In this thesis, studies associated with the stability analyses of the box-shaped dump-site culvert constructed in Tinaz Surface Mine of Turkish Coal Enterprises (TKi) are presented. In addition, stability conditions of other culvert alternatives are evaluated. Existence of creeks in a surface mining area is a significant factor to be considered in selection of dump-site location. Since, the dumped overburden material on the valley acts as a barrier and behaves like a dam causing flood problem behind the dump-site. TKi engineers prevented the flood potential that might have occurred behind the dump-site by constructing a 480-meter long reinforced-concrete culvert on the downstream of Gevenez Creek Valley. However, considerable amount of deformations occurred in the first 100 meters of the culvert, as a result of overburden material being replaced on this structure. In order to determine the failure mechanism associated with the culvert, a series of numerical modeling analyses were carried out utilizing back analysis technique. The validity of the numerical model was justified by convergence measurements and observations carried out inside the culvert as overburden material being replaced on the stable part of this structure. Finally, based on the numerical model developed, the stability of other culvert alternatives that could be used in future projects were evaluated considering different embankment conditions (positive projecting and negative projecting), bedding conditions (impermissible, ordinary, first-class and concrete cradle), culvert shapes (box and circular) and dumping conditions.

Made available in DSpace on 2015-03-26T13:28:06Z (GMT). No. of bitstreams: 1 texto completo.pdf: 3004855 bytes, checksum: 8c6dc42c3bf3298aebd37674c17413c4 (MD5) Previous issue date: 2011-08-31 / The final disposal of municipal solid wastes in inadequate areas, like dumping sites, represents great risk for the environmental quality and for public health. Therefore, the present work intended to assess the superficial water quality in the surround area of Ponte Nova MG dump site: in three points on Sombrio Stream downstream the dump site, one water nascent upstream and the leachate of the stabilization pond. It was analyzed physical, chemical and microbiological parameters in the water and in the leachate and the results were compared with the limits concentrations recommended by CONAMA Resolution 357/2005. It was also analyzed the metal content on the sediments of the monitoring points on the stream and on the stabilization pond´s sludge and the results were compared with the CONAMA Resolution 344/2004. Moreover, it was also analyzed the metal content on the ichthyofauna on a pay fishing establishment, located at about 1,5 km of the dump site, and the results were compared with the Sanitary Agency law Portaria ANVISA 685/98. In general, it can be said that the water in Sombrio Stream is not with its quality severely impaired, although, there are evidences that it is being impacted by the dump site. / A disposição final de resíduos sólidos urbanos em áreas inadequadas, como lixões, representa um grande risco para a qualidade ambiental e para a saúde pública. Dessa maneira, o presente trabalho objetivou avaliar a qualidade da água superficial do entorno do lixão de Ponte Nova MG, em três pontos no Córrego Sombrio: a jusante do lixão, em uma nascente a montante e a lagoa de estabilização do lixão. Foram avaliados parâmetros físicos, químicos e microbiológicos na água e no lixiviado e os resultados foram comparados com os limites para corpos de água classe 2 estabelecidos na Resolução CONAMA 357/05. Foi avaliado, também, o teor de metais nos sedimentos dos pontos de amostragem e no lodo da lagoa de estabilização e os resultados foram comparados com os valores orientadores da Resolução CONAMA 344/04. Além disso, foi avaliada a concentração de metais na ictiofauna do Pesque-Pague Sombrio, localizado a, aproximadamente, 1,5 km do lixão e, os resultados foram comparados com os limites preconizados pela Portaria 685/98 da ANVISA. De uma maneira geral, pode-se concluir que a qualidade da água do Córrego Sombrio apresenta indícios de contaminação pelo lixão.