Submitted by Automa??o e Estat?stica (sst@bczm.ufrn.br) on 2015-11-12T14:50:39Z No. of bitstreams: 1 RubensDiegoFernandesAlves_DISSERT.pdf: 4069209 bytes, checksum: 315c799d62f2b21007c4482cf2c6437f (MD5) / Approved for entry into archive by Elisangela Moura (lilaalves@gmail.com) on 2015-11-16T14:15:30Z (GMT) No. of bitstreams: 1 RubensDiegoFernandesAlves_DISSERT.pdf: 4069209 bytes, checksum: 315c799d62f2b21007c4482cf2c6437f (MD5) / Made available in DSpace on 2015-11-16T14:15:30Z (GMT). No. of bitstreams: 1 RubensDiegoFernandesAlves_DISSERT.pdf: 4069209 bytes, checksum: 315c799d62f2b21007c4482cf2c6437f (MD5) Previous issue date: 2014-02-28 / A partir de ensaios de provas de carga de estacas pr?-moldadas de concreto e sondagens do tipo SPT, realizou-se um estudo da obten??o da carga de ruptura da funda??o atrav?s de m?todos semiemp?ricos, el?sticos e de extrapola??o da curva carga-recalque. Ap?s isso, realizaram-se compara??es entre os diversos m?todos utilizados para dois tipos de solo, um de comportamento granular e outro coesivo.Para obten??o dos par?metros do solo a serem utilizados nos m?todos estabeleceuse correla??es emp?ricas com o ?ndice de resist?ncia a penetra??o (NSPT). As curvas carga-recalque das estacas tamb?m s?o analisadas. Diante das compara??es estabelecidas indica-se o m?todo mais confi?vel para cada tipo de solo. / The piles are one of the most important types of solution adopted for the foundation of buildings. They are responsible for transmitting to the soil in deepe r and resistant layers loads from structures. The interaction of the foundation element with the soil is a very important variable, making indispensable your domain in order to determine the strength of the assembly and establish design criteria for each c ase of application of the pile. In this research analyzes were performed f rom experiments load tests for precast concrete piles and inve stigations of soil of type SPT, a study was performed for obtaining the ultimate load capacity of the foundation through methods extrapolation of load - settlement curve , semi - empirical and theoretic . After that, were realized comparisons between the different methods used for two types of soil a granular behavior and other cohesive. For obtaining soil paramet ers to be used i n the methods were established empirical correlations with the standard penetration number (NSPT). The charge - settlement curves of the piles are also analyzed. In the face of established comparisons was indicated the most reliable semiempirical method D?co urt - Quaresma as the most reliable for estimating the tensile strength for granular and cohesive soils. Meanwhile, among the methods studied extrapolation is recommended method of Van der Veen as the most appropriate for predicting the tensile strength.