DBPapers
DOI: 10.5593/SGEM2016/B13/S02.036

SLOPE STABILITY ASSESSMENT IN ZONES 3 AND 4 OF CATUMBELA COMMUNE, BENGUELA, ANGOLA

J. Segunda, M. Quinta-Ferreira
Tuesday 6 September 2016 by Libadmin2016

References: 16th International Multidisciplinary Scientific GeoConference SGEM 2016, www.sgem.org, SGEM2016 Conference Proceedings, ISBN 978-619-7105-57-5 / ISSN 1314-2704, June 28 - July 6, 2016, Book1 Vol. 3, 285-292 pp

ABSTRACT
The study and stability evaluation of four slopes (three natural and one excavated) located in the commune of Catumbela, Angola is presented. The work was developed based on existing maps and on a detailed field reconnaissance carried out to obtain relevant parameters for the slopes. A kinematic evaluation of stability was performed for each slope, based on the discontinuity sets, on the rock materials properties and on the slope characteristics. The factors that could affect the stability of the rock mass were analysed. The Rock Mass Rating (RMR) and the Slope Mass Rating (SMR) systems were used to evaluate the slope characteristics and behaviour. The methodology used allowed the classification of the rock mass and the anticipation of the likelihood of failure. The combination of the external geodynamic factors together with human interference contributed to the development of slope stability problems, sometimes causing very serious consequences like the loss of lives, the blocking of roads, the destruction of buildings and the increase in poverty. Containment and stabilization works are necessary to reduce the damages. An improved land occupation management is also required to reduce the hazards for local populations.

Keywords: slope stability, marly limestone, RMR and SMR, Catumbela - Angola