Banca de DEFESA: NATHALIA MARINHO BARBOSA

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
DISCENTE : NATHALIA MARINHO BARBOSA
DATA : 31/03/2017
HORA: 14:30
LOCAL: Auditório do CTEC
TÍTULO:

nao consta

PALAVRAS-CHAVES:

Analysis of the Stability of Slopes. Stress analysis. Geotechnical Properties. Erosive Processes.  Sea Cliffs.  

PÁGINAS: 128
GRANDE ÁREA: Engenharias
ÁREA: Engenharia Civil
SUBÁREA: Geotécnica
ESPECIALIDADE: Mecânicas dos Solos
RESUMO:

This Dissertation treat of obtaining geotechnical properties of sediments of Barreiras Formation and the stability analysis of the cliffs located at the Barreira do Inferno Launches Center, Parnamirim, Rio Grande do Norte State. Coastal areas attracts great interest for the population in general, and developments in these regions are quite common, causing erosive processes to be studied in order to provide a better understanding of the factors influencing the Stability of the cliffs and consequently their safety. The study site in question, being a protected military area, is completely free of human interference and without any edification at its top, making the analysis representative of natural conditions imposed on the slopes studied. The activities developed during the elaboration of this dissertation are grouped in four stages: bibliographic revision, fieldwork, laboratory tests and stability analysis of the cliffs. Based on visits accomplished in situ, information was collected for the subsequent retrieval of the critical profiles of the cliffs for stability analysis. It was observed that the profiles in general aren’t steep, with the presence of basal incision in some areas. It was verified in analyzes that the tensile tensions acting are low. The main mechanism responsible for triggering the instability processes is basically the soil saturation caused by rainfall, which decreases its resistance and generates mass movements. From the tests carried out, it was observed that the cohesion of the saturated soils is around 26% of the soil cohesion in the natural moisture content. However, the angles of friction in both cases suffer inexpressive variations It was concluded that the presence of the basal incision had no significant effect on the reduction of stability in the configurations analyzed by the limit equilibrium methods, while stress analysis showed an increase in tensile stresses on the face of the section. The study of the stability analysis performed in this work effectively represented the types of rupture observed in the cliffs of the coast of Rio Grande do Norte, being more coherent than those obtained by traditional methods.

MEMBROS DA BANCA:
Presidente - 1149451 - OLAVO FRANCISCO DOS SANTOS JUNIOR
Interno - 1692497 - OSVALDO DE FREITAS NETO
Externo à Instituição - MARCOS BARRETO DE MEDNONÇA - UFRJ