to verify the applicability of the presented code, the first by conducting a comparison between the results of the code and PLAXIS-3D finite element software and the second by re-analyzing an example from the literature to find the 3D failure surface. In addition, a hypothetical 3D asymmetric slope was introduced and analyzed to demonstrate the ability of the presented method to determine the shape and DOS of failure in 3D slope stability problems. Finally, a small-scale physical model of a 3D slope under vertical load was constructed and tested in the laboratory and the results were re-analyzed and compared with the code results. The results demonstrate the efficiency and effectiveness of the presented code in determining the 3D shape of the failure surface in soil slopes.

Item Type:Article
Uncontrolled Keywords:critical slip surface, direction of sliding, geotechnical engineering, optimization, slope stability
Subjects:A General Works
ID Code:58270
Deposited By: Haliza Zainal
Deposited On:04 Dec 2016 12:07
Last Modified:27 Apr 2017 14:10

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