2016-04-042015-08-14GOMES, A. C. Monitoramento de uma estrutura de contenção em estacas espaçadas considerando perfil de sucção. 2015. 192 f. Dissertação (Mestrado em Geotecnia, Estruturas e Construção Civil) - Universidade Federal de Goiás, Goiânia, 2015.http://repositorio.bc.ufg.br/tede/handle/tede/5404This study presents the results of an extensive field monitoring program in which the lateral displacements of a nail reinforced sheet pile wall in Goiânia, Brazil were measured during the excavation process. The instrumentation methods adopted were multiple point borehole extensometers (MPBX) and optical surveying. The MPBX showed good results that could be appropriately interpreted as the excavation progressed. However, the measurements of optical surveying were not reliable due the low precision of total station and for being highly affected by user’s errors. In order to determine the geotechnical profile, laboratory test were undertaken to obtain strength and deformation parameters for unsaturated and saturated soil conditions. The large variability of the soil, observed in terms of void ratio, presented an important obstacle, making the determination of representative shear strength parameters a challenge. As a way to bridge the analysis of field monitoring results, soil properties and the numerical back analyses of the retaining walls, the water content profile and the soil-water characteristic curve were measured. Such data was used to obtain the suction profile and evaluated its influence in the monitored field data. Finally, the numerical code Sheeting Check (Geo5), which uses the beam on elastic foundation method, was employed to obtain the soil subgrade reaction modulus (ks) and determine the retaining wall deformation profile and earth pressures in saturated and unsaturated soil condition. The maximum lateral displacements values found in the numerical back analyses were compatible with the monitoring results. Besides, the influence of unsaturated soil conditions and soil suction in the reduction of the retaining wall deformations and the active earth pressures were observed.application/pdfAcesso AbertoMonitoramentoEstruturas de contençãoSolos não saturadosMétodo da viga sobre apoio elásticoMódulo de reação do soloMonitoringRetaining wallUnsaturated soilsBeam on elastic foundation methodSubgrade reaction of soilENGENHARIA CIVIL::GEOTECNICADissertação