Evaluation of the Mechanical Behavior of a Retaining Wall Structure on a Weathered Soil through Probabilistic Methods
Retaining slope structures are increasingly considered in geotechnical engineering projects due to extensive urban cities growth. These kinds of engineering constructions may present instabilities over the time and may require reinforcement or even rebuilding of the structure. In this context, statistical analysis is an important tool for decision making regarding retaining structures. This study approaches the failure probability of the construction of a retaining wall over the debris of an old and collapsed one. The new solution’s extension length will be of approximately 350 m and will be located over the margins of the Lake Paranoá, Brasilia, in the capital of Brazil. The building process must also account for the utilization of the ruins as a caisson. A series of in situ and laboratory experiments defined local soil strength parameters. A Standard Penetration Test (SPT) defined the in situ soil stratigraphy. Also, the parameters obtained were verified using soil data from a collection of masters and doctoral works from the University of Brasília, which is similar to the local soil. Initial studies show that the concrete wall is the proper solution for this case, taking into account the technical, economic and deterministic analysis. On the other hand, in order to better analyze the statistical significance of the factor-of-safety factors obtained, a Monte Carlo analysis was performed for the concrete wall and two more initial solutions. A comparison between the statistical and risk results generated for the different solutions indicated that a Gabion solution would better fit the financial and technical feasibility of the project.
Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1132683Procedia APA BibTeX Chicago EndNote Harvard JSON MLA RIS XML ISO 690 PDF Downloads 947
 Albuquerque, B., Campos, D. (2015). "Analytical Slope Stability Analysis Based on the Statistical Characterization of Soil Shear Strength". World Academy of Science, Engineering and Technology, International Science Index 107, International Journal of Civil, Environmental, Structural, Construction and Architectural Engineering, 9(11), 1429 - 1434.
 Albuquerque, B. C. P., Domingues, V. R. (2016). “Infinite Slope Analysis: A Statistical Approach in Risk Management”. Proceedings of the Fourth International Conference on New Developments in Soil Mechanics and Geotechnical Engineering, Lefkosas, ISSN/ISBN: 9758359282.
 Campos, D., Mascarenhas, P., Almeida, L., Albuquerque, B., Domingues, V and Ozelim, L. (2017). “Análise de viabilidade técnico-econômica em um caso real de projeto de estrutura de contenção”. Artigo técnico, VII Conferência Brasileira sobre estabilidade de encostas, Florianópolis, SC. (em análise).
 Chalermyanont, T., and Benson, C. (2005). “Reliability-based design for external stability of mechanically stabilized earth walls” Int. J. Geomech., 10.1061/(ASCE)1532-3641(2005)5:3(196), 196–205.
 Cerri, L. E. S. (1993). “Riscos geológicos associados a escorregamentos: uma proposta para prevenção de acidentes”. Tese de Doutorado, UNESP, Rio Claro, 197p.
 Moreira, J. E. (1989). “A philosophic approach to geothecnical engineering” De Mello Volume. São Paulo: Ed. Edgard Blucher Ltda, 331-358.
 Nogami, J. S; Villibor, D. F. (1994). “Identificação Expedita dos Grupos de Classificação MCT para Solos Tropicais”. - Foz do Iguaçu, Brasil, Anais do 10° COBRAMSEFABMS, Vol. 4, 1293-1300.
 Ozelim, L., Cavalcante, A., Pacheco de Assis, A., and Ribeiro, L. (2014). "Analytical Slope Stability Analysis Based on Statistical Characterization of Soil Primary Properties." Int. J. Geomech., 10.1061/(ASCE)GM.1943-5622.0000382, 06014018.
 Rowe, William D. Alter. (1987) Alternative risk evaluation paradigms. In: HAIMES, Yacov Y. & STAKHIV, Eugene Z. Risk analysis and management of natural and man-made hazards. New York: American Society of Civil Engineers. p.1-21.
 SINAPI- Sistema Nacional de Pesquisa de custos e índices da construção civil com encargos sociais desonerados para Distrito Federal (2017). Brasília, 531p.
 Whitman, R. V. (1984). “Evaluating calculated risk in geotechnical engineering.” J. Geotech. Engrg., 110(6), 143–188.
 Wolfram Research, Inc. (2017) Mathematica, Champaign, Estados Unidos, Versão 11.